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Screw dowel for fastening rails

A type of pin and screw technology, applied in the field of railway sleepers or ballastless tracks, can solve problems such as damage to sleepers, and achieve the effect of long service life

Inactive Publication Date: 2013-09-18
福斯洛工厂有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, water and / or dirt can penetrate the concrete and, as a result, further damage the sleeper due to cracks growing, which negatively affects the service life of the sleeper

Method used

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  • Screw dowel for fastening rails
  • Screw dowel for fastening rails

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] figure 1 The helical pin 10 shown in is composed of a base body 22 made of plastic material and consists of an upper part 16 without an external thread, with an external thread 18 located outside said helical pin 10 and located inside said helical pin The middle portion 14 of the internal thread 28, and the lower portion 12 constitute. The internal thread can also be a circular thread, but differs from the external thread 18 with respect to the flanks and pitch.

[0023] The upper part 16 is substantially cylindrical and is integrally formed with the threaded part 14 and the lower part 12 . On the periphery of the lower part 12 there may be provided form-fitting elements in the form of ribs extending longitudinally along the helical pin, which can be provided after the concrete blocks of the railway sleeper or ballastless track have been poured around the helical pin. Radial twisting of the helical pin relative to the surrounding concrete material is prevented or at l...

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PUM

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Abstract

Screw dowel for concreting into a railway sleeper or ballastless track and frictionally connecting to a sleeper screw, comprising a threaded portion (14) with external thread flights (18) arranged on the outside of the screw dowel (10) and with internal thread flights (19) arranged on the inside of the screw dowel; and an upper subportion (16) without external thread that is situated close to the dowel opening (26) in the installed state; the screw dowel comprises two constituent parts made of different materials, namely a basic body made of plastic and a cylindrical ring (20) made of a steel material and mounted with a form fit and / or force fit.

Description

technical field [0001] The invention relates to a screw-type pin for pouring concrete into railway sleepers or ballastless tracks as stated in the preamble of claim 1 . The invention also relates to a railway sleeper or a ballastless track with at least one helical pin according to the invention. Background technique [0002] Screw-type pins for pouring concrete into railway ties are used in railway engineering to attach rails to ties. In this structure, the rail is fixed to the sleeper through rail screws. The helical pins are usually made of plastic and can be poured into them during the production of concrete sleepers or ballastless tracks. One reason the pins are made of plastic is that the rail screws must be electrically insulated from the ties and because plastic is an inexpensive flexible material that is easy to process and use. [0003] A disadvantage of the construction described above is that a screw-type pin made of plastic usually has mechanical and physical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01B9/18F16B13/12
CPCE01B9/18
Inventor W.贝斯特林格M.哈拉斯D.布雷斯塞
Owner 福斯洛工厂有限责任公司
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