A product collection apparatus and method for electrically controlled solid propellants

Abstract

This invention discloses a product collection device and method for electrically controlled solid propellants, comprising a base and a sealed box. The bottom of the sealed box is open and sealed to the base. The base has an mounting groove for the electrically controlled solid propellant, and a lower electrode plate is disposed at the bottom of the mounting groove. It also includes an upper electrode plate, the bottom surface of which has a contact portion with the top surface of the electrically controlled solid propellant. Both the upper and lower electrode plates are connected to a power supply module. The top of the sealed box has an outlet, which is connected to a product container via a pipeline. The pipeline or product container is connected to a vacuum pump. The invention also includes a controller, which is connected to the upper electrode plate, the lower electrode plate, and the vacuum pump. This invention mounts the electrically controlled solid propellant on the base and designs an outlet at the top of the sealed box. The upper and lower electrode plates can be connected to positive and negative electrodes respectively according to collection requirements, thereby collecting combustion products from the positive / negative electrodes under different voltages as needed.

Description

Technical Field

[0001] This invention belongs to the field of product collection technology for electrically controlled solid propellants, and particularly relates to a product collection device and method for electrically controlled solid propellants. Background Technology

[0002] Electrically Controlled Solid Propellant (ECSP) is a novel energetic material that burns upon ignition, extinguishes upon power failure, and has an adjustable burning rate in real time. It combines the high energy density of solid propellants with the controllability of liquid propellants. Its core advantages are multiple ignitions, adjustable thrust, and safety insensitivity.

[0003] The combustion products of electrically controlled solid propellants (ESPs) are primarily gaseous. Since ESP combustion depends on an applied voltage, external contact suction devices are highly susceptible to discharge due to excessive contact with the electrodes, affecting the electric field distribution and potentially interrupting combustion. Therefore, traditional quenching or supersonic probe methods cannot meet the requirements for collecting combustion products from ESPs, hindering deeper research into combustion characteristics and modeling. Furthermore, because the electrolysis of ESPs is controlled by the DC electric field provided by the positive and negative electrodes, the electrolytic reactions at different electrodes differ, resulting in uneven product release – another characteristic distinguishing ESPs from traditional solid propellants. Establishing methods for collecting electrolytic products from different electrodes and under different voltage input conditions is crucial for understanding the combustion modes and building ESP combustion models. Summary of the Invention

[0004] The purpose of this invention is to provide a product collection device and method for electrically controlled solid propellants, so as to collect the combustion products of the positive and negative electrodes of the electrically controlled solid propellant under different input voltages.

[0005] The present invention adopts the following technical solution: a product collection device for electrically controlled solid propellants, comprising a base and a sealed box, wherein the bottom of the sealed box is open and the open is sealed to the base; The base has an installation slot for electrically controlled solid propellant, and a lower electrode plate is installed at the bottom of the installation slot; It also includes an upper electrode plate, the bottom surface of which has a contact portion with the top surface of the electronically controlled solid propellant; Both the upper and lower electrode plates are connected to the power supply module; The top of the sealed box has an air outlet, which is connected to the product container via a pipe. The pipeline or product container is connected to a vacuum pump; It also includes a controller, which is connected to the upper electrode plate, the lower electrode plate and the air pump respectively.

[0006] Another technical solution of the present invention: a product collection method for electrically controlled solid propellants, using the above-mentioned product collection device for electrically controlled solid propellants, includes the following steps: Place the electronically controlled solid propellant in the mounting slot of the base, so that the bottom surface of the electronically controlled solid propellant contacts the lower electrode plate, and press the upper electrode plate onto the upper end of the electronically controlled solid propellant and make contact. Seal the connection between the sealed box and the base; The power supply module is turned on to supply power to the upper and lower electrode plates. When the electrolytic voltage between the upper and lower electrode plates reaches the preset value, the electronically controlled solid propellant burns, and the vacuum pump is turned on to suck the combustion products into the product container.

[0007] The beneficial effects of this invention are: This invention installs an electrically controlled solid propellant on a base, which is in contact with both the upper and lower electrode plates, and designs an air vent at the top of the sealed box. The upper and lower electrode plates can be connected to the positive and negative electrodes respectively according to the collection requirements, so that the combustion products of the positive / negative electrodes can be collected under different voltages as needed. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of a product collection device for electrically controlled solid propellants according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the cooperation between the sealing box and the base in an embodiment of the present invention; Figure 3 This is a schematic diagram of the interior of the sealed box body in an embodiment of the present invention; Figure 4 This is a schematic diagram of a product collection method for electrically controlled solid propellants according to an embodiment of the present invention.

[0009] Wherein: 100. Sealed box body; 110. Gas outlet; 120. Gas conduit; 200. Base; 300. Elastic support; 400. Upper electrode plate; 410. Wire; 500. Electrically controlled solid propellant; 600. Lower electrode plate; 700. Product container; 800. Vacuum pump; 900. Power supply module; A. Controller. Detailed Implementation

[0010] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0011] Solid propellant combustion products are a crucial research area in solid rocket motors, significantly impacting their performance. Specifically, solid propellant combustion products refer to the gaseous components formed by the combustion of propellant during ignition, which flow out through the solid rocket motor nozzle to provide thrust.

[0012] Currently, traditional solid rocket motor combustion product collection methods mainly include quenching, supersonic probe, and refined optical diagnostic methods. The collected product results mainly serve research on propellant physicochemical properties, combustion evolution mechanisms and models, two-phase flow numerical simulation, and combustion efficiency optimization methods.

[0013] Electro-controlled solid propellants are a new type of solid propellant in which electrolytically combustable fuel is added to the solid propellant to achieve combustion when electricity is applied and extinguishing when electricity is cut off. They do not have the characteristic of self-sustaining combustion and require a continuous voltage to maintain the combustion state. Moreover, their combustion products are mainly gaseous.

[0014] However, electrically controlled solid propellant (ECSP) is a novel energetic material that burns upon energization, extinguishes upon de-energization, and has a real-time adjustable burning rate. Its combustion process relies on a DC electric field formed by an applied voltage. Due to the combustion characteristics of ECSP, traditional contact-type suction devices are prone to discharge if placed too close to the electrodes, thus interfering with the electric field distribution and causing the ECSP combustion to be interrupted. Furthermore, the electrolytic reactions occurring at different electrodes in ECSP result in uneven product release, making it difficult to achieve independent and precise collection of products from both positive and negative electrode regions using traditional methods, thus hindering in-depth research on related combustion characteristics.

[0015] This invention discloses a product collection device for electrically controlled solid propellants, such as... Figure 1 and Figure 2 As shown, the device includes a base 200 and a sealed box 100. The bottom of the sealed box 100 is open and sealed to the base 200. The base 200 has a mounting groove for an electrically controlled solid propellant 500, and a lower electrode plate 600 is provided at the bottom of the mounting groove. It also includes an upper electrode plate 400, the bottom surface of which has a contact portion with the top surface of the electrically controlled solid propellant 500. Both the upper electrode plate 400 and the lower electrode plate 600 are connected to a power supply module 900. The top of the sealed box 100 has an air outlet 110, which is connected to a product container 700 via a pipeline. The pipeline or product container 700 is connected to a vacuum pump 800. The device also includes a controller A, which is connected to the upper electrode plate 400, the lower electrode plate 600, and the vacuum pump 800.

[0016] The present invention mounts an electrically controlled solid propellant 500 on a base, which is in contact with the upper electrode plate 400 and the lower electrode plate 600. An air vent 110 is designed on the top of the sealed box 100. The upper electrode plate 400 and the lower electrode plate 600 can be connected to the positive and negative electrodes respectively according to the collection requirements, so that the combustion products of the positive and negative electrodes can be collected under different voltages as needed.

[0017] The sealed housing 100 can be a square hollow shell with an opening on one side, the outline of which can match the outer diameter of the base 200. The sealed housing 100 can be made of insulating material, or its surface can be treated with insulation to prevent leakage or breakdown under a high-voltage electric field. A sealing gasket (such as a rubber gasket) can be provided at the connection between the sealed housing 100 and the base 200 to ensure that a sealed chamber is formed after they are engaged, preventing external air from entering or internal products from leaking out. In this invention, the sealed housing 100 serves as the main accommodating space, its function being to provide a stable environment isolated from external interference for the electrolytic combustion of the electrically controlled solid propellant 500, and to cooperate with the base 200 to define the flow channel space for product collection.

[0018] The base 200 can be a flat plate structure with a mounting groove for positioning at its center. The shape and size of this mounting groove can be set according to the shape of the electrically controlled solid propellant 500, for example, it can be a circular groove, a square groove, etc., and this embodiment does not make any special limitations on this. The material of the base 200 can also be an insulating material or a rigid material with an insulating surface treatment. In terms of functional positioning, the base 200 not only supports the electrically controlled solid propellant 500 and the lower electrode plate 600, but also forms a complete sealed system through a sealed connection with the sealed box body 100. The depth and diameter of the mounting groove can be set according to the actual situation, for example, the depth can be 2mm and the diameter can be 10mm to ensure the stability of the propellant placement.

[0019] The lower electrode plate 600 is disposed at the bottom of the mounting groove. It can be a conductive metal plate, made of copper, aluminum, or other metals with good conductivity. The shape of the lower electrode plate 600 can be adapted to the bottom of the mounting groove, for example, it can be disc-shaped. The lower electrode plate 600 is in direct contact with the bottom surface of the electrically controlled solid propellant 500, and is used to conduct the electrical energy provided by the power supply module 900 to the bottom of the propellant. In this embodiment, the lower electrode plate 600 and the upper electrode plate 400 together constitute two electrodes for applying a DC electric field. Their role in the overall technical solution is to establish an electric field path through the electrically controlled solid propellant 500.

[0020] The upper electrode plate 400 refers to another conductive metal plate, the bottom surface of which has a contact portion with the top surface of the electrically controlled solid propellant 500. This contact portion can be a surface contact to ensure uniform current distribution. The shape, size, and material of the upper electrode plate 400 can be the same as or different from the lower electrode plate 600; for example, it can also be a copper disc with a thickness of 1 mm and a diameter of 10 mm. The functional positioning of the upper electrode plate 400 in this design is to cooperate with the lower electrode plate 600 to clamp the electrically controlled solid propellant 500 and apply a potential to its top surface, thereby forming an electric field inside the propellant to drive the electrolytic reaction. The relative positional relationship between the upper electrode plate 400 and the lower electrode plate 600 can be maintained by a mechanical support structure to ensure stable contact during combustion.

[0021] The power supply module 900 refers to the power supply device, whose output terminals are electrically connected to the upper electrode plate 400 and the lower electrode plate 600, respectively. The function of the power supply module 900 is to provide controllable DC voltage and current to the electrically controlled solid propellant 500. Its output voltage range, current upper limit, and other parameters can be set according to the specific model and electrolytic characteristics of the electrically controlled solid propellant 500; for example, it can provide a maximum output capacity of 300V and 5A. The connection between the power supply module 900 and the electrodes can be achieved through wires, which pass through pre-drilled holes in the side wall of the sealed housing 100 and are insulated and sealed.

[0022] The vent 110 is located at the top of the sealed housing 100 and can be a through-hole structure for connecting the interior of the sealed chamber with external pipelines. The vent 110 can be located at the center or off-center of the top surface of the sealed housing 100; this embodiment does not impose any particular limitation on this. The vent 110 serves as a channel interface for the discharge of combustion products, guiding the gas flow to the product collection system.

[0023] The product container 700 can be a sealed container for storing the collected gas, such as a gas collection bag, gas cylinder, or vacuum sampling bag. The product container 700 is connected to the gas outlet 110 via a pipeline, and its function is to receive and temporarily store the combustion products of the electrically controlled solid propellant extracted by the vacuum pump 800 for subsequent component analysis. The capacity of the product container 700 can be set according to the amount of gas produced in a single experiment, for example, it can be 5 mL or more; this embodiment does not impose any special limitation on this.

[0024] A vacuum pump 800 is connected to the pipeline or product container 700, and can be a miniature vacuum pump or a gas flow driven device. The function of the vacuum pump 800 is to generate negative pressure under the action of a control signal, drawing gas from the sealed housing 100 into the product container 700 through the outlet 110 and the pipeline. The pumping flow rate of the vacuum pump 800 can be set according to actual needs, for example, it can be 1 mL / s. The connection between the vacuum pump 800 and the pipeline can be a flexible hose connection or a threaded connection, ensuring the airtightness of the connection.

[0025] Controller A can be a microprocessor, a single-chip microcomputer, or a programmable logic controller (PLC). Controller A is electrically connected to the upper electrode plate 400, the lower electrode plate 600, and the vacuum pump 800. In this embodiment, the function of controller A is to monitor the voltage signal between the upper electrode plate 400 and the lower electrode plate 600 in real time, and control the start and stop of the vacuum pump 800 based on the monitoring results. Specifically, controller A can preset an electrolysis voltage threshold. When the voltage between the electrodes reaches this threshold, it determines that the electrolytic solid propellant 500 has started electrolytic combustion, and then outputs a control signal to start the vacuum pump 800; when the voltage is detected to be lower than the preset threshold (indicating the end of combustion), it controls the vacuum pump 800 to stop working. This linkage achieves precise matching between the product collection timing and the combustion process, avoiding ineffective vacuuming or impurity contamination.

[0026] The core innovation of this invention lies in constructing a sealed chamber consisting of a sealed box 100 and a base 200, and logically binding the electrode voltage monitoring with the operation of the vacuum pump 800 through a controller A. This design utilizes the voltage-sensitive ignition characteristics of the electrically controlled solid propellant 500 to transform traditional passive collection into active response collection, which avoids the interference of contact sampling on the electric field distribution and ensures effective extraction only during the product generation stage.

[0027] The working process and principle of this embodiment are as follows: First, the electrically controlled solid propellant 500 is placed in the mounting groove of the base 200, with its bottom surface in contact with the lower electrode plate 600, and the upper electrode plate 400 is pressed against the top surface of the propellant. Then, the sealed box 100 is fastened onto the base 200 to form a sealed space. The power supply module 900 applies DC voltage to the upper and lower electrode plates, and the controller A monitors the voltage changes between the electrodes in real time. When the voltage rises to the preset electrolysis threshold, the electrically controlled solid propellant 500 undergoes electrolytic combustion to produce gaseous products. At this time, the controller A immediately drives the vacuum pump 800 to work, and the generated gas is sucked into the product container 700 through the gas outlet 110. When the combustion ends and the voltage drops, the controller A cuts off the power to the vacuum pump 800, completing one collection process.

[0028] In a preferred embodiment, the base 200 is made of insulating ceramic material, with a circular positioning groove 2 mm deep and 10 mm in diameter machined in the center. The lower electrode plate 600 is a copper disc 1 mm thick and 10 mm in diameter, embedded in the bottom of the positioning groove. The electronically controlled solid propellant 500 to be tested is a cylinder 10 mm in diameter and 6 mm high, placed on the lower electrode plate 600. The upper electrode plate 400 is also a copper disc, with its lower surface in close contact with the top surface of the propellant, and its upper surface supported by a support column (not shown in the figure, but may be located inside the box) on the top of the sealed box 100 to maintain pressure. The sealed box 100 is a square insulating box with an outlet 110 at the center of the top, connected to a silicone hose via a stainless steel conduit. The other end of the hose is connected to a 5 mL gas collection bag as a product container 700. A vacuum pump 800 is connected in series in the hose circuit, with a rated flow rate of 1 mL / s. Controller A uses an embedded microcontroller. Its voltage acquisition terminal is connected in parallel to the lead wires of the upper and lower electrode plates, and its control output terminal is connected to the switching circuit of the vacuum pump 800. At the start of the experiment, the power supply module 900 outputs adjustable DC power from 0-300V. When controller A detects that the voltage reaches 220V and the current reaches 0.5A, the electrolysis conditions, it automatically turns on the vacuum pump 800; when the voltage drops below 50V, it automatically turns off the vacuum pump 800.

[0029] Because of the fully enclosed structure consisting of a sealed box 100 and a base 200, and because the electrodes directly hold the propellant instead of contacting it through an external probe, discharge interference caused by proximity to the electrodes in traditional sampling devices is avoided, ensuring the continuity and stability of the combustion of the electrically controlled solid propellant 500. The introduction of controller A for real-time monitoring of the electrode voltage and its linkage with the vacuum pump 800 ensures that collection only begins when combustion products are actually generated, preventing ambient gases from entering the product container 700 during non-combustion phases and improving the purity and accuracy of the collected samples. The overall device has a simple structure and a high degree of automation, enabling independent and directional collection of combustion products under different voltage input conditions, providing reliable experimental data support for the study of the combustion mechanism and model establishment of electrically controlled solid propellants.

[0030] In one embodiment, such as Figure 3 As shown, the upper electrode plate 400 is a plate-shaped body with a through-hole for venting. The upper electrode plate 400 can refer to a conductive component located above and in direct contact with the electrically controlled solid propellant 500, and its main form can be a plate-shaped body. The shape of this plate-shaped body can be set according to actual conditions, for example, it can be a circular plate, a square plate, or a polygonal plate. This embodiment does not impose any special limitations on this, as long as it can achieve good electrical contact.

[0031] The upper electrode plate 400 can be made of copper, aluminum, or other metals with good electrical conductivity. In the overall technical solution, the upper electrode plate 400 serves as one end of the power supply circuit, conducting current from the power supply module 900 to the top surface of the electrically controlled solid propellant 500. Simultaneously, it acts as a mechanical clamping component, working with the lower electrode plate 600 to fix the electrically controlled solid propellant 500 within the mounting groove.

[0032] The vent hole refers to a through-hole structure that penetrates the thickness of the upper electrode plate 400, connecting the bottom surface (i.e., the surface in contact with the electrically controlled solid propellant 500) and the top surface of the upper electrode plate 400. The function of the vent hole is to provide an escape channel for the gases generated during the combustion of the electrically controlled solid propellant 500. When the electrically controlled solid propellant 500 undergoes electrolytic combustion under the influence of an electric field between the upper and lower electrodes, the generated gaseous products are produced from the top surface of the propellant. If the upper electrode plate 400 is a solid structure, the gas will not be able to escape smoothly, leading to localized pressure buildup, which may affect the uniformity of combustion or damage the sealed environment. By providing a through-hole, the combustion products can pass vertically upwards through the upper electrode plate 400 into the internal space of the sealed housing 100, and then be guided to the vent 110. The vent hole, together with other parts of the upper electrode plate 400, constitutes a composite functional structure that is both conductive and gas-conducting, achieving coordinated operation of electrical connection and gas flow.

[0033] Regarding the specific implementation of the exhaust holes, their number, diameter, and arrangement can be set according to the actual combustion product generation rate and flow resistance requirements. For example, the number of exhaust holes can be one or more; when there are multiple holes, they can be arranged in an array, such as a rectangular array or a circular array, or distributed along the circumference or irregularly. This embodiment does not impose any special limitations on this. The cross-sectional shape of the exhaust holes can be circular, elliptical, square, or other geometric shapes. In some optional embodiments, the ratio of the total flow cross-sectional area of ​​the exhaust holes to the total area of ​​the upper electrode plate 400 can be set according to the actual situation to ensure that sufficient gas flow channels are provided while maintaining sufficient current density. In addition, the inner wall of the exhaust holes can be smoothed to reduce gas flow resistance, or specific surface treatments can be performed as needed to withstand the erosion of high-temperature combustion gases.

[0034] Specifically, in this embodiment, the upper electrode plate 400 is tightly attached to the top surface of the electrically controlled solid propellant 500 through its bottom surface, forming a good electrical contact interface. When the power supply module 900 is working, current flows into the electrically controlled solid propellant 500 through the upper electrode plate 400. As the propellant undergoes electrolytic combustion, high-temperature and high-pressure gases are generated at the contact surface, and these gases then flow upward through the exhaust holes on the upper electrode plate 400. Since the exhaust holes are vertically connected, the gas can smoothly leave the combustion area and enter the upper chamber of the sealed housing 100, avoiding pressure fluctuations or poor contact caused by gas stagnation between the upper electrode plate 400 and the propellant. This process ensures the continuity and stability of the combustion process, and also creates conditions for the subsequent collection of products into the product container 700 through the exhaust port 110 and pipelines.

[0035] In a preferred embodiment, the upper electrode plate 400 is made of a copper plate with a thickness of 1 mm to 5 mm, and its shape is a disc with a diameter consistent with the outer diameter of the electrically controlled solid propellant 500. Several circular vent holes with a diameter of 0.5 mm to 2 mm are uniformly machined on this disc, arranged in a concentric array. During assembly, the upper electrode plate 400 is placed on top of the electrically controlled solid propellant 500, ensuring that its bottom surface is in full contact with the top surface of the propellant. When the device is started, voltage is applied between the upper and lower electrode plates, the propellant begins to burn, and the generated gas immediately escapes upward through the aforementioned circular vent holes, flows through the sealed housing 100, and is finally drawn into the product container 700 by the vacuum pump 800. Throughout this process, the upper electrode plate 400 remains conductive, and the presence of the vent holes effectively prevents problems such as electrode separation from the propellant or increased contact resistance caused by gas accumulation.

[0036] Through the above technical solution, the gas generated by the combustion of the electrically controlled solid propellant 500 can be discharged from the combustion surface in a timely and smooth manner due to the through-hole vent on the upper electrode plate 400, thus avoiding interference with combustion stability caused by excessively high local gas pressure. At the same time, this structure ensures that the upper electrode plate 400 can conduct current normally to maintain electrolytic combustion, while also taking into account the function of gas conduction, thereby improving the efficiency and integrity of product collection and ensuring the accuracy of experimental data.

[0037] In one embodiment, a gas conduit 120 is provided between the exhaust port and the outlet 110. The gas conduit 120 can be a tubular structure disposed inside the sealed housing 100 or penetrating the top wall of the sealed housing 100, used to connect the exhaust port on the upper electrode plate 400 with the outlet 110 at the top of the sealed housing 100. The material of the gas conduit 120 can be set according to actual conditions, for example, it can be stainless steel, aluminum alloy, or other corrosion-resistant and high-temperature-resistant metal materials, or it can be hard plastic or ceramic materials that have undergone insulation treatment; this embodiment does not impose any special limitations on this. The inner diameter and length of the gas conduit 120 can be adaptively adjusted according to the flow rate of the combustion products of the electrically controlled solid propellant 500 and the internal space of the sealed housing 100 to ensure smooth airflow without generating excessive flow resistance.

[0038] In the overall technical solution, the gas conduit 120 functions as a directional flow channel. Specifically, when the electrically controlled solid propellant 500 is ignited between the upper and lower electrode plates and combustion products are generated, the high-temperature, high-pressure gas first passes through multiple arrayed exhaust holes on the upper electrode plate 400. Without the gas conduit 120, these gases discharged from different locations might undergo disordered diffusion or turbulent mixing in the top space of the sealed container 100, causing some products to remain in dead corners or fail to be extracted in time. By setting the gas conduit 120, its upper end is connected to or connected to the exhaust port 110, and its lower end extends to the area near the exhaust hole of the upper electrode plate 400, thereby integrating the dispersed exhaust paths. The gas conduit 120 forms a cooperative relationship with the exhaust holes of the upper electrode plate 400, so that the gas passing through the exhaust holes can be quickly captured and merged into the interior of the gas conduit 120, and then guided along the axial direction of the conduit to the exhaust port 110, and then enters the pipeline and product container 700 connected to the outside of the exhaust port 110. This connection method forms a continuous airflow channel from the exhaust port to the gas conduit 120, the gas outlet 110, the pipeline, and the product container 700, realizing the centralized transportation of combustion products.

[0039] Specifically, during the combustion of the electrically controlled solid propellant 500, the generated gaseous products move upward under the influence of pressure difference, penetrating the vent holes on the upper electrode plate 400. At this time, the gas conduit 120, located above the vent holes, acts as the only low-resistance channel, guiding the escaping gas. Regardless of the distribution of the vent holes on the upper electrode plate 400, the gas flowing through each vent hole is confined into the cavity of the gas conduit 120. Under the negative pressure generated by the vacuum pump 800, the airflow in the gas conduit 120 accelerates towards the outlet 110 and is drawn into the product container 700 via an external pipeline. During this process, the gas conduit 120 effectively prevents the gas from spreading extensively at the top of the sealed container 100, reduces the mixing of products with residual air inside the container, and ensures that the collected sample mainly originates from the direct combustion products of the electrically controlled solid propellant 500.

[0040] As a preferred embodiment, assuming that 15 vent holes with a diameter of 1 mm are evenly distributed on the upper electrode plate 400, the gas conduit 120 can be a stainless steel round tube with an inner diameter of 5 mm and a height of 12.5 mm. This stainless steel round tube is vertically fixed to the center of the top of the inner wall of the sealed box 100, with its bottom opening facing the central area of ​​the upper electrode plate 400 or covering most of the projected area of ​​the vent holes, and its top end sealed to the outlet 110 at the top of the sealed box 100. When the controller A detects that the voltage has reached the electrolysis threshold and starts the vacuum pump 800, the electrically controlled solid propellant 500 begins to burn. The generated gas passes through the 15 vent holes and is immediately drawn into the inlet of the lower gas conduit 120, flowing upwards along the tube wall and finally being discharged through the outlet 110. If it is necessary to collect products from a specific area, the bottom position of the gas conduit 120 can also be adjusted according to the distribution of the vent holes, or a multi-branch confluence structure can be adopted, as long as the gas discharged from the vent holes can be guided to the outlet 110.

[0041] The above technical solution enables the collection and directional transport of combustion products that were originally dispersed by setting a gas conduit 120 between the exhaust port and the outlet 110. This reduces the disorderly diffusion and residence time of the gas in the sealed box 100, thereby improving the efficiency and purity of product collection and facilitating the subsequent accurate analysis of the combustion characteristics of the electronically controlled solid propellant.

[0042] In one embodiment, an elastic support 300 is provided between the top of the upper electrode plate 400 and the inner wall of the sealing housing 100. The elastic support 300 can refer to a buffer or force-applying component disposed between the surface of the upper electrode plate 400 facing away from the electrically controlled solid propellant 500 and the inner top wall of the sealing housing 100. In this embodiment, the elastic support 300 functions to provide an adjustable axial preload to the upper electrode plate 400 to compensate for gaps caused by machining tolerances, assembly errors, or thermal expansion and dimensional changes of the electrically controlled solid propellant 500 during combustion. The elastic support 300 forms a mating relationship with the upper electrode plate 400 and the sealed box 100: one end abuts against or is connected to the top of the upper electrode plate 400, and the other end abuts against or is fixed to the inner wall (usually the inner top wall) of the sealed box 100. Through its own elastic deformation capability, it always applies an elastic force to the upper electrode plate 400 in the direction of the electrically controlled solid propellant 500, thereby ensuring that the bottom surface of the upper electrode plate 400 and the top surface of the electrically controlled solid propellant 500 maintain a tight and stable electrical contact. This mating allows the upper electrode plate 400 to adaptively conform to the propellant surface even without an external rigid locking mechanism, avoiding uneven electric field distribution or open circuits caused by poor contact. The specific implementation of the elastic support 300 can be set according to the actual situation, for example, it can be a compression spring, a bellows, a disc spring, or an elastic foam metal block, etc.; its material can be stainless steel spring steel or copper-beryllium alloy, etc., and this embodiment does not make any special limitations on this. As a possible variation, the elastic support 300 may also be an assembly consisting of multiple small springs evenly distributed circumferentially to provide a more uniform support force; or, the elastic support 300 may be an integrally formed elastic metal sheet with a wave-like or arched structure, utilizing its structural elasticity to provide restoring force.

[0043] Specifically, after the device is assembled, the elastic support 300 is in a compressed or pre-compressed state, and its stored elastic potential energy is converted into a continuous thrust on the upper electrode plate 400. During the energized combustion of the electrically controlled solid propellant 500, if the propellant undergoes slight contraction or expansion, or if the device is subjected to external vibration, the elastic support 300 can promptly undergo corresponding expansion and contraction deformation, dynamically adjusting the force on the upper electrode plate 400 to maintain a constant contact pressure between the two or allow it to fluctuate within a preset range. This ensures that the current output from the power supply module 900 can be stably transmitted to the electrically controlled solid propellant 500 through the upper electrode plate 400, ensuring the continuity and stability of the electrolytic combustion process. Simultaneously, the elastic support 300 also acts as a buffer, absorbing the impact energy that may be generated during combustion, preventing the upper electrode plate 400 from shifting or being damaged due to severe vibration, thus protecting the delicate electrode structure and the propellant sample.

[0044] In a preferred embodiment, when assembling the product collection device, the lower electrode plate 600 is first placed in the mounting groove of the base 200, and the electrically controlled solid propellant 500 is placed on the lower electrode plate 600. Then, the upper electrode plate 400 is placed over the top of the electrically controlled solid propellant 500. Next, several cylindrical compression springs are selected as elastic support members 300, and one end of these springs is welded or snapped into the reserved groove or mounting hole on the top of the upper electrode plate 400, or placed directly on the top of the non-conductive area of ​​the upper electrode plate 400. Finally, the sealing box 100 is placed on the base 200 and sealed. At this time, the inner top wall of the sealing box 100 presses down on the other end of the elastic support member 300, causing the spring to compress and deform, thereby pushing the upper electrode plate 400 tightly against the surface of the electrically controlled solid propellant 500. In this state, controller A starts the power supply module 900, and the current forms a circuit through the lower electrode plate 600, the electrically controlled solid propellant 500, and the upper electrode plate 400, initiating the combustion of the propellant. At the same time, no matter how small the surface of the propellant changes, the elastic support 300 can compensate for the position deviation in real time to ensure continuous and good electrical contact until the combustion ends.

[0045] Through the above technical solution, the upper electrode plate 400 can obtain a continuous elastic preload by setting an elastic support 300 between the upper electrode plate 400 and the inner wall of the sealing box 100. This solves the problem of poor contact or stress concentration caused by rigid connection and achieves the technical effect of ensuring stable and reliable electrical contact between the upper electrode plate 400 and the electronically controlled solid propellant 500, adapting to dimensional deviations and thermal deformation, and buffering vibration and impact.

[0046] In one embodiment, there is an axial safety clearance between the bottom end of the gas conduit 120 and the exhaust port. This axial safety clearance refers to the non-contact distance maintained vertically between the lower end face of the gas conduit 120 and the upper surface of the upper electrode plate 400 (i.e., the plane where the exhaust port outlet is located). The specific value of this clearance can be set according to actual conditions, for example, it can be 1mm, 2mm, or 5mm. This embodiment does not impose a special limitation on this, as long as it ensures smooth gas flow and avoids physical interference. The function of setting this axial safety clearance is to prevent the bottom end of the gas conduit 120 from directly contacting or being too close to the exhaust port outlet of the upper electrode plate 400. In the system linkage, when the electrically controlled solid propellant 500 burns to generate high-temperature, high-pressure gas and is ejected upwards through the exhaust port on the upper electrode plate 400, the airflow first diffuses and stabilizes in the buffer space formed by this axial safety clearance before being drawn into the gas conduit 120. This coordination allows the airflow ejected from the exhaust port to have a certain adjustment range before entering the gas duct 120, avoiding severe turbulence or pressure fluctuations caused by the airflow directly hitting the duct opening. It also prevents tiny solid particles or condensate droplets ejected with the airflow from directly impacting and adhering to the inlet edge of the gas duct 120, thereby reducing the risk of duct blockage and ensuring the continuity and stability of the product collection process.

[0047] Specifically, during the energized combustion of the electrically controlled solid propellant 500, the combustion product gas escapes upwards through the exhaust port on the upper electrode plate 400. Due to the axial safety gap between the bottom end of the gas conduit 120 and the exhaust port, the ejected gas flow forms a brief free jet zone within this gap area, homogenizing the gas velocity distribution. Some larger particles fail to immediately change direction and enter the conduit due to inertia, or fall back under gravity. Meanwhile, the target gaseous product is smoothly drawn into the gas conduit 120 and transported to the product container 700 under the negative pressure generated by the vacuum pump 800. This process utilizes the flow field buffering effect created by the gap to achieve the initial effect of solid-gas separation and a smooth transition of the flow field.

[0048] In a preferred embodiment, the upper electrode plate 400 is assumed to be a 1mm thick copper plate with a uniformly distributed array of 1mm diameter exhaust holes. The gas conduit 120 is a 5mm inner diameter stainless steel round tube with a flat bottom end. During installation, by adjusting the compression of the elastic support 300 or directly setting the installation height of the inner top wall of the sealed box 100, a 3mm axial safety distance is maintained between the bottom end of the gas conduit 120 and the upper surface of the upper electrode plate 400. When the power supply module 900 applies voltage to ignite the electrically controlled solid propellant 500, the high-temperature gas is ejected from the exhaust holes. After being buffered by the 3mm distance, it is extracted by the pump 800 operating at a flow rate of 1mL / s through the gas conduit 120. During this process, even if a small amount of incompletely burned solid particles are ejected from the exhaust holes, the presence of this distance prevents them from directly blocking the conduit opening, ensuring the unobstructed collection channel.

[0049] Through the above technical solution, an effective physical isolation and flow field buffer is established between the gas conduit 120 and the exhaust port. Due to the setting of the axial safety distance, direct contact or close contact between the conduit opening and the exhaust port is avoided, thereby solving the channel blockage problem caused by solid residue accumulation or condensate adhesion. This improves the reliability and maintenance convenience of the device in repeated use, while optimizing the flow pattern of the gas entering the conduit and improving the efficiency and purity of product collection.

[0050] This invention also discloses a product collection method for electrically controlled solid propellants, using any of the product collection devices for electrically controlled solid propellants described above, such as... Figure 4 As shown, it includes the following steps: The electronically controlled solid propellant 500 is placed in the mounting groove of the base 200, so that the bottom surface of the electronically controlled solid propellant 500 contacts the lower electrode plate 600, and the upper electrode plate 400 is pressed on the upper end of the electronically controlled solid propellant 500 and in contact.

[0051] This step aims to establish a stable electrochemical combustion environment. The electrically controlled solid propellant 500 can refer to an energetic material that undergoes an electrolytic reaction under a direct current electric field to produce combustion gases; it is typically cylindrical or has a specific geometric shape. The base 200 is an insulating material or a flat plate with an insulating surface, and its mounting grooves are used to position the electrically controlled solid propellant 500 and the lower electrode plate 600. Both the lower electrode plate 600 and the upper electrode plate 400 are conductive plate-like bodies, such as copper disc electrodes, used to apply a high-voltage electric field to the electrically controlled solid propellant 500.

[0052] Specifically, the lower electrode plate 600 is placed at the bottom of the mounting groove of the base 200, and then the electrically controlled solid propellant 500 is smoothly placed into the mounting groove, ensuring that its bottom surface is fully in contact with the lower electrode plate 600 to form good electrical contact. Next, the upper electrode plate 400 is placed over the top surface of the electrically controlled solid propellant 500, and a certain pressure is applied to ensure that it is in close contact with the top surface of the propellant, forming a stacked structure of lower electrode-propellant-upper electrode. For example, when the electrically controlled solid propellant 500 is a cylinder with a diameter of 10 mm and a height of 6 mm, circular upper and lower electrode plates with the same outer diameter and a thickness of 1 mm are selected and placed coaxially aligned to ensure that the electric field is uniformly distributed inside the propellant. This close contact arrangement can effectively reduce contact resistance, ensuring that the voltage can be stably applied to both ends of the propellant when energized, and avoiding localized sparking or electric field distortion caused by poor contact.

[0053] Next, the sealed housing 100 is sealed to the base 200. This step is used to construct a sealed reaction chamber, preventing the leakage of combustion products and the entry of external air that could interfere with the collection results. The sealed housing 100 is a hollow shell with an opening on one side, the size of which matches the size of the base 200. The sealed connection can refer to the installation of a seal between the two mating surfaces or the formation of a well-sealed space through interference fit or other methods.

[0054] Specifically, after the upper electrode plate 400 is positioned, the open end of the sealed box 100 is placed over the base 200, so that the upper electrode plate 400 is located within the accommodating space inside the sealed box 100. Rubber gaskets or other elastic sealing materials can be pre-laid on the contact surfaces between the sealed box 100 and the base 200, and a sealed connection is achieved by bolt tightening or snap-locking. For example, a square sealed box can be used with a square base, and sealant can be applied to the contact surfaces around the perimeter or O-rings can be embedded to ensure a secure connection and no gas leakage channels. After this step is completed, the electrically controlled solid propellant 500, the upper electrode plate 400, and the lower electrode plate 600 are all enclosed within the sealed chamber formed by the sealed box 100 and the base 200, providing the necessary environmental conditions for the subsequent directional collection of combustion products and effectively preventing interference from external airflow on the combustion process and product composition.

[0055] Then, the power supply module 900 is turned on to supply power to the upper electrode plate 400 and the lower electrode plate 600. When the electrolytic voltage between the upper electrode plate 400 and the lower electrode plate 600 reaches the preset value, the electronically controlled solid propellant 500 is burned, and the vacuum pump 800 is turned on to suck the combustion products into the product container 700.

[0056] This step achieves automated coordinated control of combustion triggering and product collection. The power supply module 900 includes a DC power supply for providing adjustable high-voltage DC power to the upper and lower electrode plates. The preset value can refer to the critical voltage threshold required for the electrolytic combustion of the electrically controlled solid propellant 500, which is preset according to the material properties of the propellant. The vacuum pump 800 is a power component used to generate negative pressure to drive gas flow, and the product container 700 is used to store the collected combustion product gases. The controller A is electrically connected to both the power supply module 900 and the vacuum pump 800, and is used to monitor the voltage signals between the electrodes in real time and execute logic control.

[0057] Specifically, the power supply module 900 is activated, and the DC power supply begins to output DC voltage to the upper electrode plate 400 and the lower electrode plate 600. Controller A collects and monitors the voltage data between the two electrodes in real time. As the voltage gradually increases, when the monitored voltage value reaches the preset electrolysis voltage threshold, such as 220V, it indicates that the electrically controlled solid propellant 500 has met the electrolysis conditions and has begun to undergo a combustion reaction. At this time, controller A immediately outputs a control signal to start the vacuum pump 800. The suction force generated by the vacuum pump 800 rapidly draws the newly generated combustion products in the sealed container 100 into the product container 700 through the pipeline. For example, if the preset voltage threshold is set to 220V, when the controller detects that the voltage has risen to 220V, it immediately starts the vacuum pump with a flow rate of 1mL / s to ensure that the gases generated by combustion are captured as soon as possible. If combustion ends and the voltage drops below the preset threshold, the controller can control the vacuum pump to stop working to prevent the collection of gases from the non-combustion stage.

[0058] By linking the power supply module 900 with the vacuum pump 800, and using the voltage signal as the criterion for combustion initiation, a synchronous response of combustion upon reaching the voltage threshold and vacuuming upon combustion is achieved. This control strategy not only avoids the time delay of manual operation and prevents premature vacuuming of background air or delayed vacuuming from causing product escape, but also ensures that the collected gas samples originate purely from the electrolytic combustion process of the electronically controlled solid propellant, significantly improving the accuracy of product collection and the reliability of experimental data.

[0059] Through the synergistic effect of the above steps, automated and precise collection of combustion products from electrically controlled solid propellants is achieved. A stable electrolytic combustion environment is constructed by clamping the electrically controlled solid propellant 500 between upper and lower electrode plates and placing it within a sealed container 100. Furthermore, by using controller A to monitor the output voltage of the power supply module 900 in real time, and using the voltage reaching a preset value as the sole condition for triggering the vacuum pump 800, a direct causal relationship between the combustion state and the collection action is established. Based on this, the negative pressure flow field generated by the vacuum pump 800 is used to directionally transport the gaseous products generated during combustion to the product container 700. This voltage feedback-based control mechanism not only effectively solves the technical problem of traditional contact sampling easily interfering with the electric field distribution and causing combustion interruption, but also overcomes the deficiency of manual operation in accurately matching the combustion initiation time. Therefore, high-quality, high-purity combustion product samples can be obtained under different input voltage conditions, providing strong experimental support for in-depth research on the combustion characteristics of electrically controlled solid propellants and the establishment of accurate combustion models.

Claims

1. A product collection device for electrically controlled solid propellants, characterized in that, It includes a base (200) and a sealed box (100), the bottom of which is open and sealed to the base (200); The base (200) has a mounting groove for an electrically controlled solid propellant (500), and a lower electrode plate (600) is provided at the bottom of the mounting groove. It also includes an upper electrode plate (400), the bottom surface of which has a contact portion with the top surface of the electrically controlled solid propellant (500); The upper electrode plate (400) and the lower electrode plate (600) are both connected to the power supply module (900). The top of the sealed box (100) has an air outlet (110), which is connected to the product container (700) via a pipeline. The pipeline or product container (700) is connected to a vacuum pump (800). It also includes a controller (A), which is connected to the upper electrode plate (400), the lower electrode plate (600) and the air pump (800) respectively.

2. The product collection device for electrically controlled solid propellants as described in claim 1, characterized in that, The upper electrode plate (400) is a plate-shaped body with an exhaust hole that runs vertically through it.

3. The product collection device for electrically controlled solid propellants as described in claim 2, characterized in that, A gas conduit (120) is provided between the exhaust port and the outlet (110).

4. The product collection device for electrically controlled solid propellants as described in claim 2, characterized in that, The number of exhaust holes is multiple, and the multiple exhaust holes are arranged in an array.

5. A product collection device for electrically controlled solid propellants as described in claim 2 or 3, characterized in that, An elastic support (300) is provided between the top of the upper electrode plate (400) and the inner wall of the sealed box (100).

6. The product collection device for electrically controlled solid propellants as described in claim 3, characterized in that, There is an axial safety distance between the bottom end of the gas conduit (120) and the exhaust port.

7. A method for collecting products from electrically controlled solid propellants, characterized in that, Using a product collection device for electrically controlled solid propellants according to any one of claims 1-6, the method comprises the following steps: The electrically controlled solid propellant (500) is placed in the mounting groove of the base (200) so that the bottom surface of the electrically controlled solid propellant (500) contacts the lower electrode plate (600) and the upper electrode plate (400) is pressed on the upper end of the electrically controlled solid propellant (500) and in contact. The sealed box body (100) is sealed to the base (200); The power supply module (900) is turned on to supply power to the upper electrode plate (400) and the lower electrode plate (600). When the electrolytic voltage between the upper electrode plate (400) and the lower electrode plate (600) reaches a preset value, the electrically controlled solid propellant (500) is burned, and the vacuum pump (800) is turned on to suck the combustion products into the product container (700).

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