Indoor substation structure with base isolation

Abstract

The present invention discloses a foundation-isolated indoor substation structure, comprising a cable layer raft foundation, a cable layer basement outer wall, a cable layer top plate, a cable layer frame column, a seismic isolation support, and a seismic isolation layer top plate; the cable layer basement outer wall and the cable layer frame column are respectively arranged on the cable layer raft foundation, the cable layer top plate is arranged on the top of the cable layer basement outer wall and the cable layer frame column, the seismic isolation support is respectively arranged on the top of the cable layer top plate at positions corresponding to the cable layer basement outer wall and the cable layer frame column, and the seismic isolation layer top plate is arranged on the top of the seismic isolation support. The upper structure and electrical equipment of the seismic isolation layer top plate of the present invention can be designed according to the reduced earthquake intensity, which greatly reduces the investment in civil engineering and the production cost of electrical equipment, and improves the safety of indoor substations in earthquakes.

Description

Technical Field

[0001] The invention relates to the technical field of transformer substation structures, and in particular to an indoor transformer substation structure with foundation isolation. Background Art

[0002] Indoor substations are mainly frame structures, usually 2 to 3 stories high, but with large floor heights and column spacings, many floor openings, and many important electrical equipment and precision instruments. Ensuring that its structure and internal equipment and instruments operate safely and reliably during earthquake disasters is one of the key tasks for power systems to cope with earthquakes.

[0003] During earthquake disasters, in addition to damage to the main structures of buildings and structures, the sophisticated electrical facilities in the station were also damaged to varying degrees.

[0004] At present, the design of substations mainly adopts the traditional earthquake-resistant concept, which resists earthquakes by increasing the cross-section of components and adding structural reinforcement. The earthquake-resistant design method generally only considers the structure itself, and pays less attention to the electrical equipment inside the substation, while the electrical equipment is very sensitive to the magnitude of horizontal earthquake acceleration. Compared with earthquake-resistant design, the seismic isolation technology that appeared in the 1960s can effectively reduce the horizontal seismic response of the structure and electrical equipment by setting up an isolation layer to hinder the transmission of horizontal earthquake effects to the upper structure, which has certain advantages for indoor substations. In recent years, seismic isolation technology has been widely used in the field of building structures, but has been less used in the field of substations.

[0005] Technicians in this technical field are committed to solving the above-mentioned technical defects. Summary of the invention

[0006] In view of the above-mentioned defects of the prior art, the technical purpose of the present invention is to solve the problems mentioned in the above-mentioned background technology.

[0007] To achieve the above technical objectives, the present invention provides a foundation-isolated indoor substation structure, comprising a cable layer raft foundation, a cable layer basement outer wall, a cable layer top plate, a cable layer frame column, a seismic isolation support, and a seismic isolation layer top plate;

[0008] The outer wall of the cable layer basement and the cable layer frame columns are respectively arranged on the cable layer raft foundation, and the cable layer top plate is arranged on the top of the outer wall of the cable layer basement and the cable layer frame columns. The seismic isolation bearings are respectively arranged on the top of the cable layer top plate at positions corresponding to the outer wall of the cable layer basement and the cable layer frame columns, and the seismic isolation layer top plate is arranged on the top of the seismic isolation bearings.

[0009] Preferably, the seismic isolation bearing is a laminated rubber bearing or a lead rubber bearing.

[0010] Preferably, a main transformer oil pit is provided at the bottom of the top plate of the seismic isolation layer, and the main transformer oil pit is filled with pebbles.

[0011] Preferably, for an indoor substation with a voltage level of 110 kV, the net volume of the main transformer oil pit is not less than ten cubic meters.

[0012] Preferably, for an indoor substation with a voltage level of 220 kV, the net volume of the main transformer oil pit is not less than 20 cubic meters.

[0013] Preferably, the porosity of the pebbles is not less than thirty percent.

[0014] Preferably, the outer side of the seismic isolation support is wrapped with a flexible fireproof layer, and the flexible fireproof layer is fixedly connected to the cable layer top plate and the seismic isolation layer top plate respectively through fixing bolts.

[0015] Preferably, electrical grounding components are embedded in the cable layer top plate and the isolation layer top plate respectively. The electrical grounding components are cut off at a position between the isolation support and the flexible fireproof layer and overlap bolts are reserved. The overlap bolts are connected by copper stranded wires.

[0016] Preferably, an above-ground frame is provided on the top of the top plate of the seismic isolation layer.

[0017] Beneficial effects of the present invention:

[0018] Due to the above-mentioned structural design, the present invention adopts a cable layer raft foundation to effectively reduce the seismic response of the indoor substation under the action of horizontal earthquakes, and blocks the seismic action in the top plate of the seismic isolation layer. The upper structure and electrical equipment of the top plate of the seismic isolation layer can be designed according to the reduced earthquake intensity, which greatly reduces the investment in civil engineering and the production cost of electrical equipment, and improves the safety of the indoor substation in earthquakes; it has a significant effect on improving the torsional irregularity of the structure of the indoor substation, reducing the inter-floor displacement angle and floor shear force, etc.; in rare earthquakes, the hysteresis energy dissipation of the seismic isolation bearings reduces the damage to the ground frame, thereby reducing the repair cost of the substation after the earthquake; at the same time, the space of the top plate of the seismic isolation layer is fully utilized to arrange the main transformer oil pit, thereby optimizing the space use of the cable layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 It is a schematic structural diagram of the seismic isolation support part of the present invention.

[0021] In the figure: 1 cable layer raft foundation, 2 cable layer basement outer wall, 3 cable layer top plate, 4 cable layer frame column, 5 seismic isolation bearing, 51 flexible fireproof layer, 52 fixing bolts, 53 electrical grounding parts, 54 lap bolts, 55 copper stranded wire, 6 seismic isolation layer top plate, 7 main transformer oil pit, 8 pebbles, 9 first floor frame, 10 second floor frame. DETAILED DESCRIPTION

[0022] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention. Example

[0023] like Figure 1-Figure 2 As shown, a base-isolated indoor substation structure comprises a cable layer raft foundation 1, a cable layer basement outer wall 2, a cable layer top plate 3, a cable layer frame column 4, a seismic isolation support 5, and a seismic isolation layer top plate 6;

[0024] The cable layer basement outer wall 2 and the cable layer frame column 4 are respectively arranged on the cable layer raft foundation 1, and a cable layer top plate 3 is arranged on the top of the cable layer basement outer wall 2 and the cable layer frame column 4, and seismic isolation bearings 5 ​​are arranged on the top of the cable layer top plate 3 corresponding to the positions of the cable layer basement outer wall 2 and the cable layer frame column 4, and a seismic isolation layer top plate 6 is arranged on the top of the seismic isolation bearing 5. The top of the seismic isolation layer top plate 6 is arranged with an above-ground frame, which includes a first-floor frame 9 and a second-floor frame 10. The first-floor frame 9 and the second-floor frame 10 are used as electrical equipment rooms and are mainly used to place important electrical equipment. The outer wall 2 of the cable layer basement is mainly used for laying cables.

[0025] Specifically, the seismic isolation bearing 5 adopts a laminated rubber bearing or a lead rubber bearing, and the quantity and specifications are determined according to the structural calculation; according to the requirements of the "Building Seismic Isolation Design Standard" GB / T51408-2021 and other specifications, the ground frame and the seismic isolation layer top plate 6 should be determined after trial calculation.

[0026] Specifically, the main transformer oil pit 7 is hung upside down below the top plate 6 of the seismic isolation layer and maintains common displacement. The pebbles 8 fill the interior of the main transformer oil pit 7.

[0027] Specifically, the net volume of the main transformer oil pit 7 is not less than ten cubic meters for an indoor substation of a voltage level of 110 kV, and is not less than twenty cubic meters for an indoor substation of a voltage level of 220 kV.

[0028] Specifically, the porosity of the pebbles 8 is not less than thirty percent.

[0029] Specifically, the outer side of the seismic isolation support 5 is wrapped with a flexible fireproof layer 51, and the flexible fireproof layer 51 is fixedly connected to the cable layer top plate 3 and the seismic isolation layer top plate 6 by fixing bolts 52, wherein the flexible fireproof layer 51 adopts a flexible fireproof blanket and the fixing bolts 52 adopt chemical bolts.

[0030] Specifically, electrical grounding components 53 are embedded in the cable layer top plate 3 and the seismic isolation layer top plate 6 respectively. The electrical grounding components 53 are cut off at a position between the seismic isolation support 5 and the flexible fireproof layer 51 and lap bolts 54 are reserved. The lap bolts 54 are connected by copper stranded wires 55. The straight-line unfolded length of the flexible fireproof layer 51 and the copper stranded wires 55 must meet the maximum horizontal displacement of the seismic isolation layer top plate 6.

[0031] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A base-isolated indoor substation structure, characterized in that: It includes a cable layer raft foundation (1), a cable layer basement outer wall (2), a cable layer top plate (3), a cable layer frame column (4), a seismic isolation bearing (5), and a seismic isolation layer top plate (6); The cable layer basement outer wall (2) and the cable layer frame column (4) are respectively arranged on the cable layer raft foundation (1); the cable layer top plate (3) is arranged on the top of the cable layer basement outer wall (2) and the cable layer frame column (4); the seismic isolation bearings (5) are respectively arranged on the top of the cable layer top plate (3) at positions corresponding to the cable layer basement outer wall (2) and the cable layer frame column (4); and the seismic isolation layer top plate (6) is arranged on the top of the seismic isolation bearings (5); A main transformer oil pit (7) is provided at the bottom of the seismic isolation layer top plate (6), and the main transformer oil pit (7) is filled with pebbles (8); All the seismic isolation supports (5) correspond one-to-one to the beams of the seismic isolation layer top plate (6), and the upper ends of all of them are connected to the beams of the seismic isolation layer top plate (6); The outer side of the seismic isolation support (5) is wrapped with a flexible fireproof layer (51), and the flexible fireproof layer (51) is fixedly connected to the cable layer top plate (3) and the seismic isolation layer top plate (6) respectively through fixing bolts (52); An electrical grounding member (53) is pre-buried in the cable layer top plate (3) and the seismic isolation layer top plate (6), respectively; the electrical grounding member (53) is cut off at a position between the seismic isolation support (5) and the flexible fireproof layer (51) and a lap bolt (54) is reserved; the lap bolts (54) are connected by copper strands (55); Cables are laid inside the outer wall (2) of the cable layer basement.

2. The base-isolated indoor substation structure according to claim 1, characterized in that: The seismic isolation bearing (5) adopts a laminated rubber bearing or a lead rubber bearing.

3. The base-isolated indoor substation structure according to claim 1 is characterized in that: For an indoor substation with a voltage level of 110 kV, the net volume of the main transformer oil pit (7) is not less than ten cubic meters.

4. The base-isolated indoor substation structure according to claim 1, characterized in that: For an indoor substation with a voltage level of 220 kV, the net volume of the main transformer oil pit (7) is not less than 20 cubic meters.

5. The base-isolated indoor substation structure according to claim 1, characterized in that: The porosity ratio of the pebbles (8) is not less than thirty percent.

6. The base-isolated indoor substation structure according to claim 1, characterized in that: A ground frame is arranged on the top of the seismic isolation layer top plate (6).

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