Bridge construction drilling device

Abstract

The invention relates to the technical field of drilling tools, in particular to a bridge construction drilling device which comprises a drill bit body, a drilling assembly is hinged to the bottom of the drill bit body and comprises a fixing plate hinged to the drill bit body, two notches are symmetrically formed in the fixing plate, and inclined plates are fixedly arranged in the two notches. And a plurality of mounting grooves are formed in the two inclined plates, cutting teeth are arranged in the multiple mounting grooves, and the multiple cutting teeth are connected with the mounting grooves in a matched mode through self-adaptive adjusting assemblies. The self-adaptive drill bit has the beneficial effects that by arranging the self-adaptive adjusting assembly, when the self-adaptive drill bit drills into a soft soil layer, the contact area and the cutting width of the cutting teeth and the soil layer can be increased, the drilling speed is increased, and when the self-adaptive drill bit encounters hard rock soil and rotates anticlockwise, the cutting teeth swing inwards and incline, so that the cutting teeth can be better wedged into the hard rock soil; and meanwhile, shaking is generated by utilizing the rough characteristic of the surface of the rock and soil, and crushing of the hard rock and soil is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of drilling tools, in particular to a drilling device for bridge construction. Background Art

[0002] During the construction of bridge foundations, a drilling device is required to pre-position holes before driving the pile foundation.

[0003] A rotary drilling device for bridge construction is disclosed in Chinese patent publication number CN118029929B. In the rotary drilling device for bridge construction, during the rotation of the drill bit, the guide teeth can crush the soil, which can not only accelerate the drill bit to drill downward, but also accelerate the soil to enter the feed slot.

[0004] However, compared with the existing technologies in related fields, when drilling into deep and difficult-to-drill formations, especially when drilling into soft and hard interlaced and gravel-containing formations, the drill bit needs to be replaced frequently or the drilling speed needs to be reduced, which seriously affects the drilling efficiency. If drilling continues, the depth of the drill bit into the formation changes frequently, and the drill bit vibrates violently in the circumferential and axial directions. At this time, the drill bit cutting teeth are subjected to large circumferential and axial impact loads, resulting in drill bit tooth breakage, damage, drill bit breakage, and damage to other downhole tools and measuring instruments. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art, solve the problems mentioned in the background technology, and provide a drilling device for bridge construction.

[0006] The objective of the present invention is achieved through the following technical solutions: A bridge construction drilling device, comprising a drill bit body, a drilling assembly hinged at the bottom of the drill bit body, the drilling assembly comprising a fixed plate hinged to the drill bit body, two notches symmetrically provided on the fixed plate, inclined plates fixedly provided inside the two notches, a plurality of mounting grooves provided on the two inclined plates, cutting teeth provided inside the plurality of mounting grooves, and the plurality of cutting teeth being connected to the mounting grooves through an adaptive adjustment assembly; when the drill bit body rotates in a drilling manner, the adaptive adjustment assembly is utilized to make the cutting teeth swing outward, thereby increasing the drilling speed, and when the drill bit body rotates in the opposite direction, the adaptive adjustment assembly is utilized to make the cutting teeth swing inward and tilt, thereby increasing the crushing capacity of hard rock and soil.

[0007] Furthermore, the cutting tooth comprises a fixing ring, a crushing part is fixedly provided on the outer surface of the fixing ring, and a cutting part is fixedly provided on the bottom of the crushing part.

[0008] Furthermore, the adaptive adjustment component includes a fixed shaft installed inside the installation groove, and support members are symmetrically fixed on the outer surface of the fixed shaft, and guide grooves are formed on both of the two support members.

[0009] Furthermore, guide shafts are fixedly provided on the inner wall of the fixing ring at positions corresponding to the two guide grooves, and an elastic member is fixedly provided between the outer surface of the fixing shaft and the inner wall of the fixing ring.

[0010] Furthermore, the support member includes a supporting area and a transition area. By utilizing the cooperation between the guide shaft and the guide groove, when the drill bit body rotates in the opposite direction, the cutting teeth will swing inward and gradually tilt. At this time, the transition area is utilized to prevent hard friction between the support member and the fixing ring.

[0011] Furthermore, when the cutting tooth is in an outward swinging state, the inner wall of the fixing ring fits against the supporting area; when the cutting tooth is in an inward swinging and tilting state, a gap is left between the inner wall of the fixing ring and the transition area, and the fixing ring fits against the mounting groove.

[0012] Furthermore, when the cutting teeth are in a state of swinging inward and tilting, a chamfer is provided on a side of the support member close to the inner wall of the fixing ring.

[0013] Furthermore, two of the inclined plates are plugged with plug rods, and the plug rods pass through the plurality of mounting grooves.

[0014] Furthermore, an inner wall of the fixed shaft is provided with an insertion hole matched with the insertion rod, and the cross section of the insertion rod is hexagonal.

[0015] Furthermore, one end of the crushing portion away from the fixing ring is formed with a rounded surface, and the portion where the cutting portion contacts the rock and soil is V-shaped.

[0016] The beneficial effects of the present invention are as follows: by setting an adaptive adjustment component, when drilling into soft soil layers, the adaptive adjustment component causes the cutting teeth to swing outward, thereby increasing the contact area and cutting width between the cutting teeth and the soil layer, and being able to more effectively cut and excavate soft soil, thereby increasing the drilling speed; when encountering hard rock and soil and rotating counterclockwise, the cutting teeth swing inward and tilt, thereby enabling the cutting teeth to better wedge into the interior of the hard rock and soil, and being different from the position of rotating cutting during drilling, thereby being able to improve the drilling efficiency in hard rock formations, and avoiding the drill bit from stagnating in front of hard rock; at the same time, utilizing the rough characteristics of the rock and soil surface to generate jitter, it is helpful to break the hard rock and soil, overcome the resistance of hard rock, and reduce the risk of project delays and increased costs due to the drill bit being stuck. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 It is a structural schematic diagram of the drill bit body of the present invention; Figure 2 It is a schematic diagram of the state of the drilling assembly of the present invention when it is closed; Figure 3 It is a schematic diagram of the state of the drilling assembly of the present invention when it is opened; Figure 4 It is a schematic structural diagram of the fixing plate from a first perspective when the drilling assembly of the present invention rotates in a forward direction; Figure 5 It is a second perspective structural schematic diagram of the fixing plate when the drilling assembly of the present invention rotates in the forward direction; Figure 6 It is a schematic diagram of the state of the cutting teeth when the drilling assembly of the present invention rotates in the forward direction; Figure 7 It is a schematic structural diagram of the fixing plate from a first perspective when the drilling assembly of the present invention rotates in the reverse direction; Figure 8 A second perspective structural schematic diagram of the fixing plate when the drilling assembly of the present invention rotates in the reverse direction; Fig. 9 It is a schematic diagram of the state of the cutting teeth when the drilling assembly of the present invention rotates in the reverse direction; Fig.10 It is a structural schematic diagram of the plug rod of the present invention; Fig.11 It is a schematic diagram of the structure of the adaptive adjustment component of the present invention.

[0019] In the figure: 1. drill bit body; 2. drilling assembly; 201. fixing plate; 2011. notch; 202. inclined plate; 2021. mounting groove; 2022. insertion rod; 203. cutting tooth; 2031. fixing ring; 2032. crushing part; 2033. cutting part; 3. adaptive adjustment assembly; 301. fixed shaft; 3011. elastic member; 3012. insertion hole; 302. support member; 3021. support area; 3022. transition area; 3023. chamfer; 303. guide groove; 304. guide shaft. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Additional aspects and advantages of the present invention will be further given in the following description in conjunction with the accompanying drawings, and in part will become apparent from the following description, or may be learned through practice of the present invention.

[0022] An embodiment of a bridge construction drilling device of the present invention is as follows Figures 1 to 11 As shown, it includes a drill body 1, a drilling assembly 2 is hinged at the bottom of the drill body 1, a power mechanism (not shown in the figure) is arranged inside the drill body 1, and the power mechanism is used to control the opening or closing of the drilling assembly 2, and the drilling assembly 2 includes a fixed plate 201 hinged to the drill body 1, and two notches 2011 are symmetrically arranged on the fixed plate 201, and inclined plates 202 are fixed inside the two notches 2011, and multiple installation grooves 2021 are arranged on the two inclined plates 202, and cutting teeth 203 are arranged inside the multiple installation grooves 2021, and the multiple cutting teeth 203 are connected with the installation grooves 2021 through the adaptive adjustment assembly 3; when the drill body 1 is in a drilling manner, During rotation, the cutting teeth 203 are swung outward by utilizing the adaptive adjustment component 3, thereby increasing the drilling speed. During drilling, excess soil will enter the drill bit body 1 from the two slots 2011 on the fixed plate 201, thereby collecting the excess soil. When the soil inside the drill bit body 1 needs to be discharged, the drilling component 2 is flipped open by controlling the power mechanism, at which time the soil will automatically detach from the drill bit body 1, and then the drilling component 2 is closed by controlling the power mechanism. When the drill bit body 1 rotates in the opposite direction, the cutting teeth 203 are swung inward and tilted by utilizing the adaptive adjustment component 3, thereby increasing the crushing ability of hard rock and soil.

[0023] like Figure 6 , Fig. 9 and Fig.11 As shown, the cutting tooth 203 includes a fixing ring 2031, a crushing part 2032 is fixedly provided on the outer surface of the fixing ring 2031, a cutting part 2033 is fixedly provided on the bottom of the crushing part 2032, a rounded surface is formed on the end of the crushing part 2032 away from the fixing ring 2031, and the part where the cutting part 2033 contacts the rock and soil is V-shaped.

[0024] like Fig.10 and Fig.11As shown, the adaptive adjustment component 3 includes a fixed shaft 301 installed inside the installation groove 2021, and the two inclined plates 202 are plugged with plug rods 2022, and the plug rods 2022 penetrate multiple installation grooves 2021. The inner wall of the fixed shaft 301 is provided with a plug hole 3012 adapted to the plug rod 2022, and the cross section of the plug rod 2022 is a hexagon. The outer surface of the fixed shaft 301 is symmetrically fixed with support members 302, and the two support members 302 are provided with guide grooves 303. The inner wall of the fixed ring 2031 corresponds to the position of the two guide grooves 303. A guide shaft 304 is fixedly provided, and an elastic member 3011 is fixedly provided between the outer surface of the fixed shaft 301 and the inner wall of the fixed ring 2031; Figures 4 to 9 As shown, the support member 302 includes a support area 3021 and a transition area 3022. By utilizing the cooperation between the guide shaft 304 and the guide groove 303, when the drill body 1 rotates in the opposite direction, the cutting tooth 203 will swing inward and gradually tilt. At this time, the transition area 3022 can be used to prevent the support member 302 and the fixing ring 2031 from having hard friction; when the cutting tooth 203 is in a state of swinging outward, the inner wall of the fixing ring 2031 fits with the support area 3021, and when the cutting tooth 203 is in a state of swinging inward and tilting, a gap is left between the inner wall of the fixing ring 2031 and the transition area 3022, and the fixing ring 2031 will fit with the mounting groove 2021, thereby improving the stability of the cutting tooth 203 when working; when the cutting tooth 203 is in a state of swinging inward and tilting, a chamfer 3023 is provided on the side of the support member 302 close to the inner wall of the fixing ring 2031.

[0025] In summary: Figure 2 , Figure 4 , Figure 5 , Figure 6 and Fig.11 As shown in FIG. 1 , when the drill bit body 1 rotates in the opposite direction (e.g., the drill bit body 1 rotates clockwise when drilling, and the reverse rotation is counterclockwise), the cutting teeth 203 are swung inward and tilted by the adaptive adjustment component 3, thereby improving the crushing ability of hard rock and soil (e.g., Figure 1 , Figure 4 , Figure 5 and Figure 6 As shown in FIG. 1 , when the drill bit body 1 rotates in the reverse direction, the cutting portion 2033 will gradually contact the rock or soil, thereby causing the fixing ring 2031 to rotate inwardly. Then, by utilizing the cooperation between the guide shaft 304 and the guide groove 303, when the drill bit body 1 rotates in the opposite direction, the cutting teeth 203 will swing inwardly and gradually tilt. At this time, the transition area 3022 can prevent the support member 302 and the fixing ring 2031 from having hard friction). Figure 2 , Figure 4 , Figure 7 , Figure 8, Fig. 9 and Fig.11 As shown, when the cutting teeth 203 are in an inward swinging and tilting state, the hard rock and soil can be beveled by the cutting portion 2033, and at the same time, the roughness of the rock and soil surface is utilized so that the cutting portion 2033 can cause the cutting teeth 203 as a whole to vibrate slightly during bevel cutting (such as Figure 4 , Figure 7 , Figure 8 , Fig. 9 and Fig.11 As shown, when the cutting tooth 203 is in a state of swinging inward and tilting, a gap is left between the inner wall of the fixing ring 2031 and the transition area 3022, and the fixing ring 2031 will fit with the mounting groove 2021, so that when the drill body 1 rotates in the opposite direction, the cutting portion 2033 and the rough surface of the rock and soil are used to make the fixing ring 2031 compress or pull the elastic member 3011 and move upward slightly. Then, after a slight gap exists between the cutting portion 2033 and the rock and soil, the fixing ring 2031 can be moved downward slightly by using the elastic member 3011, and so on, so that the cutting tooth 203 can be continuously and slightly shaken as a whole, thereby improving the crushing ability of the hard rock and soil, thereby facilitating the drill bit to continue drilling downward after being freed.

[0026] The drill bit body 1 and the power mechanism described in the present application are well-known technologies in the technical field, so their specific structures and working principles are not described in detail.

[0027] The working process is as follows: S1: Figure 1 , Figure 2 , Figure 4 and Fig.11 As shown, when in use, the drilling assembly 2 is controlled by the drill bit body 1 to drill into the soil layer. When the drill bit body 1 rotates in a drilling manner, the cutting teeth 203 are swung outward by the adaptive adjustment assembly 3, thereby increasing the drilling speed (such as Figures 4 to 6 As shown, when the crushing portion 2032 of the cutting tooth 203 contacts the soil, the crushing portion 2032 causes the fixing ring 2031 to rotate outward, so that the inner wall of the fixing ring 2031 fits with the supporting area 3021, thereby improving the stability of the fixing ring 2031 when the crushing portion 2032 contacts the soil); S2: Figure 2 and Figure 3 As shown, when drilling, the excess soil will enter the inside of the drill bit body 1 from the two notches 2011 on the fixing plate 201, thereby collecting the excess soil; S3: Figure 1 and Figure 4 As shown, when encountering hard rock and soil, the drill bit body 1 and the drilling assembly 2 are controlled to rotate in the opposite direction; S4: Figures 2 to 11 As shown in FIG. 1 , when the drill bit body 1 rotates in the opposite direction (e.g., the drill bit body 1 rotates clockwise when drilling, and the reverse rotation is counterclockwise), the cutting teeth 203 are swung inward and tilted by the adaptive adjustment component 3, thereby improving the crushing ability of hard rock and soil (e.g., Figure 4 , Figure 7 , Figure 8 , Fig. 9 and Fig.11 As shown, when the drill bit body 1 rotates in the opposite direction, the cutting portion 2033 will gradually contact the rock or soil, thereby causing the fixing ring 2031 to rotate inward, and then by utilizing the cooperation between the guide shaft 304 and the guide groove 303, when the drill bit body 1 rotates in the opposite direction, the cutting teeth 203 will swing inward and gradually tilt. At this time, the transition area 3022 can be used to prevent the support member 302 and the fixing ring 2031 from having hard friction). This bevel cutting method can make the cutting teeth 203 better wedge into the hard rock and soil, and at the same time, it is different from the cutting position of the clockwise rotation, so as to improve the drilling efficiency in the hard rock formation and prevent the drill bit from stagnating in front of the hard rock. S5: Figures 2 to 11 As shown, when the cutting teeth 203 are in an inward swinging and tilting state, the hard rock and soil can be beveled by the cutting portion 2033, and at the same time, the roughness of the rock and soil surface is utilized so that the cutting portion 2033 can cause the cutting teeth 203 as a whole to vibrate slightly during bevel cutting (such as Figure 4 , Figure 7 , Figure 8 , Fig. 9 and Fig.11 As shown, when the cutting teeth 203 are in a state of swinging inward and tilting, a gap is left between the inner wall of the fixing ring 2031 and the transition area 3022, and the fixing ring 2031 will fit with the mounting groove 2021, so that when the drill bit body 1 rotates in the opposite direction, the cutting portion 2033 and the rough surface of the rock and soil are used to make the fixing ring 2031 compress or pull the elastic member 3011 and move upward slightly, and then after a slight gap exists between the cutting portion 2033 and the rock and soil, the fixing ring 2031 can be moved downward slightly by using the elastic member 3011, and so on, so that the cutting teeth 203 can be continuously and slightly shaken as a whole), improving the crushing ability of hard rock and soil, so as to facilitate the drill bit to continue to drill downward after being freed, and using the rough characteristics of the rock and soil surface to generate shaking, which is helpful to crush the hard rock and soil, overcome the resistance of the hard rock, and reduce the risk of engineering delays and cost increases caused by the drill bit being trapped; S6: Figure 1 and Figure 4 As shown, when the descending speed and rotation speed of the drill body 1 return to normal, the drill body 1 can be controlled to rotate in a drilling manner, and the drilling assembly 2 continues to drill into the soil layer; S7: Figures 2 to 4 As shown, when the soil inside the drill body 1 needs to be discharged, the drilling assembly 2 is flipped open by the power mechanism, and the soil will automatically separate from the inside of the drill body 1, and then the drilling assembly 2 is closed by the power mechanism.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A drilling device for bridge construction, characterized in that: The drill bit comprises a main body (1), a drilling assembly (2) being hinged at the bottom of the main body (1), the drilling assembly (2) comprising a fixing plate (201) hinged to the main body (1), two notches (211) being symmetrically provided on the fixing plate (201), an inclined plate (202) being fixedly provided inside the two notches (211), a plurality of mounting grooves (221) being provided on the two inclined plates (202), cutting teeth (203) being provided inside the plurality of mounting grooves (221), and the plurality of cutting teeth (203) being cooperatively connected to the mounting grooves (221) via an adaptive adjustment assembly (3); When the drill bit body (1) rotates in a drilling manner, the self-adaptive adjustment component (3) is used to make the cutting teeth (203) swing outward, thereby increasing the drilling speed; when the drill bit body (1) rotates in the opposite direction, the self-adaptive adjustment component (3) is used to make the cutting teeth (203) swing inward and tilt, thereby increasing the crushing ability of hard rock and soil.

2. A bridge construction drilling device according to claim 1, characterized in that: The cutting tooth (203) comprises a fixing ring (2031), a crushing portion (2032) being fixedly provided on the outer surface of the fixing ring (2031), and a cutting portion (2033) being fixedly provided on the bottom of the crushing portion (2032).

3. A bridge construction drilling device according to claim 2, characterized in that: The adaptive adjustment component (3) comprises a fixed shaft (301) installed inside the installation groove (2021), and support members (302) are symmetrically fixedly provided on the outer surface of the fixed shaft (301), and guide grooves (303) are provided on both of the two support members (302).

4. A bridge construction drilling device according to claim 3, characterized in that: A guide shaft (304) is fixedly provided on the inner wall of the fixing ring (2031) at positions corresponding to the two guide grooves (303), and an elastic member (3011) is fixedly provided between the outer surface of the fixing shaft (301) and the inner wall of the fixing ring (2031).

5. A bridge construction drilling device according to claim 4, characterized in that: The support member (302) comprises a support area (3021) and a transition area (3022). By utilizing the cooperation between the guide shaft (304) and the guide groove (303), when the drill bit body (1) rotates in the opposite direction, the cutting teeth (203) will swing inwards and gradually tilt. At this time, the transition area (3022) is utilized to prevent hard friction between the support member (302) and the fixing ring (2031).

6. A bridge construction drilling device according to claim 5, characterized in that: When the cutting tooth (203) is in an outward swinging state, the inner wall of the fixing ring (2031) fits with the supporting area (3021); when the cutting tooth (203) is in an inward swinging and tilting state, a gap is left between the inner wall of the fixing ring (2031) and the transition area (3022), and the fixing ring (2031) fits with the mounting groove (2021).

7. A bridge construction drilling device according to claim 6, characterized in that: When the cutting teeth (203) are in a state of swinging inwards and tilting, a chamfer (3023) is provided on one side of the support member (302) close to the inner wall of the fixing ring (2031).

8. A bridge construction drilling device according to claim 3, characterized in that: An insertion rod (2022) is inserted into each of the two inclined plates (202), and the insertion rod (2022) passes through the plurality of installation slots (2021).

9. A bridge construction drilling device according to claim 8, characterized in that: The inner wall of the fixed shaft (301) is provided with an insertion hole (3012) adapted to the insertion rod (2022); the insertion rod (2022) has a hexagonal cross section.

10. A bridge construction drilling device according to claim 2, characterized in that: One end of the crushing portion (2032) away from the fixing ring (2031) is formed with a rounded surface, and the portion of the cutting portion (2033) in contact with rock and soil is V-shaped.

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