CN109594561B - Hydraulic Linear Impact Vibratory Pile Hammer - Google Patents

Abstract

The invention discloses a hydraulic linear impact vibration pile hammer machine. The hydraulic linear impact vibration pile hammer machine comprises an impact vibration seat, a hydraulic cylinder for applying impact and vibration to the impact vibration seat, a hydraulic station for driving the hydraulic cylinder, and a press A reversing mechanism for changing the direction of hydraulic oil entering the hydraulic cylinder with a preset frequency; the hydraulic cylinder includes a cylinder block and a piston rod, the cylinder block is directly or indirectly fixed to the shock vibration seat, and the piston rod An impact hammer is fixed. The hydraulic linear impact vibration pile hammer of the invention has greater pile driving force, high pile driving speed and high mechanical efficiency.

Description

Hydraulic Linear Impact Vibratory Pile Hammer

technical field

The invention relates to a foundation pile construction machinery technology of construction engineering and engineering equipment, in particular to a hydraulic linear impact vibration pile hammer machine.

Background technique

Pile foundation construction is often required in the fields of construction machinery, marine engineering equipment, offshore wind power and cross-sea bridges. The construction of pile foundations relies on equipment such as pile hammer machines.

The current pile hammer machine has the problems of slow piling speed and high energy consumption. For example, the invention patent with publication number CN108252304A and titled "Electric Impact Pile Hammer" includes a console, a control cabinet, a power supply and a hammer body. In this invention, the winch drum is driven by a variable frequency motor to lift the hammer core. When the hammer core reaches the preset value It is quickly released when the height is high, and the hammer core is free to fall to impact the pile, realizing the conversion of power grid electric energy into the impact potential energy of piling. The device uses electricity as the power, but the structure is still a traditional impact hammer, relying on the impact force for piling, the energy loss is relatively large, the speed is slow, and the mechanical efficiency is relatively low.

SUMMARY OF THE INVENTION

In view of this, the present invention expects to provide a hydraulic linear impact vibratory pile hammer machine with high speed and high mechanical efficiency.

In order to achieve the above object, the technical scheme of the present invention is achieved in this way:

The present invention provides a hydraulic linear impact vibration pile hammer machine, the pile hammer machine includes an impact vibration seat, a hydraulic cylinder for applying impact and vibration to the impact vibration seat, a hydraulic station for driving the hydraulic cylinder, and a hydraulic pressure change according to a preset frequency. A reversing mechanism for the direction of the hydraulic oil entering the hydraulic cylinder;

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 the piston rod is fixed with an impact hammer; The shock vibration seat applies shock, and the cylinder body applies vibration to the shock vibration seat when the piston rod moves.

In the above solution, the piston rod is arranged above the hydraulic cylinder, and the movement direction is the vertical direction; the bottom end of the cylinder body is fixed on the top end of the impact vibration seat; the impact hammer includes a fixed part and a an impact part, the fixing part is fixed with the piston rod, the impact part extends from the top of the cylinder body to the impact vibration seat along the periphery of the cylinder body; when the piston rod moves, it drives the impact hammer move and apply impact to the shock vibration seat.

In the above solution, the pile hammer machine is further provided with an impact strengthening mechanism, and the impact strengthening mechanism includes an elastic component arranged on the impact vibration seat; when the impact hammer moves upward under the driving of the piston rod, the impact strengthening mechanism is The elastic component is compressed to store energy; when the impact hammer is driven downward by the piston rod, the elastic force of the elastic component pushes the impact hammer to move downward.

In the above solution, the reversing mechanism includes a valve body with an inner cavity sealed and a valve core whose one end is disposed in the cavity of the valve body and can rotate; the valve body is provided with a first working oil port connected to the hydraulic cylinder and a second working oil port, the valve core is provided with an oil inlet pipeline and an oil return pipeline connecting the hydraulic station; the oil inlet pipeline includes at least one oil inlet that can communicate with the first working oil port or the second working an oil outlet of the oil port, and the oil return pipeline includes at least one oil inlet that can communicate with the second working oil port or the first working oil port;

The valve core is preset with at least two working positions evenly distributed on the circumference in a rotating circle; when the valve core rotates to the first working position, the oil outlet is connected to the second working oil port, The oil inlet communicates with the first working oil port; when the valve core rotates to the second working position, the oil outlet communicates with the first working oil port, and the oil inlet communicates with the second working oil port A working oil port; wherein, the first working position and the second working position are working positions adjacent in the circumferential direction of the valve core.

In the above solution, the first working oil port and the second working oil port are both opened on the outer circumference of the valve and are axially aligned; the outer circumference of the valve core is provided with two surrounding the entire valve core. The circumferential and radial positions respectively correspond to the connection areas of the first working oil port and the second working oil port, and each of the connection areas is provided with alternately arranged oil outlet ports and oil inlet ports. One ring of oil ports, the oil ports in the two connecting regions are axially aligned, and the two axially aligned oil ports are of different types.

In the above solution, the outer surface of the valve core between the two connection areas is provided with an annular groove surrounding the outer surface of the entire valve core, and the oil outlet is a shaft of the annular groove opened in the connection area. The spool is also provided with a central hole extending axially and the axis is consistent with the axis of the spool, and the oil inlet is the first opening in the connecting area that communicates with the central hole in the radial direction. a through hole; the U-shaped groove is not communicated with the central hole in the radial direction, and the first through hole is not communicated with the annular groove in the axial direction;

The oil inlet pipeline is a pipeline that starts from the annular groove and flows into the first working oil port or the second working oil port after passing through the U-shaped groove; the oil return pipeline is a pipeline from the From the first working oil port or the second working oil port, after passing through the first through hole and the central hole, it flows to the oil return pipeline of the hydraulic station; the valve body is also provided with a pipeline for communicating with the hydraulic pressure The first connecting oil port of the station and the annular groove and the second connecting oil port connecting the hydraulic station and the central hole, the valve core is provided with the second connecting oil port and the center A second through hole in which the holes are communicated.

In the above solution, the valve core is further provided with two annular grooves at both ends of the valve body cavity, one of the two annular grooves is provided with the second through hole, and the other is provided with the second through hole. The third through hole communicated with the central hole.

In the above solution, the reversing mechanism further includes a motor for driving the valve core to rotate, one end of the valve core is located in the cavity of the valve body, and the other end of the valve core passes through the valve body and the valve core. The output shaft of the motor is connected; the motor is a variable frequency motor.

In the above solution, the valve body is further provided with a valve core sleeve, and the valve core sleeve is provided with an accommodating space with openings at both ends; the valve core is inserted into the accommodating space at one end of the valve body cavity The valve core and the valve core sleeve are provided with a sealing structure at the connection between the two ends; the outer wall of the valve core sleeve is fixed in the valve body cavity.

In the above solution, the sealing structure is a labyrinth-type sealing structure.

The hydraulic linear impact vibration pile hammer machine of the present invention includes an impact vibration seat, a hydraulic cylinder for applying impact and vibration to the impact vibration seat, a hydraulic station for driving the hydraulic cylinder, and a hydraulic pressure entering the hydraulic cylinder according to a preset frequency. A reversing mechanism for the direction of oil; the cylinder body is directly or indirectly fixed to the impact vibration seat, and the piston rod is fixed with an impact hammer; the impact hammer is directly or indirectly fixed to the impact vibration seat when the piston rod moves When an impact is applied, the cylinder body applies vibration to the impact vibration seat when the piston rod moves; it can be seen that the hydraulic linear impact vibration pile hammer machine of the present invention simultaneously applies impact and vibration to the impact vibration seat through the impact hammer and the cylinder body. Vibration, vibration and shock coupling, generate greater pile driving force, fast piling speed and high mechanical efficiency.

Other beneficial effects of the present invention will be further described in specific embodiments in conjunction with specific technical solutions.

Description of drawings

Fig. 1 is the schematic diagram of the hydraulic linear impact vibrating pile hammer according to the embodiment of the present invention;

Fig. 2 is the schematic diagram after the impact vibration seat and the hydraulic cylinder in the hydraulic linear impact vibration pile hammer machine of the embodiment of the present invention are assembled;

Fig. 3 is the schematic diagram of the hydraulic cylinder in the hydraulic linear impact vibration pile hammer according to the embodiment of the present invention;

4 is a schematic diagram of the assembled valve body and valve core in the hydraulic linear impact vibrating pile hammer machine according to the embodiment of the present invention;

5 is a schematic diagram of a valve body in a hydraulic linear impact vibratory pile hammer according to an embodiment of the present invention;

6 is a schematic diagram of a valve core in a hydraulic linear impact vibratory pile hammer according to an embodiment of the present invention;

Fig. 7 is the cross-sectional schematic diagram of the C-C direction in Fig. 6;

8 is a schematic diagram of a valve core sleeve in a hydraulic linear impact vibratory pile hammer according to an embodiment of the present invention.

Detailed ways

It should be noted that, in the description of the embodiments of the present invention, unless otherwise stated and limited, the term "connection" should be understood in a broad sense. For example, it may be an electrical connection, or the internal communication between two components, or a direct connection. , and may also be indirectly connected through an intermediate medium, and those of ordinary skill in the art can understand the specific meanings of the above terms according to specific circumstances.

It should be noted that, in the embodiments of the present invention, if the term "first\second\third" is involved, it only distinguishes similar objects, and does not represent a specific ordering of objects. It is understandable that "first\second\third" "Second\Third" can be interchanged in a specific order or sequence where permitted. It should be understood that the "first\second\third" distinctions may be interchanged under appropriate circumstances to enable the embodiments of the invention described herein to be practiced in sequences other than those illustrated or described herein.

The embodiment of the present invention provides a hydraulic linear impact vibration pile hammer machine, and the pile hammer machine may include an impact vibration base, a hydraulic cylinder for applying impact and vibration to the impact vibration base, a hydraulic station for driving the hydraulic cylinder, and a hydraulic cylinder for driving the hydraulic cylinder. Set a reversing mechanism whose frequency changes the direction of the hydraulic oil entering the hydraulic cylinder; the hydraulic cylinder includes a cylinder body and a piston rod, the cylinder body is directly or indirectly fixed to the shock vibration seat, and the piston rod is fixed There is an impact hammer; the impact hammer exerts impact on the impact vibration seat when the piston rod moves, and the cylinder body applies vibration to the impact vibration seat when the piston rod moves. The impact hammer exerts an impact on the impact vibration seat when the piston rod moves, which means that the impact hammer directly hits the impact vibration seat under the impact of hydraulic power; the cylinder blocks the impact vibration seat when the piston rod moves. The vibration applied by the impact vibration seat means that the cylinder body will vibrate under the action of the hydraulic oil that constantly changes direction; here, the faster the change speed, the higher the vibration frequency, and the greater the generated pile driving force; and the cylinder body directly Or indirectly fixed to the shock vibration seat, so the vibration generated by the cylinder will act on the shock vibration seat.

The principle of the embodiment of the present invention: the impact and vibration are simultaneously applied to the impact vibration seat by the impact hammer and the cylinder body, and the vibration and impact are coupled to generate a larger pile driving force, and the pile driving speed is fast and the mechanical efficiency is high. And the power to apply the shock to the shock vibration seat is the hydraulic system, and the hydraulic system starts and stops quickly, so it may not resonate with other components or the resonance time is short, avoiding the impact of other components in the pile hammer machine. impact damage.

In one embodiment, the piston rod may be arranged above the hydraulic cylinder, and the movement direction is a vertical direction; the bottom end of the cylinder body is fixed on the top end of the impact vibration seat; the impact hammer It includes a fixed part and an impact part, the fixed part is fixed with the piston rod, the impact part extends from the top of the cylinder body to the impact vibration seat along the periphery of the cylinder body, that is, the impact part is a sleeve The ring is arranged on the cylinder body; when the piston rod moves, it drives the impact hammer to move and exerts impact on the impact vibration seat. Since the cavity of the hydraulic cylinder is divided into a rod cavity and a rodless cavity, the rod cavity and the rodless cavity have different piston areas. In this embodiment, the piston rod is at the top, the upper rod cavity has a small piston area, and the lower one has no piston. The piston area of the rod cavity is large; when the reversing mechanism changes direction according to the set time, the time for the upward or downward of the piston rod is equal, and the oil intake of the cylinder is also the same regardless of whether it is upward or downward. The oil pressure is also equal, so according to the hydraulic principle: because the piston area of the upper rod cavity is small, the downward speed is greater, that is, the downward stroke length is greater than the upward stroke length, and each time it descends, the impact hammer will hit the impact vibration. seat, and shock is applied to the shock vibration seat.

In one embodiment, the pile hammer machine may also be provided with an impact strengthening mechanism, the impact strengthening mechanism includes an elastic component disposed on the impact vibration seat; the impact hammer is driven upward by the piston rod During movement, the elastic component is compressed and stored for energy; when the impact hammer moves downward under the drive of the piston rod, the elastic force of the elastic component pushes the impact hammer to move downward. Specifically, the elastic member may be a compression spring, so that when the impact hammer moves downward, the initial velocity of the impact hammer can be increased, because the reaction speed of the rebound of the compression spring is greater than the reaction speed of the reversing of the piston rod, Get more impact.

In one embodiment, the reversing mechanism may include a valve body with an inner cavity sealed and a valve core with one end disposed in the cavity of the valve body and rotatable; the valve body is provided with a first connection connecting the hydraulic cylinder. A working oil port and a second working oil port, the valve core is provided with an oil inlet pipeline and an oil return pipeline connected to the hydraulic station; The oil outlet of the second working oil port, the oil return pipeline includes at least one oil inlet that can communicate with the second working oil port or the first working oil port; the valve core is in a rotating circle At least two working positions evenly distributed on the circumference are preset; when the valve core rotates to the first working position, the oil outlet communicates with the second working oil port, and the oil inlet communicates with the first working position. a working oil port; when the valve core rotates to the second working position, the oil outlet is connected to the first working oil port, and the oil inlet is connected to the second working oil port; wherein, the first working oil port The first working position and the second working position are adjacent working positions in the circumferential direction of the valve core. In this way, through the cooperation of the valve body and the valve core, and driven by a power device such as a motor, the hydraulic oil entering the hydraulic cylinder can be quickly reversed to ensure the working efficiency of the pile hammer machine. It can be understood that the reversing mechanism may also be an electromagnetic reversing valve, but the reversing frequency of the electromagnetic reversing valve is relatively low.

In one embodiment, both the first working oil port and the second working oil port can be opened on the outer circumference of the valve and are axially aligned; the outer circumference of the valve core is provided with two Around the entire spool circumference, the radial position corresponds to the connection area of the first working oil port and the second working oil port, and each of the connection areas is provided with the oil outlet and the oil inlet. A ring of oil ports in which the ports are alternately arranged, the oil ports in the two connecting regions are axially aligned, and the two axially aligned oil ports are of different types. In this way, when the valve core rotates for one week, the hydraulic oil entering the hydraulic cylinder can change its direction several times, so as to ensure the higher working efficiency of the pile hammer machine. It can be understood that it is also feasible to provide fewer oil outlet ports and oil inlet ports. For example, the first working oil port and the second working oil port are symmetrically opened on the outer circumference of the valve body, and the oil outlet port It is also set corresponding to the oil inlet, so that when the spool rotates once, the hydraulic oil entering the hydraulic cylinder changes its direction only once.

In one embodiment, the valve core may be provided with an annular groove surrounding the entire outer circumference of the valve core on the outer circular surface between the two connection regions, and the oil outlet is the opening of the connection region and the outer surface of the valve core. The annular groove is a U-shaped groove in axial communication; the valve core is also provided with a central hole that extends axially and has the same axis as that of the valve core, and the oil inlet is a hole opened in the connection area in the direction of the central hole. The first through hole that communicates with each other; the U-shaped groove and the central hole are not communicated in the radial direction, and the first through hole and the annular groove are not communicated in the axial direction; the oil inlet pipeline is from the annular groove From the beginning of the groove, after passing through the U-shaped groove, it flows into the pipeline passing through the first working oil port or the second working oil port; the oil return pipeline is from the first working oil port or the second From the working oil port, after passing through the first through hole and the central hole, it flows to the oil return pipeline of the hydraulic station; the valve body is also provided with a first connection connecting the hydraulic station and the annular groove An oil port and a second connection oil port connecting the hydraulic station and the central hole, the valve core is provided with a second through hole which is matched with the second connection oil port and communicated with the central hole. In this way, the structure of the entire oil inlet pipeline and oil return pipeline is relatively simple, and it can be understood that other structures can also be provided, for example, each oil inlet or oil return port is connected to the hydraulic station through a hose, so that the spool and valve The body structure is more complex. It should be noted that the center hole here is not the "process hole used to determine the center of the workpiece" in the usual machining process, but a hole consistent with the axis of the valve core for accommodating hydraulic oil.

In an embodiment, the valve core may further be provided with two annular grooves at both ends of the valve body cavity, one of the two annular grooves is provided with the second through hole, and the other is provided with the second through hole. A third through hole communicated with the central hole is opened. Through the second through hole and the third through hole, the hydraulic oil of the hydraulic station can fill the entire cavity formed by the valve body and the valve core, so as to ensure the oil in the oil outlet or the oil inlet. Will not leak to both sides.

In one embodiment, the reversing mechanism may further include a motor for driving the valve core to rotate, one end of the valve core is located in the cavity of the valve body, and the other end of the valve core passes through the valve The body is connected with the output shaft of the motor. The spool is driven to rotate by a motor, and the rotating speed is high, the structure is simple, and the control is convenient. It will be appreciated that other power components are also possible, such as hydraulic motors and the like.

In one embodiment, the motor may be a variable frequency motor. In this way, the rotational speed of the motor can be easily adjusted, so that the pile hammer machine can produce different impact forces and vibrations and adapt to different soil qualities. It can be understood that no speed regulation will not affect normal work.

In one embodiment, the valve body may also be provided with a valve core sleeve, and the valve core sleeve is provided with accommodating spaces with openings at both ends; the valve core is inserted through one end of the valve body cavity at the In the accommodating space, the valve core and the valve core sleeve are provided with a sealing structure at the connection between the two ends; the outer wall of the valve core sleeve is fixed to the valve body cavity. This design of separating the valve body and the valve core sleeve can ensure the machining accuracy of the valve core sleeve and better ensure that the hydraulic oil will not leak.

In one embodiment, the sealing structure may be a labyrinth-type sealing structure. Since the valve core rotates at high speed during operation, the sealing structure also needs to be adapted. Of course, there are many other sealing structures that can also adapt to the high-speed rotation of the shaft, which will not be described in detail.

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

1 is a schematic diagram of a hydraulic linear impact vibration pile hammer machine according to an embodiment of the present invention. As shown in FIG. 1 , the pile hammer machine includes an impact vibration base 11 , a hydraulic cylinder 12 for applying impact and vibration to the impact vibration base 11 , The hydraulic station 13 that drives the hydraulic cylinder 12 and the reversing mechanism that changes the direction of the hydraulic oil entering the hydraulic cylinder 12 at a preset frequency; the hydraulic cylinder 12 includes a cylinder block 121 and a piston rod 122, the cylinder block 121 is fixed on the shock vibration seat 11, and the piston rod 122 is fixed with an impact hammer 15; the impact hammer 15 exerts an impact on the shock vibration seat 11 when the piston rod 122 moves, and the cylinder 121 is When the piston rod 122 moves, vibration is applied to the shock vibration seat 11 .

In this embodiment, below the shock vibration seat 11 is a pile body 19 , and the shock vibration seat 11 and the pile body 19 are fixed by a hydraulic clamp 20 . The reversing mechanism is connected with the hydraulic station and the hydraulic cylinder through a rubber hose 21 .

In this embodiment, as shown in FIGS. 2 and 3 , the bottom end of the cylinder 121 is fixed to the top of the shock vibration seat 11 by screws, so that the vibration of the cylinder 121 can be directly transmitted to the shock vibration Block 11.

In this embodiment, the piston rod 122 is disposed above the hydraulic cylinder 12, and the movement direction is the vertical direction; the impact hammer 15 includes a fixed part 151 and an impact part 152, the fixed part 151 and the The piston rod 122 is fixed, and the impact portion 152 extends from above the cylinder block 121 to the impact vibration seat 11 along the periphery of the cylinder block 121 . Since the piston rod 122 is arranged above the hydraulic cylinder 12, according to the hydraulic principle, it can be known from the hydraulic principle: because the area of the piston with the rod cavity above is small, the downward speed is greater, that is, the downward stroke is greater than the upward stroke, and each time it goes down, The impact hammer 15 will hit the impact vibration seat 11 , therefore, when the piston rod 122 moves downward, the impact hammer 15 is driven to impact the impact vibration seat 11 .

In this embodiment, the fixing part 151 is fixed with the piston rod 122 by screws; the fixing part 151 and the impact part 152 are also fixed by screws. It can be understood that the fixing part 151 and the impact part 152 can be one.

In this embodiment, in order to further increase the impact force and vibration of the pile hammer machine, the pile hammer machine is further provided with an impact strengthening mechanism, and the impact strengthening mechanism includes an elastic component arranged on the impact vibration seat; this embodiment In the example, the elastic component is a compression spring 111, and six of the compression springs 111 are evenly arranged around the entire impact hammer, and the impact strengthening mechanism further includes a spring fixing column 112, a spring compression ring 113 and a spring fixing cap 114. The spring fixing column 112 is fixed on the shock vibration seat 11, the inner end of the spring compression ring 113 is sleeved and fixed on the impact hammer 15, and the outer end is sleeved on the spring fixing column 112, and can be The impact hammer 15 slides up and down along the spring fixing column 112 ; the compression spring 111 is sleeved on the spring fixing column 112 , and the bottom of the compression spring 111 abuts against the spring compression ring 113 ; The spring fixing cap 114 is sleeved on the top of the spring fixing column 112 to prevent the compression spring 111 from coming out of the spring fixing column 112 . In this way, when the impact hammer 15 moves upwards driven by the piston rod 122, the elastic component is compressed and stored energy; when the impact hammer 15 moves downwards driven by the piston rod 122, the The elastic force of the elastic member pushes the impact hammer 15 to move downward. Specifically, the compression spring 111 may be a butterfly spring.

In this embodiment, as shown in FIGS. 1 and 4 , the reversing mechanism includes a valve body 16 , a valve core 17 and a motor 18 ; one end of the valve core 17 is located in the inner cavity of the valve body 16 , and the other end passes through the valve body 16 . The valve body 16 is connected with the output shaft of the motor 18 . The valve core 17 is the main body for changing the direction of hydraulic oil, and the valve body 16 is used to accommodate the valve core. In order that the oil entering and leaving the valve core 17 will not lose energy due to leakage, the valve body 16 accommodates The cavity of the valve core is sealed to the outside. The motor 18 is used to drive the valve core 17 to rotate, and is driven by the motor 18, and has the characteristics of high rotational speed, simple structure and convenient control. In this embodiment, the other end of the valve core 17 is connected with the output shaft of the motor 18 through a coupling.

In this embodiment, as shown in FIG. 4 , in order to ensure the sealing of the valve body 16 more easily, the valve body 16 is further provided with a valve core sleeve 161 , and the valve core sleeve 161 is provided with an accommodating space with openings at both ends; The valve core 17 is inserted through the accommodating space at one end of the inner cavity of the valve body 16, and the valve core 17 and the valve core sleeve 161 are provided with a labyrinth seal structure 171 at the connection between the two ends, that is, at the end of the valve body 16. The outer surface of the valve core is machined with a plurality of annular grooves in a zigzag shape; such a sealing structure can adapt to the high-speed rotation of the valve core 17 during operation; the outer wall of the valve core sleeve 161 is fixed to the inner cavity of the valve body 16 , specifically fixed by screws 162 .

In this embodiment, in order to make the valve core 17 rotate at a high speed in the valve core sleeve 161, both ends of the valve core sleeve 161 are provided with rolling bearings 168, and both ends of the valve core are provided with the rolling bearings 168 mating journal.

In this embodiment, as shown in FIGS. 4 and 5 , the valve body 16 is provided with a first working oil port 163 and a second working oil port 164 which are connected to the hydraulic cylinder 12 . Both the working oil port 163 and the second working oil port 164 are opened on the outer circumference of the valve body 16 and are axially aligned;

As shown in FIGS. 4 and 6 , the outer circumference of the valve core 17 is provided with two surrounding the entire circumference of the valve core 17 and the radial positions corresponding to the first working oil port 163 and the second working oil port 164 respectively Each of the connection areas includes an oil outlet and an oil inlet, the number of which is four, and the oil outlet and the oil inlet are alternately arranged on the circumference, Aligned in all directions, that is, the oil ports have eight rows in the circumferential direction and two columns in the axial direction;

During operation, the initial working position of the valve core is equivalent to the above-mentioned first working position, the first working oil port 163 and the second working oil port 164 are respectively aligned with the oil ports of the two connecting areas, and all the The types of oil ports in which the first working oil port 163 and the second working oil port 164 are aligned are different, that is, one of the working oil ports is aligned with the oil outlet port, and the other working oil port can only be aligned with the oil inlet port. form a loop. When the valve core rotates by one-eighth of a circle, which is equivalent to the above-mentioned second working position, the oil ports aligned with the first working oil port 163 and the second working oil port 164 are exchanged, and the hydraulic oil entering the hydraulic cylinder is The direction is changed, ie the direction of movement of the piston rod of the hydraulic cylinder is changed.

In this embodiment, as shown in FIGS. 6 and 7 , the outer surface of the valve core 17 between the two connection regions is provided with an annular groove 173 surrounding the entire outer surface of the valve core 17 , and the oil outlet is A U-shaped groove 174 axially communicated with the annular groove 173 is opened in the connecting area; the valve core 17 is also provided with a central hole 175 extending axially and having the same axis as that of the valve core 17. The oil inlet A first through hole 176 radially communicated with the central hole 175 opened for the connecting region; the U-shaped groove 174 is not in radial communication with the central hole 175, and the first through hole 176 is connected to the central hole 175 in the radial direction. The annular groove 173 is not communicated in the axial direction; in this way, from the annular groove 173, after passing through the U-shaped groove 174, it enters the pipeline through which the first working oil port 163 or the second working oil port 164 passes. It constitutes an oil inlet pipeline; it starts from the first working oil port 163 or the second working oil port 164, passes through the first through hole 176 and the central hole 175, and finally flows to the oil return pipeline of the hydraulic station 13 The valve body 16 is also provided with a first connecting oil port 165 connecting the hydraulic station 13 and the annular groove 173 and a second connecting oil connecting the hydraulic station 13 and the central hole 175 Port 166 , the valve core 17 is provided with a second through hole 177 which is matched with the second connecting oil port 166 and communicates with the central hole 175 .

In this embodiment, the valve core 17 is further 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 is provided with the second through hole 177 . A third through hole 178 communicated with the central hole 175 is opened. Through the second through hole 177 and the third through hole 178, the hydraulic oil of the hydraulic station 13 can fill the entire cavity formed by the valve body 16 and the valve core 17 to ensure that the oil outlet or the The oil in the oil inlet will not leak to both sides.

In this embodiment, in order to facilitate the processing of the center hole, one end of the center hole penetrates one end of the valve core. As shown in Figures 4 and 6, the left end of the center hole is penetrated. In order to avoid oil leakage, A plug 179 is installed on the left end. In order to facilitate the processing of the U-shaped groove 174 and the first through hole 176 and facilitate the entry and exit of hydraulic oil, as shown in FIG. 7 , the cross-sectional shape of the U-shaped groove 174 is a trapezoid, and the first through hole 176 faces toward There is also a trumpet hole with a trapezoidal cross-sectional shape.

In this embodiment, as shown in FIG. 8 , the valve core sleeve 161 is provided to cooperate with the first working oil port 163 , the second working oil port 164 , the first connecting oil port 165 and the second connecting oil port 166 The through hole is formed, so that both the hydraulic oil provided by the hydraulic station 13 and the hydraulic oil returned by the hydraulic cylinder 12 can smoothly pass through the valve core.

In this embodiment, the motor 18 is a variable frequency motor. In this way, the rotational speed of the motor 18 can be easily adjusted, so that the pile hammer machine can generate different impact forces and vibrations and adapt to different soil qualities.

The above are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the within the protection scope of the present invention.

Claims (9)

1. The hydraulic linear impact vibration pile hammer is characterized by comprising an impact vibration seat, a hydraulic cylinder, a hydraulic station and a reversing mechanism, wherein the hydraulic cylinder applies impact and vibration to the impact vibration seat;

the hydraulic cylinder comprises a cylinder body and a piston rod, the cylinder body is directly or indirectly fixed on the impact vibration seat, and an impact hammer is fixed on the piston rod; the impact hammer applies impact to the impact vibration seat when the piston rod moves, and the cylinder body applies vibration to the impact vibration seat when the piston rod moves;

the piston rod is arranged above the hydraulic cylinder, and the moving direction is vertical; the bottom end of the cylinder body is fixed at the top end of the impact vibration seat; the impact hammer comprises a fixing part and an impact part, the fixing part is fixed with the piston rod, and the impact part extends to the impact vibration seat from the upper part of the cylinder body along the periphery of the cylinder body; when the piston rod moves, the impact hammer is driven to move, and impact is applied to the impact vibration seat.

2. The hydraulic linear impact vibratory pile hammer machine of claim 1, further provided with an impact reinforcement mechanism comprising a resilient member disposed on said impact vibratory seat; when the impact hammer moves upwards under the driving of the piston rod, the elastic component is compressed to store energy; when the impact hammer moves downwards under the driving of the piston rod, the elastic force of the elastic component pushes the impact hammer to move downwards.

3. The hydraulic linear impact vibrohammer machine according to claim 1, characterized by that, the reversing mechanism comprises a valve body with a sealed inner cavity and a valve core with one end arranged in the inner cavity of the valve body and capable of rotating; the valve body is provided with a first working oil port and a second working oil port which are connected with the hydraulic cylinder, and the valve core is provided with an oil inlet pipeline and an oil return pipeline which are connected with the hydraulic station; the oil inlet pipeline comprises at least one oil outlet which can be communicated with the first working oil port or the second working oil port, and the oil return pipeline comprises at least one oil inlet which can be communicated with the second working oil port or the first working oil port;

the valve core is preset with at least two working positions uniformly distributed on the circumference in a rotating circumference; when the valve core rotates to a first working position, the oil outlet is communicated with the second working oil port, and the oil inlet is communicated with the first working oil port; when the valve core rotates to a second working position, the oil outlet is communicated with the first working oil port, and the oil inlet is communicated with the second working oil port; wherein the first operating position and the second operating position are adjacent operating positions in the circumferential direction of the valve element.

4. The hydraulic linear impact vibrohammer machine according to claim 3, characterized in that the first working oil port and the second working oil port are both open on the outer circumference of the valve body and are axially aligned; the outer circumference of the valve core is provided with two connecting areas which surround the circumference of the whole valve core and have radial positions corresponding to the first working oil port and the second working oil port respectively, each connecting area is provided with a circle of oil ports which are alternately arranged by the oil outlet and the oil inlet, the two oil ports in the connecting areas are aligned in the axial direction, and the types of the two oil ports aligned in the axial direction are different.

5. The hydraulic linear impact vibrohammer machine according to claim 4, characterized in that the outer circumferential surface of the valve core between the two connection areas is provided with an annular groove surrounding the outer circumferential surface of the whole valve core, and the oil outlet is a U-shaped groove provided in the connection areas and axially communicating with the annular groove; the valve core is also provided with a central hole which extends axially and has the axis consistent with that of the valve core, and the oil inlet is a first through hole which is formed in the connecting area and is communicated with the central hole in the radial direction; the U-shaped groove is not communicated with the central hole in the radial direction, and the first through hole is not communicated with the annular groove in the axial direction;

the oil inlet pipeline is a pipeline which flows into the first working oil port or the second working oil port from the annular groove after passing through the U-shaped groove; the oil return pipeline is a pipeline which starts from the first working oil port or the second working oil port, passes through the first through hole and the central hole and then flows to the hydraulic station for returning oil; the valve body is further provided with a first connecting oil port for communicating the hydraulic station with the annular groove and a second connecting oil port for communicating the hydraulic station with the central hole, and the valve core is provided with a second through hole which is matched with the second connecting oil port and communicated with the central hole.

6. The hydraulic linear impact vibrohammer machine according to claim 5, characterized in that the valve core is further provided with two annular grooves at both ends of the valve body cavity, one of the two annular grooves is provided with the second through hole, and the other is provided with a third through hole communicated with the central hole.

7. The hydraulic linear impact vibrohammer machine according to claim 3, characterized in that the reversing mechanism further comprises a motor driving the valve core to rotate, one end of the valve core is located in the valve body cavity, and the other end of the valve core penetrates out of the valve body and is connected with an output shaft of the motor; the motor is a variable frequency motor.

8. The hydraulic linear impact vibrohammer machine according to claim 7, characterized in that the valve body is further provided with a valve core sleeve provided with an accommodation space with two open ends; one end of the valve core in the inner cavity of the valve body penetrates through the accommodating space, and a sealing structure is arranged at the joint of the valve core and the valve core sleeve at the two ends; the outer wall of the valve core sleeve is fixed in the inner cavity of the valve body.

9. The hydraulic linear impact vibrohammer machine according to claim 8, characterized in that the sealing structure is a labyrinth-type sealing structure.

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