CN219979342U - Explosion-proof shell of power capacitor - Google Patents

Abstract

The utility model is suitable for the technical field of power capacitors, and provides an explosion-proof shell of a power capacitor, which comprises an outer shell, an inner shell and a capacitor main body, wherein the capacitor main body is arranged in the inner shell, meanwhile, an air storage cavity in the inner shell is filled with inert gas to prevent an electric container from burning when overheated and on fire, and an explosion-proof membrane is arranged on the inner wall of the inner shell to improve the structural strength of the inner shell; the outer shell is abutted against the outer walls of the two sides of the inner shell through the supporting plates and the supporting frames, so that the inner shell is fixed, meanwhile, radiating fins are arranged on the two supporting plates, the contact area between the inner shell and air is improved by utilizing the radiating fins, the heat dissipation performance of the inner shell and the capacitor main body is improved, and the service life of the capacitor main body is prolonged; and a plurality of buffer devices are all installed on the both sides inner wall of shell body, utilize buffer spring in the buffer device, slow down the vibrations in inner shell body and the transportation of condenser main part, prevent to receive the explosion that bumps into, the security is higher.

Description

Explosion-proof shell of power capacitor

Technical Field

The utility model belongs to the technical field of power capacitors, and particularly relates to an explosion-proof shell of a power capacitor.

Background

In the current power capacitor technology field, power capacitors are used for capacitors of power systems and electrical equipment. Any two metal conductors are separated by an insulating medium, and a capacitor is formed. The capacitance of the capacitor is determined by its geometry and the characteristics of the dielectric medium between the plates. When a capacitor is used at an ac voltage, the capacity of the capacitor is often expressed in terms of its reactive power, in units of either a depletion or a kilodepletion.

The utility model patent with publication number CN205354872U discloses an explosion-proof shell of a capacitor, the top of the capacitor cylinder is sealed, the bottom of the capacitor cylinder is provided with an opening, the side wall of the opening is provided with an inward curled edge, a capacitor bottom cover is clamped in the curled edge, the edge of the bottom cover is provided with a limit flange, the limit flange and the curled edge are mutually buckled, and the inner wall of the capacitor cylinder is provided with an electric element positioning plate. The top of the capacitor shell is sealed, the bottom of the capacitor shell is provided with an opening, the side wall of the opening is provided with an inward curled edge, the capacitor bottom cover is clamped in the curled edge, the edge of the bottom cover is provided with a limit flange, and the flange is fastened with the curled edge, so that a positioning plate is arranged on the inner wall of the capacitor shell and used for fixing an electric element in the capacitor, and therefore, after the capacitor is damaged due to expansion, the capacitor shell can be continuously used as long as the bottom cover is replaced.

However, the above patent suffers from the following disadvantages:

1. after the expansion of the capacitor is damaged, the capacitor shell can be continuously used as long as the bottom cover is replaced, but the capacitor is easy to burn after explosion, so that the safety is poor.

2. The capacitor disclosed in the patent and the common capacitor is easy to collide during transportation, so that liquid in the capacitor main body leaks, and the service life of the capacitor is reduced.

Disclosure of Invention

The utility model provides an explosion-proof shell of a power capacitor, which aims to solve the problems that the capacitor mentioned in the background is easy to burn after explosion, has poor safety and is easy to leak when being knocked.

The utility model is realized in that the explosion-proof shell of the power capacitor comprises an outer shell, an inner shell and a capacitor main body;

the capacitor main body is fixedly arranged in the inner shell, an explosion-proof membrane is arranged on the inner wall of the inner shell, a gas storage cavity is arranged in the inner shell, and inert gas is filled in the gas storage cavity;

two pins are arranged on the capacitor main body and are arranged on the outer wall of the outer shell;

the inner shell is arranged in the outer shell, the outer shell comprises a lower shell and an upper shell, and the lower shell is detachably connected with the upper shell; in this scheme, install the condenser in the circuit through the stitch, when the electric container explodes simultaneously, the inside inert gas of gas storage chamber prevents that inner shell from taking place to burn, and the security is higher.

Preferably, a clamping piece is arranged at the lower end of the upper shell, and a clamping groove matched with the clamping piece is formed in the lower shell; in the scheme, the upper casing is clamped with the clamping groove through the clamping piece, so that the upper casing and the lower casing are convenient to detach.

Preferably, an installation cavity is formed in the lower casing, a plurality of supporting frames are installed on the inner walls of the two sides of the installation cavity, two supporting plates are installed on the supporting frames, and the two supporting plates are abutted against the inner walls of the two sides of the inner casing;

a plurality of radiating fins are arranged on the outer walls of the two supporting plates, and the radiating fins are uniformly distributed on the outer walls of the supporting plates; in this scheme, a plurality of radiating fins improve the radiating area of backup pad, and then improve the radiating efficiency of inner housing and condenser main part.

Preferably, a plurality of buffer devices are arranged on the inner walls of the two sides of the installation cavity, and the buffer devices are uniformly distributed on the inner walls of the two sides of the installation cavity; in this scheme, the vibration that the inner shell received is slowed down through the outer wall of buffer conflict inner shell.

Preferably, the buffer device comprises a fixed seat, the fixed seat is fixedly arranged on the inner wall of the mounting cavity, a first fixed groove is formed in the fixed seat, and a buffer spring is fixedly arranged on the inner wall of the first fixed groove;

one end of the buffer spring is fixedly connected with the fixed seat, the other end of the buffer spring is fixedly connected with the supporting seat, a second fixing groove is formed in the supporting seat, and the buffer spring is arranged in the second fixing groove;

the supporting seat is abutted against the outer wall of the inner shell; when the supporting seat is extruded in the scheme, the supporting seat extrudes the buffer spring, the buffer spring rebounds through the elasticity of the buffer spring, and the vibration received by the supporting seat is delayed, so that the vibration received by the inner shell is slowed down.

Preferably, a plurality of strip-shaped radiating holes are formed in the inner walls of the two sides of the lower shell, and the radiating holes are uniformly distributed on the outer walls of the two sides of the lower shell; in the scheme, the plurality of strip-shaped radiating holes improve the air fluidity of the lower shell and improve the radiating efficiency of the lower shell.

Preferably, the inner walls of the lower shell and the upper shell are respectively provided with a fireproof layer; in this scheme, improve the fire resistance of lower casing and last casing through the flame retardant coating, prevent that outer shell from taking place to burn.

Compared with the prior art, the utility model has the beneficial effects that: the utility model relates to an explosion-proof shell of a power capacitor,

1. the capacitor main body is arranged in the inner shell, meanwhile, the gas storage cavity in the inner shell is filled with inert gas to prevent the electric container from burning when overheated and on fire, and the inner wall of the inner shell is provided with an explosion-proof film to improve the structural strength of the inner shell;

2. the outer shell is abutted against the outer walls of the two sides of the inner shell through the supporting plates and the supporting frames, so that the inner shell is fixed, meanwhile, radiating fins are arranged on the two supporting plates, the contact area between the inner shell and air is improved by utilizing the radiating fins, the heat dissipation performance of the inner shell and the capacitor main body is improved, and the service life of the capacitor main body is prolonged;

3. a plurality of buffer devices are arranged on the inner walls of the two sides of the outer shell, and buffer springs in the buffer devices are utilized to slow down vibration in transportation of the inner shell and the capacitor main body, so that the explosion caused by collision is prevented, and the safety is higher.

Drawings

FIG. 1 is a schematic view of the whole structure of the present utility model

FIG. 2 is an enlarged view of the utility model at A in FIG. 1

Fig. 3 is a schematic view of the structure of the outer shell of the present utility model

Fig. 4 is a front view of the outer shell of the present utility model

In the figure: 1. an outer housing; 11. a lower case; 111. a mounting cavity; 112. a heat radiation hole; 113. a clamping groove; 12. an upper housing; 121. a clamping piece; 13. a fire-blocking layer; 14. a support plate; 141. a heat radiation fin; 15. a support frame; 16. a buffer device; 161. a fixing seat; 162. a first fixing groove; 163. a support base; 164. a second fixing groove; 165. a buffer spring;

2. an inner housing; 21. an explosion-proof membrane; 22. a gas storage chamber;

3. a capacitor body; 31. and (5) stitching.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown.

The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model.

All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1-4, the present utility model provides a technical solution: the utility model provides a power capacitor explosion-proof housing, includes shell body 1, inner shell body 2 and condenser main part 3, and inside shell body 2 is including condenser main part 3 fixed mounting, is provided with rupture membrane 21 on the inner wall of inner shell body 2, and is provided with gas storage chamber 22 in the inner shell body 2, and the gas storage chamber 22 intussuseption is filled with inert gas, is provided with two pins 31 on the condenser main part 3, and two pins 31 are installed on the outer wall of shell body 1.

Wherein, the explosion-proof film 21 on the inner wall of the inner shell 2 can be a metal PTE explosion-proof film, which can prevent the inner shell 2 from being damaged when the capacitor main body 3 explodes, and meanwhile, the inert gas in the gas storage cavity 22 is not easy to burn, so that the explosion can be prevented when the capacitor main body 3 generates sparks.

The inner shell 2 is arranged in the outer shell 1, the outer shell 1 comprises a lower shell 11 and an upper shell 12, the lower shell 11 is detachably connected with the upper shell 12, a clamping piece 121 is arranged at the lower end of the upper shell 12, and a clamping groove 113 matched with the clamping piece 121 is formed in the lower shell 11.

Wherein, upper casing 12 passes through fastener 121 joint draw-in groove 113, and upper casing 12 and lower casing 11 of convenient to detach inspect change capacitor body 3.

The inside of lower casing 11 is provided with installation cavity 111, all installs a plurality of support frames 15 on the both sides inner wall of installation cavity 111, installs two backup pads 14 on a plurality of support frames 15, and two backup pads 14 conflict the both sides inner wall of interior casing 2, all install a plurality of fin 141 on the outer wall of two backup pads 14, and a plurality of fin 141 equipartitions are on the outer wall of backup pad 14.

In addition, the supporting plates 14 are abutted against the inner walls of the two sides of the inner shell 2, so that the inner shell 2 is fixed, the inner shell 2 is prevented from loosening, the plurality of radiating fins 141 can be aluminum fins, the radiating efficiency of the capacitor main body 3 is further improved, and explosion is not easy to occur.

A plurality of buffer devices 16 are installed on the inner walls of the two sides of the installation cavity 111, the buffer devices 16 are uniformly distributed on the inner walls of the two sides of the installation cavity 111, each buffer device 16 comprises a fixed seat 161, the fixed seats 161 are fixedly installed on the inner walls of the installation cavity 111, a first fixed groove 162 is formed in each fixed seat 161, a buffer spring 165 is fixedly installed on the inner wall of each first fixed groove 162, one end of each buffer spring 165 is fixedly connected with the fixed seat 161, the other end of each buffer spring is fixedly connected with a supporting seat 163, a second fixed groove 164 is formed in each supporting seat 163, each buffer spring 165 is arranged in each second fixed groove 164, and each supporting seat 163 abuts against the outer wall of the inner shell 2.

In addition, the supporting seats 163 of the plurality of cushioning devices 16 support the inner housing 2, when the inner housing 2 is vibrated, the supporting seats 163 are pushed, the supporting seats 163 push the cushioning springs 165, and the vibration force is reduced by the elasticity of the cushioning springs 165, so that the stability of the capacitor main body 3 is improved.

A plurality of strip-shaped radiating holes 112 are formed in the inner walls of the two sides of the lower shell 11, the radiating holes 112 are uniformly distributed on the outer walls of the two sides of the lower shell 11, and fireproof layers 13 are arranged on the inner walls of the lower shell 11 and the upper shell 12.

Further, the plurality of elongated heat dissipating holes 112 increase the air flow velocity inside the lower housing 11, and the fireproof layers 13 on the lower housing 11 and the upper housing 12 may be epoxy-expanded epoxy paint, improving the fireproof performance of the lower housing 11 and the upper housing 12.

The working principle and the using flow of the utility model are as follows: referring to fig. 1 to 4, the capacitor body 3 is installed inside the inner housing 2, the explosion-proof membrane 21 on the inner wall of the inner housing 2 prevents the inner housing 2 from being damaged when the capacitor body 3 explodes, meanwhile, the inert gas inside the gas storage cavity 22 is not easy to burn, explosion occurs when the capacitor body 3 can be prevented from generating sparks, the inner housing 2 is supported by the supporting seats 163 of the plurality of buffering devices 16, when the inner housing 2 is vibrated, the supporting seats 163 are pushed, the supporting seats 163 push the buffering springs 165, the elastic and vibration-reducing forces of the buffering springs 165 are utilized, and the supporting plates 14 are abutted against the inner walls on two sides of the inner housing 2, so that the inner housing 2 is fixed, the inner housing 2 is prevented from loosening, and the plurality of radiating fins 141 can be aluminum fins, so that the radiating efficiency of the capacitor body 3 is further improved.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (7)

1. An explosion-proof shell of a power capacitor is characterized in that: comprises an outer shell (1), an inner shell (2) and a capacitor main body (3);

the capacitor body (3) is fixedly arranged in the inner shell (2), an explosion-proof membrane (21) is arranged on the inner wall of the inner shell (2), an air storage cavity (22) is arranged in the inner shell (2), and inert gas is filled in the air storage cavity (22);

two pins (31) are arranged on the capacitor main body (3), and the two pins (31) are arranged on the outer wall of the outer shell (1);

the inner shell (2) is arranged in the outer shell (1), the outer shell (1) comprises a lower shell (11) and an upper shell (12), and the lower shell (11) is detachably connected with the upper shell (12).

2. A power capacitor explosion-proof housing as set forth in claim 1, wherein: the lower end of the upper casing (12) is provided with a clamping piece (121), and the lower casing (11) is provided with a clamping groove (113) matched with the clamping piece (121).

3. A power capacitor explosion-proof housing as set forth in claim 1, wherein: the inner part of the lower shell (11) is provided with an installation cavity (111), a plurality of supporting frames (15) are installed on the inner walls of the two sides of the installation cavity (111), two supporting plates (14) are installed on the supporting frames (15), and the two supporting plates (14) are abutted against the inner walls of the two sides of the inner shell (2);

a plurality of radiating fins (141) are arranged on the outer walls of the two supporting plates (14), and the radiating fins (141) are uniformly distributed on the outer walls of the supporting plates (14).

4. A power capacitor explosion-proof housing as set forth in claim 3, wherein: a plurality of buffer devices (16) are arranged on the inner walls of the two sides of the mounting cavity (111), and the buffer devices (16) are uniformly distributed on the inner walls of the two sides of the mounting cavity (111).

5. A power capacitor explosion-proof housing as set forth in claim 4, wherein: the buffer device (16) comprises a fixed seat (161), the fixed seat (161) is fixedly arranged on the inner wall of the mounting cavity (111), a first fixing groove (162) is formed in the fixed seat (161), and a buffer spring (165) is fixedly arranged on the inner wall of the first fixing groove (162);

one end of the buffer spring (165) is fixedly connected with the fixed seat (161), the other end of the buffer spring is fixedly connected with the supporting seat (163), a second fixed groove (164) is formed in the supporting seat (163), and the buffer spring (165) is arranged in the second fixed groove (164);

the supporting seat (163) is abutted against the outer wall of the inner shell (2).

6. A power capacitor explosion-proof housing as set forth in claim 1, wherein: a plurality of strip-shaped radiating holes (112) are formed in the inner walls of the two sides of the lower shell (11), and the radiating holes (112) are uniformly distributed on the outer walls of the two sides of the lower shell (11).

7. A power capacitor explosion-proof housing as set forth in claim 1, wherein: and fireproof layers (13) are arranged on the inner walls of the lower casing (11) and the upper casing (12).