A screen type anti-settling device

Abstract

The application provides a filter screen type anti-settling device, which comprises a body blast warhead shell, a center grain is arranged at the center of the body blast warhead shell, and a plurality of filter screen type bags are arranged on the body blast warhead shell and the center grain; a space around the center grain is a liquid phase component filling cavity, and a space in the filter screen type bag is a solid phase component filling cavity. The solid phase fuel component is arranged in the filter screen type bag, the solid phase fuel component is fixed in a relatively certain position, the liquid phase fuel component is mixed with the solid phase fuel component through the apertures of the filter screen type bag, the solid phase fuel component cannot be settled in a large size after being fixed, the centroid offset of the body blast warhead is greatly reduced, and the hitting accuracy on the target is ensured; after the warhead is launched, the solid phase fuel component is mixed with the liquid phase fuel component again, the proportion when the power is maximum is reached, and the explosion power of the body blast warhead is ensured.

Description

Technical Field

[0001] This invention belongs to the technical field of anti-separation devices, and relates to an anti-settling device, particularly a filter-type anti-settling device. Background Technology

[0002] The bulk detonation warhead is filled with high-energy fuel. Driven by the explosive detonation, the high-energy fuel is ejected into the air. The high-energy fuel mixes with the air to form a large-scale active cloud. After a secondary detonation by the explosive, the active cloud produces a bulk detonation, releasing a powerful shock wave. It is one of the most powerful weapons.

[0003] The increased explosive power of bulk detonation warheads primarily relies on enhancing the energy of their internal fuel. Gui Dayong et al. reported in their literature that adding metal powder (particle size 10-20 micrometers) to liquid fuel creates a solid-liquid mixture. Because the metal powder has a high calorific value, this significantly increases the energy of the fuel within the bulk detonation warhead. Since the solid-liquid mixture is immiscible and its components have different densities, under gravity, the denser material settles to the bottom, while the less dense material rises to the top.

[0004] The proportions of each component in a solid-liquid mixture fuel formulation are those that maximize its yield. Once the solid-liquid mixture stratifies, the fuel in each part cannot participate in the explosive reaction at its maximum yield during subsequent dispersion and secondary initiation. Wang Haiyang et al. reported in their literature that when the proportions of the components in a solid-liquid mixture differ, the detonation pressure, detonation velocity, and critical initiation energy of the bulk detonation vary significantly. Changes in the proportions of the components in the solid-liquid mixture will lead to a substantial decrease in the yield of the bulk detonation warhead.

[0005] After the solid-liquid phase fuel mixture undergoes stratification, the center of mass of the bulk detonation warhead also changes accordingly. Li Nan et al. reported in their literature that in the defense field, the position of the center of mass is related to the warhead's flight attitude, flight speed, and flight direction, ultimately affecting the warhead's trajectory. The warhead's flight trajectory depends on factors such as the center of mass and the guidance system. When the warhead's center of mass deviates from the flight plane, it will give the warhead an additional torque, changing its trajectory. Radial deviation of the warhead's center of mass will cause it to generate a yaw moment, and axial deviation will cause it to generate a pitching moment. Severe center of mass offset will cause the warhead to lose balance or deviate from its trajectory, thus preventing the warhead from hitting the target area. As can be seen from the above analysis, center of mass offset will reduce the warhead's accuracy in hitting the target. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a filter-type anti-settlement device, which solves the technical problem that the stratification of solid-liquid mixed fuels can easily lead to a serious shift in the center of mass of the bulk detonation warhead.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] A filter-type anti-settlement device includes a bulk detonation warhead casing and a filter-like bag.

[0009] The aforementioned bulk detonation warhead shell is a hollow cylindrical structure and a rotating body, with its axis of rotation perpendicular to the ground. A central propellant grain is coaxially disposed at the center of the bulk detonation warhead shell. The central propellant grain is cylindrical, with its top end connected to the top surface of the bulk detonation warhead shell and its bottom end connected to the bottom surface. The space enclosed by the bulk detonation warhead shell around the central propellant grain is a liquid phase component filling cavity, which is an annular cylindrical structure. An exhaust port is provided on the top surface of the bulk detonation warhead shell, and a feed port is provided on the bottom surface of the bulk detonation warhead shell. Both the exhaust port and the feed port are connected to the liquid phase component filling cavity.

[0010] The bulk detonation warhead casing is provided with a plurality of first filter mesh bags fixedly disposed inside the casing. The outer side of the first filter mesh bags is fixedly connected to the inner wall of the side of the bulk detonation warhead casing, and the inner side of the first filter mesh bags extends inward along the radial direction. The plurality of first filter mesh bags located on the same vertical plane are evenly distributed at equal intervals along the axial direction of the bulk detonation warhead casing, and the plurality of first filter mesh bags located on the same horizontal plane are evenly distributed at equal intervals along the circumferential direction of the bulk detonation warhead casing.

[0011] Multiple second filter bags are fixedly installed on the central drug column. The inner side of the second filter bags is fixedly connected to the outer wall of the side of the central drug column, and the outer side of the second filter bags extends outward in the radial direction. Multiple second filter bags located on the same vertical plane are evenly distributed at equal intervals along the axial direction of the central drug column, and multiple second filter bags located on the same horizontal plane are evenly distributed at equal intervals along the circumferential direction of the central drug column.

[0012] Multiple first filter mesh bags and multiple second filter mesh bags located on the same vertical plane are staggered in the liquid phase component filling cavity.

[0013] The space inside the first and second filter mesh bags is a solid phase component filling cavity. The surfaces of the first and second filter mesh bags have mesh pores, which connect the liquid phase component filling cavity and the solid phase component filling cavity.

[0014] The present invention also has the following technical features:

[0015] The first and second filter mesh bags are woven from polytetrafluoroethylene yarn.

[0016] The diameter of the polytetrafluoroethylene wire is 0.2 to 0.4 mm.

[0017] The maximum diameter of the mesh pores on the surface of the first and second filter bags is 5 micrometers.

[0018] The method of using the filter-type anti-settling device includes the following process: loading the solid fuel component into the first filter mesh bag and the second filter mesh bag, and then assembling the filter-type anti-settling device; injecting the liquid fuel component from the feed hole at the bottom of the body detonation warhead casing, during the injection process, the liquid surface of the liquid fuel component moves from bottom to top, and the rising speed of the liquid surface of the liquid fuel component is 0.3 mm / s.

[0019] Compared with the prior art, the present invention has the following technical effects:

[0020] This invention involves placing a solid fuel component within a mesh bag, which is then fixed inside the bulk detonation warhead casing. Because the solid fuel component is smaller than the mesh openings of the filter bag, it will not escape and will remain in a relatively fixed position. A liquid fuel component is then introduced into the warhead casing, mixing with the solid fuel component through the pores of the filter bag. This process prevents large-scale settling of the solid fuel component, mitigating stratification and significantly reducing the warhead's center-of-gravity shift. This avoids the impact of center-of-gravity shift on the trajectory and ensures target accuracy. After launch, the solid and liquid fuel components remix to achieve the optimal ratio for maximum explosive power, guaranteeing the warhead's detonation yield. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a filter-type anti-settling device.

[0022] The meanings of the labels in the figure are as follows: 1-body of the detonation warhead, 2-central propellant, 3-liquid component filling cavity, 4-vent hole, 5-feed hole, 6-first filter bag, 7-second filter bag, 8-solid component filling cavity.

[0023] The specific content of the present invention will be further explained in detail below with reference to the embodiments. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, all components and fuels in this invention are those known in the art. For example, the central explosive charge 2 uses a conventional detonating explosive charge known in the prior art. The liquid fuel component filled in the liquid component filling cavity 3 uses a conventional liquid fuel component known in the prior art. The solid fuel component filled in the solid component filling cavity 8 uses a solid fuel component known in the prior art (such as metal powders like aluminum powder).

[0025] The following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments. All equivalent modifications made based on the technical solutions of this application fall within the protection scope of the present invention.

[0026] Example 1:

[0027] This embodiment provides a filter-type anti-settling device, such as... Figure 1 As shown, it includes a bulk-detonation warhead casing 1 and a filter mesh bag.

[0028] The bulk detonation warhead shell 1 is a hollow cylindrical structure and a rotating body, with its axis of rotation perpendicular to the ground. A central propellant 2 is coaxially arranged at the center of the bulk detonation warhead shell 1. The central propellant 2 is a cylindrical structure, with its top end connected to the top surface of the bulk detonation warhead shell 1 and its bottom end connected to the bottom surface of the bulk detonation warhead shell 1. The space enclosed by the bulk detonation warhead shell 1 around the central propellant 2 is a liquid phase component filling cavity 3, which is a ring-shaped cylindrical structure. An exhaust port 4 is provided on the top surface of the bulk detonation warhead shell 1, and a feed port 5 is provided on the bottom surface of the bulk detonation warhead shell 1. Both the exhaust port 4 and the feed port 5 are connected to the liquid phase component filling cavity 3.

[0029] Multiple first filter bags 6 are fixedly disposed inside the bulk detonation warhead casing 1. The outer side of the first filter bags 6 is fixedly connected to the inner wall of the side of the bulk detonation warhead casing 1, and the inner side of the first filter bags 6 extends inward along the radial direction. Multiple first filter bags 6 located on the same vertical plane are evenly distributed at equal intervals along the axial direction of the bulk detonation warhead casing 1, and multiple first filter bags 6 located on the same horizontal plane are evenly distributed at equal intervals along the circumferential direction of the bulk detonation warhead casing 1.

[0030] Multiple second filter bags 7 are fixedly installed on the central drug column 2. The inner side of the second filter bags 7 is fixedly connected to the outer wall of the side of the central drug column 2, and the outer side of the second filter bags 7 extends outward in the radial direction. Multiple second filter bags 7 located on the same vertical plane are evenly distributed at equal intervals along the axial direction of the central drug column 2, and multiple second filter bags 7 located on the same horizontal plane are evenly distributed at equal intervals along the circumferential direction of the central drug column 2.

[0031] Multiple first filter mesh bags 6 and multiple second filter mesh bags 7, located on the same vertical plane, are staggered within the liquid phase component filling cavity 3. The space within the first filter mesh bags 6 and the second filter mesh bags 7 is the solid phase component filling cavity 8. The surfaces of the first filter mesh bags 6 and the second filter mesh bags 7 have mesh-like pores, which connect the liquid phase component filling cavity 3 and the solid phase component filling cavity 8.

[0032] As a specific embodiment, both the first filter mesh bag 6 and the second filter mesh bag 7 are woven from polytetrafluoroethylene (PTFE) thread. The manufacturing and use process of the first filter mesh bag 6 and the second filter mesh bag 7 is as follows: First, PTFE thread is used to weave a mesh fabric with mesh pores. Then, the mesh fabric is sewn into a flat, round bag. A solid fuel filling port needs to be reserved on the bag. After the solid fuel components are filled, the bag is sealed.

[0033] In this embodiment, polytetrafluoroethylene (PTFE) material has the following advantages: on the one hand, since PTFE does not react chemically with liquid fuel, it is protected from corrosion; on the other hand, the density of PTFE is close to that of the liquid fuel components, and the PTFE filter bag can be suspended in the bulk detonation warhead casing 1, thus avoiding the movement of the center of mass caused by its movement.

[0034] As a specific embodiment, the diameter of the polytetrafluoroethylene wire is 0.2 mm.

[0035] In this embodiment, if the diameter of the PTFE wire is too small, its insufficient strength will cause it to break under overload when the warhead casing 1 is launched, leading to leakage of solid fuel components and failure of the filter-type anti-settling device. If the diameter of the PTFE wire is too large, it will occupy too much space, reducing the filling space for liquid fuel components and resulting in insufficient liquid fuel components and decreased explosive power of the warhead. Therefore, this invention, through theoretical calculations, collective discussion with experienced personnel, and decomposition of the above problems, conducted separate experimental evaluations of each module, ultimately determined that a PTFE wire diameter of 0.2–0.4 mm can avoid all the above problems, fully demonstrate the design advantages of this invention, fully realize its functions, and effectively solve the problems.

[0036] As a specific embodiment, the maximum diameter of the mesh pores on the surface of the first filter bag 6 and the second filter bag 7 is 5 micrometers.

[0037] In this embodiment, the first filter mesh bag 6 and the second filter mesh bag 7 act as filters. Solid fuel components cannot pass through the mesh pores of the filter mesh bag and flow out, but liquid fuel components can pass through the mesh pores of the filter mesh bag and flow into the liquid component filling cavity 3. This ensures that the solid fuel components are fixed in a certain area and prevents them from settling, while also ensuring that the solid fuel components and liquid fuel components are mixed together.

[0038] As a specific embodiment, both the vent hole 4 and the feed hole 5 are circular holes, and the inner diameter of the feed hole 5 is larger than the inner diameter of the vent hole 4.

[0039] As an optional and specific solution in this embodiment, the bulk detonation warhead casing 1 includes a casing body, both the top and bottom of which are open. A top cover is detachably mounted on the top of the casing body, and a bottom cover is detachably mounted on the bottom of the casing body. The liquid phase component filling cavity 3 is formed by the casing body, the top cover, and the bottom cover. An internal thread for mounting the top cover is provided inside the top of the casing body, and an external thread matching the internal thread is provided outside the top cover. Similarly, an external thread matching the internal thread is provided outside the bottom cover. The assembly of the casing body, the top cover, and the bottom cover is achieved through this threaded structure.

[0040] As an optional and specific solution in this embodiment, the main body of the housing and the lower end cover of the housing are an integrated structure, and the upper end cover of the housing is detachably installed on the top of the main body of the housing.

[0041] The method of using the filter-type anti-settling device of the present invention specifically includes the following steps:

[0042] Step 1: Load solid fuel components and assemble the device:

[0043] Solid fuel components are loaded into the first filter bag 6 and the second filter bag 7. The first filter bag 6 is then fixedly connected to the main body of the casing, and the second filter bag 7 is fixedly connected to the central propellant 2. The central propellant 2 is fixedly connected to the lower end cover of the casing, and the upper end cover of the casing is installed at the top of the main body of the casing, thus completing the assembly of the first filter bag 6, the second filter bag 7, the central propellant 2, and the bulk detonation warhead casing 1.

[0044] Step 2, filling with liquid fuel components:

[0045] Liquid fuel components are injected through the feed hole 5 at the bottom of the bulk detonation warhead casing 1. During the injection process, the liquid surface of the liquid fuel components moves from bottom to top at a speed of 0.3 mm / s. Air in the liquid component filling cavity 3 is discharged through the exhaust hole 4 at the top of the bulk detonation warhead casing 1. After the liquid fuel components fill the liquid component filling cavity 3, they will enter the solid component filling cavity 8 through the mesh pores on the surface of the first filter bag 6 and the second filter bag 7, and gradually mix with the solid fuel components to form a solid-liquid mixed fuel.

[0046] The working principle of the filter-type anti-settling device of the present invention is as follows:

[0047] The fuel inside the bulk detonation warhead casing 1 is a solid-liquid mixture, i.e., a mixture of solid and liquid fuel components. Under gravity, these two components separate, affecting the center of gravity and thus ballistic accuracy. Furthermore, it affects the fuel distribution ratio for maximizing explosive power, thus impacting the overall yield. This invention places the solid fuel component in a first mesh bag 6 and a second mesh bag 7. The solid fuel component can only move within the mesh bags, and both the first and second mesh bags 7 are fixed inside the bulk detonation warhead casing 1, distributed circumferentially from top to bottom. Because the solid fuel component is uniformly fixed inside the bulk detonation warhead casing 1, even if it moves a certain distance, the impact on the center of gravity is significantly reduced, mitigating the stratification of the solid-liquid mixture and preventing any impact on ballistic accuracy. Liquid fuel components can enter the interior of the filter bag through the mesh pores on its surface and mix with solid fuel components. After mixing, air between solid fuel components can be discharged, and the mixing of solid and liquid fuel components can prevent agglomeration. Under the detonation drive of the subsequent central explosive charge 2, solid and liquid fuel components move outward simultaneously and mix during the movement, reaching the ratio with the maximum explosive power.

[0048] The liquid fuel component enters from the lower end of the bulk detonation warhead casing 1 and moves upwards until it fills the liquid component filling cavity 3. The purpose is to completely expel the air from the liquid component filling cavity 3, maximizing space utilization. The rising speed of the liquid fuel component's surface needs to be controlled at 0.3 mm / s. If the speed is too fast, the air between the solid fuel components cannot be effectively expelled by the liquid fuel component and is easily retained inside the liquid component filling cavity 3, resulting in a reduced fuel load and decreased explosive power. If the speed is too slow, time is wasted, and given the volatility of the fuel, prolonged time also leads to fuel waste. Experiments have shown that a rising speed of 0.3 mm / s for the liquid component's surface effectively expels air while maintaining efficiency.

[0049] Verification of the effect of Example 1:

[0050] Four filter-type anti-settlement devices from Example 1 were fabricated and filled with a solid-liquid phase mixed fuel. These four devices were then placed vertically, upside down, horizontally, and tilted, respectively. After ten days, the center of mass of each device was measured. The deviation of the center of mass was compared with the theoretical design value, and the difference was within 3 cm, which is within an acceptable range. After detonating the five warheads, the explosive power of each reached the design value, demonstrating that the present invention can fully demonstrate the explosive power of a bulk detonation warhead.

[0051] Example 2:

[0052] This embodiment provides a filter-type anti-settling device. The structure of this device is basically the same as that of Embodiment 1, except that the diameter of the polytetrafluoroethylene wire is 0.4 mm.

[0053] Verification of the effect of Example 2:

[0054] Four filter-type anti-settlement devices from Example 2 were fabricated and filled with a solid-liquid phase mixed fuel. These four devices were then placed vertically, upside down, horizontally, and tilted, respectively. After ten days, the center of mass of each device was measured. The deviation of the center of mass was compared with the theoretical design value; the difference was within 3 cm, which is within an acceptable range. After detonating the five warheads, the explosive power of each reached the design value, demonstrating that the present invention can fully demonstrate the explosive power of a bulk detonation warhead.

Claims

1. A filter-type anti-settlement device, comprising a shell of a bulk-detonation warhead (1), characterized in that, It also includes filter mesh bags; The body detonation warhead shell (1) is a hollow cylindrical structure and a rotating body. The axis of rotation of the body detonation warhead shell (1) is perpendicular to the ground. A central propellant column (2) is coaxially arranged at the center of the body detonation warhead shell (1). The central propellant column (2) is a cylindrical structure. The top end of the central propellant column (2) is connected to the top surface of the body detonation warhead shell (1), and the bottom end of the central propellant column (2) is connected to the bottom surface of the body detonation warhead shell (1). The space enclosed by the body detonation warhead shell (1) around the central propellant column (2) is a liquid phase component filling cavity (3). The liquid phase component filling cavity (3) is a circular cylindrical structure. An exhaust hole (4) is opened on the top surface of the body detonation warhead shell (1), and a feed hole (5) is opened on the bottom surface of the body detonation warhead shell (1). Both the exhaust hole (4) and the feed hole (5) are connected to the liquid phase component filling cavity (3). The body detonation warhead housing (1) is provided with a plurality of first filter mesh bags (6). The outer side of the first filter mesh bags (6) is fixedly connected to the inner wall of the side of the body detonation warhead housing (1). The inner side of the first filter mesh bags (6) extends inward along the radial direction. The plurality of first filter mesh bags (6) located on the same vertical plane are evenly distributed at equal intervals along the axial direction of the body detonation warhead housing (1). The plurality of first filter mesh bags (6) located on the same horizontal plane are evenly distributed at equal intervals along the circumferential direction of the body detonation warhead housing (1). The central drug column (2) is provided with a plurality of second filter mesh bags (7). The inner side of the second filter mesh bags (7) is fixedly connected to the outer wall of the side of the central drug column (2), and the outer side of the second filter mesh bags (7) extends outward along the radial direction. The plurality of second filter mesh bags (7) located on the same vertical plane are evenly distributed at equal intervals along the axial direction of the central drug column (2), and the plurality of second filter mesh bags (7) located on the same horizontal plane are evenly distributed at equal intervals along the circumferential direction of the central drug column (2). Multiple first filter mesh bags (6) and multiple second filter mesh bags (7) located on the same vertical plane are staggered in the liquid phase component filling cavity (3); The space inside the first filter mesh bag (6) and the second filter mesh bag (7) is a solid phase component filling cavity (8). The surfaces of the first filter mesh bag (6) and the second filter mesh bag (7) have mesh pores, which connect the liquid phase component filling cavity (3) and the solid phase component filling cavity (8).

2. The filter-type anti-settling device as described in claim 1, characterized in that, The first filter bag (6) and the second filter bag (7) are woven from polytetrafluoroethylene yarn.

3. The filter-type anti-settling device as described in claim 2, characterized in that, The diameter of the polytetrafluoroethylene wire is 0.2 to 0.4 mm.

4. The filter-type anti-settling device as described in claim 1, characterized in that, The maximum diameter of the mesh pores on the surface of the first filter bag (6) and the second filter bag (7) is 5 micrometers.

5. The filter-type anti-settling device as described in claim 1, characterized in that, The method of using the filter-type anti-settling device includes the following process: the solid fuel component is loaded into the first filter mesh bag (6) and the second filter mesh bag (7), and then the filter-type anti-settling device is assembled; the liquid fuel component is injected from the feed hole (5) at the bottom of the body detonation warhead shell (1). During the injection process, the liquid surface of the liquid fuel component moves from bottom to top, and the liquid surface of the liquid fuel component rises at a speed of 0.3 mm / s.

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