Gauge and method for measuring size of transformation position of minor-diameter deep hole

A technology of small diameter and variable diameter, which is applied in the field of inspection of the size of the inner hole variable diameter, can solve the problems of the manufacturer's measurement and discovery, the size of the variable diameter section is out of tolerance, and cannot be worn out normally, so as to improve the installation efficiency, Guarantee the progress of construction and the effect of convenient and fast operation

Active Publication Date: 2012-10-24
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the processing of multi-piece end plugs, due to tool wear or human error, the size of the variable diameter section is out of tolerance, which cannot be measure

Method used

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  • Gauge and method for measuring size of transformation position of minor-diameter deep hole
  • Gauge and method for measuring size of transformation position of minor-diameter deep hole
  • Gauge and method for measuring size of transformation position of minor-diameter deep hole

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Example Embodiment

[0035] Example 1:

[0036] The invention discloses a test gauge, which is used to test whether the size of the reduced diameter of a small diameter deep hole is qualified, such as figure 1 with 2 As shown, it includes two parts: a sleeve 4 and a measuring rod 5. The side wall and upper end of the measuring rod 5 are provided with a guide head 6 and a tapered head 7, respectively. The sleeve 4 is provided with a measuring rod along its central axis. Channel, the measuring rod 5 and the tapered head 7 can move up and down along the measurement channel; the distance between the lower end surface of the guide head 6 and the lower end surface of the tapered head 7 is the same as the length of the measurement channel, and in the non-measurement state, The lower end surface of the guide head 6 is placed on the end surface of the sleeve 4, and the measuring rod 5 is supported by the guide head 6, so that the bottom end of the tapered head 7 is flush with the bottom end of the sleeve 4; T...

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Abstract

The invention discloses a gauge for measuring the size of a transformation position of a minor-diameter deep hole. The gauge comprises a casing and a measuring rod. A sidewall and an upper end face of the measuring rod are respectively provided with a guide head and a conical head, the casing is provided with a measuring passage, and the measuring rod and the conical head can move along the measuring passage. The distance from a lower end face of the guide head to a lower end face of the conical head is identical to the length of the measuring passage. A lower end of the casing is a conical face which is matched with a first conical guide section of the minor-diameter deep hole in shape, and the conical head is matched with a second conical guide section of the minor-diameter deep hole in shape. The bottom of the conical face, the top of the conical head and the transformation position of the minor-diameter deep hole are of a same diameter. A guiding slot is arranged on an upper end face of the casing, and the depth of the guide slot is larger or equal to a qualified inserting depth of the measuring rod. The guide head can move along the guide slot when rotating to the guide slot. The invention further discloses a method for the above gauge. By the aid of the gauge and the method, the size of the transformation position of the minor-diameter deep hole can be measured conveniently, quickly and accurately.

Description

technical field [0001] The invention relates to a test gauge and a test method for the dimension of the variable diameter of a small-diameter deep hole, in particular to the test of the dimension of the variable diameter of the inner hole of the upper support column assembly end plug of the internal component of a pressurized water type nuclear reactor. Background technique [0002] In the structural design of the internal components of the pressurized water nuclear reactor, the upper support column assembly is used to provide guidance and support for the thermocouple measuring the outlet temperature of the core. The end plug of the upper support column assembly is designed with a small diameter variable diameter deep hole. The thermocouple provides support and positioning. When the thermocouple is installed normally, it should pass through the end plug, and its end should be positioned with the variable diameter part of the end plug. [0003] During the reactor installation...

Claims

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Application Information

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IPC IPC(8): G01B5/00
Inventor 饶琦琦李娜舒翔何培峰胡朝威夏欣钟元章
Owner NUCLEAR POWER INSTITUTE OF CHINA
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