Cylinder valve type water turbine with three rows of blade grids

Abstract

The invention relates to the field of water turbines, and discloses a cylindrical valve type water turbine with three rows of blade grids, and an outer upper flange, an inner upper flange, an inner upper ring plate, an outer upper ring plate, an outer fixed guide vane, an inner fixed guide vane, a lower ring plate and a volute are welded to form a basic structure of the cylindrical valve type water turbine. The cylinder valve assembly, the top cover assembly and the bottom ring are assembled with the foundation structure through long bolts and transition flanges. The cylinder valve can operate independently of the internal fixed guide vane and the top cover, so that the top cover and the internal fixed guide vane can be maintained possibly, a treatment method for coping with special conditions is added, and the maintenance flexibility of the water turbine is improved; the overhauling speed is increased; and the maintenance economy is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of water turbines, and in particular relates to a three-row blade cascade cylinder valve type water turbine. Background Art

[0002] When a turbine is under maintenance, it is necessary to temporarily block the water flow from the turbine. For turbines with high head or long water diversion pipes, a cylinder valve turbine is usually used to achieve this purpose. In the common cylinder valve turbines, the cylinder valve is arranged at the flange on the top cover, which brings great trouble to the subsequent maintenance of the top cover, runner and fixed guide vanes, making the maintenance process cumbersome and greatly increasing the maintenance time and cost. Summary of the invention

[0003] In order to solve the above problems, the purpose of the present invention is to provide a three-row cascade cylinder valve type water turbine structure. The structure can meet the functions of the existing cylinder valve type water turbine, and can also meet the needs of separate maintenance of the top cover, runner, movable guide vanes, etc., solving the problems existing in the maintenance of the existing cylinder valve type water turbine.

[0004] The technical solution adopted by the present invention is: an outer upper flange, an inner upper flange, an inner upper ring plate, an outer upper ring plate, an outer fixed guide vane, an inner fixed guide vane, a lower ring plate, and a volute are welded as the basis of a cylinder valve type turbine; a cylinder valve assembly, a top cover assembly, and a bottom ring are assembled with the above-mentioned basis through long bolts and a transition flange; an upper seal is arranged at the joint position between the cylinder valve assembly and the inner upper ring plate, and a lower seal is arranged at the joint position between the cylinder valve assembly and the lower ring plate.

[0005] As a preferred implementation, the lower ends of the inner fixed guide vane and the outer fixed guide vane are welded to the lower ring plate, and the upper ends are welded to the inner upper ring plate and the outer upper ring plate respectively.

[0006] As a preferred implementation, the cartridge valve is clearance-fitted with the inner upper ring plate, the outer upper ring plate, the outer fixed guide vane, and the inner fixed guide vane.

[0007] As a preferred implementation, the upper end of the inner upper ring plate is welded to the inner upper flange.

[0008] As a preferred implementation, the upper end of the outer upper ring plate is welded to the outer upper flange.

[0009] As a preferred embodiment, the cartridge valve assembly is connected to the inner upper flange via long bolts and a transition flange;

[0010] As a preferred implementation, the cartridge valve assembly is connected to the outer upper flange via long bolts and a transition flange.

[0011] As a preferred implementation, the top cover is directly fixed to the inner side of the inner upper ring plate by means of studs.

[0012] As a preferred implementation manner, the bottom ring and the lower flange welded to the lower ring plate are fixed to the bottom ring by bolts.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The present invention can realize the function of removing the top cover under special circumstances, thereby increasing the means for dealing with special circumstances.

[0015] 2. The present invention can reduce the height requirement of the top cover to a certain extent, lighten the overall mass of the top cover, and reduce the stress on the inner ring of the seat ring.

[0016] 3. The present invention provides more space on the top cover, increasing the flexibility of arranging other structures such as the relay.

[0017] 4. The present invention reduces the workload of overhauling the top cover, the impeller, and the movable guide vane, saves the overhaul time, and reduces the overhaul cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention;

[0019] Markings in the figure: 1-cylinder valve assembly, 2-top cover assembly, 3-external upper flange, 4-inner upper flange, 5-inner upper ring plate, 6-external upper ring plate, 7-external fixed guide vane, 8-inner fixed guide vane, 9-movable guide vane, 10-lower ring plate, 11-lower flange, 12-bottom ring, 13-volute, 14-pit lining, 15-long bolts, 16-transition flange, 17-upper seal, 18-lower seal. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and beneficial effects of the present invention clearer, further explanation will be given below in conjunction with the accompanying drawings and specific embodiments, but each embodiment does not constitute a limitation of the present invention. The specific embodiments described in the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0021] The exemplary embodiments of the technical features of the present invention are described in detail below in detail so that the present invention is fully understood. However, for those skilled in the art, the present invention can still be implemented without the need for some of the following details. The following description of the implementation examples is only for a better understanding of the present invention through the examples of the present invention. The present invention is by no means limited to any method provided below, but covers any modification, replacement and improvement of elements, parts and methods without departing from the spirit of the present invention. In the accompanying drawings and the following description, known structures and prior art are not shown to avoid unnecessary fuzzy understanding of the present invention.

[0022] like Figure 1 As shown, the inner upper ring plate 5, the outer upper ring plate 6, the inner fixed guide vane 7, the outer fixed guide vane 8, the lower ring plate 10 and the volute 13 are welded together to form a whole, which can serve as the basis of the entire structure.

[0023] The lower ends of the inner upper flange 3 and the outer upper flange 4 are respectively welded to the inner upper ring plate 5 and the outer upper ring plate 6, and the upper ends are connected to the cylinder valve assembly 1 through long bolts 15. At the same time, the lower end of the machine pit lining 14 is welded to the outer side of the outer upper flange 3.

[0024] The top cover 2 located at the center is fixed to the inner upper ring plate 5 by bolts.

[0025] The upper end of the lower flange 11 is welded to the lower part of the lower ring plate 10, and the lower flange 11 is fixed to the bottom ring 12 by bolts.

[0026] Since there is no direct assembly relationship between the top cover and the cylinder valve assembly, the working state of the cylinder valve does not directly affect the top cover. Therefore, when the cylinder valve is in a working state under maintenance conditions, it will not affect the disassembly and assembly of the internal top cover.

[0027] When it is necessary to remove the top cover to inspect the inside of the turbine, first drop the gate in the cylinder valve to isolate the water on the side of the external fixed guide vane. After the water inside the turbine is drained, the top cover can be lifted by the circular crane on the upper part of the pit.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A three-row cascade cylinder valve turbine, characterized in that: An outer upper flange (3), an inner upper flange (4), an inner upper ring plate (5), an outer upper ring plate (6), an outer fixed guide vane (7), an inner fixed guide vane (8), a lower ring plate (10), and a volute (13) are welded to form a structural foundation of a cylinder valve type water turbine. A cylinder valve assembly (1), a top cover assembly (2), and a bottom ring (12) are assembled with the structural foundation through long bolts (15) and a transition flange (16). An upper seal (17) is arranged at a matching position between the cylinder valve assembly (1) and the inner upper ring plate (5), and a lower seal (18) is arranged at a matching position between the cylinder valve assembly (1) and the lower ring plate (10).

2. A three-row cascade cylinder valve turbine according to claim 1, characterized in that: The lower ends of the inner fixed guide vane (7) and the outer fixed guide vane (8) are welded to the lower ring plate (10), and the upper ends are respectively welded to the inner upper ring plate (5) and the outer upper ring plate (6).

3. The three-row cascade cylinder valve turbine according to claim 1, characterized in that: The cylinder valve assembly (1) is clearance-matched with the inner upper ring plate (5), the outer upper ring plate (6), the outer fixed guide vane (7), and the inner fixed guide vane (8).

4. The three-row cascade cylinder valve turbine according to claim 1, characterized in that: The upper end of the inner upper ring plate (5) is welded to the inner upper flange (4).

5. The three-row cascade cylinder valve turbine according to claim 1, characterized in that: The upper end of the outer upper ring plate (6) is welded to the outer upper flange (3).

6. The three-row cascade cylinder valve turbine according to claim 1, characterized in that: The cartridge valve assembly (1) is connected to the inner upper flange (4) via long bolts (15) and a transition flange (16); the cartridge valve assembly (1) is connected to the outer upper flange (3) via long bolts (15) and a transition flange (16).

7. The three-row cascade cylinder valve turbine according to claim 1, characterized in that: The top cover (2) is directly fixed to the inner side of the inner upper ring plate (5) via studs.

8. The three-row cascade cartridge valve turbine according to claim 1, characterized in that: The bottom ring (12) is fixed to the bottom flange (11) welded to the bottom ring plate (10) by bolts.

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