CN112283188A - Servo hydraulic system of axial force - Google Patents
Servo hydraulic system of axial force Download PDFInfo
- Publication number
- CN112283188A CN112283188A CN202010949886.XA CN202010949886A CN112283188A CN 112283188 A CN112283188 A CN 112283188A CN 202010949886 A CN202010949886 A CN 202010949886A CN 112283188 A CN112283188 A CN 112283188A
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- China
- Prior art keywords
- oil
- axial force
- valve
- way
- force servo
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- 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.)
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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
- 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
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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
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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
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/26—Locking mechanisms
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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
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/26—Locking mechanisms
- F15B2015/268—Fluid supply for locking or release independent of actuator pressurisation
-
- 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
- F15B2211/20507—Type of prime mover
- F15B2211/20515—Electric motor
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- 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 relates to an axial force servo hydraulic system. The axial force servo hydraulic system comprises an oil tank, a motor, an oil pump, a two-position four-way electromagnetic valve and at least one axial force servo unit, wherein the motor is connected with the oil pump, an oil suction port of the oil pump is connected with the oil tank, an oil outlet of the oil pump is connected with a pressure oil port of the two-position four-way electromagnetic valve, a working oil port of the two-position four-way electromagnetic valve is respectively connected with the axial force servo unit, and an oil return port of the two-position four-way electromagnetic valve is connected with the oil tank. The axial force servo hydraulic system provided by the invention reduces the investment of a hydraulic oil pipe, simplifies the system structure, simplifies the installation and disassembly of the system, improves the installation working efficiency and achieves the effects of time saving and labor saving.
Description
Technical Field
The invention relates to the technical field of hydraulic power equipment, in particular to a shaft force servo hydraulic system.
Background
When the subway foundation pit is excavated, the steel support is needed to be adopted to reinforce the foundation pit, and earth excavation can be carried out after the steel support is erected and the axial force is pre-applied. The traditional axial force application is that a manual jack applies axial force, a steel wedge is used for tightening, and then the jack is dismantled to complete the axial force pre-application; because steel shotcrete axle power can arouse the axle power because temperature or other reasons change, traditional steel shotcrete axle power can not master the power value situation of change in time, so appeared the axle power servo in the market in recent years, carried out automatic servo monitoring to foundation ditch axle power, solved the drawback of traditional steel shotcrete axle power. But there are some deficiencies in existing axial force servo system, for example, some axial force servo systems introduce the hydraulic lock for the retraction of control jack piston, but after the hydraulic lock is held tightly, must set up one way oil circuit alone and lock the oil for hydraulic pressure and just can open the hydraulic lock, have brought unnecessary work load for the construction, occupy an oil circuit of pump station moreover, increase hydraulic pump station's burden.
Disclosure of Invention
In order to solve the technical problems that an oil way needs to be independently arranged and the burden of a hydraulic pump station needs to be increased in the axial force servo hydraulic system with the hydraulic lock, the invention provides the axial force servo hydraulic system, the investment of a hydraulic oil pipe is reduced, the structure of the system is simplified, the installation and the disassembly of the system are simple, the installation working efficiency is improved, and the time-saving and labor-saving effects are achieved.
The invention provides an axial force servo hydraulic system which comprises an oil tank, a motor, an oil pump, a two-position four-way electromagnetic valve and at least one axial force servo unit, wherein the motor is connected with the oil pump;
the axial force servo unit comprises a three-position four-way electromagnetic valve, a hydraulic control one-way valve, a jack, a one-way sequence valve and a mechanical lock, wherein a pressure oil port and an oil return port of the three-position four-way electromagnetic valve are respectively connected with two working oil ports of the two-position four-way electromagnetic valve, a first working oil port of the three-position four-way electromagnetic valve is connected with an oil inlet of the hydraulic control one-way valve, and a second working oil port of the three-position four-way electromagnetic valve is connected with an oil inlet of the one-way; the oil outlet of the hydraulic control one-way valve is connected with the rodless cavity of the jack; the oil outlet of the one-way sequence valve is connected with the rod cavity of the jack; the mechanical lock is connected with a second working oil port of the three-position four-way electromagnetic valve; and a control oil path of the hydraulic control one-way valve is connected with a second working oil port of the three-position four-way electromagnetic valve.
In a preferred embodiment of the axial force servo hydraulic system provided by the present invention, the hydraulic system further includes a first pressure sensor, and the first pressure sensor is connected to an oil outlet of the oil pump.
In a preferred embodiment of the axial force servo hydraulic system provided by the invention, the system further comprises an overflow valve, an oil inlet of the overflow valve is connected with an oil outlet of the oil pump, and an oil outlet of the overflow valve is connected with the oil tank.
In a preferred embodiment of the axial force servo hydraulic system provided by the present invention, the axial force servo unit further includes a second pressure sensor and a pressure gauge, the second pressure sensor is connected to the oil inlet of the jack, and the pressure gauge is connected to the second pressure sensor.
In a preferred embodiment of the axial force servo hydraulic system provided by the invention, the pilot operated check valve reverse opening pilot pressure is smaller than the opening pressure of the check sequence valve.
Compared with the prior art, the axial force servo hydraulic system provided by the invention has the following beneficial effects: the mechanical lock in each axial force servo unit and the rod cavity of the jack share one oil way, so that the investment of a hydraulic oil pipe is reduced, the structure of the axial force servo hydraulic system is simplified, the installation and the disassembly of the axial force servo hydraulic system are simple, the installation work efficiency is improved, and the time-saving and labor-saving effects are achieved; and a one-way sequence valve is arranged between the mechanical lock and the jack, and the mechanical lock is opened before the jack returns oil, so that the oil return operation of the jack is simplified, and the operation is more rapid and convenient.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:
fig. 1 is a schematic structural diagram of an axial force servo hydraulic system provided by the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an axial force servo hydraulic system provided by the present invention. The axial force servo hydraulic system 1 comprises an oil tank 11, a motor 12, an oil pump 13, a two-position four-way electromagnetic valve 14 and at least one axial force servo unit 15, wherein the oil tank 11 provides hydraulic oil for the axial force servo hydraulic system 1; the motor 12 is connected with the oil pump 13 and used for providing power for the oil pump 13; the oil pump 13 is a high-pressure oil pump, an oil suction port of the oil pump 13 is connected with the oil tank 11, an oil outlet of the oil pump 13 is connected with a pressure oil port P of the two-position four-way electromagnetic valve 14, a working oil port A, B of the two-position four-way electromagnetic valve 14 is respectively connected with the axial force servo unit 15, and an oil return port T of the two-position four-way electromagnetic valve 14 is connected with the oil tank 11;
the axial force servo unit 15 comprises a three-position four-way electromagnetic valve 151, a hydraulic control one-way valve 152, a jack 153, a one-way sequence valve 154 and a mechanical lock 155, wherein a pressure oil port P of the three-position four-way electromagnetic valve 151 is connected with a working oil port A of the two-position four-way electromagnetic valve 14, an oil return port T of the three-position four-way electromagnetic valve 151 is connected with a working oil port B of the two-position four-way electromagnetic valve 14, a first working oil port A of the three-position four-way electromagnetic valve 151 is connected with an oil inlet of the hydraulic control one-way valve 152, and a second working oil port B of the three-position four-way electromagnetic; the oil outlet of the hydraulic control one-way valve 152 is connected with the rodless cavity of the jack 153; the oil outlet of the one-way sequence valve 154 is connected with the rod cavity of the jack 153; the mechanical lock 155 is connected to the second working oil port B of the three-position four-way solenoid valve 151, and the mechanical lock 155 is configured to lock the piston of the jack 153 and prevent the piston of the jack 153 from retracting; the control oil path of the hydraulic control check valve 152 is connected to the second working oil port B of the three-position four-way solenoid valve 151.
Further, the shaft force servo hydraulic system 1 further comprises a first pressure sensor 16, wherein the first pressure sensor 16 is connected with an oil outlet of the oil pump 13 and is used for acquiring a hydraulic oil pressure value at the oil outlet of the oil pump 13.
Further, the axial force servo hydraulic system 1 further comprises an overflow valve 17, an oil inlet of the overflow valve 17 is connected with an oil outlet of the oil pump 13, and an oil outlet of the overflow valve 17 is connected with the oil tank 11; through setting up overflow valve 17, can effectively guarantee the oil-out pressure of oil pump 13 is invariable.
Further, the axial force servo unit 15 further includes a second pressure sensor 156 and a pressure gauge 157, the second pressure sensor 156 is connected to the oil inlet of the jack 153, the pressure gauge 157 is connected to the second pressure sensor 156, and the second pressure sensor 156 is used for acquiring a hydraulic oil pressure value at the oil inlet of the jack 153, and displaying the hydraulic oil pressure value through the pressure gauge 157, so that a worker can observe the hydraulic oil pressure value conveniently.
The reverse cracking control pressure of the pilot operated check valve 152 is smaller than the cracking pressure of the one-way sequence valve 154, so as to ensure that the pilot operated check valve 152 can be opened smoothly when the jack 153 returns oil.
When the pressure relief valve is used specifically, the opening pressures of the overflow valve 17 and the one-way sequence valve 154 are set according to actual needs; outputting the hydraulic oil in the oil tank 11 to the axial force servo unit 15 through the oil pump 13, and acquiring a hydraulic oil pressure value at an oil outlet of the oil pump 13 in real time through the first pressure sensor 16; when the jack 153 needs to be extended, the electromagnet 2YA of the three-position four-way solenoid valve 151 is powered on to enable the three-position four-way solenoid valve 151 to be located at the left position, at this time, the pressure oil port P of the three-position four-way solenoid valve 151 is communicated with the first working oil port a, the oil return port T is communicated with the second working oil port B, hydraulic oil flows to the first working oil port a from the pressure oil port P of the three-position four-way solenoid valve 151, and then reaches the rodless cavity of the jack 153 through the hydraulic control one-way valve 152, so that the piston of the jack 153 is pushed to move towards the rod cavity of the jack 153, and the piston of the jack 153 is extended; when the preset extension length is reached, the piston of the jack 153 is locked by the mechanical lock 155, and the piston is prevented from retracting; when the piston of the jack 153 extends, the hydraulic oil in the rod cavity of the jack 153 sequentially passes through the one-way sequence valve 154, the three-position four-way solenoid valve 151 and the two-position four-way solenoid valve 14 to reach the oil tank 11;
when the jack 153 needs to retract, the electromagnet 1YA of the three-position four-way solenoid valve 151 is powered on to enable the three-position four-way solenoid valve 151 to be located at the right position, at this time, a pressure oil port P of the three-position four-way solenoid valve 151 is communicated with a second working oil port B, an oil return port T is communicated with a first working oil port a, and hydraulic oil flows to the second working oil port B from the pressure oil port P of the three-position four-way solenoid valve 151; when the hydraulic oil pressure at the second working oil port B is lower than the opening pressure of the one-way sequence valve 154, the hydraulic oil flows to the mechanical lock 155, and the mechanical lock 155 is opened, so that the piston of the jack 153 can retract; when the hydraulic oil pressure of the second working oil port B reaches the reverse opening control pressure of the hydraulic control check valve 152, the hydraulic oil opens the hydraulic control check valve 152 through the control oil path of the hydraulic control check valve 152, so that the hydraulic oil in the rod-free cavity of the jack 153 can be discharged; when the hydraulic oil pressure of the second working oil port B reaches the opening pressure of the one-way sequence valve 154, the hydraulic oil flows to the rod cavity of the jack 153 through the one-way sequence valve 154, and pushes the piston of the jack 153 to move towards the rodless cavity of the jack 153, so that the piston of the jack 153 retracts; meanwhile, the hydraulic oil in the rodless cavity of the jack 153 sequentially passes through the hydraulic control check valve 152, the three-position four-way solenoid valve 151 and the two-position four-way solenoid valve 14 to reach the oil tank 11.
The axial force servo hydraulic system 1 provided by the invention has the following beneficial effects: the mechanical lock 155 in each axial force servo unit 15 and the rod cavity of the jack 153 share one oil path, so that the investment of a hydraulic oil pipe is reduced, the structure of the axial force servo hydraulic system 1 is simplified, the installation and the disassembly of the axial force servo hydraulic system 1 are simple, the installation work efficiency is improved, and the time and labor saving effects are achieved; the one-way sequence valve 154 is arranged between the mechanical lock 155 and the jack 153, and the mechanical lock 155 is opened before the oil returns from the jack 153, so that the oil return operation of the jack 153 is simplified, and the operation is quicker and more convenient.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (5)
1. An axial force servo hydraulic system is characterized by comprising an oil tank, a motor, an oil pump, a two-position four-way electromagnetic valve and at least one axial force servo unit, wherein the motor is connected with the oil pump;
the axial force servo unit comprises a three-position four-way electromagnetic valve, a hydraulic control one-way valve, a jack, a one-way sequence valve and a mechanical lock, wherein a pressure oil port and an oil return port of the three-position four-way electromagnetic valve are respectively connected with two working oil ports of the two-position four-way electromagnetic valve, a first working oil port of the three-position four-way electromagnetic valve is connected with an oil inlet of the hydraulic control one-way valve, and a second working oil port of the three-position four-way electromagnetic valve is connected with an oil inlet of the one-way; the oil outlet of the hydraulic control one-way valve is connected with the rodless cavity of the jack; the oil outlet of the one-way sequence valve is connected with the rod cavity of the jack; the mechanical lock is connected with a second working oil port of the three-position four-way electromagnetic valve; and a control oil path of the hydraulic control one-way valve is connected with a second working oil port of the three-position four-way electromagnetic valve.
2. The axial force servo hydraulic system of claim 1, further comprising a first pressure sensor connected to an oil outlet of the oil pump.
3. The axial force servo hydraulic system according to claim 1, further comprising an overflow valve, wherein an oil inlet of the overflow valve is connected to an oil outlet of the oil pump, and an oil outlet of the overflow valve is connected to the oil tank.
4. The axial force servo hydraulic system according to claim 1, wherein the axial force servo unit further comprises a second pressure sensor and a pressure gauge, the second pressure sensor is connected with the oil inlet of the jack, and the pressure gauge is connected with the second pressure sensor.
5. An axial force servo hydraulic system as set forth in claim 1 wherein said pilot operated check valve reverse cracking pilot pressure is less than said cracking pressure of said one way priority valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010949886.XA CN112283188A (en) | 2020-09-10 | 2020-09-10 | Servo hydraulic system of axial force |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010949886.XA CN112283188A (en) | 2020-09-10 | 2020-09-10 | Servo hydraulic system of axial force |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112283188A true CN112283188A (en) | 2021-01-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010949886.XA Pending CN112283188A (en) | 2020-09-10 | 2020-09-10 | Servo hydraulic system of axial force |
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| CN (1) | CN112283188A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115013369A (en) * | 2022-07-12 | 2022-09-06 | 中国铁路设计集团有限公司 | Synchronous hydraulic system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10154465A1 (en) * | 2001-11-08 | 2003-05-22 | Bosch Rexroth Ag | Closing unit for a plastic processing machine |
| CN202415033U (en) * | 2011-12-05 | 2012-09-05 | 三一重工股份有限公司 | Locking system for landing leg of engineering machine and engineering machine |
| CN204434182U (en) * | 2014-12-26 | 2015-07-01 | 柳州欧维姆机械股份有限公司 | Intelligence division control type hydraulic synchronous jacking system |
| CN104762977A (en) * | 2015-03-18 | 2015-07-08 | 上海建工集团股份有限公司 | Foundation pit support force real-time control system and method |
| CN106640825A (en) * | 2017-03-17 | 2017-05-10 | 上海同禾土木工程科技有限公司 | Supporting axial force computer numerical control hydraulic device and frequency conversion control method thereof |
-
2020
- 2020-09-10 CN CN202010949886.XA patent/CN112283188A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10154465A1 (en) * | 2001-11-08 | 2003-05-22 | Bosch Rexroth Ag | Closing unit for a plastic processing machine |
| CN202415033U (en) * | 2011-12-05 | 2012-09-05 | 三一重工股份有限公司 | Locking system for landing leg of engineering machine and engineering machine |
| CN204434182U (en) * | 2014-12-26 | 2015-07-01 | 柳州欧维姆机械股份有限公司 | Intelligence division control type hydraulic synchronous jacking system |
| CN104762977A (en) * | 2015-03-18 | 2015-07-08 | 上海建工集团股份有限公司 | Foundation pit support force real-time control system and method |
| CN106640825A (en) * | 2017-03-17 | 2017-05-10 | 上海同禾土木工程科技有限公司 | Supporting axial force computer numerical control hydraulic device and frequency conversion control method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115013369A (en) * | 2022-07-12 | 2022-09-06 | 中国铁路设计集团有限公司 | Synchronous hydraulic system |
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Application publication date: 20210129 |
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