A drill bit for preventing a drill pipe from being stuck

Abstract

This utility model provides an anti-jamming rock drill bit, belonging to the technical field of rock drill bits. The anti-jamming rock drill bit provided by this utility model includes a connecting part, a drilling part, and drill teeth; the connecting part is used to connect to the drill rod; the drilling part is connected to the end of the connecting part; the drill teeth are disposed on the drilling part; the drilling part has several conical feet, which are arranged at intervals in a circumferential direction and fixed to the outer periphery of the drilling part; an arc-shaped connecting body connects adjacent two conical feet; the drilling part, the two adjacent conical feet, and the arc-shaped connecting body form a chip removal groove; the outer periphery of the arc-shaped connecting body and the outer periphery of the conical feet together form a circular structure; wherein, a mounting platform is provided on the conical feet, and the two ends of the arc-shaped connecting body are detachably mounted on the mounting platforms on the two adjacent conical feet; this drill bit can forcibly restrict the hole wall contour to a circle during pure impact operation, significantly reducing the probability of hammer jamming accidents and improving hole forming efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of rock drilling bit technology, and more specifically, it relates to a rock drilling bit that prevents the drill bit from getting stuck. Background Technology

[0002] Cross-shaped rock drill bit, such as Figure 2 As shown, due to its symmetrical cross-shaped structure, large chip removal groove design, and high impact resistance, it is widely used in percussion drilling of hard rock formations. Its working principle is as follows: the drilling rig drives the drill bit to hammer the rock at the bottom of the hole at high frequency, breaking the rock mass through the carbide teeth at the ends of the four cone feet, while efficient chip removal is achieved through deep grooves between the cone feet. This type of drill bit performs well in homogeneous hard rock, but has serious shortcomings in complex working conditions such as riprap layers and alternating soft and hard formations.

[0003] During construction, some pile foundations were constructed using impact drilling technology. Due to the high strength of both the backfill layer and the bearing stratum rock, hammer jamming frequently occurred in the early stages of construction. Dealing with hammer jamming was time-consuming and labor-intensive, and the irregular shape of the pile hole also affected the quality of pile formation. The specific reasons, after analysis, are as follows:

[0004] 1. The irregular shape of the cross-shaped rock drill bit causes the drill bit to get stuck in the narrow part during the impact process, resulting in a hammer jamming accident.

[0005] 2. Uneven hardness in the riprap layer causes the pendulum to tilt, resulting in a stuck drill. Utility Model Content

[0006] The purpose of this utility model is to provide a rock drilling bit that prevents the drill bit from getting stuck, so as to solve the technical problem that cross rock drilling bits in the early stage of construction often get stuck.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A rock drill bit with anti-jamming capability is provided, comprising a connecting part, a rock-drilling part, and drill teeth; the connecting part is used to connect to a drill rod; the rock-drilling part is connected to the end of the connecting part; the drill teeth are disposed on the rock-drilling part; the rock-drilling part is provided with a plurality of conical feet, which are arranged at intervals in a circumferential direction and fixed to the outer periphery of the rock-drilling part; an arc-shaped connecting body is connected between two adjacent conical feet; a chip removal groove is formed between the rock-drilling part, the two adjacent conical feet, and the arc-shaped connecting body; the outer periphery of the arc-shaped connecting body and the outer periphery of the conical feet together form a circular structure; wherein, a mounting platform is provided on the conical feet, and the two ends of the arc-shaped connecting body are respectively detachably mounted on the mounting platforms on the two adjacent conical feet.

[0009] In one possible implementation, based on the above technical solutions, the arc-shaped connector includes a first mounting body, an arc-shaped impact body, and a second mounting body. The first mounting body is connected to one end of the arc-shaped impact body, and the second mounting body is connected to the other end of the arc-shaped impact body.

[0010] In one possible implementation, based on the above technical solutions, a first groove is provided at one end of the arc-shaped impactor, and the first mounting body is inserted into the first groove; a second groove is provided at the other end of the arc-shaped impactor, and the second mounting body is inserted into the second groove.

[0011] In one possible implementation, based on the above technical solutions, the first mounting body has a transverse hole, and the side wall of the mounting platform has a first fixing hole. A first fastener is installed in the transverse hole and the first fixing hole to fix the first mounting body to the first fixing hole.

[0012] In one possible implementation, based on the above technical solutions, the second mounting body has a vertical hole, the mounting platform has a second fixing hole, and a second fastener is installed in the vertical hole and the second fixing hole to fix the second mounting body to the second fixing hole.

[0013] In one possible implementation, based on the above technical solutions, the first mounting body is provided with a first oil injection hole, which communicates with the horizontal hole, and a first sealing body is provided inside the first oil injection hole. The second mounting body is provided with a second oil injection hole, which communicates with the vertical hole, and a second sealing body is provided inside the second oil injection hole.

[0014] In one possible implementation, based on the above technical solutions, the longitudinal cross-section of the arc-shaped impactor is circular.

[0015] The beneficial effects of this utility model's anti-jamming rock drill bit are as follows: Compared with the prior art, by connecting an arc-shaped connector to adjacent cone feet, the arc-shaped connector plays a filling and guiding role between adjacent cone feet. When the drill bit impacts, the arc-shaped connector itself also contacts and squeezes the hole wall, forcibly restricting the hole wall contour to a circle. This solves the defect that traditional cross drill bits cannot form a round hole in pure impact operations (such as some impact drills and down-the-hole hammers that may not rotate sufficiently) or in formations with limited rotation. Because the hole wall is forcibly rounded, the hole diameter is relatively uniform, and the radial clearance between the drill bit and the hole wall is guaranteed. During the impact process, when the drill bit moves up and down, the risk of getting stuck in narrow protrusions is greatly reduced. Furthermore, the arc-shaped connector provides more contact points with the hole wall, which is equivalent to increasing the guiding area, helping to stabilize the drill bit, reducing the "pendulum" phenomenon, thereby reducing the risk of hole deviation and the probability of subsequent drill jamming. In addition, the arc-shaped connector may be damaged during frequent operation, so making the arc-shaped connector a detachable structure allows for easy replacement, achieving the purpose of quick disassembly and quick replacement. In addition, by making the arc-shaped connector a detachable structure, it can be installed when needed and disassembled when not needed, making the application scenarios more diverse. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the structure of an anti-jamming rock drill bit provided for an embodiment of this utility model;

[0018] Figure 2 This is a schematic diagram of the planar structure of a cross-shaped rock drill bit in the prior art;

[0019] Figure 3 This is a structural schematic diagram from another perspective of an anti-jamming rock drill bit provided for an embodiment of the present utility model;

[0020] Figure 4 A schematic diagram of the structure of a mounting platform for an anti-jamming rock drill bit provided for an embodiment of this utility model;

[0021] Figure 5 This is a schematic diagram of the structure of an arc-shaped connector for an anti-jamming rock drill bit provided in an embodiment of the present invention.

[0022] The labels for the attached figures are as follows:

[0023] 100. Connecting part; 200. Rock drilling part; 210. Cone foot; 211. Mounting platform; 212. First fixing hole;

[0024] 213. First fastener; 214. Second fixing hole; 215. Second fastener; 300. Drill teeth;

[0025] 400. Arc-shaped connector; 410. First mounting body; 411. Transverse hole; 412. First oil injection hole;

[0026] 420. Arc-shaped impact body; 430. Second mounting body; 431. Vertical hole; 432. Second oil injection hole;

[0027] 500. Chip removal groove. Detailed Implementation

[0028] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the described embodiments are only a part of the embodiments of this application, not all of them. The specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] It should be further explained that the accompanying drawings and embodiments of this utility model mainly describe the concept of this utility model. Based on this concept, some specific forms and settings of connection relationships, positional relationships, power mechanisms, power supply systems, hydraulic systems and control systems may not be fully described. However, under the premise that those skilled in the art understand the concept of this utility model, they can implement the above-mentioned specific forms and settings in a well-known manner.

[0030] When a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0031] The directional terms "inner" and "outer" refer to the inner and outer sides relative to the outline of each component itself. The terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, and the spatial relative descriptions used herein will be interpreted accordingly.

[0033] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "multiple" means two or more, and "several" means one or more, unless otherwise explicitly specified.

[0034] The present invention will now describe an anti-jamming rock drill bit.

[0035] like Figure 1 and Figure 3As shown, this utility model provides a rock drill bit for preventing jamming, including a connecting part 100, a rock drilling part 200, and drill teeth 300; the connecting part 100 is used to connect with the drill rod; the rock drilling part 200 is connected to the end of the connecting part 100; the drill teeth 300 are disposed on the rock drilling part 200; the rock drilling part 200 is provided with a plurality of conical feet 210, which are arranged at intervals in the circumferential direction and fixed to the outer periphery of the rock drilling part 200; an arc-shaped connecting body 400 is connected between two adjacent conical feet 210; the rock drilling part 200, the two adjacent conical feet 210, and the arc-shaped connecting body 400 form a chip removal groove 500; the outer periphery of the arc-shaped connecting body 400 and the outer periphery of the conical feet 210 together form a circular structure; wherein, a mounting platform 211 is provided on the conical feet 210, and the two ends of the arc-shaped connecting body 400 are respectively detachably mounted on the mounting platforms 211 on the two adjacent conical feet 210.

[0036] This utility model provides a rock drilling bit that prevents jamming, which differs from existing technologies ( Figure 2 In contrast, by connecting the arc-shaped connector 400 to adjacent cone feet 210, the arc-shaped connector 400 acts as a filler and guide between adjacent cone feet 210. When the drill bit impacts, the arc-shaped connector 400 itself also contacts and compresses the hole wall, forcibly restricting the hole wall profile to a circle. This solves the defect that traditional cross drill bits cannot form a round hole in pure impact operations (such as some impact drills and down-the-hole hammers that may not rotate sufficiently) or in formations with limited rotation. Because the hole wall is forcibly rounded, the hole diameter is relatively uniform, and the radial clearance between the drill bit and the hole wall is guaranteed. During the impact process, the risk of the drill bit getting stuck in narrow protrusions during its up-and-down reciprocating motion is greatly reduced. Furthermore, the arc-shaped connector 400 provides more contact points with the hole wall, which is equivalent to increasing the guiding area, helping to stabilize the drill bit, reducing the "pendulum" phenomenon, thereby reducing the risk of hole deviation and the probability of subsequent drill jamming. In addition, the arc-shaped connector 400 may be damaged during frequent operation, so making the arc-shaped connector 400 a detachable structure allows for easy replacement, achieving the purpose of quick disassembly and quick replacement. In addition, by making the arc-shaped connector 400 a detachable structure, it can be installed when needed and disassembled when not needed, making it versatile in application scenarios.

[0037] Furthermore, while shaping the drill hole into a round hole, a chip removal groove 500 is also retained on the drill bit to ensure that the drill cuttings can be smoothly discharged through the chip removal groove 500.

[0038] like Figure 5As shown in the embodiment of the present invention, in a specific implementation of an anti-jamming rock drill bit, the arc-shaped connecting body 400 includes a first mounting body 410, an arc-shaped impact body 420, and a second mounting body 430. The first mounting body 410 is connected to one end of the arc-shaped impact body 420, and the second mounting body 430 is connected to the other end of the arc-shaped impact body 420.

[0039] In one specific embodiment of the anti-jamming rock drill bit provided by this utility model, a first groove is provided at one end of the arc-shaped impact body 420, and a first mounting body 410 is inserted into the first groove. A second groove is provided at the other end of the arc-shaped impact body 420, and a second mounting body 430 is inserted into the second groove.

[0040] Specifically, the first mounting body 410 and the arc-shaped impact body 420, and the second mounting body 430 and the arc-shaped impact body 420 can be connected by welding, or by creating a first groove and a second groove (not shown in the attached figure) at both ends of the arc-shaped impact body 420, and then inserting the first mounting body 410 and the second mounting body 430 into the first groove and the second groove respectively. By using the plug-in method, if any of the first mounting body 410, the second mounting body 430 or the arc-shaped impact body 420 is damaged, only the damaged part can be replaced, which can minimize costs.

[0041] like Figure 3 , Figure 4 and Figure 5 As shown in the embodiment of the present invention, in a specific embodiment of a rock drilling bit for preventing jamming, a transverse hole 411 is provided on the first mounting body 410, and a first fixing hole 212 is provided on the side wall of the mounting platform 211. A first fastener 213 is installed in the transverse hole 411 and the first fixing hole 212 to fix the first mounting body 410 on the first fixing hole 212.

[0042] like Figure 3 , Figure 4 and Figure 5 As shown in the embodiment of the present invention, in a specific implementation of an anti-jamming rock drill bit, a vertical hole 431 is provided on the second mounting body 430, and a second fixing hole 214 is provided on the mounting platform 211. A second fastener 215 is installed in the vertical hole 431 and the second fixing hole 214 to hinge the second mounting body 430 to the second fixing hole 214.

[0043] It should be noted that the first fastener 213 and the second fastener 215 can be screws or bolts. By setting the horizontal hole 411 and the vertical hole 431 respectively, and using the first fastener 213 to fix the first mounting body 410 on the first fixing hole 212, and the second fastener 215 to fix the second mounting body 430 on the second fixing hole 214, the entire arc-shaped connector 400 can bear both vertical and horizontal forces. Compared with a structure that can only bear forces in one direction, the arc-shaped connector 400 is less prone to damage.

[0044] like Figure 5 As shown in the embodiment of the present invention, in a specific implementation of an anti-jamming rock drill bit, a first oil injection hole 412 is provided on the first mounting body 410, which communicates with the horizontal hole 411, and a first sealing body is provided inside the first oil injection hole 412. A second oil injection hole 432 is provided on the second mounting body 430, which communicates with the vertical hole 431, and a second sealing body is provided inside the second oil injection hole 432.

[0045] To prevent the first fastener 213 and the second fastener 215 from rusting during prolonged use, a first oil injection hole 412 and a second oil injection hole 432 are respectively provided on the first mounting body 410 and the second mounting body 430. Users need to periodically inject oil into the inside and periodically loosen the first fastener 213 and the second fastener 215. The first oil injection hole 412 is sealed with a first sealing body, and the second oil injection hole 432 is sealed with a second sealing body. The first sealing body and the second sealing body can be rubber pillars, screws, or bolts. If they are screws or bolts, then the first oil injection hole 412 and the second oil injection hole 432 need to be threaded holes.

[0046] like Figure 1 As shown in the embodiment of the present invention, in a specific implementation of an anti-jamming rock drill bit, the longitudinal cross-section of the arc-shaped impact body 420 is circular.

[0047] Specifically, such as Figure 1 As shown, when looking directly at... Figure 1 When drilling rock, the arc-shaped impact body 420 with a circular longitudinal section has a constant radius of curvature, resulting in uniform stress distribution when pressing against the hole wall and making it less prone to damage. Other types, such as square steel or slats, will have stress concentration at the edges and corners, making them prone to cracking under impact loads.

[0048] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A drag bit for rock drilling, characterized in that include: A connecting part (100) is used to connect with the drill rod; A rock-drilling part (200) is connected to the end of the connecting part (100); Drill teeth (300) are provided on the rock-drilling part (200); The rock-drilling part (200) is provided with a plurality of conical feet (210), which are arranged at intervals in the circumferential direction and fixed to the outer periphery of the rock-drilling part (200); an arc-shaped connector (400) connects two adjacent conical feet (210); the rock-drilling part (200), the two adjacent conical feet (210) and the arc-shaped connector (400) form a chip removal groove (500); the outer periphery of the arc-shaped connector (400) and the outer periphery of the conical feet (210) together form a circular structure; The cone foot (210) is provided with a mounting platform (211), and the two ends of the arc-shaped connector (400) are respectively detachably mounted on the mounting platform (211) on two adjacent cone feet (210).

2. A drag bit as defined in claim 1 wherein: The arc-shaped connector (400) includes a first mounting body (410), an arc-shaped impactor (420), and a second mounting body (430). The first mounting body (410) is connected to one end of the arc-shaped impactor (420), and the second mounting body (430) is connected to the other end of the arc-shaped impactor (420).

3. A drag bit as defined in claim 2 wherein: One end of the arc-shaped impactor (420) is provided with a first groove, and the first mounting body (410) is inserted into the first groove. The other end of the arc-shaped impactor (420) is provided with a second groove, and the second mounting body (430) is inserted into the second groove.

4. A drag bit as defined in claim 3 wherein: The first mounting body (410) has a transverse hole (411), and the side wall of the mounting platform (211) has a first fixing hole (212). A first fastener (213) is installed in the transverse hole (411) and the first fixing hole (212) to fix the first mounting body (410) on the first fixing hole (212).

5. A drag bit as defined in claim 4 wherein: The second mounting body (430) has a vertical hole (431), and the mounting platform (211) has a second fixing hole (214). A second fastener (215) is installed in the vertical hole (431) and the second fixing hole (214) to fix the second mounting body (430) on the second fixing hole (214).

6. A drag bit as defined in claim 5 wherein: The first mounting body (410) has a first oil injection hole (412) which communicates with the horizontal hole (411) and is sealed with a first sealing body. The second mounting body (430) has a second oil injection hole (432) which communicates with the vertical hole (431) and is sealed with a second sealing body.

7. A drag bit as defined in claim 2 wherein: The longitudinal section of the arc-shaped impactor (420) is circular.

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