An adjustable-size transformer substation foundation and its construction method

Abstract

This invention relates to an adjustable-size prefabricated substation foundation and its construction method. The foundation includes an open-top box-shaped structure comprising a steel frame adjustable in length, width, and height. The steel frame consists of an inner frame and an outer frame, with steel plates inserted between the inner and outer frames at the bottom and around the sides of the box. This invention utilizes an adjustable-size steel frame, allowing for adjustments to the length of the steel pipes and the size of the frame as needed. This makes the invention applicable to most types of prefabricated substations, greatly expanding its scope of application. It solves the problem of time-consuming multiple formwork fabrication required in traditional cast-in-place prefabricated substation foundation methods. The prefabrication method simplifies the structure, significantly reduces construction costs, and allows for standardized construction requirements.

Description

Technical Field

[0001] This invention relates to the field of power technology, and in particular to an adjustable-size transformer substation foundation and its construction method. Background Technology

[0002] A prefabricated substation, also known as a box-type substation, is essentially a substation housed within a prefabricated steel structure. Early substations were built above ground or underground, making them impossible to relocate as a whole. Prefabricated substations, however, allow for relocation. They contain transformers, high-voltage or low-voltage distribution cabinets, and other power distribution facilities. The foundation for this prefabricated substation is designed according to its dimensions, weight, cable installation, operation, maintenance, and repair requirements. The foundation is also commonly referred to as the building foundation for the inverter and the prefabricated transformer. By pre-embedding steel plates in the foundation, a balanced and stable base is provided for the installation of the inverter and the substation itself.

[0003] Most existing prefabricated substation foundations are cast-in-place based on the dimensions of the substation boxes. However, substation boxes come in many types and sizes, requiring the fabrication of corresponding formwork based on their dimensions. Each type of substation box necessitates a separate prefabricated foundation, requiring on-site reinforcement binding, formwork erection, concrete pouring, and subsequent formwork removal. This process is time-consuming and costly, incurring significant expenses from foundation excavation, reinforcement binding, formwork fabrication, concrete pouring, curing, and formwork removal. The construction period for cast-in-place substation foundations often takes a month or more, consuming substantial manpower and resources. Summary of the Invention

[0004] In view of this, the purpose of this invention is to provide a simple, versatile, and adjustable-size transformer substation foundation and its construction method, which improves construction efficiency, reduces the input of manpower and material resources, and lowers construction costs.

[0005] The present invention is implemented by the following scheme: an adjustable-size transformer substation foundation, including a box with an open top, the box including a steel frame whose size can be adjusted in three directions: length, width and height, the steel frame is composed of an inner frame and an outer frame, and steel plates are provided at the bottom and around the box, which are inserted between the inner frame and the outer frame.

[0006] Furthermore, both the inner and outer skeletons are welded from expandable steel pipes.

[0007] Furthermore, the retractable steel pipe consists of three sections: steel pipe A at both ends and steel pipe B in the middle. The cross-sectional dimension of steel pipe B is smaller than that of steel pipe A, and both ends of steel pipe B extend into steel pipe A.

[0008] Furthermore, the steel pipe B has locating holes spaced apart along its length, and the steel pipe A has an adjusting bolt passing through the locating holes at one end facing the middle.

[0009] Another technical solution of the present invention: a construction method for a box-type substation foundation with adjustable dimensions as described above, comprising the following steps: (1) making a telescopic steel pipe; (2) welding an inner frame and an outer frame using the telescopic steel pipe; (3) assembling the inner frame and the outer frame together to make a steel skeleton, with the inner frame and the outer frame forming gaps at the bottom and around the steel skeleton for inserting steel plates; (4) transporting the steel skeleton to the site and adjusting the length, width and height of the steel skeleton to the corresponding dimensions required by the box-type substation according to the dimensions of the box-type substation; (5) making steel plates according to the dimensions of the steel skeleton and inserting the steel plates into the gaps between the inner frame and the outer frame around the steel skeleton and at the bottom to form a box-type substation foundation.

[0010] Compared with the prior art, the present invention has the following beneficial effects: The present invention adopts an adjustable steel frame, and the length of the steel pipe can be adjusted at any time as needed to change the size of the steel frame, making the present invention applicable to most specifications of box-type substations, greatly expanding the scope of application of the present invention, with good versatility, and solving the problem of the long time required to make templates multiple times in the traditional box-type substation foundation casting method; the prefabrication method has a simple structure, which greatly improves construction efficiency, reduces the input of manpower and material resources, reduces construction costs, and can form standardized construction requirements.

[0011] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through specific embodiments and related drawings. Attached Figure Description

[0012] Figure 1 This is a perspective view of the transformer substation foundation according to an embodiment of the present invention;

[0013] Figure 2 This is a top view of the transformer substation foundation according to an embodiment of the present invention;

[0014] Figure 3 This is a cross-sectional view of the transformer substation foundation according to an embodiment of the present invention;

[0015] Figure 4 This is a partial structural diagram of one side of the transformer substation foundation according to an embodiment of the present invention;

[0016] The labels in the diagram are as follows: 1-box body, 2-inner frame, 3-outer frame, 4-steel plate, 5-expandable steel pipe, 6-steel pipe A, 7-steel pipe B, 8-limiting hole, 9-adjusting bolt. Detailed Implementation

[0017] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0018] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0019] like Figures 1-4 As shown, an adjustable-size transformer substation foundation includes a top-open box 1. The box 1 comprises a steel frame whose dimensions are adjustable in length, width, and height. The steel frame consists of an inner frame 2 and an outer frame 3, forming a retractable steel frame that can be adjusted in length, width, and height. Steel plates 4 are inserted between the inner and outer frames at the bottom and around the sides of the box. A gap is left between the inner and outer frames 2 and 3 to accommodate the steel plates. The size of the steel plates is determined by the required dimensions of the transformer substation foundation and is designed as 20cm wide steel strips. This method replaces the traditional method of cast-in-place or assembled transformer substation foundations, effectively improving the current situation where there are many types of transformer substation foundations with inconsistent sizes, and each type of foundation can only be configured with a prefabricated foundation. This invention makes the transformer substation foundation a prefabricated component. By adjusting the dimensions of the steel frame and inserting steel plates as a sandwich layer within the steel frame, the transformer substation foundation is formed. The structure is simple, construction is convenient, and it occupies little space, significantly improving construction efficiency and reducing the input of manpower and materials.

[0020] In this embodiment, both the inner and outer frames are welded together using expandable steel pipes 5. Each side of the inner and outer frames is welded together with vertical and horizontal expandable steel pipes 5. The length of the vertical and horizontal expandable steel pipes 5 can be adjusted according to the required dimensions of the transformer substation foundation to achieve the required dimensions.

[0021] In this embodiment, the telescopic steel pipe consists of three sections: steel pipes A6 at both ends and steel pipe B7 in the middle. The cross-sectional dimensions of steel pipe B are smaller than those of steel pipe A, and both ends of steel pipe B extend into steel pipe A.

[0022] In this embodiment, the steel pipe B has locating holes 8 spaced apart along its length, and the steel pipe A has an adjusting bolt 9 passing through the locating holes at one end facing the middle.

[0023] A construction method for an adjustable-size box-type substation foundation as described above includes the following steps: (1) fabricating a telescopic steel pipe; (2) welding an inner frame and an outer frame using the telescopic steel pipe; (3) assembling the inner frame and the outer frame together to form a steel skeleton, with the inner and outer frames forming gaps at the bottom and around the steel skeleton for inserting steel plates; (4) transporting the steel skeleton to the site and adjusting the length, width, and height of the steel skeleton to the corresponding dimensions required by the box-type substation according to the dimensions of the box-type substation; (5) fabricating steel plates according to the dimensions of the steel skeleton, the thickness of which should be determined by the gap between the inner and outer frames on the steel skeleton, and can be set as steel strips of the same width but different lengths, selecting an appropriate number as needed, and inserting the steel plates into the gaps between the inner and outer frames around and at the bottom of the steel skeleton to form a box-type substation foundation.

[0024] Unless otherwise stated, if any of the technical solutions disclosed in this invention specify a numerical range, then the disclosed numerical range is a preferred numerical range. Anyone skilled in the art should understand that the preferred numerical range is merely one among many feasible numerical values ​​that has a more obvious or representative technical effect. Because there are many numerical values, it is impossible to list them all. Therefore, this invention discloses only some numerical values ​​to illustrate the technical solutions of this invention. Furthermore, the numerical values ​​listed above should not constitute a limitation on the scope of protection of this invention.

[0025] If this invention discloses or relates to mutually fixedly connected components or structural parts, then, unless otherwise stated, a fixed connection can be understood as: a detachable fixed connection (e.g., using bolts or screws), or a non-detachable fixed connection (e.g., riveting, welding). Of course, mutually fixed connections can also be replaced by an integral structure (e.g., manufactured in one piece using a casting process) (except where it is obviously impossible to use an integral molding process).

[0026] In addition, unless otherwise stated, the terms used in any of the technical solutions disclosed in this invention to indicate positional relationships or shapes include states or shapes that are similar to, close to, or approximate with those states or shapes.

[0027] Any component provided by this invention can be assembled from multiple individual components or can be a single component manufactured by a one-piece molding process.

[0028] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A construction method for an adjustable-size transformer substation foundation, characterized in that: The adjustable-size transformer substation foundation includes an open-top enclosure. The enclosure comprises a steel frame whose dimensions are adjustable in length, width, and height. The steel frame consists of an inner frame and an outer frame. Steel plates are inserted between the inner and outer frames at the bottom and around the perimeter of the enclosure. Both the inner and outer frames are welded from expandable steel pipes. Each expandable steel pipe consists of three sections: steel pipe A at both ends and steel pipe B in the middle. The cross-sectional dimension of steel pipe B is smaller than that of steel pipe A, and both ends of steel pipe B extend into steel pipe A. Limiting holes are spaced along the length of steel pipe B, and a through-hole is provided at the middle end of steel pipe A. Adjusting bolts for limiting holes; Construction method includes the following steps: (1) Making telescopic steel pipes; (2) Welding inner and outer frames using telescopic steel pipes; (3) Assembling inner and outer frames together to make a steel frame, with the inner and outer frames forming gaps at the bottom and around the steel frame for inserting steel plates; (4) Transporting the steel frame to the site and adjusting the length, width, and height of the steel frame to the required dimensions of the box-type substation according to the dimensions of the box-type substation; (5) Making steel plates according to the dimensions of the steel frame and inserting the steel plates into the gaps between the inner and outer frames around the bottom of the steel frame to form a box-type substation foundation.

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