Hydraulic pile cutting steel drill module and use method thereof

Abstract

The application discloses a hydraulic pile cutting steel drill module and a use method thereof, and belongs to the technical field of underground pile foundations. The hydraulic pile cutting steel drill module comprises a steel drill, a guide base, a hydraulic telescopic device, a movable seat and a one-way moving device; a plurality of annular wedge-shaped tooth grooves are arranged on the steel drill, and the steel drill is arranged in a guide hole of the guide base; the one-way moving device comprises a plurality of first limiting valves and second limiting valves, and the one-way moving device can prevent the steel drill from moving backward; one hydraulic telescopic device is symmetrically arranged on both sides of a cylindrical main body. The hydraulic telescopic device can drive the movable seat to move forward and backward through telescoping, so that the steel drill moves forward gradually. The hydraulic telescopic device is arranged side by side with the steel drill, so that the length of the hydraulic pile cutting steel drill module can be reduced; the hydraulic telescopic device only moves a short distance each time, and a short-stroke and low-power hydraulic telescopic device can be selected. The hydraulic pile cutting steel drill module can adapt to a narrow construction environment, and the short-stroke and low-power hydraulic telescopic device can also reduce equipment cost.

Description

Technical Field

[0001] This invention relates to a hydraulic pile cutting steel rod module and its usage method, belonging to the field of underground pile foundation technology. Background Technology

[0002] Cast-in-place concrete piles are a common type of pile foundation, widely used in various building and infrastructure projects. During construction, cast-in-place concrete piles are often over-poured to a certain height. Before connection with the superstructure, the over-poured portion is cut off to ensure the quality of the connection between the pile foundation and the superstructure. The over-poured portion is called the pile head. Traditional pile head removal methods typically involve manually chiseling or cutting off the pile head using tools such as pneumatic picks, followed by hoisting it away with a crane. This method has many drawbacks, including high labor and machinery costs, significant construction safety risks, and low levels of mechanization.

[0003] Currently, some companies have developed simple hydraulic pile-cutting devices. These devices consist of several hydraulic cylinders arranged in a ring, with a steel chisel at the end of each cylinder pointing towards the center of the ring. The hydraulic cylinders extend and retract the chisel to cut the pile. However, when the hydraulic cylinders and the cutting chisel are arranged on the same line, the hydraulic pile-cutting device becomes too large. For example, if the pile diameter is 1m, the diameter of the hydraulic pile-cutting device needs to be over 3m. In construction sites with small pile spacing, this can prevent the hydraulic pile-cutting device from being used. Summary of the Invention

[0004] To address the problem of existing hydraulic cylinders and pile-cutting steel rods being arranged on the same line, this invention provides a hydraulic pile-cutting steel rod module and its usage method. By arranging the hydraulic cylinders and pile-cutting steel rods side by side, the size of the hydraulic pile-cutting steel rod module is greatly reduced, thus making it suitable for construction environments with narrow pile spacing.

[0005] To solve the above technical problems, the present invention includes the following technical solutions:

[0006] A hydraulic pile cutting steel chisel module includes a steel chisel, a guide base, a hydraulic telescopic device, a movable seat, and a one-way moving device;

[0007] The steel rod is a cylinder with a pointed end, and several annular wedge-shaped grooves are provided on the cylinder.

[0008] The guide base includes a cylindrical body with a guide hole arranged axially inside the cylindrical body. A steel rod is placed in the guide hole, with the tip of the steel rod located at the front end of the cylindrical body and the tail of the steel rod extending out of the rear end of the cylindrical body. A hollow part is provided on the cylindrical body, and a first hinge fulcrum is provided on each side of the front end of the cylindrical body.

[0009] The movable seat is located at the tail of the guide base, with a through hole in the middle and sleeved on the tail of the steel rod. The movable seat is symmetrically provided with second hinge points.

[0010] The one-way moving device includes several first limit valves and second limit valves. The first limit valves are set on the movable base, and the second limit valves are set in the hollow part of the cylindrical body. Both the first limit valves and the second limit valves are connected to the groove of the steel rod with a snap-fit, which can prevent the steel rod from moving backward.

[0011] The cylindrical body is symmetrically equipped with hydraulic telescopic devices on both sides. The two ends of the hydraulic telescopic devices are respectively hinged to the first hinge fulcrum and the second hinge fulcrum. The extension and retraction of the hydraulic telescopic devices can drive the movable seat to move back and forth. When the movable seat moves forward, the first limit valve locks the groove of the steel rod and pushes the steel rod forward. When the movable seat moves backward, the second limit valve locks the groove of the steel rod and keeps the steel rod stationary.

[0012] Furthermore, both the first limit valve and the second limit valve include a pin, a limit plate, and a torsion spring. One end of the limit plate is sleeved on the pin, and the torsion spring is set on the pin. The pin of the first limit valve is set on the movable seat, and the pin of the second limit valve is set on the cylindrical body. The torsion spring causes the end of the limit plate to press against the steel rod and abut against the annular wedge-shaped groove.

[0013] Furthermore, the annular wedge-shaped tooth grooves are evenly spaced along the circumference of the cylinder, and the groove cross-section is a right-angled triangle, with the side closer to the tip being the groove slope and the side farther from the tip being the groove end face.

[0014] Furthermore, the bottom ends of the guide base are respectively provided with a first connecting sleeve and a second connecting sleeve, the first connecting sleeve and the second connecting sleeve are perpendicular to the cylindrical body, and both the first connecting sleeve and the second connecting sleeve are provided with internal threads;

[0015] The hydraulic pile cutting steel rod module also includes a splicing and fixing device, which includes two first hinge joint screw rods and two second hinge joint screw rods. The first hinge joint screw rod includes a first threaded rod and a first connecting ring disposed at one end of the first threaded rod. The first threaded rods of the two first hinge joint screw rods are respectively threaded to both ends of the first connecting sleeve. The second hinge joint screw rod includes a second threaded rod and a second connecting ring disposed at one end of the second threaded rod. The second threaded rods of the two second hinge joint screw rods are respectively threaded to both ends of the second connecting sleeve.

[0016] Accordingly, the present invention also provides a method for using the aforementioned hydraulic pile cutting steel rod module, comprising the following steps:

[0017] Step 1: In the initial state, the hydraulic telescopic device is in the retracted state, and the first limit valve and the second limit valve limit the steel chisel groove in one direction.

[0018] Step 2: Extend the hydraulic telescopic device. The movable seat drives the first limit valve to move backward by M tooth spacings, while the second limit valve keeps the steel rod in place. The position of the steel rod remains unchanged. M is a preset value, M≥1.

[0019] Step 3: The hydraulic telescopic device retracts, and the movable seat moves the first limit valve forward and pushes the steel rod forward synchronously by M tooth spacings.

[0020] Step 4: Repeat steps 2 and 3 to move the steel rod forward gradually.

[0021] Compared with existing technologies, this invention, by adopting the above technical solutions, has the following advantages and positive effects: The hydraulic pile-cutting steel rod module provided by this invention has a hydraulic telescopic device arranged side-by-side with the steel rod, which reduces the length of the hydraulic pile-cutting steel rod module. Furthermore, the extension and retraction of the hydraulic telescopic device can drive the movable seat to move back and forth. Through multiple extension and retraction operations of the hydraulic telescopic device, the steel rod is moved forward into position in multiple stages. Each time, the hydraulic telescopic device moves only a short distance, thus allowing the selection of a short-stroke, low-power hydraulic telescopic device. In addition, the placement of one hydraulic telescopic device on each of the left and right sides of the guide base reduces the force borne by each hydraulic telescopic device. Therefore, the hydraulic pile-cutting steel rod module provided in this embodiment has a shorter length, making it suitable for construction sites with small pile spacing. Moreover, the selection of a short-stroke, low-power hydraulic telescopic device reduces equipment costs. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the hydraulic pile cutting steel rod module in one embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of a steel rod in one embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of the limiting guide base and the second limiting valve in one embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the structure of the movable seat and the first limiting valve in one embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the structure of a hydraulic telescopic device according to an embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of the structure of the first hinge joint screw and the second hinge joint screw in one embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of a hydraulic pile cutting device composed of eight hydraulic pile cutting steel rod modules in one embodiment of the present invention.

[0029] The numbers in the diagram are as follows:

[0030] 1-Hydraulic pile cutting steel rod module;

[0031] 10-Steel chisel; 11-Tip; 12-Glandular groove;

[0032] 20-Guide base; 21-Cylindrical body; 22-Guide hole; 23-First hinge point; 24-; 25-;

[0033] 30 - Hydraulic telescopic device; 31 - Hydraulic cylinder; 32 - Telescopic rod;

[0034] 40 - Movable seat; 41 - Second hinge point;

[0035] 50 - One-way moving device; 51 - First limit valve; 52 - Second limit valve;

[0036] 60 - Splicing and fixing device; 61 - First hinge joint screw; 62 - Second hinge joint screw. Detailed Implementation

[0037] The hydraulic pile cutting steel rod module and its usage method provided by the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer from the following description. It should be noted that the accompanying drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0038] Example 1

[0039] like Figure 1 As shown, the hydraulic pile cutting steel rod module provided in this embodiment includes a steel rod 10, a guide base 20, a hydraulic telescopic device 30, a movable seat 40, and a one-way moving device 50.

[0040] Combination Figure 1 and Figure 2 As shown, the steel rod 10 is a cylinder with a pointed tip 11 at one end. The pointed tip 11 is used to compress the pile body. Several annular wedge-shaped grooves 12 are provided on the cylinder. For example, the pointed tip of the steel rod 10 is conical, and the cylinder is a long cylinder, such as a cylinder with a length of 50cm and a diameter of 5cm. The annular wedge-shaped grooves 12 are evenly spaced along the circumference of the cylinder. The groove cross-section is a right-angled triangle, with the side closer to the pointed tip being the groove slope and the side farther from the pointed tip being the groove end face. For example, the groove depth is 10mm, the groove length is 20mm, and the groove spacing is 35mm.

[0041] Combination Figures 1 to 3As shown, the guide base 20 includes a cylindrical body 21. A guide hole 22 is axially arranged inside the cylindrical body 21. The steel rod 10 is disposed in the guide hole 22 of the limiting guide base 20 and cooperates with the unidirectional moving device 50 to achieve unidirectional movement along the guide hole 22. The tip of the steel rod 10 is located at the front end of the cylindrical body 21, and the tail of the steel rod 10 extends beyond the rear end of the cylindrical body 21. The guide hole 22 of the cylindrical body 21 is mainly used to place the steel rod 10 and guide it. For example, the guide hole 22 is slightly larger than the outer diameter of the steel rod 10, for example, about 1 mm. The steel rod 10 is disposed in the guide hole 22, and the cylindrical body 21 can be hollowed out. A first hinge point 23 is provided on each side of the front end of the cylindrical body 21. The first hinge point 23 is used to hinge with one end of the hydraulic telescopic device 30.

[0042] Combination Figures 1 to 4 As shown, the movable seat 40 is a circular ring plate with a through hole in the middle for mounting on a steel rod. Symmetrically arranged on the movable seat 40 are second hinge points 41 for hinged connection to the end of the hydraulic telescopic device 30.

[0043] Combination Figure 1 and Figure 5 As shown, the two ends of the hydraulic telescopic device 30 are hinged to the first hinge point 23 and the second hinge point 41, respectively. The hydraulic telescopic device 30 typically includes a hydraulic cylinder 31 and a telescopic rod 32, allowing remote control of the extension and retraction of the telescopic rod 32. The hydraulic telescopic device 30 can utilize existing technology, which will not be elaborated upon here. Regarding the hinge method, it can be achieved by setting connecting lugs with pin holes for pin connection; other hinge methods can also be used. For example, the retracted length of the hydraulic telescopic device 30 is 15cm, with a maximum stroke of 8cm, and each stroke allows the steel rod to move 1 or 2 tooth grooves.

[0044] Combination Figures 1 to 4 As shown, the unidirectional movement device 50 includes three first limit valves 51 and three second limit valves 52 arranged around the steel rod 10. Both the first limit valves 51 and the second limit valves 52 unidirectionally limit the steel rod 10, preventing it from moving backward while allowing it to move forward. For example, the first limit valves 51 are mounted on the movable seat 50, and the second limit valves 52 are mounted on the cylindrical body 21. The first and second limit valves 51 and 52 are structurally identical, each including a pin, a limiting plate, and a torsion spring. The limiting plate is fan-shaped and is hinged to the movable seat or the cylindrical body 21 via the pin, allowing it to rotate around the pin. The torsion spring is mounted on the pin and applies a force to the limiting plate, causing the end of the limiting plate to press against the steel rod 10 and abut against the annular wedge-shaped groove 12. The cylindrical body 21 is hollowed out, and the second limit valve 52 is located in the hollowed-out part of the cylindrical body 21. Setting the second limit valve 52 to have the same structure as the first limit valve 51 can reduce the number of standard parts.

[0045] The working principle of the hydraulic pile cutting steel rod module 1 provided in this embodiment is as follows: Initially, the hydraulic telescopic device 30 is in a retracted state, and both the first limit valve 51 and the second limit valve 52 are engaged with the steel rod grooves. When the hydraulic telescopic device 30 extends, the movable seat drives the first limit valve 51 to move backward by a certain groove distance, and the second limit valve limits the steel rod. When the hydraulic telescopic device 30 retracts, the movable seat drives the first limit valve 51 to move forward by a certain groove distance, and pushes the steel rod forward synchronously. The second limit valve does not obstruct the forward movement of the steel rod. Through multiple extension and retraction operations of the hydraulic telescopic device, the steel rod is moved forward into position in multiple stages.

[0046] The hydraulic pile-cutting steel rod module 1 provided in this embodiment has a hydraulic telescopic device 30 arranged side by side with the steel rod 10, which can reduce the length of the hydraulic pile-cutting steel rod module. Moreover, the hydraulic telescopic device moves the steel rod forward in multiple extensions and retractions, with each extension and retraction covering only a short distance. Therefore, a short-stroke hydraulic telescopic device can be selected, further reducing the length of the hydraulic pile-cutting steel rod module. In addition, the presence of one hydraulic telescopic device 30 on each side of the guide base 20 reduces the force borne by each hydraulic telescopic device, allowing for the selection of a low-power hydraulic telescopic device. Therefore, the hydraulic pile-cutting steel rod module provided in this embodiment has a shorter length, making it suitable for construction sites with small pile spacing. Furthermore, the use of short-stroke, low-power hydraulic telescopic devices can reduce equipment costs.

[0047] Combination Figure 1 , Figure 3 and Figure 6 As shown, the bottom ends of the guide base 20 are respectively provided with a first connecting sleeve and a second connecting sleeve. The first connecting sleeve and the second connecting sleeve are perpendicular to the cylindrical body 21, and both the first connecting sleeve and the second connecting sleeve are provided with internal threads. The hydraulic pile cutting steel rod module 1 also includes a splicing and fixing device 60, which includes two first hinge joint screw rods 61 and two second hinge joint screw rods 62. The first hinge joint screw rod 61 includes a first threaded rod and a first connecting ring provided at one end of the first threaded rod. The first threaded rods of the two first hinge joint screw rods 61 are respectively threaded to both ends of the first connecting sleeve. The second hinge joint screw rod 62 includes a second threaded rod and a second connecting ring provided at one end of the second threaded rod. The second threaded rods of the two second hinge joint screw rods 62 are respectively threaded to both ends of the second connecting sleeve.

[0048] Figure 7The diagram illustrates the assembly of eight hydraulic pile-cutting steel rod modules 1 together to form a hydraulic pile-cutting device. Adjacent hydraulic pile-cutting steel rod modules 1 are connected and fixed via a first hinged joint screw 61 and a second hinged joint screw 62, improving assembly efficiency. The first connecting ring of adjacent hydraulic pile-cutting steel rod modules 1 is fixed by a pin, and the second connecting ring is also fixed by a pin. The insertion lengths of the first and second threaded rods are adjustable, facilitating the assembly and fixing of all hydraulic pile-cutting steel rod modules 1 to preset dimensions and improving the installation accuracy of the equipment.

[0049] Example 2

[0050] This embodiment provides a method for using the hydraulic pile cutting steel rod module as described in Embodiment 1. The following is a description of its usage... Figures 1 to 7 The method of use is further described below. The method of use includes the following steps:

[0051] Step 1: In the initial state, the hydraulic telescopic device is in the retracted state, and the first limit valve 51 and the second limit valve 52 unidirectionally limit the tooth groove 12 of the steel rod 10.

[0052] Step 2: The hydraulic telescopic device 30 extends, and the movable seat drives the first limit valve 51 to move backward by M tooth spacings. The second limit valve keeps the steel rod in place and the position of the steel rod remains unchanged. M is a preset value, M≥1.

[0053] Step 3: The hydraulic telescopic device 30 retracts, the movable seat drives the first limit valve 51 to move forward and pushes the steel rod 10 forward synchronously by M tooth spacings, and the second limit valve does not obstruct the forward movement of the steel rod;

[0054] Step 4: Repeat steps 2 and 3 to move the steel rod 10 forward step by step.

[0055] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A hydraulic pile cutting steel drill module, characterized in that, The steel drill, the guide base, the hydraulic telescopic device, the movable seat and the one-way moving device are included. The steel drill is a cylinder with a pointed end, and a plurality of annular wedge-shaped grooves are arranged on the cylinder. The guide base includes a cylindrical body, a guide hole is arranged in the cylindrical body in the axial direction, the steel drill is arranged in the guide hole, the pointed end of the steel drill is located at the front end of the cylindrical body, and the tail of the steel drill extends out of the rear end of the cylindrical body; a hollow part is arranged on the cylindrical body, and a first hinged support is arranged on each side of the front end of the cylindrical body. The movable seat is arranged at the tail of the guide base, a through hole is arranged in the middle of the movable seat, and the movable seat is sleeved on the tail of the steel drill; the second hinged support is symmetrically arranged on the movable seat. The one-way moving device includes a plurality of first limiting valves and second limiting valves; the first limiting valve is arranged on the movable base, the second limiting valve is arranged in the hollow part of the cylindrical body, the first limiting valve and the second limiting valve are connected with the steel drill groove buckle, and the steel drill is prevented from moving backward. The hydraulic telescopic devices are symmetrically arranged on both sides of the cylindrical body, and the two ends of the hydraulic telescopic devices are hinged with the first hinged support and the second hinged support respectively; the hydraulic telescopic devices can drive the movable seat to move forward and backward; when the movable seat moves forward, the first limiting valve clamps the steel drill groove and pushes the steel drill to move forward; when the movable seat moves backward, the second limiting valve clamps the steel drill groove and keeps the steel drill stationary.

2. The hydraulic cutting steel drill module according to claim 1, wherein The first limiting valve and the second limiting valve each include a pin shaft, a limiting plate and a torsional spring; the limiting plate is sleeved on one end of the pin shaft, and the torsional spring is arranged on the pin shaft; the pin shaft of the first limiting valve is arranged on the movable seat, the pin shaft of the second limiting valve is arranged on the cylindrical body, and the torsional spring presses the end of the limiting plate against the annular wedge-shaped groove and the steel drill.

3. The hydraulic cutting steel drill module according to claim 1 or 2, wherein The annular wedge-shaped grooves are equidistantly arranged along the circumference of the cylinder, and the cross section of the groove is a right-angled triangle; one side close to the pointed end is a groove slope, and the other side away from the pointed end is a groove end face.

4. The hydraulic cutting steel drill module according to claim 1 or 2, wherein First and second connecting sleeves are arranged at the two ends of the bottom of the guide base respectively, the first and second connecting sleeves are perpendicular to the cylindrical body, and the first and second connecting sleeves are provided with internal threads; The hydraulic cutting steel drill module further includes a splicing fixing device, the splicing fixing device includes two first hinged head lead screws and two second hinged head lead screws; the first hinged head lead screw includes a first threaded rod and a first connecting ring arranged at one end of the first threaded rod, and the first threaded rods of the two first hinged head lead screws are respectively threadedly connected with the two ends of the first connecting sleeve; the second hinged head lead screw includes a second threaded rod and a second connecting ring arranged at one end of the second threaded rod, and the second threaded rods of the two second hinged head lead screws are respectively threadedly connected with the two ends of the second connecting sleeve.

5. A method of using a hydraulic chipping steel bit module as claimed in any one of claims 1 to 4, characterized in that, The steps include: Step one, in the initial state, the hydraulic telescopic device is in the contracted state, and the first limiting valve and the second limiting valve limit the steel drill groove in one direction. Step two, the hydraulic telescopic device is extended, the movable seat drives the first limiting valve to move back M alveolar space, the second limiting valve keeps limiting the steel drill, the position of the steel drill is unchanged, wherein M is a preset value, M>1; Step three, the hydraulic telescopic device is retracted, the movable seat drives the first limiting valve to move forward and pushes the steel drill to move forward M alveolar space synchronously; Step four, steps two and three are repeated to realize the step-by-step forward movement of the steel drill.

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