A bridge construction drilling device

Abstract

The present invention relates to the technical field of drilling tools, and specifically to a drilling device for bridge construction, which includes a drill bit body. A drilling assembly is hinged to the bottom of the drill bit body. The drilling assembly includes a fixing plate hinged to the drill bit body. Two notch openings are symmetrically formed on the fixing plate. Inclined plates are fixedly arranged inside the two notch openings. A plurality of installation grooves are formed on each of the two inclined plates. Cutting teeth are arranged inside the plurality of installation grooves. The plurality of cutting teeth are cooperatively connected with the installation grooves through an adaptive adjustment assembly. The beneficial effects of the present invention are as follows: By setting the adaptive adjustment assembly, when drilling in soft soil layers, the contact area and cutting width between the cutting teeth and the soil layer can be increased, and the drilling speed can be improved. When encountering hard rock and soil and rotating counterclockwise, the cutting teeth swing inward and incline, so that the cutting teeth can better wedge into the interior of the hard rock and soil, avoiding the drill bit from stagnating in front of the hard rock. At the same time, the rough characteristics of the rock and soil surface are utilized to generate vibrations, which helps to break the hard rock and soil.

Description

Technical Field

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

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

[0003] A rotary drilling device for bridge construction disclosed in Chinese Patent Publication No. CN118029929B. During the rotation of the drill bit, the material guiding teeth can break the soil, which can not only accelerate the downward drilling of the drill bit, but also accelerate the entry of the soil into the feed slot.

[0004] However, compared with the prior art in the related field, when drilling deep and difficult-to-drill formations, especially when encountering alternating hard and soft, gravel-containing formations, the drill bit needs to be frequently replaced or the drilling speed needs to be reduced, which seriously affects the drilling efficiency. If drilling continues, the depth of the drill bit entering the formation changes frequently, and the circumferential and axial vibrations of the drill bit are intense. At this time, the cutting teeth of the drill bit bear large circumferential and axial impact loads, resulting in the chipping, damage of the drill bit, breakage and disconnection of the drill string, 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 art, and provide a drilling device for bridge construction.

[0006] The purpose of the present invention is achieved through the following technical solutions: A drilling device for bridge construction, including a drill bit body, a drilling assembly is hinged at the bottom of the drill bit body. The drilling assembly includes a fixing plate hinged to the drill bit body. Two notches are symmetrically opened on the fixing plate. In the interiors of the two notches, inclined plates are fixedly provided. A plurality of installation grooves are opened on each of the two inclined plates. Cutting teeth are arranged in the interiors of the plurality of installation grooves. The plurality of cutting teeth are cooperatively connected with the installation grooves through an adaptive adjustment assembly. When the drill bit body rotates in a drilling manner, by using the adaptive adjustment assembly, the cutting teeth are in an outward swinging state, so as to improve the drilling speed. When the drill bit body rotates in the opposite direction, by using the adaptive adjustment assembly, the cutting teeth are in an inward swinging and inclined state, so as to improve the crushing ability for hard rock and soil.

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

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

[0009] Further, guiding shafts are fixedly arranged on the inner wall of the fixed ring corresponding to the positions of the two guiding grooves, and an elastic member is fixedly arranged between the outer surface of the fixed shaft and the inner wall of the fixed ring.

[0010] Further, the support member includes a support area and a transition area. By the cooperation between the guiding shaft and the guiding groove, when the drill bit body rotates in opposite directions, the cutting teeth will swing inward and gradually incline. At this time, the transition area is used to prevent hard friction between the support member and the fixed ring.

[0011] Further, when the cutting teeth are in the state of swinging outward, the inner wall of the fixed ring fits with the support area. When the cutting teeth are in the state of swinging inward and inclining, a gap is left between the inner wall of the fixed ring and the transition area, and at the same time, the fixed ring will fit with the installation groove.

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

[0013] Further, insertion rods are inserted into both of the two inclined plates, and the insertion rods penetrate through a plurality of the installation grooves.

[0014] Further, insertion holes adapted to the insertion rods are formed in the inner wall of the fixed shaft, and the cross-section of the insertion rod is hexagonal.

[0015] Further, a rounded surface is formed at one end of the crushing part away from the fixed ring, and the part of the cutting part in contact with the rock and soil is V-shaped.

[0016] The beneficial effects of the present invention are as follows: By setting the adaptive adjustment component, when drilling in soft soil layers, the adaptive adjustment component makes the cutting teeth swing outward, increasing the contact area and cutting width between the cutting teeth and the soil layer, and enabling more effective cutting and excavation of soft soil, thus improving the drilling speed. When encountering hard rock and rotating counterclockwise, the cutting teeth swing inward and incline, so that the cutting teeth can better wedge into the hard rock mass, and the part for cutting during rotation during drilling is different, thereby improving the drilling efficiency in hard rock formations, avoiding the drill bit from stagnating in front of hard rock, and at the same time generating vibrations by using the rough characteristics of the rock and soil surface, which helps to break hard rock and overcome the hard rock resistance, reducing the risk of project delays and cost increases caused by the drill bit being trapped. Description of the Drawings

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic structural diagram of the drill bit body of the present invention;

[0019] Figure 2 It is a schematic diagram of the state when the drilling assembly of the present invention is closed;

[0020] Figure 3 It is a schematic diagram of the state when the drilling assembly of the present invention is opened;

[0021] Figure 4 It is a schematic diagram of the first perspective structure of the fixing plate when the drilling assembly of the present invention rotates forward;

[0022] Figure 5 It is a schematic diagram of the second perspective structure of the fixing plate when the drilling assembly of the present invention rotates forward;

[0023] Figure 6 It is a schematic diagram of the state of the cutting teeth when the drilling assembly of the present invention rotates forward;

[0024] Figure 7 It is a schematic diagram of the first perspective structure of the fixing plate when the drilling assembly of the present invention rotates backward;

[0025] Figure 8 It is a schematic diagram of the second perspective structure of the fixing plate when the drilling assembly of the present invention rotates backward;

[0026] Figure 9 It is a schematic diagram of the state of the cutting teeth when the drilling assembly of the present invention rotates backward;

[0027] Figure 10 It is a schematic diagram of the structure of the insertion rod of the present invention;

[0028] Figure 11 It is a schematic diagram of the structure of the adaptive adjustment component of the present invention.

[0029] In the figure: 1. Drill bit body; 2. Drilling assembly; 201. Fixing plate; 2011. Notch; 202. Inclined plate; 2021. Installation groove; 2022. Insertion rod; 203. Cutting teeth; 2031. Fixed ring; 2032. Crushing part; 2033. Cutting part; 3. Adaptive adjustment component; 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 implementation mode

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0031] The additional aspects and advantages of the present invention will be further given in the following description with reference to the accompanying drawings, and some will become obvious from the following description, or be understood through the practice of the present invention.

[0032] An embodiment of a bridge construction drilling device of the present invention is as follows Figures 1 to 11 shown, including a drill bit body 1. A drilling assembly 2 is hinged to the bottom of the drill bit body 1. A power mechanism (not shown in the figure) is provided inside the drill bit body 1. The power mechanism is used to control the opening or closing of the drilling assembly 2. The drilling assembly 2 includes a fixing plate 201 hinged to the drill bit body 1. Two notches 2011 are symmetrically formed on the fixing plate 201. Inclined plates 202 are fixedly provided inside the two notches 2011. A plurality of installation slots 2021 are formed on the two inclined plates 202. Cutting teeth 203 are provided inside the plurality of installation slots 2021. The plurality of cutting teeth 203 are all connected to the installation slots 2021 through an adaptive adjustment assembly 3 in a matching manner; when the drill bit body 1 rotates in a drilling manner, by using the adaptive adjustment assembly 3, the cutting teeth 203 are in an outward swinging state, so as to improve the drilling speed. The excess soil during drilling will enter the inside of the drill bit body 1 from the two notches 2011 on the fixing plate 201, so as to collect the excess soil. When it is necessary to discharge the soil inside the drill bit body 1, the drilling assembly 2 is controlled by the power mechanism to turn over and open. At this time, the soil will automatically separate from the inside of the drill bit body 1, and then the drilling assembly 2 is controlled by the power mechanism to close. When the drill bit body 1 rotates in the opposite direction, by using the adaptive adjustment assembly 3, the cutting teeth 203 are in an inward swinging and inclined state, so as to improve the crushing ability for hard rock and soil.

[0033] As shown in Figure 6 , Figure 9 and Figure 11 shown, the cutting teeth 203 include 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 at the bottom of the crushing part 2032. A rounded surface is formed at one end of the crushing part 2032 away from the fixing ring 2031. The part of the cutting part 2033 in contact with the rock and soil is V-shaped.

[0034] As shown in Figure 10 and Figure 11As shown in the figure, the adaptive adjustment component 3 includes a fixed shaft 301 installed inside the installation groove 2021. Plug rods 2022 are inserted into both inclined plates 202. The plug rods 2022 penetrate through multiple installation grooves 2021. A jack 3012 adapted to the plug rods 2022 is provided on the inner wall of the fixed shaft 301. The cross-section of the plug rods 2022 is hexagonal. Support members 302 are symmetrically and fixedly provided on the outer surface of the fixed shaft 301. Guide grooves 303 are provided on both support members 302. Guide shafts 304 are fixedly provided on the inner wall of the fixed ring 2031 corresponding to the positions of the two guide grooves 303. 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; As Figures 4 to 9 shown, the support member 302 includes a support area 3021 and a transition area 3022. By using 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 hard friction between the support member 302 and the fixed ring 2031; When the cutting teeth 203 are in the state of swinging outward, the inner wall of the fixed ring 2031 is in contact with the support area 3021. When the cutting teeth 203 are in the state of swinging inward and tilting, there is a gap between the inner wall of the fixed ring 2031 and the transition area 3022. At the same time, the fixed ring 2031 will be in contact with the installation groove 2021, thereby improving the stability of the cutting teeth 203 during operation; When the cutting teeth 203 are in the 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 fixed ring 2031.

[0035] To sum up: As Figure 2 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 11 shown, when the drill bit body 1 rotates in the opposite direction (for example, when the drill bit body 1 rotates in the drilling mode, it rotates clockwise, then the reverse rotation is counterclockwise), by using the adaptive adjustment component 3, the cutting teeth 203 are in the state of swinging inward and tilting, so as to improve the crushing ability of hard rock and soil (such as Figure 1 、 Figure 4 、 Figure 5 and Figure 6 shown, when the drill bit body 1 rotates in the reverse direction, the cutting part 2033 will gradually contact the rock and soil or soil, thereby causing the fixed ring 2031 to rotate inward. Then, by using 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 hard friction between the support member 302 and the fixed ring 2031), such as Figure 2 、 Figure 4 、 Figure 7 、 Figure 8, Figure 9 and Figure 11 As shown, when the cutting tooth 203 is in the state of swinging inward and tilting, the hard rock and soil can be obliquely cut through the cutting part 2033. At the same time, by utilizing the rough characteristics of the rock and soil surface, the cutting part 2033 can cause the whole cutting tooth 203 to vibrate slightly during the oblique cutting (such as Figure 4 , Figure 7 , Figure 8 , Figure 9 and Figure 11 As shown, when the cutting tooth 203 is in the state of swinging inward and tilting, there is a gap between the inner wall of the fixed ring 2031 and the transition region 3022. At the same time, the fixed ring 2031 will fit with the installation groove 2021. Thus, when the drill bit body 1 rotates in the opposite direction, by utilizing the cooperation between the cutting part 2033 and the rough surface of the rock and soil, the fixed ring 2031 compresses or pulls the elastic member 3011 and moves upward slightly. Then, after there is a slight gap between the cutting part 2033 and the rock and soil, by utilizing the elastic member 3011, the fixed ring 2031 can move downward slightly. And so on, the whole cutting tooth 203 can be continuously vibrated slightly), improving the crushing ability of the hard rock and soil, and thus facilitating the drill bit to continue to drill downward after getting out of trouble.

[0036] The drill bit body 1 and the power mechanism described in this application are well-known technologies in the technical field, so their specific structures and working principles are not described in detail.

[0037] The working process is as follows:

[0038] S1: As Figure 1 , Figure 2 , Figure 4 and Figure 11 As shown, during 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 the drilling mode, by utilizing the adaptive adjustment assembly 3, the cutting tooth 203 is in the state of swinging outward, so as to improve the drilling speed (as Figures 4 to 6 As shown, when the crushing part 2032 of the cutting tooth 203 contacts the soil, the crushing part 2032 will cause the fixed ring 2031 to rotate outward, so that the inner wall of the fixed ring 2031 fits with the supporting region 3021, thereby improving the stability of the fixed ring 2031 when the crushing part 2032 contacts the soil);

[0039] S2: As Figure 2 and Figure 3 As shown, the excess soil during drilling will enter the drill bit body 1 from the two notches 2011 on the fixing plate 201, so as to collect the excess soil;

[0040] S3: As Figure 1 and Figure 4As shown, when encountering hard rock and soil, the drill bit body 1 and the drilling assembly 2 are controlled to rotate in the reverse direction;

[0041] S4: As Figures 2 to 11 shown, when the drill bit body 1 rotates in the opposite direction (if the drill bit body 1 rotates clockwise when drilling, the reverse rotation is counterclockwise), the adaptive adjustment assembly 3 is used to make the cutting teeth 203 swing inward and be in an inclined state, so as to improve the crushing ability of hard rock and soil (as Figure 4 , Figure 7 , Figure 8 , Figure 9 and Figure 11 shown, when the drill bit body 1 rotates in the reverse direction, the cutting part 2033 will gradually contact the rock and soil or soil, thereby causing the fixing ring 2031 to rotate inward. Then, by using 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 hard friction between the support 302 and the fixing ring 2031), this oblique cutting method can make the cutting teeth 203 better wedge into the hard rock and soil interior, and at the same time, it is different from the part where the clockwise rotation cuts, so as to improve the drilling efficiency in the hard rock formation and avoid the drill bit from stagnating in front of the hard rock;

[0042] S5: As Figures 2 to 11 shown, when the cutting teeth 203 are in the state of swinging inward and tilting, the hard rock and soil can be obliquely cut through the cutting part 2033. At the same time, by using the rough characteristics of the rock and soil surface, the cutting part 2033 can make the whole cutting teeth 203 perform a small amount of jitter when obliquely cutting (as Figure 4 , Figure 7 , Figure 8 , Figure 9 and Figure 11 shown, when the cutting teeth 203 are in the state of swinging inward and tilting, there is a gap between the inner wall of the fixing ring 2031 and the transition area 3022. At the same time, the fixing ring 2031 will fit with the installation groove 2021. Thus, when the drill bit body 1 rotates in the opposite direction, by using the cooperation between the cutting part 2033 and the rough surface of the rock and soil, the fixing ring 2031 compresses or pulls the elastic member 3011 and moves upward slightly. Then, after there is a small amount of gap between the cutting part 2033 and the rock and soil, the elastic member 3011 can be used to make the fixing ring 2031 move downward slightly, and so on, so as to realize continuous small amount of jitter of the whole cutting teeth 203), improve the crushing ability of hard rock and soil, so as to facilitate the drill bit to continue to drill downward after getting out of trouble. Using the rough characteristics of the rock and soil surface to generate jitter helps to break hard rock and soil, overcome the hard rock resistance, and reduce the risk of project delay and cost increase caused by the drill bit being trapped;

[0043] S6: AsFigure 1 and Figure 4 As shown, after the descending speed and rotation speed of the drill bit body 1 return to normal, the drill bit body 1 can be controlled to rotate in a drilling manner, and the drilling assembly 2 is made to continue drilling into the soil layer;

[0044] S7: As Figures 2 to 4 shown, when it is necessary to discharge the soil inside the drill bit body 1, the drilling assembly 2 is controlled by the power mechanism to flip open. At this time, the soil will automatically separate from the inside of the drill bit body 1, and then the drilling assembly 2 is controlled by the power mechanism to close.

[0045] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within 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 soil; The cutting tooth (203) comprises a fixing ring (2031), a crushing portion (2032) is fixedly provided on the outer surface of the fixing ring (2031), and a cutting portion (2033) is fixedly provided on the bottom of the crushing portion (2032); 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 the two support members (302); 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).

2. A bridge construction drilling device according to claim 1, 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).

3. A bridge construction drilling device according to claim 2, 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).

4. A bridge construction drilling device according to claim 3, 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).

5. A bridge construction drilling device according to claim 4, 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).

6. A bridge construction drilling device according to claim 5, 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.

7. A bridge construction drilling device according to claim 6, characterized in that: An end of the crushing portion (2032) away from the fixing ring (2031) is formed with a rounded surface, and a portion of the cutting portion (2033) in contact with rock and soil is V-shaped.

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