Novel drill rod

Abstract

The utility model provides a novel drill rod which comprises a drill rod body and a drill rod thread assembly, the drill rod thread assembly comprises a first drill rod thread unit and a second drill rod thread unit which are the same in outer diameter, and the outer circumferential face of the first drill rod thread unit and the outer circumferential face of the second drill rod thread unit are both provided with the same outer threads. One end of the first drill rod thread unit is fixedly connected with one end of the second drill rod thread unit, a first groove is formed in the outer circumferential face of the fixedly-connected position of the first drill rod thread unit and the second drill rod thread unit, and one end of the second drill rod thread unit is fixedly connected with one end of the drill rod body. The other end of the first drill rod thread unit extends into the drill bit and is in threaded connection with the drill bit, when the first drill rod thread unit loses efficacy or cannot be used in cooperation with the drill bit, a lathe can be used for turning off the first drill rod thread unit from the first groove, and the second drill rod thread unit is used in cooperation with the drill bit in a threaded mode. Therefore, the drill rod can be reused, materials are saved, and cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of rock drilling tool drill rods, and in particular relates to a new type of drill rod. Background Art

[0002] Rock drilling tools are important tools in the fields of railway, highway, water conservancy construction, mining, communication base station construction, etc. During the use of the drill rod, due to the large changes in the geological environment, the torque on the drill rod will also change, resulting in uneven torque on the drill rod during the drilling process. Long-term work in such an environment will cause wear between the drill rod and the drill bit, making the drill rod scrapped. Due to the high price of the drill rod, if the worn drill rod is directly thrown away, it will cause great waste and increase the construction cost. Utility Model Content

[0003] In order to solve the problem that the drill rod is directly thrown away after the rod and the drill bit cannot be used together, which causes waste and increases the construction cost, the utility model provides a new drill rod, which is used in conjunction with the drill bit. The new drill rod includes:

[0004] Drill rod body;

[0005] A drill rod threaded assembly, the drill rod threaded assembly comprises a first drill rod threaded unit and a second drill rod threaded unit with the same outer diameter, the first drill rod threaded unit and the second drill rod threaded unit are both provided with the same external thread on their outer circumferential surfaces, one end of the first drill rod threaded unit is fixedly connected to one end of the second drill rod threaded unit, the center axis of the first drill rod threaded unit and the center axis of the second drill rod threaded unit after the fixed connection are in the same straight line, a first groove is formed on the outer circumferential surface of the fixed connection between the first drill rod threaded unit and the second drill rod threaded unit, the minimum diameter of the first groove is smaller than the diameter of the external thread root, one end of the second drill rod threaded unit is fixedly connected to one end of the drill rod body, the other end of the first drill rod threaded unit extends into the interior of the drill bit and is threadedly connected to the drill bit, and the first groove is located outside the drill bit.

[0006] In some embodiments, the width of the first groove is greater than or equal to 2 mm; the ratio L between the minimum diameter of the first groove and the diameter of the external thread root is in the range of: 0.95≤L≤0.99.

[0007] In some embodiments, a ratio K1 between the width of the first groove and the length of the first drill rod thread unit is in the range of 0.03≤K1≤0.4.

[0008] In some embodiments, a ratio K2 of the length of the first drill rod thread unit to the depth of the drill bit internal thread is in the range of 0.8≤K2≤1.

[0009] In some embodiments, the length of the first drill tool threaded unit is the same as the length of the second drill tool threaded unit.

[0010] In some embodiments, the inner diameter of the first drill tool threaded unit is the same as the inner diameter of the second drill tool threaded unit.

[0011] In some embodiments, the outer circumferential surface of the fixed connection between the drill rod body and the second drill rod threaded unit is concave to form a second groove, the other end of the drill rod body is provided with an internal thread, and the drill rod body is threadedly connected to an external drilling rig through the end provided with the internal thread.

[0012] In some embodiments, the other end of the drill rod body is fixedly connected to the second drill rod threaded unit in another drill rod threaded assembly, and the outer circumferential surface of the drill rod body and the two second drill rod threaded units are respectively concave to form a third groove and a fourth groove, and the first drill rod threaded unit in another drill rod threaded assembly is connected to the external drilling rig thread through the external thread.

[0013] In some embodiments, the axial cross-section of the first groove is a straight line in the middle and arcs at both ends.

[0014] In some embodiments, an axial cross-sectional shape of the first groove is U-shaped.

[0015] In order to solve the problem of waste caused by directly throwing away the drill rod after the drill rod and the drill bit cannot be used together, which causes the problem of increased construction cost, the utility model has the following advantages:

[0016] 1. A drill rod thread assembly is arranged at the end of the drill rod, the drill rod thread assembly includes a first drill rod thread unit and a second drill rod thread unit with the same outer diameter, the outer circumferential surface of the first drill rod thread unit and the outer circumferential surface of the second drill rod thread unit are both provided with the same external thread, one end of the first drill rod thread unit is fixedly connected to one end of the second drill rod thread unit, a first groove is formed on the outer circumferential surface of the fixed connection between the first drill rod thread unit and the second drill rod thread unit, the minimum diameter of the first groove is smaller than the diameter of the external thread root, one end of the second drill rod thread unit is fixedly connected to one end of the drill rod body, the other end of the first drill rod thread unit extends into the interior of the drill bit and is threadedly connected to the drill bit, when the first drill rod thread unit cannot be used in conjunction with the drill bit, the first drill rod thread unit can be turned out from the first groove by a lathe, and the second drill rod thread unit can be used in conjunction with the drill bit thread, thereby achieving the goal of reusing the drill rod, saving materials, and reducing construction costs.

[0017] 2. The minimum diameter of the first groove is smaller than the diameter of the external thread root, which is conducive to the discharge of broken chips and powder during thread processing and improves the thread processing quality.

[0018] 3. When recycling the drill rod body, under ideal conditions, there is no need to process the chamfers again. It is sufficient to directly turn off the broken position of the second drill rod thread unit and the first drill rod thread unit. The processing is convenient and durable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of a new type of drill rod and drill bit threaded connection;

[0020] Figure 2 It is a schematic diagram of the overall structure of a new type of drill rod;

[0021] Figure 3 is a schematic diagram of the threaded connection between the outer peripheral surface of the second drill rod thread unit and the drill bit;

[0022] Figure 4 The figure is a schematic diagram of the overall structure of a new type of drill rod. DETAILED DESCRIPTION

[0023] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, rather than implying any limitation on the scope of the present disclosure.

[0024] As used herein, the term "including" and its variants are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "based at least in part on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like is based on the orientation or position relationship shown in the accompanying drawings. These terms are mainly for better describing the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, in addition to being used to indicate an orientation or position relationship, some of the above terms may also be used to indicate other meanings, such as the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances. In addition, the terms "install", "set", "provided with", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0025] like Figure 1 , Figure 2 , Figure 3 As shown, this embodiment discloses a new type of drill rod, which is used in conjunction with a drill bit 60. The new type of drill rod includes:

[0026] Drill rod body 10;

[0027] A drill rod threaded assembly 20, the drill rod threaded assembly 20 includes a first drill rod threaded unit 21 and a second drill rod threaded unit 22 with the same outer diameter, the same external thread is provided on the outer circumferential surface of the first drill rod threaded unit 21 and the outer circumferential surface of the second drill rod threaded unit 22, one end of the first drill rod threaded unit 21 is fixedly connected to one end of the second drill rod threaded unit 22, the central axis of the first drill rod threaded unit 21 and the central axis of the second drill rod threaded unit 22 after the fixed connection are in the same straight line, a first groove 23 is formed on the outer circumferential surface of the fixed connection between the first drill rod threaded unit 21 and the second drill rod threaded unit 22, the minimum diameter of the first groove 23 is smaller than the diameter of the external thread root, one end of the second drill rod threaded unit 22 is fixedly connected to one end of the drill rod body 10, the other end of the first drill rod threaded unit 21 extends into the interior of the drill bit 60 and is threadedly connected to the drill bit 60, and the first groove 23 is located outside the drill bit 60.

[0028] In the above, through the drill rod thread assembly 20 at the end of the drill rod, the drill rod thread assembly 20 includes a first drill rod thread unit 21 and a second drill rod thread unit 22 with the same outer diameter, the outer circumferential surface of the first drill rod thread unit 21 and the outer circumferential surface of the second drill rod thread unit 22 are both provided with the same external thread, one end of the first drill rod thread unit 21 is fixedly connected to one end of the second drill rod thread unit 22, and a first groove 23 is formed on the outer circumferential surface of the fixed connection between the first drill rod thread unit 21 and the second drill rod thread unit 22. 3 is smaller than the diameter of the external thread root, one end of the second drill rod thread unit 22 is fixedly connected to one end of the drill rod body 10, and the other end of the first drill rod thread unit 21 extends into the interior of the drill bit 60 and is threadedly connected to the drill bit 60. When the first drill rod thread unit 21 cannot be used in conjunction with the drill bit 60, the first drill rod thread unit 21 can be turned off from the first groove 23 by a lathe, and the second drill rod thread unit 22 can be used in conjunction with the drill bit 60 thread, thereby playing the role of reusable drill rod, saving materials, and reducing construction costs. In addition, the minimum diameter of the first groove 23 is smaller than the diameter of the external thread root, which is conducive to the discharge of broken chips and powder during thread processing and improves the thread processing quality. When recycling the drill rod body 10, under ideal conditions, it is not necessary to process the chamfer again, and the second drill rod thread unit 22 and the first drill rod thread unit 21 can be directly turned at the broken position, which is convenient and durable to process.

[0029] In some embodiments, the width of the first groove 23 is greater than or equal to 2 mm; the ratio L between the minimum diameter of the first groove and the diameter of the external thread root is in the range of 0.95≤L≤0.99, and the ratio L between the minimum diameter of the first groove 23 and the diameter of the external thread root in the present application is preferably 0.99. In this embodiment, through the above-mentioned setting, a certain proportional relationship can be established between the minimum diameter of the first groove 23 and the diameter of the external thread root, thereby avoiding the situation where the ratio of the minimum diameter of the first groove 23 to the external thread root is too small, resulting in the first groove 23 being easily broken during use.

[0030] In some embodiments, the ratio K1 between the width of the first groove 23 and the length of the first drill rod thread unit 21 is preferably in the range of 0.03≤K1≤0.4. In this embodiment, through the above setting, the width of the first groove can be set to have a certain proportional relationship with the length of the first drill rod thread unit 21, so that the drill rod thread assembly at the first groove 23 has a better overall structural strength, so that the service life of the new drill rod is increased.

[0031] In some embodiments, a ratio K2 between the length of the first drill rod thread unit 21 and the depth of the internal thread of the drill bit 60 has a value range of 0.8≤K2≤1.

[0032] In some embodiments, the length of the first drill rod threaded unit 21 is the same as the length of the second drill rod threaded unit 22, but in some cases, the lengths of the first drill rod threaded unit 21 and the second drill rod threaded unit 22 can also be set according to actual needs.

[0033] In some embodiments, the inner diameter of the first drill rod threaded unit 21 is the same as the inner diameter of the second drill rod threaded unit 22. By setting the inner diameter of the first drill rod threaded unit 21 and the inner diameter of the second drill rod threaded unit 22 to be the same, when the drill bit 60 is working, the gas generated by the external air compressor enters the first drill rod threaded unit 21 and the second drill rod threaded unit through the drill rod body 10 (the end of the drill rod body 10 that is threadedly connected to the drilling rig is also connected to the exhaust pipe of the air compressor, and this setting is the existing conventional setting). The flow rate of the gas will not change too much, thereby preventing the tube wall of the first drill rod threaded unit 21 and the tube wall of the second drill rod threaded unit 22 from being affected by excessive changes in the expansion pressure of the gas, generating excessive heat, and affecting the service life of the drill rod thread assembly 20, and avoiding the occurrence of excessive aerodynamic losses due to changes in the tube wall of the first drill rod threaded unit 21 and the second drill rod threaded unit 22.

[0034] like Figure 1As shown, in some embodiments, the outer circumferential surface of the fixed connection between the drill rod body 10 and the second drill rod thread unit 22 is concave to form a second groove 30, and the other end of the drill rod body 10 is provided with an internal thread, and the drill rod body 10 is threadedly connected to an external drilling rig through the end provided with the internal thread. In this embodiment, the power output shaft of the external drilling rig is provided with an external thread, and the external thread can be connected with the internal thread on the other end of the drill rod body 10.

[0035] like Figure 4 As shown, in some embodiments, the other end of the drill rod body 10 is fixedly connected to the second drill rod thread unit 22 in another drill rod thread assembly 20, and the outer circumferential surface of the fixed connection between the drill rod body 10 and the two second drill rod thread units 22 is respectively concave to form a third groove 40 and a fourth groove 50, and the first drill rod thread unit 21 in another drill rod thread assembly 20 is threadedly connected to the external rock drill through the external thread. In this embodiment, the power output shaft of the external rock drill is provided with an internal thread, and the internal thread is threadedly connected to the first drill rod thread unit 21 in another drill rod thread assembly 20.

[0036] In some embodiments, the axial cross-section of the first groove 23 is a straight line in the middle and arcs at both ends.

[0037] In some embodiments, the axial cross-section of the first groove 23 is U-shaped.

[0038] In the above, by making the axial cross-section of the first groove 23 straight in the middle and arc-shaped at both ends, or making the axial cross-section of the first groove 23 U-shaped, so that the minimum diameter of the first groove 23 is tubular or arc-shaped, it is possible to avoid the drill bit 60 being damaged by excessive stress at the minimum diameter of the first groove 23 when working.

[0039] like Figure 3 As shown, in the above embodiment, the drill rod body 10 is a quick-change drill rod or MF drill rod, one end of which is provided with an internal thread, and can be used alone or by threading one end of the internal thread of multiple change drill rods or MF drill rods with one end of the external thread. In this embodiment, when the drill rod body 10 is forged, its external thread end is replaced by the drill rod thread assembly 20.

[0040] But in some cases, such as Figure 4 As shown, the drill rod body 10 is originally a drill rod with external threads at both ends, which mainly serves as a connection. During production, the threads at both ends of the drill rod body 10 can be replaced by two drill rod thread assemblies 20.

[0041] In the above, by setting the first groove 23, when the drill bit 60 is working, high-pressure gas is ejected from the air hole of the drill bit 60 to flush the gravel out of the borehole. Since the distance between the first groove 23 and the borehole wall is large, the first groove 23 can also increase the amount of gravel flushed out to avoid blockage of the borehole.

[0042] The working principle of the utility model is:

[0043] During the use of the drill rod body 10, when the connection between the first drill rod threaded unit 21 and the drill bit 60 is worn and the first drill rod threaded unit 21 cannot be used with the drill bit 60, the first drill rod threaded unit 21 can be turned out from the first groove 23 by a lathe, and the second drill rod threaded unit 22 can be used in conjunction with the drill bit 60 thread, thereby achieving the goal of reusing the drill rod, saving materials, and reducing construction costs.

[0044] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present disclosure, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present disclosure.

Claims

1. A new type of drill rod, used in conjunction with a drill bit, characterized in that: The novel drill rod comprises: Drill rod body; A drill rod threaded assembly, the drill rod threaded assembly includes a first drill rod threaded unit and a second drill rod threaded unit with the same outer diameter, the first drill rod threaded unit and the second drill rod threaded unit are both provided with the same external thread on their outer circumferential surfaces, one end of the first drill rod threaded unit is fixedly connected to one end of the second drill rod threaded unit, the center axis of the first drill rod threaded unit and the center axis of the second drill rod threaded unit after the fixed connection are in the same straight line, a first groove is formed on the outer circumferential surface of the fixed connection between the first drill rod threaded unit and the second drill rod threaded unit, the minimum diameter of the first groove is smaller than the diameter of the external thread root, one end of the second drill rod threaded unit is fixedly connected to one end of the drill rod body, the other end of the first drill rod threaded unit extends into the interior of the drill bit and is threadedly connected to the drill bit, and the first groove is located outside the drill bit.

2. A new type of drill rod according to claim 1, characterized in that: The width of the first groove is greater than or equal to 2 mm; the ratio L between the minimum diameter of the first groove and the diameter of the external thread root is in the range of: 0.95≤L≤0.

99.

3. A new type of drill rod according to claim 2, characterized in that: The ratio K1 between the width of the first groove and the length of the first drill rod thread unit has a value range of 0.03≤K1≤0.

4.

4. A new type of drill rod according to claim 1, characterized in that: The value range of the ratio K2 between the length of the first drill rod thread unit and the depth of the drill bit internal thread is: 0.8≤K2≤1.

5. A new type of drill rod according to claim 4, characterized in that: The length of the first drill rod threaded unit is the same as the length of the second drill rod threaded unit.

6. A novel drill rod according to claim 1, characterized in that: The inner diameter of the first drill rod threaded unit is the same as the inner diameter of the second drill rod threaded unit.

7. A new type of drill rod according to claim 1, characterized in that: The outer circumferential surface of the fixed connection between the drill rod body and the second drill rod threaded unit is concave to form a second groove, the other end of the drill rod body is provided with an internal thread, and the drill rod body is threadedly connected to an external drilling machine through one end provided with the internal thread.

8. A novel drill rod according to claim 1, characterized in that: The other end of the drill rod body is fixedly connected to the second drill rod threaded unit in another drill rod threaded assembly, and the outer circumferential surface of the drill rod body and the two second drill rod threaded units are respectively concave to form a third groove and a fourth groove, and the first drill rod threaded unit in another drill rod threaded assembly is connected to the external drilling rig thread through the external thread.

9. A novel drill rod according to claim 1, characterized in that: The axial cross-section of the first groove is in the shape of a straight line in the middle and arc lines at both ends.

10. A novel drill rod according to claim 1, characterized in that: The axial cross-section of the first groove is U-shaped.

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