DE202017104881U1 - Connection element for a grounding connector for concreting into a concrete element - Google Patents

Abstract

Connection element for a grounding connector (50) and / or a cable, for concreting into a concrete element (45), - with a connection surface (11) with connecting means (15) for attaching the grounding connector (50) and / or the cable, - with a from the connection surface (11) inwardly in the concrete element (45) in upstanding and with the connection surface (11) electrically connected or integrally formed electrically conductive spacer member (20), wherein the spacer member (20) has an upper edge (22), which has the greatest distance of the spacer part (20) from the connection surface (11), - with an electrically conductive fastening part (30) welded to the spacer part (20) and which is connected to an electrically conductive grounding element (40) in the interior of the concrete element (45) electrically conductively connectable, wherein the fastening part (30) has a section V-shaped portion, wherein the V-shaped portion of the fastening part (30) has two Flanks which form an angle with each other, the area of the angle being provided inside the V-shaped section of the fastening part (30) for receiving the earthing element (40), characterized in that the fastening part (30) has a total of T-sections. formed with a foot (38) of the T and one of two arms (33, 34) existing crossbar of the T, that one arm (33) of the T with the foot (38) of the T-shaped portion of the fastening part ( 30), that the two arms (33, 34) of the T on their side facing away from the foot (38) each have an outer edge (36, 37), and that the region of the outer edge (36) of an arm (33) of the T-shaped attachment part (30) and / or the area adjacent to the outer edge (36) of the T-shaped attachment part (30) with the upper edge (22) of the spacer (20) is welded.

Description

The invention relates to a connection element for a grounding connector and / or a cable for concreting into a concrete element, having a connection surface with connecting means for fastening the grounding connector and / or the cable, with an inwardly projecting from the connection surface into the concrete element and with the Pad electrically conductively connected or integrally formed electrically conductive spacer, wherein the spacer has an upper edge having the greatest distance of the spacer from the pad, with a welded to the spacer electrically conductive mounting member having an electrically conductive grounding element in the interior of the concrete element is electrically conductively connectable, wherein the fastening part has a section V-shaped portion, wherein the V-shaped portion of the fastening part has two flanks, which enclose an angle with each other, wherein the region the angle is provided inside the V-shaped portion of the fixing part for receiving the grounding element.

Many concrete elements are provided with integrated electrical conductors which are cast in their interior. These are usually grounding elements in appropriately reinforced concrete elements. These reinforced concrete elements are used, for example, as sound insulation walls next to railway lines, in particular alongside the electrified high-speed lines of the railway. The steel reinforcement thus represents a grounding element, often in the form of earthing rods, in particular steel.

These grounding elements in the concrete elements are used, inter alia, to ground the concrete elements and electrically conductively connect to each other. Breaking a high voltage leading overhead wire of the electrified railway line by stress, lightning, abuse or accident or other reasons, so one or both of the thereby liberated ends of the power line with the noise barriers, so the steel reinforced concrete elements, get in touch. The then present very high voltages can be a significant threat to repair or rescue teams that enter this area, as well as for other persons who are authorized or unauthorized in this area.

For this reason, it is urgently necessary to ground the concrete elements and to control such as applied voltages or the resulting currents controlled in the ground. Also, an electrical connection of the grounding elements of adjacent or otherwise different concrete elements is useful for this reason.

The earthing elements in the concrete elements do not protrude out of the concrete itself, as this could lead to corrosion of the earthing elements and also to the ingress of moisture over the weak points thus formed into the concrete elements. Therefore, connection elements are placed in the concrete elements. These connection elements consist of a permanently corrosion-resistant material and ensure an electrically conductive connection of an externally accessible outer surface of the concrete element with a grounding element located in the concrete element. In the production of the concrete element with the grounding element located therein, the connection element is cast into the concrete element in such a way that a connection surface formed by the connection element is exposed on the outer surface of the concrete element. At this outside of the concrete element accessible pad can now later in use from the outside a connection, for example via an insulated cable, for example, a copper cable, take place, the end of which is provided with a tin-plated cable lug, such as a copper lug, which is placed on the pad of the connection element and is screwed with this.

These cables with their cable lugs, for example copper cables with their copper cable lugs, are referred to in the jargon as earthing connectors. Can also be used tinned aluminum cable lugs. A comparable connection used within the concrete element is referred to as a grounding bridge.

Within the concrete element is located after the casting process not only with cast steel reinforcement, or the grounding element, but also the further structure of the connection element. This is conductively connected in a suitable form with the grounding element, in particular by a previous welding of the grounding element to the connection element.

These metallic corrosion-resistant connection elements are thus cast in the manufacture of concrete elements. Before pouring, the electrically conductive connection with the earthing element must be prepared and created.

The production of the plate-shaped concrete elements is usually carried out so that the metallic corrosion-resistant connection element is placed on a flat surface, which is to form the outer surface of the concrete element later, and accordingly serving with the later as a connection surface Side down. As a rule, at least two such connecting elements are provided for each concrete element, which are arranged correspondingly distributed on the base at a large distance from each other. The connection elements are fixed accordingly, then the grounding elements, usually in the form of rod-shaped steel elements, kept at a distance above the base and welded respectively with selected towering parts of the connection elements facing away from the connection surfaces, but with this of course due to the overall metallic connection element electrically conductive are connected.

The manufacturing process of the concrete element is usually carried out in the precast plant or on site in the vicinity of the construction site, where the concrete element is to be used, for example, as a sound barrier. The metal components used are supplied as finished parts. It must therefore be taken into account that the adjustment and welding operations in practice often have to be carried out by the personnel employed under difficult conditions. In the absence of useful assembly aids, a functioning grounding depends on a correct assessment by the personnel employed. Unfavorable space, ignorance or even an incorrect angle estimate can thus easily lead to insufficient grounding. A subsequent correction is not possible in a finished cast component or at least only with extremely great effort.

Many have been used in practice for such purposes sockets to a proposal from the DE 201 01 302 U1 , These sockets for connecting earthing bridges have a body in the form of a stainless steel full cylinder. An axial end face serves as before as a connection surface with a threaded bore extending through the connection surface for receiving a screw. On the opposite end surface of the terminal face a receiving groove is provided which can receive the rod-shaped grounding element of the concrete element and a circumferential circumferential radial recess in the outer circumference of the cylindrical connector prevents the terminal jack are pulled out of the finished cast concrete element in vandalism or otherwise induced forces The moisture can penetrate to the inner grounding element.

The relatively high cost of the stainless steel full material of the cylindrical sockets results in interest in more cost effective solutions. For this purpose, in the DE 203 07 642 U1 also proposed a solution for it. Instead of a cylinder made of stainless steel as a solid material is used on a flat, rectangular stainless steel element as an end face of this vertically upstanding in the later concrete element elongated flat element to weld the grounding element inside the later concrete element. Also from the end face protrudes on the same side, but at another point on an anchoring means, so a steel element that branches in the interior of the concrete element.

In many cases a particularly successful use of the DE 20 2005 003 458 U1 known connection element for a grounding connector and / or a cable for setting in concrete element. A pad is provided with connection means for attaching the ground connector and / or the cable. It has an electrically conductive spacer part that projects upwards from the connection surface into the concrete element and is electrically conductively connected or integrally formed with the connection surface. At the spacer part, an electrically conductive fastening part is welded, which is electrically conductively connected to an electrically conductive grounding element in the interior of the concrete element.

In this connection element at the same time a distance between the later outer surface of the concrete element and the grounding element is ensured inside the finished concrete element. The spacer, which projects from the pad in the interior, provides for this distance, since the fastening part is now welded to that end of the spacer, which faces away from the pad.

In the DE 203 07 642 U1 such an element is missing. There, it must be ensured manually during the welding process that the grounding element to be welded is arranged above the later outer surface of the concrete element.

The successful and well functioning conception from the DE 20 2005 003 458 U1 already largely fulfills the wishes that are made of such connection elements. However, the requirements for noise barriers on high-speed lines of railway lines are also increasing. These are becoming increasingly higher and accordingly stronger in their volume. This means that the overall dimensions increase.

The object of the invention is to propose a connection element that the considerable advantages and good properties of the in the DE 20 2005 003 458 U1 has proposed connection elements and nevertheless, where possible, is also suitable for use in concrete elements with larger dimensions.

This object is achieved by means of the invention in a generic connection element characterized in that the fastening part is formed in total T-shaped with a foot of the T and consisting of two arms crossbar of the T that one arm of the T with the foot of the T Forming the V-shaped portion of the fastening part, that the two arms of the T on their side facing away from the foot each have an outer edge, and that the region of the outer edge of an arm of the T-shaped fastening part and / or the area adjacent to the outer edge of the T-shaped fastening part is welded to the upper edge of the spacer.

Such a connection element has the advantages of the conventional connection elements according to the DE 20 2005 003 458 U1 In addition, however, also has the advantage of being able to extend deeper into the concrete element from the connection surface. Conversely, this has the consequence that the steel reinforcements and earthing elements in the interior of the concrete element can have a larger distance from the outer surface of the concrete element and thus at the same time also from the connection surface of the connection element. So you can lie deeper in the concrete element and are thus better protected against external influences and use in this way the larger dimensions of the concrete elements. At the same time they can also better resist the forces that are exerted on the grounding elements due to the larger dimensions.

The weight of the individual connection elements changes only slightly compared to the prior art. They are therefore hardly heavier and also have largely the same total volume. The material costs are therefore virtually unchanged despite improved application possibilities.

It is a preferably T-shaped constructed angular fastener used, which is preferably made of a section steel. These fasteners are now no longer welded to the area near the resulting angle, but in an area near an edge of one of the two arms of the T-shaped fastener at the top of the spacer, wherein the foot of the T-shaped fastener obliquely away from the pad shows, and can protrude in this way, moreover, with the same components by more than 30 millimeters deeper into the resulting concrete element.

Particularly preferably, it is provided that the T-shaped fastening part is welded so that the edge of the foot of the T-shaped fastening part lies on an imaginary extension line of the solder from the upper edge of the spacer to the connection surface.

In this way, an optimal extension of the connection element is achieved in the depth of the concrete element inside. The particular rod-shaped grounding element, inside the concrete element can thus reach a particularly large distance from the outer surface of the concrete element.

Furthermore, it is preferred if the center of gravity of the fastening part lies on an imaginary extension line of the axis of the connecting means for fastening the grounding connector to the connecting surface.

With this configuration, a particularly stable and balanced arrangement of the connection element can be achieved in the interior of the concrete element. This facilitates in particular the casting process of the concrete.

In addition, it is preferably provided that the angle between the arms and the foot of the fastening part is 90 °.

An angle of 90 ° between the arms and the foot of the T-shaped fastening part is particularly easy to provide manufacturing technology and also to handle the grounding elements also particularly stable and particularly advantageous for the staff used.

To distinguish between a connection element two welding operations. The first welding process takes place at the manufacturer of the connection element. This connects the fastening part with the spacer. This creates the connection element and can be delivered in this form to the customer, that is the manufacturer of the concrete element. For this customer, a second welding process takes place at a completely different location and at a much later time. In this second welding process, the fastening part is now connected to the grounding element in the interior of the later concrete element, ie electrically welded.

The different location and time of the two welding operations has very significant differences in the sequence of these two operations result. While the fabrication of the terminal element is done in a workshop or manufacturing facility that is well equipped with skilled workers, tools, optimum environmental conditions and other requirements, the second welding operation takes place under very adverse external conditions, occasionally only limited available material and often also with workers the welding process only a part of their Pay close attention because they are actually busy with other main work. It should be processed primarily concrete and not metal. Since a certified welder should necessarily be present for this step, this extra must be on site even if he has no other tasks. This is uneconomical.

However, it is precisely these external circumstances that can be used very advantageously by the connection element according to the invention. The fittings are made in the well-equipped workshop, which is staffed by specialists. In this case, a very corrosion-resistant material is preferably used for the connection surface and the spacer part, for example stainless steel. Under certain circumstances, such a material is difficult to weld, which, however, need not be considered here. Since all the welding aids available in the very well-equipped workshop or manufacturing facility can be used to connect this stainless steel to the other component, this obstacle can be overcome relatively easily. Certified welding specialists are also available in the workshop, the external conditions are also comfortable.

For the other part of this first welding process, namely the fastening part, a very good weldable material is used, but this does not have to be corrosion resistant. For this, preferably mild steel, so-called black steel, for example S 235 JRG can be used. The good weldability of this material is not required for the first welding process discussed above, but on the other hand does not bother. It only plays a relevant role in the following.

The entire element thus prepared, ie the connecting element, is now further processed at the construction site for the production of the concrete element. It should now be noted that the connection surface comes to rest after the completion of the concrete element. It turns out that a corrosion-resistant or corrosion-resistant choice of the material of the connection part with the connection surface at this point is of great advantage, since otherwise it may very easily be corroded by the environmental influences (rain, cold, etc.).

The same also applies to the spacer part, which extends from the connection surface inwards into the component. So there are no points of attack for corrosion due to external environmental conditions in this area, which is still adjacent to the surface.

Far inside the concrete element, however, is located after the production of the fastening part of the structural steel. At least 50 mm concrete cover are guaranteed. Here it no longer matters whether this steel of the fastening part or of the grounding element is now resistant to corrosion or not.

Instead, it is here of great advantage that this material in turn is very good weldable, because it is at this point now happens before the completion of the concrete element adjacent to the site, the welding of the grounding elements to the mounting part, for which an existing at the site, cost and Unproblematic welding aid can be used.

Unlike conceptions after the DE 203 07 642 U1 Now it is not necessary to scrap an anticorrosive coating or to remove it with difficulty in order to allow welding at all. It should also be noted that the vapors of the coating are harmful to health during welding. From such a coating can now be dispensed with from the outset, since it is not needed in this area.

Just such an embodiment can also be prepared externally and built as a welded unit.

In addition, it is preferred if the angle between the connection surface and the spacer is 90 °.

Furthermore, it is preferred if the connection surface and the spacer part consist of a corrosion-resistant material, in particular of stainless steel, and the fastening part, on the other hand, consist of an easily weldable material, in particular of a structural steel, for example S 235 JRG. A stainless steel with a thickness of 6 mm has proven to be a very suitable material to take into account high loads due to currents to be dissipated in the area of connection part and spacer.

The invention will be explained in more detail below with reference to the accompanying drawings of some embodiments:

1 a perspective view of an embodiment of the invention;

2 a section parallel to the axis of a threaded bore by an embodiment of the invention; and

3 similar to a cut 1 in an embodiment that is already cast in a concrete element and connected to the ladder.

An in 1 Perspective shown connection element consists of purely optically recognizable essentially three elements, namely a connection part 10 , a spacer 20 and a fastening part 30 ,

These three parts are each metal elements.

The connecting element serves to a particular rod-shaped grounding element 40 inside a concrete element 45 electrically conductive with a rail-type grounding connector 50 to connect a cable or a conductor. For this purpose, both the connection part 10 as well as the spacer part 20 and the attachment part 30 each electrically conductive. They can consist of a steel, the connecting part 10 and the spacer part 20 for example, made of stainless steel, the fastening part 30 on the other hand, for example, made of steel S 235 JRG.

The connection part 10 has a connection surface 11 in the 1 directed upward and is recognizable to the viewer. In the connection area 11 are connecting means 15 for connecting a grounding connector, not shown 50 indicated. These connecting means 15 have, inter alia, an externally accessible for a screw or a similar element hole, such as a threaded hole. This threaded hole (actually technically a mother) is in the 1 on the bottom by a cap 16 covered.

From the connection part 10 protrudes at an approximately right angle, so with about 90 ° bend, a spacer 20 auf, which in the perspective representation in the 1 so extends down. You can see the first bend 21 between the pad 11 or the connection part 10 on the one hand and the spacer 20 on the other hand. In the illustrated embodiment, the connecting part 10 and the spacer part 20 formed integrally with each other.

The spacer 20 ends with one to the pad 11 parallel upper edge 22 ,

At the top edge 22 of the spacer 20 is the fixing part 30 welded. The fastening part 30 is T-shaped. The angle of the T-shaped attachment part 30 is 90 ° in the illustrated embodiment.

The T-shaped fastening part 30 has a crossbeam with two arms 33 and 34 as well as a foot 38 on. The T-shaped fastening part 30 owns a foot 38 perpendicular to the crossbeam and thus to the two arms 33 and 34 stands. The arm gets on his foot 38 facing away from an edge 36 and the arm 34 on his foot 38 opposite side by an edge 37 completed. The cross-sectionally T-shaped fastening part 30 is constant in its longitudinal extent, so that the edges 36 and 37 run parallel to the line connecting the two arms 33 and 34 and the foot 38 forms.

The fastening part 30 is with the first edge 36 of the arm 33 at the top edge 22 of the spacer 20 attached and welded with this.

The welding is done so that the second edge 37 of the other arm 34 on the other side of the pad 11 of the connection part 10 based on the bonding agent 15 lies. The foot 38 therefore protrudes obliquely from the connection surface 11 seen from above. So it lies on the same side of the pad 11 like the edge 22 , based on the bonding agent 15 , At an angle of 90 ° of the T-shaped attachment part 30 this has the consequence that the area of the spacer 20 and the arm 33 enclose an angle of 45 ° with each other. The spacer 20 and the attachment part 30 together form a configuration with the edge 37 of the second arm and / or the base of the foot 38 the maximum distance from the pad 11 of the connection part 10 and therefore the entire connection element particularly far in a direction perpendicular to the pad 11 extends.

A weld 32 lies between the edge 22 of the spacer and the edge 36 of the T-shaped attachment part 30 , This results in the angles between the top edge 22 , the connecting part 10 adjacent inner surface 24 of the spacer 20 and the outer surface 31 of the fastening part 30 a lot of space for the arrangement of the welding aid and the volume of the resulting weld 32 , which can also be attached to increase stability from two sides.

In the angle between the foot 38 and the second arm 34 the two flanks 33 and 34 then becomes a rod-shaped grounding element 40 , For example, from a rod-shaped material, added.

In the 2 the connection element is enlarged and shown from the side or in section.

Again, the top part is the connector 10 with the upwardly facing connection surface 11 to recognize. In the connection area 11 are connecting means 15 provided in the form of a threaded nut, which is down from the cap 16 is covered.

On the left side is the spacer 20 that over the top first bend 21 in particular in one piece with the connection part 10 and over the edge 22 by means of the weld 32 with the fastening part 30 connected is.

The rod-shaped grounding element 40 , which is also referred to as Moniereisen, is again in the amount of fastener 30 in the angle between the foot 38 and the second arm 34 ,

In the 3 Now, the connection element in one embodiment is similar to the 1 and 2 in a finished concrete element 45 to recognize.

It can also be approximately recognized as the concrete element 45 is made and how doing the connection element in the concrete element 45 is placed in it. It is first prepared a pad in the form of a formwork on which the connection element is placed so that the connection surface 11 of the connection part 10 comes to rest below. This means that after removing the pad, the pad 11 at the same time a part of the outside of the concrete element 45 forms. As a result, it is of great advantage, if one for the material of the connection element or the connection part 10 and the spacer 20 takes a massive stainless steel to prevent corrosion. Finally, this area is the outer surface of the concrete element 45 with the connection surface 11 exposed to the weather and the environmental conditions.

By placing the connection element in this orientation, the spacer protrudes automatically 20 from the connector 10 approximately vertically upwards into the concrete element 45 in and on the edge 22 closes by means of the outside of the concrete element 45 approximately parallel weld 32 the fastening part 30 at. This is T-shaped. It lies with one of the arm 33 and the foot 38 clamped upwardly open V-shaped portion of the T-shaped fastening part 30 however stable to the connection surface 11 and ready to receive a rod-shaped earthing element which can be inserted into the formed angle 40 ,

After doing so, the operator can easily a common welding tool between the foot 38 and the arm 33 use an electrically conductive connection between the rod-shaped metallic grounding element 40 and the weldable material of the fastener 30 manufacture. This creates another weld within the V-shaped area.

After this has taken place, the concrete can be poured onto the base or formwork. At the same time, the concrete sheathed both the connection elements including the sitter and the earthing element 40 ,

Will after solidification of the concrete element 45 now the pad removed, lies the pad 11 free. In the field of fasteners 15 Thus, an electrically conductive connection from the outside is possible.

After placing the concrete element 45 at the desired place, for example as a sound barrier next to a high-speed train, can now from the outside grounding connector 50 in a suitable form with the connecting means 15 be connected and thus lead to a practical and reliable grounding of the rod-shaped grounding elements 40 in the concrete element 45 ,

LIST OF REFERENCE NUMBERS

10

 Connecting part, for example made of stainless steel

11

 Connection surface, for example made of stainless steel

15

 Connecting means, for example made of stainless steel

16

 cap

20

 Spacer part, for example made of stainless steel

21

 first bend between connection surface and spacer

22

 edge

24

 inner surface of the spacer

30

 Fastening part, for example made of steel of grade S 235 JRG

31

 Outside surface of the fastening part

32

 Weld

33

 poor

34

 poor

36

outer edge of the arm 33

37

outer edge of the arm 34

38

 foot

40

 grounding element

42

 another weld

45

 concrete element

50

 Earthing connector, cable, conductor

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 20101302 U1 [0011]
• DE 20307642 U1 [0012, 0015, 0036]
• DE 202005003458 U1 [0013, 0016, 0017, 0019]

Claims (7)

Connection element for a grounding connector ( 50 ) and / or a cable for concreting into a concrete element ( 45 ), - with a connection surface ( 11 ) with connecting means ( 15 ) for attaching the grounding connector ( 50 ) and / or the cable, - with one of the pad ( 11 ) inwards into the concrete element ( 45 ) and with the connection surface ( 11 ) electrically conductively connected or integrally formed electrically conductive spacer part ( 20 ), wherein the spacer ( 20 ) an upper edge ( 22 ), which has the greatest distance of the spacer ( 20 ) from the connection surface ( 11 ), - with one at the spacer ( 20 ) welded electrically conductive fastening part ( 30 ), which is connected to an electrically conductive earthing element ( 40 ) inside the concrete element ( 45 ) is electrically conductively connectable, wherein the fastening part ( 30 ) has a section V-shaped portion, wherein the V-shaped portion of the fastening part ( 30 ) has two flanks which enclose an angle with each other, wherein the range of the angle in the interior of the V-shaped portion of the fastening part ( 30 ) for receiving the grounding element ( 40 ) is provided, characterized in that the fastening part ( 30 ) in total T-shaped with one foot ( 38 ) of the T and one of two arms ( 33 . 34 ) existing crossbar of the T is formed that an arm ( 33 ) of the T with the foot ( 38 ) of the T the V-shaped portion of the fastening part ( 30 ) form that the two arms ( 33 . 34 ) of the T on her foot ( 38 ) side facing away in each case an outer edge ( 36 . 37 ), and that the area of the outer edge ( 36 ) of an arm ( 33 ) of the T-shaped fastening part ( 30 ) and / or the area adjacent to the outer edge ( 36 ) of the T-shaped fastening part ( 30 ) with the upper edge ( 22 ) of the spacer ( 20 ) is welded. Connection element according to claim 1, characterized in that the connection surface ( 11 ) and the spacer ( 20 ) made of a corrosion-resistant material, in particular of stainless steel, and the fastening part ( 30 ), however, consist of an easily weldable material, in particular of a structural steel, for example S 235 JRG. Connecting element according to claim 1 or 2, characterized in that the T-shaped fastening part ( 30 ) is welded so that the edge of the foot ( 38 ) of the T-shaped fastening part ( 30 ) on an imaginary extension line of the solder from the upper edge ( 22 ) of the spacer ( 20 ) to the pad ( 11 ) lies. Connecting element according to one of the preceding claims, characterized in that the center of gravity of the fastening part ( 30 ) on an imaginary extension line of the axis of the lanyard ( 15 ) for attaching the grounding connector ( 50 ) on the connection surface ( 11 ) lies. Connecting element according to one of the preceding claims, characterized in that the angle between the arms ( 33 . 34 ) and the foot ( 38 ) of the fastening part ( 30 ) Is 90 °. Connecting element according to one of the preceding claims, characterized in that the fastening part ( 30 ) is formed of a shaped in T-shaped section steel. Connecting element according to one of the preceding claims, characterized in that the angle between the connecting surface ( 11 ) and the spacer ( 20 ) Is 90 °.

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