CN112653001B

CN112653001B - Urban underground modular transformer substation

Info

Publication number: CN112653001B
Application number: CN202011408573.XA
Authority: CN
Inventors: 张星明; 尹步华
Original assignee: Nanjing Xingyuan Power Engineering Co ltd
Current assignee: Nanjing Xingyuan Power Engineering Co ltd
Priority date: 2020-12-03
Filing date: 2020-12-03
Publication date: 2022-06-17
Anticipated expiration: 2040-12-03
Also published as: CN112653001A

Abstract

The invention relates to the technical field of power equipment, in particular to an urban underground modular substation, which comprises electrical equipment and a shell for accommodating the electrical equipment, wherein the shell comprises two side plate bodies, a plurality of splicing plate bodies and a locking plate body, wherein the splicing plate bodies and the locking plate body are connected to the inner sides of the side plate bodies to form a bottom wall, a side wall and a top wall; the main part is formed by the concatenation plate body and the locking plate body concatenation combination of curb plate body and dispersion, this just makes whole shell do not need the hoist and mount of main equipment in transportation and handling, can assemble under the limited condition in space or place, therefore can adapt to more occasions, and only need a small amount of bolt mounting to fix in the assembling process, aerify and the locking part of locking connects through the concatenation after the concatenation between the concatenation plate body, increase the convenience of equipment and the leakproofness of concatenation casing, the while also has fine temperature proof ability that separates.

Description

Urban underground modular transformer substation

Technical Field

The invention relates to the technical field of power equipment, in particular to an urban underground modular substation.

Background

With the rapid development of economy in China, the construction of a power grid is also rapidly promoted. The urban load center has high land acquisition cost, limited planning land and high environmental protection requirement. Electric power becomes an indispensable energy source for urban life, and power supply is one of life lines for guaranteeing urban operation. In recent years, city construction is rapidly developed, living standard is continuously improved, and city electricity load shows a tendency of continuously and rapidly increasing. It is known that electrical load centers often coincide with the core of urban construction. For some big cities, the commercial planning of the core area is very compact, and the site selection difficulty for independently building large-scale transformer substations is increasing. The construction of large underground substations is a major development direction in the future.

At present, the urban distribution network mostly adopts modes such as a ring main unit and a box type transformer to realize the construction of a distribution network, and although the ring main unit and the box type transformer realize the compact and integrated installation of partial equipment, the urban distribution network still has the following defects:

1. the equipment in the box does not have underground operation conditions, and the protection and equipment operation environment cannot be met;

2. equipment can not be overhauled in the box, and the requirement on the operation space of the equipment is large;

3. the device can only be installed on the ground, the fence and the safety distance are required to be set around the device installation, the surrounding environment is affected to different degrees, and the remote monitoring function cannot be realized due to low automation degree.

Some transformer substation systems buried underground begin to appear in the prior art, but some problems also exist:

because the underground substation is arranged underground, the internal electrical equipment needs a protective shell chamber, and the shell chamber usually needs integral hoisting and transportation, special hoisting space and hoisting channels need to be arranged for the equipment, and some construction sites may not use large hoisting equipment due to limited space, so that a modular spliced substation is urgently needed.

Disclosure of Invention

The invention aims to provide an urban underground modular substation to solve the problems in the background technology.

In order to solve the technical problems, the invention provides the following technical scheme: city underground modularization transformer substation, including electrical equipment and the shell that holds electrical equipment, the shell includes that two curb plate bodies and a plurality of connect the inboard concatenation plate body, the locking plate body that forms diapire, lateral wall and roof of curb plate body, by be equipped with a breach on the roof that concatenation plate body and locking plate body formed, the shell is still including the roof that has the maintenance door, the roof can be dismantled the connection and be in make the inside of shell form a sealed device and hold the room on the breach, be equipped with on the concatenation plate body with the ventilation part of device holding room intercommunication. A lifting platform is arranged between the bottom of the shell and the underground pot hole, and the lifting platform controls the shell and devices in the shell to ascend to expose the earth surface or descend to be hidden underground. The lifting platform is driven by scissors to lift, and the lower part of the prefabricated cabin is provided with a fixed guide rail which is matched with the scissors to lift and drive; the two sides of the platform are provided with cable storage devices, so that the flexible use of cables in the cabin lifting process is met.

Further, the inboard border of curb plate body be equipped with the fixed position that the concatenation plate body is connected, the concatenation plate body is bilayer structure, the inside of concatenation plate body is equipped with the intermediate layer, the locking plate body is bilayer structure, the inside of locking plate body be equipped with the transition intermediate layer of intermediate layer intercommunication, fixed position on the curb plate body with interbedded position corresponds, be equipped with on the concatenation plate body with the valve body subassembly of intermediate layer intercommunication.

Furthermore, the splice plate body includes middle splice plate and turning splice plate, the turning splice plate can dismantle the connection and be in the both ends of middle splice plate, be equipped with on the laminating terminal surface of middle splice plate and turning splice plate with the through-hole of intermediate layer intercommunication, just still be equipped with on the laminating terminal surface of middle splice plate and turning splice plate at least one locking groove and with locking groove complex locking part.

Furthermore, two adjacent middle splicing plates or corner splicing plates are connected through an embedding part, an embedded groove matched with the embedding part is formed in the other side of each middle splicing plate or corner splicing plate, an expansion ring is arranged on the periphery of the embedding part, wedge-shaped clamping grooves distributed corresponding to the expansion rings are formed in the inner wall of the embedded groove, and wedge surfaces are formed in the sliding-in direction of the embedding part of each expansion ring.

Further, be close to curb plate body one end be equipped with sealed inclined plane on the concatenation plate body, fixed position includes flexonics portion, sealed awl and fixing bolt, fixing bolt runs through concatenation plate body and threaded connection be in on the curb plate body, sealed awl is located fixing bolt's the outside, just sealed awl with connect through flexonics portion between the curb plate body, the outside of sealed awl be equipped with sealed inclined plane complex sealed face, be equipped with the sealing washer on the butt joint terminal surface of curb plate body and concatenation plate body.

Further, the locking plate body is located two the intermediate position department of curb plate body, the concatenation plate body is close to the one end of locking plate body is equipped with first locking piece, the locking plate body includes inner panel and planking, the both sides of inner panel be equipped with first locking piece complex second locking piece, the both sides of planking be equipped with concatenation plate body complex sealing, second locking piece and first locking piece can be followed the length direction of locking plate body slides.

Further, the upper and lower both ends of concatenation plate body be equipped with respectively concatenation constant head tank and with concatenation constant head tank complex is protruding, be located the breach is followed outward all be equipped with the support step on curb plate body, concatenation plate body and the locking plate body.

Furthermore, the locking part includes activity barrel, flexible adapter sleeve and depression bar, the activity barrel pass through the flexible adapter sleeve with concatenation plate body or locking plate body connect, the inside of activity barrel be equipped with the inlet channel of intermediate layer or intermediate layer transition intercommunication, the inside of activity barrel still be equipped with the elastic deformation portion that the inlet channel is connected, it has a plurality of to articulate on the activity barrel the depression bar, elastic deformation portion is located the inboard of depression bar.

Furthermore, the inboard in locking groove is equipped with the cambered surface, will after the elastic deformation portion inflation the depression bar is outwards extruded, makes the tip of depression bar is contradicted on the cambered surface, the activity barrel is in inlet channel's inlet end is equipped with the spacing ring.

Further, the curvature of the cambered surface gradually decreases towards the direction deviating from the center of the circle.

Compared with the prior art, the invention has the following beneficial effects:

the urban underground transformer substation can be subjected to customized design according to the terrain of an installation place, the characteristics of surrounding environment and the like, the requirement of overall planning and construction is met, and the use function of a functional design expansion part can be carried out;

the urban underground modular transformer substation adopts a compact arrangement mode, the equipment is uniformly arranged in a prefabricated cabin, underground installation can be carried out, and the equipment can be directly arranged nearby a load center according to the load condition;

the urban underground modular transformer substation is provided with a reserved inspection channel in an underground installation place in consideration of convenience of operation and maintenance, can realize integral lifting of the transformer substation through a lifting platform, can carry out operation and maintenance when the transformer substation is lifted above the ground, and has the requirement of integral maintenance and maintenance of equipment;

the main body of the invention is formed by splicing and combining the side plate bodies, the scattered splicing plate bodies and the locking plate bodies, so that the whole shell can be assembled under the condition of limited space or field without hoisting large-scale equipment in the transportation and carrying processes, and can be suitable for more occasions.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is an installation schematic of the present invention;

FIG. 2 is a schematic structural view of the present invention;

FIG. 3 is a schematic top view of the present invention;

FIG. 4 is a schematic view of the structure at A in FIG. 3;

FIG. 5 is a schematic view of the structure at B in FIG. 3;

FIG. 6 is a schematic view of the structure of the splice plate body of the present invention;

FIG. 7 is a schematic diagram of the construction of the intermediate splice plate according to the present invention;

FIG. 8 is another schematic structural view of FIG. 7;

FIG. 9 is a schematic view of the structure at C in FIG. 8;

FIG. 10 is another schematic structural view of FIG. 9;

in the figure: 1. a side plate body; 101. a device accommodating chamber; 11. supporting a step; 12. a flexible connection; 13. sealing a cone; 14. fixing the bolt; 2. splicing the plate bodies; 201. a first locking block; 202. sealing the inclined plane; 203. an interlayer; 204. a locking groove; 205. splicing the positioning grooves; 21. a middle splice plate; 211. an insertion section; 212. an expansion ring; 22. a corner splice plate; 3. locking the plate body; 301. a transition interlayer; 31. an inner plate; 311. a second locking block; 32. an outer plate; 321. a sealing part; 4. a top plate; 41. repairing the door; 42. a ventilation component; 43. a valve body assembly; 5. a locking member; 501. an intake passage; 51. a movable barrel; 511. a limiting ring; 52. a flexible connecting sleeve; 53. an elastic deformation portion; 54. a pressure lever.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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 invention.

Referring to fig. 1-10, the present invention provides the following technical solutions: urban underground modular substation, including electrical equipment and the shell that holds electrical equipment, the shell includes that two curb plate bodies 1 and a plurality of connect and form the diapire at curb plate body 1 inboard, the concatenation plate body 2 of lateral wall and roof, locking plate body 3, be equipped with a breach on the roof that is formed by concatenation plate body 2 and locking plate body 3, the shell is still including having roof 4 of maintenance door 41, roof 4 can be dismantled the connection and make the inside of shell form a sealed device accommodation chamber 101 on the breach, be equipped with the ventilation part 42 who communicates with device accommodation chamber 101 on the concatenation plate body 2. A lifting platform is arranged between the bottom of the shell and the underground pot hole.

The side plate body 1 plays a role in supporting the splicing plate body 2, the two side plate bodies 1 are firstly hung in a foundation pit by using a simple hanging tool, the two plate bodies are erected, then the splicing plate body 2 and the locking plate body 3 are placed in the foundation pit for splicing, the splicing plate body 2 at the bottom is spliced to the bottom of the side plate body 1, then the splicing plate body 2 at the upper part is spliced, then the splicing plate body 2 is extended inwards until the splicing plate body is spliced to a proper width, finally the locking plate body 3 is installed at the position of a first locking block 201 at the inner side of the splicing plate body 2 from top to bottom for clamping, wherein the lower part of the locking plate body 3, namely the part forming the floor, is a whole, when the locking plate body 3 is jointed with the splicing plate body 2, a seal is formed, a gap is arranged on the top wall formed by the splicing plate body 2 and the locking plate body 3, then the valve body assembly 43 is utilized to inflate the transition interlayer 301 communicated with the interlayer 203 inside the splicing plate body 2 and the locking plate body 3, the splice plates are spliced tightly and reliably, and the device is hung in the device accommodating chamber 101 by using small-sized hoisting equipment to be installed.

Specifically, as shown in fig. 6, the inboard border of the side plate body 1 is equipped with the fixed position of being connected with the concatenation plate body 2, and the concatenation plate body 2 is bilayer structure, and the inside of the concatenation plate body 2 is equipped with intermediate layer 203, and the locking plate body 3 is bilayer structure, and the inside of the locking plate body 3 is equipped with the transition intermediate layer 301 that communicates with intermediate layer 203, and the fixed position on the side plate body 1 corresponds with the position of intermediate layer 203, is equipped with the valve body assembly 43 that communicates with intermediate layer 203 on the concatenation plate body 2.

The splicing plate body 2 and the locking plate body 3 with double-layer structures are utilized, the splicing plate body 2 can be installed on the fixed position on the inner side of the side plate body 1 in a concealed mode, meanwhile, the double-layer structures also play good heat insulation and sound insulation effects, the interference of external heat to the temperature inside a shell is prevented, the operation of equipment is enabled to be more silent, the valve body assembly 43 is utilized to charge air or oil into an interlayer after the equipment is assembled through the double-layer structures, an expansion piece in the splicing plate body 2 can be expanded, the sealing performance is improved, the valve body assembly 43 and the ventilation part 42 are matched, the ventilation part 42 comprises a fan and a pump, the pump is matched with the valve body assembly 43, cooling oil in the interlayer 203 is enabled to circulate, heat exchange is carried out on the upper portion, a better heat dissipation effect can be achieved, the splicing plate body 2 and the locking plate body 3 which are positioned on the upper portion are in contact with air, and the heat dissipation fins are arranged to increase the heat exchange effect.

Specifically, as shown in fig. 6, the splice plate body 2 includes an intermediate splice plate 21 and a corner splice plate 22, the corner splice plate 22 is detachably connected to two ends of the intermediate splice plate 21, a through hole communicated with the interlayer 203 is formed in the joint end faces of the intermediate splice plate 21 and the corner splice plate 22, and at least one locking groove 204 and a locking component 5 matched with the locking groove 204 are further formed in the joint end faces of the intermediate splice plate 21 and the corner splice plate 22.

Middle splice plate 21 is the straight board that does not have the turning, and turning splice plate 22 is the board of bending that has ninety degrees angle of bending, be used in turning concatenation department, all can splice between turning splice plate 22 and the middle splice plate 21 and between turning splice plate 22 and the turning splice plate 22, on the involution face from top to bottom, a through-hole has all been set up, mainly can make the intermediate layer 203 among the concatenation especially two-layer or front and back two-layer concatenation plate body 2 intercommunication each other about the concatenation back, locking groove 204 and locking part 5 have been set up on the terminal surface of concatenation simultaneously, after the concatenation is accomplished, aerify or the oil-filling in the intermediate layer 203, make locking part 5 inflation and take place the removal, lock to on another locking groove 204, just so make two concatenation plate bodies 2 of interconnect connect inseparabler.

Specifically, as shown in fig. 7, two adjacent middle splicing plates 21 or corner splicing plates 22 are connected by an embedding portion 211, an embedding groove matched with the embedding portion 211 is formed in the other side of each middle splicing plate 21 or corner splicing plate 22, an expansion ring 212 is arranged on the periphery of the embedding portion 211, wedge-shaped clamping grooves distributed corresponding to the expansion ring 212 are formed in the inner wall of the embedding groove, and wedge surfaces are formed in the sliding-in direction of the embedding portion 211 by the expansion ring 212.

In order to facilitate the installation between the middle splice plate 21 and the corner splice plate 22, the embedding part 211 on one side is connected with the embedding groove on the other side, the connection is not in the same direction with the locking groove 204 and the locking component 5, after the embedding part 211 enters the embedding groove, the expansion ring 212 is clamped with the wedge-shaped clamping groove, wherein the expansion ring 212 is made of elastic rubber, and when the interlayer 203 is stressed to expand, further locking and sealing are realized, and the wedge surface can prevent the wedge surface from sliding out in the sliding-in direction, so that the one-way locking effect is realized.

Specifically, as shown in fig. 5, a sealing inclined plane 202 is arranged on the splicing plate body 2 close to one end of the side plate body 1, the fixing portion comprises a flexible connecting portion 12, a sealing cone 13 and a fixing bolt 14, the fixing bolt 14 penetrates through the splicing plate body 2 and is in threaded connection with the side plate body 1, the sealing cone 13 is located on the outer side of the fixing bolt 14, the sealing cone 13 is connected with the side plate body 1 through the flexible connecting portion 12, a sealing surface matched with the sealing inclined plane 202 is arranged on the outer side of the sealing cone 13, and a sealing ring is arranged on the involution end surface of the side plate body 1 and the splicing plate body 2.

When one side installation concatenation plate body 2 at curb plate body 1, pass fixing bolt 14 and connect plate body 2 then threaded connection and fix on curb plate body 1, when aerifing or the oil charge in intermediate layer 203, pressure promotes sealed awl 13 and sealed inclined plane 202 laminating in one side of sealed awl 13, realize the further sealing of curb plate body 1 and concatenation plate body 2 contact surface, improve sealed effect, be equipped with the sealing washer on the terminal surface that closes of curb plate body 1 and concatenation plate body 2, can reach certain sealed effect, aerify earlier in the intermediate layer 203 preferably, then the oil charge again after atmospheric pressure is stable, can realize oil charge increase after totally sealed again and seal and the heat transfer effect.

Specifically, the locking plate body 3 is located the intermediate position department of two curb plate bodies 1, the one end that the splice plate body 2 is close to the locking plate body 3 is equipped with first locking piece 201, the locking plate body 3 includes inner panel 31 and planking 32, the both sides of inner panel 31 be equipped with first locking piece 201 complex second locking piece 311, the both sides of planking 32 be equipped with splice plate body 2 complex sealing 321, second locking piece 311 and first locking piece 201 can be followed the length direction slip of locking plate body 3.

After splicing the plate body 2, the locking plate body 3 needs to be connected in the middle, the splicing plate bodies 2 on two sides are connected, at the moment, the locking plate body 3 is hung down from the upper side to the lower side along the gap of the first locking block 201, so that the second locking block 311 is completely matched with the first locking block 201, sealing strips are arranged on the first locking block 201 and the second locking block 311, the sealing capacity after connection is ensured, and the sealing parts 321 on two sides of the outer plate 32, which are matched with the splicing plate bodies 2, are utilized to further improve the sealing performance.

Specifically, the upper and lower both ends of the splice plate body 2 are respectively provided with a splice positioning groove 205 and a protrusion matched with the splice positioning groove 205, and the side plate body 1, the splice plate body 2 and the locking plate body 3 which are positioned at the outer edge of the notch are all provided with a supporting step 11.

Make things convenient for two concatenation plate bodies 2 to fix a position when the concatenation like this, the breach is outer along the supporting step 11 on the curb plate body 1, the concatenation plate body 2 and the locking plate body 3 can be used for supporting and connecting roof 4, support on the step 11 and the inboard of connecting roof 4 and set up the sealing washer and realize sealing.

Specifically, as shown in fig. 9, the locking component 5 includes a movable cylinder 51, a flexible connecting sleeve 52 and a pressing rod 54, the movable cylinder 51 is connected to the splicing plate 2 or the locking plate 3 through the flexible connecting sleeve 52, an air inlet channel 501 communicated with the interlayer 203 or the transition interlayer 301 is arranged inside the movable cylinder 51, an elastic deformation portion 53 connected to the air inlet channel 501 is further arranged inside the movable cylinder 51, the movable cylinder 51 is hinged to a plurality of pressing rods 54, and the elastic deformation portion 53 is located inside the pressing rod 54.

Specifically, the inner side of the locking groove 204 is provided with an arc surface, when the elastic deformation portion 53 expands, the pressing rod 54 is extruded outwards, so that the end of the pressing rod 54 abuts against the arc surface, and the movable cylinder 51 is provided with a limiting ring 511 at the air inlet end of the air inlet channel 501.

After the splicing plate bodies 2 are completely closed, after the interlayer 203 is inflated, the air inlet channel 501 is inflated, so that the movable cylinder body 51 integrally moves towards the locking groove 204, then the elastic deformation part 53 expands again, the pressing rod 54 extrudes outwards, the end part of the pressing rod is abutted to the arc surface on the inner side of the locking groove 204, positioning is realized, and when the extrusion force is larger, the pressure of the pressing rod 54 on the locking groove 204 is larger, and the connection between the two splicing plate bodies 2 is tighter.

Specifically, the curvature of the arc surface gradually decreases in a direction deviating from the center of the circle.

Since the curvature of the arc surface gradually decreases in the direction away from the center of the circle, when the pressing rod 54 moves outward, the greater the pressure on the locking groove 204, the tighter the connection between the two splice plates 2.

The working principle of the invention is as follows: the side plate body 1 plays a role in supporting the splicing plate body 2, the two side plate bodies 1 are firstly hung in a foundation pit by using a simple hanging tool, the two plate bodies are erected, then the splicing plate body 2 and the locking plate body 3 are placed in the foundation pit for splicing, the splicing plate body 2 at the bottom is spliced to the bottom of the side plate body 1, then the splicing plate body 2 at the upper part is spliced, then the splicing plate body 2 is extended inwards until the splicing plate body is spliced to a proper width, finally the locking plate body 3 is installed at the position of a first locking block 201 at the inner side of the splicing plate body 2 from top to bottom for clamping, wherein the lower part of the locking plate body 3, namely the part forming the floor, is a whole, when the locking plate body 3 is jointed with the splicing plate body 2, a seal is formed, a gap is arranged on the top wall formed by the splicing plate body 2 and the locking plate body 3, then the valve body assembly 43 is utilized to inflate the transition interlayer 301 communicated with the interlayer 203 inside the splicing plate body 2 and the locking plate body 3, the splicing plates are spliced tightly and reliably, the devices are hung in the device accommodating chamber 101 by small hoisting equipment for installation, the splicing plates 2 and the locking plates 3 with double-layer structures can be used for mounting the splicing plates 2 on the fixed parts at the inner sides of the side plates 1 in a concealed mode, meanwhile, the double-layer structures also have good heat insulation and sound insulation effects, the interference of external heat on the internal temperature of the shell is prevented, the equipment runs more quietly, the expansion piece in the splicing plates 2 can be expanded by inflating or filling oil into the interlayer by using the valve body assembly 43 after the equipment is assembled through the double-layer structures, the sealing performance is improved, the cooling oil in the interlayer is circulated by matching the valve body assembly 43 and the ventilation part 42, the heat exchange is carried out at the upper part, the better heat dissipation effect can be achieved, the middle splicing plate 21 is a straight plate without corners, the corner splice plate 22 is a bent plate with a ninety-degree bending angle, and is used at the corner splice, the corner splice plate 22 and the middle splice plate 21 as well as the corner splice plate 22 and the corner splice plate 22 can be spliced, a through hole is arranged on the upper and lower mating surfaces, and mainly can enable interlayers 203 in spliced splice plates 2, especially in the upper and lower layers or the front and rear layers, to be communicated with each other, and meanwhile, a locking groove 204 and a locking part 5 are arranged on the spliced end surface, after the splicing is completed, the interlayers 203 are inflated or filled with oil, the air inlet channel 501 is inflated, so that the whole movable cylinder body 51 moves towards the locking groove 204, then the elastic deformation part 53 expands again, so that the pressing rod 54 is extruded outwards, the end part of the pressing rod is abutted against the cambered surface at the inner side of the locking groove 204, the positioning is realized, and when the extrusion force is larger, the pressure of the pressing rod 54 on the locking groove 204 is larger, the tighter the connection between the two splice boards 2.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The urban underground modular substation comprises electrical equipment and a shell for containing the electrical equipment, and is characterized in that the shell comprises two side plate bodies (1), a plurality of splicing plate bodies (2) and locking plate bodies (3), wherein the splicing plate bodies (2) and the locking plate bodies (3) are connected to the inner sides of the side plate bodies (1) to form a bottom wall, a side wall and a top wall, a gap is formed in the top wall formed by the splicing plate bodies (2) and the locking plate bodies (3), the shell further comprises a top plate (4) with a maintenance door (41), the top plate (4) is detachably connected to the gap to enable the interior of the shell to form a sealed device containing chamber (101), and a ventilation component (42) communicated with the device containing chamber (101) is arranged on the splicing plate body (2); a lifting platform is arranged between the bottom of the shell and the underground pot hole;

the inboard border of curb plate body (1) be equipped with the fixed position that concatenation plate body (2) are connected, concatenation plate body (2) are bilayer structure, the inside of concatenation plate body (2) is equipped with intermediate layer (203), locking plate body (3) are bilayer structure, the inside of locking plate body (3) be equipped with transition intermediate layer (301) of intermediate layer (203) intercommunication, fixed position on the curb plate body (1) with the position of intermediate layer (203) corresponds, be equipped with on the concatenation plate body (2) with valve body subassembly (43) of intermediate layer (203) intercommunication.

2. The urban underground modular substation according to claim 1, characterized in that: splice plate body (2) are including middle splice plate (21) and turning splice plate (22), turning splice plate (22) can be dismantled to be connected the both ends of middle splice plate (21), be equipped with on the laminating terminal surface of middle splice plate (21) and turning splice plate (22) with the through-hole of intermediate layer (203) intercommunication, just still be equipped with at least one locking groove (204) on the laminating terminal surface of middle splice plate (21) and turning splice plate (22) and with locking groove (204) complex locking part (5).

3. An urban underground modular substation according to claim 2, characterized in that: two adjacent connect through embedding portion (211) between middle splice plate (21) or corner splice plate (22), the opposite side of middle splice plate (21) or corner splice plate (22) be equipped with embedding portion (211) complex embedded groove, the periphery of embedding portion (211) is equipped with one expansion ring (212), the inner wall of embedded groove be equipped with expansion ring (212) correspond the wedge type draw-in groove that distributes, expansion ring (212) are in the slip-in direction of embedding portion (211) has the wedge face.

4. An urban underground modular substation according to claim 3, characterized in that: be close to curb plate body (1) one end be equipped with sealed inclined plane (202) on concatenation plate body (2), fixed position includes flexonics portion (12), sealed awl (13) and fixing bolt (14), fixing bolt (14) run through concatenation plate body (2) and threaded connection are in on curb plate body (1), sealed awl (13) are located the outside of fixing bolt (14), just sealed awl (13) with connect through flexonics portion (12) between curb plate body (1), the outside of sealed awl (13) be equipped with sealed inclined plane (202) complex sealed face, be equipped with the sealing washer on the involution terminal surface of curb plate body (1) and concatenation plate body (2).

5. An urban underground modular substation according to claim 4, characterized in that: the locking plate body (3) is located two the intermediate position department of curb plate body (1), the concatenation plate body (2) are close to the one end of locking plate body (3) is equipped with first locking piece (201), locking plate body (3) are including inner panel (31) and planking (32), the both sides of inner panel (31) be equipped with first locking piece (201) complex second locking piece (311), the both sides of planking (32) be equipped with concatenation plate body (2) complex sealing (321), second locking piece (311) and first locking piece (201) can be followed the length direction of locking plate body (3) slides.

6. An urban underground modular substation according to claim 5, characterized in that: the upper and lower both ends of concatenation plate body (2) be equipped with respectively concatenation constant head tank (205) and with concatenation constant head tank (205) complex is protruding, is located follow outside the breach all be equipped with support step (11) on curb plate body (1), concatenation plate body (2) and the locking plate body (3).

7. An urban underground modular substation according to claim 6, characterized in that: locking part (5) are including activity barrel (51), flexible adapter sleeve (52) and depression bar (54), activity barrel (51) through flexible adapter sleeve (52) with splice plate body (2) or locking plate body (3) are connected, the inside of activity barrel (51) be equipped with inlet channel (501) of intermediate layer (203) or transition intermediate layer (301) intercommunication, the inside of activity barrel (51) still be equipped with elastic deformation portion (53) that inlet channel (501) are connected, it has a plurality of to articulate on activity barrel (51) depression bar (54), elastic deformation portion (53) are located the inboard of depression bar (54).

8. An urban underground modular substation according to claim 7, characterized in that: the inside of locking groove (204) is equipped with the cambered surface, will after elastic deformation portion (53) inflation depression bar (54) are outwards extruded, make the tip of depression bar (54) contradict in the cambered surface, activity barrel (51) are in the inlet end of inlet channel (501) is equipped with spacing ring (511).

9. An urban underground modular substation according to claim 8, characterized in that: the curvature of the cambered surface is gradually reduced towards the direction deviating from the circle center.