CN220319464U - Reverse circulation cone impactor - Google Patents

Abstract

The application discloses reverse circulation cone impactor includes: the front end of the impactor body is provided with a drill rod clamping sleeve; the drill bit tail handle is sleeved in the drill bit clamping sleeve, a high-pressure air passage is arranged between the outer wall of the drill bit tail handle and the inner wall of the drill bit clamping sleeve, and a central passage is arranged along the axial direction of the drill bit tail handle; the roller bit is connected with the front end of the bit tail handle, a slag discharging port is arranged on the working end face of the roller bit, and the slag discharging port is connected with the slag discharging channel component of the central channel. Compared with the prior art, the reverse circulation roller cone impactor provided by the application can prevent rock slag from blocking, has a good slag discharging effect and is higher in drilling efficiency.

Description

Reverse circulation cone impactor

Technical Field

The application relates to the technical field of impactor design and manufacturing, in particular to a reverse circulation cone impactor.

Background

The roller bit is the most widely used drilling bit, cutting teeth alternately contact the bottom of a well when the roller bit works, the rock breaking torque is small, the contact area between the cutting teeth and the bottom of the well is small, the specific pressure is high, the stratum is easy to be penetrated, the total length of a working blade is large, and therefore abrasion is relatively reduced; on the other hand, roller cone drill bits crush and bite rock under weight on bit and rotation of the drill string, while producing some slip to shear the rock. When the cone rolls at the bottom of the well, teeth on the cone sequentially impact and press into the stratum, the effect can crush part of the rock at the bottom of the well, and meanwhile, the other part of the rock remained among the teeth is cut off by the shearing effect brought by sliding of the cone, so that the rock at the bottom of the well is crushed comprehensively, and the well hole is extended. Roller cone drill bits are capable of accommodating a wide variety of formations ranging from soft to hard.

The hammer is connected with the drill bit, the piston continuously reciprocates in the outer cylinder by continuously changing the exhaust direction, the drill bit is continuously and repeatedly impacted by the piston, at present, the cone hammer basically adopts two sides for deslagging, high-pressure gas enters the outer cylinder to realize the reciprocating impact of the piston and then enters a slag blowing channel and a slag blowing pore canal in the central axial direction of the cone drill bit to blow broken rock slag out of the side face of the cone drill bit. However, when a broken rock stratum, a karst cave or an underground river is constructed, high-pressure gas cannot completely blow out rock slag from the side face of the roller bit, the slag discharging effect is poor, and the drill bit is blocked in a drilled hole when being lifted up seriously.

Therefore, a reverse circulation cone impactor is needed, which can prevent rock slag from blocking, has good slag discharging effect and has higher drilling efficiency.

Disclosure of Invention

For solving above-mentioned technical problem, this application provides a reverse circulation cone impactor, can prevent that rock sediment from blockking up, and it is effectual to arrange sediment, and drilling efficiency is higher.

The technical scheme provided by the application is as follows:

a reverse circulation cone impactor comprising:

the front end of the impactor body is provided with a drill rod clamping sleeve;

the drill bit tail handle is sleeved in the drill bit clamping sleeve, a high-pressure air passage is arranged between the outer wall of the drill bit tail handle and the inner wall of the drill bit clamping sleeve, and a central passage is arranged along the axial direction of the drill bit tail handle;

the roller bit is connected with the front end of the bit tail handle, a slag discharging port is arranged on the working end face of the roller bit, and the slag discharging port is connected with the slag discharging channel component of the central channel.

Preferably, the method further comprises:

the positioning shaft shoulder is arranged on the outer wall of the drill rod clamping sleeve;

the wear-resisting sleeve is sleeved on the outer side of the drill clamping sleeve, and a positioning boss matched with the positioning shaft shoulder is arranged on the inner wall of the wear-resisting sleeve.

Preferably, the method comprises the steps of,

the wear-resisting sleeve is provided with a slag blowing channel communicated with the high-pressure air channel between the wear-resisting sleeve and the drill bit tail handle, and the outer diameter of the wear-resisting sleeve is smaller than the maximum diameter of the roller bit, so that rock slag is discharged from the slag discharging port through the slag discharging channel component.

Preferably, the method further comprises:

the support assembly is arranged between the drill bit tail handle and the wear-resistant sleeve, and comprises at least two support blocks which are uniformly arranged at intervals around the circumference of the drill bit tail handle.

Preferably, the support components are at least provided with two groups, and are arranged at intervals along the axial direction of the drill shank.

Preferably, the slag discharging holes are at least provided with two groups, and are arranged on the working end face of the roller bit at intervals.

Preferably, the slag discharging passage assembly includes:

a first channel coaxially disposed with the central channel;

a second channel communicating the first channel with the slag discharge port;

and the slag collecting sleeve is arranged on the inner wall of the second channel.

Preferably, the slag discharging passage assembly further comprises:

the mounting groove is arranged in the second channel and used for placing the slag collecting sleeve;

one end of the slag collecting sleeve is contacted with the bottom surface of the mounting groove, and one end of the slag collecting sleeve, which is far away from the drill bit tail handle, is positioned through a clamp spring.

Preferably, the bit shank is detachably connected with the roller bit.

Preferably, the bit tail handle is connected with the roller bit through conical threads.

The utility model provides a reverse circulation cone impactor, which comprises an impactor main body, a bit tail handle and a cone bit, wherein a drill clamping sleeve is arranged at the front end of the impactor main body, the bit tail handle is sleeved in the drill clamping sleeve, a high-pressure air passage is arranged between the outer wall of the bit tail handle and the inner wall of the drill clamping sleeve, a central passage is arranged along the axial direction of the bit tail handle, the cone bit is connected with the front end of the bit tail handle, a slag discharging port is arranged on the working surface of the cone bit, a slag discharging passage component is arranged in the cone bit and is used for communicating the slag discharging port and the central passage, and waste gas generated during operation of the reverse circulation impactor is discharged through the high-pressure air passage.

Compared with the cone impacter in the prior art, the reverse circulation cone impacter in the embodiment of the utility model changes the exhaust gas discharge and the rock slag discharge paths, can prevent the rock slag from being blocked, has good slag discharge effect and higher drilling efficiency.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a reverse circulation cone impactor according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a reverse circulation cone impactor according to an embodiment of the present utility model;

FIG. 3 is a schematic diagram of a roller cone drill bit according to an embodiment of the present utility model;

fig. 4 is a schematic structural view of a drill shank according to an embodiment of the present utility model;

FIG. 5 is a cross-sectional view of B-B provided by an embodiment of the present utility model;

FIG. 6 is a cross-sectional view of a C-C provided by an embodiment of the present utility model.

Reference numerals: 2. a drill rod clamping sleeve; 3. a drill bit tail handle; 4. a high pressure airway; 5. a central passage; 6. roller cone drill bit; 7. a slag discharge channel assembly; 8. a wear-resistant sleeve; 9. a support assembly; 21. positioning a shaft shoulder; 81. positioning the boss; 82. a slag blowing channel; 71. a first channel; 72. a second channel; 73. a slag collecting sleeve; 74. clamping springs;

11. an outer sleeve; 12. a joint; 13. a connecting pipe; 14. a non-return valve; 15. an inner cylinder; 16. a collection tube; 17. a first chamber; 18. a second chamber; 19. and (3) a piston.

Detailed Description

In order to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below, and it is obvious that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present application and simplify description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" or "a number" is two or more, unless explicitly defined otherwise.

It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the scope of the present disclosure, since any structural modifications, proportional changes, or dimensional adjustments made by those skilled in the art should not be made in the present disclosure without affecting the efficacy or achievement of the present disclosure.

The embodiment of the utility model is written in a progressive manner.

As shown in fig. 1 to 6, an embodiment of the present utility model provides a reverse circulation cone impactor comprising: the front end of the impactor body is provided with a drill rod clamping sleeve 2; the drill bit tail handle 3 is sleeved in the drill bit clamping sleeve 2, a high-pressure air channel 4 is arranged between the outer wall of the drill bit tail handle 3 and the inner wall of the drill bit clamping sleeve 2, and a central channel 5 is arranged along the axial direction of the drill bit tail handle 3; and the roller bit 6 is connected with the front end of the bit tail handle 3, the working end surface of the roller bit 6 is provided with a slag discharging port, and the slag discharging port is connected with a slag discharging channel assembly 7 of the central channel 5.

The waste gas of the cone impactor in the prior art is usually discharged from the center of the cone bit 6, and the rock slag is discharged from both sides of the cone impactor under the action of pressure, but for the rock stratum with cracks, hidden rivers and karst cave, the waste gas is easy to escape from the cracks, hidden rivers and karst cave after being discharged, and enough power cannot be provided to discharge the rock slag from both sides of the cone impactor.

The utility model provides a reverse circulation cone impactor, which comprises an impactor main body, a bit tail handle 3 and a cone bit 6, wherein the front end of the impactor main body is provided with a drill clamping sleeve 2, the bit tail handle 3 is sleeved in the drill clamping sleeve 2, a high-pressure air channel 4 is arranged between the outer wall of the bit tail handle 3 and the inner wall of the drill clamping sleeve 2, a central channel 5 is arranged along the axial direction of the bit tail handle 3, the cone bit 6 is connected with the front end of the bit tail handle 3, a slag discharging port is arranged on the working surface of the cone bit 6, a slag discharging channel component 7 is arranged in the cone bit 6, the slag discharging channel component 7 is used for communicating the slag discharging port and the central channel 5, waste gas generated by the reverse circulation impactor in operation is discharged through the high-pressure air channel 4, the air pressure at the cone bit 6 is higher, the air pressure at the slag discharging channel component 7 and the central channel 5 is lower, so that pressure difference exists at the two ends of the slag discharging port, and rock slag is discharged from the central channel 5 through the slag discharging port and the slag discharging channel component 7 under the action of the pressure difference.

Compared with the cone impacter in the prior art, the reverse circulation cone impacter provided by the utility model changes the exhaust gas discharge and rock slag discharge paths, and the rock slag in the drilled hole is discharged through the slag discharge port, the slag discharge channel assembly 7 and the central channel 5 by the air pressure difference between the central channel 5 and the bottom of the drilled hole, so that the rock slag blockage can be prevented, the slag discharge effect is good, and the drilling efficiency is higher.

In the above structure, the impactor main body in the embodiment of the utility model comprises the outer sleeve 11, the outer sleeve 11 is connected with the rear end of the drill rod clamping sleeve 2, the drill bit tail handle 3 is fixedly connected with the drill rod clamping sleeve 2, and the roller bit 6 is exposed out of the front end of the drill rod clamping sleeve 2 and is used for drilling.

The maximum external diameter of the roller bit 6 is larger than the external diameter of the outer sleeve 11 so as to ensure that the outer sleeve 11 can enter into a cavity along a drilling hole, one end of the outer sleeve 11, which is far away from the drill clamping sleeve 2, is provided with a connector 12, a connecting pipe 13 is sleeved in the connector 12, a high-pressure gas channel 4 through which high-pressure gas flows is arranged between the outer wall of the connecting pipe 13 and the inner wall of the connector 12, the connecting pipe 13 and a collecting pipe 16 are coaxially arranged, a channel for deslagging is arranged in the collecting pipe 16, a piston 19 is sleeved in the outer sleeve 11, the piston 19 is sleeved on the outer side of the collecting pipe 16 and can reciprocate along the axial direction of the collecting pipe 16, one end of the piston 19, which is far away from the roller bit 6, is connected with an inner cylinder 15, the high-pressure gas pushes the piston 19 to reciprocate along the axial direction in the outer sleeve 11, acts on the end face of a drill tail handle 3, pulse acting force is provided for the roller bit 6, the waste gas after passing through the high-pressure gas is blown out of the high-pressure gas channel 4 between the drill clamping sleeve 2 and the tail handle, deslagging channel assembly 7 and the central channel 5 of the roller bit 6 are blown into the deslagging channel assembly 6, and the deslagging is reflowing along the collecting pipe 16, and the collecting pipe 16, so that efficient collection of the slag rock is realized.

The utility model provides a specific structure of an impactor body, as shown in fig. 2, high-pressure gas sequentially enters into a joint 12, pushes a check valve 14 open through a gap between the joint 12 and a connecting pipe 13, enters into a gap between an inner cylinder 15 and a collecting pipe 16, then enters into a first chamber 17 through a gap between the inner cylinder 15 and an outer sleeve 11, the first chamber 17 is formed by a drill bit tail handle 3, a piston 19, the outer sleeve 11 and the collecting pipe 16, when the air pressure of the first chamber 17 is higher than that of a second chamber 18, the second chamber 18 is formed by the inner cylinder 15, the piston 19 and the collecting pipe 16, the piston 19 moves towards the joint 12, and the gas in the second chamber 18 enters into a high-pressure gas channel 4 between the drill bit tail handle 3 and a drill rod sleeve 2 through a gap between the piston 19 and the central pipe, and is discharged for slag blowing.

When the piston 19 moves to a certain position, the air inlet of the first chamber 17 is closed, the air outlet of the first chamber 17 is opened, the air inlet of the second chamber 18 is opened, the air outlet of the second chamber 18 is closed, high-pressure gas enters into the second chamber 18 through the air inlet of the second chamber 18, when the air pressure in the second chamber 18 is larger than that of the first chamber 17, the piston 19 is pushed to move towards the direction of the drill bit, and then the rock is impacted through the working surface of the roller bit 6, so that the rock is broken, and the high-pressure gas in the first chamber 17 is discharged through the high-pressure air channel 4 to blow slag.

The first chamber 17 and the second chamber 18 are alternately communicated with high-pressure gas, so that the air pressure in the first chamber 17 and the air pressure in the second chamber 18 are changed, the piston 19 is pushed to reciprocate to impact the bit tail handle 3 of the roller bit 6, pulse acting force is provided for the roller bit 6, and meanwhile, the drilling machine drives the impactor and the roller bit 6 to rotate, so that the purpose of uniformly crushing rock to drill holes is achieved.

Furthermore, the structure of the impactor main body in the embodiment of the utility model is not limited to the specific structure, and can be the structure of the existing reverse circulation impactor main body, and the improvement point of the utility model is mainly that the structure of the roller bit 6 is improved so that the roller bit 6 can be matched with the reverse circulation impactor main body, and slag discharge of the roller bit 6 through the slag discharge port and the slag discharge channel assembly 7 is realized.

In the above structure, since the diameter of the drill clamping sleeve 2 is smaller than that of the roller bit, high-pressure gas discharged from the high-pressure gas channel 4 blows partial rock slag into a gap between the impactor and the inner wall of the drill hole, as one implementation mode, the reverse circulation roller bit impactor in the embodiment of the utility model further comprises a wear-resistant sleeve 8, wherein the wear-resistant sleeve 8 is sleeved on the outer side of the drill clamping sleeve 2, a positioning shaft shoulder 21 is arranged on the outer wall of the drill clamping sleeve 2, a positioning boss 81 matched with the positioning shaft shoulder 21 is arranged on the inner wall of the wear-resistant sleeve 8, and the wear-resistant sleeve 8 is sleeved on the outer side of the drill clamping sleeve 2 and positions the wear-resistant sleeve 8 through the positioning boss 81 and the positioning shaft shoulder 21. When the roller bit impactor works, the outer wall of the drill clamping sleeve 2 is easy to wear, and the wear of the drill clamping sleeve 2 and the drill bit tail handle 3 is prevented due to the fact that the wear-resistant sleeve 8 is arranged.

Further, the drill bit tail handle 3 and the drill clamping sleeve 2 are connected through a spline.

In the above structure, as one of the embodiments, the reverse circulation roller cone impactor according to the embodiment of the present utility model further comprises a slag blowing channel 82 disposed between the wear sleeve 8 and the bit shank 3, wherein the slag blowing channel 82 communicates with the high pressure gas channel 4, and the outer diameter of the wear sleeve 8 is smaller than the maximum diameter of the roller bit 6, so that the rock slag is discharged from the slag discharge port through the slag discharge channel assembly 7.

Furthermore, as one of the embodiments, the maximum outer diameter of the wear-resistant sleeve 8 and the roller bit 6 in the embodiment of the present utility model is 0.5 to 2.5mm, that is, only a small gap is formed between the wear-resistant sleeve 8 and the wall of the drilled hole, when the exhaust gas in the impactor enters the head region of the roller bit 6 through the high pressure air channel 4, the wear-resistant sleeve 8 can block the rock slag at the bottom of the hole, so as to avoid the high pressure air flow from blowing the rock slag into the gap between the outer sleeve 11 and the wall of the hole, and blowing the rock slag into the slag discharging port of the roller bit 6.

In the above structure, since the roller bit 6 receives a larger reaction force during drilling, as a more preferred embodiment, the reverse circulation roller bit impactor according to the embodiment of the utility model further comprises a support assembly 9 for supporting the wear-resistant sleeve 8, the support assembly 9 is arranged between the bit shank 3 and the wear-resistant sleeve 8, the support assembly 9 comprises at least two support blocks, the support blocks are uniformly arranged at intervals around the circumference of the bit shank 3, and the outer wall of the support blocks is contacted with the inner wall of the wear-resistant sleeve 8, so that the wear-resistant sleeve 8 is prevented from shaking and shifting during drilling. In addition, the supporting blocks are uniformly arranged at intervals in the circumferential direction of the drill bit tail handle 3, and slag blowing channels 82 for high-pressure gas flow are formed between adjacent supporting blocks.

In the above structure, as one of more preferable embodiments, the support assemblies 9 in the reverse circulation cone impactor according to the embodiment of the present utility model are provided in at least two groups and are spaced apart along the axial direction of the bit shank 3. By being provided with two sets of support assemblies 9 at least, the supporting effect to wear sleeve 8 is better.

Further, the support component 9 and the drill shank 3 are specifically formed integrally.

In the above structure, as one embodiment, at least two slag discharging ports are provided in the reverse circulation cone impactor according to the embodiment of the present utility model, and the slag discharging ports are disposed at intervals on the working end face of the cone drill bit 6. By arranging at least two slag discharging ports, the slag discharging efficiency is higher.

In the above structure, as one embodiment, the slag discharging channel assembly 7 in the embodiment of the present utility model includes the first channel 71, the second channel 72 and the slag collecting sleeve 73, where the first channel 71 is coaxially disposed with the central channel 5, the second channel 72 is used for communicating the slag discharging port with the first channel 71, and the slag in the hole bottom enters into the central channel 5 through the slag discharging port, the second channel 72 and the first channel 71 and is discharged. Further, the second channels 72 in the embodiment of the present utility model are disposed in one-to-one correspondence with the slag discharging openings.

Still further, in order to prevent the inner wall of the first channel 71 from being worn during the slag discharging process, as a more preferable embodiment, the slag discharging channel assembly 7 in the embodiment of the present utility model further includes a slag collecting sleeve 73, which prevents the inner wall of the second channel 72 from being worn too quickly by the slag, and prolongs the service life of the roller bit 6.

In the above structure, in order to facilitate the processing of the roller bit 6, as one of the preferred embodiments, the slag collecting sleeve 73 and the roller bit 6 in the embodiment of the present utility model are specifically detachably connected.

More specifically, as one of the embodiments, the slag discharging channel assembly 7 in the embodiment of the present utility model includes a mounting groove and a clamp spring 74, where the mounting groove is disposed in the second channel 72, the slag collecting sleeve 73 is disposed in the mounting groove, one end of the slag collecting sleeve 73 contacts with the bottom surface of the mounting groove, one end of the slag collecting sleeve 73, which is far away from the drill bit tail shank 3, contacts with the clamp spring 74, in order to facilitate the installation of the clamp spring 74, one end of the mounting groove, which is far away from the drill bit tail shank 3, is provided with the clamp spring groove, the clamp spring 74 is specifically of an open annular structure, the slag collecting sleeve 73 is disposed in the mounting groove, and the clamp spring 74 is installed in the clamp spring groove, the slag collecting sleeve 73 is positioned by the end surface of the clamp spring 74, the clamp spring 74 facilitates the disassembly and the replacement of the slag collecting sleeve 73.

In the above structure, the service life of the roller bit 6 is often shorter than that of the bit shank 3, and in order to facilitate replacement of the roller bit 6, as one embodiment, the roller bit 6 and the bit shank 3 in the embodiment of the present utility model are detachably connected.

In the above structure, as a more specific embodiment, the cross-sectional shape of the bit shank 3 in the embodiment of the present utility model is specifically circular, and the bit shank 3 and the roller bit 6 are specifically connected by cone threads, and further, the bit shank 3 and the roller bit 6 in the embodiment of the present utility model may also be connected by using a pin.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A reverse circulation cone impactor comprising:

the front end of the impactor body is provided with a drill rod clamping sleeve (2);

the drill bit tail handle (3) is sleeved in the drill bit clamping sleeve (2), a high-pressure air passage (4) is arranged between the outer wall of the drill bit tail handle (3) and the inner wall of the drill bit clamping sleeve (2), and a central channel (5) is arranged along the axial direction of the drill bit tail handle (3);

and the roller bit (6) is connected with the front end of the bit tail handle (3), a slag discharge port is arranged on the working end surface of the roller bit (6), and the slag discharge port is connected with a slag discharge channel assembly (7) of the central channel (5).

2. The reverse circulation cone impactor of claim 1, wherein,

further comprises:

a positioning shaft shoulder (21) arranged on the outer wall of the drill rod clamping sleeve (2);

the wear-resistant sleeve (8) is sleeved on the outer side of the drill clamping sleeve (2), and a positioning boss (81) matched with the positioning shaft shoulder (21) for use is arranged on the inner wall of the wear-resistant sleeve (8).

3. The reverse circulation cone impactor of claim 2, wherein,

a slag blowing channel (82) communicated with the high-pressure air channel (4) is arranged between the wear-resistant sleeve (8) and the drill bit tail handle (3), and the outer diameter of the wear-resistant sleeve (8) is smaller than the maximum diameter of the roller bit (6), so that rock slag is discharged from the slag discharging port through the slag discharging channel assembly (7).

4. The reverse circulation cone impactor of claim 3, wherein,

further comprises:

the support assembly (9) is arranged between the drill bit tail handle (3) and the wear-resistant sleeve (8), the support assembly (9) comprises at least two support blocks, and the support blocks are uniformly arranged at intervals around the circumference of the drill bit tail handle (3).

5. The reverse circulation cone impactor of claim 4, wherein,

the support assemblies (9) are at least provided with two groups and are arranged at intervals along the axial direction of the drill tail handle (3).

6. The reverse circulation cone impactor of any one of claims 1 to 5,

the slag discharging holes are at least provided with two groups, and are arranged on the working end face of the roller bit (6) at intervals.

7. The reverse circulation cone impactor of claim 6, wherein,

the slag discharge channel assembly (7) comprises:

a first channel (71) coaxially arranged with the central channel (5);

a second passage (72) communicating the first passage (71) and the slag discharge port;

and a slag collecting sleeve (73) arranged on the inner wall of the second channel (72).

8. The reverse circulation cone impactor of claim 7, wherein,

the slag discharging channel component (7) further comprises:

the mounting groove is arranged in the second channel (72) and is used for placing the slag collecting sleeve (73);

one end of the slag collecting sleeve (73) is in contact with the bottom surface of the mounting groove, and one end of the slag collecting sleeve (73) away from the drill bit tail handle (3) is positioned through a clamp spring (74).

9. The reverse circulation cone impactor of any one of claims 1-5 and 7-8,

the bit tail handle (3) is detachably connected with the roller bit (6).

10. The reverse circulation cone impactor of claim 9, wherein,

the bit tail handle (3) is connected with the roller bit (6) through conical threads.