DD223865A1 - DEVICE AND METHOD FOR PRODUCING ELECTRICALLY CONDUCTED TERMINAL CONNECTIONS TO TENANGE MESH - Google Patents

Abstract

The invention relates to a device and a method for producing electrically conductive Klemmanschluesse prestressed concrete pylons using the reinforcing bracing as a grounding conductor or to the foundation earth function. Based on the object of the invention, the object is to provide a terminal connection, which guarantees the necessary for the transmission of high currents defined contact pressure of the connecting elements without thermal overload. According to the invention, the object is achieved in that a device consisting of terminal base with fixed Erdungsduebel and terminal cover with a suitable Distanzstueck placed in the manufacturing process of prestressed concrete mast on two unobstructed reinforcing braces and initially screwed loosely to the formwork. After tensioning the reinforcing braces, a defined contact pressure is applied to the clamping connection from the outside by means of a fastening screw in the grounding sleeve. Subsequently, the concreting takes place according to the known methods.

Description

Title of the invention

Device and method for producing electrically conductive 3CLemmanschlüsse on prestressed concrete pylons

Field of application of the invention

The invention relates to an apparatus and a method for producing electrically conductive XLemm connections on prestressed concrete pylons for the secure transmission of high currents, as occur, for example, in the catenary poles of electrified railway lines.

Characteristic of the known technical solutions

For the grounding of prestressed concrete pylons two fundamental technical solutions are known:

a) Use of a separately inserted earthing conductor with welded or clamped earthing plug, which is arranged in the mast, that to him the grounding of attachments in the upper part of the mast and possibly the connection to other grounding systems (ζ · · · connection to the track at Pahrleitungs Concrete pylons) in the lower part of the

Mast can be done · '

The solution does not use the constructive reinforcement of the mast for the electrical transfer function and is due to the additional

Wendiing one, grounding conductor in the mast material consuming. Often "the required earthing cable is subsequently mounted on the load surface in accordance with the conditions of use (eg for overhead contact concrete pylons).

b) Direct incorporation of the reinforcing steels into the grounding or pounder earthing function by use of a connection clamp (DD-PS 151 245). ν This terminal clamp, which is a tailsclosure with a concrete end wall suitable for receiving a ground connection line. It is pushed onto two adjacent reinforcing bars of the prestressed concrete mast. The subsequent tension of the reinforcement creates an electrically conductive connection. By the anschiie- 'ßenden known spin or Hittelprozeß the clamp in-concrete is embedded · This

.. electrical connection generally satisfies the requirements for the use of prestressing steels as a grounding line / prestressed and medium-voltage masts made of pre-stressed concrete. In the case of these cases, only one sub-base mast is installed. This solution eliminates the need for additional grounding.

When using multiple terminals; in the mast, such. B. for Pahrleitungs concrete pylons -. '_'Required: the. for a good conductive ;, electrical connection required defined contact pressure between the two reinforcing bars and.; the terminals -in accordance with the well-,. th secured method for the production of prestressed concrete pylons. This endangers the safe transfer of high currents (eg short-circuit currents of electric tracks).

The production of an electrically conductive connection after the clamping process is no longer possible with this method.

Object of the invention

The object of the invention is to design an apparatus and a method for producing an electrically conductive terminal connection by utilizing the reinforcing steels as a grounding conductor or to the foundation earthing function so that the production technology for prestressed concrete pylons is not obstructed and any number of ground connections are made possible.

Explanation of the essence of the invention

The invention has for its object to provide a device and a method for producing electrically conductive terminal connections to the reinforcing steels of the prestressed concrete pylons, which are suitable for transmitting high currents, eg. B. short-circuit currents of electrical paths, necessary defined contact pressure without thermal overload of the fasteners guarantee.

According to the invention, this object is achieved in that a device consisting of a terminal base with fixed grounding dowel, an angled at its ends terminal cover and a suitable spacer in the manufacturing process of prestressed concrete mast on two reinforcing steels placed and initially loosely bolted to the formwork. The reinforcing steels can move freely during the clamping process between the overlapping terminal base and the terminal cover. After the clamping process, a defined contact pressure is applied to the clamping connection by tightening a fastening screw in the grounding plug from the outside

and thus the ¹ electrically conductive Elemmansehluß er-. aims · '.;..; , '''. ,

Subsequent concreting takes place according to the known methods

Embodiment, "',.,.

The invention will be explained in more detail below using an exemplary embodiment. In d, en associated drawings shows

Pig · 1 the gate view and top view of a ^Vf prestressed concrete pylon with clamp

! ig · 2 - lock the clamping device in.the ^Λ .

, , ..,. '/ -.'; Form of shell.-... * · ..- ν. /, '·

The terminal cover 2 including Distanzhiilse 3 _: is in the Pertigungsprozeß initially between the two reinforcing bars 4 and the formwork 5 ange- '

arranges * At the end, the terminal base 6 is placed with 'firmly connected grounding dowel 7, whereby the earthing dowel is passed through a corresponding hole in the terminal block and is loosely fastened to the formwork from outside by / the fixing screw 8.

By the terminal floor and the terminal cover> tjbereinandergreifen will be the reinforcement steel enclosed Then 'it in a known

.25. : ¥ tense · ·,;. , ,

Hach the clamping process is the electrical clamping. connection realized in that is tightened by means of the fastening screw 8 in Erdungsdtibel the terminal base on the formwork to the terminal cover and dami't pressed the intermediate reinforcing steel to the terminal base, are.

Claims (2)

"- claim 1 Gate direction for the production of electrically conductive terminal connections on prestressed concrete pylons, marked by a terminal base (6) with fixed grounding plug (7) j a terminal cover (2) angled at its ends with a suitable spacer (3) and one for the production of the terminal connection in the grounding diibel Fixing screw (8) · Method for producing electrically conductive terminal connections on prestressed concrete pylons, characterized in that the terminal base (6) with fixed grounding dowel (7) and the terminal cover (2) with suitable distance piece (3) apply to two unstretched reinforcing bars (4) of the to be manufactured prestressed concrete mast (1) and the formwork (5) is first loosely bolted, then the reinforcing bars are clamped in a known manner, then by tightening the mounting screw (8) in the grounding plug from the outside a defined contact pressure is applied to the clamp connection and then concreting the prestressed concrete mast (1) 'takes place according to the known methods. '/ 2 /..$ 2: m drawings