Solid propellant non-contact type novel pressurization curing device and method

Abstract

The invention discloses a non-contact type novel pressurizing and curing device for a solid propellant, and belongs to the technical field of solid power. The system comprises a gas supply system, a curing system and a data acquisition system, the gas supply system comprises a nitrogen cylinder, the nitrogen cylinder is fixed on a gas cylinder rack, a pressure reducing valve is mounted on the nitrogen cylinder, and the pressure reducing valve is used for adjusting the pressure in the nitrogen cylinder; the pressure reducing valve is connected with a metal hose A. The end, away from the pressure reducing valve, of the metal hose A is connected with the curing system and serves as an air inlet pipeline of the curing system. A metal hose B is connected to the metal hose A through a three-way pipe, and a hand valve is fixedly mounted at a pipe opening of the metal hose B; the top end of the curing system is connected with a data transmission line. The end, away from the curing system, of the data transmission line is connected with a data acquisition instrument of the data acquisition system. The device provides data support for researching the curing reaction heat of the grain, and is simple in structure, practical, reliable and high in safety.

Description

Technical Field

[0001] The present invention relates to the field of solid power technology, and in particular to a novel non-contact pressurized solidification device and method for solid propellant. Background Art

[0002] As the loading ratio of solid propellant rockets continues to increase, the thermal stress generated by the curing and cooling of the engine grain after formation also increases, significantly affecting the structural safety and interfacial bonding performance of the engine. To reduce the increased thermal stress in the grain caused by high loading and improve the molding quality of the grain interior and various bonding interfaces, a pressurized curing molding process is being used to mold high-loading grains. The basic process involves pouring the propellant slurry; then applying a certain pressure to the propellant slurry, causing the composite shell to expand and deform under the action of internal pressure; after the slurry solidifies at a constant temperature and pressure, the grain is cooled and depressurized in some way; after the pressure is released, the composite shell rebounds and shrinks due to unloading, which not only offsets some of the deformation caused by the curing and cooling shrinkage of the grain, but also creates a certain compressive preload at the bonding interface between the insulation layer, liner, and the grain, improving interfacial bonding performance. With the increasing demand for high loading ratios and structural safety of solid propellants in the aerospace and military sectors, improving the pressurized curing process technology for solid propellants is particularly important.

[0003] Usually during the pressurized curing process, high-pressure gas comes into direct contact with the slurry through the air inlet pipe, which not only increases the risk of accidents, but also has a certain negative impact on the structural integrity of the grain. In addition, the coordination of temperature and pressure during the pressurized curing process is particularly important for the successful completion of the pressurized curing test and the production of higher-performance grains. At the same time, the curing reaction is an exothermic process. During the curing process of the slurry, the heat generated by the slurry also has a certain impact on its own curing. Therefore, studying the heat generated by the slurry itself is crucial to realizing the temperature-pressure synergy technology in the pressurized curing process. In order to improve the structural integrity of solid propellant grains, improve the safety of pressurized curing tests, and meet the needs of studying the impact of the slurry's own heat generation on curing, it is necessary to design and manufacture a safe pressurized curing device and method that can avoid direct contact between the grain and high-pressure gas and can directly measure the temperature inside the grain.

[0004] Existing pressurized solidification devices generally pressurize high-pressure gas by directly contacting the drug slurry, and it is difficult to measure the temperature inside the drug column. In order to solve the above problems, the present invention proposes a new non-contact pressurized solidification device and method for solid propellant. Summary of the Invention

[0005] 1. Technical Problems to be Solved by the Present Invention

[0006] The object of the present invention is to provide a novel non-contact pressurized solidification device for solid propellant to solve the problems mentioned in the background technology.

[0007] 2. Technical solution

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] The present invention improves the traditional solid propellant pressurization and curing device, using a pressure transmission block to perform non-contact pressurization of high-pressure gas and slurry. By improving the upper cover of the pressurized tank and the pressure transmission block, a temperature thermocouple can be used to measure the internal temperature of the grain in real time, and a pressure sensor can be used to detect the pressure in the cavity in real time. Furthermore, a simple, safe and reliable experimental device is constructed, and a new non-contact solid propellant pressurization and curing device and method are proposed. Specifically, the following contents are included:

[0010] A novel non-contact pressurized solidification device for solid propellant, characterized in that the device includes an air supply system, a solidification system, and a data acquisition system, wherein:

[0011] The gas supply system includes a metal hose, a hose connector, a nitrogen cylinder, and a pressure reducing valve. The nitrogen cylinder is secured to a cylinder stand to prevent tipping and is threadedly connected to the pressure reducing valve. Adjusting the pressure reducing valve reduces the pressure within the cylinder, allowing the required high-pressure gas to flow to the curing system. The metal hose A, threadedly connecting the nitrogen cylinder to the curing system, serves as the curing system's air inlet.

[0012] The curing system includes an insulation box, a pressurized tank cover, an upper flange, a threading pressure cap A, a sealing silicone A, a threading base A, a pressurized tank cavity, a pressure transmission block, a cylinder body, a cylinder body bottom plate, a lower flange, a pressure sensor base, a threading pressure cap B, a sealing silicone B, a threading base B, a handle, a slurry, and a pressurized tank bottom plate; the pressurized tank cover is connected to the metal hose A through a hose connector, so that high-pressure nitrogen can enter the pressurized tank smoothly and steadily; the pressurized tank cavity is connected to the pressurized tank cover through upper flange bolts, and is connected to the pressurized tank bottom plate through lower flange bolts; The threading pressure cap A is connected to the threading base A by threads and sealed with sealing silicone A. Fine holes are left on the upper cover of the pressurized tank and the sealing silicone A for the temperature thermocouple to pass through the upper cover of the pressurized tank and enter the cavity; the threading pressure cap B is connected to the threading base B by threads and sealed with sealing silicone B. Fine holes are left on the pressure transmission block and the sealing silicone B for the temperature thermocouple to pass through the pressure transmission block to measure the temperature inside the medicine column; the handle is used to place the pressure transmission block more stably; the pressure sensor base is used to connect the pressure sensor to realize real-time measurement of pressure.

[0013] The data acquisition system includes a pressure data transmission line, a temperature data transmission line, a pressure sensor, a temperature thermocouple, and a data acquisition instrument; the pressure sensor is connected to the pressure sensor base through a threaded connection to measure the pressure in the pressurized chamber in real time, and transmit the measured data to the data acquisition instrument through the pressure data transmission line; the temperature thermocouple passes through the sealing silicone B, the pressurized tank cover, the sealing silicone A, and the fine holes left in the pressure transmission block in sequence to directly measure the temperature in the slurry, and transmit the measured data to the data acquisition instrument through the temperature data transmission line.

[0014] Preferably, a pressure relief plate is slidably installed above the inner wall of the pressurized tank cavity, a sealing ring is installed on the outer surface of the pressure relief plate, and a push rod is connected to the upper surface of the pressure relief plate to rotate evenly in a circle. The push rod is rotatably connected to a multi-function buffer block at one end away from the sealing ring, and the multi-function buffer block is slidably installed on the upper cover of the pressurized tank at one side away from the push rod, and a limiting ring is fixedly installed on the lower surface of the multi-function buffer block. A buffer spring is symmetrically fixedly installed on one side of the multi-function buffer block, and an arc-shaped splint is fixedly installed on the other side of the multi-function buffer block, and the buffer spring is fixedly connected to the limiting ring at one end away from the multi-function buffer block.

[0015] Preferably, in order to avoid direct contact of the slurry with high-pressure nitrogen, the pressurized curing test is carried out through a pressure transmission block, and the diameter of the pressure transmission block should match the inner diameter of the cylinder to prevent the slurry from leaking and the pressure transmission block from descending too quickly.

[0016] Optimally, the hose connector, wire cap A, sealing silicone, wire base A, pressure sensor base, wire cap B, sealing silicone B, and wire base B form a sealed structure. The hose connector ensures that high-pressure nitrogen can enter the curing tooling. The wire cap A, sealing silicone A, wire base A, wire cap B, sealing silicone B, and wire base B ensure that the temperature thermocouple passes through the holes in the sealing silicone B, the pressurized tank cover, sealing silicone A, and the pressure transmission block. The diameter of the temperature thermocouple should match the four holes to prevent air leakage. The pressure sensor is threaded onto the pressure sensor base to monitor the air pressure within the curing tooling.

[0017] Preferably, the pressure transmission block is provided with an annular groove at the middle height position and the upper part of the inner wall of the cylinder body for placing the ignition rubber sealing ring. The groove should match the diameter of the ignition rubber sealing ring, which not only prevents air leakage in the device, but also slows down the descent speed of the pressure transmission block, allowing the slurry to be pressurized at an ultra-slow rate, which is more conducive to the smooth implementation of the pressurized curing test. During the test, the pressure transmission block is simply flexibly positioned with the cylinder body through the annular ignition rubber sealing ring at the middle height. When no pressure is applied, the bottom surface of the pressure transmission block and the upper surface of the slurry are in a fitted state, preventing the slurry from being squeezed by the pressure transmission block and the inner wall of the cylinder due to excessive drug volume, which may cause a test accident. When pressurized, the ignition rubber sealing ring can be deformed, allowing the pressure transmission block to produce a small displacement, thereby pressurizing the slurry.

[0018] Preferably, a groove is provided on the upper edge of the pressurized tank cavity and the bottom plate of the pressurized tank for placing the ignition sealing ring. The groove should match the diameter of the ignition sealing ring, which not only improves the airtightness of the curing system, but also prevents drug leakage during the experiment, thereby improving the safety of the test.

[0019] Preferably, the temperature thermocouple passes through the sealing silicone B, the pressurized tank cover, the sealing silicone A, and the fine holes left in the pressure transmission block in sequence to directly measure the temperature inside the drug column during the entire pressurized curing process, and calculates the heat of the curing reaction through the difference between the drug column temperature and the set temperature of the insulation box.

[0020] A novel non-contact pressurized solidification device for solid propellant comprises the following steps:

[0021] S1. Assemble the test device. Connect the pressure tank cavity to the pressure tank cover through the upper flange bolts, and connect it to the pressure tank bottom plate through the lower flange bolts, and check the airtightness;

[0022] S2. Install and secure the gas source. Install the nitrogen cylinder on the anti-dumping cylinder stand;

[0023] S3. Install and secure the air inlet and outlet pipes, sensors, and data transmission lines. Metal hose A, threadedly connected to the nitrogen cylinder and the curing system, serves as the curing system's air inlet. Metal hose B, serving as the air outlet, is threadedly connected to metal hose A via a tee. A hand valve is also threadedly secured to the opening of metal hose B. The pressure sensor is threadedly connected to its base. The temperature thermocouple is inserted sequentially through the holes in the sealing silicone rubber B, the pressurized tank cover, the sealing silicone rubber A, and the pressure transmission block. The measured data is transmitted to the data acquisition instrument via the pressure and temperature data transmission lines. Turn on the data acquisition instrument and perform an initial signal inspection.

[0024] S4. Pour the slurry into the cylinder using a vacuum pouring method and seal the device;

[0025] S5. Open the nitrogen cylinder to supply gas and adjust the working state of the pressure reducing valve;

[0026] S6. Perform a pressurized curing test and collect temperature and pressure data in real time;

[0027] S7. After the test, close the pressure reducing valve, open the manual valve, and discharge the gas from the metal hose B. The manual valve is equipped with a venturi tube to limit the flow and achieve slow and safe exhaust.

[0028] 3. Beneficial effects

[0029] (1) Simple structure, safe and reliable: The test device of the present invention has only a dozen main parts, which are closely matched with each other and tightly connected. The whole device works reliably and is highly safe.

[0030] (2) Component modularity: The main components of the test device of the present invention can be easily disassembled, especially the pressure transmission block and the cylinder body, which can be removed to easily remove the residual medicine or residue inside so that the next test can be carried out as soon as possible;

[0031] (3) Ability to measure a variety of data: The device is equipped with temperature thermocouples and pressure sensors to measure the temperature and pressure rise, temperature and pressure maintenance, and temperature and pressure drop during the entire pressurized curing process in real time;

[0032] (4) Quantification of curing reaction heat: Measure the internal temperature of the slurry and make a difference with the set temperature of the insulation box. The heat released by the curing reaction of the drug column can be quantitatively calculated using the curing reaction heat formula;

[0033] (5) Collaborative visualization of temperature and pressure: Through real-time measurement of temperature thermocouples and pressure sensors, the processes of heating and pressure increase, temperature and pressure maintenance, and cooling and pressure reduction in the test are clearly visible on the data acquisition instrument. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic cross-sectional view (front view) of the main structure of a novel non-contact pressurized solidification device for solid propellants according to the present invention;

[0035] Figure 2 This is a schematic diagram of the macro layout of a novel non-contact pressurized solidification device for solid propellants according to the present invention;

[0036] Figure 3 It is a schematic diagram of the partial structure decomposition of the main structural section of the present invention;

[0037] Figure 4 For the present invention Figure 3 A in the middle is an enlarged schematic diagram;

[0038] Figure 5 This is the curing temperature and pressure curve measured by the data acquisition instrument mentioned in Example 1 of the present invention.

[0039] Figure: 1. Metal hose A; 2. Insulation box; 3. Hose connector; 4. Pressurized tank cover; 5. Upper flange; 6. Threading cap A; 7. Sealing silicone A; 8. Threading base A; 9. Pressurized tank cavity; 10. Pressure transmission block; 11. Cylinder body; 12. Cylinder body bottom plate; 13. Lower flange; 14. Pressure data transmission line; 15. Temperature data transmission line; 16. Pressure sensor; 17. Pressure sensor base; 18. Threading Pressure cap B; 19. Sealing silicone B; 20. Threading base B; 21. Handle; 22. Temperature thermocouple; 23. Medicine slurry; 24. Bottom plate of pressurized tank; 25. Nitrogen cylinder; 26. Pressure reducing valve; 27. Data acquisition instrument; 28. Hand valve; 29. Metal hose B; 41. Pressure relief plate; 42. Sealing ring; 43. Push rod; 44. Multi-function buffer block; 45. Buffer spring; 46. Arc splint; 47. Limit column; 48. Limit ring. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] Example 1:

[0042] See also Figure 1-5 The present invention proposes a new type of non-contact pressurized solidification device for solid propellant, which includes an air supply system, a solidification system, and a data acquisition system;

[0043] The gas supply system includes a metal hose A1, a hose connector 3, a nitrogen cylinder 25, a pressure reducing valve 26, a hand valve 28, and a metal hose B 29. The nitrogen cylinder 25 is secured to a cylinder stand to prevent it from tipping over and is threadedly connected to the pressure reducing valve 26. Adjusting the pressure reducing valve 26 reduces the pressure within the cylinder, allowing the required high-pressure gas to flow to the curing system. The metal hose A1 threadedly connects the nitrogen cylinder 25 to the curing system, serving as the curing system's air inlet. The metal hose B 29 is threadedly connected to the metal hose A1 via a tee, and the hand valve 28 is also threadedly secured to the end of the metal hose B 29.

[0044] The curing system includes an insulation box 2, a pressurized tank cover 4, an upper flange 5, a threading pressure cap A6, a sealing silicone A7, a threading base A8, a pressurized tank cavity 9, a pressure transmission block 10, a cylinder 11, a cylinder bottom plate 12, a lower flange 13, a pressure sensor base 17, a threading pressure cap B18, a sealing silicone B19, a threading base B 20, handle 21, medicine slurry 23, pressurized tank bottom plate 24; the pressurized tank cover 4 is connected to the metal hose A1 through the hose connecting seat 3, so that high-pressure nitrogen can enter the pressurized tank smoothly and steadily; the pressurized tank cavity 9 is bolted to the pressurized tank cover 4 through the upper flange 5, and is bolted to the pressurized tank bottom plate 24 through the lower flange 13; the threading pressure cap A6 is connected to the threading base A8 through a thread and sealed with a sealing silicone A7, and a small hole is left on the pressurized tank cover 4 and the sealing silicone A7 for the temperature thermocouple 22 to pass through the pressurized tank cover 4 and enter the cavity; the threading pressure cap B18 is connected to the threading base B20 through a thread and sealed with a sealing silicone B19, and a small hole is left on the pressure transmission block 10 and the sealing silicone B19 for the temperature thermocouple 22 to pass through the pressure transmission block 10 to measure the temperature inside the medicine column; the handle 21 is used to place the pressure transmission block 10 more stably; the pressure sensor base 17 is used to connect the pressure sensor 16 to achieve real-time pressure measurement;

[0045] The data acquisition system includes a pressure data transmission line 14, a temperature data transmission line 15, a pressure sensor 16, a temperature thermocouple 22, and a data acquisition instrument 27. The pressure sensor 16 is threadedly connected to the pressure sensor base 17 to measure the pressure in the pressurized chamber in real time and transmit the measured data to the data acquisition instrument 27 via the pressure data transmission line 14. The temperature thermocouple 22 passes through the fine holes left by the sealing silicone B19, the pressurized tank cover 4, the sealing silicone A7, and the pressure transmission block 10, respectively, to directly measure the temperature in the slurry 23, and transmits the measured data to the data acquisition instrument 27 via the temperature data transmission line 15.

[0046] In order to avoid direct contact between the slurry 23 and the high-pressure nitrogen, a pressurized curing test is performed through the pressure transmission block 10. The diameter of the pressure transmission block 10 should match the inner diameter of the cylinder 11 to prevent the slurry 23 from leaking and the pressure transmission block 10 from descending too quickly.

[0047] The hose connector 3, threading cap A6, sealing silicone A7, threading base A8, pressure sensor base 17, threading cap B18, sealing silicone B19, and threading base B20 form a sealed structure. The hose connector 3 ensures that high-pressure nitrogen can enter the curing tooling. The threading cap A6, sealing silicone A7, threading base A8, threading cap B18, sealing silicone B19, and threading base B20 ensure that the temperature thermocouple 22 passes through the sealing silicone B19, the pressurized tank cover 4, the sealing silicone A7, and the small holes left in the pressure transmission block 10. The diameter of the temperature thermocouple 22 should match the four small holes to prevent air leakage. The pressure sensor 16 is installed on the pressure sensor base 17 via threads to monitor the air pressure within the curing tooling.

[0048] The pressure transmission block 10 is provided with an annular groove at the middle height position and the upper part of the inner wall of the cylinder body 11 for placing the ignition rubber sealing ring. The groove should match the diameter of the ignition rubber sealing ring, which not only prevents air leakage in the device, but also slows down the descent speed of the pressure transmission block 10, allowing the slurry 23 to be pressurized at an ultra-slow rate, which is more conducive to the smooth implementation of the pressurized curing test. During the test, the pressure transmission block 10 is simply flexibly positioned with the cylinder body 11 through the annular ignition rubber sealing ring at the middle height. When no pressure is applied, the bottom surface of the pressure transmission block 10 and the upper surface of the slurry 23 are in a fitted state, preventing the occurrence of excessive drug volume, the slurry 23 being squeezed by the pressure transmission block 10 and the inner wall of the cylinder body 11, and the occurrence of test accidents. When pressurized, the ignition rubber sealing ring can be deformed, allowing the pressure transmission block 10 to produce a small displacement, thereby pressurizing the slurry 23.

[0049] A groove is formed on the upper edge of the pressurized tank cavity 9 and the bottom plate 24 of the pressurized tank for placing the ignition seal ring. The groove should match the diameter of the ignition seal ring, which not only improves the airtightness of the curing system, but also prevents drug leakage during the experiment, thereby improving the safety of the test.

[0050] The temperature thermocouple 22 passes through the holes of the sealing silica gel B19, the upper cover of the pressurized tank 4, the sealing silica gel A7, and the pressure transmission block 10 in sequence to directly measure the temperature inside the grain during the entire pressurized curing process. The heat of the curing reaction is calculated by the difference between the grain temperature and the set temperature of the insulation box 2.

[0051] The present invention presents a novel non-contact pressurized solidification device for solid propellants: Assemble the test device. The pressurized tank cavity 9 is bolted to the tank cover 4 via the upper flange 5 and to the tank bottom plate 24 via the lower flange 13. Check for airtightness; install and secure the air source.

[0052] A pressure relief plate 41 is slidably installed above the inner wall of the pressurized tank cavity 9, and a sealing ring 42 is installed on the outer surface of the pressure relief plate 41. The upper surface of the pressure relief plate 41 is connected to a push rod 43 that rotates evenly in a circle. The push rod 43 is rotatably connected to the end of the push rod 43 away from the sealing ring 42, and the multi-function buffer block 44 is slidably installed on the pressurized tank cover 4 away from the push rod 43. A limiting ring 48 is fixedly installed on the lower surface of the multi-function buffer block 44, and a buffer spring 45 is symmetrically fixedly installed on one side of the multi-function buffer block 44, and an arc-shaped splint 46 is fixedly installed on the other side of the multi-function buffer block 44. The buffer spring 45 is fixedly connected to the limiting ring 48 at one end away from the multi-function buffer block 44.

[0053] The sealing ring 42 is made of corrosion-resistant and high-pressure-resistant material, while the arc-shaped clamping plate 46 is made of a material with a certain toughness and corrosion resistance;

[0054] This solution provides a pressure relief plate 41 on the inner wall above the pressurized tank cavity 9. This can reduce the pressure fluctuations in the pressurized chamber caused by external factors such as power supply fluctuations, improper operation, or internal factors such as material inhomogeneity and reaction heat release during the material pressurization and curing process. In this case, the pressure relief device can absorb and buffer these pressure fluctuations, maintaining the pressure in the chamber stable, thereby ensuring the smooth progress of the curing process.

[0055] Moreover, during the pressurization or depressurization process, the sliding of the pressure relief plate 41 in the pressurized tank cavity 9 can slow down the speed of pressure change, reduce the mechanical impact on the pressurized chamber wall and internal workpieces, and improve the overall stability of the equipment. By converting the vertical pressure into pressure on the limit column 47, the mechanical impact on the inner wall of the device can be reduced, thereby reducing high-pressure deformation damage to the equipment.

[0056] It should be noted that the buffer spring 45 in this solution can be installed and replaced, and the buffer spring 45 with different elastic potential energy can be replaced according to the pressurized curing standard.

[0057] Install the nitrogen cylinder 25 on the anti-dumping cylinder rack; install and fix the air inlet and outlet pipelines, various sensors and data transmission lines, and connect the nitrogen cylinder 25 to the curing system through a threaded connection with the metal hose A1, which serves as the air inlet pipeline of the curing system. The metal hose B29 serves as the air outlet pipeline and is threadedly connected to the metal hose A1 through a tee. Fix the hand valve 28 at the pipe mouth of the metal hose B29 through a threaded connection. The pressure sensor 16 is connected to the pressure sensor base 17 through threads, and the temperature thermocouple 22 passes through the sealing silicone B19, the pressurized tank cover 4, the sealing silicone A7, and the fine holes left in the pressure transmission block 10 in sequence, and transmits the measured data to the data acquisition instrument 27 through the pressure data transmission line 14 and the temperature data transmission line 15. The data acquisition instrument 27 is turned on and an initial signal inspection is performed; the slurry 23 is poured into the cylinder body 11 using a vacuum pouring method and the device is sealed; the nitrogen bottle 25 is opened to supply gas, and the working state of the pressure reducing valve 26 is adjusted; a pressurized curing test is carried out, and temperature and pressure data are collected in real time; after the test, the pressure reducing valve 26 is closed, the hand valve 28 is opened, and the gas is discharged from the metal hose B29. The hand valve 28 is equipped with a venturi tube for flow limiting to achieve slow-rate safety exhaust;

[0058] Design a pressurized curing test for a certain NEPE solid propellant, such as Figure 3 The figure shows the curing temperature and pressure curves measured by data acquisition instrument 27 during the test. The test lasted seven days. Initially, the test pressurized the device for three hours at a rate of 0.002 MPa / min, maintaining a constant pressure of 5 MPa. At the end of the test, the test depressurized the device for three hours at a rate of 0.002 MPa / min. The monitored grain temperature increased from room temperature (25°C) to 58°C at an average rate of 2.4°C / h during the initial curing phase and remained at 58°C until the device was depressurized and the test concluded. The cured grains produced were uniform, bubble-free, and had a high charge density. During disassembly of the device's structural components, there was minimal leakage of slurry from gaps, resulting in excellent demolding. The test was safe, and the measurement results met expectations.

[0059] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solutions and improved concepts of the present invention within the technical scope disclosed by the present invention, and these changes should be covered by the scope of protection of the present invention.

Claims

1. A new type of non-contact pressurized solidification device for solid propellant, characterized in that: The device includes an air supply system, a curing system, and a data acquisition system, wherein: The gas supply system comprises a nitrogen cylinder (25), the nitrogen cylinder (25) being fixed on a cylinder stand, and a pressure reducing valve (26) being installed on the nitrogen cylinder (25), the pressure reducing valve (26) being used to adjust the pressure in the nitrogen cylinder (25); a metal hose A (1) being connected to the pressure reducing valve (26), the end of the metal hose A (1) being away from the pressure reducing valve (26) being connected to the curing system, and serving as an air inlet pipe of the curing system; a metal hose B (29) being connected to the metal hose A (1) via a tee pipe, and a hand valve (28) being fixedly installed at the pipe mouth of the metal hose B (29); The top of the curing system is connected to a data transmission line, and the end of the data transmission line away from the curing system is connected to a data acquisition instrument (27) of the data acquisition system.

2. A novel non-contact pressurized solidification device for solid propellant according to claim 1, characterized in that: The curing system comprises an insulation box (2), wherein a pressurized tank bottom plate (24) is provided at the bottom end of the insulation box (2), a pressurized tank cavity (9) is placed on the pressurized tank bottom plate (24), and the bottom end of the pressurized tank cavity (9) is fixed to the pressurized tank bottom plate (24) through a lower flange (13); a pressurized tank upper cover (4) is provided above the pressurized tank cavity (9), and the pressurized tank upper cover (4) is fixed to the top of the pressurized tank cavity (9) through an upper flange (5); a hose connection seat (3) and a pressure sensor base (17) are installed on the pressurized tank upper cover (4), and the end of the metal hose A (1) away from the nitrogen bottle (25) is fixedly connected to the hose connection seat (3), a pressure sensor (16) is installed on the pressure sensor base (17), and a pressure data transmission line (14) is connected to the pressure sensor (16).

3. A novel non-contact pressurized solidification device for solid propellant according to claim 1, characterized in that: A pressure relief plate (41) is slidably mounted above the inner wall of the pressurized tank cavity (9), a sealing ring (42) is mounted on the outer surface of the pressure relief plate (41), and a push rod (43) is connected to the upper surface of the pressure relief plate (41) in a circumferentially uniform manner, and the push rod (43) is rotatably connected to a multi-function buffer block (44) at one end away from the sealing ring (42), and the multi-function buffer block (44) is slidably mounted on the pressurized tank cover (4) at one side away from the push rod (43), and a limiting ring (48) is fixedly mounted on the lower surface of the multi-function buffer block (44), and a buffer spring (45) is symmetrically fixedly mounted on one side of the multi-function buffer block (44), and an arc-shaped splint (46) is fixedly mounted on the other side of the multi-function buffer block (44), and the buffer spring (45) is fixedly connected to the limiting ring (48) at one end away from the multi-function buffer block (44).

4. A novel non-contact pressurized solidification device for solid propellant according to claim 1, characterized in that: The curing system further comprises a cylinder (11), the cylinder (11) being arranged inside the pressurized tank cavity (9), the cylinder (11) containing the medicine slurry (23), a pressure transmission block (10) being arranged above the cylinder (11), the top of the pressure transmission block (10) being fixedly connected with a handle (21); a threading base A (8) being arranged at the center position of the top surface of the pressure transmission block (10), a threading pressure cap A (6) being connected to the threading base A (8), a sealing silica gel A (7) being arranged between the threading pressure cap A (6) and the threading base A (8); a threading base A (8) being provided at the center position of the top surface of the pressurized tank cover (4) A threading base B (20) is provided at the position, a threading pressure cap B (18) is connected to the threading base B (20), and a sealing silica gel B (19) is provided between the threading pressure cap B (18) and the threading base B (20); fine holes are provided on the pressure transmission block (10), the threading base A (8), the threading pressure cap A (6), the sealing silica gel A (7), the upper cover of the pressurized tank (4), the threading base B (20), the threading pressure cap B (18), and the sealing silica gel B (19), and a temperature thermocouple (22) is installed through the fine hole, and the top of the temperature thermocouple (22) is connected to the temperature data transmission line (15).

5. The novel non-contact pressurized solidification device for solid propellant according to claim 1, characterized in that: The data acquisition system comprises a pressure data transmission line (14), a temperature data transmission line (15), a pressure sensor (16), a temperature thermocouple (22), and a data acquisition instrument (27); the pressure sensor (16) is connected to the data acquisition instrument (27) via the pressure data transmission line (14), the temperature thermocouple (22) is connected to the data acquisition instrument (27) via the temperature data transmission line (15), and the bottom end of the temperature thermocouple (22) is inserted into the interior of the medicine slurry (23) for directly measuring the temperature inside the medicine slurry (23).

6. The novel non-contact pressurized solidification device for solid propellant according to claim 1, characterized in that: A pressure-curing test is performed by setting a pressure transmission block (10) to avoid direct contact between the slurry (23) and high-pressure nitrogen; the diameter of the pressure transmission block (10) matches the inner diameter of the cylinder (11) to prevent leakage of the slurry (23) and control the descending speed of the pressure transmission block (10).

7. A novel non-contact pressurized solidification device for solid propellant according to claim 3, characterized in that: The inner diameter of the fine hole matches the diameter of the temperature thermocouple (22) to avoid air leakage; the pressure sensor (16) is used to monitor the air pressure inside the heat preservation box (2); the pressure transmission block (10) is provided with an annular groove A at the middle height position and the upper part of the inner wall of the cylinder body (11) for placing the ignition rubber sealing ring; the groove A matches the diameter of the ignition rubber sealing ring to prevent air leakage and control the descending speed of the pressure transmission block.

8. The novel non-contact pressurized solidification device for solid propellant according to claim 2, characterized in that: The upper edge of the pressurized tank cavity (9) and the pressurized tank bottom plate (24) are each provided with a circle of groove B for placing an ignition sealing ring, and the groove B matches the diameter of the ignition sealing ring.

9. A novel non-contact pressurized solidification device for solid propellant according to claim 2 or 3, characterized in that: The temperature thermocouple (22) passes through the sealing silica gel B (19), the upper cover of the pressurized tank (4), the sealing silica gel A (7), and the fine holes left by the pressure transmission block (10) in sequence, and is used to directly measure the temperature inside the medicine column during the entire pressurized curing process, and calculate the curing reaction heat by the difference between the medicine column temperature and the set temperature of the insulation box (2).

10. A novel non-contact pressurized solidification method for solid propellant implemented by the device according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. Assemble the test device: connect the pressure tank cavity (9) to the pressure tank upper cover (4) through the upper flange (5) with bolts, and connect it to the pressure tank bottom plate (24) through the lower flange (13) with bolts, and check the airtightness; S2. Gas source installation and fixation: Install the nitrogen cylinder (25) on the anti-dumping cylinder stand; S3. Install and fix the gas supply pipeline, various sensors and data transmission lines: connect the metal hose B (1) to the nitrogen bottle (25) through a thread and connect it to the curing system to serve as the gas supply pipeline of the curing system; connect the pressure sensor (16) to the pressure sensor base (17) through a thread, and pass the temperature thermocouple (22) through the sealing silica gel B (19), the pressure tank cover (4), the sealing silica gel A (7), and the fine holes left in the pressure transmission block (10) in sequence, and transmit the measured data to the data acquisition instrument (27) through the pressure data transmission line (14) and the temperature data transmission line (15). Turn on the data acquisition instrument (27) and perform a preliminary signal inspection; S4, pouring the slurry (23) into the cylinder (11) by a vacuum pouring method and sealing the device; S5. Open the nitrogen bottle (25) to supply gas and adjust the working state of the pressure reducing valve (26); S6. Perform a pressurized curing test and collect temperature and pressure data in real time; S7. After the test is finished, the pressure reducing valve (26) is closed, the hand valve (28) is opened, and the gas is discharged through the metal hose B (29). The hand valve (28) is equipped with a venturi tube for flow limiting to achieve slow-rate safety exhaust.

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