Welding method of damper plate and flow tube in Coriolis mass flowmeter

A mass flow meter, Coriolis technology, applied in the direction of direct mass flow meter, mass flow measurement device, welding equipment, etc.

Inactive Publication Date: 2010-06-23
SHANGHAI YINUO INSTR
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the key technical problem of manufacturing large-diameter mass flowmeters, this

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  • Welding method of damper plate and flow tube in Coriolis mass flowmeter
  • Welding method of damper plate and flow tube in Coriolis mass flowmeter
  • Welding method of damper plate and flow tube in Coriolis mass flowmeter

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Embodiment Construction

[0015] Further description will be made below in conjunction with the embodiments of the present invention and the accompanying drawings.

[0016] The present invention proposes a method of thickening the damping plate and changing it to manual argon arc welding, and implements the welding of the damping plate and the flow tube in the mass flowmeter. The diameter of the flow tube is set as d, and the thickness of the tube wall is δ. The mass flowmeter can adopt vacuum brazing, but what the present invention will solve is the problem of the large-diameter mass flowmeter, so it is preferable to take δ≥2mm.

[0017] Refer to the accompanying drawings at the same time, perform manual argon arc welding according to the following steps:

[0018] 1) The thickness of the selected damping plate is b=4-5δ;

[0019] 2) Open a hole 1 on the damping plate for the flow tube to pass through;

[0020] 3) Open an annular groove 2 concentric with the aforementioned hole on the damping plate; ...

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Abstract

The invention relates to a welding method of a damper plate and a flow tube in a Coriolis mass flowmeter; the diameter of the flow tube is set as d, the tube wall thickness is delta which is more than or equal to 2mm, manual argon arc welding is carried out by the following steps: the thickness b of the damper plate is selected, b is equal to 4-5delta; a hole is arranged on the damper plate for leading the flow tube to penetrate through; a circular groove which has concentric circle with the hole is arranged on the damper plate; after the flow tube penetrates through the damper plate, the manual argon arc welding is carried out. The bore diameter d of the damper plate is equal to d (1+0.5 percent), the diameter of the inner ring of the circular groove is D+2delta, the diameter of the outer ring of the circular groove is D+5delta, and the depth of the circular groove is 1.5delta. the damper plate is thickened and the circular groove is arranged, so as to realize manual argon arc welding f the damper plate and the flow tube, a huge vacuum brazing furnace is omitted, even if the assembling clearance of the flow tube and the damper plate reaches 0.5mm, even wider clearance exists, welding can be carried out, secondary repair can be carried out to welding line defect, and the method is suitable for the mass flowmeter with more than 2mm of the flow tube wall.

Description

[technical field] [0001] The invention relates to a manufacturing method of a Coriolis mass flowmeter, in particular to a welding method for a damping plate and a flow tube in a Coriolis mass flowmeter. [Background technique] [0002] Coriolis mass flowmeters (mass flowmeters for short) are generally composed of flow tubes, damping plates, detection elements, drive elements and other components. Since their introduction in the late 1970s, they have been widely used in petroleum, chemical and , food, medicine and other industries, the applicable pipe diameter tends to expand. Seen in the reports: after the ELITE series mass flowmeter CMF400 (DN100) produced by Rosemount in the United States was put on the market in 2003, the instrument data of DN200 was introduced in November 2007; There are F series DN250 instruments displayed; the domestic Taihang Instrument Factory put into production DN200 caliber mass flowmeters in 2003, and Dalian Zhonglong put into production DN150 ca...

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Application Information

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IPC IPC(8): B23K9/16G01F1/84
Inventor 郭殿政
Owner SHANGHAI YINUO INSTR
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