DE112014005533T5 - Shut-off valve for a hydraulic accumulator, arrangement provided with such a valve, corresponding mounting method - Google Patents

Abstract

The valve (1) comprises: - a hollow body (15) having a fluid passageway (17) having an inlet (19) and an outlet (21); - A valve member (25) which is movable relative to the hollow body (15) between a position for closing the inlet (19) and a position for releasing the inlet (19); - A spring element (7), which resets the valve element (25) in its release position; The valve (1) comprises a control element (29) which is connected to the valve element (25) and is selectively movable relative to the hollow body (15) between a first stable position in which the control element (29) controls the valve element (25). blocked in the closed position, and a second stable position in which the valve element (25) moves freely between its closed position and its release position.

Description

The present invention relates generally to hydraulic accumulators.

• – einen Hohlkörper mit einer Durchgangsleitung für ein Fluid, die einen Einlass und einen Auslass aufweist, wobei der Einlass für die Verbindung mit einer Öffnung des Hydraulikspeichers vorgesehen ist;
• – ein Antiverdrängungsventil, das relativ zu dem Hohlkörper beweglich ist zwischen einer Stellung zum Verschließen des Einlasses und einer Stellung zum Freigeben des Einlasses;
• – ein Federelement, welches das Ventilelement in seine Freigabestellung zurückstellt.

In particular, the invention according to a first aspect relates to a shut-off valve for a hydraulic accumulator, of the type comprising:

• A hollow body having a passage line for a fluid having an inlet and an outlet, the inlet being provided for connection to an opening of the hydraulic accumulator;
• - An anti-displacement valve which is movable relative to the hollow body between a position for closing the inlet and a position for releasing the inlet;
• - A spring element which resets the valve element in its release position.

It is known to provide a hydraulic accumulator with such a valve. It makes it possible to isolate the interior of the hydraulic accumulator from the through-line in the event of overpressure inside the accumulator. When the accumulator is of the membrane accumulator type, the valve element prevents the displacement of the membrane at the edges of the inlet of the passageway.

Incidentally, it is known, in addition to the anti-displacement valve, to provide a shut-off element, for example a ball valve, at the outlet of the through-line.

Namely, the memories are used on board vehicles as energy storage devices. They generally comprise two chambers, one containing a liquid such as an oil and the other gas. The ball valve placed at the outlet of the chamber containing the oil makes it possible to allow or prevent the circulation of oil between the reservoir and the rest of the vehicle.

The storage tank is filled with oil in the workshop and then mounted on board the vehicle. The ball valve is opened during filling and is then closed to isolate the chamber containing the oil during connection of the passage line with the oil circuit of the vehicle. The closing of the ball valve in particular makes it possible to transport the reservoir filled with oil and to evacuate the through-line to carry out its initial filling with oil as soon as this passage is connected to the circulation of the vehicle. The ball valve is then reopened to allow operation of the memory. It remains permanently open when de-energized, for example until the accumulator is dismantled.

The fact that an anti-drain valve, along with a ball valve, is present at the outlet of the store adds to the cost and space requirements.

In this context, the invention serves to simplify the connection between the memory and the vehicle and to reduce their space requirements.

To this end, the invention relates to a shut-off valve for a hydraulic accumulator of the above type, characterized in that the valve comprises a control element which is connected to the anti-displacement valve and is selectively movable relative to the hollow body between a first stable position the control element blocks the valve element in the closed position, and a second stable position in which the valve element moves freely between its closed position and its release position.

Thus, the anti-displacement valve serves as a shut-off element. This makes it possible to simplify the connection between the memory and the vehicle and to reduce their space requirements.

Advantageously, the control member has a camming surface provided so that when the control member is placed in an intermediate position between its first and second stable positions, the spring member moves the control member to the second stable position.

As a variant, the spring element moves the control element into the first stable position.

Thus, the valve element is always either in its release position or in its closed position.

This is especially important when the hydraulic accumulator is used to recover the braking energy of the vehicle. The energy is stored in the reservoir by transferring oil into the chamber of the reservoir, the oil compressing the gas in the other chamber. This energy can then be returned, especially at a start or at an abrupt acceleration, when an increase in power is necessary.

For proper system operation, oil must be able to circulate between the reservoir and the vehicle's circuit with minimal loss of load. When the accumulator is provided with a prior art anti-drainage valve reinforced by a ball valve, it happens that the user mounting the accumulator on the vehicle does not recover the ball valve completely opens. This results in the generation of a high load loss and a significant reduction in the performance of the energy recovery system.

With the valve according to the invention, such a problem can not occur because the control can not remain in the intermediate position.

• – das Ventilelement weist einen Verschlusskörper und einen Schaft auf, der mit dem Verschlusskörper verbunden ist und mit dem Steuerelement zusammenwirkt;
• – die Nockenfläche weist einen ersten und zweiten Abschnitt auf, die zueinander im Wesentlichen senkrecht sind und durch ein Winkelstück mit einem geringen Krümmungsradius verbunden sind;
• – das Steuerelement ist eine drehbare Hahnkugel, die in den Hohlkörper eingesetzt ist und eine Drehachse hat, die zu einer Richtung der Bewegung des Ventilelements zwischen seiner Verschluss- und Freigabestellung im Wesentlichen senkrecht ist;
• – die Hahnkugel ist hohl, wobei die Nockenfläche auf einer radial inneren Fläche der Hahnkugel vorgesehen ist, wobei das Ventilelement einen Nockenstößel aufweist, der mit der Nockenfläche zusammenwirkt;
• – das Steuerelement ist ein Hebel, der über die Nockenfläche gegen den Hohlkörper gleitet;
• – ein Schaft des Ventilelements weist mindestens ein Langloch auf, das parallel zu dem Schaft langgestreckt ist, wobei der Hebel mindestens einen Bolzen aufweist, der in das Langloch eingesetzt ist;
• – er weist ein Element zum Blockieren des Hebels in der zweiten stabilen Stellung auf.

The valve may have one or more of the features below, or in all technically possible combinations:

• - The valve element has a closure body and a shaft which is connected to the closure body and cooperates with the control element;
• - The cam surface has a first and second portion which are mutually substantially perpendicular and are connected by an angle piece with a small radius of curvature;
• - The control is a rotatable hammer ball which is inserted into the hollow body and has an axis of rotation which is substantially perpendicular to a direction of movement of the valve element between its closing and releasing position;
• - The tap ball is hollow, wherein the cam surface is provided on a radially inner surface of the tap ball, wherein the valve element has a cam follower which cooperates with the cam surface;
• - The control is a lever which slides over the cam surface against the hollow body;
• - A shaft of the valve element has at least one elongated hole which is elongated parallel to the shaft, wherein the lever has at least one bolt which is inserted into the slot;
• It has an element for blocking the lever in the second stable position.

According to a second aspect, the invention relates to an arrangement with a hydraulic accumulator and a shut-off valve for the hydraulic accumulator having the above features, wherein the hydraulic accumulator has a rigid housing and a housing accommodated in the flexible housing expandable sheath, wherein the valve element in the release position by the Opening penetrates into the interior of the rigid housing to prevent the expandable sheath penetrates into the inlet.

• – Verbringen des Steuerelements in seine zweite stabile Stellung;
• – Befüllen des Hydraulikspeichers mit einem Fluid, durch die Durchgangsleitung hindurch;
• – Verbringen des Steuerelements in seine erste stabile Stellung;
• – Montieren des Hydraulikspeichers an Bord des Fahrzeugs und Verbinden des Auslasses der Durchgangsleitung mit einem Fluidkreislauf des Fahrzeugs;
• – Verbringen des Steuerelements in seine zweite stabile Stellung.

According to a third aspect, the invention relates to a method for mounting, on board a vehicle, a hydraulic accumulator, which is provided with a shut-off valve with the above features, the method comprising the following steps:

• - Spend the control in its second stable position;
• - Filling the hydraulic accumulator with a fluid, through the passage line therethrough;
• - Spend the control in its first stable position;
• Mounting the hydraulic accumulator on board the vehicle and connecting the outlet of the passage line to a fluid circuit of the vehicle;
• - Spend the control in its second stable position.

Typically, the hydraulic accumulator is filled with fluid in a filling workshop. It is mounted on board the vehicle in a final operation for the production of the vehicle, which is removed from the manufacturing workshop. It is transported from the filling workshop to the final operation with the control in the first position.

Further advantages and features of the invention will become apparent from the description given below by way of example and in no way limiting with reference to the accompanying drawings; show it:

1 a sectional view of the arrangement having a memory and a shut-off valve according to a first embodiment of the valve;

2 an elevational perspective view of the valve according to the first embodiment;

3 and 4 Sectional views of the valve according to the first embodiment, when the valve is in the open position or when the valve is in the closed position; and

5 and 6 Sectional views of the valve according to a second embodiment, when the valve is in the open position or when the valve is in the closed position.

Like this in 1 can be seen, is the valve 1 on a hydraulic accumulator 3 mounted, which in turn is intended to be installed on board a vehicle. This vehicle is for example a motor vehicle, such as a passenger car, a truck, a four-wheel drive vehicle, etc.

For example, it is integrated into a cycle for recovering the braking energy of this vehicle.

Such a circuit is for example in the patent application number FR 1254170 or FR 1257783 described.

The hydraulic accumulator 3 has a rigid housing 5 and a stretchy cladding 7 on that in the rigid case 5 is included. The housing 5 Inside, an interior bounded by the stretchable wrapping 7 in two chambers 9 . 11 is divided. The first chamber 9 is filled with a fluid, which is an oil here. The second chamber 11 is filled with a inert gas with thermodynamic characteristics that are compatible with the operation of the store. This gas is nitrogen here, but could also be helium.

In the illustrated example, the stretchable wrapper limits 7 a completely enclosed space, that of the second chamber 11 equivalent. He is with the exterior of the store 3 via a self-closing valve element 13 connected to the rigid housing 5 is attached.

• – einen Hohlkörper 15 mit einer Durchgangsleitung 17, die einen Einlass 19 und einen Auslass 21 aufweist, wobei der Einlass 19 für die Verbindung mit einer Öffnung 23 des Hydraulikspeichers vorgesehen ist;
• – ein Antiverdrängungsventil 25, das relativ zu dem Hohlkörper 15 beweglich ist zwischen einer Stellung zum Verschließen des Einlasses 19 und einer Stellung zum Freigeben des Einlasses 19;
• – ein Federelement 27, welches das Ventilelement 25 in seine Freigabestellung zurückstellt;
• – ein Steuerelement 29, das mit dem Ventilelement 25 verbunden ist und relativ zu dem Hohlkörper 15 selektiv beweglich ist zwischen einer ersten stabilen Stellung, in der das Steuerelement 29 das Ventilelement 25 in seiner Verschlussstellung blockiert, und einer zweiten stabilen Stellung, in der das Ventilelement 25 sich zwischen seiner Verschlussstellung und seiner Freigabestellung frei bewegt.

The shut-off valve 1 indicates:

• - A hollow body 15 with a transit line 17 that have an inlet 19 and an outlet 21 having, wherein the inlet 19 for connection with an opening 23 the hydraulic accumulator is provided;
• - an anti-displacement valve 25 relative to the hollow body 15 is movable between a position for closing the inlet 19 and a position for releasing the inlet 19 ;
• - A spring element 27 which is the valve element 25 returns to its release position;
• - a control 29 that with the valve element 25 is connected and relative to the hollow body 15 is selectively movable between a first stable position in which the control 29 the valve element 25 blocked in its closed position, and a second stable position in which the valve element 25 moves freely between its closed position and its release position.

The hollow body 15 is for example a solid part, made of plastic or metal. It is produced, for example, by plastic injection molding or by machining a metal part.

Like this in 2 can be seen is an evacuation valve 31 at the transit line 17 diverted to evacuate the line 17 to enable. The valve element 31 is rigid in a recess 33 of the hollow body 15 attached. It communicates with the passage on the one hand 17 ,

On the other hand, it has a neck, which can be coupled, for example with a vacuum pump.

The valve element 1 also has a counterflange 35 on, the attachment of the hollow body 15 on the rigid housing 5 allows the hydraulic accumulator.

Like this in 1 can be seen, is the peripheral edge of the opening 23 sealing between the hollow body 15 and the counterflange 35 trapped. The counterflange 35 is inside the first chamber 9 placed.

Like this in the 2 . 3 and 4 can be seen, the hollow body points 15 a central recess 36 into which the control 29 is inserted, and inlet and outlet pipes 37 . 38 on, wherein in each case the one the central recess 36 with the outlet 21 and the other with the inlet 19 combines.

The valve element 25 has a closure body 39 and a shaft 41 on. The closure body 39 has the general shape of a disc, wherein the shaft 41 extends from the center of one of the large areas of the disc. The closure body 39 is in the first chamber 9 the hydraulic accumulator used, wherein the shaft 41 successively the counterflange 35 and the inlet pipe 38 traversed and in the central recess 36 of the hollow body opens.

The valve element 25 moves between its closed position and its release position according to a translatory movement in a direction Y, in particular in the 3 and 4 is shown.

The counterflange 35 has a first large area 43 and a second large area 45 which are opposed to each other, the one to the interior of the first chamber 9 directed towards the other and to the hollow body 15 directed. He is from a central opening 47 interspersed, in which the shaft 41 the valve element is inserted. The central opening 47 leads the shaft 41 in his shift.

The counterflange 35 also has a plurality of peripheral openings 49 for the passage of oil on. The openings 47 and 49 enforce the mating flange completely. The openings 49 are on a circle around the central opening 47 distributed around.

The first big area 43 is designed to be a tight fit 51 generates the openings 49 surrounds. In the closed position of the valve element 25 comes the closure body 39 against the seal seat 51 to the concern, being at the same time the openings 49 and the opening 47 closes.

The second big area 45 the flange carries a central hump 53 coming from the openings 47 and 49 is enforced. The cusp 53 is in the inlet 19 the line 17 , with a sealing element arranged therebetween 55 used.

The feather 27 is a helical compression spring, which is between the mating flange 35 and the closure body 39 is arranged.

The control 29 is a tap ball with a generally cylindrical shape. The control 29 has a drive section 57 in the recess 36 of the hollow body is inserted and with the shaft 41 cooperates, and an operating section 59 , which protrudes from the hollow body, on.

The control 29 causes the drive of the valve element 25 in that it moves according to a rotational movement about an axis X, which is substantially perpendicular to the direction Y. The axis X is in particular in 2 to see. The recess 36 forms a bearing for the rotation of the control 29 , It has a generally cylindrical shape and has a diameter which is slightly larger than that of the section 57 ,

The section 57 is partially hollow and bounded inside a cam surface, which coincides with the shaft 41 the valve element cooperates to move this between its drive and release position. In particular, the section 57 inside a cavity 60 on, passing through an inner wall 61 is limited, at the cam surface 62 is provided. The section 57 has a circumferential slot 65 in the interior 60 opens into the shaft 41 is used. The end 67 of the shaft 41 that is the closure body 39 is opposite, is in the interior of the interior 60 inserted and forms a cam follower, with the cam surface 62 for the drive of the valve element 25 interacts.

The cam surface 62 has a first section 69 and a second section 71 on, which are substantially parallel to each other and through an elbow 73 are interconnected with a small radius of curvature.

The first stable position of the control 29 is in 4 shown. In this position, the cam follower acts 67 with the section 71 the cam surface together. This section is substantially perpendicular to the direction Y. The section 71 indicates a slight slope of the elbow 73 to an end 75 of the section 71 that the elbow 73 opposite. At the end 75 forms the inner wall 61 of the control has a curvature of substantially 90 °. In the first stable position is the cam follower 67 at the end 75 of the section 71 determined against the elbow.

The control 29 goes from its first stable position to its second stable position by a rotation of about 90 °, that is a quarter turn. In this position is the section 69 the cam surface is substantially perpendicular to the direction of movement Y of the valve element and acts with the cam follower 67 together. The section 69 is relatively more spaced from the axis of rotation X than the section 71 so that the closure body 39 the valve element in this second stable position not against the sealing seat 51 is pressed. The section 69 has a flattening 76 on, which is located next to the elbow. In the second stable position, the in 3 is shown, the cam follower 67 on the flattening 76 detected.

In this second stable position is the valve element 25 from its release position into its closed position movable, for example under the influence of an overpressure inside the first chamber 9 or by the force of the elastomeric membrane on the valve element. In this case, that's the end 67 of the cam follower forming shaft of the section 69 solved and is in the interior 60 driven.

The first and second positions of the control are referred to as stable positions for the following reasons.

If, by moving the control from its second stable position to its first stable position, a user interrupts the movement before making a quarter turn, the cam follower will 67 on the first section 71 , in the distance to the end 75 , positioned. Under the influence of the restoring force of the spring 27 exercises the cam follower 67 a moment on the control that allows it to turn until the cam follower moves along the section 71 up to the section 69 and more specifically to the flattening 76 slipped.

Likewise, when passing over from the first to the second stable position, the user does not make a full quarter turn, the spring element transmits a force in the direction Y on the cam follower 67 , which has a moment on the cam over the cam surface 29 generated to complete the rotational movement.

The fact that the elbow 73 that the first section 69 and the second section 71 interconnects, has a small radius of curvature, causes this elbow is very short and no stable position for the cam follower 67 offers. This slides under the action of the restoring force of the spring 27 either to the section 69 or to the section 71 out.

It can be seen that in the first closed position, the outlet pipe 37 is closed by a massive area of the control. In the second stable position, however, are the lines 37 and 38 over the slot 65 in fluid communication with each other.

Like this in 2 can be seen, assigns the control 29 a second circumferential slot 79 on, which limits the rotational movement of the control relative to the hollow body 15 is provided. For this purpose, the valve has a set screw 81 on that with the hollow body 15 is rigidly connected and in the second slot 79 is used. The slot 79 extends circumferentially over a quarter turn of the circumference of the control. In the first stable position of the control is the set screw 81 at one end of the slot 79 at the ready. In the second stable position is the set screw 81 against the other circumferential end of the second slot 79 at the ready. In particular, this ensures that the cam follower 67 can not escape from the cam surface.

The section 59 for actuating the tap ball has a mold cavity, which is provided for receiving a tool, for example a key with which the tap ball can be driven to rotate about the axis X.

Like this in 1 can be seen, has the valve element 25 opposite the stretchy cladding 7 an anti-displacement function. This serving 7 It can not stretch until it enters the inlet 19 entry. When it expands in an uncontrolled way, it comes to an end, that of the self-closing valve element 13 opposite, with the closure body 39 in contact and forces the valve element 25 against the seal seat 51 ,

The method for assembling the hydraulic accumulator provided with the shut-off valve according to the invention will now be described in detail, which in 1 is shown.

It is considered an initial situation where the hydraulic accumulator is empty and disconnected from the vehicle.

Filling the hydraulic accumulator 3 takes place in the workshop, that is before mounting on board the vehicle. For this purpose, first the control 29 placed in the second stable position. The first chamber 9 is thus brought into communication with the exterior of the hydraulic accumulator, through the passageway 17 therethrough. The outlet 21 the passageway is connected to an oil source, and the first chamber 9 is filled from the source through the passage line with oil. As soon as the first chamber 9 is filled with a suitable pressure, the control is brought into its first stable position. This is how the first chamber becomes 9 isolated from the transit line. The fluid can no longer escape from the first chamber.

Then the gas over the self-closing valve element 13 into the interior of the stretchy cladding 7 blown. The one with the valve 1 provided hydraulic accumulator 3 is then mounted on board the vehicle. As a variant, the stretchable wrapping 7 first filled with gas, and then the first chamber is filled with oil.

The outlet 21 the transit line is connected to the oil circuit of the vehicle, for example to the circuit for recovering braking energy. The evacuation valve 37 is connected to a suction element, for example with a vacuum pump.

The suction element is then started to remove the air from the passageway 17 to evacuate.

The transit line 17 is then filled with oil, which comes for example from a filling system.

Finally, the control is brought into its second stable position, whereby the first chamber 9 the hydraulic accumulator and the passage line 17 be brought into communication. If the user does not make a complete quarter turn by bringing the control from its first stable position to its second stable position, this control will not remain in an intermediate position. The restoring force of the spring, however, acts on the control element for rotation about the axis X, via the cam follower 67 that with the cam surface 62 interacts. The control 29 is forced to continue its rotation to the second stable position. This effect is achieved due to the shape of the cam surface.

A second embodiment of the invention will now be described with reference to the drawings 5 and 6 described in detail. Only the points by which this second embodiment differs from the first will be described in detail below.

Identical elements or elements ensuring the same functions in the two embodiments are designated by the same reference numerals.

In the second embodiment of the invention, the check valve does not have a counter flange which cooperates with the hollow body to clamp the peripheral edge of the opening of the hydraulic accumulator. The hollow body 15 is at one end of the rigid housing 5 attached with a sealing element disposed therebetween. The inlet 19 the transit line 17 flows directly into the first chamber 9 out.

The valve seat associated with the sealing seat 51 is directly on the hollow body 15 intended. The sealing seat is here annular and not conical, as in the embodiment in the 1 to 4 ,

The opening 47 for the translational guidance of the valve element is provided directly in the hollow body. The compression spring 27 is also not used between the counter flange and the closure body, but between the hollow body and the closure body.

Incidentally, the control is 29 no longer a rotatable cylindrical tap ball, but a lever that over the cam surface 62 against the hollow body 15 slides.

The control 29 Moves between its first and second stable position according to a general rotational movement relative to the hollow body 15 , in the course of which the lever against the hollow body 15 rolls, with the cam surface 62 slides against the outer surface of the hollow body, so that the lever does not move parallel to the outer surface.

The control 29 is completely outside the hollow body 15 , It has a cam part 83 and a handle part 85 , which is firmly connected to the cam part, on.

Like this in the 5 and 6 can be seen defines the outer surface of the cam member 83 the first section 69 and the second section 71 and the elbow 73 , The sections 69 and 71 be by the spring 27 in support against a support surface 87 reset the hollow body. The area 87 extends in a plane that is substantially perpendicular to the direction of movement Y of the valve member. For this purpose, the cam member 83 a bolt 89 on, in slotted holes 91 is inserted in the shaft 41 the valve element are provided. The long holes 91 are elongated in the direction Y

The first stable position is in 6 illustrated. In this position is the second section 71 the cam surface in support on the surface 87 of the hollow body. The bolt 89 is located at one end of the slot 91 that is the closure body 39 opposite. The handle part 85 is located in the extension of the shaft 41 , The distance between the bolt 89 and the section 71 is such that the closure body 39 against the restoring force of the spring 27 pressed against the sealing seat.

This second stable position is in 5 illustrated. In this position, the first section 69 the cam surface against the support surface 87 pressed. The distance between the bolt 89 and the section 69 is smaller than the distance between the bolt 89 and the section 71 , The bolt 89 is located at the end of the slots 91 that is the closure body 39 opposite. The closure body 39 is not pressed against the sealing seat.

In this position is the handle part 85 to the shaft 41 essentially vertical.

It should be noted that the shut-off valve 1 an element to block 93 having the lever in the second stable position. This organ is here a clamp that is rigid to the hollow body 15 is attached. The handle part 85 the lever locks into place with the clamp 93 in a detachable manner in the second stable position.

In the second stable position, the valve element can 25 move from its release position to its closed position. As a result, a shift in the slots 91 relative to the bolt 89 is effected.

In one embodiment, the cam member 83 two cheeks facing each other, with the bolt 89 extending from one cheek to the other. In a further embodiment, the shaft 41 two opposite cheeks, each cheek has a slot. The cam part 83 is inserted between the two cheeks and carries two pins 89 pointing in opposite directions to the cheeks and inserted in the slots. The pins define the bolt 89 ,

Claims (11)

Shut-off valve ( 1 ) for closing a hydraulic accumulator ( 3 ), whereby the valve ( 1 ) Comprises: a hollow body ( 15 ) with a transit line ( 17 ) for a fluid having an inlet ( 19 ) and an outlet ( 21 ), wherein the inlet ( 19 ) for connection to an opening ( 23 ) of the hydraulic accumulator ( 3 ) is provided; A valve element ( 25 ), which relative to the hollow body ( 15 ) is movable between a position for closing the inlet ( 19 ) and a position for releasing the inlet ( 19 ); A spring element ( 7 ), which the valve element ( 25 ) returns to its release position; characterized in that the valve ( 1 ) a control ( 29 ), which is connected to the valve element ( 25 ) and relative to the hollow body ( 15 ) is selectively movable between a first stable position in which the control ( 29 ) the valve element ( 25 ) blocked in the closed position, and a second stable position in which the valve element ( 25 ) moves freely between its closed position and its release position. Valve according to claim 1, characterized in that the control element ( 29 ) a cam surface ( 62 ), which is provided so that when the control ( 29 ) is brought into an intermediate position between its first and second stable position, the spring element ( 27 ) the control ( 29 ) moved to the second position. Valve according to claim 2, characterized in that the valve element ( 25 ) a closure body ( 39 ) and a shaft ( 41 ), which with the closure body ( 39 ) and with the control ( 29 ) cooperates. Valve according to one of claims 2 or 3, characterized in that the cam surface ( 62 ) a first section ( 69 ) and a second section ( 71 ) which are substantially perpendicular to each other and by an angle piece ( 73 ) are connected to a small radius of curvature. Valve according to one of claims 2 to 4, characterized in that the control ( 29 ) is a rotatable hammer ball, which in the hollow body ( 15 ) is inserted and has a rotation axis (X) which is to a direction (Y) of the movement of the valve element ( 25 ) is substantially perpendicular between its closing and releasing position. Valve according to claim 5, characterized in that the tap ball ( 29 ) is hollow, wherein the cam surface ( 62 ) on a radially inner surface of the hammer ball ( 29 ) is provided, wherein the valve element ( 25 ) a cam follower ( 67 ) provided with the cam surface ( 62 ) cooperates. Valve according to one of claims 2 to 4, characterized in that the control element ( 29 ) is a lever that over the cam surface ( 62 ) against the hollow body ( 15 ) slides. Valve according to claim 7, characterized in that a shaft ( 41 ) of the valve element ( 25 ) at least one slot ( 91 ), which is parallel to the shaft ( 41 ) is elongated, the lever having at least one bolt ( 89 ), which in the slot ( 91 ) is used. Valve according to claim 7 or 8, characterized in that it comprises a blocking element ( 93 ) of the lever in the second stable position. Arrangement with a hydraulic accumulator ( 3 ) and a shut-off valve ( 1 ) for the hydraulic accumulator ( 3 ) according to one of the preceding claims, wherein the hydraulic accumulator ( 3 ) a rigid housing ( 5 ) and an expandable sheath (incorporated in the rigid housing) ( 7 ), wherein the valve element ( 25 ) in the release position through the opening ( 23 ) into the interior of the rigid housing ( 5 protruding in order to prevent the stretchable sheath ( 7 ) into the inlet ( 19 ) penetrates. Method for mounting, on board a vehicle, a hydraulic accumulator ( 3 ), which is equipped with a shut-off valve ( 1 ) according to one of the preceding claims, the method comprising the following steps: - Spend the control ( 29 ) in its second stable position; - filling the hydraulic accumulator ( 3 ) with a fluid, through the passage line ( 17 through; - Spend the control ( 29 ) in its first stable position; - mounting the hydraulic accumulator ( 3 ) on board the vehicle and connecting the outlet ( 21 ) of the transit line ( 17 ) with a fluid circuit of the vehicle; - Spend the control ( 29 ) in its second stable position.

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