CN109671567A - Sealing device and sealing method for inner ring of cover plate of high-capacity hollow bolt type aluminum capacitor - Google Patents
Sealing device and sealing method for inner ring of cover plate of high-capacity hollow bolt type aluminum capacitor Download PDFInfo
- Publication number
- CN109671567A CN109671567A CN201910084258.7A CN201910084258A CN109671567A CN 109671567 A CN109671567 A CN 109671567A CN 201910084258 A CN201910084258 A CN 201910084258A CN 109671567 A CN109671567 A CN 109671567A
- Authority
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- China
- Prior art keywords
- sealing
- interior sealing
- double end
- bolt type
- hollow bolt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 141
- 239000003990 capacitor Substances 0.000 title claims abstract description 55
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 49
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000010276 construction Methods 0.000 claims description 37
- 230000000694 effects Effects 0.000 claims description 10
- 238000005538 encapsulation Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000010923 batch production Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 description 6
- 239000004411 aluminium Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- 239000005030 aluminium foil Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/08—Housing; Encapsulation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/13—Energy storage using capacitors
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
Abstract
The invention discloses a sealing device and a sealing method for an inner ring of a high-capacity hollow bolt type aluminum capacitor cover plate, and the sealing device and the sealing method comprise an inner sealing seat, a double-head inner sealing needle structure and an inner sealing shaft, wherein the inner sealing shaft is arranged on the sealing device; the invention adopts a well-designed double-head sealing needle structure, and provides a very accurate cover plate inner ring sealing device and a sealing method thereof without using a bearing. The invention not only solves the problem of inner ring sealing of the large-capacity hollow aluminum capacitor, but also solves the problems that the production is interrupted and the batch production is difficult because the inner ring sealing device fails in the past. Meanwhile, the aluminum capacitor manufactured by the invention has stable electrical performance parameters.
Description
Technical field
The present invention relates to ring seal devices in capacitor area more particularly to large capacity hollow bolt type aluminum capacitor cover board
And encapsulating method.
Background technique
Trend with electronic component production domesticization increases, also higher and higher to the performance requirement of aluminium electrolutic capacitor.Especially
It is high temperature, high voltage, large capacity, the long-life and in terms of requirement it is more urgent.For example, large capacity bolt
Type aluminum capacitor under carrying high temperature (such as 105~125 °C) and high voltage (such as 400V or more) load, in capacitor in
Center portion position will generate a large amount of heat, and internal temperature sharply increases, sometimes far beyond the operating temperature ratings of capacitor.This
The thermal stability of the electrode material for making capacitor internal, electrolyte and electrolytic paper is deteriorated, seriously affect capacitor uses the longevity
Life.In order to improve large capacity, high temperature, the working efficiency of high voltage aluminum capacitor and service life, it is necessary to solve capacitor internal
Heat dissipation problem.Therefore, hollow or obturator aluminium electrolutic capacitor is just born, referring to Chinese patent CN202513038U,
CN207852489U, CN208077805U, CN208077806U, CN205984660U and CN108320915A etc..But at present
The technical difficult points for producing this large capacity hollow bolt type aluminum capacitor are the sealing problem of cover board inner ring.In hollow aluminum
In the seal process of capacitor cover plate, if using the encapsulating method of traditional structure, not only result in sealing discontinuity, because
Action space is limited, and the bearing in former closing device is made to be easy to be damaged, and has an effect on product sealing presentation quality.Meanwhile
Former mouth-sealing method also will cause sealing operation process interruption, seriously affect production efficiency.If hollow capacitor inner ring seals not
It is good, can not only accelerate the volatilization of electrolyte, but also it is serious when will cause capacitor leakage and fail.
Summary of the invention
In order to solve the existing force unbalance of above-mentioned large capacity hollow bolt type aluminum capacitor cover board inner ring sealing, envelope
The technical problems such as mouthful poor appearance, sealing operation are easy to interrupt, production efficiency is low, the present invention are sealed using double end using well-designed
Lancet structure, without using a kind of very accurately ring seal device and its encapsulating method in cover board of bearing.The invention not only solves
The inner ring sealing problem of the hollow aluminum capacitor of large capacity of having determined, and solve in the past because interior ring seal device failure forces production
It interrupts, it is difficult to the problem of batch production.Meanwhile using aluminum capacitor made by the present invention there is sufficiently stable electrical property to join
Number.
To achieve the goals above, the technical solution adopted in the present invention is as follows:
In large capacity hollow bolt type aluminum capacitor cover board in ring seal device, including interior sealing seat, double end seal needle construction with
And interior sealing shaft, the interior sealing shaft are mounted on closing device, the interior sealing seat is mounted on the top of interior sealing shaft, described
Sealing needle construction is fixed on interior sealing seat in double end, under the drive of closing device, is driven and is sealed needle construction in the double end
Rotary squeezing, and then capacitor cover plate inner ring is sealed.
Preferably, the interior sealing seat is made of upper junction plate and lower cover plate, the upper junction plate is fixed in described
Sealing shaft top, the interior sealing needle construction of the double end are mounted between the upper junction plate and the lower cover plate.
Preferably, sealing needle construction includes main part and two sealing needle portions, two sealing needles in the double end
Portion is fixed as one with the main part, and is provided with central channel among the main part.
Preferably, centre bore is arranged in the lower cover plate, screw is arranged in the centre bore, the screw passes through centre bore
And needle construction limit will be sealed in the double end in central channel.
Preferably, the center groove width 4.2mm, deep 1mm, the screw is screw M4.
Preferably, two sealing needle portions are symmetrically arranged at the main part two sides, the sealing needle portion is machined with one
Enclose indent circle.
Preferably, the section of the indent circle is semicircle.
Preferably, the interior sealing seat be equipped with screw hole, by lock screw pass through screw hole by lower cover plate with it is upper
Connecting plate is fixedly connected.
The encapsulating method of ring seal device in large capacity hollow bolt type aluminum capacitor cover board, comprising the following steps:
Step 1: interior sealing seat is mounted on to the top of interior sealing shaft, then is fixed on interior sealing seat for needle construction is sealed in double end
On；
Step 2: interior sealing shaft rotates under the drive of closing device, while sealing needle construction moving in interior sealing shaft in double end
The sealing needle portion of the lower rotation of power effect, the left-right position of the interior sealing needle construction of double end has an effect inwardly simultaneously in rotation, so that
Uniform force when inner ring aluminum hull twists completes inner ring encapsulation.
The beneficial effects of the present invention are:
Using ring seal device and its encapsulating method in large capacity hollow bolt type aluminum capacitor cover board disclosed in this invention, no
It can be only fully solved the technical issues of existing sealing tech is deposited, and do not use bearing in closing device, still be able to
Keep sealing part type position precisely controlled.In sealing process, light free positioning, uniform force when inner ring aluminum hull being made to twist, equipment
Service life extends, to guarantee that seal operation process is not disrupted, substantially increases the sealing precision of hollow aluminum capacitor
With the exterior quality of product.
Detailed description of the invention
Fig. 1 is to seal needle construction operation chart in hollow aluminum capacitor cover plate inner ring sealing double end.
Fig. 2 is to seal needle construction structural schematic diagram in hollow aluminum capacitor cover plate inner ring sealing double end.
Fig. 3 is that hollow aluminum capacitor cover plate inner ring seals interior sealing shaft structural schematic diagram.
Fig. 4 is the sectional view in the face A-A in Fig. 3.
Fig. 5 is the existing sealing schematic diagram of hollow bolt type aluminum electrolytic capacitor cover plate inner ring.
Wherein: cushion rubber in 1-, the outer cushion rubber of 2-, 3- positive terminal, 4- negative terminal, the sealing of 5- inner ring, 6- cover board, the outer glue of 7-
Circle sealing, seals seat in 8-, 81- upper junction plate, 82- lower connecting plate, seals needle construction in 9- double end, 91- indent circle, in 10-
Sealing shaft, 11- lock screw, 12- centre bore, 13- central channel.
Specific embodiment
In order to make those skilled in the art be better understood on technical solution of the present invention, with reference to the accompanying drawing and
Embodiment is further described technical solution of the present invention.
Referring to shown in attached drawing 5, large capacity hollow bolt type aluminum electrolytic capacitor cover plate inner ring sealing according to the present invention
Schematic diagram.Since 6 inner ring of cover board is small, sealing device action space is easy to be obstructed.Traditional sealing method makes inner ring aluminum hull twist
When acted on by biggish lateral pressure, so that band edge bearing in traditional closing device is born very big lateral pressure for a long time, thus pole
Easily cause the damage of band edge bearing.According to statistics, it will be often damaged in 10 or so bearings of processing using traditional sealing method,
Seal operation will be forced to interrupt, and seriously affect production efficiency.
Capacitor generally comprises outer cushion rubber sealing 7, outer cushion rubber 2, cover board 6, interior cushion rubber 1, inner ring sealing 5 and positive terminal
3 and negative terminal 4.
Embodiment:
Referring to shown in attached drawing 1-4, ring seal device in large capacity hollow bolt type aluminum capacitor cover board, including it is interior sealing seat 8, double
Sealing needle construction 9 and interior sealing shaft 10, the interior sealing shaft 10 are mounted on closing device in head, and the interior sealing seat 8 is pacified
Mounted in the top of interior sealing shaft 10, interior sealing shaft 10 is clamped in the shaft of closing device host, and interior envelope is driven in capping processes
Mouth axis uniform rotation, the interior sealing needle construction 9 of the double end is fixed on interior sealing seat 8, under the drive of the closing device, band
Sealing needle construction 9 in the double end is moved to rotate and then be sealed capacitor cover plate inner ring.
Specifically, the interior sealing seat 8 is made of upper junction plate 81 and lower cover plate 82, the upper junction plate 81 is fixed on institute
Interior 10 top of sealing shaft is stated, sealing needle construction is mounted between the upper junction plate 81 and the lower cover plate 82 in the double end,
Sealing needle construction includes main part and two sealing needle portions in the double end, and two sealing needle portions are fixed with the main part
It is integrated, and is provided with central channel 13 among the main part, the lower cover plate 82 is arranged centre bore 12, in the centre bore 12
Be arranged screw, the screw pass through centre bore 12 and will in the double end seal needle construction limit in central channel 13, it is described in
Heart groove width 4.2mm, deep 1mm, the screw is screw M4；The diameter of screw M4 is 4mm, and the width of central channel is 4.2mm, also
To say that the automatic alignment position-limiting action in rotary course may be implemented in sealing needle construction in double end, it is axial can be automatic micro-
It adjusts；
The interior sealing seat 8 is equipped with screw hole, passes through screw hole for lower cover plate 82 and upper junction plate 81 by lock screw 11
It is fixedly connected.
Sealing needle construction 9 is connected on interior sealing seat 8 in double end, is actually above hollow capacitor clamping fixture seat
A piece axis.
Two sealing needle portions are symmetrically arranged at the main part two sides, and the sealing needle portion is machined with a circle indent circle
91, the section of the indent circle is semicircle；The setting of indent circle 91 be in order to more preferably with the aluminum hull in inner ring is seamless contacts, together
When by attached drawing 2 as it can be seen that indent circle 91 and main part junction are also machined with circular arc chamfering face, 92, the processing in circular arc chamfering face 92
So that sealing needle construction preferably compresses limit with inner ring during envelope in rotation in double end, interior seal structure it is high-quality.
Novel hollow capacitor cover plate inner ring closing device of the invention will seal needle construction using double end.This new design
Double end sealing needle device mainly by interior sealing seat 8, sealing needle construction 9 composition in double end.In the sealing operation of cover board inner ring,
Interior sealing seat 8 is first mounted on to the top of interior sealing shaft 10, then double end sealing needle is fixed on interior sealing seat 8, rotates double end
Sealing needle can make inner ring aluminum hull twist to be inserted into interior sealing rubber ring.Since the sealing needle portion of left-right position is inside simultaneously in rotation
Side is had an effect, and the wear intensity of double end sealing part is substantially reduced.Ring seal device is in the feelings for not using bearing in cover board of the invention
Under condition, double end can be made to seal needle stable working in the same old way, it is because double end sealing needle can side generates active force respectively inwards simultaneously, i.e., left
Right pressure at both sides is cancelled out each other, so that uniform force when inner ring aluminum hull twists, the type position and size when product seals are precisely controlled,
It not will cause sealing operation interruption not only, but also make to seal smooth in appearance beauty, product quality greatly improves.
The encapsulating method of ring seal device in large capacity hollow bolt type aluminum capacitor cover board, comprising the following steps:
Step 1: interior sealing seat 8 is mounted on to the top of interior sealing shaft 10, then is fixed on interior envelope for needle construction 9 is sealed in double end
On mouth seat 8；
Step 2: under the power effect of interior sealing shaft 10, needle construction 9 is sealed in rotation double end, sealing needle construction 9 in double end
The sealing needle portion of left-right position has an effect inwardly simultaneously in rotation, so that uniform force when inner ring aluminum hull twists, completes inner ring
Encapsulation, during sealing, interior sealing shaft drives sealing needle construction in double end at the uniform velocity to rotate, a left side for sealing needle construction in double end
The sealing needle portion of right position is pressed against inner ring aluminum hull by semicircular indent circle respectively, during uniform rotation, by aluminium
Shell seals in squeezing, and sealing needle by the double end of semicircular 91 structure of indent circle during this may be implemented preferably to position effect
Fruit.
When preparing 450V5600 μ F large-sized bolt aluminium electrolutic capacitor, first positive and negative electrode aluminium foil and electrolytic paper are cut out
It is cut into designed width, the positive and negative electrode aluminium foil cut and one nail nipping of electrolytic paper are rolled into capacitor body, then passed through
Electrolyte is injected, it is encapsulated using cover board inner ring packaging method of the invention, casing, after the processes such as aging, then this kind is advised
Lattice capacitor carries out electrical property detection, and test parameter is shown in Table 1
1 450V5600 μ F hollow bolt aluminium electrolutic capacitor test parameter of table
Find out from table 1, all electrical parameters comply with standard value.Illustrate, effect of the invention is apparent.
The present invention seals needle construction using well-designed, using double end, without using a kind of very accurately cover board of bearing
Interior ring seal device and its encapsulating method.The invention not only solves the inner ring sealing problem of the hollow aluminum capacitor of large capacity, and
And solve in the past because interior ring seal device failure forces production disruption, it is difficult to the problem of batch production.Meanwhile using the present invention
Made aluminum capacitor has sufficiently stable unit for electrical property parameters.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (9)
1. ring seal device in large capacity hollow bolt type aluminum capacitor cover board, it is characterised in that: including in interior sealing seat, double end
Sealing needle construction and interior sealing shaft, the interior sealing shaft are mounted on closing device, and the interior sealing seat is mounted on interior sealing
The top of axis, the interior sealing needle construction of the double end are fixed on interior sealing seat, under the drive of closing device, drive the double end
Interior sealing needle construction rotary squeezing, and then capacitor cover plate inner ring is sealed.
2. ring seal device in large capacity hollow bolt type aluminum capacitor cover board according to claim 1, it is characterised in that:
The interior sealing seat is made of upper junction plate and lower cover plate, and the upper junction plate is fixed on the interior sealing shaft top, described double
Sealing needle construction is mounted between the upper junction plate and the lower cover plate in head.
3. ring seal device in large capacity hollow bolt type aluminum capacitor cover board according to claim 2, it is characterised in that:
Sealing needle construction includes main part and two sealing needle portions in the double end, and two sealing needle portions are fixed with the main part
It is integrated, and is provided with central channel among the main part.
4. ring seal device in large capacity hollow bolt type aluminum capacitor cover board according to claim 3, it is characterised in that:
Centre bore is arranged in the lower cover plate, and screw is arranged in the centre bore, and the screw passes through centre bore and will seal in the double end
Lancet structure limits in central channel.
5. ring seal device in large capacity hollow bolt type aluminum capacitor cover board according to claim 4, it is characterised in that:
The center groove width 4.2mm, deep 1mm, the screw are screw M4.
6. ring seal device in large capacity hollow bolt type aluminum capacitor cover board according to claim 5, it is characterised in that:
Two sealing needle portions are symmetrically arranged at the main part two sides, and the sealing needle portion is machined with a circle indent circle.
7. ring seal device in large capacity hollow bolt type aluminum capacitor cover board according to claim 6, it is characterised in that:
The section of the indent circle is semicircle.
8. ring seal device in large capacity hollow bolt type aluminum capacitor cover board according to claim 7, it is characterised in that:
The interior sealing seat is equipped with screw hole, passes through screw hole by lock screw and is fixedly connected with lower cover plate with upper junction plate.
9. such as the sealing of ring seal device in the described in any item large capacity hollow bolt type aluminum capacitor cover boards of claim 1-8
Method, which comprises the following steps:
Step 1: interior sealing seat is mounted on to the top of interior sealing shaft, then is fixed on interior sealing seat for needle construction is sealed in double end
On；
Step 2: interior sealing shaft rotates under the drive of closing device, while sealing needle construction moving in interior sealing shaft in double end
The sealing needle portion of the lower rotation of power effect, the left-right position of the interior sealing needle construction of double end has an effect inwardly simultaneously in rotation, so that
Uniform force when inner ring aluminum hull twists completes inner ring encapsulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910084258.7A CN109671567B (en) | 2019-01-29 | 2019-01-29 | Sealing device and sealing method for inner ring of large-capacity hollow bolt type aluminum capacitor cover plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910084258.7A CN109671567B (en) | 2019-01-29 | 2019-01-29 | Sealing device and sealing method for inner ring of large-capacity hollow bolt type aluminum capacitor cover plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109671567A true CN109671567A (en) | 2019-04-23 |
| CN109671567B CN109671567B (en) | 2024-02-06 |
Family
ID=66150011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910084258.7A Active CN109671567B (en) | 2019-01-29 | 2019-01-29 | Sealing device and sealing method for inner ring of large-capacity hollow bolt type aluminum capacitor cover plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109671567B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07211600A (en) * | 1994-01-20 | 1995-08-11 | Matsushita Electric Ind Co Ltd | Opening-sealing apparatus of aluminum electrolytic capacitor |
| CN202093990U (en) * | 2011-05-13 | 2011-12-28 | 湖南耐普恩电能科技有限公司 | Integral packaging structure for super capacitor |
| CN102412064A (en) * | 2010-09-25 | 2012-04-11 | 周旺龙 | Seal terminal cover plate of large-scale aluminum electrolytic capacitor and sealing method |
| CN102522199A (en) * | 2011-12-19 | 2012-06-27 | 上海一点点电子科技有限公司 | Fixing method of bolt-type aluminum electrolytic capacitor core package with good heat dispersion |
| CN108320915A (en) * | 2018-03-05 | 2018-07-24 | 南通海立电子有限公司 | A kind of aluminium electrolutic capacitor and split type core |
| CN209168949U (en) * | 2019-01-29 | 2019-07-26 | 深圳江浩电子有限公司 | High-capacity hollow bolt type aluminum capacitor cover plate inner ring sealing device |
-
2019
- 2019-01-29 CN CN201910084258.7A patent/CN109671567B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07211600A (en) * | 1994-01-20 | 1995-08-11 | Matsushita Electric Ind Co Ltd | Opening-sealing apparatus of aluminum electrolytic capacitor |
| CN102412064A (en) * | 2010-09-25 | 2012-04-11 | 周旺龙 | Seal terminal cover plate of large-scale aluminum electrolytic capacitor and sealing method |
| CN202093990U (en) * | 2011-05-13 | 2011-12-28 | 湖南耐普恩电能科技有限公司 | Integral packaging structure for super capacitor |
| CN102522199A (en) * | 2011-12-19 | 2012-06-27 | 上海一点点电子科技有限公司 | Fixing method of bolt-type aluminum electrolytic capacitor core package with good heat dispersion |
| CN108320915A (en) * | 2018-03-05 | 2018-07-24 | 南通海立电子有限公司 | A kind of aluminium electrolutic capacitor and split type core |
| CN209168949U (en) * | 2019-01-29 | 2019-07-26 | 深圳江浩电子有限公司 | High-capacity hollow bolt type aluminum capacitor cover plate inner ring sealing device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109671567B (en) | 2024-02-06 |
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