JP2538832Y2 - High pressure cutout for salt tolerance - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an improvement of a salt-resistant high-pressure cutout, and more particularly to a fouling prevention cover for sealing a gap at a lower end opening formed by a lid insulator and a main body insulator. Things.

[Conventional technology]

The salt-resistant high-pressure cutout used in salt-hazardous areas such as the seashore has a fouling prevention cover for preventing the penetration of conductive particles so that the inside of the insulator is not fouled by the adhesion of conductive particles such as salt. The lower side is referred to as the lower end in the mounting state shown in FIG. 2, and the lower side is referred to as a lower end.) In this type of conventional antifouling cover, the supporting insulator and the main body insulator of the rotating portion of the lid insulator are provided. There is a gap between
The gap is not completely sealed.

[Problems to be solved by the invention]

As in the above-described conventional structure, in a portion where the antifouling cover is present and a gap is provided between the lid insulator and the main body insulator, dirt particles enter through the gap. As a result, the leakage current increases due to internal fouling, resulting in burnout of the rubber packing and the fuse cylinder, and further, thermal breakage of the insulator main body.

The purpose of the present invention is to solve the above problems.

[Means for solving the problem]

In order to solve the above-mentioned problem, the first invention is to form an opening (1p) for projecting a fuse cylinder at a lower end of a main body insulator (1), and to form a cover outside the opening (1p). Insulator (44)
The support insulator portion (44a) is provided, and in the gap (g) between the main body insulator (1) and the support insulator portion (44a), the support insulator portion (44a) is attached to the main body insulator (1) and is separated from the main body insulator (1). The rainwater blocking part (52c) protruding toward the outer surface of the main body insulator (1) and the supporting insulator part (44a) is closely adhered to these outer surfaces (g).
A fouling prevention cover composed of a shielding part (52e) for shielding the door, wherein the shielding part (52e) is formed in a U-shaped support part (52a) and an inverted U shape outside the support part (52a). And the shielding part (52b).
e) is formed integrally with the rainwater blocking part (52c), and the rainwater blocking part (52c) is fixed to the main body insulator (1) with fastening pins (53), and the U-shaped support in the blocking part (52e) is formed. The part (52a) is fitted and fixed to the protruding wall (1r) formed on the main body insulator (1) in the opening (1p), and the tongue piece (52b) is attached to the lid insulator (44).
Characterized in that it is brought into close contact with the outer surface of the supporting insulator (44a).

The second invention is that the shielding portion (52e) is composed of a U-shaped support portion (52a) and an inverted U-shaped shielding tongue piece (52b) formed outside the support portion (52a). The rainwater blocking portion (52e) is formed separately from the rainwater blocking portion (52c), and the rainwater blocking portion (52c) is fixed to the main body insulator (1) with a fastening pin (53). The U-shaped support part (52a) of the shielding part (52e) is fitted and fixed to the protruding wall (1r) formed in the main body insulator (1) at the opening part (1p), and the tongue piece (52b) is closed. The insulator (44) is characterized in that it is closely attached to the outer surface of the support insulator (44a).

〔Example〕

Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. Reference numeral 1 denotes a body insulator, and an upper concave portion 1a
Accommodates an upper arc extinguishing device 2. Upper arc extinguishing device 2
Consists of an upper fixed electrode 3, an upper arc-extinguishing chamber 4, an electric wire connection terminal 5, and a conductive fitting 6. Reference numeral 1b denotes a lower concave notch, in which a lower arc extinguishing device 7 is housed. The device 7 includes a lower fixed electrode 8, a lower arc extinguishing chamber 9, a wire connection terminal 10, and a conductive fitting 11.
Consists of Reference numeral 12 denotes a lightning arrester housed in the central recess 1c and the housing 1d. The lightning arrester 12 includes a series gap 13 and a non-linear resistance element 14, and the series gap 13 further includes a main body insulator 1.
The insulating spacer 15 is integrally fixed to the spacer fixing portion 1e with a glass frit. The series gap 13 includes the insulating spacer 15, the charging-side discharge electrode 16, and the ground-side discharge electrode 17, and both ends of the spacer 15 are hermetically held by cap portions 16a, 17a of the discharge electrodes 16, 17. I have. G indicates a discharge gap. The voltage non-linear resistance element 14 is formed in a cylindrical shape, is housed in a protection tube 18 made of FRP resin, and is electrically connected to the series gap 13 in series. 19 is a rubber tube for buffer, 20
Is an insulating collar, 21 is a filler made of an insulating material made of silicone resin also serving as a cushioning member, 22 is a pressure release hole 22a formed at the center, and is connected to a screw portion 18a on the upper end side of the protective cylinder 18 by screwing. The cap fitting 23 is a connection cap fitting similarly screwed to the screw portion 18b on the lower end side. The storage portion 1d is formed continuously with the central recessed portion 1c, and a cap metal fitting 24 is crimped to the opening 1f at the upper end thereof to seal the same portion 1f. Incidentally, when the element 14 is externally enveloped due to an abnormal voltage exceeding the discharge withstand voltage, the pressure in the hole 18c increases due to the generated arc, the closing plate 25 comes off, and the pressure in the space a also increases. Immediately, the cap fitting 24 comes off, and the pressure is released to the outside. 26 is a ground terminal fixedly connected to the cap fitting 24, 28 is an O-ring, 29 is a coil spring interposed between the cap fitting 24 and the closing plate 25. Numeral 30 is a buffer body having a substantially lotus root cross-section, which is intended to prevent the series gap 15 from being scattered outside even if the insulating gaper 15 is broken in the case of a subsequent flow. For example, it is made of polyethylene resin.
Reference numeral 31 denotes a stopper, which is located outside the buffer body 30 for fixing the buffer body 30, the locking portion 31a of which is fixed to the recess 1g of the inner wall, and the stopper is an FRP having excellent mechanical strength. And made of polyacetal resin. Reference numeral 32 denotes a filler made of an insulating material made of silicone resin (rubber) having flexibility. Reference numeral 33 denotes a connection conductive plate that connects between the charging-side discharge electrode 16 and the lower fixed electrode 8. Reference numeral 34 denotes a deep groove-shaped support insulator fixed by a support bolt 35 fixed to the upper surface 1h of the main body insulator 1, and an insulator between a charged portion (wire connection terminal) of the insulator and a ground (ground terminal / mounting bracket). Is intended to increase the creepage distance. The support bolt 35 is made of an adhesive 36 and the body insulator 1
It is stuck to. Reference numerals 1j, 1k, and 1m denote flange portions for increasing the creepage distance of the main body insulator 1. Reference numeral 37 denotes a band fitting, which clamps the outer peripheral surface of the housing portion 1d projecting from the center of the main body insulator 1 and has an elongated mounting hole 37a formed at the supporting insulator 34 portion. On the upper surface 34b side of the support insulator 34, a support bolt 39 is fixedly projected with an adhesive 38, and is protruded therefrom.
a is inserted. The band fitting 37 and the support bolt 39 are connected to each other by an elastic fastening member 39a inserted through the support bolt 39.
And a washer 39b and a retaining pin 39c. Further, as shown in FIG. 2, the band fitting 37 is connected to the mounting fitting 40 by bolts 41 and nuts 42. With this mounting bracket 40, the cutout A composed of the main body insulator 1 and the like is mounted on the arm 43 of the utility pole in the state shown in FIG.

44 is a lid insulator, and a shaft pin 45b provided on the support insulator portion 44a.
Thereby, it is pivotally mounted on the body insulator 1 so as to be freely opened and closed. 45
Is a fuse cylinder which is detachably attached to the lid insulator 44 via removable metal fittings 46 and 47, and an upper movable electrode 48 of the fuse cylinder 45.
Contacts the upper fixed electrode 3 on the body insulator side when the lid insulator is closed, and the lower movable electrode 49 also contacts the lower fixed electrode 8 on the body insulator side to form a closed circuit. 50 is a fuse electrically interposed between the upper movable electrode 48 and the lower movable electrode 49, and 51 is a rubber packing interposed at a fitting portion between the lid insulator 44 and the main body insulator 1, and is provided with a gap formed at the fitting portion. It is sealed to prevent the entry of fouling particles.
Adhered to.

Reference numeral 52 denotes a stain prevention cover provided outside the opening 1p for projecting the fuse cylinder of the main body insulator, which is formed of a rubber material. It is particularly preferable to use EPT having tracking resistance and elasticity. The antifouling cover 52 is a rainwater blocking part 52c.
And the outer surface of the support insulator portion 44 of the lid insulator 44 and the body insulator 1
And a shielding part 52e for shielding a gap g with the outer surface of the light emitting element. The shielding portion 52e has a U-shaped cross-section that fits into a protruding wall 1r formed on the main body insulator 1 in a gap g between the lid insulator 44 and the main body insulator 1, and has a semicircular outer shape. And the supporting part 5
A tongue piece 52b having an inverted U-shape and a semicircular outer shape bent in the opposite direction to the support portion 52a on the outside of 2a. The rainwater blocking portion 52c is formed so as to protrude outward from the main body insulator 1, and has two pin holes 52d for fastening the cover 52 to the main body insulator 1. . Then, the support portion 52a is press-fitted and fixed to the protruding wall 1r, or is fixedly fitted using an adhesive, and the pin hole 52 is fixed.
A pin 53 is inserted through d, the pin 53 is fitted into a mounting hole 54 formed in the main body insulator 1 and fixed with an adhesive 54a, and the stain prevention cover 52 is fixed to the main body insulator 1. With this installation,
The tongue piece 52b formed on the fouling prevention cover 52 is brought into close contact with the outer surface of the lid insulator 44 by its elastic force, so that the main body insulator 1 and the lid insulator 44 are formed.
To prevent the intrusion of fouling particles such as rainwater from the gap g. Also, the rainwater blocking portion 52c protruding to the outside blocks rainwater flowing along the outer surface of the main body insulator from directly entering the main body insulator or the fuse cylinder.

7 to 9 show a second embodiment of the present invention.

That is, the antifouling cover 52 in the above-described embodiment,
In this structure, a shielding part 52e in which a support part 52a and a tongue piece 52b are integrally formed, and a rainwater shielding part 52c are formed separately. Other structures are the same as those of the above embodiment.

FIG. 10 shows a third embodiment of the present invention.
In the antifouling cover 52 in the embodiment, the U-shaped support portion 52a is eliminated, and the tongue piece 52b is held by the fastening pin 53 together with the rainwater blocking portion 52c. Other structures are the same as in the first embodiment.

[Effect of the invention]

As described above, according to the present invention, it is possible to prevent rainwater flowing along the outer surface of the main body insulator from directly entering the main body insulator or the fuse cylinder by the rainwater cutoff part (52c), Since the gap between the main insulator and the support insulator of the lid insulator can be closed by 52e), intrusion of the conductive particles into the main insulator can be reliably prevented. Further, by forming the shielding part (52e) on the tongue piece (52b), the tongue piece (52b) elastically adheres to the supporting insulator part (44a) of the lid insulator (44),
The gap is reliably sealed, so that intrusion of the conductive particles can be reliably prevented. In addition, the rainwater blocking part (52c) and the shielding part (52e)
And the rainwater blocking part (52c) with the fixing pin (5
By fixing by 3) and fitting and fixing the shielding part (52e) to the insulator part of the main body, the antifouling cover is double-mounted and can be securely mounted.

[Brief description of the drawings]

1 to 6 show a first embodiment of the present invention.
FIG. 1 is a longitudinal sectional view of a salt-resistant high-pressure cutout to which the present invention is applied, FIG. 2 is a side view showing an attached state of the cutout, FIG. 3 is a bottom view of a stain prevention cover, and FIG.
FIG. 5 is a left side view of the same, and FIG. 6 is a right side view of the same. 7 to 9 show a second embodiment of the present invention. FIG. 7 is a side sectional view of a main part, FIG. 8 is a side sectional view of a shielding part, and FIG. 9 is a right side view of the same. FIG. FIG. 10 is a side sectional view of a main part showing a third embodiment of the present invention. 1 ... body insulator, 1p ... opening at lower end, 1r ... projecting wall, 44
… Lid insulator, 44a… Support insulator part, 52… Antifouling cover, 52a… Support part, 52b… Tongue piece, 52c… Rainwater blocking part, 52e… Blocking part, 53… Fastening Pin, g ... gap

Claims (2)

(57) [Scope of request for utility model registration] An opening (1p) for projecting a fuse cylinder is formed at a lower end of a body insulator (1), and a supporting insulator (44a) of a lid insulator (44) is provided outside the opening (1p). In what
A rain water blocking portion (52c) attached to the main body insulator (1) and protruding outward from the main body insulator (1) in a gap (g) between the main body insulator (1) and the supporting insulator portion (44a); A fouling prevention cover is provided which comprises a closing part (52e) which is in close contact with the outer surfaces of the insulator (1) and the supporting insulator part (44a) to close the gap (g), and the closing part (52e) is provided. , A U-shaped support portion (52a) and an inverted U-shaped shielding tongue piece (52b) formed outside the support portion (52a). The rainwater shielding part (52c) is formed integrally with the rainwater shielding part (52c), and the rainwater shielding part (52c) is fixed to the main body insulator (1) with fastening pins (53). 52a) is fitted and fixed to a projecting wall (1r) formed on the main body insulator (1) at the opening (1p), and the tongue piece (52b) is attached to the outer surface of the support insulator (44a) of the lid insulator (44). Dense Salt for high pressure cutout, characterized in that is. 2. The shielding section (52e) according to claim 1, wherein:
Is formed from a U-shaped support portion (52a) and a tongue piece (52b) for blocking formed in an inverted U shape outside the support portion (52a), and the blocking portion (52e) is formed. The rainwater shield (5
The rainwater shielding part (52c) is formed separately from the main body insulator (1) with a fixing pin (53), and the U-shaped support part (52a) in the shielding part (52e) is formed separately from the above. The opening (1p) is fitted and fixed to the protruding wall (1r) formed on the main body insulator (1) at the opening (1p), and the tongue piece (52b) is attached to the supporting insulator portion (44) of the lid insulator (44).
a) High pressure cut-out for salt resistance characterized by being closely attached to the outer surface of a).