Stirring pile drill bit suitable for aeolian sand geology

Abstract

The invention provides a stirring pile drill bit suitable for the aeolian sand geology, and relates to the technical field of stirring pile drill bits, the stirring pile drill bit suitable for the aeolian sand geology comprises a drill bit main body, and further comprises a material distributing mechanism, a stirring mechanism and a stirring rod which are installed on the drill bit main body; the material distributing mechanism comprises a first shell installed on the drill bit body, and a feeding pipe is installed on the top of the first shell; the distributing mechanism is arranged, the multiple discharging holes are formed in the distributing pipe of the distributing mechanism, the distributing mechanism can be driven under the action of centrifugal force of a drill bit to evenly guide a curing agent into sandy soil through the multiple discharging holes, the stirring rod is arranged at the bottom of the distributing mechanism, and the stirring mechanism is arranged at the top of the distributing mechanism; and a curing agent and sandy soil mixture can be stirred multiple times at different angles, the curing agent and sandy soil mixture can be mixed evenly, and then the quality of the stirring pile is improved.

Description

Technical Field

[0001] The invention relates to the technical field of mixing pile drill bits, in particular to a mixing pile drill bit suitable for aeolian sand geology. Background Art

[0002] Mixing piles are a device used to reinforce the foundation. Through special mixing machinery, soft soil and curing agent are forced to mix deep in the foundation. A series of physical and chemical reactions between the curing agent and the soft soil are used to harden the soft soil into a high-quality foundation with integrity, water stability and a certain strength.

[0003] Aeolian sand refers to a sandy soil layer formed by wind, which is common in arid and semi-arid areas such as deserts and Gobi. Under this geological condition, the soil particles are mainly composed of fine sand, with a loose structure and lack of viscosity, which poses a severe challenge to foundation treatment and engineering construction.

[0004] Traditional mixing pile drill bits are often designed for soils with a certain viscosity and strength, and improve the bearing capacity and stability of the foundation by mixing with a solidifying agent. However, in aeolian sand geology, due to the looseness of sand particles, the mixing ability of traditional mixing pile drill bits is not good enough, which may cause the sand and solidifying agent to be unable to mix evenly, resulting in unstable construction quality and even failure to achieve the expected foundation reinforcement effect. In view of the characteristics of aeolian sand geology, it is particularly important to develop a new type of mixing pile drill bit. Summary of the invention

[0005] The purpose of the present invention is to provide a mixing pile drill bit suitable for aeolian sand geology, aiming to solve the problem in general technology that the mixing effect of the mixing pile drill bit suitable for aeolian sand geology is not good enough, resulting in unstable construction quality.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: the mixing pile drill bit suitable for aeolian sand geology includes a drill bit body, and also includes a feeding mechanism, a stirring mechanism and a stirring rod installed on the drill bit body; the feeding mechanism includes a first shell installed on the drill bit body, and a plurality of feeding tubes distributed in a circumference are fixedly installed on the outside of the first shell, and a plurality of discharge holes are opened on the outer surface of the feeding tube. The curing agent entering the first shell enters the feeding tube under the action of the centrifugal force of the first shell, and is finally uniformly discharged through the plurality of discharge holes on the feeding tube. When the drill bit body rises, the stirring rod preliminarily stirs the mixture of the curing agent and the sand; the stirring mechanism includes a plurality of connecting rods distributed along the circumference of the drill bit body, and a plurality of groups of stirring blades are fixedly installed on the outer surface of each of the connecting rods. The drill bit body drives the plurality of connecting rods at the same time through a transmission mechanism, and the rotation direction of the connecting rod is perpendicular to the rotation direction of the drill bit body. When the drill bit body sinks for the second time, the feeding mechanism, the stirring mechanism and the stirring rod all stir the mixture of the curing agent and the sand.

[0007] A further technical solution of the present invention is that the drill bit body includes a rotating rod and a drilling part, the bottom end of the rotating rod is fixedly connected to the drilling part, the top end of the rotating rod is connected to the driving mechanism, the feeding mechanism, the stirring mechanism and the stirring rod are all fixedly installed on the rotating rod, and a crushing block is fixedly installed at the end of the bottom of each stirring rod.

[0008] A further technical solution of the present invention is that a plurality of mounting seats are fixedly mounted on the outer surface of the rotating rod, and a sliding groove is provided on the top and the bottom of each mounting seat.

[0009] A further technical solution of the present invention is that a push plate is slidably installed inside each of the mounting seats, and the push plate is located inside the fabric pipe.

[0010] A further technical solution of the present invention is that both upper and lower sides of the push plate are fixedly installed with limit blocks for limiting the push plate, and the limit blocks are slidably installed inside the slide groove, and the limit blocks can slide from one end of the slide groove to the other end.

[0011] A further technical solution of the present invention is that a plurality of connection blocks corresponding to the positions of the discharge holes are fixedly installed on one side of the push plate, and when the drill body sinks, the connection blocks are located inside the discharge holes and seal them.

[0012] A further technical solution of the present invention is that the stirring mechanism further comprises a second shell fixedly mounted on the rotating rod, the outer surface of the second shell has a plurality of expansion parts, and the connecting rod is rotatably mounted on the end of the expansion part.

[0013] A further technical solution of the present invention is that a plurality of reinforcement seats for reinforcing the connecting rods are fixedly installed inside the second shell, and the connecting rods are rotatably connected to the reinforcement seats.

[0014] A further technical solution of the present invention is that the transmission mechanism includes a bevel gear fixedly mounted on the end of the connecting rod, and a bevel gear ring fixedly mounted on the outer surface of the rotating rod, and the bevel gear ring and the bevel gear are meshed with each other.

[0015] A further technical solution of the present invention is that the rotation direction of the stirring blade is perpendicular to the rotation direction of the material distribution mechanism and the stirring rod.

[0016] The present invention has at least the following technical effects: 1. The present invention provides a distribution mechanism and opens a plurality of discharge holes on a distribution pipe of the distribution mechanism. Under the action of the centrifugal force of the drill bit, the distribution mechanism can be driven to evenly discharge the curing agent into the interior of the sand through the plurality of discharge holes. A stirring rod is provided at the bottom of the distribution mechanism, and a stirring mechanism is provided at the top of the distribution mechanism. The curing agent and the sand mixture can be stirred multiple times and at different angles, so that the curing agent and the sand mixture can be mixed sufficiently evenly, thereby improving the quality of the mixing pile.

[0017] 2. The present invention arranges a mounting seat on the drill body to install the push plate, and arranges a connecting block on one side of the push plate, which can not only block the discharge hole during the sinking process of the drill body, but also allow the user to pump curing agent into the first shell in advance to ensure that the curing agent can be supplied in time when the drill body rises, and can also dredge the discharge hole when it is blocked, thereby achieving the purpose of improving work efficiency and facilitating dredging. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of embodiment 1 of the present invention.

[0019] Figure 2 It is a schematic diagram of the internal structure of the present invention.

[0020] Figure 3 It is a structural schematic diagram of the rising state of the second embodiment of the present invention.

[0021] Figure 4 It is a structural schematic diagram of the sinking state of the second embodiment of the present invention.

[0022] Figure 5 It is a structural schematic diagram of a drill bit body in a specific embodiment of the present invention.

[0023] Figure 6 It is a schematic structural diagram of a mounting base in a specific embodiment of the present invention.

[0024] Figure 7It is a structural schematic diagram of a cloth dispensing mechanism in a specific embodiment of the present invention.

[0025] Figure 8 It is a structural schematic diagram of the second shell in a specific embodiment of the present invention.

[0026] Fig. 9 It is a schematic diagram of the structure of a stirring rod in a specific embodiment of the present invention.

[0027] Fig.10 It is a structural schematic diagram of a push plate in a specific embodiment of the present invention.

[0028] In the figure: 1. drill bit body; 11. rotating rod; 12. drilling part; 13. stirring rod; 131. crushing block; 14. mounting groove; 15. mounting seat; 151. slide groove; 2. feeding mechanism; 21. first shell; 24. feeding pipe; 241. discharge hole; 3. stirring mechanism; 31. second shell; 32. expansion part; 33. connecting rod; 34. stirring blade; 35. reinforcement seat; 36. bevel gear; 37. bevel gear ring; 4. push plate; 41. limit block; 42. connecting block. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Embodiment 1

[0031] In aeolian sand geology, due to the looseness and non-hydrophilicity of sand particles, it is difficult for traditional mixing pile drills to form an effective mixture of sand and soil during the drilling and mixing process, resulting in unstable construction quality and even failure to achieve the expected foundation reinforcement effect.

[0032] Based on the above problems, this embodiment Figure 1-Figure 2As shown, a mixing pile drill bit suitable for aeolian sand geology is provided, comprising a drill bit body 1, a feeding mechanism 2 and a stirring rod 13 are rotatably installed at the lower middle part of the drill bit body 1, the number of the stirring rods 13 is multiple, and the multiple stirring rods 13 are located at the bottom of the feeding mechanism 2, and a stirring mechanism 3 is fixedly installed at the upper middle part of the drill bit body 1, and the feeding mechanism 2 is used to introduce a curing agent into the sand. After the drill bit body 1 is deep-dug and descends to the designed depth, the drill bit body 1 is reversed to lift it upward. In the process of the drill bit body 1 being reversed and lifted upward, the feeding mechanism 2 evenly guides the curing agent into the sand and mixes it with the sand. At the same time, the stirring rod 13 at the bottom of the feeding mechanism 2 The mixture of the curing agent and the sand is initially stirred. After the drill body 1 is lifted upward to the specified position, the drill body 1 is repeatedly rotated and sunk. During the secondary sinking of the drill body 1, the feeding mechanism 2 and the stirring rod 13 stir the mixture of the curing agent and the sand for the second time. Then the stirring mechanism 3 stirs the mixture of the curing agent and the sand stirred by the feeding mechanism 2 again. After the drill body 1 sinks to the designed depth, it is lifted again and lifted above the pile top. During the secondary lifting of the drill body 1, the feeding mechanism 2 continues to export the curing agent to fill the pile body. By stirring the curing agent and sand mixture multiple times, it can be mixed more evenly to ensure the construction quality.

[0033] like Figure 6 As shown, the drill body 1 includes a rotating rod 11 and a drilling portion 12, the bottom end of the rotating rod 11 is fixedly connected to the drilling portion 12, the top end of the rotating rod 11 is connected to the driving mechanism, the feeding mechanism 2, the stirring mechanism 3 and the stirring rod 13 are all installed on the rotating rod 11, and a breaking block 131 is fixedly installed at the end of the bottom of each stirring rod 13. The driving mechanism drives the rotating rod 11 so that the rotating rod 11 drives the drilling portion 12 to rotate and drill. The driving mechanism can also drive the feeding mechanism 2, the stirring mechanism 3 and the stirring rod 13 through the rotating rod 11. The breaking block 131 expands the drilling hole of the drilling portion 12 as the stirring rod 13 rotates, so as to facilitate the descent of the feeding mechanism 2 and the stirring mechanism 3.

[0034] like Figure 1 , Figure 2 and Figure 7As shown, the material distributing mechanism 2 includes a first shell 21, which is fixedly mounted on the rotating rod 11 and rotates with the rotation of the rotating rod 11. The first shell 21 is a cylindrical shape with an upper end open. A cover plate for sealing the first shell 21 is rotatably mounted on the top of the first shell 21. The cover plate is rotatably mounted on the rotating rod 11. A feeding pipe for adding a curing agent to the first shell 21 is mounted on the cover plate. The rotatably connected cover plate and feeding pipe belong to the prior art, so this embodiment is not shown in the figure; a plurality of material distributing pipes 24 are fixedly mounted on the outer surface of the first shell 21. The plurality of material distributing pipes 24 are distributed in a circle, and one side of the outer surface of each material distributing pipe 24 is open. A plurality of discharge holes 241 are provided. The rotating rod 11 drives the first shell 21 and the distribution pipe 24 on its outer surface to rotate under the drive of the driving mechanism. After the drill body 1 sinks to the designed depth, it is reversely driven by the driving mechanism to lift it. At this time, the feed pump pumps the curing agent into the first shell 21 through the feeding pipe. The curing agent entering the first shell 21 enters the distribution pipe 24 under the action of centrifugal force and is evenly discharged into the sand through the discharge holes 241 on the outer surface of the distribution pipe 24. At the same time, the rotating stirring rod 13 can initially stir the discharged curing agent and the sand to form a mixture of the curing agent and the sand.

[0035] like Figure 1 , Figure 2 , Figure 8 and Fig. 9 As shown, the stirring mechanism 3 includes a second shell 31 fixedly mounted on the rotating rod 11, the second shell 31 is a hollow cylindrical shape, the outer surface of the second shell 31 has a plurality of expansion parts 32, the end of each expansion part 32 is rotatably mounted with a connecting rod 33, the outer surface of each connecting rod 33 is fixedly mounted with a plurality of groups of stirring blades 34, the number of each group of stirring blades 34 is at least two, the interior of the second shell 31 is fixedly mounted with a plurality of reinforcement seats 35 for reinforcing the connecting rod 33, the connecting rod 33 is rotatably mounted inside the reinforcement seat 35, and the rotating rod 11 converts the horizontal rotation force into vertical rotation force under the action of the transmission mechanism. The force in the straight direction drives the connecting rod 33 to rotate. The transmission mechanism includes a bevel gear 36 fixedly mounted on the end of the connecting rod 33 and a bevel gear ring 37 fixedly mounted on the outer surface of the rotating rod 11. The rotating rod 11 drives the connecting rod 33 to rotate through the transmission mechanism, so that the mixture of the curing agent and the sand after the initial stirring is stirred again by multiple groups of stirring blades 34 on the outer surface of the connecting rod 33. Since the rotation direction of the stirring blades 34 is perpendicular to the rotation direction of the feeding pipe 24, the mixture of the curing agent and the sand can be stirred multiple times at different angles so that it can be mixed more evenly, thereby ensuring the stability of the construction quality.

[0036] When in use, first move the pile mixing machine to the designated pile position, adjust the pile mixing machine, and then start the pile mixing machine to gradually sink it. After the drill bit body 1 of the pile mixing machine sinks to the designed depth, the drill bit body 1 is rotated in the opposite direction to lift it. At this time, the delivery pump pumps the curing agent into the first shell 21 of the material distribution mechanism 2. The curing agent entering the first shell 21 enters the material distribution pipe 24 under the action of centrifugal force and is evenly discharged into the sand through the discharge hole 241. After the drill bit body 1 rises to the preset position, the delivery pump is turned off and the drill bit body 1 is sunk for the second time. During the secondary sinking process of the drill bit body 1, after the drill bit body 1 is lowered to the set depth for the second time, it is reversed and lifted again and lifted to above the pile top. During the secondary lifting process of the drill bit body 1, the delivery pump is also turned on to output the curing agent through the material distribution mechanism 2 to fill the inside of the pile body. In the process of the secondary descent and lifting of the drill bit body 1, the material distribution mechanism 2, the stirring rod 13 and the stirring mechanism 3 can all stir the curing agent and the sand mixture.

[0037] In this embodiment, by providing a distribution mechanism 2 and opening a plurality of discharge holes 241 on the distribution tube 24 of the distribution mechanism 2, the distribution mechanism 2 can be driven by the centrifugal force of the drill bit to evenly discharge the curing agent into the interior of the sand through the plurality of discharge holes 241. A stirring rod 13 is provided at the bottom of the distribution mechanism 2, and a stirring mechanism 3 is provided at the top of the distribution mechanism 2, which can facilitate the user to stir the curing agent and sand mixture multiple times and at different angles, so that the curing agent and sand mixture can be mixed sufficiently evenly, thereby improving the quality of the mixing pile.

[0038] Embodiment 2

[0039] During actual use, it was found that during the initial period of pumping the curing agent into the first shell 21, the curing agent may not be supplied in time, and the discharge hole 241 on the outer surface of the distribution tube 24 may be blocked during use. Since the distribution mechanism 2 is located in the sand along with the drill body 1, it is not convenient for the user to perform timely maintenance on it. If maintenance is required, the drill bit can only be taken out as a whole, which will seriously affect the construction progress and construction quality. Therefore, further improvements will be made on the basis of the above embodiments.

[0040] like Figure 3-Figure 6 As shown, the difference between this embodiment and the first embodiment is that the first shell 21 is rotatably mounted on the rotating rod 11, and a plurality of mounting grooves 14 are provided on the outer surface of the rotating rod 11. A plurality of mounting seats 15 corresponding to the positions of the mounting grooves 14 are also fixedly mounted on the outer surface of the rotating rod 11, and a sliding groove 151 is provided on the top and bottom of the mounting seat 15.

[0041] like Figure 3-Figure 6 and Fig.10As shown, a push plate 4 is slidably installed inside the mounting groove 14 and the mounting seat 15 opposite thereto, and the push plate 4 is located inside the fabric tube 24. Limit blocks 41 for limiting the push plate 4 are fixedly installed on the upper and lower sides. The limit blocks 41 are slidably installed inside the slide groove 151 to limit the push plate 4, thereby preventing the push plate 4 from falling off from the mounting groove 14 and the mounting seat 15 during use. The limit blocks 41 can slide from one end of the slide groove 151 to the other end, and a plurality of connecting blocks 42 are fixedly installed on one side of the push plate 4. The connecting blocks 42 correspond to the discharge holes 241 one by one, and the outer diameter of the connecting blocks 42 is slightly smaller than the inner diameter of the discharge holes 241.

[0042] During use, when the drill body 1 rotates and sinks in the forward direction driven by the driving mechanism, the rotating rod 11 drives the mounting seat 15 installed thereon to rotate, and the mounting seat 15 drives the push plate 4 installed inside it to move to one side thereof, that is, the limit block 41 slides to one end of the slide groove 151. At this time, the push plate 4 is pressed against the inner wall of one side of the distribution tube 24, and the connecting block 42 on one side of the push plate 4 is located inside the discharge hole 241 of the distribution tube 24 and blocks it, which can avoid the entry of sand and soil and the blockage caused by curing agent, etc. At this time, the distribution tube 24 is used for stirring.

[0043] When the drill body 1 reaches the designed depth, when the driving mechanism drives upward in the reverse direction, the rotating rod 11 drives the mounting seat 15 to rotate in the reverse direction, so that the push plate 4 moves from one side of the material distribution tube 24 to the other side, and the connecting block 42 moves away from the discharge hole 241 and releases the blockage of the discharge hole 241. The curing agent can be discharged from the discharge hole 241 under the action of centrifugal force, and the connecting block 42 can clear the discharge hole 241 when the drill body 1 rotates forward and sinks to avoid blockage.

[0044] In this embodiment, a mounting groove 14 is opened on the drill body 1, and a mounting seat 15 corresponding to the mounting groove 14 is provided to install the push plate 4. A connecting block 42 is provided on one side of the push plate 4. Not only can the discharge hole 241 be blocked during the sinking process of the drill body 1, the user can pump the curing agent into the first shell 21 in advance to ensure that the curing agent can be supplied in time when the drill body 1 rises, and the discharge hole 241 can also be unblocked when it is blocked, thereby achieving the purpose of improving work efficiency and facilitating unblocking.

[0045] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A mixing pile drill bit suitable for aeolian sand geology, comprising a drill bit body (1), characterized in that: It also includes a material distribution mechanism (2), a stirring mechanism (3) and a stirring rod (13) installed on the drill head body (1); The material distribution mechanism (2) comprises a first shell (21) mounted on the drill bit body (1); a plurality of material distribution tubes (24) distributed in a circumferential manner are fixedly mounted on the outside of the first shell (21); a plurality of material discharge holes (241) are provided on the outer surface of the material distribution tube (24); the curing agent entering the first shell (21) enters the material distribution tube (24) under the action of the centrifugal force of the first shell (21) and is finally uniformly discharged through the plurality of material discharge holes (241) on the material distribution tube (24); and when the drill bit body (1) rises, the stirring rod (13) preliminarily stirs the mixture of the curing agent and sand; The stirring mechanism (3) comprises a plurality of connecting rods (33) distributed along the circumference of the drill bit body (1), and a plurality of groups of stirring blades (34) are fixedly mounted on the outer surface of each of the connecting rods (33). The drill bit body (1) drives the plurality of connecting rods (33) simultaneously through a transmission mechanism, and the rotation direction of the connecting rods (33) is perpendicular to the rotation direction of the drill bit body (1). When the drill bit body (1) sinks for the second time, the material distribution mechanism (2), the stirring mechanism (3) and the stirring rod (13) all stir the mixture of the curing agent and the sand.

2. The mixing pile drill bit suitable for aeolian sand geology according to claim 1, characterized in that: The drill head body (1) comprises a rotating rod (11) and a drilling portion (12); the bottom end of the rotating rod (11) is fixedly connected to the drilling portion (12); the top end of the rotating rod (11) is connected to a driving mechanism; the material distribution mechanism (2), the stirring mechanism (3) and the stirring rod (13) are all fixedly mounted on the rotating rod (11); and a crushing block (131) is fixedly mounted at the end of the bottom of each stirring rod (13).

3. The mixing pile drill bit suitable for aeolian sand geology according to claim 2, characterized in that: A plurality of mounting seats (15) are also fixedly mounted on the outer surface of the rotating rod (11), and a sliding groove (151) is provided at the top and the bottom of each mounting seat (15).

4. The mixing pile drill bit suitable for aeolian sand geology according to claim 3, characterized in that: A push plate (4) is slidably mounted inside each mounting seat (15), and the push plate (4) is located inside the material distribution tube (24).

5. The mixing pile drill bit suitable for aeolian sand geology according to claim 4, characterized in that: Limit blocks (41) for limiting the push plate (4) are fixedly mounted on both upper and lower sides thereof. The limit blocks (41) are slidably mounted inside the slide groove (151). The limit blocks (41) can slide from one end of the slide groove (151) to the other end.

6. The mixing pile drill bit suitable for aeolian sand geology according to claim 4, characterized in that: A plurality of connection blocks (42) corresponding one to one with the positions of the discharge holes (241) are fixedly mounted on one side of the push plate (4); when the drill body (1) sinks, the connection blocks (42) are located inside the discharge holes (241) and block them.

7. The mixing pile drill bit suitable for aeolian sand geology according to claim 1, characterized in that: The stirring mechanism (3) further comprises a second shell (31) fixedly mounted on the rotating rod (11); the outer surface of the second shell (31) comprises a plurality of expansion portions (32); and the connecting rod (33) is rotatably mounted on the end of the expansion portion (32).

8. The mixing pile drill bit suitable for aeolian sand geology according to claim 7, characterized in that: A plurality of reinforcement seats (35) for reinforcing the connecting rod (33) are fixedly mounted inside the second shell (31), and the connecting rod (33) is rotatably connected to the reinforcement seat (35).

9. The mixing pile drill bit suitable for aeolian sand geology according to claim 7, characterized in that: The transmission mechanism comprises a bevel gear (36) fixedly mounted on the end of the connecting rod (33), and a bevel gear ring (37) fixedly mounted on the outer surface of the rotating rod (11), wherein the bevel gear ring (37) and the bevel gear (36) are meshed with each other.

10. The mixing pile drill bit suitable for aeolian sand geology according to claim 1, characterized in that: The rotation direction of the stirring blade (34) is perpendicular to the rotation direction of the material distribution mechanism (2) and the stirring rod (13).

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