EP0363575B1 - Vérin pneumatique avec dispositif de verrouillage dans les positions extrêmes, en particulier pour la commande de clapet de fumée - Google Patents

Vérin pneumatique avec dispositif de verrouillage dans les positions extrêmes, en particulier pour la commande de clapet de fumée Download PDF

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Publication number
EP0363575B1
EP0363575B1 EP89112178A EP89112178A EP0363575B1 EP 0363575 B1 EP0363575 B1 EP 0363575B1 EP 89112178 A EP89112178 A EP 89112178A EP 89112178 A EP89112178 A EP 89112178A EP 0363575 B1 EP0363575 B1 EP 0363575B1
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EP
European Patent Office
Prior art keywords
locking
cylinder
piston
rod
piston rod
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP89112178A
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German (de)
English (en)
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EP0363575A1 (fr
Inventor
Otto Grasl
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OTTO GRASL Firma
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OTTO GRASL Firma
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Filing date
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Application filed by OTTO GRASL Firma filed Critical OTTO GRASL Firma
Priority to YU152389A priority Critical patent/YU48225B/sh
Priority to SI8911523A priority patent/SI8911523B/sl
Priority to DK385289A priority patent/DK172502B1/da
Priority to HU894103A priority patent/HU214169B/hu
Publication of EP0363575A1 publication Critical patent/EP0363575A1/fr
Priority to HR930767A priority patent/HRP930767B1/xx
Application granted granted Critical
Publication of EP0363575B1 publication Critical patent/EP0363575B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/26—Locking mechanisms
    • F15B15/261—Locking mechanisms using positive interengagement, e.g. balls and grooves, for locking in the end positions

Definitions

  • the invention relates to a compressed air cylinder of the type as a double-stroke cylinder for actuating smoke flaps in smoke and heat exhaust systems according to the preamble of claim 1.
  • Compressed air cylinders of this type are used in smoke and heat extraction systems (abbreviated: RWA systems) to open smoke and heat extraction flaps automatically or remotely in the event of a fire, so that smoke can escape, which would otherwise make rescue difficult or impossible, and thus a central one Access for rescue is created.
  • RWA systems smoke and heat extraction systems
  • the build-up of heat build-up should be prevented by opening the heat and smoke flaps.
  • the compressed air cylinders used must meet high safety requirements.
  • the known double-stroke cylinders can have end position locks, which in particular are intended to ensure extensive burglar resistance.
  • the end position interlocks have to apply locking forces that are many times higher than the normal force of the compressed air cylinder.
  • the end position locking is carried out according to the state of the art by mechanically self-retaining elements.
  • an end position lock is provided in which a loaded pin or bolt or ball snaps into a groove. This constantly loaded locking element creates considerable abrasion, which limits the permissible number of switching operations.
  • the relatively long design of such a lock which thus negatively affects the overall height of the air cylinder, disrupts a higher one Space required and possibly limited the pivotability of the air cylinder.
  • a known double stroke cylinder of the type mentioned can lock a piston rod in a middle ventilation position between a ventilation and smoke extraction position and an opposite end position by locking (DE-A-2 906 819).
  • the piston rod which is led out of a cylinder housing at one end, has a locking groove at its inner end and at a rod part, which is opposite with respect to the working piston. This interacts with a releasable locking device, which is arranged at the end of the cylinder housing and can be pressurized with compressed gas to mechanically hold the piston rod in its retracted or most extended position.
  • the working piston is arranged on an inner end of the piston rod near the one locking groove, and in the piston rod part outside the other locking groove there is a third locking groove which is brought into locking engagement with the locking device can, which is arranged at the outlet end of the cylinder housing from which the piston rod exits.
  • the latter locking device has, in particular, a double piston with two pressure gas application surfaces lying one behind the other, the inner of which is connected to a low-pressure gas connection and the outer to a high-pressure gas connection.
  • the known double-stroke cylinder has a large overall length that limits the installation options. Since the third locking groove has to move through seals when the piston rod is displaced, sealing problems can occur.
  • the locking device, which interacts with the third locking groove is subject to additional wear.
  • the present invention is therefore based on the object of developing a double-stroke cylinder of the type mentioned at the outset so that it is low-wear and compact, in particular has a small overall length. Sealing problems should be avoided.
  • a compressed air cylinder designed as a double stroke cylinder according to the invention according to claim 1, with which a short design of the cylinder is realized with the lock and which is characterized by high wear resistance, has the features that coaxial to the piston rod and to this up to a stop on the
  • An additional locking rod is displaceably provided, which delimits a partial stroke of the piston rod and, in this partial lifting position, projects into an outer locking cylinder arranged on one of the locking pistons, in which an additional locking piston is slidably mounted and engages balls with a sleeve-like section in the partial lifting position engage annular groove in the additional locking rod and are otherwise radially movable, and which releases the radially outwardly movable balls when it is axially moved away from them, and that the additional locking piston via a pressure-controlled reversing valve when a predetermined pressure m it communicates with the closest adjacent cylinder space.
  • the releasable fixation of the piston rod in a partial stroke position can be combined with a likewise low-wear design of the end position lock according to claim 2.
  • External stop covers are used for the locking pistons, each of which has a hole. No stop cover is therefore designed to be closed. Through one of the stop covers the piston rod, which is surrounded in this area by one of the two locking pistons, is sufficient.
  • the additional locking rod which can be locked on the outside by an additional locking piston in the partial stroke position, is guided through the bore of the other stop cover and the other locking piston provided for locking the end position.
  • the additional locking piston with the elements interacting with it, in particular the balls, which can slide into a groove in the additional locking rod is constructed according to the same principle as the locking pistons for the end position locking.
  • the pressure-controlled reversing valve automatically pushes the additional locking piston into a position that overrides the partial stroke limitation when the controlling pressure of the medium, in particular the compressed air, exceeds a predetermined value for extending the piston rod.
  • This compressed air is supplied to the additional locking piston or the adjacent locking pressure chamber from the adjacent locking pressure chamber of the rear or lower locking piston in a short way.
  • the locking cylinder in which the additional locking piston is slidably arranged, is preferably located directly on the rear or lower locking piston.
  • the parts on the rear and front region of the double-stroke cylinder can be constructed identically and thus can be replaced. This applies in particular to the interchangeability of the cylinder head with the cylinder base.
  • a guide rod is slidably mounted in a bore in the piston rod, one end of which has a stop which limits the mutual displacement of the piston rod and the guide rod, and the other end of which is connected to the additional locking rod.
  • the piston rod can also be designed as a tube. Due to the centric displaceability a very short overall length of the cylinder can be achieved between the guide rod and the piston rod. The overall dimensions of the compressed air cylinder with end position locking are practically only increased by the dimensions of the partial stroke limitation and locking.
  • the double stroke cylinder can be designed both as a double tube cylinder and as a compressed air cylinder with only one tube.
  • the locking piston Due to the locking piston, which can be moved concentrically with the piston rod and the additional locking rod, a largely load-free locking of the radially movable balls can be achieved, which partially engage in a rounded groove of the piston rod or the locking rod.
  • the balls are reliably held in the grooves by the sleeve-like section of the locking piston, which engages around the balls. If, on the other hand, the locking piston is pushed back by the balls, which occurs automatically when the pressure medium is applied to the compressed air cylinder, the balls are exposed on one of the two grooves, so that they move radially outwards from the grooves when the piston rod or the locking rod moves can slide.
  • the balls can easily be returned to the groove by the self-displacing locking piston.
  • the end face of the locking piston is expediently provided with a chamfer.
  • the locking piston therefore moves automatically when the associated pressure chamber of the opposing cylinder is pressurized with the pressure medium, since a locking pressure chamber on one side of the locking piston is in a pressure-conducting connection to one of the two cylinder chambers. If, on the other hand, the pressure in this cylinder chamber is reduced, the locking piston moves back automatically into its locked position, for which purpose the locking piston is particularly loaded by a compression spring.
  • this compression spring does not work directly onto the balls, which engage in the groove of the piston rod or locking rod, but merely displaces the locking piston, which slides on the piston rod or locking rod with little wear and with its sleeve-like section over the balls.
  • Another significant advantage is that the arrangement, in particular of the locking piston in the locking pressure chamber concentric with the piston rod or locking rod, the sleeve-like section of the locking piston enclosing the balls, enables a compact, in particular short dimensioning of the compressed air cylinder without restricting the functionality is.
  • the radially movable balls, which are used for locking, are guided in particular in a ball sleeve according to claim 12.
  • radial guidance through the ball sleeve can be dispensed with if the balls lie against one another in the circumferential direction in the manner of a ring.
  • a larger number of relatively small balls can be used, which are not separated from one another by sections of the ball sleeve. Due to the large number of small balls, e.g. 10 balls and more, a particularly high locking force can be achieved in an uncomplicated manner when the balls rest in the groove.
  • the piston rod in which the piston rod merges into the locking rod on one side of the piston, the piston rod can be produced from a heavy-duty material, in particular V3A, while a lighter material, in particular an aluminum alloy, can be selected for the locking rod .
  • each of the two locking pistons protruding from the compressed air cylinder according to claim 7 enables - with a corresponding profile - an auxiliary manual unlocking.
  • an outer and an inner groove ring are expediently arranged in the locking piston, which is displaceable on the piston rod, which serve to seal the locking pressure chamber to the outside.
  • the compressed air cylinder is advantageously closed at each end by a stop cover, which forms at least one spring receiving space and a stop for the locking piston, each concentric with the piston rod or locking rod. This promotes the compact design of the air cylinder.
  • the section of the locking piston projecting from one of the stop covers has a bore in a manner known per se, through which the piston rod is displaceably guided.
  • the section of the additional locking piston projecting from the stop cover of the locking cylinder is closed.
  • a support part is particularly advantageously displaceably mounted, which is aligned with the locking bar and pressed against its end face by a spring.
  • the additional locking piston, the supporting part and the stop cover with the spring receiving space are arranged at least partially concentrically overlapping one another at one end of the locking cylinder.
  • the compressed air cylinder can have the two pressure medium connections for the two cylinder spaces - and associated bolt pressure spaces - in a plane aligned with one another at right angles to a main longitudinal direction of the compressed air cylinder on the cylinder head or the cylinder base.
  • the cylinder head and the cylinder base are interchangeable, which includes, among other things, the same bores for the piston rod and the locking rod, depending on the configuration of the cylinder head and the cylinder base, a suspension of the compressed air cylinder can be used the pressure medium connections is mounted, attack in the upper part or in the lower part of the cylinder, which is designed as a double tube cylinder.
  • the reversing valve includes a spring-loaded cup sleeve, which can establish a connection from a preset pressure between a pressure medium supply and a valve chamber, into which radial bores open.
  • the spring load in particular setting a preload, the limit value of the air pressure can be determined, from which the pressure medium supply to the valve chamber is switched on and the double-stroke cylinder moves into the fully extended end position - alarm position.
  • valve bore of the reversing valve is preferably conductively connected to the closest adjacent cylinder space pressure medium, and the radial bores lead to a locking pressure space in the outer locking cylinder.
  • the pressure-controlled reversing valve can be used simply and in a rational manner as a connecting valve with which elements actuated by pressure medium, in particular at least one lifting cylinder, are only actuated in a compressed air cylinder arrangement from a predetermined minimum pressure.
  • the additional valve is inserted into the pressure medium line to the lifting cylinder.
  • the connection valve comprises a pressure-controlled reversing valve and, in the present variant, expediently a connection plate attached to the reversing valve, to which the pressure medium line, interrupted by the connection valve, can be connected.
  • the connecting bores are directly connected to the radial bores of the reversing valve via connecting bores. The same type of valve can therefore be used for two different purposes, depending on how it is connected to the compressed air cylinder or a compressed air cylinder arrangement.
  • only one cylinder head 41 is equipped with aligned blind holes 61, 62 lying in one plane, each of which is used optionally for supplying compressed air and which are both used together to suspend the compressed air cylinder.
  • the cylinder head 41 and a cylinder base 42 are mutually interchangeable, so that either the suspension on the upper portion of the air cylinder or on its lower portion, depending on where the cylinder head 41 is attached.
  • the compressed air supply from the blind hole 61 to a first cylinder space 63 via a channel 64 and not shown game takes place on a piston rod 51.
  • the compressed air supply to the bolt pressure chamber 45 also takes place through the play of the piston rod 51.
  • the compressed air-conducting connection between the blind hole 62 and a bolt pressure chamber 92 at the right or lower end of the compressed air cylinder takes place via channels 47, 48 and a space between a cylinder tube 49 and a protective tube 50, which connect the cylinder head and the cylinder base with each other.
  • a second cylinder chamber 65 is in turn fed with compressed air via a play of a locking bar 70.
  • a piston 53 is, depending on which of the blind holes 61, 62 is pressurized with compressed air, moved forwards or upwards or backwards or downwards while simultaneously releasing the end lock on a locking piston 75 or on a front locking piston 43.
  • the piston rod can be moved by a relatively large stroke and locked in its end positions, but also by a defined smaller stroke, in that the piston rod is held by the pressure present.
  • the cylinder tube 49 and the protective tube 50 form in connection with the cylinder head 41 and the cylinder base 42 such long cylinder spaces 63, 65 that the piston 53 can be adjusted by the maximum stroke, in particular for actuating smoke flaps.
  • the piston 53 In the upper part of FIG. 1 above a main longitudinal axis 67, the piston 53 is shown in a left and upper position, in which the piston rod 51 is fully extended. In contrast, in the lower part of FIG. 1 below the main longitudinal axis 67, the piston 53 is in its right or lower end position, that of the retracted position of the piston rod 51 corresponds. 2, the piston 53 assumes an intermediate position corresponding to a partial stroke of the piston rod 51.
  • a guide rod 71 is mounted coaxially displaceably within a bore 68, see FIG. 2, and within a bore 69 within a locking rod 70 screwed to the piston rod in the region of the piston.
  • the latter is provided with a likewise slidable stop 72 - see FIG. 2 - which can come to rest on a tapered end face 73 of the locking rod 70 and forms a stop there.
  • an additional locking bar 74 of larger diameter is screwed onto the guide bar 71 and can be locked to limit the partial stroke.
  • the locking piston 75 is provided with an outwardly open extension 76, to which an outer locking cylinder 77 is attached.
  • An additional locking piston 78 is slidably mounted in the locking cylinder 77, which is supported on a stop cover 80 against a spring 79, which is only indicated.
  • the parts 77 - 80 are used in conjunction with the elements to be discussed to limit the stroke, ie to lock the piston rod during a partial stroke.
  • the additional locking piston 78 has in particular a sleeve-like section 81, under which balls 82 can be locked by engaging in an annular groove 83 in the additional locking rod 74. There is then a set of small balls lying in a ring around the circumference of the groove in the groove.
  • sets of smaller balls 84 and 85 without a ball sleeve are supported in the areas of the sleeve-like sections 86 and 87 so that they can be inserted into annular grooves 88, 89 in the locking bar 70 and the piston rod 89, respectively. So that the balls 82 and 84 cannot fall into the cavities released in an uncontrolled manner when the additional locking bar 74 or locking bar 70 is withdrawn, spring-loaded displaceable support parts 90, 91 are provided which support the balls in these cases.
  • connection between the blind hole 62 and a bolt pressure chamber 92 and the second cylinder chamber 65 is partially. described above.
  • the channel 94 leads to a reversing valve 95, which has a cup sleeve 96, which is on one side under the adjustable pressure of a spring sleeve 97 and itself can support on a valve seat 114.
  • a spring 98, a threaded pin 99 in a nut 100 are used to adjust the pressure. The threaded pin can be locked by a nut.
  • the setting of the prestress of the spring 98 determines the pressure from which the piston rod is pushed into the fully extended position in the blind hole 62 after the lock on the additional locking rod 74 is released.
  • the spring sleeve 97 releases a valve chamber 102 in which the pressure built up therein via the channel 94, a radial bore 103a and a valve bore 103 presses back the cup sleeve 96 against the spring force.
  • the compressed air can therefore flow through radial bores 104, 105 to reach the locking pressure chamber 93 and thus push the additional locking piston 78 back to the right or down, so that its sleeve-like section 81 releases the balls 82 which come out of the groove 83 can be pushed out when the piston 53 is pushed completely to the left or up to the fully extended position as a result of the pressure in the cylinder space 65.
  • This position is shown in the upper part of FIG. 1.
  • the balls 85 snap into the groove 89 of the piston rod in order to ensure a large locking force or holding force in the fully extended position.
  • the piston extends only by a partial stroke or a ventilation stroke.
  • a predetermined pressure level of e.g. Remains 5 bar the pressure in the valve bore 103 is not sufficient to lift the cup sleeve 96 and to establish the connection to the radial bores 104, 105 via the valve chamber 102.
  • This leakage protection prevents the balls 82 from being inadvertently released by moving the additional locking piston 78 if the reversing valve is dirty or worn.
  • the additional locking bar 74 thus remains in the locked right or lower position.
  • the piston 53 can therefore only move upwards until the stop 72 comes to bear against the end face 73 of the locking rod 70 in the piston rod 51 and holds the piston rod in this position.
  • the balls 85 are released from the groove 89 in the piston rod from the previous return of the piston, which is discussed in connection with the lower part of FIG. 1.
  • one of the two blind holes 61, 62 is pressurized with compressed air of a pressure, which is not critical in this case. Reference is made specifically to the lower part in FIG. 1.
  • the blind hole 61 is pressurized, which propagates along the piston rod into the bolt pressure chamber 45 and into the first cylinder chamber 63.
  • the piston rod 53 is shifted to the right or down as far as it will go against the cylinder base 42.
  • the balls 84 come into the annular groove 88 of the locking bar 70 and are held there by the sleeve-like section 86 which is pushed over them by spring force.
  • the guide rod 71 and the additional locking rod 74 are moved to the right or downward into the end position via the stop 72, which abuts the end of the bore 68 in the piston rod, which they assume for limiting the stroke or for setting a partial stroke.
  • the balls 82 fall into the groove 83 in the additional locking bar and are held in this position by the additional locking piston 78 pushed to the left or up under spring force.
  • the reset can take place both from the fully extended position in the upper part of FIG. 1, as described above, and from the partial stroke position in FIG. 2, the balls 85 need not be unlocked, since they have not fallen into the groove 89 of the piston rod here.
  • FIGS. 3 and 4 show the same stroke positions as in FIGS. 1 and 2, but for a compressed air cylinder that has only one cylinder tube 9.
  • the piston rod 106 is in turn provided with a bore 107 for mounting a stop 108 on a guide rod 109.
  • the guide rod is screwed at its opposite end into an additional locking rod 110, which extends through the locking piston 112 provided with an extension 111 into an outer locking cylinder 113.
  • the outer locking cylinder 113 with the parts mounted in it, including an attached reversing valve 95, is constructed in the same way as the outer locking cylinder 77 with the reversing valve 95, so that there is no need to repeat the description.
  • FIGS. 1 and 2 Different from the embodiment in FIGS. 1 and 2, in the embodiment according to FIGS.
  • the cylinder head 1 and the cylinder base 2 are provided between a blind hole 27 in the cylinder head 1 and a cylinder space 9a and a bolt pressure space 22.
  • connection channels between a blind hole 30 in a cylinder base and a second cylinder pressure chamber 9b on the one hand and a bolt pressure chamber 23.
  • the bolt pressure chamber 23 is in turn connected via a channel 94 to the bolt pressure chamber 93 of the additional bolt piston 78.
  • the partial stroke locking in all the embodiments according to FIGS. 1-4 can be easily released by pulling out the additional locking piston 78.
  • the rear locking piston 112 can also be easily pulled out together with the outer locking cylinder 113 to release the partial stroke position by inserting a tool into the blind hole 115.
  • the pressure medium-operated reversing valve 95 can also be used as a connecting valve, in particular of compressed air cylinders, which are designed as single-stroke cylinders, in a line of a pressure medium-operated arrangement for smoke flap actuation.
  • the reversing valve 95 is provided with a connecting plate 116, see FIGS. 5 and 6.
  • the entirety of the reversing valve 95 and the connecting plate 116 is regarded as a connecting valve.
  • the structure and principle of operation of the pressure-operated reversing valve are the same as described above.
  • the reference numerals of the individual elements of the reversing valve have therefore been retained in FIGS. 5 and 6.
  • connection plate 116 is approximately cuboid with at least one flat side 117 which bears tightly on a likewise flat side 118 of the reversing valve. These two elements are held together by Allen screws, not shown, which extend through bores 119, 120 in the connecting plate and are screwed into threaded holes in the reversing valve.
  • Mounting holes for mounting the sequence valve are designated 121, 122.
  • a first connection bore 123 into which a first connection bore 124 projects transversely, is used to connect a first line which is under the controlled pressure of a pressure medium. This passes into the radial bore 103a of the reversing valve attached.
  • a second connection bore 125 for connecting an outgoing, second line is connected via a tapered bore section 126 to a cross bore 127, from which - at right angles to the second connection bore and to the cross bore - a second connection bore and a third connection bore 128, 129 extend.
  • the second and the third connecting bores merge into the radial bores 104 and 105 of the reversing valve mounted.
  • the cross hole is closed by a threaded pin 130.
  • connection valve 95, 116 constructed in this way is acted upon, this creates a pressure medium-conducting connection between the first connection bore 124 and the second connection bore 125: If the pressure in the first pressure medium connection (connection bore) 123 does not reach a predetermined minimum value, the cup sleeve 96 is pressed onto the valve seat 114 in the rest position shown in FIG. 5 under the action of the spring sleeve 97 and the spring 98. As a result, a pressure medium-conducting connection between the first connection bore and the second connection bore is interrupted.
  • the pressure at the second connection bore 125 can be compensated for via the third connection bore 129, the radial bore 105 along the outside of the spring sleeve 97 to the outside.
  • the pressure at the first connection bore 123 is so high that the cup sleeve 96 lifts off the valve seat 114 against the force of the spring 98, there is a pressure-medium-conducting connection between the first connection bore via the first connection bore 124, the radial bore 103a , the valve bore 103, the valve chamber 102, the radial bores 104, 105, which, like the adjoining connection bores 128, 129, are parallel, via the transverse bore 127 to the second connection bore 125.
  • a compressed air cylinder with end position lock 113 and a double stroke cylinder 132 are provided for actuating one smoke and one heat exhaust flap 133 and 134, respectively.
  • a pressure-controlled reversing valve 135, as described above, is integrated with the double-stroke cylinder 132.
  • the compressed air cylinder arrangement also includes a manual control valve 136, the one output of which is connected via lines 137, 138, 139 to unspecified inputs or blind holes of the compressed air cylinder with end position lock 131 and the double-stroke cylinder 132 in order to close the smoke and heat exhaust flaps in the closed position drive.
  • a pressure medium line consisting of sections 143, 144, in which a connecting valve 145 is switched on, is branched off from a connection point 142.
  • the connection valve is again pressure controlled.
  • the pressure medium line consisting of the sections 143, 144, leads to a compressed air supply or a blind hole of the cylinder 131.
  • the double-stroke cylinder 132 drives the smoke - And heat flap 134 in a first open position, since the reversing valve 135 prevents another stroke. Since in this pressure range the pressure-controlled connection valve interrupts the pressure medium line, consisting of sections 143, 144, the smoke and heat exhaust flap 133 is not actuated. - Only in the event of an alarm, when the pressure on the manual control valve exceeds a predetermined pressure, the connection valve 145 transfers this pressure into the section 144 of the pressure medium line and from there into the compressed air cylinder with end position lock 131, which thus the smoke and heat vent valve 133 in the open alarm position pivots. In addition, the reversing valve 135 on the double-stroke cylinder 132 releases the further alarm stroke of the double-stroke cylinder, which opens the smoke and heat vent flap 134 accordingly.

Claims (20)

  1. Vérin pneumatique du type vérin à double effet pour l'actionnement de clapets d'extraction de fumée dans des installations d'évacuation de fumée et de chaleur, comportant des dispositifs de verrouillage des deux côtés de position d'extrémité, comportant un piston (53) pouvant être sollicité sur ses deux côtés et qui est déplaçable sous l'action d'un milieu de pression, dans un cylindre comportant deux espaces (63,65;9a,9b), et une tige de piston (51;106), dans lequel, des éléments de verrouillage réalisés sous la forme de billes (84,85) sont retenus, dans les emplacements de verrouillage, dans des rainures de la tige de piston (51;106), par l'intermédiaire de pistons de verrouillage (43,75) chargés par des ressorts, et la tige de piston peut être arrêtée, au moins alternativement par rapport à l'un des dispositifs de verrouillage de position d'extrémité, des deux côtés, dans une position intermédiaire entre les positions d'extrémité,
    caractérisé en ce
    qu'il est prévu une tige supplémentaire de verrouillage (74;110), qui est coaxiale à la tige de piston (51;106) et est déplaçable par rapport à cette dernière jusqu'à venir indirectement ou directement contre une butée prévue à la tige de piston (côté frontal 73) et qui limite une course partielle de la tige de piston (51;106) et, dans cette position de course partielle, pénètre dans un cylindre extérieur de verrouillage (77;113) disposé à l'un (75) des pistons de verrouillage et dans lequel est monté de façon à être déplaçable un piston supplémentaire de verrouillage (78), qui, dans une position de course partielle, entoure, par une section en forme de douille (81), des billes (82), qui s'engagent dans une gorge de forme annulaire (83) ménagée dans la tige supplémentaire de verrouillage et, sinon, déplaçables radialement, et qui libère les billes (82) déplaçables radialement vers l'extérieur, lorsqu'il est écarté axialement de ces billes, et que le piston supplémentaire de verrouillage (78) se trouve en liaison, par l'intermédiaire d'une vanne d'inversion de commande (95) commandée par une pression, à la chambre directement voisine (65) du cylindre, lors du dépassement d'une pression prédéterminée.
  2. Vérin pneumatique selon la revendication 1, caractérisé en ce que, des deux côtés et à l'extérieur des espaces de cylindre fermés (63,65;9a, 9b), et, au voisinage respectivement de l'un de ces espaces de cylindre, est déplaçable, concentriquement à la tige de piston (51;106), respectivement un piston de verrouillage (43,44;112), qui est relié à l'espace de cylindre voisin (63,65;9a,9b) du cylindre selon une liaison de transmission du milieu de pression, que chaque piston de verrouillage (43,75;112) comporte une section en forme de douille (86,87), qui, dans une position de verrouillage, entoure les billes (84,85), qui sont déplaçables radialement et peuvent rouler, et qui s'engagent partiellement dans une gorge annulaire (88,89) reliée à la tige de piston (51,106), et libère les billes radialement vers l'extérieur lorsqu'il est écarté axialement de ces dernières, que, dans la position de course partielle, la tige supplémentaire de verrouillage (74;110) fait saillie hors de l'un (75) des deux pistons de verrouillage, et en ce que le cylindre extérieur de verrouillage (77;113) est agencé extérieurement à ce piston de verrouillage (75).
  3. Vérin pneumatique suivant la revendication 1, caractérisé en ce que dans un perçage (68,107) ménagé dans la tige de piston (51;106), est logée, de manière à être déplaçable, une tige de guidage (71;109), dont une extrémité présente une butée (72;108), qui limite la mobilité réciproque de la tige de piston et de la tige de guidage et dont l'autre extrémité est reliée à la tige supplémentaire de verrouillage (74;110).
  4. Vérin pneumatique selon la revendication 2, caractérisé en ce que les billes (84,85) sont disposées côte-à-côte de manière à former une couronne dans la direction périphérique de la gorge (88,89), dans la position dans laquelle elles sont enfoncées dans cette gorge.
  5. Vérin pneumatique selon l'une des revendications 1 à 4, caractérisé en ce que le piston (53), qui peut être sollicité des deux côtés, est fixé entre la tige de piston (51) et une tige de verrouillage (70), qui est alignée avec la tige de piston, et qu'en dehors de la tige de piston (51), la tige de verrouillage (70) comporte respectivement une gorge annulaire (88,89) servant à loger en partie les billes (84,85), qui réalisent le verrouillage.
  6. Vérin à air comprimé suivant l'une des revendications 1 à 5, caractérisé en ce que chaque piston de verrouillage (43;75;112) est pressé, par au moins un ressort, sur les billes voisines (84,85).
  7. Vérin pneumatique selon l'une des revendications 1 à 6, caractérisé en ce que chaque piston de verrouillage (43,75;112) présente une section qui fait saillie hors du vérin pneumatique.
  8. Vérin pneumatique selon l'une des revendications précédentes, caractérisé en ce que respectivement une bague rainurée intérieure et une bague rainurée extérieure sont disposées au piston de verrouillage (43,75;112), qui est déplaçable sur la tige de piston (51;106).
  9. Vérin pneumatique selon l'une des revendications précédentes, caractérisé en ce que chacune des deux extrémités du vérin pneumatique ou une extrémité du cylindre de verrouillage (77) est fermée par un couvercle de butée (80a ou 80), qui forme au moins un espace d'accueil de ressort et une butée pour le piston de verrouillage, respectivement concentriquement à la tige de piston (51;106) ou à la tige de verrouillage (70).
  10. Vérin pneumatique selon la revendication 9, caractérisé en ce que la section, qui sort d'un couvercle de butée (80a), du piston de verrouillage (43) présente un perçage, à travers lequel la tige de piston (51;106) est déplaçable d'une manière guidée.
  11. Vérin pneumatique selon la revendication 9 ou 10, caractérisé en ce que la section, qui fait saillie hors du couvercle de butée (80) du cylindre de verrouillage, du piston supplémentaire de verrouillage (78) est fermée, et que dans cette section est monté, avec possibilité de déplacement, un élément de support (90) qui est aligné avec la tige de verrouillage et est poussé par un ressort contre la face frontale de cette dernière.
  12. Vérin pneumatique selon l'une des revendications 1,3 à 11, caractérisé en ce que les billes (84,85) sont logées dans une douille de manière à pouvoir rouler et se déplacer radialement.
  13. Vérin pneumatique selon les revendications 1,2,4,8 et 9, caractérisé en ce que le piston supplémentaire de verrouillage (78), l'élément de support (90) et le couvercle de butée (80) pourvu de l'espace d'accueil de ressort sont disposés concentriquement, de manière à s'engager au moins partiellement l'un par-dessus l'autre.
  14. Vérin pneumatique selon l'une des revendications précédentes, caractérisé en ce que deux raccords de milieu de pression (trous borgnes 61,62) des deux espaces de cylindre (63,65) sont agencés chaque fois, à la tête (41) de cylindre, et en ce que la tête et le fond (42) du cylindre peuvent être permutés.
  15. Vérin pneumatique selon l'une des revendications 1 à 13, caractérisé en ce que l'un des raccords de milieu de pression (trous borgnes 27 ou 30) des deux espaces (9a, 9b) de cylindre sont disposés respectivement à la tête et au fond du cylindre, et en ce qu'en face de chaque raccord pour le milieu de pression, est disposé un raccord borgne de forme similaire (trou borgne 28 ou 29).
  16. Vérin pneumatique selon l'une des revendications précédentes, caractérisé en ce que la tête (41) du cylindre, le fond (42) du cylindre, le piston de verrouillage (43,75;112), le couvercle de butée (80,80a), les douilles logeant les billes, la tige de verrouillage (70) et l'élément de support (90) sont réalisés en un alliage d'AlCuMgPb.
  17. Vérin pneumatique selon la revendication 16, caractérisé en ce que la tige de piston (51;106) est réalisée en acier V2A.
  18. Vérin pneumatique selon la revendication 1, caractérisé en ce que lorsque la pression tombe au-dessous d'une valeur prédéterminée, la vanne d'inversion de commande (95) établit une liaison de fuite d'air (canaux 104, 105) s'étendant de l'espace de pression de verrouillage (93) au piston supplémentaire de verrouillage (78).
  19. Vérin pneumatique selon la revendication 1 ou 18, caractérisé en ce que la vanne d'inversion de commande (95) comporte une manchette en forme de pot (96) chargé par un ressort et qui ferme d'un côté un perçage de vanne (103), qui est relié à une amenée de milieu de pression, vis-à-vis d'un espace de vanne (102), dans lequel débouchent des perçages radiaux (104,105).
  20. Vérin pneumatique selon la revendication 19, caractérisé en ce que le perçage (103) de la vanne d'inversion de commande (95) est relié de manière à transmettre le milieu de pression, à l'espace de cylindre immédiatement voisin (65) et en ce que les perçages radiaux (104, 105) conduisent à un espace de pression de verrouillage (95) située dans le cylindre extérieur de verrouillage (77).
EP89112178A 1988-10-13 1989-07-04 Vérin pneumatique avec dispositif de verrouillage dans les positions extrêmes, en particulier pour la commande de clapet de fumée Expired - Lifetime EP0363575B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
YU152389A YU48225B (sh) 1988-10-13 1989-07-31 Pneumatski cilindar sa zabravljivanjem u krajnjem položaju, naročito za pokretanje preklopnih ventila za odvod dimnih gasova
SI8911523A SI8911523B (sl) 1988-10-13 1989-07-31 Pnevmatski cilinder z blokado v skrajni legi, zlasti za aktiviranje dimnične lopute
DK385289A DK172502B1 (da) 1988-10-13 1989-08-07 En med endestillingsblokering forsynet trykluftcylinder, især til aktivering af røgaftræksklapper
HU894103A HU214169B (hu) 1988-10-13 1989-08-10 Véghelyzet-reteszeléssel ellátott pneumatikus henger, különösen füstelvezető csappantyúk működtetéséhez
HR930767A HRP930767B1 (en) 1988-10-13 1993-04-02 A pneumatic actuator with locking means in end positions, especially for actuating smoke extractor flues

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8812882U 1988-10-13
DE8812882U DE8812882U1 (fr) 1988-10-13 1988-10-13

Publications (2)

Publication Number Publication Date
EP0363575A1 EP0363575A1 (fr) 1990-04-18
EP0363575B1 true EP0363575B1 (fr) 1994-09-07

Family

ID=6828832

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89112178A Expired - Lifetime EP0363575B1 (fr) 1988-10-13 1989-07-04 Vérin pneumatique avec dispositif de verrouillage dans les positions extrêmes, en particulier pour la commande de clapet de fumée

Country Status (5)

Country Link
EP (1) EP0363575B1 (fr)
AT (1) ATE111190T1 (fr)
DE (2) DE8812882U1 (fr)
ES (1) ES2060701T3 (fr)
YU (1) YU48225B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6071096A (en) * 1997-04-25 2000-06-06 Grasl; Andreas Pneumatic cylinder, in particular for actuating fume extraction valves in fume and heat extraction plants

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0692640A3 (fr) * 1994-06-14 1997-07-30 Rasmussen Kann Ind As Dispositif actionné par un fluide sous, pression pour l'ouverture et la fermature d'une lucarne ou d'une trappe
DE19826129C2 (de) 1998-06-12 2000-07-20 Andreas Grasl Druckluftzylinder zur Betätigung eines einstellbaren Elements, insbesondere einer Rauchabzugsklappe
FR2802985B1 (fr) * 1999-12-23 2002-03-22 Climax S A Verin a point d'arret intermediaire
PL210645B1 (pl) * 2006-01-23 2012-02-29 Rewa Społka Z Ograniczoną Odpowiedzialnością Siłownik pneumatyczno-hydrauliczny z blokadą jego tłoczyska
AT12806U1 (de) * 2011-11-25 2012-12-15 Skardelly Thomas Stellzylinder mit mechanischer ver-/entriegelung
CN117404273B (zh) * 2023-12-14 2024-02-13 扬州鼎驰机械有限公司 一种活塞式空压机

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3397620A (en) * 1966-10-06 1968-08-20 Milwaukee Cylinder Corp Fluid actuator with annular piston locking means
AT302107B (de) * 1970-10-27 1972-10-10 Hoerbiger Ventilwerke Ag Pneumatischer oder hydraulischer Stellzylinder mit einer Einrichtung zur mechanischen Verriegelung seines Stellkolbens
DE7426429U (de) * 1974-08-02 1974-12-19 Esser K Kg Mit einem Druckmedium beaufschlagbarer Arbeitszylinder
US4248138A (en) * 1978-09-19 1981-02-03 Baker Cac, Inc. Fail safe locking mechanism for fluid operated valve actuator
DE2906819C2 (de) * 1979-02-22 1983-05-26 EHP Hugo Krüger KG Elektrik-Hydraulik-Pneumatik, 5828 Ennepetal Druckgasbetätigbarer Doppel-Hubzylinder für insbesondere Lichtkuppeln
DE2911071C2 (de) * 1979-03-21 1985-08-29 4515 Bad Essen Fa. Rolf Andexser Verriegelung für Kolben von Druckmittelzylindern

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6071096A (en) * 1997-04-25 2000-06-06 Grasl; Andreas Pneumatic cylinder, in particular for actuating fume extraction valves in fume and heat extraction plants

Also Published As

Publication number Publication date
ES2060701T3 (es) 1994-12-01
ATE111190T1 (de) 1994-09-15
YU152389A (sh) 1992-09-07
DE58908312D1 (de) 1994-10-13
EP0363575A1 (fr) 1990-04-18
YU48225B (sh) 1997-08-22
DE8812882U1 (fr) 1989-02-16

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