CN216648085U

CN216648085U - Explosion-proof automatic air-release decompression metallized film capacitor

Info

Publication number: CN216648085U
Application number: CN202122663851.2U
Authority: CN
Inventors: 周峰; 王金兵
Original assignee: Anhui Saifu Capacitor Co ltd
Current assignee: Anhui Saifu Capacitor Co ltd
Priority date: 2021-10-29
Filing date: 2021-10-29
Publication date: 2022-05-31
Anticipated expiration: 2031-10-29

Abstract

The utility model provides an explosion-proof automatic-deflation decompression metallized film capacitor, which relates to the technical field of capacitors and comprises a capacitor body and an explosion-proof shell covering and fixed on the outer side of the capacitor body, wherein a decompression inner cavity is formed at the inner bottom end of the explosion-proof shell, decompression assemblies are arranged at two ends in the decompression inner cavity, an air channel for communicating the decompression inner cavity with the outer side of the explosion-proof shell is formed in each decompression assembly, each decompression assembly comprises a buffer part for closing the air channel, and the expanded air in the decompression inner cavity pushes the buffer part to close the air channel. The pressure relief effect is generated in the pressure relief inner cavity, so that the possibility of explosion of the explosion-proof shell can be reduced; the high-pressure gas consumes kinetic energy by pushing the buffer component, and plays an explosion-proof role.

Description

Explosion-proof automatic air-release decompression metallized film capacitor

Technical Field

The utility model relates to the technical field of capacitors, in particular to an explosion-proof automatic-deflation decompression metallized film capacitor.

Background

The metallized film capacitor can be roughly classified into a metallized film capacitor using a metal foil for an electrode and a metallized film capacitor using a deposited metal provided on a dielectric film for an electrode. Among these, a metallized film capacitor having a metal vapor-deposited electrode formed of a vapor-deposited metal as an electrode occupies a smaller volume than a metallized film capacitor using a metal foil as an electrode, and can be made smaller and lighter.

However, when the weak metallized capacitor is connected to a circuit, if the current in the circuit is too large, the capacitor generates a large amount of heat, so that an explosion-proof case needs to be mounted on the capacitor to improve the safety of the capacitor. However, a cavity is often formed between the capacitor and the explosion-proof shell, after the capacitor releases heat, air in the cavity expands, but the air cannot be released and cannot be decompressed, so that the possibility of explosion still exists, and potential safety hazards exist.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides an explosion-proof automatic-deflation decompression metallized film capacitor.

The utility model solves the technical problems through the following technical means: explosion-proof automatic gassing's decompression metallized film capacitor, including capacitor body, cover the explosion-proof shell that is fixed in the capacitor body outside, the inner bottom end of explosion-proof shell is formed with the pressure release inner chamber, and the intracavity both ends all are provided with the pressure release subassembly in the pressure release, and the inside air passage that is linked together the pressure release inner chamber and the explosion-proof shell outside that is formed with of pressure release subassembly, the pressure release subassembly is including the buffer part who is used for closed air passage, and the expanded gaseous promotion buffer part of intracavity is closed to the air passage end in the pressure release.

Furthermore, the pressure relief assembly comprises a pressure relief cavity fixed at the bottom end of the pressure relief inner cavity, a first air outlet channel and a second air outlet channel are respectively formed at two ends of the pressure relief cavity, and the second air outlet channel and the first air outlet channel are matched with the inner cavity of the pressure relief cavity to form an air channel.

Further, the buffer part comprises a buffer block sliding along the inner bottom surface of the pressure relief cavity, one side of the buffer block, which is close to the second air outlet channel, is fixedly connected with a baffle plate, and one side of the buffer block, which is close to the first air outlet channel, is provided with a buffer spring.

Furthermore, a limiting sliding block is fixed to the bottom surface of the buffering block, a limiting sliding groove is formed in the pressure release cavity relative to the inner bottom surface of the limiting sliding block, and the limiting sliding block is matched with the limiting sliding groove.

Furthermore, the pressure relief cavity is provided with a positioning component relative to the inner top surface of the buffer block, and a first positioning groove and a second positioning groove matched with the positioning component are formed at two ends of the buffer block respectively.

Furthermore, the positioning part comprises a limiting spring fixed on the inner top surface of the pressure relief cavity, and the bottom end of the limiting spring is fixedly connected with a limiting rolling ball matched with the second positioning groove and the first positioning groove in a homogeneous manner.

Furthermore, be provided with coupling assembling between the fender and the relative second of pressure release cavity ventiduct place one side inner wall, coupling assembling forms to dismantle between fender and the pressure release cavity and is connected.

Further, the fixed spliced pole that is provided with in one side that separates the shelves and is close to the pressure release cavity, the joint ring has been cup jointed in the terminal outside of spliced pole, and the spliced groove has been seted up for the surface of spliced pole to the pressure release cavity, and the joint groove has been seted up to the inner wall of spliced groove, joint groove and joint ring looks block.

The utility model has the beneficial effects that:

according to the utility model, air under a high-pressure state pushes the buffer part to stop the air channel, the air channel is in an open state, high-pressure air flows out from the air channel, a pressure relief effect is generated in the pressure relief inner cavity, and the possibility of explosion of the explosion-proof shell can be reduced; when the capacitor body explodes, the high-pressure gas consumes kinetic energy by pushing the buffer part, the explosion impact force can be reduced, the pressure relief assembly plays an explosion-proof role, and the safety of the capacitor body is improved.

Drawings

FIG. 1 is a schematic cross-sectional view of a capacitor according to the present invention;

FIG. 2 is a schematic cross-sectional view of a pressure relief assembly of the present invention;

FIG. 3 is an enlarged view of the structure at A in FIG. 2 according to the present invention;

fig. 4 is an enlarged view of the structure at B in fig. 3 according to the present invention.

In the figure: 10. a capacitor body; 20. an explosion-proof shell; 21. a pressure relief inner cavity; 30. a pressure relief assembly; 31. a buffer member; 311. a buffer spring; 312. a buffer block; 313. a first positioning groove; 314. a limiting slide block; 315. a limiting chute; 316. a baffle plate; 317. a second positioning groove; 32. a pressure relief cavity; 33. a first gas outlet channel; 34. a positioning member; 341. a limiting spring; 342. limiting the rolling ball; 35. a second gas outlet channel; 40. a connecting assembly; 41. inserting the column; 42. a snap ring; 43. inserting grooves; 44. a clamping groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Examples

As shown in fig. 1 and fig. 2, the present embodiment is a decompression metallized film capacitor with explosion-proof automatic deflation, which comprises a capacitor body 10 and an explosion-proof case 20 fixed outside the capacitor body 10 in a covering manner, wherein a pressure relief inner cavity 21 is formed at the inner bottom end of the explosion-proof case 20, pressure relief assemblies 30 are respectively arranged at two ends of the pressure relief inner cavity 21, an air passage communicating the pressure relief inner cavity 21 with the outside of the explosion-proof case 20 is formed inside the pressure relief assemblies 30, the pressure relief assemblies 30 comprise a buffer component 31 for closing the air passage, and the expanded air in the pressure relief inner cavity 21 pushes the buffer component 31 to close the air passage.

When the explosion-proof shell 20 is heated seriously or even self-ignited to self-explode, the air in the pressure relief inner cavity 21 expands under the action of heat, the air in a high-pressure state pushes the buffer part 31 to move towards one end far away from the pressure relief inner cavity 21 until the buffer part 31 does not block the air duct any more, at the moment, the air duct is in an open state, the high-pressure air flows out from the air duct, the pressure relief effect is generated in the pressure relief inner cavity 21, and the possibility of explosion of the explosion-proof shell 20 can be reduced; when the capacitor body 10 explodes, the high-pressure gas consumes kinetic energy by pushing the buffer part 31, so that the explosion impact force can be reduced, the pressure relief assembly 30 plays an explosion-proof role, and the safety of the capacitor body 10 is further improved.

Referring to fig. 2 and 3, the pressure relief assembly 30 includes a pressure relief cavity 32 fixed at the inner bottom end of the pressure relief cavity 21, a first air outlet channel 33 and a second air outlet channel 35 are respectively disposed at two ends of the pressure relief cavity 32, and the second air outlet channel 35 and the first air outlet channel 33 cooperate with an inner cavity of the pressure relief cavity 32 to form an air passage.

When the pressure relief cavity is used, under the action of air pressure difference, air in the pressure relief cavity 21 enters the inside of the pressure relief cavity 32 through the second air outlet channel 35 and then flows out from the pressure relief cavity 32 through the first air outlet channel 33, and a pressure relief effect is formed on the pressure relief cavity 21.

Referring to fig. 2, the buffering component 31 includes a buffering block 312 sliding along the inner bottom surface of the pressure relief cavity 32, a baffle 316 is fixedly connected to one side of the buffering block 312 close to the second air outlet channel 35, and a buffering spring 311 is disposed on one side of the buffering block 312 close to the first air outlet channel 33.

During the use, when the inside atmospheric pressure of pressure release inner chamber 21 is great, high-pressure gas contacts with the surface that separates the fender board 316 through second gas outlet channel 35, promote buffer block 312 through separating the fender board 316 and remove to the one side at first gas outlet channel 33 place, buffer spring 311 atress shrink under the normal condition originally, until separating the fender board 316 and no longer producing to support tightly the cover to second gas outlet channel 35, at this moment, the air in the pressure release inner chamber 21 passes through the inside that second gas outlet channel 35 got into pressure release cavity 32, then flow out from first gas outlet channel 33, the pressure in the pressure release inner chamber 21 reduces this moment, the effect of stepping down has been played.

Referring to fig. 2 and 3, a limiting slide block 314 is fixed on the bottom surface of the buffer block 312, a limiting slide groove 315 is formed on the inner bottom surface of the pressure relief cavity 32 relative to the limiting slide block 314, and the limiting slide block 314 is matched with the limiting slide groove 315.

When the limiting sliding block type buffer block is used, the limiting sliding block 314 slides along the limiting sliding groove 315, so that the buffer block 312 can only move within a certain range, the buffer spring 311 can only stretch and contract within a certain range, and fatigue of the buffer spring 311 is avoided.

Referring to fig. 2, the pressure relief cavity 32 is provided with a positioning component 34 corresponding to the inner top surface of the buffer block 312, and a first positioning groove 313 and a second positioning groove 317 which are matched with the positioning component 34 are respectively formed at two ends of the buffer block 312.

During the use, when the atmospheric pressure in the pressure release inner chamber 21 is relatively less, high-pressure gas promotes first constant head tank 313 and locating component 34 looks adaptation, locating component 34 is spacing to buffer block 312, thereby make between buffer spring 311's the shrink and the gaseous pressure keep balance, and then maintain buffer block 312's relative stability, when the interior atmospheric pressure of pressure release inner chamber 21 is relatively great, locating component 34 and the second constant head tank 317 looks adaptation of keeping away from second ventiduct 35 one end, produce spacingly to buffer block 312, thereby avoid buffer spring 311 to be further compressed, cause the damage to buffer spring 311, after the gas pressure in the pressure release inner chamber 21 resumes normally, buffer spring 311 promotes buffer block 312 and resets.

Referring to fig. 2, the positioning component 34 includes a limiting spring 341 fixed on the inner top surface of the pressure relief cavity 32, and a limiting rolling ball 342 adapted to the second positioning groove 317 and the first positioning groove 313 is fixedly connected to the bottom end of the limiting spring 341.

During the use, through second constant head tank 317, first constant head tank 313 respectively with spacing spin 342 looks block, all can play limiting displacement to buffer block 312.

Referring to fig. 3 and 4, a connecting assembly 40 is disposed between the baffle 316 and the inner wall of the pressure relief cavity 32 on the side opposite to the second air outlet channel 35, and the connecting assembly 40 forms a detachable connection between the baffle 316 and the pressure relief cavity 32.

Referring to fig. 4, a plug column 41 is fixedly disposed on one side of the baffle 316 close to the pressure relief cavity 32, a clamping ring 42 is sleeved on the outer side of the end of the plug column 41, a plug groove 43 is disposed on the surface of the pressure relief cavity 32 opposite to the plug column 41, a clamping groove 44 is disposed on the inner wall of the plug groove 43, and the clamping groove 44 is clamped with the clamping ring 42.

When the buffer spring is used, the clamping ring 42 is clamped with the clamping groove 44, the pressure relief cavity 32 and the baffle plate 316 are detachably connected, and the baffle plate 316 can be prevented from being easily separated from the second air outlet channel 35 under the action of air pressure when the buffer spring 311 cannot provide enough elasticity.

It is noted that, in this document, relational terms such as first and second, and the like, if any, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. Explosion-proof automatic decompression metallized film capacitor who deflates, including capacitor body (10), cover explosion-proof shell (20) that are fixed in capacitor body (10) outside, its characterized in that: the interior bottom end of explosion-proof shell (20) is formed with pressure release inner chamber (21), and both ends all are provided with pressure release subassembly (30) in pressure release inner chamber (21), and pressure release subassembly (30) inside is formed with the air vent that is linked together pressure release inner chamber (21) and explosion-proof shell (20) outside, pressure release subassembly (30) are including buffer member (31) that are used for closed air vent, and the inflation gas promotion buffer member (31) in pressure release inner chamber (21) finishes the closure to the air vent.

2. The explosion-proof self-venting reduced-pressure metallized film capacitor of claim 1, wherein: the pressure relief assembly (30) comprises a pressure relief cavity (32) fixed at the inner bottom end of the pressure relief inner cavity (21), a first air outlet channel (33) and a second air outlet channel (35) are respectively formed at two ends of the pressure relief cavity (32), and the second air outlet channel (35) and the first air outlet channel (33) are matched with the inner cavity of the pressure relief cavity (32) to form an air passage.

3. The explosion-proof self-venting reduced-pressure metallized film capacitor of claim 2, wherein: buffer part (31) include along gliding buffer block (312) of bottom surface in pressure release cavity (32), one side fixedly connected with that buffer block (312) are close to second gas outlet channel (35) separates plate washer (316), one side that buffer block (312) are close to first gas outlet channel (33) is provided with buffer spring (311).

4. The explosion-proof self-venting reduced-pressure metallized film capacitor of claim 3, wherein: the bottom surface of buffer block (312) is fixed with spacing slider (314), and spacing spout (315) have been seted up for the interior bottom surface of spacing slider (314) in pressure release cavity (32), and spacing slider (314) and spacing spout (315) looks adaptation.

5. The explosion-proof self-venting reduced-pressure metallized film capacitor of claim 4, wherein: the pressure relief cavity (32) is provided with positioning component (34) for the interior top surface of buffer block (312), the both ends of buffer block (312) are formed with first constant head tank (313) and second constant head tank (317) with positioning component (34) looks adaptation respectively.

6. The explosion-proof self-venting reduced-pressure metallized film capacitor of claim 5, wherein: the positioning component (34) comprises a limiting spring (341) fixed on the inner top surface of the pressure relief cavity (32), and the bottom end of the limiting spring (341) is fixedly connected with a limiting rolling ball (342) matched with the second positioning groove (317) and the first positioning groove (313).

7. The explosion-proof self-venting reduced-pressure metallized film capacitor of claim 3, wherein: and a connecting component (40) is arranged between the baffle plate (316) and the inner wall of one side of the pressure release cavity (32) where the second air outlet channel (35) is located, and the connecting component (40) is detachably connected between the baffle plate (316) and the pressure release cavity (32).

8. The explosion-proof self-venting reduced-pressure metallized film capacitor of claim 7, wherein: one side of the baffle plate (316) close to the pressure relief cavity (32) is fixedly provided with a plug column (41), the outer side of the tail end of the plug column (41) is sleeved with a clamping ring (42), the surface of the pressure relief cavity (32) relative to the plug column (41) is provided with a plug groove (43), the inner wall of the plug groove (43) is provided with a clamping groove (44), and the clamping groove (44) is clamped with the clamping ring (42).