CN209859754U

CN209859754U - Full-oil-filled sealed amorphous alloy oil-immersed transformer

Info

Publication number: CN209859754U
Application number: CN201920371171.3U
Authority: CN
Inventors: 张桂青; 江许燕
Original assignee: NANTONG XINYUAN ELECTRIC APPLIANCE MANUFACTURING Co Ltd
Current assignee: NANTONG XINYUAN ELECTRIC APPLIANCE MANUFACTURING Co Ltd
Priority date: 2019-03-22
Filing date: 2019-03-22
Publication date: 2019-12-27
Anticipated expiration: 2029-03-22

Abstract

The utility model discloses a full oil-filled canned type metallic glass oil-immersed transformer, which belongs to the technical field of transformers, and relates to a full oil-filled canned type metallic glass oil-immersed transformer, which can realize that the metallic glass replaces the traditional silicon steel sheet, the resistivity is 3-6 times of the silicon steel sheet, the load loss is reduced by 15%, the no-load loss is reduced by 70%, simultaneously, a full oil-filled canned type corrugated oil tank shell is adopted, permanent sealing is realized by the expansion of self elastic adaptive oil, an oil conservator and a respirator are replaced, the transformer oil is isolated from the outside, the reduction of the insulating performance caused by the entering of oxygen and moisture is effectively reduced, the percolation and cooling heat dissipation of the transformer oil are combined, simultaneously, the content of antioxidant is controlled based on the slow release principle, the oxidation deterioration speed of the transformer oil is obviously reduced, the oil-immersed transformer is ensured not to need to change oil in the normal operation period, the maintenance cost of the transformer is greatly reduced, and the service life of the transformer is prolonged.

Description

Full-oil-filled sealed amorphous alloy oil-immersed transformer

Technical Field

The utility model relates to a transformer technical field, more specifically say, relate to a full oil charge canned type metallic glass oil immersed transformer.

Background

The oil-immersed transformer is a novel high-performance transformer with more reasonable structure and better performance, and the three-dimensional wound core is characterized in that three core columns are arranged in an equilateral triangle in a three-dimensional mode, air gaps are not formed in magnetic circuits of the three-dimensional wound core, the winding is tighter, the lengths of the three magnetic circuits are consistent and shortest, and the cross-sectional area of the core columns of the three-dimensional wound core is closer to a circle, so that the performance is further improved, the loss is reduced, the noise is reduced, the three-dimensional wound core is balanced, and the third harmonic component is reduced. The main parts of the transformer comprise an iron core, a winding, an oil tank, an oil conservator, a respirator, an explosion-proof tube (a pressure relief valve), a radiator, an insulating sleeve, a tap switch, a gas relay, a thermometer, an oil purifier and the like, and between the silicon steel sheet layers of the oil-immersed transformer, the oil can permeate into the transformer after being immersed into the transformer for a long time, and the elasticity of the transformer oil plays a role in buffering, so that the oil-immersed transformer has low noise. However, the pressure regulating switch is arranged in the oil tank, the switch contact is not good and cannot be seen outside during pressure regulation, if the contact is not equal to the open circuit, if the contact is poor, the switch is easy to burn when the load is overlarge.

The transformer oil inevitably goes bad and goes bad in the using process, especially when foreign matters such as moisture, free carbon, oxide and mechanical impurities are mixed in the transformer oil, the aging and the going bad of the transformer are greatly accelerated, the online oil changing scheme in the prior art is to use an oil changing vehicle to change the oil of the running transformer, wherein the oil changing vehicle is connected with the lower end of a transformer oil conservator through a communicating pipe, and new oil is injected from the communicating pipe; the oil change vehicle is connected with a sampling valve at the bottom of the transformer and discharges old oil from the sampling valve, and the oil change process can realize automatic oil change by controlling the operation of an oil pump through a computer, and the scheme has the main defects that: in the process of oil change, new oil and old oil can be mixed, impurities such as fibers, acid and carbon particles contained in the old oil have higher concentration than the new oil and can spontaneously perform diffusion movement, so that the new oil is polluted by the old oil, and the significance of oil change is lost, the Chinese invention publication No. CN106531407B discloses an online oil change device and system for an oil-immersed transformer, which relate to the technical field of electric power, and the device comprises: the system comprises a first vacuum pump, a second vacuum pump, a new oil tank, a waste oil tank, an inert gas tank, a four-way joint and a three-way joint; the three-way joint is respectively connected with the exhaust pipe, the second air chamber and the second vacuum pump of the oil-immersed transformer through pipelines; a third air valve is arranged between the second vacuum pump and the three-way joint; a fourth air valve is arranged between the second air chamber and the three-way joint; a fifth air valve is arranged between the exhaust pipe and the three-way joint; the waste oil tank is connected with an oil discharge pipe of the oil-immersed transformer, so that the utility model can realize the physical isolation of new oil and old oil; when the oil immersed transformer is used for changing oil on line, components in the transformer oil tank and newly added transformer oil are not in contact with air, and the oxidation of the components in the transformer and the transformer oil is avoided.

Although the online oil changing device and the system of the oil-immersed transformer in the scheme can realize physical isolation of new oil and old oil, and ensure that components in an oil tank of the transformer and newly added transformer oil are not contacted with air when the oil-immersed transformer is changed online, the system has high operation cost and is complex, the problem of aging, deterioration and deterioration of the transformer oil is not solved at the source, the system is considered from the oil changing angle, the system is not in accordance with the environmental protection concept of sustainable development of the current society, the extra operation cost of the oil-immersed transformer is increased, the popularization and the development of the transformer are not facilitated, in the prior art, part of the oil-immersed transformer is provided with an oil purifier, and harmful substances such as moisture, free carbon and oxides in the transformer oil are adsorbed by silica gel filled in the oil purifier, so that the oil is purified and kept with good electrical and chemical properties, the service life is prolonged, reduce use cost, but only rely on the flow that transformer oil self thermosiphon produced to adsorb, adsorption effect is relatively poor on the one hand, and on the other hand can't prevent or slow down transformer oil's rotten oxidation problem, does not reach "make the best use of" to transformer oil far away, and it is costly in case need change oil.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved

Aiming at the problems in the prior art, the utility model aims to provide a full oil-filled sealed amorphous alloy oil-immersed transformer, which can realize the replacement of the traditional silicon steel sheet by amorphous alloy, the resistivity is 3-6 times of the silicon steel sheet, the load loss is reduced by 15%, the no-load loss is reduced by 70%, meanwhile, a fully oil-filled sealed corrugated oil tank shell is adopted, permanent sealing is realized by the expansion of self elastic adapting oil, an oil conservator and a respirator are replaced, the transformer oil is isolated from the outside, the entering of oxygen and moisture is effectively reduced, the reduction of the insulating property is caused, the percolation and cooling heat dissipation of the transformer oil are combined, the content of an antioxidant is controlled based on a slow release principle, the oxidation deterioration speed of the transformer oil is obviously reduced, the oil-immersed transformer is ensured not to be changed during the normal operation period, the maintenance cost of the transformer is greatly reduced, the service life of the transformer is prolonged.

2. Technical scheme

In order to solve the above problems, the utility model adopts the following technical proposal.

A full oil-filled sealed amorphous alloy oil-immersed transformer comprises a transformer body, wherein the transformer body comprises a corrugated oil tank shell, an iron core, a winding, a high-voltage lead, a low-voltage lead, an oil level indicator and an explosion-proof valve, radiators are fixedly connected to the peripheral side walls of the transformer body, the radiators and the transformer body are integrally formed, the iron core is made of amorphous alloy, four isolation covers which are uniformly distributed are fixedly connected to the outer end of the transformer body, a percolator is arranged in the middle of the isolation covers, a hot oil pipe is communicated between the upper end of the percolator and the upper end of the transformer body, a cold oil pipe is communicated between the lower end of the percolator and the lower end of the transformer body, first electromagnetic valves are respectively arranged on the hot oil pipe and the cold oil pipe, and the percolator comprises an upper cylinder body, a percolating rings and a lower, the upper barrel body, the percolation ring and the lower barrel body are provided with flange plates, a percolation regeneration mechanism is arranged in the percolation ring and comprises a slow release ball and a pair of active alumina bed layers, the slow release ball is clamped between the pair of active alumina bed layers, one side, far away from the slow release ball, of each active alumina bed layer is provided with a positioning filter screen, the positioning filter screens are clamped with the inner side wall of the percolation ring, a cooling mechanism is arranged on a cold oil pipe, amorphous alloy can be used for replacing a traditional silicon steel sheet, the resistivity is 3-6 times that of the silicon steel sheet, the load loss is reduced by 15%, the no-load loss is reduced by 70%, meanwhile, a fully oil-filled sealed type corrugated oil tank shell is adopted, permanent sealing is realized by self elastic adaptation to oil expansion, an oil storage cabinet and a respirator are replaced, transformer oil is isolated from the outside, and oxygen is effectively reduced, The insulation performance is reduced due to the entering of water, the percolation and cooling heat dissipation of the transformer oil are combined, the content of the antioxidant is controlled based on a slow release principle, the oxidative deterioration speed of the transformer oil is obviously reduced, the oil change of the oil-immersed transformer in a normal operation period is avoided, the maintenance cost of the transformer is greatly reduced, and the service life of the transformer is prolonged.

Further, cooling body includes cooling jacket, liquid reserve tank, circulating water pump, inlet tube and outlet pipe, and the cooling jacket parcel is at cold oil pipe surface outward, the inlet tube and liquid reserve tank intercommunication are passed through to the cooling jacket upper end, the tip passes through outlet pipe and liquid reserve tank intercommunication under the cooling jacket, and circulating water pump installs in the liquid reserve tank, relies on circulating water pump to improve the power of coolant circulation, and the coolant liquid carries out abundant cooling to cold oil pipe when the cooling jacket.

Furthermore, the cooling cover is internally and fixedly connected with a water-isolating ring, and water distribution holes distributed in an annular array are formed in the water-isolating ring, so that cooling liquid can flow down from the water distribution holes in the water-isolating ring conveniently and uniformly, the cooling area of the cold oil pipe is increased, and the cooling speed is accelerated.

Furthermore, a standby pipe is communicated between the hot oil pipe and the cold oil pipe, and a second electromagnetic valve is mounted on the standby pipe and used for maintaining normal flowing and cooling of the transformer oil.

Further, go up the stack shell left end and cut into and have gone up the inlet hole, go up downthehole threaded connection of inlet has first sealing plug, first sealing washer has been cup jointed on the first sealing washer, down the stack shell left end is cut into and is had a hole down, it has the second sealing washer to exit threaded connection down, the second sealing washer has been cup jointed on the second sealing washer, makes things convenient for the technical staff can be through letting in dry nitrogen gas and fresh oil in the ooze filter in proper order after changing the seepage regeneration mechanism to arrange the air in the ooze filter to the greatest extent for this internal transformer oil of transformer is difficult by air pollution.

Furthermore, a sealing gasket is clamped between the flange plates and is made of fluoroalkoxy phosphazene elastomer, the sealing gasket is arranged to improve the sealing performance when the upper barrel body, the percolation ring and the lower barrel body are connected through a flange, the fluoroalkoxy phosphazene elastomer is fluorinated phosphazene rubber, is novel semi-inorganic rubber taking phosphorus and nitrogen atoms as main chains, has excellent heat resistance, weather resistance, oil resistance and chemical medium resistance, and has excellent physical and mechanical properties and electrical properties, and compared with the traditional nitrile rubber, the fluorinated phosphazene rubber has incomparable advantages in the aspects of high temperature resistance and oil resistance.

Furthermore, the slow release ball comprises a plurality of layers of slow release films with consistent thickness, a plurality of contact micropores which are uniformly distributed are formed in the surfaces of the slow release films, antioxidant powder is filled among the plurality of layers of slow release films, and the antioxidant powder is slowly released based on the principle of slow release of the films, so that the concentration of the antioxidant in the transformer oil is always maintained in a normal range, and the oxidative deterioration speed of the transformer is further delayed.

Furthermore, a wireless temperature sensor is installed AT the inner end of the upper barrel body and comprises a DIP switch, a central processing unit, a temperature data acquisition module, an amplifier, an A/D converter, a wireless transmitting module, an electronic switch and a power module, the central processing unit adopts an AT89S52 chip, the wireless transmitting module adopts any one of WIFI, 433 and Zigbee, the wireless temperature sensor can monitor the temperature of the upper layer of transformer oil in the transformer body in real time, the temperature of the top layer of the transformer oil cannot exceed 90 ℃, the oil temperature of the top layer generally cannot exceed 85 ℃ frequently for preventing the insulation aging of the transformer, the wireless temperature sensor utilizes the wireless transmitting module to reduce the penetration point of the transformer oil, transmits temperature data to technical personnel in real time, and improves the safety of the transformer body during operation.

Further, just digging percolator department has the access hole on the cage lateral wall, there is the discernment door in the access hole hinge connection, install facial discernment lock on the discernment door, the camera is installed to cage the inner, provides the access passage for the technical staff through professional training, keeps the video evidence through camera record maintenance process simultaneously, realizes the person of accountability's system, conveniently finds the person of accountability of maintenance, and very big transfer technical staff's maintenance is very big, is difficult for appearing the maintenance accident.

3. Advantageous effects

Compared with the prior art, the utility model has the advantages of:

(1) the scheme can realize that the amorphous alloy replaces the traditional silicon steel sheet, the resistivity is 3-6 times of the silicon steel sheet, the load loss is reduced by 15%, the no-load loss is reduced by 70%, meanwhile, the full-oil-filled sealed corrugated oil tank shell is adopted, the permanent sealing is realized by the self elasticity adapting to the expansion of oil, an oil conservator and a respirator are replaced, the transformer oil is isolated from the outside, the entering of oxygen and moisture is effectively reduced, the reduction of the insulating property is caused, the percolation and cooling heat dissipation of the transformer oil are combined, meanwhile, the content of the antioxidant is controlled based on the slow release principle, the oxidative deterioration speed of the transformer oil is obviously reduced, the oil does not need to be changed in the normal operation period of the oil-immersed transformer, the maintenance cost of the transformer is greatly reduced, and the service life of the transformer is.

(2) Cooling body includes cooling jacket, liquid reserve tank, circulating water pump, inlet tube and outlet pipe, and the cooling jacket parcel is at cold oil pipe surface outward, and the inlet tube and liquid reserve tank intercommunication are passed through to the cooling jacket upper end, and the tip passes through outlet pipe and liquid reserve tank intercommunication under the cooling jacket, and circulating water pump installs in the liquid reserve tank, relies on circulating water pump to improve the power of coolant liquid circulation, and the coolant liquid carries out abundant cooling to cold oil pipe when the cooling jacket.

(3) The inside fixedly connected with water-proof ring of cooling jacket cuts the water distribution hole that has annular array to distribute on the water-proof ring, makes things convenient for even the water distribution hole stream from water-proof ring of coolant liquid, improves the cooling area to cold oil pipe for cooling rate.

(4) A standby pipe is communicated between the hot oil pipe and the cold oil pipe, and a second electromagnetic valve is mounted on the standby pipe and used for maintaining normal flowing and cooling of transformer oil.

(5) Go up the stack shell left end and cut into and have an inlet hole, go up the downthehole threaded connection of enterprising and have first sealing plug, first sealing washer has been cup jointed on the first sealing washer, lower stack shell left end is cut into and is had a hole down, it has the second sealing washer to leave a hole threaded connection down, the second sealing washer has been cup jointed on the second sealing washer, make things convenient for the technical staff can be through letting in dry nitrogen gas and new oil in the ooze filter to the greatest extent air in proper order after changing the seepage regeneration mechanism for this internal transformer oil of transformer is difficult to be by air pollution.

(6) The sealing gasket is arranged between the flange plates and is made of fluoroalkoxy phosphazene elastomer, the sealing performance of the upper barrel body and the infiltration ring when the flange of the lower barrel body is connected is improved due to the arrangement of the sealing gasket, the fluoroalkoxy phosphazene elastomer is fluorinated phosphazene rubber, is novel semi-inorganic rubber taking phosphorus and nitrogen atoms as main chains, has excellent heat resistance, weather resistance, oil resistance and chemical medium resistance, and has excellent physical and mechanical properties and electrical properties, and compared with the traditional nitrile rubber, the high-temperature-resistant and oil-resistant semi-inorganic rubber has incomparable advantages in the aspects of high temperature resistance and oil resistance.

(7) The slow release ball comprises a plurality of layers of slow release films with consistent thickness, a plurality of uniformly distributed contact micropores are formed in the surfaces of the slow release films, antioxidant powder is filled between the plurality of layers of slow release films, and the antioxidant powder is slowly released based on the slow release principle of the films, so that the concentration of the antioxidant in the transformer oil is always maintained in a normal range, and the oxidative deterioration speed of the transformer is further delayed.

(8) Go up the inner wireless temperature sensor of installing of stack shell, wireless temperature sensor includes the DIP switch, central processing unit, temperature data acquisition module, the amplifier, the AD converter, wireless transmitting module, electronic switch and power module, central processing unit adopts AT89S52 chip, wireless transmitting module adopts WIFI, any one in 433 or the Zigbee, wireless temperature sensor can the temperature of this internal transformer oil upper strata of real time monitoring transformer, the temperature on transformer oil top layer must not exceed 90 ℃, for preventing transformer insulation ageing, the top layer oil temperature generally should not often exceed 85 ℃, wireless temperature sensor utilizes wireless transmitting module to reduce the infiltration point of transformer oil, transmit temperature data to technical staff in real time, the security when improving the transformer body operation.

(9) Just digging percolator department on the cage lateral wall has the access hole, hinge connection has the discernment door in the access hole, installs facial discernment lock on the discernment door, and the camera is installed to cage the inner, provides the access way for the technical staff through professional training, keeps the video evidence through camera record maintenance process simultaneously, realizes the person of accountability's system, conveniently finds the maintenance person of accountability, and very big transfer technical staff's maintenance is active, is difficult for appearing the maintenance accident.

Drawings

Fig. 1 is an external view of the present invention;

fig. 2 is a cross-sectional view of the present invention;

FIG. 3 is a schematic view of the structure at A in FIG. 2;

FIG. 4 is a schematic view of the percolator part according to the present invention;

FIG. 5 is a schematic view of the structure at B in FIG. 4;

FIG. 6 is a schematic structural view of the slow release ball of the present invention;

fig. 7 is a schematic structural diagram of the flowing state of the transformer oil of the present invention;

fig. 8 is a cross-sectional view of a cooling jacket portion of the present invention.

The reference numbers in the figures illustrate:

1 transformer body, 2 radiators, 3 iron cores, 4 windings, 5 high-voltage leads, 6 low-voltage leads, 7 oil level gauges, 8 explosion-proof valves, 9 isolation hoods, 10 percolators, 1001 upper cylinder body, 1002 percolation rings, 1003 lower cylinder body, 11 hot oil pipes, 12 cold oil pipes, 13 first electromagnetic valves, 14 cooling hoods, 15 liquid storage tanks, 16 spare pipes, 17 second electromagnetic valves, 18 wireless temperature sensors, 19 flange plates, 20 first sealing plugs, 21 second sealing plugs, 22 activated alumina bed layers, 23 slow-release balls, 2301 slow-release films, 2302 antioxidant powder, 24 positioning filter screens, 25 water-proof rings and 26 sealing gaskets.

Detailed Description

The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention based on the embodiments of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are used in a broad sense, and for example, "connected," may be fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediate medium, or connected between two elements.

Example 1:

referring to fig. 1-2, a fully oil-filled sealed amorphous alloy oil-immersed transformer includes a transformer body 1, the transformer body 1 includes a corrugated oil tank shell, an iron core 3, a winding 4, a high-voltage lead 5, a low-voltage lead 6, an oil level gauge 7 and an explosion-proof valve 8, the corrugated oil tank shell adopts a corrugated sheet, which has a breathing function to compensate the volume change of oil caused by temperature change, replaces the traditional oil conservator and respirator, isolates the transformer oil from the outside, effectively reduces the decrease of insulation performance caused by the entry of oxygen and moisture, the peripheral side walls of the transformer body 1 are all fixedly connected with radiators 2, the radiators 2 and the transformer body 1 are integrally formed, the iron core 3 is made of amorphous alloy, the basic elements of amorphous alloy are iron, nickel, cobalt, silicon, boron and carbon, and are soft magnetic materials with isotropic property, the magnetic power is small, the structure defect of obstructing the movement of a domain wall does not exist, the thickness is extremely thin and is only 0.027mm, the filling coefficient is correspondingly reduced and is only 0.75-0.8, the resistivity is very high and is 3-6 times of that of the traditional silicon steel plate, the hardness is 5 times of that of a silicon steel sheet, the amorphous alloy material is particularly sensitive to stress, and four uniformly distributed isolation covers 9 are fixedly connected to the outer end of the transformer body 1.

Referring to fig. 3-5, a percolator 10 is disposed in the middle of the isolation cover 9, and is used for purifying and regenerating transformer oil filled in the transformer body 1, a hot oil pipe 11 is communicated between the upper end of the percolator 10 and the upper end of the transformer body 1, a cold oil pipe 12 is communicated between the lower end of the percolator 10 and the lower end of the transformer body 1, according to the temperature change of the transformer oil in the operation process of the transformer body 1, the transformer oil flows in the hot oil pipe 11, the percolator 10 and the cold oil pipe 12 based on thermosiphon, the hot oil pipe 11 and the cold oil pipe 12 are both provided with a first electromagnetic valve 13 for controlling the on-off of the hot oil pipe 11 and the cold oil pipe 12, the percolator 10 includes an upper barrel 1001, a percolation ring 1002 and a lower barrel 1003 which are sequentially distributed from top to bottom, and a flange 19 is disposed between the upper barrel 1001, the percolation ring 1002 and the lower barrel 1003 for connection, the percolation ring 1002 is internally provided with a percolation regeneration mechanism for reading the transformer oil for purification and regeneration, the percolation regeneration mechanism comprises a slow release ball 23 and a pair of activated alumina bed layers 22, the slow release ball 23 is clamped between the pair of activated alumina bed layers 22, the pair of activated alumina bed layers 22 are used for adsorbing and filtering free carbon, oxide and impurities mixed in the transformer oil and keeping the insulation performance of the transformer oil, the slow release ball 23 is used for keeping the concentration of an antioxidant in the transformer oil, the content of the antioxidant usually accounts for 0.3-0.5% of the total mass of the transformer, the content of the antioxidant in the transformer oil is gradually consumed along with the running time, the content of the antioxidant is gradually reduced, the function of the antioxidant is continuously weakened, when the content of the antioxidant is lower than 0.3%, the antioxidant effect cannot be achieved, one side of the activated alumina bed layer 22, which is far away from the slow release ball 23, is provided with a positioning filter screen 24, play the effect of fixed seepage mechanism on the one hand, on the other hand plays the great mechanical impurity of prefiltration size, alleviates the filtration pressure of filtration mechanism, and these mechanical impurity if direct by active alumina bed 22 filter easily cause the jam immediately, and the joint between location filter screen 24 and the infiltration ring 1002 inside wall.

Referring to fig. 6, the slow release ball 23 includes a plurality of slow release films 2301 with uniform thickness, a plurality of contact micropores are uniformly formed on the surfaces of the slow release films 2301, antioxidant powder 2302 is filled between the plurality of slow release films 2301, and the antioxidant powder 2302 is slowly released based on the principle of film slow release, so that the antioxidant concentration in the transformer oil is always maintained in a normal range, and further the oxidative deterioration speed of the transformer is delayed, the slow release films 2301 are formed by combining a polymer skeleton and a small molecule reducing agent, the antioxidant powder 2302 is 2.6 di-tert-butyl-p-methyl phenol, the slow release films 2301 realize self-dissolution depending on the sensitivity to the antioxidant concentration in the transformer oil, and further the antioxidant powder 2302 is released to maintain the antioxidant concentration in the transformer oil.

In this embodiment, the release of the antioxidant powder 2302 is based on the principle of film slow release, and the antioxidant powder 2302 filled in each layer is slowly released by dissolving the multi-layer slow release film 2301 layer by layer from outside to inside, so that the dissolution rate of the slow release film 2301 is required to be matched with the consumption rate of the antioxidant in the transformer oil, a person skilled in the art can also adopt the principle of controlled release, the slow release film 2301 is made of a material insoluble in oil and is a single layer, the inside of the film is also densely filled with the antioxidant powder 2302, except that the slow release film 2301 is drilled with a nano-scale micropore by laser, the antioxidant powder 2302 is slowly released into the transformer oil through the micropore, and the release rate of the antioxidant powder is required to be matched with the consumption rate of the antioxidant in the transformer oil 2302; or the plurality of the slow release balls 23 are made into a plurality of single consumables, namely, each slow release ball 23 is coated by a slow release film 2301 formed by combining a polymer skeleton and a small molecular reducing agent, the interior of the slow release film 2301 is filled with antioxidant powder 2302, the thickness of the slow release film 2301 of each slow release ball 23 is different, the time difference of the plurality of slow release balls 23 for releasing the antioxidant powder 2302 is formed, and the thickness difference of each slow release film 2301 is controlled to be consistent during the preparation, so that the aim of slow release is achieved.

Referring to fig. 2, a cooling mechanism is disposed on the cold oil pipe 12, the cooling mechanism includes a cooling cover 14, a liquid storage tank 15, a circulating water pump, a water inlet pipe and a water outlet pipe, the cooling cover 14 is wrapped on the outer surface of the cold oil pipe 12, the upper end of the cooling cover 14 is communicated with the liquid storage tank 15 through the water inlet pipe, the lower end of the cooling cover 14 is communicated with the liquid storage tank 15 through the water outlet pipe, the circulating water pump is installed in the liquid storage tank 15, power for circulating cooling liquid is improved by the circulating water pump, the cooling liquid fully cools the cold oil pipe 12 when passing through the cooling cover 14, referring to fig. 8, a water isolating ring 25 is fixedly connected inside the cooling cover 14, water distribution holes distributed in an annular array are formed in the water isolating ring 25, the cooling liquid can uniformly flow down from the water distribution holes in the water isolating ring 25, the cooling area of the cold.

In this embodiment, the cooling mechanism adopts a cooling liquid circulation cooling mode, and those skilled in the art can select a suitable cooling mode according to actual conditions, such as a leading-edge semiconductor cooling mode, and a plurality of semiconductor cooling plates are covered on the oil cooling pipe 12 in an enclosing manner, so that the cooling mechanism has the advantages of no need of any refrigerant, continuous operation, no pollution source, no rotating component, no rotary effect, no sliding component, no vibration, no noise, long service life, easy installation, and the semiconductor cooling plates are current transduction type plates, can realize high-precision temperature control by controlling input current, and can easily realize remote control, program control and computer control by adding temperature detection and control means, thereby facilitating the formation of an automatic control system, and the power of a single cooling element pair of the semiconductor cooling plates is very small but combined into a galvanic pile, when the same type of electric piles are combined into a refrigerating system in a series-parallel connection mode, the power can be increased, and therefore the refrigerating power can be in the range from several milliwatts to more than ten thousand watts.

Referring to fig. 3, a spare pipe 16 is connected between the hot oil pipe 11 and the cold oil pipe 12, and a second electromagnetic valve 17 is installed on the spare pipe 16 for maintaining normal flow and cooling of the transformer oil.

Please refer to fig. 4, the left end of the upper barrel 1001 is provided with an upper inlet hole, the upper inlet hole is connected with a first sealing plug 20 through a thread, the first sealing plug 20 is sleeved with a first sealing ring, the left end of the lower barrel 1003 is provided with a lower outlet hole, the lower outlet hole is connected with a second sealing plug 21 through a thread, the second sealing plug 21 is sleeved with a second sealing ring, and a technician can conveniently exhaust air in the percolator 10 through sequentially introducing dry nitrogen and new oil after replacing the leakage regeneration mechanism, so that transformer oil in the transformer body 1 is not easily polluted by air.

Referring to fig. 5, a sealing gasket 26 is sandwiched between flange plates 19, the sealing gasket 26 is made of fluorinated alkoxy phosphazene elastomer, the sealing gasket 26 improves the sealing performance when the upper barrel 1001, the percolating ring 1002 and the lower barrel 1003 are connected by flanges, the fluorinated alkoxy phosphazene elastomer is fluorinated phosphazene rubber, is a novel semi-inorganic rubber with phosphorus and nitrogen atoms as main chains, has excellent heat resistance, weather resistance, oil resistance and chemical medium resistance, and has excellent physical and mechanical properties and electrical properties, and compared with the conventional nitrile rubber, the high temperature resistance and oil resistance have incomparable advantages.

Referring to fig. 4, a wireless temperature sensor 18 is installed AT the inner end of an upper barrel 1001, the wireless temperature sensor 18 includes a DIP switch, a central processing unit, a temperature data acquisition module, an amplifier, an a/D converter, a wireless transmission module, an electronic switch and a power module, the central processing unit employs an AT89S52 chip, the wireless transmission module employs any one of WIFI, 433 and Zigbee, the wireless temperature sensor 18 can monitor the temperature of the upper layer of transformer oil in a transformer body 1 in real time, the temperature of the top layer of the transformer oil should not exceed 90 ℃, in order to prevent the transformer from being insulated and aged, the temperature of the top layer should not usually exceed 85 ℃, the wireless temperature sensor 18 reduces the penetration point of the transformer oil by using the wireless transmission module, transmits temperature data to technicians in real time, and improves the safety of the transformer body 1 during operation.

Please refer to fig. 1, the access hole is dug to percolator 10 on the lateral wall of cage 9, hinge connection has the discernment door in the access hole, install facial discernment lock on the discernment door, the camera is installed to cage 9 the inner, provide the access way for the technical staff through professional training, video evidence is preserved through camera record maintenance process simultaneously, realize the person of responsibility to the system, conveniently find the person of responsibility for maintenance, very big transfer technical staff's maintenance is vital, the maintenance accident is difficult for appearing.

When the transformer oil purifier is used, the temperature of the transformer oil is increased due to heat generated by the transformer body 1 during operation, the quality of the transformer oil with higher temperature is slightly increased, the quality of the transformer oil with lower temperature is greatly reduced, the transformer oil flows from top to bottom in the hot oil pipe 11, the percolator 10 and the cold oil pipe 12 based on the thermosiphon principle, please refer to fig. 7, after the transformer oil with higher temperature enters the percolator 10 from the hot oil pipe 11, the transformer oil is purified and regenerated by the percolation regeneration mechanism, the mechanical impurities with larger size are filtered in advance by the positioning filter screen 24, free carbon, oxides and impurities in the transformer oil are adsorbed and filtered by the active alumina bed layer 22, and when the transformer oil enters the cold oil pipe 12 after the percolation regeneration, the transformer oil in the cold oil pipe 12 is cooled by the cooling mechanism, so that the thermosiphon effect can be maintained, and the transformer oil is, the oxidation deterioration speed of the transformer oil can be delayed due to the reduction of the temperature, the antioxidant content in the transformer oil can be gradually consumed along with the running time, the antioxidant content can be gradually reduced, the function of the antioxidant content can be continuously weakened, when the antioxidant content is lower than 0.3%, the antioxidant effect cannot be achieved, at the moment, the slow release ball 23 slowly releases the antioxidant powder 2302 based on the film slow release principle to supplement the antioxidant content in the transformer oil, so that the antioxidant effect can be continuously achieved, and the service life of the transformer oil is greatly prolonged.

When the percolation regeneration mechanism needs to be replaced, a designated technician opens the identification door for maintenance after face identification, closes the first electromagnetic valve 13 on the hot oil pipe 11 and the cold oil pipe 12, opens the second electromagnetic valve 17, so that the transformer oil changes the flow path, flows into the cold oil pipe 12 from the hot oil pipe 11 through the standby pipe 16, unscrews the bolts on the flange 19 at the moment to separate the upper cylinder body 1001, the percolation ring 1002 and the lower cylinder body 1003, removes the percolation ring 1002 to replace the percolation regeneration mechanism, reinstalls the percolation ring 1002 between the upper cylinder body 1001 and the lower cylinder body 1003 after the replacement is completed, opens the first sealing plug 20 and the second sealing plug 21 after ensuring the sealing, introduces dry nitrogen into the upward inlet hole to expel the air inside, closes the second sealing plug 21 after continuously introducing the dry nitrogen for 30s, injects the same fresh oil as the original transformer oil into the upward inlet hole until the dry oil is also expelled, impurities and moisture in the air can be prevented from being mixed in the fresh oil, the first sealing plug 20 is closed to ensure that the percolator 10 is kept sealed, and then the first electromagnetic valve 13 is opened to close the second electromagnetic valve 17 to recover the normal purification state.

The utility model discloses can realize adopting amorphous alloy to replace traditional silicon steel sheet, the resistivity is 3-6 times of silicon steel sheet, load loss has descended 15%, no-load loss has descended 70%, adopt the canned type ripple oil tank casing of full oil charge simultaneously, realize permanent sealing with the inflation of self elasticity adaptation oil, oil conservator and respirator have been replaced, make transformer oil keep apart with the external world, effectively reduce oxygen, the entering of moisture leads to the decline of insulating properties, combine infiltration and cooling heat dissipation to transformer oil, control the content of antioxidant based on the slowly-releasing principle simultaneously, the oxidation deterioration speed of the reduction transformer oil that is showing, it need not change oil to have guaranteed that oil-immersed transformer need not change oil in normal operating period, greatly reduced the maintenance cost of transformer, the life of transformer has been prolonged.

The above description is only the preferred embodiment of the present invention; the scope of the present invention is not limited thereto. Any person skilled in the art should also be able to cover the technical scope of the present invention by replacing or changing the technical solution and the improvement concept of the present invention with equivalents and modifications within the technical scope of the present invention.

Claims

1. The utility model provides a full oil charge canned type metallic glass oil-immersed transformer, includes transformer body (1), transformer body (1) includes ripple oil tank casing, iron core (3), winding (4), high voltage lead wire (5), low pressure lead wire (6), oil level gaugember (7) and explosion-proof valve (8), its characterized in that: the transformer comprises a transformer body (1), radiators (2) are fixedly connected to the peripheral side walls of the transformer body (1), the radiators (2) and the transformer body (1) are integrally formed, an iron core (3) is made of amorphous alloy, four uniformly distributed isolation covers (9) are fixedly connected to the outer end of the transformer body (1), a percolator (10) is arranged in the middle of the isolation cover (9), a hot oil pipe (11) is communicated between the upper end of the percolator (10) and the upper end of the transformer body (1), a cold oil pipe (12) is communicated between the lower end of the percolator (10) and the lower end of the transformer body (1), first electromagnetic valves (13) are respectively installed on the hot oil pipe (11) and the cold oil pipe (12), and the percolator (10) comprises an upper barrel body (1001), a percolation ring (1002) and a lower barrel body (1003) which are sequentially distributed from top to bottom, go up stack shell (1001), infiltration ring (1002) and down stack shell (1003) and all be provided with ring flange (19) each other, be equipped with infiltration regeneration mechanism in infiltration ring (1002), infiltration regeneration mechanism includes slowly-releasing ball (23) and a pair of active alumina bed (22), and slowly-releasing ball (23) press from both sides and locate between a pair of active alumina bed (22), slowly-releasing ball (23) one side is kept away from in active alumina bed (22) is equipped with location filter screen (24), and fixes a position joint between filter screen (24) and infiltration ring (1002) inside wall, be provided with cooling body on cold oil pipe (12).

2. The oil-filled sealed type amorphous alloy oil-filled transformer according to claim 1, wherein: cooling body includes cooling jacket (14), liquid reserve tank (15), circulating water pump, inlet tube and outlet pipe, and cooling jacket (14) parcel is at cold oil pipe (12) surface, inlet tube and liquid reserve tank (15) intercommunication are passed through to cooling jacket (14) upper end, tip passes through outlet pipe and liquid reserve tank (15) intercommunication under cooling jacket (14), and circulating water pump installs in liquid reserve tank (15).

3. The oil-filled sealed type amorphous alloy oil-filled transformer according to claim 2, wherein: the cooling cover (14) is fixedly connected with a water-isolating ring (25) inside, and water distribution holes distributed in an annular array are formed in the water-isolating ring (25).

4. The oil-filled sealed type amorphous alloy oil-filled transformer according to claim 1, wherein: a standby pipe (16) is communicated between the hot oil pipe (11) and the cold oil pipe (12), and a second electromagnetic valve (17) is installed on the standby pipe (16).

5. The oil-filled sealed type amorphous alloy oil-filled transformer according to claim 1, wherein: go up stack shell (1001) left end and cut into and have gone up the inlet opening, go up interior threaded connection of inlet opening has first sealing plug (20), first sealing washer has been cup jointed on first sealing plug (20), stack shell (1003) left end is cut into down and is left the hole, it has second sealing plug (21) to go out threaded connection down, the second sealing washer has been cup jointed on second sealing plug (21).

6. The oil-filled sealed type amorphous alloy oil-filled transformer according to claim 1, wherein: a sealing gasket (26) is arranged between the flange plates (19) in a clamped mode, and the sealing gasket (26) is made of fluoroalkoxy phosphazene elastomer.

7. The oil-filled sealed type amorphous alloy oil-filled transformer according to claim 1, wherein: the slow-release ball (23) comprises a plurality of layers of slow-release films (2301) with consistent thickness, a plurality of uniformly distributed contact micropores are formed in the surfaces of the slow-release films (2301), and antioxidant powder (2302) is filled among the plurality of layers of the slow-release films (2301).

8. The oil-filled sealed type amorphous alloy oil-filled transformer according to claim 1, wherein: go up stack shell (1001) inner and install wireless temperature sensor (18), wireless temperature sensor (18) include DIP switch, central processing unit, temperature data acquisition module, amplifier, AD converter, wireless transmitting module, electronic switch and power module, central processing unit adopts AT89S52 chip, any one in wireless transmitting module adopts WIFI, 433 or Zigbee.

9. The oil-filled sealed type amorphous alloy oil-filled transformer according to claim 1, wherein: just to percolator (10) department division there is the access hole on cage (9) lateral wall, there is the discernment door in the access hole hinge connection, install facial discernment lock on the discernment door, the camera is installed to cage (9) the inner.