Safety capacitor with explosion-proof function

Abstract

The utility model provides a safety capacitor with an explosion-proof function, which comprises an explosion-proof assembly, and the explosion-proof assembly comprises a capacitor body, an explosion-proof seat, an external thread cylinder, an explosion-proof outer shell, a buffer spring, an explosion-proof inner shell, a buffer cavity, an explosion-proof membrane, an explosion-proof hole and an explosion-proof groove. The bottom of the capacitor body is fixedly connected with an explosion-proof seat, an external thread cylinder is welded to the outer side, close to the capacitor body, of the upper surface of the explosion-proof seat, and the inner side wall of the external thread cylinder is fixedly connected to the bottom of the outer side wall of the capacitor body. According to the utility model, the explosion-proof film is broken to release the internal pressure of the capacitor body, the impact force caused by the instantly rising pressure is buffered through the buffer cavity and the buffer spring, and meanwhile, when the internal pressure impacts the explosion-proof inner shell to move upwards and compress the buffer spring, the volume of the buffer cavity is increased along with the upward movement of the explosion-proof inner shell; therefore, the impact force is further absorbed, the capacitor body is prevented from exploding, the safety of the capacitor is remarkably improved, and the life and property safety of a user is effectively protected.

Description

Technical Field

[0001] The utility model relates to the technical field of safety capacitors, in particular to a safety capacitor with an explosion-proof function. Background Art

[0002] Safety capacitors refer to safe capacitors that will not cause electric shock or endanger personal safety after the capacitor fails. They are usually only used for filtering in anti-interference circuits. They are used in power filters to filter the power supply, filtering common-mode and differential-mode interference respectively. For safety and EMC considerations, it is generally recommended to add safety capacitors at the power inlet. The application scenarios of safety capacitors mainly include various household appliances and industrial equipment, such as televisions, stereos, computers, air conditioners, etc. When designing and manufacturing these devices, it is necessary to select safety capacitors that meet the requirements in accordance with national and regional standards, and correctly install them on the power and signal lines to ensure the safety and normal operation of the equipment;

[0003] Existing safety capacitors do not have explosion-proof functions. When in use, if a short circuit or overload occurs inside, high temperature and high pressure will be generated, which can easily cause the capacitor to explode, posing a threat to the safety of users. In electronic equipment, when a short circuit or overload occurs inside a safety capacitor, high temperature and high pressure may indeed be generated, which increases the risk of capacitor explosion, thus posing a threat to the safety of users. This potential safety hazard needs to be given enough attention.

[0004] To solve this problem, our R&D personnel can consider improving safety capacitors to enhance their explosion-proof functions. This may include using more advanced materials and designs to improve the heat and pressure resistance of capacitors. In addition, it is also possible to consider adding a protective shell or other protective measures to the outside of the capacitor to reduce the damage to users from fragments and ejections generated during an explosion.

[0005] At the same time, it is also very important for users to understand and comply with the specifications and precautions for the use of capacitors. For example, avoid applying excessive voltage or current to the capacitor to avoid internal short circuits or overloads. In addition, it is also essential to regularly check the working status and appearance of the capacitor to promptly discover and deal with potential safety hazards.

[0006] Therefore, a safety capacitor with explosion-proof function is proposed. Utility Model Content

[0007] In view of this, the present invention hopes to provide a safety capacitor with explosion-proof function to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial choice.

[0008] The technical solution of the embodiment of the utility model is implemented as follows: a safety capacitor with explosion-proof function, including an explosion-proof component, the explosion-proof component includes a capacitor body, an explosion-proof seat, an external threaded cylinder, an explosion-proof outer shell, a buffer spring, an explosion-proof inner shell, a buffer cavity, an explosion-proof membrane, an explosion-proof hole and an explosion-proof groove;

[0009] The bottom of the capacitor body is fixedly connected with an explosion-proof seat, the upper surface of the explosion-proof seat is welded with an external threaded barrel near the outer side of the capacitor body, the inner wall of the external threaded barrel is fixedly connected to the bottom of the outer wall of the capacitor body, the outer wall of the external threaded barrel is threadedly connected with an explosion-proof shell, the inner top wall of the explosion-proof shell is fixedly connected with a buffer spring, the bottom of the buffer spring is fixedly connected with an explosion-proof inner shell, the outer wall of the explosion-proof inner shell is slidably connected to the inner wall of the explosion-proof shell, the outer wall of the capacitor body is slidably connected to the lower part of the inner wall of the explosion-proof inner shell near the upper part of the external threaded barrel, the lower surface of the explosion-proof inner shell is fitted and connected to the upper surface of the external threaded barrel, the inner wall of the explosion-proof inner shell is provided with a buffer cavity near the upper part of the capacitor body, the upper surface of the capacitor body is provided with an explosion-proof membrane, an explosion-proof hole is opened at the center of the upper surface of the explosion-proof membrane, and the inner wall of the explosion-proof hole is provided with a plurality of explosion-proof grooves around the inner wall.

[0010] Further preferably, an exhaust hole is provided at the center of the upper surface of the explosion-proof housing.

[0011] Further preferably, a limiting ring is welded to the outer side wall of the explosion-proof seat, and the outer side of the upper surface of the limiting ring is closely connected to the outer side of the lower surface of the explosion-proof housing.

[0012] Further preferably, a sealing ring is fixedly connected to the inner side of the upper surface of the limiting ring, a sealing groove is opened on the inner side of the lower surface of the explosion-proof housing, and the outer side wall of the sealing ring is closely connected to the inner side wall of the sealing groove.

[0013] Further preferably, connecting pins are provided on both sides of the lower surface of the capacitor.

[0014] Further preferably, through holes are opened on both sides of the lower surface of the explosion-proof seat, the inner wall of the through hole is fixedly connected with an insulating sleeve, and the top of the outer wall of the connecting pin is fitted and connected to the inner wall of the insulating sleeve.

[0015] Further preferably, the upper portion of the outer side wall of the explosion-proof housing is provided with anti-slip grooves.

[0016] Further preferably, a protective film is fixedly connected to the inner wall of the exhaust hole.

[0017] The embodiment of the utility model has the following advantages due to the adoption of the above technical solution:

[0018] The utility model releases the internal pressure of the capacitor body by rupturing the explosion-proof membrane, and buffers the impact force caused by the instantaneous increase in pressure through the buffer cavity and the buffer spring. At the same time, when the internal pressure impacts the explosion-proof inner shell to move upward and compress the buffer spring, the volume of the buffer cavity also increases as the explosion-proof inner shell moves upward, thereby further absorbing the impact force and preventing the capacitor body from exploding, thereby significantly improving the safety of the capacitor and effectively protecting the life and property of users.

[0019] The above summary is for the purpose of description only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the utility model will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is the overall structure diagram of the utility model;

[0022] Figure 2 It is the overall cutaway structural diagram of the utility model;

[0023] Figure 3 This is a structural diagram of the external threaded barrel and explosion-proof housing of the utility model;

[0024] Figure 4 For the utility model Figure 2 Magnified view of area A.

[0025] Figure numerals: 1. explosion-proof component; 11. capacitor body; 12. explosion-proof seat; 13. external threaded cylinder; 14. explosion-proof outer shell; 15. buffer spring; 16. explosion-proof inner shell; 17. buffer chamber; 18. explosion-proof membrane; 19. explosion-proof hole; 20. explosion-proof groove; 21. exhaust hole; 22. limiting ring; 23. sealing ring; 24. sealing groove; 25. connecting pin; 26. through hole; 27. insulating sleeve; 28. anti-slip pattern; 29. ​​protective film. DETAILED DESCRIPTION

[0026] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0027] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0028] like Figure 1 - Figure 4 As shown, the embodiment of the utility model provides a safety capacitor with explosion-proof function, including an explosion-proof component 1, the explosion-proof component 1 includes a capacitor body 11, an explosion-proof seat 12, an external threaded cylinder 13, an explosion-proof outer shell 14, a buffer spring 15, an explosion-proof inner shell 16, a buffer cavity 17, an explosion-proof membrane 18, an explosion-proof hole 19 and an explosion-proof groove 20;

[0029] The bottom of the capacitor body 11 is fixedly connected with an explosion-proof seat 12, and the upper surface of the explosion-proof seat 12 is welded with an external threaded tube 13 near the outer side of the capacitor body 11, and the inner wall of the external threaded tube 13 is fixedly connected to the bottom of the outer wall of the capacitor body 11, and the outer wall of the external threaded tube 13 is threadedly connected with an explosion-proof shell 14, and the inner top wall of the explosion-proof shell 14 is fixedly connected with a buffer spring 15, and the bottom of the buffer spring 15 is fixedly connected with an explosion-proof inner shell 16, and the outer wall of the explosion-proof inner shell 16 is slidably connected to the inner wall of the explosion-proof shell 14, and the outer wall of the capacitor body 11 is close to the external threaded tube. The upper part of 13 is slidably connected to the lower part of the inner wall of the explosion-proof inner shell 16, the lower surface of the explosion-proof inner shell 16 is fitted and connected to the upper surface of the external threaded tube 13, the inner wall of the explosion-proof inner shell 16 is close to the upper part of the capacitor body 11. A buffer cavity 17 is provided, and an explosion-proof membrane 18 is provided on the upper surface of the capacitor body 11. An explosion-proof hole 19 is provided at the center of the upper surface of the explosion-proof membrane 18, and a plurality of explosion-proof grooves 20 are provided around the inner wall of the explosion-proof hole 19. The explosion-proof outer shell 14 and the explosion-proof inner shell 16 are both made of materials with certain strength and toughness, such as polycarbonate or nylon.

[0030] In one embodiment, specifically: an exhaust hole 21 is opened at the center of the upper surface of the explosion-proof outer shell 14, and the exhaust hole 21 is used to discharge the gas in the cavity between the explosion-proof outer shell 14 and the explosion-proof inner shell 16 when the explosion-proof inner shell 16 moves upward.

[0031] In one embodiment, specifically: a limiting ring 22 is welded to the outer wall of the explosion-proof seat 12, and the outer side of the upper surface of the limiting ring 22 is fitted and connected to the outer side of the lower surface of the explosion-proof shell 14, and the upper surface of the limiting ring 22 and the lower surface of the explosion-proof shell 14 are fitted together to limit the explosion-proof shell 14.

[0032] In one embodiment, specifically: a sealing ring 23 is fixedly connected to the inner side of the upper surface of the limiting ring 22, a sealing groove 24 is opened on the inner side of the lower surface of the explosion-proof housing 14, and the outer wall of the sealing ring 23 is fitted and connected to the inner wall of the sealing groove 24. Through the sealing cooperation between the sealing ring 23 and the sealing groove 24, the sealing between the explosion-proof housing 14 and the limiting ring 22 is increased to prevent dust, moisture, etc. from entering the interior.

[0033] In one embodiment, specifically: connecting pins 25 are provided on both sides of the lower surface of the capacitor body 11 , and the connecting pins 25 are used to facilitate the connection and installation of the capacitor body 11 .

[0034] In one embodiment, specifically: through holes 26 are opened on both sides of the lower surface of the explosion-proof seat 12, and the inner wall of the through hole 26 is fixedly connected with an insulating sleeve 27, and the top of the outer wall of the connecting pin 25 is fitted and connected to the inner wall of the insulating sleeve 27. Through the insulation effect of the insulating sleeve 27 outside the connecting pin 25, the connecting pin 25 is prevented from contacting the explosion-proof seat 12 and causing a short circuit.

[0035] In one embodiment, specifically: an anti-slip pattern 28 is provided on the upper portion of the outer wall of the explosion-proof housing 14 . The anti-slip pattern 28 on the explosion-proof housing 14 can improve the user's holding stability, thereby facilitating installation and removal.

[0036] In one embodiment, specifically: a protective film 29 is fixedly connected to the inner wall of the exhaust hole 21, and the protective film 29 inside the exhaust hole 21 protects against dust and moisture from entering the interior, and the protective film 29 can be broken through when the exhaust hole 21 is depressurized.

[0037] During operation of the utility model: when the internal pressure of the capacitor body 11 rises abnormally and instantaneously, the explosion-proof membrane 18 will first rupture and release the internal pressure through the arrangement of the explosion-proof holes 19 and the explosion-proof grooves 20 on the explosion-proof membrane 18, thereby preventing the capacitor body 11 from exploding; the buffer cavity 17 between the capacitor body 11 and the explosion-proof inner shell 16 can play a certain buffering role, reducing the impact force of the internal pressure on the explosion-proof inner shell 16; at the same time, the buffer spring 15 inside the explosion-proof outer shell 14 can also absorb part of the impact force; when the internal pressure impacts the explosion-proof inner shell 16 and moves up and compresses the buffer spring 15, the volume of the buffer cavity 17 also increases as the explosion-proof inner shell 16 moves up, thereby further absorbing the impact force, thereby preventing the capacitor body 11 from exploding, and protecting the capacitor body 11 and the explosion-proof outer shell 14 from damage.

[0038] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A safety capacitor with explosion-proof function, characterized by: The explosion-proof assembly (1) comprises a capacitor body (11), an explosion-proof seat (12), an externally threaded cylinder (13), an explosion-proof outer shell (14), a buffer spring (15), an explosion-proof inner shell (16), a buffer cavity (17), an explosion-proof membrane (18), an explosion-proof hole (19) and an explosion-proof groove (20); The bottom of the capacitor body (11) is fixedly connected to an explosion-proof seat (12); an external threaded tube (13) is welded to the upper surface of the explosion-proof seat (12) near the outer side of the capacitor body (11); the inner side wall of the external threaded tube (13) is fixedly connected to the bottom of the outer side wall of the capacitor body (11); the outer side wall of the external threaded tube (13) is threadedly connected to an explosion-proof housing (14); the inner top wall of the explosion-proof housing (14) is fixedly connected to a buffer spring (15); the bottom of the buffer spring (15) is fixedly connected to an explosion-proof inner housing (16); the outer side wall of the explosion-proof inner housing (16) is slidably connected to the explosion-proof housing ( The inner wall of the explosion-proof inner shell (14) is connected to the inner wall of the explosion-proof inner shell (16), the outer wall of the capacitor body (11) is slidably connected to the lower part of the inner wall of the explosion-proof inner shell (16) near the upper part of the external threaded tube (13), the lower surface of the explosion-proof inner shell (16) is fitted and connected to the upper surface of the external threaded tube (13), the inner wall of the explosion-proof inner shell (16) is provided with a buffer cavity (17) near the upper part of the capacitor body (11), the upper surface of the capacitor body (11) is provided with an explosion-proof membrane (18), the center of the upper surface of the explosion-proof membrane (18) is provided with an explosion-proof hole (19), and the inner wall of the explosion-proof hole (19) is provided with a plurality of explosion-proof grooves (20) around the inner wall.

2. The explosion-proof safety capacitor according to claim 1, characterized in that: An exhaust hole (21) is provided at the center of the upper surface of the explosion-proof housing (14).

3. The explosion-proof safety capacitor according to claim 1, characterized in that: A limiting ring (22) is welded to the outer wall of the explosion-proof seat (12), and the outer side of the upper surface of the limiting ring (22) is closely connected to the outer side of the lower surface of the explosion-proof housing (14).

4. The explosion-proof safety capacitor according to claim 3, characterized in that: A sealing ring (23) is fixedly connected to the inner side of the upper surface of the limiting ring (22), a sealing groove (24) is provided on the inner side of the lower surface of the explosion-proof housing (14), and the outer side wall of the sealing ring (23) is closely connected to the inner side wall of the sealing groove (24).

5. The explosion-proof safety capacitor according to claim 1, characterized in that: Connecting pins (25) are provided on both sides of the lower surface of the capacitor (11).

6. The explosion-proof safety capacitor according to claim 5, characterized in that: Through holes (26) are provided on both sides of the lower surface of the explosion-proof seat (12); an insulating sleeve (27) is fixedly connected to the inner wall of the through hole (26); and the top of the outer wall of the connecting pin (25) is fitted and connected to the inner wall of the insulating sleeve (27).

7. The explosion-proof safety capacitor according to claim 1, characterized in that: The upper portion of the outer side wall of the explosion-proof housing (14) is provided with anti-slip grooves (28).

8. The explosion-proof safety capacitor according to claim 2, characterized in that: A protective film (29) is fixedly connected to the inner wall of the exhaust hole (21).

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