DE1816955A1 - Wandering strut expansion, especially for inclined struts - Google Patents

Description

PATENTANWALT BODE 4033 HÖSEL POST BOX TELEPHONE 02102-61701 TELEX 8585166

B 1 - 671 II / Bo

BECORIT GRUBENAUSBAU GMBH. H3 5 Recklinghausen _t Werkstättens tr. 7-13

Wandering face construction , especially for inclined struts

The invention relates to a migratory longwall mining, in particular for inclined strut, which has at least two expansion elements, two of which are attached to the facing Sides by at least one spacing link element are connected, the articulated on both expansion elements

IS is attached.

For use in flat storage, such combinations of extension elements are connected to one another by link elements known. The link elements are here usually arranged at the level of the footplate of the expansion elements and serve to maintain the distance between the two expansion elements as they advance. When moving forward, one of the two expansion elements remains in the bracing between hanging and lying, while the other is released from the tension, is advanced against the dismantling front and at the same time from the link elements at the distance given by the length of the link elements to that in the bracing remaining expansion element is performed.

When using such teams in the inclined or steep storage must not only be taken to ensure that the Base plates of the two expansion elements during the return process

009827/1013

PATENT ADVERTISER BODE 4033 HOSEL POST BOX TELEPHONE 02102-61701. TELEX 8585166

be kept at a predetermined distance, but also for that the expansion elements do not tip over in the direction of the tendency to strut. For this purpose it is known between to arrange two expansion elements one or more additional link elements that are intended to prevent tipping over and for this reason at as great a distance as possible from the Lie-. ends, i.e. mostly at the height of the canopy construction.

The object of the invention is, for a team of the type described above to create a handlebar assembly for the purpose of use in the inclined storage, the with the lowest possible number of link elements both the distance between the expansion elements complies, and prevents the extension elements from tipping over.

The subject of the invention is a traveling longwall, in particular for inclined strut, which has at least two expansion elements, two of which are connected on the facing sides by at least one spacing link element that is hinged to both expansion elements, this traveling longwall characterized in that one or more liagenda Lankerelamente are arranged at the same height in a Höhenbareich χ whose lower limit x ^ corresponds to the 0.65-faehan of the height hj of the center of gravity S _{1 of} the expansion element with extended rams above its base plate and its upper Limit x _? 1.66 times the height h _{2 of} the center of gravity S ^ of the extension element with retracted stamps above its base plate. **

^009827/1013 BADOR ₁ G ₁ NA,

PATENTANWALT BODE - 4033 HÖSEL · POST BOX ■ TELEPHONE 02102-61701 · TELEX 8585166

By the arrangement of the link element or elements in the specified Height range ensures that the handlebars arranged in a single height position simultaneously as Can serve as a spacing between the footplates and as an anti-tip device S. Additional, to be attached at a different altitude Link elements are thus saved. In addition to the resulting structural simplification cheaper care and maintenance of the extension elements.

The specified limits for the area of the attachment height of the link element (s) are to be regarded as the minimum and maximum limits that apply to the moderately inclined storage and extension elements with standing areas of normal width. If, however, the tendency to strut becomes stronger and extension components are used, the footprint of which is narrow in relation to their height, the height range in which the handlebars can be attached can be considerably reduced. In this case, the lower limit X _{1 applies}

x "? H. ^sin ^

1 .. . cos Y ⁵ + sin ψ

AA O

while for the upper limit x "
^ h ₂ . sinf + a. cos Y

/ Uo * ^COsf - ^{+ sin} *

applies, where f is the angle of inclination _{, where y ^ c o is} the coefficient of static friction between the base plate and the horizontal plane and a is the distance between the center of gravity S and the soap edge of the base plate in the plane of the base plate.

The specified limiting equation for the lower limit x ^ shows, like the angle of inclination V ⁷ , the coefficient of static friction η

-U-

0 0 9 8 2 7/1013 BkO

PATENT ADVERTISER BODE 4033 HOSEL POST BOX TELEPHONE 02102-61701 TELEX 8585166

- If.

and the altitude hj of the center of gravity when fully extended Stamps have an effect on this lower limit x *. The width of the footprint of the expansion element remains the same This limiting equation is irrelevant, because when the lower limit x is determined. of the starting point is the case It is assumed that the normal component of the force of gravity of the expansion element is entirely dependent on the reaction forces of the support surface is compensated.

The given limiting equation for the upper limit Xj shows how the angle of inclination Y *, the coefficient of static friction «, the height h »of the center of gravity when the rams are fully retracted and the value a, which relates to the width of the stand area, have an effect on the maximum attachment height x«. In these The limiting equation is the value a relating to the width of the base of the extension element because here the case is considered that the normal component of gravity of the expansion element compensates for the force that the handlebar exerts on the expansion element. In other words, the borderline case is considered in which the Stand surface of the expansion element straight from the support surface takes off.

According to a particularly preferred embodiment of the invention it is provided that the attachment points of the link elements are arranged vertically displaceable on the hiking pillars, the height shift depending on the respective height of the center of gravity S of the expansion element a transmission takes place. Due to the height shift that takes place in this way the starting point of the link element or elements can be achieved that the starting point at any time in his optimal height is within the specified range.

009827/1013

ÖAD ORJGiNAi.

PATENTANWALT BODE · 4033 HÖSEL · POST BOX ■ TELEPHONE 02102-01701 · TELEX 8585166

To the expansion elements according to the invention in different inclined struts and with different extension lengths to be able to use the stamp is provided that as Fastening devices running vertically, several over, 5 perforated strips having holes arranged one another are used, which are attached to the stamps or the side walls of the expansion elements are attached and to which the link element is attached with the help of socket pins.

If the attachment points of the link elements, e.g. are arranged on the extension elements so that they can be adjusted in height by means of a gearbox, or when operating the extension elements, the difference between their retracted and extended height and accordingly the distance between S. and S "is very small, should the handlebars are attached to the extension elements at a certain height x, which is calculated as follows:

_x - _h _ein_f

3 " yu, _o . Cosr + sin F

with Ψ the angle of inclination, .mit / * the coefficient of static friction between the base plate and the horizontal and with h the height of the center of gravity S of the extension element above its base plate, which results from the respective extended height of the extension element.

An example embodiment of the subject matter of The invention is explained in more detail below with reference to the drawing, in which

Fig. 1 two adjacent expansion elements with the for the

Choice of the approach height of the link elements relevant reference values,

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PATENT ADVERTISER BODE ■ 4033 HOSEL · POSTBOX · TELEPHONE 02102-617Q1 - TEjL | X 8585J66

Fig. 2 two adjacent expansions 1 entente with an between arranged them, attached to perforated strips Handlebar element and

Fig. 3 two adjacent expansion elements with one over A gear that can be pushed higher up Handlebar learning no

shows.

The expansion elements shown in the figures each consist of a base plate 1, on which several hydraulic extendable temps ?. ? are attached, which together carry a cap structure 3. Furthermore, each is Expansion element provided with a rear cylinder 5 with its cylinder part is attached to the base plate 1 and its piston rod to a face conveyor or a other abutment attacks, With the help of this rear cylinder 5, the expansion elements after they are out of the bracing are loosened between the hanging and lying walls, pulled forward to the dismantling front.

In Fig. 1 the Bazugsg ^ iesen to be taken into account for the choice of the attachment height of the link elements are entered, namely the center of gravity of the fully extended Äusbaueleraentas with S. ", Its height above the base plate 1 is h. Dar yh: ix ~: iia of the center of gravity.

S ^ from AuBankanca represents "V'piatte 1 i ⁿ ä '~" - ^! Measured at the level of the base plate, it is marked with a. With $ ₂ , the center of gravity of the expansion element is designated when the stamps are moved, while the height of the center of gravity S ₂ above the base plate 1 is designated by h «. The designation f is the angle of inclination of the strut, while χ indicates the height range in which the link element (s) can attack the extension elements. The lower limit

- 7 -

0 0 9 8 2 7/1013 bad ohiginal

PATENTANWALT BODE - 4033 HÖSEL - POST BOX ■ TELEPHONE 02102-61701 · TELEX 8585166

_. 7 -

of the area χ is denoted by x ... , while the upper limit of this area is denoted by x _? is designated.

In Fig. 2 is arranged between the two expansion elements Link element 6 is shown, which is hinged to perforated strips and 7 'which are attached to the opposite Stamp 2 of both expansion elements are arranged. The link element 6 can be attached to these perforated strips 7 and 7 'with the aid of of plug connections 8 and 8 'at different altitudes, which are within the height range χ.

A different type of fastening device for the link element 6 is shown in FIG. 3. Here the points of application of the link element 6 are arranged on slide rails 9 and 9 * which are attached perpendicularly to the punches 2. The slide rails 9 and are connected to the ¹ link element 6 in a tensile and compression-proof manner, but there is a possibility of movement in the vertical direction. This vertical movement can be brought about with the aid of pressure cylinders 10 and 10 '. The pressure medium is supplied to these cylinders 10 and 10 'via a

Gear 11, which depends on the approach path

der'Stempel 2 is controlled. In this way, it is possible to adjust the height of the attachment point of the link element to the most favorable area each time the ster.pel of each extension element is retracted.

Pa_i-e nt claims:

009827/1013 BaO ORMNM.

Claims (1)

PATENTANWALT BODE 4033 HÖSEL POST BOX TELEPHONE 02102-61701 TELEX 858516ε B Ϊ * 671 P a t e η t a n a | r α ο h β i Ι «Migrating longwall structures, especially for sloping Strut that has at least two extension elements » of which two on the mutually facing sides by at least one spacer link element are connected, which is hingedly attached to both expansion elements, characterized in that one or more lying at the same level Steering duck (6) are arranged in a height range χ, the lower limit X _{1 of} which corresponds to 0.65 times the height hj of the center of gravity S _{1 of} the expansion element with extended rams (2) above its base plate (1) and whose upper limit x ₂ 1.66 times the Height h _{2 of} the center of gravity S _{2 of} the expansion element corresponds to retracted ram (2) above its base plate (1). 2 · Wandering longwall construction according to claim 1, characterized marked that * i ^{? h} i ^ ₀ "; cozy + sin f ^ütn h ₂ * sin ^ ♦ a. cos Ψ 2S ^ o * ^{gobY 4 8in f} is, where alt Ψ is the angle of inclination, with μ ά & ρ adhesion »coefficient of friction between the base plate (1) and the horizontal and alt a is the distance of the center of gravity es S from the side edge of the base plate (i) in the plane of the base plate (1 ) is designated. _ 9 _dd 009Ö27 / 1013 PATENTANWALT BODE 4033 HÖSEL POST BOX TELEPHONE 02102-61701 TELEX 8585166 3. Wandering longwall structure according to claim 1 and 2, characterized in that the attachment points the link elements / on the extension elements Are arranged adjustable in height, the height displacement depending on the respective level of gravity ClI) point S of the expansion element via a gear / takes place. t. Migrating longwall construction according to claims 1 and 2, as characterized by that as Fastening devices vertically extending perforated strips with several holes arranged one above the other (7.7 ·) are used on the stamps (2) or the side walls of the extension elements are attached and to which the link element (6) is attached with the aid of socket pins (8, 8 '). 5. Wandering longwall construction according to claims 1 to 3, characterized in that the link elements (6) are arranged at a height x «, where 20th _{x = h} ' ^{COS <f} * ^{Sin f} and with Ψ the angle of inclination, with JU the coefficient of static friction between the base plate (1) and the person lying down and with h the height of the center of gravity S above its base plate (1), which results from the respective extended height of the extension element. 009827Vi013 Blank page