HU181278B - High-voltage bushing isolator - Google Patents

Abstract

The invention relates to a high voltage Drahteinfuehrung bell, which is compared with known Ausfuehrungen, much easier to manufacture and assemble, the electrical strength and safety fully complies with the prescribed requirements. The insulating body encloses a cavity whose longitudinal axis runs parallel to the longitudinal axis of the current conductor (current conductor), the interior of the cavity being divided into two parts by a dividing wall perpendicular to the longitudinal axis. The insulating body according to the invention is designed such that it consists of two or more walls at least along two opposite sections of the shell of the passage cavity, in such a way that the outer wall (34) encloses at least one inner wall (35) and the insulating body (32). of two, along the Teilflaechen (36 a, 36 b, 37 a, 37 b) adapted to each other Halbkoerpern is formed, wherein the formed in the outer wall outer Teilflaechen are moved relative to the formed in the adjacent inner wall inner Teilflaechen along the circumference of the walls.

Description

Thus, the high voltage split passage insulating body according to the invention is designed to form two half bodies which can be joined to each other along the longitudinal axis of the conductors practically parallel to the dividing surfaces, and these half bodies form interlocking insulating umbrellas; the small air gaps remaining along the fitting dividers after assembly can only be connected to each other through a relatively long air gap (s) or creep stream (s). In the case of mounting the insulating half bodies, the inserts that are in contact with the conductors can be secured in a form-locking manner (this can be done by a person skilled in the art and will not be discussed below). The insulating body is surrounded by a longitudinal cavity parallel to the longitudinal axis of the conductor along a substantially circumferential circumference, because the splitting causes the air gap on the dividing surface to be a small fraction of the circumference.

The cross-section of the conductors is often rectangular, circular, circular or U-shaped. Preferably, the shape of the insulating bodies can be chosen accordingly, although this is not required. In this case, the cross-sectional profile of the interlaced hollow elements perpendicular to the longitudinal axis of the conductor is a circular ring, interlaced (flattened) U-section or other similar type.

With such a design, the conductors can be lifted immediately into their position perpendicular to their longitudinal axis, and the insulating body can be mounted directly on them, without longitudinal threading.

Before the structural features and embodiments of the insulating body according to the invention are described in more detail with reference to the drawings, the consideration underlying the inventive idea is also illustrated with reference to the drawings.

Figure 1 is an exemplary one-piece insulating body according to the prior art. in the mounted state, i. e. Figure 1b is a sectional view of the longitudinal axis of the current conductors shown in the section; FIG. THE

Fig. 2 shows a simplified sectional view of the transfer insulator in a plane parallel to the partition. Fig. 3 shows an embodiment of a passage insulator according to the invention in which both the outer and inner walls are rotationally shaped. Fig. 4 illustrates an embodiment of parallelogram cross-sectional insulators according to the invention. Fig. 5 shows an equivalent embodiment of the insulating body according to the prior art of Fig. 1.

The idea of the invention was given by the following consideration: the conductor insulators are used to conduct conductive current (s), which are normally energized or energized, mainly on a grounded conductive partition wall, e.g. a metal plate. The conductive insulator must also withstand high mechanical stress with high electrical loads. The insulating body 12 of the prior art passage insulator 12 surrounds the conductor (s) 11 2 as tubular, bush, disc or box shaped bodies in the vicinity of the bulkhead. The support 12 provided in the insulating body 12 will hold the mounted conductor (s) 11. The support may be a spacer 18 for the partition wall 18 formed in the insulating body 12, or between the dummy body 12 and two adjacent conductors 11. As used herein generally uniformly writing partition wall 18 instead of the abutment possible different embodiments, since in practice the stakes ₁₀ also act as such a wall-mounted state. Spatial separation also extends to the surrounding airspace outside the cavity surrounding the cavity; Fig. 1 shows that the outer wall wall partition fits with the wall 13.

₁₅ The lb. Figure 11 shows the shortest distance L1 between the conductor 11 and the partition wall 13, the distance La, expressing the thickness of the wall of the insulating body 12 in this path, and the shortest L _k distance between the air conductor 13 and the wall 13 in the air dielectric. The exemplary insulating body 12 is a wall rotational body, the axis of rotation being the longitudinal axis of the cavity surrounded by it.

The 12-insulator can fulfill its intended purpose, 25 when the 11 current driver (s) and the shortest L _l distance electric strength between 13 partition (which is present along the Ld distance greater than air fixed dielectric and present in the _L-La distance air dielectric strength resultant form) 30 than the values specified in the standard and medium kind shortest distance L _k distance in air (which is substantially longitudinal distance h from the wall of the insulator body 12 defines) provides an electrical strength, which is equal to or exceeds the standard elő35 written. Generally speaking, these conditions are met in a reciprocal relationship that, in addition to their existence, the electrical strength associated with the L _k distance is less than that of the L1 distance, so that the possible impact is not in the material of the islet 40 of the island 12 but in the surrounding air.

The least important feature of the insulating body 12 is the creep stream: the smallest distance between the earthed partition wall 13 and the conductor 11 along the surface of the insulator (the minimum length of the length is determined by _the distance L _k ). The length of the creep stream for the used insulating insulators usually reaches the value specified by the standard 50 for the given insulator.

It will be appreciated by those skilled in the art that, when the insulating body 12 is made of two half-bodies and the assembly of the half-bodies, the strength gap 55 is inevitably present at the distribution surfaces. Such electric spaces are multidimensional spaces, so they usually tend to have maximum symmetry in divisions; however, in the case of a clearly divisible division on one of the diverging planes, due to the opposing air gap 60, the insulation distance is shortened so significantly that, due to the obvious disadvantage, the use of split bodies has been neglected.

We have realized that this is an unreasonable prejudice. Even the two halves can be mirrored to another ⁶⁵ and at that location

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8ÍZT8T reaches the internal partition wall 58c. The respective adjacent two walls on the one hand are wall 58a and wall 58b, on the other hand wall 58b and wall 58c are displaced relative to each other along the longitudinal axis ω.

Figure 5 illustrates the displacement of the dividing surfaces of the dividing surfaces 5, the increased insulation distance obtained by the screening, and by ensuring that the walls of the space separator 58a, b, c are shifted in the axial direction to the appropriate length of the creek path and to connect the large air gap to the small air gap. 10 slots.

An outstanding advantage of the high-voltage split-pass insulator according to the invention is that, unlike conventional insulating bodies, it can be assembled on site in a very light and simple manner without compromising electrical and mechanical strength and safety. It is also easy to replace the insulating body afterwards.

A distinct advantage to the half-body itself is formed by a favorable geometry of this solution, which is interchangeable with the insulator different sized electric conductors easily ²⁰ and can be easily manufactured and himself, only to be matched to the respective conductor size selected deposits. Bushing according to the invention does not require ²⁵ unplanned maintenance.

Claims (4)

Patent claims: 1. High-voltage conductive insulating conductors, preferably current conducting rails, the insulating body of which is surrounded by a longitudinal cavity parallel to the longitudinal axis of the conductor (s), while its air space ³⁵ is supported along a plane perpendicular to the longitudinal axis. partition wall, insert) into two dividers (k), characterized in that the insulating body (32, 42, 52) - along at least two opposite sections of the through cavity shell - two ⁴⁰ or more walls such that the outer wall (34 , 44) encircling (at least) an inner wall (35, 45) and the insulating body (32, 42, 52) with two half-bodies (32a, 32b, 52a, 52b) fitting along each other (36a, b; 37a, b) ) is formed so that the outer wall formed ^{of 45} ban (34, 44) of the outer dividing surfaces (36a, b) inner dividing surfaces formed on the (neighboring) the inner wall (35, 45) (37a, b) relative to - the walls (34, 35, 44, 45), and outer and inner partition walls (58a, b) formed on or adjacent to the outer wall of the insulating body (52, 32, 42) and to the outer wall (34, 44). ) fitting an inner partition wall (58b) to the inner wall (35,45) of the insulating body (52) is shifted along the longitudinal axis of the cavity relative to the inclined internal partition wall (58c). 2. An insulating bushing according to claim 1, characterized in that both the outer and the inner walls (34, 35) are shaped as rotary bodies, the axis of rotation of which is the longitudinal axis of the cavity (ω) and the outer wall (34). the outer dividing surfaces (36a, b) are formed along one of the two opposing lines intersected by one of the half-planes (γ) passing through the axis of rotation, while the inner wall (35) coaxial with the outer wall (34) divides (165 °) α> 15 ^ο ) the inner dividing surfaces (37a, b) are formed along two closing lines cut out by another half-plane (β) passing through the axis of rotation. An insulator according to claim 1, characterized in that the parallelogram, preferably with rounded corners, of a cross-section of both the outer and inner wall (s) (44, 45) in a plane perpendicular to the longitudinal axis (ω) of the cavity, preferably a rectangle is formed on the two opposite sides (44a, 44b) of the outer wall (44) and the inner dividing surfaces (37a, 37b) are formed in the inner wall (45) such that the respective adjacent outer and, of the inner dividing surface (36a, 37a), the outer dividing surface (36a) falls into one space (λ ₂ ) cut by a half plane (δ) perpendicular to these sides, and the inner dividing surface (37a) into the other space (λι). An insulator according to claim 1, characterized in that the circumference of the cross-section of the insulating body (42), which is perpendicular to the longitudinal axis of the cavity (ω), delimits a parallelogram, preferably rectangular, having two opposite sides formed on the meniscus. the outer wall (44) and, within, one or more walls (45, 46) and the respective outer wall (44) and the inner wall (45, 46) adjacent thereto are provided with an outer or inner partitioning surface (36a, 37b) so that the outer partition surface (36a) is cut into one space (λ ₂ ) by the half-plane (δ) perpendicular to these walls (44, 45, 46), and the inner partition surface (37b) into the other space (AA). ) falls.