CN104405702A - Feedback type two-way throttle synchronizing loop of two-column gantry lifter - Google Patents
Feedback type two-way throttle synchronizing loop of two-column gantry lifter Download PDFInfo
- Publication number
- CN104405702A CN104405702A CN201410475869.1A CN201410475869A CN104405702A CN 104405702 A CN104405702 A CN 104405702A CN 201410475869 A CN201410475869 A CN 201410475869A CN 104405702 A CN104405702 A CN 104405702A
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- CN
- China
- Prior art keywords
- valve
- way
- hydraulic cylinder
- oil hydraulic
- flow control
- Prior art date
- 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
-
- 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
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/40—Flow control
Abstract
The invention discloses a feedback type two-way throttle synchronizing loop of a two-column gantry lifter, and belongs to the field of hydraulic transmission. The feedback type two-way throttle synchronizing loop of the two-column gantry lifter comprises an oil tank, a hydraulic pump, an overflow valve, a reversing valve, a hydraulic cylinder, a displacement detector, a two-way collector control loop, one-way valves and a speed regulating valve, wherein the two-way collector control loop is serially connected to a connecting oil way of the hydraulic cylinder and the reversing valve, and consists of the one-way valves and the speed regulating valve; the internal of the two-way collector control loop is divided into two branches; each of the branches is formed by serially connecting two one-way valves; the two branches are connected through the speed regulating valve; the speed regulating valve is controlled by the displacement detector; and the displacement detector is arranged at the top end of the hydraulic cylinder. The feedback type two-way throttle synchronizing loop of the two-column gantry lifter solves the problem of difficult synchronization of ascending and descending speed and displacements of the hydraulic cylinder of a traditional two-column gantry lifter in the working process, and has the advantages of simple structure, reasonable design and easy production.
Description
Technical field
The invention belongs to hydraulic transmission field, more particularly, relate to a kind of synchronizing circuit of lifting machine hydraulic system.
Background technique
Along with the development of automobile industry, auto repair becomes an emerging industry gradually with maintenance.Wherein lifting machine is as the important tool in auto repair and servicing operations, have also been obtained and develops faster.Automobile is mainly brought up to another safe altitude from a safe altitude by lifting machine, so that manual operation and maintenance.Current lifting machine has a lot of type, can be divided into mechanical transmission and hydraulic transmission according to the kind of drive.Mechanical transmission structure is simple, low price, but lifting weight is restricted, and leading screw or work nut slide fastener easily occur, and there is larger potential safety hazard.And hydraulic transmission lifting machine Safety performance good, operate steadily, easy to maintenance and working efficiency is high, be current lifting machine transmission use mainstream type.For the hydraulic system of two post gantry lifting machines, it requires that in lifting process the displacement of each oil hydraulic cylinder must be consistent with speed, to make lifting steadily.
Summary of the invention
For existing two post gantry lifting machines in the course of the work, the problem that speed, displacement that oil hydraulic cylinder rises and declines are not easily synchronous, the invention provides a kind of two post gantry lifting machine reaction type bidirectional throttle synchronizing circuits, by bidirectional current-collecting control loop, throttling control is carried out to it, and increase the Displacement Feedback link of oil hydraulic cylinder, improve its synchronization accuracy.
For solving the problem, the present invention adopts following technological scheme.
A kind of two post gantry lifting machine reaction type bidirectional throttle synchronizing circuits, comprise fuel tank, oil hydraulic pump, relief valve, selector valve, oil hydraulic cylinder, displacement detector, bidirectional current-collecting control loop, one-way valve, series flow control valve, the import oil pipe of described oil hydraulic pump is connected with fuel tank, outlet oil pipe respectively with relief valve, selector valve is connected, described relief valve is connected fuel tank with the return tube of selector valve, described bidirectional current-collecting control loop is connected on the connection oil circuit of oil hydraulic cylinder and selector valve, described bidirectional current-collecting control loop is by one-way valve, series flow control valve forms, its inside is divided into two branch roads, each branch road is in series by two one-way valves, two branch roads are connected by series flow control valve, described series flow control valve is controlled by displacement detector, described displacement detector is arranged on oil hydraulic cylinder top.
Described selector valve is three-position four-way electromagnetic directional valve, and its Median Function is O type, and described series flow control valve is proportional velocity regulating valve.
Compared to prior art, beneficial effect of the present invention is:
(1) the present invention is by increasing the bidirectional current-collecting control loop be made up of one-way valve and series flow control valve in the loop, makes the two-way equal of oil hydraulic cylinder to carry out throttling control.Simultaneously in the movement process of two cylinders, detect oil hydraulic cylinder displacement at any time by displacement detector, and by regulating proportional velocity regulating valve, make the flow of two oil hydraulic cylinders consistent, owing to adding feedback element, its synchronization accuracy obtains further raising.
(2) structure of the present invention is simple, reasonable in design, is easy to manufacture.
Accompanying drawing explanation
Fig. 1 is hydraulic scheme of the present invention.
In figure: 1-fuel tank, 2-oil hydraulic pump, 3-relief valve, 4-selector valve, 5-oil hydraulic cylinder, 6-displacement detector, 7-bidirectional current-collecting control loop, 8-one-way valve, 9-series flow control valve.
Embodiment
Describe the present invention below in conjunction with accompanying drawing.
As shown in Figure 1, two post gantry lifting machine reaction type bidirectional throttle synchronizing circuits comprise fuel tank 1, oil hydraulic pump 2, relief valve 3, selector valve 4, oil hydraulic cylinder 5, displacement detector 6, bidirectional current-collecting control loop 7, one-way valve 8, series flow control valve 9, the import oil pipe of described oil hydraulic pump 2 is connected with fuel tank 1, outlet oil pipe respectively with relief valve 3, selector valve 4 is connected, described relief valve 3 is connected fuel tank 1 with the return tube of selector valve 4, described bidirectional current-collecting control loop 7 is connected on oil hydraulic cylinder 5 with on the connection oil circuit of selector valve 4, described bidirectional current-collecting control loop 7 is by one-way valve 8, series flow control valve 9 forms, its inside is divided into two branch roads, each branch road is in series by two one-way valves 8, two branch roads are connected by series flow control valve 9, described series flow control valve 9 is controlled by displacement detector 6, described displacement detector 6 is arranged on oil hydraulic cylinder 5 top.
Described selector valve 4 is three-position four-way electromagnetic directional valve, and its Median Function is O type, and described series flow control valve 9 is proportional velocity regulating valve.
embodiment 1
As shown in Figure 1, two post gantry lifting machine reaction type bidirectional throttle synchronizing circuits comprise fuel tank 1, oil hydraulic pump 2, relief valve 3, selector valve 4, oil hydraulic cylinder 5, displacement detector 6, bidirectional current-collecting control loop 7, one-way valve 8, series flow control valve 9, the import oil pipe of described oil hydraulic pump 2 is connected with fuel tank 1, outlet oil pipe respectively with relief valve 3, selector valve 4 is connected, described relief valve 3 is connected fuel tank 1 with the return tube of selector valve 4, described bidirectional current-collecting control loop 7 is connected on oil hydraulic cylinder 5 with on the connection oil circuit of selector valve 4, described bidirectional current-collecting control loop 7 is by one-way valve 8, series flow control valve 9 forms, its inside is divided into two branch roads, each branch road is in series by two one-way valves 8, two branch roads are connected by series flow control valve 9, described series flow control valve 9 is controlled by displacement detector 6, described displacement detector 6 is arranged on oil hydraulic cylinder 5 top.
Described selector valve 4 is three-position four-way electromagnetic directional valve, and its Median Function is O type, and described series flow control valve 9 is proportional velocity regulating valve, and described relief valve 3 is direct-acting overflow valve, and described oil hydraulic pump 2 adopts gear pump.
Claims (3)
1. a post gantry lifting machine reaction type bidirectional throttle synchronizing circuit, comprise fuel tank (1), oil hydraulic pump (2), relief valve (3), selector valve (4), oil hydraulic cylinder (5), displacement detector (6), bidirectional current-collecting control loop (7), one-way valve (8), series flow control valve (9), it is characterized in that, the import oil pipe of described oil hydraulic pump (2) is connected with fuel tank (1), outlet oil pipe respectively with relief valve (3), selector valve (4) is connected, described relief valve (3) is connected fuel tank (1) with the return tube of selector valve (4), described bidirectional current-collecting control loop (7) is connected on oil hydraulic cylinder (5) with on the connection oil circuit of selector valve (4), described bidirectional current-collecting control loop (7) is by one-way valve (8), series flow control valve (9) forms, its inside is divided into two branch roads, each branch road is in series by two one-way valves (8), two branch roads are connected by series flow control valve (9), described series flow control valve (9) is controlled by displacement detector (6), described displacement detector (6) is arranged on oil hydraulic cylinder (5) top.
2. two post gantry lifting machine reaction type bidirectional throttle synchronizing circuits according to claim 1, it is characterized in that, described selector valve (4) is three-position four-way electromagnetic directional valve, and its Median Function is O type.
3. two post gantry lifting machine reaction type bidirectional throttle synchronizing circuits according to claim 1, it is characterized in that, described series flow control valve (9) is proportional velocity regulating valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410475869.1A CN104405702A (en) | 2014-09-18 | 2014-09-18 | Feedback type two-way throttle synchronizing loop of two-column gantry lifter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410475869.1A CN104405702A (en) | 2014-09-18 | 2014-09-18 | Feedback type two-way throttle synchronizing loop of two-column gantry lifter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104405702A true CN104405702A (en) | 2015-03-11 |
Family
ID=52643355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410475869.1A Pending CN104405702A (en) | 2014-09-18 | 2014-09-18 | Feedback type two-way throttle synchronizing loop of two-column gantry lifter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104405702A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1055421A (en) * | 1963-02-28 | 1967-01-18 | Alexander Edward Townsend | Load-handling device |
| SU1505692A1 (en) * | 1987-02-02 | 1989-09-07 | Минское специальное конструкторское бюро протяжных станков | Machine for sawing with circular saws and frictional saw discs |
| CN102278124A (en) * | 2011-06-24 | 2011-12-14 | 北京市三一重机有限公司 | Energy-saving hydraulic shield propulsion system |
| CN202089710U (en) * | 2011-06-10 | 2011-12-28 | 长沙中联重工科技发展股份有限公司 | Tower crane climbing frame and tower crane comprising same |
| CN103569882A (en) * | 2013-11-19 | 2014-02-12 | 南京工业大学 | Hydraulic lifting system of attached tower crane |
-
2014
- 2014-09-18 CN CN201410475869.1A patent/CN104405702A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1055421A (en) * | 1963-02-28 | 1967-01-18 | Alexander Edward Townsend | Load-handling device |
| SU1505692A1 (en) * | 1987-02-02 | 1989-09-07 | Минское специальное конструкторское бюро протяжных станков | Machine for sawing with circular saws and frictional saw discs |
| CN202089710U (en) * | 2011-06-10 | 2011-12-28 | 长沙中联重工科技发展股份有限公司 | Tower crane climbing frame and tower crane comprising same |
| CN102278124A (en) * | 2011-06-24 | 2011-12-14 | 北京市三一重机有限公司 | Energy-saving hydraulic shield propulsion system |
| CN103569882A (en) * | 2013-11-19 | 2014-02-12 | 南京工业大学 | Hydraulic lifting system of attached tower crane |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150311 |