Method for manufacturing high-voltage bushing insulator

FIELD: manufacture of column-shaped high-voltage bushing insulators.

SUBSTANCE: proposed bushing insulator has symmetrical hollow cylindrical external insulator 1 with lead-through head 2 supported by one of its butt-ends and designed for connection to high-voltage supply. Resting on opposite end of insulator is lead-through base 3 designed for connection to ground potential. Proposed method involves sequential fitting of lead-through base 3, external insulator 1, and lead-through head 2 on drawing frame 5; lead-through base 3 rests in this case on insulating case 6. Lead-through base 3 and lead-through head 2 are tightly fitted to one another through drawing frame 5 that mounts insulating case 6. Clamping member 21 made for shifting in axial direction is installed on flange 22 of lead-through head 2 prior to fitting the latter on drawing frame 5; head flange 22 and clamping member 21 are pressed against one another to produce pre-tensioning force. During next fitting of pre-tensioned lead-through head 2 clamping member 21 is secured on end of drawing frame 5 passed through insulator 1, and then clamping member 21 is taken off head flange 22 to form negative allowance.

EFFECT: enhanced economic efficiency in manufacturing high-voltage bushing insulator.

7 cl, 2 dwg

 

The technical field to which the invention relates.

The invention is based on the method of manufacturing a high-voltage bushing according to the restrictive part of paragraph 1 of the claims. Using this method is made is made in the form of a column bushings, which are used for transmission under high voltage conductor through a grounded wall of the housing, for example, of the transformer. Such bushings are hollow cylindrical symmetric outer insulator on one end side of which is configured to connect to the high voltage potential anadromous head, and on its opposite side is made with the possibility of connection to the ground potential flow basis. In addition, the passing insulator includes passing along the axis of the cylinder through the outer insulator lingering tube and attached to a long tube, managing field insulating case.

The level of technology

In restrictive part of paragraph 1 of the claims refers to a method of manufacturing a high-voltage bushings, which is used by the applicant for many years. While lingering on the tube is placed on a point of order made in the form of a mounting flange feed-through basis, the fabrication is hydrated from porcelain or a form-retaining plastic outer insulator and the guide cylinder with the compression spring. This long tube carries managing field insulating housing, which relies on the flow basis. Using a clamping tool guide cylinder pretension keep leaning on the outside of the insulator. On passing through the guide cylinder and having an outer threaded end of a long tube screw the nut all the way into the guide cylinder. After removal of the clamping tool anadromous head and passing the base are connected to each other with the power circuit through the lingering tube and the insulating housing and defined by the compression spring pretension rely on the end side of the outer insulator, so that the inside of the outer insulator hollow space is sealed relative to the outer space and can be filled with an insulating medium.

The invention

The invention as defined in the claims, solves the problem of creating a method of the specified first type, which provides a particularly economical way of manufacturing high-voltage bushings of different sizes and characteristics.

In the method according to the invention, before putting the wall head on lingering pipe flange to the wall head set is configured to shift in the axial direction of saimn the th element, the flange of the head and the clamping element are pressed to each other with the formation of the pre-tensioning force, during subsequent handling of pre-compressed to the wall head on a long case fixed clamping element passing through the outer insulator end of the broaching the chassis, and then remove the clamping element with the flange of the head with the formation of tension. These stages offer a quick and cost-efficient production of high-voltage bushing. There is no need to use additional clamping device, and the preparation is made relatively difficult and, depending on the size and performed bushing insulators task flow heads.

For technical reasons it is advisable to install the clamping element on the flange of the head by means of a screw passing through the threaded hole of the plate head. In this case, it is very easy to operate the screw when mounting bushing. At the same time in this case, the clamping element does not depend widely on the value of the passing of the head and can be used in the manufacture of bushings of any size.

Due to the rotation of the screw while moving lying on a spring clamping plate of the clamping element in the direction of the flange heads can rapidly the eye and reliable way using vintovert to create a preliminary tension, required for Assembly.

It is recommended tightened the guide cylinder provided on the clamping plate is internally threaded to screw on the outer thread of the broaching the body until it stops in the outer insulator. Due to this, it is possible, on the one hand, to use necessary for the normal production and therefore the existing external thread, and at the same time eliminating the need for the tools needed otherwise, for the manufacture of pre-mounted to the wall head.

Then it's very easy to permanently mount the lock insulator. Using a screwdriver, loosen the screw and thereby automatically set on the outer insulator flange of the head and passing the base through pre-compressed springs, pressure plate, long body and attached on the twang building, managing field insulating case.

Because mating thread of the screw is made in the form of end-to-end screw holes, the inner space of the bushing after removal of the screw can be filled through this opening the isolating means. Thus, there is no need to perform additional fill holes for insulating means.

Reliable closing the inner space of the bushing provided which is moved by varying the threaded through hole after filling the insulating material by means of a suitable sealing screw.

Brief description of drawings

Below is a detailed description of the invention on the basis of examples with reference to the drawings, which depict:

1 is manufactured using the method according to the invention, the high-pass isolator with an axial slit to the right of the longitudinal axis, a side view and

figure 2 - section pre-tied to the wall head before installing it in the high-voltage lock insulator according to figure 1.

Ways of realization of the invention

In both figures the same positions marked identically acting elements. Shown in figure 1 high-voltage lock insulator performed according to the type of the column and has a hollow cylindrical symmetric outer insulator 1. This insulator is made of a form-retaining weatherproof material, preferably plastic-based pipes of fiber reinforced multilayer material with silicone shielding or porcelain. At its end facing up side, it shall be made with the ability to connect to high-voltage voltage metal guide cylinder 2. On their facing down the opposite end of the outer insulator based on made with the possibility of connection to the ground potential metal flow basis 3.

Along the vertical por the walking axis 4 of the outer insulator 1 is held in a cylindrical symmetric metal long body 5, which, as shown, may be made in the form of a tube 5, or in the form of a solid pin. At run broaching housing in the form of a long tube last 5 serves for placing under high voltage end of the cable, with screw terminals electrically conductive image is fixed on the upper end of the long tube. If prolonged, the body is made in the form of a pin, then this pin can hold through the end of the cable current.

On the outer surface of a long tube 5 attached managing field, preferably made in the form of input capacitor-type insulating body 6. The insulating housing 6 has an upper made essentially cylindrical and bottom, made essentially conical section. The cylindrical section is located inside the outer insulator 1 and serves to control the electric field through the work of the bushing through the lingering tube 5 under high voltage conductor in the area of the outer insulator 1 and a minimum base 3. Conic section with the work of the bushing is located in the housing, for example, transformer, connected by an electrically conductive manner with reduced base 3, and controls the electric field of the conductor inside nesoversennogo in figure 1 and the od high voltage. Between the two sites managing field insulating housing 6 contains the ledge 7, which is based on passing the base 3. Both ends of the long tube 5 are derived from the inner space of the bushing. At the upper end of the long tube 5 is made of the outer thread 51 which communicates with two not marked in figure 1 by the internal threads of the clamping element 21 passing head 2 and the mounting device 8 for holding an end of the screw clamp through the work of the bushing through the lingering tube under high voltage conductor. At the lower end of the long tube 5 attached ball-shaped control electrode, which serves to equalize the electric field of the conductors, which is extended through the lingering tube 5.

For the manufacture of bushing passage of the base 3 and the outer insulator 1 is placed in order on the lingering tube. In this case, the damper base 3 rests on the stop 7 of the control field insulating casing 6 and the lower end side of the outer insulator 1. Then lingering on the tube 5 is placed checkpoint head 2. When handling the passing of the head 2 on the flange 22 is fixed clamping element 21 so that between the clamping element 21 and the flange 22 of the head acts a certain pre-tension force.

Nafig shows the structure of a pre-tied loop through the head 2. It is shown that in the flange 22 to the wall head is made of two end-to-end screw holes, through which passes one of the two mounting screws 23, and the clamping element 21 is adjacent to the flange of the head disc spring 24 and compressing the Belleville spring 24, the pressure plate 25. Pressure plate 25 contains two unmarked, oriented in the direction of the axis 4 of the bearing, on which rests rotatably one of both of the mounting screws 23. In addition, the presser plate 25 is made of the internal thread 26.

Before putting the wall head 2 on the lingering tube 5 both mounting screw is screwed in the flange 22 of the head. Thus, the presser plate 25 moves downward and thereby compresses lying on the flange 22 of the head disc spring 24.

The same action can be secured using only the mounting screws or by using more than two mounting screws. It is important that the pressure plate is made with the possibility of a shift in the direction of the axis 4. If there is only one screw 23, acting unilaterally pre-tension force must be compensated by using the guide pin, which is used instead of the second mounting screw 23.

Pre-tied so with a preset force checkpoint head is 2 then also placed on the lingering tube 5. While the internal threads 26 of the pressure plate 25 screw on the outer thread 51 of the long tube 5 is fully inserted in the outer insulator 1. When loosening screw connections are pre-compressed disc spring 24 is stretched in the axial direction and directs the presser plate 25 up. While moving still connected with anti-squeak plate 25 through the groove 26, 51 long tube 5 and rigidly connected in turn with a long tube, managing field insulating case 6 is moved upward. Thus, the flange 22 to the wall head 2 and the damper base 3 relative to each other is bonded through the Belleville spring 24, the pressure plate 25, lingering tube 5 and the insulating casing 6 and is installed on the front side of the outer insulator 1.

Remaining inside bushing hollow space 9, limited essentially insulating casing 6 and the inner walls of the outer insulator 1, the flange 22 of the head and through the base 3, the fill of the dielectric considerations insulating means, for example, silicone oil. This insulating means you can fill out a simple way to pass through the screw holes after you completely remove both mounting screws 23. To ensure sealing of the hollow space 9 are not shown on figure 2 sealing oliza between the long tube and the flange 22 of the head, and also not depicted in the figures of the sealing ring between the outer insulator 1, respectively insulating housing 6 and the flange 22 of the head and through the base 3. Staying in the hollow space 9 of the air can be removed through the other of the both end-to-end screw holes. After filling the hollow space 9 through the screw holes can be closed with tight screws.

1. The method of manufacture is made in the form of a column high-voltage bushing, containing a hollow cylindrical symmetric outer insulator (1), based on the one end side of the outer insulator made with the possibility of connection to the high voltage pass voltage head (2)resting on the opposite end side of the insulator (1), made with the possibility of connection to the ground potential passage of the base (3)along the axis (4) of the cylinder through the outer insulator (1), made with the ability to connect to high-voltage voltage lingering housing (5) and mounted on twang building, managing field insulating housing (6)while in the way on a long case (5) is placed in order, passing the base (3), the outer insulator (1) and the guide cylinder (2), pass (3) relies on the insulating housing (6) and communicating the cylinder (2) and p is ochotnoe the base (3) are pressed to each other through a long case (5), characterized in that before putting the wall head (2) long case (5) of the flange (22) passing head (2) establish configured to shift in the axial direction of the clamping element (21), the flange (22) of the head and the clamping element (21) are pressed to each other with the formation of the pre-tensioning force, during subsequent handling of pre-compressed to the wall head (2) long case (5) is fixed clamping element (21) passing through the insulator (1) the end of the broaching of the housing (5) and then remove the clamping element (21) with a flange (22) of the head with the formation of tension.

2. The method according to claim 1, characterized in that the clamping element (21) mounted on the flange (22) of the head using screws (23), passing through a threaded hole flange (22) of the head.

3. The method according to claim 2, characterized in that the pretensioning create due to the rotation of the screw (23) while moving lying on the spring (24) pressure plate (25) of the clamping element (21) in the direction of the flange (22) of the head.

4. The method according to claim 3, wherein the pre-tied the guide cylinder (2) provided on the pressure plate (25) internal thread (26) screw on the outer thread (51) broaching body (5) until it stops in the outer insulator (1).

5. The method according to claim 4, characterized in that the flange (22) of the head and prog is the initial base (3), tied to each other by loosening the screws (23) through the pre-compressed spring (24), pressure plate (25), long body (5) and an insulating case (6), mounted on the outer insulator (1).

6. The method according to claim 5, wherein remove screws (23) and the inner space of the bushing is filled through a threaded hole insulating means.

7. The method according to claim 6, characterized in that the threaded through hole after filling an insulating material closed with gasketed screw.



 

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