KR100973147B1 - Hydraulic circuit of a pile drive - Google Patents

Hydraulic circuit of a pile drive

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Publication number
KR100973147B1
KR100973147B1 KR1020080049448A KR20080049448A KR100973147B1 KR 100973147 B1 KR100973147 B1 KR 100973147B1 KR 1020080049448 A KR1020080049448 A KR 1020080049448A KR 20080049448 A KR20080049448 A KR 20080049448A KR 100973147 B1 KR100973147 B1 KR 100973147B1
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KR
South Korea
Prior art keywords
hydraulic
pressure
ram
hydraulic cylinder
solenoid valve
Prior art date
Application number
KR1020080049448A
Other languages
Korean (ko)
Other versions
KR20090123390A (en
Inventor
김홍권
Original Assignee
김홍권
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 김홍권 filed Critical 김홍권
Priority to KR1020080049448A priority Critical patent/KR100973147B1/en
Priority to PCT/KR2008/003364 priority patent/WO2009145381A1/en
Publication of KR20090123390A publication Critical patent/KR20090123390A/en
Application granted granted Critical
Publication of KR100973147B1 publication Critical patent/KR100973147B1/en

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2217—Hydraulic or pneumatic drives with energy recovery arrangements, e.g. using accumulators, flywheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/20—Means for actuating or controlling masts, platforms, or forks
    • B66F9/22—Hydraulic devices or systems
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • E02F9/2225—Control of flow rate; Load sensing arrangements using pressure-compensating valves
    • E02F9/2228—Control of flow rate; Load sensing arrangements using pressure-compensating valves including an electronic controller
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2278—Hydraulic circuits
    • E02F9/2296—Systems with a variable displacement pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/024—Installations or systems with accumulators used as a supplementary power source, e.g. to store energy in idle periods to balance pump load
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20546—Type of pump variable capacity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/21—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge
    • F15B2211/212—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge the pressure sources being accumulators

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)

Abstract

The present invention is to move the piston rod equipped with the ram configured in the hydraulic cylinder up and down by storing the high pressure hydraulic pressure generated from the hydraulic pump in the hydraulic cylinder or the high and low pressure accumulator through the control of the solenoid valve according to the operation of the controller. A hydraulic rudder for driving a manifold box unit configured to supply a hydraulic pressure of a hydraulic pump to a hydraulic cylinder or return to a hydraulic oil tank by controlling a first solenoid valve that controls a first logic valve according to an operation of the controller. And a second solenoid valve configured with a second logic valve for supplying the hydraulic pressure introduced through the supply line of the manifold box part to the hydraulic cylinder or the high pressure accumulator, and the piston rod being moved up and down and stored in the hydraulic cylinder. Even if the hydraulic pressure stored in the hydraulic pressure and low pressure accumulator is circulated The sensor part consists of a third solenoid valve configured with a third logic valve, a limit sensor installed at the highest point where the ram of the raised piston rod is located, and an impact sensor installed at the lowest point of the ram of the lowered piston rod. When the limit sensor is operated by the ram, it is characterized in that the operation of the hydraulic cylinder is stopped, the pressure accumulated in the high-pressure accumulator is lowered inside the hydraulic cylinder when the impact sensor is operated by the ram is lowered It provides a hydraulic circuit of anti-taking, characterized in that the piston rod mounted with the ram is raised by the pressure accumulated in the high-pressure accumulator without the operation of the hydraulic pump.

In addition, according to the hydraulic circuit of the navigator according to the present invention, it is possible not only to perform the normal operation of the navigator as it is, and to freely stop the striking operation of the navigator by a predetermined time by a timer. It can easily measure the behavior of the pile or the condition and change of the ground generated when the strike, and there is an advantage that can be applied to the application method using the measured data on the surrounding ground.

Hydraulic, Driving, Timer, Stop, Accumulator

Description

HYDRAULIC CIRCUIT OF A PILE DRIVE}

The present invention relates to a hydraulic circuit of a navigator, and more particularly, it is possible not only to perform a normal operation of the navigator as it is, but also to stop the hitting operation of the navigator by a timer for a predetermined time, so that sound waves and the like can be stopped. It can be easily measured the behavior of the pile or the condition and change of the ground generated by hitting, using the data on the surrounding ground measured in this way was invented to apply the application method.

In general, a rudder is a device that strikes the ground by using a file, and is used by being attached to a crane or an excavator, and is mainly divided into a diesel chamber and a hydraulic type.

In recent years, the environmentally friendly hydraulic type is mainly used because the diesel type is a major cause of environmental pollution due to the explosion sound and soot.

Hereinafter, the hydraulic circuit of the driving machine will be described with reference to the registered patent.

1 is a diagram showing a main part of a hydraulic circuit of a conventional cruiser, and FIG. 2 is a circuit diagram of a stopped state of a hydraulic circuit of a conventional cruiser.

The hydraulic circuit of the conventional cruiser has a high pressure accumulator 181 for storing high pressure generated from the hydraulic pump 140 and a low pressure accumulator 181 for storing low pressure at a position separated from the high pressure accumulator 180 and the high pressure accumulator 180. And a hydraulic cylinder (190) for vertically moving the piston rod (194) on which the ram (200) is mounted in accordance with the setting of the hydraulic line supplied to the low pressure accumulator (181). 180 and the low pressure accumulator 181 to the high pressure passage 176, the low pressure passage 172 and the hydraulic cylinder 190 so that the passage is controlled by the first logic valve 160 and the second logic valve 161, respectively. It is installed in communication, but characterized in that it is installed on the logic manifold 170 having a cylinder block (173) on the outside, according to the hydraulic circuit of the conventional anti-driven as described above, the high pressure accumulator 180 and low pressure accumulator Is coupled mechanically by the data 181 and the hydraulic cylinder 190 is a logic manifold 170 is presented here, the overall performance and reliability improved, so the circuit is simplified and allows the internal pressure is increased.

In addition, since the pipeline between the circuits is short and blocked, the response speed of the circuit is fast and the operating time of the RAM 200 can be shortened, thereby improving workability and efficiency.

However, when using the hydraulic circuit of the conventional cruiser as described above, since there was no means to restart the operation of the ram for a certain time, it was not possible to use other than the general blow, especially the sound wave test is impossible The state of the ground and the behavior of the file could not be inspected, and thus there was a problem in that efficient work could not be achieved.

An object of the present invention is not only to perform the normal operation of the navigator as it is, the behavior of the file generated when hitting by using sound waves by allowing the stop operation of the navigator freely by a predetermined time by a timer B, it is possible to easily measure the condition and change of the ground, and to provide a hydraulic circuit of the navigator to apply the application method using the measured data on the surrounding ground as described above.

The hydraulic circuit of the anti-taking device of the present invention for achieving the above object is to control the first solenoid valve to control the first logic valve in accordance with the operation of the controller to supply the hydraulic pressure of the hydraulic pump into the hydraulic cylinder, or to the hydraulic oil tank A second solenoid valve configured with a manifold box portion configured to return, a second logic valve configured to supply hydraulic pressure flowing through the supply line of the manifold box portion to a hydraulic cylinder or a high pressure accumulator, and the piston rod up and down The third solenoid valve including the third logic valve configured to circulate the hydraulic pressure stored in the hydraulic cylinder and the hydraulic pressure stored in the low pressure accumulator, and the limit sensor and the downward movement installed at the highest point where the ram of the raised piston rod is located. It consists of an impact sensor installed at the lowest point where the ram of the piston rod is located When the limit sensor is operated by the ram, it is characterized in that the operation of the hydraulic cylinder is stopped, and the pressure accumulated in the high pressure accumulator is lowered by the ram, the impact of the hydraulic cylinder when the impact sensor is operated It is characterized in that the piston rod mounted on the ram rises by the pressure accumulated in the high pressure accumulator without being operated by the lower inner portion and operated by the hydraulic pump.

According to the hydraulic circuit of the navigator according to the present invention, it is possible not only to perform the normal operation of the navigator as it is, but also to stop the striking operation of the navigator by a predetermined time by a timer. It is a useful invention that can easily measure the behavior of the generated file, the condition and the change of the ground, and apply the application method using the measured data on the surrounding ground.

Hereinafter, the structure of the present invention will be described.

The hydraulic circuit of the anti-ride motor of the present invention stores the high-pressure hydraulic pressure generated from the hydraulic pump through the control of the solenoid valve according to the operation of the controller in the hydraulic cylinder or by storing the ram mounted in the hydraulic cylinder by storing the high-pressure accumulator in the hydraulic cylinder. The hydraulic circuit diagram of the hydraulic driving device for moving the rod up and down, the control of the first solenoid valve 12 to control the first logic valve 11 in accordance with the operation of the controller (C) of the hydraulic pump (P) Hydraulic pressure is supplied to the hydraulic cylinder (S) or the manifold box portion 10 configured to return to the hydraulic oil tank (T), and the hydraulic pressure flowing through the supply line of the manifold box portion 10 hydraulic cylinder. (S) the second solenoid valve 20 having the second logic valve 22 configured to be supplied to the internal or high pressure accumulator 21 and the piston rod 32 by moving up and down in the hydraulic chamber. The third solenoid valve 30 having a third logic valve 34 configured to circulate the hydraulic pressure stored in the S and the hydraulic pressure stored in the low pressure accumulator 33, and the ram of the piston rod 32 which has been moved upward ( 31 is composed of a sensor unit 40 consisting of a limit sensor 41 is installed at the highest point where the impact sensor 42 is installed at the lowest point where the ram 31 of the piston rod 32 is moved downward and When the limit sensor 41 is operated by the ram 31, the hydraulic pump P is stopped and at the same time the piston rod 32 on which the ram 31 is mounted is stopped.

In addition, the supply line of the manifold box portion 10 is characterized in that the high pressure accumulator 21 is pressure accumulating only until reaching a predetermined pressure, and then further comprises a pressure switch 15 for blocking the supply of hydraulic pressure There is this.

In addition, the manifold box 10 has an orifice for returning the hydraulic pressure to the hydraulic oil tank T by bypassing the first logic valve 11 when the pressure of the hydraulic pressure generated from the hydraulic pump P reaches a predetermined value. 16) and a bypass line in which the relief valve 17 is installed is further characterized.

In addition, the first logic valve 11 controlled by the first solenoid valve 12 is characterized by consisting of 1: 1 logic control valve.

In addition, the pressure accumulated in the high-pressure accumulator 21 is transferred to the lower inner side of the hydraulic cylinder (S) when the ram 31 is lowered and the impact sensor 42 is operated without the operation of the hydraulic pump (P) ( 31 is mounted, the piston rod 32 is characterized in that it is increased by the pressure accumulated in the high-pressure accumulator 21.

In addition, the limit sensor 41 is connected to the timer that can be set to set the time, the piston rod 32 is stopped and restarted automatically only during the time set in the timer during the operation of the limit sensor 41 There is a characteristic.

In addition, the second solenoid valve 20 is characterized in that the opening is later than the first solenoid valve 12 so that the pressure supply of the hydraulic pump (P) can be made properly.

Hereinafter will be described in more detail with reference to the drawings the operating state of the hydraulic circuit of the cruiser of the present invention.

First, Figure 3 is a circuit diagram showing when the hydraulic pump is operated in a neutral state.

At this time, since the ram 31 is in a stopped state, there is no hydraulic pressure in the high pressure accumulator 21 and the low pressure accumulator 33, and the first solenoid valve 12 is in a state where no voltage is applied to the first solenoid valve 12. ) Becomes neutral.

Therefore, the hydraulic pilot passage of the first solenoid valve 12 is connected to the PA port and the BT port. Accordingly, the first logic valve 11 having a ratio of 1: 1 is opened to be generated from the hydraulic pump P. The hydraulic pressure is not directed to the hydraulic cylinder (S), the operation is made to return to the hydraulic oil tank (T) through the open first logical valve (11).

Next, FIG. 4 is a circuit diagram showing a state in which the ram first moves up under the control of the first and second solenoid valves.

At this time, when the controller C is operated to raise the ram 31, power is applied to the first solenoid valve 12 so that the hydraulic pilot passage of the first solenoid valve 12 is connected to the PB port and the AT port. Accordingly, the first logic valve 11 is closed by the pressure of the spring.

Therefore, the hydraulic pressure not passing through the first logic valve 11 passes through the supply logic valve 13 configured in the supply line, and is then directed in the direction of the high pressure accumulator 21 and the second solenoid valve 20.

Then, the high pressure accumulator 21 acts to accumulate the supplied hydraulic pressure, and after a predetermined time, the second solenoid valve 20 is operated by the control of the controller C to operate the hydraulic pressure of the second solenoid valve 20. The pilot path is connected to the PB port and the AT port.

When the second solenoid valve 20 is operated as described above, the hydraulic pressure for closing the second logic valve 22 no longer flows through the PA port so that the second logic valve 22 is opened, thereby increasing the high pressure accumulator. After the hydraulic pressure accumulated at 21 passes through the second logic valve 22, the hydraulic pressure is stored in the lower side of the hydraulic cylinder S.

Therefore, the piston rod 32 equipped with the ram 31 constituted in the hydraulic cylinder S acts to ascend, and the hydraulic oil in the upper side of the hydraulic cylinder S moves to the upward stroke of the piston rod 32. Due to the pressure accumulating in the low pressure accumulator 33, a portion of the flow rate is returned to the hydraulic oil tank (T) after passing through the return logic valve (14).

Here, the opening timing of the second solenoid valve 20 may be the same as the opening timing of the first solenoid valve 12, but the failure due to the smooth operation of the hydraulic pump P and the operation of the hydraulic pump P. It is preferable to have a dwell time for opening the second solenoid valve 20 later than the first solenoid valve 12 so as to prevent this.

When the pressure of the hydraulic pressure generated from the hydraulic pump P becomes large, the hydraulic pressure is supplied to the hydraulic oil through the bypass line provided with the orifice O and the relief valve R bypassing the first logic valve 11. It is possible to return to (T), thereby increasing the safety of hydraulic navigation.

5 is a circuit diagram explaining the operation of accumulating all the hydraulic pressure in the high pressure accumulator after the ram is completed.

When the piston rod 32 on which the ram 31 is mounted is positioned at the highest point by the above-described action, when the limit sensor 41 detects the ram 31, the second solenoid valve 20 The power applied to the power supply is cut off so that the hydraulic pilot port of the second solenoid valve 20 is converted from the PB port and the AT port to the PA port and the BT port, thereby closing the second logic valve 22.

Therefore, all the hydraulic pressure generated from the hydraulic pump (P) is accumulated in the high pressure accumulator 21, when the pressure in the high pressure accumulator 21 is accumulated to a predetermined pressure or more, the pressure switch 15 configured in the supply line is operated It acts to block the supply of hydraulic pressure.

In the present invention, when the limit sensor 41 detects the ram 31 and stops the upward stroke of the piston rod 32, the operation of the hydraulic cylinder S is stopped, which is the pile 1 of the ground GL. This is to measure the behavior of the pile (1) using the sound waves and the change of the state of the ground (GL) without disturbing the impact sound generated when hitting the), such as the static state of the hydraulic cylinder (S) Can be manually restarted by manipulating the controller (C).

In addition, when the timer (not shown) that can be set to the limit sensor 41 is connected to the interlock operation, the operation of the hydraulic cylinder (S) can be stopped and automatically restarted only during the time set in the timer. As a result, it is not only convenient to use for testing, such as sonic test, but also shortens the timer time setting and can be used like a normal hydraulic helm.

Next, Figure 6 is a circuit diagram showing a state in which the operation of the hydraulic helm stopped in the state where the ram is located at the highest point.

When a predetermined pressure is accumulated in the high pressure accumulator 21 as described above, the pressure switch 15 is automatically activated by the pressure to stop the operation of the hydraulic pump (P) while stopping the supply of hydraulic pressure, such a state As described above, since the timer lasts until the set time of the timer or the controller C is manually operated, the measurement can be easily performed using a sound wave in a quiet state.

In addition, FIG. 7 is a circuit diagram illustrating a state in which the impact sensor senses the ram by completing the set time elapse of the timer or the operation of lowering the hydraulic cylinder through the operation of the controller.

In order to lower the hydraulic cylinder S as described above, power must be applied to the third solenoid valve 30 according to the control of the controller C, and the hydraulic pilot port of the third solenoid valve 30 to which power is applied. Is converted from the PB port and the AT port to the PA port and the BT port, thereby opening the third logic valve 34.

Then, when the power is supplied to the third solenoid valve 30, the pressure stored in the low pressure accumulator 33 is transmitted to the upper side of the hydraulic cylinder S so that the lower stroke of the piston rod 32 on which the ram 31 is mounted is applied. In this case, the hydraulic oil stored in the lower side of the hydraulic cylinder (S) is transmitted to the upper side of the hydraulic cylinder (S) through the third logic valve 34 in accordance with the lower stroke of the piston rod (32) to the piston rod (32). ) To help the downstroke, and some hydraulic fluid is returned to the hydraulic oil tank (T) through the return logic valve (14).

In addition, when the above operation is continuously performed and the ram 31 reaches the lowest point, the ram 31 hits the drive cap D to type the pile 1 on the ground GL and simultaneously impact it. The sensor 42 is configured to detect the ram 31.

Next, FIG. 8 is a circuit diagram showing a state in which the ram is automatically raised by the pressure of the accumulated high-pressure accumulator.

When the ram 31 is lowered and the impact sensor 42 is operated as described above, the hydraulic pressure accumulated in the high pressure accumulator 21 is transmitted to the lower side of the hydraulic cylinder S, so that the piston rod on which the ram 31 is mounted ( 32) is automatically raised by a certain height.

After that, as shown in FIG. 4, the hydraulic pump P is restarted and power is sequentially applied to the first and second solenoid valves 12 and 20 so that hydraulic pressure is transferred to the lower side of the hydraulic cylinder S. As a result, the upstroke is completed.

As described above, the present invention provides a circuit diagram of a hydraulic helm which is repeatedly repeated in the order of rising the ram, accumulating the high pressure accumulator, stopping the ram, lowering the ram, and rising the ram. Because it can be stopped for a certain time according to convenience, it is easy to measure using sound waves without external obstacles, and thus it is easy to find out the behavior of the file, the state of the ground (GL) or the change of state. Various application methods can be applied.

In addition, although the above-described embodiment has been described with respect to an embodiment of the present invention, it is not limited to the above embodiment, and various modifications are possible within the scope without departing from the technical spirit of the present invention. It is evident to those of ordinary knowledge in Esau.

1 is a main unit showing a hydraulic circuit of a conventional cruiser

2 is a circuit diagram of a stationary state of a conventional hydraulic circuit

Figure 3 is a neutral state circuit diagram of the hydraulic circuit of the driving machine of the present invention.

4 is a circuit diagram of a state in which the ram of the hydraulic circuit of the driving machine of the present invention rises.

5 is a circuit diagram of a state in which the high-pressure accumulator of the hydraulic circuit of the driving machine of the present invention is accumulated.

6 is a circuit diagram of a stationary state of the hydraulic circuit of the driving machine of the present invention.

Figure 7 is a circuit diagram of the ram down state of the hydraulic circuit of the driving machine of the present invention.

8 is a circuit diagram of a state rising to a certain height by the high-pressure accumulator of the hydraulic circuit of the driving machine of the present invention.

DESCRIPTION OF REFERENCE NUMERALS

1: file C: controller

D: Drive cap P: Hydraulic pump

S: Hydraulic cylinder T: Hydraulic oil tank

GL: Ground 10: Manifold box part

11: first solenoid valve 12: first logic valve

13: supply logic valve 14: return logic valve

15 pressure switch 16 orifice

17: relief valve 20: second solenoid valve

21: high pressure accumulator 22: second logic valve

30: third solenoid valve 31: ram

32: piston rod 33: low pressure accumulator

34: third logic valve 40: sensor

41: limit sensor 42: impact sensor

Claims (7)

Hydraulic navigator moves up and down the piston rod equipped with ram configured in the hydraulic cylinder by storing the high pressure hydraulic pressure generated from the hydraulic pump in the hydraulic cylinder or the high and low pressure accumulator through the control of the solenoid valve according to the operation of the controller. To By operating the controller C, the first solenoid valve 12 controlling the first logic valve 11 is controlled to supply the hydraulic pressure of the hydraulic pump P into the hydraulic cylinder S or the hydraulic oil tank ( A manifold box portion 10 configured to return to T); A second solenoid valve 20 having a second logic valve 22 configured to supply the hydraulic pressure introduced through the supply line of the manifold box part 10 to the hydraulic cylinder S or to the high pressure accumulator 21; A third solenoid valve 30 having a third logic valve 34 configured to circulate the piston rod 32 up and down so that the hydraulic pressure stored in the hydraulic cylinder S and the hydraulic pressure stored in the low pressure accumulator 33 are circulated; The limit sensor 41 is installed at the highest point where the ram 31 of the raised piston rod 32 is located and the impact sensor 42 is installed at the lowest point where the ram 31 of the piston rod 32 which has been lowered is positioned. It consists of a sensor unit 40 consisting of), when the limit sensor 41 is operated by the ram 31 is characterized in that the operation of the hydraulic cylinder (S) is stopped, When the pressure accumulated in the high pressure accumulator 21 is lowered by the ram 31 and the impact sensor 42 is operated, the pressure is transferred to the lower inner side of the hydraulic cylinder S so that the ram 31 is operated without the operation of the hydraulic pump P. Hydraulic circuit of claim 1, characterized in that the mounted piston rod (32) to rise by the pressure accumulated in the high-pressure accumulator (21). The supply line of the manifold box part 10 further includes a pressure switch 15 for accumulating the pressure until the high pressure accumulator 21 reaches a predetermined pressure, and then shuts off the supply of hydraulic pressure. Hydraulic circuit of anti-taking, which is characterized by being configured. According to claim 1, When the pressure of the hydraulic pressure generated from the hydraulic pump (P) reaches a predetermined value in the manifold box portion 10, the hydraulic pressure bypasses the first logic valve 11 to the hydraulic oil tank (T) Hydraulic circuit of anti-taking, characterized in that the bypass line is further provided with a revolving orifice (16) and a relief valve (17). 4. The hydraulic circuit of claim 1 or 3, wherein the first logic valve (11) controlled by the first solenoid valve (12) comprises a 1: 1 logic control valve. delete According to claim 1, wherein the limit sensor 41 is connected to the timer is set to be installed, the operation of the hydraulic cylinder (S) is automatically stopped only during the time set in the timer during the operation of the limit sensor 41 Hydraulic circuit of a cruiser, characterized in that it is to be reactivated. The hydraulic circuit of claim 1, wherein the second solenoid valve (20) is opened later than the first solenoid valve (12) so that the pressure supply of the hydraulic pump (P) can be performed properly.
KR1020080049448A 2008-05-28 2008-05-28 Hydraulic circuit of a pile drive KR100973147B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020080049448A KR100973147B1 (en) 2008-05-28 2008-05-28 Hydraulic circuit of a pile drive
PCT/KR2008/003364 WO2009145381A1 (en) 2008-05-28 2008-06-14 Hydraulic circuit of pile driver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020080049448A KR100973147B1 (en) 2008-05-28 2008-05-28 Hydraulic circuit of a pile drive

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KR20090123390A KR20090123390A (en) 2009-12-02
KR100973147B1 true KR100973147B1 (en) 2010-07-30

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WO (1) WO2009145381A1 (en)

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