CN102320510A - Hydraulic elevator - Google Patents
Hydraulic elevator Download PDFInfo
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- CN102320510A CN102320510A CN201110266576A CN201110266576A CN102320510A CN 102320510 A CN102320510 A CN 102320510A CN 201110266576 A CN201110266576 A CN 201110266576A CN 201110266576 A CN201110266576 A CN 201110266576A CN 102320510 A CN102320510 A CN 102320510A
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- 239000003921 oil Substances 0.000 claims abstract description 109
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 4
- 239000010959 steel Substances 0.000 claims abstract description 4
- 230000001502 supplementing effect Effects 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims 1
- 230000009471 action Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B50/00—Energy efficient technologies in elevators, escalators and moving walkways, e.g. energy saving or recuperation technologies
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Abstract
The invention discloses a hydraulic elevator, comprising a cage, an oil cylinder for supporting the cage to move, a hydraulic oil path for driving the oil cylinder and a control system, wherein the oil cylinder for supporting the cage to move is a piston cylinder; the top end of a piston rod of the piston cylinder is provided with a movable pulley; the top end of an elevator hoistway is provided with a fixed pulley; a steel wire rope is connected with the cage by the movable pulley and the fixed pulley; and the hydraulic oil path and the control system comprise a frequency converter, a hydraulic pump, a first main control valve, a second main control valve, a first pressure transmitter, a second pressure transmitter, a microcomputer controller, an energy accumulator, an overflowing valve and an oil supplying device. The hydraulic elevator disclosed by the invention is energy-saving and environmentally-friendly by a reasonable structure.
Description
Technical Field
The invention relates to a hydraulic elevator.
Background
The hydraulic elevator quickly occupies a part of domestic market with the advantages of flexible room arrangement, safety, reliability and convenient maintenance. Chinese patent 200910027155.3, publication number CN101638202A, publication number 2/3/2010, discloses a hydraulic elevator system, the structure of which is: the rectification inversion module is sequentially connected with the control system, the motor, the hydraulic pump and the hydraulic elevator system in series, the output end of the control system is sequentially connected with the driving module, the hydraulic elevator system, the oil unloading valve, the oil tank and the hydraulic sensor in series and then returns to the control system, the output end of the overflow valve is respectively connected with the hydraulic pump and the oil tank, the output end of the oil tank is connected with the hydraulic pump, and the output end of the oil unloading valve is sequentially connected with the pressure transmitter, the electromagnetic valve and. At present, in published documents, hydraulic elevators use a large amount of hydraulic oil and consume a large amount of energy, and along with the enhancement of environmental awareness of people, the problems of environmental pollution and energy conservation and emission reduction of the hydraulic elevators are increasingly prominent.
Disclosure of Invention
The invention aims to provide a hydraulic elevator, which reduces the use amount of hydraulic oil of the hydraulic elevator and energy consumption through reasonable design of a hydraulic oil circuit and a control system.
The technical scheme of the invention is as follows: a hydraulic elevator comprises a car, an oil cylinder supporting the car to move, a hydraulic oil circuit driving the oil cylinder and a control system;
the oil cylinder supporting the movement of the lift car is a piston cylinder, the top end of a piston rod of the oil cylinder is provided with a movable pulley, the top end of an elevator shaft is provided with a fixed pulley, and a steel wire rope is connected with the lift car through the movable pulley and the fixed pulley; the piston rod of the piston cylinder can bear pressure, and the stability problem of the piston rod is avoided, so that the working pressure grade of the oil cylinder can be improved, and the efficiency of the system is improved.
The hydraulic oil circuit and the control system comprise a frequency converter, a hydraulic pump, a first main control valve, a second main control valve, a first pressure transmitter, a second pressure transmitter, a microcomputer controller, an energy accumulator, an overflow valve and an oil supplementing device.
The two ends of the hydraulic pump are respectively connected with a first main control valve A oil port and a second main control valve A oil port, a first main control valve B oil port is connected with an energy accumulator, a second main control valve B oil port is connected with a piston cylinder, a first pressure transmitter is arranged on an oil path between the first main control valve B oil port and the energy accumulator in parallel, a second pressure transmitter is arranged on an oil path between the second main control valve B oil port and the piston cylinder, and an overflow valve and an oil supplementing device are connected with the energy accumulator in parallel; the accumulator stores the hydraulic oil of certain capacity, and the pump station can directly regard as the oil source with the accumulator without the oil tank, and the accumulator is laid the position nimble, and the balanced weight of its hydraulic pressure counter weight can exceed no-load car weight, can set up the hydraulic pressure counter weight with the counter weight thought of drawing the elevator for reference, makes hydraulic elevator's installed power reduce to the installed power level of drawing the elevator.
The microcomputer controller receives the operation instruction and the signals of the first pressure transmitter and the second pressure transmitter to control the on-off state of the first main control valve and the second main control valve and transmit the instruction to the frequency converter, and the frequency converter is used for controlling the steering and the rotating speed of the hydraulic pump motor.
Furthermore, a manual pump and a manual descending valve are arranged on an oil path between an oil port B of the second main control valve and the piston cylinder; in the event of a failure of the elevator control system, the manual pump and manual descent valve can raise or lower the car.
And furthermore, the hydraulic pump and the oil port A of the first main control valve and the hydraulic pump and the oil port A of the second main control valve are connected in parallel on a pipeline to form an air suction prevention safety device.
Further, the air-suction-preventing safety device comprises an air-suction-preventing one-way valve and a safety valve which are connected in parallel, and an oil tank is arranged at the outlets of the air-suction-preventing one-way valve and the safety valve; when the pressure of an oil inlet and an oil outlet of the hydraulic pump rises sharply due to faults, high-pressure oil can be unloaded to the oil tank through the safety valve, and when a certain main control valve fails to be opened normally, the hydraulic pump can suck hydraulic oil from the suction-preventing one-way valve on one side of the main control valve, so that the hydraulic pump is protected from being damaged due to suction.
The main control valve comprises a hydraulic control one-way valve, a two-position three-way electromagnetic valve and an oil tank, the two-position three-way electromagnetic valve comprises a first oil path and a second oil path, a control oil port X is arranged on the one-way valve, and according to the state of the two-position three-way electromagnetic valve, the control oil port X of the one-way valve is communicated with the first oil path of the two-position three-way electromagnetic valve through the control oil path and is connected with the oil port B of the main control valve in parallel or is communicated with. The valve core of the hydraulic control one-way valve is of a cone valve type structure, a two-position three-way electromagnetic valve of a control oil way of the hydraulic control one-way valve is of a ball valve structure, so that the sealing performance of a valve group is good, internal leakage cannot be generated, when hydraulic oil flows forwards, the valve core of the hydraulic control one-way valve can be opened or closed naturally under the action of pressure difference at two ends of the valve core, the two-position three-way electromagnetic valve does not need to act, when the hydraulic control one-way valve needs to flow backwards, an electromagnet of the two-position three-way electromagnetic valve is electrified, a control oil port of the hydraulic control one-way valve is communicated with high-pressure oil, the high-pressure oil enables a control piston in the hydraulic control one-way valve to push the valve core to be opened, the electromagnetism of the two-position three-way electromagnetic valve is powered off, the.
The piston rod of the piston cylinder can bear tension without the problem of the stability of the pressure rod, so that the working pressure of the oil cylinder can be improved, the system efficiency is improved, and under the condition of unchanged load, the improvement of the pressure grade means that the effective working area of the oil cylinder is reduced, and the use of the oil quantity is reduced; the pressure of the energy accumulator balances the weight of part of the load, and the installed power of the hydraulic power system can be reduced; part of potential energy generated when the elevator descends can be stored in the energy accumulator in the form of pressure energy; the frequency converter is used for driving the hydraulic pump, so that the variable-speed volume speed regulation of the hydraulic power system is realized, the input power of the system is completely matched with the power required by the load, and no throttling loss or overflow loss exists.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of the air-suction-preventing safety device of the present invention.
Fig. 3 is a schematic structural diagram of the main control valve of the present invention when the main control valve is powered off.
Fig. 4 is a schematic structural diagram of the main control valve of the present invention when it is energized.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
As shown in fig. 1, a hydraulic elevator includes a car, an oil cylinder for supporting the car to move, a hydraulic oil circuit for driving the oil cylinder, and a control system. The oil cylinder supporting the movement of the lift car is a piston cylinder 8, the top end of a piston rod of the oil cylinder is provided with a movable pulley, the top end of an elevator shaft is provided with a fixed pulley, and a steel wire rope is connected with the lift car through the movable pulley and the fixed pulley. Hydraulic pressure oil circuit and control system include converter, hydraulic pump 13, first main control valve 5, second main control valve 6, first pressure transmitter 4, second pressure transmitter 7, microcomputer controller, accumulator 1, wherein: the two ends of the hydraulic pump 13 are respectively connected with the oil port A of the first main control valve 5 and the oil port A of the second main control valve 6, the oil port B of the first main control valve 5 is connected with the energy accumulator, the oil port B of the second main control valve 6 is connected with the piston cylinder 8, the first pressure transmitter 4 is arranged on an oil path between the oil port B of the first main control valve 5 and the energy accumulator 1, the second pressure transmitter 7 is arranged on an oil path between the oil port B of the second main control valve 6 and the piston cylinder 8, and the overflow valve 2 and the oil supplementing device 3 are connected with the energy accumulator 1 in parallel. The microcomputer controller receives the operation instruction and the signals of the first pressure transmitter 4 and the second pressure transmitter 7 to control the on-off state of the first main control valve 5 and the second main control valve 6 and transmit the instruction to the frequency converter, and the frequency converter controls the rotation direction and the rotation speed of the motor of the hydraulic pump 13. And a manual pump 10 and a manual descending valve 9 are arranged on an oil path between the oil port B of the second main control valve 6 and the piston cylinder 8. And the hydraulic pump 13 and the oil ports A of the first main control valve 5 and the hydraulic pump 13 and the oil ports A of the second main control valve 6 are connected in parallel on pipelines to form an air suction prevention safety device.
As shown in fig. 2, the anti-suck-down safety device comprises an anti-suck-down check valve 12 and a safety valve 11 which are connected in parallel, and an oil tank 24 is arranged at the outlet of the anti-suck-down check valve 12 and the outlet of the safety valve 11.
As shown in fig. 3 and 4, the main control valves 5 and 6 include a pilot-controlled check valve 15, a two-position three-way electromagnetic valve 14 and an oil tank 23, the two-position three-way electromagnetic valve 14 includes a first oil path 22 and a second oil path 21, a control oil port X is arranged on the check valve 15, and according to the state of the two-position three-way electromagnetic valve 14, the control oil port X of the check valve 15 is communicated with the first oil path 22 of the two-position three-way electromagnetic valve 14 through a control oil path 25 and is connected with the oil port B in parallel or is communicated with the second oil path 21 of the two-. When the main control valves 5 and 6 are in the power-off condition, the control oil path 25 is communicated with the second oil path 21 of the two-position three-way electromagnetic valve 14 and is connected into the oil tank 23. When the main control valves 5 and 6 are in the energized state, the control oil path 25 is connected in parallel with the port B of the main control valve through the first oil path 22 of the three-way electromagnetic valve 14.
The elevator runs upwards: after receiving the ascending instruction of the elevator, the microcomputer controller outputs a forward rotation instruction and a zero rotation speed instruction to the frequency converter, and simultaneously sends an electrifying signal to the two-position three-way electromagnetic valve 14 of the first main control valve 5, so that the first main control valve 5 is changed from a cut-off state to a complete conduction state. The pressure of the hydraulic oil in the accumulator 1 acts on the first main control valve 5 side of the hydraulic pump 13, so that a certain driving torque is generated on the hydraulic pump 13, and meanwhile, a part of the hydraulic oil leaks through the hydraulic pump 13, and a certain pressure is rapidly built on the second main control valve 6 side of the hydraulic pump 13, and a certain torque is also generated on the hydraulic pump 13. After receiving the command signal from the microcomputer controller, the frequency converter outputs a certain current torque to the motor of the hydraulic pump 13, so that the torque of the hydraulic pump 13 is balanced, and the car is stationary. Then, the microcomputer controller outputs a speed instruction signal corresponding to the expected speed to the frequency converter according to the detected position information of the car, the hydraulic pump 13 rotates forwards according to the given speed instruction, the flow rate of the hydraulic oil output to the piston cylinder 8 from the energy accumulator 1 corresponds to the speed instruction, a piston rod of the piston cylinder 8 contracts downwards, and the car is driven by the pulley block to complete several operation stages of acceleration, uniform speed, deceleration and leveling at one time according to an ideal speed curve. When the lift car reaches a selected floor, the microcomputer controller receives a stop signal and then gives a power-off signal to the two-position three-way electromagnetic valve 14 of the first main control valve 5, the electromagnet is powered off, the first main control valve 5 is changed from a conducting state to a stopping state, the microcomputer controller stops outputting steering and rotating speed instructions to the frequency converter, the hydraulic pump 13 stops working, and two ends of the hydraulic control one-way valve 15 of the second main control valve 6 are naturally shut off under the action of pressure difference. The lift car stays at the flat bed position, and the ascending process of the elevator is finished.
The elevator runs downwards: after receiving the elevator downlink instruction signal, the microcomputer controller outputs a reverse direction instruction and a zero rotating speed instruction to the frequency converter, and simultaneously sends an electrifying signal to the two-position three-way electromagnetic valve 14 of the first main control valve 5, so that the first main control valve 5 is changed from a cut-off state to a complete conduction state. The hydraulic oil pressure in the energy accumulator 1 acts on the hydraulic pump 13 to generate a certain positive resistance moment, the microcomputer controller provides an energizing signal of the two-position three-way electromagnetic valve 14 of the first main control valve 5 and delays for a certain time, and then provides an energizing signal of the two-position three-way electromagnetic valve 14 of the second main control valve 6, the second main control valve 6 is changed from a cut-off state to a complete conduction state, at the moment, the hydraulic oil pressure of the piston cylinder also acts on the hydraulic pump 13, and therefore a certain reverse driving moment is generated on the hydraulic pump 13. After receiving the instruction of the microcomputer controller, the frequency converter outputs a certain current torque to the motor of the hydraulic pump 13, so that the torque of the hydraulic pump 13 keeps balance, and the elevator is stationary. The microcomputer controller outputs a speed instruction signal corresponding to the expected speed to the frequency converter according to the detected position information of the car, the hydraulic pump 13 reversely rotates according to the given speed instruction, the flow rate of the hydraulic oil output to the energy accumulator 1 by the piston cylinder 8 corresponds to the speed instruction, a piston rod of the piston cylinder 8 extends upwards, and the car completes several operation stages of acceleration, uniform speed, deceleration and leveling according to the ideal speed. When the lift car reaches the selected floor, the microcomputer controller receives the stop signal, the second main control valve 6 is changed from the on state to the off state, the microcomputer controller stops outputting steering and rotating speed instructions to the frequency converter, the hydraulic pump 13 stops rotating, the first main control valve 5 is naturally turned off under the action of the pressure difference between the two ends, the lift car stops at the flat floor position, and the descending process is finished.
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 (5)
1. A hydraulic elevator comprises a car, an oil cylinder supporting the car to move, a hydraulic oil circuit driving the oil cylinder, a control system and the like. It is characterized in that the preparation method is characterized in that,
the oil cylinder supporting the movement of the lift car is a piston cylinder, the top end of a piston rod of the oil cylinder is provided with a movable pulley, the top end of an elevator shaft is provided with a fixed pulley, and a steel wire rope is connected with the lift car through the movable pulley and the fixed pulley;
the hydraulic oil circuit and the control system comprise a frequency converter, a hydraulic pump, a first main control valve, a second main control valve, a first pressure transmitter, a second pressure transmitter, a microcomputer controller, an energy accumulator, an overflow valve and an oil supplementing device. Wherein,
the two ends of the hydraulic pump are respectively connected with an oil port A of the first main control valve and an oil port A of the second main control valve, an oil port B of the first main control valve is connected with the energy accumulator, an oil port B of the second main control valve is connected with the piston cylinder, the first pressure transmitter is arranged on an oil path between the oil port B of the first main control valve and the energy accumulator in parallel, the second pressure transmitter is arranged on an oil path between the oil port B of the second main control valve and the piston cylinder, and the overflow valve and the oil supplementing device are connected with the energy accumulator in parallel.
The microcomputer controller receives the operation instruction and the signals of the first pressure transmitter and the second pressure transmitter to control the on-off state of the first main control valve and the second main control valve and transmit the instruction to the frequency converter, and the frequency converter is used for controlling the steering and the rotating speed of the hydraulic pump motor.
2. The hydraulic elevator according to claim 1, wherein a manual pump and a manual lowering valve are arranged on an oil path between the oil port B of the second main control valve and the piston cylinder.
3. The hydraulic elevator as claimed in claim 1, wherein the hydraulic pump is connected in parallel to the lines of ports a of the first main control valve and ports a of the hydraulic pump and the second main control valve to form an anti-empty safety device.
4. A hydraulic elevator according to claim 3, characterized in that said anti-empty-of-suction safety device comprises an anti-empty-of-suction check valve and a safety valve connected in parallel, the outlet of said anti-empty-of-suction check valve and safety valve being provided with an oil tank.
5. A hydraulic elevator according to any one of claims 1-4, characterized in that the main control valve comprises a pilot operated check valve, a two-position three-way solenoid valve, an oil tank. The two-position three-way electromagnetic valve comprises a first oil way and a second oil way, a control oil port X is arranged on the check valve, and according to the state of the two-position three-way electromagnetic valve, the control oil port X of the check valve is communicated with the first oil way of the two-position three-way electromagnetic valve through the control oil way and is connected with an oil port B of the main control valve in parallel or is communicated with the second oil way of the two-position three-way electromagnetic valve to be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110266576A CN102320510A (en) | 2011-09-08 | 2011-09-08 | Hydraulic elevator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110266576A CN102320510A (en) | 2011-09-08 | 2011-09-08 | Hydraulic elevator |
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| Publication Number | Publication Date |
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| CN102320510A true CN102320510A (en) | 2012-01-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110266576A Pending CN102320510A (en) | 2011-09-08 | 2011-09-08 | Hydraulic elevator |
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| CN (1) | CN102320510A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103979388A (en) * | 2014-05-30 | 2014-08-13 | 马健勇 | Room-free pit-free barrier-free elevator |
| CN104401850A (en) * | 2014-09-18 | 2015-03-11 | 韦伯电梯有限公司 | Hydraulic elevator system with large load and high speed |
| CN105022334A (en) * | 2015-06-24 | 2015-11-04 | 南通理工学院 | Electrical monitoring device for elevator |
| CN105293257A (en) * | 2015-10-13 | 2016-02-03 | 张忠海 | Numerically-control hydraulic muting type household elevator |
| WO2016197834A1 (en) * | 2015-06-08 | 2016-12-15 | 姜永达 | Electrically controlled hydraulic lifting system and electrically controlled hydraulic lifting elevator |
| CN107738970A (en) * | 2016-11-25 | 2018-02-27 | 重庆键英液压机电有限公司 | Lowering or hoisting gear based on multistage hydraulic cylinder |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1220644A (en) * | 1997-02-06 | 1999-06-23 | 贝林格液压设备有限公司 | Method and device for controlling hydraulic lift |
| CN1436712A (en) * | 2002-02-08 | 2003-08-20 | 上海三菱电梯有限公司 | Frequency-varying driving elevator hydraulic control system |
| US20040173412A1 (en) * | 2001-11-16 | 2004-09-09 | Hugo Birbaumer | Hydraulic elevator with a pressure accumulator and method for controlling and adjusting said elevator |
| CN101397112A (en) * | 2007-09-25 | 2009-04-01 | 上海三菱电梯有限公司 | Frequency-changing hydraulic elevator system |
-
2011
- 2011-09-08 CN CN201110266576A patent/CN102320510A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1220644A (en) * | 1997-02-06 | 1999-06-23 | 贝林格液压设备有限公司 | Method and device for controlling hydraulic lift |
| US20040173412A1 (en) * | 2001-11-16 | 2004-09-09 | Hugo Birbaumer | Hydraulic elevator with a pressure accumulator and method for controlling and adjusting said elevator |
| CN1436712A (en) * | 2002-02-08 | 2003-08-20 | 上海三菱电梯有限公司 | Frequency-varying driving elevator hydraulic control system |
| CN101397112A (en) * | 2007-09-25 | 2009-04-01 | 上海三菱电梯有限公司 | Frequency-changing hydraulic elevator system |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103979388A (en) * | 2014-05-30 | 2014-08-13 | 马健勇 | Room-free pit-free barrier-free elevator |
| CN104401850A (en) * | 2014-09-18 | 2015-03-11 | 韦伯电梯有限公司 | Hydraulic elevator system with large load and high speed |
| WO2016197834A1 (en) * | 2015-06-08 | 2016-12-15 | 姜永达 | Electrically controlled hydraulic lifting system and electrically controlled hydraulic lifting elevator |
| CN105022334A (en) * | 2015-06-24 | 2015-11-04 | 南通理工学院 | Electrical monitoring device for elevator |
| CN105293257A (en) * | 2015-10-13 | 2016-02-03 | 张忠海 | Numerically-control hydraulic muting type household elevator |
| CN107738970A (en) * | 2016-11-25 | 2018-02-27 | 重庆键英液压机电有限公司 | Lowering or hoisting gear based on multistage hydraulic cylinder |
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Application publication date: 20120118 |