CN1168186C - Enclosed switch board and isolation parts casing pipe - Google Patents

Abstract

An isolated part casing pipe and enclosed switch board equipped with the isolated part casing pipe having an insulated cylinder for supporting the connecting conductor on the bottom and covering the outside of the connecting conductor, and a fastening flange mounted on the edge of the insulated cylinder opening, etc, a bent portion mounted on one side of the axial section faced to the bottom of the insulated cylinder of the edge of the fastening flange. The invention is provided with enough strength to external force which is small-sized with an excellent withstanding voltage.

Description

Enclosed switch board and isolation parts casing pipe

The present invention relates in the isolation part of enclosed switch board (ENCLOSED SWTTCHGEAR) (DISCONNECTION SECTION), the wiring of supporting hauling-out type power equipments such as circuit breaker is with the isolation parts casing pipe of conductor and possess the enclosed switch board of isolation parts casing pipe.

The circuit breaker that generally is contained in the enclosed switch board adopts the hauling-out type to constitute for making the maintenance test operation easily, pushes and haul out operation by the place ahead by each reception room, can contact or leave with the isolation part that is arranged on the reception room back side.

Fig. 5 will be for will possess the sectional view of enclosed switch board one example of hauling-out type circuit breaker with modal representation.Illustrated enclosed switch board is the inside at the grounded metal system outer container 1 that forms rectangular box, with grounded metal or partition wall compartment made of insulating material, accommodate the breaker chamber 3a of hauling-out type circuit breaker 3 in its preceding bottom setting, the bus-bar chamber 6a of configuration bus-bar difference conductor 6 is set in the upper back of this breaker chamber 3a, the cable 7a that disposes with the load-side conductor 5 that send electrical cables to be connected 7 usefulness is set at rear lower.

Circuit breaker 3 is, on the base plate of breaker chamber 3a, can implement forwards hauling-out operation and push operation backward, rear wall 2 at breaker chamber 3a, be arranged on the binding post wiring of breaker chamber 3a rear side and remove the wiring that is connected by aforementioned hauling-out and support by sleeve pipe (bushing) 4 ' with outstanding by aforementioned push operation with conductor 14, to the inner outstanding aforementioned wiring of bus-bar chamber 6a be, with each bus-bar side difference conductor 6 connection mutually corresponding to three-phase with the rear end of conductor 14.

And, lower position at aforementioned sleeve pipe 4 ', the same sleeve pipe 4 ' that constitutes of configuration, the wiring not shown in the figures that is held in this sleeve pipe 4 ' is connected to the corresponding load-side conductor 5 of three-phase with the rear end of conductor in 7a inside, aforementioned cable vault, use down the isolation part that a pair of sleeve pipe 4 ', 4 ' formation make bus-bar side difference conductor 6 and load-side conductor 5 separate (disconnect) along with the hauling-out of aforementioned circuit breaker 3.

Fig. 6 amplifies the sectional view of expression for the sleeve pipe 4 ' that constitutes the isolation part, and Fig. 7 is the front view of the VII-VII line of Fig. 6.As shown in Figure 6, sleeve pipe 4 ' possess with wiring with conductor 14 run through the cylindrical form that is held in its bottom surface, opposite side and forms opening, the insulating cylinder 10 that forms by insulating material such as epoxy resin and the holding flange 11 that is arranged at circumference in open side in the mode that bloats laterally etc.Shown in Figure 7, insulating cylinder 10 see from the front be the predetermined insulation distance of maintenance that is arranged side by side at radial direction and cover respectively with each corresponding wiring of three-phase with conductor 14, three cylinders in 14,14 outsides, holding flange 11 is arranged at this insulating cylinder 10 outsides with the front shape of rectangle.

So the sleeve pipe 4 ' that constitutes as shown in Figure 6, with the bottom side of insulating cylinder 10 as the front, quite locational installation hole 2a through the rear wall 2 that is located in breaker chamber 3a, near this installation hole 2a inner edge, with the many places of aforementioned fixation flange 11 peripheries respectively by fixing screw 9,9 ... be locked and be installed on aforementioned rear wall 2.And, the 9a among Fig. 7,9a ... be fixing screw 9,9 ... the screw of locking usefulness.

Under this installment state, towards the outstanding outstanding blade of a sword 11a that is provided with of the peristome of the insulating cylinder 10 of breaker chamber 3a with different-diameter, 11b, and form gap 12 betwixt, shown in Fig. 6 double dot dash line, guarantee under isolation insulation creepage distance, and outstanding in the bottom of insulating cylinder 10 outstanding blade of a sword 11c is set, guarantee thus for being arranged on the insulation creepage distance of wiring continuously with the sleeve terminal 13 of conductor 14 rear sides for the gate sheet of closed peristome front.

But, in aforementioned sleeve pipe 4 ' in the past, when along with the hauling-out of circuit breaker 3 or push and when wiring applies axial external force with conductor 14, active force will bend for the holding flange 11 of the circumference in insulating cylinder 10 outsides, if will obtain predetermined strength to this bending force, must make this holding flange 11 guarantee thickness sufficient, this kind situation becomes obstruction sleeve pipe 4 ' the light-weighted main cause.

Moreover, for guaranteeing the surface leakage length of being scheduled to conductor 14 and sleeve pipe terminal 13 for applying high-tension wiring, to obtain the high withstand voltage performance, the positive size of holding flange 11 is increased, especially, when sleeve pipe terminal 13 being increased corresponding to the increase of rated current, be difficult to guarantee surface leakage length with the outstanding outstanding flange 11c that is arranged on insulating cylinder 10 bottoms, cause the more big shapeization of positive size of holding flange 11, this kind situation not only hinders sleeve pipe 4 ' lightweight, in order to ensure the erection space of holding flange 11 enclosed switch board is maximized comprehensively again.

Consider and this kind situation that main purpose of the present invention is to provide a kind of thickness that needn't rely on holding flange to increase and can obtains abundant intensity, guarantees for wiring with the isolation parts casing pipe of the sufficient surface leakage length of conductor and sleeve pipe terminal and possess the enclosed switch board of this isolation parts casing pipe.Still a further object of the present invention is to provide a kind of can not cause that the positive size of holding flange maximizes, the isolation parts casing pipe of small-sized light weight and withstand voltage properties excellence and possess the enclosed switch board of this isolation parts casing pipe.

The isolation parts casing pipe of the present invention that technical scheme 4 is put down in writing is arranged on the bend of a section to insulating cylinder bottom surface one lateral bending song for the circumference at the holding flange that is arranged at insulating cylinder open side circumference.

The enclosed switch board of the present invention that technical scheme 1 is put down in writing is for being arranged on aforementioned isolation parts casing pipe the power equipment chamber rear wall of accommodating hauling-out type power equipment, being that power equipment pushes on the wall of side.

In the present invention, circumference at holding flange is provided with bend, by increasing length surface along this bend, can guarantee for the surface leakage length of wiring with conductor and sleeve pipe terminal, on the other hand, make the external force that under installment state, acts on turn to tension force and act on holding flange, can make this holding flange guarantee full intensity thus, and needn't excessively increase thickness.

Enclosed switch board of the present invention that technical scheme 2 and 5 is put down in writing and isolation parts casing pipe are provided with the bellying that outward direction bloats for to be seen by the insulating cylinder open side on the limit of the holding flange with rectangular shape in the part near the insulating cylinder periphery.

In these the present invention, on limit near the holding flange of insulating cylinder periphery, that is be difficult to guarantee be provided with on the limit of surface leakage length the bellying of locality, can guarantee sufficient surface leakage length thus, and can not cause all maximizations of holding flange.

The enclosed switch board of the present invention that technical scheme 3 is put down in writing is that power equipment is a hauling-out type circuit breaker.

In the present invention, the power equipment as the enclosed switch board of technical scheme 1 and 2 can use hauling-out type circuit breaker.

The simple declaration of accompanying drawing

Fig. 1 is the sectional view of isolation parts casing pipe the 1st embodiment of the present invention.

Fig. 2 is the front view of the II-II line of Fig. 1.

Fig. 3 is the front view of isolation parts casing pipe the 2nd embodiment of the present invention.

Fig. 4 is the cutaway view of the IV-IV line of Fig. 3.

Fig. 5 is the sectional view of enclosed switch board one example.

Fig. 6 is the longitudinal sectional view of isolation parts casing pipe in the past.

Fig. 7 is the front view of the VII-VII line of Fig. 6.

Following according to accompanying drawing detailed description embodiments of the invention.Fig. 1 is the sectional view of isolation parts casing pipe the 1st embodiment of the present invention, and Fig. 2 is the front view of the II-II line of Fig. 1.

Sleeve pipe 4 shown in these figure is same with the sleeve pipe in the past 4 ' of Figure 6 and Figure 7, is in the enclosed switch board that possesses hauling-out type circuit breaker 3, is used for the isolation part that isolates by the hauling-out of this circuit breaker 3, the rear wall of 2 expression circuit breaker 3a among the figure.

Sleeve pipe 4 of the present invention possesses: run through the holding flange 8 etc. of supporting wiring to have the tubular insulation simple 10 of opening with conductor 14, opposite side and being arranged at circumference in the mode that bloats laterally in this open side in its bottom surface.The accessory that insulating cylinder 10 is made for insulating material such as epoxy resin, as shown in Figure 2, have and use 3 cylinders in conductor 14,14,14 outsides to separate the front shape that predetermined distance is arranged in parallel along radial direction keeping predetermined insulation distance to cover respectively corresponding to the wiring of three-phase.

Same with sleeve pipe 4 ' in the past shown in Figure 6, sleeve pipe 4 of the present invention is also at the outstanding outstanding flange 11a with different-diameter that is provided with of the peristome of the insulating cylinder 10 that faces toward breaker chamber 3a inboard, 11b, gap 12 is set therebetween, guarantees insulation creepage distance thus for the shutter plate s that covers aforementioned peristome front side.

Sleeve pipe 4 of the present invention is characterised in that the shape of the holding flange 8 that is arranged on insulating cylinder 10 outsides.Fig. 2 is the front view of being seen by insulating cylinder 10 open side, front shape with rectangle is arranged at circumference to aforementioned fixation flange 8 in insulating cylinder 10 outsides that form aforementioned front shape, its circumference as shown in Figure 1, at the axle section of insulating cylinder 10, be provided with towards bottom surface one side of this insulating cylinder 10 along full week and be bent into circular-arc bend 8a.

So the sleeve pipe 4 that constitutes inserts the installation hole 2a that is located in breaker chamber 3a rear wall 2 relevant positions with insulating cylinder 10 bottom surfaces one side as front end, the number of holding flange 8 circumferences is near the aforementioned installation hole 2a inner edge with each screw 9,9 ... be locked, be installed on aforementioned rear wall 2 thus.

At this moment, the aforementioned holding flange 8 that forms the axle section shape is connected to the inner edge front of installation hole 2a at the extended end retaining to the bend 8a rear of periphery, aforementioned fixation screw 9,9, fixing by aforementioned prolongation end, as shown in Figure 2, in 4 corners of rectangle and constitute 8 recess 8b of place of depression setting to the inside between 3 cylinders of insulating cylinder 10,8b ... the place tows.

In the sleeve pipe 4 that possesses aforementioned fixation flange 8, under installment state shown in Figure 1, along with the hauling-out of circuit breaker 3 (with reference to Fig. 5) or push and drag and be added on wiring and change direction along aforementioned bend 8a with the external force of the axial length direction of conductor 14, and work at the tension force of flange 8 as plus or minus, as shown in the figure, can by roughly uniformly thin-walled holding flange 8 guarantee full intensity, reach the lightweight significantly of the sleeve pipe 4 that comprises holding flange 8 thus.

Moreover, become along the length of the aforementioned bend 8a of holding flange 8 with the surface leakage length that conductor 14 reaches the sleeve pipe terminal 13 that is arranged at its rear side continuously for wiring, guarantee sufficient surface leakage length thus easily, and needn't increase the positive size of holding flange 8, not only the high withstand voltage performance can be obtained, the further lightweight of sleeve pipe 4 can also be reached.Moreover, for guaranteeing surface leakage length, needn't can use large scale sleeve pipe terminal 13 at the outstanding flange 11c of the bottom surface of insulating cylinder 10 arranged outside as original corresponding to big electric current for sleeve pipe terminal 13.

Fig. 3 is the front view of isolation parts casing pipe the 2nd embodiment of the present invention, and Fig. 4 is the cutaway view of the IV-IV line of Fig. 3.

In this embodiment, holding flange 8 is faced from the open side of insulating cylinder 10 and to be had rectangular shape as shown in Figure 3, and near the part periphery of the insulating cylinder 10 on its limit is provided with the bellying 15,15 that outward direction bloats for the middle body at its two minor face among the figure.This kind bellying 15,15 is near the periphery of insulating cylinder 10 as shown in Figure 4, and the short position of the length of the par before arriving bend 8a increases its length, guarantees for the sufficient surface leakage length of wiring with conductor 14 and sleeve pipe terminal 13.

The miniaturization of holding flange 8 integral body reduces relatively by the positive size that this kind bellying 15,15 is set, can makes holding flange 8 other parts of guaranteeing aforementioned par length easily, owing to can make more lightweight of sleeve pipe 4.

As previously mentioned, in the isolation parts casing pipe of the invention that technical scheme 4 is put down in writing, because circumference at the holding flange that is arranged at insulating cylinder open side periphery, be arranged on the arc-shaped bend portion of a section towards its bottom surface side, by increase along the holding flange length surface of this bend, the positive size that can make holding flange increases and guarantees sufficient surface leakage length for wire conductors and sleeve pipe terminal, can expect the raising withstand voltage properties thus, moreover since the external force that under installment state, acts on turn to tension force and act on holding flange, unnecessary increase thickness promptly can be guaranteed full intensity, and the result is than device lightweight significantly in the past.

Moreover the enclosed switch board of the invention put down in writing of technical scheme 1 can be arranged at aforementioned isolation parts casing pipe the power equipment chamber rear wall of accommodating hauling-out type power equipment, be on the wall that pushes side of power equipment.

Moreover, in the enclosed switch board of the present invention and isolation parts casing pipe that technical scheme 2 and 5 is put down in writing, owing to seeing by the insulating cylinder open side on the limit of holding flange with rectangular shape, part is provided with the bellying that bloats to foreign side near the insulating cylinder periphery, therefore in full week of holding flange, can guarantee sufficient surface leakage length by the maximization of integral body, can reach the raising and the lightweight of withstand voltage properties thus.

Moreover in the enclosed switch board that technical scheme 3 is put down in writing,, therefore can use hauling-out type circuit breaker etc. as power equipment because power equipment is the structure of hauling-out type circuit breaker.

Claims (5)

1. enclosed switch board, possess hauling-out type power equipment, accommodate this power equipment the power equipment chamber, be arranged on the isolation parts casing pipe on the aforementioned electric power canyon wall that pushes side of aforementioned power equipment; This isolation parts casing pipe possesses: the wiring of isolation part that contacts departure motion with the binding post that pushes side that is arranged on aforementioned power equipment is with conductor, with conductor prop up the insulating cylinder that be held in its bottom surface and be formed with bottomless drum shape with the state in the conductor outside with aforementioned wiring to cover this wiring, it is characterized in that also having the open side periphery that is arranged on this insulating cylinder and be arranged on the holding flange of a section to the bend of aforementioned bottom surface one lateral bending song at this circumference.

2. the enclosed switch board of putting down in writing according to claim 1 is characterized in that, holding flange sees to have rectangular shape by the open side of insulating cylinder, is provided with the bellying that bloats to the direction that breaks away from aforementioned periphery in the part near the insulating cylinder periphery on its limit.

3. according to the enclosed switch board of claim 1 or 2 records, it is characterized in that power equipment is a hauling-out type circuit breaker.

4. isolation parts casing pipe, possess and be formed with bottomless drum shape and cover the insulating cylinder of a wiring of the isolation part that is held in its bottom surface with the conductor outside, it is characterized in that also having and be arranged on this insulating cylinder open side periphery and be arranged on the holding flange of a section to the bend of aforementioned bottom surface one lateral bending song at this circumference.

5. according to the isolation parts casing pipe of claim 4 record, it is characterized in that holding flange sees to have rectangular shape by the open side of insulating cylinder, be provided with the bellying that bloats to the direction that breaks away from aforementioned periphery in the part that approaches the insulating cylinder periphery on its limit.

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