CN111599611A - Capacitor production equipment and process - Google Patents
Capacitor production equipment and process Download PDFInfo
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- CN111599611A CN111599611A CN202010374150.4A CN202010374150A CN111599611A CN 111599611 A CN111599611 A CN 111599611A CN 202010374150 A CN202010374150 A CN 202010374150A CN 111599611 A CN111599611 A CN 111599611A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G13/00—Apparatus specially adapted for manufacturing capacitors; Processes specially adapted for manufacturing capacitors not provided for in groups H01G4/00 - H01G11/00
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G13/00—Apparatus specially adapted for manufacturing capacitors; Processes specially adapted for manufacturing capacitors not provided for in groups H01G4/00 - H01G11/00
- H01G13/003—Apparatus or processes for encapsulating capacitors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G13/00—Apparatus specially adapted for manufacturing capacitors; Processes specially adapted for manufacturing capacitors not provided for in groups H01G4/00 - H01G11/00
- H01G13/006—Apparatus or processes for applying terminals
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G13/00—Apparatus specially adapted for manufacturing capacitors; Processes specially adapted for manufacturing capacitors not provided for in groups H01G4/00 - H01G11/00
- H01G13/02—Machines for winding capacitors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G13/00—Apparatus specially adapted for manufacturing capacitors; Processes specially adapted for manufacturing capacitors not provided for in groups H01G4/00 - H01G11/00
- H01G13/04—Drying; Impregnating
Abstract
The invention discloses capacitor production equipment and a process, which are applied to the field of capacitor production and solve the technical problems that air in an impregnant conveying pipeline is not removed when a capacitor is impregnated at present, and dye liquor generates bubbles in the process of conveying the impregnant to influence the quality of the produced capacitor; the method has the technical effects of ensuring the vacuum state in the capacitor and ensuring the quality of the produced capacitor.
Description
Technical Field
The invention relates to the technical field of capacitor production, in particular to capacitor production equipment and a capacitor production process.
Background
With the rapid development of the electronic industry, the demand of the capacitor is more and more, and the requirement of the quality of the capacitor is higher and more. Vacuum drying impregnation is the most important and critical process in the production process of the capacitor, and the impregnation process needs to be carried out by vacuumizing the capacitor and then injecting an impregnant through an impregnation port of the capacitor. If the capacitor contains air or steam in the impregnation process, bubbles are easily generated in the impregnant, and the impregnation effect is influenced.
The Chinese patent with the prior publication number of CN107452509A discloses a production process of an aluminum electrolytic capacitor, which comprises the following contents: a. corroding the aluminum foil; b. oxidizing the aluminum foil; c. winding the core package; d. dipping the electrolyte; e. and (5) sealing the aluminum shell.
The above prior art solutions have the following drawbacks: in the process of impregnation, air in an impregnant conveying pipeline is not removed, and the quality of the produced capacitor is influenced by bubbles generated by dye liquor in the process of impregnant transportation.
Disclosure of Invention
The invention aims to provide capacitor production equipment and a capacitor production process, which have the advantages that air in an impregnant conveying pipeline is removed, and the quality of produced capacitors is ensured.
The invention aims at: provided is a capacitor production apparatus having an effect of securing the quality of a capacitor.
The first objective of the present invention is achieved by the following technical solutions: the utility model provides a condenser production facility, includes the vacuum tank, the upper end of vacuum tank is connected with first vacuum pump, vacuum tank lower extreme intercommunication has the notes oil pipe, the side intercommunication of vacuum tank has the buffer tube, the buffer tube is equipped with the pipeline valve with the vacuum tank junction, the intercommunication has the gas release pipe on the upper end outer wall of buffer tube, the upper end of gas release pipe is provided with the relief port, the gas release pipe diminishes again by the earlier increase of the diameter of lower supreme cross section, be equipped with the floating block in the gas release pipe, the outer wall of floating block and the laminating of the inner wall of gas release pipe lower extreme, the end-to-end connection of buffer tube has the drawing liquid pump, the drawing liquid end of drawing liquid pump is connected with the liquid suction pipe, the end-.
Through the technical scheme, before the capacitor is injected with oil, the pipeline valve is closed, and the first vacuum tank is started to vacuumize the capacitor. The liquid pump is started to convey the insulating oil to the buffer tube, the floating block is attached to the inner wall of the bottom end of the gas release tube under the action of gravity, and the pipeline valve is in a closed state, so that the buffer tube is in a closed state. The air in the buffer tube is compressed along with the entering of the insulating oil, so that the pressure in the buffer tube is increased, and the air in the buffer tube can jack up the floating block in the air release tube and is discharged through the air release port. And after the buffer tube is filled with the insulating oil, the insulating oil enters the air discharge tube under the pressure action of the liquid drawing pump, and the floating block floats along with the rise of the liquid level of the insulating oil in the air discharge tube. Until the floating ball floats to the air outlet, the air in the liquid pumping pipe and the buffer pipe is discharged through the air outlet, so that bubbles generated when the capacitor is filled with oil are avoided, and the dipping effect of the capacitor is ensured.
The invention is further configured to: the floating block comprises an upper cone and a lower cone, the upper cone and the lower cone are same in shape and size, the bottom surfaces of the upper cone and the lower cone are in relative coaxial connection, the diameter of the bottom surfaces of the upper cone and the lower cone is smaller than that of the maximum cross section of the middle part of the gas release pipe, and the diameter of the bottom surfaces of the upper cone and the lower cone is larger than that of the minimum cross section of two ends of the gas release pipe.
Through above-mentioned technical scheme, the surface of going up cone and lower cone is better with the internal surface laminating nature of bleed pipe, has guaranteed the leakproofness when cone and the laminating of bleed pipe lower extreme inner wall down, avoids simultaneously that the cone is not inseparable with the laminating of bleed pipe upper end inner wall, leads to having insulating oil to spout from the gas vent department. The diameters of the bottom surfaces of the upper cone and the lower cone are smaller than the diameter of the maximum cross section at the middle part of the air release pipe, and the diameters of the bottom surfaces of the upper cone and the lower cone are larger than the diameter of the minimum cross section at the two ends of the air release pipe, so that the floating block can only move in the air release pipe.
The invention is further configured to: the top end of the upper cone is coaxially connected with a fixed rod, the upper end of the fixed rod extends out of the air release port, the cross section area of the fixed rod is equal to that of the air release port, and the fixed rod is provided with a vent groove extending along the length direction.
Through the technical scheme, the fixed rod fixes the motion track of the floating block in the air discharge pipe, so that the floating block keeps moving in the same axial direction with the air discharge pipe. The floating block is prevented from inclining when rising and falling along with the liquid level and being incapable of being attached to the inner wall of the upper end and the lower end of the air discharging pipe.
The invention is further configured to: the end-to-end connection of notes oil pipe has the vacuum protection case, the vacuum protection case includes the box, can dismantle on the box and be connected with and place the door, it inserts in the box to annotate the oil pipe and pass the upper end of box, the intercommunication has the second vacuum pump on the outer wall of box one side.
Through the technical scheme, the first vacuum pump and the second vacuum pump are simultaneously opened, so that the vacuum protection box and the capacitor are simultaneously vacuumized, and the pressure intensity in the vacuum protection box and the pressure intensity in the capacitor are controlled to be the same. Avoid when to the condenser evacuation, the pressure in the condenser diminishes, and the condenser receives atmospheric pressure's effect and produces deformation, places the door and can dismantle with the box and be connected, is convenient for put into the vacuum protection case with the condenser.
The invention is further configured to: the oil injection pipe is detachably connected with the box body, and a sealing ring is arranged at the joint of the oil injection pipe and the box body.
Through above-mentioned technical scheme, the pressure difference is great inside and outside the vacuum protection case, and deformation takes place easily for long-time the use, and the notes oil pipe can be dismantled with the box and be connected and be convenient for change the vacuum protection case, and the sealing washer makes notes oil pipe and vacuum protection case sealing connection, guarantees the seal of vacuum protection case.
The invention is further configured to: the outer wall of the vacuum tank is communicated with a first vacuum meter, and the vacuum protection box is communicated with a second vacuum meter.
Through the technical scheme, the pressure value in the capacitor can be obtained through the first vacuum meter, the pressure value in the vacuum protection box can be obtained through the second vacuum meter, and the pressure in the capacitor and the vacuum protection box can be conveniently adjusted.
The invention is further configured to: the outer wall of the upper end of the air release pipe is sleeved with a liquid receiving ring, and the inner ring of the liquid receiving ring is attached to the outer wall of the air release pipe.
Through above-mentioned technical scheme, connect the liquid ring and be used for receiving a small amount of insulating oil from the relief port quilt extrusion, avoid causing the waste.
The invention is further configured to: the tail end of the first vacuum pump is connected with a condenser.
Through above-mentioned technical scheme, the condenser directly condenses the vapor that the vacuum pump was taken out, is convenient for collect.
The invention is further configured to: and a PLC control cabinet is arranged on one side of the vacuum tank and is connected with the first vacuum pump and the second vacuum pump.
Through the technical scheme, the pressure in the capacitor and the vacuum protection box can be conveniently regulated and controlled through the PLC control cabinet.
The second purpose of the invention is that: a capacitor production process is provided which also has the effect of capacitor quality.
The second purpose of the invention is realized by the following technical scheme:
s1, cutting the die: thinning and cutting the zinc-aluminum alloy into metal sheets;
s2, winding: absorbing electrolyte on the electrolytic paper and then winding the electrolytic paper and the metal sheet layer by layer;
s3, spraying gold: spraying gold on two sides of the electrolytic paper and the metal sheet;
s4, welding: welding the capacitor lead with the electrolytic paper and two sides of the metal sheet;
s5, assembling: placing electrolytic paper and a metal sheet in an aluminum shell with an immersion opening;
s6, vacuum oil injection:
a. heating the insulating oil to 70-80 ℃ for 12 hours;
b. inserting an oil filling pipe of the vacuum tank into a vacuum protection box, opening a placing door, placing the capacitor into the vacuum protection box, and hermetically communicating the tail end of the oil filling pipe with a dipping port on the aluminum shell;
c. closing the pipeline valve, opening the first vacuum pump and the second vacuum pump, simultaneously vacuumizing the capacitor and the vacuum protection shell to 100pa, then keeping for 5h, regulating and controlling the first vacuum pump and the second vacuum pump, simultaneously vacuumizing the capacitor and the vacuum protection shell to 2pa, and then keeping for 10 h;
d. opening a liquid pump until the fixing rods extend out of the air release port, opening a pipeline valve to fill oil into the capacitor, and closing the liquid pump and the pipeline valve for 30min when the capacitor is filled with insulating oil;
e. stopping the first vacuum pump and the second vacuum pump, opening a pipeline valve, starting a liquid pump to perform reverse liquid pumping, and pumping the insulating oil in the capacitor back to the oil tank;
f. after the capacitor had cooled, the capacitor was removed from the vacuum containment vessel and the dip port was wax sealed.
Through above-mentioned technical scheme, get rid of the moisture in the insulating oil, avoided producing a large amount of vapor when flooding, improved the effect to the condenser evacuation, reduced impurity in the condenser to the influence of flooding effect, avoided the inside and outside pressure difference of condenser to make the condenser take place deformation greatly simultaneously, when flooding, avoided the production of bubble, guaranteed the effect of flooding.
In conclusion, the beneficial technical effects of the invention are as follows:
1. air bubbles are prevented from being generated when the capacitor is filled with oil, and the effect of impregnating the capacitor is ensured;
2. deformation caused by large pressure difference inside and outside the capacitor when the capacitor is vacuumized is avoided;
3. the dead lever has fixed the motion orbit of floating block in the gas release pipe, avoids floating the block and rises along with the liquid level together and takes place the slope when descending, unable upper end and the lower extreme inner wall laminating with the gas release pipe.
Drawings
Fig. 1 is an overall configuration diagram of the present embodiment;
FIG. 2 is an exploded view of the present embodiment showing the internal structure of the vacuum protection box;
fig. 3 is a sectional view for showing the inner structure of the air bleeding tube in the present embodiment.
Description of the drawings, 1, a vacuum tank; 2. an oil filling pipe; 3. a capacitor; 4. an impregnation port; 5. a pipeline valve; 6. discharging the air pipe; 7. an air release port; 8. a floating block; 9. an upper cone; 10. a lower cone; 11. a rubber layer; 12. fixing the rod; 13. a vent channel; 14. a liquid receiving ring; 15. a liquid pump; 16. a liquid pumping pipe; 17. a condenser; 18. an oil tank; 19. a buffer tube; 20. a first vacuum pump; 21. a second vacuum pump; 22. a first vacuum gauge; 23. a second vacuum gauge; 24. a vacuum protection box; 25. a seal ring; 26. a PLC control cabinet; 27. a box body; 28. the door is placed.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The first embodiment is as follows:
referring to fig. 1 and 2, the capacitor production equipment disclosed by the invention comprises a vacuum tank 1, wherein the upper end of the vacuum tank 1 is connected with a first vacuum pump 20, the lower end of the vacuum tank 1 is communicated with an oil injection pipe 2, the tail end of the oil injection pipe 2 is connected with a vacuum protection box 24, the vacuum protection box 24 comprises a box body 27, a placing door 28 is detachably connected to the box body 27, and the oil injection pipe 2 penetrates through the upper end of the box body 27 and is inserted into the box body 27. The oil filling pipe 2 and the box body 27 can be detachably connected, so that the vacuum protection box 24 can be conveniently replaced, a sealing ring 25 is arranged at the joint of the box body 27 and the oil filling pipe 2, the sealing ring 25 enables the oil filling pipe 2 and the box body 27 to be connected in a sealing mode, and the sealing performance of the vacuum protection box 24 is guaranteed. The outer wall of one side of the box body 27 is communicated with a second vacuum pump 21, and the vacuum protection box 24 is arranged in a sealing way. The placing door 28 is opened, the capacitor 3 is placed in the vacuum protection box 24, and the filler pipe 2 is inserted into the dip port 4 of the capacitor 3, so that the outer wall of the filler pipe 2 is sealingly connected to the inner wall of the dip port 4. The side end of the vacuum tank 1 is communicated with a buffer tube 19, and a pipeline valve 5 is arranged at the joint of the vacuum tank 1 and the buffer tube 19. The outer wall of the upper end of the buffer tube 19 is communicated with an air release tube 6, and the upper end of the air release tube 6 is provided with an air release opening 7.
Referring to fig. 1, the line valve 5 is closed before the capacitor 3 is filled with oil. Vacuum tank 1 one side is provided with PLC switch board 26, and PLC switch board 26 is connected with first vacuum pump 20 and second vacuum pump 21. And simultaneously opening the first vacuum pump 20 and the second vacuum pump 21 through the PLC control cabinet 26, simultaneously vacuumizing the vacuum protection box 24 and the capacitor 3, and controlling the pressure in the vacuum protection box 24 and the capacitor 3 to be the same. When the capacitor 3 is vacuumized, the pressure in the capacitor 3 is reduced, and the capacitor 3 is prevented from being deformed under the action of atmospheric pressure. The outer wall of the vacuum tank 1 is communicated with a first vacuum gauge 22, and the vacuum protection box 24 is communicated with a second vacuum gauge 23, so that the pressure in the capacitor 3 and the vacuum protection box 24 can be obtained. The end of the first vacuum pump 20 is connected with a condenser 17, and the condenser 17 condenses the pumped steam for collection. The pipeline in the capacitor production equipment is made of stainless steel pipes, so that deformation in a vacuum state is avoided.
Referring to fig. 3, the diameter of the cross section of the bleed tube 6 increases from bottom to top and then decreases, and the maximum cross section of the bleed tube 6 is located at the same distance from the bleed orifice 7 as the connection with the buffer tube 19. The air release pipe 6 is divided into an upper part and a lower part by taking the maximum cross section as a boundary surface, the floating block 8 is put into the air release pipe 6 through the boundary surface of the air release pipe 6, and then the upper part and the lower part of the air release pipe 6 are welded. The floating block 8 comprises an upper cone 9 and a lower cone 10, the upper cone 9 and the lower cone 10 are the same in shape and size, and the bottom surfaces of the upper cone 9 and the lower cone 10 are connected coaxially and oppositely. The diameter of the bottom surfaces of the upper cone 9 and the lower cone 10 is smaller than that of the maximum cross section of the middle of the air release pipe 6, so that the floating block 8 can move up and down in the air release pipe 6, and the diameter of the bottom surfaces of the cones and the lower cone 10 is larger than that of the minimum cross sections of the two ends of the air release pipe 6, so that the floating block 8 cannot move out from the upper end and the lower end of the air release pipe 6.
Referring to fig. 1 and 3, an aspiration pump 15 is attached to the end of buffer tube 19, and an aspiration tube 16 is attached to the aspiration end of aspiration pump 15. The end of the liquid suction pipe 16 is connected to an oil tank 18 containing insulating oil, which is delivered to a buffer pipe 19 by activating the liquid suction pump 15. The level of insulating oil in buffer tube 19 will gradually rise. At this time, the floating block 8 is under the action of gravity, the outer wall of the lower cone 10 of the floating block 8 is attached to the inner wall of the bottom end of the gas release pipe 6, and meanwhile, the pipeline valve 5 is in a closed state, so that the buffer pipe 19 is in a closed state. The air in the buffer tube 19 is compressed along with the entering of the insulating oil, the pressure in the buffer tube 19 becomes higher, and the air in the buffer tube 19 can jack up the floating block 8 in the air release pipe 6 and is discharged through the air release hole 7. Until the buffer tube 19 is filled with insulating oil, the insulating oil is forced into the bleed tube 6 by the pressure of the liquid pump 15, and the floating block 8 floats as the level of the insulating oil in the bleed tube 6 rises. The floating block 8 is under the buoyancy of the insulating oil and the action of self gravity, so that the lower cone 10 and part of the upper cone 9 of the floating block 8 are positioned below the liquid level of the hydraulic oil. When the outer wall of the upper cone 9 of the floating block 8 is attached to the inner wall of the upper end of the air release pipe 6, air and insulating oil between the outer wall of the upper cone 9 and the inner wall of the upper end of the air release pipe 6 are discharged through the air release port 7, meanwhile, the air release port 7 is blocked by the upper cone 9 of the floating block 8, and the insulating oil cannot be sprayed out.
Referring to fig. 1 and 3, after the outer wall of the upper cone 9 is attached to the inner wall of the upper end of the gas release pipe 6, the pipeline valve 5 is opened to fill the capacitor 3 with oil, and when the oil pressure output by the liquid pump 15 is kept unchanged, the floating block 8 is kept attached to the inner wall of the upper end of the gas release pipe 6, and the vacuum tank 1 and the capacitor 3 are kept in a vacuum state. When the oil pressure output by the liquid pump 15 is reduced, the liquid level in the air release pipe 6 is reduced, the floating block 8 falls along with the reduction of the liquid level of the air release pipe 6 until the outer wall of the lower cone 10 of the floating block 8 is attached to the inner wall of the lower end of the air release pipe 6, and at this time, a small amount of insulating oil still exists above the floating block 8 in the air release pipe 6, so that the sealing property between the floating block 8 and the air release pipe 6 is improved. When the liquid level in the buffer tube 19 continues to drop, the part of the buffer tube 19 which is not filled with oil is in a vacuum state, and the floating block 8 is connected with the inner wall of the air discharging tube 6 more tightly under the action of air pressure, so that the capacitor 3 is kept in a vacuum state in the whole oil filling process. The inner wall of the air release pipe 6 is provided with a rubber layer 11, so that the outer wall of the floating block 8 is attached to the inner wall of the air release pipe 6 more tightly. The top end of the upper cone 9 is coaxially connected with a fixed rod 12, the upper end of the fixed rod 12 extends out of the air release port, the cross section area of the fixed rod 12 is equal to that of the air release port, and the fixed rod 12 is provided with a vent groove 13 extending along the length direction. The fixed rod 12 fixes the motion track of the floating block 8 in the air release pipe 6, so that the floating block 8 keeps moving coaxially with the air release pipe 6. The floating block 8 is prevented from inclining when rising and falling along with the liquid level and being incapable of being attached to the inner walls of the upper end and the lower end of the air release pipe 6.
Referring to fig. 3, the outer wall of the upper end of the gas discharge pipe 6 is sleeved with a liquid receiving ring 14, and the inner ring of the liquid receiving ring 14 is attached to the outer wall of the gas discharge pipe 6. The liquid receiving ring is used for receiving a small amount of insulating oil pressed out from the air release opening 7, and waste is avoided. The floating block 8 is hollow, so that the floating block 8 is easier to float, the part of the upper cone 9 below the liquid level of the insulating oil is reduced, and the extruded quantity of the insulating oil is reduced.
The implementation principle of the embodiment is as follows: before the capacitor 3 is filled with oil, the pipeline valve 5 is closed, the capacitor 3 and the vacuum protection tank are simultaneously vacuumized through the first vacuum pump 20 and the second vacuum pump 21, and deformation caused by large pressure difference between the inside and the outside of the capacitor 3 and the action of atmospheric pressure is avoided. The pump 15 is activated to deliver the insulating oil into buffer tube 19 and the level of the insulating oil in buffer tube 19 will gradually rise. At this time, the floating block 8 is under the action of gravity, the outer wall of the lower cone 10 is attached to the inner wall of the bottom end of the gas release pipe 6, and the pipeline valve 5 is in a closed state, so that the buffer pipe 19 is in a closed state. The air in the buffer tube 19 is compressed along with the entering of the insulating oil, the pressure in the buffer tube 19 becomes higher, and the air in the buffer tube 19 and the liquid pumping tube 16 can jack up the floating block 8 in the air release tube 6 and is discharged through the air release opening 7. Until the buffer tube 19 is filled with insulating oil, the insulating oil is forced into the bleed tube 6 by the pressure of the liquid pump 15, and the floating block 8 floats as the level of the insulating oil in the bleed tube 6 rises. The floating block 8 is under the buoyancy of the insulating oil and the action of self gravity, so that the lower cone 10 and part of the upper cone 9 of the floating block 8 are positioned below the liquid level of the hydraulic oil. When the outer wall of the upper cone 9 of the floating block 8 is attached to the inner wall of the upper end of the air release pipe 6, air and insulating oil between the outer wall of the upper cone 9 and the inner wall of the upper end of the air release pipe 6 are discharged through the air release port 7, meanwhile, the air release port 7 is blocked by the upper cone 9 of the floating block 8, and the insulating oil cannot be sprayed out.
Example two:
referring to fig. 2, a capacitor production process includes the steps of:
s1, cutting the die: thinning and cutting the zinc-aluminum alloy into metal sheets suitable for producing the capacitor 3;
s2, winding: placing the electrolytic paper on a metal sheet after absorbing the electrolyte, and winding the electrolytic paper and the metal sheet layer by layer to form a cylinder;
s3, spraying gold: spraying gold on two sides of a cylinder formed by winding the electrolytic paper and the metal sheet so as to facilitate welding;
s4, welding: respectively welding a capacitor positive lead and a capacitor negative lead with two sides of the electrolytic paper and the metal sheet;
s5, assembling: placing a cylinder formed by electrolytic paper and metal sheets in an aluminum shell with a dipping port 4;
s6, vacuum oil injection:
a. heating the insulating oil to 70-80 ℃ for 12h, and removing water in the insulating oil;
b. inserting the oil filling pipe 2 of the vacuum tank 1 into the vacuum protection box 24, opening the placing door 28, placing the capacitor 3 into the vacuum protection box 24, and hermetically communicating the tail end of the oil filling pipe 2 with the impregnation port 4 on the aluminum shell;
c. closing the pipeline valve 5, opening the first vacuum pump 20 and the second vacuum pump 21 through the PLC control cabinet 26, obtaining the pressure in the capacitor 3 and the vacuum protective shell through the first vacuum meter 22 and the second vacuum meter 23, vacuumizing the capacitor 3 and the vacuum protective shell to 100pa simultaneously, keeping for 5h, regulating and controlling the first vacuum pump 20 and the second vacuum pump 21 through the PLC control cabinet 26, vacuumizing the capacitor 3 and the vacuum protective shell to 2pa simultaneously, and keeping for 10 h;
d. opening the liquid pump 15 until the fixed rod 12 extends out of the air release port, discharging air in the liquid pumping pipe 16 and the buffer pipe 19, opening the pipeline valve 5 to fill the capacitor 3 with oil, and closing the liquid pump 15 and the pipeline valve 5 for 30min when the capacitor 3 is filled with insulating oil, so that the insulating oil is used for soaking the capacitor 3;
e. stopping the first vacuum pump 20 and the second vacuum pump 21, opening the pipeline valve 5, starting the liquid pump 15 to perform reverse liquid pumping, and pumping the insulating oil in the capacitor 3 back to the oil tank 18;
f. after the capacitor 3 is cooled, the capacitor 3 is taken out of the vacuum vessel, and the impregnation port 4 is wax-sealed.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (10)
1. The capacitor production equipment is characterized by comprising a vacuum tank (1), wherein the upper end of the vacuum tank (1) is connected with a first vacuum pump (20), the lower end of the vacuum tank (1) is communicated with an oil injection pipe (2), the side end of the vacuum tank (1) is communicated with a buffer pipe (19), a pipeline valve (5) is arranged at the joint of the buffer pipe (19) and the vacuum tank (1), an air release pipe (6) is communicated on the outer wall of the upper end of the buffer pipe (19), an air release port (7) is arranged at the upper end of the air release pipe (6), the diameter of the cross section of the air release pipe (6) is increased and then reduced from bottom to top, a floating block (8) is arranged in the air release pipe (6), the outer wall of the floating block (8) is attached to the inner wall of the lower end of the air release pipe (6), the tail end of the air release pipe (19) is connected with an extraction pump (15), and the liquid extraction end of, the tail end of the liquid pumping pipe (16) is connected with an oil tank (18).
2. The capacitor production equipment as claimed in claim 1, wherein the floating block (8) comprises an upper cone (9) and a lower cone (10), the upper cone (9) and the lower cone (10) are the same in shape and size, the bottom surfaces of the upper cone (9) and the lower cone (10) are relatively coaxially connected, the diameter of the bottom surfaces of the upper cone (9) and the lower cone (10) is smaller than that of the maximum cross section at the middle of the gas discharge pipe (6), and the diameter of the bottom surfaces of the upper cone (9) and the lower cone (10) is larger than that of the minimum cross section at two ends of the gas discharge pipe (6).
3. The capacitor production apparatus as claimed in claim 2, wherein the top end of the upper cone (9) is coaxially connected with a fixing rod (12), the upper end of the fixing rod (12) protrudes from the air release opening, the cross-sectional area of the fixing rod (12) is equal to that of the air release opening, and the fixing rod (12) is provided with a vent groove (13) extending in the length direction.
4. The capacitor production equipment as claimed in claim 1, wherein a vacuum protection box (24) is connected to the end of the oil filling pipe (2), the vacuum protection box (24) comprises a box body (27), a placing door (28) is detachably connected to the box body (27), the oil filling pipe (2) penetrates through the upper end of the box body (27) and is inserted into the box body (27), and a second vacuum pump (21) is communicated with the outer wall of one side of the box body (27).
5. A capacitor production apparatus as claimed in claim 4, characterized in that the filler pipe (2) is detachably connected to the tank (27), and a seal ring (25) is provided at the connection of the filler pipe (2) and the tank (27).
6. The capacitor production equipment according to claim 1, wherein the outer wall of the vacuum tank (1) is communicated with a first vacuum gauge (22), and the vacuum protection box (24) is communicated with a second vacuum gauge (23).
7. The capacitor production equipment according to claim 1, wherein a liquid receiving ring (14) is sleeved on the outer wall of the upper end of the gas release pipe (6), and the inner ring of the liquid receiving ring (14) is attached to the outer wall of the gas release pipe (6).
8. Capacitor production plant according to claim 7, characterized in that a condenser (17) is connected to the end of the first vacuum pump (20).
9. Capacitor production plant according to claim 1, characterized in that the vacuum tank (1) is provided on one side with a PLC control cabinet (26), the PLC control cabinet (26) being connected to the first vacuum pump (20) and the second vacuum pump (21).
10. A capacitor production process applied to the capacitor production apparatus according to any one of claims 1 to 9, characterized by comprising the steps of:
s1, cutting the die: thinning and cutting the zinc-aluminum alloy into metal sheets;
s2, winding: absorbing electrolyte on the electrolytic paper and then winding the electrolytic paper and the metal sheet layer by layer;
s3, spraying gold: spraying gold on two sides of the electrolytic paper and the metal sheet;
s4, welding: welding the capacitor lead with the electrolytic paper and two sides of the metal sheet;
s5, assembling: placing electrolytic paper and metal sheets in an aluminum shell with an impregnation port (4);
s6, vacuum oil injection:
a. heating the insulating oil to 70-80 ℃ for 12 hours;
b. inserting an oil filling pipe (2) of a vacuum tank (1) into a vacuum protection box (24), opening a placing door (28), placing a capacitor (3) into the vacuum protection box (24), and hermetically communicating the tail end of the oil filling pipe (2) with a dipping port (4) on an aluminum shell;
c. closing the pipeline valve (5), opening the first vacuum pump (20) and the second vacuum pump (21), simultaneously vacuumizing the capacitor (3) and the vacuum protective shell to 100pa, then keeping for 5h, regulating and controlling the first vacuum pump (20) and the second vacuum pump (21), simultaneously vacuumizing the capacitor (3) and the vacuum protective shell to 2pa, and then keeping for 10 h;
d. opening the liquid pump (15), opening the pipeline valve (5) to fill oil into the capacitor (3) until the fixing rod (12) extends out of the air release port, and closing the liquid pump (15) and the pipeline valve (5) for 30min when the capacitor (3) is filled with insulating oil;
e. stopping the first vacuum pump (20) and the second vacuum pump (21), opening the pipeline valve (5), starting the liquid pump (15) to perform reverse liquid pumping, and pumping the insulating oil in the capacitor (3) back to the oil tank (18);
f. after the capacitor (3) is cooled, the capacitor (3) is taken out of the vacuum protective shell, and the impregnation port (4) is sealed by wax.
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| CN110060888A (en) * | 2019-04-30 | 2019-07-26 | 益阳市万京源电子有限公司 | A kind of durable electrolytic capacitor contains dipping machine |
| CN110828123A (en) * | 2019-11-28 | 2020-02-21 | 利锐特电气有限公司 | Vacuum oil injection system for transformer |
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| JPH1091245A (en) * | 1996-09-11 | 1998-04-10 | Ii M M:Kk | Liquid injection device |
| CN2353059Y (en) * | 1998-12-03 | 1999-12-08 | 合阳电力电容器制造有限责任公司 | Apparatus for filling oil into oil-container capacitor |
| JP2006080106A (en) * | 2004-09-07 | 2006-03-23 | Meidensha Corp | Method and device for injecting electrolyte of electric double layer capacitor |
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| CN111599611B (en) | 2022-04-05 |
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