DE10356887B3 - Cleaning and maintenance equipment for electrical switchgear/transformers, in the 1-36 kV range, has an insulated rod and tube to take working heads in screw fittings as swan necks which can be shaped as required - Google Patents

Abstract

The equipment to clean and maintain electrical switchgear and transformers in a medium voltage range, of 1-36 kV, has an insulated rod (1) or tube (8) with a handle. A working head (9) in a swan neck channel structure is fitted in a release mounting using a threaded bush (10). The swan neck channel has a number of hollow ball joint rubbing units in a stiff structure which can be shaped. A flexible member is passed through the channel, giving a shape stability and a friction lock to the swan neck structure. The flexible member is a plastics tube (12) with a filling.

Description

The Invention relates to an arrangement for cleaning and maintenance of electrical systems in the medium-voltage range, in particular switchgear or transformers, comprising a handle with an insulating rod or insulating tube and means for releasably attaching a working head, the working head is designed as a gooseneck construction, according to the generic term of claim 1.

From the DE 101 27 658 C1 is a device for performing work on systems in the medium voltage range, in particular switchgear, transformers or the like, comprising an elongated tubular tool holder made of an insulating material, which has at one end means for releasably attaching a drive. The tool holder consists of an outer tube and an inner bearing tube, the bearing tube receiving an exchangeable rigid tool shaft made of insulating material. The tool shaft has a permanently connected tool at the end on the working head and an extension or a driver for transmitting force, in particular torque, at the drive end.

With Help with this known solution Different work should be carried out on switchgear can, with all requirements of occupational safety when working under Tension is taken into account. The double tube tool holder there with epoxy potting can not only be used as a handle and guide for a tool shaft Use, but is due to the mechanical stability as a screwdriver, torque wrench or wrench such power transmission Element can be used.

All in all the device described above is very constructive complex and has a not negligible mass, which is what working difficult.

In the arrangement for cleaning and maintenance of systems in the medium voltage range according to DE 199 47 255 C2 an elongated tool holder is again provided, which has at one end a coupling section for releasably receiving a cleaning and maintenance tool that can be pressurized with compressed air and at its other end at least one compressed air connection that can be connected to a compressed air source for the compressed air supply of the tool. The compressed air drive of the respective tool is arranged in a special plastic housing at the end of the tool holder directed towards the system, which offers the advantage that easier handling results with the usual lengths of elongated tool holders.

In one embodiment of the arrangement for cleaning and maintenance of systems in the medium voltage range according to DE 199 47 255 C2 a lubricant dispensing device is explained, with the aid of which a desired amount of lubricant can be applied. This output line can be designed as a gooseneck, so that even lubrication points that are difficult to access can be reached. At the end on the output side, the gooseneck output line has an exchangeable outlet nozzle with a fine sieve in order to retain contaminants that may impair the insulation properties of the switchgear.

It is natural Known gooseneck output line is relatively easy to adjust also difficult to access Lubrication points can be reached, however, via the gooseneck delivery line no powers e.g. applied or transferred for mechanical cleaning. The previously known Gooseneck construction does not provide sufficient mechanical Resistance and deforms when used for cleaning purposes an intense mechanical contact with a surface to be treated becomes.

Of from DEHN + SÖHNE GmbH + Co.KG will use a MS wet cleaning set in accordance with DIN VDE 0681 Part 1 or E DIN VDE 0682 part 621 offered and distributed. The wet cleaning set includes a large number of specially adapted working heads Flat and semicircular sponge shots that require intensive cleaning enable, here the sponge with a special cleaning liquid soaked becomes. The sponges there are held on the working heads using the so-called Velcro fastener technology and it is a torsionally stiff screw coupling as a connection unit for the extensions Angles and working heads intended.

at This known arrangement described above must be very different Working heads of different Shape and shape in stock be kept in order to find the right one for cleaning work on site Device available to have. This is both from the manufacturing point of view as well warehousing and spare parts management are problematic.

From the above, it is therefore an object of the invention to develop a further arrangement Cleaning and maintenance of electrical systems in the medium-voltage range, in particular switchgear or transformers, which, based on a known handle with insulating rod and insulating tube and means for releasably attaching a working head, further develop a gooseneck construction for the working head so that with the help of a working head designed in this way and of a cleaning agent or cleaning agent carrier located on the working head, the necessary cleaning tasks, in particular due to the action of mechanical force, can be carried out, and which allows the shape of the working head to be adapted on site after sighting of the respective technical requirements, without the suitable configuration being obtained from a large number of different working heads held in stock must be selected.

The solution The object of the invention is carried out with an arrangement for cleaning and maintenance of live electrical systems, preferably in Medium voltage range over 1 to approx. 36 kV, according to the characteristics of claim 1, wherein the subclaims at least useful embodiments and represent further training.

The arrangement according to the invention consists of only a few components compared to the prior art and special, flexible working heads, which in turn can be plugged together Have individual elements, the type of the known gooseneck construction can be aligned as desired. For mechanical stabilization the for the The application of the required bending radius is a special integrated one Plastic element provided, which consists of a flexible Plastic part as well as a plastic hose with a suitable Filling material, e.g. Silicone, executed is. This stabilizing element ensures that long-lasting Use of the adjustable individual elements is not undesirable Way a wear and tear Decrease in shape stability when reaching the desired one Working configuration of the head occurs.

Concrete the gooseneck construction of the working head shows a multitude of interlocking hollow ball joint friction elements, which a stiff, but adjustable with a correspondingly greater effort Establish connection.

in the Inside the hollow ball joint friction elements is at least the aforementioned, continuous, shape-stabilizing, flexible, increasing the friction-frictional connection of the construction Plastic part.

The Gooseneck construction of the working head can be multi-armed, in particular two-armed, here again in particular in a Y-shape.

The outer contour the hollow ball joint friction element corresponds to a truncated cone or cone shape so that over this outer contour a sponge pushed or turned over in a particularly easy manner and so that can be fixed. Therefor the sponge has a corresponding recess, which is smaller than the largest outside diameter the hollow ball joint friction elements.

On at least one of the hollow ball joint friction elements can be a tool or a control or fastening means are attached. Conceivable is the use of a cleaning brush as a tool or one Mirror as a means of control or observation.

The flexible plastic part gets into the cavities of the hollow ball joint friction elements pressed in, causing the frictional forces adjustable between the respective ball joints, in particular can be increased are the result of the desired Long-term stability of the gooseneck working head.

The capacity or the filler a plastic tube that increases stability can later variable or be interchangeable. So can with changed operating conditions a filler with adjusted viscosity be used or there is the possibility to adjust the internal pressure, in particular to increase if greater friction or surface pressure forces of Individual elements of the gooseneck construction become necessary.

To the Purpose of wet cleaning can the sponges to be attached to the working head with a cleaning liquid wetted or soaked become.

Under Observation of the technical conditions when working under voltage are the hollow ball joint friction elements of the gooseneck construction made of an insulating material, in particular plastic material.

The Invention is intended below using an exemplary embodiment and under With the help of figures closer explained become.

in this connection demonstrate:

1 a representation of a known arrangement for cleaning and maintenance of electrical systems with a variety of different, each to be selected working heads;

2 an illustration of the gooseneck working head according to the invention with insulating rod and screw fastening connection including a half cut section of the gooseneck construction;

3 a representation similar 2 , but with a gooseneck working head in multi-arm Y-shape;

4 a schematic representation of the pushing of a cleaning sponge on the hollow ball-joint friction elements of the gooseneck construction of the working head and

5 a basic representation of the postponement of possible tools.

The arrangement shown in the figures for cleaning and maintenance of live electrical systems, in particular in the medium-voltage range, is based on an insulating rod 1 , which has a so-called handle in the lower, not shown area.

As the 1 makes it clear that in the known state of the art, a large number of individual solutions of working heads are appropriate for the respective application 2 to 7 necessary, which have to be produced in a very complex and expensive manner. In addition, a large variety of cleaning sponges, each adapted to the appropriate head shape, is required.

In the new, flexible working heads shown figuratively according to embodiments of the invention 9 respectively. 11 is based on a known gooseneck construction.

The Gooseneck construction has a variety of hollow ball joint friction elements, which enter into a rigid but adjustable connection.

According to 2 is inside the hollow ball joint friction elements at least one continuous, dimensionally stabilizing, flexible plastic part that increases the frictional / frictional connection of the construction 12 located.

The actual flexible working head 9 respectively. 11 is a connection element, for example in the form of a threaded bush 10 on an insulating tube 8th , which has a complementary threaded attachment, held releasably. Instead of a threaded connection, there are of course also other non-positive or positive fastening options, for example as a bayonet lock in the sense of the invention.

When designing the flexible working head 11 as a two-arm configuration, deformation can be carried out such that, for example, insulators can be gripped like a pair of pliers, so that the cleaning process can be carried out with the aid of a sponge or similar cleaning agent pushed onto the arms (see 4 ) designed very simple.

The flexible plastic part 12 can also be a plastic tube, for example, which is filled with a silicone or a silicone mixture.

Via the screw connection using the threaded bush 10 there is the possibility of the respective flexible working head 9 or 11 , eg easy to replace for cleaning purposes.

The application of the sponge (s) 13 is done in a simple manner by covering the sponge provided with a recess 13 on the link attachment of the respective flexible working head 9 respectively. 11 , The sponges can have a structured, for example corrugated, surface or contour provided with recesses and recesses, so that the desired cleaning effects result.

It lies in the sense of the invention, the sponge in question with a cleaning fluid to water taking the cleaning liquid according to the rated voltage of the system and the environmental requirements is to be selected. In principle, the working head described above can also be used Use dry cleaning.

In the presentation after 5 is for example a control mirror 14 or a cleaning brush 15 attachable to the front end of the gooseneck construction formed from hollow ball-joint friction elements.

The made of hollow ball joint friction elements with an inner, form-stabilizing Element existing adjustable working head allows by adjustment to the respective surface shapes and contours treat all conceivable system configurations can, without, as previously required from the prior art, a size Number of differently shaped and specified for the use cases working heads available must be kept. By simply pushing on a sponge for cleaning a switchgear, a transformer or the like can also do the otherwise necessary connection using Velcro omitted. Sponges without Velcro are much lighter to clean and reuse. Drying times for the sponges are shortened or can eliminated.

The slip construction of the multitude of hollow Ball joint friction elements with an outer truncated cone or cone shape hold the respective cleaning sponge firmly and securely, without additional fastening elements.

1

insulating

2 to 7

Working heads after the state of the art

8th

insulating with threaded attachment

9.11

flexible working head

10

threaded bushing

12

flexible, shape-stabilizing plastic part

13

cleaning sponge

14

inspection mirror

15

cleaning brush

Claims (14)

Arrangement for cleaning and maintenance of electrical systems in the medium-voltage range, in particular switchgear or transformers, comprising a handle with an insulating rod or insulating tube and means for releasably attaching a working head, the working head being designed as a gooseneck construction, characterized in that the gooseneck construction of the working head comprises a large number of Has hollow ball joint friction elements, which enter into a rigid but adjustable connection, wherein at least one continuous, shape-stabilizing, flexible part, in particular plastic part, increasing the frictional friction connection of the construction is located inside the hollow ball joint friction elements. Arrangement according to claim 1, characterized in that the plastic part consists of a plastic tube with filling. Arrangement according to claim 2, characterized in that the filler is a silicone or a silicone mixture. Arrangement according to one of the preceding claims, characterized characterized that the gooseneck construction multi-armed, in particular two arms is. Arrangement according to claim 4, characterized in that the two-armed design has a symmetrical, in particular Y-shape having. Arrangement according to one of the preceding claims, characterized characterized that the outer contour the hollow ball joint friction elements correspond to a truncated cone or cone shape. Arrangement according to claim 6, characterized in that about the outer contour the hollow ball joint friction elements a cleaning aid, in particular a sponge can be pushed on and fixed. Arrangement according to one of the preceding claims, characterized characterized in that at least one of the hollow ball joint friction elements a tool or a control or observation means attached is. Arrangement according to claim 8, characterized in that the tool is a cleaning brush. Arrangement according to claim 8, characterized in that the control or observation means is a mirror or a Camera arrangement is. Arrangement according to one of the preceding claims, characterized characterized in that the flexible part, in particular plastic part, into the cavities the hollow ball joint friction elements is pressed in, which causes the friction adjustable between the respective ball joints, in particular can be increased are. Arrangement according to claim 2 or 3, characterized in that the filling amount or the filler later variable or is interchangeable. Arrangement according to claim 7, characterized in that the sponge is wetted or soaked with a cleaning liquid. Arrangement according to one of the preceding claims, characterized characterized in that the hollow ball joint friction elements of the gooseneck construction consist of highly insulating plastic or have such an insulation coating.