A rebound rebound instrument for engineering supervision

Abstract

The invention discloses a resilience tester for engineering supervision, which relates to the technical field of engineering supervision, and comprises a cylinder body and an impact hammer. There is a center guide rod inside, one end of the center guide rod is covered with a bullet rod, the other end is fixed with a guide flange and a firing mechanism, and the outside of the bullet rod is covered with a spring spring, and the bullet rod faces the side of the center guide rod. One end is provided with a guide blind hole, and the bottom wall of the guide blind hole is fixed with a grease reservoir containing grease, and a channel is opened in the direction of the inner axis of the central guide rod, and a plurality of micro-holes communicating with the channel are opened on the surrounding wall. When the center guide rod extends into the inside of the ejection rod, the grease reservoir is connected to the channel, and the grease can enter the center guide rod through the grease reservoir and lubricate its peripheral side, and the outer wall of the center guide rod is realized through the grease reservoir. Self-lubricating, thereby reducing the resistance of the hammer movement and improving the detection accuracy.

Description

technical field [0001] The invention relates to the technical field of engineering supervision, in particular to a rebound hammer for engineering supervision. Background technique [0002] With the continuous advancement of my country's urbanization process, the application of rebound hammers in urban construction has become more and more extensive. Rebound tester, also known as concrete rebound tester, is used to test the strength of various concrete structures such as general building components and bridge components. [0003] The Chinese patent whose patent announcement number is CN206990319U proposes a concrete rebound instrument, which includes a cylinder and an elastic hammer. The two ends of the cylinder are respectively provided with a front port and a rear port for the elastic hammer to slide out. A through hole is arranged in the axial direction, and the inner wall of the through hole is slid along the axial direction to be provided with a snap rod with one end ex...

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned existing technical solutions have the following defects: during the long-term use of the hammer, the accuracy will decrease. On the one hand, the source is due to the change in the elastic coefficient of the impact spring, and on the other hand, due to the increase in the sliding resistance of the impact hammer, the latter affects the accuracy. The impact is even greater. The existing technical solutions are to apply grease to the connecting rod after disassembly, which is inconvenient to operate

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