Fabricated main transformer foundation and assembling method

Abstract

The invention belongs to the technical field of power transformation equipment foundations, and discloses an assembly type main transformer foundation and an assembly method.The assembly type main transformer foundation comprises opposite prefabricated foundation plates, and the two prefabricated foundation plates are connected through a rigid assembly and an energy dissipation assembly; the energy dissipation assembly comprises extrusion rods vertically embedded in the opposite faces of the prefabricated foundation plate, first cylinders are fixed to the two sides of the ends, away from the prefabricated foundation plate, of the extrusion rods, and a plurality of circumferentially-formed broken line grooves are evenly formed in the free end faces of the first cylinders. The end of the extrusion rod is connected between the two extrusion plates, the sides, facing the extrusion rod, of the extrusion plates are fixedly connected with a second cylinder, and the free end face of the second cylinder is also provided with a plurality of fold line grooves. After the fold line groove of the first cylinder is meshed and butted with the fold line groove of the second cylinder, the rotating shaft penetrates through the first cylinder and the second cylinder, two ends of the rotating shaft are fixedly connected with rotating shaft covers, and a plurality of disc springs sleeve the rotating shaft between the rotating shaft covers and the extrusion plate. The method has the effect of improving the damage resistance of the main transformer foundation under the extreme load.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of power transformation equipment, and particularly relates to an assembled main transformer foundation and an assembling method. BACKGROUND

[0002] The statements in this section merely provide background information related to the present application and do not necessarily constitute prior art.

[0003] In power plants and transformer substations, the transformer used to deliver power to the power system or users is called a main transformer, which is abbreviated as a main transformer. In the traditional construction mode, the main transformer foundation is a cast-in-place reinforced concrete foundation, which has the problems of long construction period and easy corrosion of steel reinforcement materials accumulated on site.

[0004] To solve the above technical problems, the prior art discloses an assembled main transformer foundation, which comprises a base, a plurality of pier foundations fixedly connected to the base, and the base is spliced by a plurality of prefabricated rectangular bottom plates, the adjacent two bottom plates are spliced by one on top of the other through a rebate, and are connected through bolts; one side of the adjacent two bottom plates from one side to the opposite side is provided with a through prestressed tensioning hole perpendicular to the side where the rebate is located, and the through core steel strand penetrates through the adjacent two bottom plates from the prestressed tensioning hole, and the through core steel strand is prestressed and tensioned through the anchor ring at both ends.

[0005] The above scheme solves the technical problem of long construction period of the main transformer foundation on site, but still has the following defects: The two prefabricated bottom plates of the above scheme are connected through the rebate one on top of the other, which facilitates positioning and alignment, but does not consider the trend of reciprocating relative displacement of the two prefabricated bottom plates under the action of earthquake, which leads to the fact that the rebate of the two prefabricated bottom plates is squeezed and damaged due to the trend of relative up-down displacement under the action of vertical earthquake force, and the bolts connected between the rebates are also fractured and damaged due to the relative horizontal movement under the action of horizontal earthquake force, which cannot dissipate energy during the earthquake process. SUMMARY

[0006] Therefore, the purpose of the present application is to provide an assembled main transformer foundation and an assembling method, which can solve the technical problems of the existing art that the assembled main transformer foundation cannot dissipate energy during the earthquake process and is difficult to repair after the earthquake.

[0007] To achieve the above purpose, the present application adopts the following technical scheme: In a first aspect, an assembled main transformer foundation is provided, comprising two opposite prefabricated foundation plates, and the two prefabricated foundation plates are connected through a rigid component and an energy dissipation component. The energy dissipation assembly comprises extruded rods vertically embedded on opposite sides of the prefabricated foundation plates, coaxial first cylinders fixedly connected on both sides of the ends of the extruded rods away from the prefabricated foundation plates, and a plurality of circumferentially arranged fold line grooves uniformly arranged on the free end faces of the first cylinders; the extruded rods are connected between two extruded plates, the second cylinders are fixedly connected to the sides of the extruded plates facing the extruded rods, and a plurality of fold line grooves are also arranged on the free end faces of the second cylinders. After the fold line grooves of the first cylinders and the fold line grooves of the second cylinders are engaged and docked, the shaft is penetrated through the first cylinders and the second cylinders, the shaft covers are fixedly connected to both ends of the shaft, and a plurality of disc springs are installed on the shaft between the shaft covers and the extruded plates.

[0008] Preferably, the two ends of the two prefabricated foundation plates on opposite sides are connected through the rigid assembly, and the middle part is connected through a plurality of uniformly distributed energy dissipation assemblies.

[0009] Preferably, the rigid assembly comprises two first connecting pieces, the first flanges of the first connecting pieces are fixedly connected to the prefabricated foundation plates, and the second flanges are relatively buckled and connected.

[0010] Preferably, a clamping groove is arranged in the middle part of the second flange, a clamping plate is fixedly connected to the clamping groove at a position corresponding to the web of the first connecting piece, and a first reinforcing plate is fixedly connected between the clamping plate and the web.

[0011] Preferably, a plurality of uniformly distributed second reinforcing plates are fixedly connected between the web and the first flange.

[0012] Preferably, a plurality of first connecting holes are arranged on the first flange, and a plurality of bolts embedded in the side surface of the prefabricated foundation plate are fixedly connected.

[0013] Preferably, the rigid assembly further comprises a second connecting piece installed above the two first connecting pieces; the second connecting piece is fixedly connected to the bolts connected to the upward flanges of the first connecting pieces.

[0014] Preferably, the second connecting piece comprises a vertical plate and a frame body, the vertical plate is fixedly connected to the frame body perpendicularly, a plurality of second connecting holes are arranged on the vertical plate, and the second connecting holes are connected by embedded bolts; the bottom of the frame body is fixedly welded to the top surface of the web of the downward first connecting piece of the flange.

[0015] Preferably, a plurality of reinforcing rods are fixedly arranged in the frame body, and a plurality of third reinforcing plates are fixedly arranged at the included angles of the frame body.

[0016] In the second aspect, a method for assembling the prefabricated main transformer foundation is provided, and the specific steps comprise: Two prefabricated foundation plates are respectively hoisted at the designed positions; The first connecting pieces are installed between the two prefabricated foundation plates, then the second connecting piece is installed above the two first connecting pieces, and the second connecting piece is fixedly welded to the web of the downward first connecting piece of the flange. Next, the extrusion plates are installed on both sides of the extrusion rod, and the rotating shafts are inserted into both ends of the extrusion plates and the extrusion rod. Disc springs are then fitted onto the rotating shafts, and finally, rotating shaft covers are fixedly connected to both ends of the rotating shafts.

[0017] Compared with the prior art, the advantages and positive effects of this invention are: In this invention, two precast foundation slabs are connected by an energy-dissipating component and a rigid component. The extrusion rod and extrusion plate of the energy-dissipating component form a limiting hinge, allowing the energy-dissipating component to limit the relative horizontal movement of the two precast foundation slabs while also enabling rotation. When the two precast foundation slabs experience relative vertical displacement under seismic action, the extrusion rod will rotate relative to the extrusion plate, causing the first cylinder to rotate relative to the second cylinder. The inclined surface of the folded groove of the first cylinder will slide along the inclined surface of the folded groove of the second cylinder, forcing the extrusion plate to move along the axial direction of the rotating shaft towards the rotating shaft cover, thereby compressing the disc spring and achieving energy dissipation. This prevents the precast foundation slabs from brittle failure due to directly bearing excessive stress, and improves the damage resistance of the main transformer foundation under extreme loads. Attached Figure Description

[0018] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0019] Figure 1 This is a perspective view of a prefabricated main transformer foundation according to Embodiment 1 or Embodiment 2 of the present invention; Figure 2 This is a perspective view of the prefabricated base plate of Embodiment 1 or Embodiment 2 of the present invention; Figure 3 This is a perspective view of multiple energy-consuming components connected between prefabricated base plates according to Embodiment 1 or Embodiment 2 of the present invention; Figure 4 This is a perspective view of the energy-consuming component of Embodiment 1 or Embodiment 2 of the present invention; Figure 5 This is a perspective view of the extrusion rod of Embodiment 1 or Embodiment 2 of the present invention; Figure 6 This is a perspective view of the extrusion plate of Embodiment 1 or Embodiment 2 of the present invention; Figure 7 This is a front view of a prefabricated main transformer foundation according to Embodiment 1 or Embodiment 2 of the present invention; Figure 8 This is a front perspective view of the first connector in Embodiment 1 or Embodiment 2 of the present invention; Figure 9 This is a perspective view of the back of the first connector in Embodiment 1 or Embodiment 2 of the present invention; Figure 10This is a top view of the first connecting member in Embodiment 1 or Embodiment 2 of the present invention; Figure 11 This is a side view of the first connector in Embodiment 1 or Embodiment 2 of the present invention; Figure 12 This is a front view of the second connector in Embodiment 1 or Embodiment 2 of the present invention; Figure 13 This is a bottom view of the second connector in Embodiment 1 or Embodiment 2 of the present invention; Figure 14 This is a side view of the second connector in Embodiment 1 or Embodiment 2 of the present invention; In the picture: 1. Precast foundation slab; 11. Bolt; 12. Pier column; 2. Joint; 3. Energy dissipation component; 31. Extrusion rod; 32. First cylinder; 33. Folded groove; 34. Extrusion plate; 35. Second cylinder; 36. Shaft cover; 37. Disc spring; 4. Rigid component; 41. First connector; 411. First flange; 412. Second flange; 413. Web plate; 414. Slot; 415. Plate; 416. First reinforcing plate; 417. Second reinforcing plate; 418. First connecting hole; 42. Second connector; 421. Vertical plate; 422. Frame; 423. Second connecting hole; 424. Reinforcing rod; 425. Third reinforcing plate. Detailed Implementation

[0020] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. 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 invention pertains.

[0021] The present invention will now be described in detail with reference to the accompanying drawings.

[0022] Example 1 This embodiment discloses a prefabricated main transformer foundation, such as Figure 1 As shown, the system includes two opposing precast base slabs 1, with a pre-existing joint 2 between them. Within the joint 2, the two precast base slabs 1 are connected by an energy-dissipating component 3 and a rigid component 4. Figure 1 As shown, the energy-dissipating component 3 and the rigid component 4 are arranged laterally along the seam.

[0023] like Figures 2 to 5 As shown, the energy-consuming component 3 includes an extrusion rod 31 vertically embedded on one side of two precast foundation plates 1. The two ends of the extrusion rod 31 away from the precast foundation plate 1 are fixedly connected to a coaxial first cylinder 32. Several zigzag grooves 33 are evenly opened on the free end face of the first cylinder 32 away from the precast foundation plate 1, arranged circumferentially along the first cylinder 32.

[0024] It should be noted that the broken line groove is a nonlinear groove structure on the end face of the first cylinder, and in the embodiment, the broken line groove is a V-shaped groove.

[0025] As shown in Figure 3 , Figure 4 , Figure 6 shown, the energy dissipation assembly 3 further comprises two extrusion plates 34 on both sides of the extrusion rod 31, the two ends of the two extrusion plates 34 are respectively rotationally connected with the extrusion rod 31 of the two prefabricated foundation plates 1, and the side of the extrusion plate 34 opposite to the extrusion rod 31 is fixedly connected with a second cylinder 35, and a plurality of broken line grooves 33 are also arranged on the end face of the second cylinder 35 in the circumferential direction of the second cylinder.

[0026] It should be noted that the number of the broken line grooves 33 of the first cylinder 32 and the broken line grooves 33 of the second cylinder 35 are equal, but are staggered, and after the broken line grooves 33 of the first cylinder 32 and the broken line grooves 33 of the second cylinder 35 are engaged and connected, the extrusion rod 31 and the extrusion plate 34 are parallel to the ground. In the embodiment, the staggering of the broken line grooves 33 can be realized by offsetting one broken line groove in the circumferential direction, to ensure that the grooves of the two cylinders can be closely matched in the initial state, so that the extrusion rod 31 and the extrusion plate 34 are parallel to the ground.

[0027] As shown in Figure 3 , Figure 4 shown, the energy dissipation assembly 3 further comprises a rotating shaft, the rotating shaft passes through the first cylinder 32 and the second cylinder 35 to realize the rotational connection between the extrusion plate 34 and the extrusion rod 31, the two ends of the rotating shaft are fixedly connected with a rotating shaft cover 36, and a plurality of disc springs 37 are sleeved and arranged on the rotating shaft between the rotating shaft cover 36 and the extrusion plate 34. In the embodiment, the rotating shaft cover 36 is fixed at the two ends of the rotating shaft to limit the axial movement of the rotating shaft and provide support or limiting for the disc springs 37; the disc spring is an elastic element with a tapered cross section, which can store and release energy when subjected to pressure, and can provide restoring force in the energy dissipation assembly 3.

[0028] It can be understood that in the embodiment, the extrusion rod 31 and the extrusion plate 34 form a limiting hinge, allowing the energy dissipation assembly 3 to have the ability to rotate while limiting the relative movement of the two prefabricated foundation plates 1 in the horizontal direction. When the two prefabricated foundation plates 1 produce a relative upward and downward displacement trend under the action of an earthquake, the extrusion rod 31 will rotate relative to the extrusion plate 34, that is, the first cylinder 32 will rotate relative to the second cylinder 35, and since the broken line grooves 33 on the first cylinder 32 and the second cylinder 35 are engaged with each other, the inclined surface of the broken line groove 33 of the first cylinder 32 will slide along the inclined surface of the broken line groove 33 of the second cylinder 35, forcing the extrusion plate 34 to move along the axial direction of the rotating shaft and move towards the rotating shaft cover 36 to compress the disc springs 37, thereby realizing energy dissipation and avoiding brittle failure of the prefabricated foundation plate 1 due to direct bearing of excessive stress.

[0029] It can also be understood that when the seismic load is reduced or disappears, the compressed disc spring 37 will release the stored elastic potential energy to provide a restoring force to push the extrusion plate 34 and the extrusion rod 31 back to the initial position parallel to the ground, realizing the resetting of the energy dissipation assembly 3. Thus, the entire assembled main transformer foundation can still maintain its structural integrity and functionality after experiencing an earthquake.

[0030] It can be understood that the existing assembled main transformer foundation adopts upper and lower notched connection and bolt connection, which is prone to notched extrusion damage and bolt fracture under the reciprocating relative displacement under the action of earthquake, and lacks effective energy dissipation and resetting mechanism. The embodiment reserves a joint between the prefabricated foundation plates 1 and installs the energy dissipation assembly 3, which converts the relative upward and downward displacement trend of the prefabricated foundation plates 1 into extrusion of the disc spring 37 through the extrusion rod 31, the extrusion plate 34, the first cylinder 32, the second cylinder 35, and the fold line groove 33 on the cylinder, thereby realizing energy dissipation, effectively avoiding stress concentration, and improving the damage resistance of the foundation under extreme load.

[0031] As shown in Figure 1 , along the longitudinal direction of the joint 2, the two ends of the opposite side of the prefabricated foundation plate 1 are connected by the rigid assembly 4, and the middle part of the opposite side of the prefabricated foundation plate is connected by a plurality of energy dissipation assemblies 3. It can be understood that the rigid assembly 4 connected between the two prefabricated foundation plates 1 provides stiffness and constraint to prevent the two prefabricated foundation plates 1 from excessive relative displacement or separation at the joint 2, thereby ensuring the overall structural integrity of the foundation. A plurality of energy dissipation assemblies 3 connected between the two prefabricated foundation plates provide uniform energy dissipation capacity to reduce stress concentration.

[0032] It should be noted that the rigid assembly 4 at both ends provides stiffness and constraint to limit the relative displacement of the prefabricated foundation plate 1 at the joint 2; the plurality of energy dissipation assemblies 3 in the middle region convert the differential displacement of the two prefabricated foundation plates 1 into controllable deformation and energy dissipation through the cooperative work of the extrusion rod, the extrusion plate, the first cylinder, the second cylinder, the fold line groove, and the disc spring. The two prefabricated foundation plates 1 have sufficient stiffness to resist separation and excessive deformation as a whole, and can also absorb and release stress through the energy dissipation assembly.

[0033] When the prefabricated foundation plate 1 has a relative upward and downward displacement trend, the energy dissipation assembly in the middle region converts rotation into axial movement through the fold line groove 33 of the two cylinders, so that the extrusion plate 34 extrudes the disc spring 37, converting displacement into energy dissipation, and the rigid assembly 4 at both ends provides the necessary constraint to jointly maintain the overall stability of the two prefabricated foundation plates 1, thereby improving the structural safety and durability of the assembled main transformer foundation.

[0034] As shown in Figure 1 , Figure 7As shown, the rigid component 4 includes two first connecting pieces 41, which are respectively fixedly connected with the two prefabricated foundation plates 1; in the embodiment, the first connecting piece 41 is a channel steel, and the two first connecting pieces 41 are connected with the prefabricated foundation plates 1 by means of welding. Figure 7 As shown, the first flange 411 of the two first connecting pieces 41 is fixedly connected with the prefabricated foundation plate 1, and the second flange 412 is relatively buckled and connected, so as to avoid separation of the two prefabricated foundation plates 1 along the transverse direction of the joint 2. Specifically, the flange of one first connecting piece 41 faces upward, and the flange of the other first connecting piece 41 faces downward.

[0035] It should be further noted that, due to the heavy weight and volume, the two prefabricated foundation plates 1 are hoisted to the designed position in sequence, and then the energy dissipation component 3 and the rigid component 4 are connected between the two prefabricated foundation plates 1; the relative buckling mode of the two first connecting pieces 41 of the rigid component 4 can facilitate the operation during connection.

[0036] As shown in Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 As shown, the second flange 412 is lower than the first flange 411 in height, and specifically, as shown in Figure 8 the second flange 412 is lower than the first flange 411 in height by the thickness of a web 413, so as to ensure that the top surfaces of the two first connecting pieces 41 are flush after connection. In the embodiment, as shown in Figure 9 , Figure 10 the middle part of the second flange 412 is provided with a clamping groove 414, the web 413 of the first connecting piece 41 is fixedly connected with a clamping plate 415 at the position corresponding to the clamping groove 414, and the first reinforcing plate 416 is fixedly connected between the clamping plate 415 and the web 413; when the second flanges 412 of the two first connecting pieces are buckled with each other, the clamping groove 414 and the clamping plate 415 on the two first connecting pieces 41 are clamped with each other.

[0037] It can be understood that the middle part of the second flange 412 is provided with the clamping groove 414, which is a groove structure for cooperating with the clamping plate 415 to realize mechanical locking between the two first connecting pieces 41. The first reinforcing plate 416 is fixedly connected between the clamping plate 415 and the web 413, and the first reinforcing plate 416 is used to enhance the strength and rigidity of the connection between the clamping plate 415 and the web 413, effectively disperse the stress that the clamping plate may bear during clamping, prevent deformation or damage of the connection part, improve the overall rigidity and stability of the connection of the rigid component 4, and ensure the reliability of the connection between the prefabricated foundation plates 1.

[0038] As shown in Figure 9 , Figure 10 , Figure 11As shown, a plurality of second reinforcing plates 417 are fixedly connected between the first flange 411 and the web 413. The plurality of second reinforcing plates 417 are used to enhance the local strength, rigidity or stability of the first connecting piece 41, to disperse stress, and to improve the shear resistance, bending resistance or local buckling resistance of the first connecting piece 41.

[0039] It can be understood that when the prefabricated foundation plates 1 are relatively separated, the separation load is transmitted to the web 413 through the first flange 411, and the junction between the first flange 411 and the web 413 is a key area for stress transmission. If the strength of this area is insufficient, stress concentration may occur, leading to local deformation or even failure. By arranging a plurality of second reinforcing plates 417, the strength of the junction between the first flange and the web is increased, and the stress transmission path is changed, so that the concentrated stress is dispersed to a larger area, ensuring that the first connecting piece 41 can stably and reliably connect the prefabricated foundation plates 1.

[0040] The first reinforcing plate and the second reinforcing plate can be triangular or trapezoidal. In this embodiment, the first reinforcing plate and the second reinforcing plate are both triangular reinforcing plates, and the material of the reinforcing plates is the same steel as the body of the channel steel. The thickness of the reinforcing plates can be determined according to the actual stress condition and design requirements, and is generally similar to the thickness of the web of the channel steel. The first reinforcing plate and the second reinforcing plate are arranged uniformly along the length direction of the first connecting piece.

[0041] As shown in Figure 8 , Figure 9 , a plurality of first connecting holes 418 are formed in the first flange 411, which are used to fixedly connect with a plurality of pre-buried bolts 11 on the side surface of the prefabricated foundation plate 1. The pre-buried bolt 11 refers to a bolt that is placed inside the concrete before the prefabricated foundation plate 1 is cast and formed. A part of the thread of the bolt protrudes from the surface of the concrete, which is used for subsequent connection with the first flange 411. In this embodiment, the plurality of first connecting holes 418 and the plurality of pre-buried bolts 11 on the side surface of the prefabricated foundation plate are arranged in an array.

[0042] It can be understood that by using this detachable connection method, the installation process on site can be simplified. After the action of an earthquake, the energy dissipation component 3 can be reset by the action of the disc spring 37, and the rigid component 4 may be damaged. By using this bolt detachable connection, the damaged first connecting piece 41 can be detached and replaced.

[0043] In actual application, when the two prefabricated foundation plates 1 tend to rotate relative to each other, the two first connecting pieces 41 also tend to rotate relative to each other, which may cause the two first connecting pieces 41 to have a relative vertical displacement trend. In this regard, Figure 1 , Figure 7As shown, the rigid assembly 4 of the embodiment further comprises a second connecting member 42 installed above the two first connecting members 41; the second connecting member 42 is fixedly connected with the bolt 11 connecting the first connecting member 41 with the flange facing upward; the second connecting member 42 is used to limit the upward movement of the first connecting member 41, and to ensure the rigidity connection of the two precast foundation plates 1 in the height direction along the joint 2.

[0044] It can be understood that, by covering the second connecting member 42 above the two first connecting members 41, when the two precast foundation plates 1 have a tendency to rotate relative to each other, the second connecting member 42 can prevent the upward movement of the first connecting member 41 with the flange facing downward, thereby enhancing the integrity and stability of the connection between the precast foundation plates 1. This can enable the main transformer foundation to maintain higher overall stability and flatness when subjected to complex loads, thereby improving the reliability and durability of the main transformer foundation.

[0045] As shown in Figure 12 , Figure 13 , Figure 14 , the second connecting member 42 comprises a vertical plate 421 and a frame 422, the vertical plate 421 is perpendicular to the frame 422 and is fixedly connected, a plurality of second connecting holes 423 are formed on the vertical plate 421, and the second connecting holes 423 are fixedly connected with the pre-buried bolt of the first connecting member 41 with the flange facing upward. As shown in Figure 7 , the bottom of the frame 422 is fixedly welded with the top surface of the web 413 of the first connecting member 41 with the flange facing downward. It can be understood that the vertical plate 421 can provide a main vertical support surface, while the frame 422 can provide lateral and torsional restraint, together forming a stable connecting unit.

[0046] In the embodiment, the vertical plate 421 and the frame 422 can be connected by welding, which firmly integrates them into an integrated structure through molten metal. This structural design enables the second connecting member 42 to resist vertical shear forces and bending moments from the precast foundation plates 1, thereby providing reliable rigidity connection in the height direction of the joint.

[0047] As shown in Figure 12 , Figure 14 , the frame 422 is fixedly connected by four side plates, a plurality of reinforcing bars 424 are fixedly arranged in the frame 422, and a plurality of third reinforcing plates 425 are fixedly arranged at the angles of the frame. The reinforcing bars are rod-shaped members used to enhance the strength and rigidity of the frame 422, and the reinforcing bars 424 are fixedly arranged in the frame 422, which can improve the overall bending resistance, shear resistance and torsional resistance of the frame 422, preventing local buckling or overall deformation of the frame under stress. The reinforcing bars can be steel bars or shaped steel, which are fixedly connected with the frame by welding. The third reinforcing plates are used to enhance the strength and rigidity of the angle regions between the side plates of the frame 422, avoiding stress concentration, thereby improving the shear resistance and tear resistance of the angle regions.

[0048] As Figure 1 As shown in the drawings, the prefabricated foundation plate 1 is fixedly connected to the pier column 12, and the pier column 12 is used to support the main transformer. The main function of the pier column 12 is to transmit the load of the upper main transformer to the lower prefabricated foundation plate 1. The pier column 12 is usually made of reinforced concrete or steel structure, and the cross-sectional shape can be square, circular or rectangular, and the height and cross-sectional size are determined according to the installation height of the main transformer, the load size and the design requirements of anti-seismic, wind resistance and the like. The pier column 12 can be integrally prefabricated with the prefabricated foundation plate 1, or can be segmented and prefabricated and then assembled on site, such as embedding vertical connecting pieces on the top surface of the prefabricated foundation plate 1, embedding sleeves matched with the vertical connecting pieces at the bottom of the pier column 12, inserting the vertical connecting pieces into the sleeves, and then grouting and reinforcing, which can be realized by the prior art.

[0049] Embodiment 2 The embodiment discloses an assembly method of the prefabricated main transformer foundation, and the prefabricated main transformer foundation disclosed in embodiment 1 is applied, and the specific steps include: Two prefabricated foundation plates 1 are respectively hoisted at the designed positions; The first connecting piece 41 is installed between the two prefabricated foundation plates 1, then the second connecting piece 42 is installed above the two first connecting pieces 41, and the second connecting piece 42 is welded and fixed with the web of the first connecting piece 41 with the flange downward; Then the extrusion plate 34 is installed on both sides of the extrusion rod 31, and the rotating shafts are inserted at both ends of the extrusion plate 34 and the extrusion rod 31, the disc spring 37 is sleeved on the rotating shaft, and finally the rotating shaft cover 36 is fixedly connected at both ends of the rotating shaft.

[0050] Although the specific embodiments of the present application are described above with reference to the drawings, it is not a limitation on the protection scope of the present application, and those skilled in the art should understand that various modifications or changes made by those skilled in the art on the basis of the technical solutions of the present application without creative labor are still within the protection scope of the present application.

Claims

1. A prefabricated main transformer foundation comprising two opposite prefabricated foundation plates, characterized in that, Two said prefabricated foundation plates are connected by rigid components and energy dissipation components; The energy dissipation component comprises extruded rods vertically embedded on opposite sides of the prefabricated foundation plate, coaxial first cylinders fixedly connected to both sides of the end of the extruded rod away from the prefabricated foundation plate, and a plurality of circumferentially arranged fold line grooves evenly formed on the free end surface of the first cylinder; the extruded rod is connected between two extruded plates, a second cylinder is fixedly connected to the side of the extruded plate facing the extruded rod, and a plurality of fold line grooves are also formed on the free end surface of the second cylinder; After the fold line grooves of the first cylinder and the fold line grooves of the second cylinder are engaged and docked, a rotating shaft penetrates the first cylinder and the second cylinder, rotating shaft covers are fixedly connected to both ends of the rotating shaft, and a plurality of disc springs are installed on the rotating shaft between the rotating shaft covers and the extruded plates.

2. The assembled main transformer foundation according to claim 1, characterized in that, Two ends of two said prefabricated foundation plates on opposite sides are connected by rigid components, and the middle part is connected by a plurality of evenly distributed energy dissipation components.

3. The assembled main transformer foundation according to claim 2, characterized in that, The rigid component comprises two first connectors, a first flange of the first connector is fixedly connected to the prefabricated foundation plate, and a second flange is oppositely and tightly connected.

4. The assembled main transformer foundation according to claim 3, characterized in that, A clamping groove is formed in the middle part of the second flange, a web of the first connector is fixedly connected to a clamping plate at a position corresponding to the clamping groove, and a first reinforcing plate is fixedly connected between the clamping plate and the web.

5. The assembled main transformer foundation according to claim 4, characterized in that, A plurality of second reinforcing plates are fixedly connected between the web and the first flange.

6. The assembled main transformer foundation according to claim 5, characterized in that, A plurality of first connecting holes are formed in the first flange and fixedly connected to a plurality of bolts pre-embedded in the side surface of the prefabricated foundation plate.

7. The assembled main transformer foundation according to claim 6, characterized in that, The rigid component further comprises a second connector installed above the two first connectors; the second connector is fixedly connected to the bolts connected to the upward flange of the first connector.

8. The assembled main transformer foundation according to claim 7, characterized in that, The second connector comprises a vertical plate and a frame body, the vertical plate is fixedly connected to the frame body perpendicularly, a plurality of second connecting holes are formed in the vertical plate, and the second connecting holes are connected by pre-embedded bolts; the bottom of the frame body is fixedly welded to the top surface of the web of the downward first connector of the flange.

9. The assembled main transformer foundation according to claim 8, characterized in that, A plurality of reinforcing rods are fixedly installed in the frame body, and a plurality of third reinforcing plates are fixedly installed at the included angles of the frame body.

10. The method of assembling a packaged main transformer foundation according to any one of claims 1 to 9, characterized in that, The specific steps include: Two prefabricated foundation plates are respectively hoisted at the designed positions; The first connectors are installed between the two prefabricated foundation plates, then the second connector is installed above the two first connectors, and the second connector is fixedly welded to the web of the downward first connector of the flange; Then, the extruded plates are installed on both sides of the extruded rod, the rotating shaft is inserted into the extruded plate and the two ends of the extruded rod, the disc springs are installed on the rotating shaft, and finally the rotating shaft covers are fixedly connected to both ends of the rotating shaft.

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