FR2497872A1 - DEVICE FOR THE HYDRAULIC POSITIONING OF THE ETANCONS OF A HYDRAULIC SUPPORT ASSEMBLY - Google Patents

Abstract

POSITIONING DEVICE FOR SEALS IN HYDRAULIC SUPPORT ASSEMBLIES. IT INCLUDES AT LEAST 2, PREFERREDLY 3 INDEPENDENT CYLINDER-CAM-SLIDE ASSEMBLIES, ONE OF THE OTHERS CONTAINING A HYDRAULIC CYLINDER 9 FIXED ON A SOLIDARITY PLATE OF THE BASE WHOSE FREE END: ROD OR PUSHED A MOBILE CAM 6 HAVING IT SHAPED OF A U FLASE WHICH SLIDES ON THE SOLIDARITY PLATE OF THE BASE IN A RECTILINE TRAJECTORY UNTIL A MECHANICAL STOP OF THE CYLINDER AND A SLIDE 14 SYMMETRICAL WITH THE AXIS OF THE CYLINDER, ALSO FIXED ON THE SOLIDARITY PLATE OF L 'BASE AND WHICH GUIDES THE CAM 6. AT LEAST TWO OF THE CYLINDER-CAM-SLIDE ASSEMBLIES HAVE A CONVERGENT OR DIVERGENT ACTION. THIS DEVICE FOR THE HYDRAULIC POSITIONING OF THE SEALS IN HYDRAULIC SUPPORT ASSEMBLIES CAN BE USED IN PUBLIC WORKS AND MINING.

Description

The present invention relates to a hydraulic positioning device

  of a hydraulic support assembly composed of

  articulated on a base by their lower end and on a chain

  skin by their upper end.

  The present invention relates more particularly to a hydraulic positioning device for the retaining stacks used in the

public works and mines.

  It is known that the retaining piles used in the mines consist of a base placed on a first wall, in particular the wall and a cap applied to a second wall, in particular to the roof, and at least two props substantially perpendicular to at least one

  walls, for example on the wall and therefore most

  based. In practice, batteries are used in which 2 to 6

  We are connected to the same base and the same hat. In some cases

  these cells can be connected together and form a set of

  with a higher number of props.

  It is known that when the pile is set up the movements of

  often cause angular displacement of the props

  wearing at the base and / or hat. For example, it is noted at the time of loosening that the stanchion is no longer perpendicular to the base. It is therefore necessary to have a positioning system that allows on the one hand to the struts to undergo without damage an angular displacement and on the other hand allows to automatically bring into position the props

before tightening the battery.

  The description given above relates for simplicity

  to the batteries used in the mines, but it must be understood that the patent extends to all devices comprising struts connected to

  a txtrOmite has a base and at the other end a hat in the-

  The stanchions are subject to angular displacement

at the base and / or the hat.

  Many mechanical or hydraulic devices have been proposed for

  perform the positioning of the props of a support assembly.

  It is known that the hydraulic devices make it possible to adjust the maximum values of the forces exerted to position the props and

  those supported by the device itself during the movement of the walls.

  The present invention relates to a hydraulic positioning device

  props in hydraulic coulllor-

  at least 2 stanchions connected at one end to an

  b, lst, and 'It''t extrumitte to a chap (water characterized by the fact that it

  includes at least 2, I preferably at least 3 sets jack-cam-g] is-

  independent of each other each comprising a hydraulic jack fixed on a support secured to the base of which the free end of the rod or was pushed a movable cam having the firm of a U flared which

  slides on the plate secured to the base in a rectilinear path

  parallel to the axis of the hydraulic cylinder up to the mechanical stop of the cylinder and symmetrical slides relative to the axis of the cylinder fixed to the plate integral with the base andquiguident cam, two at least

  verin-cam-slide assemblies having non-parallel axes.

  The cylinders used according to the present invention are single-acting cylinders whose outer fat may be round or square. They are fixed on

  a plate that is the same as that supporting the slides. The fixa-

  The actuator can be bolted, clamped or placed in an enclosure perpendicular to the plate having a shape such that the actuator can not move laterally or in a direction opposite to the cam. The slides can be constituted by l ,,, mnpilt bent sheet or by a series of vertical rollers held in place by

an upper head.

  According to another embodiment of the assembly, it is the cam which is provided laterally with vertical rollers which roll on slide rails in

rail shape.

  At least 2 cylinder-cam-slide assemblies are used, preferably at least 3. It is possible to use only two cylinders for a two-stud stack when the preferred direction of the forces is known. In all other cases it is necessary to use at least 3 sets cylinder-cam slides.

  The cylinder and the slides of a set are fixed on one

  than. The plates carrying the different sets can be located in different planes or in the same plane. They can be located in a plane parallel to the base or in different planes. This is the case especially when the props are not perpendicular to the base. Indeed, it is preferable to arrange that in the final position,

  when the battery is tightened, when the cylinders of the

  cam-slide are in mechanical stop, the axis of each of the solitary ponds

  lawful is perpendicular to the axis of the (or) cylinder (s) of (or of)

  1 'together) the (s) cylinder-cam-slide corresponding (s).

  I.es. The actuators can be mounted relatively to the base plate, however, to give the device more flexibility depending on the operating conditions and the position of the center of gravity of the strut portion. the cap of the retaining pile, it is possible on the one hand to make the sets verincare-sliding slides Len fixing them on removable plates that can be moved so as to be fixed at variable levels relative to the base, to By means of racks, bolts or nipples, on the other hand, the plates can be fastened to the base in such a way that they can then be fixed to the plates supporting the cylinder-cam-slide assemblies at different points on the plate. so that they can in a plane

  given to make variable angles with the stanchion.

  The operation of the hydraulic positioning device to help

  of the device according to the invention is as follows.

  During the movement of the cleats, the sole being supposed to remain, the movements of the cap cause an angular displacement of each

  stanchion. Cylinder-cam-slide assemblies having convergent actions

  gentes or divergent, one of them is solicited by one of the props.

  If the support force exerted by the strut on the cam is not in the axis of the jack, the stanchion slides on one of the two ramps of the U-shaped cam flared and the cam in moving compresses the cylinder. The

  other stanchions may also slide on the cams of the corresponding unit.

  laying eggs and send them an effort. They can mmne according to the dlirec-

  this effort lose contact with the cam of the enseni) the corres-

  laying. In the latter case the cams remain in position and the associated cylinders in the assembly remain in abutment. When the struts are loosened, the hydraulic supply of the cylinders is effected and those which have been compressed exert a thrust force on the associated cam, one of the ramps of which is in contact at a point (in practice a small zone) with the strut <On . The statistic then moves to the desired end position when the cylinder reaches the mechanical stop.) Danis its position

  final the stanchion is in contact according to 2 gener-atr these with the cortes-

lpolda llt;,.

  Figures 1 to 12 annéxées will better understand the invention.

  FIG. 1 is a schematic top view and FIG. 2 is a view.

  in elevation of a hydraulic assembly of soutit-i.cnt in final position.

  FIG. 3 shows a view from above and FIG.

  same set after movement of the wall. Figures 5 and 6 show in top view and elevation uin

  cylinder-cam-slide assembly according to the invention.

  Figures 7 to 12 show in top view different modes of realization.

particular embodiment of the invention.

  According to the embodiment shown in FIGS. 1 to 4, the support stack comprises 3 props (1), (2), (3) fixed by means of ball joints

  at their lower end to a base (4) and at their upper end

than a hat (5).

  The positioning device comprises 3 sets (I), (II), (III), comprising 3 cylinders (9), (10), (11), 3 cams flared (6), (7), (7), 8) and 3 slides (14), (15), (16). In Figures 5 and 6 we see in more detail the set (I). The cylinder (9) is fixed by its cylinder on the support (12). The latter is secured to the plate (13) fixedly connected to the base (4). The support 12 comprises two panels perpendicular to the support 13 and parallel to the axis of the jack and a panel perpendicular to the preceding located at the rear of the jack. The rod of the cylinder (9) shown in mechanical stop pushes the cam (6) in the slides (14) integral with the plate (13). FIG. 5 shows particularly well that in the final position the stanchion (1) is in contact along 2 generatrices with the

cam (6).

  Figures 3 and 4 show the same positioning device after

  displacement of the wall. The cam (6) has moved under the effect of

  stanchion (1) and the cylinder (9) was compressed. Stanchions (2) and (3) respectively lost contact with the cams (7) and (8) and

  the jacks (10) and (11) remained in mechanical stop. -

  FIG. 7 shows an embodiment of the device according to the invention.

  Lion in which the can-and-slide assemblies are located at different

  rents in relation to the stanchion in planes perpendicular to the axis of the strut, which are not parallel to the emhase

  Figure 8 shows a stack with 4 props and 4 sets of cylinders.

  and those whose actions are divergent. The 4 sets are

  located outside the volume defined by the 4 ponds.

  FIG. 9 shows a stack comprising 4 props and 4 sets of cylinders.

  cam-slides whose actions are convergent. The 4 sets are

  located outside the volume defined by the props.

  FIG. 10 represents a device comprising 5 props and 3

  vdrin-cam-slide semhiles whose actions are divergent..Ls 3

  sets are located within the volume defined by the props.

  FIG. 11 represents a stack comprising 6 stanchions and 4 sets

whose actions are divergent.

  Figure 12 shows a stack with 2 props and 2 ensenmbles

  cylinder-cam rails. The privileged direction of the efforts due to the

  1) Hydraulic positioning device for props in hydraulic support structures with at least 2 props.

  connected by one end to one emblem and the other ex-

  with a hat characterized by the fact that it comprises at least 2, of

  prefeirence at least 3 sets cylinder-cam-slide fixed on a pla-

  that integral with the base, independent of each other, comprising a hydraulic jack fixed to the plate secured to the base and whose free end rod or barrel pushes a movable cam having the shape of a flared U which slides on the solidarity plate of the embasc according to a

  rectilinear trajectory to the mechanical stop of the cylinder and slides

  are symmetrical with respect to the axis of the cylinder, fixed on the plate

  integral with the base and which guide the cam, at least two of the

  cylinder-cam-slides having non-parallel axes.

  2) Device according to 1 wherein the cylinder-cam-slide assembly of a set are fixed on a plate constituted by a removable plate. 3) Device according to 1 or 2 wherein the plates integral with the base or the removable plates bearing the different -HA .., ts

are located in a same plane.

  4) Device according to 1 or 2 wherein the integral plates of the em-

  base or the removable plates carrying the different sets are

  located in different planes.

  ) Device according to 1 in which the cylinder-cam-slide assemblies

  can be fixed at variable levels relative to the base.

  6) Device according to 1 or 2 in which the removable plates support

  both the sets are fixed on a plate integral with the base of

  to be able to make in a given plane varying angles with the

TANCON.