CN112403813A - Vacuum glue injection device and method for capacitor - Google Patents
Vacuum glue injection device and method for capacitor Download PDFInfo
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- CN112403813A CN112403813A CN202011329118.0A CN202011329118A CN112403813A CN 112403813 A CN112403813 A CN 112403813A CN 202011329118 A CN202011329118 A CN 202011329118A CN 112403813 A CN112403813 A CN 112403813A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/002—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the work consisting of separate articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
- B05C11/1002—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves
- B05C11/1007—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves responsive to condition of liquid or other fluent material
- B05C11/1013—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves responsive to condition of liquid or other fluent material responsive to flow or pressure of liquid or other fluent material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
- B05C11/1047—Apparatus or installations for supplying liquid or other fluent material comprising a buffer container or an accumulator between the supply source and the applicator
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/11—Vats or other containers for liquids or other fluent materials
Abstract
The invention relates to a vacuum glue injection device of a capacitor, which is improved on the basis of the prior glue injection tank, a vacuum pump, a glue injection pipe and the like, namely, a degassing barrel with an open mouth part and a closed glue supplementing tank are also arranged in the glue injection tank, the glue injection pipe extends into the glue injection tank and then is inserted into the degassing barrel, and the degassing barrel is communicated with a shell of the capacitor through a glue conveying pipe with a glue injection valve; the air pumping pipe between the vacuumizing valve and the air pumping hole is provided with an air inlet and outlet valve, the upper part of the glue supplementing tank is communicated with the air pumping pipe through a connecting pipe, the lower part of the glue supplementing tank is communicated with the capacitor shell through a glue supplementing pipe, the air pumping pipe between the air inlet and outlet valve and the vacuumizing valve is also connected with a high-pressure air source through a pressurizing valve, and the glue injection tank is also provided with an air release port controlled by the air release valve. The invention can effectively eliminate the gaps and air bubbles in the capacitor and obviously improve the glue injection quality of the capacitor, thereby being worthy of popularization and application.
Description
Technical Field
The invention relates to the technical field of a capacitor preparation device and a capacitor preparation method, in particular to a vacuum glue injection device and a glue injection method of a capacitor.
Background
With the rapid development of power technology, dry power capacitors with high capacity and high voltage are more and more widely used, and the requirements for dry power capacitors are also higher and higher. The quality of the potting adhesive of the power capacitor directly affects the performance of the dry power capacitor. Therefore, in the case of potting, it is required that an insulating paste (generally, epoxy resin or polyurethane) for insulation and protection is tightly filled in the case of the capacitor, that is, between the elements of the capacitor and between the insulating member and the case in the case, and is cured after the filling is ensured, and defects such as voids and bubbles are not generated after the curing.
In order to meet the above requirements, a vacuum glue injection device is usually used to realize glue injection operation of the capacitor, for example, chinese patent No. CN103681011B, "a backwater glue capacitor filling and sealing machine", which includes a vacuum tank, a vacuum pump, a glue injection pipe frame, and glue injection pipes mounted on the glue injection frame, where the glue injection pipes penetrate through a vacuum tank cover and extend into the vacuum tank, each glue injection pipe corresponds to a capacitor, and the vacuum pump is connected to the vacuum tank through a vacuum pump hole. When the vacuum filling and sealing device is used, glue is injected into the capacitor through the glue injection pipe, the vacuum tank is vacuumized after the glue injection is completed, and then air bubbles inside the capacitor are pumped out, so that the filling and sealing quality is guaranteed.
Also, chinese patent application publication No. CN110600284A discloses a backup step-by-step glue-pouring device for a capacitor and a glue-pouring method thereof, which comprises installing a core main body in a housing, installing the housing on an ultrasonic vibration platform, then starting a vacuum pump, pumping a chamber to be glue-poured at the bottom of a flow guide mechanism to vacuum, then opening a feeding head, discharging a molten potting material through a material guide channel, allowing the molten potting material to flow downward along the inner wall of the housing into the chamber to be glue-poured, and simultaneously driving the housing to vibrate by the ultrasonic vibration platform until the liquid level reaches an alarm position, and closing the feeding head. Repeating the steps until the glue filling of each interval is finished, and finishing the filling and sealing operation.
In addition, for example, the document with chinese patent No. CN210897002U also discloses an intelligent two-liquid vacuum glue-pouring device.
By adopting the glue injection device and the glue injection method thereof, although the defects of gaps, bubbles and the like after glue injection of the capacitor are avoided to a certain extent, the insulating glue still has bubbles mixed in the vacuum state due to the saturated vapor pressure of the insulating glue and the problems of micro leakage of a delivery pump and the like, and the gaps which have larger flow resistance and are difficult to enter are formed inside the capacitor because elements in the shell of the capacitor are tighter. And the wall thickness of the common capacitor shell is only 1-4mm, so that a larger pressure difference cannot exist between the inside and the outside of the capacitor shell, otherwise, the capacitor shell is easy to absorb flat and bulge, and therefore, the existing vacuum glue injection device and the glue injection method cannot enable the insulation glue to fully enter the gap with larger flow resistance, and further improvement is still needed.
Disclosure of Invention
The first technical problem to be solved by the invention is to provide a vacuum glue injection device of a capacitor, which can effectively eliminate gaps and bubbles in the capacitor, aiming at the prior art.
The second technical problem to be solved by the present invention is to provide a method for vacuum glue injection of a capacitor, which can effectively eliminate voids and bubbles in the capacitor, in view of the prior art.
The technical scheme adopted by the invention for solving the first technical problem is as follows: the utility model provides a vacuum glue injection device of condenser, including can hold the injecting glue jar, the vacuum pump of an at least condenser and carry the injecting glue pipe of insulating glue for the condenser, the vacuum pump pass through the exhaust tube and link to each other with the extraction opening on the injecting glue jar, install into gluey valve on the injecting glue pipe, install evacuation valve, its characterized in that on the exhaust tube: the glue injection tank is internally provided with a degassing barrel with an open opening and a sealed glue supplementing tank, the glue injection pipe extends into the glue injection tank and then is inserted into the degassing barrel, and the degassing barrel is communicated with a glue injection opening at the lower part of the capacitor shell through a glue conveying pipe with a glue injection valve; the vacuum pump is characterized in that an air inlet and outlet valve is installed on an air exhaust pipe between the vacuum pumping valve and the air exhaust port, the upper part of the glue supplementing tank is communicated with the air exhaust pipe between the air inlet and outlet valve and the vacuum pumping valve through a connecting pipe, the lower part of the glue supplementing tank is communicated with the glue supplementing port at the upper part of the capacitor shell through a glue supplementing pipe, the air exhaust pipe between the air inlet and outlet valve and the vacuum pumping valve is connected with a high-pressure air source through a pressurizing valve, and an air release port controlled by the air release valve is further formed in the glue injection tank.
In order to improve the degassing efficiency, the degassing barrel is internally provided with a degassing umbrella group positioned below the insertion end of the glue injection pipe, and the degassing umbrella group at least comprises a vertical column which is vertically arranged in the degassing barrel and a first umbrella cover which is supported at the top end of the vertical column.
In the above aspect, it is further preferable that the degassing umbrella set further includes a second umbrella cover fixed to the pillar below the first umbrella cover and capable of accommodating the insulating glue falling from the first umbrella cover, and the second umbrella cover is provided with glue leaking holes. So that the degassing effect is obviously improved.
In each of the above solutions, preferably, the bottom surface of the glue supplementing tank is higher than the top surface of the capacitor case, so that the insulating glue in the glue supplementing tank can enter the capacitor case more smoothly.
The technical scheme adopted by the invention for solving the second technical problem is as follows: a vacuum glue injection method for a capacitor, which adopts the vacuum glue injection device of claim 1, and is characterized by comprising the following steps:
(1) connecting a capacitor: placing the capacitor in a glue injection tank, wherein the glue conveying pipe and the glue supplementing pipe are respectively connected with a glue injection port and a glue supplementing port on a shell of the capacitor;
(2) vacuumizing the glue injection tank, the degassing barrel, the glue supplementing tank and the capacitor: opening the air inlet and outlet valve and the vacuum pumping valve, starting the vacuum pump, starting to pump the glue injection tank, the degassing barrel, the glue supplementing tank and the capacitor for 30-60 minutes until the vacuum degree in the glue injection tank is within the range of 100-300 Pa;
(3) feeding the rubber into a degassing barrel: opening a glue inlet valve, injecting insulating glue into the degassing barrel through a glue injection pipe, closing the glue inlet valve until the liquid level of the insulating glue in the degassing barrel rises to a set height, simultaneously continuing to work by the vacuum pump, continuing to pump air for 5-10 minutes when the vacuum degree in the glue injection tank is within the range of 100-300 Pa, and then closing an air inlet and outlet valve;
(4) aerify to the injecting glue jar, continue to bleed the condenser: opening a vent valve, putting dry gas with a normal-pressure dew point lower than-23 ℃ into the glue injection tank, and closing the vent valve until the pressure in the glue injection tank is greater than rho gh, wherein h is the height from the bottom surface of the capacitor shell to the 1/2 height of the glue supplement tank;
(5) injecting glue: opening the glue injection valve, pressing the insulating glue in the degassing barrel into the shell of the capacitor and the glue supplementing tank by the dry gas, and closing the glue injection valve and the vacuum pumping valve until the liquid level in the glue supplementing tank reaches at least half of the height of the glue supplementing tank;
(6) glue supplementing: opening a pressure valve and an air inlet and outlet valve, injecting high-pressure gas into a glue supplementing tank and a glue injection tank, keeping the pressure of 0.05-0.6 MPa in the glue injection tank and in a connecting pipe, pushing the insulating glue in the glue supplementing tank by the high-pressure gas to be injected into a shell of a capacitor to fill a large flow resistance space, and closing the pressure valve after the liquid level in the glue supplementing tank stops dropping for 3-5 minutes;
(7) and (3) curing: and after the capacitor is placed in the glue injection tank or outside the glue injection tank for a period of time, curing the insulating glue in the capacitor.
In the scheme, in the glue injection process in the step (5), when the surface of the insulating glue in the degassing barrel is lowered to the set position and the surface of the insulating glue in the glue supplementing tank does not reach the set height, the glue injection valve is closed, the air inlet and outlet valve is opened, and the steps (2), (3), (4) and (5) are repeated.
In the above aspect, preferably, in the step (3), the step of raising the liquid level of the insulating glue in the stripping barrel to a set height is that: 1/3-1/2 of degassing barrel height. The phenomenon that curing is accelerated due to a large amount of glue is avoided, and multiple tests show that the height is favorable for the insulating glue to smoothly fill the gaps in the capacitor.
In order to further prevent the occurrence of bubbles, it is preferable that a degassing umbrella group located below the insertion end of the glue injection pipe is installed in the degassing barrel, the degassing umbrella group at least comprises a vertical column standing in the degassing barrel and a first umbrella cover supported at the top end of the vertical column, and in the step (3), when the insulating glue falls down from the glue injection pipe, the insulating glue firstly drops on the first umbrella cover and then flows into the degassing barrel along the first umbrella cover.
It is still further improved that the degassing umbrella group further comprises a second umbrella cover which is fixed on the stand column below the first umbrella cover and can contain the insulating glue falling from the first umbrella cover, glue leaking holes are formed in the second umbrella cover, the insulating glue flowing from the first umbrella cover is contained in the second umbrella cover, and then the insulating glue flows into the degassing barrel from the glue leaking holes of the second umbrella cover.
More preferably, the aperture ratio of the second umbrella surface is 0.05-0.1.
Compared with the prior art, the invention is additionally provided with the degassing barrel and the glue supplementing tank, before the insulating glue is injected into the capacitor, the insulating glue is degassed in the degassing barrel in advance, then the insulating glue is injected into the capacitor by utilizing the pressure difference (rho gh), after the capacitor is filled with the insulating glue, the redundant glue amount in the glue supplementing tank is utilized, and then high-pressure gas is utilized, so that the insulating glue in the glue supplementing tank can be pressed into the capacitor to fill the large flow resistance gap, and meanwhile, because the high-pressure gas is applied to the inside and the outside of the capacitor, the air pressure inside and outside the capacitor is consistent, and the shell of the capacitor cannot be damaged, therefore, the invention can effectively eliminate the gap and the air bubble in the capacitor, can obviously improve the glue injection quality of the capacitor, and is worthy of popularization and application.
Drawings
Fig. 1 is a schematic view of a glue injection device according to an embodiment of the invention;
figure 2 is a perspective view of the degassing umbrella set of figure 1.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
Fig. 1 and 2 show a preferred embodiment of the glue injection device according to the invention. The vacuum glue injection device of the capacitor comprises a glue injection tank 1, a vacuum pump 2, a degassing barrel 3, a glue supplement tank 4 and a glue injection pipe 51, wherein at least one capacitor 10 can be accommodated in the glue injection tank 1, the volume of the glue injection tank 1 can be specifically set according to production needs, and only one capacitor is shown in the figure for simplicity and convenience in description. The glue injection tank 1 can adopt a conventional vacuum tank structure, namely a tank door 12 sealed with a tank body 11 is configured, the tank body 11 is provided with an extraction opening 13, an air release opening 14 controlled by an air release valve 71 and a corresponding interface for installing the glue injection pipe and a connecting pipe, and a vacuum measuring instrument (not shown in the figure) is installed on the tank body so as to intuitively display the vacuum degree in the glue injection tank 1.
The vacuum pump 2 is connected with the extraction opening 13 on the glue injection tank 1 through the extraction pipe 52, the extraction pipe 52 is provided with an evacuation valve 72 and an air inlet and outlet valve 73, wherein the air inlet and outlet valve 73 is positioned on the extraction pipe between the extraction opening 13 and the evacuation valve. The vacuum pump 2 can be configured as required, and in the embodiment, the vacuum pump 2 adopts a vacuum pump group with a front stage being a rotary vane pump 21 and a main pump being a roots pump 22.
Above-mentioned degasification bucket 3 and mend gluey jar 4 and all place in injecting glue jar 1, degasification bucket 3 wherein designs into the open structure of oral area to smoothly degasification, degasification bucket 3 can be placed on the platform in injecting glue jar 1 with the condenser together.
One end of the glue injection pipe 51 is connected with an insulating glue source through a delivery pump, the other end of the glue injection pipe is inserted into the degassing barrel 3 through a corresponding interface of the glue injection tank 1, and a glue inlet valve 74 is installed on the glue injection pipe 51 positioned outside the glue injection tank 1. The degassing barrel 3 is communicated with a glue injection port 101 at the lower part of the capacitor shell through a glue transmission pipe 53 with a glue injection valve 75. In order to improve the degassing efficiency of the insulating glue in the degassing barrel 3, in the present embodiment, a degassing umbrella set 6 is installed in the degassing barrel 3 under the other end (i.e. the insertion end) of the glue injection pipe 51, the degassing umbrella set 6 at least comprises a vertical post 61 standing in the degassing barrel 3 and a first umbrella cover 62 supported on the top end of the vertical post, in fig. 2, three umbrella covers are used, namely, a first umbrella cover 62, a second umbrella cover 63 and a third umbrella cover 64 are sequentially installed on the vertical post at intervals from top to bottom, the second umbrella cover 63 can contain the insulating glue falling from the first umbrella cover 62, in the second umbrella cover 63, glue leakage holes 631 are opened, the glue leakage holes 631 are provided with a plurality of holes 631, which are sequentially and uniformly distributed on the second umbrella cover 63, preferably, the hole opening ratio of the second umbrella cover 63 is 0.05-0.1, and the hole opening ratio is too small, so that the insulating glue can smoothly and slowly flow through the second umbrella cover 63, otherwise, the insulating glue can be retained on the second umbrella surface 63; if the aperture ratio is too large, the insulating glue can quickly pass through the second umbrella cover 63, and the degassing effect is not obvious. Third umbrella surface 64 is placed in the same manner as first umbrella surface 62, and the insulation paste dropped from glue leakage hole 631 can flow into degassing barrel 3 along third umbrella surface 64.
The glue supplementing tank 4 is arranged to be of a closed structure, and the bottom surface of the installed glue supplementing tank 4 is preferably higher than the top surface of the capacitor shell. The upper part of the glue supplementing tank 4 is connected with one end of a connecting pipe 54 penetrating through the glue injection tank 1, the other end of the connecting pipe 54 is communicated with an air pumping pipe 52 between an air inlet and outlet valve 73 and a vacuum pumping valve 72, the lower part of the glue supplementing tank 4 is communicated with a glue supplementing opening 102 at the upper part of the capacitor shell through a glue supplementing pipe 55, and the air pumping pipe between the air inlet and outlet valve 73 and the vacuum pumping valve 72 is also connected with a high-pressure air source through a pressurizing valve 76.
When the vacuum glue injection device is adopted for glue injection operation, the method specifically comprises the following steps:
(1) connecting a capacitor: opening a tank door of the glue injection tank 1, placing the capacitor 10 in the glue injection tank 1, then respectively connecting the glue conveying pipe 53 and the glue supplementing pipe 55 with a glue injection port 101 and a glue supplementing port 102 on a shell of the capacitor, and then closing the tank door 12;
(2) and (3) vacuumizing the glue injection tank 1, the degassing barrel 3, the glue supplementing tank 4 and the capacitor: opening the air inlet and outlet valve 73 and the vacuum pumping valve 72, starting the vacuum pump 2, starting to simultaneously pump the glue injection tank 1, the degassing barrel 3, the glue supplementing tank 4 and the capacitor 10, and continuing to pump the glue for 30-60 minutes until the vacuum degree in the glue injection tank 1 is within the range of 100-300 Pa, wherein the specific time can be determined according to the requirements of the specification and the like of the capacitor;
(3) and (3) feeding the rubber into a degassing barrel 3: opening a glue inlet valve 74, starting a delivery pump, enabling insulating glue to continuously fall through a glue injection pipe 51, firstly dropping on the first umbrella cover 62, then flowing into the second umbrella cover 63 along the first umbrella cover, storing the insulating glue in the second umbrella cover 63, then flowing into the third umbrella cover 64 from a glue leakage hole 631 of the second umbrella cover, further degassing the insulating glue, flowing into the degassing barrel 3 along the third umbrella cover 64, closing the glue inlet valve until the liquid level of the insulating glue in the degassing barrel 3 is raised to a set height, simultaneously continuing to work by a vacuum pump 2, continuously pumping air for 5-10 minutes when the vacuum degree in the glue injection tank 1 is within the range of 100-300 Pa, and then closing the air inlet and outlet valve 73;
herein, the liquid level of the insulating cement in the degassing barrel 3 rises to the height of setting for and can select the degassing barrel 3 height of 1/3 ~ 1/2, because the curing reaction of insulating cement has begun in the degassing barrel, can produce the heat during the reaction, and the heat can accelerate the curing reaction again, and the volume of glue that consequently holds in the degassing barrel is less relatively, is favorable to preventing the solidification of insulating cement, ensures that the insulating cement in the degassing barrel can be impressed smoothly in the capacitor case.
(4) Aerify to injecting glue jar 1, continue to bleed the condenser: and (3) opening the vent valve 71, and putting dry gas (specifically dry air) with the normal pressure dew point lower than-23 ℃ into the glue injection tank 1, and closing the vent valve 71 until the pressure in the glue injection tank 1 is greater than rho gh, wherein h is the height from the bottom surface of the capacitor shell to the 1/2 height of the glue supplement tank 4.
In the process, because the capacitor 10 is still vacuumized through the glue supplementing tank 4, in order to prevent the capacitor shell from being flat, when the capacitor shell is designed, the height of the capacitor shell is not more than 1/2S multiplied by 103I.e. where S is the wall thickness of the capacitor case in millimeters.
(5) Injecting glue: opening the glue injection valve 75, pressing the insulation glue in the degassing barrel 3 into the shell of the capacitor and the glue supplementing tank 4 by the dry gas, namely, at the moment, utilizing the pressure difference to enable the insulation glue to smoothly flow into the capacitor until the liquid level in the glue supplementing tank 4 reaches at least half of the height of the glue supplementing tank 4, in the embodiment, closing the glue injection valve 75 and the vacuum pumping valve 72 when the liquid level reaches 2/3 height of the glue supplementing tank 4;
(6) glue supplementing: and (3) opening the pressurizing valve 76 and the air inlet and outlet valve 73, and injecting high-pressure gas (specifically, compressed air) into the glue supplementing tank 4 and the glue injection tank 1 to keep the pressure in the glue injection tank 1 and the connecting pipe 54 at 0.05-0.6 MPa, wherein the specific pressure can be determined according to the tightness of elements in the product, if the specific pressure is tighter, the specific pressure is greater, and otherwise, the specific pressure is lower. The insulating glue in the glue supplementing tank 4 is pushed by high-pressure gas to be injected into the shell of the capacitor so as to fill the large flow resistance space in the capacitor, and the pressurizing valve 76 is closed after the liquid level in the glue supplementing tank 4 stops dropping for 3-5 minutes;
in the process, because the same pressure is born inside and outside the capacitor shell, the phenomenon that the capacitor shell is damaged can not occur, and the pressure difference is formed between the liquid level of the glue supplementing tank 4 and the large flow resistance gap in the capacitor, so the insulating glue in the glue supplementing tank 4 can be smoothly supplemented into the capacitor.
(7) And (3) curing: the capacitor 10 can be placed in the glue injection tank 1 for a period of time to cure the insulating glue, and the tank door 12 can also be opened to cure the insulating glue in the capacitor after the capacitor is placed outside the glue injection tank 1 for a period of time.
In the above glue injection process, if the amount of the insulating glue in the degassing barrel 3 can satisfy the amount of the insulating glue required in the capacitor and the glue supplementing amount in the glue supplementing tank 4, the insulating glue in the degassing barrel 3 can be injected into the capacitor at one time, so that the glue injection efficiency can be improved, and the curing of the insulating glue in the glue injection process can be avoided. However, when the capacitor capacity is large, the glue amount in the degassing barrel 3 cannot satisfy the glue amount in the capacitor, that is, in the glue injection process in the step (5), when the insulating glue solution level in the degassing barrel 3 drops to a set position (not lower than the output port of the degassing barrel 3 connected with the glue delivery pipe 53, otherwise, the gas enters the capacitor to affect the quality of the capacitor) and the insulating glue solution level in the glue supplement tank 4 does not reach a set height, the glue injection valve 75 needs to be closed at this time, and the steps (2), (3), (4) and (5) are repeated. Namely, after the step (5), opening the air inlet and outlet valve a again, performing air extraction on the glue injection tank 1 and the degassing barrel 3 in the step (2) (until the glue supplement tank 4 is always subjected to air extraction at this time), continuing to perform air extraction for 30-60 minutes until the vacuum degree in the glue injection tank 1 is within the range of 100-300 Pa, then performing the step (3), performing glue injection to the degassing barrel 3 again, inflating to the glue injection tank 1, and then repeating the steps (4) and (5) in such a way until the liquid level in the glue supplement tank 4 reaches at least half of the height of the glue supplement tank 4, and closing the glue injection valve and the vacuum extraction valve; and (5) performing glue filling operation in the step (6).
In the glue injection operation, the insulation glue is degassed before being injected into the capacitor, the insulation glue is injected into the capacitor by using pressure difference, and then the insulation glue is pressed into the capacitor by using the redundant glue amount in the glue supplementing tank 4. And the glue injection process can be controlled by the controller in the whole process, and the operation is also convenient.
Claims (10)
1. The utility model provides a vacuum glue injection device of condenser, including injecting glue jar (1), vacuum pump (2) that can hold at least one condenser (10) and injecting glue pipe (51) for the condenser transport insulating cement, vacuum pump (2) link to each other through extraction opening (13) on aspiration tube (52) and the injecting glue jar, install into gluey valve (74) on injecting glue pipe (51), install evacuation valve (72) on aspiration tube (52), its characterized in that: the glue injection tank (1) is also internally provided with a degassing barrel (3) with an open opening and a sealed glue supplementing tank (4), the glue injection pipe (51) extends into the glue injection tank (1) and then is inserted into the degassing barrel (3), and the degassing barrel (3) is communicated with a glue injection opening (101) at the lower part of the capacitor shell through a glue conveying pipe (53) with a glue injection valve (75); an air inlet and outlet valve (73) is installed on the air pumping pipe (52) between the vacuum pumping valve (72) and the air pumping port, the upper part of the glue supplementing tank (4) is communicated with the air pumping pipe (52) between the air inlet and outlet valve (73) and the vacuum pumping valve (72) through a connecting pipe (54), the lower part of the glue supplementing tank (4) is communicated with the glue supplementing port (102) at the upper part of the capacitor shell through a glue supplementing pipe (55), the air pumping pipe (52) between the air inlet and outlet valve (73) and the vacuum pumping valve (72) is also connected with a high-pressure air source through a pressurizing valve (76), and meanwhile, an air release port (14) controlled by a release valve (71) is further formed in the glue injection tank (1).
2. The vacuum glue injection apparatus according to claim 1, wherein: the degassing umbrella group (6) positioned below the insertion end of the glue injection pipe (51) is installed in the degassing barrel (3), and the degassing umbrella group at least comprises a vertical column (61) which is vertically arranged in the degassing barrel (3) and a first umbrella cover (62) supported at the top end of the vertical column.
3. The vacuum glue-injection device according to claim 2, characterized in that: the degassing umbrella group (6) also comprises a second umbrella cover (63) which is fixed on the upright post positioned below the first umbrella cover (62) and can contain insulating glue falling from the first umbrella cover, and glue leakage holes (631) are formed in the second umbrella cover (63).
4. The vacuum glue-injection apparatus according to claim 1, 2 or 3, characterized in that: the bottom surface of the glue supplementing tank (4) is higher than the top surface of the capacitor shell.
5. A vacuum glue injection method for a capacitor, which adopts the vacuum glue injection device of claim 1, and is characterized by comprising the following steps:
(1) connecting a capacitor: the capacitor is placed in a glue injection tank (1), and the glue conveying pipe (53) and the glue supplementing pipe (55) are respectively connected with a glue injection port (101) and a glue supplementing port (102) on the shell of the capacitor;
(2) vacuumizing the glue injection tank, the degassing barrel, the glue supplementing tank and the capacitor: opening the air inlet and outlet valve (73) and the vacuum pumping valve (72), starting the vacuum pump (2), starting to pump the glue injection tank, the degassing barrel (3), the glue supplementing tank (4) and the capacitor (10) for 30-60 minutes until the vacuum degree in the glue injection tank is within the range of 100-300 Pa;
(3) feeding the rubber into a degassing barrel: opening a glue inlet valve (74), injecting insulating glue into the degassing barrel (3) through a glue injection pipe (51), closing the glue inlet valve (74) until the liquid level of the insulating glue in the degassing barrel (3) rises to a set height, simultaneously continuing to work by the vacuum pump (2), continuing to pump air for 5-10 minutes when the vacuum degree in the glue injection tank is within the range of 100-300 Pa, and then closing a gas inlet and outlet valve (73);
(4) aerify to the injecting glue jar, continue to bleed the condenser: opening a release valve (71), putting dry gas with a normal-pressure dew point lower than-23 ℃ into the glue injection tank, and closing the release valve (71) until the pressure in the glue injection tank is greater than rho gh, wherein h is the height from the bottom surface of the capacitor shell to 1/2 of the glue supplement tank (4);
(5) injecting glue: opening the glue injection valve (75), pressing the insulating glue in the degassing barrel (3) into the shell of the capacitor and the glue supplementing tank (4) by the dry gas, and closing the glue injection valve (75) and the vacuum pumping valve (72) until the liquid level in the glue supplementing tank (4) reaches at least half of the height of the glue supplementing tank (4);
(6) glue supplementing: opening a pressurizing valve (76) and an air inlet and outlet valve (73), injecting high-pressure gas into a glue supplementing tank (4) and a glue injection tank, keeping the pressure of 0.05-0.6 MPa in the glue injection tank and in a connecting pipe (54), pushing insulating glue in the glue supplementing tank (4) by the high-pressure gas to be injected into a shell of the capacitor so as to fill a large flow resistance space, and closing the pressurizing valve (76) after the liquid level in the glue supplementing tank (4) stops dropping for 3-5 minutes;
(7) and (3) curing: and after the capacitor is placed in the glue injection tank or outside the glue injection tank for a period of time, curing the insulating glue in the capacitor.
6. The vacuum glue injection method according to claim 5, characterized in that: in the glue injection process of the step (5), when the surface of the insulating glue in the degassing barrel (3) drops to a set position and the surface of the insulating glue in the glue supplementing tank (4) does not reach a set height, the glue injection valve (75) is closed, the air inlet and outlet valve (73) is opened, and the steps (2), (3), (4) and (5) are repeated.
7. The vacuum glue injection method according to claim 5, characterized in that: in the step (3), the liquid level of the insulating glue in the stripping barrel rises to a set height: 1/3-1/2 of degassing barrel (3).
8. The vacuum glue injection method according to claim 5, characterized in that: the degassing umbrella group (6) positioned below the insertion end of the rubber injection pipe (51) is installed in the degassing barrel (3), the degassing umbrella group at least comprises a vertical column (61) which is vertically arranged in the degassing barrel (3) and a first umbrella cover (62) supported at the top end of the vertical column, in the step (3), when the insulating rubber falls down from the rubber injection pipe (51), the insulating rubber firstly drops on the first umbrella cover (62), and then flows into the degassing barrel (3) along the first umbrella cover.
9. The vacuum glue injection method according to claim 8, characterized in that: degassing umbrella organizes still including fixing on the stand that is located first umbrella face below and can hold second umbrella face (63) from the insulating cement that falls on first umbrella face, it has hourglass gluey hole (631) to open on this second umbrella face, follows the insulating cement that first umbrella face flowed down is accomodate in this second umbrella face (63), then flows into degassing barrel (3) in leaking gluey hole (631) of second umbrella face again.
10. The vacuum glue injection method according to claim 9, characterized in that: the opening rate of the second umbrella surface (63) is 0.05-0.1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011329118.0A CN112403813A (en) | 2020-11-24 | 2020-11-24 | Vacuum glue injection device and method for capacitor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011329118.0A CN112403813A (en) | 2020-11-24 | 2020-11-24 | Vacuum glue injection device and method for capacitor |
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| CN112403813A true CN112403813A (en) | 2021-02-26 |
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| CN202011329118.0A Pending CN112403813A (en) | 2020-11-24 | 2020-11-24 | Vacuum glue injection device and method for capacitor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114420473A (en) * | 2022-01-29 | 2022-04-29 | 常熟市国瑞科技股份有限公司 | Packaging device for shell-less capacitor |
| CN115394573A (en) * | 2022-08-25 | 2022-11-25 | 成都宏明电子股份有限公司 | Perfusion method and perfusion tool for high-power high-energy-storage-density capacitor |
-
2020
- 2020-11-24 CN CN202011329118.0A patent/CN112403813A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114420473A (en) * | 2022-01-29 | 2022-04-29 | 常熟市国瑞科技股份有限公司 | Packaging device for shell-less capacitor |
| CN115394573A (en) * | 2022-08-25 | 2022-11-25 | 成都宏明电子股份有限公司 | Perfusion method and perfusion tool for high-power high-energy-storage-density capacitor |
| CN115394573B (en) * | 2022-08-25 | 2023-09-15 | 成都宏明电子股份有限公司 | Filling method and filling tool for high-power high-energy-storage-density capacitor |
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