DE1452164C

DE1452164C - Control valve for descaling systems equipped with spray nozzles with charging by low pressure and high pressure liquid streams

Info

Publication number: DE1452164C
Authority: DE
Inventors: Willy 7316 Kongen Herold
Original assignee: Werner & Pfleiderer, 7000 Stuttgart Feuerbach
Publication date: 1971-05-13

Description

1 21 2

Die Erfindung betrifft ein Steuerventil für mit innerhalb des Ventilgehäuses derart verschiebbar ist, |The invention relates to a control valve for being displaceable within the valve housing in such a way |

Spritzdüsen versehene Entzunderungsanlagen mit daß nach Maßgabe der jeweiligen Kolbenstellung Beschickung durch Niederdruck- und Hochdruck- eine zu den Spritzdüsen führende Leitung stetig mit flüssigkeitsströme, dessen einen hubbewegten Kolben einem Hoch- bzw. Niederdruckstrom beschickt wird aufnehmendes Gehäuse Anschlüsse für diese Ströme 5 und die Druckflächen des Kolbens so ausgelegt sind, aufweist. daß die Summe der in einerseits gleicher Druckrich- ίSpray nozzles provided descaling systems with that according to the respective piston position Feeding through a low-pressure and high-pressure line leading to the spray nozzles is always included liquid streams, one of the reciprocating pistons of which is fed to a high or low pressure stream receiving housing connections for these currents 5 and the pressure surfaces of the piston are designed so having. that the sum of the on the one hand the same printing direction ί

In Warmwalzwerken sowie in Schmiedebetrieben tung wirkenden Kräfte größer ist als die Summe der werden vielfach hydraulische Entzunderungsanlagen andererseits in entgegengesetzter Druckrichtung wirverwendet, die eine schnelle und wirkungsvolle Ent- kenden Kräfte.The forces acting in hot rolling mills and forging operations are greater than the sum of the Hydraulic descaling systems are often used, on the other hand, in the opposite direction of pressure, the quick and effective discovering powers.

zunderung ermöglichen. Die Anlagen bestehen aus 10 Weitere Merkmale der Erfindung ergeben sich aus ;enable scaling. The systems consist of 10 Further features of the invention emerge from;

mit Düsen besetzten Rampen, die während des Ent- den Unteransprüchen.ramps occupied by nozzles, which during the de- the subclaims.

zunderungsvorganges mit einem Hochdruckflüssig- Durch die sich ergebende Zwangssteuerung desscaling process with a high-pressure liquid- By the resulting forced control of the

keitsstrom beschickt werden, der aus den Düsen Hochdruck- und Niederdruckstromes sperrt das herausgepreßt wird und auf das zu entzundernde Steuerventil bei Ausfall oder Absinken der Flüssig-Werkstück einwirkt. Bei einer in der Praxis bekann- 15 keitsströme unter einem gegebenen Mindestwert ten Anlage dieser Art werden die Düsenrampen in selbsttätig die entsprechenden Stromkreise, und es !keitsstrom are charged, which blocks the high pressure and low pressure stream from the nozzles is pressed out and on the control valve to be descaled in the event of failure or sinking of the liquid workpiece acts. In the case of a current known in practice below a given minimum value th system of this type, the nozzle ramps in automatically the corresponding circuits, and it!

den Spritzpausen mit einem Niederdruckflüssigkeits- kann gegebenen Betriebsverhältnissen, z.B. durch strom beschickt, um innerhalb der Düsen der Düsen- entsprechende Bemessung .des Hochdruckstromes, rampen oder der zugeordneten Leitungssysteme Luft- der das Verschieben des Kolbens bewirkt, oder einschlüsse zu vermeiden, die beim nachfolgenden 30 der von diesem beaufschlagten Flächen angepaßt Einschalten des Hochdruckflüssigkeitsstromes Beschä- werden.the pauses in spraying with a low-pressure fluid - can be given operating conditions, e.g. by current charged to within the nozzles of the nozzle - corresponding dimensioning of the high pressure flow, ramps or the associated air line system that causes the piston to move, or to avoid inclusions, which are adapted in the subsequent 30 of the areas acted upon by this Switch on the high pressure liquid flow.

digungen innerhalb der Anlage verursachen können. In der Zeichnung ist ein Ausführungsbeispiel der r~. , can cause damage within the system. In the drawing, an embodiment of the r ~. ,

Die Niederdruckseite ist gegen die Hochdruckseite Erfindung dargestellt, und zeigt ^J 'The low pressure side is shown against the high pressure side invention, and shows ^ J '

über ein Rückschlagventil abgeschlossen, das von F i g. 1 eine Einrichtung zum Entzundern-mit zweiCompleted via a check valve, which is shown in FIG. 1 a device for descaling - with two

dem eingeschalteten Hochdruckflüssigkeitsstrom ge- 35 Düsenrampen und Steuerorganen in schematischer schlossen gehalten wird. Darstellung,35 nozzle ramps and control elements in a schematic view of the switched-on high-pressure liquid flow is kept closed. Depiction,

Es hat sich gezeigt, daß die Anordnung derartiger Fig. 2 einen Längsschnitt durch ein SteuerventilIt has been shown that the arrangement of such FIG. 2 is a longitudinal section through a control valve

Rückschlagventile in getrennten, an die Düsenrampen der Einrichtung gemäß F i g. 1 in Arbeitslage und
angeschlossenen Niederdruckstromkreisen Nachteile F i g. 3 einen Längsschnitt durch das SteuerventilCheck valves in separate, attached to the nozzle ramps of the device according to FIG. 1 in working position and
connected low-pressure circuits Disadvantages F i g. 3 shows a longitudinal section through the control valve

wegen ihrer Störanfälligkeit haben. So ist es beispiels- 30 gemäß Fig. 2 mit einer anderen Lage des Kolbens, weise nicht immer möglich, die Einbaulage der Rück- Zwischen einer oberen und einer unteren, mitbecause of their susceptibility to failure. So it is for example 30 according to FIG. 2 with a different position of the piston, wise not always possible, the installation position of the rear Between an upper and a lower, with

schlagventile so zu wählen, daß ein Festklemmen Düsen 1 besetzten Rampe 2 bzw. 3 wird das in der vermieden wird, insbesondere wenn sich Korrosions- Zeichnung strichpunktiert angedeutete Werkstück, einflüsse oder Verunreinigungen der Niederdruck- beispielsweise ein Walz- oder Schmiedestück 4 einflüssigkeit auswirken können. Wenn ein Rückschlag- 35 gesetzt und von aus den Düsen 1 unter hohem Druck ventil nicht zuverlässig arbeitet, strömt ein Teil des . austretenden Flüssgkeitsstrahlen entzundert.
Hochdruckstromes in den Niederdruckstromkreis, Die Versorgung der Rampen 2, 3 mit Hochdruck-To choose impact valves so that jamming nozzles 1 occupied ramp 2 or 3 is avoided in the, especially if corrosion drawing dash-dotted workpiece, influences or contamination of the low pressure, for example a rolled or forged piece 4 can affect. If a check valve is set and does not work reliably from the nozzles 1 under high pressure, part of the flows. Descaled escaping liquid jets.
High pressure flow into the low pressure circuit, the supply of ramps 2, 3 with high pressure

was zu Betriebsstörungen und Schädigungen der flüssigkeit erfolgt über Leitungen 5, 5' die von einer Anlage führt und außerdem einen Energieverlust zur an ein schematisch angedeutetes Steuerventil 6 anFolge hat, der die Wirtschaftlichkeit der Gesamt- 40 geschlossenen Leitung 7 gespeist werden,
anlage mindert. Wie aus F i g. 1 der Zeichnung weiter hervorgeht,This leads to malfunctions and damage to the liquid via lines 5, 5 'which lead from a system and also results in a loss of energy to a schematically indicated control valve 6 which feeds the economy of the overall 40 closed line 7,
plant reduces. As shown in FIG. 1 of the drawing further emerges,

Der Erfindung liegt die Aufgabe zugrunde, diese wird das Steuerventil 6 über eine Hochdruckleitung 8 Nachteile zu vermeiden und eine Anlage mit einem mit zwischengeschaltetem Schieber od. dgl. 9 mit ·,..,_ ohne Federungsmittel arbeitenden Steuerventil zu einem Hochdruckflüssigkeitsstrom und über eine VJi schaffen, bei welcher eine zwangsläufige und sichere 45 Niederdruckleitung 10 mit eingeschaltetem Absperr-Trennung des Hochdruck- und Niederdruckstrom- ventil 11 mit einem Niederdruckflüssigkeitsstrom verkreises gewährleistet ist, wobei gleichzeitig Fehler- sorgt. An das Steuerventil 6 ist eine weitere Leitung quellen ausgeschaltet sind, die sich aus der Ver- 12 angeschlossen, die als Antriebsleitung dient und wendung von gegen den Hochdruckstrom wirkenden über ein Ventil 13 von einer einen Hochdruckflüssig-Rückschlagventilen ergeben könnten. 50 keitsstrom führenden Leitung 14 gespeist wird, wobeiThe invention is based on the object that the control valve 6 is controlled via a high-pressure line 8 Avoid disadvantages and a system with an interposed slide or the like 9 with ·, .., _ control valve operating without spring means to a high pressure liquid flow and via a VJi create in which an inevitable and safe 45 low-pressure line 10 with shut-off separation switched on of the high pressure and low pressure flow valve 11 with a low pressure liquid flow circuit is guaranteed, while at the same time providing error. Another line is connected to the control valve 6 sources are switched off, which are connected from the connection 12, which serves as the drive line and application of acting against the high pressure flow via a valve 13 of a high pressure liquid check valve could result. 50 keitsstrom leading line 14 is fed, wherein

Bei der Lösung dieser Aufgabe geht die Erfindung die Leitung 14 gleichfalls ein Absperrventil 15 aufvon der aus der deutschen Auslegeschrift 1016 086 weist. 'In solving this problem, the invention also opens the line 14 to a shut-off valve 15 which points from the German Auslegeschrift 1016 086. '

erkennbaren Lehre aus, daß durch unterschiedlich Das Ventil 13 ist als ⁸/₂ Wegeventil ausgebildet undrecognizable teaching from that by different The valve 13 is designed as an ⁸ / _2-way valve and

bemessene Kolben in einem Steuerventil eine dieses wird von einem Hilfsventil 16 gesteuert, welches in willkürlicher Stellung haltende Kraft bestimmbar 55 zweckmäßig als druckluftbetätigtes Ventil ausgebildet ist, wobei ein Hilfsventil durch Entlastung einer ist und über eine gestrichelt dargestellte Druckluft-Kolbendruckfläche und entsprechender Drucksteige- leitung 17 mit zwischengeschaltetem Absperrventil 18 rung auf der anderen Kolbenfläche die Ventilstellung gespeist wird.sized piston in a control valve this is controlled by an auxiliary valve 16, which holding force in an arbitrary position determinable 55 expediently designed as a compressed air-actuated valve is, wherein an auxiliary valve is one by relieving and via a compressed air piston pressure surface shown in dashed lines and a corresponding pressure riser line 17 with an interposed shut-off valve 18 tion on the other piston surface the valve position is fed.

bewirkt. Durch die deutsche Auslegeschrift 1128 242 In Fig. 2 der Zeichnung ist das Steuerventil imcauses. By the German Auslegeschrift 1128 242 In Fig. 2 of the drawing, the control valve is in

ist überdies bekannt, bei einem Ventil mit Antrieb 60 Schnitt dargestellt, wobei die Leitungen 7, 5, 5C und durch einen druckbeaufschlagten Kolben einen die Düsenrampen 2,3 schematisch veranschaulicht inneren Kanal vorzusehen. sind. Das aus zwei teilen 6', 6" bestehende Ge-is also known to provide a section of a valve with drive 60, the lines 7, 5, 5C and, by means of a pressurized piston, an inner channel, illustrated schematically, to provide the nozzle ramps 2, 3. are. The structure consisting of two parts 6 ', 6 "

Die Erfindung kennzeichnet sich dadurch, daß der häuse 6 weist endseitige Anschlußflansche 18, 18' Kolben gegeneinander wirkende, vom Hochdruck- und 19 für die Verbindung des Steuerventils mit der strom beaufschlagte Druckflächen aufweist, von 65 Hochdruckleitung 8 bzw. der Niederdruckleitung 10 denen eine innerhalb eines besonderen Druckraumes auf. Für die zu den DUsenrampen 2,3 führende Leiliegt, wobei der Kolben bei deren Zu- und Ab- tung 7 und die Antriebsleitung 12 sind innerhalb des schalten von einem Flüssigkeitsstrom zwangsweise Gehäuseteil 6', Bohrungen 7' bzw. 12' vorgesehen,The invention is characterized in that the housing 6 has end connection flanges 18, 18 ' Pistons acting against one another, from the high pressure and 19 for the connection of the control valve with the having pressure surfaces acted upon by current, of 65 high pressure line 8 or the low pressure line 10 which one within a special pressure chamber. For the line leading to the shower ramps 2,3, wherein the piston in its inlet and outlet 7 and the drive line 12 are within the switching of a liquid flow compulsorily housing part 6 ', bores 7' or 12 'provided,

Claims

3 - ■ ■ ; . 43 - ■ ■; . 4th

which moves into corresponding pressure spaces 25 and 7 "of the, while at the same time the supply of high control valve flow out. . hydraulic fluid through line 8 inevitably

Inside the control valve is a movable lock. Since when moving the piston 20 Piston 20 received, the end side, essentially given by the sealing sections 21 and 22 liquid cylindrically shaped sealing sections 21, 5 is forced, there is a damping effect, 22 with conical seat surfaces 21 ', 22' and which softly open and close the control unit secures corresponding sealing surfaces in the housing valve.

parts 6 ', 6 "inserted bushings 23, 24 together - To prevent the occurrence of harmful air inclusions, acts so that depending on the position of the particular in the nozzle 1 or the nozzle piston 20 either the IO ramps 2, 3 or the associated lines 5 ', 5 within the control valve To avoid high pressure side 8 or the low pressure side 10 and 7 is blocked when closing occurs is. ßen the high pressure line 8, the low pressure line

When the nozzle ramps 2, 3 via the control valve free from the 10 from the sealing section 22 of the piston 20 line leading to the nozzle ramps. given, so that the Niedergen acting as a filling flow 7, 5 and 5 'are supplied with hydraulic fluid 15 pressure fluid flow via a transverse bore 29 to should, the piston 20 takes within the control of the low-pressure side 10 facing sealing valve the in F i g. 2 of the drawing, the section 22 of the piston shown, a longitudinal channel 30 inner layer a, so that pressure fluid from the in the half of the piston 20 (which from the longitudinal channels Control valve opening high pressure line 8 in FIG. 27 is independent) and one to the sealing section 21 Pressure chamber 7 ″ and through the bore 7 'into the pipe ao of the piston 20 facing transverse bore 31 (which device 7 and via the line parts 5,5 'to the nozzle in the with the bore 7' in connection ramps 2, 3 and nozzles 1. Pressure chamber 7 "of the control valve opens) the line

The position of the piston 20 within the housings 7, 5, 5 'and thus the nozzle ramps 2, 3 6', 6 "is inevitably passed through one of. The position of the piston 20 is determined by the line 14 via the Valve 13, the drive »5 through the bores 27, 28 in the pressure chamber 26 line 12 and the bore 12 'in a pressure chamber in the direction of arrow c acting high pressure flow, 25 of the control valve directed high pressure fluid and in the same direction according to Arrow d set current, since the secured on a corresponding, acting low-pressure flow,
within the pressure chamber 25 of the control valve be ■ Should the nozzles 1 of the nozzle ramps 2, 3 acting 30 set a new workpiece 4 again pressure-pressure in the direction of the arrow α together with the liquid to be supplied to the fluid, then valve 13 is actuated via the auxiliary valve 16 acting on the end face of the compressed air-actuated piston 20 or its sealing section 21, shown on the left in the drawing, so that the pressure in the direction of arrow b is greater than that on. High-pressure line 14 and the high-pressure liquid pressure chamber 25 acting in the direction of arrow c and the pressure chamber 25 against the pressure area 25 'of the keitsstrom (which flows through longitudinal channels 27 in the piston 20, piston 20) , whereby the direction with transverse bores 28 in a pressure chamber 26 of the forces directed by the arrows α and b become effective, control valve is directed) and to which the, as already mentioned, are larger than the drawing on the right end of the piston 20 and 40 opposite in the direction of arrows c and d wir its sealing portion 22 in the direction of arrow d kenden forces, so that the piston 20 again its acting pressure of the low-pressure flow. The in Rieh in F i g. 2 of the drawing assumes the position shown by the arrows α and b acting forces are therefore The line 14 leading to the valve 13 is, as is larger than the opposite in the direction shown in the drawing according to FIG. 2 and 3, arrows c and d acting forces and thus hold 45 of the high-pressure liquid flow in the line 8, the piston 20 in its in FIG. 2 of the drawing branched off. But you can also from another position so that the low pressure line 10 are fed pressure source, which is blocked opposite one and the nozzles 1 of the ramps 2 and 3 of the pressure prevailing in the line 8 are supplied with spray water. . has different pressure.

The size of the pressure on the respective pressure surfaces of the 50 on the other hand, the compressed air line 17 to Forces acting on the piston 20 can also be used in controlling the auxiliary valve 16 or in the line simply by the size of the »individual 17 switched-on slide 18 or the like with an at-pressure area depending on the height of, for example, built into the Niederdnick line 10, respective high-pressure or low-pressure liquid safety current not shown in detail in the drawing to be determined. 55 equipment to be coupled in such a way that at

If, however, the high pressure flow is blocked, d. H. a failure of the low-pressure liquid flow,

So the spraying activity of the nozzles are ended, which releases the high pressure liquid flow

then the valve 13 will not respond via the compressed air operated valve 13.
Auxiliary valve 16 opened and the pressure chamber 25 over

the line 12 and the one connected to the valve 13.

This line 13 'emptied and the surface 25' of the 1st control valve for spray nozzles

Piston 20 relieved, so that the pressure in the direction of descaling systems with charging through

of the arrow α is reduced to zero. This means that - low-pressure and high-pressure liquid flows,

the one moving piston receiving the acting in the direction of arrows c and d

Forces greater than that in the direction of arrow b 63 housing has connections for these currents,

acting force and the piston 20 is characterized from the in that the KoI-

F i g. 2 of the drawing shown position to the left in ben (20) counteracting, from the high-

the in F i g. 3 has the position shown in the drawing pressurized flow pressure surfaces,

one of which (25 *) lies within a special pressure chamber (25), the piston (20) being forcibly displaceable within the valve housing (6 ', 6 ") when it is switched on and off by a flow of liquid in such a way that according to the In each piston position, a line (7) leading to the spray nozzles (1) is continuously charged with a high or low pressure flow and the pressure surfaces of the piston are designed so that the sum of the forces acting in the same pressure direction (α and b) is greater as the sum of the forces acting on the other hand in the opposite pressure direction (c and d) . '-,. ■' \, 2. Control valve according to claim 1, characterized in that the connections for the high pressure line (8) and the low pressure line (10) are each connected to one end face of the housing (6) are provided and the piston (20) has differently dimensioned sealing sections ao (21, 22) on both end sides.

3. Control valve according to claim 2, characterized in that the piston (20) longitudinal channels (27, 30), one of which (30) has a connection when the low-pressure connection (10) is open. Connection to the line (7) connected to the housing (6 ', 6 ") to the spray nozzles (1), while the other channel (27) provides the high-pressure connection (8) constantly connects to a pressure chamber (26) delimited by one of the pressure surfaces (26 ') of the piston (20).

4. Control valve according to one of claims 1 to 3, characterized in that it is a externally controlled valve (13) is assigned, which via a line (14) to the high pressure line (8) and is connected via a line (12) to the pressure chamber (25), which is on the piston side of the Printing area (25 ') is limited.

5. Control valve according to claim 4, characterized by a position of the valve (13) determining, externally controlled auxiliary valve (16) which is arranged in a line (17) and with an in the safety device that is switched on can be coupled to the low-pressure circuit.

1 sheet of drawings