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Single solid bowl type electrode measurement tube in high precision for water level of steam tank, and method for determining geometrical size

A technology of steam drum water level and geometric dimensions, which is applied in the direction of measuring devices, liquid level indicators for physical variable measurement, steam boilers, etc., can solve the problems of large measurement errors and poor sensing reliability, and achieve the effect of improving sampling accuracy

Inactive Publication Date: 2007-07-25
高维信
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0006] In view of the above problems, the present invention provides a single-cylinder high-precision electrode measuring cylinder for drum water level and a method for determining its geometric dimensions, aiming at solving the problem of using the traditional single-cylinder straight cylindrical measuring cylinder for boiler drum water level above 10Mpa pressure. The problem of large measurement error and poor sensing reliability makes its measurement accuracy, dynamic response speed and sensing reliability all meet the requirements of high pressure, ultra-high pressure, subcritical boiler drum zero water level monitoring and water level shutdown protection

Method used

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  • Single solid bowl type electrode measurement tube in high precision for water level of steam tank, and method for determining geometrical size
  • Single solid bowl type electrode measurement tube in high precision for water level of steam tank, and method for determining geometrical size
  • Single solid bowl type electrode measurement tube in high precision for water level of steam tank, and method for determining geometrical size

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Effect test

Embodiment 1

[0035] Accompanying drawing 1, 2 clearly shows the similarity and difference between the present invention and the traditional single cylinder straight cylinder measuring cylinder structure and sampling system of steam drum water level. The similarities: the steam and water sampling hole connectors 1 and 2 of the steam drum and the center distance L are consistent; the specifications of the steam and water sampling connectors 3a, 4a, 3 and 4 are the same, and they are respectively the same as the steam and water sampling ports on the steam drum. The measuring holes are connected; the center distance between the steam and water sampling pipes and the length of the steam and water sampling sections 5a and 5 are both L; the water chamber cylinder below the water sampling pipe has water end covers 7a and 7, and there is a sewage discharge pipe under the water end cover 8a, 8; and both contain electrode assemblies. The difference is that the distance between the steam sampling conn...

Embodiment 2

[0038] As shown in Figure 5, the large steam chamber is in a horizontal shape, and the axes of the large steam chamber cylinder body 10 and the measuring section cylinder body 5 are perpendicular to each other, which is a T-shaped large steam chamber fine water column electrode measuring cylinder. The two ends of the large steam chamber cylindrical body 10 are sealed by end caps 14,15. The through-flow anti-splash connecting pipe assembly at the connection between the cylinder body of the large steam chamber and the cylinder body of the measuring section is composed of a connection seat 16 , an equal-flow water cylinder 17 and a steam cylinder 18 . The shoulder plate on the top of the equalizing water tube 17 is connected to the connecting seat 16, the shoulder plate on the bottom of the venting tube 18 is connected to the inner wall of the lower part of the water tube 17, and the radial direction of the water tube 17 has a plurality of equiperipherally distributed small water ...

Embodiment 3

[0039] Embodiment 3, as shown in Figure 7, the large steam chamber adopts a straight cylinder type. The upper part of the cylinder body 10 of the large steam chamber is sealed by an end cover 19 . As shown in accompanying drawings 8 and 9, the through-flow anti-splash joint assembly at the junction of the cylinder body of the large steam chamber and the cylinder body of the measuring section is connected to the end cap 20 with a through-flow hole at the bottom, and the inside of the end cap 20 is provided with a trumpet tube 21 and 4 or 8 current equalizing grid bars 22 . Its flow hole diameter is equal to the inner diameter of the cylinder body 5 of the sampling section, and the flow equalizing grid bar 22 is vertically connected with the straight section of the trumpet tube 21 according to an equiperipheral angle. The saturated steam from the sampling cylinder 5 of the measurement section enters the large steam chamber through the flow hole of the end cover 20, and the cond...

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Abstract

A high accuracy electrode measurement cylinder of steam pocket water level single-cylinder type is prepared for improving structure of traditional single-cylinder measurement cylinder, decreasing surface area of sampling water column cylindrical body i.e. decreasing diameter of cylindrical body and increasing area of steam dome cylindrical body i.e. increasing diameter and height of steam dome for satisfying surface area ratio to be less than 0.7 of water column cylindrical body to steam dome cylindrical body.

Description

Technical field: [0001] The invention relates to the technology in the field of thermal measurement, in particular to a high-pressure, ultra-high-pressure, subcritical boiler drum water level electrode-type sampling sensor measurement technology, specifically a steam drum water level single-tube high-precision electrode measuring tube and its geometric dimension determination method. Background technique: [0002] Drum water level is an important safety parameter for boiler operation. During the operation of the boiler, the steam and water in the steam drum cannot be completely separated, and the interface is an indistinct mixed layer, and the maximum change in humidity along the height direction in the mixed layer is defined as the actual water level. Above the actual water level is the saturated steam chamber, and below is the drum water chamber. Because the actual water temperature in the steam drum is lower than the saturated water temperature, the water is undersatura...

Claims

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Application Information

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IPC IPC(8): G01F23/24F22B37/78G01B21/00G01B21/02
Inventor 高维信
Owner 高维信
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