A kind of draft tube which is easy to assemble and connect

The technology of draft water pipe and conical pipe is applied in the field of draft water pipe which is easy to be assembled and connected, which can solve the problems of difficulty in installation and connection, and achieve the effects of facilitating on-site operation and construction, reducing backflow phenomenon and reducing operation difficulty.

Inactive Publication Date: 2019-07-09
GUANGDONG TECHN COLLEGE OF WATER RESOURCES & ELECTRIC ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the rectifier adopts a cylindrical cylinder as a whole, which is difficult to install and connect.

Method used

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  • A kind of draft tube which is easy to assemble and connect
  • A kind of draft tube which is easy to assemble and connect
  • A kind of draft tube which is easy to assemble and connect

Examples

Experimental program
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Effect test

Embodiment approach

[0041] The present invention is provided with rectifier 2 according to design and on-site construction needs, as the first embodiment of the present invention, as figure 2 As shown, the rectifying barrel is formed by piecing together four rectifying pieces 2; as the second embodiment of the present invention, as image 3 As shown, the rectifying barrel is formed by piecing together three rectifying pieces 2 .

[0042] Such as figure 2 with image 3 As shown, in order to further reduce the pressure difference between the axial center and the periphery of the tapered pipe section 1 and effectively suppress the generation and influence of eccentric vortex, gaps 4 are provided between adjacent rectifying segments 2 .

[0043] As a first embodiment of the present invention, the rectifier 2 is fixedly connected to the inner side of the tapered pipe section 1 by welding or screwing the fixing rod 3 .

[0044] As a third embodiment of the present invention, the rectifying blades ...

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PUM

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Abstract

The invention discloses a draft tube convenient to assemble and connect. The draft tube comprises a conical tube section, flow regulating pieces and fixing rods, wherein each flow regulating piece isa cylindrical piece body, the multiple flow regulating pieces are arranged in the conical tube section and are arranged coaxial with the conical tube section to form a flow regulating cylinder, and each flow regulating piece is connected with the inner side of the conical tube section through the corresponding fixing rod. The flow regulating cylinder is formed by splicing the multiple flow regulating pieces, and each flow regulating piece is connected with the inner side of the conical tube section through the corresponding fixing rod, and due to the fact that the design structure is adopted,field operation construction by people is facilitated, and the operation difficulty is lowered.

Description

[0001] 【Technical field】 [0002] The invention relates to the technical field of fluid machinery and engineering equipment, in particular to a draft tube for easy assembly and connection. [0003] 【Background technique】 [0004] A water turbine is a power machine that converts the kinetic energy of water flow into mechanical energy, and belongs to the turbomachinery in fluid machinery. Most of the modern hydraulic turbines are installed in hydropower stations to drive power generation equipment. Generally, hydraulic turbines are equipped with draft tubes. The draft tubes are usually designed as elbows with diameters and cross-sectional areas that increase from small to large. The water flow at the outlet of the runner passes through the draft tube. When the water pipe is used, the flow velocity drops and the pressure rises, forming an inverse pressure field, so the draft tube is also called a diffuser tube. Its function is to discharge the water flow at the outlet of the runn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03B11/00F03B3/18
CPCF03B3/18F03B11/00Y02E10/20
Inventor 杨栗晶
Owner GUANGDONG TECHN COLLEGE OF WATER RESOURCES & ELECTRIC ENG
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