CN214672227U - Capacitor core impregnating equipment convenient to control - Google Patents

Capacitor core impregnating equipment convenient to control Download PDF

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Publication number
CN214672227U
CN214672227U CN202120013889.2U CN202120013889U CN214672227U CN 214672227 U CN214672227 U CN 214672227U CN 202120013889 U CN202120013889 U CN 202120013889U CN 214672227 U CN214672227 U CN 214672227U
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Prior art keywords
tank
impregnation
pressure
pressurized
flooding
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CN202120013889.2U
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Chinese (zh)
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安卫军
张桐
周君
邓小龙
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Chengdu Hongming Electronics Co Ltd
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Chengdu Hongming Electronics Co Ltd
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Abstract

The utility model discloses a condenser core flooding equipment convenient to control, the flooding cover is installed on the upper portion of flooding tank, the outer wall of flooding tank is equipped with flooding tank heating heat preservation, the well upper portion of flooding tank communicates with each other and is connected with flooding tank exhaust tube and flooding tank intake pipe, the interior bottom of pressurized tank is less than the interior bottom of flooding tank, the outer wall of pressurized tank is equipped with pressurized tank heating heat preservation, the well upper portion of pressurized tank communicates with each other and is connected with pressurized tank notes liquid pipe, pressurized tank force tube, pressurized tank exhaust tube and pressurized tank balance trachea, through liquid pipe intercommunication between the bottom of flooding tank and the bottom of pressurized tank. The utility model discloses a pressurization jar and the steeping jar that communicate each other cooperate and carry out the flooding operation, can discharge the inside air of condenser core more fully and realize more abundant flooding effect, and the withstand voltage qualification rate of condenser core is showing and is improving, and the stability of withstand voltage isoelectric property also is showing and is improving in the long-term working process.

Description

Capacitor core impregnating equipment convenient to control
Technical Field
The utility model relates to a condenser core flooding equipment especially relates to a condenser core flooding equipment convenient to control.
Background
At present, organic and composite dielectric film capacitors are widely used in various power electronic circuits, and most of high voltage power capacitors have excellent electrical properties and reliability by impregnating their cores with different insulating oils or epoxy resins, etc., so that different impregnation equipment and impregnation methods may have different effects on the performance of the capacitors.
The traditional capacitor core impregnation equipment mainly adopts an impregnation tank which can be heated and vacuumized, and the impregnation method comprises the following steps: when the impregnation is started, two ends of the capacitor core to be impregnated are vertically arranged in order one above the other and are placed in an impregnation box in a tank; then heating and vacuumizing the interior of the tank body, and keeping for a period of time to ensure that the environmental condition is stable. And then, slowly injecting impregnation liquid into the impregnation box to ensure that the liquid level submerges the capacitor core within a certain time, keeping for a period of time, finally closing the vacuum pump, opening the air valve to communicate with the outside, and recovering the normal atmospheric condition in the tank.
The traditional capacitor core impregnation equipment and the impregnation method have the following defects:
(1) only one impregnation tank is provided, and the capacitor core and the impregnation liquid cannot be subjected to impregnation pretreatment respectively according to different conditions (temperature, vacuum degree, time and the like).
(2) The flow rate of the impregnating solution can only be controlled, so that the capacitor core can be slowly immersed, the impregnating solution is mainly infiltrated by the diffusion force of the impregnating solution between layers in the core, a strong driving force is lacked, the core with small length and large inner gap can still achieve a good impregnating effect, but when the capacitor core is longer and the interlayer gap is small, the core is probably not fully infiltrated due to insufficient diffusion force of the impregnating solution, a part of area still left in the core after the whole impregnating process is finished is not infiltrated by the sufficient impregnating solution, the phenomenon of poor batch impregnation often occurs, the voltage-resistant qualification rate of the core is low, and the stability of electric properties such as voltage resistance in the long-term working process is also poor.
(3) Two ends of a capacitor core to be impregnated are vertically arranged one above the other, when the impregnation liquid moves upwards from the bottom, the lower end face of the core can be quickly submerged and covered, gas in the core can only escape from the upper end face of the core, the area of an escape channel is small, and the gas is discharged and the impregnation liquid is not thoroughly impregnated.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a fully just be convenient for control's of flooding condenser core flooding equipment for solving above-mentioned problem.
The utility model discloses a following technical scheme realizes above-mentioned purpose:
the utility model provides a condenser core flooding equipment convenient to control, includes the steeping vat, the steeping jar cover is installed on the upper portion of steeping vat, the outer wall of steeping vat is equipped with steeping vat heating heat preservation, the well upper portion of steeping vat communicates with each other and is connected with the steeping vat exhaust tube that is used for the evacuation and is used for the steeping vat intake pipe that admits air, the condenser core flooding equipment convenient to control still includes the pressurized canister, the interior bottom of pressurized canister is less than the interior bottom of steeping vat, the outer wall of pressurized canister is equipped with pressurized canister heating heat preservation, the well upper portion of pressurized canister communicates with each other and is connected with the pressurized canister that is used for injecting the steeping liquor and annotates the liquid pipe, is used for filling into high-pressure gas's pressurized canister pressurized pipe, is used for the pressurized canister exhaust tube of evacuation and is used for the balanced jar of atmospheric pressure in the jar, the bottom of steeping canister with through liquid pipe intercommunication between the bottom of pressurized canister, the device is characterized in that valves are respectively arranged on the dipping tank exhaust tube, the dipping tank air inlet tube, the pressurizing tank liquid injection tube, the pressurizing tank pressurizing tube, the pressurizing tank exhaust tube, the pressurizing tank balance air tube and the liquid tube. The heating and heat-insulating layer of the impregnation tank and the heating and heat-insulating layer of the pressurization tank are both devices with heating and heat-insulating functions, preferably, a conventional oil circulating device taking hot oil as a medium comprises an oil pipe and an electric heater, wherein the electric heater is used for heating the oil in the oil pipe, the hot oil circularly flows in the oil pipe, after being heated to a proper temperature, the heating is stopped, and the oil is reheated when the temperature is lower than the proper temperature, so that the heating and heat-insulating functions are realized.
Preferably, in order to further improve the impregnation effect, a mounting bracket for mounting the capacitor core is mounted in the impregnation tank, and the mounting bracket satisfies the following conditions: after the capacitor core is installed on the installation support, an included angle of 10-60 degrees is formed between a connecting straight line between two dipping end surfaces of the capacitor core and the vertical direction.
Preferably, in order to facilitate processing and impregnation of a plurality of capacitor cores at a time, the mounting bracket includes a horizontal conical bottom plate and a vertical trumpet-shaped cylinder which are connected with each other, a central point of the conical bottom plate protrudes upward, an included angle between a connecting straight line between the central point and any point of an edge and the horizontal direction is 10-60 degrees, and the lower end of the trumpet-shaped cylinder with a large upper part and a small lower part is connected with the edge of the conical bottom plate. The size of an included angle between the wall of the horn-shaped cylinder and the vertical direction is determined according to the size of the capacitor core, so that the lower end face of the capacitor core is in surface-to-surface contact with the surface of the conical bottom plate after the capacitor core is placed on the conical bottom plate.
Preferably, in order to facilitate the control of the impregnation fluid to meet the impregnation requirement, the diameter of the pressurization tank is not less than 2 times of the diameter of the impregnation tank, and the volume of the pressurization tank is not less than 1.2 times of the volume of the impregnation tank.
Preferably, in order to facilitate observation of the conditions inside the tank, a sealed and transparent immersion observation window is provided in the middle of the immersion tank cover, a pressure tank cover is attached to the upper part of the pressure tank, and a sealed and transparent pressure observation window is provided in the middle of the pressure tank cover.
Preferably, in order to facilitate the discharge of the impregnation fluid, a drain pipe is connected to the lower part of the liquid pipe in a communicating manner, and a valve for draining liquid is mounted on the drain pipe.
Preferably, in order to realize automatic control, the middle upper part of the impregnation tank is also provided with an impregnation tank pressure sensor for detecting the air pressure in the impregnation tank and an impregnation tank temperature sensor for detecting the temperature in the impregnation tank, the middle upper part of the pressure tank is also provided with a pressure sensor of the pressure tank for detecting the air pressure in the pressure tank and a temperature sensor of the pressure tank for detecting the temperature in the pressure tank, the signal output end of the impregnation tank pressure sensor, the signal output end of the impregnation tank temperature sensor, the signal output end of the pressure tank pressure sensor and the signal output end of the pressure tank temperature sensor are respectively and correspondingly connected with the signal input end of the controller, the valve is an electromagnetic valve, and the control input end of the electromagnetic valve, the control input end of the heating and insulating layer of the impregnation tank and the control input end of the heating and insulating layer of the pressurization tank are respectively connected with the control output end of the controller.
The beneficial effects of the utility model reside in that:
the utility model adopts the mutually communicated pressure tank and the impregnation tank to mutually cooperate for impregnation operation, can carry out impregnation pretreatment on the capacitor core and the impregnation liquid according to different conditions (temperature, vacuum degree, time and the like), and can utilize the valve on the liquid pipe to accurately control the flow of the impregnation liquid entering the impregnation tank, so that the liquid level in the impregnation tank can keep a slow speed to gradually immerse the capacitor core, so that the attached air on the upper part of the capacitor core can be discharged into the upper space in the impregnation tank under the action of the driving force formed by the rising of the liquid level and is pumped away by the vacuum pump, meanwhile, the pressure tank pressure pipe is arranged on the pressure tank, high-pressure gas can be input into the pressure tank, the impregnation liquid has larger pressure, the impregnation liquid can be squeezed to permeate into the deeper inner area of the capacitor core, thereby more fully discharging the air inside the capacitor core and realizing more sufficient impregnation effect, the voltage-resistant qualification rate of the capacitor core is obviously improved, and the stability of electric properties such as voltage resistance and the like in the long-term working process is also obviously improved; through set up the installing support in the impregnating vessel to make the straight line of connection between two flooding terminal surfaces of condenser core and vertical through the installing support have 10 ~ 60 contained angles, can prolong the flow path of flooding liquid in the condenser core, the time that terminal surface is "closed" by the flooding liquid under the condenser core "postpones" simultaneously, increases the passageway of the inside gas loss of condenser core, thereby improves the infiltration effect of flooding liquid.
Drawings
Fig. 1 is a schematic structural view of a capacitor core dipping device convenient to control according to the present invention.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings:
as shown in figure 1, condenser core flooding equipment convenient to control includes steeping vat 13 and pressurized tank 4, steeping vat cover 18 is installed on the upper portion of steeping vat 13, the outer wall of steeping vat 13 is equipped with steeping vat heating heat preservation 19, the well upper portion of steeping vat 13 communicates with each other and is connected with steeping vat exhaust tube 12 that is used for evacuation and steeping vat intake pipe 17 that is used for admitting air, the interior bottom of pressurized tank 4 is less than the interior bottom of steeping vat 13, the outer wall of pressurized tank 4 is equipped with pressurized tank heating heat preservation 10, the well upper portion of pressurized tank 4 communicates with each other and is connected with pressurized tank notes liquid pipe 2 that is used for injecting the steeping liquor, pressurized tank pressure pipe 1 that is used for filling high-pressure gas, pressurized tank exhaust tube 11 that is used for evacuation and pressurized tank balance trachea 8 that is used for balancing the internal atmospheric pressure of jar, communicate through 9 between the bottom of steeping vat 13 and the bottom of pressurized tank 4, on steeping tank exhaust tube 12 liquid pipe, Valves 3 are respectively arranged on an air inlet pipe 17 of the steeping tank, a liquid injection pipe 2 of the pressure tank, a pressure pipe 1 of the pressure tank, an exhaust pipe 11 of the pressure tank, a balance air pipe 8 of the pressure tank and a liquid pipe 9; preferably, a mounting bracket 14 for mounting the capacitor core 16 is installed in the impregnation tank 13, and the mounting bracket 14 satisfies the following conditions: after the capacitor core 16 is installed on the installation support 14, an included angle phi of 10-60 degrees is formed between a connecting straight line between two dipping end surfaces of the capacitor core and the vertical direction; the mounting bracket 14 comprises a transverse conical bottom plate (not marked in the figure) and a vertical trumpet-shaped cylinder (not marked in the figure) which are connected with each other, the central point of the conical bottom plate protrudes upwards, the included angle between the connecting straight line between the central point and any point of the edge and the horizontal direction is 10-60 degrees, and the lower end of the trumpet-shaped cylinder with the large upper part and the small lower part is connected with the edge of the conical bottom plate; the diameter of the pressure tank 4 is not less than 2 times of the diameter of the impregnation tank 13, and the volume of the pressure tank 4 is not less than 1.2 times of the volume of the impregnation tank 13; a sealed and transparent dipping observation window 15 is arranged in the middle of the dipping tank cover 18, a pressurizing tank cover 5 is arranged at the upper part of the pressurizing tank 4, and a sealed and transparent pressurizing observation window 6 is arranged in the middle of the pressurizing tank cover 5; one end of the lower part of the liquid pipe 9 is communicated with a liquid discharge pipe 7, and the liquid discharge pipe 7 is provided with a valve 3 for discharging liquid; the middle upper part of the impregnation tank 13 is also provided with an impregnation tank pressure sensor (not shown) for detecting the air pressure in the impregnation tank 13 and an impregnation tank temperature sensor (not shown) for detecting the temperature in the impregnation tank 13, the middle upper part of the pressurization tank 4 is also provided with a pressurization tank pressure sensor (not shown) for detecting the air pressure in the pressurization tank 4 and a pressurization tank temperature sensor (not shown) for detecting the temperature in the pressurization tank 4, the signal output end of the impregnation tank pressure sensor, the signal output end of the impregnation tank temperature sensor, the signal output end of the pressurization tank pressure sensor and the signal output end of the pressurization tank temperature sensor are respectively and correspondingly connected with the signal input end of a controller (not shown), the valve 3 is an electromagnetic valve, the control input end of the impregnation tank heating and insulating layer and the control input end of the pressurization tank heating and insulating layer are respectively and the control output end of the controller And (4) connecting.
In order to better understand the working principle and technical effect of the capacitor core dipping device convenient to control of the present invention, the following method is specifically described by taking the preferred positive and negative pressure alternate dipping method as an example, but the following method is not the only method of the present invention, nor the protection object of the present invention.
With reference to fig. 1, the utility model discloses a preferred positive negative pressure alternate dipping method that condenser core dipping apparatus convenient to control adopted, includes the following steps:
step 1, installing capacitor cores 16 on an installation support 14, specifically, placing a plurality of capacitor cores 16 on a conical bottom plate of the installation support 14 along the circumferential direction and contacting with the inner wall of a horn-shaped cylinder, wherein an included angle phi of 10-60 degrees exists between a connecting straight line between two dipping end surfaces of the capacitor cores 16 and the vertical direction, and covering a dipping tank cover 18; connecting an exhaust pipe 12 of the steeping tank with an external vacuum pump (not shown), connecting an injection pipe 2 of the pressure tank with an external steeping liquor container (not shown), connecting a pressure pipe 1 of the pressure tank with an external gas compressor (not shown), connecting an exhaust pipe 11 of the pressure tank with an external vacuum pump (not shown), and suspending the outer end of an air inlet pipe 17 of the steeping tank and the outer end of a balance air pipe 8 of the pressure tank;
step 2, closing all valves 3, opening a heating and insulating layer 19 of the impregnation tank to heat the impregnation tank 13, continuously maintaining the temperature after the temperature in the impregnation tank 13 reaches the temperature suitable for the working of the impregnation liquid, wherein the temperature is preferably 50 +/-5 ℃, opening the valve 3 on an exhaust pipe 12 of the impregnation tank, vacuumizing the impregnation tank 13 to ensure that the vacuum degree in the impregnation tank 13 reaches the value suitable for the impregnation operation, wherein the vacuum degree is preferably 4.5 +/-0.5 Pa, closing the valve 3 on the exhaust pipe 12 of the impregnation tank, stopping vacuumizing, and maintaining the vacuum state in the impregnation tank 13;
step 3, opening a valve 3 on the liquid injection pipe 2 of the pressurized tank, injecting the steeping liquor and meeting the following conditions: the liquid level of the impregnation liquid in the pressure tank 4 is at the same height as the inner bottom of the impregnation tank 13, and the impregnation liquid in the pressure tank 4 can fill the inner cavity of the impregnation tank 13 provided with the capacitor core 16 under the pressurized condition;
step 4, opening a heating and insulating layer 10 of the pressure tank to heat the pressure tank 4, continuously keeping the temperature after the temperature in the pressure tank 4 reaches the working temperature of the steeping liquor, wherein the temperature is preferably 50 +/-5 ℃, opening a valve 3 on an exhaust pipe 11 of the pressure tank, vacuumizing the pressure tank 4 to ensure that the vacuum degree in the pressure tank 4 reaches the value suitable for discharging bubbles in the steeping liquor, wherein the vacuum degree is preferably 4.5 +/-0.5 Pa, closing the valve 3 on the exhaust pipe 11 of the pressure tank, stopping vacuumizing, and keeping the vacuum state in the pressure tank 4 for 10-20 min;
step 5, opening a valve 3 on a pressurizing pipe 1 and a liquid pipe 9 of the pressurizing tank, and conveying compressed gas into the pressurizing tank 4 to enable impregnation liquid to slowly flow into an impregnation tank 13 under the action of the pressure of the compressed gas in the pressurizing tank 4 and gradually flow over a capacitor core 16 to be impregnated, so that the inner cavity of the impregnation tank 13 is filled with the impregnation liquid finally, and the flowing time of the whole impregnation liquid is controlled within 30-40 min;
step 6, after the impregnation liquid is filled in the impregnation tank 13, continuously conveying compressed gas into the pressurization tank 13 to enable the air pressure in the pressurization tank 13 to reach 5-8 standard atmospheric pressures, and keeping for 10-20 min;
step 7, closing a valve 3 on a pressure pipe 1 of the pressure tank, stopping conveying compressed gas into the pressure tank 4, opening the valve 3 on a balance air pipe 8 of the pressure tank, releasing the compressed gas in the pressure tank 4, closing the valve 3 on the balance air pipe 8 of the pressure tank when the air pressure value in the pressure tank 4 is reduced to a standard atmospheric pressure, opening the valve 3 on an exhaust pipe 11 of the pressure tank, vacuumizing the pressure tank 4, enabling the impregnation liquid in the impregnation tank 13 to gradually flow into the pressure tank 4 under the action of self gravity until the liquid level in the impregnation tank 13 is flush with the inner bottom of the impregnation tank 13 or the liquid level in the pressure tank 4 is flush with the initial position, closing the valve 3 on the exhaust pipe 11 of the pressure tank, stopping vacuumizing, and keeping the pressure tank 4 in the vacuum state for 10-20 min;
step 8, setting the step 5 to the step 7 as a dipping process, and repeating 1 to 3 dipping processes;
step 9, closing the valve 3 on the liquid pipe 9, opening the valve 3 on the air inlet pipe 17 of the impregnation tank, allowing external air to enter the impregnation tank 13, opening the impregnation tank cover 18 after the air pressure value in the impregnation tank 13 reaches 1 standard atmospheric pressure, taking out the capacitor core 16, and closing the impregnation tank to heat the heat-insulating layer 19; opening a valve 3 on a balance air pipe 8 of the pressurization tank to allow external air to enter the pressurization tank 4, closing the valve 3 on the balance air pipe 8 of the pressurization tank and closing a heating insulation layer 10 of the pressurization tank when the air pressure value in the pressurization tank 4 reaches 1 standard atmospheric pressure;
and step 10, discharging the impregnation liquid in the pressure tank 4 and the liquid pipe 9, cleaning and drying the impregnation tank 13 and the pressure tank 4, and finishing the impregnation operation of the capacitor core 16.
The above-mentioned embodiment is only the preferred embodiment of the present invention, and is not to the limitation of the technical solution of the present invention, as long as the technical solution can be realized on the basis of the above-mentioned embodiment without creative work, all should be regarded as falling into the protection scope of the right of the present invention.

Claims (7)

1. The utility model provides a condenser core flooding equipment convenient to control, includes the steeping vat, the flooding cover is installed on the upper portion of steeping vat, the outer wall of steeping vat is equipped with steeping vat heating heat preservation, the well upper portion of steeping vat communicates with each other and is connected with the steeping vat exhaust tube that is used for the evacuation and is used for the steeping vat intake pipe that admits air, its characterized in that: capacitor core impregnating equipment convenient to control still includes the pressurized tank, the interior bottom of pressurized tank is less than the interior bottom of impregnating tank, the outer wall of pressurized tank is equipped with pressurized tank heating heat preservation, the well upper portion of pressurized tank communicates with each other and is connected with the pressurized tank that is used for injecting the maceration extract and annotates the liquid pipe, is used for filling into high-pressure gas's pressurized tank pressurized pipe, is used for the pressurized tank exhaust tube of evacuation and is used for balancing jar internal air pressure's pressurization jar balanced trachea, the bottom of impregnating tank with through liquid pipe intercommunication between the bottom of pressurized tank, on the impregnating tank exhaust tube the impregnating tank intake pipe on the pressurized tank notes liquid pipe on the pressurized tank exhaust tube on, on the pressurized tank exhaust tube on the balanced trachea of pressurized tank with install the valve on the liquid pipe respectively.
2. The capacitor element impregnation apparatus for facilitating control according to claim 1, wherein: the mounting bracket for mounting the capacitor core is mounted in the impregnation tank, and meets the following conditions: after the capacitor core is installed on the installation support, an included angle of 10-60 degrees is formed between a connecting straight line between two dipping end surfaces of the capacitor core and the vertical direction.
3. The capacitor element impregnation apparatus for facilitating control according to claim 2, wherein: the mounting bracket comprises a transverse conical bottom plate and a vertical trumpet-shaped cylinder which are connected with each other, the central point of the conical bottom plate protrudes upwards, the included angle between the horizontal direction and the connecting straight line between the central point and any point of the edge is 10-60 degrees, and the lower end of the trumpet-shaped cylinder with the larger upper part and the smaller lower part is connected with the edge of the conical bottom plate.
4. The capacitor element impregnation apparatus for facilitating control according to claim 1, wherein: the diameter of the pressurizing tank is not less than 2 times of the diameter of the impregnation tank, and the volume of the pressurizing tank is not less than 1.2 times of the volume of the impregnation tank.
5. The capacitor element impregnation apparatus for facilitating control according to claim 1, wherein: the middle part of the dipping tank cover is provided with a sealed and transparent dipping observation window, the upper part of the pressurizing tank is provided with a pressurizing tank cover, and the middle part of the pressurizing tank cover is provided with a sealed and transparent pressurizing observation window.
6. The capacitor element impregnation apparatus for facilitating control according to claim 1, wherein: the lower part of the liquid pipe is communicated with a liquid discharge pipe, and a valve for discharging liquid is arranged on the liquid discharge pipe.
7. Easy-to-control capacitor core impregnation apparatus according to any of claims 1 to 6, characterized in that: the middle upper part of the impregnation tank is also provided with an impregnation tank pressure sensor for detecting the air pressure in the impregnation tank and an impregnation tank temperature sensor for detecting the temperature in the impregnation tank, the middle upper part of the pressure tank is also provided with a pressure sensor of the pressure tank for detecting the air pressure in the pressure tank and a temperature sensor of the pressure tank for detecting the temperature in the pressure tank, the signal output end of the impregnation tank pressure sensor, the signal output end of the impregnation tank temperature sensor, the signal output end of the pressure tank pressure sensor and the signal output end of the pressure tank temperature sensor are respectively and correspondingly connected with the signal input end of the controller, the valve is an electromagnetic valve, and the control input end of the electromagnetic valve, the control input end of the heating and insulating layer of the impregnation tank and the control input end of the heating and insulating layer of the pressurization tank are respectively connected with the control output end of the controller.
CN202120013889.2U 2021-01-05 2021-01-05 Capacitor core impregnating equipment convenient to control Active CN214672227U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202120013889.2U CN214672227U (en) 2021-01-05 2021-01-05 Capacitor core impregnating equipment convenient to control

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202120013889.2U CN214672227U (en) 2021-01-05 2021-01-05 Capacitor core impregnating equipment convenient to control

Publications (1)

Publication Number Publication Date
CN214672227U true CN214672227U (en) 2021-11-09

Family

ID=78507145

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202120013889.2U Active CN214672227U (en) 2021-01-05 2021-01-05 Capacitor core impregnating equipment convenient to control

Country Status (1)

Country Link
CN (1) CN214672227U (en)

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