Distribution transformer combined type insulation sealing cover and transformer thereof

Abstract

The invention belongs to the technical field of distribution transformer insulation sealing structures, and particularly relates to a distribution transformer combined insulation sealing cover and a transformer thereof. Comprising a transverse insulation sealing cover and a longitudinal insulation sealing cover. The transverse insulation sealing cover is used for insulation sealing of a plurality of transformer bushings which are perpendicular to the edge of the adjacent transformer top cover plate. Comprising a transverse insulation sealing cover and a transverse insulation sealing cover. The longitudinal insulating sealing cover is used for insulating and sealing a plurality of transformer bushings which are parallel to the edge of a cover plate at the top of the adjacent transformer; comprising a longitudinal insulation sealing cover and a longitudinal insulation sealing cover. The hot-line operation performance of a traditional distribution transformer can be effectively improved, the safety of the distribution transformer in the non-power-cut operation process is effectively guaranteed, the requirement for non-power-cut operation can be met on the premise that the structure and the use mode of the traditional transformer are not changed, the use stability of the distribution transformer is improved, and the use cost of the distribution transformer is reduced. And the use and maintenance difficulty of the distribution transformer is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of insulating and enclosing structures of distribution transformers, and in particular relates to a combined insulating and enclosing cover of a distribution transformer and a transformer thereof. Background Art

[0002] The voltage levels of the high and low voltage sides of distribution transformers are different, and can generally be divided into ultra-high voltage (750kV and above), extra-high voltage (500kV) transformers, 220-110kV transformers, 35kV and below transformers. The voltage level of the power transformer that directly supplies power to end users is as high as 10-35kV; relatively speaking, no matter which level, it is in the high voltage range that is extremely harmful to biological organisms. Therefore, there are risks in various operations on distribution transformers. At the same time, high voltage leads to higher electrical breakdown and flow capacity. Various unexpected dropped objects may cause high and low voltage to be connected between the conductive poles of the distribution transformer, which may not be directly discovered from the appearance. Therefore, with the continuous emphasis on ensuring power supply stability and promoting non-stop operations, the above problems will directly bring great safety risks to power operators. Summary of the invention

[0003] The purpose of the present invention is to provide a combined insulating enclosure cover that can be used for non-stop operations and used in conjunction with distribution transformers, based on actual needs, to improve the safety of distribution transformer installation, disassembly and maintenance, improve the insulation level and effect of transformers in daily use, and prevent external interference, and at the same time provide a corresponding transformer.

[0004] To achieve the above purpose, the present invention adopts the following technical solution.

[0005] A combined insulating enclosure for a distribution transformer, comprising a transverse insulating enclosure 1 and a longitudinal insulating enclosure 2;

[0006] The transverse insulating sealing cover 1 is used for insulating and sealing a plurality of transformer bushings connected perpendicularly to the edge of the adjacent transformer top cover 30; it comprises a transverse insulating sealing cover 10 and a transverse insulating sealing cover 11;

[0007] The horizontal insulating enclosure 10 is of a rectangular shell structure with an opening at the bottom. On its top shell surface, there are lead holes 100 facing each transformer bushing. One side shell surface of the rectangular shell structure facing the edge of the top cover 30 of the transformer extends downward and then bends inward to form a U-shaped buckle structure that can be buckled on the edge of the top cover 30 of the transformer. At least one of the two side shell surfaces connected to this side shell surface is provided with a wiring operation port 101, and connecting screw holes 102 are provided on the shell surfaces on both sides of the wiring operation port 101; the lead hole 100 and the operation port 101 are connected through a wire passing port 103; connecting screw holes are provided on the top shell surface near the operation port 101; the horizontal insulating cover 11 is of a bent plate structure with an inverted L-shaped cross-section. The horizontal insulating cover 11 is buckled on the operation port 101, and its top plate surface is buckled on the top shell surface of the horizontal insulating enclosure 10; connecting through holes are provided at positions on the two plate surfaces of the horizontal insulating cover 11 facing the connecting screw holes, and the connecting through holes and the corresponding connecting screw holes are connected by wing nuts 3.

[0008] The longitudinal insulating enclosure 2 is used for the insulating enclosure of the connections of multiple transformer bushings whose wires are parallel to the edge of the top cover 30 of the adjacent transformer; it includes a longitudinal insulating enclosure 20 and a longitudinal insulating cover 21.

[0009] The longitudinal insulating enclosure 20 is of a rectangular shell structure with an opening at the bottom. On its top shell surface, there are lead holes facing each transformer bushing. One side shell surface of the rectangular shell structure facing the edge of the top cover 30 of the transformer extends downward and then bends inward to form a U-shaped buckle structure that can be buckled on the edge of the top cover 30 of the transformer. A wiring operation port is provided on the shell surface opposite to this side shell surface, and connecting screw holes are provided on the shell surfaces on both sides of the wiring operation port; the lead hole 100 and the operation port are connected through a wire passing port; connecting screw holes are provided on the top shell surface near the operation port 101; the longitudinal insulating cover 21 is of a bent plate structure with an inverted L-shaped cross-section. The longitudinal insulating cover 21 is buckled on the operation port, and its top plate surface is buckled on the top shell surface of the longitudinal insulating enclosure; connecting through holes are provided at positions on the two plate surfaces of the longitudinal insulating cover 21 facing the connecting screw holes, and the connecting through holes and the corresponding connecting screw holes are connected by wing nuts 3.

[0010] For a further improvement or preferred implementation of the aforementioned combined insulating enclosure of the distribution transformer, through holes are provided at the bottom of the U-shaped buckle structure, and threaded connection holes are provided at positions on the edge of the top cover 30 of the transformer facing the through holes. The U-shaped buckle structure is fixedly connected by wing nuts provided in the through holes and the threaded connection holes.

[0011] For a further improvement or preferred implementation of the aforementioned combined insulating enclosure of the distribution transformer, the horizontal insulating enclosure 10, the horizontal insulating cover 11, the longitudinal insulating enclosure 20, and the longitudinal insulating cover 21 are made of insulating materials.

[0012] As a further improvement or preferred embodiment of the aforementioned combined insulating enclosure for distribution transformer, the transverse insulating enclosure 10, the transverse insulating enclosure cover 11, the longitudinal insulating enclosure 20, and the longitudinal insulating enclosure cover 21 are made of polypropylene or polycarbonate.

[0013] A transformer including a combined insulating enclosure for a distribution transformer, comprising a transformer box 3;

[0014] A distribution transformer is arranged in the transformer box 1. The edge of the top cover 30 of the transformer box 1 extends outward from the side cover to form a fixed eave 31. The top cover 30 is provided with high-voltage contact mounting holes and medium- and low-voltage contact mounting holes; the high-voltage contact mounting holes and the medium- and low-voltage contact mounting holes are arranged on both sides of the top cover 30.

[0015] A further improvement or preferred embodiment of the above transformer having a combined insulating enclosure for a distribution transformer further includes a transformer high voltage contact assembly 5 and a transformer medium and low voltage bushing assembly 6;

[0016] The high-voltage contact assembly 5 comprises: a high-voltage conductive rod 50 extending from the high-voltage contact mounting hole and connected to the high-voltage side of the distribution transformer, an insulating cover 51 sleeved on the high-voltage conductive rod 50 and buckled on the high-voltage contact mounting hole, and a high-voltage insulator 52 sleeved on the high-voltage conductive rod 50 and located on the top of the insulating cover 51;

[0017] The transformer medium and low voltage bushing assembly 6 includes: a medium and low voltage conductive rod 60 extending from the medium and low voltage contact mounting hole and connected to the medium and low voltage side of the distribution transformer, and a medium and low voltage insulator 61 sleeved on the medium and low voltage conductive rod 60 and buckled on the medium and low voltage contact mounting hole.

[0018] Its beneficial effects are:

[0019] The combined insulating enclosure of the distribution transformer of the present application can effectively improve the live operating performance of the traditional distribution transformer, effectively ensure the safety of the distribution transformer during non-stop operation, and can meet the needs of non-stop operation without changing the structure and use of the traditional transformer. The insulating enclosure structure cooperates with the transformer structure to effectively improve the insulation level of the distribution transformer and enhance the ability of the transformer to resist interference from external unexpected factors, which is beneficial to improving the stability of the use of the distribution transformer and reducing the difficulty of using and maintaining the distribution transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of a transformer including a combined insulating enclosure for a distribution transformer;

[0021] Figure 2 It is a schematic diagram of the installation of the combined insulating enclosure of the distribution transformer;

[0022] Figure 3 It is a schematic diagram of the structure of a combined insulating enclosure of a distribution transformer;

[0023] The reference numerals include:

[0024] A horizontal insulation sealing cover (1), a horizontal insulation sealing cover (10), a lead hole (100), a wiring operation port (101), a connection screw hole (102), a wire passing port (103), a horizontal insulation sealing cover (11), a longitudinal insulation sealing cover (2), a longitudinal insulation sealing cover (20), a longitudinal insulation sealing cover (21), a transformer box (3), a top cover plate (30), a fixed eaves (31), a transformer high-voltage contact assembly (5), a high-voltage conductive rod (50), an insulation cover tube (51), a high-voltage insulator (52), a transformer medium- and low-voltage bushing assembly (6), a medium- and low-voltage conductive rod (60), and a medium- and low-voltage insulator (61). DETAILED DESCRIPTION

[0025] The present invention is described in detail below in conjunction with specific embodiments.

[0026] The combined insulating enclosure cover of a distribution transformer of the present invention is mainly used to improve a traditional distribution transformer and improve its insulating enclosure so that it has higher safety during non-stop operation and reduces the danger of various live operations. At the same time, it has better resistance to external interference during daily use and enhances its insulation safety.

[0027] like Figure 1 As shown, the combined insulation enclosure of the distribution transformer of the present application mainly includes a transverse insulation enclosure 1 and a longitudinal insulation enclosure 2;

[0028] like Figure 2 , Figure 3 As shown, the two insulating enclosure structures are adapted to different installation forms of transformer bushings on distribution transformers, so that they have sufficient insulation safety and can be installed, disassembled and maintained more conveniently.

[0029] The transverse insulating sealing cover 1 is used for insulating and sealing a plurality of transformer bushings connected perpendicularly to the edge of the adjacent transformer top cover 30; it includes a transverse insulating sealing cover 10 and a transverse insulating sealing cover 11;

[0030] The horizontal insulation enclosure 10 is a rectangular shell structure with an opening at the bottom. On its top shell surface, there are lead holes 100 facing each transformer bushing. One side shell surface of the rectangular shell structure facing the edge of the transformer top cover plate 30 extends downward and then bends inward to form a U-shaped buckle structure that can be buckled on the edge of the transformer top cover plate 30. At least one of the two side shell surfaces connected to this side shell surface is provided with a wiring operation port 101, and connection screw holes 102 are provided on the shell surfaces on both sides of the wiring operation port 101; the lead hole 100 and the operation port 101 are connected through a wire passing port 103; connection screw holes are provided on the top shell surface near the operation port 101; the horizontal insulation cover 11 is a bent plate structure with an inverted L-shaped cross-section, and the horizontal insulation cover 11 is buckled on the operation port 101, and its top plate surface is buckled on the top shell surface of the horizontal insulation enclosure 10; connection through holes are provided at positions on the two plate surfaces of the horizontal insulation cover 11 facing the link screw holes, and the connection through holes and the connection screw holes at the corresponding positions are connected by wing bolts 3;

[0031] The longitudinal insulation enclosure 2 is used for the insulation enclosure of the connection wires parallel to multiple transformer bushings adjacent to the edge of the transformer top cover plate 30; it includes a longitudinal insulation enclosure 20 and a longitudinal insulation cover 21;

[0032] The longitudinal insulation enclosure 20 is a rectangular shell structure with an opening at the bottom. On its top shell surface, there are lead holes facing each transformer bushing. One side shell surface of the rectangular shell structure facing the edge of the transformer top cover plate 30 extends downward and then bends inward to form a U-shaped buckle structure that can be buckled on the edge of the transformer top cover plate 30. A wiring operation port is provided on the shell surface opposite to this side shell surface, and connection screw holes are provided on the shell surfaces on both sides of the wiring operation port; the lead hole 100 and the operation port are connected through a wire passing port; connection screw holes are provided on the top shell surface near the operation port 101; the longitudinal insulation cover 21 is a bent plate structure with an inverted L-shaped cross-section, and the longitudinal insulation cover 21 is buckled on the operation port, and its top plate surface is buckled on the top shell surface of the longitudinal insulation enclosure; connection through holes are provided at positions on the two plate surfaces of the longitudinal insulation cover 21 facing the link screw holes, and the connection through holes and the connection screw holes at the corresponding positions are connected by wing bolts 3.

[0033] To prevent the insulation enclosure from falling off, it can be designed as a detachable semi-permanent transformer structure. Specifically, when implemented, through holes can be provided at the bottom of the U-shaped buckle structure, and threaded connection holes are provided at positions on the edge of the transformer top cover plate 30 facing the through holes. The U-shaped buckle structure is fixedly connected through the wing bolts provided in the through holes and the threaded connection holes. The insulation enclosure can be conveniently disassembled and assembled through the bolts, and the device can be effectively prevented from falling.

[0034] To further improve the insulation effect, the horizontal insulation enclosure 10, the horizontal insulation cover 11, the longitudinal insulation enclosure 20, and the longitudinal insulation cover 21 can be made of insulating materials.

[0035] Preferably, the transverse insulating sealing cover 10, the transverse insulating sealing cover 11, the longitudinal insulating sealing cover 20, and the longitudinal insulating sealing cover 21 are made of polypropylene or polycarbonate.

[0036] The present application also provides a transformer structure including the aforementioned insulating enclosure,

[0037] like Figure 1 As shown, a transformer with a combined insulating enclosure for a distribution transformer includes a transformer box 3;

[0038] A distribution transformer is arranged in the transformer box 1. The edge of the top cover 30 of the transformer box 1 extends outward from the side cover to form a fixed eave 31. The top cover 30 is provided with high-voltage contact mounting holes and medium- and low-voltage contact mounting holes; the high-voltage contact mounting holes and the medium- and low-voltage contact mounting holes are arranged on both sides of the top cover 30.

[0039] It also includes a transformer high-voltage contact assembly 5 and a transformer medium- and low-voltage bushing assembly 6;

[0040] The high-voltage contact assembly 5 comprises: a high-voltage conductive rod 50 extending from the high-voltage contact mounting hole and connected to the high-voltage side of the distribution transformer, an insulating cover 51 sleeved on the high-voltage conductive rod 50 and buckled on the high-voltage contact mounting hole, and a high-voltage insulator 52 sleeved on the high-voltage conductive rod 50 and located on the top of the insulating cover 51;

[0041] The transformer medium and low voltage bushing assembly 6 includes: a medium and low voltage conductive rod 60 extending from the medium and low voltage contact mounting hole and connected to the medium and low voltage side of the distribution transformer, and a medium and low voltage insulator 61 sleeved on the medium and low voltage conductive rod 60 and buckled on the medium and low voltage contact mounting hole.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A combined insulating enclosure for a distribution transformer, characterized in that: It includes a horizontal insulating enclosure (1) and a vertical insulating enclosure (2); The horizontal insulating enclosure (1) is used for the insulating enclosure of multiple transformer bushings whose connecting wires are perpendicular to the edge of the top cover plate (30) of the adjacent transformer; it includes a horizontal insulating enclosure (10) and a horizontal insulating cover (11); the horizontal insulating enclosure (10) is a rectangular shell structure with an open bottom, and lead holes (100) facing each transformer bushing are provided on the top shell surface thereof. One side shell surface of the rectangular shell structure facing the edge of the top cover plate (30) of the transformer extends downward and then bends inward to form a U-shaped buckle structure that can be buckled on the edge of the top cover plate (30) of the transformer. At least one of the two side shell surfaces connected to this side shell surface is provided with a wiring operation port (101), and connection screw holes (102) are provided on the shell surfaces on both sides of the wiring operation port (101); the lead hole (100) is communicated with the operation port (101) through a wire passing port (103); connection screw holes are provided on one side of the top shell surface close to the operation port (101); the horizontal insulating cover (11) is a bent plate structure with an inverted L-shaped cross-section, and the horizontal insulating cover (11) is buckled on the operation port (101), and its top plate surface is buckled on the top shell surface of the horizontal insulating enclosure (10); connection through holes are provided at positions on the two plate surfaces of the horizontal insulating cover (11) that are opposite to the connection screw holes, and the connection through holes and the connection screw holes at the corresponding positions are connected by wing bolts (3). The vertical insulating enclosure (2) is used for the insulating enclosure of multiple transformer bushings whose connecting wires are parallel to the edge of the top cover plate (30) of the adjacent transformer; it includes a vertical insulating enclosure (20) and a vertical insulating cover (21); the vertical insulating enclosure (20) is a rectangular shell structure with an open bottom, and lead holes facing each transformer bushing are provided on the top shell surface thereof. One side shell surface of the rectangular shell structure facing the edge of the top cover plate (30) of the transformer extends downward and then bends inward to form a U-shaped buckle structure that can be buckled on the edge of the top cover plate (30) of the transformer. A wiring operation port is provided on the shell surface opposite to this side shell surface, and connection screw holes are provided on the shell surfaces on both sides of the wiring operation port; the lead hole (100) is communicated with the operation port through a wire passing port; connection screw holes are provided on one side of the top shell surface close to the operation port (101); the vertical insulating cover (21) is a bent plate structure with an inverted L-shaped cross-section, and the vertical insulating cover (21) is buckled on the operation port, and its top plate surface is buckled on the top shell surface of the vertical insulating enclosure; connection through holes are provided at positions on the two plate surfaces of the vertical insulating cover (21) that are opposite to the connection screw holes, and the connection through holes and the connection screw holes at the corresponding positions are connected by wing bolts (3).

2. The combined insulating enclosure for distribution transformer according to claim 1, characterized in that: A through hole is provided at the bottom of the U-shaped buckle structure, and a threaded connection hole is provided at a position on the edge of the top cover plate (30) of the transformer that is opposite to this through hole. The U-shaped buckle structure is fixedly connected by wing bolts provided in this through hole and the threaded connection hole.

3. The combined insulating enclosure for distribution transformer according to claim 1, characterized in that: The horizontal insulating enclosure (10), the horizontal insulating cover (11), the vertical insulating enclosure (20), and the vertical insulating cover (21) are made of insulating materials.

4. The combined insulating enclosure for distribution transformer according to claim 1, characterized in that: The transverse insulating sealing cover (10), the transverse insulating sealing cover (11), the longitudinal insulating sealing cover (20), and the longitudinal insulating sealing cover (21) are made of polypropylene material or polycarbonate.

5. A transformer comprising a combined insulating enclosure for a distribution transformer according to any one of claims 1 to 4, characterized in that: It includes a transformer box (3); A distribution transformer is arranged in the transformer box (1); the edge of the top cover plate (30) of the transformer box (1) extends outward from the side cover plate to form a fixed eave (31); a high-voltage contact mounting hole and a medium- and low-voltage contact mounting hole are arranged on the top cover plate (30); the high-voltage contact mounting hole and the medium- and low-voltage contact mounting hole are arranged on both sides of the top cover plate (30).

6. The transformer having a combined insulating enclosure for a distribution transformer according to claim 5, characterized in that: It also includes a transformer high-voltage contact assembly (5) and a transformer medium- and low-voltage bushing assembly (6); The high-voltage contact assembly (5) comprises: a high-voltage conductive rod (50) extending from a high-voltage contact mounting hole and connected to the high-voltage side of the distribution transformer, an insulating cover tube (51) sleeved on the high-voltage conductive rod (50) and buckled on the high-voltage contact mounting hole, and a high-voltage insulator (52) sleeved on the high-voltage conductive rod (50) and located on the top of the insulating cover tube (51); The transformer medium and low voltage bushing assembly (6) comprises: a medium and low voltage conductive rod (60) extending from a medium and low voltage contact mounting hole and connected to the medium and low voltage side of the distribution transformer, and a medium and low voltage insulator (61) sleeved on the medium and low voltage conductive rod (60) and buckled on the medium and low voltage contact mounting hole.

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