CN113363077A - Large-scale safe explosion-proof aluminum electrolytic capacitor - Google Patents
Large-scale safe explosion-proof aluminum electrolytic capacitor Download PDFInfo
- Publication number
- CN113363077A CN113363077A CN202110912862.1A CN202110912862A CN113363077A CN 113363077 A CN113363077 A CN 113363077A CN 202110912862 A CN202110912862 A CN 202110912862A CN 113363077 A CN113363077 A CN 113363077A
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- explosion
- proof
- spiral pipeline
- groove
- sealing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-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
- H01G9/12—Vents or other means allowing expansion
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G2/00—Details of capacitors not covered by a single one of groups H01G4/00-H01G11/00
- H01G2/14—Protection against electric or thermal overload
- H01G2/18—Protection against electric or thermal overload with breakable contacts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-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
- H01G9/10—Sealing, e.g. of lead-in wires
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/145—Liquid electrolytic capacitors
Abstract
The invention discloses a large-scale safe explosion-proof aluminum electrolytic capacitor, which comprises an aluminum shell, and a sealing rubber layer, a core and an electrode which are arranged in the aluminum shell, wherein a lead is welded on the electrode, an explosion-proof groove is formed in the bottom in the aluminum shell, a pressure relief device for relieving the explosion pressure of the capacitor is arranged in the explosion-proof groove, and the pressure relief device comprises a spiral pipeline, a return pipe, a sealing plug, a buffer spring and a flow guide mechanism; the flow guide mechanism is used for communicating the spiral pipeline with the explosion-proof groove and comprises a sealing baffle plate, a piston, a threaded sleeve, a screw rod and a supporting spring. The invention can greatly reduce the impact force of the high-pressure airflow inside the capacitor during explosion by arranging the pressure relief device, thereby preventing explosion, and meanwhile, the spiral pipeline and the backflow pipe are arranged, so that the high-pressure airflow containing electrolyte can flow into the recovery tank through the backflow pipe under the action of centrifugal force and gravity when flowing along the spiral pipeline, thereby effectively preventing the electrolyte from flying out and avoiding generating more harm.
Description
Technical Field
The invention relates to the technical field related to capacitors, in particular to a large-scale safe explosion-proof aluminum electrolytic capacitor.
Background
In a circuit component, a capacitor is quite common, but in the using process, the capacitor is often exploded due to the conditions of short circuit, overload and the like.
In order to reduce the damage caused by capacitor explosion, the safety capacitor provided by the application number of 201510477967.3 ensures that the axial stress of the capacitor is balanced and the displacement is avoided to avoid the firing danger by arranging the bottom surface of the shell with lower strength. However, for some large-volume aluminum electrolytic capacitors, even if the capacitor does not displace due to the large volume, a large amount of electrolyte inside the capacitor is discharged outwards along with high-pressure air inside the capacitor during bursting and is easy to flow to other circuit structures, and the electrolyte has conductivity, so that secondary short circuit is easily caused to cause large-area circuit burnout. In view of this, the present application provides a large-scale safe explosion-proof aluminum electrolytic capacitor.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a large safe explosion-proof aluminum electrolytic capacitor.
In order to achieve the purpose, the invention adopts the following technical scheme:
a large-scale safe explosion-proof aluminum electrolytic capacitor comprises an aluminum shell, and a sealing rubber layer, a core and an electrode which are arranged in the aluminum shell, wherein a lead is welded on the electrode, an explosion-proof groove is formed in the bottom in the aluminum shell, a pressure relief device for relieving the explosion pressure of the capacitor is arranged in the explosion-proof groove, and the pressure relief device comprises a spiral pipeline, a return pipe, a sealing plug, a buffer spring and a flow guide mechanism;
the flow guide mechanism is used for communicating the spiral pipeline with the explosion-proof groove and comprises a sealing baffle plate, a piston, a threaded sleeve, a screw rod and a supporting spring.
Preferably, the side wall of the aluminum shell is provided with a plurality of energy releasing grooves, the inner wall of each energy releasing groove is provided with an exhaust hole, the sealing plug is connected in the energy releasing grooves in a sealing and sliding manner, two ends of the buffer spring are fixedly connected with the sealing plug and the top of the energy releasing groove respectively, the side wall of the aluminum shell is provided with a diversion groove, the spiral pipeline and the return pipe are both arranged in the diversion groove, the spiral pipeline is communicated with the explosion-proof groove and the energy releasing grooves, the inner bottom of the aluminum shell is provided with a recovery groove, and the return pipe is communicated with the recovery groove and the spiral pipeline.
Preferably, the piston is connected in the explosion-proof groove in a sealing and sliding manner, two ends of the supporting spring are respectively fixedly connected with the piston and the bottom in the explosion-proof groove, the threaded sleeve is fixedly connected with the piston, the screw rod is fixedly arranged at the bottom in the explosion-proof groove and is in threaded connection with the threaded sleeve, and the sealing baffle is fixedly arranged on the piston and tightly attached to the inner wall of the explosion-proof groove.
Preferably, the return pipe is provided with a plurality of shunt pipes communicated with the return pipe, each shunt pipe is communicated with the spiral pipeline, and each shunt pipe is respectively arranged on the circumferential side wall of the spiral pipeline.
Preferably, the upper end of the sealing plug is fixedly connected with a push rod, and the push rod is fixedly connected with the lead.
Preferably, a plurality of through holes are formed in the inner bottom of the explosion-proof groove, and the through holes are symmetrically formed along the axis of the explosion-proof groove.
The invention has the following beneficial effects:
1. the pressure relief device is arranged, so that the impact force of high-pressure airflow inside the capacitor during explosion can be greatly relieved, the explosion can be prevented, and meanwhile, the spiral pipeline and the backflow pipe are arranged, so that the high-pressure airflow containing electrolyte can flow into the recovery tank through the backflow pipe under the action of centrifugal force and gravity when flowing along the spiral pipeline, the electrolyte can be effectively prevented from flying out, and the generation of greater harm is avoided;
2. by arranging the flow guide mechanism, on one hand, the buffer spring can be stretched and contracted for multiple times through intermittent communication of each spiral pipeline with the explosion-proof tank, so that a large amount of explosion energy can be buffered as much as possible, and on the other hand, the pressure and the speed of the air flow discharged every time can be limited, so that the flow speed of the electrolyte is delayed, the final kinetic energy of the electrolyte is smaller than the potential energy of the electrolyte, and the electrolyte can flow into the recovery tank along the return pipe;
3. through setting up push rod and water conservancy diversion mechanism, accessible buffer spring is flexible many times and is driven sealing plug and push rod and reciprocate many times, can break off lead wire and electrode to break off the circuit, avoid causing bigger harm.
Drawings
FIG. 1 is a schematic structural diagram of a large-scale safe explosion-proof aluminum electrolytic capacitor according to the present invention;
FIG. 2 is a schematic view of the internal structure of a flow guiding mechanism of a large-scale safe explosion-proof aluminum electrolytic capacitor according to the present invention;
FIG. 3 is an enlarged view of the structure at A in FIG. 1;
fig. 4 is a schematic structural diagram of a spiral pipeline and a return pipe in a large-scale safe explosion-proof aluminum electrolytic capacitor provided by the invention.
In the figure: 1 aluminum shell, 2 sealing rubber layers, 3 cores, 4 electrodes, 5 leads, 6 explosion-proof grooves, 7 pistons, 8 thread sleeves, 9 screw rods, 10 through holes, 11 supporting springs, 12 sealing baffles, 13 sealing plugs, 14 exhaust holes, 15 buffer springs, 16 push rods, 17 recovery grooves, 18 diversion grooves, 19 spiral pipelines, 20 return pipes and 21 energy release grooves.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1-4, a large-scale safe explosion-proof aluminum electrolytic capacitor comprises an aluminum shell 1, and a sealing rubber layer 2, a core 3 and an electrode 4 which are arranged in the aluminum shell 1, wherein a lead 5 is welded on the electrode 4, specifically, the lead 5 is arranged on the electrode 4 through tin soldering and is electrically connected with the electrode 4, an explosion-proof groove 6 is arranged at the bottom in the aluminum shell 1, a pressure relief device for relieving the explosion pressure of the capacitor is arranged in the explosion-proof groove 6, and the pressure relief device comprises a spiral pipeline 19, a backflow pipe 20, a sealing plug 13, a buffer spring 15 and a flow guide mechanism; the side wall of the aluminum shell 1 is provided with a plurality of energy release grooves 21, the inner wall of the energy release grooves 21 is provided with an exhaust hole 14, and the sealing plug 13 is connected in the energy release grooves 21 in a sealing and sliding manner.
The two ends of the buffer spring 15 are fixedly connected with the top in the sealing plug 13 and the energy releasing groove 21 respectively, the side wall of the aluminum shell 1 is provided with a flow guide groove 18, the spiral pipeline 19 and the return pipe 20 are arranged in the flow guide groove 18, the spiral pipeline 19 is communicated with the explosion-proof groove 6 and the energy releasing groove 21, the inner bottom of the aluminum shell 1 is provided with a recovery groove 17, it needs to be explained that the recovery groove 17 is closed, and the sealing plug 13 can elastically move up and down, therefore, when danger occurs, high-pressure air in the capacitor can upwards flow into the energy releasing groove 21 along the spiral pipeline 19, the sealing plug 13 is pushed to move up and move until the sealing plug moves to the upper part of the exhaust hole 14, and the high-pressure air can be exhausted from the exhaust hole 14.
The return pipe 20 is communicated with the recovery tank 17 and the spiral pipeline 19, the return pipe 20 is provided with a plurality of shunt pipes communicated with the return pipe, each shunt pipe is communicated with the spiral pipeline 19, and each shunt pipe is respectively arranged on the circumferential side wall of the spiral pipeline 19.
The flow guide mechanism is used for communicating the spiral pipeline 19 with the explosion-proof groove 6 and comprises a sealing baffle plate 12, a piston 7, a threaded sleeve 8, a screw rod 9 and a supporting spring 11. A plurality of through holes 10 are formed in the inner bottom of the explosion-proof groove 6, and the through holes 10 are symmetrically arranged along the axis of the explosion-proof groove 6. Through the arrangement of the through hole 10, the lower part of the piston 7 can be communicated with the outside, and the piston 7 can move downwards smoothly when an accident occurs. It is worth mentioning that the spiral pipelines 19 are periodically communicated with the explosion-proof groove 6 by arranging the flow guide mechanism, so that the sealing plug 13 can be caused to move up and down for many times, and the push rod 16 can be driven to move synchronously for many times, and the push rod 16 which moves up and down for many times can forcefully and effectively pull off and pull out the lead 5 which is soldered on the electrode 4 due to weak soldering strength, thereby quickly and effectively disconnecting the circuit and preventing larger dangerous accidents from happening.
Piston 7 sealing sliding connection is in explosion-proof groove 6, and supporting spring 11's both ends respectively with piston 7 and explosion-proof groove 6 bottom fixed link to each other, thread bush 8 and piston 7 fixed connection, screw rod 9 fixed set up in explosion-proof groove 6 bottom and with thread bush 8 threaded connection, and sealing baffle 12 is fixed to be set up on piston 7 and closely laminates on explosion-proof groove 6 inner wall.
When the device is used, when the internal pressure of the capacitor is increased rapidly due to short circuit, overload and the like, the pressure acts on the piston 7 which can move elastically firstly, the piston 7 and the threaded sleeve 8 are pushed to move downwards, and the piston 7 rotates while moving downwards under the action of the screw transmission of the screw 9 and the threaded sleeve 8. With the continuous rotation of the piston 7, the sealing baffle 12 on the piston 7 also synchronously rotates, and sequentially blocks the air inlet of each spiral pipeline 19, so that each spiral pipeline 19 is periodically communicated with the explosion-proof groove 6.
When a certain spiral pipeline 19 is communicated with the explosion-proof groove 6, high-pressure air containing electrolyte in the capacitor flows into the energy release groove 21 through the spiral pipeline 19, the sealing plug 13 is pushed to move upwards until the sealing plug 13 moves to the upper part of the exhaust hole 14, the buffer spring 15 can be contracted when the sealing plug 13 moves upwards, and when the high-pressure air containing electrolyte flows along the spiral pipeline 19, the high-pressure air continuously rotates around the vertical axis of the spiral pipeline 19, so that a centrifugal force can be generated, the mass of the electrolyte is far greater than that of the air, the high-pressure air flows along the inner wall of the spiral pipeline 19, is thrown into the return pipe 20 from the shunt pipes at the circumferential side walls of the spiral pipeline 19, and finally flows into the recovery groove 17 along the return pipe 20 under the action of gravity to be stored.
And the high-pressure air pushes the sealing plug 13 to move to the upper part of the exhaust hole 14, and then can be directly exhausted from the exhaust hole 14, thereby preventing the capacitor from exploding. In addition, because each spiral pipeline 19 is periodically communicated with the explosion-proof groove 6, when the communicated spiral pipeline 19 is not communicated with the explosion-proof groove 6 (namely, the sealing baffle 12 blocks the air inlet of the spiral pipeline 19 at the moment), the buffer spring 15 in the corresponding energy release groove 21 is extended and recovered, and pushes the sealing plug 13 to move downwards below the exhaust hole 14, when the spiral pipeline 19 is communicated with the explosion-proof groove 6 again next time, the sealing plug 13 can be pushed to move upwards, and high-pressure air can be exhausted through the exhaust hole 14.
Therefore, when the device releases high-pressure air in the capacitor, the buffer springs 15 in the energy release grooves 21 can stretch and contract for multiple times, and by arranging the plurality of buffer springs 15 and stretching the buffer springs for multiple times, on one hand, the plurality of buffer springs 15 can buffer a large amount of explosion energy when stretching and contracting for multiple times, so that explosion is prevented; on the other hand, the high-pressure air needs to overcome the elasticity of the buffer spring 15 when needing to be discharged every time, so that the flow velocity of the high-pressure air and the electrolyte carried by the high-pressure air can be reduced, the kinetic energy of the electrolyte is reduced, the electrolyte is difficult to vertically flow upwards into the energy release groove 21 through the spiral pipeline 19, and the electrolyte can only flow into the recovery groove 17 by means of self weight after being thrown into the return pipe 20 in the spiral pipeline 19.
Furthermore, when the sealing plug 13 moves up and down for a plurality of times under the action of the buffer spring 15, the push rod 16 is driven to synchronously move up and down, so that the lead 5 soldered on the electrode 4 can be quickly pulled out to break the circuit when danger occurs, and a larger dangerous accident is prevented.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. A large-scale safe explosion-proof aluminum electrolytic capacitor comprises an aluminum shell (1), and a sealing rubber layer (2), a core (3) and an electrode (4) which are arranged in the aluminum shell (1), and is characterized in that a lead (5) is welded on the electrode (4), an explosion-proof groove (6) is formed in the bottom of the aluminum shell (1), a pressure relief device for relieving the explosion pressure of the capacitor is installed in the explosion-proof groove (6), and the pressure relief device comprises a spiral pipeline (19), a return pipe (20), a sealing plug (13), a buffer spring (15) and a flow guide mechanism;
the flow guide mechanism is used for communicating the spiral pipeline (19) with the explosion-proof groove (6), and comprises a sealing baffle plate (12), a piston (7), a thread sleeve (8), a screw rod (9) and a supporting spring (11).
2. The large-scale safe explosion-proof aluminum electrolytic capacitor according to claim 1, a plurality of energy releasing grooves (21) are arranged on the side wall of the aluminum shell (1), the inner wall of each energy releasing groove (21) is provided with an exhaust hole (14), the sealing plug (13) is connected in the energy releasing groove (21) in a sealing and sliding way, two ends of the buffer spring (15) are respectively fixedly connected with the sealing plug (13) and the top in the energy releasing groove (21), a diversion trench (18) is arranged on the side wall of the aluminum shell (1), the spiral pipeline (19) and the return pipe (20) are both arranged in the diversion trench (18), the spiral pipeline (19) is communicated with the explosion-proof groove (6) and the energy release groove (21), a recovery tank (17) is arranged at the inner bottom of the aluminum shell (1), and the return pipe (20) is communicated with the recovery tank (17) and the spiral pipeline (19).
3. The large-scale safe explosion-proof aluminum electrolytic capacitor according to claim 1, wherein the piston (7) is connected in the explosion-proof tank (6) in a sealing and sliding manner, two ends of the supporting spring (11) are respectively fixedly connected with the piston (7) and the inner bottom of the explosion-proof tank (6), the threaded sleeve (8) is fixedly connected with the piston (7), the screw rod (9) is fixedly arranged at the inner bottom of the explosion-proof tank (6) and is in threaded connection with the threaded sleeve (8), and the sealing baffle plate (12) is fixedly arranged on the piston (7) and is tightly attached to the inner wall of the explosion-proof tank (6).
4. The large-scale safe explosion-proof aluminum electrolytic capacitor as claimed in claim 2, wherein the return pipe (20) is provided with a plurality of shunt pipes communicated with the return pipe, each shunt pipe is communicated with the spiral pipeline (19), and each shunt pipe is respectively arranged on the circumferential side wall of the spiral pipeline (19).
5. The large-scale safe explosion-proof aluminum electrolytic capacitor as claimed in claim 1, wherein the upper end of the sealing plug (13) is fixedly connected with a push rod (16), and the push rod (16) is fixedly connected with the lead (5).
6. The large-scale safe explosion-proof aluminum electrolytic capacitor as recited in claim 1, wherein a plurality of through holes (10) are opened at the inner bottom of the explosion-proof tank (6), and the plurality of through holes (10) are symmetrically arranged along the axis of the explosion-proof tank (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110912862.1A CN113363077B (en) | 2021-08-10 | 2021-08-10 | Large-scale safe explosion-proof aluminum electrolytic capacitor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110912862.1A CN113363077B (en) | 2021-08-10 | 2021-08-10 | Large-scale safe explosion-proof aluminum electrolytic capacitor |
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| Publication Number | Publication Date |
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| CN113363077A true CN113363077A (en) | 2021-09-07 |
| CN113363077B CN113363077B (en) | 2021-10-08 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115149163A (en) * | 2022-08-17 | 2022-10-04 | 傅美燕 | Safety type self-pressure-relief explosion-proof storage battery |
| US20230154688A1 (en) * | 2021-11-17 | 2023-05-18 | Vishay Israel Ltd. | Hermetically sealed high energy electrolytic capacitor and capacitor assemblies with improved shock and vibration performance |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205920879U (en) * | 2016-07-30 | 2017-02-01 | 江苏泗阳欣宏电子科技有限公司 | Explosion -proof type aluminium electrolytic capacitor structure |
| CN210668111U (en) * | 2019-11-20 | 2020-06-02 | 常州华威电子有限公司 | Flame-retardant aluminum electrolytic capacitor with diversion bracket structure |
| CN212810080U (en) * | 2020-09-02 | 2021-03-26 | 广州金立电子有限公司 | Aluminum electrolytic capacitor with directional explosion-proof device |
-
2021
- 2021-08-10 CN CN202110912862.1A patent/CN113363077B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205920879U (en) * | 2016-07-30 | 2017-02-01 | 江苏泗阳欣宏电子科技有限公司 | Explosion -proof type aluminium electrolytic capacitor structure |
| CN210668111U (en) * | 2019-11-20 | 2020-06-02 | 常州华威电子有限公司 | Flame-retardant aluminum electrolytic capacitor with diversion bracket structure |
| CN212810080U (en) * | 2020-09-02 | 2021-03-26 | 广州金立电子有限公司 | Aluminum electrolytic capacitor with directional explosion-proof device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230154688A1 (en) * | 2021-11-17 | 2023-05-18 | Vishay Israel Ltd. | Hermetically sealed high energy electrolytic capacitor and capacitor assemblies with improved shock and vibration performance |
| US11742149B2 (en) * | 2021-11-17 | 2023-08-29 | Vishay Israel Ltd. | Hermetically sealed high energy electrolytic capacitor and capacitor assemblies with improved shock and vibration performance |
| CN115149163A (en) * | 2022-08-17 | 2022-10-04 | 傅美燕 | Safety type self-pressure-relief explosion-proof storage battery |
| CN115149163B (en) * | 2022-08-17 | 2023-08-15 | 新疆美特智能安全工程股份有限公司 | Safe type is from explosion-proof battery of pressure release |
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| CN113363077B (en) | 2021-10-08 |
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