Heading machine beneficial to driving piles underground

Abstract

The invention relates to a heading machine beneficial to driving a pile underground, which comprises a frame provided with an upper mounting part and a lower mounting part, and the lower mounting part is provided with a vertical mounting surface and an inclined mounting surface; the hydraulic motor is mounted on the upper mounting part; the first bearing seat is mounted on the vertical mounting surface, and the second bearing seat is mounted on the inclined mounting surface; the vertical transmission shaft is mounted on the first bearing seat and is vertically arranged, the upper end of the vertical transmission shaft is connected with the hydraulic motor, a first milling and digging roller is fixedly arranged on the vertical transmission shaft in a sleeving manner, and a plurality of first milling and digging teeth are arranged on the peripheral wall of the first milling and digging roller; and the inclined transmission shaft is installed on the second bearing seat and arranged in an inclined mode, the upper end of the inclined transmission shaft is connected with the lower end of the vertical transmission shaft, a second milling and digging roller is fixedly arranged on the inclined transmission shaft in a sleeving mode, and a plurality of second milling and digging teeth are arranged on the peripheral wall of the second milling and digging roller. The heading machine can soften a deep-hole-shaped pile planting position which is in the depth direction of a foundation and has a square section.

Description

Technical Field

[0001] The present invention belongs to the technical field of pile foundation construction, and particularly relates to a tunneling machine that facilitates driving piles into the ground. Background Art

[0002] A pile driver consists of a pile hammer, a pile frame, and auxiliary equipment. The pile hammer is attached between two parallel vertical guide rods (commonly known as the gantry) at the front of the pile frame and is lifted by a lifting hook. The pile frame is a steel structure tower, and a winch is provided at its rear for lifting the pile and the pile hammer. There is a guide frame composed of two guide rods in front of the pile frame to control the driving direction of the pile and make the pile accurately penetrate the formation according to the designed orientation. The basic technical parameters of the pile driver are the weight of the impact part, the impact kinetic energy, and the impact frequency. Pile hammers can be classified into drop hammers, steam hammers, diesel hammers, hydraulic hammers, etc. according to the power source of movement.

[0003] A typical pile driver is a vibratory pile hammer type pile driver, which uses high-frequency vibration to vibrate the pile body with high acceleration, transmits the vertical vibration generated by the machine to the pile body, causes the soil structure around the pile to change due to vibration, reduces the strength, liquefies the soil around the pile body, and then sinks the pile into the soil with the downward pressure of the excavator, the vibration sinking and extracting hammer, and the self-weight of the pile body. For example, the Chinese utility model patent "Pile Hammer Manipulating Mechanism of a Vibratory Pile Driver" with the patent number ZL201020573879.6 (publication number CN201817812U) discloses such a device. When in use, it is usually necessary to first use a crane to lift the pile to be driven to the pile gripper position of the pile hammer, and then use the pile gripper to hold the pile tightly to achieve the purpose of driving the pile. Existing pile drivers are only suitable for constructing pipe piles. For existing large-section pile types such as solid square piles and H-shaped piles, it is not easy to drive them into the ground with existing pile drivers. In the later stage of driving the pile, due to the compaction of the soil, there is a phenomenon of pile rebound during the driving process, resulting in serious damage to the pile, and even the pile cannot be driven into the preset position.

[0004] In order to drive piles of large-section pile types such as solid square piles and H-shaped piles, drilling equipment is also used to drill deep holes in the foundation and then drive the piles. However, existing drilling equipment can only drill round deep holes in the foundation, and it is still not suitable for driving piles with a square or H-shaped cross-section.

[0005] Therefore, it is an urgent technical problem for those skilled in the art to develop a device that facilitates driving piles of large-section pile types such as solid square piles, hollow square piles, rectangular piles, and H-shaped piles. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a tunneling machine that is simple and reasonable in structure and can soften a deep-hole-shaped pile driving position with a square cross-section along the depth direction of the foundation and facilitate driving the pile into the ground in view of the above-mentioned current situation of the prior art.

[0007] The technical solution adopted by the present invention to solve the above technical problems is as follows: a tunneling machine that facilitates driving piles into the ground, characterized in that it includes a frame having an upper mounting portion and a lower mounting portion, and the lower mounting portion has a vertical mounting surface and an inclined mounting surface; a hydraulic motor mounted on the upper mounting portion; a first bearing seat and a second bearing seat, the first bearing seat is mounted on the vertical mounting surface, and the second bearing seat is mounted on the inclined mounting surface; a vertical transmission shaft that is vertically arranged by being mounted on the first bearing seat through a first bearing, the upper end of the vertical transmission shaft is connected to the hydraulic motor, the hydraulic motor drives the vertical transmission shaft to rotate around its axis, a first milling drum is sleeved and fixed on the vertical transmission shaft, and a plurality of first milling teeth are provided on the outer peripheral wall of the first milling drum; an inclined transmission shaft that is inclined by being mounted on the second bearing seat through a second bearing, the upper end of the inclined transmission shaft is connected to the lower end of the vertical transmission shaft so that the rotation of the vertical transmission shaft can drive the inclined transmission shaft to rotate around its axis, a second milling drum is sleeved and fixed on the inclined transmission shaft, and a plurality of second milling teeth are provided on the outer peripheral wall of the second milling drum; the included angle between the rotation axis of the vertical transmission shaft and the rotation axis of the inclined transmission shaft is greater than 90 degrees.

[0008] Preferably, the above-mentioned first milling teeth are arranged in multiple rows from top to bottom, and each row includes a plurality of first milling teeth arranged at intervals along the circumference; the second milling teeth are arranged in multiple rows from top to bottom, and each row includes a plurality of second milling teeth arranged at intervals along the circumference. Dividing the milling teeth on each milling drum into multiple rows can improve the efficiency of excavating and stirring soil when the milling drum rotates.

[0009] Further improvement, the upper and lower adjacent rows of the first milling teeth are arranged in a staggered manner, and the upper and lower adjacent rows of the second milling teeth are arranged in a staggered manner. The adjacent rows of milling teeth are arranged in a staggered manner, and the gaps between the lower row of excavation teeth are just filled by the upper row of excavation teeth, so that each position in the circumferential direction can be excavated simultaneously, and the effect of excavating the foundation is better.

[0010] If a single-section milling drum is too long, the single-section second milling drum will be blocked too much and is easily damaged, and the power requirement for the hydraulic motor is higher. In view of this situation, as an improvement, there are multiple second milling drums, which are fixedly arranged at intervals along the axis on the inclined transmission shaft, and a second bearing seat is provided between two adjacent second milling drums. The second milling drum is divided into multiple sections, and the resistance of the lowermost section of the second milling drum is the greatest. After the soil is stirred by the lowermost section of the milling drum, the upper section of the second milling drum enters again, and the resistance received will become smaller. The resistance of the upper section of the second milling drum is smaller and smaller, effectively reducing the overall resistance received by the second milling drum, effectively protecting the second milling drum, and reducing the power requirement of the hydraulic motor.

[0011] As an improvement, the lowermost second milling drum is located below the bottom of the frame.

[0012] When excavating in this way, the second milling and excavating roller located below the bottom of the frame first contacts the ground for excavation. Even if the foundation becomes soft during the excavation process, it is conducive to the frame following and entering under the foundation.

[0013] To facilitate the connection between the vertical transmission shaft and the inclined transmission shaft, an upper flange is fixed to the bottom surface of the vertical transmission shaft. Two first connecting ears extending downward and spaced left and right are provided on the upper flange; a lower flange is fixed to the top surface of the inclined transmission shaft. Two second connecting ears extending upward and spaced front and back are provided on the lower flange; the first connecting ears and the second connecting ears are connected by a cross connecting shaft. The opposite ends of the cross connecting shaft are hinged to the first connecting ears, and the other opposite ends of the cross connecting shaft are hinged to the second connecting ears. The setting of the cross connecting shaft enables the inclined transmission shaft to swing left and right and back and forth relative to the vertical transmission shaft before installation, which is conducive to installing the inclined transmission shaft on the second bearing seat. After installation, the inclined transmission shaft can be supported by the bearing and cannot swing, ensuring that the vertical transmission shaft and the inclined transmission shaft can rotate around their respective axes driven by the hydraulic motor.

[0014] For further improvement, the above-mentioned frame further has a guiding part with a rectangular outer contour. The guiding part has a certain length and is located above the upper mounting part. The setting of the guiding part enables the guiding part to follow the milling and excavating roller and penetrate deep under the foundation, guiding the milling and excavating roller to move vertically deep into the foundation. The uppermost end of the guiding part is always above the foundation, which is convenient for pulling out the head part of the entire roadheader from the foundation. Moreover, according to the position where the guiding part is inserted into the foundation, the overall depth of the roadheader in the foundation can be accurately known, which is conducive to control.

[0015] As an improvement, the front and rear sides of the above-mentioned guiding part are provided with discharge grooves penetrating upward. When the milling and excavating roller rotates to dig holes, the stirred soil can rise along the discharge grooves, so it is conducive to the downward movement of the milling and excavating roller.

[0016] To facilitate the pulling out of the guiding part, the bottom surface of the above-mentioned discharge groove is an inclined surface. The setting of the inclined surface reduces the pulling resistance.

[0017] As a preference, the above-mentioned upper mounting part is an installation hole provided on one side below the guiding part, and the lower mounting part is provided on the other side below the guiding part and extends downward. The side wall of the lower mounting part constitutes the vertical mounting surface and the inclined mounting surface. The installation hole hides the hydraulic motor inside, playing a certain protective role.

[0018] Compared with the prior art, the advantages of the present invention are as follows: The head excavation part of this roadheader consists of a vertical transmission shaft and an inclined transmission shaft located below. During the excavation work, the second milling drum rotates downward around its axis along with the inclined transmission shaft, and the first milling drum rotates downward around its axis along with the vertical transmission shaft. The included angle between the rotation axis of the vertical transmission shaft and the rotation axis of the inclined transmission shaft is greater than 90 degrees. Therefore, during the overall downward movement, the first milling teeth on the rotating first milling drum and the second milling teeth on the second milling drum stir the soil, softening the pile planting position in the shape of a deep hole with a square cross-section along the depth direction of the foundation. After reaching the predetermined depth, the head excavation part is pulled out. Compared with traditional hole-digging equipment, the softened pile planting position is in the shape of a deep hole with a square cross-section, which is conducive to implanting large cross-section pile types such as solid square piles, hollow square piles, rectangular piles, and H-shaped piles into the ground, and it is not easy to damage the pile body during the piling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic three-dimensional structure diagram of an embodiment of the present invention;

[0020] Figure 2 is a sectional view of an embodiment of the present invention;

[0021] Figure 3 is an installation schematic diagram of the vertical transmission shaft and the inclined transmission shaft of an embodiment of the present invention;

[0022] Figure 4 is a schematic three-dimensional diagram of the milling drum in an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The present invention will be further described in detail below with reference to the embodiments of the drawings.

[0024] As Figures 1 to 4 shown, it is a preferred embodiment of the present invention.

[0025] A roadheader that facilitates driving piles into the ground, comprising

[0026] A frame 1, having an upper mounting portion 11 and a lower mounting portion 12, and the lower mounting portion 12 has a vertical mounting surface 1a and an inclined mounting surface 1b. The upper mounting portion 11 is a mounting hole provided on one side below the guiding portion 13, and on the other side below the guiding portion 13, there is a connecting portion 14 extending downward, and the side wall of the connecting portion 14 constitutes the vertical mounting surface 1a and the inclined mounting surface 1b.

[0027] A hydraulic motor 2, mounted on the upper mounting portion 11.

[0028] A first bearing seat 3a and a second bearing seat 3b, the first bearing seat 3a is mounted on the vertical mounting surface 1a, and the second bearing seat 3b is mounted on the inclined mounting surface 1b.

[0029] A vertical transmission shaft 5a is vertically arranged and installed on a first bearing block 3a through a first bearing 4a. The upper end of the vertical transmission shaft 5a is connected to the hydraulic motor 2, and the hydraulic motor drives the vertical transmission shaft 5a to rotate around its axis. A first milling drum 6a is fixed on the vertical transmission shaft 5a. The first milling drum 6a is sleeved in a tubular shape and welded and fixed on the vertical transmission shaft 5a. A plurality of first milling teeth 6a1 are arranged on the outer peripheral wall of the first milling drum 6a. The first milling teeth 6a1 are arranged in multiple rows from top to bottom, and each row includes a plurality of first milling teeth 6a1 arranged at intervals along the circumference. The first milling teeth 6a1 in two adjacent upper and lower rows are arranged in a staggered manner. Of course, multiple first milling drums 6a can also be arranged at intervals up and down.

[0030] An inclined transmission shaft 5b is inclined and installed on a second bearing block 3b through a second bearing 4b. The upper end of the inclined transmission shaft 5b is connected to the lower end of the vertical transmission shaft 5a, so that the rotation of the vertical transmission shaft 5a can drive the inclined transmission shaft 5b to rotate around its axis. A second milling drum 6b is fixed on the inclined transmission shaft 5b. The second milling drum 6b is sleeved in a tubular shape and welded and fixed on the inclined transmission shaft 5b. A plurality of second milling teeth 6b1 are arranged on the outer peripheral wall of the second milling drum 6b. The included angle α between the rotation axis of the vertical transmission shaft 5a and the rotation axis of the inclined transmission shaft 5b is greater than 90 degrees. The second milling teeth 6b1 are arranged in multiple rows from top to bottom, and each row includes a plurality of second milling teeth 6b1 arranged at intervals along the circumference. The second milling teeth 6b1 in two adjacent upper and lower rows are arranged in a staggered manner.

[0031] There are three second milling drums 6b, which are fixed on the inclined transmission shaft 5b at intervals along the axis. A second bearing block 3b is arranged between two adjacent second milling drums 6b. There are two corresponding second bearing blocks 3b, and the lowermost second milling drum 6b is located below the bottom of the frame 1.

[0032] The vertical transmission shaft 5a and the inclined transmission shaft 5b are connected together by the following structure: an upper flange 7a is fixed on the bottom surface of the vertical transmission shaft 5a, and two first connecting lugs 7a1 extending downward and arranged at intervals left and right are arranged on the upper flange 7a; a lower flange 7b is fixed on the top surface of the inclined transmission shaft 5b, and two second connecting lugs 7b1 extending upward and arranged at intervals front and back are arranged on the lower flange 7b; the first connecting lugs 7a1 and the second connecting lugs 7b1 are connected by a cross connecting shaft 8. The opposite ends of the cross connecting shaft 8 are hinged to the first connecting lugs 7a1, and the other opposite ends of the cross connecting shaft 8 are hinged to the second connecting lugs 7b1.

[0033] The frame 1 further has a guiding portion 13 with a rectangular outer contour. The guiding portion 13 has a certain length. The lower mounting portion 12 is provided on the other side below the guiding portion 13 and extends downward. The side wall of the lower mounting portion 12 constitutes the vertical mounting surface 1a and the inclined mounting surface 1b. Exhaust grooves 131 penetrate upward on both the front and rear sides of the guiding portion 13. Drainage openings 132 are formed on the bottom surface of the exhaust grooves 131.

[0034] The head excavation part of this tunneling machine consists of a vertical transmission shaft 5a and an inclined transmission shaft 5b located below. During the excavation work, the downward and upward forces of the whole part of this tunneling machine are provided by the excavating arm of the excavator. The second milling and digging roller 6b rotates and descends around its axis along with the inclined transmission shaft 5b, and the first milling and digging roller 6a rotates and descends around its axis along with the vertical transmission shaft 5a. The included angle α between the rotation axis of the vertical transmission shaft 5a and the rotation axis of the inclined transmission shaft 5b is greater than 90 degrees. Therefore, during the overall downward movement, the first milling and digging teeth 6a1 on the rotating first milling and digging roller 6a and the second milling and digging teeth 6b1 on the second milling and digging roller 6b stir the soil, softening the pile planting position in the shape of a deep hole with a square cross-section along the depth direction of the foundation. After reaching the predetermined depth, the head excavation part is pulled out. Compared with traditional hole-digging equipment, the softened pile planting position is in the shape of a deep hole with a square cross-section, which is beneficial to implanting large-section pile types such as solid square piles, hollow square piles, rectangular piles, and H-shaped piles into the ground, and it is not easy to damage the pile body during the piling process. Water can also be passed during construction, and the mud can be diluted while stirring, which is beneficial to the overall downward movement.

[0035] It should be noted that in the description of this embodiment, the orientation or positional relationship indicated by terms such as "front, rear", "left, right", "inner, outer", "upper, lower", etc. are all based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. The terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

Claims

1. A boring machine for driving piles into the ground, characterized in that: include A frame (1) having an upper mounting portion (11) and a lower mounting portion (12), wherein the lower mounting portion (12) has a vertical mounting surface (1a) and an inclined mounting surface (1b); A hydraulic motor (2) mounted on the upper mounting portion (11); A first bearing seat (3a) and a second bearing seat (3b), wherein the first bearing seat (3a) is mounted on a vertical mounting surface (1a), and the second bearing seat (3b) is mounted on an inclined mounting surface (1b); A vertical transmission shaft (5a) is mounted on the first bearing seat (3a) through a first bearing (4a) and is arranged vertically. The upper end of the vertical transmission shaft (5a) is connected to the hydraulic motor (2). The hydraulic motor drives the vertical transmission shaft (5a) to rotate around its axis. A first milling roller (6a) is sleeved and fixed on the vertical transmission shaft (5a). A plurality of first milling teeth (6a1) are arranged on the outer peripheral wall of the first milling roller (6a); The inclined transmission shaft (5b) is installed on the second bearing seat (3b) through the second bearing (4b) and is arranged in an inclined manner. The upper end of the inclined transmission shaft (5b) is connected to the lower end of the vertical transmission shaft (5a), so that the rotation of the vertical transmission shaft (5a) can drive the inclined transmission shaft (5b) to rotate around its axis. The inclined transmission shaft (5b) is sleeved and fixed with a second milling roller (6b), and the outer peripheral wall of the second milling roller (6b) is provided with a plurality of second milling teeth (6b1); the angle (α) between the rotation axis of the vertical transmission shaft (5a) and the rotation axis of the inclined transmission shaft (5b) is greater than 90 degrees.

2. The tunnel boring machine for driving piles into the ground according to claim 1, characterized in that: The first milling teeth (6a1) are arranged in multiple rows from top to bottom, and each row includes multiple first milling teeth (6a1) arranged at intervals along the circumference; the second milling teeth (6b1) are arranged in multiple rows from top to bottom, and each row includes multiple second milling teeth (6b1) arranged at intervals along the circumference.

3. The boring machine for driving piles into the ground according to claim 2, characterized in that: The first milling and digging teeth (6a1) in two upper and lower adjacent rows are arranged in a staggered manner, and the second milling and digging teeth (6b1) in two upper and lower adjacent rows are arranged in a staggered manner.

4. The boring machine for driving piles into the ground according to claim 1, characterized in that: There are a plurality of second milling rollers (6b), which are fixed on the inclined transmission shaft (5b) at intervals in the upper and lower directions along the axial direction, and a second bearing seat (3b) is provided between two adjacent second milling rollers (6b).

5. The boring machine for driving piles into the ground according to claim 4, characterized in that: The second milling roller (6b) at the lowermost end is located below the bottom of the frame (1).

6. The tunnel boring machine for driving piles into the ground according to claim 1, characterized in that: An upper flange (7a) is fixed to the bottom surface of the vertical transmission shaft (5a), and two first connecting ears (7a1) extending downward and spaced apart from each other are provided on the upper flange (7a); a lower flange (7b) is fixed to the top surface of the inclined transmission shaft (5b), and two second connecting ears (7b1) extending upward and spaced apart from each other are provided on the lower flange (7b); the first connecting ear (7a1) and the second connecting ear (7b1) are connected via a cross connecting shaft (8), and the two opposite ends of the cross connecting shaft (8) are hinged to the first connecting ear (7a1), and the other two opposite ends of the cross connecting shaft (8) are hinged to the second connecting ear (7b1).

7. A boring machine for driving piles into the ground according to any one of claims 1 to 6, characterized in that: The frame (1) also has a guide portion (13) with a rectangular outer contour. The guide portion (13) has a certain length and is located above the upper mounting portion (11).

8. The boring machine for driving piles into the ground according to claim 7, characterized in that: The guide portion (13) has drainage grooves (131) penetrating upwards on both the front and rear sides.

9. The boring machine for driving piles into the ground according to claim 8, characterized in that: The bottom surface of the drainage groove (131) is provided with a drainage opening (132).

10. The tunnel boring machine for driving piles into the ground according to claim 7, characterized in that: The upper mounting portion (11) is a mounting hole provided on one side below the guide portion (13); the lower mounting portion (12) is provided on the other side below the guide portion (13) and extends downward; the side wall of the lower mounting portion (12) constitutes the vertical mounting surface (1a) and the inclined mounting surface (1b).

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