DE102016125236A1 - shut-off valve - Google Patents

Abstract

A shut-off valve and a method for actuating a shut-off valve will be described. The shut-off valve comprises a shut-off element (110) for a pipeline, which has a passage opening (115), wherein circumferentially on the shut-off (110) two or more circumferential seals (112, 114) are mounted, and wherein the outlet (102) or the Input (101) of the shut-off valve between the two or more circumferential seals lies. A method for actuating such a shut-off valve is also described.

Description

TECHNICAL AREA

Embodiments of the present invention relate to shut-off valves, for example, for piping systems through which a flow medium, such as a liquid or gaseous flow medium, flows. The shut-off valve comprises a flow channel for the flow medium and a shut-off element for blocking the flow channel for the flow medium. When closed, the shut-off valve should seal an inlet of the flow channel with respect to an outlet of the flow channel.

STATE OF THE ART

Shut-off valves are used, inter alia, in pipeline construction to transport a flow medium, which may be, for example, liquid or gaseous. If the media pressure rises, the shut-off valve installed in it is subject to a higher mechanical load, often also wear. The differential pressure of the medium in front of and behind the shut-off element, i. the closing body, loads the closing body and presses it against a sealing element. If the pressure is correspondingly high, the closing body of the valve can no longer be moved by hand. To operate then large levers or drives are needed.

The high frictional forces on the sealing elements of the pressurized closing body lead to high wear. For media that are subject to a hazard class, absolute tightness is required. These valves often have to be replaced, which is associated with corresponding costs.

In view of the above problems, the invention has for its object to provide a simple-to-operate and low-wear shut-off valve for a piping system. In particular, a shut-off valve is to be provided which can be operated by hand even at high differential pressures.

SUMMARY OF THE INVENTION

According to one embodiment, a shut-off valve is provided, for example, for a pipeline, in particular with liquid or gaseous substances. The shut-off valve has a shut-off element with a through-opening, wherein circumferentially on the shut-off two (or more) circumferential seals are mounted and wherein the departure or the entrance of the shut-off valve between the two (or more) circumferential seals.

The shut-off element is in some embodiments a closing tube, in particular a cylindrical tube such as a circular cylindrical tube.

In some embodiments, the shut-off valve has a flow channel for a flow medium extending from the entrance to the outlet, wherein the shut-off element is displaceable in a direction of movement between a blocking position in which it blocks the flow channel and a release position in which it releases the flow channel ,

It has been found to be expedient that in the blocking position of the outlet (or alternatively the input) of the flow channel to an outer side wall of the shut-off between the two or more circumferential seals and over the two or more circumferential seals against the input (or alternatively the departure) is sealed. Alternatively or additionally, it has been found to be expedient that in the blocking position the inlet (or alternatively the outlet) of the flow channel is in fluid communication with the passage opening of the shut-off element.

In particular, in some embodiments, the inlet of the flow channel is inwardly of the passage opening of the shut-off element, and the outlet of the flow channel is on the outside of the side wall of the shut-off between the two circumferential seals, or vice versa.

According to a further aspect of the invention, a shut-off valve is provided. The shut-off valve comprises a valve body, which forms a flow passage for a flow medium extending from an entrance to an outlet, and a shut-off element, wherein the shut-off between a blocking position in which it blocks the flow channel for the flow medium, and a release position in which it Flow medium for the flow medium releases, is displaceable in a direction of movement, wherein the shut-off element has a passage opening for the flow medium, which provides a fluid connection between two opposite sides of the shut-off in the direction of movement.

For example, a fluid connection between two inner volumes of the fitting housing is made via the passage opening in the blocking position, which adjoin in the direction of movement at two opposite ends of the shut-off element.

According to a further aspect, a shut-off fitting is provided, which is used for attaching a lock element for removing the Absperrelements is set up with pressurized flow channel. In particular, a valve arrangement is described, which has the following: a shut-off valve according to the invention as well as a lock element, which is set up for attachment to the shut-off valve for removing the shut-off element when the flow channel is pressurized.

According to a further aspect of the invention, a method for actuating a shut-off valve, in particular a shut-off valve described herein, is provided. The shut-off valve has a flow channel extending from an inlet to an outlet for a flow medium and a shut-off element for blocking the flow channel. According to the invention, the blocking element is displaced in a direction of movement between a blocking position in which the blocking element blocks the flow channel and a release position in which the blocking element releases the flow channel, while a passage opening extending through the blocking element forms a fluid connection for the flow medium between two opposite sides the shutoff in the direction of movement produces.

list of figures

• 1A eine schematische Schnittdarstellung einer ersten Ausführungsform einer Absperrarmatur in einer Sperrstellung (I);
• 1B eine schematische Schnittdarstellung der in 1A gezeigten Absperrarmatur in einer Freigabestellung (II);
• 2A eine schematische Schnittdarstellung einer weiteren Ausführungsform einer Absperrarmatur in einer Sperrstellung (I);
• 2B eine schematische Schnittdarstellung der in 2A gezeigten Absperrarmatur in einer Freigabestellung (II);
• 3 eine schematische Schnittdarstellung einer weiteren Ausführungsform einer Absperrarmatur in einer Freigabestellung (II);
• 4 eine schematische Schnittdarstellung einer weiteren Ausführungsform einer Absperrarmatur in einer Sperrstellung (I);
• 5 eine schematische Schnittdarstellung einer weiteren Ausführungsform einer Absperrarmatur in einer Sperrstellung (I); und
• 6 eine schematische Schnittdarstellung einer weiteren Ausführungsform einer Absperrarmatur in einer Sperrstellung (I);.

Embodiments are illustrated in the drawings and explained in more detail in the following description. The embodiments are to be understood as illustrative and not restrictive. In the drawings shows:

• 1A a schematic sectional view of a first embodiment of a shut-off valve in a blocking position (I);
• 1B a schematic sectional view of in 1A Shut-off valve shown in a release position (II);
• 2A a schematic sectional view of another embodiment of a shut-off valve in a blocking position (I);
• 2 B a schematic sectional view of in 2A Shut-off valve shown in a release position (II);
• 3 a schematic sectional view of another embodiment of a shut-off valve in a release position (II);
• 4 a schematic sectional view of another embodiment of a shut-off valve in a blocking position (I);
• 5 a schematic sectional view of another embodiment of a shut-off valve in a blocking position (I); and
• 6 a schematic sectional view of another embodiment of a shut-off valve in a blocking position (I).

In the drawings, like reference characters designate like or functionally identical components or steps.

WAYS FOR CARRYING OUT THE INVENTION

In the following, reference will be made to various embodiments of the invention, several examples of which are illustrated in the drawings.

Shut-off valves are typically used in pipelines intended for transporting a flow medium. In this case, the shut-off valve is provided in a blocking position for blocking a flow channel, so that the flow medium in the blocking position can not flow from the entrance to the outlet of the shut-off valve and / or vice versa. In a release position, the shut-off valve releases the flow channel, so that the flow medium can flow from the inlet to the outlet through a pipe of the shut-off valve.

Shut-off valves are not limited to use on pipelines. The term "shut-off valve" as used in the present disclosure is to be understood broadly, and includes components such as shut-off valves, shut-off valves, shut-off valves, shut-off members or the like, which can be used to shut off any material flow in a flow channel , Thus, a shut-off device is not necessarily to be operated by means of a lever or a handle (such as a handle), but may alternatively or additionally be an automatic, hydraulic, motor, pneumatic, servo-controlled, remote-controlled and / or control-operated valve. For example, an injector of an engine such as a diesel engine falls under the concept of "shut-off valve" because an injector is a member for shutting off and releasing a mass flow. Also, a lock or other openable lock in a flow channel is a shut-off valve.

The flow medium may be at least partially or completely liquid and / or gaseous. In some embodiments, the flow medium includes solids that are transported by a fluid carrier through the conduit. The flow medium may also be viscous or pasty. In particularly preferred Embodiments, the flow medium is at least partially liquid and / or gaseous. For example, the flow medium comprises at least one or more of the following: water, such as river or lake water, fresh water and sewage, oil, hydraulic oil, natural gas or other energy gases, air such as compressed air, steam, toxins, acids, bases, gasoline and others Flammable liquids such as fuel mixtures, aerosols such as fuel-air mixtures and other substances.

The shut-off valve can be configured to block a pipeline for the transport of water, for example. Fresh water or wastewater, or for the transport of oil or natural gas. For example, the shut-off valve is designed for installation in a gas line system or water supply system for home or industrial use. However, as already mentioned, the invention is not limited to such applications and may, for example, be used in engines and other industrial installations, for example for shutting off a fuel line, in pneumatic or hydraulic applications or the like.

According to some embodiments, the shut-off valve has a fitting housing, which may be at least partially designed as a pipeline for the transport of the flow medium. The fitting housing forms the flow channel, which extends from the entrance to the outlet of the fitting housing. The flow medium enters via the inlet in the flow channel formed by the valve body and leaves the valve body via the outlet. The input may be provided for connection to a first line, and the outlet may be provided for connection to a second line. Between the entrance and the outlet, the shut-off element is provided for preferably sealing closing of the flow channel.

In conventional shut-off valves typically acts in the locked position, a high pressure on the shut-off, which is thus pressed against a seal or a valve seat. This asymmetric loading of the shutoff makes it difficult to operate the shut-off valve to release the flow channel and leads to high wear of the actuating, locking and sealing elements.

This problem is solved by shut-off valves or shut-off valves as described herein by way of example and diagrammatically 1A and 1B are shown. In 1A is a shut-off valve 100 in the locked position I represented, and in 1B is the shut-off valve in the release position II shown.

In the release position II gives the shut-off element 110 the flow channel 105 between the entrance 101 and the departure 102 the shut-off valve 100 free. In the locked position I closes the shut-off element 110 the flow channel 105 between the entrance 101 and the departure 102 preferably tight.

The shut-off element 110 has (at least) one passage opening 115 on. Furthermore, the shut-off element 110 of (at least) two seals 112 . 114 circulate, namely a first seal 112 and a second seal 114 , In the embodiment of the 1A is the departure 102 the shut-off valve in the locked position I between the two seals 112 . 114 on the outside of the shut-off element 110 on, and the entrance 101 the shut-off valve is in fluid communication with the passage opening 115 and lies inside the shut-off.

The entrance and exit are however interchangeable. Thus, it is equally conceivable in other embodiments that the input in the blocking position I between the two seals on the outside of the shut-off 110 is present, and the departure with the passage opening 115 is in fluid communication. It should be noted in this context that in the embodiments described herein, the entrance and the exit are interchangeable, and that only particularly expedient embodiments are shown in the drawings.

It can also be provided more than two seals, eg. To further improve the seal between the entrance and the exit in the locked position. Also in this case, the outlet (or the entrance) between two spaced-apart seals abut, which rotate around the shut-off.

The passage opening having shut-off 110 (Herein also referred to as "closing body") may be formed as a closing tube. A closure tube comprises a lateral surface and a through opening circumscribed by the lateral surface. For example, the shut-off element is a tubular element with a rounded or round circumference, in particular a cylindrical tube such as a circular cylindrical tube. In an expedient embodiment, the closure tube can be formed substantially rotationally symmetrical.

The passage opening preferably runs along the longitudinal axis of the shut-off element centrally through the shut-off element. In other embodiments, the through hole does not extend through the center of the closure tube, but eccentrically through the closure tube. The passage opening preferably runs straight or linear through the Closure tube. However, it is also conceivable a curved or at an angle through the closing tube extending through opening. In particular, the passage opening establishes a fluid connection between two opposite sides of the shut-off element, preferably in its direction of movement.

In the in 1A illustrated embodiment, the closure tube has the shape of a straight circular cylinder with centrally extending passage opening 115 , Such a closure tube is particularly simple and inexpensive to produce and can be used in a pipeline with a circular inner diameter. However, it is also conceivable closing tubes with an oval or curved circumference, which can be used in a correspondingly shaped pipe. Furthermore, closure tubes with an eccentrically arranged passage opening and / or with a passage opening are conceivable which does not have a constant diameter, for example, with a tapered passage opening.

The shut-off element can be round, oval, elliptical, triangular or polygonal, with or without rounded edges, for example as a round, oval, elliptical or angular closure tube. Alternatively or additionally, the shut-off element can have one, two, three or more passage openings which can run straight and / or obliquely, centrally and / or eccentrically through the shut-off element. The closure tube may be barrel-shaped, for example, with a passage opening with at least partially or completely concave running wall to compensate for a self-adjusting crowning when pressurized.

The two seals 112 . 114 are preferably arranged on the outside of the shut-off element and circulating this completely. In the locked position I The seals in each case act between an outer wall of the shut-off element and an inner wall of the fitting housing 201 ,

According to a preferred embodiment, the shut-off element 110 between the blocking position I in which there is the flow channel 105 closes, and the release position II in which there is the flow channel 105 releases, in one direction of movement X movable. For adjusting the shut-off valve of the in 1A shown blocking position I in the in 1B shown release position II becomes the shut-off (in particular along a linear path) in the direction of movement X emotional. For adjusting the shut-off valve of the in 1B shown release position II in the in 1A shown blocking position, the shut-off (in particular along a linear path) is moved in the opposite direction. Unlike ball valves or other valves with a rotatable valve member, the shut-off element is therefore preferably not rotated, but moved or moved linearly. The orientation of the passage opening 115 in the locked position I corresponds to the orientation of the passage opening in the release position II when the shut-off element is moved linearly.

In 1A it can be seen that the passage opening 115 in the locked position I a fluid connection between two opposite sides of the shut-off element 110 in the direction of movement X provides. This closes at the two opposite ends of the shutoff in the direction of movement inside volumes of the valve body, in which there is substantially the same pressure due to the fluid connection produced by the passage opening. The shut-off element is therefore not asymmetrically loaded in the direction of movement, whereby a displacement of the shut-off element in the direction of movement X starting from the blocking position I is simplified. In particular, the shut-off element is not pressed asymmetrically against a sealing seat.

The invention is based on the knowledge that the high wear in conventional slide or ball valves is caused in particular by an asymmetric load of the closing body. According to the invention, however, in the locked position I the pressure of the entrance 101 (or alternatively leaving) of the flow channel symmetrically on both sides of the shut-off element 110 in the direction of movement X issue.

Furthermore, it may be provided according to the invention that the pressure of the outflow 102 (or alternatively input) in the locked position I circumferentially on the outside of the shut-off element between the two seals 112 . 114 is applied. There is then no preferred direction in which the shut-off would be pressed against a sealing seat. Rather, the pressure of departure is 102 circumferentially and preferably (rotational) symmetrically on the entire shut-off element, wherein in particular at the same time the shut-off element is acted upon by the passage opening at any time inside by the flow medium (in particular symmetrically) of the pressure of the input.

For example, in the blocking position, the closing tube is on the outside between the two seals 112 . 114 depressurized or has the pressure of the outlet and is pressurized on the inside or has the pressure of the input. Preferably, the closing tube of the two seals is rotated in such a way that the two pressures rest symmetrically on the closing tube. The closing tube thus hovers approximately and is not pressed in one direction. The friction of the seals on the inner wall of the valve body is included many times less than the pressure acting on seals in conventional slide valves or ball valves. As a result, the shut-off, even if it seals high pressures between the inlet and outlet, be adjusted by applying a low actuation force, and is subject to low wear.

The passage opening 115 can be in the direction of movement X through the shut-off element 110 extend through and thus on both sides of the shut-off in the direction of movement X provide the same pressure. For example, the shut-off element 110 in the locked position I a fluid connection between a receiving space 206 for receiving the shut-off element 110 in the release position and the entrance 101 the flow channel ago. In the recording room 206 for receiving the shut-off element and in the input of the flow channel then prevails in the blocking position I the same pressure.

In some embodiments, the two seals circulate 112 . 114 the shut-off element 110 spaced from each other in the direction of movement X at a distance greater than the diameter of the outlet 102 , For example, the distance between the first seal 112 and the second seal 114 in the direction of movement 5 cm or more, 10 cm or more, or 20 cm or more, depending on the diameter of the pipe to be shut off. In the case of large pipes, eg. For the transport of oil, in hydroelectric power stations o. The like., The distance between the two seals 112 , 144 may be larger, for example 1 m, 2 m or more. There may also be more than two seals to ensure improved tightness between the inlet and outlet. The seals may be provided as separate sealing elements or as an integral sealing element.

The seals may, for example, in each case in the form of a ring seal, for example. Of elastomer, polymer, silicone or rubber, be formed, which is the shut-off 110 each circulate, in particular attached thereto. For example, the seals are designed as O-rings, in particular as circular O-rings. It can also seals of other materials are used, for example. Metal seals.

In some embodiments, the seals are fastened to the outside of the shut-off element, for example, received in circumferential grooves on an outer wall of the shut-off element and / or firmly bonded to the shut-off element, for example by gluing. In some embodiments, the seals are integrally formed with the shut-off element, for example in the form of circumferential sealing projections on the shut-off element.

For example. For example, a shut-off element in the form of a metallic or polymeric closing tube can have outwardly projecting annular projections which serve as seals. Particularly suitable in terms of a good seal and in terms of good mobility between shut-off and valve body annular polymer seals have been found.

The seals may each be between an outer wall of the shut-off element 110 and an inner wall of the fitting housing 201 act and seal in the locked position I the entrance from the departure.

With regard to an increase in the wear resistance of the shut-off, it has proven to be expedient that the passage opening 115 the shutoff in the locked position I with the entrance 101 the fluid channel is in fluid communication, and the shut-off element 110 circumferential space between the two seals 112 . 114 with the finish 102 the fluid channel is in fluid communication. As already mentioned, the inlet and outlet of the flow channel can in principle also be interchanged.

In the in 1A embodiment shown close the entrance 101 and the finish 102 an angle of 30 ° or more, preferably 45 ° or more, in particular about 90 °, relative to each other. In particular, the shut-off valve 100 be formed as an angle cock, which leads the flow medium along a curved flow path, for example. Along a 90 ° curve.

It has proved to be useful that the shut-off 110 either along the direction of the entrance 101 or along the direction of departure 102 is mobile. In other words, the direction of movement runs X either in the direction of the departure or in the direction of the entrance.

In the in 1A the embodiment shown corresponds to the direction of movement X the extension direction of the input 101 , The shut-off element is in this case for blocking the flow path starting from the receiving space 206 for receiving the shutoff in the release position II in the direction of the entrance 101 Slidable towards the entrance, until the outer wall of the shut-off the from the entrance 101 outgoing outlet at an angle 102 concealed and separated tightly from the entrance by means of the seals. The recording room 206 for receiving the shutoff in the release position can in this case as be formed linear continuation of the input on the other side of the departure.

In some embodiments, the valve body 201 form a substantially T-shaped pipe, as exemplified in 1A is shown. Two at an angle of, for example, about 90 ° extending pipe sections of the T-shaped pipe form in 1A the inlet and the outlet of the flow channel, and the third piece of pipe forms the receiving space 206 for receiving the shut-off element in the blocking position. The shut-off element may be formed as a closing tube, which is arranged in the passage tube of the T-shaped pipe and is displaceable along the passage tube. In the locked position, the closing tube is pushed in front of the outgoing pipe section of the T-shaped pipe and seals it from the passage pipe. Such an embodiment of the invention is in the 1A and 1B shown. It will be apparent to those skilled in the art that the outgoing tube does not necessarily branch at 90 ° from the passageway but that other angles are possible, for example 80 ° or less, 60 ° or less, or 30 ° or less, and / or 10 ° or more.

A shut-off valve with a valve body 201 , which forms a T-shaped pipe is particularly easy to manufacture and assemble.

The valve body 201 can the recording room 206 for receiving the shut-off element 110 in the release position II exhibit. Alternatively or additionally, the valve body 201 with a cap 220 be closed, which is preferably removable, for example, for maintenance or replacement of the shutoff 110 , The cap 220 can at a pipe end of the valve body 201 be attached and close this tightly. For example. is the cap 220 attached to a pipe end, which is the receiving space 206 of the shutoff element 110 in the release position II formed.

The cap 220 can be a pipe end of the valve body 201 close that along the direction of movement X the shut-off element runs, so that the shut-off element 110 on the cap 220 to and from the cap 220 is moving away.

In some embodiments, which may be combined with other embodiments, the valve body is 201 with a cap 220 closed, through which extends a drive member for adjusting the shut-off valve between the blocking position and the release position. For example, an axis of a drive for adjusting the shut-off element extends 110 through the cap 220. In this case, the cap points 220 a tight passage for the drive part on.

In some embodiments, the shut-off element is 110 by means of an actuating element 217 outside the fitting housing 201 is arranged and with the shut-off 110 is operatively connected, adjustable from the blocking position to the release position and vice versa. The actuator 217 can be, for example, a rotary handle. Preferably, but not necessarily, is the actuator 217 operated by hand. A manually operable actuator is appropriate because typically no large forces are required to operate the shut-off valve according to the invention. Alternatively or additionally, the shut-off element is, for example, movable by means of a motor. Alternatively or additionally, the shut-off element is hydraulically or pneumatically movable, for example by at least one hydraulic or pneumatic cylinder. Remote control operation and / or actuation by means of, for example, a programmable controller are possible. Alternatively or additionally, the shut-off is movable servo-assisted. It is also possible to perform or assist a movement of the shut-off element by the inertia of the medium, which can exert a pressure on the shut-off element.

In some embodiments, which can be combined with other embodiments, the shut-off valve has a rotary drive with an outside of the fitting housing 201 protruding axis of rotation 210 for moving the shutoff element 110 between the blocking position I and the release order II by rotation of the axis of rotation 210 on. The rotary drive can be used to convert the rotational movement of the axis of rotation into the sliding movement of the shut-off element 110 along the direction of movement X be furnished.

For example, the rotary drive is designed as a spindle drive. In this case, a threaded spindle of the rotary drive cooperates with the shut-off element such that the rotation of the threaded spindle is converted into a linear movement of the shut-off element. The threaded spindle can engage in a threaded bore which is provided on the shut-off element. If the shut-off element is designed as a closing tube, the threaded bore may be provided on an end of the closing tube facing away from the flow channel, for example in a connecting element such as a holding plate arranged there.

The rotation axis 210 the rotary drive can via a sealing trained passage to the outside of the valve body 201 be led out and an actuator 217 such as having a twist grip for actuation. For example, the axis of rotation runs 210 through a cap 220 , which may be attached to one end of the fitting housing and can close an interior of the fitting housing. Such a trained rotary drive is particularly easy to manufacture and in an exact manner by hand or motorized.

In some embodiments, a bearing (in 1A not shown) may be provided, which acts between a first contact surface of the rotary drive and a second contact surface of the valve body. The bearing can be designed to receive axial forces between the rotary drive or the shut-off element and the fitting housing 201 or the cap 220 can act. (Please check)

For example, the bearing between a mounted on the axis of rotation in the interior of the fitting housing paragraph and an inner wall of the valve body or an inner wall of the cap 220 arranged. From the shut-off in the direction of movement X Outgoing axial forces are then transferred to the inner wall of the cap with low friction via the bearing.

In some embodiments, the bearing is designed as a ball bearing.

To further facilitate the adjustment of the shut-off between the blocking position I and the release order II can be an axial guide for guiding the shut-off element 110 relative to the valve body 201 in the direction of movement X be provided. The axial guide may be arranged in pipelines with a circular cross-section such that it causes a rotation of the shut-off element 110 around its own axis relative to the valve body 201 during an axial movement restricts or completely inhibits. For example, the axial guide has a groove in an inner wall of the fitting housing, into which a projection of the shut-off element engages during the adjustment from the locking position into the release position and vice versa. Alternatively, the axial guide has a pin extending in the direction of movement, which engages in a guide provided on the shut-off element.

The 2A and 2 B show a further embodiment of a shut-off valve according to the invention 300 , The shut-off valve indicates that of the entrance 101 to the finish 102 extending flow channel 105 for the flow medium. The shut-off element 110 is between the locked position I in which there is the flow channel 105 locks, and the release position II in which there is the flow channel 105 releases, in the direction of movement X displaceable.

2A shows the shut-off valve 300 in the locked position I , and 2 B shows the shut-off valve in the release position II , In the locked position I is the departure 102 of the flow channel 105 on an outer side wall of the shutoff element 110 between the (at least) two seals 112 . 114 and is about the two seals 112 . 114 opposite the entrance 101 sealed. The two seals 112 . 114 circulate the shut-off 110 , The shut-off valve 300 may be any other features of the shut-off valve described above 100 which are not recited here to avoid repetition. In particular, the entrance and exit are interchangeable.

Analogous to the in 1A embodiment shown, the shut-off element 110 a passage opening 115 for the flow medium, in particular in the blocking position I a fluid connection between two opposite sides of the shut-off element 110 in the direction of movement X provides. The actuation of the shut-off element 110 starting from the blocking position I is facilitated by this symmetrical pressure loading of the shutoff. Furthermore, the pressure of leaving 102 preferably rotationally symmetrical with respect to the axis of the shut-off element on the outer wall of the shut-off element between the two seals 112 . 114 issue. Reference is made to the above statements.

At the entrance 101 can the flow medium in the blocking position I under a high relative pressure relative to the outlet 102 and / or relative to the environment. The relative pressure may be, for example, 1 bar or more, 5 bar or more, 10 bar or more, 20 bar or more, or even 100 bar or more, depending on the piping system in which the shut-off valve is used.

Unlike the in 1A the embodiment shown, the flow channel runs 105 essentially linear between the entrance 101 and the departure 102 ( "Through design"). For example, that is through the shut-off 110 lockable flow channel 105 designed as a straight through pipe, in particular with a substantially constant channel cross-section. A linear flow channel 105 passing through the valve body 201 is trained in the release position II a reduced obstacle for a cleaning or inspection device such as a pig.

In particular, the shut-off 110 be designed such that it in the release position II the inner diameter or the clear width of the flow channel hardly or not at all changed or reduced. In particular, in the release position the shut-off bar hardly attacks or not at all in the flow channel. The through the valve body 201 trained flow channel 105 forms in the release position, in particular if it runs linearly, in this case, no obstacle to an inspection device and is particularly well piggable.

For example, the shut-off element shoots in the blocking position I a straight pipe completely and is in the release position, the straight pipe completely free, without interfering with the flow channel. According to a first alternative, the shut-off element is completely moved out of the flow channel in the release position. According to a second alternative, in 2 B is shown, the shut-off element has a running in the direction of the flow channel channel opening 301 on, in the release position II aligned or substantially congruent with the flow channel 105 is, so the shut-off 110 the clear width of the flow channel hardly affected. In this case is in the release position II a first part of the shut-off element is arranged on a first side of the flow channel and a second part of the shut-off element is arranged on a second, opposite side of the flow channel.

In some embodiments, at the shut-off element 110 At least one guide, for example. In the form of a guide plate or a plurality of baffles, be arranged, which is shaped so that they are in the release position II directs the flow medium according to the course of the flow channel. The guiding devices can be provided for this purpose in the release position II an inflow of the flow medium into the passage opening 115 or in a transverse to the flow channel receiving space 206 to reduce the absorption of the shut-off. In some embodiments, at least one guide may have one or more openings through which the passage opening 115 the shutoff in the locked position I runs.

A guide 310 in the form of a baffle with openings 311 is in 2A and 2 B indicated schematically.

In 2A is shown in dashed lines (see reference numeral 315 ), that the passage opening 115 of the shutoff element 110 in the locked position I a fluid connection between the input 101 and the two sides of the shut-off element 110 in the direction of movement X manufactures while the finish 102 through the two seals 112 . 114 opposite the entrance 101 is sealed.

In some embodiments, the direction of movement is one X of the shutoff element 110 at an angle to the direction of extension of the entrance 101 and / or departure 102 , for example, an angle of 30 ° or more. In the case of a straight through flow channel 105 as he exemplifies in 2A is shown, the direction of movement X have an angle of 30 ° or more, 45 ° or more, 60 ° or more or about 90 ° to the flow channel. In 2A is the angle between the flow channel 105 and the direction of movement X between 30 ° and 60 °.

This in 2A shown valve body 201 has an oblique seat tube 305 at an angle with the passageway of the linear flow passage 105 is connected, and in which the shut-off 110 in the direction of movement X is kept movable.

In the locked position I is the shut-off element 110 such in the oblique seat tube 305 arranged that it is the flow channel 105 closes. This is the departure 102 between the two seals 112 . 114 on which the shut-off element 110 circulate.

The inner diameter of the oblique seat tube 305 may be larger than the inner diameter of the flow channel. The geometry of the oblique seat tube does not necessarily correspond to the geometry of the flow channel.

The two seals 112 . 114 act in the locked position I between an outer wall of the shut-off element 110 and an inner wall of the oblique seat tube 305 and seal the finish 102 opposite the entrance 101 from. The first seal 112 seals a direct path between the entrance 101 and the departure 102 and the second seal seals an indirect path between the entrance and the exit through the port 115 would lead.

The oblique seat tube 305 Can be attached to at least one end with an optional removable cap 220 be closed, which allows the maintenance and / or replacement of the shut-off. The cap can be the oblique seat tube 305 also permanently closed, for example, be welded to one end of the oblique seat tube.

To move the shut-off element 110 along the oblique seat tube 305 in the direction of movement X may be provided externally operable drive, for example. A rotary drive, in particular a spindle drive. An axis of rotation of the rotary drive may pass through a wall or cap which closes one end of the oblique seat tube. There may be provided a bearing between the rotary drive and the oblique seat tube. In this context, reference is made to the above statements, which are not repeated here.

3 is a schematic sectional view of another embodiment of a shut-off valve 400 in the release position II in which the shut-off element 110 the flow channel 105 releases. The basic structure of the shut-off valve 400 corresponds to the basic structure of the shut-off valve 100 of the 1A , so that reference can be made to the above statements.

In some embodiments, which may be combined with other embodiments, one is on an inner wall of the fitting housing 201 provided receiving space for reducing or avoiding a contact pressure between at least one of the two seals 112 . 114 and the inner wall of the valve body 201 in the release position II intended. The receiving space may be as one or more wells 402 for receiving one or more seals in the release position II be provided. For example. has the inner wall of the valve body 201 at those positions where in the release position II each one of the two seals 112 . 114 is arranged, each having a circumferential recess or groove for receiving a respective seal. The bottom of the wells 402 For example, it can be recessed by 0.5 mm or more, in particular 2 mm or more, relative to the adjoining inner wall of the fitting housing, the depth of the depressions depending on the dimensions of the seals and the shut-off element.

At the in 3 shown embodiment are two in the direction of movement X spaced pits 402 provided, the distance to the axial distance between the first seal 112 and the second seal 114 equivalent. The wells 402 can, for example, each in the recording room 206 be provided circumferentially for receiving the shutoff in the release position on the inner wall.

In this way, a "caking" of the seals on the inner wall of the valve body can be reduced or avoided, for example. When the shut-off over a longer period in the release position II located.

According to some embodiments that may be combined with other embodiments, at least one is on the shut-off element 110 arranged and with this movable scraper element 404 for cleaning a sealing surface on an inner wall of the fitting housing 201 intended. The stripping element 404 can be circumferential to the shut-off 110 be provided, for example. In the form of a scraper ring. In some embodiments, more than one wiper element is on the shut-off element 110 provided, for example, a stripping element per seal for cleaning that sealing surface against which the respective seal in the locked position.

The stripping element 404 can be formed, for example, from a plastic, in particular from POM (polyoxymethylene).

When moving the shut-off element 110 starting from the release position II in the direction of the blocking position I can the stripping element 404 in the direction of movement X in front of at least one of the two seals 112 . 114 Run along and at least partially circumferentially on the inner wall of the valve body 201 issue. The stripping element contacts 404 the sealing surface on the inner wall of the valve body 201 time before the appropriate seal and cleans them.

For example, this cleans in 3 shown stripping 404 the sealing surface on the inner wall of the entrance 101 with which the first seal 112 in the locked position I comes into contact. This sealing surface may be particularly susceptible to contamination, since it is located on the flow channel and can regularly come into contact with the flowing flow medium.

According to some embodiments that may be combined with other embodiments, the shut-off valve may include a guide 406 have, which at the shut-off 110 can be dissuaded. The guide 406 serves to direct the flow medium according to the course of the flow channel 105 in the release position II ,

For example, the guide is 406 provided as baffle, baffle or baffle. The guide 406 can have one or more openings 407 comprising a portion of the passage opening 115 through the shut-off element 110 can form. The openings 407 represent in the embodiment of 3 a fluid connection between the input 101 and a central portion of the through hole 115 ago.

The guide 406 can be a curvature of the flow channel 105 passing through the valve body 201 is given, simulate, so that the flow medium flows along the flow channel and not or hardly into the through hole 115 flows. In particular, the openings 407 in the guide 406 have a smaller (total) area than a central portion of the passage opening 115 , The guide can thus represent a local constriction of the passage opening in the initial region in order to reduce an influx of the flow medium.

4 shows a schematic sectional view of another embodiment of a shut-off valve 500 , The shut-off valve 500 is in the locked position I shown in which the shut-off 110 blocks the flow channel. With regard to the course of the flow channel, this embodiment corresponds to the in 2A Shut-off valve shown 300 , so that reference can be made to the above statements. The shut-off valve 500 may have some or all of the features described above in any combination that will not be repeated here. In particular, a substantially linear of the entrance 101 to the finish 102 extending flow channel may be provided in the manner of a straight passage tube.

Preferably, the shut-off element engages 110 in the release position not in the flow channel and thus forms in the release position no obstacle to an inspection device such as a pig. For example, the shut-off element 110 arranged in the release position completely on one side of the flow channel, for example. Above the flow channel in the embodiment of the 4 ,

A vertical tube 505 (or a slant pipe) along which the shut-off 110 is movable, is perpendicular (or oblique) relative to the flow channel 105 , Along the vertical tube 505 is the shut-off element 110 for blocking the flow channel in the flow channel into movable, for example. At an angle of about 90 ° relative to the flow channel. It will be apparent to those skilled in the art that instead of the vertical tube 505 a diagonal tube similar to that in 2A Shut-off valve shown may be provided which may extend at an angle of less than 90 ° relative to the flow channel, for example. An angle of 30 ° or more and 80 ° or less.

The vertical tube 505 or inclined tube can at least one end of a cap 220 be closed, the removable on the vertical tube 505 may be attached or alternatively may be integrally connected to the vertical tube. The cap 220 can the vertical tube 505 close tightly. A rotary drive for moving the shut-off element 110 can get through the cap 220 extend through.

In some embodiments, which may be combined with other embodiments, the shut-off element becomes 110 of (at least) two seals 112 . 114 circulate. In the locked position I is the departure 102 (or alternatively the inlet) between the two seals 112 . 114 on an outer wall of the shut-off element 110 ,

At least one of the two seals 112 . 114 can the shut-off 110 rotate at an angle. In particular, at least one of the two seals rotates 112 . 114 the shut-off element 110 at an angle α relative to the direction of movement X , The angle α may be, for example, 20 ° or more and / or 70 ° or less. In some embodiments, both seals circulate the shut-off element at an angle, for example at the same angle or at different angles relative to the direction of movement X ,

At least one of the two seals (the first seal 112 in 4 ) rotates while the shut-off 110 in the locked position I so oblique that a first page 501 the first seal 112 on a first side of the flow channel on the inner wall of the vertical tube 505 is present, and a second page 502 the first seal 112 on an opposite second side of the flow channel on the inner wall of the vertical tube 505 is applied. The dimension of a projection of the first seal 112 on the direction of movement X is greater than or equal to an inner diameter of the flow channel. Due to the oblique course of the first seal 112 will be in the locked position I the direct path between the entrance 101 and the departure 102 sealed. The second seal 114 seals an indirect path between the entrance 101 and the departure 102 from passing through the passage opening 115 would pass through.

Thus, in accordance with some embodiments, a shut-off valve 500 provided, the valve body 201 having a straight pipe as a flow channel which can be shut off with a movable perpendicular to the course of the straight pipe shut-off. The pressure of the entrance 101 can rest in the passage opening of the shut-off, and the pressure of the outlet 102 may rest against a space region surrounding the shut-off element between two seals, of which at least one seal has an oblique course relative to the axis of the shut-off element.

It will be apparent to those skilled in the art that other angles between the passageway and the helical tube or other angles between the seals and the direction of extent of the helical tube are possible.

5 a schematic sectional view of another embodiment of a shut-off valve 600 in the locked position I ,

The shut-off valve 600 may be arranged for attaching a lock element (not shown) and have a receptacle for the lock element. When attached lock element, the shut-off 110 at pressurized flow channel 115 from the Valve body removed and / or introduced into the valve body, for example for maintenance, repair or replacement. A maintenance option with pressurized flow channel, in particular when flowing along the flow channel flow medium, has the advantage that the flow channel does not need to be shut off otherwise, so that a repair or replacement of the shut-off quickly and easily be performed.

The valve body can move in the direction of movement X extending channel area 605 have, for example, a vertical or inclined tube, in which the shut-off 110 is received and along the shut-off between the blocking position I and the release order II is mobile. In some embodiments, there is an end 606 of the channel area 605 with a cap 610 locked. For removal of the shutoff element 110 can the cap 610 from the end 606 of the channel area 605 be removable.

In some embodiments, the cap is 610 an inside threaded in the end of the channel cap.

At the end 606 of the channel area 605 For example, a fastening section for fastening the lock element can be provided. For example, the attachment portion has a plurality of attachment elements such as blind holes 607 on, for example, the cap 610 annularly encircling at the end 606 can be arranged. About the blind holes 607 the lock element can be screwed sealingly. An internal volume of the lock element can communicate with the interior of the channel area 605 aligned. The lock element allows the replacement of the shutoff element under pressure in the valve body.

To remove the shut-off element, the shut-off element can be moved into the open position, and the lock element can be at the end 606 of the channel area 605 be attached. The lock element comprises, for example, a tubular inner volume for receiving the shut-off element, a first closable end for attachment to the channel region 605 and a second closable end.

The second end of the lock element is closed and the shut-off element is moved over the first end starting from the fitting housing in the direction of movement X moved into the interior volume of the lock element. The inner volume of the lock element is pressurized. Subsequently, the first end of the lock element is closed. The second end of the lock element can now be opened and the shut-off element removed, since there is no fluid connection between the interior of the fitting housing and the inner volume of the lock element.

The shut-off valve according to the invention is particularly suitable for use in combination with a lock element, since a removal of the shut-off element in axial alignment between the channel region and the lock element in the direction of movement X the shutoff is possible.

The introduction of a shut-off element in the channel region, eg. After repair or replacement, by means of the lock element can be done in the reverse manner.

The shut-off valve 600 may otherwise correspond to one of the shut-off valves described above or have any combination of the features described above, reference being made to avoid repetition of the above statements. By way of example, the shut-off valve corresponds 600 essentially the in 4 shown shut-off valve with vertical tube.

According to a further aspect, the invention relates to a valve arrangement, comprising: a shut-off valve according to one of the described embodiments and a lock element, which is adapted for attachment to the shut-off valve for removal of the shut-off element with pressurized flow channel.

According to a further aspect of the invention, a method for actuating a shut-off valve, in particular a shut-off valve described herein 100 . 300 . 400 . 500 described. The shut-off valve comprises one of an input 101 to a departure 102 extending flow channel 105 for a flow medium and a shut-off element for the preferably sealing blocking of the flow channel 105 ,

The method includes shifting the shut-off element 110 in a direction of movement X between a blocking position I in which the shut-off element blocks the flow channel, and a release position II in that the shut-off element releases the flow channel while a passage opening extending through the shut-off element 115 a fluid connection for the flow medium between two opposite sides of the shut-off element 110 in the direction of movement X manufactures. In particular, the fluid connection is made during the entire displacement process.

In the following, the present invention is briefly summarized again:

The present invention is based on the problem of constructing a shut-off valve which can be operated manually even at high pressures. One goal is to reduce or eliminate the differential forces on the closing body. The friction on the sealing elements is lower, which makes the fitting more durable and thus reduces costs.

Claimed is a shut-off valve with a cylindrical tube as shut-off (closing tube) for a pipeline with liquid or gaseous substances. In this case, two or more circumferential seals are circumferentially mounted around the closing tube. Between the seals is the inlet or outlet of the valve.

According to the invention, the problem of friction between the closing body and the sealing element is achieved in that the pressure on the entire closing element is not symmetrical, as usual, but symmetrical. As a closing body therefore no ball or plate is used but a coaxial inserted into the media tube closure tube. This is always acted upon in every position in by the medium. The sealing of this closure tube from its inside to the outside, preferably takes place at its tube ends by means of circumferential sealing elements.

If the closing tube is pushed in its media pipe before the departure, which then sits between the sealing elements, the pipe is on the outside between the seals without pressure or has the pressure of the outflowing pipe. On the inside it is pressurized. Both pressures are symmetrical on the closing tube. The closing tube hovers approximately and is not pressed in one direction. However, the differential pressure loads the annular sealing elements of the closing tube and thereby increases the friction when moving the closing tube proportional to the pressure. However, this friction is many times lower than with conventional valves. Since the housing is also a pipe, the housing tube can be designed so that it can be opened on the front side. As a result, the closing tube can be removed for revision, as the reciprocating piston from its cylinder in the internal combustion engine.

1A shows a coaxial cock in corner construction.

The housing is a tee. One end of the through-tube may be capped. In the passage tube, the closing tube can sit. This can be connected via a drive shaft with a control element. The drive shaft may be hermetically sealed to the cap with one or more elastomers. The closure tube may also be sealed to the tee interior / passageway at both ends. In 1A the locking tube is in the locked position or closed position. The valve is equally tight in both directions. In this case, the closure tube is always independent of the pressure in a "limbo", ie it is not like the closing body conventional shut-off valves pressed by the media pressure in one direction, as it rests rotationally symmetrical on the closing tube. This allows the closing tube - regardless of pressure - to be moved by hand at any time.

If the closing tube is moved to the right via the operating element and the drive shaft until it stops, the medium can flow in both directions, as in 1B is shown.

6 shows a coax cock 700 in transit construction. At a Schrägsitzrohr housing the media tube is connected on both sides. Otherwise, the components behave accordingly 1A ,

LIST OF REFERENCE NUMBERS

100

Shut-off

101

entrance

102

leaving

105

flow channel

110

shut-off

112, 114

two seals

112

first seal

114

second seal

115

Through opening

201

fitting housing

206

Receiving space for receiving the shut-off element

210

axis of rotation

212

spindle drive

217

jig

220

cap

300

Shut-off

301

Canal opening

305

Angle seat tube

310

guide

311

opening

315

fluid communication

400

Shut-off

402

deepening

404

stripping element

406

guide

407

opening

500

Shut-off

501

first side of the seal

502

second side of the seal

505

vertical pipe

600

Shut-off

605

channel area

606

End of the channel area

607

Blind holes

610

cap

700

Coaxial tap or shut-off valve

I

blocking position

II

release position

X

movement direction

α

angle

Claims (18)

Shut-off fitting with a shut-off element (110) having a through-opening (115) for a pipeline, two circumferential seals (112, 114) being fitted around the shut-off element (110) and the outlet (102) or the inlet (101) of the shut-off fitting (100) lies between the two circumferential seals (112, 114). Shut-off valve to Claim 1 in which the shut-off element (110) having the passage opening (115) is a closing tube, in particular a cylindrical tube, such as a circular-cylindrical tube. Shut-off valve to Claim 1 or 2 wherein the shut-off fitting has a flow channel (105) for a flow medium extending from the inlet (101) to the outlet (102), the shut-off element (110) interposing a blocking position (I) in which it blocks the flow channel (105), and a release position (II) in which it releases the flow channel (105), in a direction of movement (X) is displaceable, and wherein in the blocking position (I) of the outlet (102), or alternatively the input, of the flow channel (105) on an outer side wall of the shut-off element (110) between the two circumferential seals (112, 114) and on the two circumferential seals (112, 114) opposite the entrance (101), or alternatively the outlet, is sealed. Shut-off valve (100), in particular according to one of the preceding claims, comprising: a valve body (201) forming a flow channel (105) for a flow medium extending from an inlet (101) to an outlet (102); and a shut-off element (110), wherein the shut-off element (110) between a blocking position (I) in which it blocks the flow channel (105) for the flow medium, and a release position (II), in which it releases the flow channel (105) for the flow medium, in a direction of movement ( X) is displaceable, the shut-off element (110) having a flow medium passage (115) providing fluid communication between two opposite sides of the shut-off element (110) in the direction of movement (X). Shut-off valve to Claim 3 or 4 , wherein the passage opening (115) extends in the direction of movement (X) through the shut-off element (110) and in the blocking position (I) a fluid connection between a receiving space (206) for receiving the Absperrelements and the input (101), or alternatively the outflow (102), the flow channel provides. Shut-off valve to Claim 4 or 5 wherein the shut-off element (110) of two seals (112, 114) is circulated, which act in the blocking position (I) between each outer wall of the shut-off (110) and an inner wall of the valve body (201) and the input (101) of seal off the outlet (102). Shut-off fitting according to one of the preceding claims, wherein in the blocking position (I), the passage opening (115) of the shut-off element is in fluid communication with the inlet (101) of the fluid channel, and / or a space region between the two seals (112) surrounding the shut-off element (110) , 114) is in fluid communication with the outlet (102) of the fluid channel, or vice versa. Shut-off fitting according to one of the preceding claims, characterized by at least one depression (402) provided on an inner wall of the fitting housing (201) for reducing or avoiding a contact pressure between at least one of the two seals (112, 114) and the inner wall of the fitting housing (201) the release order (II). Shut-off fitting according to one of the preceding claims, characterized by at least one wiper element (404) arranged on the shut-off element (110) and movable therewith for cleaning a sealing surface on an inner wall of the fitting housing (201). Shut-off fitting according to one of the preceding claims, characterized by a rotary drive, in particular a spindle drive (212), with a rotation axis (210) projecting outside the fitting housing (201) for moving the shut-off element (110) between the blocking position (I) and the release position (II ) by rotation of the rotation axis (210). Shut-off valve to Claim 10 , characterized by a bearing acting between a first contact surface of the rotary drive and a second contact surface of the valve body bearing, in particular ball bearings. Shut-off fitting according to one of the preceding claims, characterized by an axial guide for guiding the shut-off element (110) relative to the fitting housing (201) in the direction of movement (X), in particular comprising a pin guide or a groove guide. Shut-off fitting according to one of the preceding claims, characterized by a guide device (406) attached to the shut-off element (406), in particular in the form of a guide plate, for directing the flow medium past the shut-off element (110) according to the course of the flow channel (105) in the release position ( II). Shut-off fitting according to one of the preceding claims, wherein the inlet (101) and the outlet (102) enclose an angle of 45 ° or more, in particular approximately 90 °, relative to each other, and wherein the direction of movement (X) of the shut-off element (110) along the Inlet (101), or alternatively along the outlet, runs, in particular wherein the fitting housing (201) forms a T-shaped pipe. Shut-off valve according to one of Claims 1 to 13 wherein the flow channel (105) extends substantially linearly between the inlet (101) and the outlet (102), and wherein the direction of movement (X) of the shut-off element (110) at an angle of 30 ° or more, in particular approximately perpendicular to the Flow channel (105) extends. Shut-off fitting according to one of the preceding claims, wherein the shut-off element (110) is circulated by two seals (112, 114), wherein at least one of the two seals (112, 114) forms the shut-off element (110) at an angle of 20 ° or more and / or or 70 ° or less relative to the direction of movement (X). Valve assembly comprising a shut-off valve according to one of the preceding claims and a lock element which is adapted for attachment to the shut-off valve for removal of the shut-off element with pressurized flow channel. Method for actuating a shut-off valve, in particular a shut-off valve according to one of Claims 1 to 16 wherein the shut-off valve comprises a flow channel (105) for a flow medium extending from an inlet (101) to an outlet (102) and a shut-off element (110) for blocking the flow channel (105), comprising: displacing the shut-off element (110) in one Movement direction (X) between a blocking position (I), in which the shut-off element blocks the flow channel, and a release position (II), in which the shut-off element releases the flow channel, while a passage opening (115) extending through the shut-off element, a fluid connection for the flow medium between two opposite sides of the shut-off element (110) in the direction of movement (X).

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