CN108648904B - Equipment and process for manufacturing transformer by using APG technology - Google Patents
Equipment and process for manufacturing transformer by using APG technology Download PDFInfo
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- CN108648904B CN108648904B CN201810641283.6A CN201810641283A CN108648904B CN 108648904 B CN108648904 B CN 108648904B CN 201810641283 A CN201810641283 A CN 201810641283A CN 108648904 B CN108648904 B CN 108648904B
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- 238000005516 engineering process Methods 0.000 title claims abstract description 28
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 151
- 239000000463 material Substances 0.000 claims abstract description 83
- 238000003860 storage Methods 0.000 claims abstract description 42
- 239000003822 epoxy resin Substances 0.000 claims abstract description 39
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 39
- 239000000203 mixture Substances 0.000 claims abstract description 28
- 238000007789 sealing Methods 0.000 claims description 68
- 238000002347 injection Methods 0.000 claims description 34
- 239000007924 injection Substances 0.000 claims description 34
- 238000005192 partition Methods 0.000 claims description 14
- 238000003825 pressing Methods 0.000 claims description 9
- 238000007711 solidification Methods 0.000 claims description 6
- 230000008023 solidification Effects 0.000 claims description 6
- 239000013589 supplement Substances 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 abstract description 6
- 238000001816 cooling Methods 0.000 abstract description 3
- 239000000047 product Substances 0.000 description 6
- 238000005266 casting Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/005—Impregnating or encapsulating
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses equipment for manufacturing a transformer by using an APG technology and a process thereof, wherein the equipment for manufacturing the transformer by using the APG technology comprises an electronic scale, a storage tank, a feeder, a heater, a cooler, a mould, a plurality of control valves and a preheating pipeline; the electronic scale is connected with the storage tank, the storage tank is connected with the material injector through a heating pipeline, and the material injector is connected with the die; the material injector is provided with a liquid inlet pipe and a liquid outlet pipe, the heater is respectively connected with the liquid inlet pipe and the liquid outlet pipe, and the cooler is respectively connected with the liquid inlet pipe and the liquid outlet pipe; the invention discloses a material injector of equipment for manufacturing a transformer by using an APG technology, which has a heating function and a cooling function, changes a method that an epoxy resin mixture is heated only by a high-temperature die, also avoids the epoxy resin mixture from being solidified in a pipeline, and improves the insulating property of a product.
Description
Technical Field
The invention relates to the field of manufacturing of electrical elements, in particular to equipment and a process for manufacturing a transformer by using an APG technology.
Background
The epoxy resin fully-sealed insulating structure belongs to an integral insulating structure, and is an important process technology for ensuring that a transformer and a high-voltage device work normally and reliably in a complex environment. Compared with other insulating treatment processes, the method has the characteristics of no solvent pollution, excellent comprehensive performance of the cured product, no air gap of the insulating layer, good thermal conductivity, good arc resistance, simple and convenient maintenance and the like, and has good technical and economic comprehensive benefits. In the late eighties of the twentieth century, the electrician industry of China introduced the whole set of equipment, formula and matched chemical materials of APG technology from abroad, so that the quality of the whole insulating structure of the epoxy resin of China is greatly improved by one step.
However, the application of the conventional APG technology is mainly limited to the production of insulating parts of electrical appliances, and many problems are still to be solved when the APG technology is used for manufacturing dry transformers and mutual inductors, and as the primary coil, the secondary coil, the iron core and the like of the transformers and the mutual inductors are all sealed in epoxy resin, the APG technology has higher insulating and performance requirements, and although a few domestic manufacturers have been in the attack for years, the APG technology can produce products which really meet all technical conditions. When large products such as a transformer are cast by using APG, the APG is easy to solidify at high temperature, so that the material at the center of the mold cavity is solidified slowly, the outer part and the pouring gate are solidified, the inner part is solidified slowly, the epoxy resin is subjected to volume shrinkage during solidification, and the supplementary material cannot be pressed into the mold again because of the solidified pouring gate, so that a cavity is easily generated in the inner part because of shrinkage, the part is always exactly the main insulation area of the primary coil and the secondary coil of the transformer, the insulation strength is reduced, and the partial discharge characteristic is poor. The mixture is required to be heated up quickly before entering the mould during pouring, but according to the characteristics of the epoxy resin, the epoxy resin can be cured quickly at high temperature, so that the epoxy resin can not be cured in a pipeline while keeping high material temperature, and the problem is solved.
Disclosure of Invention
The invention aims to: in order to overcome the defects in the prior art, the invention provides equipment for manufacturing a transformer by using an APG technology, which can be used for continuous casting of the transformer and a dry-type transformer and production of qualified products.
The technical scheme is as follows: in order to achieve the above purpose, the equipment for manufacturing the transformer by using the APG technology comprises an electronic scale, a storage tank, a feeder, a heater, a cooler, a die, a plurality of control valves and a preheating pipeline; the electronic scale is connected with the storage tank, the storage tank is connected with the material injector through the preheating pipeline, and the material injector is connected with the die; the material injection device is provided with a liquid inlet pipe and a liquid outlet pipe, the heater is provided with a first inlet and a first outlet, the cooler is provided with a second inlet and a second outlet, the first inlet and the second inlet are respectively connected with the liquid inlet pipe, and the first outlet and the second outlet are respectively connected with the liquid outlet pipe; the control valves are respectively connected between the liquid inlet pipe and the first inlet, between the liquid inlet pipe and the second inlet, between the liquid outlet pipe and the first outlet and between the liquid outlet pipe and the second outlet; the mold is provided with a vacuum port.
Further, the storage tank comprises a storage tank body, a pressure control valve and an air compressor; the storage tank body is connected with the material injector; the pneumatic press is connected with the storage tank body through a pressure control valve.
Further, the material injector comprises a cylinder, a sealing device, a material injector body, a push rod and a material injection port flange; the cylinder, the sealing cylinder, the material injector body and the material injection port flange are sequentially connected from top to bottom; the pushing rod is coaxially sleeved in the material injection device body and the sealing cylinder, one end of the pushing rod is connected with a piston of the air cylinder, and the other end of the pushing rod extends to the material injection port flange; the inner wall of the material injector body and the outer wall of the push rod form a material injection cavity, a feed inlet is arranged outside the material injector body, the feed inlet is connected with the material storage tank body, and the feed inlet is communicated with the material injection cavity; the material injection port flange is provided with a material outlet, the material outlet is connected with the die, and the material outlet is communicated with the material injection cavity; the piston of the air cylinder moves to the upper end to form a first limit position, the push rod is separated from the material injection port flange, the piston of the air cylinder moves to the lower end to form a second limit position, and the push rod is in jacking connection with the material injection port flange; the sealing device is coaxially sleeved outside the push rod and inside the sealing cylinder and is arranged between the feeding hole and the air cylinder; the sealing device is connected with the sealing cylinder and is in sliding connection with the push rod.
Further, a first sealing ring is arranged along the discharge hole of the material injection port flange, and the upper surfaces of the material injection port flange and the first sealing ring are arc surfaces; one end of the push rod is provided with a sealing ball head; the cylinder is in a first limit position, the sealing ball head is separated from the first sealing ring, and when the cylinder is in a second limit position, the sealing ball head is in pressing connection with the first sealing ring.
Further, the injector body comprises an injector inner wall pipe and an injector outer wall pipe; the inner wall pipe of the material injector is coaxially sleeved in the outer wall pipe of the material injector; the inner surface of the outer wall pipe of the injector and the outer surface of the inner wall pipe of the injector form a first heat exchange cavity; the push rod comprises a push rod inner wall pipe and a push rod outer wall pipe, and the push rod inner wall pipe is coaxially sleeved in the push rod outer wall pipe; the inner surface of the push rod outer wall pipe and the outer surface of the push rod inner wall pipe form a second heat exchange cavity; a liquid outlet cavity is formed in the inner wall pipe of the push rod; the second heat exchange cavity is communicated with the liquid outlet cavity; the outer wall pipe of the material injector is connected with a liquid inlet pipe and an internal circulation liquid outlet pipe, and the liquid inlet pipe and the internal circulation liquid outlet pipe are respectively communicated with the first heat exchange cavity; the outer wall pipe of the push rod is connected with an inner circulation liquid inlet pipe which is communicated with the second heat exchange cavity; the internal circulation liquid outlet pipe is connected with the internal circulation liquid inlet pipe through a hose; the push rod inner wall pipe is connected with the drain pipe, and the drain pipe is communicated with the liquid outlet cavity.
Further, the first heat exchange chamber comprises a first partition plate and a second partition plate; the first partition plate and the second partition plate are respectively connected with the outer wall pipe of the material injector and the inner wall pipe of the material injector; the first partition plate and the second partition plate divide the first heat exchange cavity into a left half cavity and a right half cavity, and the left half cavity is communicated with the bottom end of the right half cavity; the liquid inlet pipe and the internal circulation liquid outlet pipe are arranged on the same horizontal plane and are connected to the upper part of the first heat exchange cavity; the liquid inlet pipe is connected with the right half cavity, and the internal circulation liquid outlet pipe is connected with the left half cavity; the liquid inlet pipe is connected with the first inlet and the second inlet respectively.
Further, the lower end of the push rod inner wall pipe is provided with a plurality of liquid outlet holes; the second heat exchange cavity is communicated with the liquid outlet cavity through the liquid outlet hole.
Further, the inner circulation liquid inlet pipe and the liquid outlet pipe are arranged at the upper part of the sealing device, and the liquid outlet pipe is coaxially sleeved in the inner circulation liquid inlet pipe; one end of the liquid outlet pipe is connected with the inner wall pipe of the push rod, and the other end of the liquid outlet pipe extends out of the inner circulation liquid outlet pipe and is connected with the first outlet and the second outlet respectively.
Further, a plurality of bulges are formed on one side of the inner wall pipe of the material injector towards the material injection cavity; the bulges are arrayed along the circumferential direction and extend from the inner wall pipe of the injector to the outer wall pipe of the push rod; the projections divide the material injection cavity into a plurality of material injection sub-cavities.
After the epoxy resin mixture is injected into a storage tank, a pneumatic press is started, gas is input into the storage tank, and the epoxy resin mixture is pressed into a feeder after being preheated by a preheating pipeline of the storage tank; after the epoxy resin mixture is injected into the material injector, starting a heater, enabling heated liquid in the heater to sequentially flow through a right half cavity of the first heat exchange cavity, enabling the heated liquid to sequentially flow into a left half cavity of the first heat exchange cavity, enabling the heated liquid to sequentially enter a second heat exchange cavity through an internal circulation liquid outlet pipe, a hose and an internal circulation liquid inlet pipe, and enabling the heated liquid to finally enter the heater again through the liquid outlet pipe through the liquid outlet cavity, so that the heated liquid is circulated; the epoxy resin is filled into the mould after being heated by the liquid in the first heat exchange cavity and the second heat exchange cavity; the amount of epoxy resin injected into the mold is precisely controlled by an electronic scale; the pressure of the gas injected into the storage tank is controlled by a pressure control valve;
when the quantity of the injected epoxy resin mixture reaches a set value, the heater is closed, the cooler is started, the cooled liquid sequentially flows through the right half cavity of the first heat exchange cavity, the left half cavity of the first heat exchange cavity sequentially enters the second heat exchange cavity through the internal circulation liquid outlet pipe, the hose and the internal circulation liquid inlet pipe, and finally enters the cooler again through the liquid outlet pipe through the liquid outlet cavity, and the circulation is performed;
after the epoxy resin mixture is filled in the mould, adding gas with fixed pressure into the storage tank, and pressing part of the epoxy resin mixture into the mould by the material injector to supplement solidification shrinkage;
the bubbles generated in the pouring process are discharged out of the die through the vacuumizing port of the die.
The beneficial effects are that: the beneficial effects of the invention are as follows: (1) The equipment for manufacturing the transformer by using the APG technology is internally provided with the feeder which has the functions of heating and cooling the epoxy resin mixture, and the heating function is started before the epoxy resin mixture injected into the mould is reached, so that the method of heating the epoxy resin mixture by using a high-temperature mould in the existing technology is changed, and the curing speed difference of the epoxy resin mixture at the center and the edge part of the mould due to the temperature difference is reduced; after the epoxy resin mixture injected into the mold reaches a set value, the heating function is closed to start the cooling function, so that the epoxy resin mixture is prevented from being solidified in the pipeline and the material injector; (2) The process for manufacturing the transformer by using the APG technology changes the prior method for only reinforcing the constant air pressure during the APG pouring, and the method is influenced by the factors of raw material parameters, climate, temperature, mold runner design and the like in the pouring process, so that the casting speed can be greatly changed by only reinforcing the constant air pressure, the speed is too high, the residual air in a mold cavity is not discharged, the residual air remains in a product and the like, and the insulation strength can be unqualified; the speed is too slow, which is easy to cause the solidification of the gate and the cavity inside caused by the shortage of materials. The air pressure is automatically regulated by flow measurement, so that the casting speed is kept within a set range. After the casting is finished, fixed air pressure is added to forcedly supplement solidification shrinkage. (3) The equipment for manufacturing the transformer by using the APG technology is provided with a vacuumizing port on the die, so that small bubbles are required to be reduced as much as possible when the transformer is poured, the bubbles generated in the pouring process can be effectively solved by vacuumizing, and the product quality is improved.
Drawings
FIG. 1 is a schematic diagram of the present invention;
FIG. 2 is a cross-sectional view of the structure of the injector according to the present invention;
FIG. 3 is a view in the direction C of FIG. 2;
FIG. 4 is an enlarged view of the structure of portion A of FIG. 2;
FIG. 5 is an enlarged view of the structure of portion B of FIG. 2;
FIG. 6 is a sectional view D-D of FIG. 2;
FIG. 7 is an E-view of FIG. 2;
fig. 8 is an enlarged view of the structure of the F portion in fig. 4.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
An apparatus for manufacturing a transformer using APG technology and a process thereof as described in fig. 1 to 7, comprising a sub-scale 1, a storage tank 2, a filler 3, a heater 4, a cooler 5, a mold 6, a plurality of control valves 7 and a preheating pipe 8; the electronic scale 1 is connected with the storage tank 2, the storage tank 2 is connected with the material injector 3 through the preheating pipeline 8, and the material injector 3 is connected with the die 6; the injector 3 is provided with a liquid inlet pipe 301 and a liquid outlet pipe 302, the heater 4 is provided with a first inlet 401 and a first outlet 402, the cooler 5 is provided with a second inlet 501 and a second outlet 502, the first inlet 401 and the second inlet 501 are respectively connected with the liquid inlet pipe 301, and the first outlet 402 and the second outlet 502 are respectively connected with the liquid outlet pipe 302; the control valves 7 are respectively connected between the liquid inlet pipe 301 and the first inlet 401, between the liquid inlet pipe 301 and the second inlet 501, between the liquid outlet pipe 302 and the first outlet 402, and between the liquid outlet pipe 302 and the second outlet 502. The control valves 7 are used for controlling the opening and closing between the heater 4 and the injector 3 and between the cooler 5 and the injector 3; the die 6 is provided with a vacuum port 601, and the vacuum port 601 is connected with a vacuum pump through a vacuum valve.
The storage tank 2 comprises a storage tank body 201, a pressure control valve 202 and an air compressor 203; the storage tank body 201 is connected with the material injector 3 through a preheating pipeline 8; the air compressor 203 is connected with the storage tank body 201 through the pressure control valve 202.
The injector 3 comprises a cylinder 303, a sealing cylinder 328, a sealing device 304, an injector body 305, a push rod 306 and an injector port flange 307; the cylinder 303, the sealing cylinder 328, the injector body 305 and the injector flange 307 are sequentially connected from top to bottom; the push rod 306 is coaxially sleeved inside the injector body 305 and the sealing cylinder 328, one end of the push rod is connected with the piston of the cylinder 303, and the other end extends to the injector flange 307; the inner wall of the injector body 305 and the outer wall of the push rod 306 form an injector cavity 308, a feed inlet 309 is arranged outside the sealing cylinder 328, the feed inlet 309 is connected with the storage tank body 201 through a preheating pipeline 8, the feed inlet 309 is communicated with the injector cavity 308, and the feed inlet 309 is arranged below the sealing device 304; the material injection port flange 307 is provided with a material outlet 310, the material outlet 310 is connected with the die 6, and the material outlet 310 is communicated with the material injection cavity 308; the piston of the cylinder 303 moves to the upper end to form a first limit position, the push rod 306 is separated from the material injection port flange 307, the piston of the cylinder 303 moves to the lower end to form a second limit position, and the push rod 306 is in pressing connection with the material injection port flange 307; the sealing device 304 is coaxially sleeved outside the push rod 306 and inside the sealing cylinder 328, and is arranged between the feeding hole 309 and the air cylinder 303; the seal 304 is coupled to the seal cartridge 328 and slidably coupled to the push rod 306.
Wherein the sealing device 304 comprises a sealing seat 3041, a second sealing ring 3042, a sealing sleeve 3043, a sealing lock nut 3044, a third sealing ring 3045 and a wear-resistant sleeve 3046; the sealing seat 3041 is fixedly connected with the sealing cylinder 328; the sealing seat 3041 is provided with a circular truncated cone-shaped hole, the sealing sleeve 3043 is circular truncated cone-shaped, and the sealing sleeve 3043 is coaxially sleeved in the circular truncated cone-shaped hole of the sealing seat 3041; the second seal ring 3042 is disposed between the seal seat 3041 and the seal sleeve 3043; the sealing lock nut 3044 is in threaded connection with the sealing cylinder 328 and is in pressing connection with the sealing sleeve 3043; the wear-resistant sleeve 3046 is coaxially sleeved between the push rod outer wall pipe 316 and the sealing seat 3041, and is slidably connected with the push rod outer wall pipe 316; the third seal ring 3045 is connected with the seal sleeve 3043 and the wear-resistant sleeve 3046 respectively.
The material injection port flange 307 is provided with a first sealing ring 311 along the material outlet 310, and one end of the push rod 306 is provided with a sealing ball 327; in order to increase the contact area between the sealing ball head 327 and the first sealing ring 311, the upper surfaces of the material injection port flange 307 and the first sealing ring 311 are arc surfaces; the cylinder 303 is at a first limit position, the sealing ball 327 is separated from the first sealing ring 311, and when the cylinder 303 is at a second limit position, the sealing ball 327 is in pressing connection with the first sealing ring 311.
The injector body 305 includes an injector inner wall tube 312 and an injector outer wall tube 313; the inner wall pipe 312 of the injector is coaxially sleeved in the outer wall pipe 313 of the injector; the inner surface of the injector outer wall tube 313 and the outer surface of the injector inner wall tube 312 form a first heat exchange chamber 314; the push rod 306 comprises a push rod inner wall pipe 315 and a push rod outer wall pipe 316, wherein the push rod inner wall pipe 315 is coaxially sleeved in the push rod outer wall pipe 316; the inner surface of the outer pushrod wall tube 316 and the outer surface of the inner pushrod wall tube 315 form a second heat exchange chamber 317; a liquid outlet cavity 318 is arranged in the push rod inner wall tube 315; the second heat exchange chamber 317 is communicated with the liquid outlet chamber 318; the outer wall pipe 313 of the injector is connected with a liquid inlet pipe 301 and an internal circulation liquid outlet pipe 319, and the liquid inlet pipe 301 and the internal circulation liquid outlet pipe 319 are respectively communicated with the first heat exchange cavity 314; the outer wall pipe 316 of the push rod is connected with an inner circulation liquid inlet pipe 320, and the inner circulation liquid inlet pipe 320 is communicated with a second heat exchange cavity 317; the inner circulation liquid outlet pipe 319 is connected with the inner circulation liquid inlet pipe 320 through a hose; the push rod inner wall tube 315 is connected with the liquid outlet tube 302, and the liquid outlet tube 302 is communicated with the liquid outlet cavity 318.
According to fig. 6, the injector 3 comprises an injector outer wall pipe 316, a first heat exchange chamber 314, an injector inner wall pipe 315, an injector chamber 308, a push rod outer wall pipe 316, a second heat exchange chamber 317, a push rod inner wall pipe 315 and a liquid outlet chamber 318 from outside to inside.
In order to avoid the separation of the injector inner wall tube 312 from the injector outer wall tube, a first partition 321 and a second partition 322 are provided in the first heat exchange chamber 314; the first partition 321 and the second partition 322 are respectively connected with the injector outer wall pipe 313 and the injector inner wall pipe 312; the first partition 321 and the second partition 322 divide the first heat exchange chamber 314 into a left half chamber 323 and a right half chamber 324, and the left half chamber 323 communicates with the bottom end of the right half chamber 324; the liquid inlet pipe 301 and the internal circulation liquid outlet pipe 319 are arranged on the same horizontal plane and are connected to the upper part of the first heat exchange cavity 314; the liquid inlet pipe 301 is connected with the right half cavity 324, and the internal circulation liquid outlet pipe 319 is connected with the left half cavity 323; the liquid inlet pipe 301 is connected to the first inlet 401 and the second inlet 501, respectively.
A plurality of liquid outlet holes 325 are arranged at the lower end of the push rod inner wall tube 315; the second heat exchange chamber 317 communicates with the outlet chamber 318 through an outlet aperture 325.
The inner circulation liquid inlet pipe 320 and the liquid outlet pipe 302 are arranged at the upper part of the sealing device 304, and the liquid outlet pipe 302 is coaxially sleeved in the inner circulation liquid inlet pipe 320; one end of the liquid outlet pipe 302 is connected with the push rod inner wall pipe 315, and the other end extends out of the internal circulation liquid outlet pipe 320 and is respectively connected with the first outlet 402 and the second outlet 502.
The outer surface of the sealing cylinder 328 is provided with a kidney-shaped hole, and the inner circulation liquid inlet pipe 320 and the liquid outlet pipe 302 extend out of the sealing cylinder 328 from the kidney-shaped hole 328.
In order to increase the heat conducting area of the material injecting cavity 308, a plurality of protrusions 326 are formed on the inner wall tube 312 of the material injector toward the material injecting cavity 308; a plurality of said protrusions 326 are circumferentially arrayed and extend from the injector inner wall tube 312 to the push rod outer wall tube 316; the protrusions 326 divide the shot cavity 308 into shot subchambers.
A process for manufacturing a transformer by using an APG technology comprises the following steps: after the epoxy resin mixture is injected into the storage tank 2, the air compressor 203 is started, air is input into the storage tank 2, and the epoxy resin mixture is preheated by the storage tank 2 through the preheating pipeline 8 and then is pressed into the injector 3; after the epoxy resin mixture is injected into the injector 3, the heater 4 is started, the warmed liquid in the heater 4 sequentially flows through the right half cavity 324 of the first heat exchange cavity, the left half cavity 323 of the first heat exchange cavity, then sequentially enters the second heat exchange cavity 317 through the internal circulation liquid outlet pipe 319, the hose and the internal circulation liquid inlet pipe 320, finally enters the heater 4 again through the liquid outlet pipe 302 through the liquid outlet cavity 318, and the circulation is performed; the epoxy resin is heated by the liquid placed in the first heat exchange chamber 314 and the second heat exchange chamber 317 and then injected into the mold; the amount of epoxy resin injected into the mold is precisely controlled by the electronic scale 1; the pressure of the gas injected into the storage tank 2 is controlled 202 by a pressure control valve;
when the amount of the injected epoxy resin mixture reaches a set value, the heater 4 is turned off, the cooler 5 is started, the cooled liquid sequentially flows through the right half cavity 324 of the first heat exchange cavity, the left half cavity 323 of the first heat exchange cavity, then sequentially enters the second heat exchange cavity 317 through the internal circulation liquid outlet pipe 319, the hose and the internal circulation liquid inlet pipe 320, finally enters the cooler 5 again through the liquid outlet cavity 318 through the liquid outlet pipe 302, and the like is circulated;
after the epoxy resin mixture is filled in the mould, adding gas with fixed pressure into the storage tank 2, and pressing part of the epoxy resin mixture into the mould 6 by the injector 3 to supplement solidification shrinkage;
the bubbles generated in the pouring process are discharged out of the die through the vacuumizing port of the die.
The foregoing is only a preferred embodiment of the invention, it being noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the invention.
Claims (8)
1. An apparatus for manufacturing a transformer using APG technology, characterized in that: comprises an electronic scale (1), a storage tank (2), a material injector (3), a heater (4), a cooler (5), a die (6), a plurality of control valves (7) and a preheating pipeline (8); the electronic scale (1) is connected with the storage tank (2), the storage tank (2) is connected with the material injector (3) through the preheating pipeline (8), and the material injector (3) is connected with the die (6); the liquid injection device is characterized in that the liquid injection device (3) is provided with a liquid inlet pipe (301) and a liquid outlet pipe (302), the heater (4) is provided with a first inlet (401) and a first outlet (402), the cooler (5) is provided with a second inlet (501) and a second outlet (502), the first inlet (401) and the second inlet (501) are respectively connected with the liquid inlet pipe (301), and the first outlet (402) and the second outlet (502) are respectively connected with the liquid outlet pipe (302); the control valves (7) are respectively connected between the liquid inlet pipe (301) and the first inlet (401), between the liquid inlet pipe (301) and the second inlet (501), between the liquid outlet pipe (302) and the first outlet (402) and between the liquid outlet pipe (302) and the second outlet (502); the die (6) is provided with a vacuum port (601);
the storage tank (2) comprises a storage tank body (201), a pressure control valve (202) and an air compressor (203); the storage tank body (201) is connected with the material injector (3) through a preheating pipeline (8); the air compressor (203) is connected with the storage tank body (201) through a pressure control valve (202);
the injector (3) comprises a cylinder (303), a sealing cylinder (328), a sealing device (304), an injector body (305), a push rod (306) and an injector flange (307); the cylinder (303), the sealing cylinder (328), the injector body (305) and the injector flange (307) are sequentially connected from top to bottom; the push rod (306) is coaxially sleeved inside the injector body (305) and the sealing cylinder (328), one end of the push rod is connected with a piston of the air cylinder (303), and the other end of the push rod extends to the injector flange (307); the inner wall of the material injector body (305) and the outer wall of the push rod (306) form a material injection cavity (308), a feed inlet (309) is arranged outside the sealing cylinder (328), the feed inlet (309) is connected with the material storage tank body (201) through a preheating pipeline (8), and the feed inlet (309) is communicated with the material injection cavity (308); the material injection port flange (307) is provided with a material outlet (310), the material outlet (310) is connected with the die (6), and the material outlet (310) is communicated with the material injection cavity (308); the piston of the air cylinder (303) moves to the upper end to form a first limit position, the push rod (306) is separated from the material injection port flange (307), the piston of the air cylinder (303) moves to the lower end to form a second limit position, and the push rod (306) is in jacking connection with the material injection port flange (307); the sealing device (304) is coaxially sleeved outside the push rod (306) and inside the sealing cylinder (328), and is arranged between the feeding hole (309) and the air cylinder (303); the sealing device (304) is connected with the sealing cylinder (328) and is connected with the push rod (306) in a sliding way.
2. An apparatus for manufacturing a transformer using APG technology as claimed in claim 1, wherein: the material injection port flange (307) is provided with a first sealing ring (311) along the discharge port (310), and the upper surfaces of the material injection port flange (307) and the first sealing ring (311) are arc surfaces; one end of the push rod (306) is provided with a sealing ball head (327); the cylinder (303) is positioned at a first limit position, the sealing ball head (327) is separated from the first sealing ring (311), and when the cylinder (303) is positioned at a second limit position, the sealing ball head (327) is in pressing connection with the first sealing ring (311).
3. An apparatus for manufacturing a transformer using APG technology as claimed in claim 1, wherein: the injector body (305) comprises an injector inner wall tube (312) and an injector outer wall tube (313); the inner wall pipe (312) of the injector is coaxially sleeved in the outer wall pipe (313) of the injector; the inner surface of the injector outer wall tube (313) and the outer surface of the injector inner wall tube (312) form a first heat exchange cavity (314); the push rod (306) comprises a push rod inner wall pipe (315) and a push rod outer wall pipe (316), and the push rod inner wall pipe (315) is coaxially sleeved in the push rod outer wall pipe (316); the inner surface of the push rod outer wall tube (316) and the outer surface of the push rod inner wall tube (315) form a second heat exchange cavity (317); a liquid outlet cavity (318) is formed in the push rod inner wall pipe (315); the second heat exchange cavity (317) is communicated with the liquid outlet cavity (318); the outer wall pipe (313) of the material injector is connected with a liquid inlet pipe (301) and an internal circulation liquid outlet pipe (319), and the liquid inlet pipe (301) and the internal circulation liquid outlet pipe (319) are respectively communicated with the first heat exchange cavity (314); the push rod outer wall pipe (316) is connected with an inner circulation liquid inlet pipe (320), and the inner circulation liquid inlet pipe (320) is communicated with the second heat exchange cavity (317); the internal circulation liquid outlet pipe (319) is connected with the internal circulation liquid inlet pipe (320) through a hose; the push rod inner wall pipe (315) is connected with the liquid outlet pipe (302), and the liquid outlet pipe (302) is communicated with the liquid outlet cavity (318).
4. An apparatus for manufacturing a transformer using APG technology according to claim 3, wherein: the first heat exchange chamber (314) comprises a first baffle (321) and a second baffle (322); the first clapboard (321) and the second clapboard (322) are respectively connected with the outer wall pipe (313) of the injector and the inner wall pipe (312) of the injector; the first partition plate (321) and the second partition plate (322) divide the first heat exchange cavity (314) into a left half cavity (323) and a right half cavity (324), and the left half cavity (323) is communicated with the bottom end of the right half cavity (324); the liquid inlet pipe (301) and the internal circulation liquid outlet pipe (319) are arranged on the same horizontal plane and are connected to the upper part of the first heat exchange cavity (314); the liquid inlet pipe (301) is connected with the right half cavity (324), and the internal circulation liquid outlet pipe (319) is connected with the left half cavity (323); the liquid inlet pipe (301) is connected with the first inlet (401) and the second inlet (501) respectively.
5. An apparatus for manufacturing a transformer using APG technology according to claim 3, wherein: the lower end of the push rod inner wall pipe (315) is provided with a plurality of liquid outlet holes (325); the second heat exchange cavity (317) is communicated with the liquid outlet cavity (318) through a liquid outlet hole (325).
6. An apparatus for manufacturing a transformer using APG technology according to claim 3, wherein: the inner circulation liquid inlet pipe (320) and the liquid outlet pipe (302) are arranged at the upper part of the sealing device (304), and the liquid outlet pipe (302) is coaxially sleeved in the inner circulation liquid inlet pipe (320); one end of the liquid outlet pipe (302) is connected with the push rod inner wall pipe (315), and the other end of the liquid outlet pipe extends out of the internal circulation liquid outlet pipe (320) and is respectively connected with the first outlet (402) and the second outlet (502).
7. An apparatus for manufacturing a transformer using APG technology according to claim 3, wherein: a plurality of bulges (326) are formed on one side of the inner wall pipe (312) of the material injecting device towards the material injecting cavity (308); a plurality of the protrusions (326) are arranged along the circumferential direction and extend from the injector inner wall pipe (312) to the push rod outer wall pipe (316); the protrusions (326) divide the injection cavity (308) into a plurality of injection sub-cavities.
8. A process for manufacturing a transformer using the apparatus for manufacturing a transformer using APG technology as claimed in claim 4, comprising: after injecting the epoxy resin mixture into the storage tank (2), starting an air compressor (203), inputting air into the storage tank (2), preheating the epoxy resin mixture from the storage tank (2) through a preheating pipeline (8), and pressing the mixture into the material injector (3); after the epoxy resin mixture is injected into the injector (3), starting the heater (4), enabling the warmed liquid in the heater (4) to sequentially flow through the right half cavity (324) of the first heat exchange cavity, enabling the left half cavity (323) of the first heat exchange cavity to sequentially enter the second heat exchange cavity (317) through the internal circulation liquid outlet pipe (319), the hose and the internal circulation liquid inlet pipe (320), and finally enabling the warmed liquid to enter the heater (4) again through the liquid outlet pipe (302) through the liquid outlet cavity (318), and circulating in this way; the epoxy resin is filled into the mould after being heated by the liquid in the first heat exchange cavity (314) and the second heat exchange cavity (317); the amount of the epoxy resin injected into the mold is precisely controlled by an electronic scale (1); the pressure of the gas injected into the storage tank (2) is controlled by a pressure control valve (202);
when the amount of the injected epoxy resin mixture reaches a set value, the heater (4) is turned off, the cooler (5) is started, the cooled liquid sequentially flows through the right half cavity (324) of the first heat exchange cavity, the left half cavity (323) of the first heat exchange cavity, then sequentially enters the second heat exchange cavity (317) through the internal circulation liquid outlet pipe (319), the hose and the internal circulation liquid inlet pipe (320), finally enters the cooler (5) again through the liquid outlet pipe (302) through the liquid outlet cavity (318), and the circulation is performed;
after the epoxy resin mixture is filled in the mould, adding gas with fixed pressure into the storage tank (2), and pressing part of the epoxy resin mixture into the mould (6) by the material injector (3) to supplement solidification shrinkage;
the bubbles generated in the pouring process are discharged out of the mould through a vacuumizing port (601) of the mould (6).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810641283.6A CN108648904B (en) | 2018-06-21 | 2018-06-21 | Equipment and process for manufacturing transformer by using APG technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810641283.6A CN108648904B (en) | 2018-06-21 | 2018-06-21 | Equipment and process for manufacturing transformer by using APG technology |
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| CN108648904B true CN108648904B (en) | 2023-12-15 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111319184A (en) * | 2020-03-10 | 2020-06-23 | 浙江省开化七一电力器材有限责任公司 | APG apparatus for producing |
| CN112092283B (en) * | 2020-08-27 | 2022-07-05 | 浙江省开化七一电力器材有限责任公司 | A kind of APG production method and device for casing |
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| CN103144232A (en) * | 2013-03-06 | 2013-06-12 | 林小平 | Epoxy resin pressure gel forming machine |
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| CN207097656U (en) * | 2017-07-12 | 2018-03-13 | 湖北新天成电气有限公司 | A transformer intelligent pouring system |
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2018
- 2018-06-21 CN CN201810641283.6A patent/CN108648904B/en active Active
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|---|---|---|---|---|
| CN103144232A (en) * | 2013-03-06 | 2013-06-12 | 林小平 | Epoxy resin pressure gel forming machine |
| CN203637066U (en) * | 2013-12-20 | 2014-06-11 | 厦门盈硕科机械制造有限公司 | Material-injection control device in pressure forming |
| CN103991200A (en) * | 2014-04-29 | 2014-08-20 | 成都龙泉鑫锐模具塑料厂 | Heat energy recovery type injection mould rapid in temperature adjusting |
| CN104319088A (en) * | 2014-10-11 | 2015-01-28 | 天津市滨海纽泰克电气有限公司 | Preparation process of vacuum epoxy resin casting type mutual inductor |
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| CN108648904A (en) | 2018-10-12 |
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Denomination of invention: A device and process for manufacturing transformers using APG technology Granted publication date: 20231215 Pledgee: Agricultural Bank of China Limited by Share Ltd. Wuxi science and Technology Branch Pledgor: WUXI ZHONGDIAN TRANSFORMER PRODUCTION Co.,Ltd. Registration number: Y2024980031062 |
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