CN111237294A - Hydraulic system of walking pile driver - Google Patents
Hydraulic system of walking pile driver Download PDFInfo
- Publication number
- CN111237294A CN111237294A CN202010027679.9A CN202010027679A CN111237294A CN 111237294 A CN111237294 A CN 111237294A CN 202010027679 A CN202010027679 A CN 202010027679A CN 111237294 A CN111237294 A CN 111237294A
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- Prior art keywords
- valve
- motor
- port
- oil
- hydraulic system
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Classifications
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- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
- F15B21/087—Control strategy, e.g. with block diagram
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
- E02D7/02—Placing by driving
- E02D7/06—Power-driven drivers
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- 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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- 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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/0401—Valve members; Fluid interconnections therefor
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- 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
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
-
- 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
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
- F15B20/008—Valve failure
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Analytical Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Earth Drilling (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The invention discloses a hydraulic system of a walking pile driver, which comprises a main winch, an electric proportional variable pump, a motor, a first oil way, a second oil way, a multi-way valve and an auxiliary pump, wherein the main winch is connected with the main winch through a first oil way; the motor is used for driving the main winch to ascend and descend, and the electric proportional variable pump is respectively connected with a first port and a second port of the motor through a first oil path and a second oil path; the multi-way valve comprises a first valve bank and a second valve bank, and the first valve bank, the motor, the first oil way, the second oil way and the electric proportional variable pump form a closed system; the auxiliary pump is connected with the multi-way valve, and the auxiliary pump, the second valve bank and the motor form an open system. The open system and the closed system can be switched, the construction efficiency is improved when the closed system controls the main winch, the ascending and descending speed of the main winch is improved through control, the construction time when the drilling tool is not sprayed with grout is shortened, the ascending and descending precision of the main winch is provided, and the open system can be switched to pull out the drilling tool when the drilling tool is buried.
Description
Technical Field
The invention relates to the technical field of crawler-type pile drivers, in particular to a hydraulic system of a crawler-type pile driver.
Background
At present, with the increase of the number of the three-shaft walking pile drivers in the market, the production efficiency is improved, the energy consumption loss is reduced, and the competitiveness of equipment is enhanced by the use safety of the equipment.
The lifting and lowering speeds of the main winch cannot be accurately controlled by adopting the existing hydraulic system; in the construction process, if a hydraulic system of the existing product has component faults, such as a pump and a multi-way valve, the lifting or descending of a main winch cannot be controlled, the situation that the drilling tool is buried, such as long maintenance time, cement solidification and incapability of pulling out the drilling tool, is caused, and the whole drilling tool is buried in the ground, so that the construction quality is influenced and the drilling tool is damaged.
Disclosure of Invention
In view of the above-mentioned deficiencies of the prior art, the present invention provides a hydraulic system for a walking pile driver, which aims to solve the problems that the lifting and lowering speeds of a main winch cannot be accurately controlled and a drilling tool cannot be pulled out when a component of the hydraulic system fails in the prior art.
The technical scheme adopted by the invention for solving the technical problems is a hydraulic system of a walking pile driver, which comprises:
main hoisting;
an electric proportional variable pump;
a motor; the motor is used for driving the ascending and descending of the main winch and comprises a first port and a second port;
the electric proportional variable pump is respectively connected with a first port and a second port of the motor through the first oil path and the second oil path;
the multi-way valve comprises a first valve bank and a second valve bank, wherein two ends of the first valve bank are respectively connected with a first port and a second port of the motor, and the first valve bank, the motor, a first oil way, a second oil way and the electric proportional variable pump form a closed system; two ends of the second valve group are respectively connected with a first port and a second port of the motor;
and the auxiliary pump is connected with the multi-way valve, and the auxiliary pump, the second valve bank and the motor form an open system.
Preferably, the closed system further comprises a gear pump for replenishing oil to the motor, and the gear pump is connected with the first oil path and the second oil path.
Preferably, the closed system further comprises an overflow valve connected with the gear pump.
Preferably, a first electromagnetic valve is arranged in the first oil path, a second electromagnetic valve is arranged in the second oil path, and the first electromagnetic valve and the second electromagnetic valve are matched to control the forward rotation, the reverse rotation and the stop of the motor.
Preferably, the first solenoid valve and the second solenoid valve are both two-position two-way valves.
Preferably, two ends of the second valve group are respectively connected with a quick connector; and two ends of the second valve group are respectively connected with the first end and the second end of the motor through quick connectors.
Preferably, two ends of the first valve group are respectively connected with a check valve, and two ends of the first valve group are respectively connected with the first port and the second port through the check valves.
The walking type pile driver hydraulic system disclosed by the invention has the advantages that the open system and the closed system can be switched, the construction efficiency is improved when the closed system is used for controlling the main winch, the ascending and descending speed of the main winch is improved through control, the construction time during non-guniting is shortened, the ascending and descending precision of the main winch is provided, and the open system can be switched to pull out a drilling tool under the condition that the drilling tool is buried.
Drawings
FIG. 1 is a schematic connection diagram of a hydraulic system in an embodiment.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
Referring to fig. 1, the present invention discloses a hydraulic system for a walking pile driver, which includes a main winch, an electric proportional variable pump 100, a motor 200, a first oil path 300, a second oil path 400, a multi-way valve 500, and an auxiliary pump 600.
The motor 200 is used for driving the ascending and descending of the main winch, and the motor 200 comprises a first port 210 and a second port 220;
the electric proportional variable displacement pump 100 is connected to the first port 210 and the second port 220 of the motor 200 through a first oil passage 300 and a second oil passage 400, respectively;
the multi-way valve 500 comprises a first valve group 510 and a second valve group 520, two ends of the first valve group 510 are respectively connected with the first port 210 and the second port 220 of the motor 200, and the first valve group 510, the motor 200, the first oil path 300, the second oil path 400 and the electric proportional variable pump 100 form a closed system; two ends of the second valve group 520 are respectively connected with the first port 210 and the second port 220 of the motor 200;
the auxiliary pump 600 is connected to the multi-way valve 500, and the auxiliary pump 600, the second valve set 520, and the motor 200 form an open system.
In the prior art, an open system or a load sensitive system is adopted when the main winch is controlled to ascend and descend. The open system consists of an electric proportional variable pump 100, a first electromagnetic valve 310, a second electromagnetic valve 410 and a motor 200, the pressure loss through the valve and the pipeline reaches 30bar, the pressure output by the pump in the hydraulic system during normal work is 120-180bar, the energy consumption loss reaches 16.7 percent by calculation with 180bar, if the working pressure of the open system is 120bar, the energy consumption loss is 25 percent, namely 16.7 to 25 percent of the energy consumption for the hydraulic system is lost in a reversing valve and the pipeline; the pressure loss of the load-sensitive system passing through the multi-way valve 500 is 40-50bar, and the energy consumption loss is larger. And a closed system is introduced, so that the energy consumption loss in the use process of the equipment is reduced.
In a closed system, the electric proportional variable pump 100 is directly connected with the motor 200, and the electric proportional variable pump 100 and the motor 200 are both high-pressure pumps, and the rated working pressure can be set at 350 bar. The pressure loss in the hydraulic circuit is smaller, and the energy consumption loss can be reduced when the main winch is controlled to lift.
The closed system adopts the electric proportional variable pump 100, realizes the accurate control of the hoisting and lowering speed of the winch, improves the construction quality, and can be used for high-pressure jet grouting piles and other types of projects.
When the slurry is not sprayed, the oil supply amount to the main winch can be increased through the auxiliary pump 600, the operating speed of the motor 200 is increased, the speed of the main winch is increased, and the extra oil in the closed system is discharged out of the closed system through the overflow valve 800.
The electric proportional variable pump 100 and the motor 200 adjust the displacement through electric control proportion, and the displacement of the electric proportional variable pump 100 can be adjusted from the positive maximum displacement to the negative maximum displacement without pole adjustment; the displacement of the motor 200 is adjusted steplessly from maximum to minimum.
The closed system further comprises a gear pump 700 for supplementing oil to the motor 200, wherein the gear pump 700 is connected with the first oil path 300 and the second oil path 400.
The closed system further comprises an overflow valve 800, the overflow valve 800 is connected with the gear pump 700, and when the closed system controls the main winch to ascend and descend, excess hydraulic oil in the closed system is discharged out of the system through the overflow valve 800.
The first oil passage 300 is provided with a first solenoid valve 310, the second oil passage 400 is provided with a second solenoid valve 410, and the first solenoid valve 310 and the second solenoid valve 410 cooperate to control the normal rotation, the reverse rotation, and the stop of the motor 200.
The first solenoid valve 310 and the second solenoid valve 410 are two-position two-way valves.
In this embodiment, the first solenoid valve 310 and the second solenoid valve 410 are large-diameter directional valves, and when the closed system controls the lifting of the main winch, the flow resistance loss in the closed system is small.
When the first electromagnetic valve 310 and the second electromagnetic valve 410 are switched on, the displacement of the electric proportional variable pump 100 is adjusted to control the positive and negative rotation or stop of the motor 200, so as to drive the main winch to ascend, descend or stop, and simultaneously, the ascending and descending speed of the winch can be controlled.
The electric proportional variable pump 100 is directly connected with two ends of the motor 200 through the first electromagnetic valve 310 and the second electromagnetic valve 410 respectively, the first electromagnetic valve 310 and the second electromagnetic valve 410 are both large-diameter valves, the closed system can improve the working pressure, shorten the length of a pipeline in a loop, reduce the pressure loss in the pipeline and reduce the energy consumption loss in the pipeline.
Two ends of the second valve set 520 are respectively connected with a quick connector 900; two ends of the second valve set 520 are respectively connected to the first end and the second end of the motor 200 through quick connectors 900.
Two ends of the first valve set 510 are respectively connected with a check valve 1000, and two ends of the first valve set 510 are respectively connected with the first port 210 and the second port 220 through the check valve 1000.
In this example, the closed system and the open system are switchable, when the electric proportional variable pump 100, the gear pump 700 or the overflow valve 800 has a fault, the first solenoid valve 310 and the second solenoid valve 410 are switched off, the multi-way valve 500 is operated, the quick coupling 900 is switched on, the auxiliary pump 600, the multi-way valve 500 and the motor 200 form the open system, the main winch is controlled to work, the normal construction is ensured, and the drilling tool can be safely and completely lifted out.
The walking type pile driver hydraulic system disclosed by the invention has the advantages that the open system and the closed system can be switched, the construction efficiency is improved when the closed system is used for controlling the main winch, the ascending and descending speed of the main winch is improved through control, the construction time during non-guniting is shortened, the ascending and descending precision of the main winch is provided, and the open system can be switched to pull out a drilling tool under the condition that the drilling tool is buried.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (7)
1. A hydraulic system of a walking pile driver, comprising:
main hoisting;
an electric proportional variable pump;
a motor; the motor is used for driving the ascending and descending of the main winch and comprises a first port and a second port;
the electric proportional variable pump is respectively connected with a first port and a second port of the motor through the first oil path and the second oil path;
the multi-way valve comprises a first valve bank and a second valve bank, wherein two ends of the first valve bank are respectively connected with a first port and a second port of the motor, and the first valve bank, the motor, a first oil way, a second oil way and the electric proportional variable pump form a closed system; two ends of the second valve group are respectively connected with a first port and a second port of the motor;
and the auxiliary pump is connected with the multi-way valve, and the auxiliary pump, the second valve bank and the motor form an open system.
2. The hydraulic system of the walking pile driver as recited in claim 1, wherein the closed system further comprises a gear pump for replenishing oil to the motor, the gear pump being connected to the first and second oil passages.
3. A hydraulic system for a walking pile driver as recited in claim 2, wherein the closed system further comprises an overflow valve connected to the gear pump.
4. The hydraulic system of a walking pile driver as recited in any one of claims 1-3, wherein a first solenoid valve is disposed in the first oil passage, a second solenoid valve is disposed in the second oil passage, and the first solenoid valve and the second solenoid valve cooperate to control the forward rotation, the reverse rotation, and the stop of the motor.
5. The hydraulic system of a walking pile driver as recited in claim 4, wherein the first and second solenoid valves are two-position, two-way valves.
6. The hydraulic system of a walking pile driver as recited in claim 1, wherein the two ends of the second valve set are respectively connected with a quick coupling; and two ends of the second valve group are respectively connected with the first end and the second end of the motor through quick connectors.
7. The hydraulic system of a walking pile driver as recited in claim 1, wherein two ends of the first valve set are connected with check valves respectively, and two ends of the first valve set are connected with the first port and the second port through the check valves respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010027679.9A CN111237294B (en) | 2020-01-10 | 2020-01-10 | Hydraulic system of walking pile driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010027679.9A CN111237294B (en) | 2020-01-10 | 2020-01-10 | Hydraulic system of walking pile driver |
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| CN111237294A true CN111237294A (en) | 2020-06-05 |
| CN111237294B CN111237294B (en) | 2021-10-19 |
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| CN202010027679.9A Active CN111237294B (en) | 2020-01-10 | 2020-01-10 | Hydraulic system of walking pile driver |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112324752A (en) * | 2020-11-17 | 2021-02-05 | 中航通飞华南飞机工业有限公司 | Airplane hydraulic energy switching redundancy protection method and system |
| CN115306782A (en) * | 2022-10-12 | 2022-11-08 | 临工重机股份有限公司 | Hydraulic control system of pile driver and pile driver |
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| CN115306782A (en) * | 2022-10-12 | 2022-11-08 | 临工重机股份有限公司 | Hydraulic control system of pile driver and pile driver |
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| Publication number | Publication date |
|---|---|
| CN111237294B (en) | 2021-10-19 |
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