DE6609730U - MULTI-WAY VALVE. - Google Patents

Description

DlPL-ING. HORST ROSE Dl PL-ING. PETER KOSEL PATE NTAN WALTE

3353 Bad Gandersheim, June 14, 1972 P.O. Box 129 Hohenhöfen 5 Telephone: (05382) 2842 Telegram address: Siedpatent Badgahdersheim

Gbm P 33 988/47 g Our file no. 2468/20

Alfred Fischbach, Ründeroth

Alfred Pischbach -o

Multi-way valve

\ M

The invention relates to a multi-way valve for hydraulic systems, in particular for hydraulically driven machines in pressure storage operation with an in a housing containing the pressure medium lines between two end positions adjustable slide.

In hydraulically driven machines, for example in presses, forming machines and other machines and in particular for injection molding machines for thermoplastic compositions ζ it is during operation of the hydraulic system

with a pressure accumulator mostly necessary, the pressure medium to be taken from the pressure accumulator before the individual To limit the amount of consumer points and to adjust them to the desired speed in each case the hydraulic consumer is reached. The ones used to control such hydraulic systems known valves of the type indicated always lead to a complete opening or closing of the respective pressure medium line, since the slide either completely releases the associated control openings or completely

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BanlckonlorNorddeulsdieLandesbanlcHIialeBad Bandershelm, account number 22.118.970 - Postsdiedtkonlo: Hannover66715

66 09 73 Q 14.9.72

970

closes. It was therefore always necessary in the known hydraulic systems, a separate one in each case Connect the flow regulator in the pressure medium line to the respective consumer and use this additional flow regulator to carry out the required quantity limitation.

The invention is based on the object j ^ a Meiir · way valve of the above-specified type to create, by means of which the required amount without limitation additionally ätzliche elleitungen in the printing Mitt s total switched construction parts such as flow regulators can be performed.

This /._ - '\ is achieved according to the invention by j such a travel restriction of the slide that the slide in its respective end position with the associated control opening or openings in the pressure medium lines Forms throttle parts. This ensures that the valve always executes the correct / quantity limitation even with the appropriate control, so that additional quantity-limiting Components in the pressure medium lines of the individual consumers are avoided. This results in a decisive simplification of the hydraulic system, which significantly reduces the effort and costs will. The ocLer lSxigs? SrstsHfe & r (The trained slide does not move into the furthest possible end position with the appropriate drive, but rather -sures the travel restriction that the slide according to its respective training in the now released Pressure medium line switches on a flow-limiting throttle part. Appropriate means can be used to Make path restriction adjustable.

a valve with electromagnetic Schielber drive a particularly simple design is used as an Implementation of the invention achieved by one or more

adjustable and lockable stops for the or those with the Magnetic cores connected to the slide. This means that the path can be restricted in a simple manner using the magnetic cores, while the hydraulic part remains unaffected and thus undisturbed.

In such an embodiment of the valve, in which one or more coil hoods arranged on the valve housing are also provided for the electromagnets , the path restriction can be particularly simple

Way can be achieved in a further embodiment of the invention that in each case in the end face of the spool hoods a lockable viewing system is screwed in. against which the magnetic core rests on the end face in the slide end position to limit the travel of the slide. The magnetic core, which is moving axially in the bobbin case anyway, can be constructed in this way in the simplest possible way can be used to limit the travel, the stop being screwed into the end face of the bobbin case only must be grounded.

According to a further embodiment of the invention the path restriction is achieved in a simple manner by adding an outwardly guided slide or the magnetic core Rod carries, on the lockable and lockable stops can be screwed, which are used to limit the path in the slide end position on the outside of the valve body. This embodiment is also particularly suitable for a valve with pressure medium actuation, that is to say for a so-called valve pilot operated slide.

In the drawing, two exemplary embodiments of a multi-way valve according to the invention are shown. The working examples relate to valves with a longitudinally adjustable slide. The invention is equally advantageous can also be used for valves with rotary slide valve. Show it:

1 shows a longitudinal section through an electromagnetically operated 4-way valve with the slide in the middle position,

Pig. 2 shows the longitudinal section according to FIG. 1 with the slide in one of its end positions,

Fig. 3 is a partial longitudinal section through a Druckmittelbexätiges Valve, alsv with Vurgcsteuesrteni slide valve, with the slide in the middle position,

4 shows the sectional view according to FIG. 3 with the slide in a two-way statement "~~ ~~

) In the embodiment according to FIGS. 1 and 2 that is

Valve housing 1 is provided with the associated pressure medium lines 2 to 6, the pressure medium line 3 leading to the first consumer A, the pressure medium line 4 to the pressure medium pump P, the pressure medium line 5 to the second consumer B and the pressure medium lines 2 and 6 to the tank or sump T. The slide 8 provided with the annular control groove 7 is longitudinally adjustable in the central bore of the valve. The slide 8 carries rod-like extensions 9a and 9b on both ends. Press the louvered Stutz discs 10a, 10b, the springs 11a, 11b] \ in turn supported on the wheels 12a and 12b.

f \ The valve shown has electromagnetic

Drive on. For this purpose, the spool hoods 13a and 13b are attached to the ends of the valve housing 1 f, which in all-: |

common with direct current operated magnetic coils 14a jj ;; and 14b, which in turn carry the magnetic cores 15a and,

15b enclose the extensions 9a and 9b of the Act on slide 8.

In the end faces of the two spool hoods 13a and 13b, a lockable screw stop 17a and 17b is screwed in, which with the help of the Kortermut 18a and 18b can be locked in the desired screw position is.

The mode of operation of the valve described is as follows: In the middle position of the slide 8 according to FIG Pig. 1 all pressure medium lines are blocked. When the magnet coil 14a is excited, it exerts a tensile force the magnetic core 15 a, so that the slide 8 in the Drawing is moved to the right until the magnetic core 15b rests against the screw stop 17b. This position is shown in FIG. The pressure medium line 4 coming from the pump connection P is via the annular groove 7 and the pressure medium line 5 is connected to the connection B for the second consumer via the associated control opening. The pressure medium of the first consumer A - or the other consumer side in the case of disc pistons - arrives from connection A via the pressure mixing line 3 through the slotted support disc 1oa through the pressure medium line 2 to the pressure medium line 6 and thereby to the connection T for the sump.

As FIG. 2 shows, in this end position of the slide 8 form due to the travel restriction of this slide the edges of the annular groove 7 of the slide with the edges of the associated control opening in the valve housing 1 between the pressure medium lines 4 and 5 throttle points, which are larger depending on the setting of the screw stop 17b or can be kept smaller. Depending on the setting of the throttle points via the screw stop more or less pressure medium is allowed to pass through to the consumer connection B via the line 5.

The corresponding effect and setting option results from the reverse actuation of the valve, in which the slide 8 is pressed to the left in the drawing by the magnetic coil 14b via the magnetic core 15b will. In this position, the inflow from the pump connection P via the pressure medium line 4 to the pressure medium line 3 and the consumer connection A are set accordingly.

described - 6 - generated therefore self the each- AO Valve That

wells required quantity limitation of the pressure medium for the associated consumer, so that additional components are not required for this quantity limitation.

In the embodiment according to Pig. 3 and 4 of the drawing is a corresponding travel restriction, which is particularly suitable for valves actuated by pressure medium or for pilot-operated slides, but also for the Y-valve design according to Pig. 1 and 2 can be used with advantage. The slide 21 is longitudinally adjustable in the associated central bore of the valve housing 20. The slide 21 is provided with a rod 22 which is guided to the outside through the valve housing and is provided with a thread at its end, onto which the nuts 23 and 24 are screwed as lockable and lockable stops. The spring 26, which holds the slide 21 in its central position, is supported on the cover 25. The pressure medium line 27 leads to Sumpfanschlu ä T and the pressure medium line 28 from the sum pilot spool pressure chamber 29 of the valve.

The mode of operation of this described valve is as follows: In the slide center position shown in FIG. 3 all consumer connections are closed. Now pressure medium from the pilot valve fed through the pressure medium line 28 to the pressure chamber 29, the slide 21 moves according to the drawing left in the position according to FIG. 4. This path of the slide 21 is limited by the nuts 23 and 24, which act as stops on the cover 25. As Fig. 4 r; eigt, form in this so limited end position of the slide 21 the edges of the annular grooves of the slide 21 with the associated Edges of the control openings in the valve housing. The size of these throttling points can be enlarged by adjusting the nuts 23 and 24 accordingly will.

PaUnUnwilt Dipl.-Ing. Horst Röte Dipl.-Ing. Petor Koeel

(Rose)

6609730 H.9.72 ^{EB / each}

Claims (4)

DIPL-ING. HORST ROSE DIPL.-ING. PETER KOSEL PATENTANWÄLTE 3353 Bad Gandersheim, July 13, 1972 Postlacri 129 Hohenhöien 5 Telephone: (05382) 2342 Teiegramm address: Siedpatent BadgandersheUn Gbm Ϊ * 33 988/47 g Our file no. 2468/20 Alfred Pischbach, Ründeroth visual protection claims 1. Multi-way valve for hydraulic systems, in particular for hydraulically driven machines in pressure accumulator operation, with a housing in a housing containing the pressure lines between two end positions adjustable slide, characterized by such a travel restriction (17a, 17b; 23, 24) of the slide (8; 21) that the slide is in its respective end position with the associated control opening or openings of the pressure medium lines (2 to 6) forms a throttle point. 2. Multi-way valve according to claim 1 with an electromagnetic slide drive, characterized by an orer several lockable and lockable stops (17a, 17b, 18a, 18b) for the magnetic cores (15a, 15b) connected to the slide (8), 3. Multi-way valve according to claim 2 with one or more spool hoods arranged on the valve housing for the electromagnets, characterized in that a lockable screw stop (I7a, 17b, 18a, 18b) is screwed into the end face of the coil hoods (13a, 13b) against which the magnetic core (15a, 15b) is in the Schie'oerendstellung front side to limit the travel of the slide. Bank account: Norddeutsche Landesbank, Bad Gandershelm branch, account number 22.118.970 Postal checking account: Hannover 66715 4. Multi-way valve according to claim 1 or 2 and 3, characterized in that the slide (21) or the Magnetic core (15) an outwardly guided rod (22) carries on the adjustable and lockable stops (23,24) can be screwed, which are used to limit the path in the Place the end position of the valve on the outside of the valve body. Patent Attorneys Pipl.-lng. Horst Rose fripl.-lng. Peter Κ · * βΙ (Rose)