Hydraulic pile cutting steel chisel module and using method thereof

Abstract

The invention discloses a hydraulic pile cutting steel chisel module and a using method thereof, and belongs to the technical field of underground pile foundations. The hydraulic pile cutting steel chisel module comprises a steel chisel, 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 formed in the steel chisel, and the steel chisel is arranged in the guide hole of the guide base; the one-way moving device comprises a plurality of first limiting valves and second limiting valves and can prevent the steel chisel from moving backwards; hydraulic telescopic devices are symmetrically arranged on the two sides of the cylindrical body. The hydraulic telescopic device can drive the movable seat to move back and forth, so that the steel chisel moves forwards step by step. The hydraulic telescopic device and the steel chisel are arranged side by side, so that the length of the hydraulic pile cutting steel chisel module can be reduced; the hydraulic telescopic device only moves for a short distance each time, and a short-stroke and low-power hydraulic telescopic device can be selected. The hydraulic pile cutting steel chisel module can adapt to the construction environment of a narrow space, and the equipment cost can be reduced through the short-stroke and low-power hydraulic telescopic device.

Description

Technical Field

[0001] The invention relates to a hydraulic pile cutting steel drill module and a use method thereof, belonging to the technical field of underground pile foundations. Background Art

[0002] Concrete cast-in-place piles are a common type of pile foundation, widely used in various construction and infrastructure projects. During the construction of concrete cast-in-place piles, a certain height is often overfilled, and the overfilled part is cut before connecting to the superstructure to ensure the connection quality between the pile foundation and the superstructure. The overfilled part is called the pile head. The traditional pile head processing process usually uses tools such as pneumatic picks to chisel or cut off the pile head manually, and then lift it away with a crane. This has many disadvantages, such as high man-machine investment costs, high construction safety risks, and low mechanization levels.

[0003] At present, some companies have developed simple hydraulic pile cutting devices on the market, which are equipped with several hydraulic devices arranged in a ring. The ends of the hydraulic devices are equipped with steel chisels pointing to the center point of the ring. The hydraulic devices drive the steel chisels to extend and retract to cut the pile. However, when the hydraulic cylinder and the pile cutting chisel are arranged on the same line, the size of the hydraulic pile cutting device will be too large. For example, if the diameter of the pile is 1m, the diameter of the hydraulic pile cutting device must be more than 3m. In construction sites with small pile spacing, the hydraulic pile cutting device cannot be put into operation. Summary of the invention

[0004] In view of the problem that the existing hydraulic cylinder and pile-cutting steel chisel are arranged front and back on the same line, the present invention provides a hydraulic pile-cutting steel chisel module and a method of using the same, by arranging the hydraulic cylinder and the pile-cutting steel chisel side by side, which greatly reduces the size of the hydraulic pile-cutting steel chisel module, thereby being able to adapt to the construction environment of narrow pile spacing.

[0005] In order to solve the above technical problems, the present invention includes the following technical solutions:

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

[0007] The steel chisel is a cylinder with a pointed tip at one end, and a plurality of annular wedge-shaped tooth sockets are arranged on the cylinder;

[0008] The guide base comprises a cylindrical body, a guide hole is arranged in the cylindrical body along the axial direction, a steel drill is arranged in the guide hole, the tip 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 hinge fulcrum is arranged on both sides of the front end of the cylindrical body;

[0009] The movable seat is arranged at the tail of the guide base, a through hole is arranged in the middle and sleeved on the tail of the steel drill, and a second hinge fulcrum is symmetrically arranged on the movable seat;

[0010] The one-way moving device includes a plurality of first limit valves and second limit valves, wherein the first limit valves are arranged on the movable base, and the second limit valves are arranged on the hollow part of the cylindrical body, and the first limit valves and the second limit valves are both connected with the steel drill tooth groove buckle to prevent the steel drill from moving backward;

[0011] Hydraulic telescopic devices are symmetrically arranged on both sides of the cylindrical body, and the two ends of the hydraulic telescopic devices are respectively hinged to the first hinge fulcrum and the second hinge fulcrum; the hydraulic telescopic device can drive the movable seat to move forward and backward by telescoping; when the movable seat moves forward, the first limit valve clamps the steel drill groove and pushes the steel drill to move forward, and when the movable seat moves backward, the second limit valve clamps the steel drill groove and keeps the steel drill stationary.

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

[0013] Furthermore, the annular wedge-shaped tooth sockets are arranged at equal intervals along the circumference of the cylinder, and the cross section of the socket is a right triangle, the side close to the tip is the socket slope surface, and the side away from the tip is the socket end surface.

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

[0015] The hydraulic pile cutting steel drill module also includes a splicing and fixing device, which includes two first articulated screw rods and two second articulated screw rods; the first articulated screw rod 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 articulated screw rods are respectively threadedly connected to the two ends of the first connecting sleeve; the second articulated screw rod 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 articulated screw rods are respectively threadedly connected to the two ends of the second connecting sleeve.

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

[0017] Step 1: In the initial state, the hydraulic expansion and contraction device is in a contracted state, and the first limit valve and the second limit valve limit the steel drill tooth groove in one direction;

[0018] Step 2: The hydraulic telescopic device is extended, and the movable seat drives the first limit valve to move backward by M tooth socket spacings, and the second limit valve keeps limiting the steel drill, and the position of the steel drill remains unchanged, where M is a preset value, M≥1;

[0019] Step 3: The hydraulic expansion and contraction device is operated, and the movable seat drives the first limit valve to move forward and pushes the steel drill to move forward synchronously by M tooth socket spacings;

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

[0021] Due to the adoption of the above technical scheme, the present invention has the following advantages and positive effects compared with the prior art: the hydraulic pile cutting steel drill module provided by the present invention has a hydraulic telescopic device and a steel drill arranged side by side, which can reduce the length of the hydraulic pile cutting steel drill module; moreover, the telescopic device can drive the movable seat to move forward and backward, and the steel drill can be moved forward to its position in multiple times through multiple extension and contraction operations of the hydraulic telescopic device. The hydraulic telescopic device only moves a short distance each time, so a short-stroke, low-power hydraulic telescopic device can be selected; in addition, a hydraulic telescopic device is arranged on each of the left and right sides of the guide base, which can reduce the force borne by each hydraulic telescopic device. Therefore, the hydraulic pile cutting steel drill module provided by this embodiment has a smaller length, can adapt to construction sites with smaller pile spacing, and can reduce equipment costs by selecting a short-stroke, low-power hydraulic telescopic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a hydraulic pile cutting steel drill module in one embodiment of the present invention;

[0023] Figure 2 It is a structural schematic diagram of a steel drill in one embodiment of the present invention;

[0024] Figure 3 It is a schematic structural diagram of a limit guide base and a second limit valve in one embodiment of the present invention;

[0025] Figure 4 It is a structural schematic diagram of a movable seat and a first limit valve in one embodiment of the present invention;

[0026] Figure 5 It is a structural schematic diagram of a hydraulic telescopic device in one embodiment of the present invention;

[0027] Figure 6 It is a schematic structural diagram of a first articulated joint screw rod and a second articulated joint screw rod in one embodiment of the present invention;

[0028] Figure 7 It is a schematic diagram of eight hydraulic pile cutting steel drill modules spliced ​​together to form a hydraulic pile cutting device in one embodiment of the present invention.

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

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

[0031] 10-steel chisel; 11-tip; 12-tooth socket;

[0032] 20-guide base; 21-cylindrical body; 22-guide hole; 23-first hinge fulcrum; 24-; 25-;

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

[0034] 40-movable seat; 41-second hinge fulcrum;

[0035] 50-one-way moving device; 51-first limit valve; 52-second limit valve;

[0036] 60 - splicing and fixing device; 61 - first articulated screw rod; 62 - second articulated screw rod. DETAILED DESCRIPTION

[0037] The hydraulic pile cutting steel drill module and the method of using the hydraulic pile cutting steel drill module provided by the present invention are further described in detail below in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer in conjunction with the following description. It should be noted that the accompanying drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0038] Embodiment 1

[0039] like Figure 1 As shown, the hydraulic pile cutting steel drill module provided in this embodiment includes a steel drill 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 drill 10 is a cylinder with a tip 11 at one end, the tip 11 is used to squeeze the pile body, and a plurality of annular wedge-shaped tooth sockets 12 are arranged on the cylinder. As an example, the tip of the steel drill 10 is a cone, and the cylinder is a long cylinder, such as a cylinder with a length of 50 cm and a diameter of 5 cm. The annular wedge-shaped tooth sockets 12 are arranged at equal intervals along the circumference of the cylinder, and the groove section is a right triangle, the side close to the tip is the groove slope surface, and the side away from the tip is the groove end surface, such as a groove depth of 10 mm, a groove length of 20 mm, and a groove distance of 35 mm.

[0041] Combination Figures 1 to 3As shown, the guide base 20 includes a cylindrical body 21, and a guide hole 22 is axially arranged in the cylindrical body 21. The steel drill 10 is arranged in the guide hole 22 of the limiting guide base 20, and cooperates with the unidirectional moving device 50 to realize unidirectional movement along the guide hole 22. The tip of the steel drill 10 is located at the front end of the cylindrical body 21, and the tail of the steel drill 10 extends out of the rear end of the cylindrical body 21. The guide hole 22 of the cylindrical body 21 is mainly used to place the steel drill 10 and guide the steel drill 10. As an example, the guide hole 22 is slightly larger than the outer diameter of the steel drill 10, such as about 1mm. The steel drill 10 is arranged in the guide hole 22, and the cylindrical body 21 can be hollowed out. A first hinge fulcrum 23 is arranged on both sides of the front end of the cylindrical body 21, and the first hinge fulcrum 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, and the through hole in the middle is used to be sleeved on the steel chisel. The movable seat 40 is symmetrically provided with a second hinge fulcrum 41 for hinged connection with 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 respectively hinged to the first hinge fulcrum 23 and the second hinge fulcrum 41. The hydraulic telescopic device 30 generally includes a hydraulic cylinder 31 and a telescopic rod 32, and the extension and contraction of the telescopic rod 32 can be remotely controlled. The hydraulic telescopic device 30 can adopt existing technology, which will not be described here. As for the hinge method, it can be connected by setting a connecting ear plate, setting a pin hole on the ear plate, and connecting through a pin shaft. Other hinge methods can also be used. For example, the length of the hydraulic telescopic device 30 in the retracted state is 15 cm, and the maximum stroke is 8 cm. Each stroke can move the steel drill 1 or 2 tooth groove distances.

[0044] Combination Figures 1 to 4 As shown, the one-way moving device 50 includes three first limit valves 51 and three second limit valves 52 arranged around the steel drill. The first limit valve 51 and the second limit valve 52 both limit the steel drill 10 in one direction, that is, prevent the steel drill 10 from moving backward and allow the steel drill 10 to move forward. As an example, the first limit valve 51 is arranged on the movable seat 50, and the second limit valve 52 is arranged on the cylindrical body 21. The first limit valve 51 and the second limit valve 52 are the same in structure, and both include a pin shaft, a limit plate and a torsion spring. The limit plate is fan-shaped and is installed on the movable seat or the cylindrical body 21 through a pin shaft hinge node, and can rotate around the pin shaft. The torsion spring is arranged on the pin shaft, and the limit plate is subjected to a force, and the force causes the end of the limit plate to press the steel drill 10 and press against the annular wedge-shaped tooth groove 12. The cylindrical body 21 is hollowed out, and the second limit valve 52 is arranged in the hollowed out portion of the cylindrical body 21 . The second limit valve 52 is arranged to have the same structure as the first limit valve 51 , so as to reduce the number of standard parts.

[0045] The working principle of the hydraulic pile cutting steel drill module 1 provided in this embodiment is as follows: initially, the hydraulic telescopic device 30 is in a contracted state, and the first limit valve 51 and the second limit valve 52 are both matched with the steel drill tooth groove; the hydraulic telescopic device 30 is extended, and the movable seat drives the first limit valve 51 to move backward by a certain distance of the tooth groove, and the second limit valve limits the steel drill; the hydraulic telescopic device 30 is contracted, and the movable seat drives the first limit valve 51 to move forward by a certain distance of the tooth groove, and pushes the steel drill to move forward synchronously, and the second limit valve does not hinder the steel drill from moving forward. Through multiple extension and contraction operations of the hydraulic telescopic device, the steel drill is moved forward to its position multiple times.

[0046] In the hydraulic pile cutting steel drill module 1 provided in this embodiment, the hydraulic telescopic device 30 is arranged side by side with the steel drill 10, which can reduce the length of the hydraulic pile cutting steel drill module; moreover, the hydraulic telescopic device is telescoped for multiple times to realize the forward movement of the steel drill, and the hydraulic telescopic device only moves a short distance each time, so a short-stroke hydraulic telescopic device can be selected to further reduce the length of the hydraulic pile cutting steel drill module; in addition, a hydraulic telescopic device 30 is arranged on each of the left and right sides of the guide base 20, which can reduce the force borne by each hydraulic telescopic device, so that a low-power hydraulic telescopic device can be selected. Therefore, the hydraulic pile cutting steel drill module provided in this embodiment has a smaller length, can adapt to the construction site with a smaller pile spacing, and the equipment cost can be reduced by selecting a short-stroke, low-power hydraulic telescopic device.

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

[0048] Figure 7A schematic diagram of a hydraulic pile cutting device is shown in which eight hydraulic pile cutting steel drill modules 1 are spliced ​​together. Adjacent hydraulic pile cutting steel drill modules 1 are spliced ​​and fixed by a first hinge screw 61 and a second hinge screw 62, which can improve the efficiency of splicing. The first connecting rings of adjacent hydraulic pile cutting steel drill modules 1 are fixed by a pin, and the second connecting rings are fixed by a pin. The insertion lengths of the first threaded rod and the second threaded rod are adjustable, so that all hydraulic pile cutting steel drill modules 1 can be spliced ​​and fixed according to a preset size, thereby improving the installation accuracy of the equipment.

[0049] Embodiment 2

[0050] This embodiment provides a method for using the hydraulic pile cutting steel drill module as described in the first embodiment. Figures 1 to 7 The method of use is further described. The method of use comprises the following steps:

[0051] Step 1: In the initial state, the hydraulic expansion and contraction device is in a contracted state, and the first limit valve 51 and the second limit valve 52 limit the tooth groove 12 of the steel drill 10 in one direction;

[0052] Step 2: The hydraulic expansion and contraction device 30 is extended, and the movable seat drives the first limit valve 51 to move backward by M tooth socket spacings, and the second limit valve keeps limiting the steel drill, and the position of the steel drill remains unchanged, where M is a preset value, M≥1;

[0053] Step 3: The hydraulic expansion and contraction device 30 is operated, the movable seat drives the first limit valve 51 to move forward and pushes the steel drill 10 to move forward synchronously by M tooth socket spacings, and the second limit valve does not hinder the steel drill from moving forward;

[0054] Step 4: Repeat steps 2 and 3 to gradually move the steel drill 10 forward.

[0055] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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 above-mentioned embodiments only express several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A hydraulic pile cutting steel drill module, characterized in that: It includes a steel drill, a guide base, a hydraulic telescopic device, a movable seat and a one-way moving device; The steel chisel is a cylinder with a pointed tip at one end, and a plurality of annular wedge-shaped tooth sockets are arranged on the cylinder; The guide base comprises a cylindrical body, a guide hole is arranged in the cylindrical body along the axial direction, a steel drill is arranged in the guide hole, the tip 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 hinge fulcrum is arranged on both sides 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 and sleeved on the tail of the steel drill, and a second hinge fulcrum is symmetrically arranged on the movable seat; The one-way moving device includes a plurality of first limit valves and second limit valves, wherein the first limit valves are arranged on the movable base, and the second limit valves are arranged on the hollow part of the cylindrical body, and the first limit valves and the second limit valves are both connected with the steel drill tooth groove buckle to prevent the steel drill from moving backward; Hydraulic telescopic devices are symmetrically arranged on both sides of the cylindrical body, and the two ends of the hydraulic telescopic devices are respectively hinged to the first hinge fulcrum and the second hinge fulcrum; the hydraulic telescopic device can drive the movable seat to move forward and backward by telescoping; when the movable seat moves forward, the first limit valve clamps the steel drill groove and pushes the steel drill to move forward, and when the movable seat moves backward, the second limit valve clamps the steel drill groove and keeps the steel drill stationary.

2. The hydraulic pile cutting steel drill module according to claim 1, characterized in that: The first limit valve and the second limit valve both 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 arranged on the pin. The pin of the first limit valve is arranged on the movable seat, and the pin of the second limit valve is arranged on the cylindrical body. The torsion spring causes the end of the limit plate to press the steel chisel and press against the annular wedge-shaped tooth groove.

3. The hydraulic pile cutting steel drill module according to claim 1 or 2, characterized in that: The annular wedge-shaped tooth sockets are arranged at equal intervals along the circumference of the cylinder, and the cross-section of the socket is a right triangle. The side close to the tip is the socket slope surface, and the side away from the tip is the socket end surface.

4. The hydraulic pile cutting steel drill module according to claim 1 or 2, characterized in that: The first connecting sleeve and the second connecting sleeve are respectively provided at both ends of the bottom of the guide base, the first connecting sleeve and the second connecting sleeve are perpendicular to the cylindrical body, and the first connecting sleeve and the second connecting sleeve are both provided with internal threads; The hydraulic pile cutting steel drill module also includes a splicing and fixing device, which includes two first articulated screw rods and two second articulated screw rods; the first articulated screw rod 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 articulated screw rods are respectively threadedly connected to the two ends of the first connecting sleeve; the second articulated screw rod 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 articulated screw rods are respectively threadedly connected to the two ends of the second connecting sleeve.

5. A method for using the hydraulic pile cutting steel drill module according to any one of claims 1 to 4, characterized in that: The steps include: Step 1: In the initial state, the hydraulic expansion and contraction device is in a contracted state, and the first limit valve and the second limit valve limit the steel drill tooth groove in one direction; Step 2: The hydraulic telescopic device is extended, and the movable seat drives the first limit valve to move backward by M tooth socket spacings, and the second limit valve keeps limiting the steel drill, and the position of the steel drill remains unchanged, where M is a preset value, M≥1; Step 3: The hydraulic expansion and contraction device is operated, and the movable seat drives the first limit valve to move forward and pushes the steel drill to move forward synchronously by M tooth socket spacings; Step 4: Repeat steps 2 and 3 to gradually move the steel drill forward.

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