CN107120325B - Hoistable platform Pure water hydraulic drive system - Google Patents
Hoistable platform Pure water hydraulic drive system Download PDFInfo
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- CN107120325B CN107120325B CN201710288269.8A CN201710288269A CN107120325B CN 107120325 B CN107120325 B CN 107120325B CN 201710288269 A CN201710288269 A CN 201710288269A CN 107120325 B CN107120325 B CN 107120325B
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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
- F15B11/08—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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/022—Installations or systems with accumulators used as an emergency power source, e.g. in case of pump failure
-
- 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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/024—Installations or systems with accumulators used as a supplementary power source, e.g. to store energy in idle periods to balance pump load
-
- 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
-
- 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
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/86—Control during or prevention of abnormal conditions
- F15B2211/863—Control during or prevention of abnormal conditions the abnormal condition being a hydraulic or pneumatic failure
- F15B2211/8633—Pressure source supply failure
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a kind of hoistable platform Pure water hydraulic drive systems, using deionized water as hydraulic transmission medium, including hydraulic piston cylinder, three-position four-way electromagnetic directional valve, proportioning valve, accumulator, check valve, hydraulic control one-way valve, plunger water pump, variable-frequency motor, overflow valve, filter and water tank.The present invention is adjusted hydraulic cylinder motion state using three-position four-way electromagnetic directional valve and proportioning valve in real time, accurately controls the movement velocity of hoistable platform.For hoistable platform heavy duty requirement, accumulator relief circuit as auxiliary power source and is devised using accumulator, the service life of accumulator is improved while the installed power for reducing system.Pure Water Hydraulic Drive Technology is applied in hoistable platform by the present invention, for the particularity of hydraulic pressure component, devises special circuit, can be widely applied for high temperature open fire radiation occasion and the inflammable and explosive pollution-free all kinds of hoistable platforms waited under environment.
Description
Technical field
The present invention relates to a kind of hydraulic lifting system more particularly to a kind of hoistable platform Pure water hydraulic drive systems.
Background technology
Hydraulic elevating platform is widely used in various engineering places, and fluid power system possesses following as its core system
Main feature：1) ensure being perfectly safe reliably in lifting process.Jacking system generally carries larger heavy burden or directly closes
It is to personal safety, therefore hydraulic lifting system should ensure that be not in unexpected situation cause weight to decline suddenly；2) weight is lifted
Certain time reliably can be latched or is latched after object；3) rise and decrease speed is adjustable or part is adjustable.In order to ensure personnel's
Comfort avoids the impact being likely to occur, and jacking system will have preferable stationarity in speed regulation process, should not occur
Violent vibratory impulse.
Traditional hydraulic lifting system is using mineral type hydraulic oil as working media, but there are inflammable and dirty for hydraulic oil
Contaminating two big critical defects so that it not only is difficult to promote and apply in industries such as food, beverage, medicine, electronics, packagings, and
And also gradually application of the forfeiture in the high temperature open fire occasion such as metallurgy, hot rolling, casting and the inferior inflammable and explosive environment of coal mine.Closely
Nian Lai, based on people to ecological environmental protection, safety in production and energy saving pay attention to day by day, with natural fresh water, seawater or
Tap water proxy mineral oil is as the warm that the Pure Water Hydraulic Drive Technology of hydraulic work system medium is international Hydraulic Industry common concern
Point is applied in above-mentioned field.
Hydraulic Drive Technology has been obtained for adequately paying attention in foreign country at present, and achieves many breakthroughs,
Their industrial circle also plays an increasingly important role.Since the country starts late to the research of water hydraulics, technology
It is not mature enough compared to hydraulic technology, so that the application of Hydraulic Drive Technology at home is also confined to several special occasions.It will be pure
Water hydraulics technology is applied in hoistable platform, and solving the problems, such as Practical Project, there are no effectively promoted at home.
Invention content
The purpose of the present invention is to provide a kind of hoistable platform Pure water hydraulic drive system, solve traditional in background technology
The requirement of the existing pollution of hydraulic lifting system and inflammable two large problems and guarantee hoistable platform to its drive system, Neng Gouman
The requirement of hoistable platform under a variety of occasions of foot.
The technical solution adopted by the present invention to solve the technical problems includes：A kind of hoistable platform pure water hydraulics driving system
System, it includes：Filter, plunger pump, variable-frequency motor, overflow valve, the first bi-bit bi-pass reversal valve, check valve, the first proportioning valve,
Accumulator, the second bi-bit bi-pass reversal valve, hydraulic control one-way valve, the second proportioning valve, three position four-way directional control valve, hydraulic cylinder, water tank；
Wherein variable-frequency motor is connected with plunger pump, and driving plug pump work, the water inlet of filter is connected to water tank, filter
Water outlet be connected to the water sucking mouth of plunger pump, the water outlet of plunger pump and the water inlet of overflow valve, the first bi-bit bi-pass commutate
The control mouth of a river connection of the water inlet of valve, the water inlet of check valve, hydraulic control one-way valve, the water outlet of overflow valve, the one or two two
The water outlet of logical reversal valve is connected to water tank, the water inlet of the water outlet of check valve and the first proportioning valve, the mouth of a river of accumulator, the
The water inlet of two bi-bit bi-pass reversal valves is connected to, and the water outlet of the second bi-bit bi-pass reversal valve and the water inlet of hydraulic control one-way valve connect
Logical, the water outlet of hydraulic control one-way valve is connected to water tank, and the water outlet of the first proportioning valve and the water inlet of three position four-way directional control valve connect
Logical, the first work mouth of a river of three position four-way directional control valve is connected to the rodless cavity of hydraulic cylinder, the second work of three position four-way directional control valve
The mouth of a river blocks, and the water return outlet of three position four-way directional control valve is connected to the water inlet of the second proportioning valve, the water outlet of the second proportioning valve with
Water tank is connected to, and hydraulic cylinder rod chamber is directly connected to water tank..
The invention has the advantages that：The present invention uses hydraulic transmission medium of the deionized water as system, selects
Three position four-way directional control valve and normally closed type proportioning valve accurately control water hydraulic cylinder piston bar and stretch out and retraction movement speed in pure water hydraulics
Degree has very high reliability.Using accumulator as auxiliary power source, the installed power of system is reduced and can be in electricity
It is used as emergency power supply under pump fault condition, improves the safety of system.Pure water its intrinsic spatter property and anti-flammability are full
Safety under sufficient specific condition and environmental protection requirement make such hydraulic driving system can be applied to high temperature open fire radiation occasion
And all kinds of hoistable platforms under inflammable and explosive pollution-free equal environment.
Description of the drawings
The invention will be further described below in conjunction with the accompanying drawings：
Fig. 1 is the principle schematic diagram of the present invention；
In figure：Filter 1, plunger pump 2, variable-frequency motor 3, overflow valve 4, the first bi-bit bi-pass reversal valve 5, check valve 6,
One proportioning valve 7, accumulator 8, the second bi-bit bi-pass reversal valve 9, hydraulic control one-way valve 10, the second proportioning valve 11,3-position 4-way commutation
Valve 12, hydraulic cylinder 13, water tank 14.
Specific implementation mode
As shown in Fig. 1, hoistable platform Pure water hydraulic drive system of the present invention includes：Filter 1, plunger pump 2, variable-frequency electric
Machine 3, overflow valve 4, the first bi-bit bi-pass reversal valve 5, check valve 6, the first proportioning valve 7, accumulator 8, the commutation of the second bi-bit bi-pass
Valve 9, hydraulic control one-way valve 10, the second proportioning valve 11, three position four-way directional control valve 12, hydraulic cylinder 13, water tank 14.
Wherein, variable-frequency motor 3 is connected with plunger pump 2, and driving plunger pump 2 works, the water inlet T of filter 11With water tank 14
Connection, the water outlet P of filter 11With the water sucking mouth T of plunger pump 22Connection, the water outlet P of plunger pump 22With the water inlet of overflow valve 4
Mouth P3, the first bi-bit bi-pass reversal valve 5 water inlet P4, check valve 6 water inlet P5, hydraulic control one-way valve 10 control mouth of a river K1
Connection, the water outlet T of overflow valve 43, the first bi-bit bi-pass reversal valve 5 water outlet A1It is connected to water tank 14, the water outlet of check valve 6
Mouth P3With the water inlet P of the first proportioning valve 77, accumulator 8 mouth of a river P8, the second bi-bit bi-pass reversal valve 9 water inlet P9Connection,
The water outlet A of second bi-bit bi-pass reversal valve 92With the water inlet P of hydraulic control one-way valve 1010Connection, the water outlet of hydraulic control one-way valve 10
Mouth P11It is connected to water tank 14, the water outlet A of the first proportioning valve 73With the water inlet P of three position four-way directional control valve 1213Connection, three four
First work mouth of a river A of logical reversal valve 125It is connected to the rodless cavity of hydraulic cylinder 13, the second working water of three position four-way directional control valve 12
Mouth B1To block state, the water return outlet T of three position four-way directional control valve 124With the water inlet P of the second proportioning valve 1112Connection, the second ratio
The water outlet A of example valve 114It is connected to water tank 14, hydraulic cylinder rod chamber is directly connected to water tank 14..
The course of work of the present invention is as follows：
Under original state, the first bi-bit bi-pass reversal valve 5, the first proportioning valve 7, the second bi-bit bi-pass reversal valve 9, second ratio
Example valve 11, three position four-way directional control valve 12 are all in off-position, and hydraulic cylinder 13 is in locking states, and hoistable platform is static at this time.
Pumping station system, which is powered, starts to work, and pumping station system uses the power source mode of single pump+frequency control+overflow valve supply water, simultaneously
In order to improve filtering accuracy, the system failure is reduced, increases at the pumping mouth of a river and filters.Variable-frequency motor 3 starts to drive plunger pump 2 first
Work, plunger pump export high pressure water and enter inside accumulator by check valve 6, complete the fliud flushing process of accumulator.Work as accumulator
When needing off-load, electric-motor pump is stopped, and the first bi-bit bi-pass reversal valve 5 is powered on, and completes hydraulic control one-way valve 10 and controls water
Mouth K1The off-load at place works, and herein, the second bi-bit bi-pass reversal valve 9 is powered on, and high pressure water passes through second successively in accumulator
10 reflow tank of bi-bit bi-pass reversal valve 9 and hydraulic control one-way valve completes the off-load work of accumulator.
Platform uphill process：Pure water hydraulic drive system is started to work, and system selects 3-position 4-way in pure water hydraulics to commutate
Valve and normally closed type proportioning valve accurately control water hydraulic cylinder piston bar and stretch out movement velocity.First proportioning valve 7 and 3-position 4-way commutation
The left position electromagnet of valve 12 is powered, and plunger pump exports high pressure water and passes through check valve 6, the first proportioning valve 7,3-position 4-way commutation successively
Valve 12 enters the rodless cavity of hydraulic cylinder, pushes piston upwards, the direct reflow tank of water in hydraulic cylinder rod chamber.On platform
Capable speed is set up by the first proportioning valve 7 to meet requirement of system design.
Platform declines process：Platform declines by dead weight, the right position electricity of the second proportioning valve 11 and three position four-way directional control valve 12
Magnet is powered, and the high pressure water in hydraulic cylinder rodless cavity starts off-load, is flowed back to through three position four-way directional control valve 12,2 second proportioning valves 11
Water tank, piston decline under the effect of gravity, and the decrease speed changing rule and end speed of piston are set up by the second proportioning valve 11,
It can ensure platform stable movement during declining.
Claims (1)
1. a kind of hoistable platform Pure water hydraulic drive system, which is characterized in that it includes：Filter（1）, plunger pump（2）, frequency conversion
Motor（3）, overflow valve（4）, the first bi-bit bi-pass reversal valve（5）, check valve（6）, the first proportioning valve（7）, accumulator（8）,
Two bi-bit bi-pass reversal valves（9）, hydraulic control one-way valve（10）, the second proportioning valve（11）, three position four-way directional control valve（12）, hydraulic cylinder
（13）, water tank（14）；
Wherein, variable-frequency motor（3）With plunger pump（2）It is connected, filter（1）Water inlet and water tank（14）Connection, filter（1）
Water outlet and plunger pump（2）Water sucking mouth connection, plunger pump（2）Water outlet respectively with overflow valve（4）Water inlet, first
Bi-bit bi-pass reversal valve（5）Water inlet, check valve（6）Water inlet, hydraulic control one-way valve（10）The control mouth of a river connection, overflow
Valve（4）Water outlet, the first bi-bit bi-pass reversal valve（5）Water outlet and water tank（14）Connection, check valve（6）Water outlet point
Not with the first proportioning valve（7）Water inlet, accumulator（8）The mouth of a river, the second bi-bit bi-pass reversal valve（9）Water inlet connection,
Second bi-bit bi-pass reversal valve（9）Water outlet and hydraulic control one-way valve（10）Water inlet connection, hydraulic control one-way valve（10）Go out
The mouth of a river and water tank（14）Connection, the first proportioning valve（7）Water outlet and three position four-way directional control valve（12）Water inlet connection, three
Four-way reversing valve（12）The first work mouth of a river and hydraulic cylinder（13）Rodless cavity connection, three position four-way directional control valve（12）Second
The work mouth of a river blocks, three position four-way directional control valve（12）Water return outlet and the second proportioning valve（11）Water inlet connection, the second ratio
Valve（11）Water outlet and water tank（14）Connection；Hydraulic cylinder rod chamber is directly and water tank（14）Connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710288269.8A CN107120325B (en) | 2017-04-27 | 2017-04-27 | Hoistable platform Pure water hydraulic drive system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710288269.8A CN107120325B (en) | 2017-04-27 | 2017-04-27 | Hoistable platform Pure water hydraulic drive system |
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| Publication Number | Publication Date |
|---|---|
| CN107120325A CN107120325A (en) | 2017-09-01 |
| CN107120325B true CN107120325B (en) | 2018-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710288269.8A Active CN107120325B (en) | 2017-04-27 | 2017-04-27 | Hoistable platform Pure water hydraulic drive system |
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| Country | Link |
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| CN (1) | CN107120325B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109973449B (en) * | 2019-03-01 | 2020-07-21 | 武汉船用机械有限责任公司 | Hydraulic control system of lifting platform |
| CN111594492A (en) * | 2020-05-27 | 2020-08-28 | 珠海方博科技有限公司 | Control method and system for ground service system |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH622067A5 (en) * | 1978-03-13 | 1981-03-13 | Interbrev Sa | Hydraulic circuit for controlling the injection piston of an oil-hydraulic moulding machine |
| JP2000329105A (en) * | 1999-05-17 | 2000-11-28 | Atec:Kk | Hydraulic cylinder driving device |
| JP2008157399A (en) * | 2006-12-26 | 2008-07-10 | Nabtesco Corp | Hydraulic cylinder driving circuit |
| CN101799024A (en) * | 2010-03-30 | 2010-08-11 | 中国船舶重工集团公司第七〇二研究所 | Synchronous hydraulic transmission system |
| CN102897687A (en) * | 2012-09-27 | 2013-01-30 | 浙江大学 | Pure water hydraulic drive system of lifting platform |
| CN203743139U (en) * | 2014-03-11 | 2014-07-30 | 山河智能装备股份有限公司 | Multi-cylinder synchronous electrohydraulic control system under load varying condition |
| CN104828721A (en) * | 2015-05-05 | 2015-08-12 | 中国水产科学研究院渔业机械仪器研究所 | Self-balancing compensation system, marine crane and control method thereof |
| CN104847738A (en) * | 2015-06-03 | 2015-08-19 | 宁波恒力液压股份有限公司 | Parallel energy-saving technology based high-frequency single-acting hydraulic cylinder durability test device and method |
| CN104675773B (en) * | 2015-03-06 | 2016-11-23 | 浙江大学 | A kind of roll squeezer pure water hydraulics system and method for roll-in speed control accurate |
-
2017
- 2017-04-27 CN CN201710288269.8A patent/CN107120325B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH622067A5 (en) * | 1978-03-13 | 1981-03-13 | Interbrev Sa | Hydraulic circuit for controlling the injection piston of an oil-hydraulic moulding machine |
| JP2000329105A (en) * | 1999-05-17 | 2000-11-28 | Atec:Kk | Hydraulic cylinder driving device |
| JP2008157399A (en) * | 2006-12-26 | 2008-07-10 | Nabtesco Corp | Hydraulic cylinder driving circuit |
| CN101799024A (en) * | 2010-03-30 | 2010-08-11 | 中国船舶重工集团公司第七〇二研究所 | Synchronous hydraulic transmission system |
| CN102897687A (en) * | 2012-09-27 | 2013-01-30 | 浙江大学 | Pure water hydraulic drive system of lifting platform |
| CN203743139U (en) * | 2014-03-11 | 2014-07-30 | 山河智能装备股份有限公司 | Multi-cylinder synchronous electrohydraulic control system under load varying condition |
| CN104675773B (en) * | 2015-03-06 | 2016-11-23 | 浙江大学 | A kind of roll squeezer pure water hydraulics system and method for roll-in speed control accurate |
| CN104828721A (en) * | 2015-05-05 | 2015-08-12 | 中国水产科学研究院渔业机械仪器研究所 | Self-balancing compensation system, marine crane and control method thereof |
| CN104847738A (en) * | 2015-06-03 | 2015-08-19 | 宁波恒力液压股份有限公司 | Parallel energy-saving technology based high-frequency single-acting hydraulic cylinder durability test device and method |
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| Publication number | Publication date |
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| CN107120325A (en) | 2017-09-01 |
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