Dismounting tool for overturning lifting appliance chuck

Abstract

The section of the disassembling tool is in an L shape, the disassembling tool is installed in an auxiliary hole in the side face of the skirt end of a shell, and one face of the disassembling tool is an arc face and is tightly attached to the surface of the shell. A positioning hole is designed in the cambered surface, and the chuck dismounting tool is fastened on the surface of the shell by using a fixing bolt; the other face of the disassembling tool is a plane, a reverse-jacking screw hole is designed, a reverse-jacking bolt is installed in the reverse-jacking screw hole, and the reverse-jacking bolt is tightened to abut against the metal chuck.

Description

Technical Field

[0001] This utility model relates to a disassembly tool for a flip-over lifting chuck, specifically a disassembly tool for a combustion chamber flip-over lifting chuck with a diameter of 2.0m or more, belonging to the field of solid rocket engine propellant loading technology. Background Technology

[0002] To flip the solid rocket motor casing or combustion chamber, flipping chucks are typically installed on the front and rear skirt end faces of the casing. The front and rear chucks are connected and secured by multiple evenly distributed long tie rods. During flipping, flipping chucks are suspended from the main hook and auxiliary hook of a crane, respectively. The lifting ropes of the flipping chucks are connected to the lifting lugs of the front and rear chucks. By adjusting the raising and lowering of the main hook and auxiliary hook of the crane, the flipping of the casing or combustion chamber is completed.

[0003] According to the design requirements of the combustion chamber, the front and rear openings of the shell will contain non-metallic soft molded components such as insulation layers and flame-retardant layers. To ensure the reliable positioning of these molded components and prevent deformation during the combustion chamber charging process, the radial mating surface of the chuck needs to be increased during the design process. This allows the inner surface of the metal chuck to mate with the steps of the non-metallic molded components through corresponding positions. Then, sealing materials and adhesives are used to glue and fix the edges of the molded components to the inner surface of the center hole of the chuck. After the combustion chamber charge has cured, the sealing material on the inner surface of the center hole of the chuck is peeled off, the chuck is removed, and the non-metallic molded components are exposed.

[0004] In fact, these non-metallic molded parts undergo thermal expansion during the curing process in the combustion chamber, and become tightly bonded to the metal chuck. The friction between the mating surfaces during chuck removal is very high. Manually removing the chuck with a crane is time-consuming and labor-intensive, resulting in extremely low work efficiency. Therefore, it is necessary to design auxiliary disassembly fixtures to achieve efficient and labor-saving removal of the chuck by flipping and lifting the chuck. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and solve the problem of time-consuming and labor-intensive removal of the chuck of the flipping lifting device in the prior art.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] A disassembly fixture for a flip-up lifting chuck is an L-shaped fixture, one side of which is an arc surface. The curvature of the arc surface needs to be designed according to the spacing between two adjacent process holes on the side of the housing skirt. Two through holes are designed on the arc surface, directly opposite the two adjacent process holes on the side of the housing skirt. The fixture is connected to the process holes on the side of the housing skirt by two fixing bolts. After installation, the arc surface should fit tightly against the surface of the housing.

[0008] The other side of the L-shape is flat, parallel to the metal chuck of the housing, and has screw holes and is equipped with a top bolt.

[0009] When removing the chuck, four sets of disassembly tools are used simultaneously, evenly distributed on the side of the housing group. The curved surface of the disassembly tool is tightly fitted to the housing and secured with two bolts. Then, anti-jacking bolts are installed in the flat screw holes of the disassembly tool. By slowly applying force to the anti-jacking bolts of each set of disassembly tools in four evenly distributed directions around the circumference of the housing, the anti-jacking bolts are pressed against the chuck. Further continuous force is applied to gradually separate the metal chuck from the non-metallic soft molded part, thereby removing the chuck.

[0010] This invention has significant advantages in shortening working hours and reducing the labor intensity of workers. For example, existing technologies generally require 1 hour to remove a metal chuck, while this invention only requires 30 minutes. Attached Figure Description

[0011] Figure 1 A sectional view showing the fit between the lifting chuck disassembly tooling and the housing;

[0012] Figure 2 Front and side views of the disassembly fixture for the flipping chuck.

[0013] Reference numerals: 1-Chuck disassembly fixture, 2-Positioning hole, 3-Reverse screw hole, 4-Fixing bolt, 5-Reverse screw, 6-Metal chuck, 7-Non-metallic molded part of the housing. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0015] This embodiment is a disassembly tooling for a combustion chamber tilting lifting chuck with a diameter of 2.0m or more, such as... Figure 2 As shown.

[0016] The chuck removal fixture 1 described in this embodiment has an L-shaped cross-section and is installed in the process hole on the side of the housing skirt. One surface of the chuck removal fixture 1 is an arc surface, which fits tightly against the housing surface. Two positioning holes 2 are designed on the arc surface, and two fixing bolts 4 are used to fasten the chuck removal fixture 1 to the housing surface. Figure 1 As shown.

[0017] The other side of the chuck disassembly fixture 1 is a flat surface with a reverse-mount screw hole 3. The reverse-mount bolt 5 is installed in the reverse-mount screw hole 3, and tightened to press against the metal chuck 6. Further, slowly apply force to the reverse-mount bolt 5 to disengage the metal chuck 6 from the non-metallic molded part of the housing. Figure 1 As shown.

[0018] Simultaneously, four sets of chuck disassembly fixtures 1 are used, evenly distributed in four positions around the housing, and the metal chucks 6 are slowly lifted and removed.

[0019] The contents not described in detail in this utility model specification are common knowledge to those skilled in the art.

[0020] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solutions of the present invention by utilizing the methods and techniques disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention shall fall within the protection scope of the technical solutions of the present invention.

Claims

1. A dismounting tool for a turnover spreader cartridge, characterized in that, The profile of the dismounting tool is L-shaped, is installed in the process hole on the side surface of the shell skirt end, one of the surfaces of the dismounting tool is an arc surface, and is closely attached to the surface of the shell; the arc surface is designed with a positioning hole, a fixing bolt is used to fasten the chuck dismounting tool on the surface of the shell; the other surface of the dismounting tool is a plane, is designed with a counter-bore hole, a counter-bore bolt is installed in the counter-bore hole, and the counter-bore bolt is tightened to tightly abut against the metal chuck.

2. The dismounting tool according to claim 1, characterized in that Multiple sets of dismounting tools are evenly installed at multiple positions in the circumferential direction of the shell, and are respectively counter-thrust by counter-bore bolts to remove the metal chuck.

3. The disassembly tool according to claim 1, wherein The width of the plane is smaller than that of the arc surface.

4. The disassembly tool according to claim 1, wherein The arc surface is designed with two positioning holes.

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