A method and device for automatically separating metal foreign matter from composite solid propellant

Abstract

The present application discloses a method and device for automatically separating metal foreign matter from composite solid propellants. The method comprises the following steps: extruding the composite solid propellant through a discharge pipe, and using a metal detector to detect metal foreign matter in the composite solid propellant flowing through a screening drum; when the metal detector detects metal foreign matter, sealing the discharge ports of the screening drum and the discharge pipe, moving the screening drum to the top of a recovery barrel, and allowing the composite solid propellant in the screening drum to flow into the recovery barrel; then moving the screening drum to the bottom of the discharge pipe, continuing to allow the composite solid propellant to pass through the screening drum, and repeating the above steps; when the metal detector does not detect metal foreign matter, the detected composite solid propellant flows into a billet box, and when the composite solid propellant in the billet box reaches a set amount, sealing the discharge port of the screening drum through a second sealing plate. The present application solves the problem of high risk in the prior art of manually screening for metal foreign matter in composite solid propellants.

Description

Technical Field

[0001] The present application belongs to the field of propellant technology, and specifically relates to a method and device for automatically separating metallic foreign matter from composite solid propellant. Background Art

[0002] Composite solid propellant is a high-quality energetic material primarily used as fuel for space rockets and various missiles. With the increasing frequency of space launches and the need for a growing national defense capability, the use of composite solid propellant, which accounts for the vast majority of the volume and weight of rockets and missiles, is increasing in volume and importance. However, the charging process of solid rocket motors inevitably produces a certain amount of process residue. This residue has the same performance as the original motor charge, but the manufacturing process and performance testing require additional material to be added during charging.

[0003] Traditionally, in China, composite solid propellant process waste has been destroyed through incineration. With the increasing use of solid rocket engines, the amount of waste generated has also increased. Incineration not only requires significant manpower, material, and financial resources, but also produces toxic and harmful gases, which can pollute the environment. To support national energy conservation and environmental protection initiatives, promote green development, and reuse waste while generating economic benefits, research has been conducted on the industrial application of composite solid propellant waste, which previously required destruction, in engineering blasting projects. Extensive testing has shown that processing composite solid propellant waste into small pellets maximizes its effectiveness. Fluid composite solid propellant waste can be contaminated with metallic foreign matter during production. To ensure that the finished pellets are free of metallic foreign matter and ensure safety during subsequent disposal, the waste must be detected and separated during recycling. Screening for metallic foreign matter is typically performed manually, but as energetic materials, composite solid propellants pose a risk of combustion and even explosion, posing a safety risk to workers. Summary of the Invention

[0004] The embodiments of the present application provide a method and apparatus for automatically separating metal foreign matter from composite solid propellants, thereby solving the problem of high risk in the prior art of manually screening for metal foreign matter in composite solid propellants.

[0005] To achieve the above objectives, an embodiment of the present invention provides a method for automatically separating metallic foreign matter from a composite solid propellant, comprising the following steps:

[0006] Step 1: Start the propulsion mechanism. The push disk of the propulsion mechanism squeezes the composite solid propellant in the feed barrel through the discharge pipe, and controls the outflow rate of the composite solid propellant so that the composite solid propellant in the discharge pipe is less than half of the volume of the discharge pipe.

[0007] Step 2: When the composite solid propellant passes through the screening drum, the first detection part of the metal detector detects metal foreign matter in the composite solid propellant flowing through the screening drum;

[0008] When the metal detector detects a metal foreign body, execute step 3, and then execute step 1 again;

[0009] When the metal detector does not detect any metal foreign matter, the detected composite solid propellant flows downward into the billet box. When the composite solid propellant in the billet box reaches the set amount, the propulsion mechanism is closed, the discharge port of the screening drum is blocked by the second sealing plate, and then the next billet box is moved to the bottom of the screening drum by the conveying mechanism;

[0010] Step three, step 301, close the propulsion mechanism and seal the discharge port of the screening drum with the second sealing plate;

[0011] Step 302: After a set time period, the discharge port of the discharge pipe is sealed by a first sealing plate;

[0012] Step 303: Move the screening drum and the second sealing plate simultaneously to the top of the recovery barrel, and then move the second sealing plate out of the discharge port of the screening drum, so that the composite solid propellant in the screening drum flows downward into the recovery barrel.

[0013] Step 304: Move the screening drum to the lower end of the discharge pipe, and move the first sealing plate out of the discharge port of the discharge pipe.

[0014] In a possible implementation, step 301 specifically includes the following steps:

[0015] Step 3011, closing the propulsion mechanism;

[0016] Step 3012: detecting metallic foreign matter in the composite solid propellant at the discharge port of the discharge pipe by using the second detection portion of the metal detector;

[0017] When the metal detector detects a metal foreign body, step 3013 is executed;

[0018] When the metal detector does not detect any metal foreign matter, step 3014 is executed;

[0019] Step 3013: wait for a while until the composite solid propellant at the discharge port of the discharge pipe flows downward into the screening cylinder, and then execute step 3012 again;

[0020] Step 3014: seal the discharge port of the discharge pipe with a first sealing plate.

[0021] In a possible implementation, when the conveying mechanism conveys the billet box, the third detection portion of the metal detector detects metallic foreign matter in the composite solid propellant in the billet box;

[0022] When the metal detector detects foreign metal, the billet box is moved to the scrap bin;

[0023] When the metal detector does not detect any foreign metal objects, the billet box continues to be conveyed.

[0024] In a possible implementation, when the discharge port of the screening drum is blocked by the second sealing plate, the angle of the pulling plate is adjusted by the stepping motor to control the extension of the extension end of the electric telescopic rod. The extension end of the electric telescopic rod drives the pulling plate to move. When the pulling plate moves, it pushes the second pulling plate. The second pulling plate causes the second sealing plate to move horizontally to the discharge port of the screening drum through the second sliding rod.

[0025] In step 302, when the discharge port of the discharge pipe is blocked by the first sealing plate, the angle of the pulling plate is adjusted; the extension end is controlled to extend, and the extension end drives the pulling plate to move. When the pulling plate moves, it pushes the first pulling plate, and the first pulling plate translates the first sealing plate to the discharge port of the discharge pipe via the first sliding rod;

[0026] In step 303, when the screening barrel and the second sealing plate are moved simultaneously to the top of the recycling bin, the angle of the pulling plate is adjusted; the extension end is controlled to extend, and when the extension end extends, the pulling plate is driven to move and bypass the second sealing plate; the angle of the pulling plate is adjusted again, and the extension end is controlled to contract, and the extension end drives the pulling plate to move, and when the pulling plate moves, it simultaneously pulls the second drag plate and the third drag plate to move, and the second drag plate translates the second sealing plate through the second sliding rod, and the third drag plate translates the screening barrel through the third sliding rod, until the screening barrel and the second sealing plate are simultaneously moved to the top of the recycling bin.

[0027] The embodiment of the present invention further provides a device for automatically separating metal foreign matter from composite solid propellant, comprising a feeding barrel, a pushing plate, a pushing mechanism, a discharging pipe, a screening cylinder, a metal detector, a first sliding rod, a second sliding rod, a third sliding rod, a first sealing plate, a second sealing plate, a driving mechanism, a recovery barrel, a conveying mechanism, and a billet box;

[0028] The lower end of the feeding barrel is provided with a discharge section, which is in the shape of a trumpet with a larger upper portion and a smaller lower portion, and the small end of the discharge section is connected to a discharge pipe arranged obliquely;

[0029] The upper end of the pusher is connected to a propulsion mechanism, which is clamped in the feed barrel and drives the pusher to move up and down in the feed barrel.

[0030] The screening cylinder is spaced apart and arranged at the lower end of the discharge pipe, and the first detection part of the metal detector is close to the side wall of the screening cylinder; the side of the screening cylinder away from the metal detector is connected to the end of the third sliding rod;

[0031] A first sealing plate is provided on one side of the outlet end of the discharge pipe, and one side of the first sealing plate is connected to the end of the first sliding rod;

[0032] A second sealing plate is provided on one side of the outlet end of the screening cylinder, and one side of the second sealing plate is connected to the end of the second sliding rod;

[0033] The first slide bar, the second slide bar, and the third slide bar are all slidably mounted; the driving mechanism drives the first sealing plate to move along the extension direction of the first slide bar through the first slide bar; the driving mechanism drives the second sealing plate to move along the extension direction of the second slide bar through the second slide bar; the driving mechanism drives the screening drum to move along the extension direction of the third slide bar through the third slide bar;

[0034] The recovery bucket is arranged below the moving path of the screening drum; a conveying mechanism is arranged below the screening drum, and a billet box is arranged on the conveying mechanism.

[0035] In a possible implementation, the third detection portion of the metal detector is disposed close to the conveyor belt of the conveying mechanism, and the width of the third detection portion is greater than the width of the billet box;

[0036] The second detection part of the metal detector is arranged close to the outlet end of the discharge pipe.

[0037] In a possible implementation, the driving mechanism includes a first telescopic mechanism, a second telescopic mechanism, and a third telescopic mechanism;

[0038] The first sliding rod is connected to the telescopic end of the first telescopic mechanism, the second sliding rod is connected to the telescopic end of the second telescopic mechanism, and the third sliding rod is connected to the telescopic end of the third telescopic mechanism.

[0039] In a possible implementation, a first drag plate is provided on the first slide bar, a second drag plate is provided on the second slide bar, and a third drag plate is provided on the third slide bar, and the first drag plate and the second drag plate are both located outside the moving path of the screening drum;

[0040] The driving mechanism includes an electric telescopic rod, a stepping motor, and a pulling plate;

[0041] The stepper motor is installed at the end of the telescopic end of the electric telescopic rod, and one end of the pulling plate is connected to the output shaft of the stepper motor;

[0042] The extension direction of the extension end of the electric telescopic rod is arranged parallel to the first slide rod, the second slide rod, and the third slide rod;

[0043] A space for the pulling plate to pass through is provided between the first pulling plate and the second pulling plate, and a space for the pulling plate to pass through is provided between the second pulling plate and the third pulling plate. The space between the first pulling plate and the third pulling plate is smaller than the space for the pulling plate to pass through.

[0044] In a possible implementation, it further includes a semi-finished product recovery mechanism and an accelerated screening mechanism disposed above the recovery barrel;

[0045] The accelerated screening mechanism includes a push rod and a screening plate; the screening plate is arranged at the end of the telescopic end of the push rod, and the screening plate is used to cooperate with the screening cylinder;

[0046] The semi-finished product recovery mechanism is arranged on the discharge end side of the conveying mechanism.

[0047] In a possible implementation, a monitoring mechanism is provided on one side of the screening drum, and a black line for identification by the monitoring mechanism is provided on the inner side wall of the billet box.

[0048] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0049] Embodiments of the present invention provide a method and apparatus for automatically separating metallic foreign matter from composite solid propellants. This method can separate metallic foreign matter during the process of dispensing the composite solid propellants into billet boxes. The method can operate automatically, requiring only remote or minimal staff inspections to ensure the smooth progress of the process. This improves work efficiency and worker safety, and avoids the high risk of manual screening for metallic foreign matter in composite solid propellants. The apparatus of the present invention requires only simple modifications to existing dispensing equipment to separate metallic foreign matter from composite solid propellants. The apparatus has a simple structure, is easy to implement, and is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] To more clearly illustrate the technical solutions of the embodiments of this application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some of the embodiments described in this application. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.

[0051] Figure 1 A schematic structural diagram of the device for automatically separating metallic foreign matter from composite solid propellant is provided for an embodiment of the present invention.

[0052] Figure 2 A schematic diagram of the position distribution of the first pulling plate, the second pulling plate, and the third pulling plate provided in an embodiment of the present invention.

[0053] Figure 3 Schematic diagram of the state in which the second sealing plate provided in an embodiment of the present invention blocks the discharge port of the screening drum.

[0054] Figure 4A schematic diagram of the state in which the first sealing plate provided in an embodiment of the present invention seals the discharge port of the discharge pipe.

[0055] Figure 5 A schematic diagram of the state in which the screening drum provided in an embodiment of the present invention moves to above the recovery barrel.

[0056] Figure 6 This is a schematic diagram of the state of the composite solid propellant in the screening barrel flowing to the recovery barrel provided by an embodiment of the present invention.

[0057] Figure markings: 1-feeding bucket; 2-discharge pipe; 3-driving mechanism; 31-electric telescopic rod; 32-stepping motor; 33-pulling plate; 4-acceleration screening mechanism; 5-screening cylinder; 6-metal detector; 61-first detection part; 62-second detection part; 63-third detection part; 7-first sealing plate; 8-second sealing plate; 9-first sliding rod; 10-second sliding rod; 11-third sliding rod; 12-propelling mechanism; 13-pushing plate; 14-recovery barrel; 15-conveyance mechanism; 16-bill box; 17-first pulling plate; 18-second pulling plate; 19-third pulling plate. DETAILED DESCRIPTION

[0058] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0059] In the description of the embodiments of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. The terms "first", "second" and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a communication between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to the specific circumstances.

[0060] like Figures 1 to 6As shown, the embodiment of the present invention provides a method for automatically separating metal foreign matter from a composite solid propellant, comprising the following steps:

[0061] Step 1: Start the propulsion mechanism 12. The pushing disk 13 of the propulsion mechanism 12 squeezes the composite solid propellant in the feeding barrel 1 through the discharge pipe 2, and controls the outflow rate of the composite solid propellant so that the composite solid propellant in the discharge pipe 2 is less than half of the volume of the discharge pipe 2.

[0062] Step 2: When the composite solid propellant passes through the screening drum 5 , the first detection part 61 of the metal detector 6 detects metal foreign matter in the composite solid propellant flowing through the screening drum 5 .

[0063] When the metal detector 6 detects a metal foreign body, step three is executed, and step one is executed again after the execution is completed.

[0064] When the metal detector 6 does not detect any metal foreign matter, the detected composite solid propellant flows downward into the billet box 16. When the composite solid propellant in the billet box 16 reaches a set amount, the propulsion mechanism 12 is closed, and the discharge port of the screening drum 5 is blocked by the second sealing plate 8. Then, the next billet box 16 is moved to the bottom of the screening drum 5 through the conveying mechanism 15.

[0065] Step three, step 301 , close the propulsion mechanism 12 and seal the discharge port of the screening drum 5 through the second sealing plate 8 .

[0066] Step 302 : After a set time period, the discharge port of the discharge pipe 2 is sealed by the first sealing plate 7 .

[0067] In step 303 , the screening drum 5 and the second sealing plate 8 are simultaneously moved to the top of the recovery barrel 14 , and the second sealing plate 8 is then moved out of the discharge port of the screening drum 5 , so that the composite solid propellant in the screening drum 5 flows downward into the recovery barrel 14 .

[0068] Step 304 , moving the screening drum 5 to the lower end of the discharge pipe 2 , and moving the first sealing plate 7 out of the discharge port of the discharge pipe 2 .

[0069] It should be noted that the screening barrel 5, the discharge pipe 2, or the inner walls of the screening barrel 5, the discharge pipe 2 in contact with the composite solid propellant are all at a certain angle to the vertical direction, so that the composite solid propellant can flow downward along the inner walls of the screening barrel 5 and the discharge pipe 2, thereby slowing down the downward flow speed of the composite solid propellant, and thus easily achieving the isolation of the composite solid propellant in the screening barrel 5, avoiding the problem of the screening barrel 5 and the discharge pipe 2 being arranged vertically and the composite solid propellant falling directly into the square billet box 16.

[0070] The force applied by the propulsion mechanism 12 and the different inner diameters of the screening cylinder 5 and the discharge pipe 2 can determine the flow rate of the composite solid propellant.

[0071] Composite solid propellants have a high viscosity and flow slowly by themselves. Therefore, the composite solid propellant in the feed barrel 1 is squeezed out by driving the pusher plate 13 with the propulsion mechanism 12, thereby improving the efficiency of loading the composite solid propellant into the billet box 16. At the same time, the inner walls of the sieving drum 5 and the discharge pipe 2 are coated with a material that has low friction with the composite solid propellant, thereby ensuring the efficient flow of the composite solid propellant within the sieving drum 5 and the discharge pipe 2.

[0072] When the propulsion mechanism 12 is closed, the outflow rate of the composite solid propellant from the feed barrel 1 can be greatly reduced. The composite solid propellant in the discharge pipe 2 is less than half of its volume. Therefore, when the discharge port of the discharge pipe 2 is blocked, a large amount of composite solid propellant will not accumulate in the discharge pipe 2. At the same time, the amount of composite solid propellant entering the billet box 16 can be easily controlled.

[0073] The upper ends of the screening drum 5 and the discharge pipe 2 are both flared, thereby preventing the composite solid propellant from falling from both sides thereof. The conveying mechanism 15 and the recovery barrel 14 are arranged crosswise in the vertical direction.

[0074] When the metal detector 6 detects no metallic foreign matter, the billet box 16 is loaded with a set amount of composite solid propellant, the discharge port of the screening drum 5 is sealed by the second sealing plate 8, and the conveyor mechanism 15 moves the next billet box 16 to the bottom of the screening drum 5 for further loading. The conveyor mechanism 15 conveys the loaded billet box 16 to the semi-finished product recovery mechanism.

[0075] When the metal detector 6 detects metal foreign matter, the second sealing plate 8 can retain the composite solid propellant containing the metal foreign matter in the screening drum 5 to prevent it from entering the billet box 16. After the set time period, that is, when the flow rate of the composite solid propellant in the discharge pipe 2 is greatly reduced, the discharge port of the discharge pipe 2 is blocked by the first sealing plate 7. The isolated screening drum 5 is moved to the top of the recovery barrel 14, and then the composite solid propellant containing the metal foreign matter is allowed to flow into the recovery barrel 14 for recovery. When the screening drum 5, the first sealing plate 7, and the second sealing plate 8 are moved to the initial state, the packaging of the composite solid propellant can be continued. The present invention is suitable for separating situations where the content of metal foreign matter in the composite solid propellant is relatively low, and the small amount of composite solid propellant recovered into the recovery barrel 14 can be further processed by other methods.

[0076] When the screening drum 5 is moved to its initial state, the metal detector 6 can be used to inspect the screening drum 5 again for metallic foreign matter. This prevents metallic foreign matter from adhering to the inner wall of the screening drum 5. The present invention can separate metallic foreign matter during the process of dispensing composite solid propellants into billet boxes 16. This method can be automated, requiring only remote inspections or minimal staff patrols to ensure the smooth progress of the process. This improves work efficiency and enhances staff safety, avoiding the high risk of manual screening for metallic foreign matter in composite solid propellants.

[0077] In this embodiment, step 301 specifically includes the following steps:

[0078] Step 3011, close the propulsion mechanism 12.

[0079] Step 3012 : detecting metal foreign matter in the composite solid propellant at the discharge port of the discharge pipe 2 by using the second detection portion 62 of the metal detector 6 .

[0080] When the metal detector 6 detects a metal foreign body, step 3013 is executed.

[0081] When the metal detector 6 does not detect any metal foreign matter, step 3014 is executed.

[0082] Step 3013 , wait for a period of time, the composite solid propellant at the discharge port of the discharge pipe 2 flows downward into the screening drum 5 , and then step 3012 is executed again.

[0083] Step 3014 , sealing the discharge port of the discharge pipe 2 by using the first sealing plate 7 .

[0084] It should be noted that the second detection portion 62 of the metal detector 6 is used to monitor whether there is any metallic foreign matter at the discharge port of the discharge pipe 2. This prevents metallic foreign matter from being located between the first sealing plate 7 and the discharge port of the discharge pipe 2, which could cause friction between the first sealing plate 7 and the metallic foreign matter at the discharge port of the discharge pipe 2 to generate static electricity, potentially leading to combustion or explosion of the composite solid propellant. This improves operational safety. All equipment that comes into contact with the composite solid propellant is equipped with a grounding wire.

[0085] In this embodiment, when the conveying mechanism 15 conveys the billet box 16 , the third detection portion 63 of the metal detector 6 detects metallic foreign matter in the composite solid propellant in the billet box 16 .

[0086] When the metal detector 6 detects a metallic foreign body, the billet box 16 is moved to the scrap bin.

[0087] When the metal detector 6 does not detect any metal foreign matter, the billet box 16 continues to be conveyed.

[0088] It should be noted that the third detection part 63 of the metal detector 6 can re-detect the composite solid propellant packed into the billet box 16 to further ensure that the finished composite solid propellant is not mixed with metal foreign matter.

[0089] In this embodiment, when the discharge port of the screening drum 5 is blocked by the second sealing plate 8, Figure 1 As shown, the angle of the pulling plate 33 is adjusted by the stepping motor 32, so that the pulling plate 33 is aligned with the second drag plate 18, and the extension end of the electric telescopic rod 31 is controlled to extend. The extension end of the electric telescopic rod 31 drives the pulling plate 33 to move. When the pulling plate 33 moves, it pushes the second drag plate 18. The second drag plate 18 moves the second sealing plate 8 to the discharge port of the sieve drum 5 through the second sliding rod 10. After moving, Figure 3 shown.

[0090] In step 302, when the discharge port of the discharge pipe 2 is blocked by the first sealing plate 7, the extension end is controlled to retract. The retraction can facilitate the adjustment of the angle of the pulling plate 33. The angle of the pulling plate 33 is adjusted. The extension end is controlled to extend, and the extension end drives the pulling plate 33 to move. When the pulling plate 33 moves, it pushes the first pulling plate 17. The first pulling plate 17 moves the first sealing plate 7 to the discharge port of the discharge pipe 2 through the first sliding rod 9. After the movement, Figure 4 shown.

[0091] In step 303, when the screening drum 5 and the second sealing plate 8 are simultaneously moved to directly above the recovery bucket 14, the extension end is controlled to retract and the angle of the pulling plate 33 is adjusted. The extension end is controlled to extend, and when the extension end is extended, the pulling plate 33 moves and bypasses the second sealing plate 8. By bypassing the second sealing plate 8, the pulling plate 33 can pull the second and third pulling plates 18, 19. The second and third pulling plates 18, 19 must be positioned to ensure that the pulling plate 33 pulls the second and third pulling plates 18, 19 simultaneously.

[0092] Adjust the angle of the pulling plate 33 again, so that the pulling plate 33 is aligned with the second drag plate 18 and the third drag plate 19, control the extension end to retract, and the extension end drives the pulling plate 33 to move. When the pulling plate 33 moves, it also pulls the second drag plate 18 and the third drag plate 19 to move. The second drag plate 18 translates the second sealing plate 8 through the second slide bar 10, and the third drag plate 19 translates the screening drum 5 through the third slide bar 11, until the screening drum 5 and the second sealing plate 8 are simultaneously moved to the top of the recovery barrel 14. After the movement, Figure 5 shown.

[0093] It should be noted that the conveying direction of the conveying mechanism 15 is perpendicular to the extending direction of the extended end of the electric telescopic rod 31. The operating principle of moving the second sealing plate 8 out of the discharge port of the screening drum 5, moving the screening drum 5 to the lower end of the discharge pipe 2, and moving the first sealing plate 7 out of the discharge port of the discharge pipe 2 is similar to the above steps, that is, when the second sealing plate 8 is moved out of the discharge port of the screening drum 5, the second sealing plate 8 is pushed to move horizontally to the bottom of the first sealing plate 7, as shown in FIG. Figure 6 When moving the screening drum 5 to the lower end of the discharge pipe 2, first move the second sealing plate 8 to one side of the recovery barrel 14, and then move the screening drum 5 to the lower end of the discharge pipe 2. The specific operating principle is the same as the above steps and will not be repeated here.

[0094] An embodiment of the present invention also provides a device for automatically separating metal foreign matter in composite solid propellant, by which the above method can be implemented. The device includes a feeding barrel 1, a pushing plate 13, a propulsion mechanism 12, a discharge pipe 2, a screening barrel 5, a metal detector 6, a first slide bar 9, a second slide bar 10, a third slide bar 11, a first sealing plate 7, a second sealing plate 8, a driving mechanism 3, a recovery barrel 14, a conveying mechanism 15, and a billet box 16.

[0095] The lower end of the feeding barrel 1 is provided with a discharge section, which is in the shape of a trumpet with a larger upper portion and a smaller lower portion. The small end of the discharge section is connected to a discharge pipe 2 which is arranged obliquely.

[0096] The upper end of the pushing disc 13 is connected to the propulsion mechanism 12 . The pushing disc 13 is clamped in the feeding barrel 1 . The propulsion mechanism 12 drives the pushing disc 13 to move up and down in the feeding barrel 1 .

[0097] The screening drum 5 is spaced apart from the lower end of the discharge pipe 2, and the first detection portion 61 of the metal detector 6 is close to the side wall of the screening drum 5. The side of the screening drum 5 away from the metal detector 6 is connected to the end of the third sliding rod 11.

[0098] A first sealing plate 7 is provided on one side of the outlet end of the discharge pipe 2 , and one side of the first sealing plate 7 is connected to the end of the first sliding rod 9 .

[0099] A second sealing plate 8 is provided on one side of the outlet end of the screening drum 5 , and one side of the second sealing plate 8 is connected to the end of the second sliding rod 10 .

[0100] The first slide bar 9, the second slide bar 10, and the third slide bar 11 are all slidably mounted. The driving mechanism 3 drives the first sealing plate 7 to move along the extension direction of the first slide bar 9 via the first slide bar 9. The driving mechanism 3 drives the second sealing plate 8 to move along the extension direction of the second slide bar 10 via the second slide bar 10. The driving mechanism 3 drives the screening drum 5 to move along the extension direction of the third slide bar 11 via the third slide bar 11.

[0101] The recovery barrel 14 is arranged below the moving path of the screening drum 5. A conveying mechanism 15 is arranged below the screening drum 5, and a billet box 16 is arranged on the conveying mechanism 15.

[0102] It should be noted that the propulsion mechanism 12 may adopt a hydraulic propulsion device, which is convenient for controlling the propulsion amount of the pusher plate 13 and has a large thrust range.

[0103] The first sealing plate 7 is connected to the first drag plate 17 via a connecting frame. The first slide bar 9 is disposed on the side of the first drag plate 17 away from the first sealing plate 7. The first slide bar 9 is slidably mounted within the sleeve, which is fixedly mounted. The second sealing plate 8 and the screening drum 5 are connected in a similar manner, and their structures will not be described in detail in this invention.

[0104] The device of the present invention can separate metallic foreign matter from composite solid propellant by only simple modification of the original subpackaging device. The device has a simple structure, is easy to implement and has strong practicality.

[0105] In this embodiment, the third detection portion 63 of the metal detector 6 is disposed close to the conveyor belt of the conveying mechanism 15 , and the width of the third detection portion 63 is greater than the width of the billet box 16 .

[0106] The second detection portion 62 of the metal detector 6 is arranged close to the outlet end of the discharge pipe 2 .

[0107] It should be noted that the second detection part 62 of the metal detector 6 can improve the safety of the device, and the third detection part 63 of the metal detector 6 can further ensure that the finished composite solid propellant is not doped with metal foreign matter.

[0108] In this embodiment, the driving mechanism 3 includes a first telescopic mechanism, a second telescopic mechanism, and a third telescopic mechanism.

[0109] The first sliding rod 9 is connected to the telescopic end of the first telescopic mechanism, the second sliding rod 10 is connected to the telescopic end of the second telescopic mechanism, and the third sliding rod 11 is connected to the telescopic end of the third telescopic mechanism.

[0110] It should be noted that the first telescopic mechanism, the second telescopic mechanism, and the third telescopic mechanism are provided to achieve translation of the first sealing plate 7, the second sealing plate 8, and the screening drum 5. This arrangement facilitates independent control and maintenance of the device.

[0111] In this embodiment, a first drag plate 17 is provided on the first slide bar 9, a second drag plate 18 is provided on the second slide bar 10, and a third drag plate 19 is provided on the third slide bar 11. The first drag plate 17 and the second drag plate 18 are both located outside the moving path of the screening drum 5.

[0112] The driving mechanism 3 includes an electric telescopic rod 31 , a stepping motor 32 , and a pulling plate 33 .

[0113] The stepping motor 32 is mounted on the end of the telescopic end of the electric telescopic rod 31 , and one end of the pulling plate 33 is connected to the output shaft of the stepping motor 32 .

[0114] The extension direction of the extended end of the electric telescopic rod 31 is arranged parallel to the first slide bar 9 , the second slide bar 10 , and the third slide bar 11 .

[0115] like Figure 2 As shown, a space for the pulling plate 33 to pass through is provided between the first pulling plate 17 and the second pulling plate 18, and a space for the pulling plate 33 to pass through is provided between the second pulling plate 18 and the third pulling plate 19. The space between the first pulling plate 17 and the third pulling plate 19 is smaller than the space for the pulling plate 33 to pass through.

[0116] It should be noted that the first drag plate 17 and the second drag plate 18 are both located outside the moving path of the screening drum 5 , which can prevent the first drag plate 17 and the second drag plate 18 from obstructing the movement of the screening drum 5 .

[0117] Pulling plate 33 Figure 2 As shown, the stepper motor 32 drives the pulling plate 33 to rotate. When the pulling plate 33 abuts the first drag plate 17, the second drag plate 18, or the third drag plate 19, it can push or pull the first drag plate 17, the second drag plate 18, or the third drag plate 19, thereby driving the first sealing plate 7, the second sealing plate 8, or the sieving drum 5 connected thereto to move. The space between the first drag plate 17 and the third drag plate 19 is smaller than the space through which the pulling plate 33 passes. Therefore, the pulling plate 33 can simultaneously drive the first drag plate 17 and the third drag plate 19 to move, thereby driving the first sealing plate 7 and the sieving drum 5 to move simultaneously. This structure only requires a telescopic device and a stepper motor 32 to achieve the translation of the first sealing plate 7, the second sealing plate 8, and the sieving drum 5. The driving mechanism 3 has a simple structure and strong operability.

[0118] The stepper motor 32 is an explosion-proof motor or a pneumatic motor.

[0119] In this embodiment, a semi-finished product recovery mechanism and an accelerated screening mechanism 4 provided above the recovery barrel 14 are also included.

[0120] The accelerated screening mechanism 4 comprises a push rod and a screening plate. The screening plate is arranged at the end of the telescopic end of the push rod, and the screening plate is used to cooperate with the screening cylinder 5.

[0121] The semi-finished product recovery mechanism is arranged at the discharge end side of the conveying mechanism 15 .

[0122] It should be noted that when the isolated screening drum 5 moves to just above the recovery barrel 14 , the push rod is controlled to extend the screening plate into the screening drum 5 , and the screening plate moves downward to allow the composite solid propellant to quickly enter the recovery barrel 14 .

[0123] The conveying mechanism 15 conveys the square box 16 to the semi-finished product recovery mechanism to enter the next process for processing.

[0124] The accelerated screening mechanism 4 is only schematically shown. The specific structures of the semi-finished product recovery mechanism and the accelerated screening mechanism 4 are prior arts and thus will not be described in detail.

[0125] In this embodiment, a monitoring mechanism is provided on one side of the screening drum 5 , and a black line for identification by the monitoring mechanism is provided on the inner side wall of the billet box 16 .

[0126] It should be noted that when the composite solid propellant liquid level is above the black line within billet box 16, the monitoring mechanism uses the black line to identify the current state and control the discharge of the composite solid propellant. The monitoring mechanism can use an infrared emitting tube to transmit light to the inner wall of billet box 16. The infrared light is reflected by the white side wall of billet box 16, and the receiving tube receives the reflected light. When the infrared light encounters the black line, it is absorbed. The receiving tube does not receive the reflected light, and after shaping, it outputs an electrical signal, thereby monitoring the composite solid propellant liquid level.

[0127] In this embodiment, it will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be included within the present invention.

Claims

1. A device for automatically separating metallic foreign matter from composite solid propellants, characterized by: The invention comprises a feeding barrel (1), a pushing plate (13), a pushing mechanism (12), a discharging pipe (2), a screening barrel (5), a metal detector (6), a first sliding rod (9), a second sliding rod (10), a third sliding rod (11), a first sealing plate (7), a second sealing plate (8), a driving mechanism (3), a recovery barrel (14), a conveying mechanism (15), and a billet box (16); a discharging section is provided at the lower end of the feeding barrel (1), and the discharging section is in the shape of a trumpet with a larger upper end and a smaller lower end, and a tilting device is connected to the small end of the discharging section. The discharge pipe (2) is obliquely arranged; the upper end of the push plate (13) is connected to a propulsion mechanism (12), the push plate (13) is clamped in the feeding barrel (1), and the propulsion mechanism (12) drives the push plate (13) to move up and down in the feeding barrel (1); the screening barrel (5) is spaced apart at the lower end of the discharge pipe (2), and the first detection part (61) of the metal detector (6) is close to the side wall of the screening barrel (5); the side of the screening barrel (5) away from the metal detector (6) is connected to the end of the third slide bar (11); A first sealing plate (7) is provided on one side of the outlet end of the discharge pipe (2), and one side of the first sealing plate (7) is connected to the end of the first slide bar (9); a second sealing plate (8) is provided on one side of the outlet end of the screening drum (5), and one side of the second sealing plate (8) is connected to the end of the second slide bar (10); the first slide bar (9), the second slide bar (10), and the third slide bar (11) are all slidably installed; the driving mechanism (3) drives the first sealing plate (7) to slide along the extension of the first slide bar (9) through the first slide bar (9) The drive mechanism (3) drives the second sealing plate (8) to move along the extension direction of the second slide bar (10) through the second slide bar (10); the drive mechanism (3) drives the screening drum (5) to move along the extension direction of the third slide bar (11) through the third slide bar (11); the recovery barrel (14) is arranged below the moving path of the screening drum (5); a conveying mechanism (15) is arranged below the screening drum (5), and a billet box (16) is arranged on the conveying mechanism (15); the metal detector (6) The third detection part (63) is arranged near the conveyor belt of the conveying mechanism (15), and the width of the third detection part (63) is greater than the width of the square billet box (16); the second detection part (62) of the metal detector (6) is arranged near the outlet end of the discharge pipe (2); a first drag plate (17) is arranged on the first slide bar (9), a second drag plate (18) is arranged on the second slide bar (10), and a third drag plate (19) is arranged on the third slide bar (11). The first drag plate (17) and the second drag plate (18) are all located outside the moving path of the screening drum (5); the driving mechanism (3) includes an electric telescopic rod (31), a stepping motor (32), and a pulling plate (33); the stepping motor (32) is installed at the end of the telescopic end of the electric telescopic rod (31), and one end of the pulling plate (33) is connected to the output shaft of the stepping motor (32); the telescopic direction of the extended end of the electric telescopic rod (31) is arranged parallel to the first slide bar (9), the second slide bar (10), and the third slide bar (11);A space for the pulling plate (33) to pass through is provided between the first pulling plate (17) and the second pulling plate (18), a space for the pulling plate (33) to pass through is provided between the first pulling plate (17) and the third pulling plate (19), and the space between the second pulling plate (18) and the third pulling plate (19) is smaller than the space for the pulling plate (33) to pass through; when the pulling plate (33) moves, it can push the first pulling plate (17) and the second pulling plate (18); the first pulling plate (17) moves the first sealing plate (7) to the discharge port of the discharge pipe (2) through the first sliding rod (9); the second pulling plate (18) moves the second sealing plate (8) to the discharge port of the screening drum (5) through the second sliding rod (10).

2. The device for automatically separating metallic foreign matter from composite solid propellant according to claim 1, characterized in that: It also includes a semi-finished product recovery mechanism and an accelerated screening mechanism (4) disposed above the recovery barrel (14); The accelerated screening mechanism (4) comprises a push rod and a screening plate; the screening plate is arranged at the end of the telescopic end of the push rod, and the screening plate is used to cooperate with the screening cylinder (5); The semi-finished product recovery mechanism is arranged on the discharge end side of the conveying mechanism (15).

3. The device for automatically separating metallic foreign matter from composite solid propellant according to claim 1, characterized in that: A monitoring mechanism is provided on one side of the screening cylinder (5), and a black line for identification by the monitoring mechanism is provided on the inner side wall of the billet box (16).

4. A method for automatically separating metallic foreign matter from composite solid propellants, characterized in that: The device for automatically separating metallic foreign matter from composite solid propellant according to any one of claims 1 to 3 comprises the following steps: Step 1: starting the propulsion mechanism (12), and the pushing disk (13) of the propulsion mechanism (12) squeezes the composite solid propellant in the feeding barrel (1) through the discharge pipe (2), and controls the outflow rate of the composite solid propellant so that the composite solid propellant in the discharge pipe (2) is less than half of the volume of the discharge pipe (2); Step 2: When the composite solid propellant passes through the screening cylinder (5), the first detection portion (61) of the metal detector (6) detects metallic foreign matter in the composite solid propellant flowing through the screening cylinder (5); When the metal detector (6) detects a metal foreign body, step three is executed, and after completion, step one is executed again; When the metal detector (6) does not detect any metal foreign matter, the detected composite solid propellant flows downward into the billet box (16). When the composite solid propellant in the billet box (16) reaches a set amount, the propulsion mechanism (12) is closed, the discharge port of the screening drum (5) is blocked by the second sealing plate (8), and then the next billet box (16) is moved to the bottom of the screening drum (5) by the conveying mechanism (15); Step three, step 301, close the propulsion mechanism (12), and seal the discharge port of the screening drum (5) through the second sealing plate (8); Step 302, after a set time period, the discharge port of the discharge pipe (2) is sealed by a first sealing plate (7); Step 303, simultaneously moving the screening barrel (5) and the second sealing plate (8) to the top of the recovery barrel (14), and then moving the second sealing plate (8) out of the discharge port of the screening barrel (5), so that the composite solid propellant in the screening barrel (5) flows downward into the recovery barrel (14); Step 304: Move the screening drum (5) to the lower end of the discharge pipe (2), and move the first sealing plate (7) out of the discharge port of the discharge pipe (2).

5. The method for automatically separating metallic foreign matter from composite solid propellant according to claim 4, characterized in that: Step 301 specifically includes the following steps: Step 3011, closing the propulsion mechanism (12); Step 3012, detecting metal foreign matter in the composite solid propellant at the discharge port of the discharge pipe (2) by using the second detection portion (62) of the metal detector (6); When the metal detector (6) detects a metal foreign body, step 3013 is executed; When the metal detector (6) does not detect any metal foreign matter, step 3014 is executed; Step 3013, wait for a period of time, the composite solid propellant at the discharge port of the discharge pipe (2) flows downward into the screening cylinder (5), and then execute step 3012 again; Step 3014: sealing the discharge port of the discharge pipe (2) by means of the first sealing plate (7).

6. The method for automatically separating metallic foreign matter from composite solid propellant according to claim 4, characterized in that: When the conveying mechanism (15) conveys the billet box (16), the third detection part (63) of the metal detector (6) detects metal foreign matter in the composite solid propellant in the billet box (16); When the metal detector (6) detects a metal foreign body, the billet box (16) is moved to a waste bin; When the metal detector (6) does not detect any metal foreign matter, the billet box (16) continues to be conveyed.

7. The method for automatically separating metallic foreign matter from composite solid propellant according to claim 4, characterized in that: When the discharge port of the screening barrel (5) is blocked by the second sealing plate (8), the angle of the pulling plate (33) is adjusted by the stepping motor (32), and the extension end of the electric telescopic rod (31) is controlled to extend. The extension end of the electric telescopic rod (31) drives the pulling plate (33) to move. When the pulling plate (33) moves, it pushes the second drag plate (18). The second drag plate (18) causes the second sealing plate (8) to move horizontally to the discharge port of the screening barrel (5) through the second sliding rod (10); In step 302, when the discharge port of the discharge pipe (2) is blocked by the first sealing plate (7), the angle of the pulling plate (33) is adjusted; the extension end is controlled to extend, and the extension end drives the pulling plate (33) to move, and when the pulling plate (33) moves, it pushes the first drag plate (17), and the first drag plate (17) moves the first sealing plate (7) to the discharge port of the discharge pipe (2) through the first sliding rod (9); In step 303, when the screening barrel (5) and the second sealing plate (8) are simultaneously moved to the top of the recycling barrel (14), the angle of the pulling plate (33) is adjusted; the extension end is controlled to extend, and when the extension end extends, the pulling plate (33) is driven to move and bypass the second sealing plate (8); the angle of the pulling plate (33) is adjusted again, and the extension end is controlled to retract, and the extension end drives the pulling plate (33) to move, and when the pulling plate (33) moves, the second drag plate (18) and the third drag plate (19) are simultaneously pulled to move, and the second drag plate (18) translates the second sealing plate (8) through the second slide bar (10), and the third drag plate (19) translates the screening barrel (5) through the third slide bar (11), until the screening barrel (5) and the second sealing plate (8) are simultaneously moved to the top of the recycling barrel (14).

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