CN111577703A - Hydraulic driving device of hydraulic pile hammer - Google Patents

Hydraulic driving device of hydraulic pile hammer Download PDF

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Publication number
CN111577703A
CN111577703A CN202010466975.9A CN202010466975A CN111577703A CN 111577703 A CN111577703 A CN 111577703A CN 202010466975 A CN202010466975 A CN 202010466975A CN 111577703 A CN111577703 A CN 111577703A
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CN
China
Prior art keywords
hydraulic
piston
cylinder
oil
valve body
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
CN202010466975.9A
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Chinese (zh)
Inventor
林登
林永安
贾敏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yongan Machinery Co ltd
Original Assignee
Yongan Machinery Co ltd
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 Yongan Machinery Co ltd filed Critical Yongan Machinery Co ltd
Priority to CN202010466975.9A priority Critical patent/CN111577703A/en
Publication of CN111577703A publication Critical patent/CN111577703A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • 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
    • E02D7/02—Placing by driving
    • E02D7/06—Power-driven drivers
    • 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1428—Cylinders
    • 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1438—Cylinder to end cap assemblies
    • F15B15/1442—End cap sealings
    • 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1476—Special return means
    • 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/149—Fluid interconnections, e.g. fluid connectors, passages

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Actuator (AREA)

Abstract

The invention relates to engineering machinery, in particular to a hydraulic driving device of a hydraulic pile driving hammer. The technical scheme is as follows: the utility model provides a hydraulic drive device of hydraulic pile hammer, including the hydraulic cylinder body, the axial both ends of hydraulic cylinder body are equipped with cylinder cap and valve body respectively, be equipped with piston and piston rod in the hydraulic cylinder body, the oil inlet has been seted up on the hydraulic cylinder body, the internal cover of hydraulic cylinder is equipped with the piston cylinder, piston and piston rod are in this piston cylinder, the space between hydraulic cylinder body and this piston cylinder is hydraulic oil return oil space, it promotes chamber and drive chamber to have in the piston cylinder, the oil inlet switches on with hydraulic oil return oil space, it is equipped with and promotes chamber oil feed passageway to promote chamber department, be equipped with the passageway that makes hydraulic oil return oil space and drive chamber switch on and make the return channel in the hydraulic. Adopt above-mentioned technical scheme, provide a hydraulic drive arrangement of hydraulic pile hammer convenient to maintenance, increase logical area of staying of hydraulic oil, sealed stable, prevent revealing.

Description

Hydraulic driving device of hydraulic pile hammer
Technical Field
The invention relates to engineering machinery, in particular to a hydraulic driving device of a hydraulic pile driving hammer.
Background
The hydraulic pile hammer is an impact pile driving machine, which mainly strikes a pile body in a free-falling mode, and after a preset height is lifted through a hydraulic system, acceleration energy is obtained from the hydraulic system to improve the impact speed to strike the pile body.
The hydraulic driving source for lifting the acceleration of the hydraulic system is a hydraulic cylinder body, one axial end of the hydraulic cylinder body is provided with a cylinder cover, the other axial end of the hydraulic cylinder body is provided with a switching valve, a piston which reciprocates along the axial direction of the hydraulic cylinder body and piston rods which are respectively arranged at two axial ends of the piston are arranged in the hydraulic cylinder body, the piston rods at the two ends can respectively penetrate through the cylinder cover and the switching valve and extend out of the hydraulic cylinder body, the spaces of the hydraulic cylinder body at the two axial ends of the piston are respectively a lifting cavity for promoting the piston to lift towards the upper part of the hydraulic cylinder body and a driving cavity for promoting the piston to quickly impact towards the lower part of the hydraulic cylinder body, the hydraulic cylinder body is provided with at least three oil inlets which are communicated with the lifting cavity or the driving cavity, the two axial ends of each oil return pipe.
The arrangement of the three oil return pipes in the hydraulic cylinder body promotes the oil return to have at least six upper and lower sealing points, the sealing of the sealing points needs to be ensured respectively, otherwise, the risk of oil leakage can occur. The through area of the hydraulic oil is small, and the temperature of the hydraulic oil is easy to rise when the hydraulic oil is in a high-pressure state. And when hydraulic cylinder damaged, need wholly dismantle and implement the change.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the hydraulic driving device of the hydraulic pile hammer, which is convenient to maintain, increases the through area of hydraulic oil, is stable in sealing and prevents leakage.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a hydraulic drive device of hydraulic pile hammer, including the hydraulic cylinder body, the axial both ends of hydraulic cylinder body are equipped with cylinder cap and valve body respectively, are equipped with the piston in the hydraulic cylinder body and locate the piston rod at piston axial both ends respectively, and the piston rod at both ends can run through cylinder cap and valve body respectively and extend to outside the hydraulic cylinder body, has seted up oil inlet, its characterized in that on the hydraulic cylinder body: the hydraulic cylinder body in the cover be equipped with the cylinder that axial both ends respectively with the cylinder cap at hydraulic cylinder body axial both ends and valve body sealing connection, piston and piston rod be in this piston cylinder to can follow the axial reciprocating motion of piston cylinder, the space between hydraulic cylinder body and this piston cylinder is hydraulic oil return space, the space that the piston cylinder is located the axial both ends of piston is for making the piston towards the promotion chamber that piston cylinder upper portion promoted and making the drive chamber that the piston is strikeed towards piston cylinder lower part fast respectively, the oil inlet switch on with this hydraulic oil return space, promotion chamber department is equipped with the promotion chamber oil feed passageway that switches on with hydraulic oil return space, the valve body that is located drive chamber department on be equipped with the passageway that makes hydraulic oil return space and drive chamber switch on and make the return channel in the hydraulic oil backward flow to outside oil tank of.
By adopting the technical scheme, the piston cylinder for mounting the piston is arranged in the hydraulic cylinder body, and the space between the piston cylinder and the hydraulic cylinder body forms the hydraulic oil return space, so that the oil return path is integrated in the hydraulic cylinder body, sealing points generated by three traditional oil return pipes are reduced, the oil leakage probability is reduced, and the sealing performance is further guaranteed. The through area of a hydraulic oil return space formed between the piston cylinder and the hydraulic cylinder body can prevent the temperature of hydraulic oil from rising due to high pressure; and when the piston cylinder damages, only need to change the piston cylinder both can, easy dismounting.
The invention is further configured to: the oil inlet channels of the lifting cavity are a plurality of through holes uniformly distributed on the piston cylinder.
Adopt above-mentioned technical scheme, set up like this and can accelerate the oil feed speed that promotes the chamber to shorten the lifting time of piston cylinder internal piston, make the preparation time of pile hammer shorten, indirect quickening work efficiency.
The invention is further arranged as follows: the valve body middle part is equipped with the mounting hole, is equipped with in the mounting hole and can dismantle the oil blanket lid of being connected with the valve body, and the oil blanket is covered and is offered the mounting hole that supplies the piston rod to run through, is equipped with the sealing member between oil blanket lid and the piston rod, dismouting filling space has between the inner wall of valve body mounting hole and the inner wall of piston cylinder, and the internal diameter of valve body mounting hole is greater than the internal diameter of piston cylinder inner wall.
By adopting the technical scheme, when the piston and the piston rod are in failure and need to be dismantled. Because the valve body is provided with a plurality of channels, if the oil sealing cover is directly removed, when the piston is pulled out from the mounting hole of the valve body, the sealing element on the piston can expand into the channel of the valve body to be damaged. Therefore, after the oil seal cover is removed, the inner wall of the oil seal cover is inserted into the mounting hole of the valve body to be attached to the mounting hole of the piston body in the assembling and disassembling filling space, the outer wall of the oil seal cover and the inner wall of the piston cylinder are located on the same plane, the sleeve shields the channel on the valve body, and when the piston is removed, the sealing element on the piston cannot be damaged.
The invention is further arranged as follows: the cylinder cap passes through the fastener and is connected with hydraulic cylinder body, is equipped with down the oil blanket lid in the cylinder cap, is equipped with the sealing member between lower oil blanket lid and the cylinder cap, sets up the installation through-hole that supplies the piston rod to run through on the oil blanket lid down, is equipped with the sealing member between installation through-hole and the piston rod, lower oil blanket lid have the arch towards the one end of piston cylinder, have the location space that supplies the cylinder wall grafting location of piston cylinder between bellied outer peripheral face and the lower cylinder cap.
By adopting the technical scheme, the structure is simple, and the sealing performance is stable.
The invention is further described below with reference to the accompanying drawings.
Drawings
FIG. 1 is a perspective view of an embodiment of the present invention;
FIG. 2 is a schematic sectional view taken along line A-A of FIG. 1;
FIG. 3 is an enlarged view of section I of FIG. 2;
FIG. 4 is a schematic structural diagram of a valve body according to an embodiment of the present invention;
FIG. 5 is a schematic view of the piston when it cannot be removed in the embodiment of the present invention;
fig. 6 is an enlarged view of section II of fig. 5.
Detailed Description
As shown in fig. 1-6, a hydraulic driving device of a hydraulic pile hammer includes a hydraulic cylinder body 1, two axial ends of the hydraulic cylinder body 1 are respectively provided with a cylinder cover 2 and a valve body 3, the hydraulic cylinder body 1 is internally provided with a piston 4 and piston rods 41 respectively arranged at two axial ends of the piston 4, the piston rods 41 at two ends can respectively penetrate through the cylinder cover 2 and the valve body 3 and extend to the outside of the hydraulic cylinder body 1, the hydraulic cylinder body 1 is provided with an oil inlet 11, the hydraulic cylinder body 1 is internally sleeved with a piston cylinder 5, two axial ends of which are respectively connected with the cylinder cover 2 and the valve body 3 at two axial ends of the hydraulic cylinder body 1 in a sealing manner, the piston 4 and the piston rod 41 are located in the piston cylinder 5 and can move back and forth along the axial direction of the piston cylinder 5, a space between the hydraulic cylinder body 1 and the piston cylinder 5 is a hydraulic oil return space 12, and spaces at two axial ends of the piston cylinder 5 are respectively a lifting cavity 51 for The oil inlet 11 of the movable cavity 52 is communicated with the hydraulic oil return space 12, the lifting cavity 51 is provided with a lifting cavity oil inlet channel 511 communicated with the hydraulic oil return space 12, and the valve body 3 positioned at the driving cavity 52 is provided with a channel 31 for promoting the communication between the hydraulic oil return space 12 and the driving cavity 52 and a return channel 32 for promoting the hydraulic oil in the driving cavity 52 to return to an external oil tank. In the scheme, the piston cylinder 5 for installing the piston 4 is arranged in the hydraulic cylinder body 1, and the space between the piston cylinder 5 and the hydraulic cylinder body 1 forms the hydraulic oil return space 12, so that an oil return path is integrated in the hydraulic cylinder body 1, sealing points generated by three traditional oil return pipes are reduced, the oil leakage probability is reduced, and the sealing performance is further guaranteed. The through area of the hydraulic oil return space 12 formed between the piston cylinder 5 and the hydraulic cylinder body 1 can prevent the temperature rise of the hydraulic oil due to high pressure; and when the piston cylinder 5 damages, only need to change the piston cylinder 5 both, easy dismounting.
When the oil pump extracts the hydraulic oil in the oil tank and enters the hydraulic oil return space 12 through the oil inlet 11 on the hydraulic cylinder body 1, the hydraulic oil enters the lifting cavity 51 through the lifting cavity oil inlet channel 511 on the piston cylinder 5 and collides with the piston 4, the piston 4 is lifted towards the upper part of the hydraulic cylinder body 1, and at the moment, a part of the hydraulic oil enters the driving cavity 52 through the hydraulic oil return space 12 and the channel 31 on the valve body 3; after the piston 4 is lifted to a certain height, the pressure of hydraulic oil in the driving cavity 52 is greater than the pressure of hydraulic oil in the lifting cavity 51, so that the hydraulic oil in the lifting cavity 51 gradually enters the hydraulic oil return space 12 through the lifting cavity oil inlet channel 511, and then the hydraulic oil in the hydraulic oil return space 12 continuously compensates the driving cavity 52 through the channel 31 of the valve body 3, so that the piston 4 rapidly moves towards the lower part of the hydraulic cylinder body 1, the impact speed and the impact force of the piston 4 are improved, and the acceleration energy provided by the piston to the pile body can further improve the impact speed.
In the embodiment of the present invention, in order to accelerate the oil inlet speed of the lift cavity 51, thereby shortening the lifting time of the piston 4 in the piston cylinder 5, shortening the preparation time of the pile hammer, and indirectly accelerating the working efficiency, the lift cavity oil inlet channels 511 are a plurality of through holes uniformly distributed on the piston cylinder 5.
In the embodiment of the invention, when the piston 4 or the piston cylinder 5 needs to be replaced, the disassembly and assembly time is shortened and the disassembly and assembly processes are reduced. The middle part of the valve body 3 is provided with a mounting hole 33, an oil seal cover 34 detachably connected with the valve body 3 is arranged in the mounting hole 33, a mounting hole 341 through which the piston rod 41 penetrates is formed in the oil seal cover 34, a sealing element is arranged between the oil seal cover 34 and the piston rod 41, a dismounting and filling space 35 is formed between the inner wall of the mounting hole 33 of the valve body 3 and the inner wall of the piston cylinder 5, and the inner diameter of the mounting hole 33 of the valve body 3 is larger than that of the inner wall of the piston cylinder. Due to the plurality of passages 31 in the valve body 3, if the piston 4 is pulled out from the mounting hole 33 of the valve body 3 by directly removing the oil seal cover 34, the sealing member on the piston 4 can expand into the passages 31 of the valve body 3 and be damaged. Therefore, after the oil seal cover 34 is removed, the sleeve 6 with the inner wall attached to the mounting hole 33 of the valve body 3 and the outer wall in the same plane as the inner wall of the piston cylinder 5 is inserted into the detachable filling space 35, and the sleeve 6 shields the passage 31 of the valve body 3, so that the seal on the piston 4 is not damaged when the piston is removed.
In the embodiment of the invention, the cylinder cover 2 is connected with the hydraulic cylinder body 1 through a fastener, the fastener is a fastening bolt, a lower oil seal cover 7 is arranged in the cylinder cover 2, a sealing element is arranged between the lower oil seal cover 7 and the cylinder cover 2, an installation through hole 71 for the piston rod 41 to penetrate through is formed in the lower oil seal cover 7, the sealing element is arranged between the installation through hole 71 and the piston rod 41, a protrusion 72 is arranged at one end, facing the piston cylinder 5, of the lower oil seal cover 7, and a positioning space 73 for inserting and positioning the cylinder wall of the piston cylinder 5 is formed between the outer peripheral surface of. It should be noted that the sealing member may be a sealing ring.

Claims (5)

1. The utility model provides a hydraulic drive device of hydraulic pile hammer, including the hydraulic cylinder body, the axial both ends of hydraulic cylinder body are equipped with cylinder cap and valve body respectively, are equipped with the piston in the hydraulic cylinder body and locate the piston rod at piston axial both ends respectively, and the piston rod at both ends can run through cylinder cap and valve body respectively and extend to outside the hydraulic cylinder body, has seted up oil inlet, its characterized in that on the hydraulic cylinder body: the hydraulic cylinder body in the cover be equipped with the cylinder that axial both ends respectively with the cylinder cap at hydraulic cylinder body axial both ends and valve body sealing connection, piston and piston rod be in this piston cylinder to can follow the axial reciprocating motion of piston cylinder, the space between hydraulic cylinder body and this piston cylinder is hydraulic oil return space, the space that the piston cylinder is located the axial both ends of piston is for making the piston towards the promotion chamber that piston cylinder upper portion promoted and making the drive chamber that the piston is strikeed towards piston cylinder lower part fast respectively, the oil inlet switch on with this hydraulic oil return space, promotion chamber department is equipped with the promotion chamber oil feed passageway that switches on with hydraulic oil return space, the valve body that is located drive chamber department on be equipped with the passageway that makes hydraulic oil return space and drive chamber switch on and make the return channel in the hydraulic oil backward flow to outside oil tank of.
2. The hydraulic drive of the hydraulic pile hammer as set forth in claim 1, wherein: the oil inlet channel of the lifting cavity is a plurality of through holes uniformly distributed on the piston cylinder.
3. The hydraulic drive device of the hydraulic pile driving hammer as set forth in claim 1 or 2, characterized in that: the valve body middle part be equipped with the mounting hole, be equipped with in the mounting hole and can dismantle the oil blanket lid of being connected with the valve body, set up the mounting hole that supplies the piston rod to run through on the oil blanket lid, be equipped with the sealing member between oil blanket lid and the piston rod, dismouting filling space has between the inner wall of valve body mounting hole and the inner wall of piston cylinder, and the internal diameter of valve body mounting hole is greater than the internal diameter of piston cylinder inner wall.
4. The hydraulic drive device of the hydraulic pile driving hammer as set forth in claim 1 or 2, characterized in that: the cylinder cover pass through the fastener and be connected with hydraulic cylinder body, be equipped with down the oil blanket lid in the cylinder cover, be equipped with the sealing member between lower oil blanket lid and the cylinder cover, set up the installation through-hole that supplies the piston rod to run through on the oil blanket lid down, be equipped with the sealing member between installation through-hole and the piston rod, lower oil blanket lid one end towards the piston cylinder have the arch, have the location space that supplies the cylinder wall grafting location of piston cylinder between bellied outer peripheral face and the cylinder cover.
5. The hydraulic drive of the hydraulic pile hammer as set forth in claim 3, wherein: the valve body middle part be equipped with the mounting hole, be equipped with in the mounting hole and can dismantle the oil blanket lid of being connected with the valve body, set up the mounting hole that supplies the piston rod to run through on the oil blanket lid, be equipped with the sealing member between oil blanket lid and the piston rod, dismouting filling space has between the inner wall of valve body mounting hole and the inner wall of piston cylinder, and the internal diameter of valve body mounting hole is greater than the internal diameter of piston cylinder inner wall.
CN202010466975.9A 2020-05-28 2020-05-28 Hydraulic driving device of hydraulic pile hammer Pending CN111577703A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010466975.9A CN111577703A (en) 2020-05-28 2020-05-28 Hydraulic driving device of hydraulic pile hammer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010466975.9A CN111577703A (en) 2020-05-28 2020-05-28 Hydraulic driving device of hydraulic pile hammer

Publications (1)

Publication Number Publication Date
CN111577703A true CN111577703A (en) 2020-08-25

Family

ID=72119635

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010466975.9A Pending CN111577703A (en) 2020-05-28 2020-05-28 Hydraulic driving device of hydraulic pile hammer

Country Status (1)

Country Link
CN (1) CN111577703A (en)

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