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On-line verification method and device for safety valve

A technology of calibration device and safety valve, which is applied in the testing of measuring devices, instruments, and mechanical parts, etc., can solve the problems of long order cycle of spare parts of safety valve and affect normal production, so as to reduce labor intensity and ensure normal operation. , the effect of prolonging the working cycle

Active Publication Date: 2017-10-20
GUANGXI HUAYIN ALUMINUM
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Every year, about 4,800 manpower are invested in dismantling, maintenance, calibration, installation and other processes, and the direct material loss is about 120,000 yuan; and the order cycle for spare parts of the safety valve is very long, and once it is damaged during the disassembly process, normal production will be affected

Method used

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  • On-line verification method and device for safety valve
  • On-line verification method and device for safety valve
  • On-line verification method and device for safety valve

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Embodiment Construction

[0026] The method and device for on-line verification of a safety valve according to the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0027] see figure 1 and figure 2 , is the first embodiment of an on-line calibration device for a safety valve of the present invention, which includes a displacement sensor 1, a force sensor 2, a lifting rod 3 and a fastener 4, and the displacement sensor 1 and the force sensor 2 use wires and a control system 5 Connect, this control system 5 is made of computer and motor.

[0028] The valve stem 61 of the safety valve 6 is provided with an external thread.

[0029] The fastener 4 includes a nut 41 , a washer 42 and a fixing cap 43 , and the width of the fixing cap 43 is relatively larger than that of the nut 41 . The fixing cap 43 is embedded in the external thread of the valve stem 61 , and is screwed with the valve stem 61 through the nut 41 to prevent the fix...

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Abstract

The invention provides an on-line safety valve checking method and device. A safety valve is subjected to online checking through the device, the device comprises a force sensor mounted on a lifting rod, the force sensor is connected with a control system, the safety valve is arranged on a pressure vessel with slurry in the lower portion and steam in the upper portion, in a normal working pressure range of the safety valve, the control system controls lifting height and opening time of a valve stem of the safety valve by the device, and the device is enabled to finish checking after the slurry arrives at a valve port of the safety valve. Therefore, influence on sealing performance of the safety valve due to discharge of a viscous medium in a flash evaporator is avoided, further the operating period of the flash evaporator can be prolonged, cost in a series of working processes of detachment, lifting, transportation, checking, reassembling and the like during online and offline checking of the safety valve can be omitted, labor intensity of workers is lowered, and normal operation of companies is guaranteed.

Description

【Technical field】 [0001] The invention relates to a method and device for calibrating a safety valve, in particular to an on-line calibrating method and device for a safety valve in a slurry process of a flasher in an alumina dissolution system. 【Background technique】 [0002] The production methods of alumina include acid method, alkali method and thermal method. At present, the practical application of alumina production is the alkali method. Alkali method also includes Bayer method, sintering method and various forms of combined method. Due to the low production cost and good economic benefits of the Bayer method, the process is relatively simple and the most widely used. [0003] Bayer production is divided into three stages of dissolution, decomposition and calcination, including crushing and wet grinding, bauxite dissolution, red mud separation and washing, sodium aluminate solution plus seed decomposition, aluminum decomposition mother liquor evaporation, and sodium...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M13/00
Inventor 李学军刘永刚赵锡进刘孟端张观玉刘健农圣高
Owner GUANGXI HUAYIN ALUMINUM
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