Water turbine stator roundness measuring frame refitted supporting platform

Abstract

The utility model provides a water turbine stator roundness measuring frame refitted support platform, which comprises a central platform and a plurality of support arms, the central platform is connected with the support arms through a lengthening section, the lengthening section comprises a top plate and a bottom plate, the top plate and the bottom plate are connected through a web plate, side plates are arranged at two ends of the top plate and the bottom plate, and the web plate and the side plates are vertically arranged. A plurality of bolt holes are formed in the side plates, and the connecting plates at the connecting end of the center platform and the end lug plates at the ends of the supporting arms are connected with the side plates through bolts. According to the supporting platform, an existing cross-shaped steel platform is modified, and the applicability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water turbine stator assembly, in particular to a water turbine stator round frame modification support platform. Background Art

[0002] The stator is an important part of the turbine unit and also the main component of the magnetic circuit of the turbine unit. The roundness of the inner circle of the stator and the coaxiality with the base ring plate are necessary conditions to ensure the normal operation of the turbine unit. At present, in the assembly process of the turbine stator of a hydropower station, due to the large inner diameter of the stator, the conventional circle measurement method used in the existing technology is: build a circle measurement frame support platform, and install the circle measurement frame in the central mounting hole of the support platform.

[0003] Generally, the support platform of the measuring circular frame is a "cross" steel platform. When measuring turbine units of different sizes, steel frames of different sizes need to be prepared. For example, the radius of the cross steel platform of the Gezhouba 170MW unit is 0.85m longer than that of the 150MW unit. Therefore, generally one model of cross steel platform is only suitable for the stator assembly measurement of turbine units of one specification, and its applicability is poor. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a turbine stator circular frame modification support platform, which is used to modify the existing cross steel platform and improve the applicability.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a turbine stator circular frame modified support platform, including a central platform and a plurality of support arms, the central platform is connected to the support arms through an extension section, the extension section includes a top plate and a bottom plate, the top plate and the bottom plate are connected through a web plate, side plates are provided at both ends of the top plate and the bottom plate, the web plate and the side plates are vertically arranged, a plurality of bolt holes are provided on the side plates, and the connecting plate at the connecting end of the central platform and the end ear plate at the end of the support arm are connected to the side plates through bolts.

[0006] In a preferred solution, the bolt holes are distributed around the side plate.

[0007] In the preferred solution, the upper side of the side panel, the upper side of the connecting plate and the upper side of the end ear plate are flush with the top plate, and avoidance holes are provided on the top plate, the upper side of the connecting plate of the center platform and the upper side of the arm end, and the avoidance holes are arranged corresponding to the bolt holes on the upper side of the side panel.

[0008] In a preferred solution, a lifting lug is provided on the upper side of the support arm.

[0009] In a preferred solution, connecting ear plates are provided on both sides of the supporting arms, and the connecting ear plates of two adjacent groups of supporting arms are connected by a connecting rod.

[0010] The utility model provides a turbine stator circular measuring frame modified support platform, which has the following beneficial effects:

[0011] 1. By setting the extension section, the length of the extension section can be changed according to the different sizes of the runner chamber, without the need to reprocess the entire support platform, thereby improving applicability.

[0012] 2. By setting the connecting ears and connecting rods, the deflection of the entire platform can be improved, so that the platform is stable and firm without shaking when the circular measuring frame rotates.

[0013] 3. Before and after the 5t circular measuring frame is installed in the center of the platform, the center of the platform sinks no more than 2.5mm. During the measurement process of rotating the circular measuring frame, the platform is stable and firm without shaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0015] Figure 1 It is a top view of the utility model;

[0016] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0017] Figure 3 It is a side view of the utility model;

[0018] Figure 4 It is the front view of the extension section;

[0019] Figure 5 It is a top view of the extended section;

[0020] Figure 6 It is the left view of the extension section;

[0021] Figure 7 is a schematic diagram of the structure of the top plate;

[0022] In the figure: central platform 1, connecting end 101, connecting plate 102, extension section 2, top plate 201, bottom plate 202, web plate 203, side plate 204, bolt hole 205, support arm 3, end ear plate 301, lifting ear 4, connecting ear plate 5, connecting rod 6, avoidance hole 7. DETAILED DESCRIPTION

[0023] like Figures 1 to 7 As shown, a turbine stator circular frame modified support platform includes a central platform 1 and a plurality of support arms 3. In this embodiment, four groups of support arms 3 are arranged, and the central platform 1 and the support arms 3 form a cross-shaped steel structure platform.

[0024] The central platform 1 is connected to the support arm 3 through the extension section 2. Figures 4 and 5As shown, the extension section 2 includes a top plate 201 and a bottom plate 202, the top plate 201 and the bottom plate 202 are arranged in parallel, the top plate 201 and the bottom plate 202 are connected by a web plate 203, two groups of web plates 203 are arranged, the web plates 203 are arranged perpendicular to the top plate 201 and the bottom plate 202, side plates 204 are arranged at both ends of the top plate 201 and the bottom plate 202, the web plate 203 and the side plates 204 are arranged perpendicularly, a plurality of bolt holes 205 are arranged on the side plates 204, and the connecting plate 102 of the connecting end 101 of the central platform 1 and the end ear plate 301 at the end of the arm 3 are connected to the side plates 204 by bolts.

[0025] In this embodiment, the bolt holes 205 are distributed along the periphery of the side plate 204 .

[0026] The upper side of the side plate 204, the upper side of the connecting plate 102 and the upper side of the end ear plate 301 are flush with the top plate 201, so as to prevent the upper side of the side plate 204, the upper side of the connecting plate 102 and the upper side of the end ear plate 301 from protruding from the top plate 201, and to prevent the upper side of the support platform from being uneven and causing interference in the installation of the stator maintenance platform. The top plate 201, the upper side of the connecting plate 102 of the central platform 1 and the upper side of the end of the support arm 3 are provided with avoidance holes 7, and the avoidance holes 7 are arranged corresponding to the bolt holes 205 on the upper side of the side plate 204, such as Figure 2 As shown, by providing the avoidance hole 7, the installation of the bolts on the upper side of the side plate 204 is facilitated.

[0027] Preferably, a lifting lug 4 is provided on the upper side of the support arm 3, and the lifting lug 4 is provided to facilitate the lifting of the entire support platform.

[0028] Preferably, connecting lug plates 5 are provided on both sides of the support arms 3, and the connecting lug plates 5 of two adjacent groups of support arms 3 are connected by connecting rods 6, and the connecting rods 6 are connected to the connecting lug plates 5 by bolts. By providing the connecting rods 6, the deflection of the entire support platform is improved.

[0029] In specific use, for the runner room of turbine units of different sizes, the entire support platform is assembled by selecting extension sections 2 of different specifications. After the assembly is completed, the support platform is hoisted in the runner room, and the end of the support arm 3 is installed on the concrete foundation of the runner room. The central platform 1 is suspended, and the central platform 1 is coaxially arranged with the runner. The stress analysis simulation of the platform shows that the maximum deformation at the center is 0.024mm, which is much smaller than 2.5mm; the maximum local mises stress is 12.24MPa, which is much smaller than 235MPa. During the measurement process of the rotating circular frame, the platform is stable and reliable without shaking, and the platform can accommodate no less than 4 people working at the same time.

Claims

1. A support platform for modifying a stator circular frame of a turbine, comprising a central platform (1) and a plurality of supporting arms (3), characterized in that: The central platform (1) is connected to the support arm (3) via an extension section (2); the extension section (2) comprises a top plate (201) and a bottom plate (202); the top plate (201) and the bottom plate (202) are connected via a web plate (203); side plates (204) are provided at both ends of the top plate (201) and the bottom plate (202); the web plate (203) and the side plates (204) are vertically arranged; a plurality of bolt holes (205) are provided on the side plates (204); and the connecting plate (102) of the connecting end (101) of the central platform (1) and the end ear plate (301) at the end of the support arm (3) are connected to the side plates (204) via bolts.

2. A turbine stator circular frame modified support platform according to claim 1, characterized in that: The bolt holes (205) are distributed along the periphery of the side plate (204).

3. A turbine stator circular frame modified support platform according to claim 2, characterized in that: The upper sides of the side plates (204), the upper sides of the connecting plates (102) and the upper sides of the end ear plates (301) are flush with the top plate (201); the top plate (201), the upper sides of the connecting plates (102) of the central platform (1) and the upper sides of the ends of the supporting arms (3) are provided with avoidance holes (7); the avoidance holes (7) are arranged corresponding to the bolt holes (205) on the upper sides of the side plates (204).

4. The turbine stator circular frame modified support platform according to claim 1, characterized in that: A lifting lug (4) is provided on the upper side of the support arm (3).

5. The turbine stator circular frame modified support platform according to claim 1, characterized in that: Connecting ear plates (5) are provided on both sides of the supporting arms (3), and the connecting ear plates (5) of two adjacent groups of supporting arms (3) are connected via a connecting rod (6).

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