CN213691775U - Overpressure explosion-proof protective capacitor - Google Patents
Overpressure explosion-proof protective capacitor Download PDFInfo
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- CN213691775U CN213691775U CN202022481304.8U CN202022481304U CN213691775U CN 213691775 U CN213691775 U CN 213691775U CN 202022481304 U CN202022481304 U CN 202022481304U CN 213691775 U CN213691775 U CN 213691775U
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- insulation board
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Abstract
The utility model provides an overpressure explosion-proof protective capacitor, includes casing and explosion-proof equipment, explosion-proof equipment is including setting up the insulation board in the casing be provided with the rupture disc on the insulation board be equipped with a plurality of relative connecting pieces in the casing to form the clearance between every connecting piece and shells inner wall, be equipped with the mounting that can insert in the clearance in one side that the insulation board is close to the casing be equipped with the limit structure who mutually supports between mounting and the connecting piece, make the insulation board fixed on the casing. The utility model discloses an overpressure explosion-proof protective capacitor, explosion-proof equipment only need make limit structure assemble in place in the assembling process, and not only the assembly is convenient, has reduced moreover with man-hour requirement to welding process, has improved production efficiency, has reduced manufacturing cost.
Description
Technical Field
The utility model relates to a low pressure electrical equipment, concretely relates to overpressure explosion-proof protection condenser.
Background
A power capacitor is a type of capacitor used in power systems and electrical equipment. The overpressure explosion-proof device for reliably blocking the internal fault of the capacitor is arranged in the existing power capacitor, when the capacitor element has a fault, the internal pressure of the capacitor element is increased to cause the shell to expand, and when the capacitor element is expanded and deformed to a certain degree, the weak point of the explosion-proof protection device is pulled to open the circuit, so that the capacitor is isolated from the power supply, and the capacitor is not expanded any more, and the explosion is avoided.
The traditional explosion-proof protection device for the power capacitor is connected with the shell by tin soldering, but the welding quality is affected by factors such as tin content of the shell, tin wires and operation proficiency, when the internal elements of the capacitor are broken down and damaged, the internal temperature of the capacitor can be rapidly increased to generate a large amount of gas, so that the shell is rapidly expanded, and the explosion-proof device and the shell fall off due to the insecure welding to cause explosion. When the manual soldering of soldering tin is carried out by operators, the operation intensity of reliably soldering the explosion-proof device in the shell is high, the quality control difficulty of products is high, and the production efficiency is low.
Disclosure of Invention
An object of the utility model is to overcome prior art's defect, provide a simple structure, high overpressure explosion-proof protection condenser of reliability.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides an overpressure explosion-proof protective capacitor, includes casing and explosion-proof equipment, explosion-proof equipment is including setting up the insulation board in the casing be provided with the rupture disc on the insulation board be equipped with a plurality of relative connecting pieces in the casing to form the clearance between every connecting piece and shells inner wall, be equipped with the mounting that can insert in the clearance in one side that the insulation board is close to the casing be equipped with the limit structure who mutually supports between mounting and the connecting piece, make the insulation board fixed on the casing.
Further, the fixing piece is fixed on the inner wall of the shell through single-side spot welding.
Furthermore, limit structure includes spacing cardboard and spacing recess that can mutually support, spacing cardboard sets up the one side that is close to shells inner wall at the connecting piece be equipped with spacing recess on the mounting, in the clearance between fixing piece insertion connecting piece and the casing, spacing cardboard card is gone into in the spacing recess and is used for spacing mounting.
Further, spacing cardboard slope sets up in one side of connecting piece, and spacing cardboard includes the cardboard body of slope, the contained angle number of degrees scope between cardboard body and the connecting piece is 0 ~ 20.
Furthermore, the connecting piece comprises a connecting plate with a concave surface, the concave surface is opposite to the inner wall of the shell and is matched with the inner wall of the shell to form a gap for inserting the fixing piece, a limiting clamping plate is arranged in the middle of the concave surface in a protruding mode, two sides of the connecting plate bend outwards and extend to form two connecting portions, and the connecting portions are welded on the inner wall of the shell through single-side spot welding.
Further, two spacing cardboard are including the cardboard body that the slope set up, contained angle between cardboard body and the connecting plate is 15 the terminal bending type of cardboard body forms the fillet that is used for preventing to drop, fillet and cardboard body towards shells inner wall one side formation scope is 165 ~ 170 contained angle.
Further, the mounting includes integrated into one piece's lateral wall and perpendicular wall, lateral wall and casing inner wall be used for perpendicularly with the marginal fixed connection of insulation board, perpendicular wall parallels and can insert the clearance between connecting piece and the casing inner wall the middle part of erecting the wall is equipped with spacing recess, spacing recess be used for with set up the limit structure cooperation on the connecting piece.
Further, the mounting includes integrated into one piece's lateral wall and perpendicular wall, lateral wall and casing inner wall be used for perpendicularly with the marginal fixed connection of insulation board, erect wall and casing inner wall and parallel and can insert in the clearance between connecting piece and the casing inner wall to be equipped with elasticity hook portion at the lower extreme of erecting the wall, elasticity hook portion can stretch out outside the clearance between connecting piece and the casing inner wall and with the lower limb card of connecting piece go into elasticity hook portion in, form limit structure by the lower limb of elasticity hook portion and connecting piece.
Further, the shell is oval or rectangular.
Furthermore, a K-shaped notch is formed in the same side of the two safety plates, and a through hole is formed in the insulating plate opposite to the K-shaped notch.
Compare with current explosion-proof equipment only through the fixed mode of soldering, the utility model discloses an overpressure protection capacitor, explosion-proof equipment's insulation board passes through mounting and connecting piece cooperation of pegging graft to it makes the insulation board firmly fixed in the casing to set up the limit structure who mutually supports between mounting and connecting piece, so the structure only needs make limit structure assemble in place in the assembling process, do not need extra manual operation to make mounting and connecting piece stable connection, not only the assembly is convenient, and the requirement of adding man-hour butt welding technology has been reduced, and the production efficiency is improved, and the production cost is reduced.
In addition, compare with the fixed mode of current two-sided spot welding, the mounting is fixed at shells inner wall through the mode of single face spot welding, and single face spot welding has reduced the spot welding trace on shell surface greatly, has promoted product appearance.
In addition, the limiting structure arranged between the fixing piece and the connecting piece comprises a limiting clamping plate and a limiting groove which can be matched with each other, so that the processing is easy, the production efficiency is improved, and the production cost is reduced.
Drawings
Fig. 1 is a schematic structural view (external) of an overpressure explosion-proof protective capacitor of the present invention;
fig. 2 is a schematic structural view (inside) of an overpressure explosion-proof protective capacitor according to the present invention;
FIG. 3 is a schematic structural view of an explosion protection device in an overpressure explosion protection capacitor according to the present invention;
FIGS. 4-5 are schematic structural views of a fixing member of an overpressure explosion-proof protective capacitor according to the present invention;
FIG. 6 is a schematic structural view of a connecting member in an overpressure explosion-proof protective capacitor according to the present invention;
fig. 7 is a schematic structural view of a limiting snap-gauge in an overpressure explosion-proof protective capacitor of the present invention;
fig. 8 is an installation schematic diagram of the connecting member in the overpressure explosion-proof protective capacitor of the present invention.
Detailed Description
The following description will further describe a specific embodiment of the overpressure explosion-proof capacitor according to the present invention with reference to the embodiments shown in fig. 1 to 8. The utility model discloses an excessive pressure explosion-proof protection condenser is not limited to the description of following embodiment.
The utility model provides an overpressure explosion-proof protective capacitor, includes casing 1 and explosion-proof equipment 2, explosion-proof equipment 2 is including setting up insulation board 21 in casing 1 be provided with rupture disc 22 on the insulation board 21 be equipped with a plurality of relative connecting pieces 23 in the casing 1 to form the clearance between every connecting piece 23 and casing 1 inner wall, be equipped with the mounting 24 that can insert in the clearance on one side that insulation board 21 is close to casing 1 be equipped with the limit structure of mutually supporting between mounting 24 and the connecting piece 23, make insulation board 21 fixed on casing 1.
Compare with current explosion-proof equipment 2 only through the fixed mode of soldering, the utility model discloses an overpressure protection capacitor, explosion-proof equipment 2's insulation board 21 passes through mounting 24 and connecting piece 23 grafting cooperation, and set up the limit structure who mutually supports between mounting 24 and connecting piece 23 and make insulation board 21 firmly fixed in casing 1, so the structure only needs make limit structure assemble in place in the assembling process, do not need extra manual operation to make mounting 24 and connecting piece 23 stable connection, not only the assembly is convenient, and reduced the requirement of adding man-hour to welding process, and the production efficiency is improved, and the production cost is reduced.
In connection with fig. 1-8, an embodiment of an overpressure explosion-proof capacitor is provided, which comprises a housing 1 and an explosion-proof device 2, wherein the housing 1 is oval in shape in this embodiment, and the housing 1 is made of surface-coated tinplate or stainless steel plate, but may also be a rectangular housing 1. The explosion-proof device 2 comprises an insulating plate 21 arranged in a shell 1, a through hole is arranged in the middle of the insulating plate 21, two parallel safety sheets 22 are arranged on the insulating plate 21, preferably, a K-shaped notch is arranged on the same side of the two safety sheets 22 and is opposite to the through hole of the insulating plate 21, two opposite connecting pieces 23 are arranged in the shell 1, preferably, the connecting pieces 23 are fixed on the inner wall of the shell 1 in a single-side spot welding mode, a gap is formed between each connecting piece 23 and the inner wall of the shell 1, a fixing piece 24 capable of being inserted into the gap is arranged on one side of each insulating plate 21 close to the shell 1, mutually matched limiting structures are arranged between the fixing piece 24 and the connecting piece 23, and in the process that the fixing piece 24 is inserted into the gap, after the limiting structures of the fixing piece 24 and the connecting piece 23 are in limiting, the insulating plate 21 is fixed to the case 1.
An embodiment of a limiting structure is provided with reference to fig. 2 to 7, the limiting structure includes a limiting snap-gauge 232 and a limiting groove 243, the limiting snap-gauge 232 is obliquely disposed on one side of the connecting member 23, the limiting snap-gauge 232 is located in a gap formed by the connecting member 23 and an inner wall of the housing 1, the fixing member 24 is provided with the limiting groove 243, the limiting snap-gauge 232 is snapped into the limiting groove 243 to limit the fixing member 24 when the fixing member 24 is inserted into the gap, preferably, the limiting snap-gauge 232 includes a snap-gauge body 2322 obliquely disposed on one side of the connecting member 23, an inclination angle of the snap-gauge body 2322 is preferably in a range favorable for insertion and fit, as shown in fig. 7, an included angle formed between the snap-gauge body 2322 and the connecting member 23 is preferably 0 to 20 degrees, an included angle is α in the figure, when the fixing member 24 is inserted into the gap, the snap, after the retention clip 232 snaps into the retention groove 243, the fastener 24 is captured. Further, it is preferable that the distal end of the stopper catch 232 is bent outward to form a rounded portion 2321 for preventing the separation. The limiting clamping plate 232 and the limiting groove 243 which can be matched with each other are used as limiting structures, so that the processing is easy, the production efficiency is improved, and the production cost is reduced.
As shown in fig. 3, 6 and 7, the connecting member 23 includes a connecting plate 231 having a concave surface, preferably, two sides of the connecting plate 231 are bent to make the connecting plate 231 integrally form a "[", a gap for inserting the fixing member 24 is formed by the concave surface at the middle of the connecting plate 231 facing the inner wall of the casing 1 and matching with the inner wall of the casing 1, two limit snap-gauge boards 232 for limit matching with the fixing member 24 are protruded at the middle of the concave surface, preferably, the two limit snap-gauge boards 232 are laterally juxtaposed, although they may also be vertically juxtaposed, two sides of the connecting plate 231 are bent outward to form two connecting portions 233, the connecting portions 233 are welded on the inner wall of the casing 1 by multi-point single-side spot welding, preferably, the concave surface is a plane parallel to the inner wall of the casing 1, the two limit snap-gauge boards 232 each include a snap-gauge body 2322, the included angle (α in the figure) between the clamping plate body 2322 and the connecting plate 231 is preferably 15 °, and may be 10 ° of course; the tail end of the clamping plate body 2322 is bent to form a round corner portion 2321, an included angle (denoted by β in fig. 7) in the range of 165-170 degrees is formed between the round corner portion 2321 and the side, facing the inner wall of the housing 1, of the clamping plate body 2322, and preferably, the round corner portion 2321 enables the tail end face of the limiting clamping plate 2322 to be arc-shaped.
As shown in fig. 3 to 5, the fixing member 24 includes a transverse wall 241 and a vertical wall 242 that are integrally formed, and preferably, the transverse wall 241 and the vertical wall 242 form an L-shaped structure, but may also be connected to form a T-shaped structure, and in addition, the transverse wall 241 and the vertical wall 242 may also be connected by a plug-in or other fixing method. The transverse wall 241 is perpendicular to the inner wall of the casing 1 and is used for being fixedly connected with the edge of the insulating plate 21, the vertical wall 242 is parallel to the inner wall of the casing 1 and can be inserted into a gap formed between the connecting piece 23 and the inner wall of the casing 1, a limiting groove 243 is arranged in the middle of the vertical wall 242, and the limiting groove 243 is used for being matched with a limiting structure arranged on the connecting piece 23.
An embodiment (not shown) of the second limit structure is provided, wherein the fixing member 24 includes a transverse wall 241 and a vertical wall 242 which are integrally formed, the transverse wall 241 is perpendicular to the inner wall of the casing 1 for fixedly connecting with the edge of the insulating plate 21, the vertical wall 242 is parallel to the inner wall of the casing 1 and can be inserted into the gap between the connecting member 23 and the inner wall of the casing 1, and an elastic hook portion is provided at the lower end of the vertical wall 242, the elastic hook portion enables the elastic hook portion to be elastically pressed under the matching of the fixing member 24 and the connecting member 23 when the fixing member 24 is inserted into the gap between the connecting member 23 and the inner wall of the casing 1, the elastic hook portion can extend out of the gap, and releases the elastic force when the elastic hook portion extends, the lower edge of the connecting member 23 is clamped into the elastic hook portion, and the limit structure is formed by the elastic hook portion and. Preferably, the elastic hook portion is formed by folding back the lower edge of the vertical wall 242, and of course, the elastic hook portion may be a hook structure fixed to the lower end of the vertical wall 242, and the folded portion of the hook structure faces the direction of the connecting member 23.
In the application, when single-side spot welding is carried out, the shell 1 and the connecting piece 23 form certain contact resistance under the pressure of two welding electrodes, wherein one welding electrode adopts the same-direction electrode current to circulate in the shell to form a loop, and the other welding electrode in contact with the outer side of the shell 1 is not conductive and only plays a role in fixing, so that spot welding marks left on the outer side of the shell 1 are greatly reduced, and the appearance of a product is improved.
The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.
Claims (10)
1. The utility model provides an overpressure explosion-proof protective capacitor, includes casing (1) and explosion-proof equipment (2), explosion-proof equipment (2) are including setting up insulation board (21) in casing (1) be provided with rupture disc (22), its characterized in that on insulation board (21): the insulation board fixing structure is characterized in that a plurality of opposite connecting pieces (23) are arranged in the shell (1), a gap is formed between each connecting piece (23) and the inner wall of the shell (1), a fixing piece (24) capable of being inserted into the gap is arranged on one side, close to the shell (1), of the insulation board (21), and a limiting structure matched with each other is arranged between the fixing piece (24) and the connecting piece (23) so that the insulation board (21) is fixed on the shell (1).
2. An overpressure explosion protection capacitor as set forth in claim 1 wherein: the fixing piece (24) is fixed on the inner wall of the shell (1) through single-side spot welding.
3. An overpressure explosion protection capacitor as set forth in claim 1 wherein: the limiting structure comprises a limiting clamping plate (232) and a limiting groove (243) which can be matched with each other, the limiting clamping plate (232) is arranged on one side, close to the inner wall of the shell (1), of the connecting piece (23), the limiting groove (243) is formed in the fixing piece (24), the fixing piece (24) is inserted into a gap between the connecting piece (23) and the shell (1), and the limiting clamping plate (232) is clamped into the limiting groove (243) to limit the fixing piece (24).
4. An overpressure explosion protection capacitor as set forth in claim 3 wherein: spacing cardboard (232) slope setting is in one side of connecting piece (23), and spacing cardboard (232) are including cardboard body (2322) of slope, contained angle number of degrees scope between cardboard body (2322) and connecting piece (23) is 0 ~ 20.
5. An overpressure explosion protection capacitor as set forth in claim 1 or 3, wherein: the connecting piece (23) comprises a connecting plate (231) with a concave surface, the concave surface is opposite to the inner wall of the shell (1) and is matched with the inner wall of the shell (1) to form a gap for inserting the fixing piece (24), a limiting clamping plate (232) is convexly arranged in the middle of the concave surface, two sides of the connecting plate (231) are bent outwards and extend to form two connecting parts (233), and the connecting parts (233) are welded on the inner wall of the shell (1) through single-side spot welding.
6. An overpressure explosion protection capacitor as set forth in claim 5, wherein: two spacing cardboard (232) are including cardboard body (2322) that the slope set up, contained angle between cardboard body (2322) and connecting plate (231) is 15 the terminal bending type of cardboard body (2322) forms fillet portion (2321) that is used for preventing to drop, fillet portion (2321) and cardboard body (2322) towards casing (1) inner wall one side formation scope is 165 ~ 170 contained angle.
7. An overpressure explosion protection capacitor as set forth in claim 1 wherein: the fixing piece (24) comprises a transverse wall (241) and a vertical wall (242) which are integrally formed, the transverse wall (241) is perpendicular to the inner wall of the shell (1) and is fixedly connected with the edge of the insulating plate (21), the vertical wall (242) is parallel to the inner wall of the shell (1) and can be inserted into a gap between the connecting piece (23) and the inner wall of the shell (1), a limiting groove (243) is formed in the middle of the vertical wall (242), and the limiting groove (243) is used for being matched with a limiting structure arranged on the connecting piece (23).
8. An overpressure explosion protection capacitor as set forth in claim 1 wherein: mounting (24) are including integrated into one piece's lateral wall (241) and perpendicular wall (242), lateral wall (241) and casing (1) inner wall looks perpendicular be used for with the edge fixed connection of insulation board (21), perpendicular wall (242) are parallel and can insert in the clearance between connecting piece (23) and casing (1) inner wall with casing (1) inner wall to be equipped with elasticity hook portion at the lower extreme of perpendicular wall (242), elasticity hook portion can stretch out outside the clearance between connecting piece (23) and casing (1) inner wall and with the lower limb card of connecting piece (23) go into elasticity hook portion in, form limit structure by the lower limb of elasticity hook portion and connecting piece (23).
9. An overpressure explosion protection capacitor as set forth in claim 1 wherein: the shell (1) is oval or rectangular.
10. An overpressure explosion protection capacitor as set forth in claim 1 wherein: k-shaped notches are formed in the same side of the two safety plates (22), and through holes are formed in the insulating plate (21) opposite to the K-shaped notches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022481304.8U CN213691775U (en) | 2020-10-30 | 2020-10-30 | Overpressure explosion-proof protective capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022481304.8U CN213691775U (en) | 2020-10-30 | 2020-10-30 | Overpressure explosion-proof protective capacitor |
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| Publication Number | Publication Date |
|---|---|
| CN213691775U true CN213691775U (en) | 2021-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022481304.8U Active CN213691775U (en) | 2020-10-30 | 2020-10-30 | Overpressure explosion-proof protective capacitor |
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| CN (1) | CN213691775U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114694965A (en) * | 2022-04-28 | 2022-07-01 | 安徽麦特电子股份有限公司 | Low pressure parallel capacitor is with shell that takes explosion-proof construction |
-
2020
- 2020-10-30 CN CN202022481304.8U patent/CN213691775U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114694965A (en) * | 2022-04-28 | 2022-07-01 | 安徽麦特电子股份有限公司 | Low pressure parallel capacitor is with shell that takes explosion-proof construction |
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