RU2184042C1 - Contact system-to-rigid crossmember fastening unit - Google Patents

Abstract

FIELD: electrified railway; devices for fastening carrier cable and contact system wires on rigid crossmembers. SUBSTANCE: fastening unit has post with fasteners for securing post on rigid crossmember and cantilever and also upper and lower parallel belts. Carrier cable and contact wires of contact system are installed on cantilevers. Post is made in form of one or two vertical beams rigidly coupled with stop member secured on additional stiffening member of rigid crossmember lower belt and support member secured on additional stiffening member of rigid crossmember upper belt. Post is provided with one or two struts connecting the post with lower belt of rigid crossmember. EFFECT: provision of uniform transmission of load from carrier cable and contact wire to rigid crossmember. 5 cl, 2 dwg

Description

 The invention relates to the field of electrification of railways, in particular to devices for suspension of a support cable and wires of a contact network on hard cross-beams.

 Rigid cross-beams are used as supporting structures when blocking several paths and are installed on supports up to 10 m high. A rigid cross-beam is a spatial metal truss (crossbar) with parallel belts and a slanting grating (see Markov A. S. Contact networks. - M. : 1991, p. 55). The carrier cable is suspended directly on a rigid cross-member on a triangular suspension, which is a round steel rod with ears curved in mutually perpendicular planes. With the help of the ears, the rod is attached to the brackets fixed on the lower belt of the cross members with hook bolts. Contact wires are suspended from the support cable using strings.

 Known mounting bracket contact suspension on cantilever racks (see Markov A.S. Contact networks. - M .: 1991, p. 56), which is the number of essential features closest to the claimed solution. In the known attachment site, the posts are made in the form of welded trusses of two channels connected by trims and fixed to the cross member with hook bolts. The rack has sliding parts made of channels and used to fix the clamp for contact wires, and is equipped with a console with a support cable, and the contact wire is fixed to the rack with a clamp.

 The mounting of the contact suspension - the support cable on the console, and the contact wire using the fixture using the rack of the described design leads to the fact that the rack does not perceive vertical loads from the weight of the support cable and contact wires, and carries only side loads from the contact wires when performing a zigzag "wires and when they are diverted from the axis of the track in anchored sections. As a result, the entire load from the weight of the contact suspension is directly perceived by the rigid cross member.

 Known constructions for mounting a contact suspension on a rigid cross member do not provide synchronous changes in the length of the support cable and contact wires when the ambient temperature changes. In this connection, the height of the suspension of the contact wires relative to the rail heads is changed.

In the process of operating contact suspensions, the following loads act on the rack:
- vertical - from the weight of the supporting cable and contact wires;
- horizontal, arising from the deviation of the bearing cables of contact wires from the axis of the railway track. These loads are especially great in anchored areas, where the deviation of the support cable and contact wire from the axis of the web can reach 6 degrees;
- wind loads and loads from icing, bending moments, in connection with the application of the above loads at the end of the console.

 Since the struts are attached to the rigid crossbeam with hook bolts, all the indicated forces and moments must be perceived by the crossbar, which is not designed for such concentrated loads. This leads to the loss of the bearing capacity of the rigid cross member and, as experience in the operation of such attachment points of contact suspensions, its destruction.

 On straight sections of the railway track, one rack is attached to the rigid cross-member, on the console of which (in this case called the intermediate), one carrier cable is attached, and on the strings and the latch - one or two (for modern highways, two) contact wires. In the anchored areas, two racks with two consoles (in this case called transitional) are attached to the rigid cross-member. One of the racks is designed for suspension of the supporting cable and contact wire (s) running along the axis of the railroad track, the other - for the supporting cable and contact wire (s) going to the anchor support. In the second case, the load on the rigid cross member increases significantly.

 When designing contact networks of modern high-speed railways, strict requirements are laid down for accuracy in the height of suspension of contact wires. Therefore, the known attachment points of the contact suspension on a rigid cross member do not satisfy modern requirements.

 This problem can be solved by using consoles for mounting on a rigid cross-beam both the support cable and the contact wires. This design will ensure constant suspension height, however, this significantly increases the effort on a rigid cross member made of squares, which are deformed under the action of concentrated loads, which leads to a loss of the bearing capacity of the rigid cross member.

 The objective of the invention is the creation of a mount of a contact suspension on consoles (both transitional and intermediate) on a rigid cross member, providing uniform transfer of loads from the support cable and contact wires to the rigid cross member.

 The technical result is achieved by the fact that in the mount of the contact suspension on the rigid cross member, including the rack with its fastening elements on the rigid cross member and the console carrying the cable and contact wires of the contact suspension are mounted on the consoles, and the rack is made in the form of one or two vertical beams, rigidly associated with a thrust element fixed to an additional stiffener of the lower cross-member belt, and a support element fixed to an additional stiffener of the lower cross-belt, m rack is equipped with one or two struts, connecting it with the lower belt of the cross member. The preferred implementation of the stiffening elements on the belts of the cross member in the form of frames, and the thrust and supporting elements in the form of beams.

 Vertical beams are equipped with console mounting elements, which can be made in the form of stops.

 The essence of the invention lies in the fact that both the carrying cables and the contact wires are fixed on the rigid cross member on the consoles. The design of the attachment point of the consoles on a rigid cross-member, according to the invention, provides the transfer of loads from the consoles with the supporting cable and the consoles with contact wires to the side walls of the frames (rigid elements) on the hard cross-belts, which in turn transfer the load to the hard cross-section along the entire length frames and thus unload the rigid cross member from concentrated loads.

 The invention is illustrated in graphic materials, in which Fig. 1 shows a general view of a mount of a contact suspension on a rigid cross member on transitional consoles, Fig. 2 shows a general view of a mount of a mount of a contact suspension on a rigid cross member on an intermediate console. In figure 1 and 2, the contact wires are two, which corresponds to the requirements for projects of modern high-speed railways.

 When mounting the contact suspension on the transitional consoles, the attachment unit contains vertical beams 1, a stiffener on the upper belt of the rigid cross member in the form of a frame 2, a stiffener in the form of a frame 3 mounted on the lower belt of the rigid cross member made of profile steel, struts 4, the lower beam 5, connecting the vertical beams 1 at the bottom, a supporting element 6 mounted on the upper frame 2 and made in the form of beams, a thrust element 7 installed on the lower frame 3 and made in the form of beams, the stops 8 on which I install transitional consoles 9 and 10 for carrying cables and contact wires. The lower beam 5, rigidly mounted on the vertical beams 1, is connected to the lower frame 3 by struts 4 made of pipes.

 When attaching the contact suspension on the intermediate console, the attachment unit contains a vertical beam 1, a stiffener on the upper belt of the rigid cross member in the form of a frame 2, a stiffener in the form of a frame 3 mounted on the lower belt of the rigid cross member made of profile steel, a strut 4 connecting the vertical beam 1 and the lower cross member belt, support element 6 mounted on the upper frame 2 and made in the form of beams, thrust element 7 installed on the lower frame 3 and made in the form of beams, stops 8, on which you installed the intermediate console 9 is poured for fastening the support cable and contact wires.

 In both cases, the lower frame 3 has side walls to which the ends of the struts 4 are rigidly attached, for example, using a square welded across the frame. In the same way, using a square welded across the frame, vertical beams 1 are attached.

 The upper 2 and lower 3 frames and struts of the vertical beams are rigidly attached to a rigid cross member, for example, using bolt brackets 11.

 In the claimed invention, for the distribution of the above concentrated loads along the length of the cross member, racks frames (upper 2 and lower 3) are used. The longitudinal corners of the frames 2 and 3 of the uprights, which are attached to the longitudinal corners of the cross member, uniformly transmit loads along the entire length of the frames without distorting the longitudinal corners of the cross member.

 When installing struts 4 loads in the mount of vertical racks are significantly reduced.

 The implementation of the claimed invention eliminates damage to the cross member when installing cantilever racks and makes it possible to use a compensated suspension of the support cable and contact wires.

 The inventive device has been successfully tested and recommended for mass production and since 2001 it is installed on the hard crossbars of electrified railways of the Ministry of Railways of the Russian Federation.

Claims (5)

 1. The attachment point of the contact suspension on a rigid cross-section, comprising upper and lower parallel belts and a grate, including a rack with its fastening elements on a rigid cross-section and a console, characterized in that the support cable and contact wires of the contact suspension are mounted on consoles, and the rack is made in in the form of one or two vertical beams rigidly connected with a thrust element fixed to an additional stiffening element of the lower belt of the rigid cross member, and a supporting element fixed to the additional element stiffness of the upper belt of the rigid cross member.  2. The attachment point of the contact suspension on a rigid cross member according to claim 1, characterized in that the strut is made in the form of a vertical beam equipped with a strut, rigidly fixed to it and the lower belt of the rigid cross member.  3. The attachment point of the contact suspension on the rigid cross member according to claim 1, characterized in that the strut is made in the form of two vertical beams and is equipped with two struts rigidly fixed to an additional lower beam connecting the vertical beams and the lower belt of the rigid cross member.  4. The mounting of the contact suspension on a rigid cross member according to any one of paragraphs. 1-3, characterized in that the supporting and thrust elements are made in the form of beams.  5. The mounting of the contact suspension on a rigid cross member according to any one of paragraphs. 1-4, characterized in that the additional stiffeners installed on the upper and lower parallel belts of the rigid cross member are made in the form of frames.

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