DE102015016357B4 - Control valve of a process plant - Google Patents

Abstract

Control valve (1) for adjusting a process fluid flow of a chemical or petrochemical plant, a plant for processing food fluids, such as a brewery, or a power plant, such as a nuclear power plant, comprising a control valve housing (7) which defines the position of a stationary valve seat (25). , a valve member (31) which cooperates with the valve seat (25) to open and close the control valve (1), and a bearing for translationally guiding the valve member (31) relative to the valve seat (25) in the control direction (S), wherein this bearing additionally permits a rotational movement of the valve member (31) relative to the valve seat (25), an electric motor (5) or an electric generator (5) being coupled to the valve member (31) in such a way that a rotational drive force between the valve member (31) and the electric generator or electric motor (5), the electric motor (5) being coupled to the valve member (31) in order to drive the valve member (31) to implement a pump function, or the valve member (31) being connected to the electric generator (5 ) is connected in order to convert a rotational movement of the valve member (31) induced by the fluid flow into electrical energy in the electric generator (5), characterized in that a hollow actuating rod (51) is provided which is attached to the valve member (31) in an axial , translational adjusting direction (S) is coupled to drive, so that a linear movement of the adjusting rod (51) leads to a linear movement of the valve member (31), wherein an output shaft (41) arranged in the adjusting rod (51) is also provided, which is connected to the valve member (31) is connected in a rotationally fixed manner, with a rotary bearing being provided between the actuating rod (51) and the output shaft (41), and that a coil arrangement (43) of the electric motor (5) or electric generator (5) is mounted in a rotationally fixed and axially displaceable manner The control rod (51) is attached outside the control valve housing (7), the coil arrangement (43) being moved back and forth with it in accordance with the control movement, and that the valve member (31) is mounted on an output shaft (41) which is rotatably mounted relative to the valve housing (7). is attached, which is divided into two parts, with a valve member-side output shaft part carrying the valve member (31) and the further, outside output shaft part carrying a permanent magnet arrangement (45).

Description

The invention is in the field of process engineering systems with which thermally and/or chemically aggressive fluids are processed. Fluids with temperatures well below 100°C are processed in cooling processes, whereby substances that are hazardous to the environment and health have to be treated in chemical or petrochemical process technology. When handling such fluids, there are special production regulations to be observed, such as standardized ignition safety. In process engineering systems for processing food fluids, such as in breweries, dairies or the like, there are certain production requirements for the control valve, in particular with regard to its sealing function, emergency closing function and compliance with hygiene regulations, etc.

The invention relates to a control valve, such as a lifting valve, for adjusting a process fluid flow in the process plant. The control valve has a valve seat fixed to the housing and a valve member usually designed as a valve cone. The valve member is attached to a valve rod or valve stem, which may be operated by a pneumatic, electric or hydraulic drive, for adjustment in a translational direction of movement of the control valve. In the process engineering system, hydraulic and pneumatic drives are preferred insofar as they have a lower risk of ignition than electric drives. Furthermore, it is necessary that the drive side, for example the pneumatics or hydraulics, is and remains hermetically sealed from the process fluid side in every setting position of the control valve, even if a large number of setting movements are to be undertaken during the operating time of the process engineering system.

Modern control valves can be subject to a control circuit that is electrically operated. For this purpose, the control valve according to the invention can also be operationally coupled to a nearby, in particular directly flanged, in particular electropneumatic positioner, which can emit a corresponding, auxiliary-powered control signal to an actuator coupled to the control valve, for example via auxiliary energy, such as pneumatics or hydraulics. It is desirable that the electrical components of the lifting valve arrangement, in particular of the position control system, are not only powered by a central energy supply, but only receive an energy supply at specific operating points. A decentralized energy supply has the disadvantage that, due to ignition protection requirements, it is not easy to keep a self-sufficient energy supply in stock for the valve areas.

It is known to provide local energy generation cells in process technology for energy self-sufficient energy generation, and a pneumatic or hydraulic source can be used as the energy source, for example. It is also known to generate electrical energy from the process fluid flow as such.

Out of DE 196 01 917 A1 an arrangement for the power supply of electrical devices by means of pneumatic auxiliary energy is known. This arrangement should be integrated into a control device for decentralized energy supply. In order to achieve sufficient long-term operational safety while reducing the generation of noise and with the greatest possible freedom from maintenance, a piston/cylinder arrangement which is self-reversing via a spring and has a piston which is movably arranged in a stationary cylinder is provided. The piston/cylinder assembly is connected to a source of pneumatic energy with the spring positioned between a piston rod mounted on the piston/cylinder assembly and a stationary piezo element. With the translational back and forth movement initiated by the pneumatics, electrical energy is generated at the connections of the auxiliary element and tapped off in order to supply the electrical devices with energy.

DE 20 2012 010 675 U1 discloses an energy converter that converts auxiliary pneumatic energy for a positioner into electrical energy by introducing a pressure pulse in a working chamber in which a reciprocating working piston is arranged. With the help of a magnetic restoring force, a reciprocating movement is imposed on the piston, which carries a permanent magnet, which in turn interacts with a coil to generate electric current.

Furthermore disclosed DE 10 2012 002 316 A1 a thermoelectric element in the housing interior of a control valve, which uses the pressure difference and temperature difference to generate electrical energy for transmission to electrical consumers.

Such decentralized energy generation devices require precise assembly and a larger number of components. Furthermore, a translational reciprocating movement is associated, for example, with a non-negligible functional susceptibility, in particular when different pneumatic flows act on the piston to different extents.

A control valve with an energy generation device is known from WO 2014/132 187 A2. In this case, the energy conversion device is arranged downstream of a closure element in the form of a radial closure slide in the direction of flow. This arrangement of an energy conversion device in the area of the control valve requires a great deal of assembly effort due to the large number of parts and also has a strong influence on the flow of process fluid, so that use of the known arrangement is not suitable for a large number of process engineering situations.

US 2009/0 165 866 A1 discloses a ball valve in which a turbine is arranged inside the ball valve member and is rotatably mounted relative to the ball valve member. This arrangement is also susceptible to damage and contributes to a significant influencing of the process flow through the turbine within the through-channel of the control valve, so that extensive use in the field of process technology is not possible.

U.S. 3,779,514 A discloses a control valve and controlled process system.

DE 29 43 238 A1 discloses a valve capable of reducing an existing supply pressure to a required working pressure.

U.S. 2,192,452 A discloses a self-wiping throttle valve.

DE 32 42 947 C2 relates to a double-seat valve with two valve disks which can be brought into an open and closed position independently of one another and/or together.

DE 29 41 240 A1 relates to an internal combustion engine with at least one cylinder fixed to the machine, a piston that can be displaced in the cylinder and works on a crankshaft, which piston delimits a combustion chamber together with the cylinder, an inlet valve and one on the outlet valve for the combustion chamber and an exhaust gas turbine.

DE 100 38 575 A1 relates to a translationally operating actuating device with an electromagnetic drive, which can essentially be switched back and forth between two axial positions.

The object of the invention is to provide a decentralized energy supply for electrical devices in the vicinity of a control valve, in which case the flow characteristics of the control valve can remain unaffected as far as possible, in particular the flow flow can be adjusted independently of the controlled position of the control valve, without the maintenance effort for the control valve and/or or increase the probability of failure.

This object is solved by the features of claim 1 and/or claim 2. Preferred embodiments are specified in the dependent claims.

According to this, a control valve, in particular a lift valve, is provided, preferably for the linear setting, in particular raising and lowering, of a valve member in order to adjust a process fluid flow of the process plant, as defined above. The process plant includes a chemical or petrochemical plant, a plant for processing food fluids, such as a brewery, or a power plant, such as a nuclear power plant. The control valve according to the invention comprises a valve housing which defines the position of a stationary valve seat. In particular, to fix the valve seat in the interior of the channel passage of the control valve, an inner rib can be provided, which delimits an in particular circular passage opening, which can represent the base of the valve seat. It is known to form the valve seat by inserting a separate sealing seat, in particular from a material that is different from the valve housing. Furthermore, the control valve according to the invention has a valve member that interacts with the valve seat to open and close the control valve, wherein in particular the valve member can be moved towards and away from the valve seat, in particular can be raised or lifted in the vertical direction. The valve member can have a rotationally symmetrical shape, such as a cone shape or a truncated cone shape, in which case, in particular, an axis of rotational symmetry of the valve member can coincide with a linear actuating movement axis of the valve member. The particularly rotationally symmetrical valve member interacts with the likewise rotationally symmetrical valve seat in order to form a closed, circumferential, particularly circular or cylindrical sealing surface engagement in the closed state. The valve member forms the adjustable valve body of the control valve, which cooperates with the stationary valve seat to open and close the control valve. Furthermore, a bearing, in particular an axial plain bearing, is provided for guiding the valve member in particular in a translatory, linear manner relative to the valve seat. This bearing for the valve member with respect to the valve seat and consequently with respect to the valve housing can also be designed to prevent process fluid from escaping from the valve housing or the entry of a medium foreign to the process fluid into the valve housing. According to the invention, this particular linear bearing also has the ability to allow the valve member to rotate relative to the valve seat, particularly about the actuating movement axis of the control valve, so that, in addition to guiding the valve member in an axial control direction, a rotary movement of the valve member about the control direction axis is also permitted.

The invention preferably relates to a control valve, in particular a lift control valve, which comprises a control valve housing which defines a stationary valve seat through which the process fluid can flow, in particular as already specified above. Furthermore, the control valve according to the invention has a valve member which can be moved, in particular in a translatory manner, in particular in accordance with the regulation, relative to the valve seat for opening and closing the control valve. In addition, the valve member has a sealing surface around which the process fluid flows on the outside, at least when the control valve is open, and which cooperates with the valve seat in order to essentially hermetically seal the valve passage when the valve member is closed. According to the invention, the valve member has a turbine blade profile on its, in particular conical, outside around which the process fluid flows, in particular offset in the direction of flow with respect to the sealing surface. In addition, the valve member is movably mounted relative to the valve housing in such a way that the process fluid flowing past the active surface entrains the valve member, which is in particular freely rotatable, and causes it to rotate. The "open or unclosed" valve member is free to rotate within the control valve body and is exposed to the flow of fluid that causes the pivoted valve member to rotate. The valve member that can be driven in rotation from the outside (independently of the fluid flow) can also influence the fluid flow--independently of the respective position of the valve member along the axis of the actuating direction. With the valve member being able to rotate freely with respect to the control valve housing, the flow behavior can be influenced, in particular downstream of the valve seat. For example, by introducing external rotary forces into the valve member, which are communicated to the valve member from the outside, a pumping effect can be achieved at the control valve passage, which can cause an additional control valve-specific influencing, in particular strengthening or weakening, of the process fluid flow.

In particular, the valve member can be coupled indirectly via an output shaft to a braking device, for example an electric generator, in order, for example, to stop the valve member from rotating about the adjustment direction axis shortly before the control valve closes, i.e. the valve member engages with the valve seat, so that sliding friction between the valve member and the valve seat and thus increased wear between the two components is avoided. In particular, the turbine blade profile can achieve a throttling of the fluid flow, in particular independently of the respective valve position, up to the sealing of the closure. The rotational movement of the valve member caused by the process fluid flow and in particular an output shaft connected to the valve member can be used to convert flow energy of the process fluid flow into another energy, such as electrical energy, even pneumatic energy on the output shaft side, in particular outside the control valve housing. Appropriate energy converters, which convert the kinematic rotational energy of the valve member into electrical energy or pneumatic energy, are known per se. An energy store, such as an accumulator, can be assigned to the respective energy converter, which stores the converted energy and can release it again depending on the operating situation.

In a preferred embodiment of the invention, the control valve comprises a control rod, which is in particular coupled to a control drive, such as a pneumatic control drive, in order to transmit a control force for executing the translational or linear control movement to the valve member. In particular, the actuating force is generated outside the valve housing in the above-mentioned actuating drive and communicated to the actuating rod. The actuating rod protrudes into the valve housing and is rigidly coupled to the valve member in such a way that the process fluid flow forces acting on the valve member, in particular on the turbine blade profile, are introduced into the actuating rod for transmission further to the outside of the valve housing or vice versa, that are generated outside of the valve housing Actuating forces and rotational driving forces for operating the valve member can be transmitted into the actuator rod. Alternatively, the valve member can be rotatably mounted in the actuating rod responsible for the movement along the actuating direction, so that a rotational movement of the valve member can be implemented relative to an actuating rod that is rigidly mounted in the direction of rotation about the actuating direction axis. In this case of a rotatable mounting of the valve member relative to an actuating rod that is stationary in the direction of rotation, an additional output shaft is provided, to which the valve member is attached and which is rotatably mounted, in particular, on or in the actuating rod. For this purpose, the actuating rod can be designed as a hollow tube in which the output shaft is rotatably mounted. It is clear that the output shaft can be designed as a hollow shaft, in which the actuating rod can be guided in the axial actuating direction.

In a further development of the invention, the valve member of the control valve is rotatably mounted on a valve rod, which transmits the control movement in the control direction. The rotary bearing of the valve member with respect to the actuator rod, which is stationary in the direction of rotation, is designed to translate the valve member into both to take along the right directions. Alternatively, the valve member can be rigidly attached to a valve rod, with a valve rod displacement allowing both a translational valve adjustment movement and a rotational movement, in order to be able to assume any position relative to the valve seat in the adjustment direction on the one hand and to allow the rotational movement around the axis of the adjustment direction on the other.

In a preferred embodiment of the invention, the valve member comprises a cone shape, in particular a truncated cone shape. The valve member can have a conical, in particular truncated cone shape, at least in the open state of the control valve on the outer active surface around which process fluid flows, on which a turbine blade profile and a circumferential sealing area without turbine blade profile are formed in sections. The turbine blade profile is used either as a pump part to influence the process fluid flow by means of a rotational movement imposed from outside or to be driven passively by the process fluid flow, with the resulting kinetic rotational energy being able to be transmitted to the outside via the output shaft. The control valve sealing area is preferably shaped like a segment of a cone or cylindrical. The sealing area is designed to form a full-circumferential sealing engagement with the valve seat of the control valve, in particular when the valve member is closed, with the turbine blade profile section of the outer effective surface in the process fluid flow direction being arranged upstream of the sealing area of the valve member without a turbine blade profile.

In the invention, a hollow control rod, in particular a hollow tube, is provided as the control rod, which is coupled to the valve member in an axial, translational control direction so that a linear movement of the control rod leads to a linear movement of the valve member. According to the invention, an output shaft is provided, which is assigned in particular concentrically to the actuating rod and is non-rotatably connected to the valve member, so that the output shaft can transmit a rotational movement of the valve member and vice versa. To realize the rotational movement of the output shaft relative to the actuating rod, a rotary bearing is provided between the actuating rod and the output shaft, for example by means of one or more roller bearings.

Preferably, the actuator rod is attached to a chamber divider of a pneumatic actuator having at least one pneumatic working chamber and one return chamber. A chamber divider may be a diaphragm and plate assembly movably mounted in the actuator housing. The actuator housing and the valve housing are preferably flanged together in order to require a small construction volume. In addition, the actuator housing and the control valve housing have housing passages that are essentially aligned with one another for the passage of the control rod and, if applicable, the output shaft.

In a further development of the invention, the valve housing has a valve housing passage, which is in particular coaxial with the valve seat and/or diametrically opposite the valve seat, for leading through the valve rod and, if necessary, the output shaft to the outside of the valve housing. The actuating rod is preferably designed as a bearing sleeve in the valve housing passage and/or the actuator housing passage, which is arranged in the valve housing passage and/or the drive housing passage to form an axial plain bearing. The bearing sleeve preferably accommodates at least one rotary bearing, such as a roller bearing, on its inside for guiding the rotational movement of the output shaft against the bearing sleeve.

In one embodiment of the invention, the valve member is fastened to an output shaft which is mounted in a translatory manner relative to the valve housing and is supported in particular on a hollow actuating rod. The output shaft is preferably divided in two, with an output shaft part on the valve member side carrying the valve member, in particular at the end, and the other output shaft part on the outside carrying a permanent magnet arrangement. Both driven parts are rotationally mounted in such a way that they can rotate independently of one another. Both output shaft parts are supported on the inside of the hollow actuating rod. In this case, an output shaft part coupling can be provided for the mutual rotary entrainment of the output shaft parts. Preferably, the coupling should be contactless, in particular realized by a magnetic coupling, with the actuating rod receiving the output shaft parts in a rotatory manner, in particular, comprising two blind hole compartments separated by an inner wall, in which the respective output shaft part is rotatably mounted, but not displaceable in the setting direction relative to the blind hole compartment is.

In the case of the invention, an electric motor is provided which is coupled to the valve member in such a way that the valve member can be driven to implement a pump function. Alternatively, the valve member can be connected to an electric generator in such a way that a rotational movement of the valve member induced by the fluid flow in the Electric generator can be converted into electrical energy.

In the invention, a coil arrangement of the electric motor or electric generator is attached to a non-rotatable and axially displaceable actuator rod, in particular outside the control valve housing and preferably inside a return chamber of a pneumatic actuator. The coil arrangement is moved back and forth in accordance with the adjustment movement. A permanent magnet arrangement is preferably rotatably attached to an output shaft firmly connected to the valve member in relation to the coils, which allows a common translational adjustment movement of the coil of the electric motor or the electric generator and the permanent magnet arrangement as well as a relative rotational movement between the coil and the magnet arrangement. In this way, a pump function or a generator function is always provided, regardless of the setting position.

In a further development of the invention, an electric motor or an electric generator, which interacts with a magnet arrangement non-rotatably coupled to the valve member, is arranged outside the valve housing, in particular in an actuator housing, such as a pneumatic actuator housing, in particular in its pneumatic working chamber or reset chamber. The electric motor or electric generator is preferably arranged fixed to the housing in relation to an output shaft which is coupled in a torque-proof manner to the valve member and in particular in relation to a translatory, axially supported actuating rod. The magnet arrangement can, in particular on an output shaft, have such an axial longitudinal extent in the actuating direction that a coil of the electric motor or electric generator is in electromagnetic engagement with the magnet arrangement over the entire actuating path of the control valve, so that a pump function or a generator function is permitted and guaranteed independently of the control valve position is. The longitudinal extent of the magnet arrangement is preferably at least equal to the maximum control amplitude of the control valve.

Furthermore, the invention relates to a method for generating electrical energy and/or for influencing the process fluid flow individually for a control valve in the area of a control valve passage of a control valve, in particular for achieving an additional pumping effect compared to the process fluid flow in the area of the control valve passage, such as the valve seat. The method is designed in such a way that it can proceed in accordance with the above-mentioned mode of operation of the control valve. The rotatably mounted valve member of the control valve is set into a rotational movement, in particular about its axis of control movement, by the flow of process fluid and/or by rotational forces introduced from the outside, which is transmitted from the outside to the valve member and/or from the valve member to the outside of the valve housing. On the outside of the control valve, the rotary movement can be converted into electrical energy by means of an electric motor and, if necessary, fed to an electrical energy store. When a rotary movement is applied from the outside, the rotary movement is transmitted to the rotatably mounted valve member in order to influence the process fluid flow in the area of the valve seat to reach. For this purpose, the valve member can be provided with a turbine structure on the outside around which the flow occurs.

It is clear that the method according to the invention can be specified according to the functional and method steps mentioned above and/or later.

• 1 eine Querschnittsansicht des erfindungsgemäßen Stellventils in einer Hubventilausgestaltung in einer offenen Ventilstellung;
• 2 eine Querschnittsansicht gemäß 1, wobei das Stellventil in einer geschlossenen Ventilstellung ist;
• 3 eine Querschnittsansicht einer weiteren erfindungsgemäßen Ausführung des Stellventils; und
• 4 eine Querschnittsansicht einer noch weiteren erfindungsgemäßen Ausführung des Stellventils.

Further properties, advantages and features of the invention are explained by the following description of preferred embodiments of the invention with reference to the accompanying drawings, in which:

• 1 a cross-sectional view of the control valve according to the invention in a lifting valve configuration in an open valve position;
• 2 a cross-sectional view according to FIG 1 wherein the control valve is in a closed valve position;
• 3 a cross-sectional view of a further embodiment of the control valve according to the invention; and
• 4 a cross-sectional view of yet another embodiment of the control valve according to the invention.

In 1 until 4 several versions of the control valve according to the invention are shown in an overall arrangement, with the following components being common to all of the embodiments: a control valve 1, a pneumatic actuator 3 and an electric motor/generator arrangement 5, with particular reference being made below to the generator function of the arrangement 5 .

The control valve 1 comprises a control valve housing 7, which is fixed to a flow inlet 11 and a flow outlet 13, and a mounting flange 15 for mounting system lines, which are not shown in detail in the figures.

Between the flow inlet 11 and the flow outlet 13 is a flow passage Gang 17 defined, which is aligned in the vertical direction, which coincides with a vertical adjustment direction S. The flow passage 17 is formed in an inner rib 21 of the valve housing 7 and receives an inserted sleeve-shaped sealing seat 23, which is formed from a different material, in particular stainless steel or plastic, than the valve housing 7, which is preferably realized from cast metal. The sealing sleeve 23 forms the valve seat 25 of the control valve 1 which is fixed to the housing and which in turn defines a circular sealing surface 27 . The valve seat 23 cooperates with a valve member 31 having a frustoconical shape to open and close the flow passage 17 of the process fluid flow.

The valve member 31 has an upstream frusto-conical turbine section 33 formed with a plurality of integral turbine blades 35 to allow the process fluid flow (not shown) to impart rotational forces to the valve member 31 and cause the valve member 31 to rotate as the process fluid flows from the flow inlet 11 the flow passage 17 passes to the flow outlet 13 . Downstream of the turbine section 35, the valve member 31 comprises a peripheral sealing surface 37 which cooperates in a sealing manner with the peripheral seat sealing surface 27 of the valve seat 25 in a process fluid-tight manner when the valve member 31 is accommodated in a form-fitting manner in the possibly elastically deformable sealing seat 23 ( 2 and 3 ).

The valve member 31 is attached to an output shaft 41 which transmits the rotational drive forces induced by the process fluid flow through the turbine section 33 towards the electric generator 5 . For this purpose, the electric generator 5 comprises a coil arrangement 43 which, as a magnet coil, interacts electromagnetically with a magnet arrangement 45 in order to induce current when the magnet arrangement 45 rotates relative to the non-rotatable coil arrangement 43 . The magnet arrangement 45 is fastened to the output shaft 41 in a rotationally fixed manner.

So that the output shaft 41 can rotate freely, it is rotatably mounted relative to an actuating rod 51 . The actuating rod 51 is designed as a hollow body or hollow tube and accommodates the output shaft 41 in its cavity, which extends along the actuating direction S. For the rotary bearing of the output shaft 41 relative to the actuating rod 51, roller bearings can be provided, which can be designed as ball bearings or other roller bearings, which are generally provided with the reference number 53 in the drawings. Dynamic process fluid seals can be provided in the area of the roller bearings, so that the process fluid is prevented from entering the inner area of the actuating rod cavity. A seal within the actuating hollow rod 51 can be avoided by providing a blind alley cavity formation for the actuating rod 51, as is shown in the embodiment according to FIG 3 is evident.

The actuating rod 51 leads through a housing passage 55 of the valve housing 7 into a drive housing 57 of the actuating drive 3. The actuating drive 3 has a pneumatic working chamber 61, which can be acted upon via a connection 63 with a particularly regulated pneumatic actuating pressure in order to move the actuating rod 51 in the actuating direction S especially between the closed position ( 2 and 3 ) and an open position ( 1 and 4 ) to be able to ask. A compression spring arrangement 67 is installed in a reset chamber 65 that is hermetically airtight in relation to the pneumatic working chamber 61 and moves the actuating rod 51 into the closed position ( 2 and 3 ) forces. In order to pneumatically separate the return chamber 65 from the working chamber 61, a membrane-plate arrangement 71 is provided, which includes a roller membrane 63 and a stiffening plate 75, to which the actuating rod 51 is fastened.

If the pneumatic working chamber 61 is subjected to a pneumatic pressure, the pneumatic pressure acts against the spring force of the spring arrangement 67 and shifts the actuating rod 51 and, with it, the valve member 31 upwards from the closed position into an open position.

So that the actuating rod 51 can be displaced in the actuating direction S, an axial slide bearing 77 is provided in the housing passage 55, which accommodates a process-fluid-tight dynamic seal for an axial actuating movement.

As in 1 until 4 As can be seen, the housing passage 55 is arranged coaxially (with respect to the actuating direction axis S) with respect to the flow passage 17 in order to realize reliable opening and closing of the actuating valve 1 .

When there is flow through the control valve 1 and when the control valve 1 is in the open state, rotary forces act on the valve member 31 due to the turbine blade 35, which causes the valve member 31 to rotate together with the output shaft 41, which rotary output movement is transmitted to the magnet arrangement 45. Currents are induced within the coils 43 of the electric generator 5 and can be supplied via an electric line 81 to an electric consumer or an electric storage device (not shown in detail). The electrical line 81 can through the pneumatic connection 63 of the pneumatic Working chamber 61 be carried out, as in 4 is indicated.

Referring now specifically to the embodiment of FIG 1 and 2 is a power generation system in the control valve consisting of the pneumatic drive 3 and the control valve 1 integrated and is based on the rotatably mounted valve member 31, which is used to open and close the valve seat 25. The rotational bearing is implemented in this example by means of an output shaft 41 which is rotatably mounted in an actuating rod 51 designed as a hollow rod and which is pivoted about the axis S of the actuating direction. For this purpose, two roller bearings 53, in particular in combination with seals, are fastened to the inside of the actuating rod 51, so that the output shaft 41 can rotate freely relative to the actuating rod 51. As in 1 and 2 As can be seen, the actuator rod 51 extends through the valve housing passage 55 into the interior of the actuator 3, specifically into the pneumatic working chamber 61, and includes a mounting portion 81 to which the coils of the electric generator 43 are attached. During a rotary movement between the magnet arrangement 45 attached to the output shaft 41 and the electric generator 43, electric current is induced in its coils and discharged to an electrical consumer (not shown) or an electrical energy store (not shown). At the in 1 and 2 illustrated embodiment, the electric generator 5 moves together with the actuating rod 51 and the valve member 31 in the actuating direction S.

The actuating rod 51 comprises a valve-side, essentially tubular section with a constantly cylindrical outside and inside along the actuating direction. The cylindrical outside serves to realize a sliding bearing in relation to the valve housing passage 55 using a plurality of sealing elements 75 . The cylindrical outer side is extended so far in the axial direction (S) that a sealing/guiding contact is provided between the valve housing passage 55 and the actuating rod 51 along the entire actuating path of the actuating valve 1 . A cross-sectional thickening 85 is provided in the middle area of the actuating rod 51 , which is used to attach the membrane plate 75 to it in order to ensure a pressure-tight coupling between the membrane-plate arrangement 71 and the actuating rod 51 .

As in 1 and 2 As can be seen, the frustoconical outer side of the valve member 31 comprises turbine blade-shaped elevations or depressions which serve to drive the freely rotating valve member 31 as the fluid flow passes from the inlet 11 to the outlet 13 of the control valve 1, so that electric current is produced in the electric generator 5 can be.

When running after 3 the output shaft 41 is divided into two parts, namely a shaft section 87 on the valve member side and a shaft section 89 on the electric generator side. In this way, in the transition/separation area, i.e. at the two opposite free ends of the shaft sections 87, 89, a dead end closure of the cavity of the actuating rod 51 realized, which is executed by an actuating rod inner wall 91. The inner wall 91 divides the cavity of the actuating rod 51 into two blind-hole-like cavities in which the respective output shaft section 87, 89 is rotatably arranged.

So that the drive movements of the valve member 31 in the open state are transmitted from an output shaft section 87 to the separate, opposite output shaft section 89, both opposite output shaft ends of the output shaft sections 87, 89, separated by the inner wall 91, comprise permanent magnets, through which a magnetic coupling 93 between the output shaft sections 87 is realized. Should very strong abrupt driving movements act on the valve member 31, the magnetic coupling 93 achieves a gradual driving rather than an abrupt driving of the shaft sections 87, 89, whereby electrical voltage peaks within the electric generator 5 are avoided. In addition, with the addition of the inner partition 91, it does not require any sealing with regard to the rotary movement between the output shaft 41 and the actuating rod 51.

At the in 4 In the embodiment shown, in addition to the one-piece design of the output shaft 41, it should also be mentioned that the electric motor or electric generator 5 is fixed to the drive housing, so that, in contrast to the above-mentioned embodiments, there is no movement of the electric motor or electric generator 5 in the adjustment direction S. In this way, the dissipation of the electrical energy or the supply of electrical energy via the line 81 is significantly simplified. The electric motor or electric generator 5 is arranged in the pneumatic working chamber 61 of the actuator 3, namely adjacent to the passage 55 through which the actuating rod 51 and the output shaft 41 extend. A seal 95 is provided in the area of the roller bearing 53 for appropriate sealing of the area between the output shaft 41 and the actuating rod 51 .

As already explained above, a magnet arrangement 45' is provided for this embodiment of a stationary electric motor/electric generator, which has such an axial extent that that when the actuating rod 51 is displaced, it is always ensured that the magnet arrangement 45' is electromagnetically influenced by the coils 43 of the electric motor or electric generator 5.

The features disclosed in the above description, the figures and the claims can be important both individually and in any combination for the implementation of the invention in the various configurations.

Reference List

1

control valve

3

actuator

5

electric motor/electric generator

7

control valve body

11

flow inlet

13

flow outlet

15

mounting flange

17

flow passage

21

inner rib

23

Seal seat, sealing sleeve

25

valve seat

27

sealing surface

31

valve member

33

turbine section

35

turbine blade

41

output shaft

43

coil arrangement

45, 45'

magnet assembly

51

adjusting rod

53

ball bearings/roller bearings

55

housing passage

57

drive housing

61

pneumatic working chamber

63

Connection, roller membrane

65

reset chamber

67

compression spring arrangement

71

Diaphragm-disk assembly

75

diaphragm plate

77

bearings

81

electric line, assembly section

87.89

wave section

91

inner wall

93

magnetic clutch

95

poetry

S

setting direction

Claims (12)

Control valve (1) for adjusting a process fluid flow of a chemical or petrochemical plant, a plant for processing food fluids, such as a brewery, or a power plant, such as a nuclear power plant, comprising a control valve housing (7) which defines the position of a stationary valve seat (25). , a valve member (31) which cooperates with the valve seat (25) to open and close the control valve (1), and a bearing for translationally guiding the valve member (31) relative to the valve seat (25) in the control direction (S), wherein this bearing additionally permits a rotational movement of the valve member (31) relative to the valve seat (25), an electric motor (5) or an electric generator (5) being coupled to the valve member (31) in such a way that a rotational drive force between the valve member (31) and the electric generator or electric motor (5), the electric motor (5) being coupled to the valve member (31) in order to drive the valve member (31) to implement a pump function, or the valve member (31) being connected to the electric generator (5 ) is connected in order to convert a fluid flow-induced rotary movement of the valve member (31) in the electric generator (5) into electrical energy, characterized in that a hollow actuator rod (51) is provided which is attached to the valve member (31) in an axial , translational adjusting direction (S) is coupled to drive, so that a linear movement of the adjusting rod (51) leads to a linear movement of the valve member (31), wherein an output shaft (41) arranged in the adjusting rod (51) is also provided, which is connected to the valve member (31) is connected in a rotationally fixed manner, with a rotary bearing being provided between the actuating rod (51) and the output shaft (41), and that a coil arrangement (43) of the electric motor (5) or electric generator (5) is mounted in a rotationally fixed and axially displaceable manner The control rod (51) is attached outside the control valve housing (7), the coil arrangement (43) being moved back and forth with it in accordance with the control movement, and that the valve member (31) is mounted on an output shaft (41) which is rotatably mounted relative to the valve housing (7). is attached, which is divided into two parts, with a valve member-side output shaft part carrying the valve member (31) and the further, outside output shaft part carrying a permanent magnet arrangement (45). Control valve (1) after claim 1 , comprising a control valve housing (7), one of the Pro process fluid to be flowed through, a stationary valve seat (25), a valve member (31) which can be translationally adjusted relative to the valve seat (25) to open and close the control valve (1) and at least when the control valve (1) is in the open state of the process fluid flows around it and interacts with the valve seat (25), characterized in that the valve member (31) has a turbine blade profile in sections and is mounted in relation to the control valve housing (7) in such a way that the process fluid flowing past the sealing surface (27). the valve member (31) is set in rotation. Control valve (1) after claim 1 or 2 , characterized in that there is also an actuating rod (51) for transmitting an actuating force which is generated outside of the actuating valve housing (7) and/or communicated to the actuating rod (51), projects into the actuating valve housing (7) and the valve member (31) is rigidly attached to the actuator rod (51) such that process fluid driving forces acting on the valve member (31) are introduced into the actuator rod (51) for transmission to the outside of the control valve housing (7), or the valve member (31) on the actuator rod (51) is rotatably mounted, with the additional output shaft (41) being provided for the rotatable mounting of the valve member (31) on the actuating rod (51), on which the valve member (31) is attached and which can be rotated on or in the actuating rod (51 ) is stored. Control valve (1) after claim 3 , characterized in that the valve member (31) is rotatably mounted on a valve rod (51), the rotary bearing with respect to the valve rod (51) being designed to entrain the valve member (31) in both translational valve positioning directions (S), or the valve member (31) is rigidly fastened to a valve rod (51), with a valve rod bearing allowing both a translational valve adjustment movement (S) and a rotational movement. Control valve (1) according to one of the preceding claims, characterized in that the valve member (31) has a conical shape with a conical outer active surface around which the process fluid flows at least when the control valve (1) is open, on which a turbine blade profile and a circumferential sealing area without a turbine blade profile (27) is formed, which is shaped like a segment of a cone or is cylindrical and can form a full-circumferential sealing engagement with the valve seat (25) of the control valve (1) when the valve member (31) is in the closed state. Control valve (1) according to one of the preceding claims, characterized in that the drive shaft (41) is arranged concentrically to the control rod (51). Control valve (1) after claim 6 , characterized in that the actuating rod (51) is attached to a chamber divider of a pneumatic actuator (3) with at least one pneumatic working chamber (61) and a return chamber (65), an actuator housing (57) and the control valve housing (7) being flanged to one another and have housing passages that are essentially aligned with one another for the passage of the actuating rod (51). Control valve (1) according to one of the preceding claims, characterized in that the control valve housing (7) has a valve housing passage coaxial with the valve seat (25) and/or diametrically opposite the valve seat (25) for the passage of a control rod (51) to the outside of the valve housing wherein the actuating rod (51) is arranged in the valve housing passage as a bearing sleeve for axial sliding bearing relative to the valve housing passage, the bearing sleeve receiving at least pivot bearings, such as a roller bearing, on its inside for a rotary movement of an output shaft relative to the bearing sleeve. Control valve (1) according to one of the preceding claims, characterized in that both output parts are rotatably mounted in such a way that they can rotate independently of one another, with a coupling being provided for the mutual rotary entrainment of the output shaft parts, the coupling being realized without contact by a magnetic coupling (93). is. Control valve (1) according to one of the preceding claims, characterized in that the coil arrangement (43) of the electric motor (5) or electric generator (5) is attached to the control rod (51) within a reset chamber (65) of a pneumatic control drive (3). Control valve (1) after claim 10 , characterized in that a permanent magnet arrangement (45) is fastened to the output shaft (41) which is firmly connected to the valve member (31) so that it can rotate relative to the coil arrangement (43), so that a common translatory actuating movement of the coil arrangement (43) of the electric motor (5) or electric generator (5) and the permanent magnet arrangement (45) and a relative translational movement between the coil arrangement (43) and the permanent magnet arrangement (45) are permitted. Control valve (1) according to one of the preceding claims, characterized in that an electric motor (5) or an electric generator (5) which cooperates with a permanent magnet arrangement (45) coupled in a torque-proof manner to the valve member (31) outside the valve housing (7) in one Stellant drive housing (57), such as a pneumatic actuator housing, in whose pneumatic working chamber (61) or return chamber (65) is arranged, the permanent magnet arrangement (45) having such an axial longitudinal extension in the direction of adjustment (S) that over an entire adjustment path of the control valve (1) a coil of the electric motor (5) or electric generator (5) is in electromagnetic contact with the magnet arrangement (45').

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