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Pneumatic down-the-hole hammer drilling device

A technology of drilling device and down-the-hole hammer, which is applied in the direction of driving device for drilling in borehole, earthwork drilling, drilling equipment, etc. It can solve the problems of affecting drilling efficiency and difficulty in slag discharge, so as to reduce the escape of slag, Ensure the effect of improving drilling efficiency and storage efficiency

Pending Publication Date: 2022-05-27
中冶华南建设工程有限公司
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Problems solved by technology

[0004] In view of the related technologies mentioned above, the inventor believes that when the drilling is too deep, there will be more debris and it is easy to accumulate in the gap between the outer wall of the down-the-hole hammer and the drilling wall. At this time, it is difficult to discharge the slag and affect the drilling. efficiency

Method used

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Embodiment 2

[0053] Embodiment 2, on the basis of embodiment 1, the following settings are made, as Figure 4 As shown, the casing 201 is also provided with an impeller 7 and a second driving mechanism 8 for driving the impeller 7 to rotate, wherein the impeller 7 is located at the entrance of the slag duct 11, and the second driving mechanism 8 is used for driving the impeller 7 to rotate. The direction of rotation of 7 is as Figure 4 shown.

[0054] like Figure 5 , Image 6 As shown, the impeller 7 includes a rotating shaft 71 and three blades 72 fixed on the outer surface of the rotating shaft 71. The rotating shaft 71 is horizontally perpendicular to the sliding direction of the guide plate 3. The two ends are respectively located in the third working chamber 300 opened by the casing 201 , and the hole between the third working chamber 300 and the slag inlet 11 is sealed by a sealing ring.

[0055] The second driving mechanism 8 may be a driving motor that drives the rotating sha...

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Abstract

The pneumatic down-the-hole hammer drilling device comprises a drill rod, an impacter and a drill bit, a rear connector of the impacter is fixedly connected with the drill rod, a drill rod clamping sleeve of the impacter is connected with the drill bit, a shell of the impacter is provided with a slag collecting cavity, an opening of the slag collecting cavity is located in the peripheral face of the shell, and the opening of the slag collecting cavity is communicated with the drill rod. The shell is further provided with a guide plate and a first driving mechanism, the guide plate is located over an opening of the slag collecting cavity, and the end, away from the axis of the shell, of the guide plate is obliquely arranged downwards; the first driving mechanism is used for driving the guide plate to extend out of the outer side of the shell in a sliding mode or retract into the shell in a sliding mode. By arranging the extendable guide plate, when the disintegrating slag is blown by compressed air to move upwards, the movable disintegrating slag is guided into the slag collecting cavity by the guide plate, so that the disintegrating slag accumulation between the outer surface of the shell and the wall of the drill hole is reduced, and the drilling efficiency is ensured.

Description

technical field [0001] The present application relates to the field of drilling equipment, in particular to a pneumatic down-the-hole hammer drilling device. Background technique [0002] Pneumatic down-the-hole hammer is a drilling tool used to form pile holes during the construction of building foundations. The working principle of hole forming is to use the power head installed on the drilling rig to drive the pneumatic down-the-hole hammer to rotate through the drill rod, and to push the piston in the impactor through compressed air to force the impact hammer to reciprocate up and down to achieve rock crushing. [0003] In addition, the compressed air discharged by the DTH hammer will be carried to the ground by the broken rock chips, so as to realize hole cleaning and slag discharge. [0004] In view of the above-mentioned related technologies, the inventor believes that when the drilling is too deep, the slag is large and easy to accumulate in the gap between the oute...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B4/14E21B27/00E21B21/00
CPCE21B4/14E21B27/00E21B21/00
Inventor 李楠霄苏靖胡安建施亮彭军芳
Owner 中冶华南建设工程有限公司
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