DE1426589C

DE1426589C - Delay element for suddenly connecting an actuating line to a pressure medium line in pneumatic or hydraulic systems after an adjustable delay time

Info

Publication number: DE1426589C
Authority: DE
Inventors: Werner Waidenburg Gueng (Schweiz)
Original assignee: Tschudin und Heid AG
Current assignee: Tschudin und Heid AG

Description

1 21 2

Die Erfindung bezieht sich auf ein Verzögerungs- Bohrung ausfahrenden Kolbenstange des Differentialelement zum nach einer einstellbaren Verzögerungs- kolbens als Führung dienen, wobei im Verlauf des zeit schlagartigen Verbinden einer Betätigungsleitung Ausfahrens der Kolbenstange die Verdickung erst die mit einer Druckmittelleitung in pneumatischen oder äußere der im Durchmesser verringerten Bohrungen hydraulischen Anlagen mit einem durch das Druck- S verschließt und darauf die innere Bohrung freigibt mittel beiderseitig beaufschlagbaren, in einem Zylin- und eine weitere, in Richtung zum Inneren des Zyder geführten Differcntialkolben, wobei das Druck- linders hin'vor der letztgenannten Bohrung radial zur mittel der größeren Fläche des DifTerentialkolbens Längsbohrung des Bodenstücks verlaufende, in eine über eine einstellbare Drossel zugeführt ist und der an das Druckmittelnetz angeschlossene Druckmittel-Differentialkolben über seine Kolbenstange die Ver- io leitung mündende Öffnung über den von der inneren bindung der Leitungen bewirkt. Fläche des Differentialkolbens begrenzten InnenrauniThe invention relates to a delay bore extending piston rod of the differential element to serve as a guide after an adjustable delay piston, wherein in the course of the time abrupt connection of an actuation line extending the piston rod the thickening only the with a pressure medium line in pneumatic or outer of the diameter-reduced bores hydraulic systems with a through the pressure S closes and then releases the inner bore means that can be acted upon from both sides, in one cylinder and another in the direction of the interior of the cylinder guided differential piston, whereby the pressure linder is radially to the front of the last-mentioned bore means of the larger area of the differential piston longitudinal bore of the base piece running into a is supplied via an adjustable throttle and the pressure medium differential piston connected to the pressure medium network Via its piston rod, the opening which opens into the verio conduit via the opening from the inner one binding of the lines. The inner space of the differential piston is limited

Verzögerungseinrichtungen in Betätigungsleitungen des Zylinders und den ringförmigen, kammerartigenDelay devices in the actuation lines of the cylinder and the annular, chamber-like

einzuschalten, ist bekannt. Es ist weiter bekannt, bei Raum mit der in den letzteren einmündenden Boh-to turn on is known. It is also known that in the case of space with the

einem mit Druckmittel betätigten Schaltventil einen rung und der sich an diese anschließenden Betäti-a switching valve operated with pressure medium and the subsequent actuation

Differentialkolben vorzusehen. Schließlich ist auch 15 gungsleitung verbindbar ist.Provide differential piston. Finally, the supply line can also be connected.

schon ein Absperr- oder Steuerventil mit Hilfsventil- Die Erfindung schlägt ferner vor, daß das deralready a shut-off or control valve with auxiliary valve The invention also suggests that the

steuerung bekanntgeworden, das ebenfalls ein Ver- größeren Fläche des Differentialkolbens zugekehrtecontrol became known, which also faced a larger area of the differential piston

zögerungselement darstellt, dessen Differentialkolben Ende des Zylinders mittels eines ein an sich bekann-represents delay element, the differential piston of which at the end of the cylinder by means of a

beiderseits durch das Druckmittel beaufschlagt wird tes Druckmittelfeinregulierventil enthaltenden Ge-is acted upon by the pressure medium on both sides, the pressure medium fine regulating valve containing

und dessen Verzögerungszeiten demzufolge von den ao häuses abgeschlossen ist, das einerseits eine dasand whose delay times are therefore completed by the ao house, on the one hand a that

Druckschwankungen in der Speiseleitung in einem Druckmittelfeinregulierventil mit dem vor der größe-Pressure fluctuations in the feed line in a pressure medium fine control valve with the

gevvissen Maße unabhängig sind. Hierbei wird auch ren Fläche des Differentialkolbens befindlichenJRaumgiven dimensions are independent. Here, the surface of the differential piston is also located

schon dadurch, daß beim öffnen des Ventiltellers der des Zylinders verbindende Anschlußbohrung, ande-the fact that when the valve disk is opened, the connection bore connecting the cylinder, other

Druck, der einerseits bei in Verschließstellung des rerseits eine Anschlußbohrung aufweist, die dasPressure which on the one hand has a connection hole in the closed position on the other hand, which the

über eine Kolbenstange mit dem Kolben verbundenen 35 Druckmittelfeinregulierventil mit einer Leitung ver-35 pressure medium fine control valve connected to the piston via a piston rod with a line

Ventiltellers über ein von seinem Sitz abhebbares bindet, die mittels eines an sich bekannten Dreiwege-Valve plate binds via a liftable from its seat, which by means of a known three-way

Hilfsventil mittels einer Drossel auf der Vollfläche ventils wahlweise mit der Außenluft und der dasAuxiliary valve by means of a throttle on the full area valve optionally with the outside air and the das

des Kolbens verzögert aufgebaut wird, andererseits in Druckmittel der zugehörigen Öffnung des Zylindersof the piston is built up delayed, on the other hand in pressure medium of the associated opening of the cylinder

dem Raum, der von der der Vollfläche gegenüber- zuführenden Druckmittelleitung verbindbar ist.the space that can be connected by the pressure medium line opposite the full area.

liegenden Ringfläclie des Kolbens begrenzt wird und 30 Durch die erfinderischen Maßnahmen wirdlying annular surface of the piston is limited and 30 by the inventive measures

in den die Speiseleitung einmündet, kurzzeitig zum Bekanntem gegenüber der wesentliche technischeinto which the feed line opens, briefly to the familiar to the essential technical

Zusammenbrechen gebracht wird, erreicht, daß dieser Fortschritt erzielt, daß der Differentialkolben infolgeIs brought to collapse, achieved that this advance achieved that the differential piston as a result

einmal umgeleitete öffiuingsvorgang schlagartig er- seiner besonderen Anordnung und seiner besondersOnce the opening process has been redirected, it suddenly has its special arrangement and its peculiarity

folgt. ausgestalteten Kolbenstange nach Beginn der Ver-follows. designed piston rod after the start of the

Bei diesem letztgenannten, vorbekannten Verzöge- 35 Schiebung noch einen gewissen Weg zurücklegen riingseleinent ist jedoch der Differentialkolben so an- muß, wobei durch das Anwachsen des Überdruckes geordnet, daß er schon bei Beginn seiner Verschie- im Raum zwischen der Kolbenaußenfläche und dem bung ein schlagartiges öffnen des Ventiltellers zu den dieser zugekehrten Ende des Zylinders, das durch die Abgängen hin und damit ein ebensolches Einschalten infolge von Ungenauigkeiten bzw. Unregelmäßigder Betätigungsleitung erwirkt. Es ist dabei aber sehr 40 keiten eintretende Behinderung der Kolbenbewegung unsicher, wann der Kolben sich zu verschieben be- verursacht wird, der Kolben entsprechend rascher ginnt. Hs kann dies einmal etwas früher, ein anderes verschoben wird, so daß eine rasche Kompensierung Mal etwas später der Fall sein, je nachdem, wie fest der zusätzlich verursachten Verzögerung der Kolbender Kolben im Zylinder sitzt, was in erster Linie von verschiebung erreicht wird und unabhängig davon, tier Temperatur abhängig ist. 45 ob z. B. die Dichtung des Differentialkolbens im Zy-With this last-mentioned, previously known delay shift, still cover a certain distance However, the differential piston must be riingseleinent, whereby due to the increase in overpressure arranged that he already at the beginning of his displacement in the space between the piston outer surface and the Exercise a sudden opening of the valve plate to the end of the cylinder facing this, which is through the Exits and thus a similar switch-on due to inaccuracies or irregularities Actuation line achieved. However, there is a very great obstacle to the movement of the piston unsure when the piston will be caused to shift, the piston correspondingly faster starts. This can happen a little earlier, another shifted, so that a rapid compensation Sometimes a little later, depending on how firmly the additional delay caused by the piston tenders The piston sits in the cylinder, which is primarily achieved by displacement and regardless of animal temperature is dependent. 45 whether z. B. the seal of the differential piston in the cylinder

Demgegenüber besteht die der Erfindung zugrunde linder am Anfang dessen Verschiebung etwas festliegende Aufgabe darin, ein Verzögerungselement der klebt oder nicht, die Verbindung zwischen Speisegenannten Art zur Verfügung zu stellen, mit dem und Betätigungsleitung stets zum gleichen, gewünschtrot/, etwa auftretender Schwierigkeiten vorgenannter ten Zeitpunkt erfolgt. Der Nachteil, den andere, vor-Art und trotz Druckschwankungen im vom Druck- 50 bekannte Verzögerungselemente für pneumatische mittel durchströmten Netz die einstellbare Verzöge- und Hydraulische Anlagen aufweisen, bei denen ein rungs/.eit mit größtmöglicher Genauigkeit einhalt- federbelasteter Kolben in einem Zylinder durch das bar ist. Druckmedium verschoben wird und sich damit dieIn contrast, the invention is based on the beginning of the shift somewhat fixed The task is to provide a delay element that sticks or not, the connection between the feed-mentioned type, with which and the actuation line always to the same, desired red /, any difficulties occurring before mentioned th point in time. The downside to the other, pre-kind and in spite of pressure fluctuations in the delay elements known from the pressure 50 for pneumatic medium-flow network with adjustable deceleration and hydraulic systems in which a rungs / .eit with the greatest possible accuracy compliance spring-loaded piston in a cylinder through the is cash. Media is moved and thus the

Hin solches Verzögertingselement ist erfindungs- Zuströmgeschwindigkeit und die Verschiebegeschwingemäß dadurch gekennzeichnet, daß an das eine Ende 55 digkeit dieses Kolbens in gewissen Grenzen frei wähdes dem Differentialkolben zugehörigen Zylinders ein len lassen, und der darin besteht, daß die Verzöge-Uodenstück angeschlossen ist, das eine sich in der rungszeit nicht nur von der einstellbaren Zustrom-Verlängerung der Längsachse des Zylinders erstrek- geschwindigkeit des Druckmediums, sondern auch kende Bohrung aufweist, deren Innendurchmesser an von dessen Druckschwankungen abhängt,.wird ebenihrer äußeren Mündung und an einer dem Inneren 60 falls durch,das Verzögerungselement nach der Erfiniles Zylinders näher gelegenen Stelle je über einen dung vermieden. Letzteres weist keine Feder mit kon-Teil ihrer Lunge verringert ist, welche im Innendurch- stanter Federkraft auf, und die auf beide Seiten seines messer verringerten Bohrungen einen zwischen ihnen Differentialkolbens einwirkenden Druckschwankungebikleteii, ringförmigen, kammerartigen Raum be- gen können keine schädlichen Einflüsse ausüben, vorgrcn/en, in den eine radial zur Bohrung \erlaufende, 65 ausgesetzt, daß sie ein gewisses Maß nicht überinil der Betiitiguiigsleiiiing verbundene Bohrung mün- steigen.Such a delay element is the inflow velocity and the displacement oscillation according to the invention characterized in that at one end 55 this piston is free within certain limits the differential piston associated cylinder let a len, and that consists in the fact that the delayed Uodenstück is connected, the one in the rungszeit not only from the adjustable inflow extension the longitudinal axis of the cylinder, but also the speed of the print medium kende bore, the inner diameter of which depends on its pressure fluctuations, .will also their outer mouth and at one of the inner 60 if through, the delay element according to the invention Cylinder closer to each location avoided via a manure. The latter has no spring with a con-part her lungs are diminished, which spring force on the inside, and which on both sides of his diameter, reduced bores, a pressure fluctuation acting between them, differential piston, ring-shaped, chamber-like space cannot exert any harmful influences, in the one extending radially to the bore, 65 exposed so that it does not exceed a certain extent the borehole connected to the investment line.

del, und einer Vculiekiing der während des Ablaufs Dadurch, daß der Zylinderboden erfindungsgemäßdel, and a Vculiekiing the during the course of the fact that the cylinder bottom according to the invention

der Verzögcriings/eil mit ihrem freien linde aus der nach einem gewissen Verschiebeweg geöffnet wird,the decelerating / eil with its free linden tree from which it is opened after a certain displacement,

Claims

3 43 4

it is possible to supply an extremely precise switching but delayed compressed air pulse

to give impulse, because in the moment in which should.

the bottom is opened, which pulls this bottom - the functioning of the depicted delayed device Piston side is relieved and the piston rungselementes is extremely simple: The can suddenly move a little further, completely 5 compressed air line 7 is connected to the compressed air network Difference to the spring-loaded piston, the sen and acted upon through the opening 6 and the move the slower, the more the inside of the cylinder 1, the smaller the piston area of the Spring is compressed. In the case of the differential piston 2 according to the invention, the connection of the pressure-related delay element is then also possible borrowed, as desired, a mechanical or what io bore 8 sealed thickening 9 α of the piston often it is desired to interrupt a pneumatic pulse rod 9. The line 25 is through the gain weight. · Three-way valve 23 completed, which in turn

An embodiment of the invention, which also digests the connection bore 15 with the atmosphere Possibility to recognize is in the only one binds. The differential piston 2 of the delay figure the drawing shown in longitudinal section, 15 element is therefore in the drawing where the pressure lines are only shown schematically, and the line 24 is also are tet. connected to the outside air. As soon as the three

The actual delay element has an actuated directional control valve 23, d. H. the compressed air line 7 with Cylinder 1, in which one is connected to an O-ring 3 of the connection bore 15, flows provided differential piston 2 is displaceable. The ao compressed air through the compressed air fine control valve 13 in Cylinder 1 is on one side through a bottom- the cylinder 1 on the right side of the differential piece'4 completed, the one in extension piston 2 and begins this against the on-his the longitudinal axis of the cylinder 1 extending Boh- left side surface acting air pressure with con, -rung 12 '. This bore 12 'is at its stanter, from the setting of the regulating valve 13 outer mouth and at a distance from this after the »5 dependent, on the pressure fluctuations in the Inside the cylinder 1, however, the inside diameter of the compressed air line 7 is essentially independent. Those formed in this way, inside giger speed to shift to the left. In diameter smaller holes 12 and 8 are depending on the result is now first through the thickening 9 a provided with an O-ring 5, and the piston rod 9 guides the bore 12 of the space 10 rod 9. In the between the holes 12 and 8 30 closed. If you move it further, the formed annular, chamber-like space 10 bore 8 released so that the differential opens a radial to the bore 12 'extending piston 2 on its left side briefly as a result of the tion 11, at the outer mouth of which a line 24 in the line 24 prevailing lower pressure connected. The bottom piece 4 also has a is relieved and quickly moves even further to the left opening 6 extending radially to bore 12 'is moved to 35. By the fact that the bore 8 is released Connection of the compressed air line 7 on. The piston becomes, the compressed air line 7 with the line 24 Rod 9 has a connection over part of its length. As soon as the three-way valve 23 is back in thickung9a, so that when the differential is the original, i.e. in the one in the drawing darkob 2 returns to the position shown in the figure, the right side of the finds, the bore 8 closes, while then, 40 differential piston 2 unloaded, and the differential when The differential piston 2 a certain amount of piston returns to its original position, after which has shifted to the left in the drawing, through immediately the line 24 from the inside of the compressed air cylinder is connected to the chamber 10. line 7 is disconnected. The speed of development

The fact that the air is made up of these few parts by the compressed air fine control

delay element or the valve 13 of the base piece 4 is independent of the setting of the spindle 17.

opposite end of the cylinder 1 is hanging on the side, since the air surrounding the needle seat 19

of the differential piston, which completely compresses the pressure of the sealing sleeve 20 and around

incoming pressure medium, so here the pressure - this cuff can escape,
air, is exposed, a designated as a whole with 13,

known compressed air fine control valve an- 50. Patent claims:
closed. It essentially consists of a 1st delay element for the adjustable delay time provided with two connection bores 14 and 15, in which a regulating needle 18 binds an actuating line with a pressure element of a spindle 17 relative to one in a sealing medium line in Pneumatic or hydraulic sleeve 20 held needle seat 19, with a pressure slide mounted so that the size of the medium can be acted upon on both sides, adjust very finely in a flow opening and guided with the cylinder differential piston, whereby the lock nut 22 can be fixed . Pressure medium of the larger area of the differential

The connection bore 14 opens into the cylindrical piston via an adjustable throttle 1 or in an adjacent to the cylinder 60, and the differential piston over its Room 21. The connection of the lines to the connection hole 15 is legs via the piston rod Line26 a three-way valve23 of any construction acts, characterized in that on kind, which is z. B. also around an electric valve that closes one end of the differential piston (2) can act, and a line 25 to the cylinder (1) belonging to the opening a base piece (4) annung6 Connected compressed air line 7 is connected 65 is closed, the one in the extension sen, while the line 24 on the longitudinal axis of the cylinder (1) extending to the bore 11 is closed, which has a bore (12 ') through the three-way valve, the inner diameter of which 23 controlled, by the Vemiyerungselement each at its outer mouth and at one of the

Inside of the cylinder (1) closer location is reduced over part of their length, which bores (12 or 8) with reduced inner diameter delimit an annular, chamber-like space (10) formed between them, into which one radially to the bore (12 ') running bore (11) connected to the actuating line (24) opens, and a thickening (9 α) of the piston rod (9) of the differential piston (2) which extends with its free end from the bore (12) during the delay time. serve as a guide, whereby in the course of the extension of the piston rod (9) the thickening (9 α) first closes the outer bore (12) and then releases the inner bore (8) and another towards the inside of the cylinder (1) in front of the bore (8) radially to the bore (12 ') in the base (4), opening (6) opening into a pressure medium line (7) connected to the pressure medium network via the opening (6) delimited by the inner surface of the differential piston (2) th interior of the cylinder (1) and the space (10) with the bore (11) and the actuating line (24) connects.

2. Delay element according to claim 1, characterized in that that of the larger Surface of the differential piston (2) facing the end of the cylinder (1) by means of a one per se known pressure medium fine regulating valve (17, 18, 19) containing housing (16) is closed, on the one hand a pressure medium fine control valve (17, 18, 19) with the one in front of the larger one Area of the differential piston (2) located space (21) of the cylinder (1) connecting the connection bore (14), on the other hand, has a connection bore (15) which the pressure medium fine regulating valve (17,18.19) connects to a line (26), which by means of a known per se Three-way valve (23) optionally with the outside air and the pressure medium of the opening (6) of the The cylinder (1) supplying pressure medium line (7) can be connected.

Hierzu 1 Blatt Zeichnungen1 sheet of drawings