JPH0614329Y2 - Insulator pipe mounting device for switch - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention accommodates a switch such as a vacuum valve in a case, and allows a fixed conductor of a porcelain tube mounted on the case and a movable conductor of the switch. The present invention relates to a porcelain bushing mounting device for a switch, which mounts a porcelain bushing on a case in a switchgear connected by a flexible conductor.

[Conventional technology]

Generally, the switchgear is configured as shown in FIG.

In the figure, (1) is the bottomed main case, (2) is the main case
(1) Sub-case joined to the upper edge, (3) is a switch consisting of a vacuum valve held by the support (4) of the sub-case (2), (5)
Is a movable conductor of the switch (3), (6) is a drive shaft for opening and closing, (7) is a drive lever whose base is fixed to the drive shaft (6), and its tip is connected to the movable conductor (5). The movable conductor (5) is moved up and down by the rotation of the drive shaft (6) to turn the switch (3) on and off.

(8) is a bushing insulator attached to the bottom plate of the main case (1), (9) is a fixed conductor fixed to the insulator pipe (8), and (10) is a case
The cylindrical part of the skirt-shaped porcelain insulator (8) on the peripheral side of the fixed conductor (9) of (1), (11) is a flexible conductor connecting the movable conductor (5) and the fixed conductor (9), and (12) is It is a porcelain insulator attached to the sub-case (2).

The conventional porcelain bushing mounting device is configured as shown in FIG.

In the figure, (13) is a case corresponding to the main case (1) of FIG. 1, (14) is a through hole provided in the case (13), and (15) is a peripheral portion of the through hole (14). A plurality of welding studs are planted on the lower surface of the case (13), (16) is a porcelain tube, (17) is an outer peripheral portion of the porcelain tube (16), and the base of the porcelain tube (16) has a through hole (14 ), The inner surface of the outer peripheral edge (17) is passed through the through-hole (14) through the annular packing (18).
Is in contact with the peripheral edge of the.

(19) is an annular insulator presser, (20) is a through hole provided in the center of the insulator presser (19), and (21) is abutted on the outer surface of the outer peripheral edge (17) of the insulator (16). It is a ring-shaped cushion, and the through hole (20) of the porcelain bushing (19) is inserted through the tip of the porcelain bushing (16), and a plurality of holes are provided around the periphery of the through hole (20) of the porcelain bushing (19). The individual through holes are inserted into the welding stud (15), and the inner surface of the peripheral portion of the through hole (20) of the porcelain bushing (19) is brought into contact with the outer surface of the cushion (21).

Reference numeral (22) is a nut screwed to the welding stud (15), and by fastening the nut (22), the stud (19), the cushion (21), the outer peripheral edge (17), and the packing (18) are inserted. Insulator (16) case (1
It is attached to 3).

Then, assembling, after mounting the switch (3) and other circuit parts on the sub case (2) of FIG. 2, the main case (1) is mounted on the sub case (2), that is, the main case (1) Figure 3 Case (1
Insert the base portion of the porcelain bushing (16) into the through hole (14) of (3), and put the inner surface of the outer peripheral edge (17) of the porcelain bushing (16) on the periphery of the through hole (14) of the case (13) with the packing (18). A) through.

Next, the cushion (2) is attached to the outer surface of the outer peripheral edge portion (17) of the porcelain bushing (16).
0) abut, insert the through hole (20) of the porcelain bushing retainer (19) from the tip of the porcelain bushing (16), and attach each through hole of the porcelain bushing retainer (19) to the welding stud (1
5), and by fastening the nut (22) to the stud (15), the porcelain tube (16) is inserted through the porcelain tube retainer (19), the cushion (21), the outer peripheral edge portion (17), and the packing (18). Install in the case (13).

After that, the fixed conductor (9) of the porcelain insulator (8) and the movable conductor (5) of the switch (3) in FIG. 2 are connected by the flexible conductor (11).
In this case, the operator puts his / her hand through the working hole formed in the main case (1) and seals the hole after the work.

[Problems to be solved by the device]

In the conventional porcelain bushing mounting device, after mounting the porcelain bushing (8) on the main case (1), the flexible conductor (11) is connected from the working hole of the main case (1), so that work is performed. It is difficult, and it is necessary to make the holes for work after work sufficiently airtight.

Furthermore, since the welding stud (15) is implanted in the case (13), distortion occurs due to welding in the thin plate case (13) and the strength of the welding stud (15) is unstable.

Moreover, since the packing (18) is compressed between the thin plate case (13) and the outer peripheral edge portion (17) of the porcelain tube (16), the packing (18) is sufficiently compressed due to insufficient strength on the case (13) side. It is difficult to maintain airtightness.

The present invention has been made in view of the above points, and an object thereof is to provide a porcelain bushing mounting device for a switch, which is easy to work and does not cause distortion due to welding in a case and can sufficiently compress a packing.

[Means for Solving the Problems]

Means for solving the above problems will be described below with reference to FIG. 1 corresponding to the embodiment.

The porcelain bushing mounting device for a switch according to the present invention has a diameter larger than the diameter of the case (23) accommodating the switch and the outer peripheral edge (25) of the porcelain bushing (24) transparently provided in the case (23). The through hole (26) for insulator and the through hole for insulator through the packing (28) having an annular outer peripheral portion (27).
An annular stopper (29) abutted on the inner surface of the peripheral edge of (26),
An annular packing (31) interposed between the inner peripheral portion (30) of the fastener (29) and the inner surface of the outer peripheral edge portion (25) of the porcelain bushing (24).
A plurality of bolt through holes (32) that are transparently provided on the peripheral edge of the porcelain through hole (25), and the bolt through holes (32) that are planted in the stopper (29). A plurality of bolts (33) led out through the case, and the case (23) screwed into each of the bolts (33)
A plurality of fixing nuts (34) that abut the outer surface of the case and fix the stopper (29) to the case (23), and the inner surface of the inner peripheral portion is the outer surface of the outer peripheral edge portion (25) of the porcelain insulator (24). An annular porcelain tube retainer (36) abutted against the stud via a cushion (35), and the porcelain insulator retainer (36)
A plurality of holding through-holes (37) through which the bolts (33) are inserted and which are transparently provided on the outer peripheral part of the outer surface of the outer peripheral part of the porcelain insulator presser (36) screwed into the respective bolts (33). Abutting against the above insulator holder (36)
A plurality of pressing nuts (38) whose inner peripheral portion is pressed against the outer surface of the outer peripheral edge portion (25) of the porcelain bushing (24) via the cushion (35).
It is equipped with and.

[Action]

In the porcelain bushing mounting device for a switch according to the present invention constructed as described above, the diameter of the porcelain bushing through hole (26) of the case (23) is larger than the diameter of the outer peripheral edge portion (25) of the porcelain bushing (24). Therefore, after the fixed conductor of the porcelain bushing (24) is connected to the movable conductor of the switch via the flexible conductor, the case (23) can be attached to the upper case, and the work is easy.

Furthermore, since the bolts (33) are embedded in the stoppers (29), distortion does not occur in the case (23) due to welding, and the bolts (33)
Strength is also stable.

In addition, the metal fittings (29) attached to the case (23) by the bolts (33) and the fixing nuts (34) and the porcelain tube retainer (36) pressed by the pressing nuts (38) screwed onto the bolts (33). ),
Since the outer peripheral edge portion (25) of the porcelain insulator (24) is clamped through the packing (31) and the cushion (35), the packing (31) is sufficiently compressed to maintain airtightness.

〔Example〕

 An embodiment will be described with reference to FIG.

In the figure, (23) is a case corresponding to the main case (1) in FIG. 2, (24) is a porcelain tube, (25) is the outermost peripheral portion of the porcelain tube (24), and (26) is It is a through hole for a porcelain insulator that is provided through the case (23), and has a diameter larger than the diameter of the outer peripheral edge portion (25).

Reference numeral (29) is an annular stopper, the outer peripheral portion (27) of which is abutted against the inner surface of the peripheral portion of the through hole (26) for insulator pipe of the case (23) through the annular packing (28). Reference numeral (39) is a spacer, which is interposed between the outer surface of the inner peripheral portion (30) of the fastener (29) and the outer peripheral edge portion (25) of the porcelain bushing (24). (31) is an annular packing made of rubber or the like.
It is interposed between the outer surface of the inner peripheral portion (30) of 9) and the outer peripheral edge portion (25) of the porcelain insulator (24).

(32) is a plurality of bolt through holes penetrating the case (23) at the periphery of the porcelain through hole (26), and (33) is a plurality of bolts embedded in the stopper (29). And through holes for bolts (32) respectively
Have been derived through. (34) is each bolt (3
It is a fixed nut screwed to 3), a plain washer (40), and a washer.
It abuts the outer surface of the case (23) via the (41), and fixes the case (23) and the stopper (29).

Reference numeral (42) is one or a plurality of porcelain bushing retaining pins which are planted in the stopper fitting (29) and are led out from the porcelain bushing through hole (26). (43) is a V formed on the outer peripheral edge portion (25) of the porcelain insulator (24)
It is a notch of the shape, the pin (42) is located, and the circumference of the porcelain insulator (24) is blocked.

(36) is an annular insulator presser, (35) is an annular cushion interposed between the inner surface of the inner peripheral part of the insulator (36) and the outer surface of the outer peripheral edge (25) of the insulator (24), 37) is a plurality of through holes for pressing that are provided on the outer periphery of the porcelain bushing retainer (36).
3) is inserted and derived.

(38) are pressing nuts screwed into the respective bolts (33), and press the outer surface of the outer peripheral portion of the porcelain bushing retainer (36) through the washer (44) to press the inner peripheral portion of the porcelain bushing retainer (36). Outer peripheral edge of the insulator (24)
Press the outer surface of (25) through the cushion (35) to
3) and the porcelain insulator (24) are integrally held.

Then, the assembly of the device is performed by the outer peripheral edge portion (25) of the porcelain insulator (24).
Bolts (33) and pins (42) are planted on the inner surface of the packing (28).
The stopper metal fitting (29) equipped with is placed through the spacer (39) and the packing (31), the pin (42) is positioned in the notch (43), and the insulator tube (2
Connect the fixed conductor of 4) to the movable conductor of the switch with a flexible conductor.

Next, the porcelain through hole (26) of the case (23) is inserted into the porcelain pipe (24), the bolt through hole (32) of the case (23) is inserted into the bolt (33), and the fixing nut (34) is inserted. The metal fittings (29) and the case (23) are fixed to each other by tightening the bolts (33) to the bolts (33).

Further, insert the porcelain bushing retainer (36) on which the cushion (35) is placed on the inner surface of the inner peripheral part into the porcelain bushing (24), and insert the bolt (3
3) and tighten the pressure nut (38) to the bolt (33) to secure the outer peripheral edge (25) of the porcelain tube (24) between the stopper (29) and the porcelain tube retainer (36). The case (23) and the porcelain tube (24) are held together by being held by the spacer (39), the packing (31) and the cushion (35).

[Effect of device]

Since the present invention is configured as described above, it has the following effects.

The diameter of the porcelain through hole (26) of the case (23) is the outer peripheral edge of the porcelain bushing (24).
Since it is larger than the diameter of (25), the fixed conductor of the porcelain insulator (24) is connected to the movable conductor of the switch with a flexible conductor, and after mounting internal parts etc., the case (23) is mounted on the upper case. Since the work in the case is not performed unlike the conventional case, the work can be extremely simplified.

Furthermore, since the bolts (33) are planted in the fasteners (29), the distortion of the case (23) due to welding as in the past does not occur even if it is a thin plate, and the strength of the bolts (33) is increased. Can be stable.

In addition, the case (23) is fixed by the bolt (33) and the fixing nut (34).
The stopper metal fitting (29) that is integrated with the bolt (33) and the porcelain tube retainer (36) that is pressed by the pressing nut (38) screwed to the bolt (33) have a packing (31) and a cushion (35) between them. Since the outer peripheral edge portion (25) of the porcelain insulator (24) is held, the packing (31) can be sufficiently compressed and airtightness can be ensured.

[Brief description of drawings]

FIG. 1 is a cutaway front view of one embodiment of a porcelain bushing mounting device for a switch according to the present invention, FIG. 2 is a partially cut front view of the switchgear, and FIG. 3 is a cut front view of a conventional example. (23) …… Case, (24) …… Insulator, (25) …… Outer peripheral edge, (2
6) …… Insulator pipe through hole, (27) …… Outer peripheral part, (28) …… Patchin, (29) …… Stopper, (30) …… Inner peripheral part, (31) …… Patchin, (32 ) …… Bolt through hole, (33) …… Bolt, (34)…
… Fixed nut, (35) …… Cushion, (36) …… Insulator tube retainer, (37) …… Presser through hole, (38) …… Pressing nut.

Claims (1)

[Scope of utility model registration request] 1. A porcelain porcelain through a case in which a switch is housed, a porcelain through-hole having a diameter larger than the diameter of the outer peripheral edge of the porcelain porcelain, which is pierced in the case, and an outer peripheral ring-shaped packing. An annular stopper which is in contact with the inner surface of the peripheral portion of the insulating through hole, an annular packing which is interposed between the inner peripheral portion of the stopper and the inner surface of the outer peripheral portion of the insulator tube, A plurality of bolt through holes that are transparently provided on the periphery of the holes, a plurality of bolts that are planted in the fastener and that extend through the bolt through holes, and are screwed into the bolts. And a plurality of fixing nuts that are in contact with the outer surface of the case and fix the stopper to the case, and an inner surface of the inner peripheral portion is in contact with the outer surface of the outer peripheral edge portion of the porcelain bushing via a cushion. Insulator holder,
A plurality of through-holes for press-fitting, which are transparently provided on the outer peripheral portion of the porcelain bushing and into which the respective bolts are inserted, and an inner circumference of the porcelain retainer, which is screwed onto the respective bolts and abuts on the outer surface of the outer peripheral portion of the porcelain-blaster retainer. A porcelain bushing mounting device for a switch, comprising: a plurality of pressing nuts, which are pressed against the outer surface of the outer peripheral edge of the porcelain bushing through the cushion.