Center calibration device for steam turbine installation

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By designing the central calibration device, using components such as retractable tripods and laser rangefinders, the problem of accurate search in steel wire in turbine installation and complex scenarios is solved, horizontal straightening and recycling of steel wires is achieved, and installation accuracy and reuse rate are improved.

CN223154224UActive Publication Date: 2025-07-25POWERCHINA SEPCO1 ELECTRIC POWER CONSTR CO LTD

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Patent Information

Application Number: CN202422239247.0
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-09-12
Publication Date: 2025-07-25
Estimated Expiration: 2034-09-12

AI Technical Summary

Technical Problem

In the prior art, during the installation of steam turbines, the steel wire is prone to tilt, which leads to installation deviations, and it is difficult to accurately find in complex scenarios, and the steel wire reuse rate is low.

Method used

A central calibration device consisting of two frames with the same structure, a retractable tripod, wire adjustment sleeve, pole and wire hook and loop was designed. Combined with a level and a laser rangefinder, it ensures that the wire is level and recyclable, suitable for uneven grounds.

Benefits of technology

The horizontal straightening and recycling of steel wires is achieved, the accuracy of turbine installation and the scope of application of the equipment are improved, and the reuse rate of steel wires is improved.

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Abstract

The utility model relates to a center calibration device for steam turbine installation, which comprises two frame bodies with the same structure, a steel wire adjusting sleeve, a vertical rod, a steel wire shackle, two groups of gradienters and two groups of laser range finders, and can accurately straighten a steel wire, avoid a sagging arc state of the steel wire and finish the centering operation of a steam turbine. According to the telescopic characteristic of the telescopic foot stool in the frame body and the tip structure of the bottom of the telescopic foot stool, the calibration device can be suitable for complex scenes such as uneven ground, and the application range of the calibration device is widened; and finally, by means of a winder arranged in the steel wire adjusting sleeve, after the centering process is completed, the steel wire can be recycled into the steel wire adjusting sleeve, and therefore the repeated utilization rate of the steel wire is increased.

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Description

Technical Field

[0001] The utility model relates to the technical field of steam turbine installation, and particularly relates to a central alignment device for steam turbine installation. Background Art

[0002] The statements herein only provide the background art related to the utility model, and do not necessarily constitute the prior art.

[0003] As an indispensable device in the steam turbine room of a thermal power plant, the steam turbine provides the power foundation for power generation; and the precise installation of the steam turbine also provides safety guarantee for the normal operation of the thermal power plant. Before the installation of the steam turbine, the laser centering method or the wire-pulling method is usually adopted to carry out the centering process of the steam turbine to ensure the precise installation of the steam turbine.

[0004] In the prior art during the centering process of the steam turbine, because the two upright rods used cannot be completely guaranteed to be in the same plane, the tightened wire will have a certain inclination angle, resulting in deviation in the installation of the steam turbine; moreover, in complex scenarios such as uneven ground, the centering process cannot be carried out. At the same time, after the centering process, the used wire will be discarded, resulting in low reuse rate and causing certain waste. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide a central alignment device for steam turbine installation, which can be applicable to relatively complex scenarios, and ensure that the pulled wire is in a horizontal state. At the same time, on the premise of ensuring that the wire has no sag, the wire can be recycled to improve the reuse rate of the device.

[0006] The purpose of the utility model is to provide a central alignment device for steam turbine installation, including two identical frameworks; the framework includes a bearing platform and at least three telescopic scaffolds, and the telescopic scaffolds are fixedly connected to the lower surface of the bearing platform;

[0007] The alignment device further includes a wire adjusting sleeve, an upright rod and a wire hook ring. The wire adjusting sleeve is vertically arranged at the center of the upper surface of the bearing platform in one framework, the upright rod is vertically arranged at the center of the upper surface of the bearing platform in the other framework, and the wire hook ring is nested on the upright rod;

[0008] The wire adjusting sleeve includes a sleeve, a wire and a wire winder. The wire winder is arranged inside the sleeve, the wire is wound on the wire winder, and one end of the wire is fixedly connected to the wire winder, and the other end of the wire is used for being fixedly connected to the wire hook ring to realize the centering process of the steam turbine.

[0009] As a further technical solution, fine holes are formed in the side surface of the sleeve.

[0010] As a further technical solution, the calibration device further includes two spirit levels, and the two spirit levels are respectively arranged on the upper surfaces of the middle platforms of the two frames.

[0011] As a further technical solution, the calibration device further includes two laser rangefinders, and the two laser rangefinders are respectively arranged at the centers of the lower surfaces of the middle platforms of the two frames.

[0012] As a further technical solution, the bottom end of the telescopic tripod is a tip structure.

[0013] As a further technical solution, the tip structure is specifically a cone.

[0014] As a further technical solution, extrusion screws are arranged on the telescopic tripod and the wire hook ring.

[0015] As a further technical solution, the telescopic tripod is made of stainless steel.

[0016] As a further technical solution, the length of the vertical rod is greater than the length of the wire adjusting sleeve.

[0017] As a further technical solution, the middle platform and the vertical rod are of a cylindrical structure.

[0018] Advantages of the above one or more technical solutions:

[0019] (1) In this embodiment, based on two frames with the same structure, and relying on the wire adjusting sleeves and wire hook rings arranged on different frames, the tension of the wire is realized, avoiding the sagging state of the wire, and completing the alignment process of the steam turbine; and based on the wire winder in the wire adjusting sleeve, after the alignment process is completed, the wire can be retracted into the wire adjusting sleeve, thereby improving the reuse rate of the wire.

[0020] (2) In this embodiment, based on the three telescopic tripods, spirit levels and laser rangefinders arranged, it is ensured that the middle platforms in the two frames are at the same horizontal height, and it is ensured that the middle platforms are in a horizontal state, thereby improving the accuracy of the alignment process of the steam turbine and ensuring the accurate installation of the steam turbine. And based on the telescopic characteristics of the telescopic tripod and the tip structure at its bottom, the calibration device can be applied to relatively complex scenarios such as uneven ground, improving the applicable range of the calibration device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The schematic diagrams in the specification, which form a part of this application, are used to provide a further understanding of this application. For the convenience of understanding, the proportions between various parts of the structure are adjusted. The schematic embodiments of this application and their descriptions are used to explain this application and do not constitute a limitation to this application.

[0022] Figure 1This is a schematic structural diagram of a central alignment device for steam turbine installation of the present utility model.

[0023] Figure 2 This is a top view of a partial structure in a central alignment device for steam turbine installation of the present utility model.

[0024] Among them, 1. Steel wire adjusting sleeve, 2. Level, 3. Bearing platform, 4. Laser rangefinder, 5. Telescopic tripod, 6. Steel wire hook ring, 7. Extrusion screw, 8. Vertical rod. Specific implementation manner

[0025] The following combines the attached Figure 1-2 , and clearly and completely describes the technical solutions in the embodiments of the present utility model.

[0026] Embodiment 1

[0027] Referring to Figure 1 , a central alignment device for steam turbine installation includes two identical frames; among them, the frame includes a bearing platform 3 and three telescopic tripods 5.

[0028] Specifically, the bearing platform 3 is a cylindrical structure made of stainless steel, so as to ensure that the bearing platform 3 has sufficient supporting force and is convenient for the installation of the telescopic tripod 5. And the three telescopic tripods 5 are uniformly arranged at the edge of the lower surface of the bearing platform 3 by welding, that is, the included angle between two adjacent telescopic tripods 5 arranged on the lower surface of the bearing platform 3 is 120°. In this embodiment, the number of telescopic tripods 5 is 3 and is made of stainless steel. At the same time, the layout of the telescopic tripods 5 on the bearing platform 3 ensures the stability of the frame; the number of telescopic tripods 5 and the structure of the bearing platform 3 can be adjusted adaptively, and there is no requirement here; finally, the telescopic tripods 5 used in this embodiment can extend outwards, that is, the included angle between the telescopic tripods 5 and the ground can be changed.

[0029] The telescopic tripod 5 in this embodiment has a telescopic function, and an extrusion screw 7 is provided to control the telescopic length of the telescopic tripod 5; by adjusting the lengths of the three telescopic tripods 5, it can ensure that the bearing platform 3 is in a horizontal state, providing a guarantee for the centering of the steam turbine.

[0030] And the bottom end of the telescopic tripod 5 is set as a tip structure, which can specifically be set as a cone, including structures such as a cone and a pyramid; through this setting, the tip structure can still make the bearing platform 3 in a horizontal state through the telescopic tripod 5 in complex scenarios such as uneven ground and potholed roads, improving the stability and application range of the alignment device, and avoiding the problem of the alignment device shaking and being unstable due to the flat structure at the bottom end of the telescopic tripod 5.

[0031] Referring to Figure 1-2, the calibration device further includes a wire adjustment sleeve 1.

[0032] Among them, the wire adjustment sleeve 1 includes a sleeve, a wire, and a wire reel.

[0033] In this embodiment, the sleeve is a cylindrical structure without a bottom surface, hollow inside, and made of aluminum alloy; and the wire reel is a device that can automatically wind the wire, with the same structure and principle as the wire reel in a tape measure. Specifically, the upper and lower circular baffles of the wire reel have the same circular area as the upper surface of the sleeve, so that the wire reel is nested inside the sleeve in a horizontal winding manner, while ensuring that there is a gap between the wire reel shaft in the wire reel and the inner side surface of the sleeve for winding the wire. Figure 1 The wire adjustment sleeve 1 shown in [Figure] is the internal wire and wire reel structure, and a sleeve is provided outside the wire and wire reel structure. At the same time, the lower bottom edge on the side of the sleeve is vertically fixed at the center of the upper surface of the bearing platform 3 in one of the frames by welding or bonding.

[0034] Refer to Figure 1 , the wire is wound on the wire reel, and one end of the wire is fixedly connected to the wire reel by welding or bonding; and a fine hole is provided on the side surface of the sleeve for the wire to pass through the fine hole to reach the outside of the wire adjustment sleeve 1. In order to conveniently access the wire, the end of the wire extending out of the wire adjustment sleeve 1 is set into a circular ring structure, and at the junction of the circular ring structure and the straightened wire, a button structure is set, and it is ensured that the size of the button structure is larger than the fine hole on the side surface of the sleeve, so as to ensure that the circular ring structure is always located outside the wire adjustment sleeve 1, thereby facilitating the access to the wire, and at the same time using the circular ring structure to conveniently fix the wire.

[0035] Through the structure of the wire adjustment sleeve 1, it is convenient to access the wire for the turbine alignment operation during use; after the operation is completed, using the automatic wire winding function of the wire reel, the wire can be retracted into the wire adjustment sleeve 1, which is convenient for the next use, thereby improving the reuse rate of the wire and avoiding the waste of the wire.

[0036] Refer to Figure 1-2 , the calibration device further includes a vertical rod 8 and a wire hook 6.

[0037] Among them, the vertical rod 8 is a cylindrical structure made of aluminum alloy. Since it is used to straighten the wire and does not require too high hardness, using aluminum alloy material is convenient for cost saving; and based on the cylindrical structure of the vertical rod 8, it is convenient for the wire hook 6 to move and be fixed on the vertical rod 8. Specifically, the vertical rod 8 is vertically arranged at the center of the upper surface of the bearing platform 3 in another frame.

[0038] In this embodiment, the wire hook ring 6 is a ring-shaped structure made of aluminum alloy and is nested on the vertical rod 8; a hook is provided on the outer side surface of the wire hook ring 6 for hooking the wire to straighten the wire; at the same time, a pressing screw 7 is provided on the wire hook ring 6 for fastening and nesting the wire hook ring 6 on the vertical rod 8.

[0039] In this embodiment, the length of the vertical rod 8 is greater than the length of the wire adjusting sleeve 1, so as to provide sufficient area for the movement of the wire hook ring 6, thereby ensuring that the wire can be straightened and fixed. Here, the length of the wire adjusting sleeve 1 refers to the height of the sleeve in the wire adjusting sleeve 1, and is also the distance between the top of the sleeve and the upper surface of the bearing platform 3.

[0040] Refer to Figure 1-2 , the calibration device further includes two spirit levels 2 and two laser rangefinders 4; wherein, the two spirit levels 2 are respectively arranged on the upper surface of the bearing platform 3 in the two frames, and the two laser rangefinders 4 are respectively arranged at the centers of the lower surfaces of the bearing platforms 3 in the two frames.

[0041] Specifically, by arranging the spirit level 2 on the bearing platform 3, the bearing platform 3 is ensured to be in a horizontal state, providing guarantee for the centering operation of the steam turbine; and by arranging the laser rangefinder 4 at the center of the lower surface of the bearing platform 3 and ensuring that the angle between the laser emitted by the laser rangefinder 4 and the plane where the bearing platform 3 is located is 90°, the laser rangefinder 4 can be used to measure the distance between the lower surface of the bearing platform 3 and the ground or the supporting surface where the calibration device is placed, so as to ensure that the heights of the bearing platforms 3 in the two frames are the same, further providing guarantee for the centering operation of the steam turbine and improving the accuracy of steam turbine installation.

[0042] Usage steps of the calibration device:

[0043] Step 1: Place the two frames at the corresponding positions, and at the same time make the fine holes on the sleeve in the wire adjusting sleeve 1 and the hooks on the wire hook ring 6 in a relative state.

[0044] Step 2: By adjusting the telescopic state of the telescopic tripod 5 and observing the parameters of the laser rangefinder 4 and the spirit level 2, ensure that the bearing platforms 3 on the two frames are in a horizontal state and at the same height. At the same time, combine the micrometer to ensure that the fine holes on the sleeve in the wire adjusting sleeve 1 are at a suitable height.

[0045] Step 3: After determining the position of the fine hole, use the micrometer to adjust the height of the hook on the wire hook ring 6 to make the height of the hook consistent with that of the fine hole.

[0046] Step 4: Pull the wire in the wire adjusting sleeve 1 and fix it on the hook on the wire hook ring 6.

[0047] Step 5: Check the parameters of the laser rangefinder 4 and the level 2, and use the micrometer to measure the heights of the fine holes and the hooks located on the two frames respectively for the second time; after the parameters are correct, the position of the steel wire at this time is the center line position of the steam turbine, and record it.

[0048] Step 6: Remove the steel wire from the hook, and recycle the steel wire into the steel wire adjusting sleeve 1 to complete the centering operation of the entire steam turbine.

[0049] The steps of using the above calibration device are for a relatively flat ground or support surface. When dealing with a relatively complex uneven or potholed road surface, the level 2 and the telescopic tripod 5 can also be combined to ensure that the bearing platform 3 is in a horizontal state; and devices such as a laser level are combined to ensure that the bearing platforms 3 in the two frames are at the same height.

[0050] Although the specific implementation manners of the present invention are described above in conjunction with the accompanying drawings, it is not a limitation to the protection scope of the present invention. Those skilled in the art should understand that based on the technical solutions of the present invention, various modifications or deformations that can be made without creative labor by those skilled in the art are still within the protection scope of the present invention.

Claims

1. A central calibration device for steam turbine installation, characterized in that, It includes two identically structured frameworks; each framework includes a bearing platform and at least three telescopic scaffolds, and the telescopic scaffolds are fixedly connected to the lower surface of the bearing platform; The alignment device further includes a wire adjusting sleeve, a vertical rod, and a wire hook ring. The wire adjusting sleeve is vertically arranged at the center of the upper surface of the bearing platform in one framework, the vertical rod is vertically arranged at the center of the upper surface of the bearing platform in the other framework, and the wire hook ring is nested on the vertical rod; The wire adjusting sleeve includes a sleeve, a wire, and a wire winder. The wire winder is arranged inside the sleeve, the wire is wound around the wire winder, one end of the wire is fixedly connected to the wire winder, and the other end of the wire is used to be fixedly connected to the wire hook ring to realize the alignment process of the steam turbine.

2. The central alignment device for steam turbine installation according to claim 1, characterized in that, Fine holes are formed on the side surface of the sleeve.

3. A central calibration device for steam turbine installation according to claim 1, characterized in that, The alignment device further includes two spirit levels, and the two spirit levels are respectively arranged on the upper surfaces of the bearing platforms in the two frameworks.

4. A central calibration device for steam turbine installation according to claim 1, characterized in that, The alignment device further includes two laser rangefinders, and the two laser rangefinders are respectively arranged at the centers of the lower surfaces of the bearing platforms in the two frameworks.

5. A central calibration device for steam turbine installation according to claim 1, characterized in that, The bottom end of the telescopic scaffold is a tip structure.

6. The central calibration device for steam turbine installation according to claim 5, characterized in that, The tip structure is specifically a cone.

7. A central calibration device for steam turbine installation according to claim 1, characterized in that, Extrusion screws are arranged on the telescopic scaffold and the wire hook ring.

8. A central calibration device for steam turbine installation according to claim 1, characterized in that, The telescopic scaffold is made of stainless steel.

9. The central calibration device for steam turbine installation according to claim 1, characterized in that, The length of the vertical rod is greater than the length of the wire adjusting sleeve.

10. A central calibration device for steam turbine installation according to claim 1, characterized in that, The bearing platform and the vertical rod are of a cylindrical structure.