CN114622834A - Anti-bending rock drilling tool, rock drill and rock drilling trolley - Google Patents

Abstract

The present disclosure relates to a fracture-resistant rock drilling tool, a rock drill and a rock drilling trolley. The anti-breaking rock drilling tool comprises a drill rod, a drill bit and a buffer part; the drill bit comprises an end part for chiseling, a hollow structure is arranged on one side, away from the end part, of the drill bit, the hollow structure comprises an internal thread section and an internal support section, and the internal support section is arranged on one side, away from the end part, of the internal thread section; the drill rod comprises an external thread section and an external support section; the drill bit and the drill rod are in threaded fit connection through an internal thread section and an external thread section, and in a fit and screwed state of the drill rod and the drill bit, a gap is formed between the inner wall of the inner support section and the outer wall of the outer support section; because the buffer part is arranged in the gap, the impact force during contact is further effectively reduced, the fracture condition of the whole rock drilling drill tool is obviously improved, the time cost and the economic cost for replacing the drill tool are saved, and the construction progress is greatly accelerated.

Description

Anti-bending rock drilling tool, rock drill and rock drilling trolley

Technical Field

The present disclosure relates generally to the fields of water conservancy, hydropower, nuclear power, roads, traffic, mining, and the like, and particularly to an anti-fracture rock drilling tool, a rock drill, and a rock drilling jumbo.

Background

Rock drills are tools used to directly mine rock material and drill blastholes into rock formations to deposit explosives to blast the rock and thereby complete the mine of rock material or other rock work. Furthermore, rock drills may also be used as breakers for breaking hard layers such as concrete. The rock drilling tool used by rock drill is generally called drill tool, the rock drilling tool is the most severe service condition and the shortest service life in all running machines, and the rock drilling tool bears various composite external loads such as torsion, bending, stretching, extrusion and the like besides high-frequency impact.

Under the normal working condition, the main cause of the failure of the drill tool is impact fatigue fracture, and through analysis, the main causes of the fracture are as follows: 1) because the tool withdrawal groove is formed at the ending part of the internal thread, the drill bit wall corresponding to the tool withdrawal groove is thinner and weaker in strength, and stress is usually concentrated at the intersection of the tool withdrawal groove and the threaded blind hole, the drill bit is easy to break at the intersection of the threaded blind hole and the tool withdrawal groove; 2) because the stress is mostly concentrated at the ending part of the external thread of the drill rod, the drill rod is easy to break at the ending part of the external thread when being subjected to the action of bending moment. The drill tool is frequently broken and fails, the service life of the drill tool is seriously shortened, a large amount of time is wasted, and the overall progress of the project is influenced.

Disclosure of Invention

In view of the above-mentioned defects, the present invention aims to provide a fracture-resistant rock drilling tool, a rock drill for mounting the rock drilling tool, and a rock drill jumbo, which reduce the contact stress between the drill bit and the drill rod, have long service life and high efficiency, and are not easy to fracture.

According to a first aspect of an embodiment of the present disclosure, there is provided a fracture-resistant rock drilling tool comprising a shank, a bit and a buffer member; the drill bit comprises an end part for chiseling, a hollow structure is arranged on one side, away from the end part, of the drill bit, the hollow structure comprises an internal thread section and an internal support section, and the internal support section is arranged on one side, away from the end part, of the internal thread section; the drill rod comprises an external thread section and an external support section; the drill bit and the drill rod are in threaded fit connection through an internal thread section and an external thread section, and in a fit and screwed state of the drill rod and the drill bit, a gap is formed between the inner wall of the inner support section and the outer wall of the outer support section; the buffer component is arranged in the gap formed by the inner wall of the inner support section and the outer wall of the outer support section, and the thickness of the buffer component is smaller than or equal to the distance between the inner wall of the inner support section and the outer wall of the outer support section.

In one embodiment, the buffer member includes an elastic member made of an elastic material.

In an embodiment, the cushioning component further comprises a wear layer disposed inside and/or outside the resilient assembly.

In one embodiment, the buffering component is fixedly arranged on the inner wall of the inner supporting section, the inner surface of the buffering component is a conical surface, and the outer wall of the outer supporting section is a cylindrical surface or a conical surface.

In one embodiment, the buffering component is fixedly arranged on the outer wall of the outer supporting section, the outer surface of the buffering component is a conical surface, and the inner wall of the inner supporting section is a cylindrical surface or a conical surface.

In one embodiment, the buffer component is fixedly arranged on the outer wall of the outer support section and the inner wall of the inner support section, the inner surface and/or the outer surface of the buffer component is a conical surface, and the outer wall of the outer support section and the inner wall of the inner support section are matched with the buffer component in shape.

In one embodiment, the tapered surface is a single-segment tapered surface or a multi-segment tapered surface, and the diameter of the tapered surface increases along the side away from the end portion.

In one embodiment, the clearance between the drill rods is 0.3mm-5mm and the thickness of the cushioning member is 0.3mm-5 mm.

According to a second aspect of an embodiment of the present disclosure there is provided a rock drilling machine comprising an anti-break rock drilling tool as described in any one of the preceding embodiments.

According to a third aspect of embodiments of the present disclosure there is provided a rock drilling rig comprising a rock drilling machine as described in any one of the preceding embodiments.

Due to the adoption of the technical scheme, the invention has the following advantages:

the anti-bending rock drilling tool provided by the invention has the advantages that in the state that the drill rod and the drill bit are matched and screwed, the inner wall of the inner support section is in clearance with the outer wall of the outer support section, so that the direct contact between the drill rod and the drill bit is avoided, only when the rock drilling tool works, the outer wall of the outer support section which is subjected to force bending deformation of the drill rod is in contact with the inner wall of the inner support section of the drill bit, therefore, the anti-bending capability of the whole rock drilling tool is obviously enhanced, the contact stress is obviously weakened, meanwhile, because the buffer part is arranged in the clearance, the impact force during contact is further effectively reduced, the fracture condition of the whole rock drilling tool is obviously improved, the probability of bending the drill rod is reduced, the service life of the drill rod is prolonged, the time cost and the economic cost for replacing the drill bit are saved, and the construction progress is greatly accelerated.

Drawings

The above and other objects, features and advantages of the embodiments of the present disclosure will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the present disclosure are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which:

fig. 1 shows a schematic structural diagram of a drill bit provided by an embodiment of the invention.

Fig. 2 shows a schematic structural diagram of a drill rod provided by an embodiment of the invention.

Fig. 3 shows a schematic view of a drill bit and a drill rod according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram illustrating a cushioning member according to an embodiment of the present invention.

Fig. 5 illustrates a cross-sectional view of a cushioning component provided by an embodiment of the present invention.

Fig. 6 is a sectional view showing a buffer member according to another embodiment of the present invention.

In the drawings, the same or corresponding reference numerals indicate the same or corresponding parts.

Detailed Description

The principles and spirit of the present invention will be described with reference to several exemplary embodiments. It is understood that these embodiments are given only to enable those skilled in the art to better understand and to implement the present invention, and do not limit the scope of the present invention in any way.

It should be noted that, although the expressions "first", "second", etc. are used herein to describe various modules, steps, data, etc. of the embodiments of the present invention, the expressions "first", "second", etc. are only used to distinguish between the various modules, steps, data, etc. and do not indicate a particular order or importance. Indeed, the terms "first," "second," and the like are fully interchangeable.

It should be noted that although expressions such as "front", "back", "left", "right", "top", "bottom", "outside", "inside" and the like are used herein to describe different directions or sides of embodiments of the invention, the expressions such as "front", "back", "left", "right", "top", "bottom", "outside", "inside" and the like are merely for distinguishing between different directions or sides, and do not denote a particular outside or inside. Indeed, the terms "front," "back," "left," "right," "top," "bottom," "outer," "inner," and the like may, in some instances, be used interchangeably.

In the related art, the drill tool is mainly applied to a rock drill, and the rock drill generally comprises an impact mechanism, a drill rotating mechanism, a chip removal mechanism, a lubricating mechanism and the like. The drill tool generally comprises a drill rod, a drill bit, a connecting sleeve and a drill bit shank; the drill bit shank is generally provided with a spline and is used for being connected with a rotating sleeve of the rock drill, and the drill bit shank is generally inserted into the rotating sleeve of the rock drill, so that impact energy, rotary torque and flushing medium are transmitted to the drill rod and the drill bit through the spline; the drill rod is a hollow long rod, a hollow pipeline is used as a channel, holes are formed in the periphery of the drill rod tail and communicated with the drill rod, and water or a flushing liquid medium is introduced into the drill rod; the front section of the drill rod is connected with a drill bit, and the drill bit is provided with a water channel which is communicated with a channel of the drill rod and used for eliminating dust generated in the operation process; in the process of chiseling the rock wall, water or a flushing liquid medium passes through the drill rod from the drill shank and is finally sprayed out of a water channel of the drill bit, so that the temperature of the drill tool is reduced, and rock fragments, dust and the like generated by chiseling the rock wall are flushed outwards, and the smooth operation of rock drilling is ensured; the drill bit material is the foundation for ensuring the quality of the drill bit, mainly comprises steel, hard alloy and other materials, and the front end of the drill bit is generally provided with a plurality of hard alloy blocks; the drill rod can be made of bainite steel, 30-35SiMnMoV alloy steel and the like, when the rock drill drills a rock wall, power is transmitted to the drill bit through the drill rod, and the power comprises drilling power in the axial direction of the drill rod and rotating power rotating along the axis of the drill rod. The pressure of the chiseling can be 10-30Mpa, the frequency can be more than or equal to 35Hz, and the rotating speed can be more than or equal to 150 r/min; in this process, the drill rod is not only subjected to the power output of the rock drill, but also to the reaction force transmitted from the rock through the drill bit; the strength, surface stress, working pressure, quality and the like of the drill rod all affect the rock drilling effect and the service life; in some related technologies, the top end of a drill bit is columnar and annular, the outer diameter of the top end is larger than that of a drill rod, the diameter of a joint of the drill bit and the drill rod is changed greatly, the stress concentration phenomenon occurs at the joint of the drill bit and the drill rod, and the drill rod is easy to break at the stress concentration part of reducing during operation.

To solve the above problems, as shown in fig. 1 to 6, a fracture-resistant rock drilling tool according to the present invention may include: a drill bit 1, a drill rod 2 and a buffer component 3; the drill bit 1 can comprise an end part for chiseling, wherein one side, which is far away from the end part, is provided with a hollow structure, the hollow structure comprises an internal thread section 4 and an internal support section 5, and the internal support section 5 is arranged on one side, which is far away from the end part, of the internal thread section 4; the drill rod 2 comprises an external thread section 6 and an external support section 7; wherein, the drill rod 1 is connected with the drill rod 2 through the thread matching of the internal thread section 4 and the external thread section 6, and in the matching and tightening state of the drill rod 2 and the drill rod 1, the inner wall of the internal support section 5 and the outer wall of the external support section 7 have a gap; the buffer component 3 is arranged in a gap formed by the inner wall of the inner support section 5 and the outer wall of the outer support section 7, and the thickness of the buffer component 3 is smaller than or equal to the distance between the inner wall of the inner support section 5 and the outer wall of the outer support section 7. The drill rod is a hollow long rod-shaped component, the external thread section is provided with external threads and is positioned at one end of the drill rod for connecting a drill bit, wherein the external threads can be threads formed on the peripheral side surface of the drill rod in a turning mode and the like; the outer supporting section is positioned in the direction of the outer thread section far away from the drill bit and is formed on the peripheral side surface of the drill rod; in the disclosure, the drill bit may be a sleeve-shaped component with an outer end surface provided with cemented carbide, the outer end surface may be provided with a cemented carbide block for chiseling a rock wall by means of embedding or the like, an inner thread section is provided inside, the inner thread section is provided corresponding to an outer thread section of the drill rod, the inner thread section forms an inner thread matching with the outer thread of the drill rod, and the length of the inner thread section in the axial direction of the drill rod may be equal to or less than the length of the outer thread section; the external thread is matched with the internal thread, and the drill bit and the drill rod are fixedly connected by screwing; the tail end of the outer end face of the drill bit can be provided with an inner supporting section, and the inner supporting section extends from the inner thread section to the tail end along the peripheral side wall of the drill bit; under the state that the external thread of the drill rod and the internal thread of the drill bit are screwed, the inner supporting section and the outer supporting section are arranged at intervals to form a gap; the drill tool also comprises a buffer part, wherein the buffer part is integrally in an annular structure and is arranged in a gap between the drill rod outer support section and the drill bit inner support section; during the assembling process, the buffer part can be sleeved on the outer support section of the drill rod and is in sliding or fixed connection with the outer support section of the drill rod, and then the drill bit and the drill rod are screwed tightly; or the buffer part is arranged in the inner support section and is contacted with or fixedly connected with the inner support section of the drill bit, and then the drill rod and the drill bit are screwed tightly; in the state that the drill bit and the drill rod are screwed, a gap can exist between the buffer part and the inner surface of the inner support section of the drill bit; a gap can also exist between the outer surface of the drill rod outer support section and the drill rod; there may also be a gap between a portion of the cushioning member and the inner surface of the inner support section of the bit and a gap between the portion of the cushioning member and the outer surface of the outer support section of the shank; or the buffer component can be simultaneously kept in contact with the inner surface of the inner support section and the outer surface of the drill rod outer support section; the buffer component is used for buffering the impact force of the connection part of the drill rod and the drill bit when the drill rod is stressed to swing in the rock drilling process, relieving the stress concentration condition and playing a certain supporting role at the outer side of the drill rod. The drill rod and the drill bit are in a matched and screwed state, a gap with a certain distance is reserved between the inner wall of the inner supporting section and the outer wall of the outer supporting section, so that the direct contact between the drill rod and the drill bit is avoided, the bending resistance of the whole rock drilling drill tool is effectively enhanced, the contact stress is obviously reduced, and meanwhile, because the buffer part is arranged in the gap, the impact force when the drill bit is in contact with the drill rod is buffered, the impact force when in contact is further effectively reduced, the fracture probability of the whole rock drilling drill tool is reduced, and the time cost and the economic cost are saved.

In some embodiments of the present disclosure, the cushioning component may include an elastic member, and the elastic member is made of an elastic material. The elastic material can contract and deform when being subjected to pressure, so that the pressure is buffered, the instantaneous impact force is reduced, and meanwhile, the deformation can increase a certain contact area, so that the local pressure intensity is reduced, and the condition of stress concentration is avoided; and when the pressure is removed, the elastic material can restore the original shape. In the embodiment of the disclosure, the elastic material is applied to the drill tool of the rock drill, and the drill rod moves at high frequency in the rock drilling process and rotates along with axial reciprocating impact and circumferential rotation, so that the elastic component is required to have elastic restoring force so as to meet the requirement of rapid pressure; the elastic components can be formed on the local part of the buffer component, the elastic components are arranged at a plurality of positions around the circumferential side of the annular buffer component, the pressure can be dispersed by arranging the elastic components at a plurality of points on the circumferential side, and the elastic components can be fully deformed when arranged at intervals; in other embodiments, the elastic assembly may also be formed in an annular band shape on the buffer component, and the band-shaped elastic assembly surrounding the buffer component for one circle can ensure that the buffer effect can be ensured at each circumferential side position; in other embodiments, the elastic component can be formed on the peripheral side surface of the whole buffer component in a sheet shape or the whole buffer component is made of an elastic material, so that the buffer uniformity is ensured to the maximum extent; the elastic component is adopted to reduce the contact stress to the drill bit when the drill rod is bent during rock drilling operation and reduce the probability of breakage, the elastic material can specifically adopt rubber, polyurethane, polycarbonate and TP, the buffer part adopting an annular structure is better matched with the structures of the drill bit and the drill rod, and the contact stress is reduced in an all-round and multi-angle mode.

In some embodiments of the present disclosure, the cushioning component may further include a wear layer disposed on an inner side and/or an outer side of the elastomeric component. In the embodiment of the disclosure, the wear-resistant layer can be made of metal materials or nonmetal materials, and can adapt to the working process of powerful torsion and impact generated during rock drilling. The wear-resistant layer can be arranged on the inner side of the elastic component, namely on the side close to the outer support section of the drill rod; the elastic component can also be arranged at the outer side of the elastic component, namely the side close to the inner support section of the drill bit; it may also be provided both on the inside and outside of the elastic component. According to the working process of the rock drill, the power comprises the chiseling power of the drill rod in the axial direction and the rotating power rotating along the axis of the drill rod, therefore, in the rock drilling process, the buffer component inevitably receives the friction force from the drill bit and the drill rod, the appearance structure of the buffer component is seriously damaged under long-term use, the elastic performance and the using effect of the buffer component are influenced, the wear-resistant layer is arranged to bear the generated friction force earlier than the elastic component, and the wear-resistant layer can be arranged on the inner side and/or the outer side of the elastic component according to the installation mode and the structure of the elastic component to prevent excessive mechanical friction by adopting the wear-resistant layer, so that the service life of the buffer component is prolonged, and the using performance of the elastic component is ensured.

In some embodiments of the present disclosure, the buffering component may be fixedly disposed on an inner wall of the inner supporting section, an inner surface of the buffering component is a conical surface, and an outer wall of the outer supporting section is a cylindrical surface or a conical surface. The buffering component is arranged on the inner supporting wall, namely the buffering component is arranged on the drill bit, and at the moment, when the drill rod is bent in the rock drilling operation, the drill rod can be in contact with the buffering component on the drill bit, the inner surface of the buffering component is set to be a conical surface, and the impact force can be relieved when the buffering component is in contact with the cylindrical surface or the conical surface of the outer supporting section outer wall.

In some embodiments of the present disclosure, the buffering component may be fixedly disposed on the outer wall of the outer supporting section, the outer surface of the buffering component is a conical surface, and the inner wall of the inner supporting section is a cylindrical surface or a conical surface. The buffer part is arranged on the outer wall of the outer support, namely the buffer part is arranged on the drill rod, at the moment, when the drill rod is bent during rock drilling operation, the buffer part on the drill rod can be contacted with the drill bit, the outer surface of the buffer part is designed into a conical surface, and the impact force can be relieved when the buffer part is contacted with the cylindrical surface or the conical surface of the inner wall of the inner support section.

In some embodiments of the disclosure, the buffer member may be fixedly disposed on the outer wall of the outer support section and the inner wall of the inner support section, the inner surface and/or the outer surface of the buffer member is a conical surface, and the outer wall of the outer support section and the inner wall of the inner support section are adapted to the shape of the buffer member. The buffer parts are arranged on the outer wall of the outer support section and the inner wall of the inner support section, namely the buffer parts are respectively arranged on the drill bit and the drill rod, at the moment, when the drill rod is bent, the buffer parts on the drill rod can be contacted with the buffer parts on the drill bit, the inner surface and the outer surface of the buffer parts are conical surfaces, and the impact force can be relieved when the buffer parts are contacted with the cylindrical surface or the conical surface of the outer wall of the outer support section, so that the direct contact between the drill bit and the drill rod is avoided, and the abrasion loss of the drill bit and the drill rod can be effectively reduced.

Compared with a plane with a constant diameter, the conical surface can better provide a strong support for the contact of the drill bit and the drill rod, when the drill bit and the drill rod are in an initial state, after the drill bit and the drill rod are connected and fixed through threads, a gap can be reserved between the outer support section of the drill rod and the inner support section of the drill bit, after the drill tool starts to operate, the impact and rotation power can enable the drill rod to generate bending deformation, further the drill rod and the drill bit can be contacted at a certain position to generate contact stress, compared with direct contact, the contact after displacement is greatly reduced, meanwhile, after a buffer component is further used, the speed of the displacement of the drill rod can be reduced to play a role of buffering, the first contacted part is positioned at the position most far away from the end part of the drill bit at the outer support section of the drill rod and the inner support section of the drill bit, therefore, the buffer component is fixedly arranged on the inner wall of the inner support section, the inner surface of the buffer component is a conical surface, the outer wall of the outer support section is a cylindrical surface or a conical surface, or, the buffer part is fixedly arranged on the outer wall of the outer support section, the outer surface of the buffer part is a conical surface, the inner wall of the inner support section is a cylindrical surface or a conical surface, or the buffer part is fixedly arranged on the outer wall of the outer support section and the inner wall of the inner support section, the inner surface and/or the outer surface of the buffer part is a conical surface, the outer wall of the outer support section and the inner wall of the inner support section are matched with the buffer part in shape, so that buffer force can be provided for the contact between the drill rod and the drill bit at the first time from one side or two sides, the above fixing modes can adopt the modes of thread fixing, bonding fixing, welding fixing, riveting fixing or annular sleeving the outer wall of the outer support section in a semi-annular mode, and the like, the conical surface transition is adopted, the structural strength of the whole drill tool is integrally increased, meanwhile, the buffer space for contact is increased, and a certain correction effect is also generated on the bending of the drill rod.

Under the state that the buffering component is arranged on the inner wall of the inner supporting section, a gap is reserved between the buffering component and the drill rod, the inner surface of the buffering component is a conical surface, meanwhile, a wear-resistant layer is further arranged outside the inner surface, under the state that the buffering component is arranged on the outer wall of the outer supporting section, a gap is reserved between the buffering component and the drill bit, the outer surface of the buffering component is a conical surface, meanwhile, a wear-resistant layer is further arranged outside the outer surface, under the state that the buffering component is arranged on the outer wall of the outer supporting section and the inner wall of the inner supporting section, the inner surface and/or the outer surface of the buffering component is a conical surface, a wear-resistant layer is further arranged outside the outer surface of the buffering component arranged on the outer wall of the outer supporting section and the inner surface of the buffering component arranged on the inner wall of the inner supporting section, the service life of the buffering component is prolonged by arranging the wear-resistant layer, and the replacement time is also saved.

In some embodiments of the present disclosure, the tapered surface may be a single-segment tapered surface or a multi-segment tapered surface, and the diameter of the tapered surface increases along a side facing away from the end portion. From the angle of increasing drilling tool structural strength, reducing the contact, further optimized the structure of conical surface, effectively improved the result of use.

In some embodiments of the disclosure, the clearance between the bit and the shank support surface may be 0.3mm to 5mm, and the thickness of the cushioning member may be 0.3mm to 5 mm. The distance between the drill bit and the drill rod directly influences the probability of the fracture of the drill tool, the distance is too small, the contact between the drill bit and the drill rod can be caused by slight vibration, the function of buffering the bending force cannot be effectively realized, the buffer significance is lost due to too large distance, too large space is reserved for the bending of the drill rod, the bending degree of the drill rod is increased, and the drill rod is more easily fractured, therefore, the distance between the drill bit and the drill rod supporting surface is in a reasonable range, and through scientific observation and analysis tests, the distance is set to be 0.3mm-5mm, so that the phenomenon that the buffering force is too small due to too small distance and the drill rod is too bent due to too large distance is avoided, meanwhile, the thickness of the buffer component is set to be 0.3mm-5mm based on the action principle of the buffer component, and the defect that adhesion occurs between the inner conical surface and the outer conical supporting surface in the impact process is further effectively overcome.

Based on the same concept, the invention also provides a rock drilling machine, which is provided with the anti-breaking rock drilling tool of any embodiment of the first aspect. The main mechanism of the rock drill is an impact hammer which does repeated movement in the cylinder body, under the action of air pressure and hydraulic pressure, the impact hammer continuously impacts the tail end of a drill bit tail of a drill tool, each time the impact hammer impacts the rock to a certain depth to form a dent, the rock at the dent is crushed, when the impact hammer returns to the stroke, under the action of a drill rod rotating mechanism of the rock drill, the drill tool rotates for a certain angle and then impacts the drill bit tail again, the process is repeated, meanwhile, the drill tool continuously drills forward, the generated powder is continuously and timely removed, otherwise, a drill bit cannot effectively work, a drill bit group can be clamped, the rock drill cannot normally work, normal production is influenced, and the human health can be greatly injured, therefore, the rock drill is also provided with a powder removing structure, and for the whole rock drill, the core mechanism of the rock drill lies in a drill rod and a drill bit of the impact mechanism, by adopting the anti-bending rock drilling tool in any embodiment of the first aspect, the usability of the rock drilling machine is improved, the higher use strength can be kept under the action of high strength and long time, and the working efficiency is improved.

Based on the same concept, the invention also provides a rock drilling trolley which is provided with the rock drilling machine of the embodiment of the second aspect. The rock drilling jumbo fixes the rock drill on the track frame, provide the axial driving force to make the rock drill move along the track frame through the propeller, thus carry on the rock drilling operation, can include rock drill, propulsion system, positioning system and track frame, on the basis of the need to producing quality improvement, the mechanization degree of the rock drilling jumbo is better, in the particular job scene, can meet the production need better, the rock drilling jumbo of the invention can be open-air rock drilling jumbo, underground rock drilling jumbo.

In the practical application process, the rock drilling tool is subjected to impact force and rotary force from a rock drill, when a drill bit is contacted with a rock body to crush the rock body to form a hole, the outer support section of the drill rod or a buffer component on the outer support section of the drill rod can be bent under the action of bending moment, and after the gap distance between the inner wall of the inner support section and the outer wall of the outer support section is changed, the drill rod is contacted with the inner support surface or the buffer component on the inner support surface according to the arrangement mode of the buffer component, so that the direct contact between the drill rod and the drill bit is avoided, the bending resistance of the whole rock drilling tool is effectively enhanced, and the contact stress is remarkably reduced.

It will be understood that the present disclosure is not limited to the precise arrangements that have been described above and illustrated in the drawings, and that various modifications and changes may be made without departing from the scope thereof, which is limited only by the claims appended hereto.

The foregoing description of the implementation of the invention has been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise form disclosed, and modifications and variations are possible in light of the above teachings or may be acquired from practice of the invention. The embodiments were chosen and described in order to explain the principles of the invention and its practical application to enable one skilled in the art to utilize the invention in various embodiments and with various modifications as are suited to the particular use contemplated.

Although operations are depicted in the drawings in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in serial order, or that all illustrated operations be performed, to achieve desirable results. In certain environments, multitasking and parallel processing may be advantageous.

The methods and apparatus of the present disclosure can be accomplished with standard programming techniques with rule-based logic or other logic to accomplish the various method steps. It should also be noted that the words "means" and "module," as used herein and in the claims, is intended to encompass implementations using one or more lines of software code, and/or hardware implementations, and/or equipment for receiving inputs.

Any of the steps, operations, or procedures described herein may be performed or implemented using one or more hardware or software modules, alone or in combination with other devices. In one embodiment, the software modules are implemented using a computer program product comprising a computer readable medium containing computer program code, which is executable by a computer processor for performing any or all of the described steps, operations, or procedures.

The foregoing description of the implementations of the disclosure has been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the disclosure to the precise form disclosed, and modifications and variations are possible in light of the above teachings or may be acquired from practice of the disclosure. The embodiments were chosen and described in order to explain the principles of the disclosure and its practical application to enable one skilled in the art to utilize the disclosure in various embodiments and with various modifications as are suited to the particular use contemplated.

Claims (10)

1. An anti rock drilling tool that rolls over which is characterized in that: comprises a drill bit (1), a drill rod (2) and a buffer component (3); the drill bit (1) comprises an end part for chiseling, a hollow structure is arranged on one side, away from the end part, of the drill bit, the hollow structure comprises an internal thread section (4) and an internal support section (5), and the internal support section (5) is arranged on one side, away from the end part, of the internal thread section (4); the drill rod (2) comprises an external thread section (6) and an external support section (7); the drill bit (1) is connected with the drill rod (2) through the thread matching of an internal thread section (4) and an external thread section (6), and in the matching and screwing state of the drill rod (2) and the drill bit (1), the inner wall of the internal support section (5) and the outer wall of the external support section (7) have a gap; the buffer component (3) is arranged in the gap formed by the inner wall of the inner support section (5) and the outer wall of the outer support section (7), and the thickness of the buffer component (3) is smaller than or equal to the distance between the inner wall of the inner support section (5) and the outer wall of the outer support section (7).

2. A fracture-resistant rock drilling tool as claimed in claim 1, wherein: the buffer part (3) comprises an elastic component, and the elastic component is made of elastic materials.

3. A fracture-resistant rock drilling tool as claimed in claim 2, wherein: the buffer part (3) further comprises a wear-resistant layer, and the wear-resistant layer is arranged on the inner side and/or the outer side of the elastic component.

4. A fracture-resistant rock drilling tool as claimed in claim 1, wherein: the buffer component (3) is fixedly arranged on the inner wall of the inner support section (5), the inner surface of the buffer component (3) is a conical surface, and the outer wall of the outer support section (7) is a cylindrical surface or a conical surface.

5. A fracture-resistant rock drilling tool as claimed in claim 1, wherein: the buffer component (3) is fixedly arranged on the outer wall of the outer support section (7), the outer surface of the buffer component (3) is a conical surface, and the inner wall of the inner support section (5) is a cylindrical surface or a conical surface.

6. A fracture-resistant rock drilling tool as claimed in claim 1, wherein: the buffer component (3) is fixedly arranged on the outer wall of the outer support section (7) and the inner wall of the inner support section (5), the inner surface and/or the outer surface of the buffer component (3) are conical surfaces, and the outer wall of the outer support section (7) and the inner wall of the inner support section (5) are matched with the buffer component (3) in shape.

7. A fracture-resistant rock drilling tool according to any one of claims 4 to 6, wherein: the conical surface is a single-section conical surface or a multi-section conical surface, and the diameter of the conical surface is increased along one side departing from the end part.

8. A fracture-resistant rock drilling tool as claimed in claim 1, wherein: the clearance between the drill bit (1) and the drill rod (2) is 0.3mm-5mm, and the thickness of the buffer part is 0.3mm-5 mm.

9. A rock drill comprising an anti-break rock drill tool as claimed in any one of claims 1 to 8.

10. A rock drilling rig, characterized in that it comprises a rock drilling rig according to claim 9.

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