• Features and Advantages

  Product Introduction

  DTH hammer is an integral part of DTH drilling rig to connect DTH drill bit and drilling rig. It includes low wind pressure DTH hammer, medium wind pressure DTH hammer, and high wind pressure DTH hammer.

  Application field: It is widely used in metallurgy, coal, chemical industry, mining, water conservancy, hydropower, highway, railway, national defense, construction, and other engineering hole forming operations.

  Working principle: High-pressure air enters the inside of the DTH hammer through the intake valve of the DTH drilling rig and the inner hole of the drill pipe. It is divided into two ways through the air distribution valve, one way enters the bottom of the hole through the center hole of the valve seat and piston and the exhaust hole of the DTH drill bit to discharge the rock slag at the bottom of the hole, and the other way is distributed to the cylinder to make it reciprocate to realize the impact work.

  DTH hammer performance characteristics

  1. The single impact energy is high, and the energy consumption for breaking rocks is low.

  2. The weight ratio of the piston and the drill bit is close, and effective for a long time. It is beneficial to improve the rock crushing efficiency and prolong the life of the drilling tools.

  3. The central exhaust has a good slag discharge effect and reduces the repeated crushing of rock.

  4. It has a simple and reliable internal structure that is easy to assemble and disassemble, with few failures and easy maintenance.

  5. The hammer has a check valve device to drill holes in the water.

  6. It is always at the front end of the hole when working, and the transmission of the impact energy is not affected by the drilling depth.

  Product parameters

  Drilling diameter of low pressure DTH hammer: φ65~φ250.

  Drilling diameter of medium and high pressure DTH hammer: φ90~φ508.

  The drilling diameter above φ508 is customized, and the maximum diameter of DTH hammer and drill bit is φ1200.

  Product Specifications

  Low pressure DTH hammer

  Specification	Drilling diameter	Length	Outer diameter	Weight	Working pressure	Air consumption	Connection with drill pipe	Connection thread
  	mm	mm	mm	kg	Mpa	m³/min
  KQC65	φ65~φ70	745	φ61.2	13	0.5~0.7	2.5	M42X10X1.5P	φ37-4
  KQC70	φ72~φ74	803	φ67.2	14	0.5~0.7	3	M48X10X2P	φ43-6
  KQC76	φ74~φ76	766	φ67.2	15	0.5~0.7	3	M48X10X2P	φ44-4
  KQC80	φ80~φ82	796	φ72	17	0.5~0.7	5	API 2 3/8 Reg P	φ50-6
  KQC90A	φ90~φ130	796	φ80.2	20	0.5~0.7	5.5	M48X10X2P	φ54-6
  KQC110A	φ110~φ150	838	φ98	30	0.5~0.7	11	API 2 3/8 Reg B	φ65-6
  KQC150	φ150~φ220	908	φ137	75	0.5~0.7	17	M76X10X3B	φ90-6
  KQC170	φ175~φ250	1023	φ156	90	0.5~0.7	19.5	M100X28X10P	φ98-6

   

  Medium and high pressure DTH hammer

  Specification	Drilling diameter	Length	Outer diameter	Weight	Working pressure	Air consumption	Connection with drill pipe	Connection thread
  	mm	mm	mm	kg	Mpa	m³/min
  KQCZ90	φ90~φ120	870	φ80.5	25	0.8~1.2	6	API 2 3/8 Reg P	φ54-6
  KQCZ110	φ110~φ150	917	φ98	36	0.8~1.2	11	API 2 3/8 Reg B	φ65-6
  KQCG80	φ80~φ85	867	φ71	19	0.8~2.1	3-12	DZ50B	φ47-6
  KQCG90	φ90~φ100	908	φ81	21.8	0.8~2.1	4.3-14.2	API 2 3/8 Reg P	φ53-8
  KQCG105	φ105~φ130	1052	φ92	38	0.8~2.1	3.5-18	API 2 3/8 Reg B	φ64-8
  KQCG110	φ110~φ130	1034	φ98	39	0.8~2.1	3.5-15	API 2 3/8 Reg P	φ64-8
  KQCG110A	φ110~φ130	994	φ98	40	1.0~2.1	3.5-15	API 2 3/8 Reg P	φ64-8
  KQCG115	φ115~φ130	998	φ98	40	0.8~2.1	3-12	API 2 3/8 Reg P	φ67-12
  KQCG130	φ130~φ152	1387	φ114	69	0.8~2.1	5.7-18	API 3 1/2 Reg P	φ84-8
  KQCG130A	φ130~φ152	1067	φ118	60	0.8~2.1	3-14	API 2 3/8 Reg P	φ83-12
  KQCG140	φ140~φ152	1098	φ124	74	1.0~2.1	4.5-18	API 3 1/2 Reg P	φ84-8
  KQCG140A	φ140~φ152	1220	φ124	74	0.8~2.1	46.5-18	API 3 1/2 Reg P	φ84-8
  KQCG150	φ152~φ305	1450	φ136	126	1.0~2.1	8.5-25	API 3 1/2 Reg P	φ99.5-8
  KQCG165	φ165~φ305	1372	φ152	92	1.0~2.1	9-26	API 3 1/2 Reg P	φ99.5-8
  KQCG165A	φ165~φ203	1076	φ146	92	0.8~2.1	6.8-20	API 3 1/2 Reg P	φ104.4-12
  KQCG200	φ203~φ350	1551	φ181	208	1.0~2.1	12-31	API 4 1/2 Reg P	φ128-10
  KQCG200A	φ203~φ350	1551	φ186	228	1.0~2.1	12-35	API 4 1/2 Reg P	φ128-10
  KQCG200B	φ203~φ254	1450	φ181	260	0.8~2.1	9.6-25	API 4 1/2 Reg P	φ128-12
  KQCG200C	φ203~φ350	1551	φ181	228	1.0~2.1	12-31	API 4 1/2 Reg P	φ128-10
  KQCG310	φ311~φ508	2110	φ275	670	1.0~2.4	30-78	API 7 5/8 Reg P	φ210-12

   

  For more product specifications, Please email us at info.k@kellegco.com or leave us a message, Kelleg will provide you with professional and prompt reply.

  Instructions for DTH hammer

  1. When the DTH hammer starts drilling, the minimum impact and propulsion force should be used to make the hammer stand against the ground, and open the impact air valve to make the DTH hammer impact work, at this time the hammer does not rotate, DTH drill bit smoothly drill into the rock, and then gradually increase the impact and propulsion force.

  2. The thread of the hammer is right-hand. When the rock drilling tools are in the hole, the hammer should always keep the right rotation. Reverse rotation is strictly forbidden to avoid accidents of hammer and drill bit falling into the well.

  3. During drilling, keep the hole free of rock slag, and if necessary, carry out strong blowing to clear the hole.

  4. When replacing the pressure line and connecting drill pipe, clean the dirt in the pressure and keep the joint of the drill pipe clean to prevent the rock slag and dust from entering the DTH hammer.

  5. Reasonable lubrication is the key to ensuring long service life and high efficiency of the hammer, or else it will accelerate the wear of the hammer.

  6. During drilling, the dust brought by high pressure gas, the pollution of the lubricating oil, dust and mud enter the impactor. It not only reduces the performance of the hammer but also damages the contact surface of each moving part. Therefore, regular maintenance can ensure the continuous and reliable work of the impactor and extend the service life.

  DTH hammer

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