DE212019000439U1 - Power block for actuating a valve closure - Google Patents

Abstract

Actuating system for actuating an actuating element (13) of a component (3, 20), such as a valve to be closed and opened, by means of a cylinder (22) with a piston (26) which is located in a chamber (27) of the cylinder Can move action of a fluid, characterized in that the fluid is a hydraulic fluid and the actuating system (2) also comprises the following:
- a hydraulic pump (17) for pumping the hydraulic fluid,
- An electric motor (18) for driving the hydraulic pump and
- At least one line (30, 40) for the hydraulic fluid, which connects the hydraulic pump to the cylinder chamber.

Description

Field of the Invention

The invention relates to an actuating system for actuating an actuating element of a component, such as the closing element of a valve to be closed and opened, by means of a cylinder with a piston which can move in a chamber of the cylinder under the action of a fluid.

• - das Stellsystem,
• - ein Ventil, das ein Schließglied umfasst, und
• - eine bewegliche Welle (rotierend oder translatorisch beweglich), mit welcher das Schließglied (auch Schieber genannt) verbunden ist.

An assembly that includes the following is also affected:

• - the positioning system,
• - A valve comprising a closing member, and
• - a movable shaft (rotating or translationally movable), with which the closing element (also called slide) is connected.

State of the art

1. 1) pneumatische Mittel: Eine Druckluftquelle versorgt einen oder mehrere Zylinder, die über einen Mechanismus die Öffnungs- oder Schließbewegung des Ventils gewährleisten. Die Nachteile sind der Platzbedarf und die Risiken im Zusammenhang mit unter Druck stehenden Behältern;
2. 2) hydraulische Mittel: Es werden eine externe, zentral gesteuerte Stromversorgung oder ein unabhängiges hydraulisches System, das mit elektrischer Energie betrieben wird, verwendet. Ein Nachteil eines unabhängigen hydraulischen Systems besteht darin, dass es keine kompakten Systeme gibt. Sie sind relativ komplex und sehr kostenintensiv;
3. 3) elektrische Mittel: Ein Motor sorgt für die Drehung des Schließglieds des Ventils mittels eines mehr oder weniger großen Rädergetriebes. Die Nachteilen sind unter anderem Folgende: Diese Lösung ist nur bei niedrigen Leistungen interessant, die Lösung ist langsam und nicht reversibel, d.h. sie kann nicht für Ventile mit Sicherheitsfunktionen verwendet werden;
4. 4) viele Ventile mit translatorisch beweglichen Wellen haben eine ungenaue und/oder schwer einstellbare Regelung.

The actuating system which is the subject of the invention can be used instead of known pneumatic or hydraulic cylinders. There are typically the following options for operating a valve actuator:

1. 1) Pneumatic means: A source of compressed air supplies one or more cylinders which, via a mechanism, ensure the opening or closing movement of the valve. The disadvantages are the space requirements and the risks associated with pressurized containers;
2. 2) hydraulic means: an external, centrally controlled power supply or an independent hydraulic system that is powered by electrical energy is used. A disadvantage of an independent hydraulic system is that there are no compact systems. They are relatively complex and very expensive;
3. 3) electrical means: a motor turns the closing element of the valve by means of a more or less large gear train. The disadvantages are, among others, the following: This solution is only of interest at low powers, the solution is slow and irreversible, ie it cannot be used for valves with safety functions;
4. 4) Many valves with translationally movable shafts have an imprecise and / or difficult to adjust control.

Description and Summary of the Invention

• - dass die Flüssigkeit in der Kammer des Zylinders hydraulisch ist, und
• - dass das vorgenannte Stellsystem ferner folgendes umfasst:
  • -- eine Hydraulikpumpe zum Pumpen der Hydraulikflüssigkeit,
  • - einem Elektromotor zum Anteiben der Hydraulikpumpe,
  • -- mindestens eine Leitung für die Hydraulikflüssigkeit, welche die Hydraulikpumpe mit der Kammer des Zylinders verbindet.

To find a solution to at least some of the disadvantages mentioned above, it is suggested:

• - that the liquid in the chamber of the cylinder is hydraulic, and
• - That the aforementioned positioning system also includes the following:
  • - a hydraulic pump for pumping the hydraulic fluid,
  • - an electric motor to drive the hydraulic pump,
  • - At least one line for the hydraulic fluid, which connects the hydraulic pump with the chamber of the cylinder.

• - die Kammer des Zylinders,
• - die Hydraulikflüssigkeit,
• - die Hydraulikpumpe, die zum Pumpen im Gehäuse geeignet ist,
• - den Elektromotor, der so angepasst, ist, dass er sich für den Betrieb eingetaucht in die Hydraulikflüssigkeit des Gehäuses eignet, und
• - die (mindestens eine) Leitung für die Hydraulikflüssigkeit.

For reasons of efficiency and compactness, it is also proposed that the actuating system also comprises a housing which contains the following:

• - the chamber of the cylinder,
• - the hydraulic fluid,
• - the hydraulic pump, which is suitable for pumping in the housing,
• the electric motor adapted to operate immersed in the hydraulic fluid of the housing, and
• - the (at least one) line for the hydraulic fluid.

To increase the efficiency and performance of the actuating system, it is further proposed that the actuating system, preferably in the housing, include a distributor block for controlling the hydraulic fluid supply to the cylinder chamber.

Furthermore, in order to increase efficiency and compactness, it is proposed that this distributor block be arranged between the hydraulic pump and the electric motor and that a drive shaft of the electric motor passes through it.

• - dass ein Antriebswellenende des Elektromotors aus dem Gehäuse herausragt und so geformt ist, dass es mit einem Aufsatz einer Bohrmaschine oder eines Schraubers angetrieben werden kann, und/oder
• - dass das Stellsystem so beschaffen ist, dass:
  • --der Zylinder einfachwirkend ist,
  • -- das Stellsystem ferner einen Hydraulikspeicher umfasst, der zur Sicherheit mit einem Teil der Zylinderkammer hydraulisch verbunden ist, damit die darin enthaltene Hydraulikflüssigkeit auf einer Seite des Kolbens wirken kann.

To be on the safe side, it is also suggested:

• - That a drive shaft end of the electric motor protrudes from the housing and is shaped so that it can be driven with an attachment of a drill or a screwdriver, and / or
• - that the positioning system is designed so that:
  • - the cylinder is single-acting,
  • the actuating system further comprises a hydraulic accumulator which is hydraulically connected to part of the cylinder chamber for safety, so that the hydraulic fluid contained therein can act on one side of the piston.

For the same purpose, the actuating system preferably also comprises a pilot valve which acts at the output of the hydraulic accumulator in order to control the hydraulic fluid which it can deliver to the part of the cylinder chamber. In order to operate the closing member of the valve efficiently and compactly, it is also proposed that the piston outside the chamber of the cylinder and the housing has a mechanical connection with a rack carrier which is brought into meshing connection with a rotating gear connected to the valve, wherein this carrier then forms the above-mentioned actuating element.

Alternatively, the mechanical connection of the piston outside of the cylinder chamber and housing can not be established with a rack carrier, but with a translationally movable shaft as the actuating element.

This works in the case of a valve with a linearly moved closing member, as mentioned above. For a comparable purpose, it is also proposed that the piston have a rod outside of the cylinder chamber and housing, which rod passes through a wall of the housing which is in contact with the hydraulic fluid and to which the cylinder chamber is adjacent.

• - einen rohrförmigen Körper, der mit den unteren, die Enden verschließenden Seitenwänden im Gehäuse ein Speichervolumen für die Hydraulikflüssigkeit abgrenzt
• - und durch das Speichervolumen der Hydraulikflüssigkeit verlaufende Zugstangen zum Halten der unteren Seitenwände relativ zum rohrförmigen Körper.

To facilitate manufacture, maintenance and compactness, the housing of the actuating system can in particular include the following:

• - A tubular body which, with the lower, the ends closing side walls in the housing, delimits a storage volume for the hydraulic fluid
• and tie rods extending through the storage volume of the hydraulic fluid for holding the lower side walls relative to the tubular body.

• - eine Steuereinheit, die an einer Verkleidung befestigt ist, welche ein Volumen mit Zahnstange, deren Träger und dem rotierenden Zahnrad schließt, wenn sich die Welle dreht, oder eine an einem Ventilkörper befestigte Steuereinheit, wenn die Welle translatorisch beweglich ist, und
• - eine elektrische Verbindung zwischen der Steuereinheit einerseits und der Hydraulikpumpe und dem Elektromotor andererseits.

With regard to the aforementioned assembly with the actuating system, the slide valve and the shaft to which this slide is connected, it is proposed that it also include the following:

• a control unit attached to a casing which closes a volume with the rack, its carrier and the rotating gearwheel when the shaft rotates, or a control unit attached to a valve body when the shaft is translationally movable, and
• - An electrical connection between the control unit on the one hand and the hydraulic pump and the electric motor on the other hand.

The aim of compactness is thus pursued.

Figure list

• ] shows a valve control assembly according to the invention according to a view from below, with a tear-off part and a coupling with elastic return means;
• ] shows the same assembly in a side view;
• ] represents a control part of this closure in vertical section in the plane P of dar;
• ] shows the right part of , supplemented by a hydraulic safety accumulator with a pilot valve;
• ] shows a perspective view of the said control assembly of a roller shutter according to the invention, but only with an actuator and a power unit, without elastic return means, and
• ] represents an alternative embodiment with a slide lock.

Detailed description of the invention

• - ein nachstehend näher beschriebenes Leistungsteil 2 in einer mit der Erfindung kompatiblen Ausführungsform
• - ein Ventil 20 mit einem Verschluss 3,
• - eine rotierende Welle 13, mit der ein rotierendes Zahnrad 11 verbunden ist und die von diesem in Drehung versetzt wird.

One aspect of the invention therefore relates, as in FIGS shown on an assembly 1 , full;

• - a power unit described in more detail below 2 in an embodiment compatible with the invention
• - a valve 20th with a clasp 3 ,
• - a rotating shaft 13th with which a rotating gear 11 is connected and which is set in rotation by this.

In this embodiment the valve 20th via a rack 9 operated by a toothed, rotating pinion 11 combs.

The pictured pinion 11 has an elliptical cross-section.

With an appropriate solution, the teeth are in place 110 of the pinion 11 that is, along several different radii. These radii determine the minimum and maximum torques available.

The rack 9 extends generally transverse to the axis of rotation 11a of the pinion 11 , generally along one direction 191 along which the involute curve extends at least part of the original circumference of the pinion (at the location of the circumferential teeth 110 ; )

The pinion 11 is also with the wave 13th connected so that one transmits a torque to the other. In practice this torque will be proportional to that produced by the rack 9 on the pinion 11 is exercised, in turn by an actuator 5 is driven in translation.

The rotating shaft 13th is fixed to the roller shutter to be operated 3 connected (see ).

In the axial extension (axis 191 ) one of the two opposite ends of the beam 15th the rack 9 is an actuator 5 with an operating rod 50a (Block marking 5/2). There can be nothing on the opposite side, as in shown, or another housing 310 made by a tubular body 370 is limited and a means 311 for elastic return along the axis 191 contains, as in shown. The resilient return means 311 , which can be a compression spring, can be inside the housing 310 on a piston 313 with an operating rod 50b works.

Note that the rod (s) 50a , 50b thus in one and / or the other of the lateral extensions of the carrier 15th along the axis 191 extends / extend. That part of the mechanism that holds the rack 9 , the pinion 11 , the shaft or sleeve 13th and the rack carrier 15th includes, can in a housing 23 that is made up of two parts 23a , 23b consists, which form two complementary half-shells. There are openings on the side, such as B. 25a , 25b in through which the relevant staff 50a , 50b can be passed through.

• - einem am Gehäuse 23 (einem der beiden Teile 23a, 23b) befestigten Steuerkasten 14, der somit ein Volumen 24 ( ) verschließt, das die Zahnstange 9, ihren Träger 15 und das Ritzel 11 enthält,
• - und eine elektrische Verbindung 12 zwischen :
  • -- einem Steuerkasten 14 einerseits, und
  • -- das Aggregat 2, insbesondere eine Hydraulikpumpe 17 und einen Elektromotor 18, die dieses Aggregat 2 enthält.

shows that the assembly 1 can expediently further include:

• - one on the case 23 (one of the two parts 23a , 23b ) attached control box 14th , which is thus a volume 24 ( ) that closes the rack 9 , their carrier 15th and the pinion 11 contains,
• - and an electrical connection 12th between :
  • - a control box 14th on the one hand, and
  • - the aggregate 2 , especially a hydraulic pump 17th and an electric motor 18th who have this aggregate 2 contains.

the show in detail a content of the performance block 2 , according to one embodiment of an aspect of the invention.

So we see such a power block 2 to operate (at least) one element 50a to move an item 3 , as in this case the closure of the valve 20th for closing and opening, by means of a lifter 22nd holding a piston 26th includes, who is in a chamber 27 of the jack can move under the action of a hydraulic fluid.

• - eine Hydraulikpumpe 17, die Hydraulikflüssigkeit fördert,
• - der Elektromotor 18, der die Hydraulikpumpe 17 antreibt, und,
• - mindestens eine Leitung 30 oder 40 für die Hydraulikflüssigkeit, die die Hydraulikpumpe 17 mit dem Zylinderraum 27 verbindet.

The power part 2 also includes:

• - a hydraulic pump 17th that pumps hydraulic fluid,
• - the electric motor 18th holding the hydraulic pump 17th drives, and,
• - at least one line 30th or 40 for the hydraulic fluid that the hydraulic pump 17th with the cylinder space 27 connects.

• - den Zylinderraum 27,
• - die Hydraulikpumpe 17, die somit zum Pumpen der im Gehäuse 31 enthaltenen Hydraulikflüssigkeit geeignet ist
• - den Elektromotor 18, der damit für den Tauchbetrieb in dieser Hydraulikflüssigkeit geeignet ist, sowie
• - die Leitung 30 oder 40.

The power part expediently comprises 2 also a case 31 , the :

• - the cylinder space 27 ,
• - the hydraulic pump 17th which is thus used to pump the in the housing 31 hydraulic fluid contained is suitable
• - the electric motor 18th , which is therefore suitable for diving operation in this hydraulic fluid, as well as
• - The administration 30th or 40 .

To get on the carrier 15th the rack 9 the (each) piston outside the chamber has to act 27 of the cylinder and the housing 31 and in the in schematically illustrated preferred solution a rod 50a or 50b going through a wall of the cabinet 31 which is in contact with the hydraulic fluid and to which the chamber passes 27 is present. The free end of the stick 50a or. 50b is therefore outside the housing 31 mechanically with the carrier 15th connected (in the example hole / pin connection).

There is a distribution block in the housing 32 that controls the supply of hydraulic fluid to the chamber 27 of the lifter regulates. This controls the various functions of the flow and pressure management of the cylinder supply circuit.

If available, such a distribution block will be used 32 between the hydraulic pump 17th and the electric motor 18th switched. Ergonomics, efficiency and compactness are optimized.

The distribution block 32 is by a wave 180 to drive the electric motor 18th run through.

To operate the valve lock 3 To enable this in the absence of electrical energy can come to an end 180a the drive shaft 180 out of the case 31 stick out and has a shape 29 that allows it to be with one bit 34 a drill or hand screwdriver (not shown) to drive.

Also, especially for safety reasons, when the cylinder 22nd is single-acting, the power block can 2 expediently still a hydraulic accumulator 33 ( ), which is hydraulically connected to one part (one side) 27a the cylinder chamber 27 connected is.

This can be done in the hydraulic accumulator 33 contained hydraulic fluid on one side of the piston 26th works.

Advantageously, a can with the outlet 33a of the hydraulic accumulator 33 connected pilot valve 35 be provided, which is used to pilot the hydraulic fluid that the hydraulic accumulator 33 to the mentioned section 27a the cylinder chamber can deliver.

When the lifter 22nd is single-acting, the rod could 50a under the action of the power block 2 out of the case 31 comes out at the other end by the elastic return means 311 along the axis 191 about the on the carrier 15th attached coaxial rod 50b and also about the piston 313 be pushed back.

• - einem rohrförmigen Körper 37, der zusammen mit unteren Seitenwänden 39, 41 oder Flanschen, die seine axial gegenüberliegenden Enden verschließen, innerhalb des Gehäuses 31 ein Volumen V zur Speicherung der Hydraulikflüssigkeit definiert,
• - und, durch dieses Volumen V hindurchgehend, axiale Zugstangen 43 zum Halten der Seitenwände 39, 41 relativ zum Körper 37.

In order to produce the frame of the power block, it can expediently be preferred that the housing 31 , as in shown, consists of:

• - a tubular body 37 that along with lower sidewalls 39 , 41 or flanges closing its axially opposite ends within the housing 31 defines a volume V for storing the hydraulic fluid,
• - and, passing through this volume V, axial tie rods 43 to hold the side walls 39 , 41 relative to the body 37 .

Nuts ensure the shut-off and sealing via seals from the outside of the housing 31 .

The hydraulic fluid can be oil. The filling and draining connections are located in the power section 44 , 45 sufficient liquid available in each case. The considered cylinder 22nd that is in the axis 191 the pole 50a acts, is thus advantageously converted into a (here 39 ) of the side walls 39 , 41 integrated and connected to it. In the case 31 can the cylinder 47 of the lifter 22nd through a floor 49 be closed, the axially opposite the side wall 39 lies through which the rod 50a runs; .

The floor 49 is made by tie rods 51 axially on the wall 39 held.

The hydraulic fluid can be on the rod side 50a through one in the wall 39 incorporated opening and on the bottom side 49 be fed through an opening in this bottom.

The compact assembly that axially staggered the electric motor 18th , the distribution block 32 and then the hydraulic pump 17th includes, all of which are suitable for operation submerged in oil, is on the bottom / side wall 41 attached and with the cylinder 22nd via the flexible lines or hoses 30th , 40 connected that allow the two sides 27a , 27b the chamber, since the cylinder is bidirectional in the example.

The electric motor 18th can be supplied with different voltages on request (380V 220V three-phase, 220V 110V single-phase or 48V / 24V DC.

The control box 14th can expediently consist of a sealed housing, the bottom of which directly on a part 23a of the mechanism housing 23 is attached.

From inside a wave transmits the movement of the rod (s) 50a and or 50b the end-of-travel mechanism (in this case the rotation) of the roller shutter shaft 3 from as well as one from the outside of the box 14th visible display 53 the position of the pinion 11 .

To this control box 14th are an input cable 55 , the cable 12th for the supply of the electric motor 18 / distributor block 32 / hydraulic pump 17 and a control cable 59 connected; .

With the block 5/2 it can be achieved that no mechanical elements are visible outside the frame mentioned above.

In the in The embodiment shown is the aforementioned rotating shaft by a translationally movable shaft 13th (Axis 191 ) replaced under the control of the rod coaxial with it 50a stands. The inside of the 5/2 block is like in shown. The pole 50a is through the power block 2 controlled that on the cylinder 22nd works. When the piston 16 moves, he drives the rod 50a axially and thus causes, in the figure, an upward or downward movement of the shutter 3 (see arrows). The connection between the inner pipe sections 61a , 61b of the valve, on both sides of the shut-off device 3 , opens (shut-off device 3 in high position) or closes (shut-off device in low position) accordingly. Axial tie rods 63a , 63b fix the housing 21 of the valve 20th and the case 37 together. A guided tour 65 ensures the axial displacement.

1. a) kompakter Aufbau: der Leistungsteil ist frei von externen Elementen (Rohre, Relaisgetriebe, Zugstangen, ...etc),
2. b) Multifunktion: Das Leistungsteil ist vielseitig einsetzbar. Er kann in doppeltwirkender, einfachwirkender Funktion mit einer Rückholfederbox oder einem Hydrospeicher...etc. eingesetzt werden,
3. c) integrierte Handbetätigung: Das Netzteil kann bei Bedarf manuell bedient werden,
4. d) wartungs- und einstellungsfrei: das Aggregat ist werkseitig auf den erforderlichen Hydraulikdruck entsprechend den an dem zu betätigenden Ventil 3 anliegenden Drehmomenten eingestellt. Diese Einstellung liegt knapp unter dem, was für den Betrieb des Ventils erforderlich ist, da sie das Ventil und insbesondere die Abtriebswelle 13 vor Überlastung schützt.
5. e) Lange Lebensdauer: Ein hydraulisches System hat eine lange Lebensdauer. Die Komponenten sind in die Hydraulikflüssigkeit eingetaucht. Sie sind keinen äußeren mechanischen oder chemischen Angriffen ausgesetzt, was sie zu einem äußerst zuverlässigen Produkt macht.
6. f) Schaltkasten: Der elektrische Schaltkasten ermöglicht die Integration der Steuerung des Elektromotors 18 und ggf. zweier Endschalter mit Kontakt.
7. g) Schutz des Elektromotors 18: Er ist gegen Spannungsausfall, Phasenausfall, Überstrom und im Falle eines anormalen Temperaturanstiegs geschützt;
8. h) Stromversorgung (Kabel 12,55,59): Standard 200V /400V Dreiphasen-Netzteil. Es sind einzelne AC- oder DC-Versionen möglich,
9. i) geringer Energieverbrauch: ein elliptisches Ritzel 11 optimiert die auf das Ventil 3 wirkenden Drehmomente knapp unterhalb des erforderlichen Drehmoments; und der sehr hohe Wirkungsgrad der elektrohydraulischen Baugruppe bedeutet, dass der Gesamtenergieverbrauch minimiert wird.

The advantages of the invention include:

1. a) compact design: the power section is free of external elements (pipes, relay gears, tie rods, ... etc),
2. b) Multifunction: The power unit can be used in many ways. It can be used in a double-acting, single-acting function with a return spring box or a hydraulic accumulator ... etc. be used,
3. c) integrated manual operation: the power pack can be operated manually if required,
4. d) maintenance and adjustment-free: the unit is factory-set to the required hydraulic pressure according to the valve to be operated 3 applied torques are set. This setting is just below what is required for the valve to operate as it affects the valve and especially the output shaft 13th protects against overload.
5. e) Long service life: A hydraulic system has a long service life. The components are immersed in the hydraulic fluid. They are not exposed to any external mechanical or chemical attack, which makes them an extremely reliable product.
6. f) Control box: The electrical control box enables the integration of the control of the electric motor 18th and, if necessary, two limit switches with contact.
7. g) Protection of the electric motor 18th : It is protected against power failure, phase failure, overcurrent and in case of abnormal temperature rise;
8. h) Power supply (cable 12,55,59): Standard 200V / 400V three-phase power supply. Individual AC or DC versions are possible,
9. i) low energy consumption: an elliptical pinion 11 optimizes the on the valve 3 acting torques just below the required torque; and the very high efficiency of the electro-hydraulic assembly means that the total energy consumption is minimized.

Claims (23)

Actuating system for actuating an actuating element (13) of a component (3, 20), such as a valve to be closed and opened, by means of a cylinder (22) with a piston (26) which is located in a chamber (27) of the cylinder Can move action of a fluid, characterized in that the fluid is a hydraulic fluid and the actuating system (2) also comprises: - a hydraulic pump (17) for pumping the hydraulic fluid, - an electric motor (18) for driving the hydraulic pump and - at least a line (30, 40) for the hydraulic fluid, which connects the hydraulic pump with the cylinder chamber. Adjusting system according to Claim 1 , which also comprises a housing (31) with: - the cylinder chamber (27), - the hydraulic fluid, - the hydraulic pump (17), which is suitable for pumping into the housing (31), - the electric motor (18), the is suitable for operation immersed in the hydraulic fluid of the housing, - the at least one line for the hydraulic fluid. Adjusting system according to Claim 2 , which also preferably comprises a distributor block (32) in the housing for controlling the supply of hydraulic fluid to the chamber (27) of the cylinder. Adjusting system according to Claim 3 , in which the distributor block (32) is arranged between the hydraulic pump and the electric motor (18), a drive shaft (180) of the electric motor passing through it. Adjusting system according to Claim 2 , alone or in combination with one of the Claims 3 or 4th , in which a drive shaft end (180a) of the electric motor (18) protrudes from the housing (31) and is shaped so that it can be driven with an attachment (34) of a drill or screwdriver. Positioning system according to one of the preceding claims, in which: - the cylinder (22) is single-acting, - The actuating system (16) also comprises a hydraulic accumulator (33) which is hydraulically connected to a part of the chamber (27) of the cylinder for safety, so that the hydraulic fluid contained can act on one side of the piston (26). Adjusting system according to Claim 3 which also comprises a pilot valve (35) acting at the outlet of the hydraulic accumulator (33) in order to control the hydraulic fluid that it can deliver to the part of the cylinder chamber. Actuating system according to one of the preceding claims, in which the piston (26) outside of the cylinder chamber (27) and housing (31) has a mechanical connection with a carrier (15) of a rack (9) which forms the actuating element and with a rotating gear (11) is brought into an intervening connection. Positioning system according to one of the Claims 1 until 7th , in which the piston (26) outside of the cylinder chamber (27) and housing (31) has a mechanical connection with a translationally movable shaft (13) which forms the actuating element. Actuating system according to one of the preceding claims, in which the piston outside of the cylinder chamber and housing (31) has a rod (50a) which passes through a wall (39) of the housing (31) which is in contact with the hydraulic fluid and on which the cylinder chamber (27) is adjacent. Positioning system according to one of the preceding Claims 1 until 9 , in which the housing (31) comprises: - a tubular body (37) which, with lower side walls (39, 41) which close its ends, delimits a storage volume for the hydraulic fluid in the housing (31), - and through which Hydraulic fluid storage volume leading tie rods (51) for holding the lower side walls relative to the tubular body (37). Assembly consisting of: - according to the positioning system Claim 8 , alone or in combination with one of the Claims 10 or 11 - a valve with a closing element (3), - a rotating shaft (13) to which the closing element (3) is connected and which is set in rotation by the rotating gear (11). Assembly according to Claim 12 which further comprises: - a control unit (14) attached to a casing (23) which closes a volume (24) and the rack (9), its support (15) and the rotating gear (11) contains, and - an electrical connection (12) between the control unit (14) on the one hand and the hydraulic pump and the electric motor (17) on the other hand. Assembly comprising: - the actuating system according to Claim 9 , alone or in combination with one of the Claims 10 or 11 - a valve with a closing element (3), - the translationally movable shaft (13) to which the closing element (3) is connected and which is driven by the piston (26). Assembly according to Claim 14 which further comprises: - a control unit (14) connected to a body (21) of a valve (20), and - an electrical connection (12) between the Control unit (14) on the one hand and the hydraulic pump and the electric motor (17) on the other. Assembly that includes: - a valve (20) with a closing element (3), - an actuating system for actuating an actuating element (13) of the closing element to be closed and opened by means of a cylinder (22) of the actuating system with a piston (26) which can move in a chamber (27) of the cylinder under the action of a hydraulic fluid, - a hydraulic pump (17) for pumping the hydraulic fluid, - An electric motor (18) for driving the hydraulic pump and - At least one line (30, 40) for the hydraulic fluid, which connects the hydraulic pump with the cylinder chamber, - a housing (31) containing: - the cylinder chamber (27), - the hydraulic fluid, - the hydraulic pump (17), which is suitable for pumping into the housing (31), - The electric motor (18), which is suitable for operation immersed in the hydraulic fluid of the housing, and - the at least one line for the hydraulic fluid, and: - Either a carrier (15) for a rack (9), a rotating gear (11) and a rotating shaft (13) to which the closing element (3) is connected and which is set in rotation by the rotating gear (11) the piston (26) outside the chamber (27) of the cylinder and the housing (31) having a mechanical connection with said support (15) and the rack (9) forming said actuating element and with the rotating gear (11) is in engagement connection, the assembly also comprising a control unit (14) which is attached to a casing (23) which closes a volume (24) that contains the rack (9), its carrier (15) and the rotating gear ( 11), and an electrical connection (12) between the control unit (14) on the one hand and the hydraulic pump and the electric motor (17) on the other hand, - Or a translationally movable shaft (13) to which the closing element (3) is connected, the translationally movable shaft (13) being driven by the piston (26) and forming the actuating element, the piston (26) outside the chamber (27) of the cylinder and of the housing (31) has a mechanical connection with the translationally movable shaft (13), the assembly also comprises a control unit (14) which is attached to a body (21) of the valve (20), and an electrical connection (12) between the control unit (14) on the one hand and the hydraulic pump and the electric motor (17) on the other. Assembly according to Claim 16 which also comprises a distributor block (32) in the housing for controlling the supply of hydraulic fluid to the chamber (27) of the cylinder. Assembly according to Claim 17 , in which the distributor block (32) is arranged between the hydraulic pump and the electric motor (18), a drive shaft (180) of the electric motor passing through it. Assembly according to one of the Claims 16 until 18th , in which a drive shaft end (180a) of the electric motor (18) protrudes from the housing (31) and is shaped so that it can be driven with an attachment (34) of a drill or screwdriver. Assembly according to one of the Claims 16 until 19th , in which: - the cylinder (22) is single-acting, - the actuating system also includes a hydraulic accumulator (33), which is hydraulically connected to part of the chamber (27) of the cylinder for safety, so that the hydraulic fluid contained on one side of the Piston (26) can act. Assembly according to one of the Claims 16 until 20th which further comprises a pilot valve (35) acting at the outlet of the hydraulic accumulator (33) in order to control the hydraulic fluid which it can deliver to the part of the cylinder chamber. Assembly according to one of the Claims 16 until 21 , in which the piston outside of the cylinder chamber and housing (31) has as a mechanical connection a rod (50a) which passes through a wall (39) of the housing (31) which is in contact with the hydraulic fluid and on which the cylinder chamber ( 27) is adjacent. Assembly according to one of the Claims 16 until 22nd , in which the housing (31) comprises: - a tubular body (37) which, with lower side walls (39, 41) which close its ends, delimits a storage volume for the hydraulic fluid in the housing (31), - and through which Hydraulic fluid storage volume through pull rods (51) for holding the lower side walls relative to the tubular body (37).

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