Drill bit of slewing drilling machine

Abstract

The utility model relates to the technical field of drill bits, and particularly discloses a drill bit of a slewing drilling machine, which comprises a drill rod, a lower wing plate is arranged at one end of the drill rod, and a first hollow part is arranged on the lower wing plate; the supporting plate is arranged on the drill rod; one end of the upper wing plate is connected with the supporting plate, the other end of the upper wing plate is connected with the drill rod, and a second hollow part is formed among the upper wing plate, the supporting plate and the drill rod; wherein the upper wing plate is located above the lower wing plate, and the plane where the lower wing plate is located is perpendicular to the plane where the upper wing plate is located. Through the arrangement of the first hollow part and the second hollow part, the deslagging capacity of the drill bit can be effectively improved, and the drill bit is prevented from being blocked, so that the risk that the drill bit deforms due to drill pasting is reduced, and the service life of the drill bit is effectively prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of drill bits, in particular to a rotary drilling rig drill bit. Background Art

[0002] As pile foundation, bored cast-in-place piles have the characteristics of strong applicability, high bearing capacity, convenient construction, less impact on the environment, and no major difficulties in the construction of ultra-deep and ultra-long pile foundations. They are being used in more and more project constructions and are the most commonly used main pile type in pile foundation projects.

[0003] At present, when using traditional rotary drilling rig bits to drill in hard and high-plastic clay, the drill bit is prone to drill sticking, so the drill has to be lifted and cleaned before re-attaching the rod to drill, resulting in low hole-making efficiency; at the same time, it is difficult to convert all hard and high-plastic clay into mud using traditional rotary drilling rig bits, and some clay will form mud balls, which makes it difficult to remove all the mud balls during the second hole cleaning, forming a large amount of sediment, and easily causing pile breakage, mud inclusion, and core sandwiching during cast-in-place pile casting. Not only is the construction efficiency low and the construction period long, but the construction quality is also difficult to control.

[0004] The current Chinese utility model patent with patent number 202320177728.6 discloses a scraper drill bit for bored piles. Although it can improve the slag removal ability and drilling efficiency to a certain extent, the drill bit disclosed in this patent cannot completely solve the problem of drill sticking when drilling in hard and highly plastic clay. The sediment after the first hole is thicker, and it often takes a longer time for secondary hole cleaning. The overall hole-making efficiency is still low. Utility Model Content

[0005] In view of the above-mentioned deficiencies in the prior art, the purpose of the utility model is to provide a rotary drilling rig drill bit, which can effectively improve the slag removal ability of the drill bit and avoid drill bit blockage through the arrangement of the first hollow portion and the second hollow portion, thereby reducing the risk of drill bit deformation due to drill sticking, thereby effectively extending the service life of the drill bit.

[0006] The above technical objectives of the utility model are achieved through the following technical solutions:

[0007] A rotary drilling rig drill bit, comprising:

[0008] A drill rod, one end of which is provided with a lower wing plate, and the lower wing plate is provided with a first hollow portion;

[0009] A support plate, the support plate being arranged on the drill rod;

[0010] An upper wing plate, one end of which is connected to the support plate, and the other end of which is connected to the drill rod, and a second hollow portion is formed between the upper wing plate, the support plate and the drill rod;

[0011] Wherein, the upper wing plate is located above the lower wing plate, and the plane where the lower wing plate is located is perpendicular to the plane where the upper wing plate is located.

[0012] Compared with the prior art, the setting of the first hollow portion and the second hollow portion of the present application can effectively improve the slag discharge capacity of the drill bit, avoid drill bit blockage, reduce the risk of drill bit deformation due to drill sticking, and thus effectively extend the service life of the drill bit. The double-layer wing plate blade is formed by the setting of the upper wing plate and the lower wing plate, which simulates the guiding effect of the gauge ring to a large extent, so that the drill bit can maintain a good drilling effect in both sand layers and high-plasticity clay layers, reduce the jitter of the drill bit during drilling, make the drilling process smoother, and further improve the drilling efficiency.

[0013] As a preferred solution of the utility model, a plurality of lower drilling teeth are arranged on the lower wing plate.

[0014] As a preferred solution of the utility model, a plurality of lower drill teeth are evenly distributed in an array on the lower wing plate.

[0015] As a preferred solution of the utility model, a plurality of upper drilling teeth are arranged on the upper wing plate.

[0016] As a preferred solution of the utility model, a plurality of upper drill teeth are evenly distributed in an array on the upper wing plate.

[0017] As a preferred solution of the utility model, a flange is provided at one end of the drill rod away from the lower wing plate.

[0018] The above-mentioned rotary drilling rig drill bit has the following beneficial effects: first, by optimizing the traditional three-wing blade into an upper and lower double-layer wing blade, the drill bit can quickly cut the soil and convert it into mud when drilling in high-plasticity hard clay, so as to ensure the thickness of the sediment during the two hole cleanings, avoid the occurrence of broken piles, mud and core, and effectively improve the construction quality and efficiency; second, by means of the upper and lower double-layer wing blades, the guiding effect of the gauge ring is simulated to a large extent, so that the drill bit can maintain a good drilling effect in both the sand layer and the high-plasticity clay layer, reduce the jitter of the drill bit during the drilling process, make the drilling process more stable, improve the hole position accuracy and verticality, and further improve the drilling efficiency; third, by setting the first hollow part and the second hollow part, the slag removal capacity of the drill bit can be effectively improved, the drill bit can be avoided from being blocked, the stable cutting performance can be maintained during the drilling process, and the risk of deformation of the drill bit due to drill sticking can be reduced, thereby effectively extending the service life of the drill bit. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a rotary drilling rig drill bit of the utility model;

[0020] In the figure: 1. drill rod; 2. lower wing plate; 3. first hollow part; 4. support plate; 5. upper wing plate; 6. second hollow part; 7. lower drill tooth; 8. upper drill tooth; 9. flange.

[0021] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0024] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0025] The utility model provides a rotary drilling rig drill bit.

[0026] Reference Figure 1In one embodiment of the utility model, a rotary drilling rig drill bit comprises: a drill rod 1, a support plate 4 and an upper wing plate 5, wherein a lower wing plate 2 is welded to one end of the drill rod 1, and a first hollow portion 3 is formed on the lower wing plate 2; the support plate 4 is welded to the drill rod 1; one end of the upper wing plate 5 is welded to the support plate 4, and the other end is welded to the drill rod 1, and a second hollow portion 6 is formed between the upper wing plate 5, the support plate 4 and the drill rod 1; wherein the upper wing plate 5 is located above the lower wing plate 2, and the plane where the lower wing plate 2 is located is perpendicular to the plane where the upper wing plate 5 is located; it is worth noting that in this embodiment, two groups of support plates 4 and upper wing plates 5 are provided, and the two groups of support plates 4 and upper wing plates 5 are on the same plane. A plurality of lower drill teeth 7 are welded to the lower wing plate 2, and the plurality of lower drill teeth 7 are evenly distributed in an array on the lower wing plate 2. In this embodiment, eight lower drill teeth 7 are welded to the lower wing plate 2. In other embodiments, the number of lower drill teeth 7 can be increased or decreased according to actual needs, and the number of lower drill teeth 7 is not limited here. A plurality of upper drill teeth 8 are welded to the upper wing plate 5, and the plurality of upper drill teeth 8 are evenly distributed in an array on the upper wing plate 5. In this embodiment, six upper drill teeth 8 are welded to each upper wing plate 5. In other embodiments, the number of upper drill teeth 8 can be increased or decreased according to actual needs, and the number of upper drill teeth 8 is not limited here. A flange 9 is welded to the end of the drill rod 1 away from the lower wing plate 2.

[0027] The rotary drilling rig drill bit disclosed in the present application optimizes the traditional three-wing blades into upper and lower double-layer wing blades, so that when the drill bit is drilling in high-plasticity hard clay, it can quickly cut the soil and convert it into mud, so as to ensure the thickness of the sediment during the two hole cleanings, avoid the occurrence of broken piles, mud and core, and effectively improve the construction quality and efficiency; through the upper and lower double-layer wing blades, the guiding effect of the gauge ring is simulated to a large extent, so that the drill bit can maintain a good drilling effect in both sand layers and high-plasticity clay layers, reduce the jitter of the drill bit during the drilling process, make the drilling process more stable, improve the hole position accuracy and verticality, and further improve the drilling efficiency; through the arrangement of the first hollow part 3 and the second hollow part 6, the slag removal capacity of the drill bit can be effectively improved, the drill bit can be avoided from being blocked, and the stable cutting performance can be maintained during the drilling process, and the risk of deformation of the drill bit due to drill sticking is reduced, thereby effectively extending the service life of the drill bit.

[0028] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A rotary drilling rig drill bit, characterized in that: include: A drill rod, one end of which is provided with a lower wing plate, and the lower wing plate is provided with a first hollow portion; A support plate, the support plate being arranged on the drill rod; An upper wing plate, one end of which is connected to the support plate, and the other end of which is connected to the drill rod, and a second hollow portion is formed between the upper wing plate, the support plate and the drill rod; Wherein, the upper wing plate is located above the lower wing plate, and the plane where the lower wing plate is located is perpendicular to the plane where the upper wing plate is located.

2. The rotary drilling rig drill bit according to claim 1, characterized in that: A plurality of lower drilling teeth are arranged on the lower wing plate.

3. The rotary drilling rig drill bit according to claim 2, characterized in that: A plurality of lower drilling teeth are evenly distributed in an array on the lower wing plate.

4. The rotary drilling rig drill bit according to claim 1, characterized in that: A plurality of upper drilling teeth are arranged on the upper wing plate.

5. The rotary drilling rig drill bit according to claim 4, characterized in that: A plurality of upper drill teeth are evenly distributed in an array on the upper wing plate.

6. The rotary drilling rig drill bit according to claim 1, characterized in that: A flange is arranged at one end of the drill rod away from the lower wing plate.

Images