DD146645A1 - THREE OR MULTI-STAGE CONNECTIONS TO STEEL CABLE BELTS - Google Patents

Abstract

The invention relates to a Seillegeschema in the production of three- or multi-stage, overlapped or pushed endless connections on Stahlseilfoerdergurten. The aim is to achieve a more even transmission of power within the cable groups, and the high force differences of adjacent steel cables should be reduced. This is achieved by changing the length of contact of the longest rope of the rope group in favor of the other rope in such a way that the contact of the longest rope to the opposite ropes is reduced to a maximum of three attachment lengths, without the total sum of the attachment lengths per rope group being reduced overall.

Description

216253

Three or multi-stage connections on steel cord conveyor belts

Field of application of the invention

The invention relates to a Seille scheme in the production of three or more stages, overlapped or butted endless connections on steel cord conveyor belts.

Stepped arrangements of the steel cables in the connection are necessary in the case of butted joints and in the IPalls, when the minimum distance between the cables for the cables of the other end of the belt is less than 1.5 m between the ropes for the intermediate rubber necessary for the transmission of force.

Characteristic of the known technical solutions

In the known compounds, the steel cables of a rope group or a Seillegezyklus are placed in order to the ropes so that, for example, the short or the short and middle ropes transmit only the / (n + 1) th part of the tensile force of the longest ropes. As the number of stages increases, not only the connection length disadvantageously increases, but at the same time a less favorable tensile force distribution occurs within the cable group. This disadvantage, which was recognized in PS 131 274 (GDR) and by changing the ratio of short to long embedded steel cables in favor of the long embedded partial cables.

has been dismantled, also adheres to the trappenweise constructed, purely collided, multi-level compounds in which the cable division over the normal belt does not change, whereby each (n + 1) -th rope outside the compound must be separated and thus not on the power transmission participates in the connection.

Also known are the Oberlappungsverbindungen according to the patents

AS 2 o29 971 (FRG)

AS 2 234 916 (FRG)

OS 2 32o 41o (FRG),

in which, as it were, more or less ropes are separated outside the connection, whereby-but at the expense of the overall strength of the Zugträgers- the number of stages and thus the connection length can be reduced or the embedding length can be increased.

Furthermore, in OS 2 o21 947, in order to increase the connection strength of the three-stage and multi-stage connections, there is the proposal to place all cable ends, with the exception of the shortest, between two cable ends of the other conveyor belt end next to the longest cable end of the other 3? Through this connection, the total length of the cable ends of a group of cables increases, which lie next to the cable ends of a group of the other conveyor belt end. This length significantly affects the connection strength. Certain disadvantages, however, brings the deflection of the individual cable ends with it.

Finally, in the known connection diagrams according to PS 2 223 459 (FRG) the knowledge is used that a certain distance must be maintained only between coming from different directions cable ends for tensile force transmission, while the distance between coming from the same direction cable ends are chosen smaller than the minimum distance can.

-3- 216253

Object of the invention

The object of the invention is to improve the known three- and multi-stage compounds,

Explanation of the essence of the invention

- The task is that a more uniform power transmission within the rope groups comes about and the high force differences of adjacent steel cables are reduced,.

According to the invention, the object is achieved by reducing the length of contact with the masts of the longest rope of the cable group in favor of the other cables. This can be achieved by laying the second or, third-longest rope including the respective mating rope, for example, in the three- or four-stage connection next to the longest rope of the rope group.

The long cables of both conveyor belts are thus no longer unfavorable side by side, the stepped arrangement of the ropes of each rope group runs at increments of mainly two connection stages on both sides.

In the three-stage connection to OS 2 o21 947, although the laying of the ropes, but only seen from one side of the belt, takes place in the same order, the rope ends of the long ropes are laid in a deflected manner. This often leads to bulges in the laying of the ropes in practice, which can be adversely corrected only by removing ropes from the connection.

The degradation of the power transmission differences results - such as tests have shown - other things being equal embedding lengths to higher bond strength, plays a special role this with jointed connections that are required in Zusa mm enhang with the use of metal detection equipment and to achieve a high strength of the tension member in the connection must be executed in several stages.

2162

The percentage of static strength of the tension member in the butted joint is η · 100 $ of the belt strength. η + 1

With reference to the drawing (Appendix 1), the invention is explained in more detail below using the example of the three-stage and multi-stage compounds:

Pig. read Three-stage connection

Fig. 1b; Inventive three-stage compound

Fig. 2a: Four-stage connection

Fig. 2b: Inventive four-stage compound

Fig. 3a: Three-stage collided connection

FIG. 3b: Three-stage abutted connection according to the invention

Fig. 4a: Four-stage collided connection

4b: four-stage joint connection according to the invention,

FIGS. 1 a, 2 a, 3 a and 4 a show conventional overlapping and abutted 3 and 4-stage connections. The rope ends of Fördergurtenden -I and II are, as can be seen, arranged in a staircase in groups of three or four ropes, that each of the longest steel cable compared to the other ropes is a multiple of length next to the masts. In the butted joints, each 4th or 5th rope ends before the connection and is not involved in the transmission of force in the connection. The numbers assigned to the ropes indicate with how many step lengths the individual ropes lie next to the ropes and are correspondingly involved in the power transmission.

By laying the rope pairs Sj <. ι Sjj <. , Sj

S II 4a in the position of the pairs of wires Sj -ih / Sjj i ^ Sj

II 4b corresponding to FIGS. 1b, 2b, 3b and 4b, the high transmission forces to be absorbed by the long ropes are reduced in favor of the remaining ropes.

216253

The numerical values that can be assigned to the transmission of power in the connection change

in connection 1 from 4-1 - 1 to 2 -3 - 1,

at compound 2 of 5-1 - 1 - 1

2-3-2-1,

at connection 3 of 4-1 - 1 - ο

2-3-1 - ο and

at the connection 4 of 5-1 -1 -1 - ο on

2 - 3 - 2 - 1 - o.

The more uniform force transmission leads to an increase in the static and dynamic connection strength and thus to a longer service life of the endless connections.

Claims (1)

-e- 216253 Invention claim. Three or more stages, overlapping or abutting joints on Stahlseilfördergurten, consisting of adjacent groups of steel cables, characterized in that the length of contact of the longest rope of the rope group is changed in favor of the other cables such that the contact of the longest cable to the masts is reduced to a maximum of three connection lengths without the total sum of the connection lengths per rope group is reduced overall. For this / \ page drawing