Reamer bit

Abstract

The invention discloses a reamer bit. The reamer bit comprises a reamer barrel, an end socket, expanding wing components, a piston component and a detector, wherein the end socket is mounted at the end of the reamer barrel, the piston component slides relatively to the reamer barrel and is suitable for driving the expanding wing components to expand or retract, a first fluid injection passage is formed in the reamer barrel, and the piston component is provided with a first pressure relief passage and a second pressure relief passage. When the piston component drives the expanding wing components to expand in place, the first pressure relief passage is communicated with the first fluid injection passage; when the piston component drives the expanding wing components to retract in place, thesecond pressure relief passage is communicated with the first fluid injection passage, and the detector is suitable for detecting pressure or flow in the first fluid injection passage to check whether the expanding wing components expand or retract in place. The reamer bit has the advantages that expanding wings can be driven and controlled economically and efficiently, so that the reamer bit with improved rigidity is more suitable for hard rock soil, and operators can master operation states of the reamer bit more easily.

Description

technical field [0001] The invention relates to the field of engineering machinery, and more specifically relates to a reaming drill bit. Background technique [0002] With the rapid development of my country's infrastructure construction, the engineering volume of building pile foundations or anchors is increasing, and the requirements for the bearing capacity of pile foundations or anchors are getting higher and higher. Using expanded bottom piles or expanded body anchors is It is an effective means to improve the bearing capacity of single pile or single anchor. [0003] But, also there are some defects in the reaming drill bit in the prior art: [0004] The structure of the traditional reaming bit is relatively thin, and its rigidity is poor. When encountering hard rock and soil, it will often be deformed and easily damaged; [0005] Traditional drill bits generally use a combination of hydraulic drive and spring structure to drive the expansion and retraction of the ex...

AI Technical Summary

Problems solved by technology

[0004] The structure of the traditional reaming bit is relatively thin, and its rigidity is poor. When encountering hard rock and soil, it will often be deformed and easily damaged;

[0005] Traditional drill bits generally use a combination of hydraulic drive and spring structure to drive the expansion and retraction of the expansion wing assembly. The hydraulic structure is used to press down the expansion wing assembly, and the spring structure is used to reset the expansion wing assembly. However, this structure requires little hydraulic pressure. Very large, and the spring is easily damaged;

[0006] In addition, the reaming bit in the prior art has no specific detection and control means for the expansion or retraction state of the expansion wing, and mainly relies on experience operation, and the expansion wing may be stuck by stones in the hole during the expansion or retraction process , which adversely affects the normal reaming operation, the quality and accuracy of the hole cannot be guaranteed, and it is difficult to meet the design requirements

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