阅读说明：本技术 矿用钻探的钻杆 (Drill rod for mining drilling ) 是由 武国胜 胡金星 李伟伟 刘亚晓 于 2021-02-08 设计创作，主要内容包括：本发明涉及矿用钻探用钻具技术领域,具体提供一种矿用钻探的钻杆,包括：钻杆壳体(1)、内顶杆(2)、支承结构(3)和限位结构(4),所述钻杆壳体(1)具有贯穿其内部的腔体,所述支承结构(3)支承在所述腔体中,并且所述支承结构(3)具有中心通孔,所述限位结构(4)设置在所述内顶杆(2)上,所述内顶杆(2)穿过所述支承结构(3)的中心通孔,在所述限位结构限定的移动范围内可往复移动地支承在所述腔体中。根据本发明的方案,通过在钻杆内部设置可前后滑动的内顶杆,利用内顶杆的前后滑动启动钻具最前端的转换装置,消除钻进长度对转换装置转换的影响；同时也可通过内顶杆的移动距离判定转换装置是否已完成转换。(The invention relates to the technical field of drilling tools for mining drilling, and particularly provides a drill rod for mining drilling, which comprises: the drill rod comprises a drill rod shell (1), an inner ejector rod (2), a supporting structure (3) and a limiting structure (4), wherein the drill rod shell (1) is provided with a cavity penetrating through the inner portion of the drill rod shell, the supporting structure (3) is supported in the cavity, the supporting structure (3) is provided with a central through hole, the limiting structure (4) is arranged on the inner ejector rod (2), the inner ejector rod (2) penetrates through the central through hole of the supporting structure (3), and the limiting structure is supported in the cavity in a reciprocating mode within a movement range limited by the limiting structure. According to the scheme of the invention, the inner ejector rod capable of sliding back and forth is arranged in the drill rod, and the conversion device at the foremost end of the drilling tool is started by the back and forth sliding of the inner ejector rod, so that the influence of the drilling length on the conversion of the conversion device is eliminated; meanwhile, whether the conversion device has completed conversion or not can be judged through the moving distance of the inner mandril.)

1. Drill rod for mining drilling, characterized in that it comprises: the drill rod casing (1) is provided with a cavity (101) penetrating through the interior of the drill rod casing, the supporting structure (3) is supported in the cavity (101), the supporting structure (3) is provided with a central through hole, the limiting structure (4) is arranged on the inner ejector rod (2), the inner ejector rod (2) penetrates through the central through hole of the supporting structure (3), and the limiting structure (4) is supported in the cavity (101) in a reciprocating mode within a movement range limited by the limiting structure (4).

2. Drill rod for mining drilling according to claim 1, characterized in that the limit structures (4) are located on both sides of the support structure (3) defining the range of movement of the inner ram (2).

3. Drill rod for mining drilling according to claim 2, characterized in that the support structure (3) consists of at least two support blocks (301), which support blocks (301) are fixedly connected with the inner wall of the cavity (101) of the drill rod housing (1).

4. The drill rod for mining drilling according to claim 3, characterized in that the support block (301) is provided with a central through hole (3011) and arc-shaped waist holes (3012) symmetrically arranged at two sides of the central through hole (3011).

5. Drill rod for mining drilling according to claim 4, characterized in that the stop structure (4) comprises two fixing clips (401) arranged on the inner ram (2) and that the two fixing clips (401) are located outside two bearing blocks (301) near the end of the drill rod housing (1), respectively.

6. Drill rod for mining drilling according to claim 5, characterized in that the stop structure (4) further comprises a stop spring (402), which stop spring (402) is arranged between one of the securing clips (401) and the bearing block (301) immediately adjacent thereto.

7. The drill rod for mining drilling according to claim 6, characterized in that the outer wall of the support block (301) is further provided with a tensioning slot (3013).

8. Drill rod for mining drilling according to claim 7, characterized in that the end of the inner ram (2) remote from the limit spring (402) is connected to a joint (5) for connecting the inner ram (2) in other drill rods.

9. The drill rod for mining drilling according to claim 8, characterized in that an annular collar (6) is provided between the limiting spring (402) and its corresponding retaining clip (401).

Technical Field

The invention relates to the technical field of drilling tools for mining drilling, in particular to a drill rod for mining drilling.

Background

In the drilling construction process, the conventional drill rod can only perform ventilation and water-passing operation by means of an internal channel, and realizes the functions of cooling, deslagging and the like on a front-end drilling tool by means of media such as wind, water, mud and the like; the high-pressure sealing drill rod can utilize high-pressure water to realize the conversion of reaming and hole-making drilling tools with conversion functions at the front end, and when the length of the drill rod is too long, the pressure drop generated after the high-pressure water passes through the drill rod leads the conversion device not to be normally converted or the water supply pressure of the rear-end drilling tool is required to continuously rise so as to ensure the normal conversion of the conversion device, so that the drilling construction becomes difficult, the operation efficiency is low and the energy is wasted.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art and to providing a drill rod for mining drilling.

In order to solve the technical problem, the invention provides a drill rod for mining drilling, which comprises: the drill rod comprises a drill rod shell, an inner ejector rod, a supporting structure and a limiting structure, wherein the drill rod shell is provided with a cavity penetrating through the inner drill rod, the supporting structure is supported in the cavity, the supporting structure is provided with a central through hole, the limiting structure is arranged on the inner ejector rod, the inner ejector rod penetrates through the central through hole of the supporting structure, and the limiting structure is supported in the cavity in a reciprocating mode within a movement range limited by the limiting structure.

According to one aspect of the invention, the limiting structures are positioned on two sides of the supporting structure to limit the moving range of the inner mandril.

According to one aspect of the invention, the support structure consists of at least two support blocks, which are fixedly connected to the inner wall of the cavity of the drill rod housing.

According to one aspect of the invention, the supporting block is provided with a central through hole and arc-shaped waist holes symmetrically arranged on two sides of the central through hole.

According to one aspect of the invention, the limiting structure comprises two fixing clips arranged on the inner mandril, and the two fixing clips are respectively positioned at the outer sides of the two bearing blocks close to the end part of the drill rod shell.

According to one aspect of the invention, the limiting structure further comprises a limiting spring, and the limiting spring is arranged between one of the fixing clips and the supporting block which is adjacent to the fixing clip.

According to one aspect of the invention, the outer wall of the supporting block is also provided with a tensioning groove.

According to one aspect of the invention, one end of the inner ejector rod, which is far away from the limiting spring, is connected with a joint for connecting the inner ejector rod in other drill rods.

According to one aspect of the invention, an annular retainer ring is arranged between the limiting spring and the corresponding fixing clamp.

According to one scheme of the invention, each supporting block is provided with a central through hole and arc-shaped waist holes symmetrically arranged on two sides of the central through hole. So set up, can make the interior ejector pin pass through central through-hole and stably support in the cavity. The arc waist hole can be used for circulating cooling slag-removing media, such as water, wind and the like, required by the front end of the drilling tool. Namely, the drilling tool is cooled and discharged by cooling and discharging medium which is introduced into the drill rod of the invention.

According to one scheme of the invention, the outer wall of the supporting block is also provided with a tensioning groove. The outer diameter of the supporting block has a certain deformation amount through the tensioning groove, and after the supporting block is installed in the cavity, the outer wall of the supporting block and the inner part of the cavity form a large enough friction force by means of elastic deformation of the shape, so that the supporting block is fixed, the installation is convenient, and the structure is stable and firm.

According to one scheme of the invention, the limiting structure comprises two fixing clips arranged on the inner ejector rod, the two fixing clips are respectively positioned on the outer sides of the two supporting blocks close to the left end part and the right end part of the drill rod shell, and the limiting structure is arranged in such a way that the two fixing clips in the limiting structure can limit a moving range, so that the inner ejector rod can freely reciprocate in the moving range when the inner ejector rod is moved.

According to one aspect of the invention, the limiting spring is arranged between one of the fixing clips and the bearing block adjacent to the fixing clip. The arrangement is that when the inner ejector rod is pushed to the left side, the conversion device at the most front end of the drilling tool is started through the sliding of the inner ejector rod, so that the influence of the drilling length on the conversion of the conversion device can be eliminated through the arrangement of a plurality of drill rods.

According to the scheme of the invention, the inner ejector rod capable of sliding back and forth is arranged in the drill rod, and the conversion device at the foremost end of the drilling tool is started by the back and forth sliding of the inner ejector rod, so that the influence of the drilling length on the conversion of the conversion device is eliminated; meanwhile, whether the conversion device has completed conversion or not can be judged through the moving distance of the inner mandril. The technical problem that when the length of a drill rod is too long, the conversion device cannot be normally converted or the normal conversion of the conversion device can be ensured only by requiring the continuous rising of the water supply pressure of a rear-end drilling tool due to the pressure drop generated after high-pressure water passes through the drill rod in the prior art is solved.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.

Figure 1 schematically shows a cross-sectional view of a drill rod for mining drilling according to an embodiment of the invention;

FIG. 2 schematically shows a cross-sectional view of a drill rod with the inner ram and the stop structure removed, according to one embodiment of the present invention;

FIG. 3 schematically illustrates a front view of a support block according to an embodiment of the present invention;

FIG. 4 schematically shows a side view of a support block according to an embodiment of the invention.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the scope of the present invention.

Fig. 1 schematically shows a cross-sectional view of a drill rod for mining drilling according to an embodiment of the invention. As shown in fig. 1, a drill rod for mining drilling according to the invention comprises: the drill rod shell body 1, the inner ejector rod 2, the supporting structure 3 and the limiting structure 4. In the present embodiment, the drill rod housing 1 has a cavity 101 penetrating through the interior thereof, i.e. the drill rod housing 1 has a hollow inner cavity and two ends penetrate. In the present embodiment, the supporting structure 3 is supported in the cavity 101, and the supporting structure 3 has a central through hole, the stopper structure 4 is provided on the inner jack 2, the inner jack 2 passes through the central through hole of the supporting structure 3, and is supported in the cavity 101 so as to be reciprocally movable within a movement range defined by the stopper structure 4.

Figure 2 schematically shows a cross-sectional view of a drill rod with the inner ram and the stop arrangement removed, according to one embodiment of the invention. As shown in fig. 2, the support structure 3 is composed of three support blocks 301 arranged at intervals, and each support block 301 is fixedly connected with the inner wall of the cavity 101 of the drill rod housing 1. Furthermore, fig. 3 schematically shows a front view of a bearing block according to an embodiment of the invention; FIG. 4 schematically shows a side view of a support block according to an embodiment of the invention. As shown in fig. 2 and 3, in the present embodiment, each support block 301 is provided with a central through hole 3011 and arc-shaped waist holes 3012 symmetrically arranged on both sides of the central through hole 3011. So arranged, the inner ram 2 can be stably supported in the cavity 101 through the central through hole 3011. Of course, in the present invention, the number of the support blocks 301 may be set according to the length of the inner ram 2, and the specific number is determined according to the actual situation, and three support blocks in the present embodiment are merely exemplified. Moreover, the arc-shaped waist holes 3012 can be used to circulate cooling and slag-removing media, such as water and wind, needed by the front end of the drilling tool. Namely, the drilling tool is cooled and discharged by cooling and discharging medium which is introduced into the drill rod of the invention.

Further, as shown in fig. 4, a tensioning groove 3013 is further provided on the outer wall of the supporting block 301. The outer diameter of the supporting block 301 has a certain deformation amount through the tensioning groove 3013, and after the supporting block 301 is installed in the cavity 101, the outer wall of the supporting block 301 and the inside of the cavity 101 form a large enough friction force by means of elastic deformation of the shape, so that the supporting block 301 is fixed, the installation is convenient, and the structure is stable and firm.

Further, as shown in fig. 1, in the present embodiment, the limit structures 4 are located on both sides of the support structure 3 to define the moving range of the inner jack 2. Specifically, the limiting structure 4 includes two fixing clips 401 disposed on the inner ram 2, the two fixing clips 401 are respectively located on the outer sides of the two support blocks 301 near the left and right ends of the drill rod housing 1, that is, as shown in fig. 1, the left fixing clip 401 is located on the left side of the leftmost support block 301, and the right fixing clip 401 is located on the right side of the rightmost support block 301, that is, the outer side is a side near the end of the drill rod housing, and conversely, the inner side is a side toward the core of the drill rod housing. The arrangement is such that the two fixing clips 401 in the limiting structure 4 can define a range of movement such that when the inner ram 2 is moved, for example, the inner ram 2 is moved in the left direction in fig. 1, the inner ram 2 stops moving to the left when the fixing clip 401 on the right side contacts its adjacent support block 301, and conversely, when the fixing clip 401 on the left side contacts its adjacent support block 301, the inner ram 2 stops moving to the right. The arrangement is such that the inner mandril 2 can freely reciprocate in the displacement range.

Further, in practical application, the drilling tool needs to be connected end to end through a plurality of drill rods for mining drilling of the invention to realize drilling work, and in order to realize that the inner ejector rod 2 can automatically return to the original position after each drill rod is disconnected, as shown in fig. 1, the limiting structure 4 further comprises a limiting spring 402, and the limiting spring 402 is arranged between one of the fixing clamps 401 and the supporting block 301 which is adjacent to the fixing clamp 401. Specifically, in the present embodiment, the stopper spring 402 is provided between the right fixing clip 401 and the right support block 301 in fig. 1. The arrangement is such that when the inner mandril 2 is pushed to the left, the conversion device at the foremost end of the drilling tool is started through the sliding of the inner mandril 2, thus the influence of the drilling length on the conversion of the conversion device can be eliminated through the arrangement of a plurality of drill rods. In addition, in the invention, for example, in order to realize that the foremost end conversion device can be started by pushing the inner mandril 2 of the last drill rod after the drill rods are connected, the reserved slidable distance of the inner mandril 2 after the drill rods are connected in the front and back direction is still larger than the sliding distance of the inner mandril required by starting the rotating device. In this way, whether the switching device has completed the switching can also be determined by the moving distance of the inner jack 2.

According to one embodiment of the invention, as shown in fig. 1, one end (i.e. the left end in fig. 1) of the inner ram 2 far away from the limiting spring 402 is connected with a joint 5 for switching the inner ram 2 in other drill rods. By the arrangement, the inner cores of the drill rods can be connected through the joint 5, so that the conversion device at the foremost end of the drilling tool can be started by pushing the inner ejector rod 2 at the outermost side, and the influence of the drilling length on the conversion of the conversion device is eliminated.

In the present embodiment, an annular retainer ring 6 is provided between the stopper spring 402 and the corresponding fixing clip 401. So set up, can be so that spacing paralysed 402's position is stable, and can not bump the fixing clip 401, make overall structure stable firm.

According to the arrangement of the invention, the inner ejector rod capable of sliding back and forth is arranged in the drill rod, and the conversion device at the forefront end of the drilling tool is started by the back and forth sliding of the inner ejector rod, so that the influence of the drilling length on the conversion of the conversion device is eliminated; meanwhile, whether the conversion device has completed conversion or not can be judged through the moving distance of the inner mandril. The technical problem that when the length of a drill rod is too long, the conversion device cannot be normally converted or the normal conversion of the conversion device can be ensured only by requiring the continuous rising of the water supply pressure of a rear-end drilling tool due to the pressure drop generated after high-pressure water passes through the drill rod in the prior art is solved.

Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the invention as defined by the appended claims.