CN108675197B - Hydraulic pump station of hydraulic jack driving mechanical self-locking protection device - Google Patents

Hydraulic pump station of hydraulic jack driving mechanical self-locking protection device Download PDF

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Publication number
CN108675197B
CN108675197B CN201810456636.5A CN201810456636A CN108675197B CN 108675197 B CN108675197 B CN 108675197B CN 201810456636 A CN201810456636 A CN 201810456636A CN 108675197 B CN108675197 B CN 108675197B
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China
Prior art keywords
valve
pressure
oil
oil tank
jack
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Active
Application number
CN201810456636.5A
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Chinese (zh)
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CN108675197A (en
Inventor
李然
覃祥孝
陈明华
陶然
袁练
刘应
汤伟毕
黄文权
朱旺峰
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Three Gorges Navigation Authority
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Three Gorges Navigation Authority
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Priority to CN201810456636.5A priority Critical patent/CN108675197B/en
Publication of CN108675197A publication Critical patent/CN108675197A/en
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    • 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
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
    • B66F3/25—Constructional features
    • B66F3/42—Constructional features with self-contained pumps, e.g. actuated by hand
    • 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
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
    • B66F3/25—Constructional features
    • 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
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
    • 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
    • F15B13/01—Locking-valves or other detent i.e. load-holding devices
    • 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
    • F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • 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
    • B66F2700/00—Lifting apparatus
    • B66F2700/05—Hydraulic jacks
    • 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
    • F15B2211/205—Systems with pumps
    • F15B2211/20576—Systems with pumps with multiple pumps
    • 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
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • 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
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Structural Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

The invention discloses a hydraulic pump station of a hydraulic jack driving a mechanical self-locking protection device, which comprises an oil tank, wherein a servo motor pump set, a proportional valve set and an electric cabinet are arranged at the top of the oil tank; the servo motor pump set comprises a servo motor, a high-pressure plunger pump and a damping ring; the servo motor is installed at the top of the oil tank, the high-pressure plunger pump is installed inside the oil tank, the servo motor is connected with the high-pressure plunger pump through a flange, a motor shaft is connected with a shaft coupling for the oil pump, a damping ring is additionally arranged between the servo motor and the high-pressure plunger pump, the output end of the high-pressure plunger pump is connected with the proportional valve group through a pipeline, the proportional valve group is connected with an oil cylinder of a hydraulic jack with a mechanical self-locking protection device, and the control box is located on the side portion of the oil tank. The matching of the hydraulic jack with the mechanical self-locking protection device and the electromagnetic stop valve realizes the long-time support of the jack with load at any position, and the pressure compensation valve is arranged, so that the pressure loss is greatly reduced, and the heat productivity of the system is also greatly reduced.

Description

Hydraulic pump station of hydraulic jack driving mechanical self-locking protection device
Technical Field
The invention relates to a hydraulic pump station of a hydraulic jack driving a mechanical self-locking protection device, belonging to the technical field of hydraulic pressure.
Background
The hydraulic pump station is a power source of a hydraulic jack with a mechanical self-locking protection device, when the hydraulic jack is in lifting operation, the position of a piston rod of the jack is driven and controlled in real time, the hydraulic pump station is a hydraulic device mainly composed of an oil tank, a motor, a hydraulic pump, a valve piece and the like, and the hydraulic pump station is connected with the oil cylinder through an oil pipe, so that the action and the working cycle specified by the piston rod can be realized.
However, the hydraulic pump station of the hydraulic jack with the mechanical self-locking protection device in the prior art cannot support in a load manner for a long time, and the safety performance of the system is poor; the oil supply quantity of the jack is adjusted by adjusting the opening degree of the servo valve core, the pressure surge can be caused by the redundant flow discharged by the constant delivery pump, the opening pressure of a safety valve of the system is reached, and the oil returns to the oil tank through overflow, so that the system generates heat.
Disclosure of Invention
In order to solve the problems of a hydraulic pump station of a jack in the prior art, the invention provides the hydraulic pump station of the hydraulic jack driving a mechanical self-locking protection device, which is matched with the hydraulic jack with the mechanical self-locking protection device and an electromagnetic stop valve, realizes the long-time loading support of the jack at any position, is provided with a pressure compensation valve, greatly reduces the pressure loss and greatly reduces the heat productivity of a system.
In order to solve the technical problems, the invention provides the following technical scheme: a hydraulic pump station of a hydraulic jack driving a mechanical self-locking protection device comprises an oil tank, wherein a servo motor pump set, a proportional valve set and an electric cabinet are arranged at the top of the oil tank; the servo motor pump set comprises a servo motor, a high-pressure plunger pump and a damping ring; the hydraulic jack is characterized in that the servo motor is installed at the top of the oil tank, the high-pressure plunger pump is installed inside the oil tank, the servo motor is connected with the high-pressure plunger pump through a flange, a motor shaft is connected with a coupler for the oil pump shaft, a damping ring is additionally arranged between the servo motor and the high-pressure plunger pump, the output end of the high-pressure plunger pump is connected with the proportional valve group through a pipeline, the proportional valve group is connected with an oil cylinder of the hydraulic jack with the mechanical self-locking protection device, and the electric cabinet is located on.
A liquid thermometer, an oil drain ball valve and a heater are further arranged on the side face of the oil tank; the liquid thermometer is connected with the outer wall of the oil tank through a bolt, and the oil drain ball valve is connected with an oil tank interface through a nut; the oil tank top still is equipped with high pressure filter, oil return filter, air cleaner, high pressure filter passes through the fixed bolster and installs in oil tank top both sides, and the oil return filter passes through the bolt and installs at oil tank top central authorities, and high pressure filter, oil return filter pass through hydraulic line with proportional valve group and are connected.
The proportional valve group comprises a proportional servo valve, a pressure compensation valve, a safety overflow valve and a one-way valve, the safety overflow valve is installed at the top of the oil tank, the pressure compensation valve is arranged in front of the proportional servo valve and installed on the safety overflow valve, and the one-way valve is installed on a hydraulic pipeline.
And a pressure measuring joint is arranged on the safety overflow valve and is connected with a pressure gauge through a cable.
The invention has the following beneficial effects:
1) the hydraulic pump station is matched with a hydraulic jack with a mechanical self-locking protection device and an electromagnetic stop valve, so that the jack can be supported at any position with load for a long time.
2) A pressure compensation valve is arranged in front of the proportional servo valve, and on the basis of guaranteeing the oil supply pressure flow of the servo valve, the redundant flow discharged by the pump overflows to an oil return tank through the valve, so that the pressure loss is greatly reduced, and the heat productivity of the system is greatly reduced.
Drawings
The invention is further illustrated by the following figures and examples.
Fig. 1 is a schematic perspective view of the present invention.
Fig. 2 is a schematic top view of the present invention.
Fig. 3 is a hydraulic control schematic of the present invention.
In the figure: the device comprises an oil tank 1, a servo motor pump group 2, a proportional valve group 3, an electric cabinet 4, a servo motor 5, a high-pressure plunger pump 6, a damping ring 7, a liquid thermometer 8, an oil drain ball valve 9, a heater 10, a high-pressure filter 11, an oil return filter 12, an air filter 13, a proportional servo valve 14, a pressure compensation valve 15, a safety overflow valve 16, a one-way valve 17, a pressure measuring joint 18 and a pressure gauge 19.
Detailed Description
Embodiments of the present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1-3, a hydraulic pump station of a hydraulic jack driving a mechanical self-locking protection device comprises an oil tank 1, wherein a servo motor pump set 2, a proportional valve set 3 and an electric cabinet 4 are arranged at the top of the oil tank 1; the servo motor pump group 2 comprises a servo motor 5, a high-pressure plunger pump 6 and a damping ring 7; the hydraulic oil tank is characterized in that the servo motor 5 is installed at the top of the oil tank 1, the high-pressure plunger pump 6 is installed inside the oil tank 1, the servo motor 5 is connected with the high-pressure plunger pump 6 through a flange, a motor shaft is connected with a shaft coupling for an oil pump shaft, a damping ring 7 is additionally arranged between the servo motor 5 and the high-pressure plunger pump 6, the output end of the high-pressure plunger pump 6 is connected with the proportional valve group 3 through a pipeline, the proportional valve group 3 is connected with an oil cylinder of a hydraulic jack with a mechanical self-locking protection device, and the electric cabinet 4 is located on the side.
Further, a liquid thermometer 8, an oil drain ball valve 9 and a heater 10 are further arranged on the side surface of the oil tank 1; the liquid thermometer 8 is connected with the outer wall of the oil tank 1 through a bolt, and the oil drain ball valve 9 is connected with a connector of the oil tank 1 through a nut; 1 top of oil tank still is equipped with high pressure filter 11, return oil filter 12, air cleaner 13, high pressure filter 11 passes through the fixed bolster to be installed in 1 top both sides of oil tank, and return oil filter 12 passes through the bolt and installs at 1 top central authorities of oil tank, and high pressure filter 11, return oil filter 12 pass through hydraulic line with proportional valve group 3 and are connected. In the working process, the safety of the hydraulic station can be ensured by adopting the structure.
Further, the proportional valve group 3 comprises a proportional servo valve 14, a pressure compensation valve 15, a safety overflow valve 16 and a check valve 17, the safety overflow valve 16 is installed at the top of the oil tank, the pressure compensation valve 15 is arranged in front of the proportional servo valve 14 and installed on the safety overflow valve 16, and the check valve 17 is installed on a hydraulic pipeline. On the basis of ensuring the oil supply pressure flow of the servo valve by arranging the pressure compensation valve in front of the proportional servo valve, the redundant flow discharged by the pump overflows to the oil return tank through the valve, so that the pressure loss is greatly reduced, and the heat productivity of the system is greatly reduced.
Further, a pressure measuring joint 18 is arranged on the safety overflow valve 16, and the pressure measuring joint 18 is connected with a pressure gauge 19 through a cable. The system oil pressure can be known in time through the pressure gauge 18. Thereby playing the role of safety protection.
The working principle of the invention is as follows:
and (3) jacking the jack, starting the servo motor 5 to drive the high-pressure plunger pump 6 to supply oil to the system, starting the electromagnetic stop valve, enabling the hydraulic oil to pass through the high-pressure filter 11, the pressure compensation valve 15, the proportional servo valve 14 and the electromagnetic stop valve through the high-pressure plunger pump 6 to reach the jack, and pushing the jack to ascend. After the jack is lifted in place, the system closes the electromagnetic stop valve, cuts off the oil supply circuit of the jack and locks, and the jack is in a closed pressure maintaining state. The mechanical safety rotating nut moves synchronously along with the hydraulic jack in the whole jacking process, so that the construction safety is protected.
Before the jack falls, the mechanical locking device of the jack is loosened, the electromagnetic stop valve is opened, the hydraulic oil returns to the oil tank 1 through the electromagnetic stop valve and the proportional servo valve 14, and the jack is released to fall under load. During the falling process, the opening of the valve core of the proportional servo valve 14 is automatically adjusted to control the flow, after the valve core falls in place, the electromagnetic stop valve is closed by the system, the oil supply circuit of the jack is cut off, and the jack is locked and is in a closed pressure maintaining state. The mechanical safety rotating nut moves synchronously along with the hydraulic jack in the whole falling process, so that the construction safety is protected.
From the above description, those skilled in the art can make various changes and modifications within the scope of the technical idea of the present invention without departing from the scope of the invention. The present invention is not limited to the details given herein, but is within the ordinary knowledge of those skilled in the art.

Claims (1)

1. The utility model provides a hydraulic power unit of hydraulic jack of driving band machinery auto-lock protection device which characterized in that: the oil tank comprises an oil tank (1), wherein a servo motor pump set (2), a proportional valve set (3) and an electric cabinet (4) are arranged at the top of the oil tank (1); the servo motor pump set (2) comprises a servo motor (5), a high-pressure plunger pump (6) and a damping ring (7); the hydraulic oil tank is characterized in that the servo motor (5) is installed at the top of the oil tank (1), the high-pressure plunger pump (6) is installed inside the oil tank (1), the servo motor (5) is connected with the high-pressure plunger pump (6) through a flange, a motor shaft is connected with an oil pump shaft through a coupler, a damping ring (7) is additionally arranged between the servo motor (5) and the high-pressure plunger pump (6), the output end of the high-pressure plunger pump (6) is connected with the proportional valve group (3) through a pipeline, the proportional valve group (3) is connected with an oil cylinder of a hydraulic jack with a mechanical self-locking protection device, and the electric cabinet (4) is located on the side of the oil tank;
the side surface of the oil tank (1) is also provided with a liquid thermometer (8), an oil drain ball valve (9) and a heater (10); the liquid thermometer (8) is connected with the outer wall of the oil tank (1) through a bolt, and the oil drain ball valve (9) is connected with a connector of the oil tank (1) through a nut; the top of the oil tank (1) is also provided with a high-pressure filter (11), an oil return filter (12) and an air filter (13), the high-pressure filter (11) is installed on two sides of the top of the oil tank (1) through a fixing support, the oil return filter (12) is installed in the center of the top of the oil tank (1) through bolts, and the high-pressure filter (11) and the oil return filter (12) are connected with the proportional valve group (3) through hydraulic pipelines;
the proportional valve group (3) comprises a proportional servo valve (14), a pressure compensation valve (15), a safety overflow valve (16) and a check valve (17), the safety overflow valve (16) is installed at the top of the oil tank, the pressure compensation valve (15) is arranged in front of the proportional servo valve (14) and installed on the safety overflow valve (16), and the check valve (17) is installed on a hydraulic pipeline;
a pressure measuring joint (18) is arranged on the safety overflow valve (16), and the pressure measuring joint (18) is connected with a pressure gauge (19) through a cable;
a pressure compensation valve is arranged in front of the proportional servo valve, and on the basis of ensuring the oil supply pressure flow of the servo valve, the redundant flow discharged by the pump overflows to an oil return tank through the pressure compensation valve, so that the pressure loss is greatly reduced, and the heat productivity of the system is greatly reduced;
jacking the jack, starting a servo motor (5) to drive a high-pressure plunger pump (6) to supply oil to the system, starting an electromagnetic stop valve, enabling hydraulic oil to pass through a high-pressure filter (11), a pressure compensation valve (15), a proportional servo valve (14) and the electromagnetic stop valve through the high-pressure plunger pump (6) and reach the jack, and pushing the jack to ascend; after the jack is lifted in place, the system closes the electromagnetic stop valve, cuts off the oil supply circuit of the jack and locks, and the jack is in a closed pressure maintaining state; the mechanical safety rotating nut synchronously acts along with the hydraulic jack in the whole jacking process, so that the construction safety is protected;
before the jack falls, the mechanical locking device of the jack is loosened, the electromagnetic stop valve is opened, the hydraulic oil returns to the oil tank (1) through the electromagnetic stop valve and the proportional servo valve (14), and the jack is released to fall under the load; in the falling process, the opening degree of a valve core of the proportional servo valve (14) is automatically adjusted to control the flow, after the proportional servo valve falls in place, the electromagnetic stop valve is closed by the system, the oil supply circuit of the jack is cut off, and the jack is locked and is in a closed pressure maintaining state; the mechanical safety rotating nut moves synchronously along with the hydraulic jack in the whole falling process, so that the construction safety is protected.
CN201810456636.5A 2018-05-14 2018-05-14 Hydraulic pump station of hydraulic jack driving mechanical self-locking protection device Active CN108675197B (en)

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Application Number Priority Date Filing Date Title
CN201810456636.5A CN108675197B (en) 2018-05-14 2018-05-14 Hydraulic pump station of hydraulic jack driving mechanical self-locking protection device

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CN108675197B true CN108675197B (en) 2020-07-28

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CN113318807A (en) * 2021-06-07 2021-08-31 山东元征行机械设备有限公司 Semi-fixed hydraulic crusher

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CN101982655B (en) * 2010-11-03 2011-12-14 天津市欧曼液压装备系统工程有限公司 Proportional and hydraulic tracking system for trough solar thermal power generating condenser
CN103086301A (en) * 2011-10-27 2013-05-08 中国化工橡胶桂林有限公司 Hydraulic anti-descending system for tire carriers
CN203021247U (en) * 2012-12-24 2013-06-26 中国人民解放军63908部队 Small combination single-stage large-stroke hydraulic jacking device
CN103424326B (en) * 2013-08-07 2015-05-06 中国矿业大学 Coal rock cutting test device and cutting tool test method
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