A lifting seat structure for a transformer bushing, a transformer and a method for disassembling and assembling the same

Abstract

The application discloses a lifting seat structure for a transformer bushing, a transformer and a dismounting method thereof, relates to the technical field of transformers, and comprises a steel sleeve and a pipe joint assembly. The steel sleeve comprises a first connecting cylinder and a second connecting cylinder, the first connecting cylinder and the second connecting cylinder are detachably connected to form a connecting cavity, and a wiring hand hole communicating with the connecting cavity is arranged on the steel sleeve. The pipe joint assembly comprises a first pipe joint and a second pipe joint, the first pipe joint is detachably connected with one end of the steel sleeve, the first pipe joint is connected with the transformer side, the second pipe joint is detachably connected with the other end of the steel sleeve, and the second pipe joint is connected with the outgoing line side of the bushing. The application realizes step-by-step installation and removal of the lifting seat structure by matching the split steel sleeve with the detachable pipe joint assembly, the lifting seat structure of the transformer bushing can be conveniently dismounted without hoisting equipment and by manual operation, the convenience of dismounting the transformer bushing is improved, and the requirement of maintainability of the transformer equipment is met.

Description

Technical Field

[0001] This application relates to the field of transformer technology, and more specifically, to a riser structure for transformer bushings, a transformer, and a method for disassembling and assembling the same. Background Technology

[0002] The transformer bushing riser is an important component inside the transformer. It connects the transformer tank and the external high-voltage leads, providing support and insulation for the leads and improving the electric field distribution inside the transformer.

[0003] Traditional transformer bushing riser mounts typically use a rigid connection, which makes it inconvenient to disassemble and assemble the riser mounts in confined spaces during later maintenance, and cannot meet the current engineering requirements for the maintainability of transformer equipment.

[0004] Therefore, how to improve the ease of disassembly and assembly of transformer bushing riser seats and meet the maintainability requirements of transformer equipment has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the purpose of this application is to provide a riser structure for transformer bushings to improve the ease of disassembly and assembly of transformer bushing risers and meet the maintainability requirements of transformer equipment.

[0006] Another object of this application is to provide a transformer having the above-described riser structure for transformer bushings.

[0007] Another objective of this application is to provide a method for disassembling and assembling a riser structure for a transformer bushing as described above.

[0008] To achieve the above objectives, this application provides the following technical solution:

[0009] A riser structure for transformer bushings, comprising:

[0010] A steel sleeve, comprising a first connecting sleeve and a second connecting sleeve, wherein the first connecting sleeve and the second connecting sleeve are detachably connected to form a connecting cavity for installing a sleeve, and the steel sleeve is provided with a hand hole communicating with the connecting cavity;

[0011] A pipe fitting assembly, comprising a first pipe fitting and a second pipe fitting, wherein the first pipe fitting is detachably connected to one end of the steel sleeve and is used to connect to the transformer side, and the second pipe fitting is detachably connected to the other end of the steel sleeve and is used to connect to the outlet side of the bushing.

[0012] Optionally, in the above-described riser structure for transformer bushings, the first pipe joint includes a first flange and a first pipe sleeve. The first flange is connected to one end of the first pipe sleeve, and the other end of the first pipe sleeve is inserted into the connecting cavity and connected to the side wall of the connecting cavity through a first fastener.

[0013] Optionally, in the above-described riser structure for transformer bushings, a first positioning member and a second positioning member are provided between the outer wall of the first pipe fitting and the inner wall of the connecting cavity for positioning the first sealing member. The first sealing member is located between the first positioning member and the second positioning member, so that the first positioning member and the second positioning member limit the first sealing member along the axial direction of the first pipe fitting.

[0014] Optionally, in the above-described riser structure for transformer bushings, a first dustproof component is further provided between the outer wall of the first pipe sleeve and the inner wall of the connecting cavity. The first dustproof component is used to prevent dust from entering the connecting cavity.

[0015] Optionally, in the above-described riser structure for transformer bushings, the second pipe joint includes a second flange and a second pipe sleeve. The second flange is connected to one end of the second pipe sleeve, and the other end of the second pipe sleeve is inserted into the connecting cavity and connected to the side wall of the connecting cavity through a second fastener.

[0016] Optionally, in the above-described riser structure for transformer bushings, a third positioning member and a fourth positioning member for positioning the second sealing member are provided between the outer wall of the second pipe sleeve and the inner wall of the connecting cavity. The second sealing member is located between the third positioning member and the fourth positioning member, so that the third positioning member and the fourth positioning member limit the second sealing member along the axial direction of the second pipe sleeve.

[0017] Optionally, in the above-described riser structure for transformer bushings, a second dustproof component is further provided between the outer wall of the second pipe sleeve and the inner wall of the connecting cavity. The second dustproof component is used to prevent dust from entering the connecting cavity.

[0018] Optionally, in the above-described riser structure for transformer bushings, the first connecting cylinder includes a first connecting cylinder wall and a first connecting flange located on the first connecting cylinder wall and arranged axially along the first connecting cylinder wall; the second connecting cylinder includes a second connecting cylinder wall and a second connecting flange located on the second connecting cylinder wall and arranged axially along the second connecting cylinder wall; the first connecting flange and the second connecting flange are connected by a third fastener, so that the first connecting cylinder wall and the second connecting cylinder wall enclose the connecting cavity.

[0019] Optionally, in the above-described riser structure for transformer bushings, at least one of the first connecting flange and the second connecting flange is provided with a sealing groove for installing a third seal.

[0020] A transformer includes a riser structure for a transformer bushing as described in any of the preceding claims.

[0021] A method for disassembling and assembling a riser structure, for a riser structure for a transformer bushing as described in any of the preceding claims, characterized in that it includes:

[0022] Step A: Connect the pipe fitting assembly, connect and fix the first pipe fitting to the transformer, and connect the second pipe fitting to the outlet side of the bushing;

[0023] Step B: Install the first connecting cylinder and seal the first connecting cylinder to the first pipe joint and the second pipe joint. The height of the first connecting cylinder is less than the height of the second connecting cylinder.

[0024] Step C: Install the second connecting cylinder, and seal the second connecting cylinder to the first pipe joint and the second pipe joint respectively, and seal the second connecting cylinder to the first connecting cylinder to form the connecting cavity;

[0025] Step D, sleeve wiring: insert the sleeve into the connection cavity through the wiring hand hole to perform sleeve wiring.

[0026] Optionally, the above-described method for disassembling and assembling the riser structure further includes the step of disassembling the riser structure; the disassembly of the riser structure specifically includes:

[0027] Step E1: Remove the second connecting cylinder from above;

[0028] Step E2: Remove the first connecting cylinder from below;

[0029] Step E3: Remove the pipe joint assembly, disconnect the first pipe joint from the transformer, and disconnect the second pipe joint from the outlet side of the bushing.

[0030] The riser structure for transformer bushings provided in this application is fixed to the transformer side via a first pipe joint and to the outlet side of the bushing via a second pipe joint. The first and second connecting sleeves of the steel sleeve are sequentially connected to the pipe joint assembly, forming a connecting cavity for installing the bushing. Wiring is performed inside the connecting cavity through a hand hole. During maintenance, the second and first connecting sleeves of the steel sleeve can be removed sequentially, followed by the removal of the first and second pipe joints, thus completing the dismantling of the riser structure. As can be seen from the above example, the riser structure for transformer bushings provided in this application, through the combination of a split steel sleeve and a detachable pipe joint assembly, enables step-by-step installation and dismantling of the riser structure, overcoming the spatial limitations of traditional integral structures. It can be used in conditions such as transformer-side fixing and narrow installation channels. Furthermore, the dismantling and assembly process does not require hoisting equipment and can be completed manually, improving the convenience of transformer bushing riser assembly and dismantling and meeting the maintainability requirements of transformer equipment.

[0031] The technical features mentioned above, those to be mentioned below, and those shown individually in the accompanying drawings can be combined arbitrarily, provided that the combined technical features are not contradictory. All feasible combinations of features are the technical content explicitly described herein. Any one of the multiple sub-features contained in the same statement can be applied independently, without necessarily being applied together with other sub-features. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the lifting seat structure provided in the embodiments of this application;

[0034] Figure 2 Provided for the embodiments of this application Figure 1 Sectional view of AA in the middle;

[0035] Figure 3 This is a schematic diagram of the connection of the first pipe fitting provided in an embodiment of this application;

[0036] Figure 4 This is a schematic diagram of the connection of the second pipe fitting provided in an embodiment of this application;

[0037] Figure 5This is a schematic diagram of the structure of the second connecting cylinder provided in an embodiment of this application;

[0038] Figure 6 A partial schematic diagram of the connection between the first connecting cylinder and the second connecting cylinder provided in an embodiment of this application;

[0039] Figure 7 The process of disassembling and assembling the lifting seat structure provided in the embodiments of this application Figure 1 ;

[0040] Figure 8 The process of disassembling and assembling the lifting seat structure provided in the embodiments of this application Figure 2 .

[0041] Among them, 100 is the lifting seat structure, 10 is the steel sleeve, and 20 is the pipe fitting assembly;

[0042] 11 is the first connecting cylinder, 111 is the first connecting cylinder wall, 112 is the first connecting flange, 12 is the second connecting cylinder, 121 is the second connecting cylinder wall, 122 is the second connecting flange, 13 is the connecting cavity, 14 is the wiring hand hole, 15 is the third fastener, 16 is the sealing groove, and 17 is the third sealing element.

[0043] 21 is the first pipe fitting, 211 is the first flange, 212 is the first pipe sleeve, 213 is the first seal, 214 is the first positioning element, 215 is the second positioning element, 216 is the first dustproof element, 217 is the first fastener, 218 is the first threaded seat, 22 is the second pipe fitting, 221 is the second flange, 222 is the second pipe sleeve, 223 is the second seal, 224 is the third positioning element, 225 is the fourth positioning element, 226 is the second dustproof element, 227 is the second fastener, and 228 is the second threaded seat;

[0044] 200 is for the sleeve. Detailed Implementation

[0045] The core of this application is to provide a riser structure for transformer bushings to improve the ease of installation and removal of the riser and meet the maintainability requirements of transformer equipment.

[0046] Another core aspect of this application is to provide a transformer having the aforementioned riser structure for transformer bushings.

[0047] Another core aspect of this application is to provide a method for disassembling and assembling the aforementioned riser structure for transformer bushings.

[0048] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0049] The installation of large power transformers generally employs two foundation fixing methods: one is welding the bottom of the tank to the foundation's embedded parts, and the other is mechanically connecting the bottom of the tank to the foundation's embedded parts using anchor bolts. Welding is widely used due to its ease of construction and reliable connection. However, this permanent fixing method prevents the transformer from being moved during maintenance, necessitating on-site disassembly and reassembly, significantly increasing maintenance difficulty and operational risks. Furthermore, transformer layout must meet safety distance requirements from firewalls. With the increasing use of special applications such as nuclear power, the transformer bushing outlet side is often permanently enclosed by concrete structures. While this compact layout saves space, it severely restricts equipment maintainability and causes significant inconvenience for later maintenance.

[0050] The transformer bushing riser is an important component inside the transformer. It connects the transformer tank and the external high-voltage leads, providing support and insulation for the leads and improving the electric field distribution inside the transformer.

[0051] Traditional transformer bushing riser mounts typically employ a rigid connection method, where the bushing and flanges at both ends are welded together, and then the flanges at both ends of the bushing are connected to the transformer and the bushing's outgoing line side, respectively. This connection method makes disassembly and assembly of the transformer bushing riser mount in confined spaces during later maintenance inconvenient and fails to meet the current engineering requirements for transformer equipment maintainability.

[0052] Therefore, such as Figure 1 As shown in the figure, this application discloses a riser structure for transformer bushings, including a steel sleeve 10 and a pipe joint assembly 20. By using a split steel sleeve 10 and a detachable pipe joint assembly 20, the riser structure 100 can be installed and dismantled in stages, overcoming the spatial limitations of traditional integral structures. It can be used in conditions such as transformer-side fixing and narrow installation channels. Furthermore, the dismantling and assembly process requires no hoisting equipment and can be completed manually, improving the convenience of installing and dismantling the transformer bushing 200 riser and meeting the maintainability requirements of transformer equipment.

[0053] The following will combine Figures 1 to 6 The lifting seat structure for transformer bushings disclosed in the embodiments of this application will be explained and described in detail.

[0054] like Figure 1 As shown, the steel sleeve 10 may include a first connecting sleeve 11 and a second connecting sleeve 12, and the first connecting sleeve 11 and the second connecting sleeve 12 may be detachably and sealedly connected by fasteners such as bolts to form a connecting cavity 13 for mounting sleeve 200. At the same time, the steel sleeve 10 is provided with a wiring hand hole 14 communicating with the connecting cavity 13, so that the operator can easily insert into the connecting cavity 13 through the wiring hand hole 14 to perform sleeve wiring.

[0055] For example, the cross-section of the steel sleeve 10 can be rectangular, so that two, three or more sleeves 200 can be placed in the connecting cavity 13 in scenarios such as nuclear power plants. The first connecting sleeve 11 and the second connecting sleeve 12 can both be made of Q355B steel with a wall thickness of not less than 8mm. At the same time, the first connecting sleeve 11 and the second connecting sleeve 12 are hot-dip galvanized, and the zinc layer thickness is not less than 85μm, so that the steel sleeve 10 can adapt to an ambient temperature of -40℃ to 120℃.

[0056] like Figure 1 As shown, the pipe fitting assembly 20 may include a first pipe fitting 21 and a second pipe fitting 22. The first pipe fitting 21 is detachably and sealingly connected to one end of the steel sleeve 10 by fasteners such as bolts, so that the first pipe fitting 21 can be connected to the transformer side. The second pipe fitting 22 is detachably and sealingly connected to the other end of the steel sleeve 10 by fasteners such as bolts, so that the second pipe fitting 22 can be connected to the outlet side of the bushing 200.

[0057] For example, the first pipe joint 21 and the second pipe joint 22 can both be made of Q355B steel with a wall thickness of not less than 8mm. At the same time, the first pipe joint 21 and the second pipe joint 22 are hot-dip galvanized and the zinc layer thickness is not less than 85μm, so that the pipe joint assembly 20 can adapt to an ambient temperature of -40℃ to 120℃.

[0058] like Figure 2 As shown, in order to facilitate the installation of the steel sleeve 10, the height of the first connecting sleeve 11 is less than the height of the second connecting sleeve 12, so that when the steel sleeve 10 is installed, the first connecting sleeve 11 located below can better extend into the narrow space between the sleeve 200 and the ground. At the same time, the force of the first connecting sleeve 11 is smaller, which can reduce the stress between the first connecting sleeve 11 and the pipe joint assembly 20 and ensure the reliability of the connection of bolts and other fasteners.

[0059] When installing the riser structure 100, the first pipe joint 21 is connected and fixed to the transformer side by bolts and other fasteners, and the second pipe joint 22 is connected and fixed to the outlet side of the bushing 200 by bolts and other fasteners. Then, the first connecting cylinder 11 is connected to the first pipe joint 21 and the second pipe joint 22 in sequence, and the second connecting cylinder 12 is connected to the first pipe joint 21 and the second pipe joint 22 in sequence. At the same time, the first connecting cylinder 11 and the second connecting cylinder 12 are connected together, thereby realizing the installation of the riser structure 100.

[0060] When it is necessary to dismantle the riser structure 100 for transformer maintenance, the second connecting sleeve 12 and the first connecting sleeve 11 of the steel sleeve 10 can be dismantled in sequence, and then the first pipe joint 21 and the second pipe joint 22 can be dismantled respectively to complete the dismantling of the riser structure 100.

[0061] The riser structure 100 for transformer bushings disclosed in this application is constructed by connecting and fixing a first pipe joint 21 to the transformer side with bolts or other fasteners, and a second pipe joint 22 to the outlet side of the bushing 200 with bolts or other fasteners. Then, a first connecting sleeve 11 is sequentially connected to the first pipe joint 21 and the second pipe joint 22, and a second connecting sleeve 12 is connected to both the first and second pipe joints 21 and 22, thus connecting the first and second connecting sleeves together. When maintenance requires disassembling the riser structure 100, the second connecting sleeve 12 and the first connecting sleeve 11 of the steel sleeve 10 can be removed sequentially, followed by the removal of the first pipe joint 21 and the second pipe joint 22, thereby completing the disassembly of the riser structure 100.

[0062] The riser structure 100 for transformer bushing 200 disclosed in this application embodiment uses a split steel sleeve 10 and a detachable pipe joint assembly 20 to achieve step-by-step installation and disassembly of the riser structure 100. This breaks through the space limitations of traditional integral structures and can be used in working conditions such as transformer side fixing and narrow installation channels. At the same time, the disassembly and assembly process does not require hoisting equipment and can be completed manually, which can improve the installation efficiency by more than 40%. This improves the convenience of disassembling and assembling the riser of transformer bushing 200 and meets the maintainability requirements of transformer equipment.

[0063] like Figure 3 As shown, the first pipe connector 21 may include a first flange 211 and a first pipe sleeve 212, and the first flange 211 is connected to one end of the first pipe sleeve 212, and the other end of the first pipe sleeve 212 is inserted into the connecting cavity 13 and connected to the side wall of the connecting cavity 13 by bolts or other first fasteners 217.

[0064] For example, the first pipe connector 212 can be rectangular with the same cross-sectional shape as the connecting cavity 13, and the projected area of ​​the first pipe connector 212 is smaller than the projected area of ​​the connecting cavity 13 to ensure that the first pipe connector 212 can be inserted into the connecting cavity 13. For ease of understanding, the two oppositely arranged ends of the first pipe connector 212 are defined as the first end and the second end, respectively. The first flange 211 can be welded to the first end of the first pipe connector 212 for connection and fixation to the transformer side by bolts or other fasteners. Figure 3 As shown, the second end of the first pipe connector 212 can be inserted into the connecting cavity 13. A first mounting hole is provided on the side wall of the connecting cavity 13, and a first threaded seat 218 adapted to the first mounting hole is welded to the second end of the first pipe connector 212. This allows the first fastener 217 to pass through the first mounting hole and be threadedly connected to the first threaded seat 218, thereby fixing the first pipe joint 21 onto the steel sleeve 10. It should be noted that, to ensure the reliability of the first pipe joint 21 connection, multiple first mounting holes can be used, and each first mounting hole can be evenly distributed along the circumference of the connecting cavity 13 on the side wall. Simultaneously, the first threaded seat 218 of the first pipe connector 212 is correspondingly provided with the first mounting hole, so that the first pipe joint 21 can be connected through multiple first fasteners 217, thereby ensuring the reliability of the first pipe joint 21 connection.

[0065] To ensure a sealed connection between the first pipe joint 21 and the steel sleeve 10, such as Figure 3 As shown, a first sealing element 213 is installed between the outer wall of the first pipe fitting 212 and the inner wall of the connecting cavity 13 to achieve a sealed connection between the first pipe fitting 21 and the steel sleeve 10.

[0066] For example, the first seal 213 may be a gasket made of nitrile rubber, acrylate or fluororubber according to actual needs, and the compression height of the gasket is about 30% of the diameter of the gasket, while the life cycle of the first seal 213 is not less than 15 years.

[0067] To achieve the installation and positioning of the first seal 213, such as Figure 3 As shown, a first positioning member 214 and a second positioning member 215 are provided between the outer wall of the first pipe sleeve 212 and the inner wall of the connecting cavity 13 to position the first sealing member 213, and the first sealing member 213 is located between the first positioning member 214 and the second positioning member 215, so that the first positioning member 214 and the second positioning member 215 limit the first sealing member 213 along the axial direction of the first pipe sleeve 212.

[0068] For example, such as Figure 3As shown, the first positioning member 214 and the second positioning member 215 can be welded to the outer wall of the first pipe connector 212 along the circumference of the first pipe connector 212, and a first groove for installing the first sealing member 213 is formed between the first positioning member 214 and the second positioning member 215, so that the first sealing member 213 can be installed in the first groove, thereby realizing the axial positioning of the first sealing member 213 along the first pipe connector 212 by the first positioning member 214 and the second positioning member 215, and the radial positioning of the first sealing member 213 by the outer wall of the first pipe connector 212 and the inner wall of the connecting cavity 13, so as to realize the installation and positioning of the first sealing member 213. Among them, the first positioning member 214 can be made of 12mm square steel to fix the first sealing member 213, and the second positioning member 215 can be made of 16mm square steel to distribute mechanical stress. Of course, the materials of the first positioning member 214 and the second positioning member 215 can also be configured according to the actual situation, which is not limited here.

[0069] To prevent dust from entering the connecting cavity 13 from between the outer wall of the first pipe connector 212 and the inner wall of the connecting cavity 13, such as Figure 3 As shown, a first dustproof component 216 is also provided between the outer wall of the first pipe sleeve 212 and the inner wall of the connecting cavity 13.

[0070] For example, the first dustproof component 216 can be made of 16mm square steel, and the first dustproof component 216 can be welded circumferentially to a position near the end of the steel sleeve 10 along the first pipe connector 212, so as to prevent dust from entering the connecting cavity 13 from between the outer wall of the first pipe connector 212 and the inner wall of the connecting cavity 13, and at the same time prevent water stains from entering the connecting cavity 13 and corroding the sleeve 200. The material of the first dustproof component 216 can also be configured according to the actual situation, which is not limited here.

[0071] To ensure the reliability of the connection of the first pipe joint 21, the first mounting hole can be set in the central area between the first dustproof part 216 and the second positioning part 215, thereby forming a symmetrical force-bearing structure, making the load distribution more uniform, increasing the structural strength by 30%, and ensuring the reliability of the connection between the first pipe joint 21 and the steel sleeve 10.

[0072] like Figure 4 As shown, the second pipe connector 22 may include a second flange 221 and a second pipe sleeve 222, with the second flange 221 connected to one end of the second pipe sleeve 222, and the other end of the second pipe sleeve 222 inserted into the connecting cavity 13 and connected to the side wall of the connecting cavity 13 by bolts or other second fasteners 227.

[0073] For example, the second pipe connector 222 can be rectangular with the same cross-sectional shape as the connecting cavity 13, and the projected area of ​​the second pipe connector 222 is smaller than the projected area of ​​the connecting cavity 13, so as to ensure that the second pipe connector 222 can be inserted into the connecting cavity 13. For ease of understanding, the two oppositely arranged ends of the second pipe connector 222 are defined as the first end and the second end, respectively. The second flange 221 can be welded to the first end of the second pipe connector 222 so as to be connected and fixed to the outlet side of the sleeve 200 by bolts or other fasteners. Figure 4 As shown, the second end of the second pipe connector 222 can be inserted into the connecting cavity 13. A second mounting hole is provided on the side wall of the connecting cavity 13, and a second threaded seat 228 adapted to the second mounting hole is welded to the second end of the second pipe connector 222. This allows the second fastener 227 to pass through the second mounting hole and be threadedly connected to the second threaded seat 228, thereby fixing the second pipe connector 22 onto the steel sleeve 10. It should be noted that, to ensure the reliability of the second pipe connector 22 connection, multiple second mounting holes can be used, and each second mounting hole can be evenly distributed along the circumference of the connecting cavity 13 on the side wall. Simultaneously, the second threaded seat 228 of the second pipe connector 222 is correspondingly provided with the second mounting hole, so that the second pipe connector 22 can be connected through multiple second fasteners 227, thereby ensuring the reliability of the second pipe connector 22 connection.

[0074] To ensure a sealed connection between the second pipe joint 22 and the steel sleeve 10, such as Figure 4 As shown, a second sealing element 223 is installed between the outer wall of the second pipe fitting 222 and the inner wall of the connecting cavity 13 to achieve a sealed connection between the second pipe fitting 22 and the steel sleeve 10.

[0075] For example, the second seal 223 may be a gasket made of nitrile rubber, acrylate or fluororubber as required, and the compression height of the gasket is about 30% of the diameter of the gasket, while the life cycle of the second seal 223 is not less than 15 years.

[0076] To achieve the installation and positioning of the second seal 223, such as Figure 4 As shown, a third positioning member 224 and a fourth positioning member 225 are provided between the outer wall of the second pipe sleeve 222 and the inner wall of the connecting cavity 13 to position the second sealing member 223, and the second sealing member 223 is located between the third positioning member 224 and the fourth positioning member 225 so that the third positioning member 224 and the fourth positioning member 225 limit the second sealing member 223 along the axial direction of the second pipe sleeve 222.

[0077] For example, such as Figure 4As shown, the third positioning member 224 and the fourth positioning member 225 can be welded to the outer wall of the second pipe connector 222 along the circumference of the second pipe connector 222, and a second groove for installing the second seal 223 is formed between the third positioning member 224 and the fourth positioning member 225, so that the second seal 223 can be installed in the second groove. This achieves axial positioning of the second seal 223 along the second pipe connector 222 by the third positioning member 224 and the fourth positioning member 225, and radial positioning of the second seal 223 by the outer wall of the second pipe connector 222 and the inner wall of the connecting cavity 13, thereby achieving the installation and positioning of the second seal 223. The third positioning member 224 can be made of 12mm square steel to fix the second seal 223, and the fourth positioning member 225 can be made of 16mm square steel to distribute mechanical stress. Of course, the materials of the third positioning member 224 and the fourth positioning member 225 can also be configured according to the actual situation, which is not limited here.

[0078] To prevent dust from entering the connecting cavity 13 from between the outer wall of the second pipe connector 222 and the inner wall of the connecting cavity 13, such as Figure 4 As shown, a second dustproof component 226 is also provided between the outer wall of the second pipe sleeve 222 and the inner wall of the connecting cavity 13.

[0079] For example, the second dustproof component 226 can be made of 16mm square steel, and can be welded circumferentially to the position near the end of the steel sleeve 10 along the second pipe connector 222 to prevent dust from entering the connecting cavity 13 from between the outer wall of the second pipe connector 222 and the inner wall of the connecting cavity 13, and at the same time prevent water stains from entering the connecting cavity 13 and corroding the sleeve 200. The material of the second dustproof component 226 can also be configured according to the actual situation, and is not limited here.

[0080] To ensure the reliability of the second pipe joint 22 connection, the second mounting hole can be set in the central area between the second dustproof component 226 and the fourth positioning component 225, thereby forming a symmetrical force-bearing structure, making the load distribution more uniform, increasing the structural strength by 30%, and ensuring the reliability of the connection between the second pipe joint 22 and the steel sleeve 10.

[0081] like Figure 2As shown, the first connecting cylinder 11 may include a first connecting cylinder wall 111 and a first connecting flange 112 located on the first connecting cylinder wall 111 and arranged axially along the first connecting cylinder wall 111. The second connecting cylinder 12 may include a second connecting cylinder wall 121 and a second connecting flange 122 located on the second connecting cylinder wall 121 and arranged axially along the second connecting cylinder wall 121. A wiring manhole 14 may be located on the second connecting cylinder wall 121, and the first connecting flange 112 and the second connecting flange 122 may be connected by a third fastener 15 such as bolts, so that the first connecting cylinder wall 111 and the second connecting cylinder wall 121 enclose a connecting cavity 13.

[0082] For example, the first connecting flange 112 and the first connecting cylinder wall 111 can be of a separate structure, and the first connecting flange 112 can be welded to the first connecting cylinder wall 111, or the first connecting flange 112 and the first connecting cylinder wall 111 can be of an integral structure. Similarly, the second connecting flange 122 and the second connecting cylinder wall 121 can be of a separate structure, and the second connecting flange 122 can be welded to the second connecting cylinder wall 121, or the second connecting flange 122 and the second connecting cylinder wall 121 can be of an integral structure; this is not limited herein.

[0083] To achieve a sealed connection between the first connecting cylinder 11 and the second connecting cylinder 12, such as Figure 1 and Figure 6 As shown, a third sealing element 17 is installed between the first connecting flange 112 and the second connecting flange 122 to achieve a sealed connection between the first connecting cylinder 11 and the second connecting cylinder 12.

[0084] For example, the third seal 17 may be a gasket made of nitrile rubber, acrylate or fluororubber as required, and the compression height of the gasket is about 30% of the diameter of the gasket, while the life cycle of the third seal 17 is not less than 15 years.

[0085] To achieve the installation and positioning of the third seal 17, such as Figure 6 As shown, at least one of the first connecting flange 112 and the second connecting flange 122 is provided with a sealing groove 16 so that the third sealing element 17 can be installed in the sealing groove 16. The sealing groove 16 can be provided on either the first connecting flange 112 or the second connecting flange 122, or it can be provided on both the first connecting flange 112 and the second connecting flange 122, thereby achieving the installation and positioning of the third sealing element 17.

[0086] For example, such as Figure 6As shown, the sealing groove 16 is arranged on the first connecting flange 112 along the axial direction of the first connecting cylinder wall 111, and the depth of the sealing groove 16 can be 7.9mm to 8.1mm, and the width of the sealing groove 16 can be 11.8mm to 12.0mm, so that the third sealing element 17 can be installed in the sealing groove 16, thereby realizing the sealing connection between the first connecting cylinder 11 and the second connecting cylinder 12.

[0087] This application also discloses a transformer, including the riser structure 100 for transformer bushings disclosed in the above embodiments. Therefore, the transformer has all the technical effects of the riser structure 100 for transformer bushings, which will not be repeated here.

[0088] like Figure 7 and Figure 8 As shown in the embodiments, this application also discloses a method for assembling and disassembling a riser seat structure. Regarding the riser seat structure 100 for transformer bushings disclosed in the above embodiments, this riser seat structure 100 possesses all the technical effects of the aforementioned riser seat structure 100 for transformer bushings, which will not be repeated here. Wherein, as... Figure 7 As shown, the assembly and disassembly method of the riser structure includes step S100 connecting the pipe connector assembly, step S101 installing the first connecting cylinder, step S102 installing the second connecting cylinder, and step S103 connecting the sleeve.

[0089] Step S100: Connect the pipe fitting assembly;

[0090] The first pipe connector 21 is connected and fixed to the transformer, and the second pipe connector 22 is connected to the outlet side of the bushing 200. Specifically, the first flange 211 of the first pipe connector 21 is connected and fixed to the transformer with bolts or other fasteners, and the second flange 221 of the second pipe connector 22 is connected and fixed to the outlet side of the bushing 200 with bolts or other fasteners.

[0091] Step S101: Install the first connecting cylinder;

[0092] The first connecting cylinder 11 is sealed and connected to the first pipe connector 21 and the second pipe connector 22. Specifically, the first connecting cylinder 11 is located at the bottom, that is, on the side closer to the ground, and one end of the first connecting cylinder 11 is sealed and fixed to the first pipe connector 212 of the first pipe connector 21 by the first fastener 217, while the other end of the first connecting cylinder 11 is sealed and fixed to the second pipe connector 222 of the second pipe connector 22 by the second fastener 227.

[0093] Step S102: Install the second connecting cylinder;

[0094] The second connecting sleeve 12 is sealed and connected to the first pipe joint 21 and the second pipe joint 22 respectively, and the second connecting sleeve 12 is also sealed and connected to the first connecting sleeve 11 to form a connecting cavity 13. Specifically, the second connecting sleeve 12 is fastened to the top of the first connecting sleeve 11, and one end of the second connecting sleeve 12 is sealed and fixed to the first pipe joint 212 of the first pipe joint 21 by a first fastener 217, and the other end of the second connecting sleeve 12 is sealed and fixed to the second pipe joint 222 of the second pipe joint 22 by a second fastener 227. At the same time, the second connecting flange 122 of the second connecting sleeve 12 is sealed and connected to the first connecting flange 112 of the first connecting sleeve 11.

[0095] Step S103, bushing connection;

[0096] The operator inserts the wiring hand hole 14 into the connecting cavity 13 to connect the sleeve 200, thereby completing the installation of the riser structure.

[0097] like Figure 8 As shown, when it is necessary to dismantle the riser structure, the dismantling method further includes the step of dismantling the riser structure. Specifically, the dismantling of the riser structure includes step S200 of dismantling the second connecting cylinder, step S201 of dismantling the first connecting cylinder, and step S202 of dismantling the pipe joint assembly. Specifically, in step S200 of dismantling the second connecting cylinder, the second connecting cylinder 12 is dismantled from above; in step S201 of dismantling the first connecting cylinder, the first connecting cylinder 11 is dismantled from below; in step S202 of dismantling the pipe joint assembly, the first pipe joint 21 is disconnected from the transformer, and the second pipe joint 22 is disconnected from the outlet side of the bushing 200, thereby dismantling the riser structure to facilitate transformer maintenance.

[0098] The terms "first" and "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units may include steps or units not listed, but rather not listed.

[0099] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for disassembling and assembling a lifting seat structure, characterized in that, include: Step A: Connect the pipe fitting assembly. The pipe fitting assembly (20) includes a first pipe fitting (21) and a second pipe fitting (22). The first pipe fitting (21) is connected and fixed to the transformer, and the second pipe fitting (22) is connected to the outgoing side of the bushing (200). Step B, install the first connecting sleeve. The steel sleeve (10) includes a first connecting sleeve (11) and a second connecting sleeve (12) that can be detachably connected to the first connecting sleeve (11). The first connecting sleeve (11) of the steel sleeve (10) is sealed to the first pipe joint (21) and the second pipe joint (22) respectively, and the height of the first connecting sleeve (11) is less than the height of the second connecting sleeve (12) of the steel sleeve (10). Step C, install the second connecting cylinder, seal the second connecting cylinder (12) to the first pipe joint (21) and the second pipe joint (22) respectively, and seal the second connecting cylinder (12) to the first connecting cylinder (11) to form a connecting cavity (13) for installing the sleeve (200). Step D, sleeve wiring: The steel sleeve (10) is provided with a wiring hand hole (14) that communicates with the connecting cavity (13). The sleeve wiring is performed by extending into the connecting cavity (13) through the wiring hand hole (14) on the steel sleeve (10).

2. The method for disassembling and assembling the riser structure according to claim 1, characterized in that, Also includes: Step E1: Remove the second connecting cylinder (12) from above; Step E2, remove the first connecting cylinder, remove the first connecting cylinder (11) from below; Step E3: Remove the pipe joint assembly, disconnect the first pipe joint (21) from the transformer, and disconnect the second pipe joint (22) from the outlet side of the bushing (200).

3. The method for disassembling and assembling the riser structure according to claim 1, characterized in that, The first pipe fitting (21) includes a first flange (211) and a first pipe sleeve (212). The first flange (211) is connected to one end of the first pipe sleeve (212), and the other end of the first pipe sleeve (212) is inserted into the connecting cavity (13) and connected to the side wall of the connecting cavity (13) through a first fastener (217).

4. The method for disassembling and assembling the riser structure according to claim 3, characterized in that, A first positioning element (214) and a second positioning element (215) for positioning the first sealing element (213) are provided between the outer wall of the first pipe sleeve (212) and the inner wall of the connecting cavity (13). The first sealing element (213) is located between the first positioning element (214) and the second positioning element (215) so that the first positioning element (214) and the second positioning element (215) limit the first sealing element (213) along the axial direction of the first pipe sleeve (212).

5. The method for disassembling and assembling the riser structure according to claim 4, characterized in that, A first dustproof component (216) is provided between the outer wall of the first pipe sleeve (212) and the inner wall of the connecting cavity (13). The first dustproof component (216) is used to prevent dust from entering the connecting cavity (13).

6. The method for disassembling and assembling the riser structure according to claim 1, characterized in that, The second pipe fitting (22) includes a second flange (221) and a second pipe sleeve (222). The second flange (221) is connected to one end of the second pipe sleeve (222), and the other end of the second pipe sleeve (222) is inserted into the connecting cavity (13) and connected to the side wall of the connecting cavity (13) through a second fastener (227).

7. The method for disassembling and assembling the riser structure according to claim 6, characterized in that, A third positioning element (224) and a fourth positioning element (225) for positioning the second sealing element (223) are provided between the outer wall of the second pipe sleeve (222) and the inner wall of the connecting cavity (13). The second sealing element (223) is located between the third positioning element (224) and the fourth positioning element (225) so that the third positioning element (224) and the fourth positioning element (225) limit the second sealing element (223) along the axial direction of the second pipe sleeve (222).

8. The method for disassembling and assembling the riser structure according to claim 7, characterized in that, A second dustproof component (226) is provided between the outer wall of the second pipe sleeve (222) and the inner wall of the connecting cavity (13). The second dustproof component (226) is used to prevent dust from entering the connecting cavity (13).

9. The method for disassembling and assembling the riser structure according to claim 1, characterized in that, The first connecting cylinder (11) includes a first connecting cylinder wall (111) and a first connecting flange (112) located on the first connecting cylinder wall (111) and arranged axially along the first connecting cylinder wall (111). The second connecting cylinder (12) includes a second connecting cylinder wall (121) and a second connecting flange (122) located on the second connecting cylinder wall (121) and arranged axially along the second connecting cylinder wall (121). The first connecting flange (112) and the second connecting flange (122) are connected by a third fastener (15) so that the first connecting cylinder wall (111) and the second connecting cylinder wall (121) surround and form the connecting cavity (13).

10. The method for disassembling and assembling the riser structure according to claim 9, characterized in that, At least one of the first connecting flange (112) and the second connecting flange (122) is provided with a sealing groove (16) for installing the third seal (17).

11. A transformer, characterized in that, The method for disassembling and assembling the lifting seat structure as described in any one of claims 1 to 10 is applicable.

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