Support for positioning oil-immersed energy storage transformer body

Abstract

According to the positioning support for the oil-immersed energy storage transformer body, the device body is arranged in a box body of an energy storage transformer, clamping pieces are symmetrically arranged at the two ends of the device body, connecting plates are transversely arranged on the front sides and the rear sides of the upper ends of the clamping pieces, and the middles of the connecting plates are connected with the upper surfaces of clamping plates in an inserted mode through inserting holes; a connecting plate is arranged in the box body, two ends of the connecting plate are connected with a fixing support through fixing holes, the fixing support is symmetrically arranged outside two sides of a clamping piece, the fixing support is transversely and horizontally arranged on two sides of the inner wall of the box body, and the fixing support comprises a support footstand and a fixing stand column. By means of the novel method for fixing the transformer body, namely, the fixing support is welded to the surface of the inner wall of the box body, and the transformer body is connected with the fixing support through the connecting plate, so that the transformer body and the box body can be directly connected, and the method is suitable for a novel container type energy storage transformer body positioning mode.

Description

Technical Field

[0001] This article belongs to the technical field of transformer body positioning brackets, and specifically relates to a positioning bracket for the body of an oil-immersed energy storage transformer. Background Art

[0002] In a containerized energy storage substation, energy storage units are installed in standardized containers. These containers contain an energy management system (EMS), a power conversion system (PCS), a thermal management system, an energy storage transformer, and other control hardware. Such substations have relatively strict requirements for the size of the transformer. While trying every means to reduce the volume of the transformer, due to changes in the installation positions and methods of bushings and the like, the connection method between the transformer body and the tank cover has changed.

[0003] According to the sizes of the containers used in current energy storage substations, they are roughly divided into two types: 20-foot and 40-foot high-cube, with lengths, widths, and heights of 5.89m×2.35m×2.18m and 12m×2.35m×2.49m respectively. Taking a 40-foot containerized substation as an example, an SF-6000 / 33 / 0.69×2 double-low-voltage oil-immersed energy storage transformer is installed. After removing the dimensions occupied by the frame, strengthening beams, PCS, and control cabinet, the installation space for the transformer is only 3.4m×2.28m×2.45m left.

[0004] As Figure 4 and Figure 5 shown, the high- and low-voltage bushings of a traditional oil-immersed power transformer are installed on the upper part of the tank cover. Before the transformer body is placed in the lower tank, the bushings and leads have been connected. Therefore, the tank cover is connected to the clamping piece in advance, and the transformer body is lifted by the tank cover and placed into the oil tank.

[0005] The upper bracket is welded to the inner side of the tank cover, and the upper clamping piece is connected to the upper bracket through bolts and nuts.

[0006] For a conventional oil-immersed power transformer with a capacity of 6000 kVA and the same parameters such as loss value and impedance, the external dimensions are 3.2m×3.5m×3.4m, and the width and height seriously do not meet the containerized installation conditions. In this case, an oil-immersed energy storage transformer that meets the containerized installation conditions has been developed. The fixing method of the body of such an energy storage transformer is completely different from that of a traditional oil-immersed transformer. Since the high- and low-voltage bushings of the energy storage transformer are installed on the side wall of the oil tank instead of on the tank cover, the connection process between the leads and the bushings can only be carried out after the transformer body is placed in the lower tank. The transformer body and the tank cover are separated independently and have no connection. Utility Model Content

[0007] To solve the above problems, this paper proposes a positioning bracket for the body of an oil-immersed energy storage transformer. The body of the energy storage transformer is provided inside the box body. Clamping members are symmetrically arranged at both ends of the body. On the front and rear sides of the upper end of each clamping member, connecting plates are horizontally arranged. The middle of the connecting plate is inserted and connected to the upper surface of the clamping plate through an insertion hole. The two ends of the connecting plate are connected to the fixed bracket through fixing holes. The fixed brackets are symmetrically arranged outside the two sides of the clamping members. The fixed brackets are horizontally arranged on both sides of the inner wall of the box body. The fixed bracket includes a bracket foot seat and a fixed column. The bracket foot seat is horizontally arranged on both sides of the inner wall of the box body. A fixed column is vertically arranged above the bracket foot seat. The fixed column is a variable-diameter cylinder. The diameter of the upper end of the fixed column is smaller than the diameter of the lower end of the fixed column. The diameter of the lower end of the fixed column is the same as the diameter of the fixing hole. The center distance between the two fixed columns on both sides is the same as the center distance between the fixing holes on the surface of the connecting plate. Due to the new installation method of the high- and low-voltage bushings, the box cover and the body cannot be directly connected. By the new method of fixing the body, that is, welding the fixed brackets on the inner wall surface of the box body and connecting the body to the fixed brackets through the connecting plates, the connection between the body and the box body can be directly achieved, which is applicable to the new positioning method of the body of the container-type energy storage transformer.

[0008] The shape of the box body of the energy storage transformer is a vertical rectangular box. A box cover is provided outside the top surface of the box body. A body is vertically arranged at the center inside the box body. There is a cavity spacing between the top surface of the body and the bottom surface of the box cover.

[0009] The clamping members are symmetrically arranged on the upper sides of both ends of the body. The shape of the clamping member is a C-shaped profile. The clamping members are longitudinally symmetrically arranged on both sides of the body with the openings facing outward. Positioning columns are vertically arranged above the front and rear ends of the top surface of the clamping members. The positioning columns are inserted and connected to the insertion holes of the connecting plates. The shape of the connecting plate is a rectangular long strip plate. Fixing holes and insertion holes are symmetrically arranged on the surface of the connecting plate based on the longitudinal center line. Both the fixing holes and the insertion holes are through holes. The shape of the fixing hole is circular. The shape of the insertion hole is a horizontal strip-shaped waist hole. Through the insertion connection between the connecting plate and the clamping member, the clamping members at both ends of the body can be conveniently connected to both sides of the box body through the connecting plate, so that the body can be directly suspended horizontally inside the box body.

[0010] The shape of the support pedestal is a C-shaped channel steel. The open slots of the support pedestal are downwardly arranged on both sides of the inner wall of the box body. One end of the support pedestal is vertically connected to the inner wall of the box body. Vertically perpendicular to the outer end of the upper surface of the support pedestal, there is a fixed column. The shape of the fixed column is a cylindrical stepped column. The upper end of the fixed column is a small-diameter stud, and the lower end of the fixed column is a large-diameter fixed column. The small-diameter stud and the large-diameter fixed column are connected by an inclined surface transition. The outer surface of the small-diameter stud is provided with locking threads, and the size of the locking threads of the small-diameter stud is the same as the internal thread size of the nut. The diameter of the large-diameter fixed column is the same as the diameter of the fixing hole. If an ordinary vertically perpendicular stud is directly used for connection and fixation, during the process of lowering the body with the connecting plate into the box, due to processing errors, the inner side of the fixing hole of the connecting plate will touch the small-diameter stud of the fixed support, which may deform the threads, resulting in the inability to complete the next process of tightening the nut. During the transformer transportation project, the body has a certain displacement, causing the fixing hole of the connecting plate to collide and rub against the small-diameter stud of the fixed support, also causing thread damage. If the transformer needs to be repaired later, due to the damaged threads, the nut cannot be disassembled and removed, resulting in the inability to smoothly separate and lift out the body from the fuel tank. Therefore, by using a stepped fixed column, the part that the fixing hole of the connecting plate can contact is the large-diameter fixed column at the lower end, rather than the small-diameter stud, thus effectively avoiding the situation of thread damage.

[0011] Beneficial effects:

[0012] Due to the new installation method of the high- and low-voltage bushings, the tank cover and the body cannot be directly connected. Through a new method of fixing the body, that is, welding a fixed support on the inner wall surface of the box body and connecting the body to the fixed support through a connecting plate, the direct connection between the body and the box body can be realized, which is applicable to the new method of positioning the body of the container-type energy storage transformer.

[0013] Through the plug-in connection between the connecting plate and the clamping parts, the clamping parts at both ends of the body can be conveniently connected to both sides of the box body through the connecting plate, so that the body can be directly suspended horizontally inside the box body.

[0014] If an ordinary vertically perpendicular stud is directly used for connection and fixation, during the process of lowering the body with the connecting plate into the box, due to processing errors, the inner side of the fixing hole of the connecting plate will touch the small-diameter stud of the fixed support, which may deform the threads, resulting in the inability to complete the next process of tightening the nut. During the transformer transportation project, the body has a certain displacement, causing the fixing hole of the connecting plate to collide and rub against the small-diameter stud of the fixed support, also causing thread damage. If the transformer needs to be repaired later, due to the damaged threads, the nut cannot be disassembled and removed, resulting in the inability to smoothly separate and lift out the body from the fuel tank. By using a stepped fixed column, the part that the fixing hole of the connecting plate can contact is the large-diameter fixed column at the lower end, rather than the small-diameter stud, thus effectively avoiding the situation of thread damage. Brief Description of the Drawings

[0015] Figure 1 is an internal schematic diagram of a positioning bracket for the body of an oil-immersed energy storage transformer;

[0016] Figure 2 is a schematic diagram of a fixed bracket of a positioning bracket for the body of an oil-immersed energy storage transformer;

[0017] Figure 3 is a schematic diagram of a connecting plate of a positioning bracket for the body of an oil-immersed energy storage transformer;

[0018] Figure 4 is an internal schematic diagram of the existing body of an energy storage transformer;

[0019] Figure 5 is a connection sectional view of the existing body of an energy storage transformer;

[0020] In the figure: 1, body; 2, clamping piece; 3, tank cover; 4, connecting plate; 41, fixing hole; 42, insertion hole; 5, fixed bracket; 51, bracket footrest; 52, fixed column; 6, upper clamping piece; 7, screw; 8, nut. Detailed Description of the Preferred Embodiment

[0021] To deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with the embodiments and the drawings. The embodiments are only used to explain the present invention and do not limit the protection scope of the present invention.

[0022] Body 1, clamping piece 2, tank cover 3, connecting plate 4, fixing hole 41, insertion hole 42, fixed bracket 5, bracket footrest 51, fixed column 52, upper clamping piece 6, screw 7, nut 8.

[0023] As Figure 1 、 2 shown in Figures 3;

[0024] A positioning bracket for the body 1 of an oil-immersed energy storage transformer. Inside the box body of the energy storage transformer, there is a body 1. At both ends of the body 1, clamping pieces 2 are symmetrically arranged. On the front and rear sides of the upper end of each clamping piece 2, connecting plates 4 are horizontally arranged. The middle of the connecting plate 4 is inserted and connected to the upper surface of the clamping plate through the insertion hole 42. The two ends of the connecting plate 4 are connected to the fixed bracket 5 through the fixing holes 41. The fixed brackets 5 are symmetrically arranged outside the two sides of the clamping pieces 2. The fixed brackets 5 are horizontally arranged on both sides of the inner wall of the box body. The fixed bracket 5 includes a bracket footrest 51 and a fixed column 52. The bracket footrest 51 is horizontally arranged on both sides of the inner wall of the box body. Above the bracket footrest 51, a fixed column 52 is vertically arranged. The fixed column 52 is a variable-diameter cylinder. The diameter of the upper end of the fixed column 52 is smaller than the diameter of the lower end of the fixed column 52. The diameter of the lower end of the fixed column 52 is the same as the diameter of the fixing hole 41. The center distance between the two fixed columns 52 on both sides is the same as the center distance between the fixing holes 41 on the surface of the connecting plate 4. The shape of the box body of the energy storage transformer is a vertical rectangular box. There is a box cover 3 on the outside of the top surface of the box body. Inside the box body, a body 1 is vertically arranged at the center. There is a cavity spacing between the top surface of the body 1 and the bottom surface of the box cover 3. The clamping pieces 2 are symmetrically arranged on the upper sides of both ends of the body 1. The shape of the clamping piece 2 is a C-shaped profile. The clamping piece 2 is longitudinally symmetrically arranged on both sides of the body 1 with the opening facing outwards. Above the front and rear ends of the top surface of the clamping piece 2, positioning columns are vertically arranged. The positioning columns are inserted and connected to the insertion holes 42 of the connecting plate 4. The shape of the connecting plate 4 is a rectangular long strip plate. On the surface of the connecting plate 4, fixing holes 41 and insertion holes 42 are symmetrically arranged based on the longitudinal center line. Both the fixing hole 41 and the insertion hole 42 are through holes. The shape of the fixing hole 41 is circular. The shape of the insertion hole 42 is a horizontal strip-shaped waist hole. The shape of the bracket footrest 51 is a C-shaped channel steel. The open groove of the bracket footrest 51 faces downwards and is arranged on both sides of the inner wall of the box body. One end of the bracket footrest 51 is vertically connected to the inner wall of the box body. On the outer end of the upper surface of the bracket footrest 51, a fixed column 52 is vertically arranged. The shape of the fixed column 52 is a cylindrical variable-diameter column. The upper end of the fixed column 52 is a small-diameter stud, and the lower end of the fixed column 52 is a large-diameter fixing column. The small-diameter stud and the large-diameter fixing column are connected by an inclined surface. On the outer surface of the small-diameter stud, locking threads are provided. The size of the locking threads of the small-diameter stud is the same as the internal thread size of the nut 8. The diameter of the large-diameter fixing column is the same as the diameter of the fixing hole 41.

[0025] Implementation example;

[0026] The fixed bracket 5 is welded to the inner side of the inner wall of the box body. The fixed bracket 5 is composed of a bracket footrest 51 and a fixed column 52 which are welded together. The clamping members 2 on the high-voltage and low-voltage sides of the body 1 are connected together by a connecting plate 4. After the connecting plate 4 is snapped into the fixed bracket 5, a nut 8 is used to press down and connect and fix it from above, so as to meet the positioning requirements of the body 1.

[0027] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A bracket for positioning an oil-immersed energy storage transformer body, wherein the body is arranged inside the box of the energy storage transformer, and clamps are symmetrically arranged at both ends of the body, characterized in that: The front and rear sides of the upper end of the clamp are both horizontally provided with connecting plates, the middle part of the connecting plate is plugged and connected to the upper surface of the clamp through a plug-in hole, and the two ends of the connecting plate are connected to the fixed bracket through fixing holes. The fixed brackets are symmetrically arranged on both sides of the clamp, and the fixed brackets are horizontally arranged on both sides of the inner wall of the box. The fixed brackets include bracket feet and fixed columns. The bracket feet are horizontally arranged on both sides of the inner wall of the box, and fixed columns are vertically arranged above the bracket feet. The fixed columns are variable diameter cylinders, and the upper end diameter of the fixed columns is smaller than the lower end diameter of the fixed columns. The lower end diameter of the fixed columns is the same as the diameter of the fixing holes, and the center distance between the fixed columns on both sides is the same as the center distance between the fixing holes on the surface of the connecting plate.

2. A positioning bracket for an oil-immersed energy storage transformer body according to claim 1, characterized in that: The box of the energy storage transformer is in the shape of a vertical rectangular box, a box cover is arranged on the outer side of the top surface of the box, a device body is arranged vertically in the center of the box, and a cavity distance is arranged between the top surface of the device body and the bottom surface of the box cover.

3. A bracket for positioning an oil-immersed energy storage transformer body according to claim 1, characterized in that: The clamp is symmetrically arranged on both sides of the upper end of the device body. The shape of the clamp is a C-shaped profile. The clamp opens outward and is symmetrically arranged on both sides of the device body longitudinally. Positioning columns are vertically arranged on the upper outputs of the front and rear ends of the top surface of the clamp. The positioning column output is plug-in connected to the plug-in hole of the connecting plate.

4. A bracket for positioning an oil-immersed energy storage transformer body according to claim 1, characterized in that: The connecting plate is in the shape of a rectangular long strip, and the surface of the connecting plate is symmetrically provided with fixing holes and plug-in holes based on the longitudinal midline. The fixing holes and plug-in holes are both through-holes. The fixing holes are in the shape of a circle, and the plug-in holes are in the shape of a horizontal strip waist hole.

5. A bracket for positioning an oil-immersed energy storage transformer body according to claim 1, characterized in that: The bracket foot is in the shape of a C-shaped channel steel, and the opening groove of the bracket foot is downwardly arranged on both sides of the inner wall of the box body, one end of the bracket foot is vertically connected to the inner wall of the box body, and a fixed column is vertically arranged on the outer end of the upper surface of the bracket foot.

6. A bracket for positioning an oil-immersed energy storage transformer body according to claim 1, characterized in that: The shape of the fixed column is a cylindrical variable diameter column, the upper end of the fixed column is a small diameter stud, and the lower end of the fixed column is a large diameter fixed column. The small diameter stud and the large diameter fixed column are connected by an inclined transition. The outer surface of the small diameter stud is provided with a locking thread. The size of the locking thread of the small diameter stud is the same as the internal thread size of the nut, and the diameter of the large diameter fixed column is the same as the diameter of the fixing hole.

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