Single-shaft bidirectional cement mixing pile

Abstract

The utility model relates to the technical field of cement mixing piles, in particular to a single-shaft bidirectional cement mixing pile which comprises two guide frames which are symmetrically arranged, a lifting mechanism is arranged between the two guide frames, a driving motor is installed on the lifting mechanism, the output end of the driving motor is connected with an inner drill rod, and the output end of the inner drill rod is connected with an outer drill rod. The inner drill rod penetrates through the lifting mechanism and is vertically arranged, the lower end of the inner drill rod is provided with a drill bit, the inner drill rod is sleeved with an outer sleeve rod, the upper end of the outer sleeve rod is fixedly connected with the lifting mechanism, and the outer sleeve rod is provided with multiple sets of bidirectional stirring blade assemblies. Bidirectional rotation of the stirring blades can be achieved through single-power driving, and the problem that the structure of a stirring pile is too complex due to the fact that multi-power driving is needed for achieving bidirectional rotation of the stirring blades is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of cement mixing piles, in particular to a uniaxial bidirectional cement mixing pile. Background Art

[0002] Cement mixing piles are an effective method for treating soft foundations. Using cement as the main curing agent, a mixing pile machine sprays cement into the soil and mixes it thoroughly. This allows a series of physical and chemical reactions between the cement and the soil to occur, hardening the soft soil and improving foundation strength. Cement mixing piles are categorized by their primary construction method as single-axis, dual-axis, and triple-axis mixing piles. Cement mixing piles require a mixing pile drill stem mechanism. Single-axis mixing piles, with their mixing blades rotating in one direction, can easily result in uneven mixing, like a crenellated pancake. Bidirectional mixing piles, with their coaxial outer and inner drill stems, allow for forward and reverse rotation, ensuring a more even mixing of cement and soil and improving pile quality. Existing bidirectional mixing piles generally utilize a multi-power drive system, in which a motor is added to the drill bit to drive the mixing blades. However, this solution is difficult to implement due to the limited internal space of the drill bit. Other drill bits utilize a stop plate to constrain the movement of a component, preventing rotation. However, the internal structure of these drill bits is often complex. Utility Model Content

[0003] In order to solve the problems of the above-mentioned prior art, the utility model provides a single-axis bidirectional cement mixing pile, which can use a single power drive to achieve bidirectional rotation of the mixing blade, solving the problem that the mixing pile structure is too complicated due to the need for multiple power drives to achieve bidirectional rotation of the mixing blade.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a single-axis bidirectional cement mixing pile, comprising two symmetrically arranged guide frames, a lifting mechanism is arranged between the two guide frames, a driving motor is installed on the lifting mechanism, the output end of the driving motor is connected to an inner drill rod, the inner drill rod passes through the lifting mechanism and is vertically arranged, a drill bit is provided at the lower end of the inner drill rod, an outer rod is sleeved on the inner drill rod, the upper end of the outer rod is fixedly connected to the lifting mechanism, and a plurality of groups of bidirectional stirring blade assemblies are provided on the outer rod.

[0005] Preferably, the bidirectional stirring blade assembly includes a driving gear fixedly mounted on the inner drill rod, the driving gear meshing with the driving bevel gear, the driving bevel gear is fixedly connected to a connecting shaft on the side away from the central axis of the inner drill rod, the other end of the connecting shaft passes through the outer rod and is fixedly connected to the driven bevel gear, the upper and lower ends of the driven bevel gear are respectively meshed with the upper driven gear and the lower driven gear, the upper driven gear and the lower driven gear are respectively fixedly connected to the upper sleeve and the lower sleeve, the upper sleeve and the lower sleeve are both rotatably sleeved on the outer rod, and the outer side walls of the upper sleeve and the lower sleeve are fixedly connected with rotary digging blades.

[0006] The driving motor drives the inner drill rod to rotate, and then drives the driving gear sleeved on the inner drill rod to rotate. Since the driving gear is meshed with the active bevel gear, the driving bevel gear and the driven bevel gear are driven to rotate. Since the upper driven gear and the lower driven gear are meshed with the driven bevel gear, the driven bevel gear drives the upper driven gear and the lower driven gear to rotate, and the rotation directions of the upper driven gear and the lower driven gear are opposite. Therefore, the upper sleeve and the lower sleeve connected to the upper driven gear and the lower driven gear respectively rotate relative to each other, and the rotary drilling blades arranged on the upper sleeve and the lower sleeve rotate relative to each other. The cement mixing pile drill bit with bidirectional rotating mixing blades provided by the embodiment of the utility model only needs to rotate the inner drill rod to realize the relative rotation of the upper and lower pairs of rotary drilling blades, which is beneficial to improving the uniformity of mixing foundation soil and cement slurry and improving the quality of pile formation.

[0007] Preferably, the cross section of the guide frame is U-shaped, the grooves of the two guide frames are opposite to each other, a rack is fixedly connected in the groove of the guide frame along the length direction, and sliding grooves are opened on the two side walls of the guide frame along the length direction.

[0008] Preferably, the lifting mechanism includes a lifting plate installed between the two guide frames, and a rotating shaft rotatably connected to the left and right ends of the guide frames. Both ends of the rotating shaft pass through the slide groove and can slide up and down in the slide groove. One end of the rotating shaft is connected to the output end of the rotating motor. A gear is fixed in the middle of the rotating shaft, and the gear is meshed with the rack.

[0009] With the above-mentioned structural design, the up and down displacement of the lifting mechanism is achieved through the cooperation of the gear and the rack, thereby controlling the up and down movement of the drill bit and the bidirectional stirring blade assembly arranged at the lower end of the lifting mechanism. Compared with the existing technology, this method can generate a greater downward pressure on the inner drill rod and the drill bit, enabling the drill bit and the rotary drilling blade to effectively drill holes, thereby improving work efficiency and increasing the practicality of the device.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] 1. The cement mixing pile drill bit with bidirectionally rotating mixing blades provided in the embodiment of the utility model can realize relative rotation of the upper and lower rotary drilling blades by simply rotating the inner drill rod, which is beneficial to improving the uniformity of mixing the foundation soil and cement slurry and improving the quality of the pile;

[0012] 2. The up and down displacement of the lifting mechanism is achieved through the cooperation of the gear and the rack, thereby controlling the up and down movement of the drill bit and the bidirectional stirring blade assembly arranged at the lower end of the lifting mechanism. Compared with the existing technology, this method can generate a greater downward pressure on the inner drill rod and the drill bit, enabling the drill bit and the rotary drilling blade to effectively drill holes, thereby improving work efficiency and increasing the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the utility model;

[0014] Figure 2 This is a structural diagram of the guide frame and lifting mechanism of the utility model;

[0015] Figure 3 This is a schematic structural diagram of the bidirectional stirring blade assembly of the utility model;

[0016] Figure 4 This is a schematic diagram of the internal structure of the bidirectional stirring blade assembly of the utility model;

[0017] Figure 5 This is a schematic diagram of the internal structure of the outer sleeve of the utility model;

[0018] Figure 6 This is a top view of the lifting assembly of the utility model. DETAILED DESCRIPTION

[0019] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0020] See also Figure 1-6The utility model provides a technical solution: a uniaxial bidirectional cement mixing pile, comprising two symmetrically arranged guide frames 1, a lifting mechanism 2 is arranged between the two guide frames 1, a driving motor 7 is installed on the lifting mechanism, the output end of the driving motor 7 is connected to an inner drill rod 4, the inner drill rod 4 passes through the lifting mechanism 2 and is vertically arranged, a drill bit 5 is provided at the lower end of the inner drill rod 4, an outer rod 3 is sleeved on the inner drill rod 4, the upper end of the outer rod 3 is fixedly connected to the lifting mechanism 2, and a plurality of groups of bidirectional stirring blade assemblies 6 are provided on the outer rod 3.

[0021] The bidirectional stirring blade assembly 6 includes a driving gear 604 fixedly mounted on the inner drill rod 4, the driving gear 604 is meshed with a driving bevel gear 607, and the driving bevel gear 607 is fixedly connected to a connecting shaft 609 on the side away from the central axis of the inner drill rod 4, the other end of the connecting shaft 609 passes through the outer rod 3 and is fixedly connected to a driven bevel gear 608, and the upper and lower ends of the driven bevel gear 608 are respectively meshed with an upper driven gear 605 and a lower driven gear 606, the upper driven gear 605 and the lower driven gear 606 are respectively fixedly connected to the upper sleeve 601 and the lower sleeve 602, the upper sleeve 601 and the lower sleeve 602 are both rotatably sleeved on the outer rod 3, and the outer side walls of the upper sleeve 601 and the lower sleeve 602 are fixedly connected with rotary digging blades 603. The driving motor 7 drives the inner drill rod 4 to rotate, and then drives the driving gear 604 sleeved on the inner drill rod 4 to rotate. Since the driving gear 604 is meshed with the driving bevel gear 607, the driving bevel gear 607 and the driven bevel gear 608 are driven to rotate. Since the upper driven gear 605 and the lower driven gear 606 are meshed with the driven bevel gear 608, the driven bevel gear 608 drives the upper driven gear 605 and the lower driven gear 606 to rotate, and the upper driven gear 605 and the lower driven gear 606 are meshed. 06 rotates in opposite directions, so the upper sleeve 601 and the lower sleeve 602 connected to the upper driven gear 605 and the lower driven gear 606 respectively rotate relative to each other, and the rotary drilling blades 603 arranged on the upper sleeve 601 and the lower sleeve 602 rotate relative to each other. The cement mixing pile drill bit with bidirectional rotating mixing blades provided in the embodiment of the utility model only needs to rotate the inner drill rod 4 to realize the relative rotation of the upper and lower pairs of rotary drilling blades 603, which is beneficial to improve the uniformity of mixing the foundation soil and cement slurry and improve the quality of the pile.

[0022] The cross section of the guide frame 1 is U-shaped, the grooves of the two guide frames 1 are opposite to each other, a rack 102 is fixedly connected in the groove of the guide frame 1 along the length direction, and a sliding groove 101 is opened on the two side walls of the guide frame 1 along the length direction.

[0023] The lifting mechanism 2 includes a lifting plate 201 installed between the two guide frames 1, a rotating shaft 204 rotatably connected to the left and right ends of the guide frames 1, both ends of the rotating shaft 204 pass through the slide 101 and can slide up and down in the slide 101, one end of the rotating shaft 204 is connected to the output end of the rotating motor 202, and a gear 203 is fixedly sleeved in the middle of the rotating shaft 204, and the gear 203 is meshed with the rack 102. The up and down displacement of the lifting mechanism 2 is achieved by the cooperation of the gear 203 and the rack 102, thereby controlling the up and down movement of the drill bit 5 and the two-way stirring blade assembly 6 arranged at the lower end of the lifting mechanism 2. Compared with the prior art, this method can generate a greater downward pressure on the inner drill rod 4 and the drill bit 5, enabling the drill bit 5 and the rotary drilling blade 603 to effectively drill holes, thereby improving work efficiency and increasing the practicality of the device.

[0024] Two rotary digging blades 603 are symmetrically fixedly connected to the outer side walls of the upper sleeve 601 and the lower sleeve 602 . The rotary digging blades 603 on the upper sleeve 601 are arranged perpendicular to the rotary digging blades 603 on the lower sleeve 602 .

[0025] Working principle: put the guide frame 1 in place on the rotary drilling pile position on the soft soil foundation, start the drive motor 7, the drive motor 7 drives the inner drill rod 4 to rotate, and then drives the driving gear 604 set on the inner drill rod 4 to rotate, because the driving gear 604 is meshed with the driving bevel gear 607, thereby driving the driving bevel gear 607 and the driven bevel gear 608 to rotate, because the upper driven gear 605 and the lower driven gear 606 are meshed with the driven bevel gear 608, and then the driven bevel gear 608 drives the upper driven gear 605 and the lower driven gear 606 to rotate, and The upper driven gear 605 and the lower driven gear 606 rotate in opposite directions, so the upper sleeve 601 and the lower sleeve 602 connected to the upper driven gear 605 and the lower driven gear 606 respectively rotate relative to each other, and the rotary drilling blades 603 arranged on the upper sleeve 601 and the lower sleeve 602 rotate relative to each other. The cement mixing pile drill bit with bidirectional rotating mixing blades provided in the embodiment of the utility model only needs to rotate the inner drill rod 4 to realize the relative rotation of the upper and lower pairs of rotary drilling blades 603, which is beneficial to improving the uniformity of mixing the foundation soil and cement slurry and improving the quality of the pile. Then start the rotating motor 202, which drives the gear 203 to move on the rack 102. The gear 203 cooperates with the rack 102 to realize the up and down displacement of the lifting mechanism 2, thereby controlling the up and down movement of the drill bit 5 and the bidirectional stirring blade assembly 6 arranged at the lower end of the lifting mechanism 2. Compared with the prior art, this method can generate a greater downward pressure on the inner drill rod 4 and the drill bit 5, enabling the drill bit 5 and the rotary drilling blade 603 to effectively drill holes, thereby improving work efficiency and increasing the practicality of the device.

[0026] The contents not described in detail in this specification belong to the prior art known to those skilled in the art. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A uniaxial bidirectional cement mixing pile, characterized by: The invention comprises two symmetrically arranged guide frames (1), a lifting mechanism (2) is arranged between the two guide frames (1), a driving motor (7) is installed on the lifting mechanism, an output end of the driving motor (7) is connected to an inner drill rod (4), the inner drill rod (4) passes through the lifting mechanism (2) and is arranged vertically, a drill bit (5) is arranged at the lower end of the inner drill rod (4), an outer rod (3) is sleeved on the inner drill rod (4), the upper end of the outer rod (3) is fixedly connected to the lifting mechanism (2), and a plurality of groups of bidirectional stirring blade assemblies (6) are arranged on the outer rod (3).

2. The uniaxial bidirectional cement mixing pile according to claim 1, characterized in that: The bidirectional stirring blade assembly (6) comprises a driving gear (604) fixedly sleeved on the inner drill rod (4), the driving gear (604) meshing with a driving bevel gear (607), a connecting shaft (609) fixedly connected to the side of the driving bevel gear (607) away from the central axis of the inner drill rod (4), the other end of the connecting shaft (609) passing through the outer rod (3) and fixedly connected to the driven bevel gear (608), the driven bevel gear (608) The upper and lower ends are respectively engaged with the upper driven gear (605) and the lower driven gear (606), and the upper driven gear (605) and the lower driven gear (606) are respectively fixedly connected in the upper sleeve (601) and the lower sleeve (602). The upper sleeve (601) and the lower sleeve (602) are both rotatably sleeved on the outer sleeve (3), and the outer side walls of the upper sleeve (601) and the lower sleeve (602) are fixedly connected with rotary blades (603).

3. The uniaxial bidirectional cement mixing pile according to claim 1, characterized in that: The cross section of the guide frame (1) is U-shaped, the grooves of the two guide frames (1) are opposite to each other, a rack (102) is fixedly connected in the groove of the guide frame (1) along the length direction, and a sliding groove (101) is opened on the two side walls of the guide frame (1) along the length direction.

4. The uniaxial bidirectional cement mixing pile according to claim 3, characterized in that: The lifting mechanism (2) comprises a lifting plate (201) installed between the two guide frames (1), a rotating shaft (204) rotatably connected to the left and right ends of the guide frames (1), both ends of the rotating shaft (204) pass through the slide groove (101) and can slide up and down in the slide groove (101), one end of the rotating shaft (204) is connected to the output end of the rotating motor (202), and a gear (203) is fixedly sleeved in the middle of the rotating shaft (204), and the gear (203) is meshed with the rack (102).

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