A transformer housing and a method of manufacturing the same

Abstract

The application belongs to the technical field of transformer shell, and discloses a transformer shell, which comprises a shell body, lateral heat dissipation plates are fixedly installed on the two sides of the shell body, and heat dissipation openings are formed on the front face and the back face of the shell body. The application is characterized in that the movable plate is sleeved in the first heat dissipation frame, the movable plate is connected with the spring, the storage cylinder is installed on the front face of the shell body, the pressure oil is stored in the storage cylinder, the push plate in the storage cylinder is matched, the push plate drives the pressure oil to be extruded into the first heat dissipation frame through the curved pipe and the first distribution sleeve when the push rod is manually pushed, the movable plate reciprocates in the process of repeated pushing and relaxing, the hot air in the shell body is blown out and the ambient air is sucked in when the movable plate reciprocates, the mixing and cooling of the hot air in the shell body are repeatedly realized, the forced cooling is completed, the cooling efficiency is greatly improved, the quick cooling can be manually realized when the maintenance is needed, the subsequent maintenance operation is facilitated, the maintenance efficiency is improved, and the use effect is good.

Description

Technical Field

[0001] This invention belongs to the field of transformer casing technology, specifically a transformer casing and its preparation method. Background Technology

[0002] A transformer is a device that uses the principle of electromagnetic induction to change alternating current voltage. Its main components are the primary coil, the secondary coil, and the iron core (magnetic core). Its main functions include voltage transformation, current transformation, impedance transformation, isolation, and voltage stabilization (magnetic saturation transformer). The transformer casing serves to house the internal electrical components and protect them.

[0003] In existing technology, transformer casings typically employ four sets of ring-shaped heat dissipation plates during operation. This increases the heat dissipation area and provides a certain degree of heat protection for the transformer's internal components. However, during actual maintenance and inspection, under certain high-temperature conditions, heat dissipation from the transformer's interior is not significant. Before maintenance operations, it is necessary to disassemble the top of the transformer casing to allow for some degree of ventilation, so that the internal electrical components can be cooled down before operation, inspection, maintenance, or replacement. However, the actual time spent waiting for internal heat dissipation is quite long, significantly reducing the actual maintenance time and efficiency, resulting in poor performance.

[0004] Furthermore, current outdoor transformers are installed using a top cover with bolts for sealing. However, when used outdoors, the bolts on the top of the transformer casing are exposed to wind and sun, gradually leading to oxidation and corrosion. This causes the bolts and threaded holes to harden and corrode, making it difficult to disassemble and reassemble the transformer casing during subsequent inspection and maintenance. Moreover, it is difficult to re-install stably after disassembly. In practice, the threaded holes are severely damaged, requiring the replacement of the top sealing cover of the transformer casing and other components such as bolts. As a result, the stable service life after installation is short, the aging and damage rate is too high, and the performance is unsatisfactory. Summary of the Invention

[0005] The purpose of this invention is to provide a transformer casing and its manufacturing method to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a transformer casing and its manufacturing method, comprising a casing, wherein lateral heat dissipation plates are fixedly installed on both sides of the casing, heat dissipation vents are provided on the front and back of the casing, a first heat dissipation frame and a second heat dissipation frame are fixedly connected to the front and back of the casing respectively, the first heat dissipation frame and the second heat dissipation frame are connected to the heat dissipation vents, the end faces of the first heat dissipation frame and the second heat dissipation frame are fixedly connected to the end faces of the first heat dissipation frame and the second heat dissipation frame respectively, a storage cylinder is fixedly installed on the front of the casing, and the storage cylinder and a first... A curved tube is fixedly connected between the numbered distribution sleeves. A push rod is movably sleeved on the front of the storage cylinder. A push plate is fixedly connected to the inner end face of the push rod. The push plate is movably sleeved inside the storage cylinder. A movable plate is movably sleeved on the inner surface of the first heat dissipation frame. A fixed plate is fixedly connected to the inner surface of one side of the heat dissipation vent. A spring is fixedly connected between the fixed plate and the movable plate. A side tube is fixedly connected to the side of the second distribution sleeve. A sealing plug is threaded onto the end face of the side tube. An installation frame is fixedly installed on the top surface of the housing. A sealing cover is provided on the top surface of the installation frame.

[0007] First embodiment: as follows Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, when forced internal heat dissipation is required, unscrew the sealing plug at the side pipe and manually push the push rod. This causes the push rod to move the push plate, which in turn squeezes the internal pressure oil in the storage cylinder. As the pressure oil is squeezed through the curved pipe to the first distribution frame, the pressure oil in the first distribution sleeve flows into the first heat dissipation frame. As the oil pressure in the first heat dissipation frame increases, it pushes the internal movable plate to move and compresses the spring. When pushed to the limit position, quickly release the push rod, causing the spring to quickly and elastically return to its original position. This allows the movable plate to quickly return to its original position and draw in the gas inside the shell. This allows ambient air to be drawn into the shell through the side pipe, achieving gas mixing inside the shell. Repeatedly pushing and releasing the push rod allows the hot air inside the shell to mix with the drawn-in air, thus cooling down the shell and completing forced heat dissipation.

[0008] First, a movable plate is fitted into the No. 1 heat dissipation frame and connected to it by a spring. A storage cylinder is installed on the front of the housing, storing pressurized oil. A push plate in the storage cylinder, when manually pushed, forces the push plate to expel the pressurized oil through the curved pipe and the No. 1 distribution sleeve into the No. 1 heat dissipation frame. During repeated pushing and releasing, the movable plate reciprocates, blowing out hot air from inside the housing and drawing in ambient air, repeatedly mixing and cooling the internal hot air to achieve forced cooling. This significantly improves cooling efficiency. When maintenance is required, rapid cooling can be achieved manually, facilitating subsequent maintenance operations and improving maintenance efficiency. The system is highly effective.

[0009] Preferably, the top surface of the mounting frame is provided with a threaded hole, and the top surface of the sealing cover is provided with a sleeve hole. A bolt is movably fitted onto the inner surface of the sleeve hole, and the lower end of the bolt is threaded into the threaded hole. The entire transformer housing is installed and fixed by using the bolt, and a sealed installation is achieved in conjunction with the sealing cover.

[0010] Preferably, the top surface of the sealing cover has an annular groove, and a magnetic ring is fixedly sleeved inside the annular groove. The annular groove is located outside the sleeve hole, and a protective cover is movably sleeved on the inner surface of the annular groove. The protective cover is located outside the bolt, and the protective cover and the magnetic ring are magnetically attracted to each other. The initial attraction and fixation of the protective cover is achieved by using the magnetic ring, and the protective cover is used to seal the bolt, isolate air, and reduce oxidation and corrosion.

[0011] Preferably, the sealing cover has a connecting cavity inside, a connecting groove on the top surface of the sealing cover, a connecting plate fixedly sleeved on the inner surface of the connecting groove, a through hole on the top surface of the connecting plate, the connecting groove communicating with the connecting cavity, and the connecting cavity communicating with the annular groove. By using the connecting groove and the connecting plate to connect multiple sets of connecting cavities, unified suction can be achieved.

[0012] Preferably, the top surface of the magnetic ring has a first notch, and the top surface of the sealing cover has a second notch. The second notch is located to one side of the first notch and inside the protective cover. By utilizing the first and second notches to adapt to the connection of the communicating cavity, it is ensured that air can be drawn from the protective cover during suction, thereby forming a low-pressure environment, strengthening the seal while reducing the oxygen content and avoiding oxidation.

[0013] Preferably, the bottom surface of the sealing cover has a bottom hole that communicates with a connecting groove. A solenoid valve is fixedly installed on the bottom surface of the sealing cover and is movably connected to the bottom hole. A suction mechanism is fixedly installed on the top surface of the sealing cover. The suction direction is controlled by controlling the opening and closing of the bottom hole using the solenoid valve.

[0014] Preferably, the top surface of the mounting frame is provided with a sealing groove, and the bottom surface of the sealing cover is fixedly connected with a sealing gasket. The outer surface of the sealing gasket is movably sleeved with the sealing groove. The sealing groove is located outside the threaded hole. By using the sealing groove and the sealing gasket to movably sleeve each other, and by using the sealing gasket made of elastic material to press into the sealing groove, the actual sealing effect is enhanced.

[0015] Preferably, the suction mechanism includes a top sleeve, a suction plate, and an adjusting rod. The top sleeve is fixedly connected to the top surface of the sealing cover and located outside the through hole. The suction plate is movably sleeved inside the top sleeve. The bottom surface of the adjusting rod is fixedly connected to the suction plate, and the outer surface of the adjusting rod is threadedly sleeved with the top sleeve. By rotating the threaded adjusting rod, the suction plate, whose diameter is slightly smaller than the inner diameter of the top sleeve, is driven to continuously suck air from the bottom as the suction plate rises. This, in conjunction with the opening and closing of the solenoid valve, enables the suction of gas from the inside of the housing and the protective cover, respectively.

[0016] Second embodiment: as follows Figure 1 , Figure 3 , Figure 4 , Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10 As shown, when installing the casing of the memory transformer, place the sealing cover on the top surface of the mounting frame, while keeping the sealing gasket fitted in the sealing groove. Then, insert the bolt into the sleeve hole and thread it into the threaded hole on the top surface of the mounting frame. Fit the protective cover into the annular groove on the top surface of the sealing cover, so that the protective cover is magnetically attracted to the magnetic ring. Rotate the adjusting rod in the suction mechanism to make the suction plate rotate upward along the top sleeve, keeping the solenoid valve open, so that the air inside the casing is sucked out. Then close the solenoid valve and continue to rotate the adjusting rod upward, so that the top sleeve sucks the air inside the protective cover through the connecting cavity, so that the protective cover is tightly fitted in the annular groove.

[0017] First, an annular groove is made on the top surface of the sealing cap, and a magnetic ring is fixedly fitted in the groove. The protective cap fits into the groove and is attracted to the top surface of the magnetic ring, thus sealing and protecting the bolts. The sealing cap is connected to the annular groove through a connecting cavity inside. With the first notch on the magnetic ring and the second notch on the top surface of the sealing cap located inside the protective cap, the suction mechanism is rotated to draw air from the connecting cavity. This achieves air suction from the protective cap after fitting, enhancing the stability of the fitting under negative pressure. At the same time, the negative pressure space reduces the amount of contact between the bolts and air. Combined with the sealing method, this effectively reduces the oxidation rate of the bolts after outdoor installation, greatly improving the actual service life and ensuring good stability of the bolts during subsequent disassembly and assembly. This ensures the stable installation of the sealing cap and good performance.

[0018] Furthermore, by utilizing a solenoid valve in conjunction with a bottom hole connected to a connecting slot, manual suction is performed during installation. The solenoid valve is opened and then continuously rotated for suction, reducing the air content inside the casing and thus lowering the overall oxygen content inside the casing. In the event of partial discharge of electrical components during use, the low-oxygen environment effectively prevents internal electrical components from catching fire, greatly reducing the probability of internal combustion and improving the actual protection effect of the transformer casing, resulting in good performance.

[0019] A method for preparing a transformer casing includes the following preparation steps:

[0020] Step 1: Open heat dissipation vents on the front and back of the formed shell, and weld heat dissipation frame 1 and heat dissipation frame 2 to the front and back of the shell respectively, ensuring that heat dissipation frame 1 and heat dissipation frame 2 are connected to the heat dissipation vents. Insert a movable plate connected to a spring into the inside of heat dissipation frame 1, and weld a fixing plate to the other end of the spring, so that the fixing plate is fixedly welded into the heat dissipation vent. Drill holes on the end faces of heat dissipation frame 1 and heat dissipation frame 2 respectively, and weld distribution sleeve 1 and distribution sleeve 2 to the end faces of heat dissipation frame 1 and heat dissipation frame 2 respectively, ensuring that distribution sleeve 1 and distribution sleeve 2 are connected to heat dissipation frame 1 and heat dissipation frame 2 respectively. Weld a connecting side tube to the side of heat dissipation frame 2, so that a threaded sealing plug is installed on the inner surface of the side tube.

[0021] Step 2: Fix the storage cylinder on the front of the shell, and insert the push plate inside the storage cylinder so that the push rod on the side of the push plate is connected to the storage cylinder. Drill a hole on the side of the storage cylinder and fill it with pressurized oil. Weld a curved pipe connecting the drilled hole so that the upper end of the curved pipe is connected to the No. 1 distribution sleeve.

[0022] Step 3: Weld the mounting frame to the top surface of the housing, and make sealing grooves and threaded holes on the top surface of the mounting frame. Make sleeve holes on the top surface of the sealing cover of the transformer housing, so that the size of the sleeve holes and the threaded holes are compatible. Adhere an elastic sealing gasket to the bottom surface of the sealing cover, so that the size of the sealing gasket is adapted to the size and position of the sealing groove, and perform cover matching.

[0023] The beneficial effects of this invention are as follows:

[0024] 1. This invention features a movable plate fitted into a first heat dissipation frame and connected to it by a spring. A storage cylinder is installed on the front of the housing, storing pressurized oil. A push plate within the storage cylinder, when manually pushed, forces the pressurized oil through a curved pipe and a first distribution sleeve into the first heat dissipation frame. Repeated pushing and releasing causes the movable plate to reciprocate, blowing out hot air from inside the housing and drawing in ambient air, thus achieving forced cooling by mixing the internal hot air. This significantly improves cooling efficiency. When maintenance is required, rapid cooling can be achieved manually, facilitating subsequent maintenance operations and improving maintenance efficiency. The invention offers excellent performance.

[0025] 2. This invention achieves bolt sealing protection by creating an annular groove on the top surface of the sealing cap and fixing a magnetic ring within the groove. The protective cap fits into the groove and adheres to the top surface of the magnetic ring. The sealing cap's internal cavity connects to the annular groove. Combined with a first notch on the magnetic ring and a second notch on the top surface of the sealing cap located inside the protective cap, a suction mechanism is rotated to draw air from the connecting cavity. This suction effectively removes air from the protective cap after it is fitted, enhancing stability under negative pressure. The negative pressure space also reduces the amount of contact between the bolt and air. This sealing method effectively reduces the oxidation rate of the bolt after outdoor installation, significantly improving its service life and ensuring good stability during subsequent disassembly and assembly. This ensures stable installation of the sealing cap and excellent performance.

[0026] 3. This invention utilizes a solenoid valve in conjunction with a bottom hole connected to a connecting groove. During installation, manual suction is performed by controlling the solenoid valve to open and then continuously rotate and suction, reducing the air content inside the casing. This reduces the overall oxygen content inside the casing. In the event of partial discharge of electrical components, the low-oxygen environment effectively prevents internal electrical components from catching fire, greatly reducing the probability of internal combustion and improving the actual protection effect of the transformer casing. The invention has good performance. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the back of the present invention;

[0029] Figure 3 This is a cross-sectional schematic diagram of the present invention;

[0030] Figure 4 This is a schematic diagram of the housing of the present invention;

[0031] Figure 5 This is an exploded schematic diagram of the storage cylinder of the present invention;

[0032] Figure 6 This is a cross-sectional schematic diagram of the sealing cap of the present invention;

[0033] Figure 7 for Figure 6 Enlarged structural diagram at point A;

[0034] Figure 8 for Figure 6 Enlarged structural diagram at point B;

[0035] Figure 9 This is an exploded view of the sealing cap of the present invention;

[0036] Figure 10This is a schematic diagram of the magnetic ring of the present invention.

[0037] In the diagram: 1. Shell; 2. Side heat sink; 3. Heat sink vent; 4. Heat sink frame 1; 5. Heat sink frame 2; 6. Distribution sleeve 1; 7. Storage cylinder; 8. Curved tube; 9. Push rod; 10. Push plate; 11. Fixed plate; 12. Movable plate; 13. Spring; 14. Distribution sleeve 2; 15. Side tube; 16. Sealing plug; 17. Mounting frame; 18. Sealing cover; 19. Sleeve hole; 20. Threaded hole; 21. Bolt; 22. Annular groove; 23. Magnetic ring; 24. Notch 1; 25. Protective cover; 26. Notch 2; 27. Connecting cavity; 28. Connecting plate; 29. ​​Through hole; 30. Suction mechanism; 301. Top sleeve; 302. Suction plate; 303. Adjusting rod; 31. Bottom hole; 32. Solenoid valve; 33. Sealing gasket; 34. Sealing groove; 35. Connecting groove. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] like Figures 1 to 10 As shown, this embodiment of the invention provides a transformer housing and its manufacturing method, including a housing 1. Side heat dissipation plates 2 are fixedly installed on both sides of the housing 1. Heat dissipation openings 3 are provided on both the front and back of the housing 1. A first heat dissipation frame 4 and a second heat dissipation frame 5 are fixedly connected to the front and back of the housing 1, respectively. Both the first and second heat dissipation frames 4 and 5 are connected to the heat dissipation openings 3. A first distribution sleeve 6 and a second distribution sleeve 14 are fixedly connected to the end faces of the first and second heat dissipation frames 4 and 5, respectively. A storage cylinder 7 is fixedly installed on the front of the housing 1, and the storage cylinder 7 and the first distribution sleeve 6 are fixedly connected. There is a curved tube 8. A push rod 9 is movably sleeved on the front of the storage cylinder 7. A push plate 10 is fixedly connected to the inner end face of the push rod 9. The push plate 10 is movably sleeved inside the storage cylinder 7. A movable plate 12 is movably sleeved on the inner surface of the first heat dissipation frame 4. A fixed plate 11 is fixedly connected to the inner surface of the heat dissipation port 3 on one side. A spring 13 is fixedly connected between the fixed plate 11 and the movable plate 12. A side tube 15 is fixedly connected to the side of the second distribution sleeve 14. A sealing plug 16 is threaded onto the end face of the side tube 15. An installation frame 17 is fixedly installed on the top surface of the housing 1. A sealing cover 18 is provided on the top surface of the installation frame 17.

[0040] First embodiment: as follows Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, when forced internal heat dissipation is required, unscrew the sealing plug 16 at the side tube 15, manually push the push rod 9, causing the push rod 9 to move the push plate 10, which in turn squeezes the internal pressure oil in the storage cylinder 7. As the pressure oil is squeezed through the curved pipe 8 into the first distribution frame 6, the pressure oil in the first distribution sleeve 6 enters the first heat dissipation frame 4. As the oil pressure in the first heat dissipation frame 4 increases, it pushes the internal movable plate 12 to move and compresses the spring 13. When pushed to the limit position, quickly release the push rod 9, causing the spring 13 to quickly and elastically return to its original position. This allows the movable plate 12 to quickly return to its original position and draw in the gas inside the shell 1, allowing ambient air to be drawn into the shell 1 through the side tube 15, thus achieving gas mixing inside the shell 1. Repeatedly pushing and releasing the push rod 9 allows the hot air inside the shell 1 to mix with the drawn-in air and cool down, completing the forced heat dissipation.

[0041] First, by fitting a movable plate 12 into the first heat dissipation frame 4 and connecting it with a spring 13, and installing a storage cylinder 7 on the front of the housing 1, pressurized oil is stored in the storage cylinder 7. In conjunction with the push plate 10 in the storage cylinder 7, when the push rod 9 is manually pushed, the push plate 10 drives the pressurized oil through the curved pipe 8 and the first distribution sleeve 6 to the first heat dissipation frame 4. During the repeated pushing and releasing process, the movable plate 12 moves back and forth, blowing out the hot air inside the housing 1 and drawing in the ambient air, repeatedly achieving the mixing and cooling of the internal hot air, thereby completing forced cooling, which greatly improves the cooling efficiency. When maintenance is required, rapid cooling can be achieved manually, which facilitates subsequent maintenance operations, improves maintenance efficiency, and has a good effect.

[0042] The mounting frame 17 has a threaded hole 20 on its top surface and a sleeve hole 19 on its top surface. A bolt 21 is movably fitted onto the inner surface of the sleeve hole 19. The lower end of the bolt 21 is threaded into the threaded hole 20. The bolt 21 is used to complete the overall installation and fixation of the transformer casing and achieves a sealed installation in conjunction with the sealing cover 18.

[0043] The sealing cover 18 has an annular groove 22 on its top surface. A magnetic ring 23 is fixedly sleeved inside the annular groove 22. The annular groove 22 is located outside the sleeve hole 19. A protective cover 25 is movably sleeved on the inner surface of the annular groove 22. The protective cover 25 is located outside the bolt 21. The protective cover 25 and the magnetic ring 23 are magnetically attracted. The magnetic ring 23 is used to achieve the initial attraction and fixation of the protective cover 25. The protective cover 25 is used to seal the bolt 21, isolate air, and reduce oxidation and corrosion.

[0044] The sealing cover 18 has a connecting cavity 27 inside, and a connecting groove 35 on the top surface of the sealing cover 18. A connecting plate 28 is fixedly sleeved on the inner surface of the connecting groove 35. A through hole 29 is opened on the top surface of the connecting plate 28. The connecting groove 35 is connected to the connecting cavity 27, and the connecting cavity 27 is connected to the annular groove 22. By using the connecting groove 35 and the connecting plate 28 to connect multiple sets of connecting cavities 27, unified suction can be achieved.

[0045] The magnetic ring 23 has a first notch 24 on its top surface, and the sealing cover 18 has a second notch 26 on its top surface. The second notch 26 is located to one side of the first notch 24 and inside the protective cover 25. By utilizing the first notch 24 and the second notch 26 to connect the connecting cavity 27, air can be drawn from the protective cover 25 during suction, thereby creating a low-pressure environment, strengthening the seal, reducing the oxygen content, and preventing oxidation.

[0046] The sealing cover 18 has a bottom hole 31 on its bottom surface, which is connected to the connecting groove 35. A solenoid valve 32 is fixedly installed on the bottom surface of the sealing cover 18 and is movably connected to the bottom hole 31. A suction mechanism 30 is fixedly installed on the top surface of the sealing cover 18. The suction direction is controlled by controlling the opening and closing of the bottom hole 31 using the solenoid valve 32.

[0047] The top surface of the mounting frame 17 is provided with a sealing groove 34, and the bottom surface of the sealing cover 18 is fixedly connected with a sealing gasket 33. The outer surface of the sealing gasket 33 is movably sleeved with the sealing groove 34. The sealing groove 34 is located outside the threaded hole 20. By using the movable sleeve between the sealing groove 34 and the sealing gasket 33, and by using the elastic material of the sealing gasket 33 to press into the sealing groove 34, the actual sealing effect is enhanced.

[0048] The suction mechanism 30 includes a top sleeve 301, a suction plate 302, and an adjusting rod 303. The top sleeve 301 is fixedly connected to the top surface of the sealing cover 18 and located outside the through hole 29. The suction plate 302 is movably sleeved inside the top sleeve 301. The bottom surface of the adjusting rod 303 is fixedly connected to the suction plate 302, and the outer surface of the adjusting rod 303 is threadedly sleeved with the top sleeve 301. By rotating the threaded adjusting rod 303, the suction plate 302, whose diameter is slightly smaller than the inner diameter of the top sleeve 301, is driven. As the suction plate 302 rises, it continuously sucks in the air at the bottom, thereby cooperating with the opening and closing of the solenoid valve 32 to realize the suction of gas inside the housing 1 and the protective cover 25 respectively.

[0049] Second embodiment: as follows Figure 1 , Figure 3 , Figure 4 , Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10As shown, when installing the casing of the memory transformer, the sealing cover 18 is placed on the top surface of the mounting frame 17, while keeping the sealing gasket 33 fitted in the sealing groove 34. Then, the bolt 21 is inserted into the sleeve hole 19 and threaded into the threaded hole 20 on the top surface of the mounting frame 17. The protective cover 25 is fitted into the annular groove 22 on the top surface of the sealing cover 18, so that the protective cover 25 and the magnetic ring 23 are magnetically attracted. The adjusting rod 303 in the suction mechanism 30 is rotated, so that the suction plate 302 rotates and moves upward along the top sleeve 301, keeping the solenoid valve 32 open, so that the air inside the casing 1 is sucked out. Then the solenoid valve 32 is closed, and the adjusting rod 303 is rotated upward, so that the top sleeve 301 sucks the air inside the protective cover 25 through the connecting cavity 27, so that the protective cover 25 is tightly fitted in the annular groove 22.

[0050] First, by creating an annular groove 22 on the top surface of the sealing cover 18 and fixing a magnetic ring 23 within the groove 22, the protective cover 25 is fitted into the groove 22 and adhered to the top surface of the magnetic ring 23, thus achieving a sealed protection for the bolt 21. The sealing cover 18 is connected to the annular groove 22 via a connecting cavity 27 inside the sealing cover 18. This, combined with the first notch 24 on the magnetic ring 23 and the second notch on the top surface of the sealing cover 18 located inside the protective cover 25, allows for the suction mechanism 30 to be rotated to draw air from the connecting cavity 27. This suction effectively removes air from the protective cover 25 after it is fitted, enhancing stability under negative pressure. Simultaneously, the negative pressure space reduces the contact between the bolt 21 and air. This sealing method effectively reduces the oxidation rate of the bolt 21 after outdoor installation, significantly improving its service life and ensuring good stability during subsequent disassembly and assembly. This ensures stable installation of the sealing cover 18 and good performance.

[0051] Furthermore, by utilizing the solenoid valve 32 in conjunction with the bottom hole 31 connected to the connecting groove 35, manual suction is performed during installation. The solenoid valve 32 is controlled to open and then continuously rotated for suction, reducing the air content inside the housing 1. This reduces the overall oxygen content inside the housing 1. When partial discharge occurs in electrical components, the low-oxygen environment effectively prevents internal electrical components from catching fire, greatly reducing the probability of internal combustion and improving the actual protection effect of the transformer housing. The performance is excellent.

[0052] A method for preparing a transformer casing includes the following preparation steps:

[0053] Step 1: Open heat dissipation vents 3 on the front and back sides of the formed shell 1, and weld heat dissipation frame 4 and heat dissipation frame 5 on the front and back sides of the shell 1 respectively, keeping heat dissipation frame 4 and heat dissipation frame 5 connected to heat dissipation vents 3. Insert a movable plate 12 connected to spring 13 into the inside of heat dissipation frame 4, and weld a fixing plate 11 to the other end of spring 13, so that the fixing plate 11 is fixedly welded into heat dissipation vent 3. Drill holes on the end faces of heat dissipation frame 4 and heat dissipation frame 5 respectively, and weld distribution sleeve 6 and distribution sleeve 14 on the end faces of heat dissipation frame 4 and heat dissipation frame 5 respectively, keeping distribution sleeve 6 and distribution sleeve 14 connected to heat dissipation frame 4 and heat dissipation frame 5 respectively. Weld a side tube 15 connected to the side of distribution sleeve 14, so that a threaded sealing plug 16 is installed on the inner surface of the side tube 15.

[0054] Step 2: Fix the storage cylinder 7 on the front of the housing 1, and insert the push plate 10 inside the storage cylinder 7 so that the push rod 9 on the side of the push plate 10 is connected to the storage cylinder 7. Drill a hole on the side of the storage cylinder 7 and fill it with pressurized oil, and weld the curved pipe 8 at the drilled hole so that the upper end of the curved pipe 8 is connected to the first distribution sleeve 6.

[0055] Step 3: Weld the mounting frame 17 to the top surface of the housing 1, and make a sealing groove 34 and a threaded hole 20 respectively on the top surface of the mounting frame 17. Make a sleeve hole 19 on the top surface of the sealing cover 18 of the transformer housing, so that the size of the sleeve hole 19 and the threaded hole 20 are matched. And glue an elastic sealing gasket 33 to the bottom surface of the sealing cover 18, so that the size of the sealing gasket 33 is adapted to the size and position of the sealing groove 34, and perform cover matching.

[0056] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A transformer housing, comprising a housing (1), characterized in that: Side heat dissipation plates (2) are fixedly installed on both sides of the housing (1). Heat dissipation vents (3) are opened on the front and back of the housing (1). A first heat dissipation frame (4) and a second heat dissipation frame (5) are fixedly connected to the front and back of the housing (1), respectively. The first heat dissipation frame (4) and the second heat dissipation frame (5) are connected to the heat dissipation vents (3). The end faces of the first heat dissipation frame (4) and the second heat dissipation frame (5) are fixedly connected to the first distribution sleeve (6) and the second distribution sleeve (14), respectively. A storage cylinder (7) is fixedly installed on the front of the housing (1). A curved tube (8) is fixedly connected between the storage cylinder (7) and the first distribution sleeve (6). A movable sleeve is fitted on the front of the storage cylinder (7). A push rod (9) is fixedly connected to a push plate (10) on its inner end face. The push plate (10) is movably sleeved inside the storage cylinder (7). A movable plate (12) is movably sleeved on the inner surface of the first heat dissipation frame (4). A fixed plate (11) is fixedly connected to the inner surface of the heat dissipation port (3) on one side. A spring (13) is fixedly connected between the fixed plate (11) and the movable plate (12). A side tube (15) is fixedly connected to the side of the second distribution sleeve (14). A sealing plug (16) is threaded onto the end face of the side tube (15). An installation frame (17) is fixedly installed on the top surface of the housing (1). A sealing cover (18) is provided on the top surface of the installation frame (17). The mounting frame (17) has a threaded hole (20) on its top surface and a sleeve hole (19) on its top surface. A bolt (21) is movably sleeved on the inner surface of the sleeve hole (19) and the lower end of the bolt (21) is threaded into the threaded hole (20). The top surface of the sealing cover (18) is provided with an annular groove (22), and a magnetic ring (23) is fixedly sleeved inside the annular groove (22). The annular groove (22) is located outside the sleeve hole (19). A protective cover (25) is movably sleeved on the inner surface of the annular groove (22). The protective cover (25) is located outside the bolt (21). The protective cover (25) and the magnetic ring (23) are magnetically attracted. The sealing cover (18) has a connecting cavity (27) inside, and a connecting groove (35) is provided on the top surface of the sealing cover (18). A connecting plate (28) is fixedly sleeved on the inner surface of the connecting groove (35). A through hole (29) is provided on the top surface of the connecting plate (28). The connecting groove (35) is connected to the connecting cavity (27), and the connecting cavity (27) is connected to the annular groove (22).

2. A transformer housing according to claim 1, characterized in that: The magnetic ring (23) has a first notch (24) on its top surface, and the sealing cover (18) has a second notch (26) on its top surface. The second notch (26) is located on one side of the first notch (24) and is located inside the protective cover (25).

3. A transformer housing according to claim 1, characterized in that: The bottom surface of the sealing cover (18) is provided with a bottom hole (31), which is connected to the connecting groove (35). A solenoid valve (32) is fixedly installed on the bottom surface of the sealing cover (18), and the solenoid valve (32) is movably connected to the bottom hole (31). A suction mechanism (30) is fixedly installed on the top surface of the sealing cover (18).

4. A transformer housing according to claim 1, characterized in that: The top surface of the mounting frame (17) is provided with a sealing groove (34), and the bottom surface of the sealing cover (18) is fixedly connected with a sealing gasket (33). The outer surface of the sealing gasket (33) is movably sleeved with the sealing groove (34), and the sealing groove (34) is located outside the threaded hole (20).

5. A transformer housing according to claim 3, characterized in that: The suction mechanism (30) includes a top sleeve (301), a suction plate (302), and an adjusting rod (303). The top sleeve (301) is fixedly connected to the top surface of the sealing cover (18) and located outside the through hole (29). The suction plate (302) is movably sleeved inside the top sleeve (301). The bottom surface of the adjusting rod (303) is fixedly connected to the suction plate (302), and the outer surface of the adjusting rod (303) is threadedly sleeved with the top sleeve (301).

6. A method for preparing a transformer casing according to any one of claims 1-5, characterized in that: The preparation methods include the following: Step 1: Open heat dissipation vents (3) on the front and back sides of the formed shell (1), and weld heat dissipation frame 1 (4) and heat dissipation frame 2 (5) to the front and back sides of the shell (1) respectively, keeping heat dissipation frame 1 (4) and heat dissipation frame 2 (5) connected to the heat dissipation vents (3), and insert a movable plate (12) connected to the spring (13) inside the heat dissipation frame 1 (4), and weld a fixing plate (11) to the other end of the spring (13), so that the fixing plate (11) is fixedly welded in the heat dissipation vent (3). Drill holes on the end faces of the first heat sink (4) and the second heat sink (5), and weld the first distribution sleeve (6) and the second distribution sleeve (14) on the end faces of the first heat sink (4) and the second heat sink (5) respectively, keeping the first distribution sleeve (6) and the second distribution sleeve (14) connected to the first heat sink (4) and the second heat sink (5) respectively, and weld the side tube (15) connected to the side of the second distribution sleeve (14), so that the inner surface of the side tube (15) is fitted with a threaded sealing plug (16). Step 2: Fix the storage cylinder (7) on the front of the housing (1), and insert the push plate (10) inside the storage cylinder (7) so that the push rod (9) on the side of the push plate (10) is connected to the storage cylinder (7). Drill a hole on the side of the storage cylinder (7) and fill it with pressurized oil, and weld the curved pipe (8) connected at the drilled hole so that the upper end of the curved pipe (8) is connected to the first distribution sleeve (6). Step 3: Weld the mounting frame (17) on the top surface of the housing (1), and make the top surface of the mounting frame (17) open the sealing groove (34) and the threaded hole (20) respectively. Make the top surface of the sealing cover (18) of the transformer housing open the sleeve hole (19) so that the size of the sleeve hole (19) and the threaded hole (20) are matched. And glue the elastic sealing gasket (33) on the bottom surface of the sealing cover (18) so that the size of the sealing gasket (33) is adapted to the size and position of the sealing groove (34) for cover matching.

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