Launching charge curing device

Abstract

The utility model provides a launching charge curing device, namely a special curing device, which is used for curing grouped slender tubular charges for a long time after bonding, ensuring that slender grains are not inclined and bent, preventing the charges from toppling over, improving the process safety, simplifying the operation arrangement, reducing the operation time and ensuring the product curing quality. The utility model discloses a launch charge curing device which comprises a bottom plate, a hanging plate, a stand column, a pressure spring, an upper pressure plate, a pressure head, a nut and a lifting plate, after the grouped grains are bonded, a lifting plate of the device is pulled up by one hand, a combined piece is placed at a convex position on a bottom plate of the device by the other hand so as to be conveniently positioned, then the lifting plate is slowly loosened, grouped pressure heads penetrate into inner holes of the grains through oblique conical surfaces of the pressure heads under the action of pressure springs, and the positions of the upper end surfaces of the grains are corrected through conical surface contact; finally, the annular plane of the pressing head makes contact with the upper end face of the grain, small pressing force is applied to the grain, and it is guaranteed that the grain is in the vertical state all the time in the curing process.

Description

Technical Field

[0001] This utility model belongs to the field of solid rocket engine propellant assembly technology, and relates to a propellant curing device, which can be used for curing and shaping after bonding a group of slender tubular solid rocket engine propellants, and can also be used for curing other similar grouped slender tubular parts after bonding. Background Technology

[0002] Solid rocket engines are generally used as launch propulsion systems. To achieve high thrust in a short time, they often employ a structure in which multiple slender, tubular, high-burning-velocity solid propellant grains are bonded together. During engine operation, the propellant grains must withstand large impact loads. If the grains are not firmly bonded or are misaligned, it may cause abnormal engine thrust or even an explosion. Therefore, the propellant grain bonding process is often considered a critical process.

[0003] After the propellant charges are bonded to the loading plate, they need to undergo a slow, room-temperature curing process that lasts up to nine days. Due to the slender, tubular structure of the propellant charges, they may tilt as the curing time increases. Charges with a large length-to-slenderness ratio may bend, and in severe cases, the charge may tip over. Because the propellant is highly sensitive, this could lead to a deflagration accident, posing a high safety risk. Currently, the commonly used method is to use rubber bands around the outer circumference of the propellant charges after bonding, which can limit the outward tilting of the charges. However, due to the contraction force of the rubber bands, the charges may tilt inward, and the risk of bending and safety hazards still exist. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned defects and safety risks by proposing a dedicated curing device for propellant loading. This device is used for long-term curing of groups of slender tubular propellant loadings after bonding, ensuring that the slender propellant columns do not tilt or bend, preventing the loading from tipping over and improving process safety. At the same time, it simplifies the operation layout, reduces operation time, and ensures the curing quality of the product.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A propellant curing device includes: a base plate, a propellant hanging plate, a column, a compression spring, an upper pressure plate, a pressure head, a nut, and a lifting plate; the base plate has a cylindrical boss at its center, which is embedded in the bottom of the propellant hanging plate; the upper surface of the propellant hanging plate has cylindrical protrusions evenly distributed around its circumference, equal in number to the number of propellant columns, and the propellant columns are installed on the protrusions of the propellant hanging plate; the column has threads at both ends, which are respectively connected to threaded holes on the edges of the base plate and the upper pressure plate; the upper pressure plate has through holes evenly distributed around its circumference, consistent with the arrangement of the propellant columns, and the through holes are coaxial with the propellant columns; the upper pressure plate also has a central hole, through which the lifting plate passes; the upper pressure plate... The main frame of the device is formed by fixing the column and the base plate together. The pressure head consists of a stud and a truncated cone with a slanted conical surface at the lower end. The upper end of the stud is threaded, and the lower part is a smooth axis. The smooth axis of the pressure head passes through the through hole of the compression spring and the upper pressure plate. One end of the compression spring contacts the bottom surface of the upper pressure plate, and the other end contacts the truncated cone surface of the pressure head. The thread of the pressure head is engaged with the nut, and the slanted conical surface of the pressure head can penetrate the inner hole of the medicine column. The lifting plate includes a circular thin plate. The cylindrical protrusion extending from the line segment end of the circular thin plate is engaged with the central through hole of the upper pressure plate. The diameter of the circular thin plate is smaller than the diameter of the inscribed circle of the through hole on the upper pressure plate that is coaxial with the medicine column, and it can be locked in place by the nut.

[0007] Furthermore, the diameter of the circular thin sheet of the lifting plate is larger than the diameter of the inscribed circle inside the nut, thus allowing it to be locked in place by the nut.

[0008] Furthermore, the nut causes the pressure head to rise, and the compression spring to contract.

[0009] Furthermore, under the action of the compression spring, the inclined conical surface of the pressure head penetrates into the inner hole of the propellant cartridge through its inclined conical surface.

[0010] Furthermore, the annular plane of the truncated cone of the pressure head can contact the upper end face of the propellant column.

[0011] Furthermore, the base plate has a cylindrical boss with a height of 1mm.

[0012] Furthermore, three 6mm threaded holes are evenly distributed at the edge of the base plate for mounting the column; the stud has a 7mm high thread.

[0013] Furthermore, the column has three supports.

[0014] Furthermore, the bottom surface of the medicine hanging plate has a hollow structure, which cooperates with the cylindrical boss at the center of the top plate.

[0015] Furthermore, the upper end of the lifting plate is a handle.

[0016] The technical effects of this utility model are:

[0017] 1. All parts of this utility model that may come into contact with the propellant, such as the bottom plate, upper pressure plate, column, pressure head, and lifting plate, are made of non-sparking copper alloy material. Therefore, there is no safety issue of sparks causing combustion and explosion during use.

[0018] 2. The base plate has a 1mm high protrusion designed according to the size of the medicine loading plate, which facilitates quick positioning and prevents the medicine from slipping sideways.

[0019] 3. The front end of the pressure head is designed with a corresponding guide cone surface according to the inner hole size of the propellant, which facilitates the positioning of the upper end face of the propellant. At the same time, the cone surface has a self-guiding function to correct the position of the upper part of the propellant, ensuring that each of the propellant in the group is in a vertical state.

[0020] 4. This utility model uses multiple cylindrical compression springs. The elastic contraction of the compression springs can achieve the compression of drug columns of different heights, which solves the problem of straightening short drug columns and ensures the consistency of the curing state of drug columns of different lengths.

[0021] 5. By designing a pull rod structure, multiple pressure heads can be pulled up at the same time, achieving the goal of one-person operation, while simplifying the operation steps and improving work efficiency.

[0022] 6. The main structure of the device is connected by three columns, which provides good structural rigidity. Even if a fall occurs, the drug column will not tip over or scatter because it is bidirectionally fixed within the main frame by the bottom plate protrusion and the pressure head, ensuring high safety.

[0023] 7. The device is modularly designed and can be expanded into a multi-cavity mold, which can further reduce production costs.

[0024] 8. This device is highly operable and does not require high skill levels from operators, making it suitable for widespread application in the propellant bonding process of solid rocket engines.

[0025] The present invention will be further described in detail below with reference to the accompanying drawings. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the explosive charge structure;

[0027] Figure 2 This is an overall structural diagram of the charge-and-curing device;

[0028] Figure 3 Exploded view of the charge solidification device;

[0029] Figure 4 This is a schematic diagram illustrating the working principle of the device;

[0030] 1: base plate; 2: medicine hanging plate; 3: medicine column; 4: column; 5: compression spring; 6: upper pressure plate; 7: pressure head; 8: nut; 9: lifting plate. Detailed Implementation

[0031] A propellant curing device includes: a base plate, a set of uprights, an upper pressure plate, a set of pressure heads, a set of compression springs, and a lifting plate. After the propellant columns are bonded together, one hand pulls up the lifting plate of the device, while the other hand places the assembly on the protrusion on the base plate of the device for positioning. Then, the lifting plate is slowly released, and under the action of the compression springs, the set of pressure heads penetrates the inner hole of the propellant column through its inclined conical surface. The position of the upper end face of the propellant column is corrected by the contact of the conical surface. Finally, the annular plane of the pressure head contacts the upper end face of the propellant column, applying a small clamping force to the propellant column to ensure that the propellant column remains vertical during the curing process.

[0032] The base plate, column, and upper pressure plate constitute the main structure of the device. The correction and clamping force of the medicine column are achieved by the combined action of the guide pressure head and the pressure spring. The function of the pull rod is to control the lifting of the pressure head, thereby simplifying the operation steps and improving work efficiency.

[0033] like Figure 1 As shown, the medicine column assembly consists of medicine columns 3 and medicine hanging plate 2. The medicine columns 3 are hollow cylindrical structures, and there are several medicine columns 3 in a set. The bottom of the medicine hanging plate 2 is a hollow structure, and the top end face has cylindrical protrusions evenly distributed around its circumference, equal in number to the number of medicine columns 3. The medicine columns 3 are installed on the protrusions of the medicine hanging plate 2. Because the protrusions are small in size, the contact area between the two is small, so the main connection method between the two is adhesive.

[0034] like Figure 2 As shown, the base plate 1 has a cylindrical boss with a height of 1mm, which is embedded in the bottom of the medicine hanging plate 2 for easy and quick positioning during use. There are three 6mm threaded holes evenly distributed on the edge of the base plate 1, and a set of columns 4 are installed there. The cylindrical surface of the column 4 has a flat groove, and a flathead wrench can be used when installing the device. The two ends of the column 4 have stepped shafts to control the height of the overall device. The two ends of the column 4 are threaded and threaded to the base plate 1 and the upper pressure plate 6.

[0035] like Figure 3 As shown, the upper pressure plate 6 is fixed to the base plate 1 by a set of columns 4 to form the main frame of the device. The upper pressure plate 6 has through holes that are arranged in the same direction as the set of pills 3. The through holes are coaxial with the pills 3. The pressure head 7 is installed on the through holes of the upper pressure plate 6. The center of the upper pressure plate 6 also has a through hole, which cooperates with the lifting plate 9 to restrict the lifting plate 9 to move only along the axial direction.

[0036] like Figure 3As shown, the pressure head 7 consists of a stud and a frustum with a tapered surface. The stud has a 7mm high thread, and the remaining part is a smooth shaft. The smooth shaft mates with the through hole of the upper pressure plate 6, ensuring that the pressure head 7 does not wobble left or right when moving within the through hole. A compression spring 5 is mounted on the smooth shaft of the pressure head 7. The smooth shaft of the pressure head 7 passes through the compression spring 5 and connects to the upper pressure plate 6. One end of the compression spring 5 contacts the bottom surface of the upper pressure plate 6, and the other end contacts the frustum surface of the pressure head 7. A nut 8 is installed on the threaded portion of the pressure head 7 to prevent the pressure head 7 from falling off the upper pressure plate 6 when the compression spring 5 is released.

[0037] The lifting plate 9 is a thin circular sheet with a cylindrical protrusion extending from one end to mate with the central through hole of the upper pressure plate 6, thus fixing the movement trajectory of the lifting plate 9. The other end serves as a handle for easy operation, and its shape is a combination of a cylinder and a sphere. The diameter of the thin sheet is slightly smaller than the diameter of the inscribed circle of the through hole on the upper pressure plate 6 that is coaxial with the drug cartridge 3.

[0038] The working process and principle of this utility model

[0039] The operating procedure of the device is as follows: After the medicine column 3 and the medicine hanging plate 2 are installed and glued together, one hand holds the medicine column assembly, and the other hand pulls the handle of the lifting plate 9. The lifting plate 9 rises vertically and locks the nut 8. The nut 8 drives the pressure head 7 to rise, at which point the compression spring 5 contracts. One hand places the medicine column assembly into the device, and the protrusion on the base plate 1 embeds into the bottom of the medicine hanging plate 2. At this time, the other hand slowly releases the lifting plate 9. Under the action of the compression spring 5, the group of pressure heads 7 penetrates the inner hole of the medicine column 3 through its inclined conical surface. The position of the upper end face of the medicine column 3 is corrected by the contact of the conical surface (e.g., ...). Figure 4 As shown), the annular plane of the final pressure head 7 contacts the upper end face of the drug column 3, applying a small clamping force to the drug column 3. The compression of drug columns 3 of different heights can be achieved through the elastic contraction of the compression spring 5, which solves the problem of straightening short drug columns 3 and ensures the consistency of the curing state of drug columns 3 of different lengths.

Claims

1. A device for solidifying a propellant charge, characterized in that, include: Base plate (1), medicine hanging plate (2), column (4), compression spring (5), upper pressure plate (6), pressure head (7), nut (8), lifting plate (9); The base plate (1) has a cylindrical boss at the center of its upper surface, which is embedded in the bottom of the medicine hanging plate (2); The upper surface of the medicine hanging plate (2) is evenly distributed with cylindrical protrusions equal in number to the number of medicine columns, and the medicine columns (3) are installed on the protrusions of the medicine hanging plate (2); The column (4) is threaded at both ends and connected to the threaded holes on the edges of the base plate (1) and the upper pressure plate (6), respectively; The upper pressure plate (6) has through holes evenly distributed around its circumference, which are consistent with the arrangement of the medicine columns (3). The through holes are coaxial with the medicine columns (3). The upper pressure plate (6) also has a central hole through which the lifting plate (9) passes. The upper pressure plate (6) is fixed to the base plate (1) by the column (4) to form the main frame of the device. The pressure head (7) consists of a stud and a truncated cone with a tapered surface at the lower end. The upper end of the stud is threaded and the lower part is a smooth axis. The smooth axis of the pressure head (7) passes through the through hole of the compression spring (5) and the upper pressure plate (6). One end of the compression spring (5) contacts the bottom surface of the upper pressure plate (6) and the other end contacts the truncated cone surface of the pressure head (7). The thread of the pressure head (7) is engaged with the nut (8) and the tapered surface of the pressure head (7) can penetrate the inner hole of the drug cartridge (3). The lifting plate (9) includes a circular sheet. The cylindrical protrusion extending from the end of the circular sheet matches the central through hole of the upper pressure plate (6). The diameter of the circular sheet is smaller than the diameter of the inscribed circle of the through hole on the upper pressure plate (6) that is coaxial with the drug cartridge (3), and it can be locked in place by the nut (8).

2. The propellant curing device according to claim 1, characterized in that, The diameter of the circular thin sheet of the lifting plate (9) is larger than the diameter of the inner circle of the nut (8), so that it can be stuck by the nut (8).

3. The propellant curing device according to claim 1, characterized in that, The nut (8) drives the pressure head (7) to rise, and the pressure spring contracts.

4. The propellant curing device according to claim 1, characterized in that, Under the action of the compression spring, the inclined conical surface of the pressure head penetrates into the inner hole of the propellant cartridge through its inclined conical surface.

5. The propellant curing device according to claim 1, characterized in that, The annular plane of the truncated cone of the pressure head can contact the upper end face of the propellant.

6. The propellant curing device according to claim 1, characterized in that, The base plate has a cylindrical boss with a height of 1mm.

7. The propellant curing device according to claim 1, characterized in that, Three 6mm threaded holes are evenly distributed along the edge of the base plate for mounting the column; the stud has a 7mm high thread.

8. The propellant curing device according to claim 1, characterized in that, There are three pillars.

9. The propellant curing device according to claim 1, characterized in that, The bottom surface of the medicine hanging plate has a hollow structure, which matches the cylindrical boss in the center of the top plate.

10. The propellant curing device according to claim 1, characterized in that, The top of the lifting plate is a handle.

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