JP2005295715A5 - - Google Patents

Description

Solid insulation unit, assembly apparatus therefor, and assembly method therefor

The present invention disconnecting switch in the housing panel, breaker, the switch gear such as the conductor units for circuit connection is arranged, the solid insulation En'yu knit installed in the housing panel, the assembly of the solid insulation En'yu Knit The present invention relates to an apparatus and an assembly method thereof.

Generally, in the switchgear, disconnectors and breakers in the storage panel, and solid insulation En'yu knit for connecting between these devices electrically is disposed. Then, the solid insulation En'yu knit, and busbar insulated conductor units to connect the bus, there is a type, such as is possible branch insulated conductor unit connecting the connection conductor of the cable vertical select and.

  In particular, in the above-described branched insulated conductor unit, there is one in which a conductor is molded inside an insulator made of epoxy resin or the like, and contacts for AC three phases are integrally attached to this conductor. In such a branched insulated conductor unit, for example, in order to align and engage the connection terminal of the circuit breaker with each of the contacts for the three phases, the branched insulated conductor unit is accurately placed in advance on the frame constituting the storage panel. It is necessary to fix the positioning.

  However, normally, in the switchgear, it is difficult to set a reference position when the branch insulated conductor unit is positioned and fixed with respect to the frame of the storage panel. As a countermeasure, there has been conventionally provided a means for positioning and adjusting with the circuit breaker itself arranged in the storage panel (see, for example, Patent Document 1).

JP-A-6-77068

  However, in the case where the means for adjusting the positioning is provided by the breaker itself arranged in the storage panel as in the prior art, the connection terminals of the breaker are aligned with the contacts for the three phases of the branched insulated conductor unit. It took a very long time to adjust the positioning so as to mesh with each other, and the work efficiency was poor.

The present invention has been made to solve the above problems, performed easily and accurately assembling work for mounting creepage insulation performance high solids absolute En'yu knit, and the solid insulation En'yu knit storage panel solid absolute En'yu knit assembly apparatus for, and an object of the invention to provide the method of assembly.

To achieve the above object, the present invention provides a solid absolute En'yu knit integrally molded with the cast insulator, on one side of the side facing the supporting member for supporting the unit, the support member A contact fixing surface that is contacted and fixed to the support member is formed, and a surface other than the contact fixing surface is formed as a separation surface that gradually moves away from the support member.

Further, the present invention is the solid insulation En'yu knit of claim 1, wherein the assembly apparatus used to attach to the support member, the support opposite to the spaced surfaces and said spaced surface of the solid insulation En'yu Knit An assembly assisting member having a position restricting portion that is interposed between the side surfaces of the member and abuts on both surfaces and an attachment portion that extends from the position restricting portion and is attached to the support member is provided.

Furthermore, the present invention, the solid insulation En'yu knit of claim 1 wherein using the auxiliary assembly member according to claim 2, wherein the assembling method of fixing to the support member, said support member attachment portion of the assembly aid member a step of steps and, the assembly aid the solid insulation En'yu knit abutment fixed surface of the solid insulation En'yu knit being in contact with the position regulating portion of the member is fixed to the support member attached to said solid absolute En'yu knit connecting the connection conductor, comprising the steps of fixing, is characterized by comprising a step of removing said auxiliary assembly member after fixing the connection conductor.

According to the solid insulation En'yu knit of the present invention, one side of the side facing the supporting member for supporting the contact unit is formed as spaced surface portion excluding the contact fixing surface moves away gradually from the support member Therefore, an insulating space can be secured between the spacing surface and the support member. For this reason, the creeping insulation strength of the solid insulation unit can be increased.

According to the solid insulation En'yu knit assembling apparatus of the present invention, because the area of the contact fixing surface of the solid insulation En'yu knit is small, the positioning at the time of contact fixing the abutment fixed surface to a support member holding the even when it is difficult, since solid insulation En'yu knit by using the assembly aid member is positioned regulated, it can be temporarily assembled to the support member easily.

According to the solid insulation En'yu knit assembly method of the present invention, the holding and positioning of the solid absolute En'yu knit support member very easy and can be performed accurately. Therefore, compared to conventional, solid insulation En'yu assembling work time knit, and it is possible to greatly reduce the adjustment time for the positioning of the solid insulation En'yu knit.

Embodiment 1 FIG.
FIG. 1 is a longitudinal sectional view showing a main configuration of a switchgear according to Embodiment 1 of the present invention, and FIG. 2 is a sectional view taken along the line AA in FIG. 3 is a plan view showing a state where the branch insulated conductor unit is attached to the horizontal frame, FIG. 4 is a cross-sectional view taken along line BB in FIG. 3, and FIG. 5 is a cross-sectional view taken along line CC in FIG. It is. Further, FIG. 6 is a view showing a buried metal molded on the casting insulator of the branched insulated conductor unit.

  In the first embodiment, the switch gear 1 has a storage panel 2, and the storage panel 2 is provided with a floor plate 3 that divides the interior into an upper chamber 2a and a lower chamber 2b.

Then, the upper chamber 2a, is installed breaker 5 on the floor panel 3, further as a solid absolute En'yu knit Above the breaker 5, busbar insulated conductor unit 7 for connecting the bus 6, and the circuit breaker A branched insulated conductor unit 10 for connecting the connection terminals 5 and connection conductors 9 described later is disposed.

  The circuit breaker 5 can be pulled out by a wheel 5b provided on the cart 5a, and the circuit breaker 5c of the circuit breaker 5 is configured to be movable up and down with respect to the cart 5a. And by raising the interruption | blocking part 5c, each connection terminal of the circuit breaker 5 is connected to each contact provided in the bus-bar insulated conductor unit 7 and the branch insulated conductor unit 10. FIG.

  On the other hand, the cable 13 is drawn into the lower chamber 2b from the base side and is connected to the branched insulated conductor unit 10 via the cable terminal 14 and the two connection conductors 8 and 9. Of the two connection conductors 8 and 9, the lower connection conductor 8 is firmly held via an insulator 15 attached in the lower chamber 2b. The other connecting conductor 9 is an insulating outer periphery of a conductive round bar, and is provided so as to penetrate the floor plate 3 up and down, and its upper and lower ends are connected to the branch insulated conductor unit 10. Each of the conductors 8 is firmly connected with a bolt.

  The branched insulated conductor unit 10 is attached to a horizontal frame 16 as a support member constituting the storage panel 2. The branched insulated conductor unit 10 has a three-phase conductor 18 molded in a cast insulator 17 made of epoxy resin or the like. In addition, insertion holes 17a and 17b that are vertically opposed to each other and insertion holes 17c adjacent to these insertion holes 17a and 17b are formed at three locations on the casting insulator 17, and open downward. One end of the connection conductor 9 is inserted into one insertion hole 17a and fixed to the conductor 18 with a bolt, and the connection terminal of the circuit breaker 5 is inserted into the other insertion hole 17c. It is connected to the provided contact 18a.

  In addition, a contact fixing surface 17d that contacts and is fixed to the lateral frame 16 is formed on one side surface of the branch insulating conductor unit 10 on the side facing the lateral frame 16 of the casting insulator 17, and this contact The surfaces other than the fixed surface 17d are formed as a separation surface 17e inclined in a direction gradually moving away from the horizontal frame 16. Further, the casting insulator 17 is integrally molded with a buried metal 21 for mounting the unit 10 at two locations on the left and right sides, and each buried metal 21 is formed with a pair of upper and lower female screw portions 21a for screwing. In addition, each female screw portion 21 a is exposed on the contact fixing surface 17 d of the casting insulator 17.

  A screw insertion hole (not shown) is formed in advance on the side portion of the horizontal frame 16 facing the contact fixing surface 17d of the branched insulated conductor unit 10 so as to correspond to each female screw portion 21a of the buried metal 21. The branch insulated conductor unit 10 is fixed to the horizontal frame 16 by inserting the screw 22 through the screw insertion hole and screwing the screw 22 into the female medium portion 21a. In addition, screw holes 16b for fixing sandwiching jigs 26 and 27 described later are formed at two locations along the longitudinal direction of the upper and lower portions of the horizontal frame 16.

  Therefore, in the branched insulated conductor unit 10, only the contact fixing surface 17 d of the casting insulator 17 and the buried metal 21 are in contact with the side surface of the horizontal frame 16. It is fixed to the horizontal frame 16 by screws 22 screwed into this. In this state, since a diverging insulating space 23 is secured between the separation surface 17e of the casting insulator 17 and the outer surface 16a of the lateral frame 16, the creeping insulation strength of the branched insulated conductor unit 10 is increased. This is useful for making the switchgear 1 compact. In addition, since the cast insulator is substantially the same as that of the cross-insulated conductor unit 10 in the bus bar insulated conductor unit 7, the creeping insulation strength can be increased.

  Further, the branch insulated conductor unit 10 is fixedly held to the horizontal frame 16 with the screw 22 as described above, and after the assembly is completed by the connection with the connection terminal of the circuit breaker 5 and the connection conductor 9. Even if the clamping jigs 26 and 27, which will be described later, are removed, the mounting position does not shift and is securely held at that position.

  7 is a plan view showing a state in which the branch insulated conductor unit 10 is attached to the horizontal frame 16 using an assembling apparatus, FIG. 8 is a sectional view taken along the line DD in FIG. 7, and FIG. 9 is taken along the line EE in FIG. It is sectional drawing which follows.

  The assembling apparatus 25 used for positioning and fixing the branched insulated conductor unit 10 to the horizontal frame 16 includes a pair of upper and lower clamping jigs 26 and 27 that clamp the horizontal frame 16. Each of the sandwiching jigs 26 and 27 corresponds to an assembly assisting member in the claims, and is formed in a substantially L-shaped cross section by the position restricting portions 26a and 27a and the mounting portions 2b and 27b arranged orthogonal to each other. ing. The position restricting portions 26a and 27a are formed in a tapered shape so as to be interposed between the separation surface 17e of the branched insulated conductor unit 10 and the outer surface 16a of the horizontal frame 16 so as to contact the both surfaces 17e and 16a. The position restricting portions 26a and 27a are formed with U-shaped notches 26c and 27c for screw insertion corresponding to the positions of the respective buried metal 21. In addition, attachment holes (not shown) are formed in the attachment portions 26b and 27b at positions corresponding to the two screw holes provided in the horizontal frame 16, respectively.

  Next, an assembly procedure for positioning and fixing the branched insulated conductor unit 10 with respect to the lateral frame 16 of the storage panel 2 using the assembly device 25 having the above configuration will be described.

  First, the clamping jigs 26, 27 are installed so that the mounting holes of the clamping jigs 26, 27 are aligned with the screw holes 16 b of the horizontal frame 16, and then the clamping jigs 26 using the bolts 29. , 27 are fixed to the horizontal frame 16.

  Next, the female screw portion 21a of the buried metal 21 is pressed while pressing the separation surface 17e of the casting insulator 17 of the branch insulated conductor unit 10 against the side surfaces of the position restricting portions 26a, 27a of the sandwiching jigs 26, 27. It faces the screw insertion hole of the horizontal frame 8 through the notches 26c, 27c of the sandwiching jigs 26, 27. Then, the branch insulated conductor unit 10 is fixed to the horizontal frame 16 by screwing the screw 22 into the female medium portion 21a.

  At that time, the position restricting portions 26a, 27a of the sandwiching jigs 26, 27 are interposed between the separation surface 17e of the branched insulated conductor unit 10 and the outer surface 16a of the lateral frame 16, and come into contact with both surfaces 17e, 16a. Therefore, even when the weight of the branched insulated conductor unit 10 is relatively large and the contact area of the contact fixing surface 17e with the lateral frame 16 is small, the branched insulated conductor unit 10 does not cause unnecessary lateral vibration during fastening work. It can be easily positioned and fixed with respect to the horizontal frame 16 with high accuracy.

  After the branch insulated conductor unit 10 is fixed to the horizontal frame 16 in this way, one end of the connecting conductor 9 is inserted into the insertion hole 17a and fixed with a bolt, and the breaking portion 5c of the circuit breaker 5 is fixed. Is connected to the conductor 18 of the branched insulated conductor unit 10.

  Next, the bolt 29 is loosened and the upper and lower clamping jigs 26 and 27 are removed from the horizontal frame 16. Even when each clamping jig 26 and 27 is removed from the horizontal frame 16, the branch insulated conductor unit 10 is supported by the horizontal frame 16, the connection terminal of the circuit breaker 5, and the connection conductor 9. There is no, and it is securely held in that position.

  As described above, in the first embodiment, the branch insulated conductor unit 10 can be positioned and held on the horizontal frame 16 very easily and with high accuracy. The assembly time for the unit 10 to the storage panel 2 and the adjustment time for positioning the branch insulated conductor unit 10 can be greatly reduced.

  In the first embodiment, the contact fixing surface 17d of the casting insulator 17 of the branched insulated conductor unit 10 is formed so as to have a contact area with the horizontal frame 16, The contact area may be smaller and contact the horizontal frame 16 in a dot shape. Further, in the first embodiment, the separation surface 17e of the casting insulator 17 is formed so as to be inclined in a taper shape in a direction gradually moving away from the outer surface 16a of the horizontal frame 16. As shown in FIG. 10 (a), it may be arcuate, or it may be stepped as shown in FIG. 10 (b), or a combination of inclined surfaces and steps as shown in FIG. 10 (c). It may be.

  In the first embodiment, when the branch insulated conductor unit 10 is attached to the horizontal frame 16, the pair of sandwiching jigs 26 and 27 are positioned and fixed by the bolts 29. As shown in FIG. 11, a positioning arm 30 having a predetermined length is integrally fixed to the attachment portion 26 a of the clamping jig 26 by welding or the like, and a clamp means 31 is provided at the end of the arm 30. It is also possible to construct an assembly device.

  According to the assembling apparatus having this configuration, the clamping jig 26 can be easily positioned by fixing the arm 30 of the clamping jig 26 to the vertical frame 32 of the storage panel 2 by the clamping means 31. Assembling of the insulated conductor unit 10 to the horizontal frame 16 can be performed even more easily.

  In the first embodiment, the case where the branch insulated conductor unit 10 is positioned and fixed to the storage panel 2 has been described. However, the present invention is not limited to this, and the busbar insulated conductor unit 7 is attached to the storage panel 2 with accuracy. It can also be applied to the case where it is desired to position and fix well.

It is a longitudinal cross-sectional view which shows the principal part structure of the switchgear in Embodiment 1 of this invention. It is a sectional view taken along line A-A of FIG. It is a top view which shows the attachment state to the horizontal frame of a branch insulated conductor unit. It is sectional drawing which follows the BB line of FIG. It is sectional drawing which follows the CC line of FIG. It is a figure which shows the buried metal molded by the casting insulator of a branch insulated conductor unit. It is a top view of the state which attaches a branch insulated conductor unit to a horizontal frame using an assembly apparatus. It is sectional drawing which follows the DD line | wire of FIG. It is sectional drawing which follows the EE line | wire of FIG. It is a front view which shows the modification of a branch insulated conductor unit. It is a perspective view which shows the modification of the assembly apparatus in the case of attaching a branch insulated conductor unit to a horizontal frame.

Explanation of symbols

1 switchgear, 2 storage panel, 5 circuit breaker, 7 busbar insulated conductor unit,
10 branch insulated conductor unit, 16 horizontal frame (support member), 17 cast insulator,
17d contact fixing surface, 17e separation surface, 18 conductors, 25 assembly device,
26, 27 Clamping jig (assembly assisting member), 26a, 27a Position restricting portion,
26b, 27b Mounting part.

Claims (3)

In the solid insulation En'yu knit integrally molded with the cast insulator, on one side of the side facing the supporting member for supporting the unit, abutment fixed surface that contacts secured to the support member is formed Rutotomoni, solid insulation En'yu knit surface except the contact fixing surface, characterized in that it is formed as a separated surface away gradually from the support member. The solid insulation En'yu knit of claim 1, wherein a assembling apparatus used for attachment to the support member, and the side surface of the support member opposed to the spaced surfaces and said spaced surface of the solid insulation En'yu Knit assembly of solid insulation En'yu knit is interposed so as to extend from the position regulating portion and the position regulating portion abutting on both sides, characterized in that it comprises auxiliary assembly member having an attachment portion attached to the support member between apparatus. The solid insulation En'yu knit of claim 1 by using the assembly apparatus of claim 2, wherein a method of assembly to be fixed to the support member, and attaching the attachment portion of the assembly aid member to said support member, said a step of the solid insulation En'yu knit is fixed to the support member being in contact with abutment fixed surface of the solid insulation En'yu knit position regulating portion of the assembly aid member, connected to the solid insulation En'yu knit connecting conductor, steps and the solid insulation En'yu knit assembling method characterized by comprising the steps of: removing said auxiliary assembly member after fixing the connection conductor to be fixed.