A short-duration, continuous, and stable gas-producing charge column and its preparation method

Abstract

This invention discloses a short-duration, continuous, and stable gas-producing charge column and its preparation method, belonging to the field of explosives technology. The invention includes: a thin-walled metal tube as a framework; a combustion material bonded to the inner and / or outer walls of the thin-walled metal tube; and ignition channels located at both ends of the thin-walled metal tube for pressure balance inside and outside the tube and uniform ignition of the combustion material. The combustion material is positioned so that its ends do not extend beyond the inner ends of the ignition channels. The charge column is configured to achieve increased, equal, or reduced combustion surfaces through the bonding of the combustion material to the thin-walled metal tube, thereby solving the problem that existing charge structures cannot meet the requirements of short-duration, continuous, and stable gas production in explosive devices.

Description

Technical Field

[0001] This invention relates to the field of explosives technology, specifically to a short-duration, continuous, and stable gas-generating charge and its preparation method. Background Technology

[0002] The gunpowder actuation device is mainly used to drive the target object to complete the throwing and separation at a certain speed. Its typical output curve is consistent with the ballistic theory of guns and cannons. The gas produced by the combustion of gunpowder is used to do external work (under ideal conditions such as adiabatic). As the piston stroke increases, the cavity decreases and the thrust decreases.

[0003] With the development of equipment, higher requirements have been placed on the stability of thrust output in pyrotechnic actuation devices, demanding that these devices achieve greater energy output with the smallest possible peak thrust. Therefore, with a constant stroke, the thrust output of the actuation device needs to be as stable as possible; traditional propellant loading configurations are no longer sufficient to meet these thrust requirements. To ensure the stable thrust output of the actuation device, the combustion gas production of the internal propellant must cover the entire motion process, and the combustion gas production rate must match the piston movement speed. That is, when the piston moves at a constant speed, the combustion gas production rate of the propellant remains stable; when the piston accelerates (decelerates), the combustion gas production rate of the propellant also increases (decelerates).

[0004] Researchers have already used rocket-grade double-base propellants as the main charge of the actuator to provide continuous gas production, and even adopted honeycomb structures to increase the combustion surface per unit mass to meet the requirements of high gas production in a short time for rocket actuators.

[0005] The working time of a push-type ignition actuation device is approximately 5~20ms, while the burning rate of the propellant is approximately (10~50)mm / s. To adapt to the working time of the ignition actuation device, the thinnest part of the propellant is less than 0.1mm. For the two common charging structures, the conventional columnar propellant has a small burning surface and a long burning time, which cannot adapt to the working time of the ignition actuation device of about 10ms. Moreover, the coating process is poor and the production cycle is long. Although the honeycomb propellant uses a honeycomb structure to increase the burning surface and can increase gas production, adapting to the short working time of the ignition actuation device of 10ms, it also results in a thin-walled structure in some parts of the propellant. This leads to poor resistance to ignition impact, easy breakage of the propellant, and abnormal output. In addition, due to the presence of multiple honeycomb structures, the gas production rate fluctuates greatly. Summary of the Invention

[0006] The purpose of this invention is to provide a short-term, continuous, and stable gas-producing charge column and its preparation method, so as to solve the problem that the existing charge structure cannot meet the short-term, continuous, and stable gas production requirements of pyrotechnic devices.

[0007] To solve the above problems, the present invention employs the following technical means:

[0008] A short-duration, continuous, and stable gas-producing charge column includes:

[0009] Thin-walled metal tubes serve as the framework;

[0010] Combustion material is bonded to the inner and / or outer wall of the thin-walled metal tube;

[0011] The ignition channel is located at both ends of the thin-walled metal tube and is used for pressure balance inside and outside the thin-walled metal tube and uniform ignition of the combustion material.

[0012] Wherein, the two ends of the combustion material are not more than the inner ends of the ignition channel, and the charge column is configured to achieve an increased, equal, or reduced combustion mode by bonding the combustion material with the thin-walled metal tube.

[0013] Preferably, the radial thickness of the fuel is 0.078 mm to 0.125 mm.

[0014] Furthermore, in the equal-area combustion mode, the combustion material includes an inner wall material and an outer wall material, which are respectively adhered to the inner wall and the outer wall of the thin-walled metal tube. The radial single-sided thickness of the inner wall material is 0.078mm~0.1mm, and the radial single-sided thickness of the outer wall material is 0.078mm~0.125mm.

[0015] Furthermore, in the enhanced combustion mode, the combustion material adheres only to the inner wall of the thin-walled metal tube, and the radial thickness of the combustion material on one side is 0.078mm~0.1mm.

[0016] Furthermore, in the reduced-surface combustion mode, the combustion material adheres only to the outer wall of the thin-walled metal tube, and the radial thickness of the combustion material on one side is 0.1mm~0.125mm.

[0017] The special structure of the charge column involved in this invention has the following beneficial effects when applied to pyrotechnic actuation devices:

[0018] By arranging the combustion material in different ways according to different gas production requirements, when the propellant column covers both the inner and outer walls of the thin-walled metal tube with adhesive combustion material, as the combustion material is consumed during combustion, the outer diameter of the outer combustion material decreases, and the burning surface of the outer combustion material gradually decreases, while the inner diameter of the inner combustion material increases, and the burning surface of the inner combustion material gradually increases, keeping the total burning surface constant, thus achieving uniform combustion and gas production in an equal-area combustion mode. When the propellant column only covers the inner wall of the thin-walled metal tube with adhesive combustion material, as the combustion material burns, the inner diameter of the combustion material on the inner wall of the thin-walled metal tube gradually increases, thus gradually increasing the burning surface of the combustion material, thus achieving an increased-area combustion mode and accelerating combustion and gas production. When the propellant column only covers the outer wall of the thin-walled metal tube with adhesive combustion material, as the combustion material burns, the outer diameter of the combustion material on the outer wall of the thin-walled metal tube gradually decreases, thus gradually reducing the burning surface, thus achieving a decreased-area combustion mode and accelerating combustion and gas production.

[0019] Using thin-walled metal tubes as the skeleton of the combustion material provides mechanical support for the entire charge column, ensuring good ignition impact resistance even with the arrangement of thin-walled combustion material, and preventing abnormal gas output caused by combustion material breakage. Moreover, the supporting effect of the thin-walled metal tubes on the combustion material can greatly improve the processing accuracy of the combustion material. In addition, the parts of the thin-walled metal tubes that are not covered by the combustion material can quickly conduct heat during combustion, preheating the inside of the combustion material, reducing the fluctuation of gas production rate during combustion. In the equal-area combustion mode, the preheating effect of the thin-walled metal tubes on the inner and outer wall materials makes the rate of increase of the burning surface of the inner wall material and the rate of decrease of the burning surface of the outer wall material more similar, resulting in more uniform gas production in the equal-area combustion mode.

[0020] Meanwhile, flame transmission channels are provided at both ends of the thin-walled metal tube to facilitate pressure balance and uniform ignition inside and outside the tube. This ensures the synchronous combustion of the inner and outer wall materials in the equal-area combustion mode; in the increased-area combustion mode, it quickly establishes a flame transmission path from the outside to the inside, avoiding combustion delay; and in the reduced-area combustion mode, it prevents the formation of a vacuum in the inner cavity when the outer layer of burning material is burning, thus affecting combustion stability.

[0021] In addition, a method for preparing the aforementioned short-duration, continuous, stable gas-producing charge column includes the following steps:

[0022] S1. Design the combustion surface, combustion time, and combustion surface change rate of the combustion material according to the combustion requirements, and determine the inner and outer diameters of the thin-walled metal tube;

[0023] S2. Process the thin-walled metal tube and the solid or hollow combustion material respectively, so that the inner or outer diameter of the combustion material and the outer or inner diameter of the thin-walled metal tube form a clearance fit;

[0024] S3. Apply flame-retardant adhesive evenly to the bonding surface between the fuel material and the thin-walled metal tube, and allow it to cure after bonding;

[0025] S4. Clamp the thin-walled metal tube and machine the combustion material to maintain the radial thickness of the combustion material on one side at 0.078~0.125mm.

[0026] Preferably, in step S4, the machining includes cutting the inner or outer diameter of the fuel material;

[0027] In step S3, the coating thickness of the flame retardant adhesive is uniformly controlled to be 0.05~0.1mm. During the curing process, a clamp is used to prevent the combustion material from shifting. The flame retardant adhesive is an organosilicon resin adhesive or ceramicized silicone rubber that can withstand short-term temperatures of 500℃ and above.

[0028] Furthermore, when applied to the surface-enhancing combustion mode, the process includes: first processing solid combustion material and bonding it to the inner wall of a thin-walled metal tube; after curing, machining the inner diameter of the solid combustion material to the design value, so that the radial thickness of the combustion material is 0.078~0.1mm on one side.

[0029] Furthermore, when applied to the equal-area combustion mode processing, the process includes: first bonding a solid inner wall material to the inner wall of the thin-walled metal tube and processing the inner diameter, then bonding an outer wall material to the outer wall of the thin-walled metal tube and processing the outer diameter, so that the radial single-sided thickness of the inner wall material is 0.078mm~0.1mm and the radial single-sided thickness of the outer wall material is 0.078mm~0.125mm.

[0030] Furthermore, when applied to the reduced-surface combustion mode processing, the process includes: first processing hollow combustion material, so that the hollow combustion material is fitted and bonded to the outer wall of the thin-walled metal tube, and the outer diameter of the hollow combustion material is larger than the designed outer diameter. After curing, the outer diameter of the combustion material is processed to the designed value using machining, so that the radial single-sided thickness of the combustion material is 0.1mm~0.125mm.

[0031] The preparation method involved in this application has the following beneficial effects:

[0032] By using a thin-walled metal tube as the combustion material skeleton and bonding it to the combustion material with flame-retardant adhesive, an integrated structure is formed. During processing, the thin-walled metal tube is first formed, then the combustion material is bonded to the thin-walled metal tube, and finally the combustion material is precision-machined. This ensures the processing accuracy and stability of the combustion material; ensures stable combustion of the combustion material; ensures synchronous combustion loss of the inner and outer wall materials in the equal-area combustion mode; and ensures stable gas production in both the increased-area and decreased-area combustion modes. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the isoplanar combustion mode structure of the present invention.

[0034] Figure 2This is a schematic diagram of the increased combustion mode structure of the present invention.

[0035] Figure 3 This is a schematic diagram of the reduced-surface combustion mode structure of the present invention.

[0036] Figure 4 This is a schematic diagram of the thin-walled metal tube of the present invention.

[0037] Among them, 1-thin-walled metal tube, 2-combustion material, 3-fire transmission channel, 4-inner wall material, and 5-outer wall material. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0040] It should be noted that, unless otherwise specified, the embodiments and features described in this invention can be combined with each other.

[0041] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0042] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0043] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0044] Please refer to Figures 1 to 4 As shown, a short-duration, continuous, and stable gas-producing charge column includes:

[0045] Thin-walled metal tube 1 serves as the framework;

[0046] In this embodiment, the thin-walled metal tube 1 can be selected as the material when the short working time of 10ms is set according to the combustion requirements. The inner diameter is 10mm, the outer diameter is 14mm, and the length is 15mm.

[0047] The thin-walled metal tube 1 not only avoids the ignition impact and fragmentation phenomenon that occurs when the burning material 2 is in a thin-walled state and adapts to the short-term operation time of the fire-working device, but also allows for high-precision machining of the burning material 2 inside the thin-walled metal tube 1 by clamping the thin-walled metal tube 1, thereby accurately controlling the thickness of the burning material 2.

[0048] Combustion material 2 is bonded to the inner wall and / or outer wall of the thin-walled metal tube 1;

[0049] The ignition channel 3 is located at both ends of the thin-walled metal tube 1 and is used for pressure balance inside and outside the thin-walled metal tube 1 and uniform ignition of the combustion material 2.

[0050] Wherein, the two ends of the combustion material 2 are not more than the inner ends of the ignition channel 3, and the charge column is configured to achieve an increased surface, equal surface, or reduced surface combustion mode through the bonding combination of the combustion material 2 and the thin-walled metal tube 1.

[0051] The primary function of the ignition channel 3 is to connect the internal and external spaces of the thin-walled metal tube 1, ensuring the effective propagation of flame and combustion gases during ignition. The ignition channel 3 ensures synchronous combustion of the combustion materials 2 inside and outside the thin-walled metal tube 1, preventing pressure buildup or uneven combustion, thus meeting the high thrust stability requirements of the ignition actuator. The ignition channel 3 also avoids the risk of propellant breakage caused by localized high pressure inside the thin-walled metal tube 1, and ensures the precise realization of the combustion surface change rate of the combustion materials 2 under the increased, equal, and reduced surface combustion modes, matching the gas production rate with the piston movement speed.

[0052] In addition, the radial thickness of the combustion material 2 is 0.078 mm to 0.125 mm on each side.

[0053] In this embodiment, the combustion material 2 has three settings, corresponding to the increased surface combustion mode, the equal surface combustion mode, and the reduced surface combustion mode, respectively.

[0054] First, please combine Figure 1 As shown, in the equal-area combustion mode, the combustion material 2 includes an inner wall material 4 and an outer wall material 5, which are respectively adhered to the inner wall and outer wall of the thin-walled metal tube 1. The radial single-sided thickness of the inner wall material 4 is 0.078mm~0.1mm, and the radial single-sided thickness of the outer wall material 5 is 0.078mm~0.125mm.

[0055] Thus, during ignition, with the ignition channel 3 in place, the inner wall material 4 and the outer wall material 5 can be ignited simultaneously, resulting in synchronized changes in the combustion surfaces of the inner wall material 4 and the outer wall material 5. Furthermore, the ignition channel 3 ensures that the internal and external pressures of the thin-walled metal tube 1 are rapidly maintained in dynamic equilibrium during combustion, reducing the impact of localized pressure on the stability of combustion surface consumption and preventing unstable combustion or structural damage due to pressure differences. Moreover, in the equal-surface combustion mode, the mechanical support of the thin-walled metal tube 1 effectively prevents deformation of the inner wall material 4 and the outer wall material 5 due to uneven stress during combustion, ensuring the geometric stability of the inner wall material 4 and the outer wall material 5 during combustion.

[0056] Secondly, please combine Figure 2 As shown, in the surface-enhancing combustion mode, the combustion material 2 adheres only to the inner wall of the thin-walled metal tube 1, and the radial thickness of the combustion material 2 is 0.078mm~0.1mm on one side.

[0057] Thus, in the increased combustion mode, the ignition channel 3 allows the ignition flame to quickly enter the thin-walled metal tube 1, thereby reducing the start-up response in the increased combustion mode. Moreover, with the help of the ignition channel 3, the pressure inside the thin-walled metal tube 1 can be kept stable, avoiding the impact of pressure fluctuations inside the thin-walled metal tube 1 on the gas production stability of the combustion material 2.

[0058] In addition, please combine Figure 3 As shown, in the reduced-surface combustion mode, the combustion material 2 adheres only to the outer wall of the thin-walled metal tube 1, and the radial thickness of the combustion material 2 is 0.1mm~0.125mm on one side.

[0059] Thus, in the reduced-area combustion mode, the ignition channel 3 also serves to maintain a dynamic balance of pressure inside and outside the thin-walled metal tube 1. However, in the reduced-area combustion mode, its function of ensuring the dynamic balance of pressure inside and outside the thin-walled metal tube 1 is to ensure that the thin-walled metal tube 1 itself will not deform due to the internal and external pressure difference, thereby affecting the geometric configuration of the combustion material 2 and thus affecting the gas production stability and the reduction rate of combustion area.

[0060] Furthermore, in this embodiment, the reason for the difference in the range of radial single-sided thickness when the combustion material 2 is placed on the inner wall and the outer wall of the thin-walled metal tube 1 is that when the combustion material 2 is placed on the inner wall of the thin-walled metal tube 1, it is to ensure that the combustion material 2 on the inner wall can quickly establish combustion, while leaving space for the growth of the combustion surface; when the combustion material 2 is placed on the outer wall of the thin-walled metal tube 1, in order to provide a smoother combustion surface decay curve and avoid a sudden drop in the gas generation rate, and since the combustion material 2 placed on the outer wall directly bears the ignition impact, a thicker thickness is required to ensure the structural integrity when bearing the ignition impact and to prevent the geometric structure of the combustion material 2 from cracking during combustion.

[0061] Furthermore, regarding the preparation of the aforementioned charge column, a method for preparing the aforementioned short-duration, continuous, and stable gas-generating charge column includes the following steps:

[0062] S1. Design the combustion surface, combustion time, and combustion surface change rate of the combustion material 2 according to the combustion requirements, and determine the inner and outer diameters of the thin-walled metal tube 1;

[0063] S2. Process the thin-walled metal tube 1 and the solid or hollow combustion material 2 respectively, so that the inner or outer diameter of the combustion material 2 and the outer or inner diameter of the thin-walled metal tube 1 form a clearance fit.

[0064] S3. Apply flame-retardant adhesive evenly to the bonding surface between the combustible material 2 and the thin-walled metal tube 1, and allow it to cure after bonding;

[0065] S4. Clamp the thin-walled metal tube 1 and perform mechanical processing on the combustion material 2.

[0066] Preferably, in step S4, the machining includes cutting the inner or outer diameter of the fuel 2;

[0067] In step S3, the thickness of the flame retardant adhesive is uniformly controlled to be 0.05~0.1mm. During the curing process, a clamp is used to prevent the combustion material 2 from shifting. The flame retardant adhesive is an organosilicon resin adhesive or ceramicized silicone rubber that can withstand short-term temperatures of 500℃ and above.

[0068] Furthermore, when applied to the surface-enhancing combustion mode, the process includes: first processing solid combustion material 2 and bonding it to the inner wall of thin-walled metal tube 1; after curing, machining the inner diameter of solid combustion material 2 to the design value, so that the radial single-sided thickness of combustion material 2 is 0.078~0.1mm.

[0069] Furthermore, when applied to the equal-area combustion mode processing, the process includes: firstly bonding a solid inner wall material 4 to the inner wall of the thin-walled metal tube 1 and processing the inner diameter, then bonding an outer wall material 5 to the outer wall of the thin-walled metal tube 1 and processing the outer diameter, so that the radial single-sided thickness of the inner wall material 4 is 0.078mm~0.1mm and the radial single-sided thickness of the outer wall material 5 is 0.078mm~0.125mm.

[0070] Furthermore, when applied to the reduced-surface combustion mode processing, the process includes: first processing the hollow combustion material 2, so that the hollow combustion material 2 is fitted and bonded to the outer wall of the thin-walled metal tube 1, and the outer diameter of the hollow combustion material 2 is larger than the designed outer diameter. After curing, the outer diameter of the combustion material 2 is processed to the designed value by machining, so that the radial single-sided thickness of the combustion material 2 is 0.1mm~0.125mm.

[0071] Therefore, in this embodiment, when bonding the fuel material 2 to the thin-walled metal tube 1, flame-retardant adhesive is used to bond the fuel material 2 to the thin-walled metal tube 1. This ensures that the thin-walled metal tube 1 and the fuel material 2 do not separate under ignition impact, and prevents the flame from being conducted through the bonding surface, which could lead to abnormal combustion of the fuel material 2. This ensures that the burning surface of the fuel material 2 changes regularly during the combustion process, and that the gas production of the fuel material 2 is stable.

[0072] The following will illustrate this with specific engineering examples.

[0073] First, based on the product structure and working characteristics, the burning surface, burning time, and burning surface change rate (increase or decrease) of the combustion material 2 are designed, thereby determining the inner and outer diameters of the thin-walled metal tube 1. During processing, the thin-walled metal tube 1 and the solid or thick-walled combustion material 2 are processed separately. The inner diameter (or outer diameter) of the combustion material 2 is matched with the outer diameter (inner diameter) of the thin-walled metal tube 1 as needed (small clearance fit). Then, flame-retardant adhesive is evenly applied to the bonding surface between the combustion material 2 and the thin-walled metal tube 1, and the combustion material 2 is bonded and cured to the thin-walled metal tube 1. Finally, the thin-walled metal tube 1 is clamped, and the combustion material 2 is machined until the specified dimensions are achieved. The flame-retardant adhesive can be a short-time 500℃ or higher resistant silicone resin or ceramicized silicone rubber.

[0074] For uniform combustion and gas production, an equal-surface combustion mode is adopted. In this mode, both the inner and outer walls of the thin-walled metal tube 1 are covered with thin-walled combustion material 2, namely inner wall material 4 and outer wall material 5. As the combustion material 2 is consumed during combustion, the outer diameter of the outer wall material 5 decreases, while the inner diameter of the inner wall material 4 increases, thus keeping the total combustion surface constant. At the same time, the ignition channels 3 set at both ends of the thin-walled metal tube 1 facilitate the pressure balance inside and outside the thin-walled metal tube 1 and uniform ignition.

[0075] For example, based on the combustion requirements of a certain product, the working time is set to a short time of 10ms. The material of the thin-walled metal tube 1 can be selected from 1Cr11Ni2W2MoV, 30CrMnSiA, etc., with an inner diameter of φ10mm, an outer diameter of φ14mm, and a length standard of (15±0.1)mm.

[0076] For conditions requiring increased gas production, an enhanced combustion surface structure is adopted. Enhanced combustion involves bonding and processing the combustion material 2 only on the inner wall of the thin-walled metal tube 1. The dimensions of the combustion material 2 can be designed as follows: inner diameter φ9.8mm, outer diameter φ10mm. During production, the thin-walled metal tube 1 is processed first, followed by the processing of a solid combustion material 2 with an outer diameter of φ10mm. After processing, the outer diameter of the solid combustion material 2 is bonded to the inner diameter of the thin-walled metal tube 1 with flame-retardant adhesive and cured. After curing, the end of the thin-walled metal tube 1 is clamped, and the inner diameter of the combustion material 2 is processed according to the inner diameter φ9.8mm. In actual operation, the radial thickness of the combustion material 2 on one side is (0.078~0.1)mm, and the working time is approximately (7.8~10)ms. Under this condition, the initial combustion surface is 461.58mm. 2 Final combustion surface 471mm 2 ;

[0077] For the deceleration and gas production conditions, a reduced-surface combustion structure is adopted. Reduced-surface combustion involves bonding and machining the combustion material 2 only to the outer wall of the thin-walled metal tube 1. The dimensions of the combustion material 2 can be designed as follows: inner diameter φ14mm, outer diameter φ14.2mm. During production, the thin-walled metal tube 1 is machined first, followed by machining a hollow combustion material 2 with an inner diameter of φ14mm and an outer diameter of φ15mm. After rough machining of the outer diameter of the combustion material 2, the inner diameter of the hollow combustion material 2 is bonded to the outer diameter of the thin-walled metal tube 1 with flame-retardant adhesive and cured. After curing, the thin-walled metal tube 1 is clamped, and the outer diameter of the combustion material 2 is machined to φ14.2mm. In actual operation, the radial thickness of the combustion material 2 on one side is (0.1~0.125)mm, the working time is approximately (10~12.5)ms, and the length of the combustion material 2 can be adjusted to 10.56mm. Under this condition, the initial combustion surface is approximately 473.2mm. 2 The final combustion surface is approximately 464 mm. 2 ;

[0078] For uniform gas production, an equal-surface combustion structure is adopted. Compared to increasing / decreasing surface combustion, equal-surface combustion involves bonding and processing combustion material 2 both inside and outside the thin-walled metal tube 1. The dimensions of combustion material 2 can be designed as follows: Inner wall material 4: inner diameter φ9.8mm, outer diameter φ10mm; Outer wall material 5: inner diameter φ14mm, outer diameter φ14.2mm. During production, the thin-walled metal tube 1 is processed first, followed by the inner wall material 4 with an outer diameter of φ10mm. After processing, the outer diameter of the inner wall material 4 is bonded to the inner diameter of the thin-walled metal tube 1 with flame-retardant adhesive and cured. Then, the inner diameter is processed to φ9.8mm. Then, a hollow outer wall material 5 with an outer diameter of φ15mm and an inner diameter of φ14mm is processed. After processing, its inner diameter is bonded to the outer diameter of the thin-walled metal tube 1 with flame-retardant adhesive and cured. After curing, the outer diameter of the outer wall material 5 is processed to φ14.2. The lengths of the inner wall material 4 and the outer wall material 5 can be adjusted to 6.25mm. Under this condition, the initial burning surface is approximately 471.1mm. 2 The final combustion surface area is approximately 471.4 mm. 2 .

[0079] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A short-duration, continuous, and stable gas-producing charge column, characterized in that, Short-duration ignition actuation devices with an operating time of 5~20ms include: Thin-walled metal tube (1) serves as the framework; Combustion material (2) is bonded to the inner wall and / or outer wall of the thin-walled metal tube (1); The ignition channel (3) is located at both ends of the thin-walled metal tube (1) and is used for pressure balance inside and outside the thin-walled metal tube (1) and uniform ignition of the combustion material (2); Wherein, the two ends of the combustion material (2) are not more than the inner ends of the ignition channel (3), and the charge column is configured to achieve a combustion mode of increased surface area, equal surface area or reduced surface area through the bonding combination of the combustion material (2) and the thin-walled metal tube (1).

2. The short-duration, continuous, stable gas-producing charge column according to claim 1, characterized in that, The radial thickness of the combustion material (2) is 0.078 mm to 0.125 mm.

3. A short-duration, continuous, stable gas-producing charge column according to claim 1 or 2, characterized in that, In the equal-area combustion mode, the combustion material (2) includes an inner wall material (4) and an outer wall material (5), which are respectively adhered to the inner wall and outer wall of the thin-walled metal tube (1). The radial single-sided thickness of the inner wall material (4) is 0.078mm~0.1mm, and the radial single-sided thickness of the outer wall material (5) is 0.078mm~0.125mm.

4. A short-duration, continuous, stable gas-producing charge column according to claim 1 or 2, characterized in that, In the surface-enhancing combustion mode, the combustion material (2) adheres only to the inner wall of the thin-walled metal tube (1), and the radial single-sided thickness of the combustion material (2) is 0.078mm~0.1mm.

5. A short-duration, continuous, stable gas-producing charge column according to claim 1 or 2, characterized in that, In the reduced-surface combustion mode, the combustion material (2) adheres only to the outer wall of the thin-walled metal tube (1), and the radial single-sided thickness of the combustion material (2) is 0.1mm~0.125mm.

6. A method for preparing a short-duration, continuous, stable gas-producing charge column as described in any one of claims 1 to 5, characterized in that, Includes the following steps: S1. Design the combustion surface, combustion time and combustion surface change rate of the combustion material (2) according to the combustion requirements, and determine the inner and outer diameters of the thin-walled metal tube (1); S2. Process the thin-walled metal tube (1) and the solid or hollow combustion material (2) respectively, so that the inner or outer diameter of the combustion material (2) and the outer or inner diameter of the thin-walled metal tube (1) form a clearance fit; S3. Apply flame-retardant adhesive evenly to the bonding surface between the combustible material (2) and the thin-walled metal tube (1), and cure after bonding; S4. Clamp the thin-walled metal tube (1) and perform mechanical processing on the combustion material (2).

7. The preparation method according to claim 6, characterized in that, In step S4, the machining includes cutting the inner or outer diameter of the fuel (2); In step S3, the coating thickness of the flame retardant adhesive is uniformly controlled to be 0.05~0.1mm. During the curing process, a clamp is used to prevent the displacement of the burning material (2). The flame retardant adhesive is an organosilicon resin adhesive or ceramicized silicone rubber that can withstand 500℃ and above for a short time.

8. The preparation method according to claim 6 or 7, characterized in that, When applied to the surface-enhancing combustion mode, the process includes: first processing solid combustion material (2) and bonding it to the inner wall of thin-walled metal tube (1), and then using machining to process the inner diameter of solid combustion material (2) to the design value, so that the radial single-sided thickness of combustion material (2) is 0.078~0.1mm.

9. The preparation method according to claim 6 or 7, characterized in that, When applied to the equal-area combustion mode processing, the process includes: first, bonding a solid inner wall material (4) to the inner wall of the thin-walled metal tube (1) and processing the inner diameter; then, bonding an outer wall material (5) to the outer wall of the thin-walled metal tube (1) and processing the outer diameter, so that the radial single-sided thickness of the inner wall material (4) is 0.078mm~0.1mm and the radial single-sided thickness of the outer wall material (5) is 0.078mm~0.125mm.

10. The preparation method according to claim 6 or 7, characterized in that, When applied to the reduced-surface combustion mode processing, the process includes: first processing the hollow combustion material (2), so that the hollow combustion material (2) is fitted and bonded to the outer wall of the thin-walled metal tube (1), and the outer diameter of the hollow combustion material (2) is greater than the designed outer diameter. After curing, the outer diameter of the combustion material (2) is processed to the designed value by mechanical processing, so that the radial single-sided thickness of the combustion material (2) is 0.1mm~0.125mm.

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