A multi-axis multi-layer stirring drill

Abstract

A multi-axis multi-layer stirring drilling tool comprises a drill rod mechanism, a power mechanism and a cutting device. The drill rod mechanism consists of a drill rod and a drill bit (2), and the drill rod comprises at least a first drill rod (13), a second drill rod (14), a third drill rod (15), a fourth drill rod (16) and a fifth drill rod (17); each drill rod comprises at least two coaxially arranged first straight rod sections (3) and second straight rod sections (9) and a curved section (4); the cutting device is installed on the curved section and comprises a first type of cutter row (5) and a second type of cutter row (6); a multi-axis synchronous gear set (21) and a motor (1) are installed on the upper part of the drill rod. The drilling tool of the present invention contacts the sharp corners remaining on the wall after being drilled by the drill bit through the circular motion of the drill rod mechanism and flattens the wall.

Description

Technical Field

[0001] The invention relates to a multi-axis multi-layer stirring drill tool, belonging to the technical field of drilling equipment. Background Art

[0002] After 40 years of development, the columnar underground continuous wall has been widely used in my country's construction foundation pit support projects due to its advantages of short construction period and low cost. The columnar underground continuous wall technology is a special multi-axis drilling rig that drives a group of drill rods to drill into the soil layer in stages, and then rise back to the ground after reaching the target depth. During the drilling or rising of the drill rod, the end of the drill bit can inject cement slurry into the loosened soil. After the two are mixed and stirred, a section of cement soil wall is constructed; then the next section of the cement soil wall is constructed, and the adjacent two sections of the wall are overlapped; repeat the above construction to construct an underground cement soil wall; before the cement soil wall is solidified, steel sections are generally inserted to achieve the purpose of improving the wall strength. After the cement soil wall is solidified, a columnar underground continuous wall is constructed.

[0003] The main disadvantages of using the above-mentioned column-type underground continuous wall technology are: when used as a water-stop curtain, the width of the constructed wall's effective water-stop section is smaller than the pile diameter, the cement and other construction materials used in the ineffective water-stop section are wasted, and the strength of the wall is uneven (refer to Fig.10 ); Moreover, the traditional three-axis pile mixing machine commonly used in construction is limited by the number of drilling tools and has low construction efficiency. Summary of the invention

[0004] The technical problem to be solved by the present invention is that the stirring device in the prior art cannot achieve uniform wall formation and avoid the problem of weak points in anti-seepage, and a multi-axis multi-layer stirring drill is proposed.

[0005] The technical solution implemented by the present invention is as follows: a multi-axis multi-layer stirring drill tool, including a drill rod mechanism, a power mechanism and a cutting device.

[0006] A power mechanism is installed at the upper part of the drill rod mechanism; a cutting mechanism is installed at the middle part; the drill rod mechanism consists of a drill rod and a drill bit, the drill rods are arranged in cardinal number and in parallel laterally, and include at least a first drill rod, a second drill rod, a third drill rod, a fourth drill rod and a fifth drill rod; each drill rod has at least two coaxially arranged first straight rod sections and a second straight rod section and a curved section located between the first straight rod section and the second straight rod section.

[0007] The curved sections of the first drill rod, the third drill rod and the fifth drill rod are arranged in the same horizontal layer, and the curved sections are oriented in the same direction; the curved sections of the second drill rod and the fourth drill rod are arranged in the same layer in another horizontal layer, and the curved sections are oriented in the same direction and remain opposite to the curved sections of the first drill rod, the third drill rod and the fifth drill rod.

[0008] The cutting device is a combined cutting knife row, both sides of which are formed with connection structures suitable for connecting with a drill rod, and the outer side of the combined cutting knife row is formed with cutting teeth suitable for cutting the protruding parts of the surrounding soil.

[0009] The combined cutting knife row includes a first type of knife row and a second type of knife row; the two types of knife rows are fixed on the curved section of the drill rod by a fixing component in a specific manner; the first type of knife row is installed on the curved section corresponding to the first drill rod, the third drill rod and the fifth drill rod, and the second type of knife row is installed on the curved section corresponding to the second drill rod and the fourth drill rod.

[0010] The drill rod has at least two curved sections, and each of the drill rod curved sections is equipped with a combined cutting knife row of a corresponding type.

[0011] The power mechanism consists of a multi-axis synchronous gear set and an electric motor; the multi-axis synchronous gear set consists of at least five gears with the same number of teeth meshing in series; the electric motor drives the multi-axis synchronous gear set through a gearbox.

[0012] The second drill rod is located on a perpendicular bisector of the first drill rod and the third drill rod; the fourth drill rod is located on a perpendicular bisector of the third drill rod and the fifth drill rod.

[0013] The first type of cutter row is composed of two first cutter row mounting frames and a fixing device; the two first cutter row mounting frames are combined into a cutter row frame with a rectangular structure, the outer side of the long side of the rectangular cutter row frame is the first type of cutter row, and a clamp is respectively provided at the two ends and the middle of the inner side of the rectangular cutter row frame, which is firmly installed on the first drill rod, the third drill rod and the fifth drill rod through the fixing device; the second type of cutter row is composed of two second cutter row mounting frames and a fixing device; the two second cutter row mounting frames are combined into a cutter row frame with a rectangular structure, the outer side of the long side of the rectangular cutter row frame is the second type of cutter row, and a clamp is respectively provided at the two ends of the inner side of the rectangular cutter row frame, which is firmly installed on the second drill rod and the fourth drill rod through the fixing device.

[0014] The first type of cutter row and the second type of cutter row are perpendicular to the drill rod direction of the drill rod mechanism.

[0015] The straight section of the drill rod close to the multi-axis synchronous gear set is provided with spiral blades.

[0016] The beneficial effect of the present invention is that a cutting device is arranged on the drill rod. When the drill rod rotates, the cutting device installed on the curved section and the drill bit used for drilling are driven to rotate circumferentially in the same direction. In the process of vertically excavating the mixing drill bit downward, it continuously contacts the protruding parts of the soil on both sides of the continuous pile wall structure in the form of collision and cutting, so that the protruding parts of the soil are cut and destroyed to achieve a flat effect, thereby realizing a continuous wall with relatively uniform thickness.

[0017] The drill rod mechanism design of the present invention can realize the cutting device installed on the same horizontal layer bending section being rotated in the same direction as the corresponding drill rod, and the rotation direction is opposite to the rotation of the cutting device installed on the adjacent different horizontal layer bending section being rotated by the corresponding drill rod.

[0018] The cutting device of the present invention can utilize the cutting teeth on the outside of the cutting row to destroy the protruding part of the soil that is in contact by cutting; the first type of cutting row and the second type of cutting row are arranged in two layers in parallel up and down, and as the drill rod continues to rotate, the first type of cutting row and the second type of cutting row take turns to cut the protruding parts of the soil on both sides, so that the thickness of the wall on both sides is more uniform.

[0019] The combined cutting knife row arranged at the drill rod bending section of the drilling tool of the present invention can realize that more than two upper and lower positions of multiple drill rods are equipped with cutting devices, thereby realizing one-time multi-layer and multi-faceted cutting and destruction of the protruding parts of the soil during the process of the drill rod drilling vertically downward quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a front elevation view of embodiment 1 of the present invention: a multi-axis multi-layer stirring drill;

[0021] Figure 2 for Figure 1 A side view of the multi-axis multi-layer stirring drill tool shown;

[0022] Figure 3 (a) shows Figure 1 The schematic diagram of the structure of the cutting device of the multi-axis multi-layer stirring drill tool is shown;

[0023] FIG3( b ) is a side view of the cutting device of FIG3( a );

[0024] Figure 4 It is a schematic diagram of the operation process of the synchronous gear set of the multi-axis multi-layer mixing drill;

[0025] Figure 5 It is a schematic diagram of the first working state of the cutting device of the multi-axis multi-layer stirring drill;

[0026] Figure 6 It is a schematic diagram of the second working state of the cutting device of the multi-axis multi-layer stirring drill;

[0027] Figure 7 It is a schematic diagram of the third working state of the cutting device of the multi-axis multi-layer stirring drill;

[0028] Figure 8 This is Embodiment 2 of the present invention: a front elevation view of a multi-axis multi-layer stirring drill;

[0029] Fig. 9 for Figure 7 A side view of the cutting device of the multi-axis multi-layer stirring drill tool shown;

[0030] Fig.10 It is a cross-sectional shape diagram of a column-type underground continuous wall constructed using existing technology;

[0031] Fig.11 It is a cross-sectional shape diagram of an underground continuous wall of equal thickness constructed by applying the technical device of the present invention;

[0032] In the figure: 1 is a motor; 2 is a drill bit; 3 and 3' are the first straight rod section; 4 is the first curved section, 5 is the first type of cutter row; 6 is the second type of cutter row; 7 is a cutting tooth; 8 is a drill rod mounting hole; 9 and 9' are the second straight rod section; 10 is the first cutter row mounting frame; 11 is the second cutter row mounting frame; 12 is the second curved section; 13 is the first drill rod; 14 is the second drill rod; 15 is the third drill rod; 16 is the fourth drill rod; 17 is the fifth drill rod; 18 is a fixing device; 19 is the third curved section; 20 is the fourth curved section; 21 is a multi-axis synchronous gear set. DETAILED DESCRIPTION

[0033] Example 1

[0034] like Figure 1 As shown, a multi-axis multi-layer stirring drill tool of this embodiment,

[0035] The drill rods of this embodiment are specifically a first drill rod 13, a second drill rod 14, a third drill rod 15, a fourth drill rod 16 and a fifth drill rod 17, and a drill bit 2 located at the lower part of the drill rod; two adjacent drill bits are arranged in parallel in the horizontal direction, and the projections in the vertical direction have overlapping parts; the first drill rod 13, the third drill rod 15 and the fifth drill rod 17 at least include two coaxially arranged first straight rod sections 3 and second straight rod sections 9, and a curved section 4 located between the first straight rod section 3 and the second straight rod section 9, and the orientation of the curved section 4 is consistent; the second drill rod 14 and the fourth drill rod 16 at least include two coaxially arranged first straight rod sections 3´ and a second straight rod section 9´, and a curved section 12 located between the first straight rod section 3´ and the second straight rod section 9´, and the orientation of the curved sections is consistent, but opposite to the orientation of the curved sections of the first drill rod 13, the third drill rod 15 and the fifth drill rod 17; the multi-axis multi-layer stirring drill tool also includes: a first cutting device 5 and a second cutting device 6, which are installed at the curved sections 4 and 12; they are suitable for contacting and flattening the wall through circumferential movement with the remaining sharp corners of the wall after being drilled by the drill bit when driven by the drill rod rotation; wherein, at least one of the cutting devices is installed together on the curved sections of at least two drill rods that rotate synchronously and in the same direction.

[0036] like Figure 3a As shown, the combined cutting knife row includes a first type of knife row 5 and a second type of knife row 6. The first type of knife row 5 is fixedly connected together by a first knife row part 10 and a second knife row part 11 through a fixing component 18, wherein the outer sides of the first knife row part 10 and the second knife row part 11 are formed with cutting teeth 7, and the first knife row mounting frame 10 and the second knife row mounting frame 11 are respectively formed with a hoop structure on both sides. When the first knife row mounting frame 10 and the second knife row mounting frame 11 are fixedly combined together through the fixing device 18, the hoop part forms a drill rod mounting hole 8 for the curved section of the drill rod to pass through, that is, the connecting structure. As one embodiment, the fixing component is bolted and fixed, and the hoop of the first knife row mounting frame 10 and the hoop of the second knife row mounting frame 11 are clamped on the curved section of the drill rod, and the diameter of the drill rod mounting hole formed by the two corresponding hoop is continuously reduced by continuously tightening the bolt, so as to clamp on the curved section of the drill rod.

[0037] The combined cutting knife row has a through hole structure in the middle, and an area for the drill rods between the drill rods that fix the combined cutting knife row is reserved, and the through hole structure has a large enough space, so that the combined cutting knife row will not touch other drill rods during the rotation of the drill rods. The second type of knife row 6 is similar to the first type of knife row 5 in terms of component composition, wherein the first type of knife row 5 is installed on the first drill rod 13, the third drill rod 15 and the fifth drill rod 17 corresponding to the bending section 4, and the second type of knife row 6 is installed on the second drill rod 14 and the fourth drill rod 16 corresponding to the bending section 12.

[0038] like Figure 4 As shown, the drill rods are coupled to each other at the power end through a multi-axis synchronous gear set 21. Under the drive of the motor 1, the first drill rod 13, the third drill rod 15 and the fifth drill rod 17 can rotate synchronously and counterclockwise in the same direction; at the same time, the second drill rod 14 and the fourth drill rod 16 can rotate synchronously and clockwise in the same direction.

[0039] like Figure 5-7 As shown, they are schematic diagrams of the first working state, the second working state and the third working state of the first device when a multi-axis multi-layer mixing drill is used in this embodiment; it can be known from the figure that the cutting device, that is, the combined knife row as one embodiment, the first type knife row 5 and the second type knife row 6 are arranged in two layers in parallel up and down, and as the first drill rod 13, the third drill rod 15 and the fifth drill rod 17 rotate counterclockwise, during the movement from the 3 o'clock position to the 12 o'clock position of the clock, the first type knife row 5 cuts the protruding part of the upper soil body to make the thickness of the side wall uniform; at the same time, the second drill rod 14 and the fourth drill rod 16 rotate clockwise, and during the movement from the 3 o'clock position to the 6 o'clock position of the clock, the second type knife row 6 cuts the protruding part of the lower soil body to make the thickness of the side wall uniform; in the above operation process, Figure 4 The rotation direction of each drill rod can be seen from the principle that the upper side of the first type of cutter row 5 and the lower side of the second type of cutter row 6 are both subject to horizontal resistance from the soil to the left; at the same time, the first type of cutter row 5 and the second type of cutter row 6 contact the protruding parts of the soil on both sides in the form of opposite circumferential rotation, and generate an irreversible rotation torque that may affect the stability of the drill rod mechanism. As the drill rod continues to rotate, the first type of cutter row 5 and the second type of cutter row 6 take turns cutting the protruding parts of the soil on both sides, making the wall thickness on both sides more uniform, thereby forming a wall as shown in FIG. Figure 7 A wall of uniform thickness is shown.

[0040] Example 2

[0041] like Figure 8As shown, the difference between the multi-axis multi-layer stirring drill tool of this embodiment and the above embodiment is that: the two drill rods rotating synchronously and in the same direction have two bending sections, and the first type of cutter row 5 is installed on the corresponding bending sections 4 and 19 of the first drill rod 13, the third drill rod 15 and the fifth drill rod 17, and the first type of cutter row 6 is installed on the corresponding bending sections 12 and 20 of the second drill rod 14 and the fourth drill rod 16. The above design, as a preferred embodiment, can realize that the positions of the upper and lower four layers of a group of drill rods are all provided with cutting devices.

[0042] In addition, referring to the working state in Example 1, Fig. 9 As shown, in this embodiment, the bending section 4 and the bending section 19 on the same drill rod are oriented in different directions, and the bending section 12 and the bending section 20 are oriented in different directions, so that when the drill rod is driven and coupled to rotate, the resistance encountered by the first type of cutter row 5 mounted on the bending section 19 and the second type of cutter row 6 mounted on the bending section 20 in contact with the soil can offset the resistance encountered by the first and second layers of cutter rows, and the rotational torque generated on the drill rod mechanism can also offset each other; the first type of cutter row 5 and the second type of cutter row 6 are increased in pairs in the form of pairs, which can better avoid one pair of cutter rows from generating a unidirectional force and a large rotational torque under the restriction of the rotation direction of the drill rod, and make the force of the entire mixing device more balanced and uniform, while increasing the contact area of ​​the protruding part of the soil body that is cut at one time, improving the construction efficiency, and further optimizing the mechanical operation capacity.

[0043] Obviously, the above-mentioned embodiments only express different implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that for ordinary technicians in the relevant field, other different forms of deformation and improvement can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A multi-axis multi-layer stirring drill, comprising a drill rod mechanism, a power mechanism and a cutting device; characterized in that: The upper part of the drill rod mechanism is equipped with a power mechanism; the middle part is equipped with a cutting device; the drill rod mechanism is composed of a drill rod and a drill bit, the drill rods are odd in number and arranged in parallel transversely, and at least include a first drill rod, a second drill rod, a third drill rod, a fourth drill rod and a fifth drill rod; each drill rod has at least two coaxially arranged first straight rod sections and a second straight rod section and a curved section located between the first straight rod section and the second straight rod section; The curved sections of the first drill rod, the third drill rod and the fifth drill rod are arranged in the same horizontal layer, and the curved sections are oriented in the same direction; the curved sections of the second drill rod and the fourth drill rod are arranged in the same layer in another horizontal layer, and the curved sections are oriented in the same direction and are kept opposite to the curved sections of the first drill rod, the third drill rod and the fifth drill rod; The cutting device is a combined cutting knife row, and the two sides of the combined cutting knife row are formed with connection structures suitable for connecting with the drill rod, and the outer side of the combined cutting knife row is formed with cutting teeth suitable for cutting the protruding parts of the surrounding soil; The combined cutting knife row comprises a first type knife row and a second type knife row; the two types of knife rows are fixed on the curved section of the drill rod by a fixing component; the first type knife row is installed on the curved section corresponding to the first drill rod, the third drill rod and the fifth drill rod, and the second type knife row is installed on the curved section corresponding to the second drill rod and the fourth drill rod; The power mechanism consists of a multi-axis synchronous gear set and an electric motor; the multi-axis synchronous gear set consists of at least five gears with the same number of teeth meshing in series; the electric motor drives the multi-axis synchronous gear set through a gearbox.

2. A multi-axis multi-layer stirring drill according to claim 1, characterized in that: The drill rod has at least two curved sections, and each of the drill rod curved sections is equipped with a combined cutting knife row of a corresponding type.

3. The multi-axis multi-layer stirring drill according to claim 1, characterized in that: The second drill rod is located on a perpendicular bisector of the first drill rod and the third drill rod; the fourth drill rod is located on a perpendicular bisector of the third drill rod and the fifth drill rod.

4. The multi-axis multi-layer stirring drill according to claim 1, characterized in that: The first type of cutter row is composed of two first cutter row mounting frames and a fixing device; the two first cutter row mounting frames are combined into a cutter row frame with a rectangular structure, the outer side of the long side of the rectangular cutter row frame is the first type of cutter row, and a clamp is respectively provided at the two ends and the middle of the inner side of the rectangular cutter row frame, and the clamp is firmly installed on the first drill rod, the third drill rod and the fifth drill rod through the fixing device; the second type of cutter row is composed of two second cutter row mounting frames and a fixing device; the two second cutter row mounting frames are combined into a cutter row frame with a rectangular structure, the outer side of the long side of the rectangular cutter row frame is the second type of cutter row, and a clamp is respectively provided at the two ends of the inner side of the rectangular cutter row frame, and the clamp is firmly installed on the second drill rod and the fourth drill rod through the fixing device.

5. The multi-axis multi-layer stirring drill according to claim 1, characterized in that: The first type of cutter row and the second type of cutter row are perpendicular to the drill rod direction of the drill rod mechanism.

6. The multi-axis multi-layer stirring drill according to claim 1, characterized in that: The straight section of the drill rod close to the multi-axis synchronous gear set is provided with spiral blades.

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