Dry-type power transformer

Abstract

The invention provides a dry-type power transformer, and relates to the field of power transformers, a main body of a cover body B is of a U-shaped structure with a one-way opening at the front end, an insertion block is fixedly connected to the front end face of the cover body B, and the insertion block is of a structure protruding out of the cover body B. The problem that an effective quick release structure is lacked in the prior art is solved, so that after an internal enameled wire is wrapped by an outer shell, the enameled wire cannot be detached from the outer shell. The problems that when maintenance is needed, shells need to be detached one by one to be used, an effective safe connection structure is lacked when the shells are detached for maintenance, and an operator is easily injured by high voltage generated by the transformer due to the fact that the shells are not thoroughly disconnected are solved. Hydraulic oil located in the sleeve is supplied into a sealing pipe arranged on the outer side of the inserting block through a connecting pipe to achieve rapid and tight connection operation of the cover body A and the cover body B, so that after connection is completed, efficient shielding protection operation can be achieved; according to the design, through linkage of the cover body A and the cover body B, the purpose of wrapping the voltage transformation assembly can be achieved.

Description

Technical Field

[0001] The invention belongs to the field of power transformers, and in particular relates to a dry-type power transformer. Background Art

[0002] The iron core of the dry-type power transformer is made of high-permeability high-quality grain-oriented cold-rolled silicon steel sheets, with 45° fully inclined stepped joints. The iron core adopts a special square tube pull plate structure, the core column is tied with insulating tape, and the surface of the iron core is coated with a special resin to prevent moisture and rust, which effectively reduces no-load loss, no-load current and iron core noise; For example, application number: "CN200810021935.2", dry-type power transformer, the present invention relates to a dry-type power transformer, belonging to the technical field of transformers, the present invention is an improvement on the structure of the existing dry-type power transformer, the main feature is that each phase winding of the high-voltage winding is composed of two independent windings, the upper and lower windings are separated by an insulating spacer, and are divided into two independent 10KV windings, the present invention does not affect the mechanical and electrical properties of the product by changing the high-voltage winding structure, and plays a connecting role in the transition process from 10KV power grid to 20KV power grid. The primary side voltage of 10KV and 20KV can be switched freely, and the secondary side is not affected in any way. Compared with 10KV, the power supply capacity is increased, the voltage quality is guaranteed, the power loss of the power grid is reduced, and the construction cost of the power grid is saved. At the same time, it also has all the functions of a 20KV transformer and is more in line with the distribution of urban power grids.

[0003] With reference to the above patents and prior art, it is known that the existing dry-type power transformer lacks an effective quick-disconnect structure when in use. When the internal enameled wire is wrapped by the outer shell, when maintenance is required, the shells need to be removed one by one before use. In addition, there is a lack of effective safety connection structure when disassembling for maintenance. As a result, it is easy for the transformer to generate high voltage and cause injuries to the operator due to failure to completely disconnect during use.

[0004] Therefore, in view of the shortcomings of the above scheme in actual production and implementation, it is revised and improved. At the same time, in the spirit and concept of seeking for excellence, with the assistance of professional knowledge and experience, and after many ingenuity and experiments, the present invention is created. In particular, a dry-type power transformer is provided to solve the problem that due to the lack of an effective quick-disconnect structure, after the internal enameled wire is wrapped by the outer shell, when maintenance is required, the shells need to be removed one by one before use, and there is a lack of an effective safety connection structure when it is disassembled for maintenance, so that when it is used, it is easy to cause high voltage to the transformer and cause injuries to the operator due to failure to completely disconnect. Summary of the invention

[0005] The present invention proposes a dry-type power transformer, which solves the problem in the prior art that, after the internal enameled wire is covered by the outer shell, when maintenance is required, the shells need to be removed one by one before use, and there is a lack of an effective safety connection structure when it is disassembled for maintenance, which makes it easy for the transformer to generate high voltage and cause injuries to the operator due to failure to completely disconnect during use.

[0006] The technical solution of the present invention is implemented as follows: a dry-type power transformer comprises a branch pipe, the main body of the branch pipe is a square tube structure, and the branch pipe is provided at two locations, the two branch pipes are arranged in a longitudinal array, and the rear side of the branch pipe located at the front side is fixedly connected with a cover body A, the main body of the cover body A is a U-shaped structure with a one-way opening at the rear side, and the cover body A is provided at three locations, the three cover bodies A are fixedly connected to the rear end surface of the branch pipe located at the front side in a linear array, and the branch pipe and the cover body A together form a limiting structure, the rear side of the cover body A is provided with a groove, the groove is a slot, and the rear side of each cover body A is provided with two locations in a linear array. The cover body B is fixedly connected to the front end of the branch pipe at the rear side, and the structure of the cover body B is consistent with that of the cover body A. The cover body B is provided at three locations, and the three cover bodies B are fixedly connected to the front end surface of the branch pipe at the rear side in a linear array, and the positions of the three cover bodies B are consistent with the positions of the three cover bodies A, and the main body of the cover body B is a U-shaped structure with a one-way opening at the front end, and an insert block is fixedly connected to the front end surface of the cover body B, and the insert block is a structure protruding from the cover body B, and the insert block and the cover body B together form a connection structure, and a sealing tube is fixedly connected to the outside of the insert block, and the sealing tube is sleeved on the outer side of the insert block: As a preferred embodiment, the sealing tube is an internal hollow structure, and the sealing tube and the plug together constitute a limiting structure, and the two branch pipes are located directly above the base, the main body of the base is longitudinally arranged, and there are three bases in total, the three bases are arranged in a linear array, a longitudinal groove is opened inside the base, the longitudinal groove is a guide groove, the guide groove and the base together constitute a guide structure, and a through hole is opened inside the base, the through hole is a mounting hole, two mounting holes are opened inside each base in a linear array, and the base and the mounting hole together constitute a connecting structure.

[0007] As a preferred embodiment, a servo push rod is installed inside the guide groove, and two servo push rods are installed opposite to each other inside each guide groove, the two servo push rods installed in the guide groove are arranged opposite to each other, and the guide groove and the servo push rod together constitute an adjustment structure, and a bottom plate is fixedly connected to the top surface of the base, the main body of the bottom plate is arranged horizontally, and the length of the bottom plate is consistent with the length between the three bases, the bottom plate and the base together constitute a connecting structure, and the bottom plate is fixedly connected to the center position of the top surface of the base, and the base and the bottom plate together constitute a supporting structure.

[0008] As a preferred embodiment, a moving seat is fixedly connected to the bottom end surface of the branch pipe, and two moving seats are fixedly connected to the bottom end surface of each branch pipe in a linear array, the moving seat and the branch pipe together constitute a guide structure, and a slider is fixedly connected to the outer side of the moving seat, the slider is a structure protruding from the moving seat, and two sliders are fixedly connected to the outer side of each moving seat in opposite directions, the moving seat is slidably connected to the inner position of the guide groove opened in the base through the slider fixedly connected on the outer side thereof, and the moving seat is connected to a servo push rod fixedly connected in the guide groove, and a guide rod is fixedly connected to the inner side of the moving seat.

[0009] As a preferred embodiment, the main body of the guide rod is a cylindrical structure, and a piston is fixedly connected to the rear side of the guide rod. The piston is made of rubber, and the diameter of the piston is larger than the diameter of the guide rod. The guide rod and the piston together constitute a limiting structure. The front end of the movable seat located at the rear side is fixedly connected to a sleeve, and the interior of the sleeve is filled with hydraulic oil. The sleeve is an internal hollow structure, the piston and the guide rod are inserted into the inner position of the sleeve, and a connecting pipe is fixedly connected to the top end surface of the sleeve. The main body of the connecting pipe is a flexible structure, and the connecting pipe is connected to the sleeve and is used to guide the hydraulic oil in the sleeve.

[0010] As a preferred embodiment, the connecting pipe is connected to the cover body B fixedly connected to the front end of the branch pipe located on the rear side, and is connected to the sealing tube fixedly connected to the outside of the plug, and the sealing tube is connected to the sleeve through the connecting pipe, and a transformer assembly is fixedly connected to the top end surface of the base plate, and the transformer assembly is an enameled wire structure, and there are three transformer assemblies in total, and the three transformer assemblies are fixedly connected to the top end surface of the base plate in a linear array, and the three transformer assemblies are respectively located at the inner side positions of the three cover bodies A and the cover body B, the transformer assembly and the base plate together constitute a transformer structure, and a connecting frame is fixedly connected to the top end surface of the transformer assembly, and the main body of the connecting frame is a Z-shaped structure.

[0011] As a preferred embodiment, the connecting plate and the connecting frame are vertically arranged, and a through hole is opened inside the connecting plate, which is a threading hole, and the inner wall of the threading hole is covered with a metal sheet, and a contact plate is fixedly connected to the outer side of the threading hole, the contact plate is made of metal, and the contact plate is connected to the metal sheet fixedly connected in the threading hole, and the contact plate is used to conduct electricity, and the top surfaces of the cover body A and the cover body B are fixedly connected to a guide frame.

[0012] As a preferred embodiment, two connecting frames are fixedly connected to the top surface of each transformer assembly in a linear array, and the main body of the connecting frame is an insulating structure, and a groove is provided on the outside of the connecting frame, which is an assembly groove, and an adsorption assembly is fixedly connected to the inside of the assembly groove, and the adsorption assembly is an electromagnetic block structure, and the adsorption assembly is an annular structure, and the connecting frame and the adsorption assembly together constitute a limiting structure, and a connecting plate is fixedly connected to the top surface of the connecting frame, and the connecting plate and the connecting frame together constitute a limiting structure.

[0013] As a preferred embodiment, the guide frame is vertically arranged to the top surfaces of the cover body A and the cover body B, and a longitudinal groove is opened inside the guide frame. A guide rod is fixedly connected to the inside of the longitudinal groove, and the guide rod is a cylindrical structure. The guide rod is longitudinally arranged on the inner side of the guide frame, and the guide frame and the guide rod together constitute a guiding structure.

[0014] As a preferred embodiment, a guide block is installed inside the guide frame, and a screw hole matching the guide rod is opened inside the guide block, and a plug-in block is fixedly connected to the side of the guide block away from the guide frame, and two guide blocks are fixedly connected to the outside of the plug-in block in opposite directions, the guide block is a structure protruding from the plug-in block, and a contact rod is fixedly connected to the top surface of the plug-in block, a metal sheet is bonded to the top surface of the contact rod, and a screw hole is opened inside the contact rod, a fixing bolt is screwed inside the screw hole, and the fixing bolt and the contact rod together constitute a limiting structure.

[0015] After adopting the above technical solution, the beneficial effects of the present invention are: 1. In the present invention, by providing a cover body A and a cover body B with a split structure, under normal conditions, the cover body A and the cover body B can be in a closed state to achieve a wrapping and protection operation for the transformer assembly arranged on the top surface of the bottom plate, and when the cover body A and the cover body B are in the closing process, the guide rod can also drive the piston to move toward the inside of the sleeve through the movement of the movable seat, and the hydraulic oil in the sleeve can be supplied to the inner position of the sealing tube arranged on the outside of the plug through the pipe to achieve a quick and tight connection operation for the cover body A and the cover body B, so that after the connection is completed, an efficient shielding and protection operation can be achieved. This design can achieve the purpose of covering the transformer assembly through the linkage of the cover body A and the cover body B.

[0016] 2. In the present invention, by providing a contact rod with a split structure and a contact plate fixedly connected to the outside of the connecting plate, when the cover body A and the cover body B are separated to inspect the transformer assembly arranged on the top surface of the bottom plate, an automatic power-off operation can be achieved by disengaging the contact rod from the contact plate arranged on the outside of the connecting plate. At this time, the wiring harness arranged in the connecting plate can be normally inspected without being disassembled, and the connecting frame with an insulating structure ensures that the wiring harness will not cause injury to the operator due to being electrified even after the connection is completed, thereby further improving the overall practicality and safety of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 It is a schematic diagram of the front and side structure of the dry-type power transformer after being disassembled according to the present invention; Figure 2 It is a schematic diagram of the combined structure of the dry-type power transformer of the present invention; Figure 3 It is a schematic diagram of the combined structure of the base and the guide groove of the dry-type power transformer of the present invention; Figure 4 It is a schematic diagram of the combined structure of the transformer assembly and the connecting frame of the dry-type power transformer of the present invention; Figure 5 It is a schematic diagram of the combined structure of the cover body A and the cover body B of the dry-type power transformer of the present invention; Figure 6 It is a schematic diagram of the combined structure of the plug-in block and the guide block of the dry-type power transformer of the present invention; Figure 7 It is a schematic diagram of the combined structure of the connection plate and the threading hole of the dry-type power transformer of the present invention; Figure 8 It is a schematic diagram of the dry-type power transformer of the present invention viewed from above and from the side; In the figure, 1, base; 2, guide groove; 3, mounting hole; 4, servo push rod; 5, bottom plate; 6, moving seat; 7, slider; 8, branch pipe; 9, guide rod; 10, piston; 11, sleeve; 12, connecting pipe; 13, transformer assembly; 14, connecting frame; 15, assembly groove; 16, adsorption assembly; 17, connecting plate; 18, threading hole; 19, contact plate; 20, cover body A; 21, slot; 22, cover body B; 23, plug-in block; 24, sealing tube; 25, guide frame; 26, guide rod; 27, guide block; 28, plug-in block; 29, guide block; 30, contact rod; 31, fixing bolt. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] like Figure 1-Figure 8As shown, the dry-type power transformer includes: a branch pipe 8, the main body of the branch pipe 8 is a square tube structure, and the branch pipe 8 is provided at two locations, the two branch pipes 8 are arranged in a longitudinal array, and the rear side of the branch pipe 8 located at the front side is fixedly connected with a cover body A20, the main body of the cover body A20 is a U-shaped structure with a one-way opening at the rear side, and the cover body A20 is provided at three locations, the three cover bodies A20 are fixedly connected to the rear end surface of the branch pipe 8 located at the front side in a linear array, and the branch pipe 8 and the cover body A20 together form a limiting structure A groove is provided on the rear side of the cover body A20, and the groove is a slot 21. Two slots 21 are provided on the rear side of each cover body A20 in a linear array, and a cover body B22 is fixedly connected to the front end of the branch pipe 8 located at the rear side, and the structure of the cover body B22 is consistent with that of the cover body A20, and there are three cover bodies B22 in total, and the three cover bodies B22 are fixedly connected to the front end surface of the branch pipe 8 located at the rear side in a linear array, and the positions of the three cover bodies B22 are consistent with the positions of the three cover bodies A20. The main body of the cover body B22 is a U-shaped structure with a one-way opening at the front end. The front end surface of the cover body B22 is fixedly connected with an insert block 23, which is a structure protruding from the cover body B22. The insert block 23 and the cover body B22 together form a connection structure. The outer side of the insert block 23 is fixedly connected with a sealing tube 24, which is sleeved on the outer side of the insert block 23. A guide block 27 is installed inside the guide frame 25, and a screw hole matching the guide rod 26 is opened inside the guide block 27. , and a plug-in block 28 is fixedly connected to one side of the guide block 27 away from the guide frame 25, and two guide blocks 29 are fixedly connected to the outer side of the plug-in block 28 in opposite directions, the guide blocks 29 are a structure protruding from the plug-in block 28, and a contact rod 30 is fixedly connected to the top surface of the plug-in block 28, a metal sheet is bonded to the top surface of the contact rod 30, and a screw hole is opened inside the contact rod 30, a fixing bolt 31 is screwed inside the screw hole, and the fixing bolt 31 and the contact rod 30 together constitute a limiting structure.

[0021] Among them, the sealing tube 24 is an internal hollow structure, and the sealing tube 24 and the plug block 23 together form a limiting structure, and the two branch pipes 8 are located directly above the base 1. The main body of the base 1 is longitudinally arranged, and the base 1 is provided with three bases, and the three bases 1 are arranged in a linear array. A longitudinal groove is opened inside the base 1, and the longitudinal groove is a guide groove 2. The guide groove 2 and the base 1 together form a guide structure, and a through hole is opened inside the base 1, and the through hole is a mounting hole 3. Two mounting holes 3 are opened inside each base 1 in a linear array, and the base 1 and the mounting hole 3 together form a connection Structure, a servo push rod 4 is installed inside the guide groove 2, and two servo push rods 4 are installed opposite to each other inside each guide groove 2, the two servo push rods 4 installed in the guide groove 2 are arranged opposite to each other, and the guide groove 2 and the servo push rod 4 together constitute an adjustment structure, and a bottom plate 5 is fixedly connected to the top end surface of the base 1, the main body of the bottom plate 5 is arranged horizontally, and the length of the bottom plate 5 is consistent with the length between the three bases 1, the bottom plate 5 and the base 1 together constitute a connecting structure, and the bottom plate 5 is fixedly connected to the center position of the top end surface of the base 1, and the base 1 and the bottom plate 5 together constitute a supporting structure.

[0022] Among them, a moving seat 6 is fixedly connected to the bottom end surface of the branch pipe 8, and two moving seats 6 are fixedly connected to the bottom end surface of each branch pipe 8 in a linear array. The moving seat 6 and the branch pipe 8 together constitute a guide structure, and a slider 7 is fixedly connected to the outer side of the moving seat 6. The slider 7 is a structure protruding from the moving seat 6, and two sliders 7 are fixedly connected to the outer side of each moving seat 6 in opposite directions. The moving seat 6 is slidably connected to the inner position of the guide groove 2 opened in the base 1 through the slider 7 fixedly connected on its outer side, and the moving seat 6 is connected to the servo push rod 4 fixedly connected to the guide groove 2, and the inner side of the moving seat 6 is fixedly connected to the guide rod 9. The main body of the rod 9 is a cylindrical structure, and a piston 10 is fixedly connected to the rear side of the guide rod 9. The piston 10 is made of rubber, and the diameter of the piston 10 is larger than the diameter of the guide rod 9. The guide rod 9 and the piston 10 together constitute a limiting structure. The front end of the movable seat 6 located at the rear side is fixedly connected to a sleeve 11, and the interior of the sleeve 11 is filled with hydraulic oil. The sleeve 11 is an internal hollow structure. The piston 10 and the guide rod 9 are inserted into the inner position of the sleeve 11, and a connecting pipe 12 is fixedly connected to the top end surface of the sleeve 11. The main body of the connecting pipe 12 is a flexible structure, and the connecting pipe 12 is connected to the sleeve 11 and is used to guide the hydraulic oil in the sleeve 11.

[0023] Among them, the connecting pipe 12 is connected to the cover body B22 fixedly connected to the front end of the branch pipe 8 located on the rear side, and is connected to the sealing tube 24 fixedly connected to the outside of the plug block 23, and the sealing tube 24 is connected to the sleeve 11 through the connecting pipe 12, and a transformer assembly 13 is fixedly connected to the top surface of the bottom plate 5, and the transformer assembly 13 is an enameled wire structure, and there are three transformer assemblies 13 in total, and the three transformer assemblies 13 are fixedly connected to the top surface of the bottom plate 5 in a linear array, and the three transformer assemblies 13 are respectively located at the inner side positions of the three covers A20 and the cover body B22, and the transformer assembly 13 and the bottom plate 5 together constitute a transformer structure, and the top of the transformer assembly 13 A connecting frame 14 is fixedly connected to the surface, and the main body of the connecting frame 14 is a Z-shaped structure, two connecting frames 14 are fixedly connected to the top surface of each transformer assembly 13 in a linear array, and the main body of the connecting frame 14 is an insulating structure, and a groove is opened on the outside of the connecting frame 14, and the groove is an assembly groove 15, and an adsorption component 16 is fixedly connected to the inside of the assembly groove 15, and the adsorption component 16 is an electromagnetic block structure, and the adsorption component 16 is an annular structure, and the connecting frame 14 and the adsorption component 16 together constitute a limiting structure, and a connecting plate 17 is fixedly connected to the top surface of the connecting frame 14, and the connecting plate 17 and the connecting frame 14 together constitute a limiting structure.

[0024] Among them, the connecting plate 17 and the connecting frame 14 are vertically arranged, and a through hole is opened inside the connecting plate 17, which is a threading hole 18, and the inner wall of the threading hole 18 is covered with a metal sheet, and the outer side of the threading hole 18 is fixedly connected with a contact plate 19, the contact plate 19 is made of metal, and the contact plate 19 is connected to the metal sheet fixedly connected in the threading hole 18, and the contact plate 19 is used to conduct electricity, and the top end surfaces of the cover body A20 and the cover body B22 are fixedly connected with a guide frame 25, the guide frame 25 and the top end surfaces of the cover body A20 and the cover body B22 are vertically arranged, and a longitudinal groove is opened inside the guide frame 25, and a guide rod 26 is fixedly connected inside the longitudinal groove, and the guide rod 26 is a cylindrical structure, and the guide rod 26 is longitudinally arranged at the inner side of the guide frame 25, and the guide frame 25 and the guide rod 26 together constitute a guiding structure.

[0025] When the dry-type transformer is used, the base 1 can be placed on the ground or on a pre-cast base, and the bolts can be passed through the mounting holes 3 provided in the base 1 to realize the rapid assembly of the dry-type transformer body. When wiring is performed, the wiring harness to be connected to the transformer assembly 13 provided on the top surface of the bottom plate 5 can be connected to the connecting plate 17 fixedly connected to the top surface of the connecting frame 14. When the external wiring harness is connected to the connecting plate 17, the wiring harness is peeled and inserted into the inner position of the threading hole 18 provided in the connecting plate 17, and the wiring harness is brought into contact with the metal sheet provided in the threading hole 18. After the connection is completed, if it is necessary to seal the transformer assembly 13 provided on the bottom plate 5, the movable seat 6 can be pushed inward by starting the servo push rod 4 installed in the guide groove 2. When the movable seat 6 moves inward, the slider 7 fixedly connected to the outer side of the movable seat 6 can be synchronously used to move inward along the guide groove 2 provided in the base 1. When the movable seat 6 moves inward, the branch pipe 8 fixedly connected to the top surface of the movable seat 6 can be synchronously driven to move inward. When the two branch pipes 8 move inward, the cover body A20 and the cover body B22 fixedly connected to the inner sides of the two branch pipes 8 can be synchronously driven to move inward, and the transformer assembly 13 disposed on the top surface of the bottom plate 5 can be synchronously covered. When the cover body A20 and the cover body B22 are close to each other, the plug block 23 fixedly connected to the outer side of the cover body B22 can be inserted into the inner position of the slot 21 provided on the inner side of the cover body A20. When the plug block 23 is inserted into the slot 21, the inward movement of the movable seat 6 can be synchronously used to drive the guide rod 9 to push the piston 10 to move inside the sleeve 11 arranged in the movable seat 6, and when the piston 10 moves, the hydraulic oil in the sleeve 11 can be synchronously quickly supplied to the inner position of the sealing tube 24 arranged outside the plug block 23 through the pipe 12 fixedly connected to the top surface of the sleeve 11, and the sealing tube 24 is filled to achieve a rapid shielding operation of the transformer assembly 13; And when the cover body B22 and the cover body A20 are in a closed state, the plug-in block 28 arranged on the outside of the guide block 27 can be synchronously driven to be inserted into the internal position of the assembly slot 15 opened in the connecting frame 14, and the adsorption component 16 opened in the assembly slot 15 is energized, and the adsorption connection of the plug-in block 28 is realized by generating magnetism after the adsorption component 16 is energized, so that the plug-in block 28 drives the contact rod 30 to move upward and contact the contact plate 19 fixedly connected to the outside of the connecting plate 17 to realize the automatic circuit connection operation.

[0026] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be the internal communication of two elements, it can be a direct connection, or it can be an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0027] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A dry-type power transformer, characterized in that: The invention comprises a branch pipe (8), wherein the main body of the branch pipe (8) is a square tube structure, and the branch pipe (8) is provided at two locations, the two branch pipes (8) are arranged in a longitudinal array, and the rear side of the branch pipe (8) located at the front side is fixedly connected to a cover body A (20), the main body of the cover body A (20) is a U-shaped structure with a one-way opening at the rear side, and the cover body A (20) is provided at three locations, the three cover bodies A (20) are fixedly connected to the rear end surface of the branch pipe (8) located at the front side in a linear array, and the branch pipe (8) and the cover body A (20) together form a limiting structure, the rear side of the cover body A (20) is provided with a groove, the groove is a slot (21), the rear side of each cover body A (20) is provided with two slots (21) in a linear array, and the front end of the branch pipe (8) located at the rear side is fixedly connected to A cover body B (22) is provided, and the structure of the cover body B (22) is consistent with the structure of the cover body A (20), and the cover body B (22) is provided at three locations, and the three cover bodies B (22) are fixedly connected to the front end surface of the branch pipe (8) located at the rear side in a linear array, and the positions of the three cover bodies B (22) are consistent with the positions of the three cover bodies A (20), and the main body of the cover body B (22) is a U-shaped structure with a one-way opening at the front end, and an insert block (23) is fixedly connected to the front end surface of the cover body B (22), and the insert block (23) is a structure protruding from the cover body B (22), and the insert block (23) and the cover body B (22) together form a connection structure, and a sealing tube (24) is fixedly connected to the outer side of the insert block (23), and the sealing tube (24) is sleeved on the outer side of the insert block (23).

2. The dry-type power transformer according to claim 1, characterized in that: The sealing tube (24) is an internal hollow structure, and the sealing tube (24) and the plug block (23) together form a limiting structure, and the two branch pipes (8) are both located directly above the base (1), the main body of the base (1) is arranged longitudinally, and the base (1) is provided with three bases in total, the three bases (1) are arranged in a linear array, a longitudinal groove is provided inside the base (1), the longitudinal groove is a guide groove (2), the guide groove (2) and the base (1) together form a guide structure, and a through hole is provided inside the base (1), the through hole is a mounting hole (3), two mounting holes (3) are provided inside each base (1) in a linear array, and the base (1) and the mounting hole (3) together form a connection structure.

3. The dry-type power transformer according to claim 2, characterized in that: A servo push rod (4) is installed inside the guide groove (2), and two servo push rods (4) are installed inside each guide groove (2) in an opposite manner. The two servo push rods (4) installed in the guide groove (2) are arranged in an opposite manner, and the guide groove (2) and the servo push rod (4) together form an adjustment structure. A bottom plate (5) is fixedly connected to the top surface of the base (1), the main body of the bottom plate (5) is arranged horizontally, and the length of the bottom plate (5) is consistent with the length between the three bases (1). The bottom plate (5) and the base (1) together form a connection structure, and the bottom plate (5) is fixedly connected to the center position of the top surface of the base (1). The base (1) and the bottom plate (5) together form a support structure.

4. The dry-type power transformer according to claim 1, characterized in that: A movable seat (6) is fixedly connected to the bottom end surface of the branch pipe (8), and two movable seats (6) are fixedly connected to the bottom end surface of each branch pipe (8) in a linear array. The movable seat (6) and the branch pipe (8) together form a guide structure, and a slider (7) is fixedly connected to the outer side of the movable seat (6). The slider (7) is a structure protruding from the movable seat (6), and two sliders (7) are fixedly connected to the outer side of each movable seat (6) in opposite directions. The movable seat (6) is slidably connected to the inner position of the guide groove (2) provided in the base (1) through the slider (7) fixedly connected to the outer side surface thereof, and the movable seat (6) is connected to a servo push rod (4) fixedly connected to the guide groove (2), and a guide rod (9) is fixedly connected to the inner side of the movable seat (6).

5. The dry-type power transformer according to claim 4, characterized in that: The main body of the guide rod (9) is a cylindrical structure, and a piston (10) is fixedly connected to the rear side of the guide rod (9). The piston (10) is made of rubber and has a diameter greater than that of the guide rod (9). The guide rod (9) and the piston (10) together form a limiting structure. The front end of the movable seat (6) located at the rear side is fixedly connected to a sleeve (11), and the interior of the sleeve (11) is filled with hydraulic oil. The sleeve (11) is an internal hollow structure. The piston (10) and the guide rod (9) are inserted into the inner side of the sleeve (11), and a pipe (12) is fixedly connected to the top end surface of the sleeve (11). The main body of the pipe (12) is a flexible structure, and the pipe (12) is connected to the sleeve (11) and is used to guide the hydraulic oil in the sleeve (11).

6. The dry-type power transformer according to claim 5, characterized in that: The connecting pipe (12) is connected to a cover body B (22) fixedly connected to the front end of the branch pipe (8) located at the rear side, and is connected to a sealing pipe (24) fixedly connected to the outside of the plug block (23), and the sealing pipe (24) is connected to the sleeve (11) through the connecting pipe (12). A transformer assembly (13) is fixedly connected to the top end surface of the bottom plate (5), and the transformer assembly (13) is an enameled wire structure. The transformer assembly (13) is provided at three locations, and the three transformer assemblies (13) are fixedly connected to the top end surface of the bottom plate (5) in a linear array. The three transformer assemblies (13) are respectively located at the inner side positions of the three covers A (20) and the cover body B (22). The transformer assembly (13) and the bottom plate (5) together form a transformer structure, and a connecting frame (14) is fixedly connected to the top end surface of the transformer assembly (13), and the main body of the connecting frame (14) is a Z-shaped structure.

7. The dry-type power transformer according to claim 6, characterized in that: Two connecting frames (14) are fixedly connected in a linear array on the top surface of each transformer assembly (13), and the main body of the connecting frame (14) is an insulating structure. A groove is provided on the outside of the connecting frame (14), and the groove is an assembly groove (15). An adsorption assembly (16) is fixedly connected inside the assembly groove (15), and the adsorption assembly (16) is an electromagnetic block structure. The adsorption assembly (16) is an annular structure, and the connecting frame (14) and the adsorption assembly (16) together form a limiting structure. A connecting plate (17) is fixedly connected to the top surface of the connecting frame (14), and the connecting plate (17) and the connecting frame (14) together form a limiting structure.

8. The dry-type power transformer according to claim 7, characterized in that: The connecting plate (17) and the connecting frame (14) are arranged vertically, and a through hole is opened inside the connecting plate (17), the through hole is a threading hole (18), and the inner wall of the threading hole (18) is covered with a metal sheet, and a contact plate (19) is fixedly connected to the outer side of the threading hole (18), the contact plate (19) is made of metal, and the contact plate (19) is connected to the metal sheet fixedly connected to the threading hole (18), and the contact plate (19) is used to conduct electricity, and the top surfaces of the cover body A (20) and the cover body B (22) are fixedly connected to the guide frame (25).

9. The dry-type power transformer according to claim 8, characterized in that: The guide frame (25) is vertically arranged with the top surfaces of the cover body A (20) and the cover body B (22), and a longitudinal groove is provided inside the guide frame (25). A guide rod (26) is fixedly connected inside the longitudinal groove, and the guide rod (26) is a cylindrical structure. The guide rod (26) is longitudinally arranged at an inner side of the guide frame (25), and the guide frame (25) and the guide rod (26) together form a guide structure.

10. The dry-type power transformer according to claim 9, characterized in that: A guide block (27) is installed inside the guide frame (25), and a screw hole matching the guide rod (26) is provided inside the guide block (27), and a plug-in block (28) is fixedly connected to the side of the guide block (27) away from the guide frame (25), and two guide blocks (29) are fixedly connected to the outside of the plug-in block (28) in opposite directions, the guide block (29) is a structure protruding from the plug-in block (28), and a contact rod (30) is fixedly connected to the top surface of the plug-in block (28), a metal sheet is bonded to the top surface of the contact rod (30), and a screw hole is provided inside the contact rod (30), and a fixing bolt (31) is screwed inside the screw hole, and the fixing bolt (31) and the contact rod (30) together form a limiting structure.

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