valve

Abstract

A valve (1) has a drive cylinder (2) and a piston (3) movably supported in the drive cylinder (2), wherein at least one cylinder working chamber (4, 5) capable of applying a pressure medium is constructed in the drive cylinder (2) on at least one side of the piston (3), and a conduit (6, 7) of the valve (1) extends into the cylinder working chamber (4, 5), wherein the valve (1) has a shut-off element (8) adjustable between a shut-off position and a venting position for closing the conduit (6, 7), wherein in the shut-off position of the shut-off element (8), the pressure medium is closed in the cylinder working chamber (4, 5); in the venting position of the shut-off element (8), the pressure medium can flow through the conduit (6, 7).

Description

Technical Field

[0001] The present invention relates to a valve according to the preamble of claim 1. Background Technology

[0002] Various valve designs with corresponding actuating cylinders are known in the prior art. These actuating cylinders and the pistons that can be slidably disposed therein are typically used to reciprocate the valve's closing member (e.g., the valve disc).

[0003] These types of valves require regular maintenance. Summary of the Invention

[0004] The object of the present invention is to further improve the valve of the above type, so that, for example, accidental actuation of the valve can be prevented when performing maintenance work.

[0005] Therefore, the present invention proposes a valve according to claim 1.

[0006] Therefore, according to the present invention, the valve has a shut-off element for closing the pipeline that can be adjusted between a shut-off position and a conduction position, wherein, in the shut-off position of the shut-off element, the pressure medium is sealed within the working chamber of the cylinder; and in the conduction position of the shut-off element, the pressure medium can flow through the pipeline.

[0007] By means of the shut-off element according to the invention, the pressure medium can be confined within the working chamber of the cylinder. This prevents the piston from moving further within the drive cylinder, thus preventing accidental actuation of the valve according to the invention when the shut-off element is in the shut-off position. This time can then be used for maintenance work, etc. If these maintenance works are completed, the shut-off element can be moved to its open position, where the pressure medium can then be introduced into or out of at least one working chamber of the cylinder, allowing the piston to move again within the drive cylinder, thereby actuating the valve. The drive cylinder and piston can constitute a pneumatic actuator. In this case, the pressure medium is air or other gases or gas mixtures. However, the invention can also be used in principle for hydraulic actuators. In this case, a liquid (especially oil) is used as the pressure medium to apply pressure accordingly to the working chamber of the cylinder and the piston within the drive cylinder.

[0008] In the valve according to the invention, the drive cylinder can be a so-called single-acting cylinder, in which only one cylinder working chamber (and therefore only one side of the piston) can be pressurized. On the other side, such a single-acting drive cylinder can, for example, be provided with a spring for reset.

[0009] However, in the valve according to the invention, the drive cylinder can also be designed as a so-called double-acting cylinder. In this case, it is preferably specified that a cylinder working chamber for applying pressure medium is formed on opposite sides of the piston in the drive cylinder, and each conduit of the valve leads to the corresponding cylinder working chamber.

[0010] Even in this design according to the invention, where there are cylinder working chambers on both sides of the piston capable of applying pressure medium, it can be specified that the shut-off member, in its shut-off position, closes only one of the lines leading to the cylinder working chamber. However, the preferred design specifies that, in the shut-off position, the pressure medium is confined within both cylinder working chambers; while in the open position, both lines allow the pressure medium to flow. In this case, the shut-off member, in its shut-off position, closes both lines leading to the respective working chambers.

[0011] An actuator consisting of a drive cylinder and a piston movably supported therein can be used for a variety of different tasks of the valve. However, a preferred variation specifies that the drive cylinder and piston are used to move the valve disc or other closing member of the valve. In this case, it is therefore preferably specified that a rod movable with the piston is fixed to the piston, and the valve disc or other closing member of the valve for closing the opening is fixed to the rod. The valve disc or other closing member can close the opening with a pressure seal in the closed position. However, if the valve is, for example, a simple flow control valve, it is also entirely possible to specify that the valve disc or other closing member only covers the opening in the closed position, but does not completely fluid seal the opening. The opening that can be closed by means of the valve disc or other closing member of the valve can be located within the valve housing. However, this is not a mandatory requirement. In the valve according to the invention, it is also possible to specify that the valve disc or other closing member is used to close an opening located on other objects (e.g., process chambers, etc.). In short, the opening can therefore be constructed on the valve itself, but it can also be constructed on other objects.

[0012] While not absolutely necessary, in a preferred variant of the invention, it is specified that the stop element is preferably elastically pre-tensioned toward at least one of its endpoint positions. In this regard, a preferred variant of the invention specifies that the stop element has a pre-tensioning body that pre-tensions the stop element toward either the stop position or the conduction position. In the preferred variant, the pre-tensioning body is an elastic pre-tensioning body, such as a spring or an elastic body. With such a pre-tensioning body, it is always possible to automatically bring the stop element to the stop position or the conduction position, unless specific countermeasures are taken for this purpose.

[0013] To provide a defined endpoint position that is also tactilely perceptible when the stop element is actuated, a preferred variation of the invention specifies that the stop element has a locking device that locks the stop element in a stopped position and / or a closed position. Suitable locking devices are known in the prior art. The locking device may be, for example, a spring-loaded ball or a spring-loaded pin that engages in a corresponding locking groove at a corresponding position.

[0014] Generally, the shut-off element of the valve according to the invention can be used to perform a safety function by preventing accidental actuation of the actuator consisting of a working cylinder and a piston in the shut-off position. As a further safety measure, in a preferred variant of the invention, the shut-off element may also have a locking device for locking the shut-off element in the shut-off position and / or the open position. The locking device prevents the shut-off element from accidentally shifting from the shut-off position to the open position, and vice versa. The locking device can be designed in very different ways in principle. It can be an integral part of the shut-off element (especially the shut-off body, which will be mentioned later), if necessary. However, it can also be a part that is initially manufactured separately and then fixed to the shut-off element or shut-off body in a suitable manner. The locking device can consist of a single component or multiple components. Generally, the locking device prevents the shut-off element from being accidentally and / or at the wrong time from the shut-off position to the open position, and vice versa. A simple but effective design specifies that the locking device has at least one through hole for receiving a locking pin or a padlock shank. The locking pin (but also the padlock) can be part of the valve, for example, by means of a detachment prevention device such as a strap or cable. However, if the padlock or locking pin does not pass through a through-hole, they can also be completely independent of the valve. As also disclosed below in different embodiments, a preferred variation provides that the locking device has two through-holes, wherein if the two through-holes are arranged overlapping each other, i.e., aligned with each other, the locking pin or the locking beam of the padlock can pass through these two through-holes. A particularly preferred variation provides that at least one through-hole for receiving the locking pin or the padlock locking beam is constructed in a stop body and / or at least one sidewall, which will also be described below.

[0015] In a preferred design, the drive cylinder is housed within the valve housing. The shut-off element can, in principle, also be integrated into the valve housing. However, a particularly preferred variation specifies that the shut-off element can be detachably or securely mounted externally to the housing. In these variations, on the one hand, the shut-off element can be easily retrofitted to existing valves. On the other hand, if the shut-off element is located externally, it is more visually apparent, allowing for external observation of whether the valve housing is in the shut-off or open position within the appropriate design of the shut-off element.

[0016] The shut-off element of the valve according to the present invention can be designed differently in principle.

[0017] A preferred variation specifies that the shut-off element has two sidewalls and a shut-off body, the shut-off body being linearly movable and / or pivotally disposed between these sidewalls, wherein a portion of one or more pipes is constructed in each of these sidewalls, and the shut-off body, in a shut-off position, seals against a pressure medium by separating the portions of one or more pipes from each other, while in a conducting position, it connects the portions of one or more pipes to each other by allowing a pressure medium to pass through.

[0018] In these design approaches, for example, it can be specified that the preload body preloads the stop body relative to at least one sidewall toward the stop position or toward the guide position.

[0019] It can also be specified that some parts of the locking device are formed on the stop body, while other parts of the locking device that cooperate with it are formed on at least one side wall.

[0020] It is also feasible, and preferably, to stipulate that when the locking device is used to lock the stop, the locking device functions between the stop body and at least one sidewall of the stop. For this purpose, for example, it is feasible to form one of the aforementioned through holes in the stop valve body and another through hole in one of the sidewalls. Thus, if the locking pin or the locking beam of the padlock passes through these two through holes, the position of the stop valve body relative to the sidewall is fixed or locked.

[0021] The design and shape of a stop body can vary widely. For example, it can be at least partially or entirely plate-shaped, in which case it is also called a blocking plate. In any case, the function of a stop body is to prevent pressure media from passing through at least one conduit at the stop position. For this purpose, the stop body can be specified to have one or two through holes, which, in the open position, allow pressure media to pass through and are connected to each other.

[0022] Preferably, sealing rings are arranged in the sidewalls, each sealing ring surrounding an opening in a portion of one or more pipes, wherein the stop body abuts against the sealing ring. A particularly preferred variation specifies that the sealing rings (preferably located on opposite sides of the stop body) have different diameters. Due to the different large diameters of the sealing rings, the actuating force can be more uniform as the stop body moves from the stop position to the conduction position or in the reverse direction.

[0023] To ensure the safety function of the stop element, a preferred design of the invention specifies that the stop position and / or conduction position are visually identifiable from the outside. Particularly preferred is that the manually actuated or grippable portion of the stop element is visually identifiable from the outside. This portion of the stop element may, for example, be a preferably manually actuated pivot constructed on the stop element, but may also be a simple handle formed on the stop body.

[0024] In principle, it should be noted that the stop element can also be moved between the stop position and the open position by means of a motor or the like. However, a preferred variation specifies that the stop element can be adjusted between the stop position and the open position (preferably using only a tool or manually without a tool).

[0025] It should also be noted in principle that various features or components of the valve, even if mentioned herein in a singular (i.e., singular) or some other quantity, may exist in multiples or other quantities in the valve according to the invention. Generally, only the minimum or particularly preferred quantity is given herein.

[0026] The valve according to the invention is particularly preferably a vacuum valve.

[0027] However, the valve according to the present invention can also be used in completely different application areas.

[0028] Vacuum valves or vacuum technology specifically refer to those operating at pressure levels less than or equal to 0.001 millibars (mbar) or 0.1 Pascals (Pa). However, they can also be called "vacuum valves" or "vacuum technology" when operating at pressures below normal atmospheric pressure (i.e., below 1 bar). Attached Figure Description

[0029] Other features and details of the preferred design of the present invention are illustrated below by way of example.

[0030] Figures 1 to 10 This is a view of a valve with a shut-off element according to a first embodiment of the present invention; Figures 11 to 15 This is a view according to a second variation of the invention; Figures 16 to 19 This is a view according to a third variation of the invention; Figure 20 and Figure 21 This is a view according to the fourth variation of the present invention; Figures 22 to 26 This is a view according to the fifth variation of the invention; and Figures 27 to 30 This is a view according to the sixth variation of the present invention. Detailed Implementation

[0031] Figure 1 A valve 1 with a stop element 8 according to the invention is shown in an outer view. Figure 2 It shows along Figure 1 Cross-sectional view of section line AA. Additionally, in Figure 2 The diagram also schematically shows a closing member fixed to the valve stem 9, which in this case takes the form of a valve disc 10. This valve disc 10... Figure 1Not shown in the diagram. The opening (not shown in detail here) can be closed using the valve disc 10. This opening can be located in the process chamber or other similar location, but it can also be located within the correspondingly designed housing 17 of the valve 1. In this embodiment, the drive cylinder 2 of the valve 1 is located within the housing 17. The piston 3 is slidably mounted within the drive cylinder 2. In the first embodiment shown here and in other embodiments shown, the drive cylinder 2 is a double-acting cylinder. This means that cylinder working chambers 4 and 5, which can be pressurized by a pressure medium, are formed on two opposing sides of the piston 3, respectively. In order for the pressure medium to be introduced into and out of the cylinder working chambers 4 and 5, conduits 6 or 7 are respectively connected to the respective cylinder working chambers 4 or 5.

[0032] However, as mentioned at the beginning, the drive cylinder 2 of the valve 1 according to the invention does not necessarily have to be a double-acting cylinder. The drive cylinder 2 can also be designed as a single-acting cylinder. Thus, the cylinder working chamber 4 or 5 is provided only on one side of the piston 3. If there is only one cylinder working chamber 4 or 5, then a single pipe 6 or 7 is sufficient to introduce or discharge the pressure medium into or from the cylinder working chamber 4 or 5. In the case of a single-acting drive cylinder 2, it is preferable to provide a spring or other similar component on the side of the piston 3 opposite to the cylinder working chamber 4 or 5.

[0033] In this first embodiment of valve 1, it is also specified that valve 1 further has a shut-off element 8 adjustable between a shut-off position and a conducting position, which is used to close two pipelines 6 and 7, wherein, in the shut-off position of shut-off element 8, the pressure medium is closed within the cylinder working chamber 4 or 5; in the conducting position of shut-off element 8, pipelines 6 and 7 are allowed to flow through.

[0034] Preferably, as is also implemented here, the stop member 8 is fixed to the outside of the housing 17. This can be a non-destructive, removable connection, such as tightening, or it can be a fixed connection to the housing 17. In any case, the advantage of mounting the stop member 8 to the outside of the housing 17 is that, on the one hand, the stop member 8 is visible from the outside. On the other hand, this also allows for easy modification of the stop member 8.

[0035] According to Figure 2 As can be clearly seen in the cross-sectional view, the stop member 8 in the embodiment shown here and in subsequent embodiments has two sidewalls 18 and 19, wherein a stop body 20, designed here as a blocking plate, is disposed between the two sidewalls 18 and 19. In this first embodiment, the stop body 20 is linearly movable between the sidewalls 18 and 19. Partial areas of the pipes 6 and 7 are also located in the two sidewalls 18 and 19, respectively. Figure 2 as well as Figure 5 and Figure 6 As shown in the diagram, the shut-off body 20 seals and separates sections of pipes 6 and 7 from each other for pressure media. Figure 3 and Figure 4As shown in the conductive positions, portions of pipes 6 and 7 in sidewalls 18 and 19 are interconnected with ground via the stop body 20 for pressure media. In this first embodiment, the stop body 20 has two through holes 21 and 22, which, in the conductive positions, allow portions of the corresponding pipes 6 and 7 in the respective sidewalls 18 and 19 to be interconnected with ground, such as... Figure 4 This can be seen particularly clearly in the text.

[0036] In a preferred embodiment as shown herein, sealing rings 23 and 24 are arranged in sidewalls 18 and 19, which respectively surround openings in portions of pipes 6 and 7. A stop body 20 is disposed between and in close contact with the sealing rings 23 and 24.

[0037] In this first embodiment, for example, the sealing rings 23 and 24 are specified to have different diameters on opposite sides of the stop body 20. As mentioned at the beginning, this allows the force required to move the stop body 20 between the sealing rings 23 and 24 to be more uniform.

[0038] In this embodiment of the stop member 8, a locking device 12 is provided, by which the stop member 8 is locked in the stop position, and here also in the open position. Specifically, in this embodiment and the embodiments described below, this is achieved by having a locking ball 25, for example, elastically preloaded by a spring, and at least two locking slots 26. In the final position, i.e., in the stop position and the open position, the locking ball 25 is engaged in one of the locking slots 26 respectively. In the first embodiment specifically shown here, and also in the design variant shown below, the locking ball 25 is located in one of the side walls 18 or 19, here side wall 18. The locking slot 26 is constructed in the stop body 20. Of course, the locking ball 25 can also be located in the other side wall 19. Similarly, the locking ball 25 can be placed in the stop body 20, and the locking slot 26 can be placed in one of the side walls 18 or 19. In addition, there are other known forms of the locking device 12, such as spring-loaded locking lugs, which can be used as corresponding locking devices 12 in the stop member 8.

[0039] In this design and other preferred designs, the stop element 8 is preferably movable only manually between the stop position and the open position. For this purpose, the stop body 20 has a handle 33, which is conveniently located on the exterior of the side walls 18 and 19. The handle 33 is also clearly visible from the outside, thus allowing the stop position and the open position to be easily visually identified from the outside at the position of the handle 33.

[0040] In principle, it is also possible to use a motor or other actuator to move the stop element 8 back and forth between its closed and open positions, as in this embodiment. However, preferably, in this embodiment, such actuation or movement of the stop element 8 between the closed and open positions is performed manually, preferably only manually. In this embodiment, the operator grips handle 33 accordingly and moves the stop element 20 in one of the directions of arrows 27 and 28. Arrows 27 and 28 may be marked so that they are easily visually identifiable from the outside as to which direction the stop element 20 must be moved to be brought to the closed or open position.

[0041] Preferably, as also specified in the first embodiment, the stop member 8 has a locking device 13. This locking device 13 is used to lock the stop member 8 in the closed position and / or the open position. This is an additional safety measure to prevent the stop member 8 from accidentally shifting at the wrong time. The locking device 13 can be designed in very different ways. It can be fixed to the stop member 8 as an additional component. However, it can also be integrally constructed on the stop member 8, for example, as a hook-shaped protrusion on the stop body 20 if necessary. According to... Figures 1 to 10 In the first embodiment specifically shown here, the locking device 13 has both a through hole 14 on the stop body 20 (or more precisely, on the handle 33 of the stop body 20) and another through hole 15 on the side wall 19. If the two through holes 14 and 15 (as in...) Figure 2 and Figure 6 As shown in the diagram, and in this embodiment in particular, the parts are arranged aligned with each other at the cut-off position. The locking pin 16 or the padlock beam can then pass through the through holes 14 and 15, thereby locking the cut-off element 8 (or specifically the cut-off body 20) in the corresponding position, here the cut-off position. The locking pin 16 or the padlock beam can remain in the through holes 14 and 15 for a period of time, thereby locking the cut-off element 8 in the corresponding position until maintenance or other work is completed. The cut-off element 8 can only be repositioned when the locking pin 16 or the padlock beam is removed from the through holes 14 and 15.

[0042] exist Figures 3 to 8 The various positions of the stop piece 8 are now shown. Figure 4 This shows the route along Figure 3 The cross-sectional view of the section line BB in the diagram. Figure 6 It shows along Figure 5 The cross-sectional view of the section line CC in the diagram. Figure 8 It shows along Figure 7 The cross-sectional view of the cutting line DD in the diagram.

[0043] Figure 3 and Figure 4The conductive position of the stop element 8 is shown. This is visually clearly identifiable by the fact that, from the outside, the stop element 20, or specifically the handle 33, extends a distance from the area between the two side walls 18 and 19. Figure 4 It can also be seen that at this endpoint, the locking device 12 is engaged in such a way that the locking ball 25 is correspondingly engaged into one of the locking slots 26. It can also be seen how the through holes 21 and 22 of the stop body 20 connect corresponding portions of pipes 6 and 7 to each other, thereby allowing the pressure medium to pass through them.

[0044] as Figure 2 , Figure 5 and Figure 6 The shut-off position of shut-off element 8 is shown. In this shut-off position, shut-off body 20, including handle 33, is pushed a certain distance into the area between sidewalls 18 and 19, such that the through holes 21 and 22 of shut-off body 20 are located in areas outside the areas sealed by seals 23 and 24 around the respective outlets of pipes 6 and 7. Therefore, in this shut-off position, pressure medium can no longer enter from the portion of pipes 6 and 7 located in one sidewall 18 into the portion of pipes 6 and 7 located in the other sidewall 19. Thus, according to Figure 5 and Figure 6 At the cutoff position, the pressure medium is locked in the corresponding cylinder working chamber 4 or 5. According to... Figure 5 and Figure 6 In this locked position, the locking device 12 is also engaged, in this embodiment, with the locking ball 25 positioned in another locking groove 26. This stop position can be additionally secured by passing the corresponding locking pin 16 or the corresponding locking beam of the padlock through the through holes 14 and 15 of the locking device 13. Another advantage of using a padlock is that, in the locked state, the padlock can only be reopened by entering the corresponding numerical password or using the corresponding key. This can also be used as an additional security measure to prevent the stop 8 from being accidentally actuated or displaced at the wrong time.

[0045] Figure 7 and Figure 8 The intermediate position between the cut-off and open positions is shown. Here, the locking ball 25 is not engaged in any locking groove 26. Although the through holes 21 and 22 are no longer aligned with the corresponding portions of pipes 6 and 7, they are still always locally arranged within the areas of seals 23 and 24. According to... Figure 8 The cross-sectional view also shows a ventilation channel 29, which is preferably located at the end of the stop body 20 opposite to the handle 33, so that when the stop body 20 moves accordingly in the direction 27 or 28, the space between the side walls 18 and 19 can be ventilated.

[0046] Figure 9 and Figure 10 A top view of the stop member 8 of this first embodiment is now shown, in which the upper sidewall 18 has been removed. The stop body 20, which can move within the corresponding recess in the sidewall 19, can then be directly seen. Figure 9 The conduction position is shown. Figure 10 The cutoff position is shown. Figure 9 and Figure 10 The sealing ring 23 located in the upper sidewall 18 is also shown. According to... Figure 9 In the conduction position, two through holes 21 and 22 on the stop body 20 are arranged within the sealing ring 23. (The stop position is shown in the diagram.) Figure 10 In the middle, the two through holes 21 and 22 of the stop body 20 are located outside the area surrounded by the sealing ring 23.

[0047] exist Figure 9 and Figure 10 A preferred design can also be seen, in which an elongated hole guide 31 is provided. Specifically, in this embodiment, the elongated hole guide consists of corresponding elongated holes extending parallel to directions 27 and 28, and bolts inserted into these elongated holes, the bolts being fixed in place to the sidewalls 18 and / or 19. The elongated hole guide 31 is primarily responsible for ensuring that the stop body 20 abuts at its endpoint positions, i.e., the stop position and the conduction position, without moving beyond these positions. Of course, to form the elongated hole guide 31, the elongated holes can also be arranged on one of the sidewalls 18 or 19, and the bolts passing through can be arranged on the stop body 20.

[0048] Figures 11 to 15 A second embodiment of valve 1 according to the invention is now shown, which includes a corresponding shut-off element 8 according to the invention. The valve 1 and shut-off element 8 of this second embodiment are identical in many features to those of the first embodiment; therefore, only the differences will be discussed below, with reference to the description above for other aspects. In any case, Figure 11 A longitudinal sectional view of the valve 1 housing 17 and the shut-off member 8 is shown again. Figure 11 The cut-off position of cut-off piece 8 is shown. Figure 12 A top view of the stop piece 8 at this stop position is shown. Figure 13 A cross-sectional view of the stop member 8 in the conducting position of the second embodiment is shown.

[0049] Unlike the view in the first embodiment, a locking pin 16 is shown here, which, according to... Figure 11 The stop position passes through the two through holes 14 and 15, thereby locking the stop element 8 in the stop position. Only when the locking pin 16 is pulled out a corresponding distance from the through holes 14 and 15 can the stop element 8 be brought to the position according to the stop body 20. Figure 13The conduction position. As per... Figure 12 As shown in the external view, a detachment prevention element 30 is preferably provided, which in this example allows the locking pin 16 to connect to one of the sidewalls 18 or 19 of the stop element 8. The detachment prevention element 30 can be, for example, a strap, cable, etc.

[0050] The second difference from the first embodiment is that a preload body 11 is provided here, which preloads the stop element 8 toward the stop position or the conduction position. In the embodiment shown here, the preload body 11 is an elastic spring that acts on the stop element 20 on the side opposite to the handle 33. If the preload body 11 is a tension-preloaded spring, it preloads the stop element 20, thereby preloading the stop element 8 toward the stop position. However, if the preload body 11 is a compression-preloaded spring, it preloads the stop element 20, thereby preloading the stop element 8 toward the stop position. Figure 13 The conductive position shown is pre-tightened.

[0051] Figure 14 and Figure 15 The arrangement of the pretensioner 11 is shown again in more detail, in such a way that a top view of the stop member 8 is shown here, wherein the upper sidewall 18 is not shown. Figure 14 The conduction position is shown again, and Figure 15 The cutoff position is shown.

[0052] Figures 16 to 19 A third embodiment of valve 1 according to the present invention is now shown, which is also a variation of the first embodiment. Here, only the differences from the first embodiment will be discussed. In any case, Figure 16 A longitudinal sectional view of valve 1 and shut-off element 8 is shown again. Figure 16 In the middle, the cut-off piece 8 is in the cut-off position. Figure 17 A longitudinal sectional view of the stop element 8 in the open position is shown. Figure 18 and Figure 19 A top view of the stop member 8 in this embodiment is shown again, in which the upper sidewall 18 is removed. Unlike the first embodiment, in this variation, the stop body 20 does not block both pipes 6 and 7 at its stop position, but only one of the pipes 6. Therefore, the stop body 20 in this embodiment also has only one through hole 21. According to... Figure 17 The through-hole 21 is aligned with a portion of the sidewalls 18 and 19 of the conduit 6, allowing the pressure medium to pass through. According to... Figure 16 At the cut-off position, the stop body 20 moves a distance such that the through hole 21 no longer connects portions of the pipe 6 to each other. Seals 23 and 24 also function at the cut-off position to ensure that the stop body 20 forms a seal relative to the side walls 18 and 19, as is the case in other embodiments. In this embodiment, the pipe 7 remains open regardless of the position of the stop body 20.

[0053] Although according to Figures 16 to 19 In the third embodiment, the pretensioner 11 is not provided, but according to Figure 20 and Figure 21 The fourth embodiment presents a different situation (a pre-tightening body is provided). The fourth embodiment is based on the third embodiment, except for the pre-tightening body 11. The only difference is that a pre-tightening body 11 is provided here, which can be pre-tightened in the manner described in the second embodiment, such that the stop body 20 and the stop member 8 are pre-tightened toward one of the endpoint positions, i.e., toward the stop position or the conduction position.

[0054] Although the stop body 20 is movable back and forth between a stop position and a conduction position in the embodiments described so far, some embodiments will also be exemplarily described below in which the stop body 20 is pivotally positioned between a stop position and a conduction position. Therefore, according to... Figures 22 to 30 In the embodiments, the stop body 20 is pivotable about the pivot 32. Of course, for this pivotable arrangement of the stop body 20, it is not necessary to have a pivot 32 designed as a bolt. In order for the stop body 20 to pivot, it has a manually actuated pivot rod 34, the corresponding position of which is clearly visible from the outside and indicates to the user whether the stop member 8 is in the closed position or the open position.

[0055] According to Figures 22 to 26 In the fifth embodiment, the stop body 20 also has two through holes 21 and 22. Figure 23 It was shown again along Figure 22 The longitudinal section of the midsection line FF, where, with Figure 22 The difference is, Figure 23 The valve disc 10 is also shown. Figure 24 The indicated conduction positions show that the two through holes 21 and 22 are aligned with portions of the sidewalls 18 and 19 of pipes 6 and 7, respectively, allowing pressure media to pass through. Figure 23 At the cut-off position shown, the cut-off body 20 pivots, causing it to close pipelines 6 and 7 by means of sealing rings 23 and 24, thereby locking the pressure medium in the cylinder working chambers 4 and 5 respectively.

[0056] exist Figure 25 and Figure 26 In this fifth embodiment, the stop member 8 is shown in the top view, without the upper sidewall 18. However, the sealing ring 23 arranged in the upper sidewall 18 is also shown. Figure 25 The cutoff position is shown, in which the cutoff body 20 is pivoted a certain distance about the pivot 32, such that the through holes 21 and 22 are arranged outside the area surrounded by the sealing ring 23, and therefore also outside the openings of pipes 6 and 7. On the other hand, Figure 26The conductive position is shown, in which the stop body 20 pivots such that its through holes 21 and 22 are arranged within the sealing ring 23, thus as Figure 24 As shown, it is aligned with a portion of pipes 6 and 7.

[0057] Despite according to Figures 22 to 26 In this fifth embodiment, the two pipes 6 and 7 can be closed and opened by means of the stop body 20, but Figures 27 to 30 The sixth embodiment discloses a variation in which the stop body 20 is pivotally mounted on the one hand, but on the other hand has only one through hole 21. Here, as in the embodiment... Figures 16 to 21 In the third and fourth embodiments, pipe 7 is always open. Meanwhile, pipe 6 is open according to... Figure 27 The cutoff position is blocked by the cutoff body 20, only according to Figure 28 The conduction position is opened. Figure 28 In the middle, the through hole 21 is arranged aligned with a portion of the pipe 6.

[0058] Figure 29 and Figure 30 A top view of the stop member 8 of this sixth embodiment is shown again. Figure 29 and Figure 30 In the middle, the upper sidewall 18 was also removed. Figure 29 The cutoff position can be seen in the image. Figure 30 The conductive position can be seen in the image.

[0059] List of reference numerals 1 Valve 2 drive cylinders 3 Pistons 4-cylinder working chamber 5-cylinder working chamber 6 Piping 7 Piping 8 Deadline 9 strokes 10 Valve disc 11 Pre-tightening body 12. Locking device 13 Locking device 14 Through holes 15 Through Holes 16 Locking pins 17. Casing 18 Sidewalls 19 Sidewalls 20 cutoff bodies 21 Through Hole 22 Through Holes 23 Sealing ring 24 Sealing rings 25 Locked ball 26 Locking slots 27 Directional arrows 28 Directional arrows 29. Ventilation Channel 30. Anti-fall-off parts 31. Long Hole Guide 32 Pivot 33 Handle 34 Pivot rod

Claims

1. A valve (1) having a drive cylinder (2) and a piston (3) movably supported in the drive cylinder (2), wherein, In the drive cylinder (2), at least one cylinder working chamber (4, 5) capable of applying a pressure medium is constructed on at least one side of the piston (3), and the pipeline (6, 7) of the valve (1) is connected to the cylinder working chamber (4, 5). The valve (1) is characterized in that the valve (1) has a shut-off element (8) adjustable between a shut-off position and a conduction position for closing the pipeline (6, 7), wherein, in the shut-off position of the shut-off element (8), the pressure medium is closed in the cylinder working chamber (4, 5); in the conduction position of the shut-off element (8), the pressure medium can flow through the pipeline (6, 7).

2. The valve (1) according to claim 1, wherein, In the drive cylinder (2), cylinder working chambers (4, 5) capable of being subjected to the pressure medium are respectively constructed on the opposite sides of the piston (3), and each pipe (6, 7) of the valve (1) is connected to the corresponding cylinder working chamber (4, 5).

3. The valve (1) according to claim 2, wherein, At the cut-off position of the cut-off member (8), the pressure medium is sealed in the working chambers (4, 5) of the two cylinders, and at the open position of the cut-off member (8), the pressure medium can flow through the two pipelines (6, 7).

4. The valve (1) according to any one of claims 1 to 3, wherein, A rod (9) that can move together with the piston (3) is fixed on the piston (3), and a valve disc (10) or other closing member of the valve (1) for closing the opening is fixed on the rod (9).

5. The valve (1) according to any one of claims 1 to 4, wherein, The stop member (8) has a pre-tightening body (11) that pre-tightens the stop member (8) toward the stop position or toward the conduction position.

6. The valve (1) according to any one of claims 1 to 5, wherein, The stop member (8) has a locking device (12) for locking the stop member (8) in the stop position and / or the conduction position.

7. The valve (1) according to any one of claims 1 to 6, wherein, The stop member (8) has a locking device (13) for locking the stop member (8) at the stop position and / or the conduction position.

8. The valve (1) according to claim 7, wherein, The locking device (13) has at least one through hole (14, 15) for receiving a locking pin (16) or a padlock shank.

9. The valve (1) according to any one of claims 1 to 8, wherein, The drive cylinder (2) is arranged in the housing (17) of the valve (1), and the stop member (8) can be disassembled or fixedly installed outside the housing (17) without damage.

10. The valve (1) according to any one of claims 1 to 9, wherein, The shut-off element (8) has two sidewalls (18, 19) and a shut-off body (20) which is linearly movable and / or pivotally disposed between the sidewalls (18, 19), wherein a portion of the conduit (6, 7) or these conduits (6, 7) is constructed in each of the sidewalls (18, 19), and the shut-off body (20) in a shut-off position seals against the pressure medium and separates the portion of the conduit (6, 7) or these conduits (6, 7) from each other, while in a conducting position it connects the portion of the conduit (6, 7) or these conduits (6, 7) to each other in a passable manner for the pressure medium.

11. The valve (1) according to claim 10, wherein, The stop body (20) has one or two through holes (21, 22) that allow the pressure medium to pass through in the open position to connect the pipe (6, 7) or portions of the pipes (6, 7) to each other.

12. The valve (1) according to claim 10 or 11, wherein, Sealing rings (23, 24) are arranged in the sidewalls (18, 19) respectively, the sealing rings surrounding the openings of the pipes (6, 7) or a portion of the pipes (6, 7), wherein the stop body (20) abuts against the sealing rings (23, 24).

13. The valve (1) according to claim 12, wherein, The sealing rings (23, 24) have different diameters from each other.

14. The valve (1) according to any one of claims 10 to 13 and claim 8, wherein, At least one through hole (14, 15) for receiving the locking pin (16) or the locking beam of the padlock is constructed in at least one sidewall of the stop body (20) and / or the sidewall (18, 19).

15. The valve (1) according to any one of claims 1 to 14, wherein, The cut-off position and / or the conduction position can be visually identified from the outside.

16. The valve (1) according to any one of claims 1 to 15, wherein, The stop element (8) can be adjusted between the stop position and the conduction position using a tool or manually without a tool.

17. A valve (1), wherein, The valve (1) is a vacuum valve.

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