Safety protection device for dry-type transformer

Abstract

The application belongs to the technical field of transformer application, and particularly relates to a safety protection device of a dry-type transformer. The safety protection device comprises a dry-type transformer station and a dry-type transformer. The dry-type transformer is arranged in the dry-type transformer station. The dry-type transformer is a dry-type transformer with a fan at the bottom. The dry-type transformer station comprises a front end plate, a rear end plate, side plates and a top cover. The area of the top cover is larger than the area surrounded by the front end plate, the rear end plate and the side plates. The side plates are provided with air holes. The side plates are also provided with control pipes. The control pipes are rotated to open and close the air holes, so that the large-scale entry of water vapor in the external humid environment is avoided. The heat generated by the dry-type transformer is transmitted to the control pipes by the arrangement of heat absorption covers and other devices. The control pipes are directly contacted with the water vapor, so that the humidity in the station is reduced.

Description

Technical Field

[0001] This invention belongs to the field of transformer application technology, and in particular relates to a safety protection device for dry-type transformers. Background Technology

[0002] A dry-type transformer is a transformer whose core and windings are not immersed in insulating oil. Existing dry-type transformers mainly include open-type, enclosed-type, and cast-resin type. Among them, the open-type is a commonly used type, whose body is in direct contact with the atmosphere and is suitable for relatively dry and clean indoor environments (when the ambient temperature is 20 degrees Celsius, the relative humidity should not exceed 85%). Generally, there are two cooling methods: air self-cooling and air cooling.

[0003] To facilitate the use of dry-type transformers, most existing dry-type transformers are sold and used together with dry-type transformer substations (enclosures), which allows dry-type transformers to be used outdoors when used with dry-type transformer substations.

[0004] However, existing dry-type transformer substations (enclosures) only consider heat dissipation, but not relative humidity. In rainy weather, the humidity inside the enclosure can easily exceed 85%, thus affecting the service life of the dry-type transformer. Summary of the Invention

[0005] This invention addresses the technical problems existing in dry-type transformer stations used with existing dry-type transformers by proposing a safety protection device for dry-type transformers that is reasonably designed, simple in structure, and can effectively utilize the waste heat of dry-type transformers to reduce relative humidity and air temperature.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: The present invention provides a safety protection device for a dry-type transformer, comprising a dry-type transformer station and a dry-type transformer. The dry-type transformer is located inside the dry-type transformer station and is a dry-type transformer with a fan at the bottom. The dry-type transformer station includes a front end plate, a rear end plate, side plates, and a top cover. The area of ​​the top cover is larger than the area enclosed by the front end plate, the rear end plate, and the side plates. Ventilation holes are provided on the side plates, and the ventilation holes are evenly distributed in an array on the side plates. A control pipe is also provided on the side plates, and the control pipe is vertically installed on the side plates. The control tube has a venting groove on its side wall and is rotatably mounted on the side plate. Rotating the control tube allows simultaneous opening or closing of the same row of venting holes. A heat-absorbing cover is installed on the top of the dry-type transformer. An exhaust fan is connected to the top of the heat-absorbing cover. A distribution box is connected to the end of the exhaust fan away from the heat-absorbing cover. Hot air pipes are connected to both sides of the distribution box. A heat distribution box is installed at the end of the hot air pipe away from the distribution box. A connecting pipe is installed at the bottom of the heat distribution box and is connected to the control tube. An exhaust blind hole is installed inside the dry-type transformer station and is connected to the control tube.

[0007] Preferably, the distribution box is installed inside the top cover, and heat dissipation pipes are connected to the front and rear ends of the distribution box. The heat dissipation pipes extend to the front and rear ends of the top cover, and heat outlet holes are provided at the bottom of the top cover. The heat outlet holes are located on the outer side of the front end plate and the rear end plate, and the heat dissipation pipes are connected to the heat outlet holes.

[0008] Preferably, the top of the control tube extends into the top cover, and a gear is fitted on the top of the control tube. A rack is provided on one side of the gear, and the rack meshes with the gear. An electromagnetic push rod is provided at one end of the rack, and the rack realizes the rotation control of all control tubes on one side plate under the action of the electromagnetic push rod.

[0009] Preferably, the exhaust blind hole is provided on the side plate.

[0010] Preferably, the exhaust blind hole is located at the bottom of the dry-type transformer.

[0011] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0012] 1. This invention provides a safety protection device for dry-type transformers. By installing a control tube on the side plate, the opening and closing of the vent is achieved by rotating the control tube, thereby preventing large-scale entry of moisture from the external humid environment. By using the installation of heat absorption hoods and other equipment, the heat generated by the dry-type transformer is transferred to the control tube. The direct connection of the control tube with moisture not only helps to reduce the humidity in the station, but also reduces the temperature of the hot air, thereby effectively improving the cooling efficiency of the transformer in the station under humid conditions, and thus ensuring the service life of the dry-type transformer. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of the safety protection device for the dry-type transformer provided in Example 1;

[0015] Figure 2 A schematic diagram of the structure of the safety protection device for the dry-type transformer provided in Example 1, showing the removal of the top cover;

[0016] Figure 3 This is a front view of the safety protection device for a dry-type transformer provided in Example 1, with the top cover and sealing door removed.

[0017] Figure 4 A schematic diagram of the control tube provided in Example 1;

[0018] In the above figures, 1. Dry-type transformer station; 11. Front end plate; 111. Sealing door; 12. Side plate; 121. Ventilation hole; 13. Top cover; 131. Top plate; 2. Dry-type transformer; 3. Heat absorption cover; 4. Exhaust fan; 5. Distribution box; 51. Hot air pipe; 52. Heat distribution box; 53. Heat dissipation pipe; 54. Heat dissipation box; 6. Control pipe; 61. Ventilation groove; 62. Gear; 7. Electromagnetic push rod; 8. Rack; 9. Solenoid valve. Detailed Implementation

[0019] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0020] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways than those described herein, and therefore the invention is not limited to the specific embodiments disclosed in the following specification.

[0021] Example 1, such as Figures 1-4 As shown, this embodiment aims to effectively improve the operating environment of the dry-type transformer 2, thereby increasing its service life. Considering that the main problem affecting the service life of the dry-type transformer 2 is relative humidity, primarily due to the influence of rainy weather, this embodiment provides a safety protection device for the dry-type transformer 2. This device includes a dry-type transformer station 1 and a dry-type transformer 2. The dry-type transformer 2 is located inside the dry-type transformer station 1, which is generally box-shaped. Therefore, the dry-type transformer station 1 includes a front panel 11, a rear panel 12, side panels 12, and a top cover 13. A sealing door 111 is hinged to the front panel 11. The top cover 13 includes a top plate 131 and a top cover plate 13 disposed on the top plate 131. The top plate 131 and the top cover plate 13 are similar to the design of an existing tiled house, with extra space for heat dissipation. Specifically, the area of ​​the top plate 131 is larger than the area of ​​the box formed by the front plate 11, the rear plate, and the side plate 12. Thus, by setting holes on the part of the top plate 131 outside the front plate 11, the rear plate, and the side plate 12, and by setting holes on the top plate 131, hot air can be discharged from the station, while rain cannot enter the station.

[0022] Meanwhile, ventilation holes 121 are provided on the side plate 12. The ventilation holes 121 are evenly distributed in an array on the side plate 12. In the traditional design, in order to prevent rainwater from entering, a rain cover is provided on the side plate 12. In this embodiment, in order to ensure that rainwater can enter the ventilation holes 121, there is no rain cover.

[0023] The above structure is the structure of a common dry-type transformer station 1. Therefore, it will not be described in detail in this embodiment. Considering the air circulation problem, in this embodiment, the dry-type transformer 2 is a dry-type transformer with a fan at the bottom. That is, the dry-type transformer 2 used in this embodiment is an air-cooled dry-type transformer.

[0024] Considering that the rain cover design has been removed in this embodiment, it is necessary to prevent rainwater from entering the station from another structural aspect. Therefore, a control pipe 6 is also provided on the side plate 12. The control pipe 6 is vertically mounted on the side plate 12 and passes through the vent holes 121. A vent groove 61 is provided on the side wall of the control pipe 6. The control pipe 6 is rotatably mounted on the side plate 12. By rotating the control pipe 6, the vent holes 121 in the same row can be opened or closed simultaneously. To facilitate the control of these control pipes 6, in this embodiment, the top of the control pipe 6... The control tube 6 extends into the top cover 13, passing through the top plate 131 and extending into the space of the top cover 13. A gear 62 is fitted on the top of the control tube 6, and a rack 7 is provided on one side of the gear 62. A fixing seat (not marked in the figure) is provided on the top plate 131, and the fixing seat is provided with a cylindrical slide rail. The rack 7 slides on the cylindrical slide rail and meshes with the gear 62. An electromagnetic push rod 8 is provided at one end of the rack 7. Under the action of the electromagnetic push rod 8, the rack 7 realizes the rotation control of all the control tubes 6 on one side plate 12. The rotation of the control tube 6 only needs to be 90° to open and close the vent 121. In this way, in non-rainy weather, natural wind can be used to dissipate heat from the dry-type transformer 2.

[0025] Considering that even closing the vent 121 cannot prevent moisture from entering, in order to improve the environment inside the station, in this embodiment, a heat-absorbing cover 3 is provided on the top of the dry-type transformer 2. The top of the heat-absorbing cover 3 is connected to an exhaust fan 4, which draws away the heat generated by the dry-type transformer 2. A distribution box 5 is connected to the end of the exhaust fan 4 away from the heat-absorbing cover 3. The distribution box 5 is also located inside the top cover 13. In this way, the use of other fasteners can be eliminated by using the support of the top plate 131. At the same time, hot air pipes 51 are connected to both sides of the distribution box 5. A heat distribution box 52 is provided at the end of the hot air pipe 51 away from the distribution box 5. The distribution box 5 and the heat distribution box 52 are both simple sealed box structures without other design features. At the same time, a connecting pipe is provided at the bottom of the heat distribution box 52. The connecting pipe is connected to the control pipe 6. In this embodiment, the connecting pipe is fitted inside the control pipe 6. A sealing ring is provided on the side wall of the connecting pipe to ensure that the rotation of the control pipe 6 does not affect the connecting pipe.

[0026] In this way, when the hot air drawn by the exhaust fan 4 passes through the control pipe 6, because there is rainwater in the vent 121 and the outside temperature is low, it will exchange heat with the hot air in the control pipe 6, and while carrying away the heat, it will also dry the surrounding environment to a certain extent and reduce the relative humidity.

[0027] Meanwhile, an exhaust blind hole is installed inside the dry-type transformer station 1, and the exhaust blind hole is connected to the control pipe 6. The exhaust blind hole means that it only connects to the inside of the station and not to the outside. The exhaust blind hole can be located at the bottom of the side plate 12 or on the bottom plate, that is, at the bottom of the dry-type transformer 2. Since the dry-type transformer 2 is air-cooled, internal circulation is achieved within the station. The large amount of cooled air not only improves the cooling effect but also reduces the humidity inside the station, thereby ensuring the service life of the dry-type transformer 2.

[0028] Considering that the dry-type transformer 2 requires forced cooling under non-rainy conditions, heat dissipation pipes 53 are connected to the front and rear ends of the distribution box 5. The heat dissipation pipes 53 extend to the front and rear ends of the top cover 13. The bottom of the top cover 13 is provided with heat outlet holes, which are located on the outer sides of the front end plate 11 and the rear end plate. The heat dissipation pipes 53 are connected to the heat outlet holes. In this embodiment, a heat dissipation box 54 is connected to the end of the heat dissipation pipe 53, and the heat dissipation box 54 is connected to the heat outlet holes.

[0029] The main purpose of this design is that the heat outlet vents downwards to discharge hot air. If it were located in the direction of side plate 12, the hot air would enter the station again with the natural wind, raising the temperature inside the station. Of course, it is not necessary for the hot air to enter the control pipe 6 at this time. For this reason, solenoid valves 9 are installed on both the hot air pipe 51 and the heat dissipation pipe 53. When it rains, the solenoid valve 9 on the heat dissipation pipe 53 is closed, and the solenoid valve 9 on the hot air pipe 51 is open, ensuring that the hot air flows through the control pipe 6 to achieve internal circulation within the station. When it is not raining, the solenoid valve 9 on the heat dissipation pipe 53 is opened, and the solenoid valve 9 on the hot air pipe 51 is closed, ensuring that the heat is discharged.

[0030] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A safety protection device for a dry-type transformer, comprising a dry-type transformer substation and a dry-type transformer, wherein the dry-type transformer is located inside the dry-type transformer substation, and the dry-type transformer is a dry-type transformer with a bottom fan; the dry-type transformer substation includes a front end plate, a rear end plate, side plates, and a top cover, wherein... The area of ​​the top cover is larger than the area enclosed by the front end plate, the rear end plate, and the side plates. Ventilation holes are provided on the side plates, and these holes are evenly distributed in an array. The side plates are characterized by the presence of control tubes, which are vertically mounted and pass through the ventilation holes. Ventilation grooves are provided on the side walls of the control tubes. The control tubes are rotatably mounted on the side plates, allowing simultaneous opening or closing of the same row of ventilation holes by rotating the control tubes. A heat-absorbing cover is provided on the top of the dry-type transformer. An exhaust fan is connected to the top of the heat-absorbing cover. A distribution box is connected to the end of the exhaust fan away from the heat-absorbing cover. Hot air pipes are connected to both sides of the distribution box. A heat-dissipating box is located at the end of each hot air pipe away from the distribution box. The bottom of the heat exchange box is provided with a connecting pipe, which is connected to the control pipe. The dry-type transformer station is provided with an exhaust blind hole, which is connected to the control pipe. The distribution box is located inside the top cover. The front and rear ends of the distribution box are connected with heat dissipation pipes, which extend to the front and rear ends of the top cover. The bottom of the top cover is provided with a heat outlet hole, which is located on the outside of the front and rear end plates. The heat dissipation pipe is connected to the heat outlet hole. The top of the control pipe extends into the top cover. A gear is mounted on the top of the control pipe. A rack is provided on one side of the gear, and the rack meshes with the gear. An electromagnetic push rod is provided at one end of the rack. Under the action of the electromagnetic push rod, the rack realizes the rotation control of all control pipes on one side plate.

2. The safety protection device for a dry-type transformer according to claim 1, characterized in that, The exhaust blind hole is located on the side plate.

3. The safety protection device for a dry-type transformer according to claim 1, characterized in that, The exhaust blind hole is located at the bottom of the dry-type transformer.

Images