CN102611022A - Ground setting type transformer device - Google Patents
Ground setting type transformer device Download PDFInfo
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- CN102611022A CN102611022A CN2012100148372A CN201210014837A CN102611022A CN 102611022 A CN102611022 A CN 102611022A CN 2012100148372 A CN2012100148372 A CN 2012100148372A CN 201210014837 A CN201210014837 A CN 201210014837A CN 102611022 A CN102611022 A CN 102611022A
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Abstract
Provided is a ground setting type transformer device. On a side wall (6b1) of a transformer box (6), a sheath installation part (201b2) arranged on a switch box (201) of a LBS is connected across a sealing ring (16); primary sheath terminals (14u) to (14w) installed on the sheath installation part are lead into the transformer box (6) by a sheath leading window part (6h0) arranged on a side wall (6b1). A heat insulation plate (21) for covering part of the periphery of a window part (6h) is configured on the inner side of the transformer box (6) to restrain the rising of the temperature of the sealing ring (16). Parts of oil through parts of the primary sheath terminals (14u) to (14w) close to the LBS are used as a separating object (14B1); a sheath terminal isolation part (25) is arranged for isolating the separating object from the convection current of insulating oil (7) generated in the transformer box so as to restrain the heating of the insulating oil for the primary sheath terminals and to restrain the rising of temperatures of the sealing ring (16).
Description
Technical field
The present invention relates to be set at along the ground of the first-class position, pavement of road the type device for transformer is set.
Background technology
In recent years, in the city, along with the development of underground the burying underground of distribution wire, ground is provided with the type device for transformer and is set at along on the first-class position, the pavement of road.This device for transformer is shown in for example patent documentation 1.
In general, ground is provided with that the type device for transformer has being accommodated in transformer body and insulating oil together in the transformer-cabinet and transformer that constitutes and protection are contained in the structure in the outer case together with equipment.Be provided with equipment as protection: the high-voltage and current-limitation fuse between the primary side terminal that be arranged on high-tension cable and the primary side switch device (LBS) between elementary sheath (bushing) terminal of drawing from underground distribution wire, is inserted into elementary sheath terminal and transformer body and between the secondary sheath terminal of transformer and many distribution being drawn out to the outside are with low-voltage cable respectively the wiring of insertion with circuit breaker etc.
The structure of LBS is following: the switching device main body that will have by threephase switch that constitutes and the operating mechanisms of operating this switch such as vacuum valves is contained in the derailing switch casing of box; The connector (connector) that will be used for being connected high-tension cable with threephase switch is installed with the bottom of perforation casing front or the mode of bottom; And the mode of sheath installation portion that the elementary sheath terminal of the three-phase between the primary side that connects threephase switch and transformer is arranged on the back side of derailing switch casing with perforation is installed.
A sidewall at the transformer-cabinet that LBS has been installed; The sheath that is provided for importing the elementary sheath terminal at the back side that is installed in the derailing switch casing imports the window portion that uses; The sheath installation portion of derailing switch casing connects across the peripheral part of sealing ring (packing) and this window portion, be installed in sheath that breakthrough part in the oil of elementary sheath terminal of three-phase of sheath installation portion of derailing switch casing (from the sheath installation portion of the derailing switch casing part to the outside protrusion) passes transformer-cabinet import with window portion in and be inserted in the transformer-cabinet.In this state, the peripheral part that the sheath of transformer-cabinet imports with window portion is connected with the sheath installation portion of derailing switch casing through screw, thus, LBS is installed in the transformer-cabinet.Breakthrough part is submerged in the insulating oil in the transformer-cabinet in the oil of elementary sheath terminal.
Patent documentation 1:JP spy opens flat 9-168211 communique
Be provided with in the type device for transformer on above-mentioned ground; Sheath at the sidewall of transformer-cabinet imports the sheath installation portion that has connected the derailing switch casing with the peripheral part of window portion; Therefore; The heat of the insulating oil in the transformer-cabinet is delivered to the sheath installation portion and the sealing ring of derailing switch casing from the sidewall of transformer-cabinet, and, be passed to the sheath installation portion of derailing switch casing through breakthrough part in the oil of elementary sheath terminal.Because breakthrough part constantly contacts with the thermal insulation oil of convection current in transformer-cabinet in the oil of elementary sheath terminal; Therefore; A lot of heats can be delivered to the derailing switch casing from the insulating oil in the transformer-cabinet; Because the cause that this heat is transmitted, the temperature of the sheath installation portion of derailing switch casing can rise.
Be provided with in the type device for transformer on ground in the past; Owing to there is not special consideration to suppress by the heat transmission of transformer-cabinet to derailing switch casing side; Therefore, can not avoid the heating of the sealing ring between the sidewall of the sheath installation portion of derailing switch casing and transformer-cabinet.Thereby the performance that makes sealing ring is variation at short notice, might damage the sealing of the connecting portion of derailing switch casing and transformer-cabinet.If there is the possibility that is sealed in the short time damage of the connecting portion of derailing switch casing and transformer-cabinet, then need increase the frequency that carries out maintenance test, therefore, cause very burden from safeguarding, and can not avoid safeguarding the increase of required expense.Impaired at short notice for the sealing of the connecting portion that prevents derailing switch casing and transformer-cabinet, though can consider to use the high material of thermal endurance as sealing ring, if use the high sealing ring of thermal endurance, then unavoidable cost improves.In addition, because sealing ring often is exposed under the high temperature,,, also need frequent ground to carry out maintenance test in order to keep reliability even therefore under the situation of using the high sealing ring of thermal endurance.
Summary of the invention
The purpose of this invention is to provide the ground that the temperature of sealing ring of the connecting portion of a kind of sheath installation portion that can suppress to be used for enclosed switch device casing and transformer-cabinet rises the type device for transformer is set.
Of the present invention to as if a kind of ground the type device for transformer is set, comprising: transformer, it has transformer-cabinet and the transformer body that is accommodated in this transformer-cabinet; And primary side switch device; It is through constituting at derailing switch casing content nanomechanical switch; Above-mentioned derailing switch casing has the high-tension cable connecting portion and the sheath installation portion that the elementary sheath terminal that is connected with the primary side of transformer body has been installed that is used to connect high-tension cable, and above-mentioned switch is used for carrying out switch between high-tension cable and the elementary sheath terminal.Be provided with in the type device for transformer on ground as object of the present invention; The sheath that the sheath installation portion of derailing switch casing contacts across sealing ring on the sidewall that is being set at transformer-cabinet imports on the peripheral part with window portion, thereby supports the primary side switch device through peripheral part and the affixed transformer that makes of sheath installation portion that sheath is imported with window portion.Elementary sheath terminal imports via sheath and is directed in the transformer-cabinet with window portion, and is submerged in the insulating oil in the transformer-cabinet.
In the present invention, in the inboard of a sidewall of transformer-cabinet sheath is imported the thermal insulation board that the peripheral part with window portion covers, the state that is complementary with an inside surface of side wall with transformer-cabinet is configured.In addition; With elementary sheath terminal be submerged in part in the insulating oil at least near the part of sheath installation portion as the isolated subject part, the isolated subject part of this elementary sheath terminal is installed in the transformer-cabinet with the isolated sheath terminal isolation part of the convection current of the insulating oil that in transformer-cabinet, produces.At this, " the isolated subject part is isolated with the convection current of the insulating oil that in transformer-cabinet, produces " is meant: the isolated subject part is not directly contacted with the convection current of the insulating oil that in transformer-cabinet, produces.
As stated; If will be in the inboard of a sidewall of transformer-cabinet to sheath import thermal insulation board that the peripheral part with window portion covers with a state configuration that inside surface of side wall is complementary of transformer-cabinet; The heat transferred that then can suppress the insulating oil in the transformer-cabinet to sealing ring, thereby avoid the temperature of sealing ring to rise.
In addition; As stated; If will be installed in the isolated subject of elementary sheath terminal part in the transformer-cabinet with the isolated sheath terminal isolation part of the convection current of the insulating oil that in transformer-cabinet, produces; The convection current of the insulating oil that in transformer-cabinet, produces is not directly contacted with the isolated subject part of elementary sheath terminal; The isolated subject part (part near the primary side switch device of elementary sheath terminal) that then can prevent elementary sheath terminal directly contacts and is heated with the thermal insulation oil that flows, and therefore, can reduce the heat that is delivered to the sheath installation portion through elementary sheath terminal; Thereby the temperature that suppresses the sheath installation portion of derailing switch casing rises, and suppresses the temperature rising of sealing ring.
Sheath terminal isolation part can be arranged on the inboard of transformer-cabinet, also can be arranged on the outside.In an embodiment of the invention; Sheath terminal isolation part is formed by heat-barrier material, and is integratedly and has: in the inboard of transformer-cabinet so that the sheath that the isolated subject of elementary sheath terminal partly is spaced from each other and opposed up and down mode is provided with, base portion is fixed on transformer-cabinet imports a pair of barrier with the peripheral part of window portion; And, be provided with the hole that elementary sheath terminal is connected at end wall with the end wall that the mode between the top ends that connects this a pair of barrier is provided with.
If constitute the sheath terminal as stated; Then can not hinder insulating oil to flow under the situation on every side that is submerged in the part in the oil of elementary sheath terminal; The isolated subject part of elementary sheath terminal is isolated with the convection current of insulating oil; Therefore, can suppress, rise thereby suppress temperature from the heat transmission of insulating oil to the sheath installation portion.
In other execution modes of the present invention; The sheath that is arranged on a sidewall of transformer-cabinet imports with window portion to have from a sidewall of this transformer-cabinet to duct-like protrusion wall portion that the primary side switch device side protrudes; And the top in this protrusion wall portion is provided with flange; Connect across the sheath installation portion of sealing ring and derailing switch casing on the top of sheath importing with the protrusion wall portion of window portion, the flange on the top of protrusion wall portion is connected with the sheath installation portion.In this case, elementary sheath terminal is directed in the transformer-cabinet via the inboard of protrusion wall portion, and constitutes sheath terminal isolation part by protrusion wall portion.In addition, thermal insulation board is set to assign to stop up this window portion to the sheath importing with the periphery of window portion through covering from the inboard of transformer-cabinet, on the obstruction sheath of this thermal insulation board imports with the part of window portion, the sheath run-through hole that elementary sheath terminal is connected is set.Elementary sheath terminal is directed in the above-mentioned transformer-cabinet via the sheath run-through hole of thermal insulation board.In addition, on thermal insulation board, be provided with the unit that the insulating oil that allows in the transformer-cabinet flow into the inboard of the protrusion wall portion that constitutes sheath terminal isolation part.
Above-mentioned thermal insulation board can be made up of the heat conductivity material lower than transformer-cabinet, and this material is a selected material from the material group that constitutes by pressboard, timber, resin, inorganic matter series fiber material, plastics series fiber material and with the composite material of their combinations.In addition; Under the situation of the inboard that sheath terminal isolation part is arranged on transformer-cabinet, this sheath terminal isolation part can be made up of selected material from the material group that constitutes by pressboard, timber, resin, inorganic matter series fiber material, plastics series fiber material and with the composite material of their combinations.
(invention effect)
In the present invention; Since the state configuration that is complementary with a inside surface of side wall with transformer-cabinet at least sheath is imported the thermal insulation board that the peripheral part with window portion covers in the inboard of a sidewall of transformer-cabinet; The heat that therefore, can suppress the insulating oil in the transformer-cabinet is passed to sealing ring.In addition, the sheath terminal isolation part that will accommodate the isolated subject part of elementary sheath terminal in inside is installed in the transformer-cabinet, and utilizes the convection current of the insulating oil that sheath terminal isolation part prevents in transformer-cabinet, to produce partly directly to contact with the isolated subject of elementary sheath terminal; Owing to adopted such structure; Therefore, can prevent that the part near the sheath installation portion of elementary sheath terminal from directly contacting and being heated with thermal insulation oil, can reduce the heat that is delivered to the sheath installation portion; In addition; Utilize thermal insulation board to suppress the heat transmission to sealing ring, thus, the temperature that can suppress sealing ring rises.
According to the present invention; As stated, rise owing to can suppress the temperature of sealing ring, therefore; As sealing ring; Even do not use the high expensive material of thermal endurance, can prevent that also sealing ring is aging in advance and reach useful life that the maintenance that therefore can make ground that the type device for transformer is set becomes easy.
Description of drawings
Fig. 1 is the longitudinal sectional view that expression ground of the present invention is provided with an execution mode of type device for transformer.
Fig. 2 is the rearview of employed primary side switch device in the execution mode of Fig. 1.
Fig. 3 is the amplification view of the connecting portion of expression ground shown in Figure 1 primary side switch device and transformer-cabinet that the type device for transformer is set.
Fig. 4 is that near the interior front view of importing portion of transformer-cabinet that ground shown in Figure 1 is provided with the elementary sheath terminal of type device for transformer is led in expression.
Fig. 5 is the cutaway view of pith that expression ground of the present invention is provided with other execution modes of type device for transformer.
Fig. 6 be the expression ground be provided with the type device for transformer electric structure one the example single-lined diagram.
Among the figure:
1 transformer
2 primary side switch devices
201 derailing switch casings
201a1 high-tension cable connecting portion
The back side of 201b derailing switch casing
201b2 sheath installation portion
3u to 3w high-tension cable
4 outer case
6 transformer-cabinets
The sidewall of 6b1 transformer-cabinet
The elementary sheath of 6h imports the window portion that uses
7 insulating oils
8 transformer body
9u to 9w fuse holder
11u to 11w level sheath terminal
The 11n neutral terminal
13u to 13w connects the connector of high-tension cable
The elementary sheath terminal of 14u to 14w
Breakthrough part in the 14A gas
Breakthrough part in the oil of the elementary sheath terminal of 14B
The isolated subject portion of the elementary sheath terminal of 14B1
16 sealing rings
21 thermal insulation boards
25,25 ' sheath terminal isolation part
25a, 25b barrier portion
The 25c end wall
25d makes the hole of elementary sheath run-through
40 sheath terminals import the window portion that uses
41 peristomes
42 protrusion wall portions
The 42a flange
44 thermal insulation boards
Embodiment
Below, with reference to accompanying drawing an embodiment of the invention are elaborated.What Fig. 1 represented to Fig. 4 is first execution mode of the present invention.In these figure; 1 is transformer; 2 are the primary side switch device that carries out switch between the high-tension cable 3u to 3w to the primary side of transformer 1 and the three-phase of drawing from distribution wire (below be also referred to as LBS), and 4 for being used for holding the outer case of transformer 1 and primary side switch device 2.Though do not show among the figure; But in outer case 4, also accommodate the primary side that is inserted in transformer 1 and be drawn out to outside distribution, by outer case 4 be contained in its inner equipment and constituted ground type device for transformer 5 is set with other equipment needed therebies such as Inturruptor for sub-line between the low-voltage cable.
Transformer-cabinet 6 have OBL bottom wall portion 6a, from respect to the depth direction of bottom wall portion 6a (along the direction on long limit; The left and right directions of Fig. 1) sidewall that sidewall 6b1 that a end and the other end are vertically holded up respectively and 6b2 and from end of the Width (with the rectangular direction of the paper of Fig. 1) of bottom wall portion 6a and figure that the other end is vertically holded up respectively, not having shows welds the casing main body 600 that constitutes the close structure of liquid through each the adjacent edge part with bottom wall portion 6a and sidewall.On the flange 601 of the peristome of the upper end that is arranged on this casing main body, place top board 6c, through with the affixed and open upper end portion of closed box main body 600 of top board 6c and flange 601 across sealing ring.Lean on a little on the part of upside comparing with the pars intermedia of the above-below direction of the sidewall 6b1 of transformer-cabinet 6, the sheath of the rectangle that uses for the elementary sheath terminal of the three-phase at the back side that imports the derailing switch casing that is installed in primary switch device 2 that forms that the back will mention imports with the 6h of window portion (with reference to Fig. 3).
Three-phase transformer main body 8 shown in the figure is the well-known equipment that coil Cu, Cv and the Cw of winding three-phase on the tripod I unshakable in one's determination that constitutes by having made up the winding iron core forms.Transformer body 8 is fixed on the bottom wall portion 6a of transformer-cabinet 6.Three-phase coil Cu to Cw constitutes with the primary coil that is wrapped in the outside of secondary coil by being wrapped in inboard secondary coil.Though the wiring of the three-phase coil of transformer in the present invention is arbitrarily, in this execution mode, the primary coil of three-phase is that triangle connects, and secondary coil is star-like connection.The terminal of the non-neutral point side of the three-phase of the primary side of transformer body is connected with secondary sheath terminal 11u to 11w respectively, and neutral point is connected with neutral terminal 11n.In transformer-cabinet 6, reach near the mode of level of its upper end and inject insulating oil 7, dipping transformer body 8 in insulating oil 7 with pasta 7a.
Primary side switch device (LBS) 2 accommodates the switch and its operating mechanism to carrying out switch between the primary side of high-tension cable 3u to 3w and transformer simultaneously in derailing switch casing 201.
Derailing switch casing 201 roughly is box; Have with respect to the front 201a of depth direction (left and right directions among Fig. 1) and back side 201b, with respect to a pair of side 201c and the 201d (with reference to Fig. 2) of Width (direction rectangular) with the paper of Fig. 1, and with respect to the upper surface 201e and the lower surface 201f of above-below direction.
Protrude downwards from the part near the back side 201b of lower end of derailing switch casing 201; Form the high-tension cable connecting portion 201g of hollow; In the front of this high-tension cable connecting portion 201g, to go up the connector 13u to 13w that the state of arranging has been installed the high-tension cable 3u to 3w that is connected three-phase respectively in horizontal (with the rectangular direction of the paper of Fig. 1).
On the 201a of the front of derailing switch casing 201, be provided with forwards the peristome of (left side among Fig. 1) opening, this peristome is closed through the cover plate 203 that can install and dismantle.
Like Fig. 2 and shown in Figure 3, on the periphery of the back side of derailing switch casing 201b, formed surrounding wall portion 201b1 to transformer tank side protrusion.In addition, also be positioned at the inboard, and the sheath installation portion 201b2 that forms thicklyer forms than surrounding wall portion 201b1 and also protrudes to the transformer tank side than surrounding wall portion 201b1.Three sheath installing hole 201h that sheath installation portion 201b2 is connected are arranged side by side in the horizontal, and, the elementary sheath terminal 14u to 14w of the three-phase that connects these three sheath installing holes has been installed.
As shown in Figure 3; Each elementary sheath terminal has well-known structure; Promptly have the sheath 14a that forms by insulant and on axis direction, connect the conductor 14b of sheath 14a, the portion of terminal 14c and the 14d that are used to connect other conductors an end and the other end being provided with of conductor 14b.In the example shown in the figure; Portion of terminal 14c and 14d are made up of external thread part and internal thread part respectively; The portion of terminal 14c that is made up of external thread part is connected with a end of switch in being contained in derailing switch casing 201 via the bonding conductor that not have among the figure to show, the portion of terminal 14d that is made up of internal thread part is via there not being the bonding conductor of demonstration to be connected with the primary side of transformer body 8 in scheming.
Periphery at the pars intermedia of the sheath 14a of each elementary sheath terminal forms flange 14e, becomes in the gas breakthrough part 14B in breakthrough part 14A and the oil respectively in the part of the part of the portion of terminal 14c side of the flange 14e of sheath and portion of terminal 14d side.Breakthrough part 14A connects pairing sheath installing hole 201h in the gas of each elementary sheath terminal; Be inserted in the derailing switch casing 201; The sheath that breakthrough part 14B passes transformer-cabinet 6 in the oil imports and to be directed in the transformer-cabinet 6 with the 6h of window portion, and is submerged in the interior insulating oil 7 of this transformer-cabinet.
Each elementary sheath terminal is with in the sheath installing hole 201h at the back side of breakthrough part 14A in its gas being passed derailing switch casing 201 and the states that are inserted in the derailing switch casing 201 dispose, and between the flange 14e of the sheath of each elementary sheath terminal and sheath installation portion 201b2, has inserted O type circle 203.
For each elementary sheath terminal is fixed on sheath installation portion 201b2; Be provided with the rectangular-shaped sheath fixed head 204 of three hole 204a that breakthrough part 14B connects in the oil with the elementary sheath terminal 14u to 14w that makes three-phase respectively, this sheath fixed head 204 is affixed with the sheath installation portion 201b2 of derailing switch casing 201 through bolt 205.Thus, each elementary sheath terminal is fixed on the sheath installation portion 201b2 of derailing switch casing 201 with the state of oil-tightness sealing.
On the part near the periphery of sheath installation portion 201b2 of derailing switch casing 201, be provided with sealing ring around and hold groove 201i, hold in the groove, accommodate sealing ring 16 at the sealing circle.In the zone that sealing ring holds the internal side diameter of groove 201i that is arranged in of sheath installation portion 201b2, form along sealing ring and hold a plurality of screw hole 201i that groove 201i arranges) with reference to Fig. 2.And; The sheath installation portion 201b2 of derailing switch casing 201 pushes up the sidewall 6b1 of transformer-cabinet 6 across sealing ring 16 sheath imports the peripheral part with the 6h of window portion, and breakthrough part 14B is directed in the transformer-cabinet 6 in the oil of the elementary sheath 14u to 14w of three-phase.
As shown in Figure 3; Import on the inner face with the sidewall 6b1 of the transformer-cabinet 6 of the 6h of window portion being provided with sheath, dispose being positioned at the state that thermal insulation board 21 that the sheath importing covers with the part of the inboard of the sealing ring at least 16 of the periphery of the 6h of window portion is complementary with the inner surface with the sidewall 6b1 of transformer-cabinet.In the example shown in the figure, thermal insulation board 21 is set to surpass the part relative with sealing ring 16 of inner surface of the sidewall 6b1 of transformer-cabinet 6, and will with almost whole covering of the opposed part of back side 201b of the derailing switch casing 201 of sidewall 6b1.
In the present invention; With elementary sheath terminal 14u to 14w be submerged in part (breakthrough part in the oil) in the insulating oil at least near the part of LBS as the isolated subject part 14B1 isolated with the convection current of insulating oil; 14B1 is contained in inside with this isolated subject part, will be installed in the transformer-cabinet 6 with the sheath terminal isolation part 25 that constitutes with the isolated mode of the convection current of insulating oil.
Sheath terminal isolation part 25 shown in the figure is formed by heat-barrier material, and is integratedly and has: in the inboard of transformer-cabinet 6 so that the sheath that the isolated subject part 14B1 of elementary sheath terminal 14u to 14w is spaced from each other and opposed up and down mode is provided with, base portion is fixed on transformer-cabinet imports a pair of barrier 25a of portion, 25b with the peripheral part of window portion; And, be provided with three hole 25d that elementary sheath terminal 14u to 14w is connected at end wall 25c with the end wall 25c that the mode between the top ends that connects a pair of barrier 25a of portion, 25b is provided with.Horizontal two ends 25e, 25f (with reference to Fig. 4) in sheath terminal isolation part 25 form peristome, and the insulating oil in the transformer-cabinet 6 can be flowed in the sheath terminal isolation part 25 from these peristomes.
In the example shown in the figure; On the base portion of the 25a of barrier portion of sheath terminal isolation part 25,25b, form along bellying 25a1, the 25b1 of the plate face of thermal insulation board 21, these bellyings 25a1,25b1 with the end position adjacent up and down of sheath fixed head 204 on connect with thermal insulation board 21.
The sidewall 6b1 of protuberance 25a1,25b1, thermal insulation board 21 and transformer-cabinet 6 of base portion of the 25a of barrier portion, the 25b of sheath terminal isolation part 25 is connected; A series of screw hole 201j201j to the sheath installation portion 201b2 that is arranged on derailing switch casing 201; ... be screwed into screw 22,22... in (with reference to Fig. 2); Through these screws 22; Make derailing switch casing 201 and transformer-cabinet 6 affixed, and thermal insulation board 21 is fixed on the transformer-cabinet 6 with sheath terminal isolation part 25.In this execution mode, also welded the 201k of ear (with reference to Fig. 2) in the upper end and the lower end of the rear side of derailing switch casing 201, these ears are affixed through the sidewall 6b1 of screw and transformer-cabinet 6.Breakthrough part 14B is immersed in the insulating oil 7 in the transformer-cabinet in the oil of the elementary sheath terminal 14u to 14w of sheath terminal isolation part 25 in being directed to transformer-cabinet 6.
In this execution mode, thermal insulation board 21 and sheath terminal isolation part 25 are made up of than transformer-cabinet (being formed by iron plate usually) 6 also low low heat conductivity materials heat conductivity.Because thermal insulation board 21 and sheath terminal isolation part 25 are submerged in the insulating oil; Therefore; As the low heat conductivity material that constitutes them; Most preferably the durability in insulating oil has obtained the pressboard (pressboard) that confirms, but the present invention is not limited to by pressboard and constitutes above-mentioned thermal insulation board 21 and sheath terminal isolation part 25.Consider oil resistance; The low heat conductivity material that constitutes thermal insulation board 21 and sheath terminal isolation part 25 can suitably be selected from the material group that is made up of material as follows, and the material in the above-mentioned material group comprises: inorganic matter series fiber material, the plastics series fiber material of resin, glass fiber or the carbon fiber etc. of pressboard, timber (veneer or three-ply board), epoxy resin or phenolic resin etc. and the composite material (for example fiber-reinforced plastic) that these materials are made up.In addition, thermal insulation board 21 and sheath terminal isolation part 25 both can be made up of same material, also can be made up of diverse material.
In this execution mode, use vacuum valve as the threephase switch between the primary side of switch high-pressure cable 3u to 3w and transformer body 8, these vacuum valves and the operating mechanism that they are operated separately is installed in the derailing switch casing 201.In Fig. 2; The mode that the operating mechanism of switch can both carry out with automatic operation and manual operation constitutes; The operating axis 210 (with reference to Fig. 2) that when manual operation switch, is rotated operation is exported to the outside, fitting operation handle 211 on this operating axis by the side by derailing switch casing 201.
The radiator 30 that carries out heat exchange between the air that is used in the outside of insulating oil 7 and transformer-cabinet is being installed at least one sidewall of transformer-cabinet 6.Though show not among the figure that on the sidewall 6b4 of transformer-cabinet 6, be provided with the Inturruptor for sub-line (breaker) that a plurality of three-phases are used, the secondary sheath terminal 11u to 11w of three-phase is connected with the three-phase low-voltage cable that is connected to the user through each Inturruptor for sub-line.Low-voltage cable is via being connected with distribution wire in the underground cable trough.Secondary neutral terminal 11n is via there not being the earth connection of expression to be connected with earthing potential portion among the figure.
The line chart of electric structure of representing this execution mode is as shown in Figure 6.In the figure, SW is the switch that is made up of vacuum valve, and 31a to 31e is an Inturruptor for sub-line, and 32a to 32e is a low-voltage cable.
As this execution mode; If will cover at least in the inboard of a sidewall of transformer-cabinet sheath import with the thermal insulation board 21 of the peripheral part of window portion with a state configuration that inside surface of side wall is complementary of transformer-cabinet; The heat that then can suppress the insulating oil in the transformer-cabinet is passed to sealing ring 16, thereby the temperature that can suppress sealing ring 16 rises.
In addition; As this execution mode; If through with elementary sheath terminal 14u to 14w near the part of LBS as isolated subject part 14B1; And the sheath terminal isolation part 25 that will hold the isolated subject part 14B1 of elementary sheath terminal 14u to 14w in inside is installed in the transformer-cabinet, thereby if preventing the convection current of the insulating oil 7 of generation in transformer-cabinet 6 in advance directly contacts with the isolated subject part of elementary sheath terminal, can prevent that then the isolated subject part of elementary sheath terminal 14u to 14w from directly contacting and being heated with the thermal insulation oil that flows; Therefore; Can reduce the heat that is delivered to sheath installation portion 201b2 through elementary sheath terminal 14u to 14w, the temperature that suppresses the sheath installation portion 201b2 of derailing switch casing 201 rises, thereby the temperature that can suppress sealing ring 16 rises.
According to the present invention,, therefore,, can prevent that also sealing ring is aging in advance and reach useful life even do not use the high expensive material of thermal endurance as sealing ring 16 owing to can suppress the temperature rising of sealing ring 16.
In the above-described embodiment; Though it is thermal insulation board 21 and sheath terminal isolation part 25 is affixed with transformer-cabinet through bolt; But, thermal insulation board 21 and sheath terminal isolation part 25 are not limited to the method shown in the above-mentioned execution mode with the transformer-cabinet fixed method.
In the above-described embodiment, though the horizontal two ends of sheath terminal isolation part 25 at the transformer-cabinet inner opening, also can constitute sheath terminal isolation part 25 with the whole mode of the 14B1 of isolated subject portion that centers on elementary sheath terminal.For example, in the above-described embodiment, the wall portion that the horizontal two ends of sheath terminal isolation part 25 are sealed can also be set.But; Constituting under the situation of sheath terminal isolation part 25 with the whole mode of the 14B1 of isolated subject portion that centers on elementary sheath terminal; In order to fill up with insulating oil in the sheath terminal isolation part 25 (for breakthrough part in the oil of elementary sheath terminal is immersed in the insulating oil), need in advance to be provided with the communication path of the interior spatial communication of the space that makes in the sheath terminal isolation part 25 and transformer-cabinet 6 through the wall portion that connects sheath terminal isolation part 25.This communication path for example can connect the gap that forms between interior week and the elementary sheath terminal of the hole 25d on the end wall 25c be arranged on sheath terminal isolation part 25 through breakthrough part 14B in for the oil that makes elementary sheath terminal and constitute.
The heat of the insulating oil in the sheath terminal isolation part 25 is passed to derailing switch casing 20 via the bolt on the sheath installation portion 201b2 that elementary sheath terminal is fixed on derailing switch casing 201; Therefore; Even to constitute sheath terminal isolation part around the whole mode of the isolated subject portion of elementary sheath terminal, heat can not be stuck in its inboard yet as stated.
In the above-described embodiment, though be provided with sheath terminal isolation part 25 in the inboard of transformer-cabinet, also can be in the arranged outside sheath terminal isolation part of transformer-cabinet.Fig. 5 representes be in the arranged outside of transformer-cabinet 6 sheath terminal isolation part 25 ' the pith of second execution mode of the present invention.In this embodiment, be arranged on being used for rectangular-shaped peristome 41 that window portion 40 that sheath imports forms by a sidewall 6b1 who connects this transformer-cabinet and forming of a sidewall 6b1 of transformer-cabinet 6 from the peripheral part of peristome 41 duct-like protrusion wall portion 42 to LBS one side protrusion.In this execution mode, protrusion wall portion 42 is formed by the metal material identical with the metal material that constitutes transformer-cabinet 6, and protrusion wall portion 42 is installed on the transformer-cabinet 6 through welding.Top in protrusion wall portion 42 is provided with flange 42a; The sheath installation portion 201b2 of derailing switch casing 201 connects across the top of sealing ring 16 with protrusion wall portion 42; The flange 42a on the top of protrusion wall portion 42 is affixed with sheath installation portion 201b2 through bolt 43, and derailing switch casing 201 imports with sheath and is connected with window portion 40.
In this execution mode; From the inboard of transformer-cabinet 6 sheath is imported thermal insulation board 44 that the peripheral part with window portion covers and also dispose, the peristome in the transformer-cabinet of window portion 40 is stopped up through this thermal insulation board with the mode that the inner face with the sidewall 6b1 of transformer-cabinet 6 is complementary.Thermal insulation board 44 is fixed on the sidewall 6b1 through appropriate method such as bonding or screw-drivings.Sheath stopping up thermal insulation board 44 imports the part with the peristome obstruction in transformer-cabinet of window portion; Be provided with the sheath run-through hole 45 that elementary sheath terminal 14u to 14w is connected, elementary sheath terminal 14u to 14w is directed in the transformer-cabinet 6 via the sheath run-through hole 45 of thermal insulation board 44.
In this execution mode, for will constitute with insulating oil 7 sheath terminal isolation part 25 ' protrusion wall portion 42 in fill up, and the unit that the insulating oil 7 that allows in the transformer-cabinet 6 flow into the inboard of protruding wall portion 42 is set on thermal insulation board 44.In the example shown in the figure, the internal diameter in sheath run-through hole 45 is set greatlyyer, and between the inboard girth of this through hole 45 and sheath 14u to 14w, forms the gap, is made up of the unit that allows insulating oil 7 to flow into the inboard of protrusion wall portions 42 this gap.
Under the situation of formation as shown in Figure 5; The isolated subject part 14B1 of breakthrough part 14B is also by isolated with the convection current of the insulating oil that in transformer-cabinet 6, produces in the oil of elementary sheath terminal; Convection current to stop heated insulating oil directly contacts with the part near the sheath installation portion of elementary sheath terminal; Therefore, can reduce the heat that is delivered to the sheath installation portion 201b2 of derailing switch casing from insulating oil 7, the temperature that can suppress sheath installation portion 201b2 rises.In addition, can reduce the heat that is delivered to sealing ring 16 from the sidewall 6b1 of insulating oil 7 through transformer-cabinet and protrusion wall portion 42 through thermal insulation board 44, therefore, the temperature that can suppress sheath installation portion 201b2 rises, and the temperature that suppresses sealing ring 16 rises.
In execution mode shown in Figure 5; Thermal insulation board 44 can be made up of the heat conductivity material lower than transformer-cabinet, and above-mentioned material is a selected material from the material group that constitutes by pressboard, timber, resin, inorganic matter series fiber material, plastics series fiber material and with the composite material of their combinations.
In addition, though not expression among Fig. 5, preferred also the setting in advance combines mechanicalness between the sidewall 6b1 of the top of derailing switch casing 201 and bottom and transformer-cabinet 6, and makes derailing switch casing 201 be supported on the unit on the transformer-cabinet 6 securely.
Claims (5)
1. a ground is provided with the type device for transformer, comprising:
Transformer, it has transformer-cabinet and the transformer body that is contained in this transformer-cabinet; And
The primary side switch device; It is through constituting at derailing switch casing content nanomechanical switch; Above-mentioned derailing switch casing has the high-tension cable connecting portion and the sheath installation portion that the elementary sheath terminal that is connected with the primary side of above-mentioned transformer body has been installed that is used to connect high-tension cable; Above-mentioned switch is used for carrying out switch between above-mentioned high-tension cable and the elementary sheath terminal; The sheath that the sheath installation portion of above-mentioned derailing switch casing contacts across sealing ring on the sidewall that is being set at above-mentioned transformer-cabinet imports on the peripheral part with window portion; Through making above-mentioned sheath import and thereby above-mentioned sheath installation portion is affixed makes above-mentioned transformer support above-mentioned primary side switch device with the peripheral part of window portion; Above-mentioned elementary sheath terminal imports via above-mentioned sheath and is directed in the above-mentioned transformer-cabinet with window portion, and is submerged in the insulating oil in the above-mentioned transformer-cabinet
Be provided with in the type device for transformer on above-mentioned ground; In the inboard of the above-mentioned sidewall of above-mentioned transformer-cabinet above-mentioned sheath is imported the thermal insulation board that the peripheral part with window portion covers; The state that is complementary with an inside surface of side wall with above-mentioned transformer-cabinet is configured
With the part in the above-mentioned insulating oil of being submerged in of above-mentioned elementary sheath terminal at least near the part of above-mentioned primary side switch device as the isolated subject part; The isolated subject part sheath terminal isolation part isolated with the convection current of the insulating oil that in above-mentioned transformer-cabinet, produces with above-mentioned elementary sheath terminal is installed in the above-mentioned transformer-cabinet.
2. ground according to claim 1 is provided with the type device for transformer, wherein,
Above-mentioned sheath terminal isolation part is made up of heat-barrier material, and is one and has: in the inboard of above-mentioned transformer-cabinet so that the sheath that the isolated subject of above-mentioned elementary sheath terminal partly is spaced from each other and opposed up and down mode is provided with and base portion is fixed on above-mentioned transformer-cabinet imports a pair of barrier with the peripheral part of window portion; And the end wall that is provided with the mode between the top ends that connects this a pair of barrier,
Above-mentioned end wall is provided with the hole that above-mentioned elementary sheath terminal is connected.
3. ground according to claim 1 is provided with the type device for transformer, wherein,
The sheath that is arranged on a sidewall of above-mentioned transformer-cabinet imports with window portion to has from a sidewall of this transformer-cabinet to the duct-like protrusion wall portion that above-mentioned primary side switch device side protrudes, and is provided with flange on the top of this protrusion wall portion,
The top that imports with the protrusion wall portion of window portion at above-mentioned sheath connects across the sheath installation portion of above-mentioned sealing ring and above-mentioned derailing switch casing, and the flange on the top of above-mentioned protrusion wall portion is connected with above-mentioned sheath installation portion,
Above-mentioned elementary sheath terminal is directed in the above-mentioned transformer-cabinet via the inboard of above-mentioned protrusion wall portion, and constitutes above-mentioned sheath terminal isolation part by above-mentioned protrusion wall portion,
Above-mentioned thermal insulation board is set to assign to stop up this window portion to above-mentioned sheath importing with the periphery of window portion through covering from the inboard of above-mentioned transformer-cabinet; On the above-mentioned sheath of the obstruction of this thermal insulation board imports with the part of window portion, the sheath run-through hole that above-mentioned elementary sheath terminal is connected is set
On above-mentioned thermal insulation board, be provided with the unit that the insulating oil that allows in the above-mentioned transformer-cabinet flow into the inboard of the above-mentioned protrusion wall portion that constitutes above-mentioned sheath terminal isolation part.
4. according to claim 1,2 or 3 described ground the type device for transformer is set, wherein,
Above-mentioned thermal insulation board is made up of the heat conductivity material also lower than above-mentioned transformer-cabinet, and this material is a selected material from the material group that constitutes by pressboard, timber, resin, inorganic matter series fiber material, plastics series fiber material and with the composite material of their combinations.
5. ground according to claim 2 is provided with the type device for transformer, wherein,
Above-mentioned sheath terminal isolation part is made up of selected material from the material group that constitutes by pressboard, timber, resin, inorganic matter series fiber material, plastics series fiber material and with the composite material of their combinations.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-007569 | 2011-01-18 | ||
| JP2011007569A JP5740687B2 (en) | 2011-01-18 | 2011-01-18 | Ground-mounted transformer device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102611022A true CN102611022A (en) | 2012-07-25 |
Family
ID=46528248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100148372A Pending CN102611022A (en) | 2011-01-18 | 2012-01-17 | Ground setting type transformer device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5740687B2 (en) |
| CN (1) | CN102611022A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105655906A (en) * | 2014-09-27 | 2016-06-08 | 刘洋 | Intelligent media landscape-type buried energy-saving box transformer substation |
| CN113012896A (en) * | 2021-03-11 | 2021-06-22 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Transformer fire protection device and transformer |
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| JP6477671B2 (en) * | 2016-11-17 | 2019-03-06 | トヨタ自動車株式会社 | Coil unit |
| CN107068498B (en) * | 2016-12-16 | 2020-08-21 | 中科电力装备集团有限公司 | Connecting firmware for circuit breaker |
| KR102307655B1 (en) * | 2020-06-11 | 2021-10-05 | 한국전력공사 | Bushing cover of metering out fit |
| KR102565257B1 (en) * | 2021-06-04 | 2023-08-17 | 한국전력공사 | Grounding apparatus for pole transformer |
| US11855421B2 (en) * | 2022-04-21 | 2023-12-26 | Jst Power Equipment, Inc. | Circuit breaker with indicator of breaker position |
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| CN105655906A (en) * | 2014-09-27 | 2016-06-08 | 刘洋 | Intelligent media landscape-type buried energy-saving box transformer substation |
| CN113012896A (en) * | 2021-03-11 | 2021-06-22 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Transformer fire protection device and transformer |
| CN113012896B (en) * | 2021-03-11 | 2023-03-10 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Transformer fire protection device and transformer |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2012151201A (en) | 2012-08-09 |
| JP5740687B2 (en) | 2015-06-24 |
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Application publication date: 20120725 |