DE102022120325A1 - Bidirectional valve device for a pneumatic and/or hydraulic system and method for operating a bidirectional valve device - Google Patents

Abstract

A bidirectional valve device (100) for a pneumatic and/or a hydraulic system comprises a bidirectionally movable pin (105) with a channel (110) for guiding a fluid, the pin (105) having a sleeve section (115) and an adjacent spring section ( 120), wherein the pin (105) in the sleeve section (115) has at least one transverse opening (125), a movable sleeve (135) which is shaped to close the transverse opening (125) in a first sleeve position (140) and in order to at least partially release the transverse opening (125) in a second sleeve position, a spring element (145) arranged in the spring section (120) which rests on the sleeve (135), the spring element (145) being between the sleeve (135) and the pin (105) is biased so that in a rest position the sleeve (135) closes the transverse opening (125), and a housing (150) with a first fluid chamber (155) and with a second fluid chamber (160) which is connected via the pin (105 ) and the sleeve (135) can be fluidly connected.

Description

The present approach relates to a bidirectional valve device for a pneumatic and/or a hydraulic system and a method for operating a bidirectional valve device.

Hydraulic and pneumatic systems can be used in a variety of areas and require appropriate components, such as valves, for reliable operation.

Against this background, the object of the present approach is an improved bidirectional valve device for a pneumatic and/or a hydraulic system and an improved method for operating a bidirectional valve device. to accomplish.

This object is achieved by a bidirectional valve device with the features of device claim 1 and by a method according to claim 9.

The approach presented can relate to a bidirectional valve, which is advantageously inexpensive to manufacture because it consists of few parts and is therefore significantly easier to manufacture. Furthermore, the approach presented and the components required can also be used to modify the size of the valve, so that new, efficient installation options can arise. The valve can also be installed not only radially, but also axially, which can result in several mounting options, including in a line or in a drive cylinder.

A bidirectional valve device for a pneumatic and/or a hydraulic system is presented, wherein the bidirectional valve device has a movable pin with a channel for guiding a fluid through the pin, with a sleeve portion and with a spring portion adjacent to the sleeve portion, the pin in the sleeve section has at least one blind hole and a transverse opening or a smaller cross section than a bore in the sleeve. Furthermore, the bidirectional valve device has the sleeve arranged in the sleeve section of the pin and movable along the pin, which is shaped to close the transverse opening in a first sleeve position or to seal the pin against the sleeve and to partially or completely close the transverse opening in a second sleeve position to release or to release a fluid flow opening between the pin and the sleeve, as well as a spring element arranged in the spring section and connected to the sleeve. The spring element is prestressed between the sleeve and the pin, so that in a rest position the sleeve closes the transverse opening.

Optionally, the valve device has a housing with a first fluid chamber and with a second fluid chamber, wherein the first fluid chamber and the second fluid chamber can be fluidically connected via the, for example, hollow-drilled pin and the sleeve.

The valve device can be formed, for example, as a bidirectional pressure relief valve that can be used for pneumatic and/or hydraulic applications. Accordingly, the fluid can be, for example, a liquid or a gas that can pass through the valve device and regulate the pressure of the fluid. The valve device can advantageously be used variably, for example in a valve block, with a screw-in sleeve or as a screwable hexagonal valve. The pin can be hollow drilled. It is also possible to use a pin with a diameter that is smaller than the inner diameter of the sleeve. This means that the pin does not need to be hollow-bored and the fluid can still flow from one chamber into the other via a controllable seal between the pin and the sleeve. The at least one transverse opening can also be referred to as a transverse bore and can advantageously be arranged at right angles to the channel and be connected to it. Advantageously, the fluid can be supplied to the channel or removed from the channel as long as the sleeve, which is displaced by the pressure and releases the transverse opening, or the pin is pushed away from its rest position. The sleeve can, for example, also be referred to as a closure element and can advantageously be arranged on the lateral surface of the pin in the sleeve section. The sleeve can, for example, also be shaped like a cylinder and can be moved or displaced along a main axis of extension of the pin under, for example, the action of pressure. The spring element can be formed, for example, as a compression spring, which can be connected to the sleeve and prestressed between the sleeve and the pin in order to advantageously be able to apply pressure to the sleeve and thus close the transverse opening. The pin with the sleeve and the spring element can be surrounded by the housing, whereby the first and second fluid chambers can advantageously be formed. This means that the fluid chambers can be formed, for example, as cavities in the housing. Advantageously, the first fluid chamber can be arranged in the area of the sleeve section and the second fluid chamber in the area of the spring section. Advantageously, due to the small number of components, the valve can Manufacturing costs can be reduced and construction simplified.

According to one embodiment, the pin can have a support element or an adjusting nut in the spring section, which can be shaped to support the spring element on the pin, in particular wherein the spring element can be prestressed between the support element and the sleeve. The support element can be designed, for example, as a threaded nut. Additionally, a washer can be attached between the support element/adjusting nut and the spring. Advantageously, the spring element can be tensioned by tightening the adjusting nut. As a result of which a compressive force acts on the sleeve and a tensile force of the same magnitude acts on the pin.

Furthermore, according to another embodiment, a housing with a first fluid chamber and a second fluid chamber can be provided, wherein the first fluid chamber and the second fluid chamber can be fluidly connected via the pin and the sleeve. The housing may only be necessary if the valve device is of block construction. The preloaded valve pack can also be inserted into a bore/line without a housing to separate the two pressure chambers. Such an embodiment of the approach presented here offers the advantage that a very compact valve device can be created, which can be installed even with little available installation space.

The sleeve can have a collar that is connected to the spring element. Additionally or alternatively, the collar can be shaped to limit a movement path of the sleeve in the direction of the first fluid chamber and/or to install a spring that is larger in diameter than the sleeve. The collar can, for example, be shaped as a holding projection, so that a side wall of the sleeve can advantageously be realized in an L-shape. The collar can therefore represent the short L side and the rest of the sleeve, which can contact the lateral surface of the pin, the long L side, whereby the sleeve can advantageously be secured in its position.

Furthermore, the pin in the spring section can have at least one further transverse opening (which is particularly helpful in the case of a block design of the valve device) in order to admit the fluid into the channel and additionally or alternatively to let it out of the channel. The further transverse opening can advantageously be realized parallel to the transverse opening in the sleeve section. The axial opening or hollow bore in the pin can advantageously be arranged on an end face of the pin. More specifically, the axial opening can merge directly into the channel of the pin, so that the fluid can flow directly into or out of the channel. The axial opening can also be arranged on the main axis of extension of the pin. Furthermore, the further transverse opening can also be referred to, for example, as a radial opening with respect to the main axis of extension.

According to one embodiment, the sleeve may have a sealing groove for receiving a sealing element for sealing the first fluid chamber from the second fluid chamber. The sealing element can be arranged in particular between the sleeve and a housing wall of the housing. In order to ensure or be able to ensure a tightness of the valve, the valve device has the sealing element. The sealing element can be formed, for example, as a sealing ring/piston seal, which can be arranged or can be arranged in the sealing groove of the sleeve. The sealing groove can be formed as a recess in the sleeve.

It is also possible to design the valve without a sealing element/O-ring. In particular, a throttle area can be provided between an outer wall of the sleeve and an inner wall of the housing, which has a smaller cross section than another area between the outer wall of the sleeve and the inner wall of the housing. Such an embodiment has the advantage that the valve also has the function of a throttle, since this allows a defined amount of fluid to pass through the valve if the sleeve and the bore for the sleeve are designed as a fit.

Furthermore, the first fluid chamber can have a smaller diameter than the second fluid chamber, whereby a spring can be installed which is larger in diameter than the sleeve. Additionally or alternatively, the pin on a side of the sleeve section opposite the spring section can have a larger diameter than in the spring section , in particular the pin can be shaped like a truncated cone in the area of the larger diameter.

Advantageously, the frustoconical region can also be shaped to seal the valve via the cone. In addition, for example, the flow of force runs via the cone tip of the pin into the sleeve, whereby the valve spring can be preloaded by tightening the support element/adjusting nut. The cone shape has the function of sealing the valve. In addition, the valve package can be preloaded on the pin due to the cone shape, as the cone is supported on the edge of the inner sleeve bore.

According to one embodiment (block construction), the pin may be configured to abut a wall of the second fluid chamber when the sleeve is movable toward the second fluid chamber to expose the transverse opening. Advantageously, the wall can function as a holding element so that the flow of force is diverted into the housing/valve block.

The pin can have a locking groove for receiving a locking element or the pin can be threaded and the locking element/adjusting nut can be screwed on. This makes the valve adjustable as the preload force of the spring can be adjusted by tightening a single nut. The securing groove can be formed, for example, as a recess in which the securing element, for example a securing ring, can be arranged. The securing groove can be made like a ring in the lateral surface of the pin.

Furthermore, according to one embodiment, the end face of the sleeve can be the same size as the cross-sectional area of the inner bore. In this way, a deflection of the pin or the sleeve can advantageously be achieved at the same pressure level, so that the bidirectional switching valve switches through in each of the directions starting from the same pressurization. When the pressure is present in the first chamber, the fluid, or the pressure of the fluid, acts against the pressure projection surface, which corresponds to the end face of the sleeve. If the permissible pressure and thus the spring preload force is exceeded, the sleeve is pushed away and the valve opens/switches, allowing the fluid to escape into the second chamber. So that the valve opens/switches in the other direction, the pressure in the second chamber acts on the pressure projection area, which corresponds to the cross-sectional area of the hole in the sleeve. If the permissible pressure and thus the spring force is exceeded, the pin is pushed out of the sleeve and the valve opens/switches, allowing the fluid to escape into the first chamber. Since the two pressure projection surfaces are the same size, the valve opens/switches in both directions when the same pressure is reached.

Furthermore, a method for operating a bidirectional valve device is presented in a variant mentioned above, the method comprising a step of admitting the fluid into the first fluid chamber or into the second fluid chamber and a step of transferring the sleeve from the first sleeve position to the second sleeve position Use of the fluid includes to open the at least one transverse opening.

The method allows the valve device to advantageously be operated bidirectionally. This means that the fluid can advantageously be introduced from both the first fluid chamber and the second fluid chamber.

Advantageously, the transverse opening can be opened and the fluid can flow out of the channel into the first fluid chamber.

• 1 eine schematische Schnittdarstellung einer bidirektionalen Ventilvorrichtung gemäß einem Ausführungsbeispiel;
• 2 eine schematische Darstellung eines Ausführungsbeispiels eines Ventilverbunds einer bidirektionalen Ventilvorrichtung;
• 3 eine schematische Schnittdarstellung eines Ausführungsbeispiels eines Ventilverbunds einer bidirektionalen Ventilvorrichtung;
• 4 eine schematische Schnittdarstellung eines Stifts gemäß einem Ausführungsbeispiel für eine bidirektionale Ventilvorrichtung;
• 5 eine schematische Schnittdarstellung einer Hülse gemäß einem Ausführungsbeispiel für eine bidirektionale Ventilvorrichtung;
• 6 eine schematische Schnittdarstellung eines Stützelements gemäß einem Ausführungsbeispiel für eine bidirektionale Ventilvorrichtung;
• 7 eine schematische Schnittdarstellung eines Ausführungsbeispiels einer bidirektionalen Ventilvorrichtung;
• 8 eine schematische Schnittdarstellung eines Ausführungsbeispiels einer bidirektionalen Ventilvorrichtung;
• 9 eine schematische Schnittdarstellung eines Ausführungsbeispiels einer bidirektionalen Ventilvorrichtung;
• 10 eine schematische Schnittdarstellung eines Ausführungsbeispiels einer bidirektionalen Ventilvorrichtung;
• 11 eine schematische Schnittdarstellung eines Ausführungsbeispiels einer bidirektionalen Ventilvorrichtung;
• 12 eine schematische Schnittdarstellung eines Ausführungsbeispiels einer bidirektionalen Ventilvorrichtung;
• 13 eine schematische Schnittdarstellung eines Ausführungsbeispiels einer bidirektionalen Ventilvorrichtung;
• 14 eine schematische Schnittdarstellung eines Ausführungsbeispiels einer bidirektionalen Ventilvorrichtung; und
• 15 ein Ablaufdiagramm eines Ausführungsbeispiels eines Verfahrens zum Betreiben einer bidirektionalen Ventilvorrichtung.

Exemplary embodiments of the approach presented here are explained in more detail in the following description with reference to the figures. Show it:

• 1 a schematic sectional view of a bidirectional valve device according to an exemplary embodiment;
• 2 a schematic representation of an exemplary embodiment of a valve assembly of a bidirectional valve device;
• 3 a schematic sectional view of an exemplary embodiment of a valve assembly of a bidirectional valve device;
• 4 a schematic sectional view of a pin according to an embodiment of a bidirectional valve device;
• 5 a schematic sectional view of a sleeve according to an exemplary embodiment of a bidirectional valve device;
• 6 a schematic sectional view of a support element according to an exemplary embodiment of a bidirectional valve device;
• 7 a schematic sectional view of an exemplary embodiment of a bidirectional valve device;
• 8th a schematic sectional view of an exemplary embodiment of a bidirectional valve device;
• 9 a schematic sectional view of an exemplary embodiment of a bidirectional valve device;
• 10 a schematic sectional view of an exemplary embodiment of a bidirectional valve device;
• 11 a schematic sectional view of an exemplary embodiment of a bidirectional valve device;
• 12 a schematic sectional view of an exemplary embodiment of a bidirectional valve device;
• 13 a schematic sectional view of an exemplary embodiment of a bidirectional valve device;
• 14 a schematic sectional view of an exemplary embodiment of a bidirectional valve device; and
• 15 a flowchart of an exemplary embodiment of a method for operating a bidirectional valve device.

In the following description of favorable exemplary embodiments of the present approach, the same or similar reference numerals are used for the elements shown in the various figures and having a similar effect, with a repeated description of these elements being omitted.

1 shows a schematic sectional view of a bidirectional valve device 100 according to an exemplary embodiment. The valve device 100 can be used, for example, in a pneumatic and/or hydraulic system as a pressure relief valve. For this purpose, it has a bidirectionally movable pin 105 with a channel 110 for guiding a fluid through the pin 105. The pin 105 in turn has a sleeve section 115 and a spring section 120 adjacent to the sleeve section 115. In the sleeve section 115, the pin 105 has at least one transverse opening 125, which is designed, for example, to let the fluid into or out of the channel 110. The pin 105 is, for example, arranged to be movable along its main axis of extension 130. The bidirectional valve device 100 further has a sleeve 135 arranged in the sleeve section 115 of the pin 105 and movable along the pin 105, which is shaped to close the transverse opening 125 in a first sleeve position 140 and to at least partially close the transverse opening 125 in a second sleeve position to release. In other words, the sleeve 135 is arranged on a lateral surface 142 of the pin 105. In the spring section 120, a spring element 145, for example a spring, is connected to the sleeve 135 and prestressed between the sleeve 135 and the pin 105, so that in a rest position the sleeve 135 closes the transverse opening 125. The valve device 100 further has an optional housing 150 with a first fluid chamber 155 and a second fluid chamber 160, the first fluid chamber 155 and the second fluid chamber 160 being fluidically connectable or connected via the pin 105 and the sleeve 135. The fluid chambers 155, 160 are formed, for example, as cavities in the housing 150. The valve device 100 can be implemented, for example, as a valve block, as a screw-on hexagonal valve or, for example, with a screw-in housing. According to this exemplary embodiment, however, the valve device is shaped like a block. Only optionally does the valve device 100 according to this exemplary embodiment have a closure element 165 which is shaped to close the second fluid chamber 160. The closure element 165 is, for example, shaped like a plug and can also optionally be fixed to the housing 150.

However, it is also conceivable that in an alternative embodiment the pin 105 does not have a hollow bore or axial openings, but rather has a smaller cross section than the inner diameter of the sleeve 135. This results in a free space between the sleeve 135 and the pin 105, which can also be used to guide a fluid from the first fluid chamber 155 to the second fluid chamber 160. A sealing area between a head of the pin 105 and the sleeve 135 can then have the same function as the transverse opening 125.

According to the 1 In the exemplary embodiment shown in more detail, the pin 105 in the spring section 120 has a support element 170 shaped, for example, as a flange and/or washer. The support element 170 is shaped to support the spring element 145 on the pin 105. More specifically, according to this exemplary embodiment, the spring element 145 is biased between the sleeve 135 and the support element 170, so that the spring element 145 exerts pressure on the sleeve 135 in the direction of the first fluid chamber 155. If, for example, the fluid is admitted into the pin from the first fluid chamber 155, the support element 170 touches the closure element 165, since the pin 105 together with the sleeve 135 is initially pressed onto the closure element 165. Only then is the sleeve 135 moved individually and the transverse opening 125 is released. This therefore means that the pin 105 is designed to rest against a wall of the second fluid chamber, for example the closure element 165, when the sleeve 135 is movable in the direction of the second fluid chamber 160 in order to release the transverse opening 125.

A side wall of the support element 170 is, for example, L-shaped and, according to this exemplary embodiment, resembles the shape of the sleeve 135, which here also has an L-shaped side wall. The short side of the L forms a collar 175 which is connected to the spring element 145 and/or which is shaped to limit a movement path of the sleeve 135 in the direction of the first fluid chamber 155. This is possible because the housing 150 is shaped like a step at a transition from the first fluid chamber 155 to the second fluid chamber 160 and the collar 175 engages on this step. In other words, the fluid chambers 155, 160 are common sam a bottle-shaped interior of the housing 150, with the “bottle neck” representing the first fluid chamber 155 and the “bottle belly” representing the second fluid chamber 160. In other words, the first fluid chamber 155 has a smaller diameter than the second fluid chamber 160. Additionally or alternatively, the pin 105 has a larger diameter on a side of the sleeve section 115 opposite the spring section 120 than in the spring section 120, in particular where the pin 105 is in the area of the larger diameter has a frustoconical head 177 and thus becomes wider away from the sleeve 135.

Only optionally does the pin 105 have at least one further transverse opening 180 and/or an axial opening 185 in the spring section. The openings 180, 185 are shaped in order to admit the fluid into the channel 110 and/or to let it out of the channel 110, just like the transverse opening 125. Furthermore, the sleeve 135 according to this exemplary embodiment has a sealing groove 190 for receiving a sealing element 195. The sealing element 195 is designed to seal the first fluid chamber 155 from the second fluid chamber 160. The sealing element 195 is also optionally arranged between the sleeve 135 and a housing wall of the housing 150. The sealing groove 190 is arranged circumferentially around the sleeve 135, so that the sealing element 195 is formed, for example, as a sealing ring. Overall, the bidirectional valve device 100 has two connections 196 through which the fluid is admitted into one of the fluid chambers 155, 160 and drained from the other of the chambers 155, 160. According to this exemplary embodiment, the connections 196 are arranged on a common side of the valve device 100. Alternatively, the connections 196 can also be implemented differently, as long as one of the connections 196 is coupled to the first fluid chamber 155 and the other of the connections 196 to the second fluid chamber 160. Since the valve device 100 functions bidirectionally, the valve device 100 can be arranged flexibly. Furthermore, the valve device 100 is, for example, elongated, so that it can also be installed in, for example, a piston of a drive cylinder in order to divert the pressure from one pressure chamber directly into the other.

According to a further exemplary embodiment, the pin 105 and the sleeve are also shaped in such a way that the end _face A of the sleeve 135 is the same size as the cross-sectional area of the inner bore _A of the pin 105. This allows the valve device 100 to be designed in such a way that it has the same size Pressure can switch in either of the two bidirectional directions.

In other words, a bidirectional pressure relief valve is described here, which can be used in both pneumatics and hydraulics. For example, the valve device 100 can be installed axially in a fluid line, in a piston of a cylinder or, for example, in a deep hole that connects two pressure chambers.

The spring element 145 is formed, for example, as a compression spring, which is biased to a defined force in the assembled state. Since the projection surfaces on which the pressure acts are the same, the valve opens in both directions when the permissible pressure is exceeded. The fluid can thus flow directly into the unpressurized fluid chambers 155, 160.

2 shows a schematic representation of an exemplary embodiment of a valve assembly 200 of a bidirectional valve device. The valve assembly 200 shown here can be used, for example, for a bidirectional valve device, as shown in, for example 1 was described. According to this exemplary embodiment, it also has the pin 105, the sleeve 135 as well as the spring element 145 and the support element 170. Only the housing is not shown in this exemplary embodiment. According to this exemplary embodiment, the support element 170 is shown as a disk which has two opposing flat edges and two opposing curved edges. In the sleeve section 115, the pin 105 has a frustoconical area or head 177 on one end face, so that movement of the sleeve 135 is limited.

3 shows a schematic sectional view of an exemplary embodiment of a valve assembly 200 of a bidirectional valve device. The valve assembly 200 shown here corresponds, for example, to that in 2 described valve assembly 200. According to this exemplary embodiment, the pin 105, more precisely the support element 170, has a securing groove 300 for receiving a securing element, such as a securing ring. According to this exemplary embodiment, the pin 105 has the transverse opening 125 and the axial opening 185, which leads into the channel 110.

4 shows a schematic sectional view of a pin 105 according to an exemplary embodiment of a bidirectional valve device. The pen 105 corresponds to or is similar to, for example, the pen 105 which is used in at least one of the 1 to 3 was described. Here the sift 105 has the securing groove 300. While the channel 110 according to this exemplary embodiment has a uniform diameter and is therefore evenly distributed runs, the pin 105 has a gradation 400 on its lateral surface as a play adjustment to the sleeve. The pin 105 also has a further gradation 405 in the area of the securing groove 300, which is shaped, for example, as a stopper for the support element.

In other words, the pin 105 is hollow-drilled and has a transverse bore described here as a transverse opening 125 at one end. At the same end, the pin 105 also has a conical surface, which has been described as a truncated cone-shaped head 177 or can be referred to as a ring rest. The valve device is sealed via this conical surface 177 and the sleeve 135. In an alternative embodiment of the valve, the conical surface 177 is omitted. According to this exemplary embodiment, at the other end of the pin 105 it has a seat for the disk, which was described here as a further step 405, and the locking groove 300 for the locking ring. At the large diameter, that is, in the sleeve section 115, the pin 105 has a clearance fit to the sleeve.

5 shows a schematic sectional view of a sleeve 135 according to an exemplary embodiment of a bidirectional valve device. The sleeve 135 corresponds, for example, to that in at least one of the 1 to 3 Sleeve 135 described and can be connected or connected, for example, to a pin, as shown in 4 was described. The sleeve 135 is, for example, cylindrical and has the sealing groove 190. According to this exemplary embodiment, the sleeve 135 also has a clearance fit on the outside diameter and a clearance fit on the inside diameter.

6 shows a schematic sectional view of a support element 170 according to an exemplary embodiment of a bidirectional valve device. According to this exemplary embodiment, the support element 170 is shaped as a disk and can be used, for example, for a valve device, as used, for example, in at least one of the 1 to 3 was described. According to this exemplary embodiment, the disk has two milling edges 600 so that, for example, oil can flow out in a spring chamber when the spring is compressed. In the middle, the support element 170 has, for example, a through opening 605, which is designed, for example, to push the support element 170 onto the pin.

7 shows a schematic sectional view of an exemplary embodiment of a bidirectional valve device 100. The valve device 100 shown here is similar, for example, to that in at least one of the 1 to 3 Valve device 100 described. According to this exemplary embodiment, the transverse opening 125 is closed and thus the first sleeve position 140 is shown.

8th shows a schematic sectional view of an exemplary embodiment of a bidirectional valve device 100. The valve device 100 shown here is similar, for example, to that in at least one of the 1 to 3 and/or 7 described valve device 100. Here the valve device 100 is shown in connection with a valve block and has the closure element 165 for closing the housing 150. The fluid chambers 155, 160 are arranged in front of and behind the pin 105 and are each connected to a connection 196.

9 shows a schematic sectional view of an exemplary embodiment of a bidirectional valve device 100. The valve device 100 shown here is similar, for example, to that in at least one of the 1 to 3 and/or 7 to 8 described valve device 100. Here the valve device 100 is shown only as a screwable hexagonal valve.

10 shows a schematic sectional view of an exemplary embodiment of a bidirectional valve device 100. The valve device 100 shown here is similar, for example, to that in at least one of the 1 to 3 and/or 7 to 9 described valve device 100. Since the bidirectional valve device 100 opens and closes in two directions under pressure, the valve device 100 according to this exemplary embodiment has a first projection surface 1000 and a second projection surface 1005, which are of the same size. Because the projection surfaces 1000, 1005 are the same size, the same pressure value is required so that the sleeve 135 is moved and the valve opens. According to this exemplary embodiment, the first projection surface 1000 is arranged on an end face of the sleeve 135. The second projection surface 1005 is arranged on a connecting element 1010, which connects the sleeve 135 and the spring element 145 to one another.

In other words, the prestressed package consisting of pin 105, sleeve 135, spring element 145 and optional support element 170 as a disk is inserted into the housing 150 and fixed with a locking ring. The projection surfaces 1000, 1005 on which the pressure acts are the same size. In the 0 position the valve, more precisely the transverse opening 125, is closed. No fluid can then flow through the pin 105. When the pressure at which the valve switches is reached, the sleeve 135, which is supported by the spring element 145, is pressed into the housing 150 and the transverse opening 145 is released.

11 shows a schematic sectional view of an exemplary embodiment of a bidirectional valve device 100. The valve device 100 shown here is similar or corresponds, for example, to that in at least one of the 1 to 3 and/or 7 to 10 described valve device 100. According to this exemplary embodiment, however, the transverse opening 125 is open and thus a second sleeve position 1100 is represented, so that the fluid can flow out of or into the channel 110.

In other words, the pin 105 is pushed outwards when the pressure at which the valve should switch is reached. The support element 170, for example, compresses the spring element 145. The sleeve 135 rests, for example, on the locking ring in the housing 150 and the valve opens.

12 shows a schematic sectional view of an exemplary embodiment of a bidirectional valve device 100. The valve device 100 shown here is similar or corresponds, for example, to that in at least one of the 1 to 3 and/or 7 to 11 described valve device 100. Here too, the transverse opening 125 is released.

According to this exemplary embodiment, in other words, the pressure is on the left side, or from the first fluid chamber, so that the sleeve 135 is pushed away and the fluid passes through the transverse opening 125 in the pin 105 into the second fluid chamber.

13 shows a schematic sectional view of an exemplary embodiment of a bidirectional valve device 100. The valve device 100 shown here is similar or corresponds, for example, to that in at least one of the 1 to 3 and/or 7 to 12 described valve device 100. Here too, the transverse opening 125 is at least partially released.

14 shows a schematic sectional view of an exemplary embodiment of a bidirectional valve device 100. The valve device 100 shown here is similar or corresponds, for example, to that in at least one of the 1 to 3 and/or 7 to 13 described valve device 100, in particular the one in 13 . Here too, the transverse opening 125 is at least partially released.

According to this exemplary embodiment, in other words, the pressure is on the right side, or from the second fluid chamber, so that the pin 105 is pressed outwards and the fluid enters the first fluid chamber through, for example, the axial opening 185.

15 shows a flowchart of an exemplary embodiment of a method 1500 for operating a bidirectional valve device. The method 1500, for example, operates a bidirectional valve device, as in at least one of the 1 to 3 and/or 7 to 14 was described. The method 1500 includes a step 1505 of admitting the fluid into the first fluid chamber or into the second fluid chamber and a step 1510 of transferring the sleeve from the first sleeve position to the second sleeve position using the fluid to open the at least one transverse opening. As a result, the fluid is, for example, admitted into the channel from the first fluid chamber or discharged from the channel into the first fluid chamber. For example, in step 1510 of transferring from the first sleeve position to the second sleeve position, the sleeve is transferred when a pressure of the fluid exceeds a pressure threshold.

According to this embodiment, in step 1505 of inlet, the fluid is admitted into the second fluid chamber and in step 1510 of transfer, the pin is moved towards the first fluid chamber in order to transfer the sleeve from the first sleeve position to the second sleeve position. Additionally or alternatively, for example, in step 1505 of admission, the fluid is admitted into the first fluid chamber and in step 1510 of transfer, the pin and the sleeve are moved in the direction of the second fluid chamber before transferring the sleeve from the first sleeve position to the second sleeve position, so that, for example, the fluid acts on the pin and on the sleeve to open the transverse opening.

The process steps presented here can be carried out repeatedly and in an order other than that described.

If an exemplary embodiment includes an “and/or” link between a first feature and a second feature, this should be read as meaning that the exemplary embodiment, according to one embodiment, has both the first feature and the second feature and, according to a further embodiment, either only that first feature or only the second feature.

REFERENCE SYMBOL LIST

100

bidirectional valve device

105

Pen

110

channel

115

sleeve section

120

Spring section

125

Cross opening

130

Main axis of extension

135

sleeve

140

first sleeve position

142

Lateral surface

145

Spring element

150

Housing

155

first fluid chamber

160

second fluid chamber

165

Closure element

170

Support element

175

collar

177

frustoconical head

180

further transverse opening

185

Axial opening

190

sealing groove

195

Sealing element

196

Connection

200

Valve assembly

300

locking groove

400

gradation

405

further gradation

600

milling edge

1000

first projection surface

1005

second projection surface

1100

second sleeve position

1500

Method for operating a bidirectional valve device

1505

Step of admission

1510

step of transferring

Claims (13)

Bidirectional valve device (100) for a pneumatic and/or a hydraulic system, the bidirectional valve device (100) having the following features: - a movable pin (105) with a channel (110) for guiding a fluid through the pin (105), the pin (105) having a sleeve section (115) and a spring section (120) adjacent to the sleeve section (115), wherein the pin (105) in the sleeve section (115) has at least one blind hole or a transverse opening (125) or a smaller cross section than a bore of a sleeve; - the sleeve (135) arranged in the sleeve section (115) of the pin (105) and movable along the pin (105), which is shaped to close the transverse opening (125) in a first sleeve position (140) or to close the pin (105 ) to seal against the sleeve (135) and to at least partially release the transverse opening (125) or to release a fluid flow opening between the pin (105) and the sleeve (135) in a second sleeve position (1100); and - a spring element (145) arranged in the spring section (120), which is connected to the sleeve (135), the spring element (145) being prestressed between the sleeve (135) and the pin (105), so that the sleeve is in a rest position (135) closes the transverse opening (125). Bidirectional valve device (100) according to Claim 1 , wherein the pin (105) in the spring section (120) has a support element (170) or an adjusting nut which is shaped to support the spring element (145) on the pin (105), in particular wherein the spring element (145) between the support element (170) or the adjusting nut and the sleeve (135) is preloaded. Bidirectional valve device (100) according to one of the preceding claims, wherein a housing (150) is provided with a first fluid chamber (155) and with a second fluid chamber (160), the first fluid chamber (155) and the second fluid chamber (160) being above the pin (105) and the sleeve (135) can be fluidly connected. Bidirectional valve device (100) according to Claim 3 , wherein the sleeve (135) has a collar (175) which is connected to the spring element (145) and / or wherein the collar (175) is shaped to allow a movement path of the sleeve (135) in the direction of the first fluid chamber (155 ) and/or to install a spring that is larger in diameter than the sleeve. Bidirectional valve device (100) according to one of the preceding claims, wherein the pin (105) in the spring section (120) has at least one further transverse opening (180) and an axial opening or hollow bore (185) which is or are formed to admit the fluid into the Channel (110) to enter and / or to leave the channel (110). Bidirectional valve device (100) according to one of the preceding claims, wherein the sleeve (135) has a sealing groove (190) for receiving a sealing element (195) for sealing the first fluid chamber (155) from the second fluid chamber (160), in particular wherein the sealing element (195) is arranged between the sleeve (135) and a housing wall of the housing or a lateral surface of a bore (150). Bidirectional valve device (100) according to one of the preceding claims, wherein between an outer wall of the sleeve (135) and an inner wall of the housing (150) there is a throttle area which has a smaller cross section than another area between the outer wall of the sleeve (135 ) and the inner wall of the housing (150). A bidirectional valve device (100) according to any one of the preceding claims, wherein the pin (105) has a cone shape or cone tip at an end which is not drilled through. Bidirectional valve device (100) according to one of the preceding claims, wherein the pin (105) has a locking groove (300) for receiving a locking element or wherein the pin has a thread to adjust a biasing force of the spring by tightening an adjusting nut to be screwed onto the thread . Bidirectional valve device (100) according to one of the preceding claims, wherein the end face of the sleeve is the same size as the cross-sectional area of the inner bore. Method (1500) for operating a bidirectional valve device (100) according to one of the preceding claims, wherein the method (1500) comprises the following steps: - Inlet (1505) of the fluid into the first fluid chamber (155) or into the second fluid chamber (160); and - Transferring (1510) the sleeve (135) from the first sleeve position (140) to the second sleeve position (1100) using the fluid to open the at least one transverse opening (125). Procedure (1500) according to Claim 11 , wherein in step (1505) of admitting the fluid is admitted into the second fluid chamber (160), and wherein in step (1510) of transferring the pin (105) is moved towards the first fluid chamber (155) to close the valve open. Method (1500) according to one of Claims 11 until 12 , wherein in step (1505) of admitting the fluid is admitted into the first fluid chamber (155), and wherein in step (1510) of transferring before transferring the sleeve (135) from the first sleeve position (140) to the second sleeve position ( 1100) and the sleeve (135) are moved towards the second fluid chamber (160) to open the valve.

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