CN209448225U - A kind of buried substation - Google Patents

Abstract

This application provides a kind of buried substations.The buried substation includes overground system and underground system, and the underground system is arranged in underground, and the underground system includes cable；The overground system includes cable butt connecting box, and the cable connection end of the cable of the underground system passes through the ground and protrudes into the overground system and be arranged in the cable butt connecting box.The buried substation of the application uses cable butt connecting box inner cable docking mode.Underground system closing, solves existing buried change buried cable hole waterproof problem.With high intensity, high anti-permeability avoids water inlet in underground box from causing equipment fault, and buried change is whole can long-term soaked operation.In addition, under ground portion occupied area reduces 3/4 since box house is not necessarily to reserved cable bend space.

Description

Buried transformer substation

Technical Field

The application belongs to the technical field of transformer substations, and particularly relates to a buried transformer substation.

Background

With the gradual improvement of the requirements on limited land utilization and city beautification, a novel distribution equipment, namely a fully-buried preassembled box type transformer substation, which is called as fully-buried transformer for short, is developed. The full-underground transformer adopts an integrally-underground structure, all electrical equipment such as high-voltage and low-voltage switch equipment, a transformer and the like are arranged underground, and a manhole and a vent hole are arranged on the overground part.

The fully buried transformer occupies small space on the ground, is mainly applied to places such as urban greenbelts, streets and the like, solves the problems that the conventional outdoor power distribution equipment occupies large space, influences the attractiveness of the surrounding environment, is easily influenced by solar radiation, has environmental noise and the like, and is gradually applied to the field of power distribution.

The existing all-underground buried transformer generally adopts an integral prefabricated form, and the bending radius of a cable is required to be considered and the cable operation space is reserved in a box body except for high-voltage, transformer and low-voltage distribution equipment, so that the equipment field excavation area is large, and urban underground pipelines are dense, and the all-underground buried site selection is difficult. The existing fully buried cable inlet and outlet cables generally adopt an underground connection mode, and an underground box body needs to be provided with cable holes and is used for plugging the cables. The existing cable plugging technology can not completely avoid water seepage of a cable well, and water enters the box body to bring safety risk to equipment operation.

Accordingly, a technical solution is desired to overcome or at least alleviate at least one of the above-mentioned drawbacks of the prior art.

Disclosure of Invention

The utility model aims at providing a buried substation to solve at least one problem that current buried substation exists.

The technical scheme of the application is as follows:

a buried substation comprises an aboveground system and an underground system, wherein the underground system is arranged underground and comprises a cable; the above-ground system comprises a cable butt-joint box, and the cable connecting end of the cable of the underground system penetrates through the ground to extend into the above-ground system and is arranged in the cable butt-joint box.

Optionally, the underground system comprises: the underground box body is arranged underground and is provided with an opening; the top cover is used for covering the opening and is provided with a cable channel, and the cable connecting end of the cable group extends into the cable butt-joint box through the cable channel; wherein the cable butt-joint box is arranged on the top cover.

Optionally, a manhole is arranged on the top cover, and the manhole is communicated with the inside of the underground box body; the underground system further comprises: the manhole cover covers the manhole.

Optionally, the cable docking box includes a peripheral side wall and a top plate, and the peripheral side wall and the top plate surround to form a cable docking box cavity.

Optionally, the peripheral side walls include an inner layer wall, a middle layer wall connected to the inner layer wall, and an outer layer wall connected to the middle layer wall.

Optionally, the inner wall is a cold-rolled steel plate, the middle wall is an insulating plate, and the outer wall is a cold-rolled steel plate.

Optionally, the cable junction box further comprises a partition plate, wherein the partition plate divides the cable junction box cavity into a high-pressure cavity and a low-pressure cavity; the cable group comprises a high-voltage cable and a low-voltage cable, and the cable connecting end of the high-voltage cable is arranged in the high-voltage cavity; the cable connection end of the low-voltage cable is arranged in the low-voltage cavity.

Optionally, the cable butt-joint box further comprises a low-voltage bus-bar clamp, the low-voltage bus-bar clamp is arranged in the low-voltage cavity, and the cable connecting end of the low-voltage cable is arranged on the low-voltage bus-bar clamp.

Optionally, the low voltage bus bar clamp comprises: the mounting shell comprises a mounting shell peripheral side plate and a mounting shell bottom plate which are connected with each other, a plurality of first through holes and a plurality of second through holes are formed in the mounting shell peripheral side plate, and a group of through hole groups are formed by one first through hole and one second through hole; a bus bar clamp cover plate that covers the mounting housing; the bus clamp cover plate and the mounting shell are encircled to form an accommodating space; the connecting copper sheets are arranged in the accommodating space, one end of each connecting copper sheet extends out of the accommodating space from a first through hole in one through hole group, and the other end of each connecting copper sheet extends out of the accommodating space from a second through hole in the reorganized through hole group; and the cable connecting end of the low-voltage cable is arranged at one end of the connecting copper sheet extending out of the first through hole and/or one end of the connecting copper sheet extending out of the second through hole.

Optionally, the buried substation further comprises a ventilation box, the ventilation box and the cable butt-joint box are integrally formed, and the ventilation box is communicated with the underground box body.

The application has at least the following beneficial technical effects:

the buried transformer substation adopts a cable butt joint mode in the cable butt joint box. The underground system is closed, and the problem of water prevention of the existing underground buried transformer underground cable hole is solved. The underground water-saving device has high strength and high permeability resistance, avoids equipment failure caused by water inflow in the underground box, and can be used for long-term water soaking operation of the underground variable integral body. In addition, because the inside of the box body does not need to reserve a cable bending space, the occupied area of the underground part is reduced 3/4.

Drawings

Fig. 1 is a schematic structural diagram of an underground substation in an embodiment of the present application.

Fig. 2 is a schematic structural view of a cable junction box and a ventilation booth of the buried substation shown in fig. 1.

Fig. 3 is another structural schematic diagram of the cable junction box and the ventilation kiosk of the buried substation shown in fig. 2.

Fig. 4 is another structural schematic diagram of the cable junction box and the ventilation kiosk of the buried substation shown in fig. 2.

Fig. 5 is an enlarged view of a portion of the ventilation kiosk shown in fig. 2.

Fig. 6 is a schematic structural view of the ventilation kiosk shown in fig. 2.

Fig. 7 is another schematic structural view of the buried substation shown in fig. 1.

Fig. 8 is a schematic view of the low voltage bus bar clamp in the buried substation shown in fig. 1.

Reference numerals

1-a cable butt box; 2-a cable; 3-underground box body; 4-a top cover; 5-man well cover; 6-ventilation kiosk; 7-cover plate; 61-a first box; 62-a second box; 611-a first box side panel; 621-a second case side plate; 63-air inlet; 64-air outlet; 65-group of ventilation holes; 66-an air intake baffle assembly; 612-a first baffle; 8-low voltage bus bar clamp; 81-mounting the housing; 82-bus-clamp cover plate; 83-connecting the copper sheets.

Detailed Description

In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are a subset of the embodiments in the present application and not all embodiments in the present application. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. Embodiments of the present application will be described in detail below with reference to the accompanying drawings.

In the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present application and for simplifying the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be construed as limiting the scope of the present application.

The aircraft of the present application is described in further detail below with reference to the various figures.

Fig. 1 is a schematic structural diagram of an underground substation in an embodiment of the present application. Fig. 2 is a schematic structural view of a cable junction box and a ventilation booth of the buried substation shown in fig. 1. Fig. 3 is another structural schematic diagram of the cable junction box and the ventilation kiosk of the buried substation shown in fig. 2. Fig. 4 is another structural schematic diagram of the cable junction box and the ventilation kiosk of the buried substation shown in fig. 2. Fig. 5 is an enlarged view of a portion of the ventilation kiosk shown in fig. 2. Fig. 6 is a schematic structural view of the ventilation kiosk shown in fig. 2. Fig. 7 is another schematic structural view of the buried substation shown in fig. 1. Fig. 8 is a schematic view of the low voltage bus bar clamp in the buried substation shown in fig. 1.

The buried substation shown in fig. 1 to 7 includes an above-ground system disposed underground, and an underground system including a cable 2; the ground system comprises a cable butt box 1, and the cable connecting end of a cable 2 of the underground system penetrates through the ground to extend into the ground system and is arranged in the cable butt box 1.

The buried transformer substation adopts a cable butt joint mode in the cable butt joint box. The underground system is closed, and the problem of water prevention of the existing underground buried transformer underground cable hole is solved. The underground water-saving device has high strength and high permeability resistance, avoids equipment failure caused by water inflow in the underground box, and can be used for long-term water soaking operation of the underground variable integral body. In addition, because the inside of the box body does not need to reserve a cable bending space, the occupied area of the underground part is reduced 3/4.

Referring to fig. 1 and 7, in the present embodiment, the underground system includes an underground box 3 and a top cover 4, the underground box 3 is disposed underground, and the underground box 3 has an opening; the top cover 4 covers the opening, a cable channel is arranged on the top cover 4, and a cable connecting end of the cable 2 extends into the cable butt-joint box through the cable channel; wherein the cable 2 butt box is arranged on the top cover 4.

Referring to fig. 7, in the present embodiment, a manhole is provided on the top cover 4, and the manhole communicates with the inside of the underground tank; the underground system further comprises a manhole cover 5, which manhole cover 5 covers the manhole. In this embodiment, people's well lid and manhole can be dismantled and be connected, and when the user need get into underground system through the manhole, open people's well lid can. Through setting up people's well lid, can prevent that the dust from getting into.

Referring to fig. 1-7, in the present embodiment, the above-ground system further includes a ventilation kiosk 6, the ventilation kiosk 6 being disposed on the roof 4. In this embodiment, the inside of the ventilation booth is communicated with the underground system through the top cover, and the ventilation booth can introduce external natural wind into the underground system, so that the whole ventilation is performed, and a circulating ventilation system is formed.

In this embodiment, ventilation pavilion and cable butt joint case integrated into one piece, ventilation pavilion and underground box intercommunication.

Specifically, a top cover first through hole and a top cover second through hole which are communicated with the underground box body 3 are formed in the top cover 4;

the ventilation booth comprises a ventilation box body and a cover plate 7, the ventilation box body comprises a bottom plate group and a side plate group, the bottom plate group and the side plate group form a cavity, an air inlet 63, an air outlet 64 and a ventilation hole group 65 are arranged on the bottom plate group, the air inlet 63 is respectively communicated with a first through hole and the cavity, and the air outlet 64 is respectively communicated with a second through hole and the cavity; the vent hole group 65 is communicated with the cavity; the cover plate 7 is detachably connected with the ventilation box body, and the cover plate 7 is used for sealing the cavity.

In this embodiment, the surface of the cover plate 7 of the ventilation booth, which is away from the cavity, is an inclined surface. By adopting the structure, water accumulation during raining can be prevented.

In an alternative embodiment, the whole ventilation kiosk is made with an inclination in the portion connected to the cover plate.

Referring to fig. 2 to 6, in the present embodiment, the ventilation booth 6 includes a first case 61 and a second case 62; the first case 61 includes a first case side plate 611 and a first case bottom plate; the second case 62 includes a second case side plate 621 and a second case bottom plate; the first case side plate 611 and the second case side plate 621 constitute a side plate group; the first box body bottom plate and the second box body bottom plate form a bottom plate group; the ventilation hole group 65 is provided on the first case 61 and on the second case 62; the air inlet 63 is arranged on the first box body 61; the outlet 64 is provided on the second case 62.

Referring to fig. 7, in the present embodiment, the cable junction box 1 is provided integrally with the ventilation booth 6.

In this embodiment, the top cover 4 is provided with a first platform for placing the cable docking box and the ventilation kiosk.

Referring to fig. 6, in the present embodiment, the ventilation booth further includes an air inlet baffle assembly 66 and an air outlet baffle assembly, the air inlet baffle assembly 66 is disposed in the cavity and on the air inlet 63; the air outlet baffle assembly is disposed within the cavity and over the air outlet 64. Specifically, the air inlet 63 is enclosed by the air inlet baffle assembly, and the air outlet 64 is enclosed by the air outlet baffle assembly.

Referring to fig. 6, in the present embodiment, the vent hole group provided in the first case is provided on the side of the first case side plate close to the first case bottom plate;

the direction in which any point on the surface of the first box bottom plate opposite to the cover plate extends towards the cover plate is called as a first direction;

the air inlet baffle assembly at least comprises an air inlet baffle, and the size of the air inlet baffle in the first direction is larger than the size of a ventilation hole group arranged on the side plate of the first box body in the first direction;

the ventilation hole group arranged on the second box body is arranged on one side of the second box body side plate close to the second box body bottom plate;

the air outlet baffle assembly at least comprises an air outlet baffle, and the size of the air outlet baffle in the first direction is larger than the size of the ventilation hole group arranged on the side plate of the second box body in the first direction.

By adopting the mode, rainwater can be prevented from entering the air inlet or the air outlet after entering the cavity from the ventilation hole group.

Referring to fig. 6, in the present embodiment, the first direction refers to an up-down direction in fig. 6.

In this embodiment, the set of ventilation holes is arranged in a row and column, i.e., in a plurality of rows and columns. The size of the air outlet baffle plate in the first direction is larger than that of the air outlet baffle plate arranged on the second box body, and the size of the air outlet baffle plate in the first direction, which is arranged on the side plate, refers to the size of the air outlet baffle plate in the case that the air outlet baffle plate is regarded as a whole.

Referring to fig. 5, in the present embodiment, the first box 61 further includes a first baffle 612, and the first baffle is connected to the first side plate provided with the ventilation hole group;

the second box further comprises a second guide plate, and the second guide plate is connected with a second side plate provided with the ventilation hole group. Set up the guide plate, can derive the rainwater that flows from the apron.

In this embodiment, the underground part of the underground box 3 is a box transformer main body, and the inside of the box transformer main body is arranged in a grid shape and mainly comprises a high-pressure chamber, a low-pressure chamber and a transformer chamber. And the side surface is provided with a cable interlayer. The underground floor area is 5.95, which is one third larger than the traditional buried floor area; the underground is provided with a drainage pump which can automatically drain water and can manually drain water.

The low-voltage switch comprises a low-voltage chamber and a transformer chamber, wherein heat insulation cotton is added in the low-voltage chamber and the transformer chamber, and the low-voltage switch is prevented from being failed due to the fact that heat of the transformer chamber is transmitted to the low-voltage chamber. The low-voltage chamber adopts a double-layer design, so that the arcing danger of the transformer chamber is weakened.

In this embodiment, the cable docking box includes a peripheral side wall and a top plate, and the peripheral side wall and the top plate surround to form a cable docking box cavity.

The peripheral side wall comprises an inner layer wall, a middle layer wall connected with the inner layer wall and an outer layer wall connected with the middle layer wall. With this structure, it is possible to prevent the influence of high-pressure arcing from being generated.

In this embodiment, the inner wall is a cold-rolled steel plate, the middle wall is an insulating plate, and the outer wall is a cold-rolled steel plate.

It will be appreciated that the top plate may also be provided in 3 layers, using the same number of layers and materials as the peripheral side walls, as desired.

Referring to fig. 2 and 8, in the present embodiment, the cable junction box further includes a partition plate, and the partition plate divides the cavity of the cable junction box into a high-pressure cavity and a low-pressure cavity; the cable group 2 comprises a high-voltage cable and a low-voltage cable, and the cable connecting end of the high-voltage cable is arranged in the high-voltage cavity; the cable connection end of the low-voltage cable is arranged in the low-voltage cavity.

Referring to fig. 8, in this embodiment, the cable junction box further includes a low voltage bus bar clamp 8, the low voltage bus bar clamp 8 is disposed in the low voltage cavity, and the cable connection end of the low voltage cable is disposed on the low voltage bus bar clamp 8.

In this embodiment, the low-voltage bus-bar clamp 8 comprises a mounting housing 81, a bus-bar clamp cover plate 82 and a connecting copper sheet 83, the mounting housing comprises a mounting housing peripheral side plate and a mounting housing bottom plate which are connected with each other, a plurality of first through holes and a plurality of second through holes are arranged on the mounting housing peripheral side plate, and a group of through hole groups is formed by one first through hole and one second through hole; the bus clamp cover plate is covered with the mounting shell; the bus clamp cover plate and the mounting shell are encircled to form an accommodating space; the number of the connecting copper sheets is multiple, each connecting copper sheet is arranged in the accommodating space, one end of each connecting copper sheet extends out of the accommodating space from a first through hole in one group of through hole groups, and the other end of each connecting copper sheet extends out of the accommodating space from a second through hole in the reorganized through hole group; the cable connecting end of the low-voltage cable is arranged at one end of the connecting copper sheet extending out of the first through hole and/or one end of the connecting copper sheet extending out of the second through hole.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. An underground substation, characterized in that it comprises an aboveground system and an underground system, the underground system being arranged underground, the underground system comprising a set of cables (2); the above-ground system comprises a cable butt box (1), and the cable connecting end of a cable group (2) of the underground system penetrates through the ground to extend into the above-ground system and is arranged in the cable butt box (1).

2. The buried substation of claim 1, wherein the underground system comprises:

the underground box body (3), the underground box body (3) is arranged underground, and the underground box body (3) is provided with an opening;

the top cover (4) is used for covering the opening, a cable channel is arranged on the top cover (4), and a cable connecting end of the cable group (2) extends into the cable butt-joint box through the cable channel; wherein,

the cable butt-joint box (1) is arranged on the top cover (4).

3. The buried substation according to claim 2, characterized in that the top cover (4) is provided with a manhole which is communicated with the inside of the underground box body;

the underground system further comprises:

the manhole cover (5), manhole cover (5) closing cap the manhole.

4. A buried substation according to claim 2, wherein the cable butt-box includes a peripheral side wall and a roof, the peripheral side wall and the roof enclosing a cable butt-box cavity.

5. A buried substation according to claim 4, wherein the peripheral side walls include an inner wall, a middle wall connected to the inner wall and an outer wall connected to the middle wall.

6. A buried substation according to claim 5, wherein the inner wall is cold rolled steel, the intermediate wall is an insulating plate and the outer wall is cold rolled steel.

7. The buried substation of claim 4, wherein the cable breakout box further comprises a partition that divides the cable breakout box cavity into a high-pressure chamber and a low-pressure chamber;

the cable group (2) comprises a high-voltage cable and a low-voltage cable, and the cable connecting end of the high-voltage cable is arranged in the high-voltage cavity;

the cable connection end of the low-voltage cable is arranged in the low-voltage cavity.

8. The buried substation of claim 7, wherein the cable butt box further comprises a low voltage bus bar clamp disposed within the low voltage cavity, the cable connection end of the low voltage cable being disposed on the low voltage bus bar clamp.

9. A buried substation according to claim 8, characterized in that the low voltage bus-bar clamp (8) comprises:

the mounting shell (81) comprises a mounting shell peripheral side plate and a mounting shell bottom plate which are connected with each other, a plurality of first through holes and a plurality of second through holes are formed in the mounting shell peripheral side plate, and a group of through hole groups are formed by one first through hole and one second through hole;

a bus bar clamp cover plate (82) that covers the mounting housing; the bus clamp cover plate and the mounting shell are encircled to form an accommodating space;

the connecting copper sheets (83) are multiple in number and arranged in the accommodating space, one end of each connecting copper sheet extends out of the accommodating space from a first through hole in one through hole group, and the other end of each connecting copper sheet extends out of the accommodating space from a second through hole in the reorganized through hole group;

and the cable connecting end of the low-voltage cable is arranged at one end of the connecting copper sheet extending out of the first through hole and/or one end of the connecting copper sheet extending out of the second through hole.

10. A buried substation according to claim 2, further comprising a ventilation kiosk (6), the ventilation kiosk (6) being integrally formed with the cable docking box, the ventilation kiosk (6) being in communication with the underground box.