CN219887982U

CN219887982U - Rotary drilling bottom plate for drill bit and rotary drilling bit using same

Info

Publication number: CN219887982U
Application number: CN202320730235.0U
Authority: CN
Inventors: 李毅
Original assignee: Changsha Golden Drill Machinery Co ltd
Current assignee: Changsha Golden Drill Machinery Co ltd
Priority date: 2023-04-03
Filing date: 2023-04-03
Publication date: 2023-10-24
Anticipated expiration: 2033-04-03

Abstract

The utility model discloses a rotary drilling bottom plate for a drill bit and a rotary drilling bit using the same, and relates to the technical field of rotary drilling bits, wherein the rotary drilling bottom plate comprises a base plate and a plurality of tooth head assemblies, the base plate is arranged at a screwing end of the drill bit, and a material passing opening is formed in the surface of the base plate; the first end of the tooth head component is positioned at the outer side of the base plate, the second end of the tooth head component extends towards the center of the base plate, a plurality of tooth head components are distributed around the circumference of the base plate, the tooth head component is provided with rotary digging tooth heads, an included angle a is formed between the rotary digging tooth heads and the surface of the base plate, the angle a is less than 65 degrees, and the head of the rotary digging tooth head is inclined towards the rotation direction of the drill bit. The rotary digging bottom plate for the drill bit and the rotary digging drill bit using the same are suitable for pile hole forming operation of hard rock layers with high compressive strength, high in hard rock crushing efficiency, high in structural strength and capable of reducing construction time.

Description

Rotary drilling bottom plate for drill bit and rotary drilling bit using same

Technical Field

The utility model relates to the technical field of rotary drilling bits, in particular to a rotary drilling bottom plate for a drill bit and the rotary drilling bit using the same.

Background

The rotary drilling rig is a construction process suitable for pore-forming operation in building foundation engineering. The method is widely used for foundation construction projects such as municipal construction, highway bridges, high-rise buildings and the like.

The rotary drilling rig is used for pile hole forming operation in pile foundation construction, and rock stratum with weathering degree reaching about 100Mpa compressive strength is easy to be encountered. If the common sand scooping bucket, barrel drill and roller cone barrel drill are adopted for rotary drilling, the construction difficulty is high, the construction efficiency is low, the rock stratum is required to be crushed first, and then pile hole construction is carried out by the rotary drilling bit, so that the construction mode is long in time consumption and high in cost.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the rotary digging bottom plate for the drill bit, which is suitable for pile hole forming operation of hard rock stratum with high compressive strength, has high crushing efficiency on the hard rock, has high structural strength and reduces construction time.

The utility model also provides a rotary drilling bit, and the rotary drilling bottom plate for the bit is used.

According to an embodiment of the first aspect of the utility model, a rotary drilling floor for a drill bit comprises: the base plate is used for being arranged at the screwing-in end of the drill bit, and a material passing opening is formed in the surface of the base plate;

the tooth head assembly is provided with a first end and a second end, the first end of the tooth head assembly is positioned on the outer side of the base plate, the second end of the tooth head assembly extends towards the center of the base plate, the tooth head assemblies are distributed around the circumference of the base plate, the tooth head assembly is provided with rotary digging tooth heads, an included angle a is formed between the rotary digging tooth heads and the surface of the base plate, an included angle a is less than 65 degrees, and the head of the rotary digging tooth heads inclines towards the rotation direction of a drill bit.

The rotary digging bottom plate for the drill bit provided by the embodiment of the utility model has at least the following beneficial effects: the rotary digging bottom plate is arranged at the precession end of the drill bit and is directly contacted with the rock stratum to crush the rock stratum; the included angle between the rotary digging tooth head and the base plate is 50-65 degrees, and in the process of screwing the drill bit, the force applied by the rotary digging tooth head to the surface of the rock stratum not only has the pressure vertical to the surface of the rock stratum, but also has the shearing force to the surface of the rock stratum, and the rock stratum is more easily broken due to the shearing force parallel to the layer body. The angle between the rotary digging tooth head and the base plate is in the range, the structure is stronger, and when the rotary digging tooth head is subjected to the acting force transmitted by the rock stratum, the connecting welding seam is not easy to crack, so that the rotary digging tooth head is broken.

According to some embodiments of the utility model, the tooth head assembly further comprises a tooth plate, two ends of the tooth plate are a first end and a second end, a plurality of mounting grooves are formed in one side edge of the tooth plate, the mounting grooves are arranged along the direction from the first end to the second end, each mounting groove is fixedly provided with one rotary digging tooth head, one side edge opposite to the mounting groove on the tooth plate is fixedly connected with the base plate, and an included angle is formed between the plate surface of the tooth plate and the base plate so as to meet the angle setting of the rotary digging tooth heads.

According to some embodiments of the utility model, the toothed plate is provided with a lapping table on one side edge for connecting the base plate, so that the toothed plate is inserted in the material passing hole, the plate surface of the toothed plate is contacted with the side edge of the material passing hole, and the lapping table is contacted with the plate surface of the base plate.

According to some embodiments of the utility model, the rotary pick head comprises a cartridge having a cartridge cavity and a pick fixedly disposed within the mounting slot, the pick removably insertable into the cartridge cavity of the cartridge.

According to some embodiments of the utility model, the plurality of the material passing openings are distributed on the surface of the substrate around the axis of the substrate.

According to a second aspect of the utility model, a rotary drill bit comprises a square box assembly, wherein the square box assembly is used for being connected with a rotary excavator;

the barrel, the inside cavity that has of barrel, the one end of barrel with square chest subassembly is connected, and the other end is equipped with the rotary drilling bottom plate that is used for on the drill bit of arbitrary.

The rotary drilling bit provided by the embodiment of the utility model has at least the following beneficial effects: the rotary digging machine is connected with a cylinder body with a rotary digging bottom plate through a square box assembly; the cylinder is used for temporarily loading broken rock stratum fragments so as to reduce friction outside the cylinder and reduce loss; the rotary digging bottom plate is provided with an included angle between the rotary digging tooth head and the base plate at 50-65 degrees, and in the process of screwing the drill bit, the rotary digging tooth head applies force to the surface of the rock stratum, not only is the pressure perpendicular to the surface of the rock stratum, but also the shearing force to the surface of the rock stratum exists, and the rock stratum is more easily broken due to the shearing force parallel to the layer body.

According to some embodiments of the utility model, the square box assembly comprises a box body and a top plate, wherein the box body is hollow, a through connecting shaft hole is formed in the side wall of the box body, the plate surface of the top plate is perpendicular to the central shaft of the box body and is fixed on the end surface of one side of the box body, facing the cylinder body, of the box body, and the end part of the cylinder body is connected with the top plate, so that the side edge of the top plate is in contact with the inner wall of the cylinder body.

According to some embodiments of the utility model, a plurality of reinforcing plates are further arranged on the surface of the side of the top plate facing the cylinder.

According to some embodiments of the utility model, a plurality of triangular rib plates are arranged on the side wall of the box body, and the rib plates are fixed on the edges of the square box and extend to be connected with the top plate.

According to some embodiments of the utility model, the outer wall of the cylinder is provided with a plurality of wear-resistant strips, and the plurality of wear-resistant strips are distributed circumferentially.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The utility model is further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic view of a rotary drilling floor for a drill bit according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a toothed plate according to an embodiment of the present utility model;

FIG. 3 is a schematic view of a rotary drill bit according to an embodiment of the present utility model;

fig. 4 is a schematic structural diagram of a square box assembly according to an embodiment of the present utility model.

Reference numerals:

the cutting tool comprises a base plate 100, a material passing hole 110, a rotary cutting head 200, a clamping seat 210, cutting teeth 220, a tooth plate 300, a mounting groove 310 and a lapping platform 320;

square chest assembly 400, chest 410, connecting shaft hole 411, top plate 420, reinforcing plate 430, rib plate 440, barrel 500, and wear strip 510.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the direction or positional relationship indicated with respect to the description of the orientation, such as up, down, etc., is based on the direction or positional relationship shown in the drawings, is merely for convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the apparatus or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, plural means two or more. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

Referring to FIG. 1, a rotary drilling floor for use on a drill bit according to one embodiment of the present utility model includes a base plate 100 and a plurality of bit assemblies;

the base plate 100 is used for being installed at the screwing-in end of a drill bit, and a material passing opening 110 is formed in the plate surface of the base plate 100;

the tooth head assembly is provided with a first end and a second end, the first end of the tooth head assembly is positioned at the outer side of the base plate 100, the second end of the tooth head assembly extends towards the center of the base plate 100, a plurality of tooth head assemblies are distributed around the circumference of the base plate 100, the tooth head assemblies are provided with rotary digging tooth heads 200, an included angle a is formed between each rotary digging tooth head 200 and the surface of the base plate 100, the angle a is less than 65 degrees, and the head of each rotary digging tooth head 200 is inclined towards the rotation direction of the drill bit.

The base plate 100 is used for being arranged at the screwing-in end of a drill bit, and the rotary pick 200 arranged on the base plate 100 is directly contacted with the rock stratum to crush the rock stratum; the included angle between the rotary digging tooth 200 and the base plate 100 is set at 50-65 degrees, and in the process of screwing the drill bit, the force applied by the rotary digging tooth 200 to the surface of the rock stratum not only has the pressure vertical to the surface of the rock stratum, but also has the shearing force to the surface of the rock stratum, and the rock stratum is more easily broken due to the shearing force parallel to the layer body.

If the included angle between the rotary pick 200 and the base plate 100 is smaller than 50 °, that is, the rotary pick 200 is oriented parallel to the rock formation surface, although the rotary pick 200 has a higher resistance in the rotation direction of the drill bit, the pressure perpendicular to the rock formation surface is reduced, and the maximum friction is reduced, so that the rotary pick 200 slips on the rock formation surface, only scratches and the like can be left, and the crushing effect is poor. In addition, if the included angle between the rotary pick 200 and the substrate 100 is greater than 65 °, that is, the rotary pick 200 gradually tends to be perpendicular to the substrate 100, when the rotary pick 200 receives the reaction force of the rock layer, particularly along the rotation direction of the drill bit, the rotary pick 200 is twisted, which is easy to cause the weld fracture, and the rotary pick 200 falls off.

The angle between the rotary pick head 200 and the base plate is within this range, and the structure is stronger, so that when the rotary pick head 200 receives the acting force transmitted by the rock stratum, the connection weld is not easy to crack, resulting in the breakage of the rotary pick head.

Preferably, the rotary digging tooth 200 is arranged at the center of the base plate 100, and the driving working surface formed by the rotary digging tooth 200 at the center is higher than the driving working surface of the surrounding rotary digging tooth 200, namely, the rotary digging tooth 200 at the center is preferentially contacted with the surface of the rock stratum for rotary digging in the rotary digging operation process.

The second end of the tooth head assembly extends toward the center of the base plate 100, one toward the center point of the base plate 100, and the other in a direction having a deflection angle with the center point of the base plate 100, such as the configuration shown in fig. 1.

Referring to fig. 1 and 2, it can be understood that the tooth head assembly further includes a tooth plate 300, two ends of the tooth plate 300 are a first end and a second end, a side edge of the tooth plate 300 is provided with a plurality of mounting grooves 310, the mounting grooves 310 are arranged along a direction from the first end to the second end, a rotary digging tooth head 200 is fixedly arranged in each mounting groove 310, on the tooth plate 300, a side edge opposite to the mounting groove 310 is fixedly connected with the base plate 100, and an included angle is formed between a plate surface of the tooth plate 300 and the base plate 100 so as to meet the angle setting of the rotary digging tooth head 200.

The rotary digging tooth heads 200 are fixed on the tooth plates 300, and all the rotary digging tooth heads 200 on each tooth plate 300 form a group, so that the included angle between the rotary digging tooth heads 200 and the base plate 100 is easy to adjust, and the rotary digging tooth heads 200 are convenient to install and fix. Generally, the rotary pick head 200 is fixed on the toothed plate 300 by welding, and the mounting groove 310 can provide more welding space for the rotary pick head 200, so that the connection is more stable.

Further, the toothed plate 300 is provided with a lapping table 320 on one side edge for connecting the substrate 100, so that the toothed plate 300 is inserted into the material passing hole 110, and the plate surface of the toothed plate 300 contacts with the side edge of the material passing hole 110, and the lapping table 320 contacts with the plate surface of the substrate 100. The contact portion between the plate surface of the toothed plate 300 and the side edge of the material passing opening 110 can be welded, and the contact portion between the lapping table 320 and the plate surface of the substrate 100 can be welded, so that the welding point is increased, and the structural strength is increased by the contact between the lapping table 320 and the substrate 100.

It will be appreciated that the rotary pick head 200 includes a cartridge 210 and a pick 220, the cartridge 210 having a cartridge cavity, the cartridge 210 being fixedly disposed within the mounting slot 310, the pick 220 being removably insertable into the cartridge cavity of the cartridge 210.

Pick 220 is a pick head for rotary excavation, the tip of which has a cemented carbide head, and belongs to a common part. The cutting pick 220 does not require removal of the entire rotary pick head 200 after wear, and the rotary pick head 200 can be maintained by replacement of a single cutting pick 220, allowing for efficient rock formation breaking capability.

It is understood that the material passing openings 110 are provided in plurality, and the material passing openings 110 are distributed on the surface of the substrate 100 around the axis of the substrate 100. The plurality of material passing openings 110 can improve the passage rate of the rock stratum fragments compared with the single material passing opening 110, and prevent the rock stratum fragments from accumulating at the rotary digging tooth head 200 to affect the crushing efficiency. Of course, increasing the number of the feed-through 110 while ensuring the passage efficiency of the rock formation fragments, decreasing the size of a single feed-through 110 can also increase the structural strength of the substrate 100.

Referring to fig. 3, a rotary drill bit according to an embodiment of the present utility model includes a square box assembly 400, and a barrel 500;

the square box assembly 400 is used for connecting a rotary excavator;

the inside cavity that has of barrel 500, the one end of barrel 500 is connected with square chest subassembly 400, and the other end is equipped with and is used for the digs the bottom plate soon on the drill bit.

The drill rod of the rotary excavating machine can be connected with the square box assembly 400, broken rock stratum fragments can be temporarily stored in the cavity of the cylinder 500 through the material passing hole 110 in the rotary excavating process, the influence of the fragments on the rotary excavating efficiency can be avoided, and the fragments can be prevented from wearing the cylinder 500 on the outer wall of the cylinder 500.

Referring to fig. 4, it can be understood that the square box assembly 400 includes a box 410 and a top plate 420, the box 410 is hollow, a through connection shaft hole 411 is formed in a side wall, a plate surface of the top plate 420 is perpendicular to a central axis of the box 410 and is fixed on an end surface of the box 410 facing the cylinder 500, and an end of the cylinder 500 is connected with the top plate 420 such that a side edge of the top plate 420 contacts an inner wall of the cylinder 500.

The box 410 is hollow, and is convenient for inserting a drill rod of the rotary drilling machine, and the connecting shaft hole 411 is used for inserting a connecting shaft rod. Specifically, the drill rod of the rotary drilling machine is correspondingly provided with a hole, after the drill rod is inserted into the box body 410, the connecting shaft rod is inserted into the hole of the drill rod through the connecting shaft hole 411 to limit the relative movement of the drill rod and the box body 410, namely, the drill rod can drive the box body 410 to rotate and drive the box body 410 to move into the pile hole for rotary drilling. The cylinder 500 is connected with the box 410 through the top plate 420, the side edge of the top plate 420 is contacted with the inner wall of the cylinder 500, the contact part can be connected in a welding mode, the welding part is long, and the connection is reliable.

Further, a plurality of reinforcing plates 430 are provided on a surface of the top plate 420 facing the cylinder 500. The reinforcing plate 430 can resist the torque applied during rotary drilling of the drill bit, and can avoid the deformation of the top plate 420 due to stress.

It will be appreciated that the side walls of the case 410 are provided with a plurality of triangular ribs 440, and that the ribs 440 are secured to the edges of the case 410 and extend to connect with the top plate 420.

The rib plate 440 can improve the ability of the case 410 to resist torque deformation, and avoid deformation of the case 410 and fracture of the connecting weld during the rotary digging process. In addition, the gusset 440 extends to the top plate 420 where it can also be welded, reducing the risk of the top plate 420 and barrel 500 falling.

It is understood that the outer wall of the cylinder 500 is provided with a plurality of wear strips 510, and the plurality of wear strips 510 are circumferentially distributed.

The wear-resistant strip 510 can contact with the soil around the pile hole, and the wear-resistant strip 510 is worn preferentially to protect the outer wall of the cylinder 500, so that the cost for replacing the cylinder 500 is reduced.

The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.

Claims

1. A rotary drilling floor for use on a drill bit, comprising:

the base plate (100) is used for being arranged at the screwing-in end of the drill bit, and a material passing opening (110) is formed in the plate surface of the base plate (100);

the tooth head assembly is provided with a first end and a second end, the first end of the tooth head assembly is located on the outer side of the base plate (100), the second end of the tooth head assembly extends towards the center of the base plate (100), the tooth head assemblies are distributed around the circumference of the base plate (100), the tooth head assemblies are provided with rotary digging tooth heads (200), included angles a,50 degrees are smaller than 65 degrees, between the rotary digging tooth heads (200) and the surfaces of the base plate (100), and the heads of the rotary digging tooth heads (200) incline towards the rotation direction of a drill bit.

2. The rotary drilling floor for a drill bit of claim 1, wherein: the tooth head assembly further comprises a tooth plate (300), the two ends of the tooth plate (300) are a first end and a second end, a plurality of mounting grooves (310) are formed in one side edge of the tooth plate (300), the mounting grooves (310) are arranged along the direction from the first end to the second end, each mounting groove (310) is internally and fixedly provided with one rotary digging tooth head (200), one side edge, opposite to the mounting groove (310), of the tooth plate (300) is fixedly connected with the base plate (100), and an included angle is formed between the plate surface of the tooth plate (300) and the base plate (100), so that the angle setting of the rotary digging tooth head (200) is met.

3. A rotary drilling floor for use on a drill bit as claimed in claim 2, wherein: the toothed plate (300) is used for being connected with a lapping table (320) arranged on one side edge of the base plate (100), so that the toothed plate (300) is inserted into the material passing opening (110), the plate surface of the toothed plate (300) is in contact with the side edge of the material passing opening (110), and meanwhile the lapping table (320) is in contact with the plate surface of the base plate (100).

4. A rotary drilling floor for use on a drill bit as claimed in claim 2, wherein: the rotary pick head (200) comprises a clamping seat (210) and a pick (220), wherein the clamping seat (210) is provided with a plug-in cavity, the clamping seat (210) is fixedly arranged in the mounting groove (310), and the pick (220) is detachably plugged in the plug-in cavity of the clamping seat (210).

5. The rotary drilling floor for a drill bit of claim 1, wherein: the material passing openings (110) are arranged in a plurality, and the material passing openings (110) are distributed on the surface of the substrate (100) around the axis of the substrate (100).

6. A rotary drill bit, comprising:

the square box assembly (400), the square box assembly (400) is used for connecting a rotary excavator;

a cylinder (500), wherein a cavity is formed in the cylinder (500), one end of the cylinder (500) is connected with the square box assembly (400), and the other end of the cylinder is provided with the rotary digging bottom plate used on the drill bit according to any one of claims 1 to 5.

7. The rotary drill bit of claim 6, wherein: the square box assembly (400) comprises a box body (410) and a top plate (420), wherein the box body (410) is hollow, a through connecting shaft hole (411) is formed in the side wall of the box body, the plate surface of the top plate (420) is perpendicular to the central shaft of the box body (410), the box body (410) faces one side end face of the cylinder body (500), the end portion of the cylinder body (500) is connected with the top plate (420), and the side edge of the top plate (420) is in contact with the inner wall of the cylinder body (500).

8. The rotary drill bit of claim 7, wherein: a plurality of reinforcing plates (430) are further arranged on the surface of the side, facing the cylinder (500), of the top plate (420).

9. The rotary drill bit of claim 7, wherein: the side wall of the box body (410) is provided with a plurality of triangular rib plates (440), and the rib plates (440) are fixed on the edges of the box body (410) and extend to be connected with the top plate (420).

10. The rotary drill bit of claim 6, wherein: the outer wall of the cylinder body (500) is provided with a plurality of wear-resisting strips (510), and the wear-resisting strips (510) are circumferentially distributed.