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Steam-turbine high-pressure main-throttle-valve equilibrated valve spring pretightening force measurement tool

A spring preload, measuring tool technology, applied in mechanical clearance measurement, force/torque/work measuring instruments, measuring devices, etc., can solve the problems of affecting measurement accuracy, unsafe operators, and insufficient valve stem displacement. Achieve the effect of improving measurement accuracy, ensuring safety, and improving work efficiency

Inactive Publication Date: 2017-02-08
SHANGHAI BAOSTEEL IND TECHNOLOGICAL SERVICE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This measurement method is inefficient and unsafe for operators. The lever pressing personnel need to climb higher than the upper part of the main steam valve without a working platform. The lever is easy to slip against the end of the valve stem, and the measurement accuracy is low. If the displacement is not in place, it will seriously affect the measurement accuracy

Method used

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  • Steam-turbine high-pressure main-throttle-valve equilibrated valve spring pretightening force measurement tool
  • Steam-turbine high-pressure main-throttle-valve equilibrated valve spring pretightening force measurement tool

Examples

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Embodiment Construction

[0012] Example figure 1 As shown, the steam turbine high-pressure main valve pre-opening valve spring preload measuring tool of the present invention includes a U-shaped bracket 1, a thimble bolt 2, a dial indicator 3 and two fixed pressure plates 4, and the center of the top of the U-shaped bracket 1 is provided with a Screw hole, the thimble bolt 2 is screwed in the screw hole, the screw hole side of the U-shaped bracket 1 has a measuring hole, the dial gauge 3 is located on the top of the U-shaped bracket 1 and the measuring probe The needle 31 protrudes into the measuring hole, and the two fixing platens 4 have through holes and are respectively arranged horizontally on both sides of the U-shaped bracket 1 .

[0013] Preferably, the measuring tool further includes two bushings 5 ​​, and the two bushings 5 ​​are vertically arranged on the bottom surfaces of the two fixed platens 4 and communicate with the through holes of the fixed platens 4 .

[0014] like figure 2 As s...

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Abstract

The invention discloses a steam-turbine high-pressure main-throttle-valve equilibrated valve spring pretightening force measurement tool. A center of a U-shaped support top of the measurement tool is provided with a screw hole. A thimble bolt is screwed in the screw hole. One side of a screw hole of the U-shaped support is provided with a measuring hole. A dial indicator is arranged on the U-shaped support top and a measured probe is inserted into the measuring hole. Two fixed pressing plates are provided with through holes and are horizontally arranged on two sides of a U-shaped support respectively. By using the tool, a gap measurement of a main throttle valve rod and an equilibrated valve head can be conveniently performed; work efficiency and measured precision are increased; and safety of work measurement is ensured.

Description

technical field [0001] The invention relates to a tool for measuring spring pretightening force of a high-pressure main steam valve pre-opening valve of a steam turbine. Background technique [0002] A steam turbine is a rotary power machine that converts the energy of steam into mechanical work. It is mainly used as a prime mover for power generation, and can also directly drive various pumps, fans, compressors or ship propellers. Generally, the intake parameters of the steam turbine are 170 absolute atmospheric pressure and 538°C, and the exhaust parameters of the high-pressure cylinder are 38.9 absolute atmospheric pressure and 332.4°C. The steam turbine is equipped with a horizontal high-pressure main steam valve, which is integrated with the steam chamber for adjusting the steam valve. Once a fault occurs, the high-pressure main steam valve can reliably cut off the intake of the steam turbine, thereby performing an emergency shutdown. [0003] The high-pressure main st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L5/00G01B5/14
Inventor 戴毅高峰孟经纬田志明
Owner SHANGHAI BAOSTEEL IND TECHNOLOGICAL SERVICE
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