CN2110310U

CN2110310U - Circuit choked wave apparatus

Info

Publication number: CN2110310U
Application number: CN 91231273
Authority: CN
Inventors: 杨清; 李仲宁; 朱梦熊; 李镇建
Original assignee: Institute Of Mechanical And Electrical Engineering For Geological Exploration Ministry Of Water Resources Ministry Of Energy
Current assignee: Institute Of Mechanical And Electrical Engineering For Geological Exploration Ministry Of Water Resources Ministry Of Energy
Priority date: 1991-12-18
Filing date: 1991-12-18
Publication date: 1992-07-15

Abstract

The utility model discloses a circuit trap capable of providing channels for carrier communications and relay protection in a high voltage transmission circuit. A main coil comprises an inner and an outer layers of a plurality of parallel insulating wires which are wound; an inner layer coil for transposition is inlaid in the groove of a lower pressing strip; a middle pressing strip is nested on the lower pressing strip, and an outer layer coil for transposition is inlaid in the groove of the middle pressing strip; an upper pressing strip is nested on the middle pressing strip, and a reinforcing ring is fixed in the upper pressing strip; an upper and a lower conducting rows are integrally formed with an upper and a lower suspending frames respectively, the upper and the lower suspending frames and the main coil are connected into an entire framework construction by a tension device, and tuning elements are arranged in two insulating cylinders. Accordingly, the utility model has the advantages of small size, low loss, good mechanical property, complete product specification and unbreakable elements.

Description

Circuit choked wave apparatus

The utility model belongs to the power equipment category, relates in a kind of ultra-high-tension power transmission line the device that passage is provided for carrier communication and relaying protection.

The domestic existing line trap, be by main coil, tuned cell, protective device composes in parallel, main coil is by in the parallel connection, the coil of outer two-layer helix shape constitutes, fix by supports insulative member press strip group and cushion block group, protective device and tuned cell are installed on the following suspension bracket of main coil central space, the hanging piece pull bar compresses main coil, on making, following suspension bracket and main coil are unified into an integral body, product is an Open architecture, main coil adopts the plain conductor coiling, considers the kelvin effect and the eddy current loss of lead, can not and too many around radical, so when the big current coil of coiling, need with double helix or many spiral way, the main coil volume is big like this, and small product size is big, eddy current loss is also higher simultaneously, press strip group bolt, the product periphery does not have radial support, and mechanical performance is relatively poor, product specification is incomplete, the have relatively high expectations product of specification of the specification of still short 330KV and above transmission line and short time current; Tuned cell (main capacitor, resistance, inductor, pair capacitor, require to increase some inductors, capacitor, resistance according to passage) all be contained in the insulating cylinder, main capacitor is in parallel with main coil, its both end voltage is higher, under impulse overvoltage, easily and between the contiguous element electric discharge phenomena taking place, causes the damage of element.

The purpose of this utility model provides a kind of line trap of new structure, and it has, and volume is little, loss is low, good mechanical property, product specification is complete, element is not fragile.

The purpose of this utility model is achieved in that a kind of line trap; it is by main coil; tuned cell; protective device composes in parallel; main coil is by in the parallel connection; the coil of outer two-layer helix shape constitutes; every layer line circle is become by many insulated wires and winding; the inner coil that carried out transposition is embedded in down in the press strip groove; middle press strip is nested in down on the press strip; the outer coil that carried out transposition is embedded in the middle press strip groove; ceiling molding is nested on the middle press strip; reinforcing ring is fixed among the ceiling molding groove; last busbar and over sling constitute one; following busbar constitutes one with following suspension bracket; take-up device will be gone up; following suspension bracket and main coil are unified into a general frame structure; protective device and tuned cell are installed in the main coil central space; the main capacitance of tuned cell places in the insulating cylinder, and all the other elements place in another insulating cylinder.

The utility model has the advantages that: the current as main coil adopts the insulated wire several paralleled conductor, reduced lead eddy current loss, coil carried out transposition, eliminated circulation loss between lead, thereby small product size is little, loss reduces, reinforcing ring places outside the press strip group, improved mechanical performance, main capacitance is arranged separately in the insulating cylinder, all the other elements are installed in another insulating cylinder, have strengthened insulation distance, have improved the whole shock resistance overvoltage of tuned cell ability, element is not fragile, and product specification is complete.

Fig. 1 is the utility model circuit theory diagrams.

Fig. 2 is the utility model front view.

Fig. 3 is the utility model vertical view.

Fig. 4 is the utility model main coil cutaway view.

Fig. 5 is the mutually nested assembling schematic diagram of the utility model upper, middle and lower press strip.

Fig. 6 is the utility model upper, middle and lower press strip schematic diagrames.

Below in conjunction with accompanying

drawing

1,2,3,4,5,6 and specific embodiment the utility model is done and to be described in further detail:

As shown in the figure, a kind of line trap, it is to be composed in parallel by main coil 1, protective device 2, tuned cell 3.Main coil 1 is made of inner coil 7, the outer coil 11 of parallel connection, and every layer line circle is become by many insulated wires and winding, and coil is set to single-screw or double helix by the size of current-carrying.

For single spiral coil, inside and outside layer line circle has been used coil transposition technology " 2.1.2 " transposition in the field transformer respectively, makes every current in wire distribution basically identical.The lead of inside and outside layer line circle is also identical around radical, but outer coil 11 numbers of turn are less than inner coil 7 numbers of turn, makes the CURRENT DISTRIBUTION unanimity of inside and outside layer line circle.

Making single-screw (below 1250 peaces as rated current, specified inductance 1 the milli enjoy following) coil the time, to play press strip 8 evenly to fix earlier along the winding former circumference, then around inner coil 7, around to 1/4th number of turn places of total number of turns the time, the lead of parallel connection is divided into two groups of transpositions, around to 1/2nd number of turn places of total number of turns the time, carry out standard transposition (promptly in certain of coil, with the position of several leads of parallel connection fully symmetry exchange, once finish), around to 3/4ths number of turn places of total number of turns the time, again lead is divided into two groups of transpositions.Inner coil 7 carried out being embedded in down in press strip 8 grooves after transposition winds, middle press strip 9 is nested in down on the press strip 8, then with the same contrapositive form of inner coil 7 around outer coil 11, the outer coil 11 that carried out transposition is embedded in middle press strip 9 grooves, on the press strip 9, the insulated binding band was wrapped among the groove of ceiling molding 10, fills up groove during ceiling molding 10 was nested in, after the baking and curing, form reinforcing ring 12.

For double-spiral coil, used the even coordinated transposition of coil transposition technology (transposition number equals the radical of parallel conducting wire, and each transposition is evenly distributed on the coil) in the field transformer equally, the number of turn of outer coil 11 is less than inner coil 7.Like this, reduce eddy current and circulation loss between lead and lead, also reduced the circulation loss of ectonexine coil.

Making double helix (more than 2000 peaces as rated current, specified inductance is enjoyed above coil at 0.2 milli) during coil, to play press strip 8 evenly to fix earlier along the winding former circumference, around inner coil 7, around to first transposition the time, lead in the top of first spiral is moved to the top of second spiral, simultaneously lead in bottom of second spiral is moved to the bottom of first spiral; When around the time to second transposition, again lead in the top of first spiral is moved to the top of second spiral, simultaneously lead in bottom of second spiral is moved to the bottom of first spiral; Repeat aforesaid operations, at last, successively every lead of first spiral is changed to second spiral by whole transpositions, simultaneously every lead of second spiral is changed to first spiral, and then gain original position separately, inner coil 7 carried out transposition and was embedded in down in press strip 8 grooves after winding, middle press strip 9 is nested in down on the press strip 8, with the same contrapositive form of inner coil 7 around outer coil 11; In press strip 9 grooves, on the press strip 9, the insulated binding band was wrapped among ceiling molding 10 grooves, fills up groove during ceiling molding 10 was nested in being embedded in after the outer coil 11 that carried out replacing winds, and formed reinforcing ring 12 after the baking and curing.

The upper, middle and

lower press strip

10,9,8 of insulation material is mutually nested, and the three is fused with insulated bolt, form the press strip group, main coil 1 constitutes the axial support and the radial support of main coil 1 respectively by many groups press strip group and reinforcing ring 12, axial support, radial support, main coil constitute a general frame structure by over sling 6, following suspension bracket 4 and take-up device 15, we claim that this constructed products is a semi open model general frame structure, and its mechanical strength improves greatly.Between the inside and outside layer line circle axial ducts are arranged, between every circle line the radial passage is arranged, the insulated binding band is not directly to be wrapped on the lead, but and certain distance arranged between lead, these have guaranteed that all main coil 1 has good heat dissipation environment, the hear rate of main coil 1 by axially and radial passage and surrounding air carry out heat exchange, reduced the temperature rise of main coil 1.

Protective device 2 is installed on the following suspension bracket 4 in the main coil 1, and 5 links with over sling 6 by going between, and forms in parallel with main coil 1.

Tuned cell 3 adopts double-cylinder type, tuning main capacitance places in the tube, all the other elements place in another tube, two parallel connections, tube selects for use glass fibre reinforced plastic insulating material, element to install the tube sealing, is installed in the main coil 1, and 5 be connected with upper and lower suspension bracket 6,4 by going between, form in parallel with main coil 1.

Last busbar 13 places the top of main coil and over sling 6 to be one, and following busbar 14 places the bottom of main coil 1, with following suspension bracket 4 be one.As required, following busbar 14 can be set up one, and the product of 300kv and above line voltage distribution grade is equipped with grading ring, and places outside the upper and lower suspension bracket 6,4.

Claims

1, a kind of line trap; it is to be composed in parallel by main coil, tuned cell, protective device; main coil is made of the coil of the inside and outside two-layer helix shape of parallel connection; every layer line circle is become by many insulated wires and winding; main coil is fixed by the supports insulative member; protective device and tuned cell are installed in the main coil central space, it is characterized in that:

A. the inner coil 7 that carried out transposition is embedded in down in press strip 8 grooves, middle press strip 9 is nested in down on the press strip 8, the outer coil 11 that carried out transposition is embedded in middle press strip 9 grooves, ceiling molding 10 is nested on the middle press strip 9, reinforcing ring 12 is fixed among ceiling molding 10 grooves, last busbar 13 constitutes one with over sling 6, and following busbar 14 constitutes one with following suspension bracket 4, and take-up device 15 is unified into a general frame structure with over sling 6, following suspension bracket 4 and main coil 1;

B. the main capacitance of tuned cell 3 places in the insulating cylinder, and all the other elements place in another insulating cylinder.