Sand blocking type corrugated pipe expansion joint for hydroelectric power station
A technology for bellows and hydropower stations, which is applied to expansion compensation devices for pipelines, pipe elements, pipes/pipe joints/fittings, etc., and can solve the problems of removing the guide tube, shutting down water, large bellows expansion joints, and maintenance operations Difficulty and other problems, to achieve the effect of long service life, convenient production and installation, and low cost
Inactive Publication Date: 2013-02-27
NANTONG SHUGUANG ELECTROMECHINCAL ENG
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Problems solved by technology
This certainly solves the problem that the expansion joint of the bellows is consolidated by sand particles and loses its telescopic deformation function. However, the water must be shut down when the guide tube is removed, and the pres...
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[0008] Such as figure 1 As shown, it is a sand-blocking bellows expansion joint for a hydropower station, including a bellows 2 and a guide tube 3, the bellows 2 is set on the guide tube 3, one end of the bellows 2 is welded to the upstream steel pipe 1, and the bellows 2 The other end is welded to the downstream steel pipe 5 , one end of the guide tube 3 is welded to the upstream steel tube 1 , and an elastic packing 4 is arranged between the guide tube 2 and the bellows 2 .
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Abstract
The invention relates to a sand blocking type corrugated pipe expansion joint for a hydroelectric power station, and relates to a structure of a water diversion pressure pipeline stretching compensator of the hydroelectric power station. The sand blocking type corrugated pipe expansion joint comprises a corrugated pipe and a guide cylinder, wherein the corrugated pipe is sleeved on the guide cylinder, one end of the corrugated pipe is fixedly connected with an upstream steel pipe, and the other end of the corrugated pipe is fixedly connected with a downstream steel pipe; and one end of the guide cylinder is fixedly connected with the downstream steel pipe, and an elastic packing is arranged between the guide cylinder and the corrugated pipe. The sand blocking type corrugated pipe expansion joint provided by the invention has the advantages that the structure is simple, the cost is low, the manufacture and installation are convenient, the service life is long, the sand blocking type corrugated pipe expansion joint can automatically prevent sand grain sundries from entering the gap between the guide cylinder and the corrugated pipe, and meanwhile, the sand blocking type corrugated pipe expansion joint can guarantee not to generate excessive compressive stress on the corrugated pipe; and the sand blocking type corrugated pipe expansion joint can be widely used to circulating pipelines such as water conservancy, electric power and chemical industry.
Description
technical field [0001] The invention relates to the structure of a telescopic compensator for a diversion pressure pipeline of a hydropower station. Background technique [0002] So far, one of the means to solve the displacement of the diversion pipes of hydropower stations due to geological changes or temperature changes is to install bellows expansion joints between the pipes. This expansion joint is composed of a bellows and a guide tube. Since the gap between the bellows and the guide tube is subjected to radial or angular displacement, the gap is changed. When the sand or debris in the water flow passes through the gap Entering and depositing in the bellows, these sand particles or sundries accumulate for a long time, which will cause the bellows to fail to deform properly, so that the bellows expansion joint has no telescopic function. In order to restore the telescopic function of the bellows expansion joint, it is only possible to periodically remove the guide tube...
Claims
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IPC IPC(8): F16L51/02
Inventor 胡德琴
Owner NANTONG SHUGUANG ELECTROMECHINCAL ENG
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