CN104386617A - Parallel speed conversion loop of gantry lifting machine - Google Patents
Parallel speed conversion loop of gantry lifting machine Download PDFInfo
- Publication number
- CN104386617A CN104386617A CN201410475702.5A CN201410475702A CN104386617A CN 104386617 A CN104386617 A CN 104386617A CN 201410475702 A CN201410475702 A CN 201410475702A CN 104386617 A CN104386617 A CN 104386617A
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- China
- Prior art keywords
- valve
- change
- over valve
- oil
- lifting machine
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Classifications
-
- 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
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a parallel speed conversion loop of a gantry lifting machine, and belongs to the field of hydraulic transmission. The loop comprises an oil tank, a hydraulic pump, an overflow valve, a reversing valve A, a hydraulic cylinder, a reversing valve B, a reversing valve C, a speed adjusting valve A and a speed adjusting valve B, wherein an inlet oil pipe of the hydraulic pump is connected with the oil tank, and an outlet oil pipe is respectively connected with the overflow valve and the reversing valve A; the overflow valve and an oil return pipe of the reversing valve A are connected with the oil tank; an oil port A of the reversing valve A is divided into three oil ways; one of the oil ways is connected with the hydraulic cylinder after being serially connected with the reversing valve C; the second of the oil ways is connected with the hydraulic cylinder after being serially connected with the speed adjusting valve A and the reversing valve B; and the third of the oil ways is connected with the hydraulic cylinder after being serially connected with the speed adjusting valve B and the reversing valve C. The loop solves the problem of inconvenience for operation because of the gantry lifting machine being incapable of providing different feeding speeds according to different operation requirements in the working process, and has the advantages of simple structure, reasonable design and easy production.
Description
Technical field
The invention belongs to hydrostatic drive field, more particularly, relate to a kind of rate conversion loop of lifting machine hydraulic efficiency pressure system.
Background technology
Along with the development of automobile industry, vehicle maintenance and repair becomes an emerging industry gradually with maintenance.Wherein lifting machine is as the important tool in vehicle maintenance and 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 drive and hydrostatic drive according to type 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 hydrostatic drive lifting machine safety performance good, operate steadily, easy to maintenance and work efficiency is high, be current lifting machine transmission use mainstream type.For the hydraulic efficiency pressure system of gantry lifting machine, the Feeding speed that hydraulic actuating cylinder is different because need of work has, as the adjustment that F.F. and work are entered, realizes speed governing by the flow changing Hydraulic Pump, is not generally used because it has increased substantially cost.
Summary of the invention
For existing gantry lifting machine in the course of the work, can not according to different operation requirements, different Feeding speeds is provided, and cause unhandy problem, the invention provides a kind of gantry lifting machine rate conversion loop in parallel, by two governor valves in parallel in the loop, realize the adjustment to Feeding speed.
For solving the problem, the present invention adopts following technical scheme.
A kind of gantry lifting machine rate conversion loop in parallel, comprise fuel tank, Hydraulic Pump, by pass valve, change-over valve A, hydraulic actuating cylinder, change-over valve B, change-over valve C, governor valve A, governor valve B, the import oil pipe of described Hydraulic Pump is connected with fuel tank, outlet oil pipe respectively with by pass valve, change-over valve A is connected, described by pass valve is connected fuel tank with the oil return pipe of change-over valve A, the A hydraulic fluid port of described change-over valve A is divided into three oil circuits, article one, be connected with hydraulic actuating cylinder after oil circuit series connection change-over valve C, , an oil circuit cascade control valve A according to this, be connected with hydraulic actuating cylinder after change-over valve B, another oil circuit is cascade control valve B according to this, be connected with hydraulic actuating cylinder after change-over valve B.
Described change-over valve A is three-position four-way electromagnetic directional valve, and its Median Function is O type, and described change-over valve B, change-over valve C are bi-bit bi-pass solenoid directional control valve.
Compared to prior art, beneficial effect of the present invention is:
(1) the present invention passes through two governor valves in parallel in the loop, and is controlled the mode of operation of governor valve by change-over valve, and make it possible to carry out multistage adjustment to the Feeding speed of hydraulic actuating cylinder, it is more convenient to operate.
(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-Hydraulic Pump, 3-by pass valve, 4-change-over valve A, 5-hydraulic actuating cylinder, 6-change-over valve B, 7-change-over valve C, 8-governor valve A, 9-governor valve B.
Detailed description of the invention
Describe the present invention below in conjunction with accompanying drawing.
As shown in Figure 1, gantry lifting machine rate conversion loop in parallel comprises fuel tank 1, Hydraulic Pump 2, by pass valve 3, change-over valve A4, hydraulic actuating cylinder 5, change-over valve B6, change-over valve C7, governor valve A8, governor valve B9, the import oil pipe of described Hydraulic Pump 2 is connected with fuel tank 1, outlet oil pipe respectively with by pass valve 3, change-over valve A4 is connected, described by pass valve 3 is connected fuel tank 1 with the oil return pipe of change-over valve A4, the A hydraulic fluid port of described change-over valve A4 is divided into three oil circuits, article one, be connected with hydraulic actuating cylinder 5 after oil circuit series connection change-over valve C7, , an oil circuit cascade control valve A8 according to this, be connected with hydraulic actuating cylinder 5 after change-over valve B6, another oil circuit is cascade control valve B9 according to this, be connected with hydraulic actuating cylinder 5 after change-over valve B6.
Described change-over valve A4 is three-position four-way electromagnetic directional valve, and its Median Function is O type, and described change-over valve B6, change-over valve C7 are bi-bit bi-pass solenoid directional control valve.
embodiment 1
As shown in Figure 1, gantry lifting machine rate conversion loop in parallel comprises fuel tank 1, Hydraulic Pump 2, by pass valve 3, change-over valve A4, hydraulic actuating cylinder 5, change-over valve B6, change-over valve C7, governor valve A8, governor valve B9, the import oil pipe of described Hydraulic Pump 2 is connected with fuel tank 1, outlet oil pipe respectively with by pass valve 3, change-over valve A4 is connected, described by pass valve 3 is connected fuel tank 1 with the oil return pipe of change-over valve A4, the A hydraulic fluid port of described change-over valve A4 is divided into three oil circuits, article one, be connected with hydraulic actuating cylinder 5 after oil circuit series connection change-over valve C7, , an oil circuit cascade control valve A8 according to this, be connected with hydraulic actuating cylinder 5 after change-over valve B6, another oil circuit is cascade control valve B9 according to this, be connected with hydraulic actuating cylinder 5 after change-over valve B6.
Described change-over valve A4 is three-position four-way electromagnetic directional valve, and its Median Function is O type, and described change-over valve B6, change-over valve C7 are bi-bit bi-pass solenoid directional control valve, and described Hydraulic Pump 2 is plunger pump, and described by pass valve 3 is direct-acting overflow valve.
Claims (3)
1. a gantry lifting machine rate conversion loop in parallel, comprise fuel tank (1), Hydraulic Pump (2), by pass valve (3), change-over valve A(4), hydraulic actuating cylinder (5), change-over valve B(6), change-over valve C(7), governor valve A(8), governor valve B(9), it is characterized in that, the import oil pipe of described Hydraulic Pump (2) is connected with fuel tank (1), outlet oil pipe respectively with by pass valve (3), change-over valve A(4) be connected, described by pass valve (3) and change-over valve A(4) oil return pipe be connected fuel tank (1), described change-over valve A(4) A hydraulic fluid port be divided into three oil circuits, , an oil circuit series connection change-over valve C(7) be connected with hydraulic actuating cylinder (5) afterwards, , an oil circuit cascade control valve A(8 according to this), change-over valve B(6) be connected with hydraulic actuating cylinder (5) afterwards, another oil circuit is cascade control valve B(9 according to this), change-over valve B(6) be connected with hydraulic actuating cylinder (5) afterwards.
2. gantry lifting machine according to claim 1 rate conversion loop in parallel, is characterized in that, described change-over valve A(4) be three-position four-way electromagnetic directional valve, its Median Function is O type.
3. gantry lifting machine according to claim 1 rate conversion loop in parallel, is characterized in that, described change-over valve B(6), change-over valve C(7) be bi-bit bi-pass solenoid directional control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410475702.5A CN104386617A (en) | 2014-09-18 | 2014-09-18 | Parallel speed conversion loop of gantry lifting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410475702.5A CN104386617A (en) | 2014-09-18 | 2014-09-18 | Parallel speed conversion loop of gantry lifting machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104386617A true CN104386617A (en) | 2015-03-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410475702.5A Pending CN104386617A (en) | 2014-09-18 | 2014-09-18 | Parallel speed conversion loop of gantry lifting machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104386617A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112524107A (en) * | 2020-12-18 | 2021-03-19 | 山东泰丰智能控制股份有限公司 | Micro-speed hydraulic control system |
| CN112581846A (en) * | 2020-12-04 | 2021-03-30 | 湖南汉坤实业有限公司 | Support formula active experience platform control system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006300280A (en) * | 2005-04-25 | 2006-11-02 | Kobelco Cranes Co Ltd | Hydraulic cylinder circuit |
| CN203384136U (en) * | 2013-06-05 | 2014-01-08 | 浙江工商职业技术学院 | Speed exchange circuit with parallel speed control valves |
| CN203516244U (en) * | 2013-08-02 | 2014-04-02 | 浙江工商职业技术学院 | Fast feed and working feed circuit |
| CN203516242U (en) * | 2013-08-02 | 2014-04-02 | 浙江工商职业技术学院 | Hydraulic circuit device with two throttling valves |
-
2014
- 2014-09-18 CN CN201410475702.5A patent/CN104386617A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006300280A (en) * | 2005-04-25 | 2006-11-02 | Kobelco Cranes Co Ltd | Hydraulic cylinder circuit |
| CN203384136U (en) * | 2013-06-05 | 2014-01-08 | 浙江工商职业技术学院 | Speed exchange circuit with parallel speed control valves |
| CN203516244U (en) * | 2013-08-02 | 2014-04-02 | 浙江工商职业技术学院 | Fast feed and working feed circuit |
| CN203516242U (en) * | 2013-08-02 | 2014-04-02 | 浙江工商职业技术学院 | Hydraulic circuit device with two throttling valves |
Non-Patent Citations (1)
| Title |
|---|
| 屈圭: "《液压与气压传动》", 31 January 2002, 机械工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112581846A (en) * | 2020-12-04 | 2021-03-30 | 湖南汉坤实业有限公司 | Support formula active experience platform control system |
| CN112524107A (en) * | 2020-12-18 | 2021-03-19 | 山东泰丰智能控制股份有限公司 | Micro-speed hydraulic control system |
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Application publication date: 20150304 |