AU2019377666A1 - Hydraulic linear impact vibration pile hammer machine - Google Patents
Hydraulic linear impact vibration pile hammer machine Download PDFInfo
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- AU2019377666A1 AU2019377666A1 AU2019377666A AU2019377666A AU2019377666A1 AU 2019377666 A1 AU2019377666 A1 AU 2019377666A1 AU 2019377666 A AU2019377666 A AU 2019377666A AU 2019377666 A AU2019377666 A AU 2019377666A AU 2019377666 A1 AU2019377666 A1 AU 2019377666A1
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- spool
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
- E02D7/26—Placing by using several means simultaneously
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- Mining & Mineral Resources (AREA)
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- General Engineering & Computer Science (AREA)
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- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
Provided is a hydraulic linear impact vibration pile hammer machine, comprising an impact vibration seat (11), a hydraulic cylinder (12) for applying impact and vibration to the impact vibration seat (11), a hydraulic station (13) for driving the hydraulic cylinder and a reversing mechanism for changing the direction of hydraulic oil entering the hydraulic cylinder (12) according to a preset frequency; the hydraulic cylinder (12) comprises a cylinder body (121) and a piston rod (122), wherein, the cylinder body (121) is directly or indirectly fixed to the impact vibration seat (11), and an impact hammer (15) is fixed to the piston rod (122).
Description
[ 0001] The application is based on and claims the benefit of the priority from Chinese patent application No. 201811321606.X, filed on November 7, 2018, the entire contents of which are incorporated herein by reference.
[ 0002] The disclosure relates to the technology of pile foundation construction machinery for building engineering and engineering equipment, and in particular relates to a hydraulic linear impact vibration pile hammer.
[ 0003] Pile foundation construction is often applied to the fields of construction machinery, offshore engineering equipment, offshore wind power and cross-sea bridges. Pile foundation construction relies on equipment such as pile hammer machine.
[ 0004] The current pile hammer has problems such as slow pile driving speed and high energy consumption. For example, the disclosure patent with the publication number CN 108252304A and entitled Electric Impact Piling Hammer includes an operation console, a control cabinet, a power supply and a hammer body. The winch drum is driven by an variable frequency motor to raise the hammer core. The hammer core will be quickly released when it reaches the preset height, then the hammer core will freely fall for impacting and pile driving, so that the electric energy of the power grid can be converted into potential energy for impacting and pile driving. The device is powered by electricity, but the structure thereof is still a traditional impact hammer, the pile driving is performed by the impact force, which leads to a larger energy loss, a slower speed and a lower mechanical efficiency.
[ 0005] In view of this, the disclosure aims to provide a hydraulic linear impact vibratory pile hammer with a high speed and a high mechanical efficiency.
[ 0006] To achieve the above objective, the solution of the disclosure is implemented as follows.
[ 0007] An embodiment of the disclosure provides a hydraulic linear impact vibratory pile hammer, which includes an impact vibration seat, a hydraulic cylinder for applying an impact and a vibration to the impact vibration seat, a hydraulic station for driving the hydraulic cylinder, and a reversing mechanism for changing a direction of hydraulic oil entering the hydraulic cylinder according to a preset frequency.
[ 0008] The hydraulic cylinder includes a cylinder body and a piston rod. The cylinder body is directly or indirectly fixed to the impact vibration seat, and an impact hammer is fixed to the piston rod. The impact hammer applies an impact to the impact vibration seat when the piston rod moves, and the cylinder body applies a vibration to the impact vibration seat when the piston rod moves.
[ 0009] In the above solution, the piston rod is disposed above the hydraulic cylinder and moves in the vertical direction. A bottom of the cylinder body is fixed to a top of the impact vibration seat. The impact hammer includes a fixing portion and an impact portion. The fixing portion is fixed to the piston rod, and the impact portion extends from above the cylinder body along an outer periphery of the cylinder body to the impact vibration seat. When the piston rod moves, the piston rod drives the impact hammer to move to apply the impact to the impact vibration seat.
[ 0010] In the above solution, the pile hammer is further provided with an impact reinforcing mechanism, which includes an elastic member disposed on the impact vibration seat. When the impact hammer is driven by the piston rod to move upward, the elastic member is compressed for storing energy. When the impact hammer is driven by the piston rod to move downward, an elastic force of the elastic member pushes the impact hammer to move downward.
[ 0011] In the above solution, the reversing mechanism includes a valve body with a sealed inner cavity and a spool which is rotatable and has one end provided in the inner cavity of the valve body. The valve body is provided with a first oil port and a second oil port connected to the hydraulic cylinder. The spool is provided with an oil inlet line and an oil return line connected to the hydraulic station. The oil inlet line includes at least one oil outlet configured to communicate with the first oil port or the second oil port, and the oil return line includes at least one oil inlet configured to communicate with the first oil port or the second oil port.
[ 0012] The spool is preset with at least two operating positions evenly distributed over a circumference of single rotation of the spool. When the spool rotates to a first operating position, the oil outlets communicate with the second oil port and the oil inlets communicate with the first oil port. When the spool rotates to a second operating position, the oil outlets communicate with the first oil port and the oil inlets communicate with the second oil port. The first operating position and the second operating position are operating positions which are adjacent to each other in a circumferential direction of the spool.
[ 0013] In the above solution, the first oil port and the second oil port are provided on an outer periphery of the valve body and are axially aligned with each other. An outer periphery of the spool is provided with two connection regions which surround the periphery of the spool and the radial positions of which respectively correspond to the first oil port and the second oil port. Each of the connection regions is provided with a circle of openings formed by the oil outlets and the oil inlets alternately arranged. Openings in the two connection regions are aligned axially, and types of two openings aligned axially are different.
[ 0014] In the above solution, the spool includes, on the outer periphery between the two connection regions, an annular groove surrounding the outer periphery of the spool.
The oil outlets are U-shaped grooves provided in the connection regions and communicating axially with the annular groove. The spool is also provided with a center hole which extends axially and an axis of which coincides with an axis of the spool. The oil inlets are first through holes provided in the connection regions and communicating radially with the center hole. The U-shaped grooves are not in communication with the center hole radially, and the first through holes are not in communication with the annular groove axially.
[ 0015] The oil inlet line is a line starting from the annular groove, passing through the U-shaped groove, then entering the first oil port or the second oil port. The oil return line is a line starting from the first oil port or the second oil port, passing through the first through hole and the center hole, finally entering the hydraulic station. The valve body is also provided with a first connection port communicating with the hydraulic station and with the annular groove, and a second connection port communicating with the hydraulic station and with the central hole. The spool is provided with a second through-hole cooperating with the second connection port and communicating with the central hole.
[ 0016] In the above solution, the spool is also provided with two annular grooves at both ends of the inner cavity of the valve body. One of the two annular grooves is provided with the second through-hole, and the other one of the two annular grooves is provided with a third through-hole communicating with the central hole.
[ 0017] In the above solution, the reversing mechanism further includes a motor that drives the spool to rotate. One end of the spool is located in the inner cavity of the valve body, and the other end of the spool passes through the valve body and is connected to an output shaft of the motor. The motor is a variable frequency motor.
[ 0018] In the above solution, the valve body is also provided with a spool sleeve. The spool sleeve is provided with a housing space which opens at two ends of the housing space. The spool is mounted in the housing space through one end of the inner cavity of the valve body. The spool and the spool sleeve are provided with a sealing structure at each of junctions between the spool and the spool sleeve on the two ends. An outer wall of the spool sleeve is fixed to the inner cavity of the valve body.
[0019] In the above solution, the sealing structure is a labyrinth sealing structure.
[0020] According to an embodiment of the present disclosure, a hydraulic linear impact vibration pile hammer is provided. The hydraulic linear impact vibration pile hammer includes an impact vibration seat, a hydraulic cylinder for applying an impact and a vibration to the impact vibration seat, a hydraulic station for driving the hydraulic cylinder, and a reversing mechanism for changing a direction of hydraulic oil entering the hydraulic cylinder according to a preset frequency. The cylinder body is directly or indirectly fixed to the impact vibration seat, and an impact hammer is fixed to the piston rod. The impact hammer applies an impact to the impact vibration seat when the piston rod moves, and the cylinder body applies a vibration to the impact vibration seat when the piston rod moves. Therefore, the hydraulic linear impact vibration pile hammer according to an embodiment of the present disclosure applies an impact and a vibration to the impact vibration seat simultaneously by the impact hammer and the cylinder body, and coupling of the vibration and the impact causes a greater pile sinking force, a fast pile driving speed and a high mechanical efficiency.
[ 0021] Other beneficial effects of the embodiments of the present disclosure will be further described in the specific implementations in combination with specific solutions.
[ 0022] FIG. 1 is a schematic view of a hydraulic linear impact vibration pile hammer according to an embodiment of the present disclosure.
[ 0023] FIG. 2 is a schematic view of the assembled impact vibration seat and hydraulic cylinder of the hydraulic linear impact vibration pile hammer according to an embodiment of the present disclosure.
[ 0024] FIG. 3 is a schematic view of the hydraulic cylinder of the hydraulic linear impact vibration pile hammer according to an embodiment of the present disclosure.
[ 0025] FIG. 4 is a schematic view of the assembled valve body and spool of the hydraulic linear impact vibration pile hammer according to an embodiment of the present disclosure.
[ 0026] FIG. 5 is a schematic view of the valve body of the hydraulic linear impact vibration pile hammer according to an embodiment of the present disclosure.
[ 0027] FIG. 6 is a schematic view of the spool of the hydraulic linear impact vibration pile hammer according to an embodiment of the present disclosure.
[ 0028] FIG. 7 is a schematic cross-sectional view taken along line C-C in FIG. 6.
[ 0029] FIG. 8 is a schematic view of a spool sleeve of the hydraulic linear impact vibration pile hammer according to an embodiment of the present disclosure.
[ 0030] It should be noted that, in the description of the embodiments of the present disclosure, unless otherwise specified and defined, the term "connection" should be understood broadly. For example, it may be an electrical connection, or a communication inside two elements, or a direct connection, or an indirect connection by way of intermediaries. For those of ordinary skill in the art, the specific meanings of the above terms may be understood according to specific situations.
[ 0031] It should be noted that, the term "first\second\third" involved in the embodiments of the present disclosure is only intended to distinguish the similar objects instead of representing a specific sequencing for objects. It may be understood that term "first\second\third" may be interchanged in a specific order or sequence if allowed. It should be understood that objects distinguished by term "first\second\third" may be interchanged under appropriate circumstances, so that the embodiments of the present disclosure described herein can be implemented in an order other than those illustrated or described herein.
[ 0032] According to an embodiment of the present disclosure, a hydraulic linear impact vibration pile hammer is provided. The pile hammer may include an impact vibration seat, a hydraulic cylinder for applying an impact and a vibration to the impact vibration seat, a hydraulic station for driving the hydraulic cylinder, and a reversing mechanism for changing a direction of hydraulic oil entering the hydraulic cylinder according to a preset frequency. The hydraulic cylinder includes a cylinder body and a piston rod. The cylinder body is directly or indirectly fixed to the impact vibration seat, and an impact hammer is fixed to the piston rod. The impact hammer applies an impact to the impact vibration seat when the piston rod moves, and the cylinder body applies a vibration to the impact vibration seat when the piston rod moves. The expression "the impact hammer applies an impact to the impact vibration seat when the piston rod moves" means that the impact hammer directly hits the impact vibration seat under the impact of hydraulic power. The expression "the cylinder body applies a vibration to the impact vibration seat when the piston rod moves" means that the cylinder body will generate a vibration under the action of hydraulic oil with a direction continuously changed. Here, the faster that the speed changes, the higher the vibration frequency, the greater the pile sinking force generated. The cylinder body is directly or indirectly fixed to the impact vibration seat, thus the vibration generated by the cylinder body will act on the impact vibration seat.
[0033] The principle of the embodiment of the present disclosure is as follows. An impact and a vibration are applied to the impact vibration seat simultaneously by the impact hammer and the cylinder body, and coupling of the vibration and the impact causes a greater pile sinking force, a fast pile driving speed and a high mechanical efficiency. In addition, a hydraulic system is used as a power to apply an impact to the impact vibration seat, and the hydraulic system starts and stops at a fast speed. Therefore, it may not resonate with other components or the resonance time is short, thus avoiding an impact failure of the other components in the pile hammer.
[0034] In an implementation, the piston rod may be disposed above the hydraulic cylinder and move in the vertical direction. A bottom of the cylinder body is fixed to a top of the impact vibration seat. The impact hammer includes a fixing portion and an impact portion. The fixing portion is fixed to the piston rod, and the impact portion extends from above the cylinder body along an outer periphery of the cylinder body to the impact vibration seat. That is to say, the impact portion is a ring mounted around the cylinder body. When the piston rod moves, the piston rod drives the impact hammer to move to apply the impact to the impact vibration seat. The cavity of the hydraulic cylinder is divided into a rod cavity and a rodless cavity, and the piston area of the rod cavity and the piston area of the rodless cavity are different. In the embodiment, the piston rod is located above the cylinder, the piston area of the rod cavity located above the cylinder is smaller and the piston area of the rodless cavity located below the piston rod is lager. When the reversing mechanism changes the direction at a preset time interval, the time for the piston rod to move upward and the time for the piston rod to move downward are equal. Regardless of upward or downward movement of the piston rod, the oil intakes of the cylinder body are also equal, and the oil pressures in the lines are also equal. As such, it is known from the hydraulic principle that since the piston area of the rod cavity is smaller, the speed of downward movement is larger, i.e., the stroke of downward movement is larger than the stroke of upward movement. The impact hammer will hit the impact vibration seat to apply an impact to the impact vibration seat every time it moves downward.
[0035] In an implementation, the pile hammer is further provided with an impact reinforcing mechanism, which includes an elastic member disposed on the impact vibration seat. When the impact hammer is driven by the piston rod to move upward, the elastic member is compressed for storing energy. When the impact hammer is driven by the piston rod to move downward, an elastic force of the elastic member pushes the impact hammer to move downward. Specifically, the elastic member may be a compression spring. As such, it is possible to increase the initial speed of the impact hammer when the impact hammer moves downward. Since the reaction speed at which the compression spring returns is larger than the reaction speed at which the piston rod reverses, it is possible to achieve a larger impact force.
[0036] In an implementation, the reversing mechanism includes a valve body with a sealed inner cavity and a spool which is rotatable and has one end provided in the inner cavity of the valve body. The valve body is provided with a first oil port and a second oil port connected to the hydraulic cylinder. The spool is provided with an oil inlet line and an oil return line connected to the hydraulic station, The oil inlet line includes at least one oil outlet configured to communicate with the first oil port or the second oil port, and the oil return line includes at least one oil inlet configured to communicate with the first oil port or the second oil port. The spool is preset with at least two operating positions evenly distributed over a circumference of single rotation of the spool. When the spool rotates to a first operating position, the oil outlets communicate with the second oil port and the oil inlets communicate with the first oil port. When the spool rotates to a second operating position, the oil outlets communicate with the first oil port and the oil inlets communicate with the second oil port. The first operating position and the second operating position are operating positions which are adjacent to each other in a circumferential direction of the spool. As such, the direction of the hydraulic oil entering the hydraulic cylinder can be quickly changed by the cooperation of the valve body and the spool and driven by a power device such as a motor, to ensure the operating efficiency of the pile hammer. It should be understood that the reversing mechanism may be an electromagnetic reversal valve. However, the reversing frequency of the electromagnetic reversal valve is relatively low.
[0037] In an implementation, the first oil port and the second oil port may be provided on an outer periphery of the valve body and are axially aligned with each other. An outer periphery of the spool is provided with two connection regions which surround the periphery of the spool and radial positions of which respectively correspond to the first oil port and the second oil port. Each of the connection regions is provided with a circle of openings formed by the oil outlets and the oil inlets alternately arranged. Openings in the two connection regions are aligned axially, and types of two openings aligned axially are different. As such, the direction of the hydraulic oil entering the hydraulic cylinder may be changed several times per single rotation of the spool, guaranteeing a higher efficiency of the pile hammer. It should be understood that, it is possible to provide fewer oil outlets and oil inlets. For example, the first oil port and the second oil port are arranged symmetrically at the outer periphery of the valve body, and the oil outlets and the oil inlets are also arranged symmetrically. In this way, the direction of hydraulic oil entering the hydraulic cylinder is changed only once per single rotation of the spool.
[0038] In an implementation, the spool includes, on the outer periphery between the two connection regions, an annular groove surrounding the outer periphery of the spool. The oil outlets are U-shaped grooves provided in the connection regions and communicating axially with the annular groove. The spool is also provided with a center hole which extends axially and an axis of which coincides with an axis of the spool. The oil inlets are first through holes provided in the connection regions and communicating radially with the center hole. The U-shaped grooves are not in communication with the center hole radially, and the first through holes are not in communication with the annular groove axially. The oil inlet line is a line starting from the annular groove, passing through the U-shaped groove, then entering the first oil port or the second oil port. The oil return line is a line starting from the first oil port or the second oil port, passing through the first through hole and the center hole, finally entering the hydraulic station. The valve body is also provided with a first connection port communicating with the hydraulic station and with the annular groove, and a second connection port communicating with the hydraulic station and with the central hole. The spool is provided with a second through hole cooperating with the second connection port and communicating with the central hole. As such, the entire structures of the oil inlet line and of the oil return line are relatively simple. It should be understood that other structures may be also provided. For example, each of the oil inlets or the oil outlets may be connected to the hydraulic station by a hose, so that the structures of the spool and of the valve body are more complex. It should be noted that the center hole described herein is not a process hole configured to determine the center of a workpiece in the general mechanical processing, but a hole an axis of which is consistent with the axis of the spool and which is configured to receive hydraulic oil.
[0039] In an implementation, the spool may also be provided with two annular grooves at both ends of the inner cavity of the valve body. One of the two annular grooves is provided with the second through-hole, and the other one of the two annular grooves is provided with a third through-hole communicating with the central hole. The whole cavity formed by the valve body and the spool may be filled with the hydraulic oil of the hydraulic station through the second through-hole and the third through-hole, to ensure that the oil in the oil outlets or in the oil inlets does not leak.
[0040] In an implementation, the reversing mechanism further includes a motor that drives the spool to rotate. One end of the spool is located in the inner cavity of the valve body, and the other end of the spool passes through the valve body and is connected to an output shaft of the motor. Driving the spool into rotation by a motor has the characteristics of high speed, simple structure and convenient control. It should be understood that other power devices may be also possible, such as a hydraulic motor, etc.
[ 0041] In an implementation, the motor may be a variable frequency motor. In this way, it is convenient to adjust the rotation speed of the motor, so that the pile hammer generates different impact forces and vibrations and is adapted to different soil mass properties. It should be understood that the normal operation will not be affected if the speed of the motor cannot be adjusted.
[ 0042] In an implementation, the valve body is also provided with a spool sleeve. The spool sleeve is provided with a housing space which opens at two ends of the housing space. The spool is mounted in the housing space through one end of the inner cavity of the valve body. The spool and the spool sleeve are provided with a sealing structure at each of junctions between the spool and the spool sleeve on the two ends. An outer wall of the spool sleeve is fixed to the inner cavity of the valve body. The design of separating the valve body and the spool sleeve can ensure the machining accuracy of the spool, to better guarantee that the hydraulic oil will not leak.
[ 0043] In an implementation, the sealing structure may be a labyrinth sealing structure. Since the spool rotates at a high speed during operation, the sealing structure needs to adapt the high-speed operation. Of course, there are many other sealing structures that can adapt to the high-speed rotation of the shaft, which will not be described in detail.
[ 0044] The disclosure will be described in detail in combination with the figures and specific embodiments. It should be understood that specific embodiments described herein are only used for explaining the disclosure, instead of limiting the disclosure.
[ 0045] FIG. 1 is a schematic view of a hydraulic linear impact vibration pile hammer according to an embodiment of the present disclosure. As shown in FIG. 1, the pile hammer includes an impact vibration seat 11, a hydraulic cylinder 12 for applying an impact and a vibration to the impact vibration seat 11, a hydraulic station 13 for driving the hydraulic cylinder 12, and a reversing mechanism for changing a direction of hydraulic oil entering the hydraulic cylinder 12 according to a preset frequency. The hydraulic cylinder 12 includes a cylinder body 121 and a piston rod 122. The cylinder body 121 is fixed to the impact vibration seat 11, and an impact hammer 15 is fixed to the piston rod 122. The impact hammer 15 applies an impact to the impact vibration seat 11 when the piston rod 122 moves, and the cylinder body 121 applies a vibration to the impact vibration seat 11 when the piston rod 122 moves.
[ 0046] In the embodiment, a pile body 19 is disposed under the impact vibration seat 11, and the impact vibration seat 11 is fixed to the pile body 19 by way of a hydraulic clamp 20. The reversing mechanism is connected to the hydraulic station 13 and the hydraulic cylinder 12 by way of a rubber hose 21.
[ 0047] In the embodiment, as shown in FIGS. 2 and 3, the bottom of the cylinder body 121 is fixed to the top of the impact vibration seat 11 by way of screws, so that the vibration of the cylinder body 121 can be transferred to the impact vibration seat 11.
[ 0048] In the embodiment, the piston rod 122 is disposed above the hydraulic cylinder 12 and moves in the vertical direction. The impact hammer 15 includes a fixing portion 151 and an impact portion 152. The fixing portion 151 is fixed to the piston rod 122, and the impact portion 152 extends from above the cylinder body 121 along the outer periphery of the cylinder body 121 to the impact vibration seat 11. Since the piston rod 122 is disposed above the hydraulic cylinder 12, it is known from the hydraulic principle that the piston area of the rod cavity is smaller, the speed of downward movement is larger, i.e., the stroke of downward movement is larger than the stroke of upward movement. The impact hammer 15 will hit the impact vibration seat 11 every time it moves down, thus downward movement of the piston rod 122 drives the impact hammer 15 to apply an impact to the impact vibration seat 11.
[0049] In the embodiment, the fixing portion 151 is fixed to the piston rod 122 by way of screws. The fixing portion 151 is also fixed to the impact portion 152 by way of screws. It is appreciated that the fixing portion 151 may be integral with the impact portion 152.
[0050] In the embodiment, in order to further increase the impact force and the vibration of the pile hammer, the pile hammer is also provided with an impact reinforcing mechanism, which includes an elastic member disposed on the impact vibration seat 11. In the embodiment, the elastic member is a compression spring 111. There are six compression springs 111 evenly arranged around the entire impact hammer 15. The impact reinforcing mechanism also includes a spring securing pillar 112, a spring compression ring 113 and a spring securing cap 114. The spring securing pillar 112 is fixed on the impact vibration seat 11. The inner end of the spring compression ring 113 is mounted around the impact hammer 15, and the outer end thereof is mounted around the spring securing pillar 112. The spring compression ring 113 can be driven by the impact hammer 15 to slide up and down along the spring securing pillar 112. The compression spring 111 is mounted around the spring securing pillar 112, and the bottom of the compression spring 111 abuts against the spring compression ring 113. The spring securing cap 114 is mounted around the top of the spring securing pillar 112 to prevent the compression spring 111 from leaving the spring securing pillar 112. As such, when the impact hammer 15 is driven by the piston rod 122 to move upward, the elastic member is compressed for storing energy. When the impact hammer 15 is driven by the piston rod 122 to move downward, the elastic force of the elastic member pushes the impact hammer 15 to move downward. Specifically, the compression spring 111 may be a disc spring.
[0051] In the embodiment, as shown in FIG. 1 and FIG. 4, the reversing mechanism includes a valve body 16, a spool 17 and a motor 18. One end of the spool 17 is located in the inner cavity of the valve body 16, and the other end of the spool passes through the valve body 16 and is connected to the output shaft of the motor 18. The spool 17 is a body for changing the direction of the hydraulic oil, and the valve body 16 is configured to house the spool 17. In order that oil entering and exiting the spool 17 does not lose energy due to leakage, the cavity of the valve body 16 housing the spool 17 remains sealed from the outside. The motor 18 is configured to drive the spool 17 into rotation, which has the characteristics of high speed, simple structure and convenient control. In the embodiment, the other end of the spool 17 is connected to the output shaft of the motor 18 by a coupling.
[0052] In the embodiment, as shown in FIG. 4, in order to guarantee the sealing of the valve body 16 easier, the valve body 16 is also provided with a spool sleeve 161. The spool sleeve 161 is provided with a housing space which opens at two ends of the housing space. The spool 17 is mounted in the housing space through one end of the inner cavity of the valve body 16. The spool 17 and the spool sleeve 161 are provided with a labyrinth sealing structure 171 at teach of junctions between the spool and the spool sleeve on the two ends. That is to say, a plurality of annular grooves in a saw-tooth shape are formed on the outer peripheral face of the valve core 17. Such a sealing structure can be adapted to the high-speed rotation of the spool 17 in operation. The outer wall of the spool sleeve 161 is fixed to the inner cavity of the valve body 16, specifically by screws 162.
[ 0053] In the embodiment, in order to make the spool 17 to rotate in the spool sleeve 161 at a high speed, both ends of the spool sleeve 161 are provided with rolling bearings 168, and both ends of the spool 17 are provided with journals cooperating with the rolling bearings 168.
[ 0054] In the embodiment, as shown in FIG. 4 and FIG. 5, the valve body 16 is provided with a first oil port 163 and a second oil port 164 connected to the hydraulic cylinder 12. In the embodiment, the first oil port 163 and the second oil port 164 are provided on the outer periphery of the valve body 16 and are axially aligned with each other.
[ 0055] As shown in FIG. 4 and FIG. 6, the outer periphery of the spool 17 is provided with two connection regions which surround the periphery of the spool 17 and the radial positions of which respectively correspond to the first oil port 163 and the second oil port 164. Each of the connection regions includes openings including oil outlets and oil inlets. The number of each of the oil outlets and oil inlets is four. The oil outlets and the oil inlets are alternately arranged in the circumferential direction and are aligned in the axial direction. That is to say, there are eight rows of openings in the circumferential direction and two columns of openings in the axial direction.
[ 0056] In the operating, the initial operating position of the spool 17 corresponds to the above-mentioned first operating position. The first oil port 163 and the second oil port 164 are respectively aligned with the openings of the two connection regions, and the types of openings aligned with the first oil port 163 and openings aligned with the second oil port 164 are different. That is to say, one of the oil ports is aligned with the oil outlet, while the other one of the oil ports is aligned with the oil inlet, thereby forming a circulation circuit. When the spool 17 rotates by one eighth of a single rotation of the spool, the operating position of the spool corresponds to the above-mentioned second operating position. Openings aligned with the first oil port 163 and openings aligned with the second oil port 164 are exchanged, and the direction of the hydraulic oil entering the hydraulic cylinder 12 is changed, i.e., the movement direction of the piston rod 122 of the hydraulic cylinder 12 is changed.
[0057] In the embodiment, as shown in FIGS. 5, 6 and 7, the spool 17 includes, on the outer periphery between the two connection regions, an annular groove 173 surrounding the outer periphery of the spool 17. The oil outlets are U-shaped grooves 174 provided in the connection regions and communicating axially with the annular groove 173. The spool 17 is also provided with a center hole 175 which extends axially and the axis of which coincides with the axis of the spool 17. The oil inlets are first through holes 176 provided in the connection regions and communicating radially with the center hole 175. The U-shaped grooves 174 are not in communication with the center hole 175 radially, and the first through holes 176 are not in communication with the annular groove 173 axially. As such, a line starting from the annular groove 173, passing through the U shaped groove 174, then entering the first oil port 163 or the second oil port 164 constitutes an oil inlet line. A line starting from the first oil port 163 or the second oil port 164, passing through the first through-hole 176 and the center hole 175, finally entering the hydraulic station 13 constitutes the oil return line. The valve body 16 is also provided with a first connection port 165 communicating with the hydraulic station 13 and with the annular groove 173, and a second connection port 166 communicating with the hydraulic station 13 and with the central hole 175. The spool 17 is provided with a second through-hole 177 cooperating with the second connection port 166 and communicating with the central hole 175.
[0058] In the embodiment, the spool 17 is also provided with two annular grooves at both ends of the inner cavity of the valve body 16. One of the two annular grooves is provided with the second through-hole 177, and the other one of the two annular grooves is provided with a third through-hole 178 communicating with the central hole 175. The whole cavity formed by the valve body 16 and the spool 17 may be filled with the hydraulic oil of the hydraulic station 13 through the second through-hole 177 and the third through-hole 178, to ensure that the oil in the oil outlets or in the oil inlets does not leak.
[ 0059] In the embodiment, in order to facilitate the processing of the central hole 175, one end of the central hole 175 penetrates one end of the spool 17. As shown in FIGS. 4, 6 and 7, the central hole 175 is opens at the left end thereof. In order to avoid an oil leakage, a plug 179 is installed at the left end. In order to facilitate the processing of the U-shaped grooves 174 and the first through-hole 176 and to facilitate the entering and exiting of the hydraulic oil, as shown in FIG. 7, the cross-section of the U-shaped groove 174 is trapezoidal, and the first through-hole 176 also has a segment of flared hole with a trapezoidal cross-section.
[ 0060] In the embodiment, as shown in FIGS. 5 and 8, the spool sleeve 161 is provided with through-holes cooperating with the first oil port 163, the second oil port 164, the first connection port 165 and the second connection port 166, so that both the hydraulic oil provided by the hydraulic station 13 and the hydraulic oil returned from the hydraulic cylinder 12 can smoothly pass through the spool 17.
[ 0061] In the embodiment, the motor 18 is a variable frequency motor. This can facilitate adjusting of the rotation speed of the motor, so that the pile hammer has different impact forces and vibrations to be adapted to different soil mass properties.
[ 0062] The above description is just the preferred embodiments of the disclosure and is not intended to limit the scope of the disclosure. Any modification, equivalent replacement and improvement, etc. within the spirit and principle of the disclosure should be contained in the scope of the disclosure.
[ 0063] The hydraulic linear impact vibratory pile hammer according to the embodiment of the disclosure applies an impact and a vibration to the impact vibration seat simultaneously by the impact hammer and the cylinder body, and coupling of the vibration and the impact generates a greater pile sinking force, a fast pile driving speed and a high mechanical efficiency.
Claims (10)
1. A hydraulic linear impact vibration pile hammer, the pile hammer comprising an impact vibration seat, a hydraulic cylinder for applying an impact and a vibration to the impact vibration seat, a hydraulic station for driving the hydraulic cylinder, and a reversing mechanism for changing a direction of hydraulic oil entering the hydraulic cylinder according to a preset frequency;
the hydraulic cylinder comprising a cylinder body and a piston rod, the cylinder body being directly or indirectly fixed to the impact vibration seat, an impact hammer being fixed to the piston rod; the impact hammer applying an impact to the impact vibration seat when the piston rod moves, and the cylinder body applying a vibration to the impact vibration seat when the piston rod moves.
2. The hydraulic linear impact vibration pile hammer of claim 1, wherein the piston rod is disposed above the hydraulic cylinder and moves in the vertical direction; a bottom of the cylinder body is fixed to a top of the impact vibration seat; the impact hammer comprises a fixing portion and an impact portion, the fixing portion is fixed to the piston rod, and the impact portion extends from above the cylinder body along an outer periphery of the cylinder body to the impact vibration seat; when the piston rod moves, the piston rod drives the impact hammer to move to apply the impact to the impact vibration seat.
3. The hydraulic linear impact vibration pile hammer of claim 1, wherein the pile hammer is further provided with an impact reinforcing mechanism, which comprises an elastic member disposed on the impact vibration seat; when the impact hammer is driven by the piston rod to move upward, the elastic member is compressed for storing energy; when the impact hammer is driven by the piston rod to move downward, an elastic force of the elastic member pushes the impact hammer to move downward.
4. The hydraulic linear impact vibration pile hammer of claim 1 or 2, wherein the reversing mechanism comprises a valve body with a sealed inner cavity and a spool which is rotatable and has one end provided in the inner cavity of the valve body; the valve body is provided with a first oil port and a second oil port connected to the hydraulic cylinder, the spool is provided with an oil inlet line and an oil return line connected to the hydraulic station; the oil inlet line comprises at least one oil outlet configured to communicate with the first oil port or the second oil port, and the oil return line comprises at least one oil inlet configured to communicate with the second oil port or the first oil port;
the spool is preset with at least two operating positions evenly distributed over a circumference of single rotation of the spool; when the spool rotates to a first operating position, the oil outlets communicate with the second oil port and the oil inlets communicate with the first oil port; when the spool rotates to a second operating position, the oil outlets communicate with the first oil port and the oil inlets communicate with the second oil port; wherein the first operating position and the second operating position are operating positions which are adjacent to each other in a circumferential direction of the spool.
5. The hydraulic linear impact vibration pile hammer of claim 4, wherein the first oil port and the second oil port are provided on an outer periphery of the valve body and are axially aligned with each other; an outer periphery of the spool is provided with two connection regions which surround the periphery of the spool and radial positions of which respectively correspond to the first oil port and the second oil port, each of the connection regions is provided with a circle of openings formed by the oil outlets and the oil inlets alternately arranged, openings in the two connection regions are aligned axially, and types of two openings aligned axially are different.
6. The hydraulic linear impact vibration pile hammer of claim 5, wherein the spool comprises, on the outer periphery between the two connection regions, an annular groove surrounding the outer periphery of the spool, the oil outlets are U-shaped grooves provided in the connection regions and communicating axially with the annular groove; the spool is also provided with a center hole which extends axially and an axis of which coincides with an axis of the spool, and the oil inlets are first through-holes provided in the connection regions and communicating radially with the center hole; the U-shaped grooves are not in communication with the center hole radially, and the first through-holes are not in communication with the annular groove axially; the oil inlet line is a line starting from the annular groove, passing through the U shaped groove, then entering the first oil port or the second oil port; the oil return line is a line starting from the first oil port or the second oil port, passing through the first through-hole and the center hole, finally entering the hydraulic station; the valve body is also provided with a first connection port communicating with the hydraulic station and with the annular groove, and a second connection port communicating with the hydraulic station and with the central hole, the spool is provided with a second through-hole cooperating with the second connection port and communicating with the central hole.
7. The hydraulic linear impact vibration pile hammer of claim 6, wherein the spool is also provided with two annular grooves at both ends of the inner cavity of the valve body, one of the two annular grooves is provided with the second through-hole, and the other one of the two annular grooves is provided with a third through-hole communicating with the central hole.
8. The hydraulic linear impact vibration pile hammer of claim 4, wherein the reversing mechanism further comprises a motor that drives the spool to rotate, one end of the spool is located in the inner cavity of the valve body, and the other end of the spool passes through the valve body and is connected to an output shaft of the motor; the motor is a variable frequency motor.
9. The hydraulic linear impact vibration pile hammer of claim 4, wherein the valve body is also provided with a spool sleeve, the spool sleeve is provided with a housing space which opens at two ends of the housing space; the spool is mounted in the housing space through one end of the inner cavity of the valve body, the spool and the spool sleeve are provided with a sealing structure at each of junctions between the spool and the spool sleeve on the two ends; an outer wall of the spool sleeve is fixed to the inner cavity of the valve body.
10. The hydraulic linear impact vibration pile hammer of claim 6, wherein the sealing structure is a labyrinth sealing structure.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811321606.XA CN109594561B (en) | 2018-11-07 | 2018-11-07 | Hydraulic linear impact vibration pile hammer machine |
| CN201811321606.X | 2018-11-07 | ||
| PCT/CN2019/075111 WO2020093618A1 (en) | 2018-11-07 | 2019-02-14 | Hydraulic linear impact vibration pile hammer machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2019377666A1 true AU2019377666A1 (en) | 2020-09-24 |
| AU2019377666B2 AU2019377666B2 (en) | 2022-01-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2019377666A Active AU2019377666B2 (en) | 2018-11-07 | 2019-02-14 | Hydraulic linear impact vibration pile hammer machine |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN109594561B (en) |
| AU (1) | AU2019377666B2 (en) |
| WO (1) | WO2020093618A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112343623B (en) * | 2020-11-02 | 2023-06-06 | 中交二航局成都城市建设工程有限公司 | Tunnel segment anti-floating structure and method |
| CN114411869A (en) * | 2022-03-30 | 2022-04-29 | 徐州徐工挖掘机械有限公司 | Oil cylinder, breaking hammer and piling hammer |
| CN115305914A (en) * | 2022-09-13 | 2022-11-08 | 青建总承包建设有限公司 | Hydraulic pile hammer for building construction |
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| JPS5430961B1 (en) * | 1965-05-24 | 1979-10-04 | ||
| JPS52154781U (en) * | 1976-05-20 | 1977-11-24 | ||
| JPS5394404A (en) * | 1977-01-31 | 1978-08-18 | Sanwa Kigyo Kk | Device and method for driving pile |
| US4187917A (en) * | 1977-11-30 | 1980-02-12 | Hydroacoustics, Inc. | Pile driver |
| EP0024748A3 (en) * | 1979-02-08 | 1981-08-26 | Proweco Bv. | Construction and/or application in relation to the generation or the use of pressures, forces, flows and movements in and by means of hydraulic or hydro-pneumatic systems |
| SU1025798A1 (en) * | 1981-11-16 | 1983-06-30 | Винницкий политехнический институт | Hydraulic pile hammer |
| EP0266206A1 (en) * | 1986-10-31 | 1988-05-04 | Erico International Corporation | Ground rods and method and apparatus for forming and placing such rods |
| DE4118069C2 (en) * | 1991-06-01 | 1997-11-20 | Udo Hahlbrock | Vibrator for a vibratory hammer |
| CN2240547Y (en) * | 1994-05-21 | 1996-11-20 | 吉林工业大学 | Accelerated down impact hydraulic hammer |
| CN2216079Y (en) * | 1995-04-14 | 1995-12-27 | 赵理郁 | Hydraulic static and dynamic compound pile-driver |
| CN2340810Y (en) * | 1998-09-03 | 1999-09-29 | 华北水利水电学院 | Portable pile driver for emergency |
| GB2344547B (en) * | 1998-11-14 | 2002-12-18 | Aldridge Piling Equipment | Actuator apparatus |
| CN104831729A (en) * | 2015-05-11 | 2015-08-12 | 创银机械技术(上海)有限公司 | Impact vibration type pile hammer |
| CN107013523B (en) * | 2015-06-02 | 2018-05-01 | 台州骊威环保科技有限公司 | The reversing arrangement and application method of a kind of hydraulic hammer |
| US11255064B2 (en) * | 2016-11-17 | 2022-02-22 | Junttan Oy | Driving cylinder of a pile driving rig and a pile driving rig |
| CN207553096U (en) * | 2017-06-11 | 2018-06-29 | 煤炭工业济南设计研究院有限公司 | A kind of civil engineering piling equipment |
| CN107620308A (en) * | 2017-10-24 | 2018-01-23 | 江苏巨威机械有限公司 | guide rod type hydraulic pile hammer |
| CN207672569U (en) * | 2017-11-13 | 2018-07-31 | 四川工商学院 | A kind of building piling machine |
| CN109469058B (en) * | 2018-10-15 | 2020-09-29 | 许慧保 | Hydraulic excitation high-frequency linear impact device |
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2018
- 2018-11-07 CN CN201811321606.XA patent/CN109594561B/en active Active
-
2019
- 2019-02-14 AU AU2019377666A patent/AU2019377666B2/en active Active
- 2019-02-14 WO PCT/CN2019/075111 patent/WO2020093618A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| CN109594561B (en) | 2020-10-27 |
| WO2020093618A1 (en) | 2020-05-14 |
| AU2019377666B2 (en) | 2022-01-13 |
| CN109594561A (en) | 2019-04-09 |
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