A high strength down-the-hole drill bit

Abstract

The utility model relates to the field of down -the -hole drill bit discloses a high -strength down -the -hole drill bit, including the punch drill for punching, the top fixed connection of punch drill has fixed spline cover, the top fixed connection of fixed spline cover has fixed cover the top fixed connection of fixed cover has connecting seat, the inside of fixed spline cover is equipped with ventilation slot, the inside bottom of fixed spline cover is equipped with a plurality of air inlet slot, the air inlet slot and ventilation slot are through, the inside installation of punch drill has the broken slag upper row slot, to be used for realizing the broken slag discharge convenient in the inside of punching. In the utility model, the broken slag is discharged to the outside through the air along with the outer vent slot and the outer row slot, and is lifted by the raised arc groove, the convenience of the device to the broken slag discharge in the drilling is improved, the judgment of the depth of the hole is facilitated, and the stability of the device for punching is improved, the service life of the drill bit is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to a down -the -hole drill bit field especially relates to a high strength down -the -hole drill bit. BACKGROUND

[0002] Down -the -hole drill bit is a kind of special drill bit for underground rock drilling, it is designed for high-speed rotation and impact to break hard rock layer, usually installed at the end of down -the -hole drill or drill rod, can directly drill in hole bottom under the condition of not taking out drill rod, suitable for mine, tunnel and geological exploration and other engineering.

[0003] In the process of punching, with the deepening of down -the -hole drill bit, a large amount of debris is accumulated inside the hole, the drill bit is taken out because the depth of hole cannot be observed accurately due to the obstruction of debris, and in the process of pressing and rock drilling, the drill teeth have high hardness, and hard extrusion is easy to occur at the bottom of drill teeth when contacting with the groove, which may adversely affect the structural stability of drill bit matrix. UTILITY MODEL CONTENT

[0004] The utility model aims at solving the shortcomings in the prior art, and provides a high strength down -the -hole drill bit, which improves the convenience of debris discharge inside the drill hole and guarantees the service life of the drill bit.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] A high strength down -the -hole drill bit, comprising:

[0007] The punch drill bit for punching, the top end of the punch drill bit is fixedly connected with a fixed spline sleeve, the top end of the fixed spline sleeve is fixedly connected with a fixed sleeve, the top end of the fixed sleeve is fixedly connected with a connecting seat, a ventilation slot is formed in the inside of the fixed spline sleeve, a plurality of air inlet slots are formed in the inside bottom end of the fixed spline sleeve, the air inlet slots are communicated with the ventilation slot, and a slag discharge slot is arranged in the inside of the punch drill bit to realize the convenient discharge of the slag inside the punch.

[0008] A plurality of penetrating slots are formed in the bottom of the punch drill bit, a soil breaking block is embedded in the inside of each penetrating slot, and the top end of the soil breaking block is connected with the inside of the penetrating slot through a limiting component to improve the stability of the soil breaking block in the punching process.

[0009] Further, the limiting component includes a connecting block at the top end of the soil breaking block, a anti-drop piece is fixedly connected to the inner side of the penetrating slot, a limiting slot is formed in the inside top of the penetrating slot, and the connecting block is nested in the inside of the limiting slot.

[0010] Further, the broken slag upper row of notches includes a plurality of air inlet slag discharge ports opened in the interior of the perforating drill bit, the bottom end of the perforating drill bit is provided with an outer through notch outside the air inlet slag discharge port, and a plurality of outer discharge notches are uniformly arranged around the exterior of the perforating drill bit, and the bottom part of the outer discharge notch is in communication with the outer through notch.

[0011] Further, a plurality of lifting arc grooves are uniformly arranged around the exterior of the perforating drill bit, so that dust is lifted upwards.

[0012] Further, a breaking soil cone is fixedly connected to the middle part of the bottom end of the perforating drill bit, so that the breaking of the hole is realized.

[0013] Further, a plurality of air inlet slag discharge ports are in communication with a plurality of air inlet notches.

[0014] Further, a buffer gasket is fixedly connected to the interior top end of the limiting notch, so that the buffer of the breaking soil block force is realized.

[0015] The utility model has the following beneficial effects:

[0016] In the utility model, air is introduced into the interior of the drill bit through the ventilation notch, and the air is discharged downwards through the air inlet slag discharge port, so that the debris is discharged outside through the air along the outer through notch and the outer discharge notch, and the debris is lifted by the lifting arc groove, the convenience of the device for discharging the debris in the hole is improved, and the depth of the hole is conveniently judged.

[0017] In the utility model, the breaking soil block contacts the rock surface, the vibration force generated by the breaking soil block is transmitted upwards, the vibration force is collected through the limiting notch, and the vibration force transmitted by the buffer gasket is buffered to a certain extent, so that the stability of the device for drilling is improved, and the service life of the drill bit is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 An overall view of the high-strength down-the-hole drill bit is provided in the utility model;

[0019] Figure 2 A bottom view of the high-strength down-the-hole drill bit is provided in the utility model;

[0020] Figure 3 An interior view of the perforating drill bit of the high-strength down-the-hole drill bit is provided in the utility model;

[0021] Figure 4 An Figure 3 An enlarged view of position A in the middle;

[0022] Figure 5 An interior view of the fixed spline sleeve of the high-strength down-the-hole drill bit is provided in the utility model.

[0023] Legend:

[0024] 1. punch drill; 2. fixed spline sleeve; 3. fixed sleeve; 4. connecting seat; 5. outer discharge notch; 6. lifting arc groove; 7. soil breaking block; 8. outer through notch; 9. soil breaking cone; 10. air inlet and residue discharge port; 11. buffer gasket; 12. limiting notch; 13. anti-falling piece; 14. insertion notch; 15. connecting block; 16. ventilation notch; 17. air inlet notch. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0026] With reference to Figure 1 , Figure 2 and Figure 5 , the present application provides an embodiment: a high-strength down-the-hole drill bit, comprising: a punch drill 1 for punching, a fixed spline sleeve 2 is fixedly connected to the top end of the punch drill 1, a fixed sleeve 3 is fixedly connected to the top end of the fixed spline sleeve 2, a connecting seat 4 is fixedly connected to the top end of the fixed sleeve 3, a ventilation notch 16 is formed in the inside of the fixed spline sleeve 2, a plurality of air inlet notches 17 are formed in the inside bottom end of the fixed spline sleeve 2, the air inlet notches 17 and the ventilation notch 16 are through, a residue discharge upper discharge groove is installed in the inside of the punch drill 1, so as to realize convenient discharge of residue inside the punching, the residue discharge upper discharge groove comprises a plurality of air inlet and residue discharge ports 10 formed in the inside of the punch drill 1, an outer through notch 8 is formed on the outside of the air inlet and residue discharge port 10 at the bottom end of the punch drill 1, a plurality of outer discharge notches 5 are formed around the outside of the punch drill 1, the bottoms of the outer discharge notches 5 and the outer through notches 8 are through, a plurality of lifting arc grooves 6 are uniformly formed around the outside of the punch drill 1, so as to realize upward lifting of dust, a soil breaking cone 9 is fixedly connected to the middle of the bottom end of the punch drill 1, so as to realize breaking of the drilling, the plurality of air inlet and residue discharge ports 10 are through between the plurality of air inlet notches 17.

[0027] When the drill bit is performing a drilling operation, the downward air pressure force is applied to the inside of the drill bit through the ventilation slot 16, the high-speed airflow flows downward along the ventilation slot, and is dispersed under the action of the plurality of air inlet slots 17, and then flows into the inside of the air inlet and residue discharge port 10. The middle part of the bottom end of the drilling bit 1 is designed with a groove, which creates the necessary conditions for air flow. When the airflow contacts the broken debris, it will discharge these debris to the outside through the plurality of outer ventilation slots 8. Due to the limitation of the drilled hole space, the air is discharged upward through the plurality of outer discharge slots 5, and the debris is moved upward together. With the high-speed rotation of the drill bit, the debris moves along the arc surface in the raised arc groove 6 and is thrown upward, thereby effectively discharging the debris outside the hole. This design greatly improves the efficiency of the device in discharging the debris inside the hole, and also facilitates the operator to judge the depth of the hole according to the discharge of the debris, thereby ensuring the smooth progress of the drilling operation.

[0028] With reference to Figure 2 , Figure 3 and Figure 4 , the plurality of penetrating slots 14 are opened at the bottom of the drilling bit 1, and the penetrating slots 14 are each nested with a soil breaking block 7. The top end of the soil breaking block 7 is connected to the inside of the penetrating slot 14 through a limiting assembly, so as to improve the stability of the soil breaking block 7 during the drilling process. The limiting assembly includes a connecting block 15 at the top end of the soil breaking block 7, and the inner side of the penetrating slot 14 is fixedly connected with an anti-disengagement piece 13. The inside of the penetrating slot 14 is provided with a limiting slot 12 at the top, and the connecting block 15 is nested in the limiting slot 12. The inside top end of the limiting slot 12 is fixedly connected with a buffer pad 11, so as to realize the buffering of the force of the soil breaking block 7.

[0029] During the drilling operation on the rock surface, the plurality of soil breaking blocks 7 contact the rock surface and produce strong vibration. The force generated by the soil breaking blocks 7 during the action is transmitted inward, and the limiting slot 12 plays a role in gathering the transmitted force of the soil breaking blocks 7, and transmits the force to the buffer pad 11 through the top. The buffer pad 11 buffers the vibration of the soil breaking block 7, effectively reducing the intensity of the vibration. At the same time, the anti-disengagement piece 13 fixes the soil breaking block 7 to prevent it from falling off, further enhancing the stability of the device. This design improves the overall stability of the drilling device, ensures the durability and service life of the drill bit during the operation process, and thereby improves the efficiency and safety of the drilling operation.

[0030] Working principle: in the process of drilling, the downwind pressure force is released to the inside of the drill bit through the ventilation slot 16, the high-speed flow wind is divided by multiple air inlet slots 17 and enters the inside of the air inlet and slag discharge port 10, the middle part of the bottom end of the drilling bit 1 has a groove, which provides certain conditions for air flow, the flow wind contacts the broken debris and discharges the debris to the outside through multiple outer ventilation slots 8, and because of the limitation of the drilled hole, the air is discharged to the upper side through multiple outer discharge slots 5, the air carries the debris to the upper side, and with the high-speed rotation of the drill bit, the debris is in the inside of the lifting arc groove 6, and with the arc surface of the lifting arc groove 6, the debris is thrown to the upper side, so that the debris is more conveniently discharged, in the process of drilling the rock surface, multiple soil breaking blocks 7 contact the rock surface and produce high degree of vibration, the force generated by the soil breaking block 7 is transmitted to the inside, the limiting slot 12 gathers the force transmitted by the soil breaking block 7, and transmits it to the buffer pad 11 through the top, the buffer pad 11 buffers the vibration of the soil breaking block 7 to a certain extent, and the anti-drop piece 13 limits the soil breaking block 7, further improving the stability of the device.

[0031] Finally, it should be pointed out that: the above only for the preferred embodiments of the present application, and does not limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application, should be included in the protection scope of the present application.

Claims

1. A high-strength down-the-hole drill bit, characterized in that, include: A drilling drill bit (1) for drilling holes, wherein a fixed spline sleeve (2) is fixedly connected to the top end of the drilling drill bit (1), a fixed sleeve (3) is fixedly connected to the top end of the fixed spline sleeve (2), and a connecting seat (4) is fixedly connected to the top end of the fixed sleeve (3). A ventilation slot (16) is provided inside the fixed spline sleeve (2), and multiple air inlets (17) are provided at the bottom end of the fixed spline sleeve (2). The air inlets (17) and the ventilation slots (16) are connected. A slag discharge slot is installed inside the drilling drill bit (1) to facilitate the discharge of slag inside the hole. Multiple through slots (14) are opened at the bottom of the drilling bit (1). Each through slot (14) contains a soil breaking block (7). The top of the soil breaking block (7) is connected to the inside of the through slot (14) by a limiting component to improve the stability of the soil breaking block (7) during the drilling process.

2. The high-strength down-the-hole drill bit according to claim 1, characterized in that: The limiting component includes a connecting block (15) located at the top of the soil-breaking block (7), and anti-detachment plates (13) are fixedly connected to the inner side of the through slot (14). A limiting slot (12) is opened on the top of the inside of the through slot (14), and the outside of the connecting block (15) is nested inside the limiting slot (12).

3. A high-strength down-the-hole drill bit according to claim 1, characterized in that: The slag discharge slot includes multiple air inlet and slag outlets (10) located inside the drilling bit (1). The bottom end of the drilling bit (1) is provided with an external through slot (8) on the outside of the air inlet and slag outlet (10). Multiple external discharge slots (5) are provided around the outside of the drilling bit (1). The bottom of the external discharge slots (5) are connected to the external through slots (8).

4. A high-strength down-the-hole drill bit according to claim 1, characterized in that: The outer circumference of the drilling bit (1) is evenly provided with multiple lifting arc grooves (6) to enable dust to be lifted to the upward side.

5. A high-strength down-the-hole drill bit according to claim 1, characterized in that: The bottom center of the drilling bit (1) is fixedly connected to a soil-breaking cone (9) for breaking the borehole.

6. A high-strength down-the-hole drill bit according to claim 3, characterized in that: The multiple air inlet and slag outlets (10) are respectively connected to the multiple air inlet slots (17).

7. A high-strength down-the-hole drill bit according to claim 2, characterized in that: A buffer pad (11) is fixedly connected to the top of the inner end of the limiting slot (12) to buffer the force of the soil breaking block (7).

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