Welded auger stem applied to drill hole with diameter of 89-300

Abstract

The utility model relates to a welding spiral drill rod applied to a drill hole with the diameter of 89-300, which belongs to the technical field of drill rod manufacturing and comprises a drill rod, one end of the drill rod is connected with a drill rod welding head, a spiral piece is arranged on the surface of the drill rod, and the second end of the drill rod is connected with a drill rod head group. The alloy head is additionally arranged on the drill bit to increase the strength, so that the drilling speed is increased, and high-hardness soil is dealt with.

Description

Technical Field

[0001] The utility model relates to a welded spiral drill rod used for drilling holes with a diameter of 89-300, and belongs to the technical field of drill rod manufacturing. Background Art

[0002] In the manufacturing process of spiral drill pipe, welding technology plays a vital role; welding quality directly affects the overall performance of the drill pipe, such as strength, wear resistance, corrosion resistance, etc. For spiral drill pipe, welding not only involves the connection between the drill pipe body and the spiral wings, but may also include the welding of key parts such as drill pipe joints and transition zones, and the welding of alloy points on the top of the spiral drill pipe.

[0003] According to the Chinese invention patent CN105484680A, a combined drill rod for spiral external drilling rigs includes a rod body, which is composed of a spline shaft, a drill bit and a stud. The drill bit and the stud are respectively formed at the upper and lower ends of the spline shaft. The spline shaft is plugged with a number of spiral components, which are composed of a spline sleeve and a spiral piece of a single pitch welded and fixed to the spline sleeve. The ends of the spiral pieces of adjacent spiral components are abutted together and fixed together by clips and rivets. The top of the spline shaft is plugged with a spacer sleeve, and the upper and lower ends of the spacer sleeve are respectively pressed against the upper end surface of the spline sleeve of the spiral component and the fastening nut. The fastening nut is screwed on the stud, and the top of the stud is screwed with an external drilling rig connector. It uses a combined spiral drill rod, which is composed of a rod body and a spiral component. When part of the spiral pieces on the spiral drill rod is damaged, only the corresponding spiral component needs to be replaced, so there is no need to replace the entire spiral drill rod, saving production costs.

[0004] The drill bits of traditional equipment have poor excavation effect on hard soil, and the drill bits are prone to cracking when excavating hard soil. Utility Model Content

[0005] The technical problem to be solved by the utility model is: to increase the strength of the drill bit by adding an alloy head, so as to increase the drilling speed, thereby coping with soil with high hardness.

[0006] The utility model discloses a welded spiral drill rod for drilling holes with a diameter of 89-300, comprising a drill rod, a first end of which is connected to a drill rod welding head, a spiral sheet is arranged on the surface of the drill rod, and a second end of the drill rod is connected to a drill rod head assembly.

[0007] Furthermore, the first end of the drill rod welding head is a polished rod, and the first end of the drill rod welding head and the drill rod are friction welded;

[0008] The drill rod head assembly comprises at least three drill rod head cone pieces, and the bottom of the spiral piece is welded to the top edge of a drill rod head cone piece.

[0009] Furthermore, the second end of the drill pipe welding head is provided with a tapered external thread.

[0010] Furthermore, a plurality of alloy heads are evenly distributed on the surface of the drill rod head cone piece, the end of the drill rod head cone piece is conical, and the alloy heads are located on the cone side of the drill rod head cone piece;

[0011] The outer side of the cone plate of the drill pipe head coincides with the edge of the spiral plate;

[0012] The positions of the alloy heads on the cone pieces of two adjacent drill pipe heads are staggered.

[0013] Furthermore, the cone edge angle of the drill rod head cone piece ranges from thirty degrees to forty degrees.

[0014] Furthermore, a blowing chamber I is provided in the middle of the drill pipe welding head, a blowing chamber II is provided in the drill pipe, and the blowing chamber I is connected with the blowing chamber II;

[0015] The output end of the blowing chamber II is divided into a plurality of blowing ports by the drill rod head cone.

[0016] Furthermore, a tightening section I and a tightening section II are provided in the middle of the tapered external thread.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] The utility model discloses a welded spiral drill rod for drilling holes with a diameter of 89-300. The drill rod is used to connect a drill rod welding head, a spiral piece and a drill rod head assembly. The drill rod welding head is used to connect an external drilling rig. The spiral piece is used to carry out spiral transportation and lifting of soil particles, gravel or sand and stone produced after drilling holes in soil and rock formations. The drill rod head assembly is used to cut harder soil and rock formations. An alloy head is added to the drill bit to increase the strength, so as to increase the drilling speed, thereby coping with soil with high hardness. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0020] In the figure: 1. Drill rod; 2. Drill rod welding head; 3. Spiral sheet; 4. Drill rod head assembly;

[0021] 11. Blowing chamber II; 12. Blowing port;

[0022] 21. Tightening section I; 22. Tightening section II; 23. Conical external thread; 24. Blowing chamber I;

[0023] 41. Drill pipe head cone; 42. Alloy head. DETAILED DESCRIPTION

[0024] Example 1

[0025] like Figure 1As shown, the utility model describes a welded spiral drill rod for drilling holes with a diameter of 89-300, comprising a drill rod 1, a first end of the drill rod 1 connected to a drill rod welding head 2, a spiral sheet 3 is provided on the surface of the drill rod 1, and a second end of the drill rod 1 is connected to a drill rod head assembly 4.

[0026] The drill rod 1 is used to connect the drill rod welding head 2, the spiral piece 3 and the drill rod head group 4. The drill rod welding head 2 is used to connect to an external drilling rig. The spiral piece 3 is used to spirally transport and lift soil particles, gravel or sand and stone produced after drilling holes in soil and rock formations. The drill rod head group 4 is used to cut harder soil and rock formations.

[0027] like Figure 1 As shown, the first end of the drill rod welding head 2 is a polished rod, and the first end of the drill rod welding head 2 is friction welded with the drill rod 1;

[0028] The drill head assembly 4 comprises at least three drill head cones 41 , the bottom of the spiral sheet 3 is welded to the top edge of a drill head cone 41 , and the second end of the drill welding head 2 is provided with a tapered external thread 23 .

[0029] By means of friction welding technology, the various parts of the drill pipe 1 can be firmly connected together to form a whole, thereby improving the connection strength between the drill pipe 1 and the drill pipe welding head 2. This welding method can ensure that when the drill pipe 1 is subjected to various complex stresses, the welding point between the drill pipe 1 and the drill pipe welding head 2 is not prone to breakage or damage;

[0030] The polished rod section is used to contact the external sealing structure, so that the drill rod 1 has good sealing performance and avoids the overflow of materials during use.

[0031] like Figure 1 As shown, the second end of the drill pipe welding head 2 is provided with a tapered external thread 23 .

[0032] The tapered external thread 23 is connected to the external drill rig via threads, which facilitates the disassembly and installation of the drill rod welding head 2 .

[0033] As an optimization, the drill head group 4 includes three drill head cones 41, and the bottom of the spiral piece 3 is welded to the top edge of a drill head cone 41 to ensure that the material drilled out of the drill head group 4 smoothly enters the spiral piece 3 section, thereby spirally lifting the material.

[0034] like Figure 1 As shown, a plurality of alloy heads 42 are evenly distributed on the surface of the drill rod head cone piece 41, the end of the drill rod head cone piece 41 is conical, and the alloy heads 42 are located on the conical side of the drill rod head cone piece 41;

[0035] The outer side of the drill head cone 41 coincides with the edge of the spiral piece 3;

[0036] The positions of the alloy heads 42 on two adjacent drill rod head cones 41 are staggered.

[0037] The material of the alloy head 42 enables it to maintain sharpness for a long time during the cutting process, reducing the reduction in cutting efficiency due to wear, thereby extending the service life; the tapered drill head cone 41 provides a gradually expanding drilling change, and the tapered design enables the drill head cone 41 to be positioned more accurately during drilling, reducing the drilling error caused by offset;

[0038] The outer edge of the overlapping drill head cone 41 and the edge of the spiral piece 3 make the drill hole after drilling coincide with the edge of the spiral piece 3, thereby cooperating with the spiral piece 3 to improve the efficiency of material transportation after drilling and avoid material slippage caused by excessive gaps;

[0039] The positions of the alloy heads 42 on two adjacent drill rod head cones 41 are staggered, and the coverage area of ​​the alloy heads 42 is increased after rotation, thereby indirectly improving the drilling efficiency.

[0040] like Figure 1 As shown, the cone edge angle of the drill rod head cone 41 ranges from thirty degrees to forty degrees.

[0041] As an optimization, the cone edge angle of the drill rod head cone 41 can be thirty degrees, thirty-five degrees or forty degrees.

[0042] like Figure 1 As shown, a blowing chamber I 24 is provided in the middle of the drill pipe welding head 2, and a blowing chamber II 11 is provided in the drill pipe 1, and the blowing chamber I 24 is connected with the blowing chamber II 11;

[0043] The output end of the blowing chamber II 11 is divided into a plurality of blowing ports 12 by a drill rod head cone 41 .

[0044] The wind blowing into the borehole passes through the blowing chamber I 24 and the blowing chamber II 11, and is finally discharged through the blowing port 12, so as to supply wind into the borehole, and then the generated sand and gravel enter the spiral blade 3, and the rotating spiral blade 3 drives the sand and gravel to be lifted to a higher level.

[0045] like Figure 1 As shown, a tightening section I 21 and a tightening section II 22 are provided in the middle of the tapered external thread 23 .

[0046] The tightening section I 21 and the tightening section II 22 are used to provide a position for fixing an external clamp, thereby facilitating the connection of the drill pipe welding head 2 to an external drilling rig.

[0047] Working process or working principle:

[0048] A friction welding machine is used to perform friction welding on the drill rod 1 and the drill rod welding head 2. After welding, the spiral sheet 3 is welded on the surface of the drill rod 1, and the drill rod head cone sheet 41 is welded at equal intervals on the end of the drill rod 1 to ensure that the drill rod head cone sheet 41 after welding separates the blowing chamber II 11 into a plurality of blowing ports 12. A plurality of alloy heads 42 are welded on the edge of the cone portion of the drill rod head cone sheet 41. After the overall welding is completed, the drill rod 1 is connected to the external drilling rig through the tapered external thread 23.

[0049] The description of the direction and relative position relationship of the structure in the present invention, such as the description of front, back, left, right, up, and down, does not constitute a limitation of the present invention, but is only for the convenience of description.

Claims

1. A welded spiral drill rod for drilling holes with a diameter of 89-300, characterized in that: The drill rod (1) comprises a drill rod (1), wherein the first end of the drill rod (1) is connected to a drill rod welding head (2), a spiral sheet (3) is provided on the surface of the drill rod (1), and the second end of the drill rod (1) is connected to a drill rod head assembly (4).

2. The welded spiral drill rod for drilling holes with a diameter of 89-300 according to claim 1, characterized in that: The first end of the drill rod welding head (2) is a polished rod, and the first end of the drill rod welding head (2) and the drill rod (1) are friction welded; The drill rod head assembly (4) comprises at least three drill rod head cone pieces (41), and the bottom of the spiral piece (3) is welded to the top edge of a drill rod head cone piece (41).

3. The welded spiral drill rod for drilling holes with a diameter of 89-300 according to claim 2, characterized in that: The second end of the drill pipe welding head (2) is provided with a tapered external thread (23).

4. The welded spiral drill rod for drilling holes with a diameter of 89-300 according to any one of claims 2 or 3, characterized in that: A plurality of alloy heads (42) are evenly distributed on the surface of the drill rod head cone piece (41); the end of the drill rod head cone piece (41) is cone-shaped, and the alloy heads (42) are located on the cone side of the drill rod head cone piece (41); The outer side of the drill rod head cone (41) coincides with the edge of the spiral piece (3); The alloy heads (42) on two adjacent drill rod head cone pieces (41) are positioned in an alternating manner.

5. The welded spiral drill rod for drilling holes with a diameter of 89-300 according to claim 4, characterized in that: The cone edge angle of the drill rod head cone (41) ranges from thirty degrees to forty degrees.

6. The welded spiral drill rod for drilling holes with a diameter of 89-300 according to claim 5, characterized in that: A blowing chamber I (24) is provided in the middle of the drill rod welding head (2), and a blowing chamber II (11) is provided in the drill rod (1), and the blowing chamber I (24) is communicated with the blowing chamber II (11); The output end of the blowing chamber II (11) is divided into a plurality of blowing ports (12) by a drill rod head cone (41).

7. The welded spiral drill rod for drilling holes with a diameter of 89-300 according to claim 6, characterized in that: A tightening section I (21) and a tightening section II (22) are provided in the middle of the tapered external thread (23).

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