High-voltage switch shell and high-voltage switch
Through hydraulic forming process and straight seam welding technology, combined with the strengthened convex hull design, the problems of difficult to control welding deformation of traditional high-pressure switch shells and low structural strength are solved, achieving efficient and accurate molding and production.
Patent Information
- Application Number
- CN202420251078.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-01
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-02-01
AI Technical Summary
The welding deformation of traditional high-voltage switch shells is difficult to control, the structural strength is low, the welding is time-consuming and labor-intensive, and the production efficiency is low.
The cylinder-shaped shell is manufactured by hydraulic molding process, and the flat plate is welded directly after rolling and then combining with the reinforced convex hull set in the mold to achieve one-time molding, simplifying the process and improving efficiency.
It achieves good processing consistency, few welds, high sealing performance, high structural strength, improved production efficiency and molding accuracy, and reduces elastic deformation.
Smart Images
Figure CN222927364U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of the housing of a switching device, in particular to a high-voltage switch housing and a high-voltage switch. Background Art
[0002] In the high-voltage switch industry, the protection of the product housing directly affects the electrical performance of the product. Poor housing protection can easily lead to internal corrosion of the product during thunderstorms or in high-salt-fog and humid areas, causing the product to malfunction and damaging the power grid equipment. At present, in the 10KV standardization scheme issued by the Equipment Department of the State Grid, the protection level is gradually improved, and the sealing performance and reliable operation performance of the switch are continuously enhanced.
[0003] Common housings are usually formed in the following two ways. One is to process a plate into a cylindrical wall required for a cylinder through a sheet metal process, and then weld the cylindrical walls into the required cylinder. The cylinder formed in this way has more welds, and it is difficult to control the welding deformation of the cylindrical wall; at the same time, the processing cost of the cylinder is relatively high, which is not conducive to controlling the production cost of the product. The other way is to form the cylinder through a casting process. However, the cast housing is relatively heavy. In order to reduce the weight, technicians generally choose cast aluminum as the housing material, which will cause a significant increase in the processing cost of the housing; and the casting mold of the housing is complex, resulting in a further increase in the processing cost of the housing.
[0004] Therefore, the traditional coaxial housing structure is as Figure 1 shown: the cylindrical housing 11 is formed into a square cylinder structure by sheet metal bending and then welding. The casing wall of the cylindrical housing 11 is provided with a bushing mounting hole 22. After welding and forming, the springback amount is large, and it needs to be corrected repeatedly. The welding deformation is difficult to control, the welded joints formed by welding are numerous, the structural strength is low, and the aesthetics is poor. Moreover, the welding process requires repeated turning, which is time-consuming and laborious, and the production efficiency is low. Content of the Utility Model
[0005] The purpose of the utility model is to provide a high-voltage switch housing, which is used to solve the problems that the welding deformation of the existing traditional coaxial housing structure is difficult to control, the structural strength is low, the welding is time-consuming and laborious, and the production efficiency is low.
[0006] The high-voltage switch housing of the utility model adopts the following technical scheme: a high-voltage switch housing, including a hydraulically formed cylindrical housing, and reinforcing convex hulls are formed on the cylindrical housing.
[0007] Further, the cylindrical housing is a square cylinder, and the reinforcing convex hulls include casing wall reinforcing convex hulls located on the casing wall of the cylindrical housing.
[0008] Further, the casing wall reinforcing convex hull is of an I-shaped structure.
[0009] Further, a transition fillet structure is provided between adjacent surfaces of the cylindrical housing.
[0010] Further, the reinforcing convex hull includes a transition reinforcing convex hull located at the transition fillet structure.
[0011] Further, the transition reinforcing convex hull is a linear convex hull along the length direction of the transition fillet structure.
[0012] Further, the end of the cylindrical shell is a necked-down opening.
[0013] Further, the necked-down opening is a circular opening.
[0014] The high-voltage switch housing of the present utility model is a newly designed high-voltage switch housing. The beneficial effects of the high-voltage switch housing of the present utility model are as follows: The cylindrical shell is formed by straight-seam welding after rolling a flat plate. There is only one weld seam in the whole forming process, with good processing consistency, few weld seams, and high sealing performance. Then, using a hydraulic forming machine and matching with the external shape mold of the cylindrical shell, high-pressure liquid is injected into the cylindrical shell, and it expands outward from the inside into a specific shape, which can achieve one-time forming. The forming process is simple and efficient. By setting reinforcing convex hulls in the mold, the cylindrical shell is formed with reinforcing convex hulls to strengthen the overall strength of the shell surface of the shell, and the reinforcing convex hulls also increase the internal space and reduce elastic deformation.
[0015] The purpose of the present utility model is to provide a high-voltage switch, which is used to solve the problems of difficult control of welding deformation, low structural strength, time-consuming and laborious welding, and low production efficiency in the existing high-voltage switch housing with a traditional coaxial box-type housing structure.
[0016] The high-voltage switch of the present utility model adopts the following technical solution: A high-voltage switch includes a high-voltage switch housing, and the high-voltage switch housing includes a hydraulically formed cylindrical shell, and a reinforcing convex hull is formed on the cylindrical shell.
[0017] Further, the cylindrical shell is a square cylinder, and the reinforcing convex hull includes a shell wall reinforcing convex hull located on the shell wall of the cylindrical shell.
[0018] Further, the shell wall reinforcing convex hull is an I-shaped structure.
[0019] Further, a transition fillet structure is provided between adjacent surfaces of the cylindrical shell.
[0020] Further, the reinforcing convex hull includes a transition reinforcing convex hull located at the transition fillet structure.
[0021] Further, the transition reinforcing convex hull is a linear convex hull along the length direction of the transition fillet structure.
[0022] Further, the end of the cylindrical shell is a necked-down opening.
[0023] Further, the necked-down opening is a circular opening.
[0024] The high-voltage switch of the present utility model is an improvement on the existing high-voltage switch. The beneficial effects of the high-voltage switch of the present utility model are as follows: The cylindrical shell of the high-voltage switch is formed by straight-seam welding after the flat plate is rolled into a circle. There is only one weld in the whole forming process, with good processing consistency, few welds, and high sealing performance. Then, using a hydraulic forming machine and a die conforming to the shape of the cylindrical shell, high-pressure liquid is injected into the cylindrical shell, and it expands outward from the inside to form a specific shape, which can achieve one-time forming. The forming process is simple and efficient. By setting reinforcing convex hulls in the die, the cylindrical shell is formed with reinforcing convex hulls to enhance the overall strength of the shell surface of the shell, and the reinforcing convex hulls also increase the internal space and reduce elastic deformation. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 It is a schematic structural diagram of the original coaxial box shell;
[0026] Figure 2 It is a schematic structural diagram of an embodiment of the high-voltage switch shell of the present utility model;
[0027] Figure 3 is Figure 2 side view of;
[0028] Figure 4 is Figure 2 top view of.
[0029] In the figure: 1, cylindrical shell; 2, bushing positioning hole; 3, bushing mounting hole; 4, shell wall reinforcing convex hull; 5, transition reinforcing convex hull; 6, transition fillet structure; 7, necking; 11, cylindrical shell; 22, bushing mounting hole. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0030] The features and performance of the present utility model will be further described in detail below in conjunction with the embodiments.
[0031] First, a general description of the technical solution of the present utility model is given:
[0032] There are mainly two common ways to process the shell. One is to process the plate into the barrel wall required for the cylinder through sheet metal technology, and then weld the barrel walls into the required cylinder. The cylinder formed in this way has more welds, and it is difficult to control the welding deformation of the barrel wall; at the same time, the processing cost of the cylinder is relatively high, which is not conducive to controlling the production cost of the product. The other way is to form the cylinder through casting technology. However, the cast shell is relatively heavy. In order to reduce the weight, technicians generally choose cast aluminum as the shell material, which will lead to a significant increase in the processing cost of the shell; and the casting mold of the shell is complex, resulting in a further increase in the processing cost of the shell.
[0033] The traditional coaxial box shell structure is as Figure 1As shown in the figure: The cylindrical shell 11 is formed into a square tube structure by sheet metal bending and then butt welding. The sleeve mounting holes 22 are provided on the shell wall of the cylindrical shell 11. After welding and forming, the springback amount is large, and repeated correction is required. The welding deformation is difficult to control. There are many butt welding seams in the forming, the structural strength is low, the aesthetics is poor, and the welding process requires repeated turning, which is time-consuming and laborious, and the production efficiency is low.
[0034] Based on the above problems, the present utility model designs a high-voltage switch housing, which includes a cylindrical shell formed by hydroforming. The cylindrical shell is first formed by straight-seam welding after the flat plate is rolled into a circle. There is only one weld seam in the whole forming process, with good processing consistency, few weld seams, and high sealing performance. Then, a hydroforming machine is used in cooperation with the external mold of the cylindrical shell to inject high-pressure liquid into the cylindrical shell, and it expands outward from the inside into a specific shape, which can achieve one-time forming. The forming process is simple and efficient. Reinforcing convex hulls are formed on the cylindrical shell. By setting the reinforcing convex hulls in the mold, the cylindrical shell is formed with reinforcing convex hulls to enhance the overall strength of the shell surface of the shell, and the reinforcing convex hulls also increase the internal space and reduce elastic deformation.
[0035] Specific embodiments of the high-voltage switch of the present utility model:
[0036] The high-voltage switch of the present utility model includes a high-voltage switch housing. The structural schematic diagram of the high-voltage switch housing is as Figures 2 - 4 shown. The high-voltage switch housing includes a cylindrical shell 1. The inside of the cylindrical shell 1 has a space for installing internal mechanisms, sensors, sleeves and other components. The cylindrical shell 1 is a cylindrical shell formed by hydroforming. Specifically, the steel plate is first rolled into a cylindrical shape by a rolling machine. The cylindrical shape is easy to seal and weld. After the opening of the cylinder is clamped and closed by a straight-seam welding positioning tooling, plasma or laser is used for straight-seam welding. The weld seam is flat and beautiful, which is easy for subsequent hydroforming processing. The forming process is simple and the production efficiency is high.
[0037] Since the mold of the hydraulic shell can be designed according to the needs of the cylindrical shell and processed into a specific shape at one time, in order to enhance the structural strength and improve the anti-deformation ability, reinforcing convex hulls are formed on the cylindrical shell 1 to enhance the overall strength of the shell surface of the shell, and the reinforcing convex hulls also increase the internal space and reduce elastic deformation. Compared with the reinforcing structure of the welding forming method that also requires additional welding of the reinforcing structure, the hydroforming is formed at one time, the process is simple, and the reinforcing convex hull and the cylindrical shell 1 are integrated, with high structural strength. Specifically, compared with the stamping and welding forming, the weight can be reduced by 20%, the production efficiency is high, the forming accuracy is high, and the material undergoes plastic deformation during the forming process, which can avoid the welding deformation and bending springback that occur in the welding process.
[0038] In this embodiment, preferably, the cylindrical shell 1 is a hydraulically formed cylindrical shell 1. Hydraulic forming is convenient for obtaining materials, has low cost, and the processing technology mold is simple and easy to operate. After forming, it only needs to be air-dried. Of course, in other embodiments, an oil pressure forming method can also be used.
[0039] Specifically, the cylindrical shell 1 has a square tube structure. The square structure is convenient for subsequent internal addition of a frame structure for positioning, the installation structure is simple, and the processing difficulty is low. When considering where to set the reinforcing convex hull on the cylindrical shell 1, since the wall surface size of the shell wall of the cylindrical shell 1 is large, deformation is likely to occur. Preferably, the reinforcing convex hull includes a shell wall reinforcing convex hull 4 located on the shell wall of the cylindrical shell 1. Setting the reinforcing convex hull on the shell wall weakens the deformation ability of the shell wall and makes the assembly space at the shell wall larger.
[0040] When designing the structure of the reinforcing convex hull of the shell wall of the cylindrical shell 1, in order to further improve the reinforcing effect and make the structure strength of the shell wall of the cylindrical shell 1 higher and less likely to deform, preferably, the shell wall reinforcing convex hull 4 has an I-shaped structure. The two perpendicular sides of the I-shaped structure strengthen both the length and width directions of the entire wall surface, and the structure is relatively simple to manufacture. Of course, in other embodiments, a whole-piece square reinforcing convex structure or a triangular reinforcing convex can also be used to improve the structure strength and anti-deformation ability.
[0041] The original welded shell structure is a square cylinder structure, which is prone to stress deformation at the corners, and the internal space at the corners is not easy to utilize. Therefore, in this embodiment, preferably, the adjacent surfaces of the cylindrical shell 1 have a transitional rounded corner structure 6. This can avoid stress concentration. The transitional rounded corner structure 6 has a stable structure, a large internal space, and is convenient for manufacturing and operation during the hydraulic forming process to realize the transition from a cylinder to a square structure, simplifying the process.
[0042] Based on the fact that the adjacent surfaces of the cylindrical shell 1 have a transitional rounded corner structure 6, in order to further improve the structure strength here, preferably, the reinforcing convex hull includes a transitional reinforcing convex hull 5 located at the transitional rounded corner structure 6. The reinforcing convex hull is designed at the position of the transitional rounded corner structure 6 to enhance the structure strength at the transitional rounded corner position and prevent internal deformation.
[0043] The position of the transitional rounded corner structure 6 is a long arc structure, which can already ensure good structure strength and anti-deformation ability. However, in order to further improve the structure strength between adjacent surfaces, preferably, the transitional reinforcing convex hull 5 is set as a linear convex hull along the length direction of the transitional rounded corner structure 6. The long side of the linear convex hull extends along the long side of the transitional rounded corner structure 6, so that it just fits with the transitional rounded corner structure 6, increasing the internal space, enhancing the shell strength, and reducing elastic deformation.
[0044] The end of the cylindrical housing 1 can be the same as that of the existing housing, where the end is an extension of the cylindrical wall of the housing with the same dimensions. However, since the end of the cylindrical housing 1 is used for assembling the sealing cover, it requires high structural strength to ensure good sealing performance. Preferably, the end of the cylindrical housing 1 is a necked-down portion 7. In this way, during the hydroforming process, the end of the cylindrical housing 1 can have a smaller expansion coefficient, facilitating the assembly of the sealing cover and increasing the structural thickness to ensure good structural strength.
[0045] Moreover, for ease of assembly and good sealing performance, the circular cover body and the cylinder are more easily matched. In this embodiment, preferably, the necked-down portion 7 is set as a round opening to ensure the reliability and convenience of assembly. Of course, in other embodiments, other shapes such as square and hexagon can also be used according to requirements.
[0046] In this embodiment, three groups of sleeve positioning holes 2 and sleeve mounting holes 3 are provided on two of the shell walls of the cylindrical housing 1. The sleeve positioning holes 2 are mainly used for positioning the installation of the incoming and outgoing line sleeves, ensuring accurate positioning of the sleeves and a horizontal end face, preventing errors during the installation process, and facilitating product assembly. The sleeve mounting holes 3 are designed with hole diameters according to the sleeve structure and have an inward flanging structure, effectively enhancing the strength of the plate surface. The sleeve is matched with a commercially available O-ring to meet the requirements of the water immersion test.
[0047] Through the above description of the specific embodiment of the high-voltage switch of the present invention, it can be seen that the cylindrical housing of the high-voltage switch of the present invention is formed by straight-seam welding after rolling a flat plate into a circle. There is only one weld in the whole forming process, with good processing consistency, fewer welds, and high sealing performance. Then, by using a hydroforming machine in cooperation with the external shape mold of the cylindrical housing and injecting high-pressure liquid into the cylindrical housing, it expands outward from the inside into a specific shape, and can achieve one-time forming. The forming process is simple and efficient. By setting strengthening convex bumps in the mold, the cylindrical housing is formed with strengthening convex bumps to enhance the overall strength of the shell surface of the housing, and the strengthening convex bumps also increase the internal space and reduce elastic deformation.
[0048] The embodiment of the high-voltage switch housing of the present invention is the same as the embodiment of the high-voltage switch housing in the above high-voltage switch, so it will not be described again.
[0049] The above is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention is subject to the claims. All equivalent structural changes made by using the description and drawings of the present invention should be included in the protection scope of the present invention by the same token.
Claims
1. A high voltage switch housing, characterized in that: It includes a hydraulically formed cylindrical shell, on which a reinforcing bulge is formed, the cylindrical shell is in a square cylindrical shape, the reinforcing bulge includes a shell wall reinforcing bulge located on the shell wall of the cylindrical shell, the shell wall reinforcing bulge is an I-shaped structure, adjacent surfaces of the cylindrical shell are transitional fillet structures, the reinforcing bulge includes a transitional reinforcing bulge located in the transitional fillet structure, the transitional reinforcing bulge is a linear bulge along the length direction of the transitional fillet structure, and the end of the cylindrical shell is a necked opening, which is a round opening.
2. A high voltage switch, comprising a high voltage switch housing, characterized in that: The high-voltage switch housing includes a hydraulically formed cylindrical housing with a reinforcing bulge formed on the cylindrical housing. The cylindrical housing is in a square cylindrical shape. The reinforcing bulge includes a shell wall reinforcing bulge located on the shell wall of the cylindrical housing. The shell wall reinforcing bulge is an I-shaped structure. Adjacent surfaces of the cylindrical housing are provided with a transition fillet structure. The reinforcing bulge includes a transition reinforcing bulge located in the transition fillet structure. The transition reinforcing bulge is a linear bulge along the length direction of the transition fillet structure. The end of the cylindrical housing is a necked opening, and the necked opening is a round opening.