Pangolin claw imitating drill bit with plough wall

Abstract

The invention discloses a pangolin claw imitating plough wall drill bit which comprises a drill bit roller, a bionic mechanism and a plough wall mechanism are arranged on the drill bit roller, the bionic mechanism comprises a plurality of cutting assemblies, and the multiple cutting assemblies are distributed at intervals along the surface of the drill bit roller in a spiral line mode; the cutting assembly is of a wedge-shaped structure with the round and blunt top. A cutting face and a flow guide face are arranged on the side portion of the cutting assembly, the end face of the cutting face is smooth, and the end face of the flow guide face is bent. A plurality of mounting grooves are sequentially formed in the cutting assembly from top to bottom, and cutter teeth for cutting are mounted in the mounting grooves; the plowshare mechanism comprises a plurality of curved-surface plowshares, and the curved-surface plowshares are sequentially arranged at the intersection of the cutting assembly and the drill bit roller and extend to the side face of the drill bit roller. The device has the beneficial effects that the multiple cutting assemblies can be matched to form a bionic structure similar to a pangolin claw, soil pressure can be effectively dispersed, resistance can be reduced, and the device can cope with a high-hardness rock stratum; the plow wall structure can guide the flowing direction of fragments and prevent the drill bit from being clamped.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mineral exploitation, and particularly relates to a mole claw imitated plow wall drill bit. BACKGROUND

[0002] With the development of science and technology, the exploitation of mineral resources is also expanding. In the process of coal mining, a drill bit is needed to drill holes in the coal seam to play a role in geological exploration, gas discharge and roadway support. The drill bit in the prior art is mostly a PDC drill bit (polycrystalline diamond compact), which mainly drills holes through the shearing motion of the cutting teeth on both sides. However, in the process of coal mine drilling, complex coal seams containing gangue and hard gangue are often encountered, which can easily cause the drill bit to be damaged, thereby affecting the efficiency of coal mining.

[0003] In the prior art, the design of the drill bit usually focuses on downward cutting. The friction between the debris and the drill hole is large, and the drainage efficiency is low, thereby affecting the working efficiency of the drill bit. In recent years, with the continuous improvement of bionic technology, people usually design products according to the characteristics of some animals. The mole is an animal that uses its claws to dig. The cross section of the mole claw is wedge-shaped and can split the soil with the smallest resistance. Therefore, the structure of the mole claw can be applied to the drill bit to improve the drilling efficiency of the drill bit. SUMMARY

[0004] One of the purposes of the present application is to provide a mole claw imitated plow wall drill bit that can solve at least one of the defects in the background art.

[0005] To achieve the above at least one purpose, the technical solution adopted by the present application is as follows: a mole claw imitated plow wall drill bit, comprising a drill bit roller, a bionic mechanism and a plow wall mechanism are arranged on the drill bit roller, the bionic mechanism comprises a plurality of cutting assemblies, the plurality of cutting assemblies are arranged in a spiral line along the surface of the drill bit roller at intervals, and the cutting assembly is a wedge-shaped structure with a blunt top; the side of the cutting assembly is provided with a cutting surface and a flow guide surface, the end surface of the cutting surface is gentle, and the end surface of the flow guide surface is curved; the cutting assembly is sequentially provided with a plurality of mounting grooves from top to bottom, and a cutting tooth for cutting is mounted in the mounting groove; the plow wall mechanism comprises a plurality of curved plow walls, and the plurality of curved plow walls are sequentially arranged at the intersection of the cutting assembly and the drill bit roller and extend to the side surface of the drill bit roller.

[0006] Through the above setting, the plurality of cutting assemblies can be designed into a bionic structure similar to the pangolin claw, and after the plurality of cutting assemblies are arranged in a spiral, the principle of "equal cutting depth and equal load" can be followed to ensure that the cutting load borne by each tooth is similar, a continuous cutting section is formed, and repeated cutting or omission is avoided. When the cutting assembly is in contact with the wall surface, the soil pressure can be dispersed through the wedge-shaped structure of the top round blunt, so that the teeth on the cutting assembly can split the soil with the smallest resistance, thereby improving the drilling efficiency of the drill bit; when the drill bit rotates, the cutting surface directly contacts the wall surface and plays a pressure-bearing and cutting role, and the flow guide surface can guide the debris backward through its curved characteristics, avoiding the influence of the debris on the cutting work of the teeth; the curved plow wall can further guide the debris to move backward, changing the passive flushing of the debris into active guidance, and when the drill bit rotates, the curved plow wall can do work on the debris attached thereto and push the debris to move along the curved surface.

[0007] Preferably, the cutting assembly comprises a first cutting block and a second cutting block, the first cutting block and the second cutting block are arranged alternately, and the length of the first cutting block is greater than the length of the second cutting block, the number of mounting grooves on the first cutting block is three, and the number of mounting grooves on the second cutting block is two. In this way, the first cutting block and the second cutting block arranged alternately in different lengths can cut the soil in steps, avoiding excessive load in a single cutting; in addition, the design of long and short teeth can effectively disperse the stress during cutting, improve the safety of the first cutting block and the second cutting block, and reduce the accumulation of debris to avoid the debris from jamming the drill bit.

[0008] Preferably, a debris removal channel is arranged between adjacent first cutting blocks and second cutting blocks. In this way, the debris can be removed in a specific path in time through the debris removal channel, avoiding the debris from jamming the drill bit, and in addition, the debris removal channel can also play a heat dissipation role, so that air or cooling liquid carries away the heat of the drill bit, reducing the wear of the drill bit.

[0009] Preferably, the debris removal channel is trumpet-shaped, and the channel cross section of the debris removal channel increases from top to bottom. In this way, the debris removal efficiency of the debris removal channel can be further improved, the debris can be smoothly moved along the expansion direction of the debris removal channel, and the narrow section can collect the debris and the wide section can accelerate the passage of the debris.

[0010] Preferably, the drill bit roller further comprises a flushing mechanism for cooling the cutting assembly. In this way, the flushing mechanism can deliver cooling liquid to the cutting assembly to remove the heat on the drill bit in the form of heat exchange, thereby ensuring that the drill bit can work for a long time.

[0011] Preferably, the flushing mechanism comprises water outlets arranged between adjacent cutting assemblies. In this way, cooling liquid can be added to the interior of the drill bit during operation, and the cutting assemblies can be flushed by the water outlets, which not only cools the cutting assemblies, but also simultaneously flushes away the debris, avoiding the accumulation of a large amount of debris.

[0012] Preferably, the water outlets are arranged obliquely. In this way, the cooling liquid can be directly sprayed onto the cutting assemblies through the oblique water outlets, maximizing the cooling, lubrication, and debris removal effects, and improving the cooling efficiency of the drill bit. In addition, the oblique water outlets are less likely to be blocked by debris, and the stability of the cooling liquid transmission can be maintained.

[0013] Preferably, the material of the cutting teeth comprises cemented carbide. In this way, the structural rigidity and wear resistance of the cutting teeth can be further improved.

[0014] Preferably, the lower part of the drill bit roller is provided with a connecting part, and a connecting mechanism for matching the main shaft of the drilling machine is arranged in the connecting part. In this way, the drill bit roller can be connected to the main shaft of the drilling machine through the connecting part, improving the rotation stability of the drill bit roller.

[0015] Preferably, the connecting mechanism comprises a threaded structure, and the inner wall of the connecting part and the outer wall of the main shaft of the drilling machine are provided with matching threads. In this way, the drill bit roller can be quickly installed on the main shaft of the drilling machine through the threaded structure.

[0016] Compared with the prior art, the beneficial effects of the present application are: The plurality of cutting assemblies can cooperate to form a bionic structure similar to the claws of a pangolin. After the plurality of cutting assemblies are arranged in a spiral, the "equal depth of cut, equal load" principle can be followed to ensure that each cutting tooth bears similar cutting loads, forming a continuous cutting section and avoiding repeated cutting or omission. When the cutting assembly contacts the wall, the soil pressure can be dispersed by the wedge-shaped structure at the top, allowing the cutting teeth on the cutting assembly to split the soil with minimal resistance, thereby improving the drilling efficiency of the drill bit.

[0017] The curved plow wall can guide the movement of the debris backward, changing the passive flushing of the debris to active guidance, and cooperating with the rear debris discharge channel to discharge the debris along a specific path in time, avoiding the jamming of the drill bit. During operation of the drill bit, the cooling liquid can flush the cutting assemblies through the water outlets, not only cooling the cutting assemblies, but also simultaneously flushing away the debris, reducing the accumulation of a large amount of debris. The present application has the advantages of high drilling efficiency, good stability, long service life, etc. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The structure of the drill bit in the present application is shown Figure 1 .

[0019] Figure 2 Structure of the drill bit in the present application Figure 2 .

[0020] Figure 3 Plan view of the drill bit in the present application.

[0021] Figure 4 Structure of the drill bit in the present application

[0022] In the figure: 1, cutting assembly; 11, first cutting block; 12, second cutting block; 100, drill bit roller; 101, cutting surface; 102, flow guide surface; 103, mounting groove; 2, curved plow wall; 200, cutter tooth; 3, chip removal channel; 300, water outlet hole; 4, connecting portion. DETAILED DESCRIPTION

[0023] Hereinafter, the present application will be further described in conjunction with specific embodiments, and it should be noted that the following described embodiments or technical features can be combined with each other to form new embodiments without conflict.

[0024] In the description of the present application, it should be noted that for orientation words, such as the terms "center", "transverse", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation and positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and cannot be understood as limiting the specific protection scope of the present application.

[0025] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and do not necessarily describe a specific order or sequence.

[0026] The terms "include" and "have" and any variations thereof in the specification and claims of the present application are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not have to be limited to only those steps or units clearly listed, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0027] One aspect of the present application provides a pangolin claw belt plow wall drill bit, wherein a preferred embodiment is as follows Figure 1 、 Figure 2 and Figure 3As shown, the drill bit includes a drill bit roller 100, and the drill bit roller 100 is provided with a bionic mechanism and a plow wall mechanism. The bionic mechanism is used for cutting soil, and the plow wall mechanism is used for overturning and guiding the flow of debris to prevent the drill bit from being stuck. The bionic mechanism includes a plurality of cutting assemblies 1, which can cut and punch the soil during drilling. The plurality of cutting assemblies 1 are distributed in a spiral line along the surface of the drill bit roller 100 to ensure that the plurality of cutting assemblies 1 can follow the principle of "equal cutting depth and equal load", so that each tooth 200 bears similar cutting load, forms a continuous cutting section, and avoids repeated cutting or omission. The cutting assembly 1 is provided with a plurality of installation grooves 103 from top to bottom, and the installation grooves 103 are provided with teeth 200 for cutting soil. The cutting assembly 1 is a wedge-shaped structure with a blunt top, which can disperse the soil pressure when the cutting assembly 1 contacts the wall surface, so that the teeth 200 on the cutting assembly 1 can split the soil with minimal resistance, thereby improving the drilling efficiency of the drill bit.

[0028] It should be noted that the teeth 200 in the present application are made of superhard materials, including but not limited to cemented carbide, metal ceramic and polycrystalline diamond compact, so as to improve the structural rigidity and wear resistance of the teeth 200.

[0029] Specifically, as shown in the figure, Figure 1 The side of the cutting assembly 1 is provided with a cutting surface 101 and a flow guide surface 102, and the cutting surface 101 and the flow guide surface 102 are on two opposite surfaces of the cutting assembly 1. The end surface of the cutting surface 101 is flat, similar to the palmar surface of the shrew claw. The end surface of the flow guide surface 102 is curved, similar to the dorsal surface of the shrew claw. When the drill bit rotates, the cutting surface 101 directly contacts the wall surface and plays a role of pressure bearing and cutting, and the flow guide surface 102 can guide the debris backward through its curved characteristics, avoiding the influence of the debris on the cutting work of the teeth 200.

[0030] Further, as shown in the figure, Figure 1 The plow wall mechanism includes a plurality of curved plow walls 2, which are sequentially arranged at the intersection of the cutting assembly 1 and the drill bit roller 100 and extend to the side surface of the drill bit roller 100, and can guide the debris in cooperation with the flow guide surface 102, changing the passive scouring of the debris into active guiding. When the drill bit rotates, the curved plow wall 2 can do work on the debris attached thereto and push the debris to move along the curved surface, thereby improving the discharge speed of the debris.

[0031] It can be understood that the structure of the shrew claw is arranged on the drill bit in the present application, so that the drill bit can simulate the digging action of the shrew to drill when cutting. By designing the cutting assembly 1 into a suitable geometric shape and cooperating with the rotation of the drill bit to complete the complete working chain of cutting, breaking and transporting, the working efficiency of the drill bit is improved.

[0032] In the present embodiment, as shown in Figure 2 and Figure 3 , the cutting assembly 1 comprises a first cutting block 11 and a second cutting block 12, which are alternately distributed on the drill roller 100, and the length of the first cutting block 11 is greater than that of the second cutting block 12. The number of the installation grooves 103 on the first cutting block 11 is three, and the number of the installation grooves 103 on the second cutting block 12 is two. When the drill rotates, the first cutting block 11 and the second cutting block 12 can cut the soil in steps, avoiding excessive load of single cutting; in addition, the design of long and short teeth can effectively disperse the stress during cutting, improve the safety of the first cutting block 11 and the second cutting block 12; at the same time, it can also reduce the accumulation of debris and avoid the debris from jamming the drill.

[0033] In addition, the number of the first cutting block 11 and the second cutting block 12 can be adjusted by those skilled in the art according to actual needs, as long as the first cutting block 11 and the second cutting block 12 can alternately cut the soil when the drill rotates. The specific number of the installation grooves 103 is not limited.

[0034] Further, as shown in Figure 1 and Figure 2 , in order to avoid the influence of the drill by the debris, a debris removal channel 3 is arranged between the adjacent first cutting block 11 and the second cutting block 12, which can timely remove the debris along a specific path when the drill is working, avoiding the debris from jamming the drill. In addition, the debris removal channel 3 can also play a role in heat dissipation, so that the air or cooling liquid can take away the heat of the drill, reducing the wear of the drill.

[0035] Specifically, as shown in Figure 1 and Figure 2 , the debris removal channel 3 is trumpet-shaped, and the cross section of the debris removal channel 3 increases from top to bottom, so as to improve the debris removal efficiency of the debris removal channel 3. When the drill is working, the debris can move smoothly along the expansion direction of the debris removal channel 3, realizing the collection of the debris in the narrow section and the acceleration of the debris through in the wide section.

[0036] It should be known that when the drill is running at high speed, the cutting assembly 1 will rub with the soil and generate a large amount of heat, which may cause the drill to overheat if not cooled in time, and then cause the cutting assembly 1 to deform at high temperature, affecting the working efficiency of the drill.

[0037] In view of the above problem, in some embodiments of the present application, the drill roller 100 is also provided with a flushing mechanism for discharging cooling liquid, which can transmit the cooling liquid to the surface of the cutting assembly 1 during the working process of the drill, so as to take away the heat on the drill in the form of heat exchange, thereby ensuring that the drill can work for a long time.

[0038] Specifically, as shown inFigure 3 and Figure 4 As shown, the flushing mechanism includes a water outlet 300, which is disposed between adjacent cutting components 1. When the drill bit is working, the coolant can flush the surface of the cutting component 1 through the water outlet 300, which can not only cool the cutting component 1, but also wash away the debris at the same time, reducing the accumulation of a large amount of debris.

[0039] As a supplement, to further improve the cooling effect of the coolant on the cutting assembly 1, the water outlet 300 can be set as an inclined structure to facilitate the direct spraying of coolant onto the cutting assembly 1, maximizing the cooling, lubrication, and chip removal effects. In addition, the inclined water outlet 300 is less likely to be blocked by debris, thus maintaining the stability of coolant transmission.

[0040] In this embodiment, as Figure 4 As shown, the lower part of the drill bit drum 100 is provided with a connecting part 4. The connecting part 4 contains a connecting mechanism for engaging with the drill spindle. The connecting part 4 allows connection to the drill spindle, improving the rotational stability of the drill bit drum 100. Specifically, the connecting mechanism includes, but is not limited to, threaded engagement and keyway engagement. Taking a threaded engagement as an example, the inner wall of the connecting part 4 and the outer wall of the drill spindle are provided with mating threads. The user only needs to align the drill bit drum 100 with the drill spindle and tighten the drill bit drum 100 to quickly install the drill bit drum onto the drill spindle.

[0041] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A pangolin claw imitating drag bit, characterized in that, The drill bit roller (100) is provided with bionic mechanism and plow wall mechanism. The bionic mechanism comprises a plurality of cutting assemblies (1) which are distributed along the surface of the drill bit roller (100) in a spiral line; the cutting assembly (1) is a wedge-shaped structure with a blunt top; the side of the cutting assembly (1) is provided with a cutting surface (101) and a flow guide surface (102), the end surface of the cutting surface (101) is gentle, and the end surface of the flow guide surface (102) is curved; the cutting assembly (1) is sequentially provided with a plurality of mounting grooves (103) from top to bottom, and a cutter tooth (200) for cutting is mounted in the mounting groove (103). The plow wall mechanism comprises a plurality of curved plow walls (2) which are sequentially arranged at the intersection of the cutting assembly (1) and the drill bit roller (100) and extend to the side surface of the drill bit roller (100).

2. The pangolin-clawed, gage-bit drag bit of claim 1, wherein, The cutting assembly (1) comprises a first cutting block (11) and a second cutting block (12), and the length of the first cutting block (11) is greater than the length of the second cutting block (12); the number of mounting grooves (103) on the first cutting block (11) is three, and the number of mounting grooves (103) on the second cutting block (12) is two.

3. The moleskin clawed wall plowing bit of claim 2, wherein, A chip removal channel (3) is arranged between adjacent first cutting blocks (11) and second cutting blocks (12).

4. The moleskin clawed wall plowing bit of claim 3, wherein, The chip removal channel (3) is trumpet-shaped, and the channel cross section of the chip removal channel (3) increases sequentially from top to bottom.

5. The pangolin-clawed, belt-tilled bit of claim 1 wherein, The drill bit roller (100) is also provided with a flushing mechanism for cooling the cutting assembly (1).

6. The moleskin clawed wall plowing bit of claim 5, wherein, The flushing mechanism comprises a water outlet hole (300) which is arranged between adjacent cutting assemblies (1).

7. The moleskin clawed wall plowing bit of claim 6 wherein, The water outlet hole (300) is arranged obliquely.

8. The pangolin-clawed, belt- tilling, wall- boring bit of claim 1, wherein, The material of the cutter tooth (200) comprises hard alloy.

9. The pangolin-clawed, belt-tread, wall-imitating bit of claim 1, wherein, The lower part of the drill bit roller (100) is provided with a connecting part (4) which is provided with a connecting mechanism for cooperating with the main shaft of the drilling machine.

10. The moleskin clawed wall-plied bit of claim 9 wherein, The connecting mechanism comprises a threaded structure, and the inner wall of the connecting part (4) and the outer wall of the main shaft of the drilling machine are provided with threads which cooperate with each other.

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