Double-thread connection drill rod

Abstract

The utility model relates to the technical field of threaded drill rods, and discloses a double-thread connection drill rod which comprises a double-thread drill rod body, second threaded grooves are formed in the peripheries of the left end and the right end of the double-thread drill rod body, third tool withdrawal grooves are formed in the close sides of the two second threaded grooves, second tool withdrawal grooves are formed in the close sides of the two third tool withdrawal grooves, and the first tool withdrawal grooves and the second tool withdrawal grooves are communicated through the second tool withdrawal grooves. First thread grooves are formed in the sides, close to each other, of the two second tool withdrawal grooves, first tool withdrawal grooves are formed in the sides, close to each other, of the two first thread grooves, the two first thread grooves and the two second thread grooves are in the shape of T-shaped teeth, and the T-shaped teeth can improve the torque transmission efficiency. According to the double-thread drill rod, in the rock drilling working process, the second thread groove loses efficacy, the double-thread drill rod is broken at the second tool withdrawal groove or the third tool withdrawal groove, the first thread groove can be screwed into a drill tool again for reuse, and under the same condition, repeated utilization is truly achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of threaded drill rods, in particular to a double-thread connection drill rod. Background Art

[0002] The threaded rock drill rod is a tool for rock drilling. Both sides of the drill rod are composed of two sections of threads (double-headed threads) and can be connected to other rock drill tools. According to the relationship between the thread diameter and the outer diameter of the rod body, the threaded rock drill rod can be divided into four categories: tunneling drill rods, connecting drill rods, light connecting drill rods, and quick-change drill rods. Its main uses include heading in level tunnels, underground mining, or open-pit mining, etc.

[0003] Generally, a single-headed threaded rock drill rod (both sides are single-headed threads in the figure) is screwed into the rock drilling machine equipment. During the rock drilling work in the mine tunnel, the casing, drill rod, and bit are all connected by single-headed thread matching. When the single-headed threaded drill rod is worn out and fails, generally, the thread fails and cannot be used. To replace and disassemble the drill rod, the failure of the thread means that the whole drill rod is scrapped and cannot be used again.

[0004] The use design of the single-headed threaded drill rod seriously affects the rock drilling efficiency. Based on these problems, in order to improve the rock drilling efficiency and reduce the labor cost, a double-thread connection drill rod is proposed to solve the above problems. Content of the Utility Model

[0005] In order to make up for the above deficiencies, the utility model provides a double-thread connection drill rod, aiming to improve the problem that the thread of the single-headed threaded rock drill rod in the prior art is worn out and fails, cannot be used again, and when replacing and disassembling to use a new single-headed threaded drill rod, it affects the rock drilling progress efficiency, causes the waste loss of the drill rod material, loses the big for the small, the replacement is time-consuming, resulting in the reduction of the rock drilling efficiency and the increase of the labor and material costs.

[0006] To achieve the above object, the utility model provides the following technical solution: a double-thread connection drill rod, including a double-thread drill rod. Thread grooves two are respectively opened on the outer circumferences of the left and right ends of the double-thread drill rod. Relieving grooves three are respectively opened on the adjacent sides of the two thread grooves two. Relieving grooves two are respectively opened on the adjacent sides of the two relieving grooves three. Thread grooves one are respectively opened on the adjacent sides of the two relieving grooves two. Relieving grooves one are respectively opened on the adjacent sides of the two thread grooves one.

[0007] Further, the two thread grooves one and the two thread grooves two are both in the shape of T-shaped teeth, and the T-shaped teeth can improve the efficiency of torque transmission.

[0008] Further, the relieving groove one, the thread groove one, the relieving groove two, the relieving groove three, and the thread groove two are linearly arranged in sequence on the left and right sides of the double-thread drill rod.

[0009] Further, the length ratio of the second relief groove to the third relief groove is 1:1.5, and the length ratio of the first relief groove to the third relief groove is 2:1.

[0010] Further, the diameter ratio of the cross-sections at the first relief groove, the second relief groove, and the third relief groove is 1:1:1.

[0011] The utility model has the following beneficial effects:

[0012] 1. In the utility model, through the design of double-headed helix on both sides of the drill rod, during the rock drilling process, when the second thread groove fails and breaks at the second relief groove or the third relief groove, the first thread groove can be screwed into the drill tool again for reuse. The utilization rate of one double-thread drill rod is equal to that of two single-thread drill rods, truly achieving one replacing two. This not only reduces the problem of frequent adjustment and disassembly, but also reduces the time required for replacing the whole rod, improves the rock drilling efficiency, reduces the manual labor force, and truly realizes the function of repeated utilization of the double-thread drill rod under the same conditions.

[0013] 2. In the utility model, through the design of T-shaped teeth on the first thread groove and the second thread groove, the mating torque of the double-thread connected drill rod can be increased, making the torque transmission efficiency between the first thread groove and the second thread groove higher. Description of the Drawings

[0014] Figure 1 is a perspective view of the double-thread connected drill rod proposed by the utility model;

[0015] Figure 2 is a schematic diagram of the first relief groove of the double-thread connected drill rod proposed by the utility model;

[0016] Figure 3 is a schematic diagram of the second thread groove of the double-thread connected drill rod proposed by the utility model.

[0017] Legend Explanation:

[0018] 1. Double-thread drill rod; 2. First relief groove; 3. First thread groove; 4. Second relief groove; 5. Third relief groove; 6. Second thread groove. Detailed Embodiment

[0019] Next, the technical solutions in the embodiments of the utility model will be clearly and completely described in conjunction 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, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the utility model.

[0020] Refer to Figures 1 - 3The utility model provides an embodiment: a double-threaded drill rod, comprising a double-threaded drill rod 1, the double-threaded drill rod 1 can be rotated to transmit power in a rock drill device, the left and right ends of the double-threaded drill rod 1 are provided with thread grooves 2 6, the thread grooves 2 6 can be used as a transmission section of the first-level power transmission, the adjacent sides of the two thread grooves 2 6 are provided with retreat grooves 3 5, the adjacent sides of the two retreat grooves 3 5 are provided with retreat grooves 2 4, the adjacent sides of the two retreat grooves 2 4 are provided with thread grooves 1 3, the adjacent sides of the two thread grooves 1 3 are provided with retreat grooves 1 2, the retreat grooves 1 2, the thread grooves 1 3, the retreat grooves 2 4, the retreat grooves 3 5 and the thread grooves 2 6 are arranged in a linear sequence on the left and right sides of the double-threaded drill rod 1, and the retreat grooves 2 4 and the retreat grooves 3 5 are arranged in a linear sequence. The length ratio of groove three 5 is 1:1.5, the length ratio of undercut groove one 2 and undercut groove three 5 is 2:1, undercut groove one 2, undercut groove two 4 and undercut groove three 5 can be used as the installation structure support of rock drilling equipment, the double threaded drill rod 1 is composed of high carbon steel and other elements such as chromium, nickel and molybdenum, and the special alloy steel can enhance the structural strength of the double threaded drill rod 1 and extend the service life of the double threaded drill rod 1, the diameter ratio of the cross section at undercut groove one 2, undercut groove two 4 and undercut groove three 5 is 1:1:1, and the cross section at undercut groove one 2, undercut groove two 4 and undercut groove three 5 is kept consistent so that the installation of the double threaded drill rod 1 will not go wrong, the two thread grooves one 3 and the two thread grooves two 6 are in the shape of T-shaped teeth, and the T-shaped teeth can improve the efficiency of transmitting torque.

[0021] Working principle: During the long-term rock drilling operation of the rock drill equipment, the structural strength of the double-thread drill rod 1 will decrease, the thread groove 2 6 will be worn out after long-term use, or the double-thread drill rod 1 will break at the back cutter groove 2 4 or the back cutter groove 3 5 under the strong torque of the rock drill equipment. The thread groove 1 3 can be used to screw the drill tool into the drill tool and install it again, so that it can be truly reused under the same conditions.

[0022] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A double-threaded drill rod, comprising a double-threaded drill rod (1), characterized in that: The left and right ends of the double-thread drill rod (1) are both provided with thread grooves 2 (6) on their outer circumferences, the two thread grooves 2 (6) are both provided with tool retreat grooves 3 (5) on their adjacent sides, the two tool retreat grooves 3 (5) are both provided with tool retreat grooves 2 (4) on their adjacent sides, the two tool retreat grooves 2 (4) are both provided with thread grooves 1 (3) on their adjacent sides, and the two thread grooves 1 (3) are both provided with tool retreat grooves 1 (2) on their adjacent sides.

2. The double-threaded drill rod according to claim 1, characterized in that: The two thread grooves 1 (3) and the two thread grooves 2 (6) are both in the shape of T-shaped teeth, and the T-shaped teeth can improve the efficiency of transmitting torque.

3. The double-threaded drill rod according to claim 1, characterized in that: The first undercut groove (2), the first thread groove (3), the second undercut groove (4), the third undercut groove (5) and the second thread groove (6) are arranged in a linear sequence on the left and right sides of the double-thread drill rod (1).

4. The double-threaded drill rod according to claim 1, characterized in that: The length ratio of the second undercut groove (4) to the third undercut groove (5) is 1:1.5, and the length ratio of the first undercut groove (2) to the third undercut groove (5) is 2:

1.

5. The double-threaded drill rod according to claim 1, characterized in that: The diameter ratio of the cross sections at the first undercut groove (2), the second undercut groove (4) and the third undercut groove (5) is 1:1:1.

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