WO2015197538A1 - Device for bracing in a cavity and method for mounting the device - Google Patents

Abstract

A bracing receptacle is suitable for the centring and force-related support of tools in valve housings (2). During different steps of machining of the valve housing (2), the device (41) can remain as an exactly reproducible tool support in the valve housing (2). An X-Y adjustment slide (A) makes it possible to adjust a centring sleeve (Z) and thus a highly precise reference system with respect to an axis of symmetry of the valve housing (2). The good repeatability in the positioning of tools in the centring sleeve (Z) allows a rapid and reproducible tool change which does not require any further measurement and reorientation. The repeatable tool support provides its advantages in particular in conjunction with a tool changing system for multifunctional machining and measuring tasks. All necessary tools can be docked in a repeatable manner in the centring sleeve Z of the device (41) via a receiving cone. The device (41) furthermore makes it possible to stabilize the tools which are docked in the centring sleeve (Z). The force-related support in the valve housing (2) is in this case also sufficient for machining operations on hardened surfaces.

Description

description

Device for spreading in a cavity and method for mounting the device

The present invention relates to a device for

Expansion in a cavity, in particular in a fitting, in particular a control valve in a power plant, and a method for mounting the device.

In a fitting is, for example, a re ^¬ gelarmatur, a shut-off valve or another assembly with rotationally symmetrical portions as in process technology, in ventilation, air conditioning and heating, in water and power supplies, in chemical plants such as refineries, are used in power plants as steam turbines with ^¬ NEN, in district heating systems or also in pipelines. The term "fitting" is to be understood in the following so very general assemblies and housing with rotationally symmetrical areas. These include, for example, in power plants also preheaters and aftercoolers, as well as valves of all kinds.

Fittings can, with appropriate design, inter alia, for controlling a flow, for closing

Lines or used to reduce pressure. They can also be characterized by mechanical stress during opening and closing, by high pressures, corrosion, changing and high temperatures and other influences of a fluid flowing through the apparatus wear. These can also lead to armored, about

Deposited or otherwise hardened sealing surfaces develop cracks. Since the valves are often indispensable for the operation of the respective system, a shutdown for repair is associated with high costs.

DE 10 2005 004 232 A1 describes a method for repairing a fitting, in which sealing surfaces are crack-free and rigid. tiger, but also to be kept in a well-defined height, which is structurally predetermined. According to DE 10 2005 004 232 A1, a machining area is first removed by machining, whereby cracks are also removed. The cutting removal is accomplished by grinding, turning and / or milling, possibly also in combination. This is followed by build-up welding, which increases the working area beyond a defined height. By final leveling, the machining area is brought to the level before the repair and possibly polished. Before the project stages driving and guiding the appropriate tools are each jus ^¬ advantage. When machining, conventional CNC machining centers are usually used, which can be adapted to the specific requirements of valve machining.

Starting from this prior art, it is an object of the present invention to provide a device for spreading in a cavity and a method for mounting the device, with which manufacturing or repair work can be further simplified and / or shortened.

This object is achieved by a device for spreading in a cavity, in particular in a fitting, in particular a control valve in a power plant, with at least three extendable supports, which are mounted radially to a first axis of symmetry on a base member. The pre ^¬ device further comprises a centering sleeve for a centering ^¬ to rierendes member with an axis of symmetry of the centering sleeve is parallel to the first axis of symmetry. The centering ^¬ sleeve is disposed on an alignment element in an adjustment range in the radial direction can be fixed with wel ^¬ chem the centering sleeve to the first axis of symmetry. In the method for mounting the device in a fitting, in particular a control valve in a power plant, the device is inserted into the fitting. The supports are then extended, causing the device in the fitting is spread. The centering sleeve is fixed in an adjusted outside ^¬ rich so that the symmetry axis of the centering sleeve comes with a central axis of the fitting to cover. The advantages mentioned below need not necessarily be achieved by the subject-matter of the independent patent claims. Rather, these may also be advantages, which are achieved only by individual embodiments, variants or developments.

The device provides a spreading receptacle for the force support of tools in any cavities, for example in valve housings. During different steps of a machining a fitting, the device can remain as exactly reproducible tool support in the valve. The device thus provides a flexible support element in housings of arbitrary dimensions.

The adjustment range is, for example, +/- 3 mm in an X and Y direction. The alignment element is designed, for example, as an X-Y adjustment slide. It allows one

Adjustment of the centering in the adjustment with an accuracy of, for example, 0.01 mm, and thus a hochge ^¬ naues reference system to an axis of symmetry, which is for example predetermined by a rotationally symmetric machining area of the cavity. The good repeat accuracy when positioning tools in the centering sleeve enables a fast and reproducible tool change, which requires no further measurement and realignment. The repeatable tool support unfolded ih ^¬ re advantages in particular in combination with a tool ^¬ change system for multifunctional machining and Messauf gave ^¬. For example, the device is installed immediately behind a valve seat in a valve housing. The Ventilgehäu ^¬ se must now be measured only once, after which the centering means of the alignment member to a symmetry metric axis of the valve body can be automated centered. After this one-time alignment, the device may remain in the housing during the entire refurbishment work. All necessary tools can be docked in the centering sleeve of the device via a pick-up cone with reproducible accuracy.

The device enables exact center alignment of tools which are docked in the centering sleeve. It also provides a reference system with precise repeatability for these tools. The device made ^¬ light further stabilization of the tools which are docked in the centering sleeve. The force support in Ven ^¬ tilgehäuse here is sufficient for metal cutting Bearbeitungsvor- gears hardened surfaces.

The centering sleeve can be spherical gela ^¬ siege in the alignment member. Preferably, the device requires no Zulei ^¬ lines and has no own actuators.

According to one embodiment, the device includes a rotationally symmetrical about the first axis of symmetry arranged hub, in particular a splined hub, and a transmission which allows an extension of the supports by rotation of the hub. This embodiment has the advantage that the Vorrich ^¬ tion can be automatically centered using a suitable tool in a cavity in a cavity by a shaft engages the hub and this rotates. The Ge ^¬ gear, for example, constructed analogously to a three-jaw chuck.

According to another embodiment, the alignment element is a self-locking XY sliding carriage. In a further development, the alignment member to a first drive shaft for a first actuating mechanism for procedural ^¬ ren the centering sleeve in an X-direction within the verse ^¬ tellbereiches. The alignment element continues to point a second drive shaft for a second actuating gear for moving the centering sleeve in a direction orthogonal to the X direction Y direction within the adjustment range. The adjustment range is, for example, +/- 3 mm in both the X and Y directions, with an accuracy of 0.01 mm.

According to one embodiment, the first drive shaft and the second drive shaft each have a mechanical connection for transmitting torque. This embodiment has the advantage that a separate assembly tool can be docked with suitable actuators to the mechanical connections of the first and second drive shaft, where ^¬ by an automated centering of the centering through the assembly tool is possible.

In one development, the device includes a first actuator, which is ver ^¬ connected with the first drive shaft, and a second actuator, which is connected to the second drive shaft. According to one embodiment, the device further comprises a battery for supplying power to the first and second actuator. As a result, the device is enabled to ^move the alignment element itself into the required position. ^Appropriate control data can be received wirelessly.

According to one embodiment, the centering sleeve is shaped as a cone ^¬ shell.

In a development, the centering sleeve is mounted with a spherical compensating element. This has the advantage that angle errors can be ausgegli ^¬ chen during the central alignment.

In a further development of the method of extension of the legs a rotationally symmetrically arranged about the first axis of symmetry hub, in particular a spline hub is rotated where ^¬ extends through a gear which supports. This development allows an automated mounting of the device by rotating a shaft which is positioned in the hub. According to one embodiment the method of the caulking of the device creates a measurement tool, which is mounted in the centering sleeve, a three-dimensional image ei ^¬ nes rotationally symmetrical working area of the fitting. An arithmetic unit calculates from the three-dimensional image the center axis of the fitting, which is the axis of symmetry of the rotationally symmetric machining area. A Steue ^¬ tion controls a first actuator and a second actuator so that a first actuating gear and a second actuating mechanism, the centering sleeve so that the axis of symmetry of the centering comes with the central axis of the valve to cover.

This embodiment enables automated ^{measurement of} a deviation of the centering sleeve from a desired center position. For example, the measuring tool uses a 2D laser scanner, which is rotated on a rotor, to create the three-dimensional image. The measuring tool may be constructed as a mounting tool, wel ^¬ ches provides the shaft for engagement in the hub and continuing terhin via the first and the second actuator is equipped, by means of which can be corrected automatically the alignment member, such as a self-locking XY sliding carriage. The measuring tool can then be released from the device so that it remains passive with the centering centering sleeve in the housing. The same measurement ^¬ tool can also be used for removal of the device.

In a further development, the fitting remains at least partially installed at the point of its operation during the implementation of the method. The device can be used for the centered mounting of tools in a fitting, in particular a control valve in a power plant. In the following, embodiments of the invention will be explained in more detail with reference to figures. In the figures, identical or functionally identical elements are provided with the same reference ^numerals , unless stated otherwise. FIG. 1 shows an embodiment of a device for

 Spreading in a cavity,

Figure 2 is a rear view of the device of FIG

 1,

3 shows a side view of the device from FIG. 1 and FIG. 2, which makes it possible to dock tools with precise repeating accuracy by means of a centering sleeve,

Figure 4 shows an assembly of the device of Figure 1 to FIG

 3 in a fitting,

FIG. 5 shows the device from FIG. 1 to FIG. 3 after it has been installed in a fitting,

Figure 6 shows the device of Figure 1 to Figure 3, after it has been installed in the region of a flange of a control valve, and

FIG. 7 shows a grinding process of a flange surface of a

Fitting in which the device serves to stabilize a grinding tool. Figure 1 shows an embodiment of a device 41 for spreading in a cavity. On a base member B three extendable supports Sl, S2, S3 are mounted. In the middle of the three extendable supports Sl, S2, S3 is a hub N arranged. The extendable supports Sl, S2, S3 can be extended by turning the hub N. The hub N thus serves as a drive introduction for the spreading function of the device 41st

Before the hub N is a centering Z, which by driving two drive shafts Wl, W2, which process an alignment element A in an X-direction and a ortho ^¬ gonal Y-direction in an adjustment of, for example, +/- 3 mm with an accuracy of 0.01 mm fi ^¬ xierbar is. The alignment element A thus enables an automated fine adjustment of the centering Z in the X and Y directions. The centering sleeve Z provides a repeatable tool support in the cavity. It may be spherical in order to compensate for angular errors during center alignment.

Figure 2 shows a rear view of the device 41, the extension of the hub N, a transmission for extending the extendable supports Sl, S2, S3, which has similarities to a three-jaw chuck. The clamping stroke is for example more than 50 mm. This results in a variable clamping diameter with flexible installation options for the device 41 for the extendable supports Sl, S2, S3.

FIG. 3 again shows the device 41, which allows a repeatable tool support in a cavity. For this purpose, only tools with a centering cone in the centering Z must be docked.

FIG. 4 shows an installation of the device 41 in the interior of a fitting 2. The device 41 in this case lies on a mounting tool which has a cone at its end which has docked in the centering sleeve of the device 41.

By means of a not visible in Figure 4 shaft, the hub of the device 41 is driven, whereby the executable supports Sl, S2, S3 by means of the transmission shown in Figure 2 be extended, whereby the device 41 is spread in the valve 2. The assembly tool can continue to engage by means of actuators in the first drive shaft and the second drive shaft ^¬ on and so drive the alignment element A, whereby the centering sleeve is adjustable to a rotationally symmetrical center axis of the valve 2.

Figure 5 shows the device 41 according to the embodiments of Figure 1 to Figure 3 in the installed state in the rear part of a valve 2, for example immedi ^¬ immedi ately behind a valve seat surface.

Figure 6 shows the device 41 according to the embodiments of Figure 1 to Figure 3, which is braced in the vicinity of a flange of a valve 2. As a result, the device 41 provides a repeatable tool support for machining a flange surface or a lid contact surface. Such an embodiment is the example of a

 Abrasive machining shown in Figure 7. The device 41 is here as shown in Figure 6 in the vicinity of the flange in the armature 2 splayed. It serves to stabilize a grinding tool with which the flange surface or a cover contact surface can be machined.

Although the invention has been illustrated and described in detail by the embodiments, it is not limited by the disclosed examples. Other variations can be deduced therefrom by the person skilled in the art without the

To leave the scope of the invention. The described embodiments, variants, embodiments and Wei ^¬ terbildungen can continue to be freely combined with each other.

Claims

claims Means (41) for bracer in a cavity, in particular a fitting (2), in particular an actuating ^¬ valve in a power plant, at least three extendable supports (Sl, S2, S3) which are mounted radially with respect to a first axis of symmetry in a Ba ^¬ sisbauteil (B), with a centering (Z) for a construction centering on ^¬ part, wherein a symmetry axis of the centering sleeve (Z) pa rallel ^¬ to the first axis of symmetry,  wherein the centering sleeve (Z) is arranged on an alignment element (A) with which the centering sleeve (Z) can be fixed in an adjustment range in the radial direction to the first axis of symmetry. Device according to claim 1,  with a rotationally symmetrical about the first axis of symmetry arranged hub (N), in particular a splined hub, and with a transmission which allows an extension of the supports (Sl, S2, S3) by means of rotation of the hub (N). Device according to one of the preceding claims, in which the alignment element (A) is a self-locking X- Y sliding carriage is. Device according to one of the preceding claims, wherein the alignment element (A) has a first drive shaft ^¬ (Wl) for a first actuating gear for moving the centering sleeve (Z) in an x-direction within the tell ^¬ tellbereiches, and wherein the alignment element (A), a second drive ^¬ wave (W2) for a second actuating mechanism for moving the centering sleeve (Z) in a direction orthogonal to the x-direction y-direction within the adjustment range. 5. Apparatus according to claim 4, wherein the first drive shaft (Wl) and the second on ^¬ drive shaft (W2) each comprise a mechanical connection for torque transmission. 6. Apparatus according to claim 5,  with a first actuator, which is connected to the first drive shaft (Wl), and  with a second actuator, which is connected to the second drive shaft (W2). 7. Apparatus according to claim 6,  with a battery for powering the first and second actuator. 8. Device according to one of the preceding claims,  in which the centering sleeve (Z) is shaped as a cone shell. 9. Device according to one of the preceding claims, wherein the centering (Z) is mounted with a spherical ^¬ from the same element. 10. A method for mounting the device (41) according to one of the preceding claims in a valve (2), in particular a control valve in a power plant,  in which the device (41) is introduced into the fitting (2),  in which the supports (Sl, S2, S3) are extended, whereby the device (41) in the fitting (2) is spread, and  in which the centering sleeve (Z) is fixed in the adjustment area such that the axis of symmetry of the centering sleeve (Z) coincides with a central axis (8) of the fitting (2). 11. The method according to claim 10, in which for the extension of the supports (Sl, S2, S3) arranged a rotationally symmetrical about the first axis of symmetry Hub (N), in particular a splined hub is rotated, where ^¬ by a transmission, the supports (Sl, S2, S3) extends. 12. The method according to claim 10 or 11, - In the after spreading of the device (41) a Measuring tool, which is mounted in the centering sleeve (Z), creates a three-dimensional image of a rotationssymmetri ^¬ rule processing area (30) of the valve (2), in which a computing unit (RE) from the three-dimensional image, the central axis (8) of the valve (2 ) calculated wel ^¬ surface machining of rotationally symmetric, the symmetry axis ^¬ processing region (30), and  in which a controller controls a first actuator and a second actuator such that a first actuator and a second actuator the centering sleeve (Z) move so that the axis of symmetry of Zentrierhül ^¬ se (Z) with the central axis (8) of the valve (2) coincides. 13. The method according to any one of claims 10 to 12, wherein the armature (2) during the implementation of the method at the location of its operation at least partially ^¬ builds remains. 14. Use of the device according to one of claims 1 to 9 for the centered mounting of tools in a fitting (2), in particular a control valve in a power ^¬ plant.