Rotary excavating squeezing and expanding drill bit

Abstract

The invention belongs to the technical field of drill bits, and particularly relates to a rotary excavating squeezing and expanding drill bit which is characterized in that a drill bit connecting pipe is fixedly connected to the upper end of an outer cylinder, a mounting disc is rotatably arranged at the bottom of an inner cavity of the outer cylinder, a plurality of sliding grooves are formed in the mounting disc in the radial direction, adjusting rods are slidably connected to the sliding grooves, and excavating teeth are fixedly connected to one ends of the adjusting rods; the inner cavity of the outer cylinder is further provided with a shape-adaptive cleaning and brushing mechanism used for removing soil attached to the surfaces of the digging teeth. By means of the shape-adaptive cleaning and brushing mechanism, after one-time rotary excavating work is finished, soil attached to the surfaces of the multiple excavating teeth can be removed, and the situation that due to the fact that soil is attached to the surfaces of the excavating teeth for a long time, the soil is prone to caking on the surfaces of the excavating teeth, the excavating teeth are passivated, and then the cutting effect of the excavating teeth and a soil layer in the follow-up using process is affected is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of drill bits, and specifically relates to a rotary drilling and expanding drill bit. Background Art

[0002] A rotary drilling and expanding drill bit is a core drilling tool used in rotary drilling rig construction to expand the diameter of a pile hole and improve the bearing capacity of a pile foundation. By performing an expanding operation in a drilled pile hole, the local or overall diameter of the pile hole is expanded to form an enlarged head or a special-shaped pile hole.

[0003] The patent with the publication number CN215520777U discloses a rotary hole-expanding drill bit, specifically related to the technical field of drill bits, including a protective outer cylinder. The top end of the protective outer cylinder is fixedly connected with a drill bit connection pipe, and a plurality of strengthening members are arranged at the connection between the protective outer cylinder and the drill bit connection pipe. The drill bit connection pipe communicates with the protective outer cylinder, and an electric hydraulic rod is installed at the top end of the inner cavity of the drill bit connection pipe. This patent is provided with alloy steel parts, pressing plates, and two clamping blocks. The clamping plate is extruded with the alloy steel parts, and the alloy steel parts and the protective outer cylinder are outwardly movable through a pin shaft, and the digging teeth are outwardly opened, increasing the rotary drilling diameter and facilitating the adjustment of the rotary drilling diameter size to meet the use requirements. A positioning block, a hollow limiting block, a spring, a spiral limiting groove, and a guiding groove are provided. The hollow limiting block reaches the spiral limiting groove along the guiding groove, and one end of the positioning block enters the internal positioning hole, realizing the quick installation of the drill bit connection pipe and the installation joint and being easy to disassemble and replace.

[0004] However, the above technical solution still has the following deficiencies in actual application:

[0005] A rotary drilling operation is carried out using the digging teeth. However, during the working process of the digging teeth, soil will adhere to their surfaces. If the soil adheres to the surfaces of the digging teeth for a long time, the soil is likely to form lumps on the surfaces of the digging teeth, resulting in the dulling of the digging teeth and further affecting the cutting effect of the digging teeth with the soil layer during subsequent use. Summary of the Invention

[0006] In order to make up for the deficiencies of the prior art and solve at least one technical problem proposed in the background art, the present invention proposes a rotary drilling and expanding drill bit.

[0007] The technical solution adopted by the present invention to solve its technical problems is: a rotary drilling and expanding drill bit, including an outer cylinder. The upper end of the outer cylinder is fixedly connected with a drill bit connection pipe. An installation disk is rotatably arranged at the bottom of the inner cavity of the outer cylinder. A plurality of sliding grooves are arranged radially on the installation disk. An adjusting rod is slidably connected at the sliding groove. One end of the adjusting rod is fixedly connected with a digging tooth. A shape-adaptive cleaning mechanism for removing the soil adhering to the surface of the digging tooth is further arranged in the inner cavity of the outer cylinder;

[0008] The shape - adapted cleaning mechanism includes a fixing plate fixedly connected to the upper side of the inner cavity wall of the outer cylinder. A rotating plate is rotatably arranged in the middle of the lower end face of the fixing plate. One side of the lower end face of the rotating plate is fixedly connected with a cylinder. The piston end of the cylinder is fixedly connected with a lifting plate. Both sides of the lower end face of the lifting plate are fixedly connected with sleeves. The sleeves are slidably connected with sliding rods. The lower ends of the sliding rods are fixedly connected with a reciprocating plate. Both the left and right sides of the lower end face of the reciprocating plate are fixedly connected with a first connecting plate. Both sides of the lower end of the first connecting plate are slidably connected with a first sliding column.

[0009] Preferably, a second motor is fixedly connected to one side of the bottom of the outer cylinder. The output end of the second motor is fixedly connected to one side of the mounting plate. One end of the first sliding column is fixedly connected with a second brush plate. Both the front and rear sides of the lower end face of the reciprocating plate are fixedly connected with a second connecting plate. Both sides of the lower end of the second connecting plate are slidably connected with a second sliding column. One end of the second sliding column is fixedly connected with a third brush plate.

[0010] Preferably, a support plate is fixedly connected to one side of the upper end face of the mounting plate. A first motor is fixedly connected to the middle of the upper end face of the support plate. The output end of the first motor is fixedly connected with a threaded rod. The upper end of the threaded rod is rotatably arranged on the support plate, and the lower end is rotatably arranged on the mounting plate. The threaded rod is threadedly connected with a threaded block. One end of the adjusting rod is rotatably connected with a first connecting rod. One end of the first connecting rod is rotatably connected with the threaded block.

[0011] Preferably, a third motor is fixedly connected to the middle of the upper end face of the fixing plate. The output end of the third motor is fixedly connected to one end of the rotating plate. One side of the front end face of the lifting plate is rotatably connected with a second connecting rod. One end of the second connecting rod is rotatably connected with a third connecting rod. One end of the third connecting rod is rotatably connected with one side of the reciprocating plate.

[0012] Preferably, a fourth motor is fixedly connected to one side of the lower end of the lifting plate. The output end of the fourth motor is fixedly connected to one end of the second connecting rod.

[0013] Preferably, a fourth spring is sleeved on one end of the first sliding column. One end of the fourth spring is fixedly connected with the second brush plate, and the other end is fixedly connected with the first connecting plate.

[0014] Preferably, a third spring is sleeved on one end of the second sliding column. One end of the third spring is fixedly connected with the second connecting plate, and the other end is fixedly connected to the end of the second sliding column.

[0015] Preferably, a water inlet pipe penetrates through one of the first connecting plates. One end of the water inlet pipe penetrates through and is fixedly connected to one side of the outer cylinder. The part of the water inlet pipe penetrating through the outer cylinder is made of a rigid material, and the rest is made of an elastic material.

[0016] Preferably, a synchronous cleaning component is also arranged on the adjusting rod;

[0017] The synchronous cleaning component includes two first brush plates slidably connected to one side of the adjusting rod. A second spring is fixedly connected between the two first brush plates, and the brush end of the first brush plate is attached to the inner side of the chute.

[0018] Preferably, an installation joint is inserted into the drill bit connection pipe. Positioning blocks are slidably connected to both sides of the upper end of the drill bit connection pipe. The positioning blocks are inserted into the positioning holes at the upper end of the installation joint. One end of the positioning block is fixedly connected to a first spring, and the other end of the first spring is fixedly connected to the drill bit connection pipe.

[0019] The beneficial effects of the present invention are as follows:

[0020] 1. For the rotary drilling and expanding drill bit of the present invention, by using the shape-adaptive cleaning mechanism, after one rotary drilling operation is completed, the adhesion of soil on the surfaces of multiple cutting teeth can be removed, avoiding the situation that soil easily forms lumps on the surfaces of the cutting teeth due to long-term attachment, resulting in dulling of the cutting teeth and thus affecting the cutting effect with the soil layer during subsequent use of the cutting teeth. Moreover, after the cleaning work of each cutting tooth is completed, the second brush plate and the third brush plate are driven to vibrate, thereby shaking off the soil adhered to the brush ends of the two, and thus realizing the self-cleaning of the soil adhered to the brush ends of the second brush plate and the third brush plate, avoiding the situation that the subsequent cleaning effect is affected due to the adhesion of soil to the brush ends of the second brush plate and the third brush plate.

[0021] 2. For the rotary drilling and expanding drill bit of the present invention, by using the synchronous cleaning component, by driving the adjusting rod to slide at the chute, the brush end of the first brush plate cleans the inner wall of the chute, thereby realizing the removal of the adhered soil on the inner wall of the chute, avoiding the situation that when the soil passes through the chute, the movement of the adjusting rod and the subsequent water flow are affected due to the adhesion of soil to the inner wall of the chute.

[0022] 3. For the rotary drilling and expanding drill bit of the present invention, it is fixed to the rotary drilling machine through the installation joint. The drill bit connection pipe is inserted into the inner cavity of the installation joint. The positioning block will retract due to the extrusion of the inner wall of the installation joint. When the positioning block reaches the positioning hole, it will reset under the action of the first spring, so that the positioning block is inserted into the positioning hole, thereby realizing the rapid installation of the drill bit connection pipe and the installation joint, and being easy to disassemble and replace. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below with reference to the accompanying drawings.

[0024] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0025] Figure 2 is a three-dimensional structural schematic diagram of a half-section of the outer cylinder and the installation joint;

[0026] Figure 3 is Figure 2Partial enlarged view at A in the figure;

[0027] Figure 4 It is a schematic three-dimensional structure diagram of the reciprocating plate;

[0028] Figure 5 It is a schematic three-dimensional structure diagram of the mounting plate;

[0029] Figure 6 It is a schematic three-dimensional structure diagram of the adjusting rod;

[0030] Figure 7 It is Figure 6 Partial enlarged view at B in the figure;

[0031] Figure 8 It is a schematic three-dimensional structure diagram of the fixing plate;

[0032] Figure 9 It is a schematic semi-sectional structure diagram of the drill bit connection pipe;

[0033] Figure 10 It is a schematic three-dimensional structure diagram of the digging tooth;

[0034] Figure 11 It is a schematic three-dimensional structure diagram of the lifting plate.

[0035] In the figure: 1. Outer cylinder; 2. Installation joint; 3. Drill bit connection pipe; 4. Digging tooth; 5. Adjusting rod; 6. Motor 1; 7. Support plate; 8. Mounting plate; 9. Motor 2; 10. Positioning hole; 11. Positioning block; 12. Threaded block; 13. Link 1; 14. Slide groove; 15. Spring 1; 16. Fixing plate; 17. Motor 3; 18. Rotating plate; 19. Cylinder; 20. Lifting plate; 21. Sleeve; 22. Slide rod; 23. Water inlet pipe; 24. Connecting plate 1; 25. Connecting plate 2; 26. Motor 4; 27. Link 2; 28. Link 3; 29. Brush plate 1; 30. Spring 2; 31. Reciprocating plate; 32. Brush plate 2; 33. Brush plate 3; 34. Slide column 1; 35. Spring 4; 36. Slide column 2; 37. Spring 3; 38. Threaded rod. Specific implementation manner

[0036] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0037] Please refer to Figures 1-11, the present invention provides a technical solution: a rotary drilling and expanding bit, including an outer cylinder 1, a bit connecting pipe 3 is fixedly connected to the upper end of the outer cylinder 1, a mounting plate 8 is rotatably arranged at the bottom of the inner cavity of the outer cylinder 1, a plurality of sliding grooves 14 are arranged radially on the mounting plate 8, an adjusting rod 5 is slidably connected at the sliding groove 14, a digging tooth 4 is fixedly connected to one end of the adjusting rod 5, and a shape-adaptive cleaning mechanism for removing the soil adhered to the surface of the digging tooth 4 is further arranged in the inner cavity of the outer cylinder 1;

[0038] The shape-adaptive cleaning mechanism includes a fixing plate 16 fixedly connected to the upper side of the inner cavity wall of the outer cylinder 1, a rotating plate 18 is rotatably arranged in the middle of the lower end face of the fixing plate 16, a cylinder 19 is fixedly connected to one side of the lower end face of the rotating plate 18, a lifting plate 20 is fixedly connected to the piston end of the cylinder 19, sleeves 21 are fixedly connected to both sides of the lower end face of the lifting plate 20, a sliding rod 22 is slidably connected to the sleeve 21, a reciprocating plate 31 is fixedly connected to the lower end of the sliding rod 22, connecting plates one 24 are fixedly connected to the left and right sides of the lower end face of the reciprocating plate 31, and sliding columns one 34 are slidably connected to both sides of the lower end of the connecting plate one 24.

[0039] In this embodiment, as Figures 1-6 , Figure 8 , Figure 10 , Figure 11 shown, a motor two 9 is fixedly connected to one side of the bottom of the outer cylinder 1, the output end of the motor two 9 is fixedly connected to one side of the mounting plate 8, a brush plate two 32 is fixedly connected to one end of the sliding column one 34, connecting plates two 25 are fixedly connected to the front and rear sides of the lower end face of the reciprocating plate 31, sliding columns two 36 are slidably connected to both sides of the lower end of the connecting plate two 25, and a brush plate three 33 is fixedly connected to one end of the sliding column two 36.

[0040] A support plate 7 is fixedly connected to one side of the upper end face of the mounting plate 8, a motor one 6 is fixedly connected to the middle of the upper end face of the support plate 7, a threaded rod 38 is fixedly connected to the output end of the motor one 6, the upper end of the threaded rod 38 is rotatably arranged on the support plate 7, the lower end is rotatably arranged on the mounting plate 8, a threaded block 12 is threadedly connected to the threaded rod 38, one end of the adjusting rod 5 is rotatably arranged with a connecting rod one 13, and one end of the connecting rod one 13 is rotatably connected to the threaded block 12.

[0041] A motor three 17 is fixedly connected to the middle of the upper end face of the fixing plate 16, the output end of the motor three 17 is fixedly connected to one end of the rotating plate 18, a connecting rod two 27 is rotatably arranged on one side of the front end face of the lifting plate 20, one end of the connecting rod two 27 is rotatably arranged with a connecting rod three 28, and one end of the connecting rod three 28 is rotatably connected to one side of the reciprocating plate 31.

[0042] A motor four 26 is fixedly connected to one side of the lower end of the lifting plate 20, and the output end of the motor four 26 is fixedly connected to one end of the connecting rod two 27.

[0043] One end of the sliding column 34 is sleeved with a fourth spring 35. One end of the fourth spring 35 is fixedly connected to the second brush plate 32, and the other end is fixedly connected to the first connecting plate 24.

[0044] One end of the sliding column 36 is sleeved with a third spring 37. One end of the third spring 37 is fixedly connected to the second connecting plate 25, and the other end is fixedly connected to the end of the sliding column 36.

[0045] A water inlet pipe 23 is disposed through the first connecting plate 24 on one side. One end of the water inlet pipe 23 penetrates and is fixedly connected to one side of the outer cylinder 1. The part of the water inlet pipe 23 penetrating the outer cylinder 1 is made of a rigid material, and the rest is made of an elastic material.

[0046] Specifically, when the existing rotary drilling and expanding bit is in use, the digging teeth 4 are used for rotary drilling operations. However, during the working process of the digging teeth 4, soil will adhere to their surfaces. If the soil adheres to the surfaces of the digging teeth 4 for a long time, the soil is likely to form lumps on the surfaces of the digging teeth 4, resulting in the dulling of the digging teeth 4, and further affecting the cutting effect of the digging teeth 4 on the soil layer during subsequent use.

[0047] Therefore, to solve the above problems, during the use of this embodiment, the outer cylinder 1 is driven to rotate by a rotary drilling machine, and the digging teeth 4 are used for rotary drilling. At the same time, the motor 1 6 can drive the threaded rod 38 to rotate, so as to drive the threaded block 12 to move up and down. When the threaded block 12 moves up and down, it will drive a plurality of first connecting rods 13 to rotate simultaneously. When the first connecting rods 13 rotate, their ends will drive the adjusting rod 5 to slide at the sliding groove 14, adjusting the distance between the digging teeth 4 and the axis of the mounting disc 8, thereby realizing the adjustment of the rotary drilling diameter and meeting different usage requirements.

[0048] When one rotary excavation work is completed, the digging tooth 4 is driven to move again so that the digging tooth 4 is close to the axis of the mounting plate 8. At this time, the motor 2 9 is used to drive the mounting plate 8 to rotate 180 degrees, so that the digging tooth 4 can enter the inner cavity of the outer cylinder 1, and then the upper end of the water inlet pipe 23 is connected with the external water pipe, and the rotating plate 18 is driven to rotate by the motor 3 17, so that the reciprocating plate 31 is in turn above each digging tooth 4, and then the cylinder 19 is used to drive the lifting plate 20 to descend until the brush plate 2 32 and the brush plate 3 33 are in contact with the surface of the digging tooth 4, and the brush plate 2 32 and the brush plate 3 33 will fit tightly with the surface of the digging tooth 4 under the action of the spring 4 35 and the spring 3 37, and can adapt to the The shape of the digging teeth 4 changes, so that all positions on the surface of the digging teeth 4 can be cleaned, and the dirt adhering to the surface of the digging teeth 4 can be removed. At the same time, the external water pipe passes the cleaning water into the water inlet pipe 23, and sprays it out from the end of the water inlet pipe 23 to rinse the surface of the digging teeth 4, and then repeats the above operation until all the digging teeth 4 are cleaned, and the cleaning water will be discharged from the chute 14 and will not accumulate in the inner cavity of the outer cylinder 1, thereby achieving the removal of dirt adhering to the surfaces of multiple digging teeth 4, avoiding the situation that the dirt is easily attached to the surface of the digging teeth 4 for a long time, and the dirt is easy to form agglomerations on the surface of the digging teeth 4, resulting in the passivation of the digging teeth 4, thereby affecting the cutting effect of the digging teeth 4 with the soil layer when they are used later;

[0049] Although the above method can be used to remove the dirt on the surface of the digging tooth 4, when the bristle ends of the brush plates 2 32 and 33 come into contact with the surface of the digging tooth 4, dirt may adhere to them, thereby affecting the subsequent cleaning effect. Therefore, in order to avoid this problem, after completing the cleaning work of each digging tooth 4, the motor 4 26 drives the connecting rod 27 to rotate continuously, and the reciprocating plate 31 can be made to reciprocate in a straight line under the action of the connecting rod 3 28, the sleeve 21, and the sliding rod 22, so that the brush plates 2 32 and 33 are vibrated, thereby shaking off the dirt adhered to the bristle ends of the two, thereby achieving self-cleaning of the dirt adhered to the bristle ends of the brush plates 2 32 and 33, and avoiding the situation where the bristle ends of the brush plates 2 32 and 33 adhere to dirt, thereby affecting the subsequent cleaning effect.

[0050] In this embodiment, Figure 6 and Figure 7 As shown, a synchronous clearing component is also provided on the adjusting rod 5;

[0051] The synchronous cleaning component includes two brush plates 29 slidably connected to one side of the adjustment rod 5 , a spring 30 is fixedly connected between the two brush plates 29 , and the bristle ends of the brush plates 29 are in contact with the inner side of the slide groove 14 .

[0052] Specifically, although the soil on the surface of the tooth digging part 4 can be removed by the above method, the soil will flow out through the chute 14 along with the water flow. When the soil passes through the chute 14, it is easy for the soil to adhere to the inner wall of the chute 14, which not only affects the movement of the adjusting rod 5 but also affects the subsequent water flow through;

[0053] Therefore, to solve the above problems, when this embodiment is in use, since the bristled end of the first brush plate 29 is in contact with the inner wall of the chute 14, when the adjusting rod 5 is driven to slide at the chute 14, the bristled end of the first brush plate 29 will also clean the inner wall of the chute 14, thus realizing the removal of the soil adhering to the inner wall of the chute 14, and avoiding the situation that when the soil passes through the chute 14, due to the soil adhering to the inner wall of the chute 14, it will affect the movement of the adjusting rod 5 and the subsequent water flow through.

[0054] In this embodiment, as Figure 2 and Figure 9 shown, the drill pipe adapter 3 is inserted with a mounting joint 2. Both sides of the upper end of the drill pipe adapter 3 are slidably connected with positioning blocks 11. The positioning blocks 11 are inserted into the positioning holes 10 at the upper end of the mounting joint 2. One end of the positioning block 11 is fixedly connected with a first spring 15, and the other end of the first spring 15 is fixedly connected to the drill pipe adapter 3.

[0055] Specifically, the mounting joint 2 is fixed to the rotary excavator, the drill pipe adapter 3 is inserted into the inner cavity of the mounting joint 2, and the positioning blocks 11 will retract due to the extrusion of the inner wall of the mounting joint 2. When the positioning blocks 11 reach the positioning holes 10, they will reset under the action of the first spring 15, so that the positioning blocks 11 are inserted into the positioning holes 10, thus realizing the quick installation of the drill pipe adapter 3 and the mounting joint 2, which is easy to disassemble and replace.

[0056] Working principle: It is fixed to the rotary drilling rig through the installation joint 2. The drill bit connecting pipe 3 is inserted into the inner cavity of the installation joint 2. The positioning block 11 will retract due to the extrusion of the inner wall of the installation joint 2. When the positioning block 11 reaches the positioning hole 10, it will reset under the action of the first spring 15, so that the positioning block 11 is inserted into the positioning hole 10, thus realizing the quick installation of the drill bit connecting pipe 3 and the installation joint 2, which is easy to disassemble and replace. The outer cylinder 1 is driven to rotate by the rotary drilling rig, and the rotary drilling is carried out by using the digging teeth 4. At the same time, the threaded rod 38 can be driven to rotate by the first motor 6, so as to drive the threaded block 12 to move up and down. When the threaded block 12 moves up and down, it will drive a plurality of first connecting rods 13 to rotate at the same time. When the first connecting rods 13 rotate, their ends will drive the adjusting rod 5 to slide at the sliding groove 14, adjusting the distance between the digging teeth 4 and the axis of the installation disc 8, thus realizing the adjustment of the rotary drilling diameter and meeting different usage requirements. When a rotary drilling operation is completed, the digging teeth 4 are driven to move again to make the digging teeth 4 close to the axis of the installation disc 8. At this time, the installation disc 8 is driven to rotate 180 degrees by the second motor 9, so that the digging teeth 4 can enter the inner cavity of the outer cylinder 1. Then, the upper end of the water inlet pipe 23 is connected to an external water pipe. The rotating plate 18 is driven to rotate by the third motor 17, so that the reciprocating plate 31 is alternately located above each digging tooth 4. Then, the lifting plate 20 is driven to descend by the cylinder 19 until the second brush plate 32 and the third brush plate 33 are attached to the surface of the digging teeth 4. Moreover, the second brush plate 32 and the third brush plate 33 will be closely attached to the surface of the digging teeth 4 under the action of the fourth spring 35 and the third spring 37, and can adapt to the shape change of the digging teeth 4, so that all positions on the surface of the digging teeth 4 are cleaned, and the soil adhered to the surface of the digging teeth 4 falls off. At the same time, the cleaning water is introduced into the water inlet pipe 23 from the external water pipe and sprayed out from the end of the water inlet pipe 23 to wash the surface of the digging teeth 4. Then, the above operations are repeated until all the digging teeth 4 are cleaned, and the cleaning water will be discharged from the sliding groove 14 without accumulating in the inner cavity of the outer cylinder 1, thus realizing the removal of the soil adhered to the surfaces of multiple digging teeth 4, avoiding the situation that the soil easily forms lumps on the surface of the digging teeth 4 due to long-term adhesion of the soil on the surface of the digging teeth 4, resulting in the passivation of the digging teeth 4 and further affecting the cutting effect of the digging teeth 4 on the soil layer during subsequent use. Although the soil on the surface of the digging teeth 4 can be removed in the above way, when the bristled ends of the second brush plate 32 and the third brush plate 33 contact the surface of the digging teeth 4, soil may also adhere, thus affecting the subsequent cleaning effect. Therefore, in order to avoid this problem, after the cleaning work of each digging tooth 4 is completed, the second connecting rod 27 is continuously rotated by the fourth motor 26, and the reciprocating plate 31 can be made to move linearly back and forth under the action of the third connecting rod 28, the sleeve 21 and the sliding rod 22, so that the second brush plate 32 and the third brush plate 33 vibrate, thus shaking off the soil adhered to the bristled ends of the two, and further realizing the self-cleaning of the soil adhered to the bristled ends of the second brush plate 32 and the third brush plate 33, avoiding the situation that the subsequent cleaning effect is affected due to the adhesion of the soil to the bristled ends of the second brush plate 32 and the third brush plate 33.Since the bristled end of the first brush plate 29 is in contact with the inner wall of the chute 14, when the adjusting rod 5 is driven to slide at the chute 14, the bristled end of the first brush plate 29 will also clean the inner wall of the chute 14, thereby realizing the removal of the soil adhering to the inner wall of the chute 14. This avoids the situation where when the soil passes through the chute 14, the movement of the adjusting rod 5 and the subsequent flow of water are affected due to the soil adhering to the inner wall of the chute 14.

[0057] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A rotary drilling and expanding bit, comprising an outer cylinder (1), characterized in that: The upper end of the outer cylinder (1) is fixedly connected with a drill pipe joint (3). A mounting plate (8) is rotatably arranged at the bottom of the inner cavity of the outer cylinder (1). A plurality of chutes (14) are arranged radially on the mounting plate (8). An adjusting rod (5) is slidably connected at the chute (14). One end of the adjusting rod (5) is fixedly connected with a digging tooth (4). A shape-adaptive cleaning mechanism for removing the soil adhered to the surface of the digging tooth (4) is further arranged in the inner cavity of the outer cylinder (1). The shape-adaptive cleaning mechanism includes a fixing plate (16) fixedly connected to the upper side of the inner cavity wall of the outer cylinder (1). A rotating plate (18) is rotatably arranged in the middle of the lower end face of the fixing plate (16). A cylinder (19) is fixedly connected to one side of the lower end face of the rotating plate (18). The piston end of the cylinder (19) is fixedly connected with a lifting plate (20). Sleeves (21) are fixedly connected to both sides of the lower end face of the lifting plate (20). A sliding rod (22) is slidably connected in the sleeve (21). The lower end of the sliding rod (22) is fixedly connected with a reciprocating plate (31). Connecting plates one (24) are fixedly connected to both the left and right sides of the lower end face of the reciprocating plate (31). Sliding columns one (34) are slidably connected to both sides of the lower end of the connecting plate one (24).

2. The auger drill bit for rotary drilling and squeezing and expanding according to claim 1, wherein: A motor two (9) is fixedly connected to one side of the bottom of the outer cylinder (1). The output end of the motor two (9) is fixedly connected to one side of the mounting plate (8). One end of the sliding column one (34) is fixedly connected with a brush plate two (32). Connecting plates two (25) are fixedly connected to both the front and back sides of the lower end face of the reciprocating plate (31). Sliding columns two (36) are slidably connected to both sides of the lower end of the connecting plate two (25). One end of the sliding column two (36) is fixedly connected with a brush plate three (33).

3. The auger drill bit with squeezing and expanding function according to claim 1, wherein: A support plate (7) is fixedly connected to one side of the upper end face of the mounting plate (8). A motor one (6) is fixedly connected to the middle of the upper end face of the support plate (7). The output end of the motor one (6) is fixedly connected with a threaded rod (38). The upper end of the threaded rod (38) is rotatably arranged on the support plate (7), and the lower end is rotatably arranged on the mounting plate (8). The threaded rod (38) is threadedly connected with a threaded block (12). One end of the adjusting rod (5) is rotatably provided with a connecting rod one (13). One end of the connecting rod one (13) is rotatably connected with the threaded block (12).

4. The auger drill bit for rotary drilling and extrusion reaming according to claim 1, wherein: A motor three (17) is fixedly connected to the middle of the upper end face of the fixing plate (16). The output end of the motor three (17) is fixedly connected to one end of the rotating plate (18). A connecting rod two (27) is rotatably arranged on one side of the front end face of the lifting plate (20). One end of the connecting rod two (27) is rotatably provided with a connecting rod three (28). One end of the connecting rod three (28) is rotatably connected with one side of the reciprocating plate (31).

5. The auger drill bit with rotary digging and extrusion expansion according to claim 4, characterized in that: A motor four (26) is fixedly connected to one side of the lower end of the lifting plate (20). The output end of the motor four (26) is fixedly connected to one end of the connecting rod two (27).

6. The rotational drilling and squeezing reamer bit according to claim 1, characterized in that: A spring four (35) is sleeved on one end of the sliding column one (34). One end of the spring four (35) is fixedly connected with the brush plate two (32), and the other end is fixedly connected with the connecting plate one (24).

7. The auger-rotating and squeezing-expanding drill bit according to claim 2, wherein: One end of the second sliding column (36) is sleeved with a third spring (37). One end of the third spring (37) is fixedly connected to the second connecting plate (25), and the other end is fixedly connected to the end of the second sliding column (36).

8. The auger drill bit with extrusion and expansion according to claim 1, characterized in that: A water inlet pipe (23) is arranged through the first connecting plate (24) on one side. One end of the water inlet pipe (23) penetrates and is fixedly connected to one side of the outer cylinder (1). The part of the water inlet pipe (23) penetrating the outer cylinder (1) is made of a rigid material, and the rest is made of an elastic material.

9. The auger drill bit for rotational drilling and squeezing and expanding according to claim 1, wherein: A synchronous cleaning component is further arranged on the adjusting rod (5); The synchronous cleaning component includes two first brush plates (29) slidably connected to one side of the adjusting rod (5). A second spring (30) is fixedly connected between the two first brush plates (29). The bristled ends of the first brush plates (29) are attached to the inner side of the sliding groove (14).

10. The auger drill bit with squeezing and expanding function according to claim 1, wherein: The drill pipe joint (3) is inserted with a mounting joint (2). Positioning blocks (11) are slidably connected to both sides of the upper end of the drill pipe joint (3). The positioning blocks (11) are inserted into the positioning holes (10) at the upper end of the mounting joint (2). One end of the positioning block (11) is fixedly connected to a first spring (15), and the other end of the first spring (15) is fixedly connected to the drill pipe joint (3).

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