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A non-retraction connection device and method of use

A connecting device and backstop technology, applied in the direction of connecting components, screws, threaded fasteners, etc., can solve the problems of easy loosening system operation safety, construction difficulties, etc.

Active Publication Date: 2021-05-07
HARBIN BOILER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems in the prior art that the studs and nuts are easily loosened during operation after they are fixed, which will affect the safety of the system and the difficulty of traditional welding stop-back construction, the invention further proposes a back-stop connection device and its use method

Method used

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  • A non-retraction connection device and method of use
  • A non-retraction connection device and method of use
  • A non-retraction connection device and method of use

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specific Embodiment approach 1

[0020] Specific implementation mode one: combine figure 1 with image 3 Description A non-backward connection device described in this embodiment includes a fully threaded stud 1, a washer 2, a hex nut 3 and a metal insert 4. It is characterized in that: a through hole 1-1 is set at one end of the fully threaded stud 1, The metal insert 4 is set through the through hole 1-1 and the lengths of the metal insert 4 exposed outside the two ends of the through hole 1-1 are L1 and L2 respectively, wherein one end of the metal insert 4 is wound along the circumferential direction of the fully threaded stud 1 On the fully threaded stud 1, the other end of the metal insert 4 is bent along the nut extension direction to the outside of the edge of the connector and fits to the edge of the connector, and the hex nut 3 and washer 2 are sequentially fitted from the other end of the fully threaded stud 1 On fully threaded stud 1.

specific Embodiment approach 2

[0021] Specific implementation mode two: combination figure 1 with image 3 To describe this embodiment, the length L1 of the end of the metal insert 4 exposed outside the through hole 1 - 1 in this embodiment is half of the circumference of the end surface of the fully threaded stud 1 . Other undisclosed technologies and steps are the same as those in the first embodiment.

specific Embodiment approach 3

[0022] Specific implementation mode three: combination figure 1 with image 3 To describe this embodiment, the length L2 of the other end of the metal insert 4 exposed outside the through hole 1 - 1 in this embodiment is twice the distance from the fully threaded stud 1 to the edge of the connector. Other undisclosed technologies and steps are the same as those in the second embodiment.

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Abstract

A back-stop connecting device and its use method, specifically belonging to the application field of studs and nuts, the present invention aims to solve the problem that the studs and nuts in the prior art are easy to loosen during operation after they are fixed, which affects the safety of the system and the traditional welding stop back For the problem of difficult construction, the anti-retraction connection device mentioned in the present invention mainly includes: fully threaded studs, washers, hex nuts and metal inserts. A through hole is set at one end of the fully threaded stud, and the metal insert passes through the through hole, and the One end of the metal inserts passing through the two ends of the through hole is bent and wound on the fully threaded stud, and the other end is bent at a certain angle α and then stuck on the edge of the partition, and the hex nut and washer are sequentially set on the fully threaded stud from the other end , The technical method described in the present invention is mainly used for fixing the partition plate on the inspection hole of the water chamber of the high pressure heater.

Description

technical field [0001] The invention belongs to the application field of studs and nuts, and in particular relates to a back-stop type connection device and a use method. Background technique [0002] At present, high-pressure heaters are widely used in the heat recovery system of large thermal power units and nuclear power units. The partition plate on the inspection hole of the water chamber of the high-pressure heater is connected by studs and nuts. The back gasket is bent and stuck on the edge of the partition of the stud fixing part, but this method requires welding. The welding position is inside the water chamber of the high-pressure heater, and the space is small. It is a high-risk operation in a confined space. It is carried out in this environment Welding operations will bring great hidden dangers to the safety of the operator. Therefore, a non-welding method is required to fix the studs and nuts on the partition plate of the inspection hole of the high-pressure h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16B39/04
CPCF16B39/04
Inventor 郝维勋王兆民魏力民谭舒平王硕徐航李万超李金明
Owner HARBIN BOILER CO LTD