Spanner capable of controlling extension lengths of through bolt

Abstract

A spanner capable of controlling the extension lengths of a through bolt mainly solves the problem of the prior art that the through bolt is installed manually, and therefore the extension lengths of the two ends of the through bolt are different. The spanner comprises a spanner body, a nut clamping sleeve and a positioning mechanism, wherein the nut clamping sleeve is embedded in the spanner body, a second stepped hole used for clamping a nut is formed in the center of the nut clamping sleeve, the positioning mechanism is arranged on the end face of the side, provided with steps, of the head of the spanner body and comprises a positioning plate, a fastening screw and a positioning sliding block, a slotted hole is formed in the middle of the positioning plate, a scale plate is arranged on one side of the positioning plate, the zero graduation line of the scale plate is flush with the end face of the non-stepped side of the head of the spanner body, the fastening screw and the positioning sliding block are located on the two sides of the slotted hole and are in threaded connection, and sliding and locking of the positioning sliding block can be achieved by rotating the fastening screw. By the adoption of the spanner, the extension lengths of the two ends of the through bolt can be controlled accurately during installation.

Description

Technical field [0001] The invention relates to the technical field of hardware tools, in particular to a wrench capable of controlling the extension length of a core bolt. Background technique [0002] In the process of installation of engineering equipment, pipeline installation is very common. Flange connection is a common pipeline connection method. Specifically, flanges are cast on both ends of the pipeline butted and sealed on the flange end faces. The groove is equipped with a sealing ring, and the pipes are tightly connected together with bolts or core bolts after butting. Flange connection has a very wide range of applications in pipeline connections in many fields such as electricity, petroleum, and chemical industries. Usually there are liquids in the connected pipelines. These liquids are oil or other dangerous chemical materials, such as the cooling of large transformers. The oil circuit contains cooling oil, which is used to continuously circulate to cool the trans...

AI Technical Summary

Problems solved by technology

[0005] In view of the prior art, the core-through bolts are manually installed, and it is not easy for workers to grasp the protruding lengths of both ends of the core-through bolts during construction, resulting in the problem that the protruding lengths of the two ends of the core-through bolts are different. The purpose of the present invention is to Provide a wrench that can control the extension length of the core bolt, and accurately control the extension length of both ends of the core bolt during the installation process

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