CONTROL VALVE

Republic of Austria patent office (11) number: 383,407 B (12) PATENT SPECIFICATION (21) registration number: 6166/80 (22) registration day: 17.12.1980 (42) beginning of the patent duration: 15.11.1986 (45) expenditure day: 10. 7,1987 (51) Int.Cl.

F16K 11/20 F15B 13/08 (30) priority: 9. 1,1980 DE 3000592 stresses. (56) Holding out: GB-PS1068867 US-PS3820568 (of 73) patentees: WELFARE MEIER & WINE FLAX FACTORY FOR OIL GMBH & CO KG MUNICH (DE).

(54) CONTROL VALVE CO CD Mi 0078MB - 2 Nr.383407 the invention a control valve concerns in the generic term of the patent claim 1 indicated art. in an older DE-OS 2904034 a control valve of this kind is suggested, with which in a control position of the piston slide and in the neutral position over the piston slide a continuous connection is made between the return connections, so that in a control valve arrangement from several set control valves the medium can divert battery-like together unhindered over a return channel. So that in the other control position of the piston slide the return river is not interrupted, the housing of each control valve in the control valve arrangement exhibits a transverse channel, which interconnects the two return channels of this housing, so that diverting working medium is rerouted to the continuous in each case return channel. If such a control valve for only one consumer is conceived, so that it exhibits only one return channel, then this return channel is interrupted in a control position, so that the total flow through the return valve of the control valve arrangement is interrupted then. With two existing return channels this connecting crosswise drilling is to be attached in additional work procedures and necessarily inappropriate place in Housing. In addition an inappropriate downstream and - arise to detour, and are in the position, in which the return, only the half throughput is rerouted possible, which in a battery of control valves with if necessary large return quantity is unwanted. In the US-A-3,820,568 during a control valve arrangement increased final sections of the slidegate valve drillings are shown, which form chambers, which are interconnected within the housing. These increased final sections form those for return channel-divide, which must have a certain distance of it from the consumer connections separated its and from seals reasons. There is thus measures in the housing intended, which for the connection the return channel-cuts off between the slidegate valve drillings ensures. Resulted from it that the valve housing becomes relatively large, particularly in longitudinal direction of the slidegate valve drilling. The most serious disadvantage is however that the ends of the piston slide cannot be subjected with pressure, like it, e.g., during a printing control of the slidegate valve movement is necessary. The GB-A-1,068,867 concerns an older design of a control valve arrangement, with which within 30 of the housings of the valve blocks a multiplicity of connected channels is intended, which are intended to the tank only for the return. Within the piston slides no additional flow paths are trained, which could ensure that in both control positions and in the neutral position of each piston slide between the individual return channel-cut a flow connection off exists.

The invention is the basis the task, with a control valve of the initially specified To provide kind with manufacture-technically simple and compactly arranged housing in all control positions of the piston slide for a continuous return. The task posed is solved according to invention by the characteristics indicated in the characteristic part of the patent claim 1.

“Only more is entrusted 0 the housing with the task, rückströ with this training to away-transmit mende working medium to the slidegate valve drilling and from this. The piston slide however is alone responsible to interconnect in all to its possible control positions the return connections in the slidegate valve drilling so that the working medium can flow off unhindered, without to be rerouted. The housing does not need unfavorable “and place-robbing cross hole between the return channels. Also with only one consumer connection in all three control positions of the piston slide the passage is kept open by the return channel. A long return flow path with detours is avoided. A short slidegate valve overall length and compact and simple housing training are reached. 50Eine appropriate execution form comes out from requirement 2. Due to this transfer of the connections from the level of the consumer supply out can overlap itself at the piston slide to appropriate measures in piston slide longitudinal direction, without the danger is given by argument crossing of a range in the others. Favorable way results - 3 - to Nr.383407 from it besides an optimally short piston slide length. A further, preferential execution form also around 90° opposite the return connections transferred consumer connection comes out from requirement 3. This training is manufacture-technically particularly simple. The argument in the return system experiences besides only small Umlen-5 kungen. Flow resistances are small also with high operating pressures. A further, appropriate execution form of the invention comes out from requirement 4. Also flow bags can be attached manufacture-technically simply. They can be im übrigen similarly the flow bags, which for the supply of the consumer connections intended by the pump inlet is opening. Even if the flow bags of the supply and the flow bags for the return system overlap each other in piston slide longitudinal direction, still another reliable sealing effect between these ranges exists, since the flow bags lie angletransferred in circumferential direction of the piston slide to each other. From requirement 5 still another appropriate type of the invention lets itself infer. Hiebei is so limited pivoting that she already provides in two control positions of the Kolbenschie bers for the run of the return channel. The additional through-hole or the bag open to pivoting can be realised manufacture-technically simply. In the latter case then pivoting becomes responsible for the argument guidance in all three positions of the piston slide. Finally a favourable execution variant of the invention from requirement 7 ago proceeds. Despite an extraordinarily briefly building piston slide a connection of the return connections is ensured in all control positions. The flow path is limited however at present by the slidegate valve drilling and their sealing. Execution forms of the invention are below described on the basis the designs. Show: Fig.l an axial section by a control valve for a consumer, Fig.2, around 90° turned cutaway view of the control valve of Fig.l, Fig.3 a cross section through einö control valve arrangement with control valves in accordance with the Fig.l and 2, in the level III III of Fig.2, Fig.4 a side view of a further execution form of a piston slide, Fig.5 the piston slide of Fig.4 in, a cut opinion turned around 90° opposite Fig.4, Fig.6 a further execution form of a piston slide, Fig. 7 a further execution form of a piston slide, Fig.8 a profile by a further execution form of a control valve, Fig.9 one around 90° turned cutaway view of the control valve of Fig.8 in a control valve arrangement with two control valves, Fig. 10 a part of a cutaway view of a further execution form of a control valve. In Fig.l and 2 two profiles are shown by a control valve - 1 - with a housing - 2 -, which is combined in Fig.3 with a control valve - 1 - the same kind in a control valve arrangement. In a slidegate valve drilling - 3 - a piston slide - 4 - of generally cylindrical form from the neutral position shown in two control positions is adjustable - A and B. A pump connection - p is supplied arguments, which for one to a consumer connection - attached consumer is certain v. The pumping 40 connection faces the consumer connection - v diametrically, whereby these are to each other transferred in slidegate valve drilling longitudinal direction. In the neutral position of the piston slide - 4 - a flow path is in form of a t-shaped drilling by the piston slide - 4 - intended in longitudinal direction around the piston slide stroke from the neutral position into one of the control positions shifts. The drilling section - 5 - runs around 90° angletransferred in relation to the 45 level of the pump connection and the consumer connection - v and leads from the top side of the piston slide - 4 - to its lower surface. A port - 8 - is intended to the through-hole - 5 - at height of the consumer connection - v. The housing becomes likewise perpendicular to the level of the consumer connection - v and the pump connection - p of a return channel - R intersperses, which by the slidegate valve drilling into two sections under 50 brochen is. In the slidegate valve drilling - 3 - two diametrically facing return connections are formed by it. In the neutral position shown the passage of the return channel - R by a through-hole - is manufactured 6 - in the piston slide - 4 -. Around the piston slide stroke opposite the through-hole - 6 - transferred the Kolbenschie __4Nr.383407 intersperses more ber a further through-hole - 7, which in the control position - B of the piston slide the passage of the return channel manufactures. Before the pump connection - p is in the piston slide -4 - a lengthwise-running flow bag - 9 - trained, which diametrically a further flow bag -9 - faces. The flow bags -9 - channels become by connecting - 10 - argument-transferring connected. In Fig.3 two control valves - 1 - are in such a manner joined together that its return channels - R swore and to a return collecting tank area - lead u, which is at the exterior of the second control valve - 1 -. In each control position of the piston slide is one of the three through-holes - 5.6 or 7 - in adjustment with the two return connections - R. The beginning of the return kan'als - R in the upper control valve - locked 1 - is appropriately by a plug - S. In this way it is guaranteed that arguments from the consumer connection __V in Fig. 3 upper control valve then in the Rücklaufsammeiraum - 11 - to flow off can, if the piston slide - 4 - of the upper control valve - 1 - is in its control position __A, u.zw independently of in which position the piston slide - 4 - of the control valve lower in Fig.3 is. Additional evasion channels around the slidegate valve drillings are not necessary for the return the system. In the Fig.4 and 5 a further execution form of a piston slide - 12 - is shown, which in place of the piston slide -4 - in the Fig.l to 3 is applicable. This possesses again over through-holes -10 - connected flow bags - 9 - as well as one T-förmi towards flow path -5,8, with which in the control position - A of the piston slide -12-der consumer connection - v with the return ports - R is connectable. For the passage of the return in the two other positions of the piston slide flow bags - 16 - are trained, likewise in longitudinal direction of the piston slide - 12 - run around 90° to the flow bags - 9 - shift. In the longitudinal extending the flow bags - 16 - is appropriate the flow path - for 5,8. With a further execution form of a piston slide - 14 - in accordance with Fig. 6 becomes the flow path, which is responsible to A of the piston slide - 14 - for the connection of the consumer connection - v with the return channel __r the control position -, of a circulating pivoting -17 - in an educated manner, some Breite-19-besitzt, which in for instance the clearance of the consumer connection - v or the return the connection - R corresponds. Into this pivoting leading into, and in longitudinal direction of the piston slide -14 - running flow bags - 18 - provide for a passage of the return in the two further positions of the piston slide - 14. A piston slide - 15 - in accordance with Fig.7 exhibits cheranschlusses with the return connection a pivoting - 20 - as flow path for connecting the Verbrau-35, whose width - 22 - corresponds approximately to the double clearance of the consumer connection - v or the return connection - R. Pivoting - 20 - manufactures the passage in the return in the neutral position of the piston slide -15 - and in the control position - A. For the control position - B ensure lengthwise-lying, short flow bags - 21 - for an unhindered passage^{40 of the} return. In the Fig.8 and 9 a control valve - 13 - in the profile is represented, which is combined in accordance with Fig.9 with a control valve the same kind to a control valve arrangement - 23 -. In the housing - 24 - of the control valve - 13 - a slidegate valve drilling - 25 - for trained in way not described more near a piston slide - 26 -, secured against twist, is. “A pump connection - p serves for the supply of consumer connections - 27 and 28 - for two consumers who can be subjected mutually - VI and VII -. For this purpose the flow bags - 9 - with the through-holes - 10 -, described above, are trained in the piston slide - 26 - in the piston slide - 26 -. One between the through-holes __10 running and perpendicularly to it arranged drilling - 29 - does not serve for the so-called 50 pressure-free run with that to deal more in greater detail here is. From Fig.9 it is recognizable that the housings - 24 - of the two control valves with continuous drillings - D are equipped, which in the represented neutral position of the piston slide - 26 - for the pressure-free run into a Sammelkammer -30 - at the lower surface of the control valve last in the control valve arrangement - 5 - Nr.383407 - 23 - lead. The consumer connections - 27 and 28 - are appropriate for the pump connection - p diametrically opposite and are in each case in longitudinal direction of the slidegate valve drilling - 25 - in addition shifts. In the outer circumference of the piston slide - 26 - is each consumer connection - 27 and 28 - 5 a recess - 31 - assigned, over. a pressure balance channel - 32 - with an appropriate recess - 33 -, is connected to the recess - 34 -, open in the housing one for slidegate valve drilling - 25 -, belongs. In the neutral position shown of the piston slide - 26 - a pressure balance for arguments lining up in the consumer connection - 27 and/or 28 - results in this way, by which the piston slide is relieved by Klemmkräften. Perpendicularly to the level, in which the pump connection and the consumer connections - 27 and 28 - are, one through-hole each intersperses the piston slide - 26 - - 35. As flow path for the connection of each consumer connection - 27 - with a return channel - R, whose return connections itself diametrically oppositely in the slidegate valve drilling - 25 - find, serves a circulating pivoting - 36 - in the piston slide. Since the return of ports - R opposite the consumer connections - is transferred 27 and/or 28 - around a measure - S, which correspond at the most to half of the sum of the clearances of both connections, pivoting is extended by rounded projections - 37 - slightly, which carry ensuring in the represented neutral position that in each housing the return channel sections, which are by the slidegate valve drilling - 25 - from each other separated, by pivoting - 36 - are unhindered connected. The through-hole - 35 - is around the length of a piston slide stroke between the neutral position and a control position opposite the projection - 37-- shifted, so that again the return connections - R are connected, if the piston slide - to 26 - is shifted into a control position, in which a consumer connection - 27 or 28 - with the return one connects. Due to the angle transfer between the level, in which the pump connection - p and the consumer connections - 28 and 27 - find, and the level of the pressure-free run and the return system lets itself an optimally short overall length of the piston slide - 26 - and naturally also the housing - 24 - the control valves - 13 - to reach itself. The housings can be developed compactly and space-saving, since neither evasion channels nor cross connection channels between the return channels are necessary, but the piston slide - 26 - in each case independently for an unhindered passage of the return ensures. The return channels flow after into Fig. 9 lower control valve - 13 - into the common Sammelkammer - 30 -. To place of the through-holes - 35 - flow bags also lengthwise-running can be attached, which extend up to pivoting - 36 - and which passage between the return channels - R keep open, if the piston slide is shifted into its control positions. A such execution form would correspond in for instance in Fig.7 for admission only one consumer connection. In Fig.10 a part of a control valve - 40 - is shown on average, in whose slidegate valve drilling - 42 - a piston slide - 41 - is led. The slidegate valve drilling - 42 - is locked by 40 a cover - 43 -, by which sealed a twist lock and an actuator - 44 - are led out from the control valve. Return channel sections - R intersperse the control valve - 40, from which the one into one by a cover - 45 - limited Sammelkammer - 46 - flows. Also - 47 - end of the piston slide - 41 - marked limited together with the drilling wall and the cover - 43 - a return chamber - 48, 45 their size depending upon the position of the piston slide change. Concomitantly in the control position, in which the end - 47 - of the cover - 43 - is neighbouring, which return channel sections - R remain connected, is two itself diametrically facing lengthwise-running flow bags - 16 ', 18 ' - in the piston slide - 41 - formed, e.g. milled, which permit then the free passage of the argument. PATENT CLAIMS: 501. Control valve from at least two joined together control valves existing _ 6 - Nr.383407 control valve arrangement, with a housing interspersed by a smoothly going through slidegate valve drilling and, a non rotating piston slide, with a pump connection and at least a diametrically facing and in drilling longitudinal direction shifted consumer connection, adjustable from a neutral position in two control positions, with two the brewing cheranschluß the assigned and to each other return connections into the slidegate valve drilling, transferred in circumferential direction in approximately the radial level of the consumer connection, which the housing belong to interspersing return channel, and with two channels, from which in a control position the first channel the consumer connection with the return connections as well as this separated from the pump connection det with one another verb in, planned in the piston slide, during the second channel in the neutral position those It interconnects return connections, by the fact characterized that in the piston slide (4,12,14,15,26) a third channel (7.16.18.21, 35) is trained, which flows into an axially limited extent range of the piston slide, with this during its adjustment movement of a control position a (A) over the neutral position into the other control position (B) the return of connections (R) over-driven, and which in the other control position (B) of the piston slide the return connections (R) interconnects. 2. Control valve according to requirement 1, by the fact characterized that the return connections (R) of the return channel in drilling longitudinal direction for the consumer connection (V) around a measure of (s) to those the pump connection (P) turned away side of the consumer connection (V I, V II) transferred are, those at the most half of the sum of the light widths of the consumer connection (V I, V II) and a return connection (R) amounts to. 3. Control valve according to requirement 1, whereby the consumer connection is transferred opposite the return connections by 90°, thereby characterized that the first channel (5,8) in the piston slide (4) t-shaped is trained, and that on both sides the first channel (5,8) the second and third channels (6,7) are trained as through-holes. 4. Control valve after one of the requirements 1 to 3, by characterized that the second and third channels (16,18) are formed for 6,8) cutting flow bags by in piston slide longitudinal direction running and the first channel (in the piston slide extent. 5. Control valve after one of the requirements 1 to 4, by it characterized that a um-30 forms current pivoting (20) to the piston slide extent the summarized first and second channels, and that the third channel either a through-hole beabstandete with the piston slide stroke between the neutral position and each control position of pivoting (20) by the piston slide is or is formed by the piston slide stroke bridging and into pivoting (20) ignoring flow bags (21) to the piston slide extent.

(Hiezu 3 sheet designs) pressure: Ing.E.Voytjech, Vienna AUSTRIAN PATENT OFFICE Ausgegeben1987 07 10 3 sheet - Bl.l patent specification No. 383,407 Int.Clf: F 16 K 11/20 F 15B13/08 Fig.1 9 10 7 6 9 10 21 igZ^ 15 Fig.1 9 10 7 6 9 10 21 igZ^ 15 V/tÜ 22^/20 AUSTRIAN PATENT OFFICE Ausgegeben1987 07 10 3 sheet - Bl.2 patent specification No. 383,407 Int.Cl?: F 16 K 11/20 F 15 B 13/08 Fig. 8 33 10 9 29 35ÖSTERREICHISCHES PATENT OFFICE Ausgegeben1987 07 10 3 sheet - El.3 patent specification No. 383,407 Int.Clf: F 16 K 11/20 F 15 B 13/08 Fig. 10 left 48 44 42 4318 ' 41 16 '