An omnidirectional deep soil reinforcement compulsory stirring drill

Abstract

The utility model provides a kind of omnidirectional deep soil reinforcement forced mixing drill, including single-shaft drill and multi-shaft rotating tool, and multi-shaft drill is combined by multiple single-shaft drills;Single-shaft drill includes drill rod and drill bit;The drill rod includes inner drill rod and outer inner drill rod, outer drill rod is sleeved on the outside of inner drill rod, inner drill rod and outer drill rod are coaxially arranged, the rotating direction of inner drill rod and outer drill rod is opposite or rotating direction is same and speed is different;Drill bit includes shell and center rotating rod, shell and center rotating rod are rotatably connected, shell is detachably connected with outer drill rod and is coaxially arranged, the center rotating rod is detachably connected with inner drill rod and is coaxially arranged, first mixing assembly is installed on center rotating rod, second mixing assembly is installed on shell, first mixing assembly and second mixing assembly are respectively parallel with center rotating rod, the front end of center rotating rod is equipped with transverse stirrer, with the characteristics that first mixing assembly and second mixing assembly can form longitudinal mutual shearing to make good stirring effect.

Description

Technical Field

[0001] This utility model relates to the field of construction equipment, and in particular to an omnidirectional deep soil reinforcement forced mixing drill. Background Technology

[0002] When the foundation is non-load-bearing, pre-reinforcement is required. The presence of surrounding buildings and underground works further complicates the reinforcement process. Therefore, to prevent ground subsidence and collapse during underground construction projects such as subways and utility tunnels, which could damage underground infrastructure and pipelines, and even cause economic losses and casualties, it is essential to implement necessary reinforcement measures for soft soil foundations.

[0003] Currently, deep mixing reinforcement is commonly used for soft soil foundation reinforcement in my country. Deep mixing reinforcement involves rotating the blades of a mixer to mix a solidifying agent such as lime or cement with the soft soil. To achieve multi-directional, three-dimensional mixing, patent application CN 118187032 A discloses an omnidirectional mixing drill and construction method. In this method, 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 and rotatably connected to a housing. One end of the second rotating rod extends through the housing, and the second mixing blade is fixed to the portion of the second rotating rod extending through the housing. A first bevel gear is installed at the other end of the second rotating rod, and a second bevel gear is installed on the first rotating rod, with the first and second bevel gears meshing.

[0004] The aforementioned drilling tool has a complex structure, with high precision requirements for the bevel gear and a high degree of sealing for the outer casing, resulting in high production costs and a susceptibility to malfunctions during use. Furthermore, the large size of the casing means that, in actual use, when the soil viscosity is high, the mixture of mud and cement slurry can easily adhere to the casing, potentially even clogging the second mixing device and significantly reducing the longitudinal mixing effect. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides an omnidirectional deep soil reinforcement forced mixing drill, which has the characteristics of simple structure, convenient 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, including a single-axis drill tool and a multi-axis rotary tool, wherein the multi-axis drill tool is composed of multiple single-axis drill tools;

[0007] The single-axis drilling tool includes a drill rod and a drill bit;

[0008] The drill rod includes an inner drill rod and an outer drill rod, with the outer drill rod sleeved on the outside 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 at different speeds.

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

[0010] Preferably, the first stirring assembly includes one or more first stirring blades, which are arranged in a ring around the central rotating rod when there are multiple first stirring blades. The second stirring assembly includes one or more second stirring blades, which are arranged in a ring around the central rotating rod when there are multiple second stirring blades.

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

[0012] Preferably, the lower or upper end of the first stirring blade is fixed to the central rotating rod by a first connecting member. The second stirring blade consists of two sets, which are arranged alternately with the first stirring blade in the radial direction. One end of the outer second stirring blade is fixed to the outer shell by a second connecting member, and the other end is fixed to the collar by a second connecting member. The collar is fitted onto the central rotating rod. The upper or lower end of the inner second stirring blade is fixed to the second connecting member.

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

[0014] Preferably, the transverse 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 mounted 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 bolt.

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

[0017] Preferably, the outer casing is fitted onto the end of the outer drill rod and connected by a pin or bolt.

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

[0019] The beneficial effects of this utility model are as follows:

[0020] 1. The inner and outer drill rods rotate in opposite directions or in the same direction but at different speeds, so that the first and second mixing components can form longitudinal mutual shearing. This can effectively prevent the mixture of soil and cement slurry from sticking 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, thus making the mixing effect better than the existing technology.

[0021] 2. The first and second mixing components are parallel to the central rotating rod, and the third and fourth mixing blades are perpendicular to the central rotating rod. The combination of horizontal and longitudinal mixing achieves omnidirectional mixing, which greatly improves the mixing effect and the quality of pile formation.

[0022] 3. This utility model has a simple structure, is easy to install, and has low production costs.

[0023] 4. A detachable connection is used between the drill bit and the rotating rod, which facilitates the installation and removal of 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 malfunction. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0026] Figure 1 This is a schematic diagram of the structure 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 This is a schematic diagram of the dual-axis drilling tool structure in Example 1;

[0030] Figure 5 This is a schematic diagram of the triaxial drilling tool structure in Example 1;

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

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

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

[0034] Figure 9 for Figure 8 CC section 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 Implementation

[0036] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model; however, this utility model may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0037] Secondly, the term "an embodiment" or "embodiment" as used 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 different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0038] Example 1

[0039] like Figure 1-3As shown, an omnidirectional deep soil reinforcement forced mixing drill is a single-axis drill, including a drill rod and a drill bit. The drill rod includes an inner drill rod 1 and an outer drill rod 2, with the outer drill rod 2 sleeved outside the inner drill rod 1. The inner and outer drill rods are coaxially arranged, and the inner drill rod 1 and the outer drill rod 2 rotate at different speeds. The drill bit includes a housing 3 and a central rotating rod 4. The housing 3 is sleeved outside the central rotating rod 4, and the central rotating rod 4 can rotate inside the housing 3. The housing 3 and the outer drill rod 2 are coaxially arranged and 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 is sleeved with the inner drill rod 1 through a hexagonal joint. A first mixing assembly is installed on the central rotating rod 4. The first mixing assembly includes three first mixing blades 41, which are evenly arranged in a ring around the central rotating rod 4, and the distance between the three first mixing blades 41 and the central rotating rod 4 is the same. A second stirring assembly is installed on the outer casing 3. The second stirring assembly includes three second stirring blades 31, which are evenly arranged in a ring around the central rotating rod 4. The distance between the three second stirring blades 31 and the central rotating rod 4 is the same. The first stirring blade 41 and the second stirring blades 31 are parallel to the central rotating rod 4, and a transverse stirrer is installed 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 via the first connecting member 42. There are two sets of second stirring blades 31, which are arranged alternately with the first stirring blade 41 in the radial direction. One end of the outer second stirring blade 31 is fixed to the outer shell 3 via the second connecting member 32, and the other end is fixed to the collar 33 via the second connecting member 32. The collar 33 is fitted onto the central rotating rod 4. The upper end of the inner second stirring blade 31 is fixed to the second connecting member 32.

[0041] The transverse agitator includes a rotating shaft 5 and a third agitator 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 enables circumferential positioning, and the pin passes through the rotating shaft 5 and the central rotating rod 4 to achieve both circumferential and axial positioning. The third agitator blade 6 is mounted on the rotating shaft 5 and is perpendicular to it. A fourth agitator blade 7 is mounted on the outer casing 3, and the fourth agitator blade 7 is perpendicular to the outer drill rod 2. Mud holes are respectively opened on the inner drill rod 1, the central rotating rod 4, and the rotating shaft 5 and are interconnected. A mud outlet is provided on the rotating shaft 5.

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

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

[0044] Example 2

[0045] like Figure 6-7 As shown, an omnidirectional deep soil reinforcement forced mixing drill is a single-axis drill, including a drill rod and a drill bit. The drill rod includes an inner drill rod 1 and an outer drill rod 2, with the outer drill rod 2 sleeved outside the inner drill rod 1. The inner drill rod 1 and the outer drill rod 2 are coaxially arranged, and their rotational speeds are different. The drill bit includes a housing 3 and a central rotating rod 4. The housing 3 is sleeved outside the central rotating rod 4, and the central rotating rod 4 can rotate inside the housing 3. The housing 3 and the outer drill rod 2 are coaxially arranged and 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 is sleeved with the inner drill rod 1 through a hexagonal joint. A first mixing assembly is installed on the central rotating rod 4. The first mixing assembly includes three first mixing blades 41, which are evenly arranged in a ring around the central rotating rod 4, and the distance between the three first mixing blades 41 and the central rotating rod 4 is the same. A second stirring assembly is installed on the outer casing 3. The second stirring assembly includes three second stirring blades 31, which are evenly arranged in a ring around the central rotating rod 4. The distance between the three second stirring blades 31 and the central rotating rod 4 is the same. The first stirring blade 41 and the second stirring blades 31 are parallel to the central rotating rod 4, and a transverse stirrer is installed at the front end of the central rotating rod 4.

[0046] Specifically, the two ends of the first stirring blade 41 are fixed to the central rotating rod 4 by the first connecting piece 42 (the first connecting piece 42 and the first stirring blade 41 can be manufactured as one piece). One end of the second stirring blade 31 is fixed to the outer shell 3 by the second connecting piece 32, and the other end is fixed to the collar 33 by the second connecting piece 32 (the second connecting piece 32 and the second stirring blade 31 can be manufactured as one piece). The collar 33 is fitted onto the central rotating rod 4.

[0047] The transverse agitator includes a rotating shaft 5 and a third agitator blade 6. The rotating shaft 5 is connected to the central rotating rod 4 via a hexagonal joint and a pin, and is coaxially arranged. The third agitator blade 6 is mounted on the rotating shaft 5 and is perpendicular to the rotating shaft 5. A fourth agitator blade 7 is mounted on the outer casing 3, and the fourth agitator blade 7 is perpendicular to the outer drill rod 2. The inner drill rod 1, the central rotating rod 4, and the rotating shaft 5 are each provided with mud holes that are connected to each other. 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 is a single-axis drill, including a drill rod and a drill bit. The drill rod includes an inner drill rod 1 and an outer drill rod 2, with the outer drill rod 2 sleeved outside the inner drill rod 1. The inner drill rod 1 and the outer drill rod 2 are coaxially arranged, and the inner drill rod 1 and the outer drill rod 2 rotate at different speeds. The drill bit includes a housing 3 and a central rotating rod 4. The housing 3 is sleeved outside the central rotating rod 4, and the central rotating rod 4 can rotate inside the housing 3. The housing 3 and the outer drill rod 2 are coaxially arranged and connected by a flange. A first mixing assembly is installed on the central rotating rod 4. The first mixing assembly includes three first mixing blades 41, which are evenly arranged in a ring around the central rotating rod 4, and the distance between the three first mixing blades 41 and the central rotating rod 4 is the same. A second stirring assembly is installed on the outer casing 3. The second stirring assembly includes three second stirring blades 31, which are evenly arranged in a ring around the central rotating rod 4. The distance between the three second stirring blades 31 and the central rotating rod 4 is the same. The first stirring blade 41 and the second stirring blades 31 are parallel to the central rotating rod 4, and a transverse stirrer is installed at the front end of the central rotating rod 4.

[0050] The first stirring blade 41 consists of two sets, with the lower end of each set of the first stirring blade 41 fixed to the central rotating rod 4 via the first connecting member 42. The second stirring blade 31 consists of two sets, with the upper end of each set of the second stirring blade 31 fixed to the outer shell 3 via the second connecting member 32. The first stirring blade 41 and the second stirring blade 31 are arranged alternately in the radial direction.

[0051] The transverse agitator includes a rotating shaft 5 and a third agitator blade 6. The rotating shaft 5 is connected to the central rotating rod 4 via a hexagonal joint and a pin, and is coaxially arranged. The third agitator blade 6 is mounted on the rotating shaft 5 and is perpendicular to the rotating shaft 5. A fourth agitator blade 7 is mounted on the outer casing 3, and the fourth agitator blade 7 is perpendicular to the outer drill rod 2. The inner drill rod 1, the central rotating rod 4, and the rotating shaft 5 are each provided with mud holes that are connected to each other. 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 solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A forced mixing drill for omnidirectional deep soil reinforcement, characterized in that: It includes single-axis drilling tools and multi-axis rotary tools, wherein the multi-axis drilling tool is composed of multiple single-axis drilling tools; The single-axis drilling tool includes a drill pipe and a drill bit; The drill rod includes an inner drill rod and an outer drill rod. The outer drill rod is sleeved on the outside of the inner drill rod. The inner drill rod and the outer drill rod are coaxially arranged. 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 a housing and a central rotating rod, which are rotatably connected. The housing is detachably connected to the outer drill rod and is coaxially arranged. The central rotating rod is detachably connected to the inner drill rod and is coaxially arranged. A first stirring assembly is installed on the central rotating rod, and a second stirring assembly is installed on the housing. The first stirring assembly and the second stirring assembly are parallel to the central rotating rod, respectively. A transverse stirrer is installed at the front end of the central rotating rod.

2. The omnidirectional deep soil reinforcement forced mixing drill tool according to claim 1, characterized in that: The first stirring assembly includes one or more first stirring blades, which are evenly arranged in a ring around the central rotating rod when there are multiple first stirring blades. The second stirring assembly includes one or more second stirring blades, which are evenly arranged in a ring around the central rotating rod when there are multiple second stirring blades.

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

4. The omnidirectional deep soil reinforcement forced mixing drill tool according to claim 2, characterized in that: The first stirring blade has at least one set, and the lower end or upper end of each first stirring blade is fixed to the central rotating rod by a first connector. The second stirring blade has at least two sets, and the second stirring blade 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 by a second connector, and the other end is fixed to the collar by a second connector. The collar is sleeved on the central rotating rod. The upper end or lower end of the inner second stirring blade is fixed to the second connector.

5. The omnidirectional deep soil reinforcement forced mixing drill tool according to claim 2, characterized in that: The first stirring blades are in multiple sets, and the lower end of the first stirring blade in each set is fixed to the central rotating rod by a first connector. The second stirring blades are in multiple sets, and the upper end of the second stirring blade in each set is fixed to the outer shell by a second connector. 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 tool according to claim 1, characterized in that: The transverse 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 tool according to claim 6, characterized in that: The end of the rotating shaft is sleeved on the end of the central rotating rod and connected by a pin or bolt.

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

9. The omnidirectional deep soil reinforcement forced mixing drill tool according to claim 8, characterized in that: The outer casing is fitted onto the end of the outer drill rod and connected by a pin or bolt.

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

Images