Device for avoiding air leakage of communication pipe valve flange in cogeneration unit
A technology of combined heat and power generation units and connecting pipes, which is applied in the direction of leakage prevention, mechanical equipment, engine components, etc., and can solve the problems of safe operation and reliable heating, leakage of valve flanges of connecting pipes, and steam leakage of connecting pipes, etc. Achieve the effect of improving the vibration situation, avoiding steam leakage and offsetting the deformation gap
Inactive Publication Date: 2016-01-13
HUADIAN ENERGY COMPANY LIMITED
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Problems solved by technology
As the outside temperature decreases, more steam needs to be extracted to ensure the user's heating demand. At this time, the following problems will occur: with the increase of steam extraction, the connecting pipe connected to the low-pressure cylinder 1 has steam leakage. At the same time, it is accompanied by vibration phenomenon. The location of the steam leakage is the flange in front of the LV valve, and the more steam is extracted, the greater the leakage observed
Air leakage has brought serious hidden dangers to the safe operation of the unit and reliable heating, so it is urgent to find the cause of the air leakage of the valve flange of the Unicom pipe and provide corresponding solutions
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[0027] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings. The examples of the embodiments are shown in the drawings. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention. It should not be construed as a limitation of the invention.
[0028] The structure of the connecting pipe of the cogeneration unit in the prior art includes: the main body of the connecting pipe, four air inlets (exhaust ports of the medium-pressure cylinder), two steam outlets leading to the low-pressure cylinder 1 and the low-pressure cylinder 2, and one to the The steam outlet of the first heating station, four pairs of flanges, and two sets of butterfly LV valves. Moreover, the connecting pipe structure includes a three-way structure and a four-way structure. Among them, the material of the connecting pipe is Q235B; the material of the flange pl...
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The invention provides a device for avoiding air leakage of a communication pipe valve flange in a cogeneration unit. A short joint is additionally arranged on a vertical pipe section of the rear end of a communication pipeline connected with a low-pressure cylinder, the position of a level valve (LV) is adjusted to a vertical pipe section of an inlet of the low-pressure cylinder, and meanwhile a metal wound gasket serves as a gasket of the flange. In this way, air leakage of the communication pipe valve flange is avoided, and the vibration condition of the communication pipeline of the unit is effectively relieved.
Description
technical field [0001] The invention relates to the technical field of heating systems, in particular to a device for avoiding steam leakage from a valve flange of a connecting pipe in a cogeneration unit. Background technique [0002] In order to improve the power supply efficiency, it is necessary to carry out heat supply transformation on the combined heat and power unit. The transformation plan that has been implemented is as follows: [0003] (1) Drill holes to extract steam on the connecting pipe of the medium and low pressure cylinder of the steam turbine, and replace the connecting pipe. [0004] (2) The sub-cylinder pressure of the medium and low pressure connecting pipe is about 0.8MPa, and the extraction pressure is set at about 0.8-1.0MPa. [0005] (3) Install regulating butterfly valves (one for each of the two connecting pipes) behind the steam extraction port of the connecting pipe, and adjust the extraction pressure to about 0.8-1.0MPa by adjusting the butte...
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Login to View More IPC IPC(8): F01D11/00F01D17/10
Inventor 毕诗方李涛李树臣张义斌张修君胡静波蒋明东李青贤邱静柏刘满平简健王利军岳峰高原
Owner HUADIAN ENERGY COMPANY LIMITED