Group ejector core demolding device for small combustion chamber

Abstract

The utility model discloses a grouped top core demolding device for a small combustion chamber, and relates to the field of solid rocket engine charging, the grouped top core demolding device comprises a pouring support and a plurality of independent portable single-shot top core devices, the pouring support comprises a bottom plate, a middle support and an annular supporting table, the middle support is connected to the middle of the bottom plate, and the annular supporting table is connected to the bottom plate; the annular supporting table is arranged outside the middle support in a sleeving mode, and the annular supporting table is fixedly connected with the bottom plate. A plurality of mounting holes are formed in the annular supporting table in the circumferential direction, and each mounting hole is used for mounting one combustion chamber; the position, right opposite to each mounting hole, of the bottom plate is connected with a single ejection core device through a fixing structure. The multiple combustion chambers can be demolded at the same time, the production efficiency can be greatly improved, and the risk in the demolding process is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of solid rocket engine propellant technology, specifically solid rocket engine demolding technology, and relates to a group core demolding device for a small solid rocket engine. Background Technology

[0002] Small solid rocket motor combustors are characterized by their small size, low propellant load, and large production volume. Based on these characteristics, the current production model for small solid rocket motors typically employs a modular propellant loading process. Depending on the propellant formulation and the characteristics of the casting workshop, these motors may be grouped into sets of 4, 6, 10, or even more, with propellant being cast as a single unit. Furthermore, the propellant loading process for small solid rocket motor combustors first requires mandrel assembly, followed by vacuum casting of the propellant. After casting, a demolding operation is performed, which involves removing the mandrel from the combustor. During the demolding process, the metal mandrel rubs against the propellant, making it the most dangerous step in the propellant loading process. The demolding process requires personnel to participate in tasks such as engine hoisting, tooling dismantling, and residual propellant cleaning. The removal of the mandrel requires remote operation and evacuation. Additionally, the workshop requires a fixed number of personnel and quantities. For integrally cast products, the existing demolding process suffers from problems such as repeated entry and exit from the workshop, cumbersome operation, low production efficiency, and low safety. Utility Model Content

[0003] The technical problem solved by this application is to overcome the shortcomings of the prior art and provide an automatic core demolding method for small group products. It can be operated remotely, is compact and portable, and can demold multiple combustion chambers at the same time, which can greatly improve production efficiency and reduce the risks in the demolding process.

[0004] The technical solution provided in this application is as follows:

[0005] A set-top core demolding device for small combustion chambers includes a casting support and multiple independent, liftable single-engine top core devices. The casting support includes a first base plate, a middle support, and an annular support platform. The middle support is connected to the middle of the first base plate, and the annular support platform is sleeved on the outside of the middle support and fixedly connected to the first base plate. The annular support platform has multiple mounting holes along its circumference, each mounting hole for mounting one combustion chamber. A single-engine top core device is connected to the first base plate at the position corresponding to each mounting hole through a fixing structure.

[0006] The fixing structure includes fixing holes and pressure plates. The first base plate has fixing holes at the position opposite to the mounting holes. The single-shot core device is placed in the fixing holes. The first base plate has multiple threaded holes around each fixing hole. The pressure plate is connected to the first base plate through the threaded holes. The pressure plate presses on the upper surface of the base edge of the single-shot core device to fix the single-shot core device to the first base plate.

[0007] A protrusion is provided on the inner bottom of the fixing hole; when the single-shot core device is located in the fixing hole, the bottom of the single-shot core device contacts the protrusion.

[0008] A lifting ring is fixedly connected to the top of the central support.

[0009] The single-shot core device includes a hydraulic valve group, a second base plate, a base, and a push rod. The second base plate is fixedly connected to one end of the base. The push rod is installed in the mounting chamber and slidably connected to the base along its own axis. The base is provided with a mounting chamber to seal one end of the mounting chamber. The hydraulic valve group is used to drive the push rod to move.

[0010] The installation chamber is equipped with displacement and force sensors, which are used to collect the displacement and force of the push rod.

[0011] The end of the top rod extending out of the base is provided with a top cover to protect the end of the top rod.

[0012] In summary, this application includes at least the following beneficial technical effects:

[0013] Reduce demolding time for grouped products, improve demolding safety, and reduce the labor intensity of operators. Attached Figure Description

[0014] Figure 1 Diagram of a small hydraulic jacking device for long-distance operation;

[0015] Figure 2 Layout diagram of the main demolding platform;

[0016] Figure 3 The front view of the overall structural schematic diagram of the casting support;

[0017] Figure 4 for Figure 3 Top view.

[0018] Explanation of reference numerals in the attached diagram: 1. Casting support; 2. Single-launch core assembly;

[0019] 11. First base plate; 111. Fixing holes; 12. Middle support; 121. Ladder; 13. Circular support platform;

[0020] 21. Hydraulic valve assembly; 22. Second base plate; 23. Base; 24. Displacement and force sensor; 25. Top rod; 26. Handheld method and tooling installation position; 27. Top cover. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments disclosed herein will be described in further detail below with reference to the accompanying drawings.

[0022] This application discloses a grouped core demolding device for small combustion chambers, such as... Figure 1 As shown, it includes a casting support 1 and multiple independent, liftable single-launch core devices 2.

[0023] like Figure 1 As shown, the single-launch core assembly 2 includes a hydraulic valve group 21, a second base plate 22, a base 23, a displacement and force sensor 24, a push rod 25, and a top cover 27. The second base plate 22 is bolted to the base 23 and can be fixed to the casting support. The handheld method and tooling installation position 26 are located on the side of the assembly, adaptable to different tooling. The displacement and force sensor 24 collects data below the push rod 25, which is protected by the top cover 27.

[0024] like Figure 3 As shown, the casting support 1 includes a first base plate 11, a middle support 12, and an annular support platform 13. The middle support 12 is connected to the middle of the first base plate 11, and the annular support platform 13 is sleeved on the outside of the middle support 12 and fixedly connected to the first base plate 11. The annular support platform 13 has multiple mounting holes along its circumference, each mounting hole being used to install a combustion chamber.

[0025] like Figure 2 and Figure 4 As shown, the first base plate 11 has a fixing hole 111 at the position opposite to the mounting hole. A protrusion is provided on the bottom inner side of the fixing hole 111. The single-shot core device 2 is placed in the fixing hole, and the bottom of the single-shot core device 2 contacts the protrusion, so that the protrusion supports the bottom of the single-shot core device 2. The first base plate 11 has multiple threaded holes around each fixing hole. A pressure plate is connected to the first base plate 11 through the threaded holes. The pressure plate presses on the upper surface of the edge of the base 21 to fix the single-shot core device 2 to the first base plate 11.

[0026] A lifting ring is fixedly connected to the top of the central support 12. Using lifting equipment and the lifting ring, the casting support 1 is hoisted as a whole into the demolding pit. The distance between the top of the central support 12 and the top of the annular support platform 13 is not less than the height of the combustion chamber to ensure the stability of the casting support 1 and its positional stability during hoisting. A vertical ladder 121 is fixedly connected to the central support 12.

[0027] The structural design of the casting support 1 allows for the simultaneous demolding of multiple combustion chambers.

[0028] The single-engine ejector core device 2 is portable and lightweight. It is normally stationary in a fixed position but can be easily moved to a fixed location within the demolding pit when needed. The base is stable and does not wobble. It has a maximum ejector force of 4 tons and is compatible with various types of combustion chamber products. It is equipped with displacement and force sensors. The modified overall bracket can be adapted to fix this ejector core device. Simultaneously, an all-around camera is installed inside the demolding pit to monitor the product status from all angles. It has a control system that allows for remote ejector core operation. Using different numbers of single-engine cores each time allows for remote demolding of groups of products, greatly improving the demolding efficiency of small-scale group production engines, reducing the frequency of personnel entering the workshop, and effectively improving the safety of the group demolding process.

[0029] Normally, the single-shot mandrel device 2 is placed in a fixed position on the inner wall of the demolding pit, saving space. When preparing for demolding of grouped products, the grouped products are first placed into the demolding pit and secured. The operator then places the single-shot mandrel device 2 under each product, aligning it securely. After removing the group locking plate, positioning plate, and other fixtures at once, all operators leave the workshop and remotely control the mandrel operation. Simultaneously, personnel monitor the mandrel process on a monitor screen in the control room. Once the mandrels of the grouped products have been ejected together, the operator returns to the workshop to lift them and place them on the bracket, completing the demolding operation. Compared to conventional single-shot demolding, this significantly reduces labor intensity and greatly improves the efficiency and safety of demolding grouped products.

[0030] This method is applicable to the demolding of all small combustion chambers in groups, and is compatible with grouped products of different sizes and quantities. It reduces the number of times operators need to enter and exit the workshop, improves demolding safety, and also greatly improves the utilization rate of the workstation and demolding efficiency.

[0031] The contents not described in detail in this application specification are common knowledge to those skilled in the art.

[0032] The present application has been described in detail above with reference to specific embodiments and exemplary examples; however, these descriptions should not be construed as limiting the present application. Those skilled in the art will understand that various equivalent substitutions, modifications, or improvements can be made to the technical solutions and implementation methods of the present application without departing from the spirit and scope of the present application, and all such modifications and improvements fall within the scope of the present application. The scope of protection of the present application is determined by the appended claims.

Claims

1. A gang top core knockout device for small combustion chambers characterized by: The application relates to a single-shot core device, which comprises a pouring support (1) and a plurality of independent single-shot core devices (2), wherein the pouring support (1) comprises a first bottom plate (11), a middle support (12) and a ring-shaped supporting table (13), the middle support (12) is connected to the middle part of the first bottom plate (11), the ring-shaped supporting table (13) is sleeved outside the middle support (12), and the ring-shaped supporting table (13) is fixedly connected with the first bottom plate (11); a plurality of mounting holes are formed in the ring-shaped supporting table (13) in the circumferential direction, and each mounting hole is used for mounting a combustion chamber; the first bottom plate (11) is connected with a single-shot core device (2) through a fixing structure at a position opposite to each mounting hole.

2. A knockout assembly for small combustion chambers as defined in claim 1, characterized in that: The fixing structure comprises a fixing hole and a pressing plate, the first bottom plate (11) is provided with the fixing hole at the position opposite to the mounting hole, the single-shot core device is arranged in the fixing hole, a plurality of threaded holes are formed around each fixing hole of the first bottom plate (11), the pressing plate is connected with the first bottom plate (11) through the threaded holes, and the pressing plate is pressed on the upper surface of the edge of the base of the single-shot core device, so that the single-shot core device is fixedly connected with the first bottom plate (11).

3. A knockout assembly for small combustion chambers as defined in claim 2, characterized in that: The inner side bottom of the fixing hole is provided with a protruding part; when the single-shot core device is arranged in the fixing hole, the bottom of the single-shot core device is in contact with the protruding part.

4. A knockout assembly for small combustion chambers as defined in claim 1, characterized in that: The top of the middle support (12) is fixedly connected with a lifting ring.

5. A knockout assembly for small combustion chambers as defined in claim 1, characterized in that: The single-shot core device (2) comprises a hydraulic valve group (21), a second bottom plate (22), a base (23) and a top rod (25), the second bottom plate (22) is fixedly connected with one end of the base, the top rod (25) is installed in a mounting chamber and is slidably connected with the base (23) along the axis direction of the top rod (25), the base (23) is provided with the mounting chamber to block one end of the mounting chamber; the hydraulic valve group (21) is used for driving the top rod (25) to move.

6. A knockout assembly for small combustion chambers as defined in claim 5, characterized in that: A displacement and force sensor (24) is arranged in the mounting chamber, and the displacement and force sensor (24) is used for collecting the displacement and force of the top rod (25).

7. A knockout assembly for small combustion chambers as defined in claim 5, characterized in that: The end of the top rod (25) extending out of the base (23) is provided with a top cover (27) to protect the end of the top rod (25).

Images