Resin insulation dry-type power transformer

Abstract

The utility model discloses a resin insulation dry-type power transformer, which belongs to the technical field of dry-type power transformers and comprises a resin insulation dry-type power transformer main body and a box body, a plurality of cable connectors are mounted on the side surface of the resin insulation dry-type power transformer main body, and two support plates are welded on the inner bottom wall of the box body. A supporting frame is welded to the top faces of the two supporting plates, a plurality of fixing bolts are connected to the top face of the supporting frame in a threaded mode, fixing nuts are connected to the threaded portions of the fixing bolts in a threaded mode, the top faces of the fixing nuts abut against the supporting frame, clamping plates used for clamping and fixing a cable abut against the end faces of the fixing bolts, and connecting plates are welded to the two side faces of each clamping plate. Limiting rods are welded to the top face of the connecting plate, limiting blocks are welded to the end faces of the limiting rods, and the side faces of the limiting rods are in embedded sliding connection with the inner top wall of the supporting frame. According to the resin insulation dry-type power transformer, a cable is pre-clamped and fixed, the cable is prevented from falling off, and the use safety of the resin insulation dry-type power transformer is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of dry-type power transformers, and in particular to a resin-insulated dry-type power transformer. Background Technology

[0002] Grease-insulated dry-type transformers are devices that utilize electromagnetic induction to transform voltage, current, and impedance. Currently, existing grease-insulated dry-type transformers do not have pre-clamping and securing mechanisms in place for the connection between the transformer and the cable. This can lead to loosening and detachment at the electrical connection point, causing the cable to detach from the transformer under gravity. This can easily result in a short circuit, reducing the safety of the grease-insulated dry-type transformer.

[0003] A search revealed a design for a resin-insulated dry-type power transformer (publication number CN221668640U), which includes two channel steels and a transformer body, as well as a moving assembly and a clamping assembly. The transformer body is fixedly installed between the tops of the two channel steels, and several cable joints are provided on the rear side of the transformer body. The moving assembly is fixedly installed between the tops of the two channel steels, and the clamping assembly is slidably installed inside the moving assembly. The moving assembly is connected to the clamping assembly and drives the clamping assembly to slide. This invention clamps the cable by pushing the sliding clamp, and the cable can be further supported by the support plate, so that the workers do not need to lift the cable for a long time, saving the workers' physical strength and reducing their labor intensity. However, this resin-insulated dry-type transformer does not consider pre-clamping and fixing the cable, which makes it easy for the cable to detach from the resin-insulated dry-type transformer when the electrical connection between the cable and the resin-insulated dry-type transformer becomes loose, causing the resin-insulated dry-type transformer to short-circuit and reducing the safety of the resin-insulated dry-type transformer. Utility Model Content

[0004] The purpose of this invention is to provide a resin-insulated dry-type power transformer to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a resin-insulated dry-type power transformer, comprising a resin-insulated dry-type power transformer body and a box for storing the resin-insulated dry-type power transformer body. Several cable connectors are installed on the sides of the resin-insulated dry-type power transformer body. Two support plates are welded to the bottom wall of the box. A support frame is welded to the top surface of the two support plates. Several fixing bolts are threadedly connected to the top surface of the support frame. Fixing nuts are threadedly connected to the threaded portions of the fixing bolts. The top surface of the fixing nuts abuts against the support frame. Clamping plates for clamping and fixing cables abut against the end faces of the fixing bolts. Connecting plates are welded to both sides of the clamping plates. Limiting rods are welded to the top surface of the connecting plates. Limiting blocks are welded to the end faces of the limiting rods. The sides of the several limiting rods are slidably embedded in the inner top wall of the support frame.

[0006] Preferably, an installation ring is embedded and fixedly connected to the inner side wall of the housing, and a fan is installed on the inner ring surface of the installation ring.

[0007] Preferably, four equally spaced fixing rods are provided on the side of the fan, and the end faces of the four fixing rods are welded to the mounting ring.

[0008] Preferably, a fixed bearing is embedded and fixedly connected to the end of the fixed rod away from the mounting ring, and a rotating rod is interference-fitted to the inner ring of the fixed bearing.

[0009] Preferably, a fixing plate is embedded and fixedly connected to the side of the rotating rod, and a rubber plate is fixedly connected to the side of the fixing plate near the fixing rod.

[0010] Preferably, four rubber plates abut against filter rings on their sides, and filter screens are fixedly connected to the inner ring surface of the filter rings.

[0011] Preferably, the side of the filter ring abuts against the fan, and a door is installed on the outer side wall of the housing.

[0012] Compared with the prior art, the technical effects and advantages of this utility model are:

[0013] This resin-insulated dry-type power transformer, when its enclosure door is opened, allows for maintenance of the transformer body inside the enclosure. The fixing bolts move along the threaded path of the support frame. During the transmission process, the longitudinal contact position of the fixing bolts with the clamping plate is adjusted. This allows the clamping plate to cooperate with the inner bottom wall of the support frame, pre-clamping and fixing the cables electrically connected to the transformer body. This prevents the cables from loosening and causing a short circuit, thus improving the safety of the transformer. The movement path of the support frame's fixed limit rod, connected by the connecting plate, enhances the longitudinal stability of the clamping plate. The fixing nuts provide positional fixation for the fixing bolts.

[0014] This resin-insulated dry-type power transformer features a fan that draws in outside air and introduces it into the enclosure for heat dissipation. A filter screen prevents dust and other debris from entering the enclosure. A filter ring supports the filter screen, and a fixed bearing controls the rotation of the rotating rod. This, in turn, causes four fixed plates to rotate, clamping and securing the filter ring. The four fixed rods also support the filter ring, facilitating easy disassembly and cleaning of the filter screen and improving the usability of the resin-insulated dry-type power transformer. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a partial structural diagram of the box body of this utility model;

[0018] Figure 3 This is a structural schematic diagram of the support plate and support frame of this utility model;

[0019] Figure 4 For the present utility model Figure 1 Enlarged view of the structure at point A in the middle.

[0020] Explanation of reference numerals in the attached figures:

[0021] In the diagram: 1. Main body of resin-insulated dry-type power transformer; 2. Enclosure; 3. Support plate; 4. Support frame; 5. Clamping plate; 6. Connecting plate; 7. Limiting rod; 8. Limiting block; 9. Fixing bolt; 10. Fixing nut; 11. Cable connector; 12. Enclosure door; 13. Mounting ring; 14. Fan; 15. Fixing rod; 16. Fixing bearing; 17. Rotating rod; 18. Rubber plate; 19. Fixing plate; 20. Filter ring; 21. Filter screen. Detailed Implementation

[0022] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0023] Unless otherwise defined, the directions mentioned herein, such as up, down, left, right, front, back, inside, and outside, are based on the directions shown in the figures of this utility model, and are explained here together.

[0024] The connection method can be any existing method, such as bonding, welding, or bolting, depending on the actual needs.

[0025] To address the issue of reduced safety in resin-insulated dry-type power transformers due to the lack of pre-clamping and securing of cables, please refer to [link to relevant documentation]. Figures 1 to 4 The structure of the device body consists of a resin-insulated dry-type power transformer body 1 and a box 2 for storing the resin-insulated dry-type power transformer body 1. The bottom surface of the resin-insulated dry-type power transformer body 1 is detachably connected to the inner bottom wall of the box 2 by bolts. Several cable connectors 11 are installed on the side of the resin-insulated dry-type power transformer body 1, and are electrically connected to cables through the cable connectors 11. Two support plates 3 are welded to the inner bottom wall of the box 2, and support frames 4 are welded to the top surface of the two support plates 3. The two support plates 3 provide support for the support frames 4, and several fixing bolts 9 are threadedly connected to the top surface of the support frames 4.

[0026] The fixing bolt 9 moves along the threaded path of the support frame 4. The threaded part of the fixing bolt 9 is threadedly connected to the fixing nut 10. The top surface of the fixing nut 10 abuts against the support frame 4. When the fixing nut 10 and the fixing bolt 9 rotate relative to each other, the top surface of the fixing nut 10 comes into close contact with the inner top wall of the support frame 4, thereby providing a positional fixing effect for the fixing bolt 9. The end face of the fixing bolt 9 abuts against the clamping plate 5 for clamping and fixing the cable. Adjusting the fixing bolt 9 to the designated position allows the clamping plate 5 and the support frame 4 to cooperate in clamping and fixing the cable, realizing the pre-clamping and fixing of the cable by the resin-insulated dry-type power transformer. This prevents the connection between the cable and the main body 1 of the resin-insulated dry-type power transformer from becoming loose, which could cause the cable to detach from the main body 1 of the resin-insulated dry-type power transformer, resulting in a short circuit in the resin-insulated dry-type power transformer, thereby improving the safety of the resin-insulated dry-type power transformer.

[0027] Connecting plates 6 are welded to both sides of the clamping plate 5 to enable synchronous movement of the two connecting plates 6 and the clamping plate 5. Limiting rods 7 are welded to the top surface of the connecting plates 6, and limiting blocks 8 are welded to the end face of the limiting rods 7. The sides of several limiting rods 7 are slidably embedded in the inner top wall of the support frame 4. Several through grooves are opened in the inner top wall of the support frame 4. The inner wall of the through groove of the support frame 4 is slidably connected to the limiting rods 7, thereby fixing the movement path of the limiting rods 7. The connecting plates 6 provide a connecting function and enhance the longitudinal movement stability of the clamping plate 5 during transmission. The limiting blocks 8 prevent the limiting rods 7 from disengaging from the support frame 4. At the same time, the clamping plates 5 correspond one-to-one with the cable connectors 11.

[0028] An installation ring 13 is embedded and fixedly connected to the inner wall of the enclosure 2. A fan 14 is installed on the inner ring surface of the installation ring 13. The fixed end of the fan 14 is detachably connected to the inner ring surface of the installation ring 13 by bolts. The fan 14 draws in outside air and introduces outside air into the enclosure 2 to provide heat dissipation for the resin-insulated dry-type power transformer body 1 inside the enclosure 2. Four equidistant fixed rods 15 are provided on the side of the fan 14. The end faces of the four fixed rods 15 are welded to the installation ring 13. A fixed bearing 16 is embedded and fixedly connected to the end of the fixed rod 15 away from the installation ring 13. A rotating rod 17 is interference-fitted to the inner ring of the fixed bearing 16. The fixed bearing 16 fixes the rotation of the rotating rod 17 to a fixed position and realizes the relative rotation of the fixed rod 15 and the rotating rod 17. A fixed plate 19 is embedded and fixedly connected to the side of the rotating rod 17. A rubber plate 18 is fixedly connected to the side of the fixed plate 19 near the fixed rod 15, and the end face of the rotating rod 17 passes through the rubber plate 18 and the fixed plate 19 respectively.

[0029] Four rubber plates 18 abut against the sides of filter rings 20, and filter screens 21 are fixedly connected to the inner ring surface of filter rings 20. The four rubber plates 18 provide initial positional fixation for filter rings 20, while the four fixing rods 15 abut against the filter rings 20 on their concentric sides to further fix the position of filter rings 20. The filter screens 21 also provide a shielding effect on the air inlet of the fan 14 to prevent external dust and other debris from entering the housing 2. At the same time, it is easy to disassemble the filter rings 20 to clean the filter screens 21, prevent the filter screens 21 from becoming clogged, and improve the heat dissipation effect of the resin-insulated dry-type power transformer. The sides of filter rings 20 abut against the fan 14. A door 12 is installed on the outer wall of the housing 2, and a shielding net is installed on the side of the door 12 to allow hot air inside the housing 2 to flow out through the shielding net.

[0030] The fan 14 is existing technology. Its working principle, size and model are not related to the function of this application, so they will not be described in detail. The control method of this utility model is through a controller. The control circuit of the controller can be implemented by a person skilled in the art through simple programming. The power supply is also common knowledge in the art. Furthermore, this utility model is mainly used to protect mechanical devices, so the control method and circuit connection will not be explained in detail.

[0031] Working principle

[0032] When using this resin-insulated dry-type power transformer, the user passes the cable through the side of the clamping plate 5 adjacent to the support frame 4, and the cable is electrically connected to the cable connector 11. At the same time, the fixing bolt 9 moves along the threaded path of the support frame 4, and the end face of the fixing bolt 9 pushes the clamping plate 5 to move in position, so that the bottom surface of the clamping plate 5 clamps the cable with the inner bottom wall of the support frame 4. Under the connection provided by the connecting plate 6, the limiting rod 7 moves longitudinally and moves along the inner wall of the through groove of the support frame 4, which enhances the stability of the position movement of the clamping plate 5. The fixing nut 10 rotates, so that the top surface of the fixing nut 10 is in close contact with the inner top wall of the support frame 4, which provides a position fixing effect for the fixing bolt 9.

[0033] Start the fan 14. The fan 14 draws in outside air into the housing 2, allowing the hot air inside the housing 2 to flow out of the housing 2 through the shielding net. The filter 21 blocks outside dust and debris, causing the four rotating rods 17 to rotate. This causes the fixing plate 19 to rotate the rubber plate 18, releasing the four rubber plates 18 from fixing the filter ring 20. At the same time, it releases the four fixing rods 15 from supporting the filter ring 20, allowing the filter 21 to be disassembled and cleaned.

[0034] It should be noted that, in this article, relational terms such as one and two are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "including an element defined by ... does not exclude the presence of other identical elements in the process, method, article or device that includes the element."

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A resin-insulated dry-type power transformer, comprising a resin-insulated dry-type power transformer body (1) and a housing (2) for storing the resin-insulated dry-type power transformer body (1), characterized in that: The resin-insulated dry-type power transformer body (1) has several cable connectors (11) installed on its side. The bottom wall of the box (2) has two support plates (3) welded on it. The top surface of the two support plates (3) is welded with a support frame (4). The top surface of the support frame (4) is threaded with several fixing bolts (9). The threaded part of the fixing bolt (9) is threadedly connected to the fixing nut (10). The top surface of the fixing nut (10) abuts against the support frame (4). The end face of the fixing bolt (9) abuts against the clamping plate (5) for clamping and fixing the cable. The clamping plate (5) is welded to both sides with connecting plates (6). The top surface of the connecting plate (6) is welded with a limit rod (7). The end face of the limit rod (7) is welded with a limit block (8). The sides of several limit rods (7) are slidably embedded in the inner top wall of the support frame (4).

2. The resin-insulated dry-type power transformer according to claim 1, characterized in that: An installation ring (13) is embedded and fixedly connected to the inner side wall of the housing (2), and a fan (14) is installed on the inner ring surface of the installation ring (13).

3. A resin-insulated dry-type power transformer according to claim 2, characterized in that: The fan (14) has four equally spaced fixing rods (15) on its side, and the end faces of the four fixing rods (15) are welded to the mounting ring (13).

4. A resin-insulated dry-type power transformer according to claim 3, characterized in that: The fixed rod (15) is fixedly connected to a fixed bearing (16) at the end away from the mounting ring (13), and the inner ring of the fixed bearing (16) is interference-fitted with a rotating rod (17).

5. A resin-insulated dry-type power transformer according to claim 4, characterized in that: A fixing plate (19) is embedded and fixedly connected to the side of the rotating rod (17), and a rubber plate (18) is fixedly connected to the side of the fixing plate (19) near the fixing rod (15).

6. A resin-insulated dry-type power transformer according to claim 5, characterized in that: The four rubber plates (18) are abutted against the sides of the filter rings (20), and the filter screens (21) are fixedly connected to the inner ring surface of the filter rings (20).

7. A resin-insulated dry-type power transformer according to claim 6, characterized in that: The side of the filter ring (20) abuts against the fan (14), and the outer side wall of the housing (2) is equipped with a door (12).

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