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Probe and method for measuring humidity of wet steam by rigid microwave coaxial line

A technology of humidity measurement and coaxial line, applied in the field of wet steam humidity measurement probe, can solve the problems of inability to accurately measure wet steam humidity, heat dissipation and thermal inertia, and difficulty in accurate measurement of heating amount, etc. Conducive to the effect of accurate measurement, fast heating and reducing thermal inertia

Inactive Publication Date: 2015-03-25
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
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Problems solved by technology

The use of electric heating has disadvantages such as low heat transfer efficiency, long heating section, many links for heat dissipation and thermal inertia, difficulty in accurate measurement of heating capacity, and easy damage to heating elements, so that the humidity of wet steam cannot be accurately measured.

Method used

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  • Probe and method for measuring humidity of wet steam by rigid microwave coaxial line
  • Probe and method for measuring humidity of wet steam by rigid microwave coaxial line
  • Probe and method for measuring humidity of wet steam by rigid microwave coaxial line

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Embodiment Construction

[0026] The present invention is described in further detail below in conjunction with accompanying drawing:

[0027] refer to figure 1 and figure 2, the moisture vapor humidity measuring probe utilizing microwave hard coaxial cable according to the present invention comprises a hard coaxial cable outer conductor 8, a sampling head 21, an end connector 1, an outer sleeve 7, a rear end cover 23, and a draft tube 22. Regulating valve 18, vacuuming equipment, T-shaped positioning bracket 11, ceramic sleeve 12, hard coaxial inner conductor 9, microwave source 5, microwave power meter 4, porous corundum rod 10, hard coaxial terminal resistance 13 and data acquisition system 3; one end of the hard coaxial outer conductor 8 and one end of the sampling head 21 are all sleeved in the end connector 1, and the sampling head 21 is connected with the hard coaxial outer conductor 8, and the outer casing 7 The two ends of the two ends are respectively socketed on the end connector 1 and th...

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Abstract

The invention discloses a probe and method for measuring the humidity of wet steam by a rigid microwave coaxial line. The probe comprises a rigid coaxial line outer conductor, a sampling head, an end part connecting piece, an outer sleeve pipe, a rear end cover, a flow guide pipe, an adjusting valve, vacuum pumping equipment, a T-shaped positioning bracket, a ceramic sleeve pipe, a rigid coaxial line inner conductor, a microwave source, a microwave power meter, a porous corundum bar, a rigid coaxial line terminal resistor and a data acquisition system. The probe can accurately measure the humidity of the wet steam.

Description

technical field [0001] The invention relates to a wet steam humidity measuring probe and method, in particular to a wet steam humidity measuring probe and method using a microwave hard coaxial line. Background technique [0002] As a working medium, wet steam is widely used in various engineering practices, especially in the field of power engineering. For example, in a steam turbine, flowing wet steam not only causes a decrease in unit efficiency, but also causes water erosion to the cylinder and blades. Measuring the humidity of the flowing wet steam in the steam turbine (especially the humidity of the exhaust steam) is an important content of the thermal test of the steam turbine, and it is also an important basis for evaluating the performance of the unit and improving the design of the unit. [0003] The methods of humidity measurement in steam turbines are mainly thermal method and optical method. The thermodynamic method cannot measure the particle size of water dro...

Claims

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Application Information

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IPC IPC(8): G01N25/62G01N25/20
Inventor 李亮吴昕张安学
Owner XI AN JIAOTONG UNIV
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