Box transformer substation prefabricated steel platform structure and construction method thereof

Abstract

The invention relates to the technical field of photovoltaic power station construction, and provides a box transformer substation prefabricated steel platform structure and a construction method thereof.The box transformer substation prefabricated steel platform structure comprises a pile-column integrated foundation, platform beams, platform plates, platform fences, steel stairs, an oil storage device, a cable fixing support, a communication cabinet mounting support and a steel grating; the PHC prestressed pipe piles are fixedly connected to the outer surfaces of the platform beams, embedded parts are arranged at the ends, connected with the platform beams, of the PHC prestressed pipe piles, the platform beams are arranged at the top ends of the PHC prestressed pipe piles, and all component structures of the box transformer substation prefabricated steel platform structure system are assembled in advance on the flat ground. And welding assembly is not needed on site, so that the assembly construction difficulty is greatly reduced, and the construction period is greatly shortened. And meanwhile, a plurality of connecting points are connected through the hoops, so that follow-up updating and dismounting are facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic power station construction, and in particular to a prefabricated steel platform structure of a box-type transformer and a construction method thereof. Background Art

[0002] As a supporting platform for box-type transformer equipment, the box-type transformer platform is an important part of the power generation system. At present, the box-type transformer platform is mostly in the form of concrete structure, steel-concrete structure, steel structure, etc. As the proportion of photovoltaic power stations in the power generation field continues to increase. At the same time, the construction area conditions have also become diversified. The existing box-type transformer structure platform can no longer adapt to various terrain conditions, especially in special terrains such as large slopes and complex conditions. The existing box-type transformer platform structure is difficult to construct and the process is complicated, resulting in slow construction progress. It is also not conducive to subsequent updates and demolition.

[0003] The existing public patent number is: CN107858931A A prefabricated beam wet joint transverse partition variable space working platform and its manufacturing method, wherein the working platform is set at the joint position of two adjacent prefabricated beams, including a bottom plate structure, a protective structure and a connecting member; the bottom plate structure is horizontally set at the bottom of the working platform; the protective structure is set along the edge of the bottom plate structure, and together with the bottom plate structure, it forms a box-shaped structure with a bottom but no cover; the connecting members are respectively set on both sides of the top of the protective structure; the width of the two connecting members is less than the width of the wet joint to be constructed; the bottom edge of the connecting member is hingedly connected to the top edge of the protective structure, and the top edge of each connecting member passes through the gap of the embedded steel bars in the wet joint to be constructed and can be detachably connected to the fixed member above the top surface of the prefabricated beam. This invention solves the technical problems of the difficulty of setting up the lower temporary support, high construction cost, dangerous operation, low work efficiency and difficult to ensure construction quality in the traditional prefabricated beam joint construction.

[0004] CN111015063A discloses a prefabricated steel frame structure processing platform for assisting workpiece welding, comprising a first main body side, a second main body side and a support leg, the two ends of the first main body side are fixedly connected with the second main body side, and the connection between the second main body side and the first main body side is fixedly welded with a support leg, the outer side of the second main body side is installed with a positioning connecting rod, and the outer end of the positioning connecting rod is installed with a movable pull ring, the inner side of the second main body side is provided with an upper slot and a lower slide slot, and the lower slide slot is located below the upper slot, the side edges of the first movable plate and the second movable plate are provided with a fixed connection hole, and the interior of the fixed connection hole is connected with a positioning connecting rod, and sliding protrusions are fixedly arranged on both sides of the sliding support plate. The prefabricated steel frame structure processing platform for assisting workpiece welding can make the fixed steel frame structure in an overhead state, thereby facilitating the completion of the welding work of the steel frame structure and improving the welding work efficiency of the steel frame structure.

[0005] The above scheme solves the technical problems of difficulty in setting up temporary support for the lower part, high construction cost, dangerous operation, low work efficiency and difficulty in ensuring construction quality in traditional prefabricated beam joint construction. When in use, when used outdoors on a steep slope, the device will tilt at a large angle when providing support and cannot adapt to special ground, resulting in greater construction difficulty, reduced construction efficiency, and increased construction time for staff. The device is more troublesome to disassemble and install, and is difficult to disassemble, making it difficult to construct on special outdoor ground. Summary of the invention

[0006] The purpose of the present invention is to solve the existing problem that in special terrains such as steep slopes and complex conditions, the construction is difficult and the procedures are complicated, resulting in slow construction progress, which is not conducive to subsequent updating and demolition.

[0007] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a prefabricated steel platform structure of a box-type transformer and a construction method thereof, comprising: a foundation with piles and columns as one, a platform beam, a platform plate, a platform fence, a steel staircase, an oil storage device, a cable fixing bracket, a communication cabinet mounting bracket, and a steel grille. The foundation with piles and columns as one is a PHC prestressed pipe pile, which is fixedly connected to the outer surface of the platform beam, and an embedded part is arranged at one end of the PHC prestressed pipe pile connected to the platform beam. The platform beam is arranged at the top of the PHC prestressed pipe pile, and the platform beam is fixedly connected to the embedded part at the end of the pipe pile. A channel steel is fixedly connected to the lower surface of the platform beam, and a clamp is fixedly connected to the outer surface of the platform beam and the channel steel, one end of the channel steel is fixedly connected to the outer surface of the cantilevered steel beam close to one side, and the other end of the channel steel is fixedly connected to the outer surface of the PHC prestressed pipe pile through a clamp, and the steel grille is fixedly connected to the outer surface of the platform steel beam through an installation knot.

[0008] Preferably, a horizontal bar is provided inside the fence, and a vertical bar is provided inside the fence. The vertical bars are evenly arranged on the top of the outer surface of the platform beam, and one end of the vertical bar is welded to the outer surface of the horizontal bar.

[0009] Preferably, a guardrail door is provided inside the fence, two hinges are provided on the outer surface of the guardrail door on the side opposite to the fence, a door bolt is provided on the outer surface of the guardrail door on the side opposite to the fence, a steel staircase is provided on the outer surface of the fence, a pier is fixedly connected to the bottom of the outer surface of the steel staircase, a staircase steel beam is fixedly connected to the bottom of the outer surface of the steel staircase, a steel ladder fence is fixedly connected to the bottom of the outer surface of the steel staircase, and a step is fixedly connected to the bottom of the outer surface of the steel staircase.

[0010] Preferably, the steel ladder fence is evenly arranged on the outer surface of the stair steel beam, the steel ladder fence is fixedly connected to the top of the outer surface of the platform fence, embedded parts are buried inside the pier, and the pier is fixedly connected to the bottom of the outer surface of the stair steel beam.

[0011] Preferably, an oil pool bearing platform is provided inside the oil storage device, an accident oil pool is provided inside the oil storage device, an oil pool steel grating is provided inside the oil storage device, the oil bearing platform is assembled by splicing using I-beams, and the oil bearing platform is fixedly connected to the outer surface of the PHC prestressed pipe pile by a clamp.

[0012] Preferably, the material of the accident oil pool is a patterned steel plate, the outer side of the accident oil pool is reinforced with a ribbed steel plate, the accident oil is fixedly connected to the outer surface of the oil loading platform, the oil pool steel grille is installed on the top of the inner wall of the oil pool, the cable fixing bracket is provided with a supporting angle steel inside, and the cable fixing bracket is provided with a cable sleeve inside.

[0013] Preferably, the supporting angle steel is arranged directly below the cable inlet, the supporting angle steel is fixedly connected to the outer surface of the PHC prestressed pipe pile through a cable clamp, and the supporting angle steel is provided with a U-bolt connection port.

[0014] Preferably, the top of the cable sheath is aligned with the line inlet of the transformer box, the bottom of the outer surface of the cable sheath is fixed to the surface of the supporting angle steel by U-shaped bolts, the communication cabinet mounting bracket is fixedly connected to the outer surface of the communication cabinet, and the cold-bent channel steel is fixedly connected to the outer surface of the platform fence by U-shaped bolts.

[0015] S1. When in use, first locate and lay out the PHC prestressed pipe piles according to the coordinates of the positioning drawing. After the layout is completed, use machinery to carry out hole construction according to the corresponding points. The depth and radius of the hole can be two-thirds of the PHC prestressed pipe piles.

[0016] S2. When in use, after the hole is bored, use machinery to drive the PHC prestressed pipe piles. In the further step 2, when using machinery to drive the PHC prestressed pipe piles, control the depth of penetration and verticality.

[0017] S3. When in use, the structural bearing platforms of the oil pool components of the oil storage device, the patterned steel plates of the accident oil pool, the steel grating support angle steels, and the oil pool steel gratings can be assembled in advance in a processing plant that is convenient for construction.

[0018] S4. When in use, after the PHC prestressed pipe piles are pressed, the assembled oil storage device can be hoisted. During hoisting, the oil storage device is fixed on the PHC prestressed pipe piles using an oil pool clamp.

[0019] S5. When in use, first weld and assemble the steel beams of the oil pool bearing platform. After the steel beams of the oil pool bearing platform are assembled, splice the accident oil pool patterned steel plates one by one on the structure. After the splicing of the accident oil pool patterned steel plates is completed, weld the steel grating support angle steel inside it. After welding, use the installation knot to fix the oil pool steel grating on the steel grating support angle steel. After completion, transport it to the site for hoisting. If the site does not have the hoisting conditions, it can also be directly assembled on the PHC prestressed pipe piles according to the above process on site.

[0020] S6. When in use, the cold-bent channel steel is connected and fixed to the PHC prestressed pipe piles using cable clamps. After the subsequent cable is connected to the box-type transformer, the cable sleeve is fixed to the cold-bent channel steel using cable clamps. The platform steel beams, platform fences, steel grilles and steel stairs are assembled in a processing plant that is convenient for construction.

[0021] S7. When in use, the platform steel beams, platform fences, steel grilles and steel stairs are assembled and transported to the site for hoisting. After hoisting, the platform steel beams are welded and fixed to the embedded parts, and finally the steel stairs are welded and connected to the piers.

[0022] Compared with the prior art, the advantages and positive effects of the present invention are: 1. The platform beam of the present invention is an I-beam which can be assembled and welded in advance, and can be directly hoisted after assembly. The platform plate is a steel grille and is equipped with installation knots and M knots for fixed installation, and the platform fence is evenly arranged along the edge of the platform. The steel staircase has two stair steel beams, steps, and fences that are assembled in advance, and the piers connected to the ground are also prefabricated. The oil storage device is set below the oil drain port through the bearing platform, the cable fixing bracket, and the communication cabinet installation bracket.

[0023] 2. The present invention provides a prefabricated steel platform structural system for a box-type transformer. The PHC prestressed pipe piles are driven into the ground by a pile-driving machine. The end protruding from the ground is provided with embedded parts in advance and welded to the platform beam for installation. The platform beam, platform plate and railing can be assembled in advance and then hoisted and connected to the PHC prestressed pipe piles. The oil storage device can be assembled in advance and installed on the PHC prestressed pipe piles by clamps. There is no need to process the ground to make the oil storage structure. The steel stairs, cable fixing brackets and communication cabinet mounting brackets are also manufactured in advance and are respectively installed and fixed by welding and U-bolts. The various component structures of the prefabricated steel platform structural system of the box-type transformer are assembled in advance on the flat ground and only need to be transported to the site for splicing. The absence of on-site welding and assembly greatly reduces the difficulty of assembly construction and greatly saves the construction period. At the same time, multiple connection points are connected by clamps to facilitate subsequent updates and removals. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic side view of a prefabricated steel platform structure of a box-type transformer and a construction method thereof provided by the present invention; Figure 2 A schematic diagram of the planar structure of a prefabricated steel platform structure of a box-type transformer and a construction method thereof provided by the present invention; Figure 3 A schematic diagram of the basic structure of a prefabricated steel platform structure of a box-type transformer and a construction method thereof provided by the present invention; Figure 4 A schematic diagram of a cable fixing bracket structure of a prefabricated steel platform structure of a box-type transformer and a construction method thereof provided by the present invention; Figure 5 A schematic diagram of the plan structure of an oil storage device of a prefabricated steel platform structure of a box-type transformer and a construction method thereof provided by the present invention; Figure 6 A schematic diagram of the planed structure of an oil storage device of a prefabricated steel platform structure of a box-type transformer and a construction method thereof provided by the present invention; Figure 7 A schematic diagram of a communication cabinet mounting bracket structure of a prefabricated steel platform structure of a box-type transformer and a construction method thereof provided by the present invention.

[0025] Legend: 100. Embedded parts; 101. PHC prestressed pipe piles; 103. Steel ladder fence; 104. Pier; 105. Diagonal brace; 106. Diagonal brace clamp; 107. Steel grating; 108. Platform fence; 109. Platform steel beam; 120. Accident oil pool patterned steel plate; 121. Oil pool bearing platform steel beam; 122. Oil pool clamp; 123. Cable casing; 124. Support angle steel; 125. Cable clamp; 126. Ribbed steel plate; 127. Oil pool steel grating; 129. Steel grating support angle steel; 130. Cold-bent channel steel; 131. U-bolt. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figure 1-7, this embodiment provides a technical solution: a prefabricated steel platform structure of a box-type transformer and a construction method thereof, including: embedded parts 100 for connecting the platform beam with the PHC prestressed pipe pile; PHC prestressed pipe pile 101; steel ladder fence 103; pier 103 is provided with embedded parts for connecting the steel stairs; diagonal brace 105 supports the cantilevered part of the platform beam; diagonal brace hoop 106 is used to connect the diagonal brace with the PHC prestressed pipe pile 101; steel grille 107; platform fence 108; platform steel beam 109; The accident oil pool patterned steel plate 120 is used to assemble the accident oil pool; the oil pool bearing platform steel beam 121 is used to bear the accident oil pool; the oil pool clamp 122 is used to connect the oil pool bearing platform steel beam with the PHC prestressed pipe pile; the cable sleeve 123; the support angle steel 124; the cable clamp 125 fixes the cable sleeve; the ribbed steel plate 126; the oil pool steel grille 127; the steel grille support angle steel 129; the cold-bent channel steel 130; the U-shaped bolt 131, and the column-integrated foundation is the PHC prestressed pipe pile 101, such as Figure 3 The PHC prestressed pipe pile 101 shown is a cylindrical prefabricated pipe pile, and a circular embedded part 100 of the same diameter is installed in advance at one end of the pipe pile. The size of the PHC prestressed pipe pile 101 is determined by the design, and 6 PHC prestressed pipe piles 101 can be used as vertical load-bearing components. When connected with the platform steel beam 109, the box-type transformer platform forms a stable framework system. The PHC prestressed pipe pile 101 is positioned and laid out according to the coordinates of the positioning drawing. After the laying out is completed, the machine is used to carry out the boring construction according to the corresponding points. The boring depth and radius can be carried out according to two-thirds of the PHC prestressed pipe pile 101. After the boring is completed, the machine is used to carry out the pile pressing construction on the PHC prestressed pipe pile 101.

[0028] like Figure 1-7 As shown, PHC prestressed pipe piles can replace cast-in-place piles, and the steel ladder fence 103 and the platform fence 108 are as shown in FIG. Figure 1 The figure shows a circular tube, which is divided into two forms: horizontal tube and vertical tube, which are evenly arranged along the platform steel beam 109. The steel tubes and the steel tubes and the steel beams are connected by welding. The platform steel beam 109, the platform fence 108, the steel grille 107 and the steel stairs are assembled in a processing plant that is convenient for construction. After the platform steel beam 109, the platform fence 108, the steel grille 107 and the steel stairs are assembled, they are transported to the site for hoisting. After the hoisting is completed, the platform steel beam 109 and the embedded parts 100 are welded and fixed.

[0029] like Figure 1-7 As shown, the steel ladder fence 103 and the platform fence 108 are made of stainless steel, and the fence 103 and the platform fence 108 can be square tubes, and the material can be galvanized. It can be adjusted according to actual conditions and has a wide range of applications.

[0030] like Figure 1-7 As shown, the buttress 103 is as shown in Figure 1As shown, the trapezoidal top embedded steel plate is connected to the steel ladder beam. The size of the pier 103 can be square or round. The platform steel beam 109 is an I-beam, which is assembled by welding and has a fast installation speed.

[0031] like Figure 1-7 As shown, the platform steel beam 109 can be connected with bolts, the platform plate can be adjusted according to the actual patterned steel plate, the platform steel beam 109 and the embedded parts 100 are welded and fixed, and the steel staircase and the pier 104 are welded and connected.

[0032] like Figure 1-7 As shown, the accident oil pool is assembled from patterned steel plates 120, and the glass fiber reinforced plastic material can be selected according to actual conditions, which is relatively strong.

[0033] A construction method for a prefabricated steel platform of a box-type transformer: S1. When in use, firstly, the PHC prestressed pipe pile 101 is positioned and laid out according to the coordinates of the positioning drawing. After the laying out is completed, a machine is used to carry out the drilling construction according to the corresponding points. The drilling depth and radius can be carried out according to two-thirds of the PHC prestressed pipe pile 101.

[0034] S2. When in use, after the hole is bored, the PHC prestressed pipe pile 101 is pressed by a machine. In the further step 2, when the PHC prestressed pipe pile 101 is pressed by a machine, the depth of penetration and verticality are well controlled.

[0035] S3. When in use, the structural bearing platform 121 of each component of the oil pool of the oil storage device, the patterned steel plate 120 of the accident oil pool, the steel grille supporting angle steel 129, and the oil pool steel grille 127 can be assembled in advance in a processing plant that is convenient for construction.

[0036] S4. When in use, after the PHC prestressed pipe pile 101 is pressed, the assembled oil storage device can be hoisted. During the hoisting, the oil pool clamp 122 is used to fix the oil storage device on the PHC prestressed pipe pile 101.

[0037] S5. When in use, first weld and assemble the oil pool bearing platform steel beam 121. After the oil pool bearing platform steel beam 121 is assembled, the accident oil pool patterned steel plates 120 are spliced ​​one by one on the structure. After the accident oil pool patterned steel plates 120 are spliced, the steel grating support angle steel 129 is welded inside. After welding, the oil pool steel grating 127 is fixed on the steel grating support angle steel 129 using the installation knot. After completion, it is transported to the site for hoisting. If the site does not have the hoisting conditions, it can also be directly assembled on the PHC prestressed pipe pile 101 according to the above process on site.

[0038] S6. When in use, the cold-bent channel steel 130 is connected and fixed to the PHC prestressed pipe pile 101 using a cable clamp; after the subsequent cable is connected to the box-type transformer, the cable sleeve 123 is fixed to the cold-bent channel steel 130 using a cable clamp 125, and the platform steel beam 109, platform fence 108, steel grille 107 and steel stairs are assembled in a processing plant that is convenient for construction.

[0039] S7. When in use, the platform steel beam 109, platform fence 108, steel grille 107 and steel stairs are assembled and transported to the site for hoisting. After the hoisting is completed, the platform steel beam 109 and the embedded parts 100 are welded and fixed, and finally the steel stairs and the pier 104 are welded and connected.

[0040] Working principle: First, the PHC prestressed pipe pile 101 is positioned and laid out according to the coordinates of the positioning drawing. After the laying out is completed, the machine is used to carry out the boring construction according to the corresponding points. The boring depth and radius can be carried out according to two-thirds of the PHC prestressed pipe pile 101. After the boring is completed, the PHC prestressed pipe pile 101 is pressed by the machine. When the machine is used to press the PHC prestressed pipe pile 101, the depth of soil and verticality should be well controlled. The structural bearing platform 121 of each component of the oil storage device oil pool and the accident oil pool patterned steel plate 120, steel grille support angle steel 129, and oil pool steel grille 127 can be prepared in advance at a processing plant that is convenient for construction. After the assembly is completed and the PHC prestressed pipe pile 101 is pressed, the assembled oil storage device can be hoisted. During the hoisting, the oil storage device is fixed on the PHC prestressed pipe pile 101 using an oil pool clamp 122. In the further step 4, the oil pool bearing platform steel beam 121 is first welded and assembled. After the oil pool bearing platform steel beam 121 is assembled, the accident oil pool patterned steel plates 120 are spliced ​​one by one on the structure. After the accident oil pool patterned steel plates 120 are spliced, the steel grating support angle steel 129 is welded inside it. After the welding is completed, the oil pool steel grating 127 is fixed on the steel grating support angle steel 129 using an installation knot. After completion, it is transported to the site for hoisting. If the conditions for hoisting are not available on site, the above-mentioned procedures can also be used to assemble the steel bars directly on the PHC prestressed pipe pile 101 on site. The cold-bent channel steel 130 is connected and fixed to the PHC prestressed pipe pile 101 using a cable clamp. After the subsequent cable is connected to the box-type transformer, the cable sleeve 123 is fixed to the cold-bent channel steel 130 using a cable clamp 125. The platform steel beam 109, platform fence 108, steel grille 107 and steel stairs are assembled in a processing plant that is convenient for construction. After the platform steel beam 109, platform fence 108, steel grille 107 and steel stairs are assembled, they are transported to the site for hoisting. After the hoisting is completed, the platform steel beam 109 is welded and fixed to the embedded part 100, and the steel staircase is welded to the pier 104.

[0041] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A prefabricated steel platform structure for a box-type transformer, characterized in that: include: A pile-column integrated foundation, a platform beam, a platform plate, a platform fence, a steel staircase, an oil storage device, a cable fixing bracket, a communication cabinet mounting bracket, and a steel grille. The pile-column integrated foundation is a PHC prestressed pipe pile, which is fixedly connected to the outer surface of the platform beam, and an embedded part is arranged at one end of the PHC prestressed pipe pile connected to the platform beam. The platform beam is arranged at the top of the PHC prestressed pipe pile, and the platform beam is fixedly connected to the embedded part at the end of the pipe pile. A channel steel is fixedly connected to the lower surface of the platform beam, and a clamp is fixedly connected to the outer surface of the platform beam and the channel steel, one end of the channel steel is fixedly connected to the outer surface of the cantilevered steel beam close to one side, and the other end of the channel steel is fixedly connected to the outer surface of the PHC prestressed pipe pile through a clamp, and the steel grille is fixedly connected to the outer surface of the platform steel beam through an installation knot.

2. The prefabricated steel platform structure of a box-type transformer according to claim 1 is characterized in that: A cross bar is arranged inside the fence, and a vertical bar is arranged inside the fence. The vertical bars are evenly arranged on the top of the outer surface of the platform beam, and one end of the vertical bar is welded to the outer surface of the cross bar.

3. The prefabricated steel platform structure of a box-type transformer according to claim 2 is characterized in that: A guardrail door is arranged inside the fence, two hinges are arranged on the outer surface of the guardrail door on the side opposite to the fence, a door bolt is arranged on the outer surface of the guardrail door on the side opposite to the fence, a steel staircase is arranged on the outer surface of the fence, a pier is fixedly connected to the bottom of the outer surface of the steel staircase, a staircase steel beam is fixedly connected to the bottom of the outer surface of the steel staircase, a steel ladder fence is fixedly connected to the bottom of the outer surface of the steel staircase, and a step is fixedly connected to the bottom of the outer surface of the steel staircase.

4. The prefabricated steel platform structure of a box-type transformer according to claim 3 is characterized by: The steel ladder fence is evenly arranged on the outer surface of the stair steel beam, the steel ladder fence is fixedly connected to the top of the outer surface of the platform fence, embedded parts are buried inside the pier, and the pier is fixedly connected to the bottom of the outer surface of the stair steel beam.

5. The prefabricated steel platform structure of a box-type transformer according to claim 4 is characterized in that: An oil pool bearing platform is arranged inside the oil storage device, an accident oil pool is arranged inside the oil storage device, an oil pool steel grid is arranged inside the oil storage device, the oil carrying platform is assembled by splicing with I-beams, and the oil carrying platform is fixedly connected to the outer surface of the PHC prestressed pipe pile by a clamp.

6. The prefabricated steel platform structure of a box-type transformer according to claim 5 is characterized in that: The material of the accident oil pool is a patterned steel plate, the outer side of the accident oil pool is reinforced with a ribbed steel plate, the accident oil is fixedly connected to the outer surface of the oil loading platform, the oil pool steel grille is installed on the top of the inner wall of the oil pool, the cable fixing bracket is provided with a supporting angle steel inside, and the cable fixing bracket is provided with a cable sleeve inside.

7. The prefabricated steel platform structure of a box-type transformer according to claim 6 is characterized by: The support angle steel is arranged directly below the cable inlet, and the support angle steel is fixedly connected to the outer surface of the PHC prestressed pipe pile through a cable clamp, and the support angle steel is provided with a U-bolt connection port.

8. The prefabricated steel platform structure of a box-type transformer according to claim 7 is characterized in that: The top of the cable sheath is aligned with the line inlet of the transformer box, the bottom of the outer surface of the cable sheath is fixed to the surface of the supporting angle steel by U-shaped bolts, the communication cabinet mounting bracket is fixedly connected to the outer surface of the communication cabinet, and the cold-bent channel steel is fixedly connected to the outer surface of the platform fence by U-shaped bolts.

9. A construction method for a prefabricated steel platform of a box-type transformer, characterized in that: A prefabricated steel platform structure for a box-type transformer as claimed in any one of claims 1 to 8 is used, comprising the following steps: S1. When in use, firstly, the PHC prestressed pipe piles are positioned and laid out according to the coordinates of the positioning drawing. After the laying out is completed, the drilling is carried out mechanically according to the corresponding points. The drilling depth and radius can be carried out according to two-thirds of the PHC prestressed pipe piles; S2, when in use, after the hole is completed, use machinery to press the PHC prestressed pipe piles; in the further step 2, when using machinery to press the PHC prestressed pipe piles, control the depth of burial and verticality; S3. When in use, the structural bearing platform of each component of the oil storage device oil pool, the patterned steel plate of the accident oil pool, the steel grille support angle steel, and the oil pool steel grille can be assembled in advance in a processing plant that is convenient for construction; S4. When in use, after the PHC prestressed pipe piles are pressed, the assembled oil storage device can be hoisted. During hoisting, the oil storage device is fixed on the PHC prestressed pipe piles using an oil pool clamp; S5. When in use, first weld and assemble the steel beams of the oil pool bearing platform. After the steel beams of the oil pool bearing platform are assembled, splice the accident oil pool patterned steel plates one by one on top of the structure. After the splicing of the accident oil pool patterned steel plates is completed, weld the steel grating support angle steel inside it. After welding, use the installation knot to fix the oil pool steel grating on the steel grating support angle steel. After completion, transport it to the site for hoisting. If the site does not have the hoisting conditions, it can also be directly assembled on the PHC prestressed pipe piles according to the above process on site; S6. When in use, the cold-bent channel steel is connected and fixed with the PHC prestressed pipe pile using a cable clamp. After the subsequent cable is connected to the box-type transformer, the cable sleeve is fixed on the cold-bent channel steel using a cable clamp. The platform steel beam, platform fence, steel grille and steel stairs are assembled in a processing plant that is convenient for construction. S7. When in use, the platform steel beams, platform fences, steel grilles and steel stairs are assembled and transported to the site for hoisting. After hoisting, the platform steel beams are welded and fixed to the embedded parts, and finally the steel stairs are welded and connected to the piers.

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