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Multifunctional down-the-hole drill bit

A multi-functional, down-the-hole technology, applied in the direction of drill bits, drilling equipment, earthwork drilling, etc., can solve the problems of slow impact drilling speed of down-the-hole hammer, unsuitable for silty soil, affecting construction progress, etc., and achieves a wide range of applications , Enhanced drilling ability and smooth drilling process

Pending Publication Date: 2022-03-11
河南省远基岩土工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hammer head of the down-the-hole hammer is generally cylindrical, and the end face of the hammer head is usually convex, flat, concave, and deep-concave. Low efficiency and therefore unsuitable for silty soil operations
[0003] However, drilling operations will actually face more complex geological conditions, such as for areas where silty soil and hard soil alternate, or areas where silty soil and rock alternate, simple rotary drilling (conical drill bit) or percussion Drilling (flat drill bit) will cause low work efficiency due to their own disadvantages, so it is necessary to replace the applicable drilling rig according to the formation
Changing drilling rigs back and forth affects the construction progress and is time-consuming and labor-intensive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] like Figure 1 to Figure 7 As shown, the present embodiment provides a multifunctional down-the-hole drill bit. The down-the-hole drill bit includes a drill rod 1 and a hammer head arranged at the front of the drill rod 1, wherein the hammer head includes a fixed base 2 with a circular top surface and a conical wing structure arranged on the top of the fixed base 2, The width of the bottom edge of the fin structure is 1-1.5 times the width of the top surface of the fixed base. The fin structure includes at least two fins 3 connected to each other. The angles between the fins 3 are equal to each other. The gap between the pieces 3 forms the first flute 4, and the shape of each wing 3 is a right triangle. The top surface of the fixed base 2 and the top of the wings 3 are respectively provided with button teeth 5, and are located on the fixed base 2. Each button 5 at the edge of the top surface partially protrudes from the fixed base 2 .

[0034] By adopting the above te...

Embodiment 2

[0036] On the basis of Example 1, the fin structure is further optimized. In this embodiment, the width of the bottom of the fin structure is preferably 1-1.2 times the width of the top surface of the fixed base 2 . More preferably, the width of the bottom edge of the fin structure is consistent with the width of the top surface of the fixed base 2, so that the transition between the fin structure and the fixed base 2 is smooth, so as to disperse the force and prevent the fin structure from being excessively stressed. The taper of the vane structure is 1:1-1:1.1, if the taper is greater than 1:1.1, the drilling resistance of the DTH bit in the silty soil layer will increase, which will reduce the drilling efficiency; if the taper is less than 1: 1, the width of the hammer head is not enough, which affects the hammer breaking ability of the hard soil layer.

Embodiment 3

[0038] In the present invention, the fin structure includes at least two interconnected fins 3 , for example, two, three, four, five and so on. Preferably, as figure 1 and 2 As shown, the fin structure includes three interconnected fins 3, the angle between the three fins is 120°, and the three fins 3 support each other to form a stable structure.

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Abstract

The invention discloses a multifunctional down-the-hole drill bit, relates to the technical field of geotechnical engineering mechanical equipment, solves the technical problem that the same down-the-hole drill bit in the prior art cannot adapt to two working stratums of silty soil and hard soil or silty soil and rock, and comprises a drill rod and a hammer head arranged at the front part of the drill rod, the hammer head comprises a fixed base and a conical fin structure, the top face of the fixed base is round, the width of the bottom edge of the fin structure is 1-1.5 times of the width of the top face of the fixed base, the fin structure comprises at least two fins which are connected with each other, the included angles between the fins are equal, each fin is in a right triangle shape, and the included angles between the fins are equal to the included angles between the fins. Spherical teeth are respectively arranged on the top surface of the fixed base and the tops of the fins, and each spherical tooth part located at the edge of the top surface of the fixed base protrudes out of the fixed base; the multifunctional down-the-hole drill bit is diversified in function, wide in application range, capable of coping with two working stratums, free of replacement of a drilling machine and high in working efficiency.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering machinery and equipment, and more specifically relates to the technical field of down-the-hole drill bits. Background technique [0002] Drilling and forming holes in geotechnical engineering often choose different mechanical equipment according to different strata. For example, in silty soil areas with low hardness, ordinary rotary drilling rigs are used for rotary drilling, which has high work efficiency and convenient slag discharge. However, the disadvantages of ordinary rotary drilling rigs are insufficient power and poor ability to enter hard soil, so they are not suitable for hard soil areas. Therefore, in hard soil or rocky areas with high hardness, choosing to use the DTH hammer for impact drilling has the advantages of high power and high drilling efficiency in hard soil. However, the hammer head of the down-the-hole hammer is generally cylindrical, and the end face of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/36E21B10/38
CPCE21B10/36E21B10/38
Inventor 任伊兵郭党辉郭红兵郭原英
Owner 河南省远基岩土工程有限公司
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