Rotary excavating drill bit

Abstract

The utility model discloses a rotary excavating drill bit and belongs to the technical field of drill bits, the rotary excavating drill bit comprises a fixing assembly and a cutting assembly, the cutting assembly is fixedly connected to the top of the fixing assembly, a rotating shaft is rotatably connected to one side of the bottom of the fixing assembly, a guide plate is fixedly connected to the top of the rotating shaft, and a fastening ring is fixedly connected to the top of the guide plate; the top of the cutting assembly is fixedly connected with a motor, the driving end of the motor penetrates through the bottom of the cutting assembly and then is fixedly connected with a cutting layer, the inner wall of the cutting layer is fixedly connected with a connecting block, the outer side of the connecting block is rotationally connected with a cutting knife, the middle of the back face of the cutting knife is fixedly connected with a front-end connecting piece, and the outer side of the front-end connecting piece is rotationally connected with a hydraulic rod. The tail end of the hydraulic rod is rotationally connected with a rear-end connecting piece, the rear-end connecting piece is fixedly connected to the inner wall of the cutting layer, the cutting layer is driven by the motor to rotate, the cutting knife conducts sliding cutting on the outer side of the old pile and can conduct rotary cutting towards the pile center under the action of the hydraulic rod, and the old pile can be effectively and flatly cut off.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of drill bits, in particular to a rotary drilling bit. BACKGROUND

[0002] In the field of construction engineering, with the continuous updating and reconstruction of infrastructure, the treatment of old piles has become a common and important task. In the past, traditional impact drills or manual pneumatic picks were often used for old pile removal operations.

[0003] The impact force of the traditional impact drill is single and difficult to accurately control when removing old piles, which often causes large disturbance to the soil around the pile body and affects the stability of the surrounding foundation. Moreover, this method has low operation efficiency and requires a large amount of time and labor cost, especially when facing large old piles or a large number of old piles that need to be treated, the construction period will be greatly lengthened, therefore, the present patent needs to be upgraded and modified on the basis of the existing technology. CONTENT OF THE UTILITY MODEL

[0004] In view of the shortcomings of the prior art, the present application provides a rotary drilling bit, which overcomes the shortcomings of the prior art and aims to solve the problem that the impact force of the traditional impact drill is single and difficult to accurately control when removing old piles, which often causes large disturbance to the soil around the pile body and affects the stability of the surrounding foundation.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a rotary drilling bit, comprising a fixing assembly and a cutting assembly, the cutting assembly is fixedly connected at the top of the fixing assembly, one side of the bottom of the fixing assembly is rotatably connected with a rotating shaft, the top of the rotating shaft is fixedly connected with a guide plate, the top of the guide plate is fixedly connected with a fastening ring, the top of the cutting assembly is fixedly connected with a motor, the driving end of the motor penetrates through the bottom of the cutting assembly and is fixedly connected with a cutting layer, the inner wall of the cutting layer is fixedly connected with a connecting block, the outer side of the connecting block is rotatably connected with a cutting knife, the middle of the back of the cutting knife is fixedly connected with a front end connector, the outer side of the front end connector is rotatably connected with a hydraulic rod, the end of the hydraulic rod is rotatably connected with a rear end connector, and the rear end connector is fixedly connected to the inner wall of the cutting layer.

[0006] By adopting the technical scheme, the fixing assembly is sleeved on the top of the old pile in use until the top of the old pile abuts against the top of the cutting layer, the fixed ring at the top of the guide plate is tightly attached to the outside of the old pile when the fixing assembly is sleeved on the old pile, so that the fixing assembly stably fixes the outside of the old pile, then the motor is started, the bottom cutting layer is rotated by the motor, the cutting knife connected to the cutting layer rotates in the cutting process, the cutting knife gradually rotates and cuts along the outside of the old pile to the center of the old pile, and the old pile is completely cut off.

[0007] As a preferred technical scheme of the present application, the bottom of the fixing assembly is fixedly connected with a lead screw, the outside of the lead screw is threadedly connected with a nut after penetrating through the top of the fixing assembly, and the nut is tightly attached to the extension position outside the top of the fixing assembly.

[0008] By adopting the technical scheme, the lead screw is provided with six groups of guide plates arranged at the bottom of the cutting assembly according to the circumference, so that the fixing assembly and the cutting assembly are stably connected, and the fixing assembly and the cutting assembly are also convenient to disassemble and maintain during maintenance.

[0009] As a preferred technical scheme of the present application, the outside of the guide plate is fixedly connected with a top connecting piece, the outside of the top connecting piece is rotatably connected with an extension rod, the end of the extension rod is rotatably connected with a bottom connecting piece, and the bottom connecting piece is fixedly connected to the inside of the fixing assembly.

[0010] By adopting the technical scheme, the extension rod is arranged in the fixing assembly, the extension rod is controlled to extend when the fixing assembly is sleeved on the old pile, so that the guide plate rotates along the rotating shaft to the center of the fixing assembly, and the fixed ring at the top of the guide plate is tightly attached to the outside of the old pile, so that the sliding during cutting is effectively prevented.

[0011] As a preferred technical scheme of the present application, the inside corner of the fixing assembly is fixedly connected with a water outlet pipe, the side bottom of the water outlet pipe is fixedly connected with a spray head, and the outside top of the water outlet pipe is fixedly connected with a connecting pipe, and the water inlet of the connecting pipe extends outward after penetrating through the fixing assembly.

[0012] By adopting the technical scheme, the water outlet of the water pump is connected to the connecting pipe, water enters the spray head through the water outlet pipe, the water outlet of the spray head is opposite to the cutting position of the cutting knife, water is sprayed to the cutting opening through the spray head, so that the dust during cutting is reduced and the cutting knife is cooled, so that the service life of the cutting knife is increased.

[0013] As a preferred technical solution of this application, a water suction pipe is fixedly connected at the inner corner of the fixed component, and a filter screen layer is fixedly connected at the bottom of the water suction pipe, wherein the filter screen layer extends to the bottom of the fixed component, and a connecting pipe is fixedly connected at the top of the outer side of the water suction pipe, and the outlet of the connecting pipe extends outward after passing through the fixed component.

[0014] By adopting the above technical solution, the water pump can be connected to the outlet of the connecting pipe. When spraying water to cool the cutting opening, the wastewater will be discharged downwards. At this time, the water pump is turned on, and the wastewater discharged downwards will be filtered through the cutting blade and enter the water suction pipe. Then, through the connecting pipe, it will be discharged into the water tank with storage by the water pump.

[0015] As a preferred technical solution of this application, the cutting blade has a tooth pitch on the side near the center of the cutting layer, and the tooth pitch of the outer side of the cutting blade is larger towards the end.

[0016] By adopting the above technical solution, a better cutting effect on the old piles can be guaranteed.

[0017] As a preferred technical solution of this application, the guide plate is fixedly connected to the cutting teeth on the side near the center of the cutting layer, wherein the cutting teeth are provided in three sets and are fixedly connected to the outside of the guide plate in an equidistant arrangement, and the fastening ring is a semi-circular arc structure.

[0018] By adopting the above technical solution, the setting of the cutting teeth provides good stability when fixing the old pile, while the semi-circular arc structure of the fastening ring ensures that the fastening ring can fit more tightly against the outside of the old pile.

[0019] As a preferred technical solution of this application, the cutting component is provided with a depth sensor, which is connected to the motor control system.

[0020] By adopting the above technical solution, during the cutting process, the depth sensor monitors the cutting depth of the cutting layer in real time, and automatically adjusts the motor speed and the extension length of the hydraulic rod according to the preset cutting depth, thereby realizing the function of automatically adjusting the cutting depth. This design improves the cutting accuracy and automation, reduces human operation errors, and improves work efficiency.

[0021] The beneficial effects of this application are:

[0022] The depth sensor in the cutting assembly can monitor the cutting depth in real time, the motor rotating speed and the hydraulic rod extension length are automatically adjusted according to the preset value, the automatic and accurate control of the cutting depth is realized, the manual operation error is greatly reduced, the cutting accuracy and the working efficiency are remarkably improved, compared with the traditional drill bit lacking in accurate control, the old pile cutting task can be completed in a shorter time and with high quality, the construction period is effectively shortened, and the construction cost is reduced

[0023] 2、The water outlet pipe and the spray head combination arranged in the inner angle of the drill bit fixing assembly can spray water to the cutting opening during cutting, dust generated during cutting is effectively reduced, the pollution of dust to the construction site environment and the surrounding atmosphere is reduced, meanwhile, the spraying of water plays a cooling role on the cutting knife, the service life of the cutting knife is prolonged, the design of the water suction pipe and the filter screen layer can collect sewage in time, avoid the sewage from flowing randomly on the construction site to cause muddy and other adverse conditions, on the one hand, the construction site is kept clean, on the other hand, the sewage can be concentratedly treated and recycled. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a front view structure schematic diagram of the application;

[0025] Figure 2 It is a side view structure schematic diagram of the application;

[0026] Figure 3 It is a cross-sectional rear view structure schematic diagram of the application;

[0027] Figure 4 It is a cross-sectional rear view structure schematic diagram of the application;

[0028] Figure 5 It is a cutting assembly overall structure schematic diagram in the application;

[0029] Figure 6 It is a fixed assembly overall structure schematic diagram in the application.

[0030] In the drawing: 1, fixed assembly; 2, cutting assembly; 3, rotating shaft; 4, guide plate; 5, cutting tooth; 6, fastening ring; 7, bottom connecting piece; 8, top connecting piece; 9, telescopic rod; 10, cutting layer; 11, connecting block; 12, cutting knife; 13, motor; 14, screw rod; 15, nut; 16, front end connecting piece; 17, hydraulic rod; 18, rear end connecting piece; 19, water suction pipe; 20, filter screen layer; 21, connecting pipe; 22, water outlet pipe; 23, spray head; 24, connecting pipe. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0032] Referring to Figures 1-6 A rotary drilling bit comprises a fixed assembly 1 and a cutting assembly 2, the cutting assembly 2 is fixedly connected at the top of the fixed assembly 1, the fixed assembly 1 is a hollow hexagonal structure, a rotating shaft 3 is rotatably connected at one side of the bottom of the fixed assembly 1, the rotating shaft 3 is provided with six groups of rotating shafts which are fixedly connected at the bottom of the fixed assembly 1 in sequence along the circumference, a guide plate 4 is fixedly connected at the top of the rotating shaft 3, a fastening ring 6 is fixedly connected at the top of the guide plate 4, a motor 13 is fixedly connected at the top of the cutting assembly 2, a cutting layer 10 is fixedly connected at the bottom of the cutting assembly 2, the cutting layer 10 is a cylindrical structure, the bottom of the cutting layer 10 is hollow, an adapter block 11 is fixedly connected at the inner wall of the cutting layer 10, a cutting knife 12 is rotatably connected at the outer side of the adapter block 11, a front end connecting piece 16 is fixedly connected at the middle of the back of the cutting knife 12, a hydraulic rod 17 is rotatably connected at the outer side of the front end connecting piece 16, a rear end connecting piece 18 is rotatably connected at the end of the hydraulic rod 17, and the rear end connecting piece 18 is fixedly connected at the inner wall of the cutting layer 10. In use, the fixed assembly 1 is sleeved on the top of the old pile until the top of the old pile abuts against the top of the cutting layer 10. Since the guide plate 4 is arranged in the fixed assembly 1, the fastening ring 6 at the top of the guide plate 4 abuts against the outer side of the old pile when the fixed assembly 1 is sleeved on the old pile, thereby stably fixing the fixed assembly 1 to the outer side of the old pile. Then, the motor 13 is started to rotate the cutting layer 10 at the bottom. The cutting knife 12 rotatably connected in the cutting layer 10 slides and cuts the outer side of the old pile during the rotation of the cutting layer 10. The cutting knife 12 is rotated around the adapter block 11 to the center of the cutting layer 10 by controlling the extension of the hydraulic rod 17 to drive the cutting knife 12. In this process, the cutting knife 12 is gradually rotated and cut along the outer side of the old pile to the center of the old pile until the old pile is completely cut and removed.

[0033] In the embodiment, as shown in Figure 1 - Figure 6 A lead screw 14 is fixedly connected at the bottom of the fixed assembly 1, the lead screw 14 is threadedly connected with a nut 15 at the top of the fixed assembly 1, and the nut 15 is tightly connected at the outer extension of the top of the fixed assembly 1. The lead screw 14 is provided with six groups of lead screws which are arranged at the bottom of the cutting assembly 2 in sequence along the circumference, thereby stably connecting the fixed assembly 1 and the cutting assembly 2, and facilitating disassembly and maintenance during maintenance.

[0034] In the embodiment, as shown in Figure 1- Figure 6 As shown in the figure, the outer side of the guide plate 4 is fixedly connected with the top connecting piece 8, the outer side of the top connecting piece 8 is rotatably connected with the telescopic rod 9, the end of the telescopic rod 9 is rotatably connected with the bottom connecting piece 7, and the bottom connecting piece 7 is fixedly connected to the inner side of the fixed assembly 1. By setting the telescopic rod 9 in the fixed assembly 1, the telescopic rod 9 is controlled to stretch when the old pile sleeve is set, so as to drive the guide plate 4 to rotate along the rotating shaft 3 to the center of the fixed assembly 1. At this time, the top fastening ring 6 of the guide plate 4 is tightly attached to the outer side of the old pile, so as to effectively prevent sliding during cutting.

[0035] In this embodiment, as shown in the figure, Figure 1 - Figure 6 As shown in the figure, the inner corner of the fixed assembly 1 is fixedly connected with the water outlet pipe 22, wherein the water outlet pipe 22 is provided with three groups of pipes which are fixedly connected to the inner wall of the fixed assembly 1 in sequence along the circumference. The side edge of the water outlet pipe 22 is fixedly connected with the nozzle 23 at the bottom position, and the outer side of the water outlet pipe 22 is fixedly connected with the connecting pipe 24 at the top position. The water inlet of the connecting pipe 24 extends outward after penetrating through the fixed assembly 1. After the water outlet of the water pump is connected to the connecting pipe 24, water enters the nozzle 23 through the water outlet pipe 22 at this time. The water outlet of the nozzle 23 is opposite to the cutting position of the cutting knife 12. Water is sprayed to the cutting opening through the nozzle 23 to reduce dust and cool it during cutting, thereby increasing the service life of the cutting knife 12.

[0036] In this embodiment, as shown in the figure, Figure 1 - Figure 6 As shown in the figure, the inner corner of the fixed assembly 1 is fixedly connected with the water suction pipe 19, and the bottom of the water suction pipe 19 is fixedly connected with the filter screen layer 20. The filter screen layer 20 extends to the bottom end of the fixed assembly 1. The outer side of the water suction pipe 19 is fixedly connected with the connecting pipe 21 at the top position. The water outlet of the connecting pipe 21 extends outward after penetrating through the fixed assembly 1. The water suction pump can be connected to the water outlet of the connecting pipe 21. When the cutting opening is cooled by water spraying, the sewage will be discharged downward. At this time, the water suction pump is started. The sewage discharged downward is filtered through the cutting knife 12 and enters the water suction pipe 19, and then passes through the connecting pipe 21 and is discharged into the water tank with storage through the water suction pump.

[0037] In this embodiment, as shown in the figure, Figure 1 - Figure 6 As shown in the figure, the cutting knife 12 is provided with a tooth pitch near the side of the cutting layer 10. The tooth pitch of the cutting knife 12 is larger at the end of the outer side, so as to ensure better cutting effect on the old pile.

[0038] In this embodiment, as shown in the figure, Figure 1 - Figure 6As shown, the guide plate 4 is fixedly connected with the cutting tooth 5 near the center of the cutting layer 10, wherein the cutting tooth 5 is provided with three groups of cutting teeth arranged at equal intervals on the outer side of the guide plate 4, and the clamping ring 6 is a semicircular arc structure, which has good stability when fixing the old pile through the setting of the cutting tooth 5, and the semicircular arc structure of the clamping ring 6 ensures that the clamping ring 6 can be more closely fitted on the outer side of the old pile.

[0039] In this embodiment, as shown in Figure 1 Figure 6 Figure 1 Figure 6 As shown, the cutting assembly 2 is provided with a depth sensor inside, and the depth sensor is connected with the control system of the motor 13. In the cutting process, the depth sensor monitors the cutting depth of the cutting layer 10 in real time, and automatically adjusts the rotating speed of the motor and the extension length of the hydraulic rod 17 according to the preset cutting depth, so as to realize the function of automatically adjusting the cutting depth. This design improves the cutting accuracy and automation degree, reduces the manual operation error, and improves the work efficiency.

[0040] ​Working principle: at the construction site, the rotary drill bit is hoisted above the old pile, the fixed assembly 1 is aligned with the old pile, then the rotary drill bit is lowered, the fixed assembly 1 is sleeved on the top of the old pile, until the top of the old pile contacts the top of the cutting layer 10, the telescopic rod 9 connected with the outside of the top connector 8 is started, the telescopic rod 9 is stretched, the guide plate 4 is rotated along the rotating shaft 3 to the center of the fixed assembly 1, the semicircular structure of the fixed ring 6 on the top of the guide plate 4 and the cutting tooth 5 outside it closely fit on the outside of the old pile, so that the fixed assembly 1 is stably fixed on the old pile, effectively preventing sliding during subsequent cutting process; the water pump outlet is connected to the connecting pipe 24 connected with the water outlet pipe 22 at the inner corner of the fixed assembly 1, and the water suction pump is connected to the water outlet of the connecting pipe 21 connected with the water suction pipe 19 at the inner corner of the fixed assembly 1, the motor 13 is started, the motor 13 drives the bottom cutting layer 10 to rotate, during the rotation of the cutting layer 10, the cutting knife 12 inside it starts to slide and cut on the outside of the old pile, during the cutting process, water enters the water outlet pipe 22 through the connecting pipe 24, and then is sprayed from the nozzle 23 at the bottom of the side of the water outlet pipe 22 to the cutting position of the cutting knife 12, reducing dust during cutting and cooling the cutting knife 12 to increase the service life of the cutting knife 12, at the same time, the sewage generated by cutting is discharged downward, the water suction pump is opened, the sewage is filtered into the water suction pipe 19 through the cutting knife 12, then passes through the connecting pipe 21, and finally is discharged into the storage tank through the water suction pump; the depth sensor inside the cutting assembly 2 monitors the cutting depth of the cutting layer 10 in real time, when the depth sensor detects that the cutting depth approaches the preset cutting depth, the depth sensor transmits a signal to the motor 13 control system, the motor 13 control system automatically adjusts the rotating speed of the motor according to the received signal, so that it is appropriately reduced, and at the same time, the extension length of the hydraulic rod 17 is automatically adjusted, the hydraulic rod 17 is rotationally connected with the cutting knife 12 through the front end connector 16 and is fixedly connected with the inner wall of the cutting layer 10 through the rear end connector 18, drives the cutting knife 12 to rotate around the connecting block 11 to the center of the cutting layer 10, the cutting knife 12 rotates and cuts along the outside of the old pile to the center of the old pile, until the old pile is completely cut off.

[0041] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A rotary excavator bit comprising a fixed assembly (1) and a cutting assembly (2), characterized in that, The cutting assembly (2) is fixedly connected at the top of the fixed assembly (1), one side of the bottom of the fixed assembly (1) is rotatably connected with a rotating shaft (3), the top of the rotating shaft (3) is fixedly connected with a guide plate (4), the top of the guide plate (4) is fixedly connected with a fastening ring (6), the top of the cutting assembly (2) is fixedly connected with a motor (13), the driving end of the motor (13) penetrates through the bottom of the cutting assembly (2) and is fixedly connected with a cutting layer (10), the inner wall of the cutting layer (10) is fixedly connected with a connecting block (11), the outer side of the connecting block (11) is rotatably connected with a cutting knife (12), the back middle position of the cutting knife (12) is fixedly connected with a front connecting piece (16), the outer side of the front connecting piece (16) is rotatably connected with a hydraulic rod (17), the tail end of the hydraulic rod (17) is rotatably connected with a rear connecting piece (18), and the rear connecting piece (18) is fixedly connected to the inner wall position of the cutting layer (10).

2. The rotary drill bit of claim 1, wherein, The bottom of the fixed assembly (1) is fixedly connected with a lead screw (14), the outer side of the lead screw (14) is threadedly connected with a nut (15) after penetrating through the top of the fixed assembly (1), and the nut (15) is tightly attached to the outer extension position of the top of the fixed assembly (1).

3. The rotary drill bit of claim 1, wherein, The outer side of the guide plate (4) is fixedly connected with a top connecting piece (8), the outer side of the top connecting piece (8) is rotatably connected with a telescopic rod (9), the tail end of the telescopic rod (9) is rotatably connected with a bottom connecting piece (7), and the bottom connecting piece (7) is fixedly connected to the inner side position of the fixed assembly (1).

4. The rotary drill bit of claim 1, wherein, The inner corner position of the fixed assembly (1) is fixedly connected with a water outlet pipe (22), the side bottom position of the water outlet pipe (22) is fixedly connected with a spray head (23), and the top position of the outer side of the water outlet pipe (22) is fixedly connected with a connecting pipe (24), and the water inlet of the connecting pipe (24) penetrates through the fixed assembly (1) and extends outward.

5. The earth boring bit of claim 1 wherein, The inner corner position of the fixed assembly (1) is fixedly connected with a water suction pipe (19), the bottom position of the water suction pipe (19) is fixedly connected with a filter screen layer (20), wherein the filter screen layer (20) extends to the bottom end of the fixed assembly (1), the top position of the outer side of the water suction pipe (19) is fixedly connected with a connecting pipe (21), and the water outlet of the connecting pipe (21) penetrates through the fixed assembly (1) and extends outward.

6. The earth boring bit of claim 1 wherein, The cutting knife (12) is provided with a tooth pitch on the side close to the center of the cutting layer (10), and the tooth pitch of the cutting knife (12) is larger at the tail end.

7. The earth boring bit of claim 1 wherein, The guide plate (4) is fixedly connected with a cutting tooth (5) on the side close to the center of the cutting layer (10), and the fastening ring (6) is a semicircular arc structure.

8. The rotary drill bit of claim 1, wherein, The cutting assembly (2) is provided with a depth sensor, and the depth sensor is connected with the control system of the motor (13).

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