阅读说明：本技术 一种变压器自动干燥生产线 (Automatic drying production line for transformer ) 是由 张燕雄 胡湘娥 罗镇江 黄桂朝 吴银红 易明双 于 2021-07-06 设计创作，主要内容包括：本发明公开了一种变压器自动干燥生产线,其技术方案的要点是包括有干燥罐,在所述干燥罐的端部设有罐门、驱动罐门升降的升降装置,在干燥罐内设有用于加热干燥罐内腔的导热油管,在干燥罐的上方设有钢架,在钢架上分别设有对导热油管循环输送导热油的加热机组、对干燥罐抽真空的真空机组、对抽出的水蒸气进行冷却的冷凝器、废气废液处理装置、换气风机,在干燥罐的内部分别设有循环风机、输送线。本发明真空罐内设置两层两列共四通道布置,可同时对二十台变压器干燥,每个工位可独立驱动控制。产品采用单独工位定位,与罐外工AGV配合可将产品输送到指定工位,可对不同规格的产品混合装载同时处理。(The invention discloses an automatic drying production line of a transformer, which is characterized by comprising a drying tank, wherein a tank door and a lifting device for driving the tank door to lift are arranged at the end part of the drying tank, a heat conduction oil pipe for heating an inner cavity of the drying tank is arranged in the drying tank, a steel frame is arranged above the drying tank, a heating unit for circularly conveying heat conduction oil to the heat conduction oil pipe, a vacuum unit for vacuumizing the drying tank, a condenser for cooling extracted steam, a waste gas and waste liquid treatment device and a ventilation fan are respectively arranged on the steel frame, and a circulating fan and a conveying line are respectively arranged in the drying tank. The vacuum tank is internally provided with two layers of two rows of four channels, twenty transformers can be dried simultaneously, and each station can be independently driven and controlled. The product adopts independent station location, can carry the product to appointed station with the cooperation of external worker AGV, can mix the loading simultaneous processing to the product of different specifications.)

1. The utility model provides a transformer automatic drying production line which characterized in that: the drying device comprises a drying tank (1), wherein a tank door (101) and a lifting device (3) for driving the tank door (101) to lift are arranged at the end part of the drying tank (1), a heat conduction oil pipe (2) for heating the inner cavity of the drying tank (1) is arranged in the drying tank (1), a steel frame (10) is arranged above the drying tank (1), a heating unit (4) for circularly conveying heat conduction oil to the heat conduction oil pipe (2), a vacuum unit (5) for vacuumizing the drying tank (1), a condenser (8) for cooling pumped steam, an exhaust gas waste liquid treatment device (6), a broken hollow port (102) for ventilating the drying tank (1) after vacuumizing, an air outlet (103), an electrode connecting rod (109), a ventilation fan (9) for blowing air to the drying tank (1) to replace the internal steam from the air outlet (103) are respectively arranged in the drying tank (1), and a circulating fan, a circulating fan and a driving fan are respectively arranged in the drying tank (1), A conveying line (7) for conveying the transformer.

2. The automatic drying production line of transformers according to claim 1, characterized in that: the lifting device (3) comprises a support (301), a guide chute (302) and a hydraulic cylinder (303) are respectively arranged on the side wall of the support (301), a movable pulley (304) capable of sliding along the guide chute (302) is arranged at the end part of an output rod of the hydraulic cylinder (303), at least two fixed pulleys (305) are arranged at the top of the support (301), a first steel wire rope (306) is sequentially wound on the movable pulley (304) and the fixed pulleys (305), the tail end of the first steel wire rope (306) is hung on the tank door (101) through the last fixed pulley (305), and the head end of the first steel wire rope (306) is fixed on the support (301).

3. The automatic drying production line of transformers according to claim 2, characterized in that: the top of the support (301) is further provided with a falling protector (12), and the falling protector (12) is used for hanging the tank door (101) through a second steel wire rope (13).

4. The automatic drying production line of transformers according to any one of claims 1 to 3, characterized in that: the two ends of the drying tank (1) are provided with the tank door (101).

5. The automatic drying production line of transformers according to claim 1, characterized in that: the heat-conducting oil pipes (2) are provided with six groups which are respectively arranged on the left lower wall, the left upper wall, the right lower wall, the right upper wall, the middle part and the top part in the drying tank (1), the six groups of heat-conducting oil pipes (2) are connected with the heating unit (4) in parallel, an oil inlet (104) and an oil outlet (105) which are connected with the heating unit (4) are respectively arranged on the drying tank (1), an oil discharge port (106) is also arranged at the oil outlet (105), the heating unit (4) comprises a heater (401), an oil transfer pump (402) connected with the heater (401) and an expansion tank (403), an oil outlet pipe (404) connected with the oil outlet (105) is arranged on the heater (401), the oil delivery pump (402) is provided with an oil delivery pipe (405) connected with the oil inlet (104), the expansion tank (403) is connected to the oil transfer pump (402) via a pipeline.

6. The automatic drying production line of transformers according to claim 1, characterized in that: the vacuum unit (5) comprises two roots pumps (501) connected in series, one roots pump (501) is connected with the condenser (8), a cooling water pipeline (801) leading to an external water source is arranged on the condenser (8), the condenser (8) is connected with two rotary vane pumps (502) in parallel, a vacuum pipe (503) is arranged on the other roots pump (501), a vacuum port (107) is arranged on the drying tank (1), and the vacuum pipe (503) is connected with the vacuum port (107).

7. The automatic drying production line of transformers according to claim 6, characterized in that: waste gas waste liquid treatment device (6) include waste gas treatment jar (601), establish waste liquid collection tank (602) in waste gas treatment jar (601) below, be equipped with activated carbon in waste gas treatment jar (601) be connected with waste liquid output pump (603) on waste liquid collection tank (602), be connected with waste gas pipe (604) on waste gas treatment jar (601), the other end and two of waste gas pipe (604) vane pump (502) are parallelly connected, are connected with fluid-discharge tube (605) in waste liquid collection tank (602), the other end of fluid-discharge tube (605) divide into two branch respectively with vane pump (502) condenser (8) connect.

8. The automatic drying production line of transformers according to claim 1, characterized in that: two cylinders (15) are arranged at the top of the drying tank (1), the ventilation fan (9) is connected with the two cylinders (15) through an air inlet pipe (14), and the circulating fan is arranged in the cylinders (15).

9. The automatic drying production line of transformers according to claim 1, characterized in that: the conveying line (7) comprises a motor (701), a speed reducer (702) and a roller (703), wherein the speed reducer (702) and the roller (703) are connected with an output shaft of the motor (701), the speed reducer (702) and the motor (701) are arranged outside the drying tank (1), a speed reducer port (704) connected with the speed reducer (702) is arranged on the drying tank (1), a chain for driving the roller (703) to rotate is connected to the speed reducer port (704), and the roller (703) is arranged inside the drying tank (1).

10. The automatic drying production line of transformers according to claim 9, characterized in that: the four conveying lines (7) are divided into an upper layer and a lower layer, each layer is provided with a left conveying line and a right conveying line, each conveying line (7) comprises five stations, the roller (703) of each station is driven by the independent motor (701), the middle of the drying tank (1) is provided with the middle support (108), one end of the roller (703) is arranged on the inner wall of the drying tank (1), and the other end of the roller (703) is arranged on the middle support (108).

[ technical field ] A method for producing a semiconductor device

The invention relates to an automatic drying production line for transformers.

[ background of the invention ]

In the drying process of the transformer, people always want to accelerate the drying speed and shorten the drying time, and meanwhile, a satisfactory drying effect is also obtained. The current common transformer drying device is divided into: a variable pressure vacuum drying device, a hot air circulation drying device, a drying oven, a gas phase drying device and the like.

At present, the drying devices have some defects, which can cause that the air in the drying box body contains a large amount of saturated steam, and the steam is easy to condense on the surface of a steel part to cause surface corrosion; because the transformer insulating material is usually wrapped layer by layer, the surface moisture can only be rapidly heated and removed during drying, and most heat can also be taken away by evaporation of the surface moisture, so that the internal insulating material cannot reach enough temperature and cannot be thoroughly dried.

[ summary of the invention ]

The invention aims to overcome the defects of the prior art and provide an automatic drying production line for a transformer, which can automatically remove saturated water vapor and effectively remove moisture in the transformer.

The invention is realized by the following technical scheme:

the utility model provides a transformer automatic drying production line which characterized in that: including drying chamber 1 the tip of drying chamber 1 is equipped with jar door 101, the elevating gear 3 that drive jar door 101 goes up and down, be equipped with the heat conduction oil pipe 2 that is used for heating drying chamber 1 inner chamber in drying chamber 1, be equipped with steelframe 10 in drying chamber 1's top, be equipped with respectively on steelframe 10 and carry the heating unit 4 of conduction oil to heat conduction oil pipe 2 circulation, to the vacuum unit 5 of drying chamber 1 evacuation, carry out refrigerated condenser 8 to the vapor of taking out, waste gas waste liquid treatment device 6, the breach 102 of ventilating air to drying chamber 1 after the evacuation, air outlet 103, electrode connects pole 109, the ventilation fan 9 of taking the air out is replaced from air outlet 103 to the vapor of drying chamber 1 blast air in order to follow inside, be equipped with circulating fan respectively in drying chamber 1's inside, the transfer chain 7 that is used for carrying the transformer.

The automatic drying production line of the transformer is characterized in that: the lifting device 3 comprises a bracket 301, a guide chute 302 and a hydraulic cylinder 303 are respectively arranged on the side wall of the bracket 301, a movable pulley 304 capable of sliding along the guide chute 302 is arranged at the end part of an output rod of the hydraulic cylinder 303, at least two fixed pulleys 305 are arranged at the top part of the bracket 301, a first steel wire rope 306 is sequentially wound on the movable pulley 304 and the fixed pulleys 305, the tail end of the first steel wire rope 306 is hung on the tank door 101 through the last fixed pulley 305, and the head end of the first steel wire rope 306 is fixed on the bracket 301.

The automatic drying production line of the transformer is characterized in that: and a safety hook 12 is further arranged at the top of the support 301, and the safety hook 12 is used for hanging the tank door 101 through a second steel wire rope 13.

The automatic drying production line of the transformer is characterized in that: the tank door 101 is arranged at both ends of the drying tank 1.

The automatic drying production line of the transformer is characterized in that: the drying device is characterized in that the heat conduction oil pipe 2 is provided with six groups, the six groups are respectively arranged on a left lower wall, a left upper wall, a right lower wall, a right upper wall, a middle part and a top part in the drying tank 1, the six groups of heat conduction oil pipes 2 are connected with the heating unit 4 in parallel, the drying tank 1 is respectively provided with an oil inlet 104 and an oil outlet 105 which are connected with the heating unit 4, an oil discharge port 106 is further arranged at the oil outlet 105, the heating unit 4 comprises a heater 401, an oil transfer pump 402 and an expansion tank 403 which are connected with the heater 401, the heater 401 is provided with an oil outlet pipe 404 which is connected with the oil outlet 105, the oil transfer pump 402 is provided with an oil transfer pipe 405 which is connected with the oil inlet 104, and the expansion tank 403 is connected with the oil transfer pump 402 through a pipeline.

The automatic drying production line of the transformer is characterized in that: the vacuum unit 5 comprises two roots pumps 501 connected in series, wherein one roots pump 501 is connected with the condenser 8, a cooling water pipeline 801 leading to an external water source is arranged on the condenser 8, the condenser 8 is connected with two rotary vane pumps 502 in parallel, a vacuum pipe 503 is arranged on the other roots pump 501, a vacuum port 107 is arranged on the drying tank 1, and the vacuum pipe 503 is connected with the vacuum port 107.

The automatic drying production line of the transformer is characterized in that: waste gas waste liquid treatment device 6 includes waste gas treatment tank 601, establishes waste liquid collection tank 602 in waste gas treatment tank 601 below, is equipped with active carbon in waste gas treatment tank 601 be connected with waste liquid output pump 603 on waste liquid collection tank 602, is connected with exhaust pipe 604 on waste gas treatment tank 601, the other end and two of exhaust pipe 604 vane pump 502 is parallelly connected, is connected with fluid-discharge tube 605 at waste liquid collection tank 602, the other end of fluid-discharge tube 605 divide into two branch respectively with vane pump 502 condenser 8 connect.

The automatic drying production line of the transformer is characterized in that: two cylinders 15 are arranged at the top of the drying tank 1, the ventilation fan 9 is connected with the two cylinders 15 through an air inlet pipe 14, and the circulating fan is arranged in the cylinders 15.

The automatic drying production line of the transformer is characterized in that: the conveying line 7 comprises a motor 701, a speed reducer 702 and a roller 703, the speed reducer 702 and the motor 701 are connected with an output shaft of the motor 701, the speed reducer 702 and the motor 701 are arranged outside the drying tank 1, a speed reducer port 704 connected with the speed reducer 702 is arranged on the drying tank 1, a chain for driving the roller 703 to rotate is connected to the speed reducer port 704, and the roller 703 is arranged inside the drying tank 1.

The automatic drying production line of the transformer is characterized in that: the four conveying lines 7 are divided into an upper layer and a lower layer, each layer is provided with a left layer and a right layer, each conveying line 7 comprises five stations, the roller 703 of each station is driven by the independent motor 701, the middle part of the drying tank 1 is provided with the middle support 108, one end of the roller 703 is arranged on the inner wall of the drying tank 1, and the other end of the roller 703 is arranged on the middle support 108.

Compared with the prior art, the invention has the following advantages:

1. the vacuum tank is internally provided with two layers of two rows of four channels, twenty transformers can be dried simultaneously, and each station can be independently driven and controlled. The product adopts independent station location, can carry the product to appointed station with the cooperation of external worker AGV, can mix the loading simultaneous processing to the product of different specifications.

2. Because the automatic conveying line is arranged in the tank, the automatic mode is adopted from the tank inlet to the tank outlet of the product, the mode of manually installing the platinum resistor for temperature measurement in the past is not feasible, and in order to solve the temperature control problem during the drying of the transformer, the equipment adopts the mode of wirelessly measuring the platinum resistor with high temperature resistance and vacuum resistance for temperature measurement, the wireless temperature measurement adopts the industrial frequency band of 868.4MHz, the interference is greatly reduced, the temperature measurement stability of the system is improved, the integral structure is exquisite, and the installation is convenient.

3. The vacuum tank door is opened in a hydraulic lifting mode, the tank door is lifted by using a steel wire rope through the driving of the hydraulic cylinder, and the guide chutes and the guide wheels are arranged on the two sides of the tank door, so that the tank door is lifted stably, the shaking is reduced, the tank door and a sealing surface can be closed well, and the evacuation fault is reduced.

4. The vacuum unit, the heating unit, the compressed air system and the cooling circulating water system are integrally arranged on the two-layer steel frame at the top of the equipment, so that the floor area of the equipment is reduced to the maximum extent, and the whole equipment is attractive and tidy.

5. The control system can carry out information communication with the SCADA master control system, and shares the main control parameters, alarm information, production control, equipment energy consumption and other information of the equipment with the master control system, and the master control system can know the running state of the equipment in real time to realize the centralized management of the equipment.

[ description of the drawings ]

FIG. 1 is a perspective view of an automatic drying line for transformers according to the present invention, which comprises two sets of drying cans;

FIG. 2 is a perspective view of an automatic drying line for transformers according to the present invention, which includes two drying cans;

FIG. 3 is a perspective view of the vacuum assembly of the present invention;

FIG. 4 is a perspective view of the heating assembly of the present invention;

FIG. 5 is an assembly view of the canister door and elevator assembly of the present invention;

FIG. 6 is a perspective view of the waste gas/liquid treatment apparatus of the present invention;

FIG. 7 is a perspective view of a dryer can of the present invention;

FIG. 8 is a side view of the dryer can 1 of the present invention, showing the conveyor line;

FIG. 9 is a top plan view of the transfer line of the present invention;

FIG. 10 is a plan view of the single layer conveyor line of the present invention;

FIG. 11 is a side view 2 of the dryer can of the present invention;

fig. 12 is a perspective view of the ventilation fan of the present invention.

In the figure: 1 is a drying tank; 101 is a tank door; 102 is a broken hole; 103 is an air outlet; 104 is an oil inlet; 105 is an oil outlet; 106 is an oil drain port; 107 is a vacuum port; 109 is an electrode connecting rod; 2 is a heat-conducting oil pipe; 201 is a left lower calandria; 202 is a left upper calandria; 203 is a right lower calandria; 204 is an upper right row pipe; 205 is a middle calandria; 206 is a top row pipe; 3 is a lifting device; 301 is a bracket; 302 is a guide chute; 303 is a hydraulic cylinder; 304 is a movable pulley; 305 is a fixed pulley; 306 is a first wire rope; 4 is a heating unit; 401 is a heater; 402 is an oil transfer pump; 403 is an expansion tank; 404 is an oil outlet pipe; 405 is an oil delivery pipe; 5 is a vacuum unit; 501 is a roots pump; 502 is a rotary vane pump; 503 is a vacuum tube; 6 is a waste gas and liquid treatment device; 601 is an exhaust gas treatment tank; 602 is a waste liquid collection tank; 603 is a waste liquid output pump; 604 is an exhaust pipe; 605 is a drain pipe; 7 is a conveying line; 701 is a motor; 702 is a speed reducer; 703 is a roller; 704 is the reducer port; 8 is a condenser; 801 is a cooling water pipeline; 9 is a ventilation fan; 10 is a steel frame; 11 is a supporting plate; 12 is a falling protector; 13 is a second steel wire rope; 14 is an air inlet pipe; 15 is a cylinder; 16 is an inflation valve; 17 is a control device; and 18 is a hydraulic station.

[ detailed description ] embodiments

The technical features of the present invention will be described in further detail with reference to the accompanying drawings so that those skilled in the art can understand the technical features.

As shown in fig. 1 to 12, an automatic drying production line for transformers comprises a drying tank 1, a tank door 101 and a lifting device 3 for driving the tank door 101 to lift are arranged at the end part of the drying tank 1, a heat-conducting oil pipe 2 for heating the inner cavity of the drying tank 1 is arranged in the drying tank 1, a steel frame 10 is arranged above the drying tank 1, a heating unit 4 for circularly conveying heat conduction oil to a heat conduction oil pipe 2, a vacuum unit 5 for vacuumizing the drying tank 1, a condenser 8 for cooling the pumped water vapor, a waste gas and waste liquid treatment device 6, a vacuum break port 102 for ventilating the drying tank 1 after vacuumizing, an air outlet 103, an electrode connecting rod 109, and a ventilation fan 9 for blowing air to the drying tank 1 to replace the water vapor inside from the air outlet 103 are respectively arranged on the steel frame 10, a circulating fan and a conveying line 7 for conveying the transformer are respectively arranged in the drying tank 1.

The electrode connecting rod 109 is used for supplying electric wires to the drying tank 1 and is sealed by epoxy resin pouring.

The automatic drying production line for the transformer comprises a conveying line 7, wherein the conveying line 7 comprises a motor 701, a speed reducer 702 and a roller 703, the speed reducer 702 and the motor 701 are connected with an output shaft of the motor 701, the speed reducer 702 and the motor 701 are arranged outside the drying tank 1, a speed reducer port 704 connected with the speed reducer 702 is arranged on the drying tank 1, a chain for driving the roller 703 to rotate is connected to the speed reducer port 704, the roller 703 is arranged inside the drying tank 1, and the speed reducer port 704 is sealed and insulated by epoxy resin in a pouring mode, as shown in fig. 9 to 11.

Furthermore, the conveyor lines 7 are provided with four layers, each layer is divided into an upper layer and a lower layer, each layer is provided with a left layer and a right layer, each conveyor line 7 comprises five stations, one drying tank 1 is provided with twenty stations, the roller 703 of each station is driven by the independent motor 701, the middle part of the drying tank 1 is provided with the middle support 108, one end of the roller 703 is arranged on the inner wall of the drying tank 1, the other end of the roller 703 is arranged on the middle support 108, the supporting plate 11 is arranged on the roller 703, and the transformer is arranged on the supporting plate 11.

Two layers of two rows and four channels are arranged in the drying tank 1, twenty transformers can be dried simultaneously, and each station can be independently driven and controlled. The transformer adopts independent station location, and the AGV dolly outside jar can carry the transformer to appointed station with the cooperation of transfer chain 7 in jar, can handle simultaneously to the product mix-load of different specifications.

Because the jar is automatic transfer chain in, from the income jar of product to the whole automatic mode that adopts of jar of play, the mode of the artifical temperature measurement platinum resistance of installing that adopts in the past is no longer feasible, because the space of drying can 1 has not got into down the workman and has placed the thermometer, for the temperature control problem when solving the transformer and drying. The equipment adopts a high-temperature-resistant and vacuum-resistant mode for measuring the temperature by a wireless platinum resistor, and before the transformer is conveyed into the drying tank 1, the wireless thermometer is placed on the transformer and is conveyed to a designated station along with the transformer through the conveying line 7. The wireless temperature measurement adopts 868.4 MHz's industrial frequency channel significantly reduced the interference and improved system temperature measurement stability, and overall structure is exquisite, simple to operate.

All be equipped with jar door 101 at the both ends of drying cabinet 1, elevating gear 3 drive jar door 101 is in order to open jar door 10, and heating unit 4 heats and the circulation is carried the oil in to heat conduction oil pipe 2, gives the jar body as medium transfer heat through oil rather than the air, can provide heat transfer efficiency greatly, shortens drying time, practices thrift the cost.

As shown in fig. 5, the lifting device 3 includes a bracket 301, a guide chute 302 and a hydraulic cylinder 303 are respectively provided on a side wall of the bracket 301, a movable pulley 304 capable of sliding along the guide chute 302 is provided at an end portion of an output rod of the hydraulic cylinder 303, at least two fixed pulleys 305 are provided on a top portion of the bracket 301, a first wire rope 306 is sequentially wound around the movable pulley 304 and the fixed pulleys 305, a tail end of the first wire rope 306 is hung to the tank door 101 via a last fixed pulley 305, a head end of the first wire rope 306 is fixed to the bracket 301, and the hydraulic cylinder 302 is powered by the hydraulic station 18.

The vacuum tank door adopts the mode of hydraulic pressure promotion to open, utilizes wire rope promotion jar door through the pneumatic cylinder drive, and jar door both sides are equipped with direction spout and guide pulley, make jar door 101 go up and down steadily, reduce to rock and make jar door 101 and sealed face can well be closed, reduce to find time the trouble.

Furthermore, a falling protector 12 is arranged at the top of the bracket 301, and the falling protector 12 is used for hanging the tank door 101 through a second steel wire rope 13. The safety catcher 12 is similar to an automobile safety belt in principle, and can pull the tank door 101 to avoid accidents when the tank door 101 suddenly drops.

As shown in fig. 8, the heat conduction oil pipe 2 is provided with six groups, which are respectively arranged on a left lower wall, a left upper wall, a right lower wall, a right upper wall, a middle part and a top part in the drying tank 1, and respectively are a left lower discharge pipe 201, a left upper discharge pipe 202, a right lower discharge pipe 203, a right upper discharge pipe 204, a middle discharge pipe 205 and a top discharge pipe 206, the six groups of heat conduction oil pipes 2 are connected in parallel with the heating unit 4, the drying tank 1 is respectively provided with an oil inlet 104 and an oil outlet 105 connected with the heating unit 4, the oil outlet 105 is further provided with an oil discharge port 106, the oil inlet 104, the oil outlet 105 and the oil discharge port 106 are correspondingly provided with six groups, and oil in the heat conduction oil pipe 2 is discharged or replaced through the oil discharge port 106.

As shown in fig. 4, the heating unit 4 includes a heater 401, an oil delivery pump 402 connected to the heater 401, and an expansion tank 403, the heater 401 is provided with an oil outlet pipe 404 connected to the oil outlet 105, the oil outlet pipe 404 is divided into six branches and is respectively connected to the six oil outlets 105, the oil delivery pump 402 is provided with an oil delivery pipe 405 connected to the oil inlet 104, the oil delivery pipe 405 is also divided into six branches and is respectively connected to the six oil inlets 104, oil heated by the heater 401 is delivered into the drying tank 1 through the oil inlet 104, is delivered through the oil outlet 105, is heated again by the heater 401 and is delivered into the drying tank 1 again, and is recycled for heating air inside the drying tank 1. When the inside of drying can 1 is heated, the transformer located inside drying can 1 is heated due to the heat transfer effect of the air, and the moisture in the transformer enters the air in drying can 1. Therefore, the moisture in the transformer can be greatly reduced.

The expansion tank 403 is connected to the oil transfer pump 402 through a pipe, the expansion tank 403 is disposed above the heater 401, since the heat transfer oil expands when heated, the heated heat transfer oil partially expands into the expansion tank 403, and if there is no expansion tank 403, the heat transfer pipe 2 may be burst. A float type liquid level meter is arranged outside the expansion tank 403, an alarm is given when the liquid level of the expansion tank 403 is too low or too high, the reason that the liquid level is too low may be that heat conducting oil leaks, and the reason that the liquid level meter is too high may be that the temperature is too high.

As shown in fig. 3, the vacuum unit 5 includes two roots pumps 501 connected in series, one of the roots pumps 501 is connected to the condenser 8, the condenser 8 is provided with a cooling water line 801 leading to an external water source, the cooling water line 801 is also divided into a water inlet line and a water outlet line, the condenser 8 is connected in parallel with two vane pumps 502, the other roots pump 501 is provided with a vacuum pipe 503, the drying tank 1 is provided with a vacuum port 107, and the vacuum pipe 503 is connected to the vacuum port 107 to vacuumize the drying tank 1. The air drawn by the vacuum assembly 5 contains small amounts of water vapor and oil that could damage the vane pump 502 if not cooled and otherwise removed. When the vacuum unit 5 is opened, the drying tank 1 can be vacuumized, and the vacuum degree in the drying tank 1 is greatly reduced, so that water molecules are more easily evaporated into the air due to the reduction of the air pressure.

As shown in fig. 6, the waste gas/liquid treatment apparatus 6 includes a waste gas treatment tank 601, and a waste liquid collection tank 602 disposed below the waste gas treatment tank 601, wherein activated carbon is contained in the waste gas treatment tank 601, waste gas is filtered by the activated carbon, a waste liquid output pump 603 is connected to the waste liquid collection tank 602, a waste gas pipe 604 is connected to the waste gas treatment tank 601, the other end of the waste gas pipe 604 is connected in parallel to the two vane pumps 502, a liquid discharge pipe 605 is connected to the waste liquid collection tank 602, the other end of the liquid discharge pipe 605 is divided into two branches and is connected to the vane pumps 502 and the condenser 8, the liquid discharge pipe 605 is further connected to the waste gas pipe 604, and the waste gas pipe 604 is disposed above the liquid discharge pipe 605.

The pipe diameter of the waste gas pipe 604 is larger than that of the liquid discharge pipe 605, the extracted air is discharged to the waste gas treatment tank 601 through the waste gas pipe 604 and then discharged, part of the air in the waste gas pipe 604 can be condensed into water, the water or oil liquid falls into the waste liquid collection tank 602 through the liquid discharge pipe 605 connected with the waste gas pipe 604, the water or oil liquid cooled in the condenser 8 falls into the waste liquid collection tank 602 through the liquid discharge pipe 605, and the water or oil liquid collected in the waste liquid collection tank 602 is discharged through the waste liquid output pump 603 when the amount of the water or oil liquid is excessive.

According to the automatic drying production line for the transformer, the two cylinders 15 are arranged at the top of the drying tank 1, the ventilating fan 9 is connected with the two cylinders 15 through the air inlet pipe 14, the circulating fan is arranged in the cylinders 15, and the ventilating fan 9 blows air to the circulating fan in the cylinders 15 through the air inlet pipe 14.

The ventilating fan 9 and the air outlet 103 may be used for replacement between the air in the drying tub 1 and the outside air. The ventilation fan 9 is provided at the top of the drying tub 1. The ventilation fan 9 can selectively communicate with the inside of the drying tub 1 to blow air to the inside of the drying tub 1. The air outlet 103 is also arranged on the drying tank 1, the air outlet 103 can be opened and closed, when the air outlet 103 is opened, the inside of the drying tank 1 is communicated with the outside through the air outlet 103, and the air in the drying tank 1 can enter the outside from the air outlet 103.

The circulating fan is preferably arranged in the cylinder 15 of the drying tank 1, and the circulating fan can enable the air in the drying tank 1 to circularly move in the drying tank 1, so that the air with higher temperature in the drying tank 1 and the air with lower temperature are continuously mixed, and the temperature distribution in the whole drying tank 1 is more uniform. The heat of the transformer can be taken away when the moisture in the transformer evaporates, so that the temperature of the transformer is reduced, and the temperature of the transformer can be reduced without being obvious under the circulating action of the circulating fan, thereby being beneficial to the rapid evaporation of the moisture in the transformer.

When the ventilation fan 9 and the air outlet 103 are opened simultaneously, the outside air enters the inside of the drying tank 1 through the ventilation fan 9, and the air originally in the drying tank 1 reaches the outside of the drying tank 1 through the air outlet 103, and because the original air in the drying tank 1 contains more moisture and is basically in a state of water vapor saturation, after the air is replaced by the ventilation fan 9 and the air outlet 103, the fresh air reentering the drying tank 1 is in a state of water vapor unsaturation because of less moisture, and the moisture remaining in the transformer can escape more easily.

The break port 102 is provided outside the drying tank 1 and can communicate with the inside of the drying tank 1. An inflation valve 16 is connected to the rupture 102, and the rupture 102 can be opened or closed by the inflation valve 16. After the opening 102 is opened, the inside of the drying cylinder 1 can be communicated with the outside. The diameter of the air outlet 103 is larger than the diameter of the air break 102, so that when the air in the drying container 1 is replaced with the outside air, the air flow rate flowing out of the air outlet 103 is large, and when the air break 102 is opened, the air flow rate entering the drying container 1 from the air break 102 is small. This allows the outside air to slowly enter the inside of the drying tub 1. Two of the vents 102 are provided, and the other vent 102 is connected with a filter for filtering air entering the vents 102.

The top of drying cylinder 1 is equipped with two drums 15, ventilation fan 9 passes through air-supply line 14 and two drum 15 is connected, circulation fan establishes in drum 15, and ventilation fan 9 realizes selectively communicating through a top valve with drum 15, and this ventilation fan 9's air intake connection has a filter, filters and dries the air that gets into in ventilation fan 9, guarantees the drying and the cleanness of air. When the ventilation fan 9 blows air, the top end valve is in an open state, air firstly enters the ventilation fan 9 through the filter, and then enters the top of the cylinder 15 through the ventilation fan 9 to cool the circulating fan. Because the circulating fan is located inside the cylinder 15, most of the air delivered by the ventilating fan 9 contacts with the surface of the circulating fan, and a better cooling effect is achieved.

The valves in the invention are all pneumatic valves, the pressure is adjusted to be proper by a compressed air system, and an air source is from the outside.

The drying line for transformer in this embodiment may further include a control device 17, where the control device 17 is capable of controlling the drying tank 1 to switch between the first operating state, the second operating state, the third operating state and the fourth operating state in sequence.

When the drying tank 1 is in the first working state, the ventilation fan 9, the air outlet 103, the vacuum unit 5 and the air break 102 are in the closed state, and the circulation fan is in the open state. At this time, the air inside the drying can 1 is heated, and moisture in the transformer is evaporated into the air.

The drying tank 1 enters a second working state after being in the first working state for a first designated time, in this state, the vacuum unit 2 and the air break port 102 are in a closed state, the ventilation fan 9 and the air outlet 103 are switched to be in an open state so as to enable air in the drying tank 1 to be replaced with outside air, and the circulating fan can be in a closed state or in an open state. That is to say, when drying cylinder 1 is in the first operating condition, at first heat the transformer in drying cylinder 1 for first appointed duration, produce saturated vapor in drying cylinder 1 this moment, then drying cylinder 1 is in the second state, carry out air replacement after opening ventilation fan 9 and air outlet 103, and some moisture in drying cylinder 1 is along with the air discharge to the external world. The first designated time period may be determined according to factors such as the size of the transformer, and the larger the transformer is, the correspondingly longer the first designated time period is, and in general, the first designated time period may be 1-2 hours.

After the drying tank 1 is in the second working state for a period of time, the saturated water vapor in the drying tank 1 is discharged into the external atmosphere, and at this time, the controller 7 can make the drying tank 1 be in a third working state, in which the vacuum unit 5 is in an open state, and the ventilation fan 9, the air outlet 103 and the air break port 102 are in a closed state. The vacuum unit 5 reduces the atmospheric pressure in the drying tank 1 to a specified atmospheric pressure value, heats the temperature in the drying tank 1 to a specified temperature, and then the drying tank 1 maintains the pressure for a second specified time, wherein the specified atmospheric pressure value when the drying tank 1 is in the third working state each time is sequentially reduced, and the specified temperature value can be sequentially increased, for example, when the drying tank 1 is in the third working state each time, the specified atmospheric pressure value is sequentially reduced by 10%, and the specified temperature value is sequentially increased by 30 °. The second designated time period when the drying tank 1 is maintained is also determined accordingly according to the size of the transformer, and may be 1-2 hours. The wireless thermometer reads the temperature in the drying tank 1 and transmits the temperature measurement value to the control device 17. The pressure in the drying cylinder 1 can be measured with a vacuum measuring instrument. Whenever the drying tank 1 is in the third operating state, the air pressure in the drying tank 1 is significantly reduced due to the vacuum pumping action of the vacuum unit 5, and at this time, moisture inside the insulating material of the transformer is more easily diffused into the air in the drying tank 1. Under the effect of the circulating fan, the transformer can better receive heat transferred by air under the condition of low voltage, and the drying efficiency is improved.

When the drying tank 1 is in the fourth operating state, the air break port 102 is in an open state, and the ventilation fan 9, the air outlet 103 and the vacuum unit 2 are in a closed state. At this time, the outside air enters the drying tub 1, and the air pressure in the drying tub 1 is gradually returned to the normal pressure.

Through the control of the control device 17, the drying tank 1 is switched among the first working state, the second working state, the third working state and the fourth working state, so that the moisture in the transformer in the drying tank 1 can be gradually diffused into the air in the drying box 1 and is discharged to the outside of the drying tank 1 through the air outlet 103 or the vacuum unit 5. The control device 17 preferably causes the drying tub 1 to be cyclically switched in sequence between a first operating state, a second operating state, a third operating state and a fourth operating state. The number of times the control device 17 controls the drying tub 1 to switch between the different states may preferably be 5 times. Because the drying cylinder 1 can realize the cascaded rising temperature and the cascaded step-down of drying cylinder 1 when being in the second operating condition at every turn for the heat of transformer is inside from outside to progressively infiltration, has realized the surface of transformer and inside synchronous rising temperature inside, can avoid because inside moisture moving speed can not catch up with surface moisture evaporation rate, causes local crack, the carbomorphism phenomenon on transformer surface, prevents that the transformer surface from forming the insulating layer.

The embodiment of the present invention is described only for the preferred embodiment of the present invention, and not for the purpose of limiting the spirit and scope of the invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the design concept of the present invention shall fall within the protection scope of the present invention.