CN111834948B

CN111834948B - Buried box-type substation

Info

Publication number: CN111834948B
Application number: CN202010726662.2A
Authority: CN
Inventors: 弥富军; 潘小龙
Original assignee: Shaanxi Bowei Industrial Co ltd
Current assignee: Shaanxi Bowei Industrial Co ltd
Priority date: 2020-07-25
Filing date: 2020-07-25
Publication date: 2022-03-15
Anticipated expiration: 2040-07-25
Also published as: CN111834948A

Abstract

The utility model relates to a bury formula box-type substation relates to transformer substation technical field, aims at improving the inconvenient problem of bury formula box-type substation in rainfall weather maintenance among the correlation technique, and it includes outer box, be provided with the manhole on the outer box roof, be provided with sealing door on the manhole, in it is equipped with the protruding well to enclose on the outer box of manhole week side, be provided with the pressure-bearing well lid on the protruding well, the pressure-bearing well lid includes bearing plate and weather shield, bearing plate one side with the protruding well is articulated, the opposite side with the weather shield is articulated, just the bearing plate lid fits when on the protruding well, the weather shield set up in between bearing plate and the protruding well, in be provided with first drain pipe on the outer box between protruding well and the manhole, the delivery port of first drain pipe is connected with drainage assembly. This application has the effect of being convenient for carry out the maintenance to burying formula box-type substation in rainfall weather.

Description

Buried box-type substation

Technical Field

The application relates to the technical field of transformer substations, in particular to a buried box type transformer substation.

Background

The box-type transformer substation reduces 10KV input voltage to 400V/220V distribution voltage through a transformer and then distributes the distribution voltage to a transformer substation using a load point, can be used for a ring network distribution system, and can also be used as a radial power grid terminal for power supply. The buried box-type substation is a power transformation device which is characterized in that all complete equipment of the box-type substation is arranged in a fully-sealed outer box body, the outer box body is integrally arranged below a ground level, the ground above the substation can be used by the buried box-type substation, and the land utilization rate can be effectively improved.

Referring to fig. 1, a typical buried pre-installed box type substation, which includes an outer box 1 buried underground and a high voltage power transformation device 11 disposed in the inner cavity of the outer box 1, the outer box side wall is provided with a plurality of cable sealing sleeves 12, the top wall of the outer box is provided with a device access door 13, an access door 14 and a waterproof vent 15, wherein the access door 14 and the waterproof vent 15 are both disposed above the earth surface, and a ladder 16 is disposed in the inner cavity of the outer box 1 corresponding to the access door 14. During installation, the outer box body 1 is embedded underground, then the high-voltage power transformation equipment 11 is hung into the inner cavity of the outer box body 1 through the equipment access door 13, the high-voltage cable and the low voltage are inserted into the inner cavity of the outer box body 1 through the cable sealing sleeve 12 and are connected with the high-voltage power transformation equipment 11, then the equipment access door 13 is sealed, the embedded foundation pit of the outer box body 1 is backfilled, and the installation of the fully-embedded prefabricated box type transformer substation is completed until only the waterproof air vent 15 and the access door 14 leak out of the ground.

To the correlation technique among the above-mentioned, when the high voltage substation equipment in the rainfall weather outer box broke down, when the maintainer opened the access door, rainwater and surface ponding can flow into outer box inside through the access hole, had the inconvenient defect of stormy weather maintenance promptly.

Disclosure of Invention

In order to improve the inconvenient problem of formula box-type substation that buries before improving in rainfall weather maintenance, this application provides a formula box-type substation buries.

The application provides a bury formula box-type substation adopts following technical scheme:

the utility model provides a bury formula box-type substation, includes outer box, be provided with the manhole on the outer box roof, be provided with sealing door on the manhole, in it is equipped with the protruding well to enclose on the outer box of manhole week side, be provided with the pressure-bearing well lid on the protruding well, the pressure-bearing well lid includes bearing plate and weather shield, bearing plate one side with the protruding well is articulated, the opposite side with the weather shield is articulated, just the bearing plate lid fits when on the protruding well, the weather shield set up in between bearing plate and the protruding well, in be provided with first drain pipe on the outer box between protruding well and the manhole, the delivery port of first drain pipe is connected with drainage assembly.

By adopting the technical scheme, when the underground box-type substation needs to be maintained in rainy weather, the pressure-bearing well cover is opened, namely the pressure-bearing plate is firstly rotated to open the pressure-bearing plate, then the rain baffle plate is rotated to rotate to the horizontal position to shield the upper part of the maintenance well, then the sealing door is opened, an maintainer enters the inner cavity of the outer box body through the maintenance well, the sealing door is covered in the outer box body, maintenance operation is carried out in the outer box body, and after the pressure-bearing well cover is opened, surface water flowing between the maintenance well and the protruding well or rainwater falling between the maintenance well and the protruding well flows into the drainage assembly through the first drainage pipe to be collected and drained; the designed pressure-bearing well lid is matched with the rain baffle through the pressure-bearing plate, so that rainwater is shielded, and the possibility that the rainwater falls into the inner cavity of the outer box body through the maintenance well when the sealing cover is opened is reduced; the designed inspection well and the convex well are matched with the outer box body, a temporary storage water tank is formed between the inspection well and the convex well, surface accumulated water flowing into the space between the inspection well and the convex well or rainwater falling into the space between the inspection well and the convex well is collected and converged, and the accumulated water and the rainwater are prevented from directly flowing into the inspection well after flowing into the convex well; the designed drain pipe and the drain assembly are convenient for draining accumulated water gathered between the manhole and the convex well in time; through protruding well, pressure-bearing well lid, drain pipe and drainage subassembly's common cooperation, reduce rainwater and surface gathered water and flow into the inside possibility of outer box through the manhole, be convenient for maintain buried box-type substation in rainfall weather.

Preferably, the drainage subassembly include fixed connection in storage water tank on the outer box and set up in water pump and level gauge in the storage water tank, the delivery port and the storage water tank inner chamber intercommunication of first drain pipe, the level gauge with the water pump electricity is connected, the delivery port of water pump with the outlet pipe intercommunication of storage water tank, the outlet pipe and the municipal rainwater pipe network intercommunication of storage water tank, and install the check valve on the outlet pipe of storage water tank.

By adopting the technical scheme, accumulated water gathered between the manhole and the convex well flows into the water storage tank through the first drain pipe, the liquid level meter monitors the liquid level in the water storage tank, and when the liquid level in the water storage tank reaches the set water level of the liquid level meter, the water pump is started to pump rainwater in the water storage tank into the municipal pipe network; the designed water storage tank, the water pump and the liquid level meter are matched with the drain pipe, accumulated water gathered between the inspection well and the convex well is timely discharged, the possibility that the accumulated water between the inspection well and the convex well is too high to submerge the inspection well is reduced, and the safety of an inspector is ensured; the first check valve of design prevents that rivers from flowing backward, guarantees drainage component normal use.

Preferably, be provided with at least a set of locating component on the weather shield, locating component includes first connecting rod and second connecting rod, first connecting rod one end is articulated with the weather shield, the other end with the second connecting rod passes through the bolt and articulates, the second connecting rod is kept away from first connecting rod one end and is articulated with the bearing plate, just the articulated shaft of first connecting rod and second connecting rod all with the articulated shaft of weather shield and bearing plate is parallel.

Through adopting above-mentioned technical scheme, the locating component of design carries out the auxiliary stay to the weather shield for the weather shield can be in fixed position after strutting, reduces the weather shield and receives the rainwater impact and the possibility that takes place the position change, guarantees that the weather shield can normal use, ensures that the weather shield can continuously shelter from the rainwater.

Preferably, the side wall of the rain baffle is provided with accommodating cavities, and the accommodating cavities are connected with auxiliary baffle plates in a sliding manner.

Through adopting above-mentioned technical scheme, the auxiliary baffle of design cooperates with the weather shield, shelters from the rainwater, has increased the area of keeping off the rain, has reduced the possibility that the rainwater falls into in the protruding well, has strengthened the effect of keeping off the rain, simple and practical.

Preferably, be provided with flexible pipe on the outer box between manhole and the protruding well and carry out the telescopic machanism that supports to the flexible pipe after the extension, flexible pipe cover is located on the protruding well, just flexible pipe one end with outer box body coupling, the other end with telescopic machanism connects, the water inlet of first drain pipe set up in on the outer box between flexible pipe and the protruding well.

By adopting the technical scheme, when the water level of local surface accumulated water is higher and exceeds the height of the convex well, after a maintenance worker opens the convex well, the accumulated water flows into the convex well, the maintenance worker regulates the extension of the telescopic pipe to enable the top opening height of the telescopic pipe to be higher than the height of the surface accumulated water, the accumulated water flowing into the convex well is blocked outside the telescopic pipe, the telescopic mechanism is driven to extend while the telescopic pipe extends, and the telescopic mechanism supports the telescopic pipe after the telescopic pipe extends to the required height; the designed extension pipe shields the maintenance well, prevents surface water rushing into the protruding well from flooding the maintenance well, ensures that maintenance personnel can smoothly enter the maintenance well, and is convenient for maintaining the buried box-type substation in rainfall weather; the telescopic mechanism of design supports flexible pipe for flexible pipe can maintain the height after the extension, ensures flexible pipe normal use.

Preferably, telescopic machanism includes a plurality of edges the even telescopic link that sets up of flexible pipe circumference direction, the telescopic link includes a plurality of sleeves that cup joint step by step, the equal vertical direction setting of sleeve axis, the sleeve is close to and is provided with the spring catch on the lateral wall of outer box one side, keeps away from outward outer box one side seted up with spring catch complex pinhole, and outmost the sleeve is close to outer box one end fixed connection in on the outer box, the inlayer the sleeve keep away from outer box one end with outer box one end fixed connection is kept away from to flexible pipe.

By adopting the technical scheme, in the process of adjusting the extension of the telescopic pipe by an overhaul worker, the telescopic pipe drives the innermost sleeve to move upwards until the spring pin of the innermost sleeve is clamped into the pin hole of the outer sleeve adjacent to the innermost sleeve, the innermost sleeve drives the outer sleeve adjacent to the innermost sleeve to move upwards together, the extending and clamping processes of the sleeves are repeated step by step until the telescopic pipe stops moving, the sleeves are clamped and fixed, and the telescopic pipe is supported; the telescopic link of design, along with flexible pipe extension, the sleeve stretches out step by inside to outside, the joint, realizes the telescopic link extension, and simple structure adjusts conveniently, can assist flexible pipe extension to needs height fast, reduces ponding and gushes into the possibility in the telescopic pipe, ensures that maintainer can get into the manhole smoothly.

Preferably, a second drain pipe is arranged on the outer box body between the telescopic pipe and the service well, the second drain pipe is communicated with the first drain pipe, and a second check valve is arranged on the second drain pipe.

Through adopting above-mentioned technical scheme, the second drain pipe of design can in time discharge the rainwater that falls into between flexible pipe and the access well at the pressure-bearing well lid in-process that opens and shuts, avoids the rainwater to gather for a long time between flexible pipe and access well, and the second check valve of design avoids the inflow in the first drain pipe to flow back between flexible pipe and the access well through the second drain pipe, ensures that the second drain pipe can normal practical.

Preferably, the water inlets of the first drainage pipe and the second drainage port are both provided with filter screens, and the filter screens are provided with blocking covers.

Through adopting above-mentioned technical scheme, the filter screen of design stops the debris in rainwater and the ponding, avoids debris to block up first drain pipe and second drain pipe, and the blanking cover of design seals first drain pipe and second drain pipe, reduces the possibility that the insect got into the storage water tank through first drain pipe and second drain pipe, protects level gauge, water pump and supporting circuit in the storage water tank.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the pressure-bearing well lid of design, cooperate through pressure-bearing plate and weather shield, shelter from the rainwater, reduce the sealed possibility that the rainwater falls into in outer box inner chamber through the manhole when opening, manhole and protruding well of design, with outer box cooperation, form the basin of keeping in between manhole and protruding well, to flowing into the earth's surface ponding between manhole and the protruding well or the rainwater that drifts down between manhole and the protruding well collect and assemble, avoid ponding and rainwater to flow into directly into the manhole behind the protruding well, the drain pipe and the drainage subassembly of design, be convenient for assemble in time the discharge of ponding between manhole and protruding well, reduce the rainwater and the ponding is through the probability that the manhole flows into outer box internal portion, be convenient for maintain the buried substation in rainfall weather.

2. The designed water storage tank, the water pump and the liquid level meter are matched with the drain pipe, accumulated water gathered between the inspection well and the convex well is timely discharged, the possibility that the accumulated water between the inspection well and the convex well is too high to submerge the inspection well is reduced, and the safety of an inspector is ensured;

3. the designed extension pipe shields the maintenance well, prevents surface water rushing into the protruding well from flooding the maintenance well, ensures that maintenance personnel can smoothly enter the maintenance well, and is convenient for maintaining the buried box-type substation in rainfall weather; the telescopic mechanism of design supports flexible pipe for flexible pipe can maintain the height after the extension, ensures flexible pipe normal use.

Drawings

Fig. 1 is a schematic structural view of a fully-buried pre-installed box-type substation of the related art.

Fig. 2 is an overall structural schematic diagram of the buried box-type substation according to the embodiment of the present application.

Fig. 3 is a schematic sectional view taken along a-a in fig. 2.

Fig. 4 is a schematic view of the exploded structure of the telescopic rod.

Fig. 5 is an enlarged schematic view of a portion B in fig. 3.

Description of reference numerals: 1. an outer case; 11. high voltage power transformation equipment; 12. a cable gland; 13. an equipment access door; 14. an access door; 15. a waterproof vent; 16. climbing a ladder; 17. a first drain pipe; 18. a second drain pipe; 181. a second check valve; 2. repairing the well; 21. a sealing door; 3. a raised well; 4. a pressure-bearing well cover; 41. a pressure bearing plate; 42. a rain shield; 421. an auxiliary baffle; 43. a positioning assembly; 431. a first link; 432. a second link; 5. a drainage assembly; 51. a water storage tank; 52. a water pump; 53. a liquid level meter; 54. a first check valve; 6. a telescopic pipe; 7. a telescopic rod; 71. a sleeve; 711. a spring pin; 712. a pin hole; 8. filtering with a screen; 81. and (7) blocking the cover.

Detailed Description

The present application is described in further detail below with reference to figures 2-5.

The embodiment of the application discloses a buried box type transformer substation. Referring to fig. 2 and 3, the buried box-type substation includes an outer case 1 buried underground and a high voltage transformation device 11 placed in an inner cavity of the outer case 1. A plurality of mounting holes are formed in the side wall of the outer box body 1, and cable sealing sleeves 12 are welded in the mounting holes. The top wall of the outer box body 1 is provided with an air vent, an equipment inlet and an equipment outlet and an access hole. An equipment access door 13 is hinged on the equipment entrance and exit. The vent is provided with a waterproof vent 15, the waterproof vent comprises an air outlet pipe welded on the top wall of the outer box body 1, and one end of the air outlet pipe extending out of the outer box body 1 is welded with a rain-proof cap. The welding has cat ladder 16 on the 1 diapire of outer box of access hole below, the access hole has access well 2 in the welding of 1 outer one side of outer box, it has sealing door 21 to articulate on access well 2, the welding has square protruding well 3 on the outer box 1 of 2 week sides of access well, protruding well 3 encloses access well 2 and establishes in the middle of, the protruding well 3 upper cover is equipped with pressure-bearing well lid 4, still be provided with flexible pipe 6 and can carry out the telescopic machanism that supports to flexible pipe 6 after the extension on the outer box 1 roof between protruding well 3 and access well 2, flexible pipe 6 passes through the flange to be fixed on outer box 1 roof, and flexible pipe 6 and the coaxial setting of access well 2.

Referring to fig. 2 and 3, the pressure-bearing well lid 4 includes a pressure-bearing plate 41 and a rain baffle plate 42, one side of the pressure-bearing plate 41 is hinged to the protruding well 3, the other side of the pressure-bearing plate 41 is hinged to the rain baffle plate 42 through a hydraulic hinge, and when the pressure-bearing plate 41 covers the protruding well 3, the rain baffle plate 42 is folded between the pressure-bearing plate 41 and the protruding well 3. A set of positioning components 43 are arranged on the side walls of the rain blocking plates 42 on the two sides of the hinge shafts of the rain blocking plates 42 and the bearing plates 41, each positioning component 43 comprises a first connecting rod 431 and a second connecting rod 432, one end of each first connecting rod 431 is hinged to the corresponding rain blocking plate 42, the other end of each first connecting rod 431 is hinged to the corresponding second connecting rod 432 through a bolt, one end, far away from the corresponding first connecting rod 431, of each second connecting rod 432 is hinged to the corresponding bearing plate 41, and the hinge shafts of the first connecting rods 431 and the second connecting rods 432 are parallel to the hinge shafts of the corresponding rain blocking plates 42 and the bearing plates 41. The rain baffle 42 is provided with a first accommodating groove corresponding to the first connecting rod 431, and the bearing plate 41 is provided with a second accommodating groove corresponding to the second connecting rod 432, so that the first connecting rod 431 and the second connecting rod 432 are placed when the bearing well lid 4 is folded.

Referring to fig. 2, in order to increase the rain shielding area of the rain shielding plate 42, accommodating cavities are formed in the side walls of the rain shielding plate 42 on both sides of the hinge shaft of the rain shielding plate 42 and the pressure bearing plate 41, and an auxiliary baffle 421 is slidably connected to the accommodating cavities.

Referring to fig. 3 and 4, telescopic machanism includes a plurality of telescopic links 7 that evenly set up along 6 circumferential direction of telescopic pipe, telescopic link 7 includes a plurality of sleeves 71 that cup joint step by step, the equal vertical direction setting of sleeve 71 axis, the inlay hole has been seted up on the lateral wall that sleeve 71 is close to outer box 1 one side, inlay in the inlay hole and be equipped with spring catch 711, spring catch 711 keeps away from outer box 1 one side and sets up with spring catch 711 complex pinhole 712, and outermost sleeve 71 is close to outer box 1 one end and welds on outer box 1 roof, the one end of outer box 1 is kept away from to innermost sleeve 71 and outer box 1 one end is kept away from with telescopic pipe 6 and outer box 1 one end bonds.

Referring to fig. 3, a first drainage port is formed in the top wall of the outer box body 1 between the protruding well 3 and the extension tube 6, a first drainage pipe 17 is welded in the first drainage port, and a water outlet of the first drainage pipe 17 is connected with a drainage assembly 5. Drainage component 5 is including integrative setting up in the storage water tank 51 of outer box 1 bottom and setting up water pump 52 and level gauge 53 in storage water tank 51, the play water end of first drain pipe 17 runs through 1 diapire of outer box and storage water tank 51 roof and stretches into in storage water tank 51, water pump 52 and level gauge 53 all communicate through the delivery port and the storage water tank 51 inner chamber of bolt fastening at first drain pipe 17, level gauge 53 and water pump 52 electric through the bolt fastening on storage water tank 51 diapire, in this embodiment, level gauge 53 is floater level gauge 53, water pump 52 is immersible pump 52. The liquid level meter 53 is connected to a water inlet pipe of the water pump 52 through a flange, the liquid level meter 53 is electrically connected with the water pump 52, a water outlet of the water pump 52 is connected to a water outlet pipe of the water storage tank 51 through a flange, one end of the water outlet pipe of the water storage tank 51, extending out of the water storage tank 51, is used for being communicated with a municipal rainwater pipe network, and the water outlet pipe of the water storage tank 51 is connected with a first check valve 54 through a flange.

Referring to fig. 3, a second water outlet is formed in the outer box 1 between the extension tube 6 and the manhole 2, a second water discharge pipe 18 is welded in the second water outlet, one end of the second water discharge pipe 18 in the outer box 1 is welded on the first water discharge pipe 17 and is communicated with the first water discharge pipe 17, and a second check valve 181 is further connected to the second water discharge pipe 18 through a flange.

Referring to fig. 5, the filter screen 8 is clamped on the water inlets of the first drainage pipe 17 and the second drainage port, and the filter screen 8 is hinged with a blocking cover 81.

The implementation principle of the buried box-type substation in the embodiment of the application is as follows: when rainfall weather needs to get into the buried box-type substation and maintains, open pressure-bearing well lid 4, rotate pressure-bearing plate 41 earlier promptly, make pressure-bearing plate 41 open, later rotate weather shield 42, weather shield 42 rotates the in-process and drives first connecting rod 431 and second connecting rod 432 and rotate, rotate to horizontal position until weather shield 42, adjust the bolt of connecting first connecting rod 431 and second connecting rod 432, with first connecting rod 431 and second connecting rod 432 locking, weather shield 42 rigidity, shelter from manhole 2 top. Then open sealing door 21, the maintainer gets into in outer box 1 inner chamber through manhole 2, from the well lid sealing door 21, carry out maintenance operation in outer box 1, and after pressure-bearing well lid 4 was opened, the surface gathered water that flows into between manhole 2 and the protruding well 3 or the rainwater that drifts down between manhole 2 and the protruding well 3 flowed into storage water tank 51 through first drain pipe 17, level gauge 53 monitors the liquid level in storage water tank 51, after the liquid level in storage water tank 51 reached the settlement water level of level gauge 53, water pump 52 opened, go into the municipal administration pipe network with rainwater pump 52 in storage water tank 51.

Local surface ponding water level is higher, when exceeding protruding well 3 height, maintenance person opens protruding well 3 backs, ponding gushes into protruding well 3, maintenance person is to flexible pipe 6 application of force, make flexible pipe 6 extension, until flexible pipe 6 open-top height is higher than the surface ponding height, ponding that will gush into in protruding well 3 blocks outside flexible pipe 6, when flexible pipe 6 extension, drive the extension of telescopic link 7, the in-process of telescopic link 7 extension, the pinhole 712 of locating pin on the sleeve 71 and adjacent sleeve 71 joint one by one, telescopic link 7 successive layer is fixed, after flexible pipe 6 extension to needs height, support flexible pipe 6.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a bury formula box-type substation, includes outer box (1), its characterized in that: an access well (2) is arranged on the top wall of the outer box body (1), a sealing door (21) is arranged on the access well (2), a convex well (3) is arranged on the outer box body (1) at the peripheral side of the access well (2), the convex well (3) is provided with a pressure-bearing well cover (4), the pressure-bearing well cover (4) comprises a pressure-bearing plate (41) and a rain baffle plate (42), one side of the pressure bearing plate (41) is hinged with the convex well (3), the other side is hinged with the rain baffle plate (42), when the bearing plate (41) covers the protruding well (3), the rain baffle plate (42) is arranged between the bearing plate (41) and the protruding well (3), the outer box body (1) between the protruding well (3) and the maintenance well (2) is provided with a first drainage pipe (17), a water outlet of the first drainage pipe (17) is connected with a drainage component (5);

in be provided with flexible pipe (6) on outer box (1) between manhole (2) and protruding well (3) and can carry out the telescopic machanism that supports to flexible pipe (6) after the extension, flexible pipe (6) cover is located on protruding well (3), just flexible pipe (6) one end with outer box (1) is connected, the other end with telescopic machanism connects, the water inlet of first drain pipe (17) set up in on outer box (1) between flexible pipe (6) and protruding well (3).

2. A buried box substation according to claim 1, characterized in that: drainage subassembly (5) including fixed connection in storage water tank (51) on outer box (1) and set up in water pump (52) and level gauge (53) in storage water tank (51), the delivery port and storage water tank (51) inner chamber intercommunication of first drain pipe (17), level gauge (53) with water pump (52) electricity is connected, the delivery port of water pump (52) with the outlet pipe intercommunication of storage water tank (51), the outlet pipe and the municipal rainwater pipe network intercommunication of storage water tank (51), and install first check valve (54) on the outlet pipe of storage water tank (51).

3. A buried box substation according to claim 1, characterized in that: be provided with at least a set of locating component (43) on weather shield (42), locating component (43) include first connecting rod (431) and second connecting rod (432), first connecting rod (431) one end is articulated with weather shield (42), the other end with second connecting rod (432) pass through the bolt and articulate, first connecting rod (431) one end is kept away from in second connecting rod (432) and bearing plate (41) are articulated, just the articulated shaft of first connecting rod (431) and second connecting rod (432) all with the articulated shaft of weather shield (42) and bearing plate (41) is parallel.

4. A buried box substation according to claim 1, characterized in that: and accommodating cavities are formed in the side wall of the rain baffle plate (42) and on the two sides of the hinged shaft of the rain baffle plate (42) and the bearing plate (41), and an auxiliary baffle plate (421) is connected to the accommodating cavities in a sliding manner.

5. A buried box substation according to claim 1, characterized in that: telescopic machanism includes a plurality of edges telescopic link (7) that telescopic tube (6) circumference direction evenly set up, telescopic link (7) include a plurality of sleeves (71) that cup joint step by step, the equal vertical direction setting of sleeve (71) axis, sleeve (71) are close to and are provided with spring catch (711) on the lateral wall of outer box (1) one side, keep away from outside outer box (1) one side seted up with spring catch (711) complex pinhole (712), and outmost sleeve (71) be close to outer box (1) one end fixed connection in on outer box (1), inlayer outer box (1) one end is kept away from to sleeve (71) with outer box (1) one end fixed connection is kept away from in telescopic tube (6).

6. A buried box substation according to claim 1, characterized in that: a second drain pipe (18) is arranged on the outer box body (1) between the telescopic pipe (6) and the service well (2), the second drain pipe (18) is communicated with the first drain pipe (17), and a second check valve (181) is arranged on the second drain pipe (18).

7. A buried box substation according to claim 6, characterized in that: all be provided with filter screen (8) on the water inlet in first drain pipe (17) and second outlet, be provided with blanking cover (81) on filter screen (8).