CN210500135U

CN210500135U - Platform for overhauling seat ring of water turbine

Info

Publication number: CN210500135U
Application number: CN201921055064.6U
Authority: CN
Inventors: 刘羚; 徐进; 高齐瑞; 成传诗; 周政
Original assignee: China Yangtze Power Co Ltd
Current assignee: China Yangtze Power Co Ltd
Priority date: 2019-07-08
Filing date: 2019-07-08
Publication date: 2020-05-12
Anticipated expiration: 2029-07-08

Abstract

The utility model provides a hydraulic turbine seat ring overhauls platform, includes that a plurality of platform unit connect to form, the platform unit include first crown plate and second crown plate, be connected with inner race plate and outer race plate between first crown plate and the second crown plate, be equipped with a plurality of corresponding through-holes on first crown plate and the second crown plate, the both ends of first crown plate and second crown plate all are equipped with the connecting plate, are equipped with fastening bolt on the connecting plate, a plurality of platform units are fixed through the fastening bolt connection of the connecting plate of mutual contact. By adopting the structure, the installation is convenient, and the safety of the operation of the platform of the operating personnel is improved; the shaft shoulder of the movable guide vane is used for supporting, and the movable guide vane is limited by the shaft neck, so that the integral reliability of the platform is further improved; whole device simple structure is reasonable, the preparation hoist and mount of being convenient for, and the practicality is extremely strong.

Description

Platform for overhauling seat ring of water turbine

Technical Field

The utility model relates to a field, especially a platform is overhauld to hydraulic turbine seat ring.

Background

In the overhaul process of a hydropower station, large parts such as a top cover and the like need to be lifted out so as to maintain the top cover and a seat ring, but after the top cover is lifted out, field constructors can only operate at the shaft shoulder at the upper end of a movable guide vane to clean the flange surface of the seat ring, replace the seat ring in a sealing mode and perform other maintenance operations, the opening degree of the movable guide vane is 65%, the jumping span of the operators on the shaft shoulder is more than 0.8m, the inner edge of the movable guide vane is free of a safety baffle, the height of the movable guide vane is about 10m from the maintenance platform of a runner chamber, the movable guide vane is two-level high-altitude operation, once the operators are unstable in crossing, the high altitude can be caused, and great hidden danger is brought to the personal.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a hydraulic turbine seat ring maintenance platform, which realizes convenient installation and improves the safety of platform operation of operators; the shaft shoulder of the movable guide vane is used for supporting, and the movable guide vane is limited by the shaft neck, so that the integral reliability of the platform is further improved; whole device simple structure is reasonable, the preparation hoist and mount of being convenient for, and the practicality is extremely strong.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: the utility model provides a hydraulic turbine seat ring overhauls platform, includes that a plurality of platform unit connect to form, the platform unit include first crown plate and second crown plate, be connected with inner race plate and outer race plate between first crown plate and the second crown plate, be equipped with a plurality of corresponding through-holes on first crown plate and the second crown plate, the both ends of first crown plate and second crown plate all are equipped with the connecting plate, are equipped with fastening bolt on the connecting plate, a plurality of platform units are fixed through the fastening bolt connection of the connecting plate of mutual contact.

In a preferable scheme, a plurality of rib plates are arranged between the first ring plate and the second ring plate.

In a preferred scheme, the rib plate is positioned between two adjacent through holes on the first ring plate and the second ring plate.

In a preferred scheme, a plurality of slot plates are arranged on the inner ring plate, and a fence is arranged on each slot plate.

In a preferred scheme, a locking plate is arranged on the fence.

In a preferred scheme, the first annular plate is provided with a hoisting hole.

The utility model provides a platform is overhauld to hydraulic turbine seat ring through adopting above-mentioned structure, has following beneficial effect:

(1) the platform is simple in structure and convenient to install, can be smoothly hoisted into a foundation pit after the platform is circularly assembled, provides a safe and reliable operation platform for operators, and ensures the personal safety of the operators;

(2) the platform directly adopts the movable guide vane shaft neck for limiting, can be stably supported at the upper shaft shoulder of the movable guide vane, and further enhances the safety and reliability of the platform;

(3) this platform inner circle safety protection rail easy dismounting, and all connect the fastening with two lockplates between per two rails, prevent to appear not hard up and the condition of taking off the groove, avoided the high altitude risk of falling.

Drawings

The invention will be further explained with reference to the following figures and examples:

fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic structural diagram of the platform unit of the present invention.

Fig. 3 is a schematic structural diagram of the platform unit of the present invention.

In the figure: the platform unit comprises a platform unit 1, a first ring plate 2, a second ring plate 3, an inner ring plate 4, an outer ring plate 5, rib plates 6, a connecting plate 7, fastening bolts 8, through holes 9, a fence 10, a slot plate 11, a locking plate 12 and a hoisting hole 13.

Detailed Description

The first embodiment is as follows:

as in fig. 1-3, a hydraulic turbine seat ring overhauls platform, connect to constitute including a plurality of platform units 1, platform unit 1 include first crown plate 2 and second crown plate 3, be connected with inner circle board 4 and outer ring board 5 between first crown plate 2 and the second crown plate 3, be equipped with a plurality of corresponding through-holes 9 on first crown plate 2 and the second crown plate 3, the both ends of first crown plate 2 and second crown plate 3 all are equipped with connecting plate 7, be equipped with fastening bolt 8 on connecting plate 7, a plurality of platform units 1 are connected fixedly through the fastening bolt 8 of the connecting plate 7 of mutual contact.

In a preferable scheme, a plurality of rib plates 6 are arranged between the first ring plate 2 and the second ring plate 3. The stability of overall structure has been promoted, and the security is strong.

In a preferred scheme, the rib plate 6 is positioned between two adjacent through holes 9 on the first annular plate 2 and the second annular plate 3. Not only easy to assemble and use, but also improved overall structure's intensity, the practicality is strong.

In a preferable scheme, a plurality of slot plates 11 are arranged on the inner ring plate 4, and a fence 10 is arranged on each slot plate 11. The safety of the device is improved.

In a preferred scheme, a locking plate 12 is arranged on the fence 10. The connection strength between a plurality of fences 10 is improved, and the safety is improved.

In a preferable scheme, the first annular plate 2 is provided with a hoisting hole 13. Is convenient to hoist and has strong practicability.

Example two:

as shown in fig. 1-3, the platform is designed mainly according to the sizes of the seat ring and the movable guide vane, the radius of the inner ring of the flange surface of the seat ring contacting the top cover is 6370mm, and the radius of the outer ring of the platform is designed as R outer =6350mm, so that a sufficient gap is ensured between the platform and the seat ring when the platform is hoisted into the foundation pit; when the opening of the movable guide vane is 65%, an included angle between a vane center line of the movable guide vane and a radial connecting line of a machine set center and a journal center is about 33 degrees, the theoretical radius of the inner ring of the platform is R inner =5900 plus 638 cos33=5365mm according to the index circle radius of the guide vane journal center 5900mm and the distance between the edge of the vane small end and the journal center 638mm, and the radius of the inner ring of the platform is designed to be R inner 5150mm by considering that the journal radius is 200mm and the width of a walking channel of an operator on the platform; meanwhile, the diameter of the lowest end of the upper journal of the movable guide vane is 415mm, the diameter of the aperture of the platform penetrating into the movable guide vane is designed to be 450mm, and sufficient clearance is ensured between the platform and the upper journal of the guide vane when the platform is hung into a foundation pit;

the platform is formed by combining four platform units 1, each platform unit 1 mainly comprises a first annular plate 2, a second annular plate 3, an inner annular plate 4, an outer annular plate 5, seven radial rib plates 6 and connecting plates 7 on two sides, and eight through holes with the diameter of 450mm are uniformly distributed at the position with the center reference circle radius of 5900 mm. The distance above a volute liner plate is 920mm from a seat ring flange surface, the distance between a shaft shoulder on a guide vane and the seat ring flange surface is 930mm, and the designed platform height is 300mm, so that the outer ring of the platform is opposite to the seat ring, a high-altitude drop point is avoided, only inner ring safety protection fences need to be designed, 8 fences are uniformly distributed and installed in each structure, the fences are installed in slot plates welded at the edges of the inner ring of the platform, and two locking plates are used for connecting and fastening between every two fences, so that the loosening and the groove dropping are avoided;

when the platform is used on site, balanced three lifting points are formed by the upper bolt holes of the connecting plates 7 on the two sides and the lifting holes in the middle, the platform units 1 of each section are lifted and combined into a whole, and 4 platform units 1 are combined and fixedly connected by using M20 bolts.

The utility model has the advantages that: the installation is convenient, and the safety of the operation of the platform of the operating personnel is improved; the shaft shoulder of the movable guide vane is used for supporting, and the movable guide vane is limited by the shaft neck, so that the integral reliability of the platform is further improved; whole device simple structure is reasonable, the preparation hoist and mount of being convenient for, and the practicality is extremely strong.

Claims

1. The utility model provides a hydraulic turbine seat ring overhauls platform, includes that a plurality of platform units (1) connect to form its characterized in that: platform unit (1) include first crown plate (2) and second crown plate (3), be connected with inner circle board (4) and outer lane board (5) between first crown plate (2) and second crown plate (3), be equipped with a plurality of corresponding through-holes (9) on first crown plate (2) and second crown plate (3), the both ends of first crown plate (2) and second crown plate (3) all are equipped with connecting plate (7), be equipped with fastening bolt (8) on connecting plate (7), a plurality of platform units (1) are connected fixedly through fastening bolt (8) of connecting plate (7) of mutual contact.

2. The turbine shroud ring service platform of claim 1, further comprising: a plurality of rib plates (6) are arranged between the first annular plate (2) and the second annular plate (3).

3. The turbine shroud ring service platform of claim 2, further comprising: the rib plate (6) is positioned between two adjacent through holes (9) on the first annular plate (2) and the second annular plate (3).

4. The turbine shroud ring service platform of claim 1, further comprising: the inner ring plate (4) is provided with a plurality of slot plates (11), and the slot plates (11) are provided with fences (10).

5. The turbine shroud ring service platform of claim 4, further comprising: the fence (10) is provided with a locking plate (12).

6. The turbine shroud ring service platform of claim 1, further comprising: and hoisting holes (13) are formed in the first annular plate (2).