DE1583138A1 - Control station for two or more hydraulic control systems with mutual locking - Google Patents

Description

1COOIOQ ^GW Ζ ¹⁸⁷⁵

December 4, 1967 Patent registration (new documents,)

of the company

Westfalia Ironworks Union, 4628 Altlünen

Control station for two or more hydraulic control systems with mutual locking

In the case of hydraulically operated devices, it is often necessary to block one or the other operating device as long as the other is adjustable _o As a practical example, a hydraulic bracing device for mining operations is mentioned, in which the coal is extracted, for example, by a coal plow or other equipment takes place automatically, the conveyor, which serves as a guide element for the planer, in turn is firmly anchored at the ends of the dismantling operation by means of such an anchoring device. In such anchoring devices, there must be an absolute guarantee that not all of the punches causing the tension in relation to the mountains are relieved at the same time. For example, two or even three stamp groups to be controlled separately can be provided. It is customary to effect the absolutely necessary mutual locking by electromagnetic means. However, such a locking device is very complicated and expensive. The invention is based on the object of achieving an absolutely secure mutual locking of the various hydraulic control systems with considerably simpler means using mechanical devices.

m 2 ~

009832/0373

- Gw 1875

- Li / We

- 2 - 4 ₀ December 1967

It is also known to use spring-loaded seat valves in the control of hydraulic control systems, which - Also referred to as preload valves or pressure relief valves - only 'open' at a certain hydraulic pressure. However, these valves have the disadvantage that because the Pressure medium must constantly overcome the spring pressure even when the valve is open, a downstream consumer only one Liquid can be supplied with such a pressure, which is opposite to the pressure prevailing in front of the valve by the spring force is decreased. Use of these known valves presents a significant disadvantage in hydraulic control systems there, there in the arrangement mehreis? Valves in a hydraulic circuit there is a pressure drop from valve to valve.

To eliminate the disadvantages described above and to solve the problem, the invention proposes a common e Use of a mechanical and a hydraulic lock, the mechanical lock being the one and / or Elimination of the operating lever by a known link system in mutual dependency defines and the hydraulic locking through in the control lines of each Consumers switched on, spring-loaded seat valves takes place, the closing body only at a predetermined Pressure opens and in opened. State no longer under pressure the pen stands. The joint use of both the mechanical and the hydraulic locking is therefore necessary, because the mechanical lock can be designed so that the robbery of a stamp is only possible if another stamp is switched to set, but there is no guarantee that this stamp is actually set is. Unless the hydraulic lock according to the invention formed only by a single type of valve, would not exist, could be done by moving it in rapid succession of the gate system a robbery of all stamps can be achieved

«- 3 -009832/0373

Gw 1875 Li / We - J5 - December 4, 1967

Since according to the invention the mechanical locking a pressure, dependent hydraulic locking is assigned, for example, a robbery process cannot be initiated as long as a setting process is not completed.

In an embodiment of the invention, the valve according to the invention can now be realized in such a way that when the valve is open, the spring is supported on a sleeve which is acted upon by the pressure medium and which guides the body and which protrudes with a pin-like extension into a space of low pressure, preferably atmospheric pressure that after opening the seat valve the spring force is at least canceled out by the pressure acting on the sleeve _e This has the particular advantage that the seat valve switched on in the line only opens at a certain pressure on the one hand, and on the other hand no pressure loss in the line after the opening process has taken place behind the valve compared to the pressure in front of the valve. A plurality of seat valves according to the invention can therefore be arranged in a line without a pressure drop occurring from valve to valve.

According to a further feature of the invention, the seat valves arranged in the hydraulic system maintain two or more successive locking positions a subsequent one mechanical switching ineffective until the process initiated by a previous switching of the hydraulic system is executed. If the gate system is moved too quickly, a robbery process cannot be initiated, for example. as long as a previously initiated setting process has not been carried out because the seat valve is responsible for carrying out the robbery process only releases the required pressure when the setting process has been carried out »

009832/0373

Gw Io75 Li / W G - December 4th - 4th, 1967

In a further embodiment of the invention, the link system can advantageously be designed so that the actuating levers of the various switching valves can only be pivoted in parallel planes and the slots reach through in a plate that can only be displaced parallel and perpendicular to the pivoting plane of the actuating lever, the slots extending in the direction of displacement of the There are plate and perpendicular sections and the different sections are distributed on the individual slots so that in each position of the sliding plate, the adjustable actuating lever in the slit sections perpendicular to the direction of displacement of the plate, while the blocked actuating levers are in slot sections which are in the direction of displacement of the Plate run. In this way- in every position of the vaschiebbaren plate is at least blocked, a valve, while the or the other about the same for a whole Verschwenkungshub or only a specific portion pivotable are _e A displacement of the plate is possible only when the movable actuating lever of the valves in a are brought to a very specific position. 3oi> n shifting the plate into the next switching position is another one, namely a switching lever that was adjusted in the previous control process blocked, while the other operating lever or levers are released.

The invention is explained in more detail below on the basis of an exemplary embodiment. The drawing shows with Figs. La, 2a and Yes, the control station for a hydraulic bracing device schematically in three different positions in plan. The Pig. Ib, 2b and Jb show the side view of FIGS. La, 2a and Yes.
Fig. 4 shows the seat valve.

00 983 2/037

GW 1875

- 5 - ^ o December

The outlined steering position is intended for guying with three punch groups a, b, c. Belong to each stamp group two stamps that can carry a guy cap together and that either simultaneously or one after the other each must be controlled in the same sense. That is why there is a special control valve for each of the two stamps intended. The two valves 10 are actuated by the two actuating levers 11a and 11b.

The link system designated by 23 has a second group of dies b, which also consists of two separate, but each in the same direction to be controlled stamps. Controlling the second group b takes place through two control valves 12 with the actuating levers IJa and IJb "

The third stamp group c - again consisting of two stamps to be controlled in the same direction - is controlled by two valves 14 controlled by two separate control levers 15a and 15b,

All six control valves 10, 12 and 14 are installed so that that their operating levers 11, IJ and 15 only in parallel Levels are pivotable. These operating levers 11, IJ and reach through slots of a sliding plate 16, which is guided in two rails 17, which run perpendicular to the plane, in which the operating levers 11, IJ and 15 can be pivoted are. The lateral displacement of the plate 16 may be effected by the lever 18, which can optionally be in three different operating positions can be brought.

The actuating levers 11, IJ and 15 reach through slots 19 the plate 16. These slots 19 are composed of sections 20 which run perpendicular to the slide rails 17,

009832/0373

■■ "■ - Gw 1875

■ Li / We ■ - "6. -. * December 4, 1967

as well as sections 21 which are perpendicular to the pivoting direction the operating levers 11, 13 and I5 run. The slots 19 are designed so that in a certain position the Slotted plate 16, the actuating levers 11 to be blocked in each case are located in a transverse slot section 21. In Fig. La and Ib of the drawing, this is the switch position 1, in which the underside of the associated guy ram is hydraulic may be acted upon, so that these stamps the hanging wall brace against the lying position.

In the same position of the slot plate 16 are the Actuating lever I5 of punch group e in the operating position 3. This group of stamps is relieved of the pressure of the hanging wall, The operating lever I5 can, however, since they are in a transverse direction Slotted section are located from the switch position j5 be brought beyond the middle position 2 into the holding position 1, as in Pig. la is indicated. The stamp group c is thus also clamped between the hanging wall and the lying wall. The operating levers I3 of the third punch group b are located in switching position 2, that is, in the middle position. In the switching position 2 of the actuating lever IjJ is neither one nor the other side of the associated ram from the hydraulic ones Pressure means applied. The stamps b are therefore not clamped between the lying and hanging walls. The operating levers Ij5 could with the sketched shape of the associated slots 22 in the plate 16 can only be brought into switching position j5. the So stamps could only be moved together. A setting "of the stamp b is in the position of the plate sketched in FIG. La not possible. ■

If NaOH setting the stamp c of the die set, a further switching operation is to take place, then the securing plate must first be brought 16 from its position according to "Fig. 1 in the position according to Fig. 2 _e Then the stamp of the stamp group c

009832/0373

Li / We ■ '■ - 7-4 December 1967

secured in set position. The operating lever I5 can do not pivot. The situation is different with the operating levers 11 and 1% The lever 11 can easily out of the switching position 1 can be pivoted into the switching position j5, whereby the stamp the stamp group a retracted and thus from the pressure of the hanging wall be relieved.

Now, if such a move the sliding system could very quickly _$ therefore takes the stamp of Stemp'elgruppe be a already retracted, are when the stamp of the stamp group c not yet set. This is why the. yet to be explained additional use of the seat valve required for the implementation of the invention

The stamp group b, which so far neither on the one nor on on the other side were hydraulically loaded, can either be set or pulled together completely. In Pig. if it is assumed that these stamps will also be set, see above that finally the hanging wall is supported by the two punch groups c and b.

After the operating levers 11 and 15 in the Pig. 2 outlined Have been pivoted in a manner, the securing plate 16 in the position after Pig. 3 can be moved. Then the operating levers take hold 11 and 15 in the transverse slot parts. You are locked with it. A pivoting of these operating levers is not possible. The most important thing is that the Lever I5 are secured in switch position 1, so that the Stamp group b supports the hanging wall. Well one could Relief of the stamp group c take place, in turn by the Seat valves must ensure that the retraction of the punch group c cannot take place as long as the stamp groups a or ■ b are not set with full load. The discharge of the stamp group c takes place by pulling the actuating lever I5 out of the

■ ■ - 8 -

009832/0373

- Gw 1875

Li / We - December 8 - December 4, 1967

position 1 can be pivoted into the switching division 3 »So that the stamp group 3 is relieved of the pressure of the hanging wall. The ■ associated sole and / or cap rails can be advanced will. The same applies to the rails of stamp group a “Then the stamps of group c can then be used again immediately be set by the operating lever I5 a from the Position 3 can be swiveled back into switching position 1. Once this has happened, the locking plate 16 can be actuated of the three-position lever 18 can be brought back into its central position according to FIG. 2, and so on.

The shape and arrangement of the slots in the lock plate can be arbitrary depending on the design of the hydraulic Systems. In addition, the securing plate 16 could still be in a certain position, e.g. B. by a it perpendicular penetrating thorn can be determined if during a very specific control phase and only in this one Phase any other switching process was carried out or omitted must become.

The seat valve 30 has a seat 36 with a slit body 3I. A sleeve 33 is supported on the collar 37 of the closing body. When the valve is open, that is, when the closing body 3I is lifted from the seat 36, the pressure fluid flows from the space 38 into the space 39 * and reaches the space 41 ^{via the bores 40 and 40 1.}

Since both the spring 32 and the closing body 3I on all sides are washed around by the pressure medium, a hydraulic one arises here State of equilibrium a * The peg-shaped extension 34 of the But sleeve 33 causes the sleeve 33 by the pressure medium seen against the spring action in the plane of the drawing is moved up. This means practically that at the moment of opening.

- 9 0098 3 2/0373

Gw 1875 ■ Li / We .. 9 - 4 »December 1967

the spring pressure is fully compensated, so that the same pressure prevails in the space 42, which leads to further consumers as in room 58.

€ 09832/0373

Claims (3)

i-10875 ', Li / We * λ December 4th, 1967 Claims Control station for two or more hydraulic control systems with mutual locking, marked by sharing a mechanical and a hydraulic lock, the mechanical lock activating and / or deactivating the operating lever (1.1, 13 * 15) determined by a known gate system (23) in mutual dependence and the Hydraulic locking through spring-loaded seat valves connected to the control lines of the individual consumers (30) takes place, the closing body (j51) only opens at a predetermined pressure and is no longer under the pressure of the spring (32) in the open state. 2. Control station according to claim 1, characterized that the spring (32) is acted upon by the pressure medium when the seat valve (30) is open, the Closing body leading sleeve (33) is supported with a lower peg-like extension (3 ^) into a space (35) Pressure, preferably atmospheric pressure, protrudes in such a way that, after the seat valve has opened, the spring force through the acting on the sleeve pressure is at least canceled. 3. Control station according to claim 1 and 2, characterized in that by the hydraulic System arranged seat valves (30) with two afer more successive Locking positions (Fig. La, 2a, 3a) a subsequent mechanical shift remains inoperative, until the process initiated by a previous circuit has been carried out by the hydraulic system. 009832/0373 GW 18.75 A4 ^Li / ^We - I - Λ, December 1967 4c control station according to claim 1 and / or one or more the previous one, marked thereby e t that the operating levers (11, IJ, 15) of the various Switching valves (10, 12, 14) can only be pivoted in parallel planes and slots (19 * 22) in one only parallel and perpendicular to the pivot plane of the operating lever slidable plate (16) reach through, the slots from in Versehieberichtung the plate and perpendicular to this extending sections (20, 21) exist and the various sections are distributed at the individual slots are that in every position of the sliding plate the adjustable operating lever in perpendicular to the Versehieberichtung the plate lying slot sections (20,), the blocked actuating levers, however, in slot sections (21 ■), which run in the direction of the slab. Q0 9832/0373