CN215988406U

CN215988406U - Combined transformer structure with looped network tapping

Info

Publication number: CN215988406U
Application number: CN202122599056.1U
Authority: CN
Inventors: 何申; 林春晓
Original assignee: Fujian Yiwanjia Electric Power Technology Co ltd
Current assignee: Fujian Yiwanjia Electric Power Technology Co ltd
Priority date: 2021-10-28
Filing date: 2021-10-28
Publication date: 2022-03-08
Anticipated expiration: 2031-10-28

Abstract

The utility model relates to an underground combined type transformer structure with high-voltage ring network tapping. The oil tank shell is provided with the high-voltage cable sleeve base, the plug-in fuse, the oil-immersed load switch of the transformer, the oil-immersed load switch of the ring network incoming line and the oil-immersed load switch of the ring network outgoing line, and the oil tank shell is further provided with the low-voltage wiring sealed cabin and the high-voltage operation sealed cabin. The structure of the utility model integrates the cable distribution box and the transformer into a buried combined transformer which can be distributed with a high-voltage network, the equipment factory is prefabricated, the construction cost is saved, the buried combined transformer can be installed in a buried way, and simultaneously, the buried combined transformer has the advantages of beautifying and coordinating the environment.

Description

Combined transformer structure with looped network tapping

Technical Field

The utility model relates to an oil-immersed underground combined transformer, in particular to an underground combined transformer structure with high-voltage ring network tapping.

Background

With the rapid development of urban construction, the larger and more the scheme of long-distance power supply is, the longer and more the 10KV power supply line of projects such as high speed, pipe gallery, bridge and the like, the longer the adjacent arrangement distance of transformers, the more the number of series connections, and the need of adopting high-voltage cables for voltage transmission. The current common scheme is that a cable distribution box is connected in front of each transformer to meet the power supply mode of a ring network hand, so that the problems of more operation and inspection work, improper installation position, large construction workload and the like of 10KV power equipment are caused.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provide a three-station plastic shell switch, which realizes three working states of disconnection, isolation and grounding on one switch, has complete interlocking, and is simpler and more convenient in power operation and maintenance, smaller in equipment size and easy to produce and install.

The utility model aims to overcome the defects and provides the underground combined type transformer structure with the high-voltage ring network shunting function, which can realize the prefabrication of equipment factories, save the construction cost, can be installed in an underground mode, and has the advantage of beautifying and coordinating the environment.

The utility model aims to solve the problems by the following technical scheme: the utility model provides a take buried combined transformer structure of high-pressure looped netowrk shunting, includes oil tank shell, plug-in fuse, transformer outgoing line's oil-immersed load switch, transformer core and coil, high-voltage cable bushing base, high-voltage cable head, high-pressure operation sealed storehouse, low pressure wiring sealed storehouse, looped netowrk incoming line's oil-immersed load switch, looped netowrk outgoing line's oil-immersed load switch. The transformer oil tank shell is formed by welding thick steel plates, 3-6 high-voltage cable sleeve bases are installed on the tank body, and 1-3 high-voltage oil-immersed load switches and plug-in fuses are arranged in the oil tank. The transformer is provided with a low-voltage wiring sealed cabin and a high-voltage operation sealed cabin. The transformer oil tank shell is formed by sealing and welding thick steel plates, and the whole tank body is subjected to hot dip galvanizing treatment after welding, so that the lasting corrosion resistance of coastal outdoor installation and underground installation is ensured.

Specifically, the utility model relates to an underground combined transformer structure with high-voltage ring network tapping, which comprises an oil tank shell, a plug-in fuse, an oil-immersed load switch of a transformer, a transformer iron core and a coil, a high-voltage cable bushing base, a high-voltage cable head, a high-voltage operation sealing bin, a low-voltage wiring sealing bin, an oil-immersed load switch of ring network incoming wires and an oil-immersed load switch of ring network outgoing wires, wherein the oil tank shell is respectively provided with the high-voltage cable bushing base, the plug-in fuse, the oil-immersed load switch of the transformer, the oil-immersed load switch of the ring network incoming wires and the oil-immersed load switch of the ring network outgoing wires, and the oil tank shell is also provided with the low-voltage wiring sealing bin and the high-voltage operation sealing bin; the high-voltage incoming wire of the high-voltage ring network of the power grid is led in from the base of the high-voltage cable sleeve and is connected with the A end of an oil-immersed load switch of the incoming wire of the ring network, the B end of the ring network outgoing line is connected with the B end of the oil-immersed load switch of the ring network outgoing line and the B end of the oil-immersed load switch of the transformer to form a common point, the outgoing line from the A end of the oil-immersed load switch of the ring network outgoing line is connected to a ring network circuit to form ring network tapping, the A end of the oil-immersed load switch of the transformer is connected with the A end of the incoming line end of the plug-in fuse, the B end of the outgoing line end of the plug-in fuse is connected to a high-voltage contact of an iron core and a coil of the transformer, the plug-in fuse is used as short circuit and overload protection of the combined transformer, the operation and the exit of the transformer are realized through the on-off operation of an oil-immersed load switch of the transformer, the connection and disconnection of a high-voltage ring network line are realized through the on-off operation of an oil-immersed load switch of a ring network outgoing line and an oil-immersed load switch of a ring network incoming line; the oil tank shell of the transformer is formed by sealing and welding thick steel plates; the number of the cable sleeve bases is 3-6; the number of the oil-immersed load switches for incoming wires of the ring network is 1-3 respectively.

Due to the adoption of the technical scheme, compared with the prior art, the utility model has the technical effects that: the structure of the utility model integrates the cable distribution box and the transformer into a buried combined transformer which can be distributed with a high-voltage network, the equipment factory is prefabricated, the construction cost is saved, the buried combined transformer can be installed in a buried way, and simultaneously, the buried combined transformer has the advantages of beautifying and coordinating the environment.

Drawings

Fig. 1 is a top view of an underground combined transformer structure with high-voltage ring network tapping according to the present invention;

fig. 2 is a left side view of an underground combined transformer structure with high-voltage ring network tapping according to the present invention;

fig. 3 is a front view of an underground combined transformer structure with high-voltage ring network tapping of the utility model;

fig. 4 is an electrical connection diagram of an underground combined transformer structure with high-voltage ring network tapping according to the utility model.

The reference numbers illustrate: 1. the transformer comprises an oil tank shell, 2 plug-in fuses, 3 oil-immersed load switches of the transformer, 4 transformer cores and coils, 5 high-voltage cable sleeve bases, 6 high-voltage cable heads, 7 high-voltage operation sealing bins, 8 low-voltage wiring sealing bins, 9 oil-immersed load switches for incoming wires of a ring network and 10 oil-immersed load switches for outgoing wires of the ring network.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in fig. 1, 2, 3, and 4, the underground combined transformer structure with high-voltage ring network tapping of the present invention includes an oil tank housing 1, a plug-in fuse 2, an oil-immersed load switch 3 of a transformer, a transformer core and coil 4, a high-voltage cable bushing base 5, a high-voltage cable head 6, a high-voltage operation sealed cabin 7, a low-voltage wiring sealed cabin 8, an oil-immersed load switch 9 for incoming wires of a ring network, and an oil-immersed load switch 10 for outgoing wires of the ring network, and is characterized in that the oil tank housing 1 is respectively provided with the high-voltage cable bushing base 5, the plug-in fuse 2, the oil-immersed load switch 3 of the transformer, the oil-immersed load switch 9 for incoming wires of the ring network, and the oil-immersed load switch 10 for outgoing wires of the ring network, and the oil tank housing 1 is further provided with the low-voltage wiring sealed cabin 8 and the high-voltage operation sealed cabin 7; the high-voltage incoming wire of the high-voltage ring network of the power grid is led in from a high-voltage cable bushing base 5 and is connected with an end A of an oil-immersed load switch 9 of the incoming wire of the ring network, an end B of the high-voltage incoming wire of the high-voltage ring network is connected with an end B of an oil-immersed load switch 10 of the outgoing wire of the ring network and an end B of an oil-immersed load switch 3 of the transformer to form a common point, the outgoing wire of the oil-immersed load switch 10 of the ring network is led out to a ring network circuit to form ring network tapping, the end A of the oil-immersed load switch 3 of the transformer is connected with an end A of an incoming wire end of a plug-in fuse 2, the end B of the outgoing wire end of the plug-in fuse 2 is connected with a high-voltage contact of a transformer core and a coil 4, the plug-in fuse 2 is used as short-circuit and overload protection of a combined transformer, the operation and exit of the transformer are realized through the switching operation of the oil-immersed load switch 3 of the ring network, and the ring network are connected through the outgoing wire, The on-off operation of an oil-immersed load switch 9 of the looped network incoming line realizes the on-off of a high-voltage looped network line; the oil tank shell 1 of the transformer is formed by sealing and welding thick steel plates, and is subjected to overall hot dip galvanizing treatment after welding, or is formed by fully sealing and welding 304 and 316 stainless steel plates, so that the durable corrosion resistance of coastal outdoor installation and underground installation is ensured; the number of the cable sleeve bases 5 is 3-6, the European or American type sleeve specification can be adopted, and a charged display interface can be configured; the number of the oil-immersed load switches 9 for incoming lines of the ring network and the number of the oil-immersed load switches 10 for outgoing lines of the ring network are respectively 1-3. The oil-immersed high-voltage load switch arranged in the oil tank shell can be provided with a 2-station or 4-station transformer outgoing line oil-immersed load switch, so that the functions of a terminal type or ring network type combined transformer can be realized; when a 4-station or 3-2-station oil-immersed high-voltage load switch or an oil-immersed load switch of a transformer outgoing line, an oil-immersed load switch of a ring network incoming line and an oil-immersed load switch of a ring network outgoing line are installed, the function of a ring network type combined transformer can be realized, an inserted fuse is installed in an oil tank shell, overload and short-circuit protection of the transformer can be realized, a high-voltage operation sealing cabin and a low-voltage wiring sealing cabin are arranged on the oil tank shell, the sealing cabins are all in IP68 protection grades, and a cable inlet and a cable outlet are plugged by adopting sealing clay and pouring glue. According to the utility model, 1-2 high-voltage oil-immersed load switches are additionally arranged on the basis of the buried combined transformer, so that the wiring requirement of the combined transformer for realizing tapping with a high-voltage network can be met, the convenience of simplified connection and operation and maintenance of a high-voltage line is realized, and the buried combined transformer is suitable for being designed and applied in long-distance power supply schemes such as a pipe gallery, a high speed bridge and the like.

The above description is only a preferred embodiment of the present invention, but the present invention is not limited to the described embodiments, and the undisclosed technology is known technology, and it should be understood that all the assembling and connecting manners made according to the scope of the present invention should fall within the scope of the present invention for those skilled in the art.

Claims

1. A combined transformer structure with ring network tapping comprises an oil tank shell (1), a plug-in fuse (2), an oil-immersed load switch (3) of a transformer, a transformer iron core and coil (4), a high-voltage cable sleeve base (5), a high-voltage cable head (6), a high-voltage operation sealed cabin (7), a low-voltage wiring sealed cabin (8), an oil-immersed load switch (9) for ring network incoming wire, an oil-immersed load switch (10) for ring network outgoing wire, it is characterized in that a high-voltage cable sleeve base (5), a plug-in fuse (2), an oil-immersed load switch (3) of a transformer, an oil-immersed load switch (9) of a looped network incoming line and an oil-immersed load switch (10) of a looped network outgoing line are respectively arranged on an oil tank shell (1), the oil tank shell (1) is also provided with a low-voltage wiring sealed cabin (8) and a high-voltage operation sealed cabin (7).

2. The combined transformer structure with ring network tapping according to claim 1, characterized in that the high voltage incoming line of the high voltage ring network of the power grid is connected with the end A of the oil-immersed load switch (9) of the incoming line of the ring network from the high voltage cable bushing base (5), the end B is connected with the end B of the oil-immersed load switch (10) of the outgoing line of the ring network and the end B of the oil-immersed load switch (3) of the transformer to form a common point, the outgoing line from the end A of the oil-immersed load switch (10) of the outgoing line of the ring network is connected to the ring network line to form ring network tapping, the end A of the oil-immersed load switch (3) of the transformer is connected with the end A of the incoming line of the plug-in fuse (2), the end B of the outgoing line of the plug-in fuse (2) is connected to the high voltage contact of the transformer core and the coil (4), and the short circuit and overload protection of the combined transformer is performed through the plug-in fuse (2), the operation and the exit of the transformer are realized through the on-off operation of an oil-immersed load switch (3) of the transformer, and the connection and the disconnection of a high-voltage ring network line are realized through the on-off operation of an oil-immersed load switch (10) of a ring network outgoing line and an oil-immersed load switch (9) of a ring network incoming line.

3. The combined transformer structure with the looped network tapping as claimed in claim 1, wherein the oil tank shell (1) of the transformer is formed by sealing and welding thick steel plates.

4. The combined transformer structure with the looped network tapping according to claim 1, wherein the number of the cable sleeve bases (5) is 3-6.

5. The combined transformer structure with the ring network tapping according to claim 1, wherein the number of the oil-immersed load switches (9) for ring network incoming lines and the number of the oil-immersed load switches (10) for ring network outgoing lines are respectively 1-3.