DE102017205419A1 - valve unit - Google Patents

Abstract

A valve unit (1) is proposed, which has a plurality of valves (5) combined to form an assembly, which are connected in parallel with each other to a common fluid distribution channel (33, 33a) communicating with a supply connection (34) for supply with a working fluid to be controlled , A pressure regulator (46), which is connected between the supply connection (34) and the fluid distribution channel (33, 33a), permits a uniform pressure regulation of the fluid pressure prevailing in the fluid distribution channel (33, 33a) with which the valves (5) are fed

Description

The invention relates to a valve unit, comprising a plurality of combined into a module valves, which are connected to supply one of them to be controlled working fluid parallel to each other to a common, communicating with a supply port Fluidverteilkanal, and with Druckeinstellmitteln, by the height of a secondary pressure of the immediate deviating from a primary pressure of the working fluid fed to the supply connection is adjustable in the valves fed to the valves.

One from the DE 102 48 319 B4 known valve unit of this type has a penetrated by a Fluidverteilkanal base on which are mounted with the interposition of its own pressure control device a plurality of valves which are able to forward a supplied to them from the Fluidverteilkanal working fluid in a controlled manner to a connected consumer. By means of the pressure control devices, the fluid pressure of the working fluid fed into the valves can be adjusted to a secondary pressure which deviates from a primary pressure under which the working fluid fed into the fluid distribution channel via a supply port is located. Such a equipped valve unit allows very variable controls connected consumers, however, is associated with a high design effort and accordingly high production costs.

The invention has for its object to provide cost-effective measures to be able to supply consumers connected to a valve unit with standing under a variable fluid pressure working fluid.

To achieve this object, it is provided in a valve unit having the features mentioned above that the pressure adjustment means are formed by a pressure regulator connected in the valve unit between the supply connection and the fluid distribution channel, which enables uniform pressure regulation of the fluid pressure prevailing in the fluid distribution channel to the secondary pressure.

In this way, a central pressure control of all connected to the Fluidverteilkanal valves is possible. The fluid distribution channel, also referred to as a regulated fluid distribution channel, for better distinction, is preceded by a pressure regulating device that regulates the working fluid fed into the regulated fluid distribution channel to a secondary pressure which differs from a primary pressure, below which the pressure regulating means the working connection is fed to the supply connection. Thus, all connected to the regulated Fluidverteilkanal valves can be supplied with standing under a same secondary pressure working fluid. This simplifies the fluidic control of multiple existing consumers that are to be operated with the same but variable fluid pressure. The cost of constructive implementation is relatively low, because a single pressure regulator is assigned to a plurality of valves simultaneously. The integration of the pressure regulator in the valve unit allows for easy handling, since when installing the valve unit at the place of use of the integrated pressure regulator is automatically installed and unnecessary in this respect separate installation measures.

Advantageous developments of the invention will become apparent from the dependent claims.

The valve unit may have the regulated fluid distribution channel as the only fluid distribution channel communicating with valves. The number of valves connected to the regulated Fluidverteilkanal valves of the valve unit is in principle arbitrary.

In an advantageous embodiment of the valve unit of the pressure regulator is switched on in the course of a valve unit passing through the feed channel and divides this feed channel into two feed channel sections, each communicating with a plurality of valves in fluidic parallel connection. One of these two feed channel sections forms the fluid distribution channel which is regulated to the secondary pressure, while the other feed channel section forms a further fluid distribution channel connected to the supply channel. In this case, the fluid pressure prevailing in the further fluid channel represents a primary pressure with which the valves connected to the further fluid distribution channel are fed and from which the secondary pressure prevailing in the regulated fluid distribution channel is generated by means of the pressure regulator. The further fluid distribution channel, which is under the primary pressure, is expediently an uncontrolled fluid distribution channel which is fed directly from the supply connection with working fluid under the primary pressure without pressure control measures.

One and the same valve unit may also have at least one unregulated further fluid distribution channel formed completely separate from the regulated fluid distribution channel. It is also possible to equip one and the same valve unit with a plurality of regulated Fluidverteilkanälen be connected to the independently to be supplied with working fluid valves of the valve unit. In this case, it is possible to provide different secondary pressures for supplying valves within one and the same valve unit at the same time.

Preferably, each fluid distribution channel is formed in a fluid distributor of the valve unit, which can be equipped or equipped with the valves communicating with it. The valves are arranged side by side in a Aufreihungsrichtung, which is in particular a longitudinal direction of the valve unit. In principle, the valves can be integrated in the fluid distributor. Preferred is an embodiment in which the valves are mounted or mounted on the outside of a mounting surface of the fluid distributor, in particular in a detachable manner.

One and the same valve unit may have only one fluid distributor equipped with valves or may have a plurality of fluid distributors each equipped with valves. If the valve unit contains a plurality of fluid distributors, the pressure regulator can be incorporated as an independent pressure control module between two fluid distributors arranged successively in the line-up direction, wherein an unregulated fluid distribution channel is formed in one of the fluid distributor and a fluid distribution channel regulated to the secondary pressure is formed in a further fluid distributor.

Conveniently, in the line-up direction next to one of the valves, a pressure adjusting means of the pressure regulator is arranged, by the actuation of which the secondary pressure can be preset manually as required. Such pressure adjusting means may be placed between valves arranged sequentially in the line-up direction. For example, the pressure adjusting means is formed by an adjusting screw or a knob.

The fluid distributor can be constructed in one piece and carry all its associated valves. Deviating from this, a particularly advantageous embodiment provides for a modular construction of the fluid distributor, so that the fluid distributor has a plurality of fluid distribution modules connected to one another in the line-up direction of the valves and interconnected by suitable fastening measures, which can be equipped or equipped with at least one of the valves. In a modular fluid distributor, one or more fluid distribution modules can also be designed for fitting with a plurality of valves.

The components required for the formation of the pressure regulator can be integrated into a fluid distributor fitted with or fitted with valves. In a different advantageous embodiment of the pressure regulator is integrated as an independent pressure control module in the valve unit. The pressure control module is mounted in particular in the line-up direction of the valves to at least one fluid distributor. If the valve unit is equipped with a plurality of fluid distributors, the pressure regulating module expediently sits in the line-up direction of the valves between two fluid distributors, so that it is flanked on opposite sides by these two fluid distributors. Conveniently, the pressure control module is supplied in this case from the one fluid distributor with standing under a primary pressure working fluid, which it delivers in the context of a pressure control under a secondary pressure in the other fluid distributor into it.

The pressure control module is expediently equipped with a regulator housing which has a primary connection and a secondary connection. To the primary port is supplied under the primary pressure working fluid which is fed to a supply port which may be formed directly on the regulator housing or is part of another component of the valve unit and communicates with the primary port of the regulator housing. For example, the valve unit may have at least one end face with respect to the pressure control module separate connection module, which is equipped with the supply connection.

The pressure regulator expediently has a control channel, which is connected on the one hand to the supply connection and on the other hand to the fluid distribution channel regulated to the secondary pressure. In the course of the control channel, a pressure control valve member is turned on, which can specify the flow cross section and thus the fluid passage through the control channel through variable to influence the secondary pressure. The position of the pressure-regulating valve member can be predetermined by a differential force of the pressure regulator, which results on the one hand from the secondary pressure and on the other hand from an oppositely acting, expediently variably predefinable control force. The control force can be predetermined in particular by means of a spring device which can be variably adjusted with respect to its pretension. For variable adjustment of the spring preload is advantageously already mentioned above, manually operable Druckeinstellmittel.

The pressure regulator is expediently equipped with a suitable for detecting the secondary pressure pressure detection device, which is also able to display the detected secondary pressure. The pressure detection device is in particular a pressure gauge. By means of the pressure gauge, the secondary pressure can be visualized and thus very easily monitored.

Each valve expediently communicates with at least one working channel, which leads to a connection means arranged on the outside of the valve unit, to which a fluid line leading to a consumer to be actuated is connectable. Preferably, two such working channels are associated with each valve. The connection means of all working channels are expediently placed on one and the same outside of the valve unit, wherein the pressure detection device of the pressure regulator is expediently also located on this outside. Alternatively, the pressure detection device may also be arranged, for example, in extension of a fitting surface of a fluid distributor equipped with valves.

The valves are suitably of electrically operated type. They are in particular electromagnetically or piezoelectrically actuated. These are preferably electro-fluidly piloted valves, in particular with a 5/2-functionality or a 5/3-functionality. The electric actuation of the valves is preferably carried out by means of an integrated into the valve unit, the valve unit expediently in the line-up direction of the valves passing through communication strand, which is able to transmit electrical actuation signals. The communication string can also enforce the pressure regulator, in particular when the pressure regulator is arranged between two fluid distributors, which are equipped with valves, are electrically controlled by means of the communication string.

• 1 eine isometrische Darstellung einer bevorzugten ersten Ausführungsform der erfindungsgemäßen Ventileinheit, die mit nur einem einzigen Fluidverteilkanal ausgestattet ist, der als auf einen Sekundärdruck geregelter Fluidkanal ausgebildet ist,
• 2 eine Draufsicht von oben der Ventileinheit aus 1 mit Blickrichtung gemäß Pfeil II aus 1,
• 3 einen Längsschnitt durch die Ventileinheit gemäß Schnittlinie III-III aus 2 und 4, wobei ein strichpunktiert umrahmter Bereich zusätzlich als separate Ausschnittsvergrößerung abgebildet ist,
• 4 einen Querschnitt der Ventileinheit gemäß Schnittlinie IV-IV aus 3 im Bereich des Druckreglers, wobei die Schnittdarstellung auch einem Querschnitt gemäß Schnittlinie IV-IV des in 7 illustrierten Ausführungsbeispiels entspricht,
• 5 eine weitere Ausführungsform der Ventileinheit in einer isometrischen Darstellung, die intern mit zwei Fluidverteilkanälen ausgestattet ist, von denen der eine als ein ungeregelter und der andere als ein geregelter Fluidverteilkanal ausgebildet ist,
• 6 eine Draufsicht von oben der Ventileinheit aus 5 mit Blickrichtung gemäß Pfeil VI aus 5, und
• 7 einen Längsschnitt der Ventileinheit gemäß 5 und 6 gemäß Schnittlinie VII-VII aus 6.

The invention will be explained in more detail with reference to the accompanying drawings. In this show:

• 1 an isometric view of a preferred first embodiment of the valve unit according to the invention, which is equipped with only a single Fluidverteilkanal formed as a regulated to a secondary pressure fluid channel,
• 2 a top view of the valve unit 1 looking in the direction indicated by arrow II 1 .
• 3 a longitudinal section through the valve unit according to section line III-III 2 and 4 , wherein a dash-dot framed area is additionally shown as a separate enlargement,
• 4 a cross section of the valve unit according to section line IV-IV 3 in the region of the pressure regulator, wherein the sectional view is also a cross section along section line IV-IV of the in 7 corresponds to the illustrated embodiment,
• 5 a further embodiment of the valve unit in an isometric view, which is internally equipped with two Fluidverteilkanälen, one of which is designed as an unregulated and the other as a regulated Fluidverteilkanal
• 6 a top view of the valve unit 5 looking in the direction indicated by arrow VI 5 , and
• 7 a longitudinal section of the valve unit according to 5 and 6 according to section line VII-VII 6 ,

In the drawing, two embodiments of a total reference numeral 1 Mentioned valve unit according to the invention shown, the fluidic control of consumers 2 is formed, one of which is indicated schematically. At the consumers 2 These are, in particular, drives that can be actuated by fluid power, for example linear drives or rotary drives. Every consumer 2 is by means of at least one fluid line 3 , For example, a fluid hose to the valve unit 1 connected.

With the help of the valve unit 1 It is possible, a pressurized working fluid to the at least one connected consumer 2 and by this consumer 2 also attributed again. In this way, for example, an output member 4 of the consumer 2 be driven to a reciprocating working movement.

The working fluid is preferably compressed air. Alternatively, the working fluid may be another gaseous or liquid pressure medium.

In the valve unit 1 are several valves 5 combined into an assembly. Overall, the valve unit 1 as a single component manageable.

The valves 5 are preferably of an electrically actuated design. Every valve 5 has an electrically actuated valve drive 6 in the embodiment consists of one or two electrically actuated pilot valves, which are in particular solenoid valves or piezo valves. Every valve drive 6 is with electrical connection means 7 equipped with which he can receive the required electrical actuation signals for his operation.

Every valve 5 has one through the valve drive 6 according to double arrow 8th switchable between different switching positions valve member 12 , Exemplary is the valve member 12 Switchable by means of fluid power, the him by the valve drive 6 can be imposed. In this respect, every valve is 5 preferably an electrofluidic pilot-operated valve. However, it is also possible a design in which the valve member 12 through the valve drive 6 directly, for example, is electromagnetically switchable.

The valve member 12 , which is preferably a valve spool, is located in one in a valve housing 13 of the relevant valve 5 trained valve chamber 14 , In the valve chamber 14 open in the direction of change 8th spaced locations a plurality of valve channels 15 one that holds the valve body 13 enforce and on the other hand to an outer base 16 of the valve housing 13 lead out.

The valve channels 15 exemplify an input channel 15a , two output channels 15b . 15c and two discharge channels 15d . 15e , Depending on the switching position of the valve member 12 are the valve channels 15 connected in a different pattern. As an example, the valve member 12 assume two switch positions in which it is the input channel 15a with either one or the other output channel 15b . 15c connects and simultaneously the output channel not connected to the input channel 15b . 15c with one of the discharge channels 15d . 15e combines.

The valves 5 are in groups on a fluid distributor 17 the valve unit 1 assembled. In the embodiment of the 1 to 3 all valves are seated 5 the valve unit 1 on one and the same fluid distributor 17 , the only fluid distributor of the valve unit 1 is. The in the 5 to 7 illustrated valve unit 1 has at least two and preferably exactly two fluid distributors 17 , on each of which a separate valve group consisting of several valves 5 is mounted. Every fluid distributor 17 has a placement area 18 on which the associated valves with the base area 16 its valve housing 13 are mounted. By fasteners 22 , in particular fastening screws, are the valves 5 individually on the assigned fluid distributor 17 attached.

The valves 5 are in a direction indicated by a double arrow Aufreihungsrichtung 23 strung together and in this line-up direction 23 arranged side by side. The valve unit 1 has a longitudinal axis 24 , with the axial direction of the Aufreihungsrichtung 23 expediently coincides.

Every valve 5 has a longitudinal axis 25 and is particularly mounted so that this longitudinal axis 25 perpendicular to the longitudinal axis 24 the valve unit 1 is aligned.

Every fluid distributor 17 is interspersed by several fluid channels, in a specific association with the valve channels 15 the valves 5 are connected. These fluid channels open into the 2 and 6 indicated channel mouths 26 to the assembly area 18 out, so that they are at the bottom 16 located openings of the valve channels 15 to be able to communicate.

To these in the fluid distributor 17 running fluid channels belong per valve 5 two in the drawing partly schematically indicated working channels 27 , on the one hand, with the output channels 15b . 15c are connected and on the other hand in each case to an outside of the valve unit 1 arranged connection means 28 lead to one of the consumer 2 leading fluid lines 3 is connectable. The connection means 28 are designed for example as plug connectors. Every valve 5 are two working channels 27 individually assigned.

The valve unit 1 has a right angle to the longitudinal axis 25 oriented outside 32 , which in the following for better distinction also as a connection outside 32 is designated and on the outside of the respective associated fluid distributor 17 the connection means 28 are arranged. As a result, all connection means are easily accessible 28 on one and the same connection outside 32 the valve unit 1 ,

Using the connection means 28 can be connected to the valve unit 1 several consumers 2 be connected, by appropriate electrical control of the associated valve 5 independently operable by fluid power.

Every fluid distributor 17 is also of one in the line-up direction 23 extending fluid distribution channel 33 interspersed, the fluidic with a supply connection 34 is connected to the one under a primary pressure P1 standing working fluid in the valve unit 1 can be fed. The working fluid is provided by a pressure source (not shown). The supply connection 34 expediently has a connection means 35 on, to which a connection to the pressure source producing, not further shown fluid line can be connected.

The fluid distribution channel 33 pervades the fluid distributor 17 in the longitudinal direction and flows through branch channels at the corresponding channel mouths 26 several times to the assembly area 18 off, so he connects to the input channel 15a each at the assembly area 18 mounted valve 5 is in fluid communication. At least thoughtfully is the assembly area 18 in several in the line-up direction 23 Subdivided placement places, on each of which one of the valves 5 and to which in addition to two working channels 27 the fluid distribution channel 33 each ends. Thus, every valve 5 from the fluid distribution channel connected to it 33 be supplied with working fluid. The valves 5 are input side in fluidic parallel connection to the associated Fluidverteilkanal 33 connected.

To each of the above-mentioned mounting positions of the mounting surface 18 lead through corresponding channel mouths 26 in addition, two each in the line-up direction 23 through the fluid distribution channel 33 extending through discharge channels 36 . 37 each with a communicating with the atmosphere, accessible from the outside discharge opening 36a . 37a are connected. The canal mouths 26 the discharge channels 36 . 37 each with one of the discharge channels 15d . 15e of the mounted on the assigned placement place valve 5 in fluid communication. Thus, with appropriate switching position of the valve member 12 from a consumer 2 backflowing working fluid through the discharge channels 36 . 37 be discharged through to a pressure sink, in particular to the atmosphere.

Every discharge opening 36a . 37a can also be a connection means 35 be assigned to which a fluid line can be connected to the discharged working fluid from the valve unit 1 divert.

The supply connection 34 and the two discharge openings 36a . 37a are expediently on a connection module 38 arranged, which is the valve unit 1 terminates at one of its two axial ends.

At the axially opposite end portion of the valve unit 1 is expediently an electronic control module 42 that with a the valve unit 1 in their interior in the alignment direction 23 passing through electromechanical communication strand 43 is coupled. The communication strand 43 interspersed every fluid distributor 17 and preferably also the pressure regulator 46 for what purpose these components of a communication channel 44 designated channel are interspersed, in which the communication strand 43 extends.

The communication strand 43 stands with the valve actuators 6 in electrical connection, which is realized in particular by the fact that the fluid distributor 17 in the area of each placement space over one or more openings 50 on the one hand in the communication channel 44 and on the other hand to the assembly area 18 lead out and in the above-mentioned electrical connection means 7 the valve drives 6 for electrical contacting with the communication string 43 can intervene.

Starting from the electronic control module 42 get the valves 5 over the communication thread 43 electrical actuation signals for specifying their respective operating state. About the communication thread 43 can also from the valves 5 originating feedback signals to the electronic control module 42 to be led back.

At the electronic control module 42 is expediently an electrical interface device 45 , which is a control-technical communication of the electronic control module 42 with an external electronic control device allows. The electronic control module 42 may include or form a bus station.

In the embodiment of the 1 to 4 is the only Fluidverteilkanal here 33 to the secondary side of one in the valve unit 1 integrated pressure regulator 46 connected. The pressure regulator 46 is able to regulate working fluid supplied to it on the primary side, which is under a primary pressure P1, to a secondary pressure P2, and working fluid, which is at secondary pressure P2, to the secondary side into said fluid distribution channel 33 output, so that the working fluid therein is below the secondary pressure P2. This acted upon by the secondary pressure P2 Fluidverteilkanal 33 be for better distinction as a regulated Fluidverteilkanal 33a designated.

In the embodiment of the 1 to 4 is the primary side of the pressure regulator 46 without another Fluidverteilkanal 33 to the supply connection 34 connected to the operation of the valve unit 1 under the primary pressure P1 standing working fluid in the valve unit 1 is fed.

In the in the 5 to 7 illustrated embodiment is the pressure regulator 46 in the alignment direction 23 between the two existing fluid distributors 17 switched on, the Fluidverteilkanal 33 of the secondary side of the pressure regulator 46 subsequent fluid distributor 17 a secondary fluid pressure P2 controlled fluid distribution channel 33a forms. By contrast, the Fluidverteilkanal 33 the primary side of the pressure regulator 46 upstream fluid distributor 17 as an unregulated Fluidverteilkanal 33b formed, the upstream without the interposition of a pressure regulator with the supply connection 34 communicated.

In operation of in 5 to 7 illustrated valve unit 1 to the supply connection 34 fed, under a primary pressure P1 standing working fluid is thus unregulated and under the primary pressure P1 standing out of the unregulated Fluidverteilkanal 33b to the at the unregulated Fluidverteilkanal 33b enforced fluid distributor 17 mounted valves 5 issued. In addition, however, a part of in the unregulated Fluidverteilkanal 33b fed working fluids through the subsequent pressure regulator 46 passed through which the working fluid is adjusted to a secondary pressure P2, which is in particular lower than the primary pressure P1. This under the secondary pressure P2 standing working fluid is then from the regulated Fluidverteilkanal 33a out in those valves 5 introduced at the of the regulated Fluidverteilkanal 33a enforced fluid distributor 17 are mounted.

In all cases, by the on board the valve unit 1 located pressure regulator 46 a deviating from the primary pressure P1 and in this respect in particular lower secondary pressure P2 in a controlled manner adjustable, so that the plurality of valves 5 connected to the regulated fluid distribution channel 33a is connected, a central inflow-side pressure control of the working fluid experiences. One can thus connect to these valves 5 connected consumers operate at an operating pressure of the supply pressure of the valve unit 1 differs introduced media.

The two regulated and unregulated Fluidverteilkanäle 33a . 33b can also be used as consecutive feed duct sections 47a . 47b one the valve unit 1 passing through the feed channel 47 interpreted at one end with the supply connection 34 is connected and in the course of which the pressure regulator 46 is turned on.

The pressure regulator 46 is suitably as a respect to the at least one fluid distributor 17 separate, standalone module running as a pressure control module 46a is designated. This pressure control module 46a is in the lineup direction 23 the valves 5 on or into the valve unit 1 integrated fluid distributor 17 grown.

Both embodiments have in common that the pressure control module 46a primary side one in the alignment direction 23 oriented first cultivated area 48 and on the secondary side with respect to the first growing area 48 oppositely oriented second acreage 49 features. Conveniently, the pressure regulator 46 with a regulator housing 52 equipped, which are the moving components of the pressure regulator 46 carries and on which the two acreage 48 . 49 are formed.

In the embodiment of the 1 to 4 is the pressure control module 46a directly between the connection module 38 and that of the regulated fluid distribution channel 33a enforced fluid distributor 17 incorporated. It lies with its first acreage 48 at one on the connection module 38 trained first mating surface 54 at and with its second acreage 49 at a front side on the fluid distributor 17 trained second mating surface 55 , One at the first acreage 48 outgoing primary connection 56 of the pressure control module 46a communicates with the opposite at the first mating surface 54 trained mouth of a connection module 38 enforcing and with the supply connection 34 connected connection channel 53 , One to the second acreage 49 outgoing secondary connection 57 of the pressure control module 46a communicates with one at the second opposing surface 55 located channel mouth of the regulated Fluidverteilkanals 33a ,

From the circumstances explained above, the embodiment differs from the 5 to 7 in that the first mating surface 54 not on the connection module 38 is formed, but the front side of the unregulated Fluidverteilkanal 33b interspersed further fluid distributor 17 , The connection module 38 is here at the first mating acreage 54 opposite end of the unregulated Fluidverteilkanal 33b enforced fluid distributor 17 stated.

An unillustrated embodiment differs from that of FIG 1 to 4 in that the supply connection 34 directly on the pressure regulator module 46 and in particular to the controller housing 52 is formed so that the primary connection 56 and the supply connection 34 coincide. In such an embodiment, the connection module 38 and the pressure control module 46a executed as a structural unit. This saves a separate connection module 38 ,

The regulator housing 52 of the pressure control module 46a is from a control channel 58 interspersed between the primary connection 56 and the secondary connection 57 extends. In the course of the control channel 58 there is an overflow opening 61 coming from a valve seat 62 framed, the one for better distinction as a pressure control valve member 63 opposite valve member is opposite. By spring means 64 is the pressure regulating valve member 63 in one on the valve seat 62 adjoining and the overflow opening 61 characterized occlusive closed position biased. At the pressure regulating valve member 63 lies with respect to the spring means 64 opposite direction of action a push rod 65 on, with respect to the controller housing 52 movable partition member 66 is attached, which is a pressure tapping chamber 67 under seal from a control chamber 68 separates. The partition wall member 66 is a piston in the embodiment, but may for example also be at least partially designed as a membrane. The pressure tap chamber 67 communicates directly or via a pressure tap channel 70 constantly with the secondary connection 57 , so that in her constantly the secondary pressure P2 is applied. This results in the partition wall member 66 including the pushrod 65 acting secondary pressure force from the pressure regulating valve member 63 is directed away.

In the control chamber 68 there is a spring device 69 extending between the regulator housing and the divider member 66 supported and on the partition wall member 66 including the pushrod 65 exerts a control force which is opposite to the secondary pressure force. The control force is by varying the bias of the spring means 69 changeable specifiable.

To the bias of the spring device 69 to be able to change comfortably, is between the spring device 69 and the regulator housing 52 a manually operable pressure adjusting means 73 incorporated, which is in particular one of outside of the pressure regulator 46 Her operable adjusting screw is.

The desired level of the secondary pressure P2 is adjustable by appropriate specification of the control force. Because the secondary pressure across the pressure tap chamber 67 on the partition wall member 66 acts, its axial position depends on the differential force between the control force and the secondary pressure force. Lies during operation of the valve unit 1 the current secondary pressure below the targeted secondary pressure P2, outweighs a differential force that the pushrod 65 against the pressure regulating valve member 63 presses and selbiges releasing the overflow 61 from the valve seat 62 takes off. As a result, the secondary pressure increases and the pressure regulating valve member 63 moves back towards the closed position. If the current secondary pressure exceeds the desired secondary pressure, the pushrod raises 65 from the pressure regulating valve member 63 off, so that the pushrod 65 penetrating venting channel 74 is released, which is an outflow of working fluid from the secondary port 57 allowed to the atmosphere, so that the secondary pressure drops again. In this interplay, the secondary pressure P2 regulates to the desired, predetermined by the control force secondary pressure P2.

The spring device 69 and the pressure adjusting means 73 belong to a pressure adjustment unit 75 of the pressure regulator 46 , This is in particular arranged so that the pressure adjustment 73 from an upper side of the valve unit 1 is accessible for actuation, this top is the side that the assembly area 18 of the fluid distributor 17 is facing.

Preferably, the regulator housing 52 a base section 52a , whose outline - in the axial direction of the longitudinal axis 24 considered - at least substantially the outline of the adjacent fluid distributor 17 equivalent. The base section 52a thus has an upper end surface 76 that are at least substantially in the same plane as the respective adjacent placement surface 18 lies. The pressure adjustment unit 52 surmounts this upper end surface 76 so that the associated Druckeinstellmittel 73 preferably in the alignment direction 23 next to one of the valves 5 is arranged.

The regulator housing 52 expediently also has a lid section 52b , the control chamber 68 encloses and a part of Druckeinstelleinheit 75 is. He is in the area of the upper termination area 76 at the base section 52a of the controller housing 52 attached. The pressure adjusting means 73 is adjustable on the lid section 52b held.

The pressure regulator 46 is preferably with a pressure detection device 77 equipped, which is able to detect the secondary pressure P2 and in the area of the valve unit 1 also display. Exemplary is such a pressure detection device 77 formed by a pressure gauge. The pressure detection device 77 stands with the pressure tap chamber 67 or another area of the pressure regulator 46 , in which the secondary pressure prevails, for example via a in the controller housing 52 trained pressure tap channel 80 in fluid communication.

Conveniently, the pressure detection device 77 also on the connection outside 32 the valve unit 1 arranged so that the connection of the fluid lines 3 and reading the pressure detection device 77 can be done comfortably from one and the same side.

Especially when electrically actuated valves 5 the valve unit 1 on both sides of the pressure regulator 46 are arranged, has the regulator housing 52 via an axially continuous opening 78 through which the communication strand 43 extends through. The opening 78 here forms a length of the communication channel 44 ,

Every fluid distributor 17 is expediently modular and consists of several in the Aufreihungsrichtung 23 attached fluid distribution modules 79 together. The valve units illustrated in the drawing 1 have such a structure. Each fluid distribution module 79 defines at least one placement space of the assembly area 18 and contains the working channels 27 for the valves sitting on it 5 , The fluid distribution channel 33 and each discharge channel 36 . 37 consist of aligned openings of the juxtaposed fluid distribution modules 79 together.

In one non-illustrated embodiment, at least one fluid distributor 17 formed in one piece and carries all its associated valves 5 , The modularity has the advantage that the overall length of the valve unit 1 and the equipment volume with valves 5 are variable selectable.

QUOTES INCLUDE IN THE DESCRIPTION

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Cited patent literature

• DE 10248319 B4 [0002]

Claims (16)

A valve unit comprising a plurality of valves (5) combined into a subassembly connected in parallel with each other to a common fluid distribution channel (33, 33a) communicating with a supply port (34) for supplying a working fluid to be controlled therewith, and pressure adjusting means in that the height of a secondary pressure (P2) of the working fluid fed directly into the valves (5) can be set differently from a primary pressure (P1) of the working fluid fed to the supply port (34), characterized in that the pressure adjusting means are actuated by one in the valve unit (1) between the supply port (34) and the Fluidverteilkanal (33, 33a) switched pressure regulator (46) are formed, which allows a uniform pressure control in the Fluidverteilkanal (33, 33a) prevailing fluid pressure to the secondary pressure (P2) Valve unit after Claim 1 , characterized in that the pressure regulator (46) in the course of the valve unit (1) passing through feed channel (47) is turned on and this feed channel (47) into two feed channel sections (47a, 47b) divided, each with a plurality of valves (5) in fluid communication with one another, wherein one of the two feed channel sections (47a) forms the fluid distribution channel (33, 33a) regulated by the secondary pressure (P2) and the other feed channel section (47b) forms a further fluid distribution channel (33, 33b) connected to the supply connection (34). forms. Valve unit after Claim 2 , characterized in that between the supply port (34) and the pressure regulator (46) extending further Fluidverteilkanal (33, 33b) forms an unregulated Fluidverteilkanal (33, 33b), in which in operation of the valve unit (1) under the primary pressure ( P1) standing working fluid flows. Valve unit according to one of Claims 1 to 3 , characterized in that each Fluidverteilkanal (33, 33a, 33b) in a fluid distributor (17) of the valve unit (1) is formed, which can be equipped with the communicating with him valves (5) or equipped, said valves (5) in a Aufreihungsrichtung (23) are arranged side by side. Valve unit after Claim 4 , characterized in that the valves (5) on the outside of a mounting surface (18) of the fluid distributor (17) are mounted or mounted. Valve unit after Claim 5 , characterized in that in the line-up direction (23) next to one of the valves (5) for the variable specification of the secondary pressure (P2) manually operable Druckeinstellmittel (73) of the pressure regulator (46) is arranged. Valve unit according to one of Claims 4 to 6 , characterized in that the fluid distributor (17) is modular and has a plurality of in the line-up direction (23) of the valves (5) juxtaposed fluid distribution modules (79) which are each equipped with at least one of the valves (5) or equipped. Valve unit according to one of Claims 1 to 7 , characterized in that the pressure regulator (46) as an independent pressure control module (46) in the valve unit (1) is integrated. Valve unit after Claim 8 in conjunction with one of Claims 1 to 7 , characterized in that the pressure regulating module (46a) is mounted in the line-up direction (23) of the valves (5) to at least one fluid distributor (17). Valve unit after Claim 9 characterized in that the pressure control module (46a) is incorporated in the line-up direction (23) of the valves (5) between two fluid manifolds (17) and flanked on opposite sides by these two fluid manifolds (17). Valve unit according to one of Claims 8 to 10 , characterized in that the pressure regulating module (46a) has a regulator housing (52) which has a primary connection (56) connected directly to the supply connection (34) or directly to the supply connection (34) and to the regulated fluid distribution channel (33, 33a). Having a neighboring fluid distributor (17) connected to the secondary terminal (57). Valve unit according to one of Claims 1 to 11 , characterized in that the pressure regulator (46) has a control channel (58) which is connected on the one hand to the supply port (34) and on the other hand to the secondary pressure (P2) regulated Fluidverteilkanal (33, 33a) and in the course of a Fluid passage-controlling pressure control valve member (63) is turned on, the position of which can be predetermined by a differential force which results on the one hand from the secondary pressure (P2) and on the other hand from an oppositely acting, suitably variably predeterminable control force. Valve unit after Claim 12 , characterized in that the pressure regulator (46) has a Druckeinstelleinheit (75) for adjusting the secondary pressure (P2), which has a control force causing the spring means (69) whose bias is variably adjustable. Valve unit according to one of Claims 1 to 13 , characterized in that the pressure regulator (46) is equipped with a secondary pressure (P2) detecting and indicating pressure detecting means (77), in particular with a pressure gauge. Valve unit according to one of Claims 1 to 14 , characterized in that each valve (5) communicates with at least one working channel (27) which leads to a connection means (28) arranged on the outside of the valve unit (1), to which a fluid line leading to a consumer (2) to be actuated ( 3) can be connected, wherein the connection means (28) of all working channels (27) and the pressure detecting means (77) of the pressure regulator (46) on the same outer side (32) of the valve unit (1) are arranged. Valve unit according to one of Claims 1 to 15 , characterized in that the valves (5) are of electrically actuated type, wherein conveniently in the valve unit (1) integrated and connected to the valves (5) communication strand (43) for transmitting electrical actuating signals to the valves (5) is present , which can expediently enforce the pressure regulator (46).

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