FR2519373A1 - DEVICE FOR MONITORING THE STROKE OF HYDRAULIC CONTROL CYLINDERS OF AN UNDERGROUND FELLING PLANT, IN PARTICULAR A PLANED FELLING PLANT - Google Patents

Abstract

THE INVENTION RELATES TO A DEVICE FOR MONITORING THE STROKE OF THE HYDRAULIC CONTROL CYLINDERS OF AN INSTALLATION FOR ADJUSTING THE CUTTING HORIZON OF AN UNDERGROUND FELLING MACHINE AND IN PARTICULAR OF A PLANE. THE MONITORING DEVICE INCLUDES A COMMON SIGNALING APPARATUS 21 INTENDED FOR A GROUP OF CONTROL CYLINDERS 14 WHICH ARE CONNECTED TO THE SIGNALING APPARATUS VIA TRANSMISSION ELEMENTS 23 SUCH AS BOWDEN CABLES. THE SIGNALING DEVICE INCLUDES FOR EACH OF THE 14 CYLINDERS THAT ARE CONNECTED TO IT A SPECIAL STROKE INDICATOR. USING THE DEVICE ACCORDING TO THE INVENTION, THE OUTPUT STROKE OF THE INDIVIDUAL CYLINDERS CAN BE RELIABLY MONITORED.

Description

Monitoring device for cylinder stroke

  hydraulic control of an underground slaughtering installation

  raine, in particular from a planed felling installation.

  The present invention relates to a device for monitoring

  ce of the stroke of the hydraulic control cylinders of a device for adjusting the cutting horizon of a machine

  underground felling, especially a planer.

  To adjust the cutting horizon of an underground felling machine, and in particular of a coal planer, control devices are known which are presented in various embodiments, the device guiding device

  or the size conveyor that supports the device

  tif guiding the planer which can be moved by means of hydraulic cylinders so that the slaughtering machine is controlled by "plunging" or "rising" In a device of this type which has been particularly proven in the

  practical, the actuating cylinders are mounted between the device

  tif for guiding the plane or between an element of the conveyor supporting the device for guiding the plane and fixed on the side of the embankment and the head of the guide linkage passing over the hydraulic walking support so that during their movements, the guiding device of the plane is tilted in the plane perpendicular to the stratification, a direct relationship then existing between the stroke of the jacks and the angle of tilting During the tilting movement, the device for guiding the plane rocks with the conveyor

  around the joint connecting the heads of the trin-

  Gleries The guide linkage is used on the one hand to guide the walking support and on the other hand to Dras projecting widely backwards to support the device

  of the plane on the side of the embankment in relation to the rocking forces

  In addition, this linkage can be used as a pushing linkage for the shifting cylinders which are associated with the individual hydraulic walking elements. The hydraulic control cylinders are connected to the heads of the linkages by means of

  Ball joints (document DE-OS 25 34 325).

  According to the German patent application P 31 17 401 9 which was presented subsequently, it has been proposed to mount the control jacks in an inverted position between the guide linkage and the device for guiding the slaughter machine or of the conveyor, their ball joint fixed to the cylinder then being mounted in an articular bowl associated with the conveyor on the side of the bottom of the gallery This makes it possible to arrange the jacks in a relatively strongly inclined position, this loqui provides the possibility of mounting all the jacks of

  order in a very small space.

  The invention is particularly concerned with provisions

  control devices of the type mentioned or of similar type, in which the jacks are fixed to the linkage of

  guide mounted on the walking support In the arrangements

  Known control devices in this and other embodiments, it is found in practice that there are difficulties in controlling the outlet stroke of the individual jacks which, as a general rule, only cooperate with a gutter on two of the size conveyor This is in particular the case when several neighboring control jacks, for example three in number, are brought together in a group to which is associated only a single control valve device mounted on the side conveyor 251 gallery bottom It is not possible to see clearly from the valve device service station; order the

  respective position of the stroke of the cylinders which are connected

  Dice individually In practice, the consequence is most often that the slaughter installation is controlled either

  totally by "diving" or totally by "rising".

  The object of the invention is therefore to propose a monitoring device which functions well and by means of which the respective output stroke of the individual cylinders can be monitored in a small way and so that one can

  obtain a differentiated output stroke of said cylinders.

  According to the invention, this problem is solved by the fact that a common signaling device is associated with a group of control jacks, signaling device to which are

251937-2

  connected the individual cylinders by means of

  transmission The signaling device comprises advantageously-

  a special race signaling device for

  each of the control cylinders connected to it.

  According to the invention, with several control jacks

  sins, for example three in number, is associated with a device

  common signaling signaling device which signals the output of the individual cylinders, preferably in analog form, and which thus makes it possible to monitor and control with certainty the

  stroke of the individual cylinders which are thus connected.

  The signaling device may have small dimensions and be advantageously connected to the control valve device

  common to the group of control cylinders to form a set

ble integrated.

  For the transmission of signaling signals, transmission elements of various types can be provided such as hydraulic, electric or even mechanical, which are advantageously arranged and protected inside hydraulic lines made of flexible pipes leading to the individual control cylinders. We can then ensure that the connection sleeves of the control cylinders serving as fittings for the pipes are provided with passages

  for transmission elements.

  Advantageously, we use as trans-

  mission of simple means of traction and in particular of

  Bowden cables In this case, provision can be made before-

  ensures that the installation is constituted in such a way that the pulling means or the internal wires of the Bowden cables are connected on the one hand to a part which moves at the same time as the associated control jack when it performs its travel and on the other hand to a needle or an indicator subjected to the stress of a spring and movable along a graduated scale It is advantageous to connect the traction means or the internal wires of the Bowden cables to the

  piston or to the piston rod of the control cylinders.

  To go into more detail, the invention provides a guide tube mounted outside the cylinder of the jack for the passage of a lifting member connected to the piston rod. This lifting member can be constituted in the form of a tube and the traction means or the internal wire of the cable.

  Bowden can then pass through the guide tube and through the

  gane lifting of tubular form. Regarding the connection sleeves of the cylinders which also serve as fittings for the pipes, they

  include passages for the transmission elements.

  As for the signaling device which operates analogically, the invention provides that it includes passages in which indicators pass, along

  graduated scales visible at the back of a window.

  The flexible pipe lines through which the transmission elements pass are connected to the control valve device by means of fittings such as

"T" fittings f.

  When the Bowden traction devices or cables are connected directly to the piston of the cylinders, they are made

  go through coupling sleeves which are mounted laterally

on the cylinders.

  Furthermore, it is advantageous to mount on the traction means or the Bowden cables, adjustment devices comprising a coupling member in the left and right threads from which are respectively threaded rods connected to a section of the traction means. or Bowden cable, this coupling member being disposed inside a rotating member in the form of a socket and of which it is made integral in rotation This rotary member comprises an internal bore which is not round and which is of preferably oval or elliptical, in which the coupling member is arranged, the shape of which is also other than round and which is thus made integral in rotation As for the threaded rods, they are mounted in slides which are fixed to the traction members or to the eccentric Bowden cables, which are arranged in bores

  offset of connection fittings.

  According to another embodiment, the elements of

  transmission can be hydraulic.

  The invention will now be explained in more detail and in a nonlimiting manner with the aid of the embodiment shown in the accompanying drawings in which: FIG. 1 is a side view of a single control cylinder hydraulic which is mounted on the bottom side of the gallery of a ripable size conveyor, FIG. 2 represents the monitoring device according to the invention, at the same time as two hydraulic jacks belonging to a group of control jacks,

  Figure 3 is a vertical section of the signaling apparatus

  reader shown in FIG. 2, FIG. 4 is a section along line IV-IV of FIG. 5 of the signaling device, FIG. 5 is a cross section along line V-V of FIG. 3,

  Figure 6 is a partial section of a form of embodiment

  preferred position of the monitoring device and the transmission elements, FIG. 7 is a section along line V II-VII of FIG. 6, FIG. 8 is a section along line VIII-VLII of FIG. 6, FIG. 9 is a section along line IX-IX of the

figure 6.

  FIG. 1 represents a device for controlling the level of an underground slaughtering machine, in particular a coal planer, the constitution of which is known by document DE-OS 25 34 325 and by the German patent application P 31 17 410 9 The conveyor 10 which is arranged in front of the cutting face or the cutting edge of the cbarbon, and which is constituted in the form of a scraper chain conveyor, carries the guide device on the side of the cutting face (not shown) of the planer, which performs its work on the cutting face by peeling or planing On the side of the conveyor which faces towards the bottom of the gallery are mounted in a known manner the elements (not shown) of a walking support hydraulic, which can be constituted for example by support shields or the like Each support element is connected to the ripable conveyor 10 by means of a shifting device These shifting devices are constituted respectively by a linkage of

  guide 11 generally formed by two round and elastic rods

  which are connected to a linkage head 12 at their front end The linkage head 12 is connected to the

  conveyor 10 by means of a connection articulation

  13 whose axis is parallel to the longitudinal direction

  nale of the conveyor 10 The guide linkage 11 is mounted on its associated walking element in the direction of the shifting R and at the same time it can pivot in a limited manner in a plane perpendicular to the stratification, in the guide device of the linkage of the support element Each of two support elements is associated with a hydraulic control cylinder 14 mounted in an articulated manner between the guide linkage 11 and the size conveyor 10 which supports the planer guide device The cylinder 15 of the

  cylinder 14 carries a ball joint 16 mounted in an articulated cup

  laire 17 fixed to an element 18 located on the side of the bottom of the gallery 0 with respect to the conveyor 10 The rod 19 of the piston of the jack 14 is also mounted by means of a swivel 20 in

  an articular bowl of the head 12 of the linkage.

  Control devices of the type mentioned, or in similar forms, are known, which

  makes it unnecessary to give further explanations

  In general, at least three neighboring control cylinders 14 are served by a common control valve device (not shown), which can also be mounted on the conveyor 10 or on the mounting element 18, on the bottom side of the gallery By applying pressure to the jacks 14 in the direction of their deployment or their retraction, the size 10 conveyor and the device for guiding the slaughter machine can be tilted in the perpendicular plane

  to the stratification, and one can thus order the machine of felling-

  tage by "climbing" or "diving".

  FIG. 2 represents two hydraulic jacks forming part of a group of control jacks constituted for example by three jacks With this group of jacks is associated a common signaling device 21, which can be connected to the device with control valves mentioned of the group of cylinders in an integrated assembly, and which for this purpose comprises a cheek or connecting flange 22 intended for its removable fixing

  On the control valve device The individual cylinders

  els 14 of the group of jacks are respectively connected via a transmission element 23 to a signaling device 21 which comprises a particular stroke display device for each of the control jacks 14 which are connected to it The transmission elements 23 are mounted and protected inside of hydraulic pipes made of flexible pipes 24 whose bypass pipes are connected to the connection sleeves 25 of the cylinders 15

  cylinders 14 by means of couplings for traditional pipes

  These pipes are connected analogously to the signaling device 21 by a connection sleeve 26.

(Figures 4 and 5).

  The signaling device 21 comprises for each control cylinder which is connected to it an indicator 27, guided inside the device by a cylindrical guide means 28 and moving in front of a graduated scale 29 being

  visible from the outside at the back of a window 30 made of

  re plastic or glass Indicators 27 are respective-

  ment subjected to the action of a helical spring 31 (FIG. 3) mounted in the corresponding guide device 28 and which tends to push the indicator 27 which is associated with it towards the zero position which corresponds to the complete retraction of the

corresponding cylinder 14.

  In the embodiment shown, the transmission means 23 consist of Bowden cables,

  the internal wires 32 are connected by one of their ends

  mites to the associated indicator 27 and by their other end to the rod 19 of the piston of the jack 14 Outside the cylinder of the jacks 14 are fixed small guide tubes 33 in which lift lifting members 34 connected to the rods 19 of the pistons, and which are also constituted by tubes The tubes 34 are fixed at their external end to crosspieces 35 connected to the rods 19 of the pistons of the

  cylinders 14 The internal wires 32 which are arranged in the enclosure

  Bowden cable loop 23 exit laterally from the connection sleeves 25 of the cylinders to pass laterally into the guide tubes 33, and then into the tubes 34, to be fixed at 36 to the crosspieces 35 The arrangement is provided so that when the control cylinders 14 carry out an output stroke, the indicators 27 which are mounted in the common signaling device 21 are moved along the graduated scale 29 and against the restoring force l Odes springs 31, via the internal wires 32 of the Bowden cables 23, the indicators then displaying the respective output position of the jacks 14 on the graduated scale 29 in the form of an analog display Thus, it is possible to have a differentiated output and re-entry to the

  individual cylinders 14 of the group of cylinders by means of the provision

  sitive to common control valves and monitor the stroke

cylinder outlet 14.

  There is also the possibility of connecting the Bowden cables 23, or their internal wires 32, used to constitute the transmission elements to the piston of the cylinders 14 In this case, the internal wires 32 can be introduced into the cylindrical enclosure of the cylinders 14 by a bore in the guide sleeve connected to the cylinders 15

  on the side of the piston rod, and be attached to the piston.

  According to this embodiment, the elements can be eliminated

33, 34 and 35.

  Another particularly advantageous embodiment

  se of the device according to the invention is shown in FIGS. 6 to 9 A signaling device 21 also includes in this case a certain number of connections 26, for example three, intended for hydraulic pipes in flexible pipes

  which go to the individual control cylinders 14,

  picks in which pass the mechanical transmission elements constituted by traction means or Bowden cables, and which are used simultaneously for sending and evacuating the hydraulic pressure fluid to or from

  the hydraulic control cylinders 14 In FIG. 6 is-

  Lement shown a single control cylinder 14 with its connection which leads to the signaling device 21 The traction element used as a transmission element or the Bowden cable is constituted in this case by several sections 32 A, 32 B, 32 C and 32 D connected to each other so as to resist traction Section 32 A of the Bowden cable is fixed by one end at 40 to the piston 41 of the control cylinder 14 and exits by the connection sleeve 25 mounted

  laterally on the cylinder 15 of the cylinder At its other end

  miter, the section of Bowden cable 32 A is connected so as to resist traction to the section of Bowden cable 32 B by

  via a coupling 42 with a cylinder joint

  drique The Bowden 32 B cable section has at its

  opposite mite a slide 43 of round shape which is mounted eccentrically on this section of Bowden cable 32 B, as shown in particular in FIG. 7 Section 32 B of the Bowden cable is arranged in a protected manner inside a hydraulic hose high pressure 24 A which is removably connected to the connection sleeve 25 of the jack via a connection sleeve 44 The connection of the cylindrical articulation 42 is disposed inside

  24 A hose or its coupling sleeve 44.

  The high pressure hydraulic hose 24 A is connected by means of an adjustment device 45 to a connection frame, in this case constituted by a T-connector.

  46 by which the connection with the device is carried out on the one hand

  reil signaling device 21 and on the other hand the connection with the valve group control valve device The high pressure hydraulic hose 24 B is connected to the control valve device and is connected to the connection sleeve 46 by means of a removable accuplement 47 Another

  24 C pressure water hose establishes, through the ac-

  coupling 49, the connection between the connection sleeve 46

and the signaling device 21.

  The adjustment device 45 comprises a coupling member

  ment 50 which comprises on one side an axial bore 51 provided with a left hand thread and on its other side an axial bore 52 provided with a right hand thread In the bore 51 is screwed a threaded rod 53 which is - even fixed to the slide 43 In the other threaded bore 52 is also screwed a threaded rod 54 which is mounted on a slide 55 disposed in the axial through bore of the T connection sleeve 46 and which is connected to the section of Bowden cable 32 C The latter includes at its other end a

  piston 56 sliding in a slide 57 of the signaling device

  launcher 21 by making the latter watertight On the piston 56 is fixed the Bowden cable section 32 D which is passed over a roller or a rod 58 and is connected at its end to

  an indicator 27 subjected to the stress of the spring 31.

  The coupling member 50 of the adjustment device 45 is arranged in the axial bore of a rotating member in the form of a socket 59, mounted between the connection sleeve 46 and the high pressure pipe 24 B and integral in rotation with these parts by means of a coupling of pipes or tubes 48 As can be seen in particular in FIG. 8, the coupling member 50 is not round, but on the other hand substantially elliptical or oval The bore internal 60 has in the region of the coupling member 50 a corresponding cross section which is not round and which may be elliptical or oval, so that the rotating member 59 is made integral in rotation with the member

  coupling 50 The slide 43 is arranged in a bore

  sage sage 61 (figure 7), which is arranged eccentrically From

  correspondingly, the axial bore of the coupling sleeve

  demented in T in which is housed the other slide 55 is

  mounted eccentrically to the axis of the pipe.

  When the control valve device (not shown) is actuated, the hydraulic fluid passes through the high pressure pipe 24 B, the T-shaped connection sleeve 46, the internal bore of the rotating member 59 of the adjustment device 45 and through the 24 A high pressure hose in the enclosure

  cylindrical of the control cylinder 14 The tightness of the

  reil signaling 21 with respect to the pipe 24 C in which the hydraulic fluid passes is produced by means of the piston 56 Thanks to the adjusting device 45, the length of the Bowden cable system can be adjusted and it can be lengthened or shortened by making turn the rotating member 59 in a

251937-3

  one way or the other We can thus adjust the position of the indicator 27 Thanks to the eccentric position of the slides 43, 55 which slide in a bore 61 also eccentric of the

  24 A hydraulic hose connection or connection sleeve

  in T 46, the rotation of the Bowden cable section is avoided. When the adjustment is finished, the

  adjustment device 45 by means of an element (not shown

  felt) which prevents the rotating member 59 from rotating.

  When a hydraulic transmission is used, it is possible to use to produce the transmission elements 23 small pipes made of flexible pipes which are fixed at one of their ends for example to the guide tubes 33 constituted in the form of small hydraulic jacks, in which slide lifting members 34 connected to the rods 19 of the pistons and operating in the manner of pistons

  hydraulic At their other end, the transmission elements

  hydraulic missions are connected to small cylinders provided inside the signaling device 21 and in

  which slide pistons which are connected to the indicators

  teurs 27 The pressurized fluid which is discharged during the return and exit stroke of the jacks 14 between the aforementioned transmission jacks, by means of the hydraulic transmission lines, determines in this case the movement of the indicators 27 or of the pistons adjustment

  subject to the stress of springs and connected to them.

251937-3

Claims (16)

  1 Device for monitoring the stroke of the hydraulic control jacks of a device for adjusting the cutting horizon of an underground felling machine, and in particular of a planer, characterized in that a common signaling device ( 21) is associated with a group of control cylinders (14), an apparatus to which the individual cylinders are connected   (14) by means of transmission elements (23).   2 Device according to claim 1, characterized in that the signaling device (21) comprises a particular travel indicator for each of the control jacks (14) connected to it.   3 Device according to claim 2, characterized in that   that the transmission elements (23) are arranged inside   of hydraulic pipes in flexible pipes (24) which   are connected to the individual control cylinders (14).   4 Device according to one of claims 1 to 3,   characterized in that the signaling device (21) is connected to the common control valve device of the cylinder group to form an integrated whole.   5 Device according to one of claims 1 to 4,   characterized in that the transmission elements consist of traction means and preferably by Bowden cables.   6 Device according to claim 5, characterized in that the traction means or the internal wires (32) of the Bowden cables are connected on the one hand to a part which moves at the same time as the associated control cylinder (14) when it performs its stroke and on the other hand to an indicator (27) subjected to the stress of a spring and moving   along a graduated scale (29).   7 Device according to claim 6, characterized in that the traction means or the internal wires of the Bowden cables are connected to the piston or to the rod (19) of the piston control cylinders (14).   8 Device according to one of claims 1 to 7,   characterized in that a guide tube (33) for a lifting member (34) connected to the rod (19) of the piston is mounted on the external side of the cylinder (15) of the actuator control (14).   9 Device according to claim 8, characterized in that the lifting member (34) is in the form of a tube and in that the traction means or the internal wire (32) of the Bowden cable (23) passes through the guide tube (33) and by   the lifting member of tubular shape (34).   Device according to one of claims 3 to 9,   characterized in that the connecting sleeves (25) of the cylinders (14) which serve as fittings for the pipes are   provided with passages for the transmission elements (23).   11 Device according to claim 10, characterized in that the signaling device (21) provided with analog indicators comprises slides (28) intended for the indicators (27) movable behind a window (30), the along a graduated scale (29).   12 Device according to one of claims 3 to 11,   characterized in that the flexible pipe lines (24) through which the transmission elements (23) pass are connected to the control valve device by means of connection fittings (46) such as T-connection sleeves .   13 Device according to one of claims 5 to 7,   characterized in that the traction means or the Bowden cables which are connected to the piston (41) of the jacks (14)   pass through connection sleeves (25) mounted laterally also on the cylinders.   14 Device according to one of claims 5 to 13,   characterized in that adjustment devices (45) are 3 U interposed in the traction elements or the Bowden cables (32 A, 32 B, 32 C, 32 D).   Device according to Claim 14, characterized in that the adjustment devices (45) comprise a coupling member (50) in the left and right threads from which threaded rods (53, 54) are respectively connected to a section traction device or cable   Bowden, the coupling member (50) being arranged inside   of a rotating member in the form of a socket (59) and being 251937-3   secured to the latter in rotation.   16 Device according to claim 15, character-   laughed in that the rotating member (59) has a bore   internal (16) which is not round and which is preferably felt   substantially oval or elliptical, in which is mounted in rotation the coupling member (50) which also a shape that is not round.   17 Device according to one of claims 15 or   16, characterized in that the threaded rods (53,54) are   mounted in slides (43,55) which are fixed eccentrically   only to traction means or Bowden cables and which are arranged in eccentric boreholes of reinforcements connection.   18 Device according to any one of the claims   previous cations, characterized by the use of elements hydraulic transmission (23).