阅读说明：本技术 一种油浸变压器及方法 (Oil-immersed transformer and method ) 是由 魏伟健 于 2019-04-18 设计创作，主要内容包括：本发明公开了一种油浸变压器及方法,其结构包括箱壳、析水剔除装置、电线圈、油箱、散热板、电压盖板。有益效果：通过沉淀的水被沙层与棉层的吸附,且沙层与水与油的吸附特性不同将水与底部变压器油做有效隔离,同时刷毛条在旋转盘的作用下对电线圈底部的粘稠变压器油进行来回的刮蹭,以实现电线圈底部覆盖有较厚重的变压器油且该油内含有大量的水分进行剔除,从而对其起步进行金属腐蚀,而腐蚀金属所产生的金属盐离子又会变成变压器油氧化作用的催化剂,U型导热管在加热的作用下对周着环境产生热量,使其温度升高从而对经由棉层吸附的水分进行热量的蒸发处理,因U型导热管其较低于棉层0.5cm,故而给予棉层吸水炮和膨胀的空间。(The invention discloses an oil immersed transformer and a method thereof. Has the advantages that: the water and the transformer oil at the bottom are effectively isolated by the adsorption of the sand layer and the cotton layer through the different adsorption characteristics of the sand layer and the water and the oil, meanwhile, the brush wool strips scrape the viscous transformer oil at the bottom of the electric coil back and forth under the action of the rotating disk, so that the thick transformer oil covers the bottom of the electric coil, a large amount of water is contained in the transformer oil and is removed, metal corrosion is carried out when the transformer oil starts, metal salt ions generated by the corrosion of the metal become a catalyst for the oxidation of the transformer oil, the U-shaped heat conduction pipe generates heat to the surrounding environment under the heating action, the temperature of the U-shaped heat conduction pipe is increased, and the water adsorbed by the cotton layer is evaporated, and the U-shaped heat conduction pipe is lower than the cotton layer by 0.5cm, so that the cotton layer is provided with a water absorption cannon and an expanded space.)

1. The utility model provides an oil-immersed transformer that has water when low temperature and analyse and reject function, its structure includes case shell (1), separates water and rejects device (2), electric coil (3), oil tank (4), heating panel (5), voltage apron (6), its characterized in that: the water separating and removing device (2) is arranged at the inner lower part of the case shell (1) and is connected with the water separating and removing device through electric welding, the electric coil (3) is arranged on the upper surface of the water separating and removing device (2) and is connected with the water separating and removing device through buckling, the oil tank (4) is arranged on the inner side of the case shell (1) and is of an integrated structure, the heat dissipation plate (5) is provided with a plurality of heat dissipation plates which are uniformly arranged on the front surface of the case shell (1) at equal intervals and are vertically connected with the water separating and removing device through electric welding, and the voltage cover plate (6;

precipitation removing devices (2) are including rejecting board (20), electricity digestion structure (21), scrape a set mechanism (22), electricity digestion structure (21) are located and are rejected bottom and electricity in board (20) and connect, scrape a set mechanism (22) and locate in rejecting board (20) middle part and be connected through the electric welding with electricity digestion structure (21), reject board (20) including rectangle recess (201), U type buckle (202), surface course (203), sand bed (204), cotton layer (205), it is equipped with rectangle recess (201) and structure as an organic whole to reject in board (20) middle part, U type buckle (202) are equipped with two and opening part and are symmetry form respectively and install in rectangle recess (201) upper surface, U type buckle (202) are connected through the electric welding with rectangle recess (201), reject board (20) surface material from last to down by surface course (203) respectively, A sand layer (204) and a cotton layer (205).

2. The oil-immersed transformer with the elutriation and removal function at the low temperature according to claim 1, characterized in that: cotton layer (205) are the absorbent cotton material, electricity evaporation structure (21) include electric element (210), current conducting plate (211), U type heat pipe (212), electric element (210) with scrape a mechanism (22) electricity and be connected, current conducting plate (211) are equipped with two altogether and install respectively in electric element (210) left and right sides, current conducting plate (211) are connected with electric element (210) electricity, U type heat pipe (212) are equipped with a plurality of roots and are vertical form respectively and install in current conducting plate (211) upper surface, U type heat pipe (212) are connected perpendicularly through the electric welding in current conducting plate (211).

3. Oil transformer and method according to any of claims 1-2, characterized in that:

transformer oil is filled in the oil tank (4) to insulate and protect the electric coil (3), the electric coil (3) is placed on the rectangular groove (201) and is buckled and fixed through the U-shaped buckle plate (202), when the operating temperature in the tank shell (1) is low, the solubility of the transformer oil is reduced when the temperature of water dissolved in the transformer oil is low, the water is dissolved and separated out through the cannon, and therefore large water drops and transformer oil are separated and deposited, and the deposited water is heavier than the transformer oil and sinks to the bottom of the transformer;

the transformer oil is operated in a low-temperature environment for a long time, the viscosity of the transformer oil is increased, a large amount of moisture is separated out, the kinetic energy of water molecules is small along with the large amount of moisture, the water molecules are easy to gather under a high-intensity electric field in a gap between current bridge paper boards, so that the insulating paper is damaged, more moisture and limiting impurities are generated, the transformer oil is changed in quality, the moisture in the oil is oxidized with the insulating oil to form high-molecular organic acid, the metal in the transformer is corroded, the breakdown strength of the oil paper insulation is sharply reduced, and finally accidents are caused;

therefore, the water precipitated in the box shell (1) is subjected to concentrated absorption treatment through the water precipitation removing device (2), and the water precipitated from the transformer oil at the bottom of the equipment is precipitated under low-temperature operation, and the sand has good water absorption and heat insulation on the water, so that the water penetrates into the sand layer (204) through the surface layer (203), and the water absorption of the cotton layer (205) is stronger than that of the sand layer (204);

the cotton layer (205) absorbs the moisture absorbed by the sand layer (204) again, the electric element (210) is electrified, the driving rod (221) connected with the electric element (210) performs rotary motion under the action of the electric element (210), the rotary disc (222) connected with the electric element (210) performs rotary motion, and the brush hair strips (223) arranged on the surface of the rotary disc (222) perform back and forth scraping on the transformer oil adhered to the bottom of the electric coil (3) under rotation, so that the cleaning of the viscous transformer oil at the bottom of the rotary disc is realized, and the phenomenon that a large amount of moisture contained in the viscous transformer oil at the bottom of the transformer oil is corroded to metals is avoided;

meanwhile, the conductive plate (211) connected with the electric element (210) generates electricity under the action of the conductive plate, so that the U-shaped heat pipe (212) is heated to generate heat, and the heat cannot directly contact with the cotton layer (205) to damage the cotton layer (205) because the distance between the U-shaped heat pipe (212) and the cotton layer (205) is 0.5cm, so that the moisture absorbed by the cotton layer (205) is gradually evaporated under the action of the surrounding heat, the moisture is treated, and the sand layer (204) has good heat insulation property, so that the heat generated by the U-shaped heat pipe (212) cannot influence transformer oil in the oil tank (4).

Technical Field

The invention relates to the field of transformers, in particular to an oil immersed transformer and a method.

Background

For a large power plant, a main transformer, a service transformer, etc. with a large capacity and a high voltage class are regarded as core main equipment for power generation production, and are regarded as important in a series of operations such as operation, maintenance, and use, and the transformers are divided into: dry-type transformer, oil immersed transformer, wherein oil immersed transformer is then very popular, but the oil immersed transformer on the existing market has following shortcoming:

1. when the temperature of water dissolved in transformer oil is lower, the solubility of the transformer oil is reduced, the water is dissolved and separated out, so that large water drops are formed to be separated and deposited from the transformer oil, the specific gravity of the deposited water is higher than that of the transformer oil, the water content is high, the metal corrosion reaction speed is higher, and metal salt ions generated by corrosion metal become a catalyst for the oxidation of the transformer oil.

2. And as the transformer operates in a low-temperature environment for a long time, the viscosity of the transformer oil is increased, a large amount of moisture is separated out, and with the increase of the moisture, the kinetic energy of water molecules is small, so that the water molecules are easily gathered in a gap between current bridge paper boards under a high strong electric field, the insulation paper is damaged, more moisture and limiting impurities are generated, the transformer oil is changed in quality, the moisture in the oil is oxidized with the insulation oil to form polymer organic acid, the metal in the transformer is corroded under the combined action of the polymer organic acid, the breakdown strength of the insulation of the oil paper is sharply reduced, and finally, an accident is caused.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide an oil-immersed transformer and a method thereof, which solve the problems that the solubility of the transformer oil is reduced when the temperature of water dissolved in the transformer oil is lower, the water is separated out due to the dissolution of the transformer oil, so that large water drops are separated from the transformer oil and deposited, the specific gravity of the deposited water is higher than that of the transformer oil, the moisture content is high, the metal corrosion reaction speed is higher, metal salt ions generated by corrosion metal become a catalyst for the oxidation of the transformer oil, the viscosity of the transformer oil is increased and a large amount of moisture is separated out due to the long-term operation of the transformer in a low-temperature environment, the kinetic energy of water molecules is smaller, the water molecules are easy to gather under a high-intensity electric field in a gap between current bridge paper boards, so that the insulating paper is damaged and more moisture and limiting impurities are generated, therefore, the quality of the transformer oil is changed, and the moisture in the transformer oil and the insulating oil are oxidized to form high molecular organic acid which jointly acts to corrode metal in the transformer, so that the breakdown strength of the oil paper insulation is sharply reduced, and finally, the defect of an accident is caused.

In order to achieve the purpose, the invention is realized by the following technical scheme:

the utility model provides an oil-immersed transformer and method, its structure includes case shell, precipitation removing devices, electric coil, oil tank, heating panel, voltage apron, precipitation removing devices locates the lower part in the case shell and is connected through the electric welding, the electric coil is located precipitation removing devices upper surface and is connected through the lock, the inboard and the integral structure of case shell is located to the oil tank, the heating panel is equipped with a plurality of and is even equidistance form and installs in case shell front surface and vertically be connected through the electric welding, the voltage apron is installed in case shell upper surface and is connected through the electric welding, precipitation removing devices is including rejecting board, electric evaporation structure, scraping and collecting the mechanism, the electric evaporation structure locates and rejects the bottom and electricity and connects in the board, it collects the mechanism and locates and rejects the inboard middle part of board and is connected through the electric welding with the electric evaporation structure to scrape.

According to a further scheme of the invention, the rejection plate comprises rectangular grooves, U-shaped buckle plates, surface layers, sand layers and cotton layers, the rectangular grooves are formed in the middle of the inside of the rejection plate and are of an integrated structure, the U-shaped buckle plates are provided with two U-shaped buckle plates, openings of the two U-shaped buckle plates are symmetrically arranged on the upper surfaces of the rectangular grooves, the U-shaped buckle plates are connected with the rectangular grooves through electric welding, the surface materials of the rejection plate respectively comprise the surface layers, the sand layers and the cotton layers from top to bottom, and concentrated adsorption on water deposited at the bottom at low temperature is favorably realized.

As a further scheme of the invention, the cotton layer is made of absorbent cotton material, which is beneficial to absorbing water.

As a further scheme of the present invention, the electric evaporation structure includes an electric element, two current-conducting plates and a U-shaped heat-conducting pipe, the electric element is electrically connected to the scraping mechanism, the two current-conducting plates are respectively installed on the left side and the right side of the electric element, the current-conducting plates are electrically connected to the electric element, the U-shaped heat-conducting pipe is provided with a plurality of pieces and is respectively installed on the upper surface of the current-conducting plate in a vertical manner, the U-shaped heat-conducting pipe is vertically connected to the current-conducting plates through electric welding, and the post-drying treatment of the absorbed.

As a further scheme of the invention, the height of the U-shaped heat conduction pipe is lower than that of the cotton layer by 0.5cm, so that the cotton layer is prevented from being damaged due to direct collision between the cotton layer and the U-shaped heat conduction pipe.

According to a further scheme of the invention, the scraping and collecting mechanism comprises an insulating sheath, a driving rod, a rotating disk, a plurality of brush strips and hollow holes, the lower end of the driving rod penetrates through the insulating sheath to be electrically connected with an electric element, the rotating disk is installed at the upper end of the driving rod and is connected with the upper end of the driving rod through electric welding, the plurality of brush strips are respectively installed on the upper surface of the rotating disk, the plurality of hollow holes are respectively arranged on the surface of the rotating disk, the hollow holes and the rotating disk are of an integrated structure, water absorption treatment on water adsorbed at the bottom of a current bridge is facilitated, and the phenomenon that oil at the bottom of the current bridge is increasingly viscous is avoided, so that the breakdown strength of the oiled.

As a further scheme of the invention, the brush hair strips are made of materials with strong water absorption, so that the brush hair strips are beneficial to realizing back-and-forth touch of the oiled paper at the bottom of the current bridge, and the moisture in the brush hair strips is adsorbed.

In a further aspect of the present invention, the rotating disc is made of a heat insulating material.

Advantageous effects of the invention

Compared with the traditional oil immersed transformer, the invention has the following beneficial effects:

the invention utilizes the arranged eliminating plate to adsorb the water deposited at the bottom through the sand layer and the cotton layer, thereby effectively isolating the water from the transformer oil at the bottom by utilizing the adsorption characteristics of the sand layer, the water and the oil, and simultaneously scraping the viscous transformer oil at the bottom of the electric coil back and forth through the brush wool strip under the action of the rotating disk, so as to realize that the bottom of the electric coil is covered with the thicker transformer oil and the oil contains a large amount of water to be eliminated, thereby carrying out metal corrosion on the oil when the oil is started, and metal salt ions generated by corroding metals can become a catalyst for the oxidation of the transformer oil.

The invention utilizes the U-shaped heat conduction pipe to generate heat to the surrounding environment under the heating effect, so that the temperature of the U-shaped heat conduction pipe is increased, the heat evaporation treatment is carried out on the moisture absorbed by the cotton layer, and meanwhile, the U-shaped heat conduction pipe is 0.5cm lower than the cotton layer, so that the U-shaped heat conduction pipe gives a water absorption cannon and an expansion space to the cotton layer.

Drawings

Other features, objects and advantages of the invention will become more apparent from a reading of the detailed description of non-limiting embodiments with reference to the attached drawings.

In the drawings:

fig. 1 is a schematic structural diagram of an oil immersed transformer and a method according to the present invention.

FIG. 2 is a front cut-away view of the water separation and removal device of the present invention.

FIG. 3 is a schematic top view of the water separation and removal device of the present invention.

Fig. 4 is a schematic top view of the conductive plate of the present invention.

Fig. 5 is a right side view structural view of the U-shaped heat pipe of the present invention.

In the figure: the device comprises a box shell-1, a water precipitation removing device-2, an electric coil-3, an oil tank-4, a heat dissipation plate-5, a voltage cover plate-6, a removing plate-20, an electric evaporation structure-21, a scraping mechanism-22, a rectangular groove-201, a U-shaped buckle plate-202, a surface layer-203, a sand layer-204, a cotton layer-205, an electric element-210, an electric conduction plate-211, a U-shaped heat conduction pipe-212, an insulating sheath-220, a driving rod-221, a rotating disk-222, a bristle bar-223 and a hollow hole-224.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 to 5, the present invention provides a technical solution of an oil-immersed transformer and a method thereof:

as shown in fig. 1-2, the oil-immersed transformer and the method thereof structurally comprise a box shell 1, a water separation and removal device 2, an electric coil 3, an oil tank 4, a heat dissipation plate 5 and a voltage cover plate 6, the water separating and removing device 2 is arranged at the lower part in the case shell 1 and is connected with the case shell by electric welding, the electric coil 3 is arranged on the upper surface of the water separating and removing device 2 and is connected with the case shell by buckling, the oil tank 4 is arranged on the inner side of the case shell 1 and is of an integrated structure, the heat dissipation plates 5 are arranged on the front surface of the case shell 1 in an even and equidistant manner and are vertically connected through electric welding, the voltage cover plate 6 is arranged on the upper surface of the case shell 1 and is connected with the case shell by electric welding, the water separation and removal device 2 comprises a removal plate 20, an electric evaporation structure 21 and a scraping and collecting mechanism 22, the electric evaporation structure 21 is arranged at the bottom in the rejection plate 20 and is electrically connected, and the scraping mechanism 22 is arranged at the middle in the rejection plate 20 and is connected with the electric evaporation structure 21 through electric welding.

As shown in fig. 2-3, reject board 20 and include rectangle recess 201, U type buckle 202, surface course 203, husky layer 204, cotton layer 205, the middle part is equipped with rectangle recess 201 and is the integral structure in rejecting board 20, U type buckle 202 is equipped with two and the opening part is symmetry form respectively and installs in rectangle recess 201 upper surface, U type buckle 202 is connected through the electric welding with rectangle recess 201, reject board 20 surface material from last to down constitute by surface course 203, husky layer 204, cotton layer 205 respectively, be favorable to realizing depositing when low temperature and do concentrated absorption at bottom water.

As shown in fig. 2, the cotton layer 205 is absorbent cotton material, which is beneficial to absorbing water.

As shown in fig. 2, the evaporation structure 21 includes an electric element 210, two conductive plates 211, and a U-shaped heat pipe 212, the electric element 210 is electrically connected to the scraping mechanism 22, the two conductive plates 211 are provided in total and are respectively installed on the left and right sides of the electric element 210, the conductive plates 211 are electrically connected to the electric element 210, the U-shaped heat pipe 212 is provided with a plurality of pieces and is respectively installed on the upper surface of the conductive plate 211 in a vertical manner, and the U-shaped heat pipe 212 is vertically connected to the conductive plates 211 through electric welding, so as to perform a later-stage drying process on the absorbed water.

As shown in fig. 2 to 5, the height of the U-shaped heat conducting pipe 212 is 0.5cm lower than the height of the cotton layer 205, so as to prevent the cotton layer 205 from being damaged due to direct collision between the cotton layer 205 and the U-shaped heat conducting pipe 212.

As shown in fig. 2-3, the scraping and collecting mechanism 22 includes an insulating sheath 220, a driving rod 221, a rotating disk 222, bristle bars 223, and hollow holes 224, the lower end of the driving rod 221 penetrates through the insulating sheath 220 to be electrically connected with the electrical element 210, the rotating disk 222 is installed at the upper end of the driving rod 221 and connected with the driving rod 221 through electric welding, the bristle bars 223 are provided with a plurality of holes and are respectively installed on the upper surface of the rotating disk 222, the hollow holes 224 are respectively installed on the surface of the rotating disk 222, the hollow holes 224 and the rotating disk 222 are integrated, which is beneficial to performing water absorption treatment on water absorbed at the bottom of a current bridge, and preventing oil at the bottom of the current bridge from becoming more viscous, so that the breakdown strength of the oiled paper insulating structure is reduced.

As shown in fig. 2-3, the bristle strips 223 are made of a material with a strong water absorption property, which is beneficial to the fact that the oiled paper at the bottom of the current bridge is touched back and forth, so as to adsorb the moisture in the oiled paper.

As shown in fig. 2-3, the rotating disk 222 is made of a heat insulating material.

In summary, the moisture at the bottom of the sediment at low temperature is adsorbed by the removing plate 20, and the grease at the bottom of the current bridge is scraped by the scraping mechanism 22, so that the moisture contained in the sediment is adsorbed, and the moisture collected by the removing plate 20 and the scraping mechanism 22 is evaporated under the action of the scraping mechanism 21.

The specific realization principle is as follows: the transformer oil is filled in the oil tank 4 to insulate and protect the electric coil 3, the electric coil 3 is placed on the rectangular groove 201 and is buckled and fixed through the U-shaped buckle plate 202, when the operation temperature in the tank shell 1 is lower, the water dissolved in the transformer oil is at a lower temperature, the solubility of the transformer oil is reduced, the water is separated out due to dissolution through cannon, so that large water drops are separated and deposited from the transformer oil, the deposited water is heavier than the transformer oil and is deposited at the bottom of the transformer, the viscosity of the transformer oil is increased due to the long-term operation of the transformer in a low-temperature environment, a large amount of water is separated out, along with the large amount of water, the kinetic energy of water molecules is smaller, the water molecules are easily gathered under a high electric field in a gap between current bridge paper plates, so that the insulating paper is damaged, more water and limiting impurities are generated, and the quality change of the transformer oil is caused, and the water in the oil can also be oxidized with the insulating oil to form polymer organic acid to corrode the metal in the transformer under the combined action, so that the breakdown strength of the oil paper insulation is reduced rapidly, and finally an accident is caused, therefore, the water precipitated in the box shell 1 is absorbed concentratedly by the water precipitation removing device 2, the water precipitated from the transformer oil is precipitated at the bottom of the equipment under the low-temperature operation, as sand has good water absorption and heat insulation for the water, the water permeates into the sand layer 204 through the surface layer 203, the water absorption of the cotton layer 205 is stronger than that of the sand layer 204, the water absorbed by the sand layer 204 is absorbed again by the cotton layer 205, the driving rod 221 connected with the electric element 210 by electrifying is rotated under the action of the electric element 210, so that the rotating disc 222 connected with the driving rod is rotated, the brush strip 223 arranged on the surface of the rotating disc 222 is rotated to scrape the transformer oil adhered to the bottom of the electric coil 3 back and forth, therefore, the cleaning of the viscous transformer oil at the bottom of the transformer oil is realized, so that the phenomenon that a large amount of moisture contained in the viscous transformer oil at the bottom of the transformer oil corrodes metal is avoided, meanwhile, the conducting plate 211 connected with the electric element 210 generates electric power under the action of the conducting plate 211, so that the U-shaped heat pipe 212 is heated to generate heat, the heat cannot directly contact with the cotton layer 205 to damage the cotton layer 205 because the distance between the U-shaped heat pipe 212 and the cotton layer 205 is 0.5cm, the moisture absorbed by the cotton layer 205 is gradually evaporated under the action of the surrounding heat, the moisture treatment is realized, and the transformer oil in the oil tank 4 cannot be influenced by the heat generated by the U-shaped heat pipe 212 because the sand layer 204 has good heat insulation property.

The invention solves the problems that the water dissolved in the transformer oil in the prior art is dissolved in the transformer oil at a lower temperature, the solubility of the transformer oil is reduced, the water is separated out due to dissolution through a cannon, so that large water drops are formed and separated from the transformer oil, the water content is high due to the fact that the specific gravity of the deposited water is higher than that of the transformer oil, the metal corrosion reaction speed is higher, metal salt ions generated by corrosion metal become a catalyst for the oxidation of the transformer oil, the viscosity of the transformer oil is increased due to the fact that the transformer operates in a low-temperature environment for a long time, a large amount of water is separated out, the kinetic energy of water molecules is smaller along with the large increase of the water, the water molecules are easy to gather under a high-strength electric field in a gap between current bridge paper boards, so that insulating paper is damaged, more water and limiting impurities are generated, the quality change of the transformer oil is caused, and the water in the oil can also be oxidized with the insulating oil to, the invention utilizes the arranged rejection plate to absorb the water deposited at the bottom through the sand layer and the cotton layer, thereby effectively isolating the water from the transformer oil at the bottom by utilizing the absorption characteristics of the sand layer, the water and the oil, and simultaneously utilizes the brush hair strips to scrape the viscous transformer oil at the bottom of the electric coil back and forth under the action of the rotating disk, so as to realize that the thick transformer oil is covered at the bottom of the electric coil and a large amount of water is contained in the oil to be rejected, thereby carrying out metal corrosion on the oil when the oil starts, metal salt ions generated by corrosion metal can become a catalyst for the oxidation of the transformer oil, and the U-shaped heat pipe is utilized to generate heat to the surrounding environment under the heating action, so that the temperature is increased, thereby carrying out heat evaporation treatment on the water absorbed by the cotton layer, meanwhile, the U-shaped heat conduction pipe is lower than the cotton layer by 0.5cm, so that the cotton layer is provided with a water absorption cannon and an expansion space.

While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.