CN112474039B

CN112474039B - Magnetic filtering device for purifying transformer oil

Info

Publication number: CN112474039B
Application number: CN202011204735.8A
Authority: CN
Inventors: 李健
Original assignee: CHANGCHUN SANDING TRANSFORMER CO LTD
Current assignee: CHANGCHUN SANDING TRANSFORMER CO LTD
Priority date: 2020-11-02
Filing date: 2020-11-02
Publication date: 2022-10-28
Anticipated expiration: 2040-11-02
Also published as: CN112474039A

Abstract

The invention discloses a magnetic filtering device for purifying transformer oil, which comprises a transformer shell and is characterized in that: the transformer comprises a transformer shell, and is characterized in that an iron core is arranged inside the transformer shell, a scraping and supplying device is arranged outside the iron core in a sliding manner, a filtering device is arranged on one side of the transformer shell and comprises a filtering shell, an annular fixing frame is correspondingly arranged inside the filtering shell, a separating sieve plate fixing plate is movably connected inside the annular fixing frame through a bearing, a separating sieve plate is embedded inside the separating sieve plate fixing plate, sieve holes are formed in the separating sieve plate, the inner walls of the sieve holes are made of magnetic materials, a gas dissolving pipe penetrates through the top of the filtering shell, the pipe orifice of the gas dissolving pipe is horn-shaped, an upper extrusion ball is arranged at the pipe orifice of the gas dissolving pipe and is in contact with the separating sieve plate fixing plate, and one end of the gas dissolving pipe is connected with a pressure gas dissolving tank.

Description

Magnetic filtering device for purifying transformer oil

Technical Field

The invention relates to the technical field of transformers, in particular to a magnetic filtering device for purifying transformer oil.

Background

The transformer oil and the oil-impregnated paper thereof are main insulating materials in the transformer, and play double roles of insulating and heat conducting. Therefore, the transformer oil needs to have high insulation strength in addition to good thermal conductivity. The iron core of oil-immersed transformer is made up by stacking silicon steel sheets with good magnetic conductivity, and it forms a closed magnetic flow path.

In the daily use process of the transformer, the silicon steel sheet is soaked in oil for a long time, and with repeated power-on and power-off of the coil and daily use, a trace amount of the silicon steel sheet can be separated out and soaked in the oil in a particle state, because the silicon content of the steel sheet on the outer layer is less, the particle residues of the silicon steel sheet are easy to magnetize after the coil is electrified and keep the magnetism for a long time and do not disappear, magnetic impurities can be suspended in the oil to influence the insulation effect of the silicon steel sheet, a small amount of the magnetic impurities can be easily adsorbed on the side wall of an element of the transformer to cause disorder of magnetic flux, and can not be easily absorbed by an oil purifier, but the blockage of the pipe orifice of the oil purifier can be aggravated, and the practicability is poor;

in addition, because complete air isolation cannot be achieved in the transformer, the surface silicon steel sheets and the micro water vapor in the air can be ionized under a high-pressure environment, so that the pit defect on the surface of the air end is caused, a slight disturbance phenomenon occasionally occurs during voltage transformation, and the voltage transformation effect of the transformer can be influenced.

Therefore, it is necessary to design a magnetic filtering device for purifying transformer oil with strong practicability and high transformation stability.

Disclosure of Invention

The invention aims to provide a magnetic filtering device for purifying transformer oil, which is used for solving the problems in the background technology.

In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides a transformer oil purification uses magnetic filter equipment, includes transformer housing, its characterized in that: the transformer comprises a transformer shell and is characterized in that an iron core is arranged inside the transformer shell, a scraping and supplying device is arranged outside the iron core in a sliding mode, and a filtering device is arranged on one side of the transformer shell.

According to the technical scheme, filter equipment is including filtering the shell, the inside correspondence of filtering the shell is provided with the fixed frame of annular, there is separation sieve fixed plate inside of the fixed frame of annular through bearing swing joint, the inside embedding of separation sieve fixed plate has the separation sieve, the sieve mesh has been seted up to the inside of separation sieve, the inner wall of sieve mesh is the magnetism material.

According to the technical scheme, the top of filtering the shell is run through and is provided with the dissolved air pipe, the mouth of pipe of dissolved air pipe is loudspeaker form, the mouth of pipe of dissolved air pipe is provided with the extrusion ball, go up the extrusion ball and contact with separation sieve fixed plate, the one end of dissolved air pipe is connected with pressure dissolved air tank, be provided with pressure transmitter and governing valve on the dissolved air pipe.

According to the technical scheme, the bottom of the filter shell is correspondingly provided with a flocculant pipe in a penetrating mode, the pipe opening of the flocculant pipe is in a horn shape, a lower extrusion ball is arranged at the pipe opening of the flocculant pipe, the two sides of the separation sieve plate fixing plate are fixed with cross bars in an annular welding mode, the cross bars are in contact with the lower extrusion ball, one end of the flocculant pipe is in through connection with a meshed flocculant tank, a hydraulic driving plate is arranged on the flocculant pipe in a rotating mode, the middle of the hydraulic driving plate is connected with a rotating shaft, roots blades are sleeved outside the rotating shaft, a pump shell is arranged outside the Roots blades, and the pump shell is in through connection with the meshed flocculant tank.

According to the technical scheme, the hydraulic drive plate is composed of a first drive plate and a second drive plate, the first drive plate is flush with the right end of the separation sieve plate fixing plate, and the second drive plate is flush with the left end of the separation sieve plate fixing plate.

According to the technical scheme, hydraulic oil is filled in the transformer shell, the density of the upper extrusion ball is smaller than that of the hydraulic oil, and the density of the lower extrusion ball is larger than that of the hydraulic oil.

According to the technical scheme, strike off replenishing device and include that a plurality of is the fan-shaped liquid bag that the circumference form distributes, the one end of fan-shaped liquid bag is inwards sunken to be provided with the internal contraction angle, soft magnet has been laid on average on the surface of fan-shaped liquid bag, one side of fan-shaped liquid bag is provided with the liquid bag, the inside sliding connection of liquid bag has gas baffle, gas baffle's middle part is provided with the pars contractilis, the both sides correspondence of liquid bag is provided with the gyro wheel, the outside winding of gyro wheel has the spiral spring, the one end of spiral spring is connected with gas baffle, the one end of liquid bag is connected with the valve.

According to the technical scheme, square grooves are formed in two sides of the fan-shaped liquid bag, contact wheels are evenly connected to the inner portions of the square grooves through bearings, and the contact wheels are in contact with the iron core.

According to the technical scheme, the fluted disc is arranged outside the filter shell, the motor is installed on one side of the transformer shell, and the gear shaft of the motor is meshed with the fluted disc.

According to the technical scheme, the surfaces of the upper extrusion ball and the lower extrusion ball are made of rubber, and the pipe orifices of the gas dissolving pipe and the flocculating agent pipe are provided with anti-skid grains.

Compared with the prior art, the invention has the following beneficial effects: according to the invention, the scraping and supplying device is arranged, so that the separated part of the silicon-containing iron core can be scraped, the incomplete part of the silicon-containing iron core is supplemented, the iron core is always in a regular shape, and the stability of transformation is maintained; through being provided with filter equipment, adsorb the filtration to magnetic impurities in normal time, add the flocculating agent when blockking up and get rid of magnetic impurities, let in pressure when needs carry out big washing to oil and dissolve gas, three kinds of forms filter transformer oil, have played better filter effect.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

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

FIG. 2 is a schematic view of a scraping supply apparatus according to the present invention;

FIG. 3 is a schematic view of the installation of the fluid infusion bag and the fan-shaped fluid bag of the present invention;

FIG. 4 is a schematic view of a partial structure of the filter device of the present invention;

FIG. 5 is a schematic diagram of the flocculation state of the filter shell according to the present invention;

FIG. 6 is a schematic illustration of the filter housing of the present invention in a centrifugal state;

FIG. 7 is a schematic view of the filter housing of the present invention in a filtration state;

in the figure: 1. a transformer housing; 2. an iron core; 3. a scraping and supplying device; 4. a filtration device; 31. a fan-shaped liquid sac; 32. a fluid infusion bag; 311. a square groove; 312. a contact wheel; 313. the angle is retracted; 321. a gas baffle; 322. a telescopic part; 323. a valve; 324. a roller; 325. a volute spiral spring; 41. a pressure dissolved air tank; 42. a mesh flocculant tank; 43. a gas dissolving pipe; 431. an upper extrusion ball; 432. adjusting a valve; 433. a pressure transmitter; 44. a flocculant pipe; 441. a lower extrusion ball; 45. an annular fixed frame; 451. a rail bar; 452. separating the sieve plate fixing plate; 453. separating the sieve plate; 46. a filter shell; 47. a hydraulic drive plate; 48. roots lobes; 481. a pump housing.

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 obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

Referring to fig. 1-7, the present invention provides the following technical solutions: the utility model provides a transformer oil purification uses magnetic filter equipment, includes transformer housing 1, its characterized in that: an iron core 2 is installed inside a transformer shell 1, a scraping and supplying device 3 is slidably arranged outside the iron core 2, a filtering device 4 is arranged on one side of the transformer shell 1, the filtering device 4 is used for filtering pressure oil in the transformer shell 1 and keeping the interior of the transformer clean, the transformer does not need to be manually opened to pump out all the oil for cleaning, manpower is saved, the scraping and supplying device 3 is used for scraping magnetized micro silicon steel sheet impurities on the surface of the iron core 2 and supplying pit defects after ionization, and stability of voltage transformation is maintained;

the filtering device 4 comprises a filtering shell 46, an annular fixing frame 45 is correspondingly arranged inside the filtering shell 46, a separating sieve plate fixing plate 452 is movably connected inside the annular fixing frame 45 through a bearing, a separating sieve plate 453 is embedded inside the separating sieve plate fixing plate 452, sieve holes are formed inside the separating sieve plate 453, the inner walls of the sieve holes are made of magnetic materials, when filtering is started, firstly, oil in the transformer shell 1 is introduced into the filtering shell 46, the oil can continuously leak out of the sieve holes when passing through the separating sieve plate 453, and meanwhile, magnetic impurities and other granular or blocky impurities can be throttled inside the sieve holes so as to filter the transformer oil, so that the purity of the transformer oil is maintained;

the top of the filtering shell 46 is provided with a dissolved air pipe 43 in a penetrating way, the pipe mouth of the dissolved air pipe 43 is in a horn shape, the pipe mouth of the dissolved air pipe 43 is provided with an upper extrusion ball 431, the upper extrusion ball 431 is contacted with the separating sieve plate fixing plate 451, one end of the dissolved air pipe 43 is connected with a pressure dissolved air tank 41, the dissolved air pipe 43 is provided with a pressure transmitter 433 and an adjusting valve 432, the pressure dissolved air tank 41 continuously introduces the pressure dissolved air into the dissolved air pipe 43 under normal conditions, because the pressure intensity in the filtering shell 46 is smaller, the dissolved air is diffused and absorbs and drives the small particle impurities in the pressure oil which can pass through the sieve holes upwards, the top of the filtering shell 46 is preferably provided with an exhaust pipe for absorbing the bubbles carrying the impurities, when the impurities accumulated on the separating sieve plate 453 are accumulated to a certain degree, the sieve holes are blocked and because the pressure of the hydraulic oil is larger and larger, the friction force formed by the upper extrusion ball 431 and the gas dissolving pipe 43 is overcome and the separation sieve plate fixing plate 452 is pushed to rotate to the position of 90 degrees, when the separation sieve plate fixing plate 452 inclines, the upper extrusion ball 431 loses the blocking force, a large amount of dissolved gas can be sprayed downwards, the separation sieve plate 453 is enabled to vibrate violently, magnetic impurities which are not contained in sieve holes are shaken off and taken away upwards, the magnetic impurities are still adsorbed inside the sieve holes, the separation of the magnetic impurities and the non-magnetic impurities is facilitated, the separation sieve plate 453 gradually returns to the original position along with the recovery of the sieve holes, meanwhile, the pressure transmitter 433 senses the reduction of the pressure, the regulating valve 432 is driven to reduce the opening degree of the sieve holes, the upper extrusion ball 431 floats upwards, the upper extrusion ball 431 is extruded upwards, the gas amount sprayed by the gas dissolving pipe 43 is reduced, the switching of two working modes is facilitated, and the intake of the dissolved gas is saved;

a flocculant pipe 44 is correspondingly arranged at the bottom of the filter shell 46 in a penetrating manner, the pipe orifice of the flocculant pipe 44 is in a horn shape, a lower extrusion ball 441 is arranged at the pipe orifice of the flocculant pipe 44, crosspieces 451 are fixed to two sides of a separation sieve plate fixing plate 452 in an annular welding manner, the crosspieces 451 are in contact with the lower extrusion ball 441, one end of the flocculant pipe 44 is in a penetrating manner connected with a mesh-shaped flocculant tank 42, a hydraulic drive plate 47 is arranged on the flocculant pipe 44 in a rotating manner, the middle of the hydraulic drive plate 47 is connected with a rotating shaft, roots blades 48 are sleeved outside the rotating shaft, a pump shell 481 is arranged outside the roots blades 48, the pump shell 481 is in a penetrating manner connected with the mesh-shaped flocculant tank 42, when the flocculant is accumulated to a certain degree, the separation sieve plate 453 deflects, the lower extrusion ball 441 is in contact with the crosspieces 451 and limits the hydraulic oil to be maintained at a position of 45-90 degrees, meanwhile, a large amount of hydraulic oil flows through, the sieve plate 47 starts to rotate, the rotating shaft and extrudes the mesh-shaped flocculant upwards until meshes of the separation 453, magnetic impurities are separated from the inner wall of the sieve holes by the inner wall of the sieve holes of the sieve plate by the flocculant, so as to completely recover the magnetic impurities;

the hydraulic drive plate 47 is composed of a first drive plate and a second drive plate, the first drive plate is flush with the right end of the separation sieve plate fixing plate 452, the second drive plate is flush with the left end of the separation sieve plate fixing plate 452, the first drive plate is driven by hydraulic power to rotate clockwise when the first drive plate starts to rotate, forward pumping is started, the second drive plate can rotate to 135 degrees when the second drive plate finishes clearing, at the moment, the lower extrusion ball 441 is clamped with the crosspiece 451 again, the second drive plate is driven by hydraulic power to rotate in the reverse direction, and the Roots blades 48 rotate in the reverse direction, so that the flocculant is sucked back to the original position, and the flocculant can be automatically recovered;

the transformer casing 1 is filled with hydraulic oil, the density of the upper extrusion ball 431 is smaller than that of the hydraulic oil, the density of the lower extrusion ball 441 is larger than that of the hydraulic oil, the upper extrusion ball 431 moves upwards to be attached to the top of the upper extrusion ball 431 when liquid pumping is finished, leakage of the transformer oil is prevented, and the lower extrusion ball 441 also prevents the hydraulic oil from leaking in when a flocculating agent does not overflow;

the scraping and replenishing device 3 comprises a plurality of fan-shaped liquid bags 31 distributed in a circumferential shape, one end of each fan-shaped liquid bag 31 is inwards recessed to form an inward-shrinking angle 313, soft magnets are evenly laid on the surfaces of the fan-shaped liquid bags 31, one side of each fan-shaped liquid bag 31 is provided with a replenishing liquid bag 32, an air baffle 321 is connected inside each replenishing liquid bag 32 in a sliding manner, the middle of each air baffle 321 is provided with a telescopic part 322, two sides of each replenishing liquid bag 32 are correspondingly provided with rollers 324, each roller 324 is wound with a volute spring 325, one end of each volute spring 325 is connected with the corresponding air baffle 321, one end of each replenishing liquid bag 32 is connected with a valve 323, when the iron core 2 needs to be replenished, each fan-shaped liquid bag 31 is preferably provided with a ball screw lifting platform, the lifting up and down can be realized, and the whole iron core 2 can be conveniently treated, when scraping is carried out, because the surface of the fan-shaped liquid bag 31 has magnetism, the fan-shaped liquid bag adsorbs magnetic impurities on the surface of the fan-shaped liquid bag 31 for scraping, meanwhile, when the surface of the fan-shaped liquid bag 31 is in friction with the surface of the iron core 2, the impurities are brought into the concave pits to form surface concave pit filling, and because the valve 323 can bring a small amount of iron core 2 particles into the surface of the retracted angle 313 when liquid is pumped to the fan-shaped liquid bag 31, the iron core 2 particles separated from the transformer oil can be collected, when the radius of the iron core 2 in the length direction is not constant due to the requirement of the transformer, the extending length of the retracted angle 313 can be changed by pumping liquid, the spiral spring 325 is more suitable for occasions with different diameters, and is used for providing a certain initial force, so that the fan-shaped liquid bag 31 can be always in contact with the iron core 2 to form extrusion force;

the two sides of the fan-shaped liquid bag 31 are provided with square grooves 311, the inside of each square groove 311 is uniformly connected with a contact wheel 312 through a bearing, the contact wheels 312 are in contact with the iron core 2, when the fan-shaped liquid bag 31 slides up and down on the surface of the iron core 2, the contact wheels 312 rub on the surface of the iron core, on one hand, the sliding resistance is reduced, on the other hand, the surface of the iron core 2 is compacted when the fan-shaped liquid bag rolls, and the smooth and compact degree of the surface of the iron core is improved;

when impurities in the filter shell 46 need to be centrifugally separated, firstly, the motor is started, an output shaft of the motor drives the fluted disc to rotate, then, the filter shell 46 rotates and centrifuges hydraulic oil, the impurities are thrown to the centers of the two separation sieve plates 453, at the moment, a large amount of liquid is pumped to a pipeline, the impurities are extruded by a slit between the two separation sieve plates 453 to form blocky precipitates and are deposited below, and a containing groove is preferably formed at the bottom of the filter shell 46 and used for containing the impurities;

the surfaces of the upper extrusion ball 431 and the lower extrusion ball 441 are made of rubber, the pipe openings of the gas dissolving pipe 43 and the flocculant pipe 44 are provided with anti-skidding lines, the anti-skidding lines are used for preventing the upper extrusion ball 431 and the lower extrusion ball 441 from sliding with the inner walls of the gas dissolving pipe 43 and the flocculant pipe 44, and gas or flocculant is prevented from leaking in a non-use state.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a transformer oil purification uses magnetic filtration device, includes transformer housing (1), its characterized in that: an iron core (2) is installed inside the transformer shell (1), a scraping and supplying device (3) is slidably arranged outside the iron core (2), and a filtering device (4) is arranged on one side of the transformer shell (1);

the filtering device (4) comprises a filtering shell (46), an annular fixing frame (45) is correspondingly arranged inside the filtering shell (46), a separating sieve plate fixing plate (452) is movably connected inside the annular fixing frame (45) through a bearing, a separating sieve plate (453) is embedded inside the separating sieve plate fixing plate (452), sieve holes are formed in the separating sieve plate (453), and the inner wall of each sieve hole is made of a magnetic material;

an air dissolving pipe (43) penetrates through the top of the filter shell (46), the pipe opening of the air dissolving pipe (43) is in a horn shape, an upper extrusion ball (431) is arranged at the pipe opening of the air dissolving pipe (43), the upper extrusion ball (431) is in contact with a separation sieve plate fixing plate (452), one end of the air dissolving pipe (43) is connected with a pressure air dissolving tank (41), and a pressure transmitter (433) and an adjusting valve (432) are arranged on the air dissolving pipe (43);

the bottom of the filter shell (46) is correspondingly provided with a flocculant pipe (44) in a penetrating mode, the pipe orifice of the flocculant pipe (44) is in a horn shape, a lower extrusion ball (441) is arranged at the pipe orifice of the flocculant pipe (44), transverse bars (451) are welded and fixed on two sides of the separation sieve plate fixing plate (452) in an annular mode, the transverse bars (451) are in contact with the lower extrusion ball (441), one end of the flocculant pipe (44) is in through connection with a meshed flocculant tank (42), a hydraulic drive plate (47) is arranged on the flocculant pipe (44) in a rotating mode, the middle of the hydraulic drive plate (47) is connected with a rotating shaft, a Roots blade (48) is sleeved outside the rotating shaft, a pump shell (481) is arranged outside the Roots blade (48), and the pump shell (481) is in through connection with the meshed flocculant tank (42).

2. The magnetic filtering device for purifying transformer oil according to claim 1, wherein: the hydraulic drive plate (47) comprises a first drive plate and a second drive plate, the first drive plate is flush with the right end of the separation sieve plate fixing plate (452), and the second drive plate is flush with the left end of the separation sieve plate fixing plate (452).

3. The magnetic filtering device for purifying transformer oil according to claim 2, wherein: the transformer shell (1) is filled with hydraulic oil, the density of the upper extrusion ball (431) is smaller than that of the hydraulic oil, and the density of the lower extrusion ball (441) is larger than that of the hydraulic oil.

4. The magnetic filtering device for purifying transformer oil according to claim 3, wherein: scraping replenishing device (3) includes that a plurality of is fan-shaped liquid bag (31) that the circumference form distributes, the one end of fan-shaped liquid bag (31) is inwards sunken to be provided with interior convergent angle (313), soft magnet has been laid on average on the surface of fan-shaped liquid bag (31), one side of fan-shaped liquid bag (31) is provided with fluid infusion bag (32), the inside sliding connection of fluid infusion bag (32) has gas baffle (321), the middle part of gas baffle (321) is provided with pars contractilis (322), the both sides correspondence of fluid infusion bag (32) is provided with gyro wheel (324), the outside of gyro wheel (324) is twined and is had volute spring (325), the one end of volute spring (325) is connected with gas baffle (321), the one end of fluid infusion bag (32) is connected with valve (323).

5. The magnetic filtering device for purifying transformer oil according to claim 4, wherein: the two sides of the fan-shaped liquid bag (31) are provided with square grooves (311), the inside of each square groove (311) is evenly connected with a contact wheel (312) through a bearing, and the contact wheels (312) are in contact with the iron core (2).

6. The magnetic filtering device for purifying transformer oil of claim 5, wherein: the outside of crossing filter shell (46) is provided with the fluted disc, the motor is installed to one side of transformer casing (1), the gear shaft and the fluted disc mesh of motor mutually.

7. The magnetic filtering device for purifying transformer oil of claim 6, wherein: the surfaces of the upper extrusion ball (431) and the lower extrusion ball (441) are made of rubber, and the orifices of the gas dissolving pipe (43) and the flocculating agent pipe (44) are provided with anti-skid grains.