Mining tail square combined drill rod

Abstract

The utility model relates to the technical field of mining drilling equipment, and discloses a mining tail square combined drill rod which comprises a tail section drill rod, a quick connection drill rod and a top section drill rod which are sequentially connected end to end, the tail section drill rod is detachably connected with the quick connection drill rod, and the quick connection drill rod is detachably connected with the top section drill rod. Through holes are formed in the tail section drill rod, the quick connection drill rod and the top section drill rod in a penetrating mode, and the tail section drill rod comprises a cylindrical section, a tetragonal prism section and a first rod body which are sequentially and fixedly connected end to end. According to the combined drill rod, a detachable connection mode is adopted, flexible assembly and disassembly can be conveniently carried out according to different drilling depth requirements, and the working efficiency is greatly improved. Meanwhile, the threaded connection mode is simple and reliable, connection is tight, and the problem that the drill rod is loosened in the drilling process can be effectively solved. The through hole penetrating through the interior of the drill rod is used for water passing and slag discharging, the drill bit can be effectively cooled, the service life of the drill bit is prolonged, and meanwhile the drilling quality is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to mining drilling equipment technical field, concretely is a kind of mining tail four square combination drill rod. BACKGROUND

[0002] In coal mining operation, roadway support is the key link to ensure safety in production, and anchor rod support as a commonly used and effective support method plays a crucial role in maintaining the stability of surrounding rock. Anchor rod support anchors the anchor rod in the surrounding rock of the roadway, utilizes the friction, adhesion and self-lifting force between the anchor rod and the surrounding rock to transfer the load of the surrounding rock to the stable rock mass, thereby limiting the deformation and damage of the surrounding rock and ensuring the safety and stability of the roadway.

[0003] The commonly used round tail drill rod has limited contact area and is prone to slipping when cooperating with the drill chuck. Under the complex geological conditions in coal mine, the drilling operation requires the drill rod to transmit a large torque to overcome the rock resistance, and the round tail drill rod cannot meet this demand, resulting in low torque transmission efficiency and slow drilling progress. Although some non-circular tail drill rods improve the torque transmission problem to some extent, they have deficiencies in adaptability with different types of drill chucks and cannot be widely applied to various drilling equipment. SUMMARY

[0004] To solve the above problems, the utility model adopts the following technical solutions.

[0005] A mining tail four square combination drill rod, comprising tail section drill rods, quick-connect drill rods and top section drill rods connected end to end, the tail section drill rods and quick-connect drill rods are detachably connected, the quick-connect drill rods and top section drill rods are detachably connected, through holes are provided in the tail section drill rods, quick-connect drill rods and top section drill rods, the tail section drill rod comprises cylindrical segments, four square cylindrical segments and rod body one fixedly connected end to end.

[0006] As a preferred, the tail section drill rod and the quick-connect drill rod are threadedly connected.

[0007] As a preferred, the quick-connect drill rod comprises butt joint segments and rod body two fixedly connected end to end, the butt joint segment is provided with butt joint hole one at the end of the outward end, the inner wall of the butt joint hole one is provided with internal thread, the other end of the rod body one is provided with screw rod segment one, and the screw rod segment one is threadedly connected with the butt joint hole one.

[0008] As a preferred, the quick-connect drill rod and the top section drill rod are threadedly connected.

[0009] As preferred, the other end of the rod body two is provided with a screw rod segment two, the top joint drill rod comprises a rod body three, the two ends of the rod body three are respectively provided with a butt joint hole two and a butt joint hole three, the butt joint hole two and the butt joint hole three are internally provided with internal threads, the butt joint hole two is threadedly connected with the screw rod segment two, and the butt joint hole three is used for being threadedly connected with a drill bit.

[0010] As preferred, the outer wall of the rod body three is further provided with symmetrical and parallel arranged planar portions.

[0011] As preferred, the tail joint drill rod, the quick joint drill rod and the top joint drill rod are all made of high-strength alloy steel.

[0012] As preferred, the cross sections of the rod body one and the rod body two are both hexagonal structures.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] The combined drill rod adopts a detachable connection mode, is convenient to flexibly assemble and detach according to different drilling depth requirements, and greatly improves operation efficiency. Meanwhile, the threaded connection mode is simple and reliable, is closely connected, and can effectively avoid the problem that the drill rod is loose in the drilling process. The through hole penetrating through the inside of the drill rod is used for water passing and residue discharging, can effectively cool the drill bit, prolongs the service life of the drill bit, and improves drilling quality. The drill rod is made of high-strength alloy steel, the strength, hardness and wear resistance of the drill rod are enhanced, the service life of the drill rod is effectively prolonged, and production cost is reduced. The planar portion of the outer wall of the top joint drill rod is designed, operation is facilitated, and the convenience of installation and detachment is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is an overall structure schematic view of the utility model;

[0016] Fig. 2 It is an axis structure schematic view of the utility model.

[0017] In the drawing:

[0018] 1, tail joint drill rod; 11, cylindrical segment; 12, square column segment; 13, rod body one; 131, screw rod segment one; 2, quick joint drill rod; 21, butt joint segment; 211, butt joint hole one; 22, rod body two; 221, screw rod segment two; 3, top joint drill rod; 31, rod body three; 311, butt joint hole two; 312, butt joint hole three; 313, planar portion; 4, through hole; 5, drill bit. PREFERRED EMBODIMENT

[0019] Clearly and completely describe the technical scheme in the embodiments of the utility model in combination with the drawings in the embodiments of the utility model; Obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments, based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without making creative labor belong to the range of protection of the utility model.

[0020] In the description of the utility model, it needs to be explained that the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, and not indicating or implying that the indicated device or element must have a particular orientation, a particular orientation and operation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0021] In the description of the utility model, it needs to be explained that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "sleeved / connected", "connected" and the like should be broadly understood, for example, "connected", which can be fixedly connected, or can be detachably connected, or integrally connected; It can be mechanical connection, or electrical connection; It can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For the ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances. Embodiment

[0022] As Figs. 1-2 shown, the utility model provides a kind of mine tail four square combination drill rod, including sequentially head-to-tail connection tail section drill rod 1, quick-connect drill rod 2 and top section drill rod 3.There is detachable connection between tail section drill rod 1 and quick-connect drill rod 2, between quick-connect drill rod 2 and top section drill rod 3, which is convenient to assemble and disassemble according to actual demand in use process.

[0023] In this embodiment, through holes 4 are provided in tail section drill rod 1, quick-connect drill rod 2 and top section drill rod 3, which are used for water transmission. In the drilling process, water can be transported to the bottom of the drill hole through the through holes 4, which plays a role in cooling the drill bit 5 and discharging drill cuttings, and is beneficial to improve the drilling efficiency and quality.

[0024] In this embodiment, tail section drill rod 1 includes cylindrical segment 11, four square column segment 12 and rod body one 13, which are fixedly connected in sequence. The design of four square column segment 12 can better cooperate with the chuck of the drilling machine. Compared with the traditional circular tail, four square column segment 12 is more stable when transmitting torque, effectively avoiding the phenomenon of slipping, and improving the stability and efficiency of drilling operation.

[0025] In the embodiment, the tail section drill rod 1 and the quick connection drill rod 2 are connected by threads. Specifically, the quick connection drill rod 2 includes a butt joint section 21 and a rod body 22 fixedly connected at two ends, the butt joint section 21 is provided with a butt joint hole 211 at an outer end, and the inner wall of the butt joint hole 211 is provided with internal threads; the other end of the rod body 13 is provided with a screw rod section 131, and the screw rod section 131 is connected with the butt joint hole 211 by threads. This thread connection method is simple and reliable, and the connection is tight, which can ensure that the drill rods will not be loose during drilling.

[0026] In the embodiment, the quick connection drill rod 2 and the top section drill rod 3 are also connected by threads. The other end of the rod body 22 is provided with a screw rod section 221, and the top section drill rod 3 includes a rod body 31, the two ends of the rod body 31 are respectively provided with butt joint holes 311 and 312, the internal threads are arranged in the butt joint holes 311 and 312, the butt joint hole 311 is connected with the screw rod section 221 by threads, and the butt joint hole 312 is used for thread connection with the drill bit 5. Through this thread connection method, the connection and disassembly of the top section drill rod 3, the drill bit 5 and the quick connection drill rod 2 are facilitated.

[0027] In the embodiment, the outer wall of the rod body 31 is also provided with symmetrical and parallel flat surfaces 313. The design of the flat surfaces 313 facilitates the use of tools during the installation and disassembly of the top section drill rod 3, and increases the convenience and stability of the operation.

[0028] In the embodiment, the tail section drill rod 1, the quick connection drill rod 2 and the top section drill rod 3 are all made of 55SiMnMo high-strength alloy steel. The high-strength alloy steel has high strength, hardness and wear resistance, which can effectively resist the pressure, torque and wear during drilling, prolong the service life of the drill rod and reduce the use cost.

[0029] The cross sections of the rod body 13 and the rod body 22 are hexagonal structures.

[0030] The working principle of the above technical scheme is as follows:

[0031] Before the coal mine anchor rod supporting drilling operation is performed, the quick connection drill rod 2 with a suitable size can be selected according to the required drilling depth. The screw rod section 131 of the tail section drill rod 1 is aligned with the butt joint hole 211 of the butt joint section 21 of the quick connection drill rod 2, and the screw rod section 131 is screwed into the butt joint hole 211 by rotating until the connection is tight. Then, the screw rod section 221 of the rod body 22 of the quick connection drill rod 2 is aligned with the butt joint hole 311 of the rod body 31 of the top section drill rod 3, and the screw rod section 221 is connected with the butt joint hole 311 by rotating until the thread connection is tight. Finally, the drill bit is connected with the butt joint hole 312 of the top section drill rod 3 by threads, and the assembly of the combined drill rod is completed.

[0032] In use, the assembled combination drill rod is installed on a drilling machine, and the square column section 12 of the tail section drill rod 1 is tightly matched with a chuck of the drilling machine. The drilling machine is started, and water is supplied to a borehole through the through hole 4 in the drill rod. In the drilling process, the drilling machine drives the drill rod to rotate, the drill bit breaks rocks, and drill cuttings generated are discharged out of the hole through the water flow. Since the square column section 12 of the tail section drill rod 1 is tightly matched with the chuck of the drilling machine, the drill rod can stably transmit torque and efficiently complete the drilling operation.

[0033] The above merely describes a preferred specific embodiment of the present application; however, the protection scope of the present application is not limited to this. Any skilled person in the art, according to the technical scheme and improvement concept of the present application, can make equivalent replacement or change within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A mine tail section square combination drill rod characterized by: The utility model provides a drill rod, including the tail section drill rod (1) that links up in turn, quick -joint drill rod (2) and top section drill rod (3), detachable connection between the tail section drill rod (1) and quick -joint drill rod (2), detachable connection between quick -joint drill rod (2) and top section drill rod (3), the through -hole (4) of being set up in tail section drill rod (1), quick -joint drill rod (2) and top section drill rod (3) all is set up, the tail section drill rod (1) includes the cylindrical section (11) that links up in turn fixedly connected, square column section (12) and rod body one (13).

2. A mine tail four square combination drill rod as claimed in claim 1, characterized in that: The tail section drill rod (1) is connected with the quick -joint drill rod (2) by screw thread.

3. A mine tail four square combination drill rod as claimed in claim 2, characterized in that: The quick -joint drill rod (2) includes butt joint section (21) and rod body two (22) fixedly connected in turn, and the outer end of butt joint section (21) is provided with butt joint hole one (211), and the inner wall of butt joint hole one (211) is provided with internal thread, and the other end of rod body one (13) is provided with screw rod section one (131), and screw rod section one (131) is connected with butt joint hole one (211) by screw thread.

4. A mine tail four square combination drill rod as claimed in claim 3, characterized in that: The quick -joint drill rod (2) is connected with the top section drill rod (3) by screw thread.

5. A mine tail four square combination drill rod as claimed in claim 4, characterized in that: The other end of rod body two (22) is provided with screw rod section two (221), and the top section drill rod (3) includes rod body three (31), and the both ends of rod body three (31) are provided with butt joint hole two (311) and butt joint hole three (312) respectively, and the inner part of butt joint hole two (311) and butt joint hole three (312) is provided with internal thread, and butt joint hole two (311) is connected with screw rod section two (221) by screw thread, and butt joint hole three (312) is used for being connected with drill bit by screw thread.

6. A mine tail four square combination drill rod as claimed in claim 5, characterized in that: The outer wall of rod body three (31) is further provided with symmetrical and parallel plane part (313).

7. The mine tail four square combination drill rod as claimed in claim 1, characterized in that: The tail section drill rod (1), quick -joint drill rod (2) and top section drill rod (3) are made of high -strength alloy steel.

8. A mine tail four square combination drill rod as claimed in claim 7, characterized in that: The section of rod body one (13) and rod body two (22) is hexagonal structure.

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