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DE-102023105457-B4 - Valve for a fluid line, valve system and method for operating a valve

DE102023105457B4DE 102023105457 B4DE102023105457 B4DE 102023105457B4DE-102023105457-B4

Abstract

Valve (100) for a fluid line, comprising - a housing (10) with a fluid inlet (11), a fluid outlet (12) and a fluid line (13) for conveying a fluid from the fluid inlet (11) to the fluid outlet (12), - a piston (15) arranged in the housing with a sealing surface (16) which, in an open position, releases the fluid outlet (12) for the passage of the fluid and, in a closed position, closes the fluid outlet (12) to block the passage of the fluid, - wherein the piston (15) is guided axially and rotatably or rotatably for movement between the open position and the closed position via a drive shaft (14) of a valve system (200), - a first through-body (17) arranged in the fluid line (13), which is statically fixed inside the housing (10) and which has at least one static through-opening (18) for conveying the fluid from the fluid inlet (11) to the fluid outlet (12), - a second passage body (19) which is guided axially and rotatably or rotatably within the first passage body (17) via the piston (15) and/or via the drive shaft (14) and which has at least one dynamic passage opening (20) for conveying the fluid from the fluid inlet (11) to the fluid outlet (12), - wherein the piston (15) and the second through-body (19) are coupled to the drive shaft (14) of the valve system (200), and - wherein the second passage body (19) can be axially displaced and rotated or rotated relative to the first passage body (17) by means of the piston (15) and/or the drive shaft (14) such that, in a flow position of the second passage body (19), the at least one dynamic flow opening (20) of the second passage body (19) for the passage of the fluid is at least partially aligned with the at least one static flow opening (18) of the first passage body, and that, in a blocking position of the second passage body (19), the second passage body (19) of the first passage body (17) to block the passage of the fluid.

Inventors

  • Jürgen Selent

Assignees

  • HHMW GmbH & Co. KG

Dates

Publication Date
20260513
Application Date
20230306

Claims (17)

  1. Valve (100) for a fluid line, comprising: - a housing (10) with a fluid inlet (11), a fluid outlet (12) and a fluid line (13) for conveying a fluid from the fluid inlet (11) to the fluid outlet (12); - a piston (15) arranged in the housing with a sealing surface (16), which in an open position releases the fluid outlet (12) for the passage of the fluid and in a closed position closes the fluid outlet (12) to block the passage of the fluid; - wherein the piston (15) is guided axially and rotatably or rotatably for movement between the open position and the closed position via a drive shaft (14) of a valve system (200); - a first passage body (17) arranged in the fluid line (13), which is statically fixed within the housing (10) and which at least The valve system (200) has a static through-opening (18) for conveying the fluid from the fluid inlet (11) to the fluid outlet (12), - a second through-body (19) which is guided axially and rotatably or rotatably within the first through-body (17) via the piston (15) and/or the drive shaft (14) and which has at least one dynamic through-opening (20) for conveying the fluid from the fluid inlet (11) to the fluid outlet (12), - wherein the piston (15) and the second through-body (19) are coupled to the drive shaft (14) of the valve system (200), and - wherein the second through-body (19) can be axially displaced and rotated or rotated relative to the first through-body (17) by means of the piston (15) and/or the drive shaft (14) such that in a through-opening position of the second through-body (19) the at least one dynamic The passage opening (20) of the second passage body (19) for the passage of the fluid is arranged at least partially in alignment with the at least one static passage opening (18) of the first passage body, and that in a blocking position of the second passage body (19) the second passage body (19) closes the at least one static passage opening (18) of the first passage body (17) to block the passage of the fluid.
  2. Valve (100) after Claim 1 , characterized in that the first through-body (17) is cylindrical and has a plurality of static through-openings (18) and that the second through-body (19) is cylindrical and has a plurality of dynamic through-openings (20), wherein the second through-body (19) is guided axially and rotatably within the first through-body (17) via the piston (15) and/or via the drive shaft (14) and rests axially and rotatably against the first through-body (17) inside the first through-body (17) or wherein the second through-body (19) is guided rotatably within the first through-body (17) via the piston (15) and/or via the drive shaft (14) and rests rotatably against the first through-body (17) inside the first through-body (17).
  3. Valve (100) after Claim 1 or 2 , characterized in that the outer wall of the second passage body (19) movably abuts the inner wall of the first passage body (17) in a sealing manner.
  4. Valve (100) according to at least one of the preceding claims, characterized in that the at least one static through-opening (18) has an elongated, a spiral, an oval, an angular and/or a circular shape and that the at least one dynamic through-opening (20) has a shape similar to that of the at least one static through-opening (18).
  5. Valve (100) according to at least one of the preceding claims, characterized in that the cross-sectional area of the at least one static through-opening (18) decreases from the outer wall of the first through-body (17) to the inner wall of the first through-body (17), in particular decreases uniformly.
  6. Valve (100) according to at least one of the preceding claims, characterized in that the at least one static through-opening (18) and/or the at least one dynamic through-opening (20) is inclined to the axis of rotation of the piston (15).
  7. Valve system (200) for a fluid line for regulating the flow of a fluid, comprising a valve (100) after one of the Claims 1 until 6 , wherein the second passage body (19) is guided axially and rotatably within the first passage body (17) via the piston (15) and/or via a drive shaft (14), and a drive (23) with an axially and rotatably mounted drive shaft (14), wherein the piston (15) of the valve (100) is coupled at least indirectly to the drive shaft (14) of the drive (23), or, a valve (100) according to one of the Claims 1 until 6 , wherein the second passage body (19) is rotatably guided within the first passage body (17) via the piston (15) and/or via a drive shaft (14), and a drive (23) with a rotatably mounted drive shaft (14), wherein the piston (15) of the valve (100) is coupled at least indirectly to the drive shaft (14) of the drive (23).
  8. Valve system (200) according to Claim 7 , wherein the actuator (23) has at least one spring element (21), and wherein the at least one spring element (21) is arranged within the actuator (23) such that it can be biased upon movement of the piston (15) of the valve and/or a drive piston (35) of the actuator (23) in the direction of the opening position in order to exert a force on the piston (15) of the valve and/or on the drive piston (35) of the actuator (23) in the direction of the closing position of the piston (15).
  9. Valve system (200) according to one of the Claims 7 and 8 , characterized in that connections (22), in particular fluid connections, are provided for driving the drive shaft (14).
  10. Valve system (200) according to at least one of the Claims 7 until 9 , characterized in that the drive (23) of the valve system (200) for axially and rotatably or rotatably driving the drive shaft (14) is arranged within the housing (10) of the valve (100).
  11. Valve system (200) according to at least one of the Claims 7 until 10 , characterized in that the drive has a drive piston (35) which is coupled at least indirectly to the piston (15) of the valve (100), wherein the drive piston (35) and the drive shaft (14) of the drive (23) each have a steep thread which is provided with a right-hand or left-hand pitch.
  12. Valve system (200) according to at least one of the Claims 7 until 11 , characterized in that at least one hydraulic device is arranged within the housing (10) of the valve (100) such that the piston (15) of the valve (100) can be moved back and forth between the closed position and the open position by means of it.
  13. Valve system (200) according to at least one of the Claims 7 until 12 , characterized in that the valve system (200) further comprises a control unit, wherein the control unit is configured to control the drive shaft (14), in particular the drive (23) of the valve system (200), in order to move the piston (15) of the valve (100) between an opening position and a closing position, in particular continuously, and to move the second passage body (19) of the valve (100) between a flow position and a blocking position, in particular continuously.
  14. Method for operating a valve (100), in particular a valve system (200) according to at least one of the preceding Claims 7 until 13 , for a fluid line according to at least one of the preceding Claims 1 until 6 , comprising the following steps: • a fluid is guided with a defined flow into the housing (10) of the valve (100) through a fluid inlet (11), • the fluid is guided to a first pressure zone (Z1), wherein the first pressure zone (Z1) is arranged upstream of the first passage body (17) in the housing (10) in the flow direction, • the piston (15) of the valve (100) is driven axially and rotatably by means of a drive (23), • wherein the second passage body (19) is guided axially and rotatably within the first passage body (17) via the piston (15) and/or via a drive shaft (14), and the second passage body (19) is guided via the piston (15) of the valve (100) and/or via a drive shaft (14) of a valve system (200), in particular a valve system (200) according to at least one of the preceding Claims 7 until 13 , is guided axially and rotationally movable, or wherein the second passage body (19) is guided rotationally movable via the piston (15) and/or via a drive shaft (14) within the first passage body (17) and via the piston (15) of the valve (100) and/or via a drive shaft (14) of a valve system (200), in particular a valve system (200) according to at least one of the preceding Claims 7 until 13 , is guided rotatably to control, in particular to reduce, a first flow by which the fluid is directed from the first pressure zone (Z1) to a second pressure zone (Z2), wherein the second pressure zone (Z2) is arranged in the flow direction downstream of the at least one dynamic passage opening (20) of the second passage body (19), • the piston (15) of the valve (100) is guided axially and rotatably, or rotatably, in particular via the drive shaft (14) of the valve system (200), to control a second flow by which the fluid is directed from the second pressure zone (Z2) through the fluid outlet (12) of the housing (10), wherein, during the guidance of the second passage body (19), a relative movement of the at least one dynamic passage opening (20) to the at least one static passage opening (18) takes place such that an overlapping area of the at least one dynamic passage opening (20) with the at least one static through-hole (18) can be reduced or enlarged, and wherein there is a pressure difference between the first pressure zone (Z1) and the second pressure zone (Z2).
  15. Procedure according to Claim 14 , characterized in that the pressure difference between the first pressure zone (Z1) and the second pressure zone (Z2) is controlled by the control of the second passage body (19) and/or the piston (15).
  16. Procedure according to one of the Claims 14 or 15 , characterized in that the second passage body (19) is guided axially and rotationally movable within the first passage body (17) via the piston (15) and/or via the drive shaft (14), and the second passage body (19) and the piston (15) of the valve are synchronously synchronized via the drive shaft (14) of a/the valve system (200). are guided axially and rotationally movable, or that the second passage body (19) is guided rotationally movable via the piston (15) and/or via the drive shaft (14) within the first passage body (17), and that the second passage body (19) and the piston (15) of the valve are guided synchronously rotationally movable via the drive shaft (14) of a/the valve system (200).
  17. Procedures according to at least one of the Claims 14 until 16 , characterized in that the piston (15) of the valve (100) is guided from the opening position to release the fluid outlet (12) to the closing position to block the fluid outlet (12) and vice versa, and/or that the second passage body (19) is guided from the passage position to the blocking position.

Description

The invention relates generally to the field of fluid lines, in particular high-pressure fluid lines, such as high-pressure fluid lines for power plants or steam turbines. Specifically, the invention relates to a valve for a fluid line, a valve system with such a valve, and a method for operating such a valve. Valves for regulating, closing, and opening a fluid flow in a fluid line, according to current technology, generally operate with a piston that can move axially between a closed and an open position in the high-pressure fluid line. Two different valve designs are primarily used for this purpose. In one known variant, a piston is extended from a sealing seat to open the valve. Depending on the piston's position, a corresponding opening gap is created, through which the fluid flow rate is regulated. To stop the fluid flow, i.e., to close the outlet, the piston is retracted back into its sealing seat. In a second known variant, a through-flow body is provided, which is installed between a valve train and a valve outlet. In this variant, the piston moves axially within the through-flow body. The further the piston moves from a valve outlet, the larger the flow cross-section of the through-flow body becomes. From the EP 3 708 884 A1 A valve with dynamic flow control is known that utilizes a combination of axially movable and rotatable valve elements to control the fluid flow rate. The valve has two coaxial valve elements, the inner element being both axially and rotatably movable, and the outer element being axially displaceable. The inner valve element is rotatable relative to the outer element to change the overlap of the flow openings. Simultaneously, both valve elements are axially movable and can be moved together with a piston to open the valve. The piston itself moves exclusively axially and regulates the flow rate through its interaction with the valve seat. From the DE 10 2012 006 624 A1 A throttling device with a collector is known. The collector has an inlet and several outlets. A control element in the form of a movable sleeve is arranged in the collector and changes the cross-sections of the openings corresponding to the outlets by means of an axial and/or rotatable movement. Various drives, including a rotatable shaft, are provided for the control. From the WO 89 / 11 609 A1 A control valve is known, consisting of a valve cone assembly with a hollow, cylindrical body and a control slide rotatably arranged within it. Both the cylindrical body and the control slide have openings over an arc-shaped area, the overlap of which regulates the flow rate. The control slide can be rotated to various positions via a spindle. The cylindrical body has a peripheral sealing surface that interacts with the valve seat, corresponding to a piston. To open the valve, the cylindrical body and the control slide are moved axially via the spindle, followed by a rotational movement of the control slide, which regulates the flow rate of the valve in the open position. The cylindrical body is axially movable. However, with known valve designs, very long axial piston travel distances are necessary to completely interrupt or fully release the fluid flow. Long piston travel distances bring many disadvantages, affecting wear, response and control times, as well as efficiency, costs, and risks. The object of the present invention is to at least partially overcome the disadvantages described above for valves in fluid lines. In particular, the object of the present invention is to improve the control of valves in fluid lines, especially in high-pressure fluid lines, particularly by making them faster and more precise. The foregoing problem is solved by a valve for a fluid line having the features of claim 1, by a valve system for a fluid line having the features of claim 7, and by a method for operating a valve for a fluid line having the features of claim 14. Further features and details of the invention will become apparent from the dependent claims, the description, and the drawings. Features and details described in connection with the valve according to the invention naturally also apply in connection with the valve system and/or method according to the invention, and vice versa, so that the disclosure regarding the individual aspects of the invention always refers to, or can refer to, each other. With embodiments of the invention, an improved valve for a fluid line, particularly for a high-pressure fluid line, can advantageously be provided. Such a valve allows for better, and especially faster and more precise, control of the flow rate in a high-pressure fluid line. Furthermore, such a valve can increase the safety of a fluid line. A first aspect of the present invention relates to a valve for a fluid line, in particular for high-pressure fluid lines, such as high-pressure fluid lines for power plants or steam turbines. The valve has the following features: - a housing with a fluid inlet, a fluid outlet and a fluid lin