JPH0557742U - Gas switchgear - Google Patents

Abstract

(57) [Summary] [Purpose] To easily and securely install an insulating nozzle. [Structure] In a gas switchgear in which a compressed gas in a puffer chamber 14 is blown to an arc generated when a male contact 1 and a female contact 6 are separated from each other by using an insulating nozzle 8 as a guide to extinguish the arc. The contact surface 15 contacting the tip surface 16 of the nozzle support 7 at the intermediate portion of
And a circular groove 17 is formed on each contact surface between the side surface of the base of the nozzle 8 and the side surface of the tip of the nozzle support 7,
18 and O-ring 1 straddling both grooves 17 and 18
9 is inserted, and the nozzle 8 is attached to the nozzle support 7.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a gas switchgear such as a gas interrupter having a puffer chamber, a gas switchgear, etc., which can easily and securely mount an insulating nozzle.

[0002]

[Prior Art]

 A conventional gas switchgear of this type has a configuration shown in FIG. In the figure, 1 is a fixed male contact, 2 is a fixed cylinder, 3 is a movable conductor provided movably with respect to the cylinder 2, and 4 is a piston formed on the movable conductor 3 in the cylinder 2. Reference numeral 5 denotes an O-ring which is provided on the circumferential surface of the piston 4 and is in sliding contact with the inner surface of the cylinder 2, 6 is a female contact which is mounted on the tip of the conductor 3 and which is brought into contact with and separated from the male contact 1, and 7 is provided on the piston 4. Nozzle support.

Reference numeral 8 denotes an insulating nozzle provided so as to cover the tip portion of the female contact 6 which is brought into contact with the tip surface of the nozzle support 7, and 9 denotes a step portion formed in the middle portion of the outer peripheral surface of the nozzle 8. 10 is a presser foot for fixing the nozzle 8, 11 is a hook formed on the presser foot 10 and in contact with the step 9, 12 is a screw formed on the outer peripheral surface of the tip of the nozzle support 7, 13 is the presser foot 10 It is a screw that is formed on the inner peripheral surface of the base and is screwed into the screw 12. Both screws 12 and 13 are processed with a large diameter fine screw, and a punch lock is used to prevent vibrations such as opening and closing after tightening the screw. Has been applied. Reference numeral 14 is a puffer chamber in the cylinder 2.

Then, when the conductor 3 moves to the right from the closed state, the female contact 6 and the piston 4 move to the right, and the arc-extinguishing gas in the puffer chamber 13 is compressed to increase its pressure. The female contact 6 is separated from the male contact 1, and an arc is generated between the contacts 6 and 1, but the gas in the puffer chamber 14 is guided by the nozzle 8 and is blown to the arc, and the arc is extinguished.

[0005]

[Problems to be solved by the device]

 In the case of the above-mentioned conventional device, the screw 12 of the nozzle support 7 and the screw 13 of the presser foot 10 need to be machined with a large-diameter fine screw, which is difficult to perform, and the punch-lock work is required. There is a problem that the strength of the insulation nozzle 8 depends on the person, and the certainty of mounting the insulating nozzle 8 is weak. The present invention has been made in view of the above points, and an object thereof is to provide a gas opening / closing device in which an insulating nozzle is simply and surely mounted.

[0006]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention is designed to blow out a compressed gas in a puffer chamber by using an insulating nozzle as a guide to the arc generated when the male contact and the female contact are opened to extinguish the arc. In the opening / closing device, a contact surface is formed in the middle of the nozzle that abuts on the tip surface of the nozzle support, and annular grooves are formed on the mutual contact surfaces of the side surface of the base of the nozzle and the side surface of the tip of the nozzle support. The O-ring is fitted over both grooves and the nozzle is attached to the nozzle support.

[0007]

[Action]

 In the gas switchgear of the present invention configured as described above, since the contact surface of the intermediate portion of the insulating nozzle is in contact with the tip surface of the nozzle support, the protrusion inside the nozzle due to center run-out etc. Even if it contacts the male contact, it is absorbed by the contact surface, and an annular groove is formed on the mutual contact surface between the side surface of the nozzle base and the side surface of the tip of the nozzle support. Since the O-ring is fitted across the groove, the nozzle does not deviate due to the weak sliding frictional force generated between the nozzle and the male contact at the time of opening, and the nozzle can be mounted easily and securely. ..

[0008]

【Example】

 An embodiment will be described with reference to FIGS. 1 to 4. In these figures, the same symbols as those in FIG. 5 indicate the same or corresponding ones, and the points different from FIG. 5 are as follows. (Embodiment 1) In FIGS. 1 and 2 showing Embodiment 1, reference numeral 15 is a contact surface formed in the intermediate portion of the inner surface of the insulating nozzle 8 and is in contact with the tip surface 16 of the nozzle support 7. .. Reference numeral 17 is an annular groove formed on the inner surface of the base of the nozzle 8, 18 is an annular groove formed on the outer surface of the tip of the nozzle support 7, and 19 is an O-ring fitted over both grooves 17, 18. , 20 are tapers formed on the inner surface of the base end of the nozzle 8 to facilitate the mounting of the nozzle 8 on the nozzle support 7, as shown in FIG.

When a center runout or the like occurs between the male contact 1 and the insulating nozzle 8, the protrusion inside the nozzle 8 collides with the male contact 1 at the time of insertion, but the nozzle support 7 The impact in the moving direction is absorbed by the contact between the contact surface 15 of the nozzle 8 and the tip surface 16 of the nozzle support 7, and the nozzle 8 does not deviate from the nozzle support 7. In addition, at the time of opening, the sliding frictional force between the nozzle 8 and the male contact 1 is weak, and in this case also, the nozzle 8 does not deviate. The groove 17 of the nozzle 8 may be formed on the outer surface of the base of the nozzle 8 and the groove 18 of the nozzle support 7 may be formed on the inner surface of the tip of the nozzle support 7.

In addition, the conductor 3 and the nozzle support 7 may be a single piece or a divided piece, and the nozzle support 7 may be an insulator made of metal or synthetic resin.

Example 2 FIG. 3 showing Example 2 is different from Example 1 in that the conductor 3, the female contact 6, the nozzle support 7, and the nozzle 8 are fixed, and the male contact 1 is provided. And the cylinder 2 are movable integrally.

(Embodiment 3) In FIG. 4 showing Embodiment 3, a male contact 1, a conductor 3 and a cylinder 2 are fixed, an O-ring 5 is provided on the outer periphery of the tip end of the cylinder 2, and a nozzle support is provided. 7 has a cylinder function or a piston function, the inner surface of the outer cylinder 21 on the base side of the nozzle support 7 slides on the O-ring 5, and the inner surface of the inner cylinder 22 on the base side of the nozzle support 7 slides on the conductor 3. The one end of the male contact 6 mounted on the inner cylinder 22 is always in sliding contact with the conductor 3, and the other end of the female contact 6 is in contact with and separated from the male contact 1 by the movement of the nozzle support 7. ..

[0013]

[Effect of the device]

 Since the present invention is configured as described above, it has the following effects. Since the contact surface 15 of the intermediate portion of the insulating nozzle 8 is in contact with the tip surface 16 of the nozzle support 7, even if the protrusion of the nozzle 8 contacts the male contact 1 due to center run-out at the time of insertion, It is absorbed by the contact surface 15, and annular grooves 17 and 18 are formed on the mutual contact surfaces of the side surface of the base portion of the nozzle 8 and the side surface of the tip end portion of the nozzle support 7, and both the grooves 17 and 18 are formed. Since the O-ring 19 is fitted over the nozzle 8, the nozzle 8 does not deviate due to the slight sliding frictional force generated between the nozzle 8 and the male contact 1 when the nozzle is opened, and the structure is simple and the machining is easy. Therefore, there is no punch lock work, there is no individual difference in the mounting of the nozzle 8, and the nozzle 8 can be mounted reliably.

[Brief description of drawings]

FIG. 1 is a cut front view of a first embodiment of the present invention.

FIG. 2 is an exploded view of a portion of FIG.

FIG. 3 is a cut front view of the second embodiment.

FIG. 4 is a cut front view of a third embodiment.

FIG. 5 is a cut front view of a conventional example.

[Explanation of symbols]

 1 Male Contact 3 Conductor 6 Female Contact 7 Nozzle Support 8 Insulation Nozzle 14 Puffer Chamber 15 Contact Surface 16 Tip Surface 17 Groove 18 Groove 19 O-ring

Claims (1)

[Scope of utility model registration request] 1. A gas switchgear for extinguishing the arc by extinguishing the arc in the puffer chamber by using an insulating nozzle as a guide to blow an arc generated when the male contact and the female contact are separated from each other. A contact surface that abuts the tip end surface of the nozzle support, and annular grooves are formed on the contact surfaces of the side surface of the nozzle base and the side surface of the tip end of the nozzle support, respectively. A gas switchgear in which an O-ring is fitted over both the grooves and the nozzle is mounted on the nozzle support.