[논문]풋 밸브가 적용된 지열 천공 DTH 해머의 성능 특성에 대한 실험적 연구

조민재; 심정보; 김영원

doi:10.17664/ksgee.2021.17.1.014

[국내논문] 풋 밸브가 적용된 지열 천공 DTH 해머의 성능 특성에 대한 실험적 연구
Experimental Study on the Performance Characteristics of Geothermal DTH Hammer with Foot Valve 원문보기

한국지열에너지학회논문집 = Transactions of the Korea Society of Geothermal Energy Engineers, v.17 no.1, 2021년, pp.14 - 22

조민재 ((주)심원개발 생산관리부) , 심정보 (한양대학교 기계공학부, 한국생산기술연구원 스마트에너지나노융합연구그룹) , 김영원 (한국생산기술연구원 스마트에너지나노융합연구그룹)

Abstract ▼ AI-Helper

Drilling equipment is an essential part used in various fields such as construction, mining, etc., and it has drawn increasing attention in recent years. The drilling method is generally divided into three types. There are a top hammer method that strikes on the ground, a DTH (Down-The-Hole) method that directly strikes a bit in an underground area, and a rotary method that drills by using rotational force. Among them, the DTH method is most commonly used because it enables efficient drilling compared to other drilling methods. In the conventional DTH hammer, the valve between the piston and the bit is opened and closed using a face to face method. In order to improve the power of the DTH hammer, a DTH hammer with foot valve which is capable of instantaneous opening and closing is used in the drilling field. In this study, we designed a lab-scale DTH hammer with the foot valve, and manufactured an evaluation device for the experiment of the DTH hammer. In addition, we analyzed the performance of the DTH hammer adopted with foot valve according to the pressure range of 3-10 bar. As a result, the internal pressure distribution in the DTH hammer was experimentally analyzed, and then, the movement of the piston according to the pressure was predicted. We believe that this study provides the useful results to explain the performance characteristics of the DTH hammer with the foot valve.

주제어

표/그림 (8)

그림 Fig. 1. Structure of DTH hammer
그림 Fig. 2. Schematic diagram of DTH hammer
그림 Fig. 3. Design procedure of DTH hammer
그림 Fig. 4. Schematic diagram of experiment device
그림 Fig. 5. Pressure (P2) distribution of DTH hammer
그림 Fig. 6. Pressure (P3) distribution of DTH hammer
그림 Fig. 7. Pressure (P4) distribution of DTH hammer
그림 Fig. 8. Pressure distribution of P2, P3 and P4 with time

참고문헌 (17)

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