CN210443435U - Explosion-proof polypropylene film capacitor - Google Patents

Abstract

The utility model discloses an explosion-proof type polypropylene film capacitor, including seal housing and explosion-proof valve, explosion-proof valve includes a sealing cylinder and sealing plug, first seal groove has been seted up to the inner wall of a sealing cylinder, the through-hole has been seted up to the center department of sealing plug, is provided with sealed guide pillar in the through-hole, the top of sealed guide pillar is fixed with the closing plate, the bottom mounting of sealed guide pillar has the piston board, flexible groove has been seted up to the both sides that lie in sealed guide pillar in the sealing plug, flexible inslot is fixed with the accessory plate, has seted up the through hole on the accessory plate, slide in the flexible inslot and be provided with the movable plate, be fixed with on the movable plate with first seal groove assorted bolt, the movable plate passes through fastening spring and is connected with the accessory plate, be fixed with the cable wire on.

Description

Explosion-proof polypropylene film capacitor

Technical Field

The utility model relates to an explosion-proof type polypropylene film capacitor belongs to capacitor equipment technical field.

Background

The capacitor air hole nut commonly used in the market at present is used as an inlet and outlet channel of internal filling materials and only has a simple sealing effect. As shown in fig. 1, the conventional capacitor vent nut is composed of a nut plug 9, a nut sleeve 10, and a sealing material 11. The nut plug 9 and the nut sleeve 10 are matched by screw threads. In actual use, after the filling of the internal filling material of the capacitor is completed through the air hole nut, the nut plug 9 provided with the sealing member 11 is screwed into the nut sleeve 10 and tightened.

The vent nut, once tightened, is integral with the capacitor housing. If the internal pressure of the capacitor is increased, the pressure can be released only when the internal pressure reaches a certain degree and the weak point in the whole shell is damaged. Once the situation happens, accidents easily occur, and potential safety hazards exist.

Disclosure of Invention

An object of the utility model is to provide an explosion-proof type polypropylene film capacitor to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an explosion-proof type polypropylene film capacitor includes seal housing and explosion-proof valve, explosion-proof valve includes a sealing barrel and sealing plug, first seal groove has been seted up to the inner wall of a sealing barrel, the through-hole has been seted up to the center department of sealing plug, is provided with sealed guide pillar in the through-hole, the top of sealed guide pillar is fixed with the closing plate, the bottom mounting of sealed guide pillar has the piston board, flexible groove has been seted up to the both sides that lie in sealed guide pillar in the sealing plug, flexible inslot is fixed with the accessory plate, has seted up the through hole on the accessory plate, slide in the flexible groove and be provided with the movable plate, be fixed with on the movable plate with first seal groove assorted bolt, the movable plate passes fastening spring and is connected with the accessory plate, be fixed with the.

Preferably, the top of sealing plug has seted up the second seal groove, sealed cotton pad has been laid in the second seal groove, the bottom of closing plate is fixed with all around with second seal groove assorted sealing ring.

Preferably, a hollow cavity is arranged in the sealing guide pillar, air guide holes are formed in the peripheral side wall of the hollow cavity, and the air guide holes are also formed in the bottom contact surface of the piston plate and the sealing guide pillar.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model relates to an explosion-proof polypropylene film capacitor, the utility model has simple structure, convenient use, good sealing performance and explosion-proof function, and avoids the capacitor from being damaged due to overlarge internal air pressure; when the sealing device is used, when the air pressure in the capacitor is too high, the piston plate can be pushed to move upwards, the piston plate drives the sealing guide post to move upwards, the sealing guide post drives the sealing plate to move upwards so that the sealing ring is separated from the second sealing groove, the sealing guide post is convenient to seal and the sealing plug moves out, and when part of the sealing guide post moves out of the sealing plug, redundant air in the capacitor can be discharged through the air guide hole, so that a preliminary pressure relief effect is achieved; when the sealed guide pillar upward movement, thereby can drive the bolt motion through the cable wire and make its and the separation of first seal groove realize the separation of sealing plug and sealing cylinder, when the inside atmospheric pressure of condenser further strengthens, the piston board can be with whole sealing plug jack-up to play further pressure release effect, avoid the condenser to appear explosion function because of inside pressure is too big.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is an enlarged view of a portion a in fig. 1.

In the figure: 1. sealing the housing; 2. an explosion-proof valve; 3. a sealing cylinder; 301. a first seal groove; 4. a sealing plug; 401. a telescopic groove; 402. a second seal groove; 5. sealing the guide post; 501. a hollow chamber; 502. an air vent; 6. a sealing plate; 7. a piston plate; 8. an auxiliary plate; 801. a through hole; 9. moving the plate; 10. a bolt; 11. a fastening spring; 12. a steel cord; 13. and (4) a sealing ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1-2, the present invention provides a technical solution: an explosion-proof type polypropylene film capacitor is characterized in that: the explosion-proof valve comprises a sealing shell 1 and an explosion-proof valve 2, wherein the explosion-proof valve 2 comprises a sealing cylinder 3 and a sealing plug 4, and the sealing cylinder 3 is fixed at the center of the top of the sealing shell 1; the inner wall of the sealing barrel 3 is provided with a first sealing groove 301, the center of the sealing plug 4 is provided with a through hole, a sealing guide pillar 5 is arranged in the through hole, a sealing plate 6 is fixed at the top end of the sealing guide pillar 5, a piston plate 7 is fixed at the bottom end of the sealing guide pillar 5, telescopic grooves 401 are formed in two sides of the sealing plug 4, which are located on the sealing guide pillar 5, an auxiliary plate 8 is fixed in each telescopic groove 401, a through hole 801 is formed in the auxiliary plate 8, a moving plate 9 is slidably arranged in each telescopic groove 401, a plug pin 10 matched with the first sealing groove 301 is fixed on the moving plate 9, the moving plate 9 is connected with the auxiliary plate 8 through a fastening spring 11, a steel cable 12 is fixed on the moving plate 9, and the steel cable 12 penetrates through.

Further, a second sealing groove 402 is formed in the top of the sealing plug 4, a sealing cotton pad is laid in the second sealing groove 402, and a sealing ring 13 matched with the second sealing groove 402 is fixed around the bottom of the sealing plate 6.

Further, a hollow cavity 501 is arranged in the sealing guide pillar 5, air guide holes 502 are formed in the peripheral side wall of the hollow cavity 501, and the air guide holes 502 are also formed in the contact surface of the piston plate 7 and the bottom of the sealing guide pillar 5.

The working principle is as follows: the utility model relates to an explosion-proof type polypropylene film capacitor, during the use, can promote piston plate 7 to move upwards when condenser inside atmospheric pressure is too big, piston plate 7 drives sealed guide pillar 5 and moves upwards, sealed guide pillar 5 drives closing plate 6 and moves upwards and make sealing ring 13 separate with second seal groove 402, thereby be convenient for sealed guide pillar 5 and thus sealing plug 4 internal motion go out, when partial sealed guide pillar 5 moved out from sealing plug 4 internal motion, the unnecessary gas in the condenser can be discharged through gas guide hole 502, play preliminary pressure release effect; when the sealing guide pillar 5 moves upwards, the steel cable 12 drives the bolt 10 to move so that the bolt is separated from the first sealing groove 301, so that the sealing plug 4 is separated from the sealing cylinder 3, when the internal air pressure of the capacitor is further enhanced, the piston plate 7 can jack up the whole sealing plug 4, further pressure relief effect is achieved, and the explosion function of the capacitor due to overlarge internal pressure is avoided.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (3)

1. An explosion-proof type polypropylene film capacitor is characterized in that: the explosion-proof valve comprises a sealing shell (1) and an explosion-proof valve (2), wherein the explosion-proof valve (2) comprises a sealing cylinder (3) and a sealing plug (4), and the sealing cylinder (3) is fixed at the center of the top of the sealing shell (1); the inner wall of the sealing barrel (3) is provided with a first sealing groove (301), the center of the sealing plug (4) is provided with a through hole, a sealing guide pillar (5) is arranged in the through hole, a sealing plate (6) is fixed at the top end of the sealing guide pillar (5), a piston plate (7) is fixed at the bottom end of the sealing guide pillar (5), telescopic grooves (401) are formed in the two sides of the sealing plug (4) which are positioned on the sealing guide pillar (5), auxiliary plates (8) are fixed in the telescopic grooves (401), through holes (801) are formed in the auxiliary plates (8), a movable plate (9) is arranged in the telescopic grooves (401) in a sliding mode, a bolt (10) matched with the first sealing groove (301) is fixed on the movable plate (9), the movable plate (9) is connected with the auxiliary plates (8) through a fastening spring (11), and a steel cable (12) is fixed on, the steel cable (12) passes through the through hole (801) and is connected with the sealing guide post (5).

2. An explosion proof type polypropylene film capacitor as claimed in claim 1, wherein: the top of sealing plug (4) has been seted up second seal groove (402), sealed cotton pad has been laid in second seal groove (402), be fixed with all around the bottom of closing plate (6) with second seal groove (402) assorted sealing ring (13).

3. An explosion proof type polypropylene film capacitor as claimed in claim 1, wherein: a hollow cavity (501) is arranged in the sealing guide pillar (5), air guide holes (502) are formed in the peripheral side wall of the hollow cavity (501), and the air guide holes (502) are also formed in the bottom contact surface of the piston plate (7) and the sealing guide pillar (5).

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