CN217720465U

CN217720465U - 800kVA case becomes installation construction structures

Info

Publication number: CN217720465U
Application number: CN202221734439.3U
Authority: CN
Inventors: 钱勇; 钱叶; 刘和东
Original assignee: Sichuan Yonglian Power Equipment Co ltd
Current assignee: Sichuan Yonglian Power Equipment Co ltd
Priority date: 2022-07-05
Filing date: 2022-07-05
Publication date: 2022-11-01
Anticipated expiration: 2032-07-05

Abstract

The utility model relates to an 800kVA box transformer substation installation construction structure, including the foundation ditch, the foundation ditch bottom is provided with the bottom plate, and the lateral wall is provided with the curb plate, and the cavity is enclosed with the curb plate to the bottom plate, and the curb plate is provided with a plurality of entrance holes and a plurality of wire holes, and the entrance hole is downthehole to be worn to be equipped with incoming wire cable, and the wire hole is downthehole to be worn to be equipped with the cable of being qualified for the next round of competitions, and a plurality of entrance holes are connected with the cable ditch of being qualified for the next round of competitions, and a plurality of wire holes are connected with the cable ditch of being qualified for the next round of competitions; the outgoing cable trench and the incoming cable trench both comprise trench bodies, fine sand layers are arranged at the bottoms of the trench bodies, concrete cladding pipes and backfill layers are arranged on the upper surfaces of the fine sand layers, the backfill layers cover the concrete cladding pipes, protection pipes are arranged in the concrete cladding pipes in a pre-buried mode, and outgoing cables or incoming cables are located in the protection pipes. The concrete-coated pipe is formed by pouring concrete, has high strength, has good protection effect on the internal protection pipe and the cable, and improves the safety of the cable. The protection tube can play waterproof, anticorrosive effect, further protects the cable.

Description

800kVA case becomes installation construction structures

Technical Field

The utility model belongs to the technical field of the electric power construction, especially, 800kVA case becomes installation and construction structure.

Background

A10 KV floor type metering box and an 800kVA box transformer substation are newly installed on a certain hangar area reconstruction project, the box transformer substation is provided with a transformer, and a low-voltage chamber and a high-voltage chamber are respectively arranged on two sides of the transformer. When the construction, become with other equipment through the cable junction case, have certain distance between other equipment and the case become, consequently need excavate the cable pit in order to lay cable, at present, generally directly bury the cable underground, the cable is impaired easily, wet etc. partly the construction is through setting up plastic protection pipe, lay the cable inside the protecting tube, can play certain guard action, but the intensity of plastic tubing is lower, probably excavate near the cable pit during other civil engineering constructions, lead to the cable to damage.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that an 800kVA case becomes installation and construction structure is provided, the security that improves cable laying.

In order to solve the above problem, the utility model adopts the technical scheme that: the 800kVA box transformer substation mounting construction structure comprises a foundation pit, wherein a bottom plate is arranged at the bottom of the foundation pit, a side plate is arranged on the side wall of the foundation pit, a cavity is formed by the bottom plate and the side plate in a surrounding mode, the upper end of the side plate is higher than the ground, a plurality of wire inlet holes and a plurality of wire outlet holes are formed in the side plate, wire inlet cables penetrate through the wire inlet holes, wire outlet cables penetrate through the wire outlet holes, the wire inlet holes are connected with wire inlet cable trenches, and the wire outlet holes are connected with wire outlet cable trenches;

the outgoing cable trench and the incoming cable trench both comprise trench bodies, fine sand layers are arranged at the bottoms of the trench bodies, concrete cladding pipes and backfill layers are arranged on the upper surfaces of the fine sand layers, the backfill layers cover the concrete cladding pipes, protective pipes are pre-buried in the concrete cladding pipes, and the outgoing cables or the incoming cables are located in the protective pipes.

Further, the thickness of the fine sand layer is greater than or equal to 100mm.

Further, the protection pipe is a PVC pipe.

Furthermore, the soil reclamation device also comprises a plurality of identification columns, wherein the lower ends of the identification columns are pre-buried in the backfill soil layer.

Furthermore, the bottom at the edge of the foundation pit is provided with a rectangular ring-shaped foundation lower support, the upper surface of the foundation lower support is provided with a rectangular ring-shaped foundation upper support, the rectangular inner holes of the foundation lower support and the foundation upper support are filled with a rammed earth layer, and the bottom plate and the side plates are supported by the foundation upper support.

Furthermore, the upper surface of bottom plate slope sets up, the lowest of bottom plate upper surface is provided with the drain pipe.

Furthermore, be provided with the ventilation hole on the curb plate of ground top, be provided with the wire net in the ventilation hole.

Furthermore, the upper end face of the side plate is pre-buried and provided with a conductive beam, the conductive beam is connected with a grounding wire, and the grounding wire extends to the position below the ground.

Further, the conductive beam is a channel steel.

Furthermore, threading pipes are arranged in the wire inlet hole and the wire outlet hole.

The utility model has the advantages that: the fine sand layer is filled with fine sand, and when the concrete pipe is impacted downwards, the fine sand layer can deform to play a role in shock absorption and improve the shock resistance of the concrete pipe. The concrete coated pipe is formed by pouring concrete, has high strength, has good protection effect on an internal protection pipe and a cable, and improves the safety of the cable. The protection tube can play waterproof, anticorrosive effect, further protects the cable.

Drawings

Fig. 1 is a schematic front view of the present invention;

fig. 2 is a schematic side view of the present invention;

fig. 3 is a schematic cross-sectional view of an outgoing cable trench and an incoming cable trench;

reference numerals: 1-a bottom plate; 2-side plate; 3-a wire inlet hole; 4, an outlet hole; 5-outgoing cable; 6, an incoming cable; 7-furrow body; 71-fine sand layer; 72-concrete pipe wrapping; 73-backfill soil layer; 74-protective tube; 75-a marker post; 8, supporting the lower part of the foundation; 9-supporting the upper part of the foundation; 10-ground; 11-a drain pipe; 12-steel wire mesh; 13-a conductive beam; 14-ground line; 15-rammed layer of plain soil.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

The utility model discloses an 800kVA case becomes installation and construction structure, as shown in fig. 1 and fig. 2, including the foundation ditch, the plane shape of foundation ditch is the rectangle, and the bottom of foundation ditch is provided with bottom plate 1, and the lateral wall of foundation ditch is provided with curb plate 2, and bottom plate 1 encloses into the cavity with curb plate 2, and the upper end of curb plate 2 is higher than ground 10. The thickness of the bottom plate 1 is about 100mm, and the bottom plate is formed by pouring 150# plain concrete. The side plates 2 can be formed by concrete pouring, brick laying at the lower part, concrete pouring at the top part and the like. And cement mortar layers with the thickness of 20mm are smeared on the upper surface of the bottom plate 1 and the inner side surfaces of the side plates 2.

In order to improve the stability of the bottom plate 1 and the side plate 2, a rectangular ring-shaped foundation lower support 8 is arranged at the bottom of the edge of the foundation pit, a rectangular ring-shaped foundation upper support 9 is arranged on the upper surface of the foundation lower support 8, a rammed earth layer 15 is filled in rectangular inner holes of the foundation lower support 8 and the foundation upper support 9, and the bottom plate 1 and the side plate 2 are supported by the foundation upper support 9. The thickness of the foundation lower support 8 is about 200mm, and the foundation upper support 9 is formed by C15 concrete casting, the thickness of the foundation upper support 9 is about 300mm, and the foundation upper support 9 is formed by C15 concrete casting, and the width of the foundation upper support 9 is smaller than the width of the foundation lower support 8, so that the foundation upper support 9 and the foundation lower support 8 are formed in a step shape, and the stability can be improved. Basic upper portion supports 9 and adopts the concrete material, and intensity is higher than plain soil, and bearing capacity is strong, consequently adopts basic upper portion to support bottom plate 1 and curb plate 2, can improve bottom plate 1 and curb plate 2's stability.

The upper end of curb plate 2 is higher than ground 10, and the 800kVA case becomes to install in the upper end of curb plate 2 for the bottom that the 800kVA case becomes is higher than ground 10, prevents that outside rainwater etc. from getting into the 800kVA case and becoming. In order to improve the heat dissipation performance of the 800kVA box transformer substation, a ventilation hole is formed in the side plate 2 above the ground 10, and a steel wire mesh 12 is arranged in the ventilation hole. Ventilation hole intercommunication cavity and external, external air can get into the cavity through the ventilation hole, takes away the heat, and the circulation of air is favorable to making the air in the cavity keep clean simultaneously to it maintains the maintenance to get into the cavity of 800kVA case transformer substation below to be convenient for operating personnel. The wire mesh 12 prevents external solid impurities from entering the cavity. In order to facilitate the maintenance and overhaul personnel to enter and exit the cavity, facilities such as a ladder stand and the like can be arranged on the inner side of the side plate 2.

After rainwater enters the cavity, in order to drain water in time to avoid the cable from being soaked, the upper surface of the bottom plate 1 is obliquely arranged, a drain pipe 11 is arranged at the lowest part of the upper surface of the bottom plate 1, and the drain pipe 11 leads to drainage facilities such as a nearby drainage ditch. When the construction site is located in a region where rainfall is large, a drain pump may be provided on the floor panel 1 to ensure a drain speed.

In order to facilitate ground protection of the 800kVA box transformer substation, a conductive beam 13 is pre-buried on the upper end face of the side plate 2, the conductive beam 13 is connected with a ground wire 14, and the ground wire 14 extends to the position below the ground 10. When the 800kVA box transformer substation is installed, the conductive beam 13 can be connected with the shell of the 800kVA box transformer substation in a welding mode, the conductive beam 13 can be connected with the 800kVA box transformer substation through conductive pieces such as bolts, and when electric leakage and static electricity occur in the 800kVA box transformer substation, electric charges can be conducted into the ground through the conductive beam 13 and the grounding wire 14. The underground around the foundation ditch is provided with the ground network, and the ground network includes many vertical earthing poles, links to each other through electrically conductive horizontal pole between the two adjacent earthing poles, and earthing pole and electrically conductive horizontal pole can adopt galvanized angle steel etc. and electrically conductive roof beam 13 can adopt the channel-section steel, and earth connection 14 can adopt the band steel. And after the grounding device is constructed, testing the grounding resistance to ensure that the grounding resistance is not more than 4 omega.

In order to facilitate the laying of cables, the side plate 2 is provided with a plurality of wire inlet holes 3 and a plurality of wire outlet holes 4, wire inlet cables 6 are arranged in the wire inlet holes 3 in a penetrating mode, wire outlet cables 5 are arranged in the wire outlet holes 4 in a penetrating mode, the wire inlet holes 3 are connected with wire inlet cable trenches, and the wire outlet holes 4 are connected with wire outlet cable trenches. Wire threading pipes are arranged in the wire inlet holes 3 and the wire outlet holes 4, the wire threading pipes are galvanized steel pipes, and cables penetrate through the galvanized steel pipes.

The outgoing cable trench and the incoming cable trench both comprise trench bodies 7, as shown in fig. 3, a fine sand layer 71 is arranged at the bottom of the trench bodies 7, a concrete-coated pipe 72 and a backfill layer 73 are arranged on the upper surface of the fine sand layer 71, the backfill layer 73 covers the concrete-coated pipe 72, a protection pipe 74 is pre-buried in the concrete-coated pipe 72, and the outgoing cable 5 or the incoming cable 6 is located in the protection pipe 74.

The fine sand layer 71 is made of fine sand with a particle size of less than 2mm and a thickness of 100mm or more. The fine sand has certain fluidity, so that the fine sand layer 71 can deform after being impacted, thereby playing a role in shock absorption. The concrete-coated pipe 72 is formed by pouring C30 concrete, the section of the concrete-coated pipe is rectangular, a protection pipe 74 is embedded in the concrete-coated pipe, the protection pipe 74 can be a steel pipe or the like, preferably a PVC pipe, and the concrete-coated pipe is light in weight and corrosion resistant. The backfill soil layer 73 is obtained by tamping the backfill soil.

When the concrete covered pipe 73 is impacted downwards, the fine sand layer 71 can deform to play a role in shock absorption, and the shock resistance of the concrete covered pipe 73 is improved. The concrete-coated tube 73 is formed by casting concrete, has high strength, has good protection effect on the internal protection tube 74 and the cable, and improves the safety of the cable. The protective tube 74 can play a role in water resistance and corrosion resistance, and further protects the cable.

The soil-filled building further comprises a plurality of identification columns 75, and the lower ends of the identification columns 75 are embedded in the backfill soil layer 73 in advance. The sign post 75 can adopt concrete cylinder, steel pipe cylinder etc. writes the cable pit at its lateral wall, has the cable down, forbids prompting such as excavation, tells other civil engineering constructors here to bury the cable underground, prevents that other civil engineering constructors from excavating above the cable.

The utility model discloses specific work progress does:

and (6) excavating a foundation pit.

And pouring the foundation upper support 9 and the foundation lower support 8 at the bottom edge of the foundation pit, wherein the foundation upper support 9 and the foundation lower support 8 can be poured separately or integrally. And after the strength of the upper foundation support 9 and the lower foundation support 8 meets the design requirements, filling the plain soil into the rectangular inner holes of the upper foundation support 9 and the lower foundation support 8, and tamping to form a plain soil tamping layer 15.

Pouring a bottom plate 1, pre-burying a drain pipe 11 during pouring, building or pouring a side plate 2 after the strength of the bottom plate 1 reaches design requirements, when constructing the side plate 2, pre-burying a threading pipe in a wire inlet hole 3 and a wire outlet hole 4, pre-burying a conductive beam 13 at the top of the side plate 2, reserving a ventilation hole on the upper part of the side plate 2, and installing a steel wire mesh 12 in the ventilation hole.

An outgoing cable trench is excavated outside the outgoing hole 4, an incoming cable trench is excavated outside the incoming hole 3, a fine sand layer 71 with the thickness of 100mm is paved at the bottom of the trench body 7, the outgoing cable 5 and the incoming cable 6 penetrate through the protection pipe 74, concrete is poured to coat the protection pipe 74 to form a concrete coated pipe 72, the concrete coated pipe 72 is placed on the surface of the fine sand layer 71, one end of the outgoing cable 5 enters the cavity through the outgoing hole 4, one end of the incoming cable 6 enters the cavity through the incoming hole 3, finally, the trench body 7 is backfilled, and the identification column 75 is embedded during backfilling.

And arranging an earth electrode around the foundation pit, welding the upper end of an earth wire 14 with the conductive beam 13, and welding the lower end of the earth wire with the earth electrode.

And the 800kVA box transformer substation is arranged at the top of the side plate 2, and the metal shell of the 00kVA box transformer substation is welded with the conductive beam 13.

And connecting the outgoing cable 5 and the incoming cable 6 to the 800kVA box transformer substation, and finishing construction.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. 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

1.800kVA box transformer substation installation construction structure, which comprises a foundation pit, wherein a bottom plate (1) is arranged at the bottom of the foundation pit, a side plate (2) is arranged on the side wall of the foundation pit, a cavity is enclosed by the bottom plate (1) and the side plate (2), the upper end of the side plate (2) is higher than the ground (10), the side plate (2) is provided with a plurality of wire inlet holes (3) and a plurality of wire outlet holes (4), a wire inlet cable (6) is arranged in each wire inlet hole (3) in a penetrating manner, a wire outlet cable (5) is arranged in each wire outlet hole (4) in a penetrating manner, the plurality of wire inlet holes (3) are connected with a wire inlet cable trench, and the plurality of wire outlet holes (4) are connected with a wire outlet cable trench;

the method is characterized in that: the outgoing cable trench and the incoming cable trench both comprise trench bodies (7), wherein fine sand layers (71) are arranged at the bottoms of the trench bodies (7), concrete cladding pipes (72) and backfill layers (73) are arranged on the upper surfaces of the fine sand layers (71), the backfill layers (73) cover the concrete cladding pipes (72), protection pipes (74) are pre-buried in the concrete cladding pipes (72), and the outgoing cables (5) or the incoming cables (6) are located in the protection pipes (74).

2. The installation and construction structure of the 800kVA box-type substation of claim 1, characterized in that: the thickness of the fine sand layer (71) is greater than or equal to 100mm.

3. The installation and construction structure of the 800kVA box-type substation of claim 1, characterized in that: the protection pipe (74) is a PVC pipe.

4. The 800kVA box-type substation installation construction structure of claim 1, characterized in that: the soil-filling and soil-filling machine further comprises a plurality of identification columns (75), wherein the lower ends of the identification columns (75) are embedded in the backfill soil layer (73).

5. The installation and construction structure of the 800kVA box-type substation of claim 1, characterized in that: the bottom at foundation ditch edge is provided with and is rectangular annular basis lower part support (8), the upper surface that basis lower part supported (8) is provided with and is rectangular annular basis upper portion support (9), fill in the rectangle hole of basis lower part support (8) and basis upper portion support (9) native soil tamp layer (15), bottom plate (1) and curb plate (2) are supported by basis upper portion support (9).

6. The installation and construction structure of the 800kVA box-type substation of claim 1, characterized in that: the upper surface slope of bottom plate (1) sets up, the lowest department of bottom plate (1) upper surface is provided with drain pipe (11).

7. The 800kVA box-type substation installation construction structure of claim 1, characterized in that: be provided with the ventilation hole on curb plate (2) on ground (10) top, be provided with wire net (12) in the ventilation hole.

8. The installation and construction structure of the 800kVA box-type substation of claim 1, characterized in that: the upper end face of the side plate (2) is pre-buried and provided with a conductive beam (13), the conductive beam (13) is connected with a grounding wire (14), and the grounding wire (14) extends to the position below the ground (10).

9. The 800kVA box-type substation installation construction structure of claim 8, characterized in that: the conductive beam (13) is a channel steel.

10. The installation and construction structure of the 800kVA box-type substation of claim 1, characterized in that: and threading pipes are arranged in the wire inlet hole (3) and the wire outlet hole (4).