Omnidirectional deep soil reinforcement forced stirring drilling tool

Abstract

The invention provides an omni-directional deep soil reinforcement forced stirring drilling tool which comprises a single-shaft drilling tool and a multi-shaft rotating tool, and the multi-shaft drilling tool is formed by combining a plurality of single-shaft drilling tools; the single-shaft drilling tool comprises a drilling rod and a drilling bit; the drill rod comprises an inner drill rod and an outer drill rod, the outer drill rod is arranged on the outer side of the inner drill rod in a sleeving mode, the inner drill rod and the outer drill rod are coaxially arranged, and the inner drill rod and the outer drill rod are opposite in rotating direction or identical in rotating direction and different in rotating speed; the drill bit comprises a shell and a center rotating rod, the shell and the center rotating rod are rotatably connected, the shell and the outer drill rod are detachably connected and coaxially arranged, the center rotating rod and the inner drill rod are detachably connected and coaxially arranged, a first stirring assembly is installed on the center rotating rod, and a second stirring assembly is installed on the shell. The first stirring assembly and the second stirring assembly are parallel to the center rotating rod, the transverse stirrer is installed at the front end of the center rotating rod, and the stirring effect is good due to the fact that the first stirring assembly and the second stirring assembly can form longitudinal mutual shearing.

Description

Technical Field

[0001] The invention relates to the field of building construction equipment, in particular to an omnidirectional deep soil reinforcement forced mixing drill. Background Art

[0002] When the foundation is non-load-bearing, pre-reinforcement is required. However, if surrounding buildings and underground projects are present, foundation reinforcement becomes more difficult. Therefore, to prevent subsidence and collapse during the construction of underground projects, such as subways and utility corridors, which could damage underground facilities and pipelines, potentially leading to economic losses and casualties, it is essential to implement reinforcement measures on soft soil foundations.

[0003] At present, deep mixing reinforcement construction is often used to reinforce soft soil foundations in my country. Deep mixing reinforcement is to reinforce the soft soil by rotating the blades of the mixer to mix the curing agent such as lime or cement with the soft soil. In order to achieve multi-directional three-dimensional mixing. For example, the patent application with the announcement number CN 118187032 A discloses an omnidirectional mixing drill and a construction method, wherein the second mixing device includes a second rotating rod and at least one second mixing blade; the second rotating rod is perpendicular to the first rotating rod, the second rotating rod is rotatably connected to the shell, one end of the second rotating rod passes through the shell, and the second mixing blade is fixed to the second rotating rod passing through the shell portion; the other end of the second rotating rod is equipped with a first bevel gear, the first rotating rod is equipped with a second bevel gear, and the first bevel gear is meshed with the second bevel gear.

[0004] The aforementioned drilling tool has a complex structure, with high precision requirements for the bevel gear and tight sealing requirements for the housing, resulting in high production costs and a high risk of failure during use. Furthermore, the housing is large, and in actual use, when the soil viscosity is high, the mixture of soil and cement slurry easily adheres to the housing. In severe cases, it can even clog the second stirring device, significantly reducing the longitudinal stirring effect. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides an omnidirectional deep soil reinforcement forced mixing drill, which has the characteristics of simple structure, easy installation, low production cost and good mixing effect.

[0006] The specific technical solution is as follows: an omnidirectional deep soil reinforcement forced mixing drill tool, comprising a single-axis drill tool and a multi-axis rotary tool, wherein the multi-axis drill tool is composed of a plurality of single-axis drill tools;

[0007] The uniaxial drilling tool includes a drill rod and a drill bit;

[0008] The drill rod comprises an inner drill rod and an outer drill rod, wherein the outer drill rod is sleeved on the outer side of the inner drill rod, the inner drill rod and the outer drill rod are coaxially arranged, and the inner drill rod and the outer drill rod have different rotation speeds;

[0009] The drill bit includes an outer shell and a center rotating rod, the outer shell and the center rotating rod are rotatably connected, the outer shell is detachably connected to the outer drill rod and is coaxially arranged, the center rotating rod is detachably connected to the inner drill rod and is coaxially arranged, a first stirring assembly is installed on the center rotating rod, and a second stirring assembly is installed on the outer shell, the first stirring assembly and the second stirring assembly are respectively parallel to the center rotating rod, and a horizontal stirrer is installed at the front end of the center rotating rod.

[0010] Preferably, the first stirring component includes one or more first stirring blades. When there are multiple first stirring blades, they are evenly arranged in a ring shape with the central rotating rod as the center. The second stirring component includes one or more second stirring blades. When there are multiple second stirring blades, they are evenly arranged in a ring shape with the central rotating rod as the center.

[0011] Preferably, both ends of the first stirring blade are fixed to the central rotating rod through a first connecting piece, one end of the second stirring blade is fixed to the outer shell through a second connecting piece, and the other end is fixed to the ring through a second connecting piece, and the ring is sleeved on the central rotating rod.

[0012] Preferably, the lower end or upper end of the first stirring blade is fixed to the central rotating rod through a first connecting piece, and the second stirring blade is divided into two groups, and the two groups of second stirring blades and the first stirring blades are arranged alternately in the radial direction. One end of the outer second stirring blade is fixed to the outer shell through a second connecting piece, and the other end is fixed to the ring through a second connecting piece. The ring is sleeved on the central rotating rod, and the upper end or lower end of the inner second stirring blade is fixed to the second connecting piece.

[0013] Preferably, the first stirring blades are multiple groups, and the lower end of each group of first stirring blades is fixed to the central rotating rod through a first connecting piece. The second stirring blades are multiple groups, and the upper end of each group of second stirring blades is fixed to the outer shell through a second connecting piece. The first stirring blades and the second stirring blades are arranged alternately in the radial direction.

[0014] Preferably, the transverse agitator includes a rotating shaft and a third stirring blade, the rotating shaft is detachably connected to the central rotating rod and is coaxially arranged, and the third stirring blade is installed on the rotating shaft and is perpendicular to the rotating shaft.

[0015] Preferably, the end of the rotating shaft is sleeved on the end of the central rotating rod and connected by a pin or a bolt.

[0016] Preferably, a fourth stirring blade is installed on the outer shell, and the fourth stirring blade is perpendicular to the outer drill rod.

[0017] Preferably, the third connecting piece is sleeved on the end of the outer drill rod and connected via a pin or a bolt.

[0018] Preferably, mud holes are respectively provided on the inner drill rod, the central rotating rod and the rotating shaft and are connected to each other, and a mud outlet is provided on the rotating shaft of the third stirring blade.

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

[0020] 1. The inner drill rod and the outer drill rod rotate in opposite directions or in the same direction but at different speeds, so that the first stirring assembly and the second stirring assembly can form longitudinal mutual shearing, which can effectively prevent the mixture of soil and cement slurry from adhering to the drill bit when the soil viscosity is high. Even if there is a small amount of adhesion, it will automatically fall off during the mutual shearing process, thereby making the stirring effect better than the existing technology.

[0021] 2. The first and second stirring components are parallel to the central rotating rod, and the third and fourth stirring blades are perpendicular to the central rotating rod. The horizontal stirring is combined with the vertical stirring to achieve omnidirectional stirring, which greatly improves the stirring effect and the pile quality.

[0022] 3. The present invention has a simple structure, is easy to install and has low production cost.

[0023] 4. A detachable connection is used between the drill bit and the rotating rod, which makes it easy to install and remove the drill bit.

[0024] 5. The shaft of the horizontal agitator is detachably connected to the central rotating rod, making it easier to disassemble the drill bit in case of failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort. Among them:

[0026] Figure 1 This is a schematic structural diagram of Example 1;

[0027] Figure 2 for Figure 1 AA section view;

[0028] Figure 3 This is an explosion diagram of Example 1;

[0029] Figure 4 Schematic diagram of the dual-axis drilling tool structure in Example 1;

[0030] Figure 5 Schematic diagram of the triaxial drilling tool structure in Example 1;

[0031] Figure 6 This is a schematic structural diagram of Example 2;

[0032] Figure 7 for Figure 6 BB cross-sectional view;

[0033] Figure 8 This is a schematic structural diagram of Example 3;

[0034] Figure 9 for Figure 8 CC cross-sectional view;

[0035] Inner drill rod 1, outer drill rod 2, outer shell 3, second stirring blade 31, second connecting piece 32, collar 33, central rotating rod 4, first stirring blade 41, first connecting piece 42, rotating shaft 5, third stirring blade 6, fourth stirring blade 7. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0037] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive of other embodiments.

[0038] Example 1

[0039] like Figure 1-3As shown, an omnidirectional deep soil reinforcement forced mixing drill tool is a uniaxial drill tool, including a drill rod and a drill bit, the drill rod including an inner drill rod 1 and an outer drill rod 2, the outer drill rod 2 is sleeved on the outside of the inner drill rod 1, the inner drill rod and the outer drill rod are coaxially arranged, and the rotation speeds of the inner drill rod 1 and the outer drill rod 2 are different; the drill bit includes an outer shell 3 and a central rotating rod 4, the outer shell 3 is sleeved outside the central rotating rod 4, the central rotating rod 4 can rotate in the outer shell 3, the outer shell 3 and the outer drill rod 2 are coaxially arranged, the outer shell 3 and the outer drill rod 2 are connected by a flange, a longitudinal pin shaft can be provided to share the torque borne by the bolts of the flange during rotation, the central rotating rod 4 is sleeved with the inner drill rod 1 through a hexagonal joint, and a first stirring assembly is installed on the central rotating rod 4, the first stirring assembly includes three first stirring blades 41, the three first stirring blades 41 are evenly arranged in a ring with the central rotating rod 4 as the center, and the three first stirring blades 41 are at the same distance from the central rotating rod 4. A second stirring assembly is mounted on the housing 3 and includes three second stirring blades 31. The three second stirring blades 31 are evenly arranged in a ring around the central rotating rod 4 and are equidistant from the central rotating rod 4. The first stirring blade 41 and the second stirring blade 31 are parallel to the central rotating rod 4, and a transverse agitator is mounted at the front end of the central rotating rod 4.

[0040] Specifically, the lower end of the first stirring blade 41 is fixed to the central rotating rod through the first connecting piece 42, and the second stirring blade 31 is divided into two groups. The two groups of second stirring blades 31 and the first stirring blade 41 are arranged alternately in the radial direction. One end of the outer second stirring blade 31 is fixed to the outer shell 3 through the second connecting piece 32, and the other end is fixed to the ring 33 through the second connecting piece 32. The ring 33 is sleeved on the central rotating rod 4, and the upper end of the inner second stirring blade 31 is fixed to the second connecting piece 32.

[0041] The horizontal agitator includes a rotating shaft 5 and a third stirring blade 6. The rotating shaft 5 and the central rotating rod 4 are connected coaxially via a hexagonal joint and a pin. The hexagonal joint allows for circumferential positioning. The pin passes through the rotating shaft 5 and the central rotating rod 4 to achieve circumferential and axial positioning. The third stirring blade 6 is mounted on the rotating shaft 5 and is perpendicular to the rotating shaft 5. A fourth stirring blade 7 is mounted on the outer shell 3 and is perpendicular to the outer drill rod 2. Mud holes are respectively opened and connected in the inner drill rod 1, the central rotating rod 4, and the rotating shaft 5, and the rotating shaft 5 is provided with a mud outlet.

[0042] like Figure 4 As shown, an omnidirectional deep soil reinforcement forced mixing drill tool is a double-axis drill tool, which is composed of the above two single-axis drill tools.

[0043] like Figure 5 As shown, an omnidirectional deep soil reinforcement forced mixing drill tool is a three-axis drill tool, which is composed of the three single-axis drill tools mentioned above.

[0044] Example 2

[0045] like Figure 6-7 As shown, an omnidirectional deep soil reinforcement forced mixing drill tool is a uniaxial drill tool, including a drill rod and a drill bit, the drill rod including an inner drill rod 1 and an outer drill rod 2, the outer drill rod 2 is sleeved on the outside of the inner drill rod 1, the inner drill rod 1 and the outer drill rod 2 are coaxially arranged, and the rotation speeds of the inner drill rod 1 and the outer drill rod 2 are different; the drill bit includes an outer shell 3 and a central rotating rod 4, the outer shell 3 is sleeved outside the central rotating rod 4, the central rotating rod 4 can rotate in the outer shell 3, the outer shell 3 and the outer drill rod 2 are coaxially arranged, the outer shell 3 and the outer drill rod 2 are connected by a flange, a longitudinal pin can be provided to share the torque borne by the bolts of the flange during rotation, the central rotating rod 4 and the inner drill rod 1 are sleeved by a hexagonal joint, a first stirring assembly is installed on the central rotating rod 4, the first stirring assembly includes three first stirring blades 41, the three first stirring blades 41 are evenly arranged in a ring with the central rotating rod 4 as the center, and the three first stirring blades 41 are at the same distance from the central rotating rod 4. A second stirring assembly is mounted on the housing 3 and includes three second stirring blades 31. The three second stirring blades 31 are evenly arranged in a ring around the central rotating rod 4 and are equidistant from the central rotating rod 4. The first stirring blade 41 and the second stirring blade 31 are parallel to the central rotating rod 4, and a transverse agitator is mounted at the front end of the central rotating rod 4.

[0046] Specifically, both ends of the first stirring blade 41 are fixed to the central rotating rod 4 through the first connecting member 42 (the first connecting member 42 and the first stirring blade 41 can be manufactured by integral molding), one end of the second stirring blade 31 is fixed to the outer shell 3 through the second connecting member 32, and the other end is fixed to the sleeve 33 through the second connecting member 32 (the second connecting member 32 and the second stirring blade 31 here can be manufactured by integral molding), and the sleeve 33 is sleeved on the central rotating rod 4.

[0047] The horizontal agitator includes a rotating shaft 5 and a third stirring blade 6. The rotating shaft 5 is coaxially connected to the central rotating rod 4 via a hexagonal joint and a pin. The third stirring blade 6 is mounted on the rotating shaft 5 and is perpendicular to the rotating shaft 5. A fourth stirring blade 7 is mounted on the outer shell 3 and is perpendicular to the outer drill rod 2. Mud holes are respectively opened and connected in the inner drill rod 1, the central rotating rod 4, and the rotating shaft 5. The rotating shaft 5 is provided with a mud outlet 51.

[0048] Example 3

[0049] like Figure 7-8As shown, an omnidirectional deep soil reinforcement forced mixing drill tool is a uniaxial drill tool, including a drill rod and a drill bit, the drill rod including an inner drill rod 1 and an outer drill rod 2, the outer drill rod 2 is sleeved on the outside of the inner drill rod 1, the inner drill rod 1 and the outer drill rod 2 are coaxially arranged, and the rotation speeds of the inner drill rod 1 and the outer drill rod 2 are different; the drill bit includes an outer shell 3 and a central rotating rod 4, the outer shell 3 is sleeved outside the central rotating rod 4, the central rotating rod 4 can rotate inside the outer shell 3, the outer shell 3 and the outer drill rod 2 are coaxially arranged, the outer shell 3 and the outer drill rod 2 are connected by a flange, a first stirring assembly is installed on the central rotating rod 4, the first stirring assembly includes three first stirring blades 41, the three first stirring blades 41 are evenly arranged in a ring with the central rotating rod 4 as the center, and the three first stirring blades 41 are at the same distance from the central rotating rod 4. A second stirring assembly is mounted on the housing 3 and includes three second stirring blades 31. The three second stirring blades 31 are evenly arranged in a ring around the central rotating rod 4 and are equidistant from the central rotating rod 4. The first stirring blade 41 and the second stirring blade 31 are parallel to the central rotating rod 4, and a transverse agitator is mounted at the front end of the central rotating rod 4.

[0050] There are two groups of first stirring blades 41, and the lower end of each group of first stirring blades 41 is fixed to the central rotating rod 4 through a first connecting piece 42. There are two groups of second stirring blades 31, and the upper end of each group of second stirring blades 31 is fixed to the outer shell 3 through a second connecting piece 32. The first stirring blades 41 and the second stirring blades 31 are arranged alternately in the radial direction.

[0051] The horizontal agitator includes a rotating shaft 5 and a third stirring blade 6. The rotating shaft 5 is coaxially connected to the central rotating rod 4 via a hexagonal joint and a pin. The third stirring blade 6 is mounted on the rotating shaft 5 and is perpendicular to the rotating shaft 5. A fourth stirring blade 7 is mounted on the outer shell 3 and is perpendicular to the outer drill rod 2. Mud holes are respectively opened and connected in the inner drill rod 1, the central rotating rod 4, and the rotating shaft 5. The rotating shaft 5 is provided with a mud outlet.

[0052] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An omnidirectional deep soil reinforcement forced mixing drill, characterized by: It includes a single-axis drilling tool and a multi-axis rotary tool, wherein the multi-axis drilling tool is composed of multiple single-axis drilling tools; The uniaxial drilling tool includes a drill rod and a drill bit; The drill rod comprises an inner drill rod and an outer drill rod, the outer drill rod is sleeved on the outer side of the inner drill rod, the inner drill rod and the outer drill rod are coaxially arranged, and the inner drill rod and the outer drill rod rotate in opposite directions or in the same direction but at different speeds; The drill bit includes an outer shell and a center rotating rod, the outer shell and the center rotating rod are rotatably connected, the outer shell is detachably connected to the outer drill rod and is coaxially arranged, the center rotating rod is detachably connected to the inner drill rod and is coaxially arranged, a first stirring assembly is installed on the center rotating rod, and a second stirring assembly is installed on the outer shell, the first stirring assembly and the second stirring assembly are respectively parallel to the center rotating rod, and a horizontal stirrer is installed at the front end of the center rotating rod.

2. The omnidirectional deep soil reinforcement forced mixing drill according to claim 1, characterized in that: The first stirring component includes one or more first stirring blades, and when there are multiple first stirring blades, they are evenly arranged in a ring shape with the central rotating rod as the center of the circle. The second stirring component includes one or more second stirring blades, and when there are multiple second stirring blades, they are evenly arranged in a ring shape with the central rotating rod as the center of the circle.

3. The omnidirectional deep soil reinforcement forced mixing drill according to claim 2, characterized in that: The two ends of the first stirring blade are respectively fixed to the central rotating rod through the first connecting piece. One end of the second stirring blade is fixed to the outer shell by the second connecting piece, and the other end is fixed to the ring. The ring is sleeved on the central rotating rod of the second connecting piece.

4. The omnidirectional deep soil reinforcement forced mixing drill according to claim 2, characterized in that: The lower end or upper end of the first stirring blade is fixed to the central rotating rod through a first connecting piece. The second stirring blade is divided into two groups. The two groups of second stirring blades and the first stirring blade are arranged alternately in the radial direction. One end of the outer second stirring blade is fixed to the outer shell through a second connecting piece, and the other end is fixed to the ring through a second connecting piece. The ring is sleeved on the central rotating rod, and the upper end or lower end of the inner second stirring blade is fixed to the second connecting piece.

5. The omnidirectional deep soil reinforcement forced mixing drill according to claim 2, characterized in that: There are multiple groups of first stirring blades, and the lower end of each group of first stirring blades is fixed to the central rotating rod through a first connecting piece. There are multiple groups of second stirring blades, and the upper end of each group of second stirring blades is fixed to the outer shell through a second connecting piece. The first stirring blades and the second stirring blades are arranged alternately in the radial direction.

6. The omnidirectional deep soil reinforcement forced mixing drill according to claim 1, characterized in that: The horizontal stirrer includes a rotating shaft and a third stirring blade. The rotating shaft is detachably connected to the central rotating rod and is coaxially arranged. The third stirring blade is installed on the rotating shaft and is perpendicular to the rotating shaft.

7. The omnidirectional deep soil reinforcement forced mixing drill according to claim 6, characterized in that: The end of the rotating shaft is sleeved on the end of the central rotating rod and is connected by a pin or a bolt.

8. The omnidirectional deep soil reinforcement forced mixing drill according to claim 1, characterized in that: A fourth stirring blade is installed on the shell, and the fourth stirring blade is perpendicular to the outer drill rod.

9. The omnidirectional deep soil reinforcement forced mixing drill according to claim 8, characterized in that: The third connecting piece is sleeved on the end of the outer drill rod and connected via a pin or a bolt.

10. The omnidirectional deep soil reinforcement forced mixing drill according to claim 6, characterized in that: Mud holes are provided on the inner drill rod, the central rotating rod and the rotating shaft and are in communication with each other. A mud outlet is provided on the rotating shaft of the third stirring blade.

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