CN110676018A

CN110676018A - Oil-immersed transformer based on cooling protection device

Info

Publication number: CN110676018A
Application number: CN201910906643.5A
Authority: CN
Inventors: 王宁; 陈盛茂; 余杏云
Original assignee: Zhuhai Xinhua Magnetic Material Co Ltd
Current assignee: Zhuhai Xinhua Magnetic Material Co Ltd
Priority date: 2019-09-24
Filing date: 2019-09-24
Publication date: 2020-01-10

Abstract

The invention discloses an oil-immersed transformer based on a cooling protection device in the technical field of oil-immersed transformer equipment, which comprises a shell, the bottom end of the shell is provided with a recovery water tank, the bottom end of the recovery water tank is symmetrically provided with support legs, the inner cavity of the shell is provided with two movable plates in a sliding way, and the two movable plates are respectively positioned at the upper side and the lower side of the inner cavity of the shell, by forming a water curtain on the cooling water curtain, combining the water curtain with a negative pressure fan and utilizing the principle of water evaporation and heat absorption, so that the temperature in the shell is quickly reduced, and the effect of cooling and radiating the transformer body is further achieved, the cooling environmental protection effect and the power saving effect are not possessed by other cooling equipment, the water loss can be effectively reduced through the arranged water flow recovery system, outdoor rainwater can be collected through the rain collecting cover that sets up, and the damping spring through setting up can effectively weaken the harm of vibrations to equipment electrical part during operation.

Description

Oil-immersed transformer based on cooling protection device

Technical Field

The invention relates to the technical field of oil-immersed transformers, in particular to an oil-immersed transformer based on a cooling protection device.

Background

Distribution transformers are one of the important devices in industrial and mining enterprises and civil building power supply and distribution systems, and reduce high network voltage to 230/400V bus voltage used by users. The product is suitable for alternating current of 50(60) Hz and three-phase maximum rated capacity of 2500kVA (single-phase maximum rated capacity 833kVA, a single-phase transformer is not generally recommended), can be used indoors or outdoors, can be arranged on a pole when the capacity is 315kVA or below, and has the environment temperature of not higher than 40 ℃, not lower than-25 ℃, the maximum daily average temperature of 30 ℃, the maximum annual average temperature of 20 ℃, the relative humidity of not more than 90% (environment temperature of 25 ℃) and the altitude of not more than 1000 m. If the above-mentioned conditions are not met, the rating should be adjusted appropriately according to the regulations of GB 6450-86.

The winding and the core are core elements of the transformer. The generation of heat is known from joule's law, either because of the resistance of the windings themselves or the contact resistance at the joints. The winding cannot pass a current higher than the rated current for a long time. In addition, a large electromagnetic force is generated in the winding by the short-circuit current, and the transformer is damaged. The basic winding has two types of concentric type and overlapping type.

The body (winding and iron core) of the oil-immersed transformer is all arranged in an oil tank filled with transformer oil, and the oil tank is welded by steel plates. The oil tank of the medium and small-sized transformers consists of a tank shell and a tank cover, the transformer body of the transformer is placed in the tank shell, and the tank cover is opened to lift the transformer body out for maintenance

However, with the development of modern society, the demand of electricity is rapidly increased, many electrical devices are easily overloaded, in such a high-load operating environment, an oil-immersed transformer cannot well complete a cooling function only by means of heat dissipation of transformer oil of the oil-immersed transformer, so that the oil-immersed transformer is easily subjected to a high temperature during long-time use, and thus the oil-immersed transformer poses a safety threat to the oil-immersed transformer and the surrounding environment, and the transformer generates large vibration and noise during operation, so that the service life of the electrical devices is affected.

Based on the technical scheme, the invention designs the oil-immersed transformer based on the cooling protection device to solve the problems.

Disclosure of Invention

The invention aims to provide an oil-immersed transformer based on a cooling protection device, so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: an oil-immersed transformer based on a cooling protection device comprises a shell, wherein a recovery water tank is arranged at the bottom end of the shell, support legs are symmetrically arranged at the bottom end of the recovery water tank in a left-right mode, movable plates are arranged in an inner cavity of the shell in a sliding mode, the two movable plates are respectively arranged on the upper side and the lower side of the inner cavity of the shell, damping springs are uniformly arranged between the surfaces, away from each other, of the movable plates and the shell, limiting support battens are arranged on the surfaces, close to each other, of the movable plates, a transformer body is arranged between the upper limiting support battens and the lower limiting support battens, a first through hole is formed in the middle of the left side wall of the shell, a water curtain grid is arranged in the first through hole, a water storage tank is arranged in the middle of the top, a return pipe is arranged between the lower part of the right side wall of the recovery water tank and the water storage tank, a water pump is arranged on the return pipe close to the position of the water storage tank, a second opening is formed in the middle of the right side wall of the shell, and a negative pressure fan is arranged in the second opening.

Preferably, an isolation net is arranged on the outer side of the negative pressure fan, an isolation net cover is arranged at an outer port of the first port, and a water absorption rod is arranged on the right side of the water curtain mesh.

Preferably, fluffy cotton wool is wound on the water absorption rods, the water absorption rods are provided with a plurality of groups, and the distance between every two adjacent water absorption rods is 1-2 cm.

Preferably, the upper side of the water storage tank is provided with a rain collecting cover, the lower side of the water outlet pipe end is communicated with the top end of the water storage tank, and the water outlet pipe is provided with a water valve.

Preferably, the return pipe is provided with a filtering and purifying box.

Preferably, the supporting strip plates comprise two U-shaped strips, the two U-shaped strips are arranged in a vertical crossing mode, and supporting strips are arranged at the bottom ends of the U-shaped strips.

Compared with the prior art, the invention has the beneficial effects that: when the transformer cooling device is used, the water curtain is formed on the cooling water curtain, the water curtain is combined with the negative pressure fan, the water evaporation heat absorption principle is utilized, the temperature in the shell is quickly reduced, the effect of cooling and radiating the transformer body is achieved, the cooling environment-friendly effect and the power-saving effect are not possessed by other cooling devices, the water loss can be effectively reduced through the arranged water flow recovery system, outdoor rainwater can be collected through the arranged rainwater collection cover, and the damage of vibration to equipment electrical devices during working can be effectively weakened through the arranged damping spring.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a support strip structure according to the present invention;

FIG. 3 is a schematic view of the distribution of water absorbing rods according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: an oil-immersed transformer based on a cooling protection device comprises a shell 1, a recovery water tank 2 is arranged at the bottom end of the shell 1, support legs 3 are symmetrically arranged at the bottom end of the recovery water tank 2 in a bilateral mode, movable plates 4 are slidably arranged in an inner cavity of the shell 1, two movable plates 4 are arranged on the upper side and the lower side of the inner cavity of the shell 1 respectively, damping springs 5 are uniformly arranged between one surfaces, away from each other, of the movable plates 4 and the shell 1, limiting support strips 6 are arranged on one surfaces, close to each other, of the movable plates 4, a transformer body 7 is arranged between the upper limiting support strips 6 and the lower limiting support strips 6, a first through hole 8 is formed in the middle of the left side wall of the shell 1, a water curtain grid 9 is arranged in the first through hole 8, a water storage tank 10 is arranged in the middle of the top end of the shell 1, a return pipe 14 is arranged between the lower part of the right side wall of the recovery water tank 2 and the water storage tank 10, a water pump 11 is arranged on the position, close to the water storage tank 10, on the return pipe 14, a second opening 15 is formed in the middle of the right side wall of the shell 1, and a negative pressure fan 16 is arranged in the second opening 15.

Further, an isolation net 17 is arranged outside the negative pressure fan 16, an isolation net cover 18 is arranged at an outer port of the first port 8, and a water absorption rod 19 is arranged on the right side of the water curtain grid 9.

Furthermore, fluffy cotton wool is wound on the water absorption rods 19, the water absorption rods 19 are provided with a plurality of groups, and the distance between every two adjacent water absorption rods 19 is 1-2 cm.

Furthermore, the upper side of the water storage tank 10 is provided with a rain collecting cover 20, the lower side water outlet pipe end is communicated with the top end of the water storage tank 10, and the water outlet pipe 21 is provided with a water valve 21.

Further, the return pipe 14 is provided with a filtering purification tank 22.

Further, the supporting strip plate 6 comprises two U-shaped strips 61, the two U-shaped strips 61 are vertically crossed, and the bottom ends of the U-shaped strips 61 are provided with supporting strips 63.

One specific application of this embodiment is: the device is an oil-immersed transformer based on a cooling protection device, and electric devices in the device are electrically connected with an external power supply through external control switches.

When the cooling and heat dissipation device is used, clear water is injected into the water storage tank 10, the valve on the water guide pipe 12 is opened, water flow enters the water curtain grids 9 and flows downwards to form a water curtain, the negative pressure fan 17 is started, flowing air from left to right is formed in the shell 1, the temperature in the shell 1 is rapidly reduced by utilizing the water evaporation heat absorption principle, the effect of cooling and heat dissipation of the transformer body 7 is achieved, and the cooling, environment-friendly effect and the power saving effect are not possessed by other cooling equipment.

The residual water flow which flows down enters the recovery water tank 2 for storage, the water can be pumped into the water storage tank 10 by the water pump 11 for reuse, and the filtering and purifying tank 22 can play a purifying role;

in rainy days, the rain collecting cover 20 collects rainwater, and the valve 21 is opened to collect and utilize the rainwater (a filtering device can be arranged on the rain collecting cover to purify the rainwater).

The vibrations that equipment during operation produced can weaken by a wide margin through damping spring 5, effective shock attenuation.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. The utility model provides an oil-immersed transformer based on cooling protection device, including casing (1), its characterized in that: the water recycling device is characterized in that a recycling water tank (2) is arranged at the bottom end of the shell (1), support legs (3) are symmetrically arranged at the bottom end of the recycling water tank (2) in a bilateral mode, two movable plates (4) are arranged in the inner cavity of the shell (1) in a sliding mode, damping springs (5) are uniformly arranged between one surface, away from each other, of the two movable plates (4) and the shell (1), limiting support battens (6) are arranged on one surface, close to each other, of the movable plates (4), a transformer body (7) is arranged between the upper limiting support battens and the lower limiting support battens (6), a first through hole (8) is formed in the middle of the left side wall of the shell (1), a water curtain grid (9) is arranged in the first through hole (8), and a water storage tank (10) is arranged in the, be provided with aqueduct (12) between water storage box (10) left side lower part and cascade net (9) top, be connected with return line (13) between cascade net (9) bottom and recovery water tank (2), be provided with back flow (14) between recovery water tank (2) right side wall lower part and water storage box (10), be close to water storage box (10) position on back flow (14) and be provided with water pump (11), second opening (15) have been seted up at casing (1) right side wall middle part, be provided with negative pressure fan (16) in second opening (15).

2. The oil-immersed transformer based on the cooling protection device according to claim 1, characterized in that: an isolation net (17) is arranged on the outer side of the negative pressure fan (16), an isolation net cover (18) is arranged at an outer port of the first through hole (8), and a water absorption rod (19) is arranged on the right side of the water curtain grid (9).

3. An oil-filled transformer based on a cooling protection device according to claim 2, characterized in that: fluffy cotton wool is wound on the water absorption rods (19), the water absorption rods (19) are provided with a plurality of groups, and the distance between every two adjacent water absorption rods (19) is 1-2 cm.

4. An oil-filled transformer based on a cooling protection device according to claim 3, characterized in that: the upper side of the water storage tank (10) is provided with a rain collecting cover (20), the lower side of the water outlet pipe end is communicated with the top end of the water storage tank (10), and a water valve (21) is arranged on the water outlet pipe (21).

5. An oil-filled transformer based on a cooling protection device according to claim 4, characterized in that: the return pipe (14) is provided with a filtering and purifying box (22).

6. An oil-filled transformer based on a cooling protection device according to claim 5, characterized in that: the support batten (6) comprises two U-shaped strips (61), the two U-shaped strips (61) are perpendicularly crossed, and support bars (63) are arranged at the bottom ends of the U-shaped strips (61).