CN104533868A - Combined reversing valve - Google Patents
Combined reversing valve Download PDFInfo
- Publication number
- CN104533868A CN104533868A CN201410770477.8A CN201410770477A CN104533868A CN 104533868 A CN104533868 A CN 104533868A CN 201410770477 A CN201410770477 A CN 201410770477A CN 104533868 A CN104533868 A CN 104533868A
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- China
- Prior art keywords
- valve
- mouth
- connector
- parallel
- connection mouth
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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
- 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
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
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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 combined reversing valve. The combined reversing valve comprises a valve block provided with a connector H1, a connector H2, a connector B1, a connector B2, an oil port H and an oil port B. Synchronous valves (8) which are connected to the connector H1 and the connector H2 respectively are communicated with the oil port H through a second one-way valve (6) after being connected in parallel. First one-way valves (2) connected to the connector H1 and the connector H2 respectively are communicated with the oil port H through a second throttle valve (7) after being connected in parallel. The connector B1 and the connector B2 are each communicated with the oil port B sequentially through a speed regulating valve (3) and a reversing valve (5). By means of the combined reversing valve, it can be ensured that two ejecting oil cylinders of a tower machine synchronously rise and fall and the asynchrony of the two ejecting oil cylinders can be corrected at any time, and the combined reversing valve is used for the tower machine with the two ejecting oil cylinders.
Description
Technical field
The present invention relates to a kind of combined directional valve, particularly relating to a kind of combined directional valve for ensureing tower machine two jacking cylinder synchronization lifting.
Background technique
The hydraulic climbing mechanism of tower machine have simple structure, reliable operation, steadily, the plurality of advantages such as safety, handiness, climbing speed be fast, be widely used.Wherein, according to the quantity of jacking cylinder, can be divided into single cylinder and twin-tub two kinds, single cylinder is mainly used on tower crane, and twin-tub is mainly used on large-scale movable arm tower crane.
The control valve group of traditional tower crane twin-tub jack-up system, when tower machine rises tower and fall tower, two jacking cylinder synchronisms are bad, and can not correct at any time.
Summary of the invention
In view of the foregoing defects the prior art has, the present invention aims to provide and a kind ofly can ensure tower machine two jacking cylinder synchronization lifting and can at any time to the asynchronous combined directional valve corrected of two jacking cylinders.
To achieve these goals, the present invention by the following technical solutions: it comprises the valve block which is provided with H1 connection mouth, H2 connection mouth, B1 connection mouth, B2 connection mouth, H hydraulic fluid port and B hydraulic fluid port; Be communicated with described H hydraulic fluid port by the second one-way valve after being connected on the same paces parallel connection on described H1 connection mouth and described H2 respectively, be connected on H1 connection mouth respectively and be communicated with H hydraulic fluid port with second throttle after the first one-way valve parallel connection on H2; Described B1 connection mouth and described B2 connection mouth are communicated with described B hydraulic fluid port by series flow control valve, selector valve separately successively.
Described valve block is provided with T1 return opening, and B1 connection mouth and B2 connection mouth are communicated with this T1 return opening each via pressure-limit valve; Valve block is provided with T2 hydraulic fluid port for subsequent use, this T2 hydraulic fluid port for subsequent use with between B1 connection mouth and this T2 hydraulic fluid port for subsequent use be communicated with each via corresponding series flow control valve, selector valve with between B2 connection mouth; Be communicated with by the first modulating valve between H1 connection mouth with H2 connection mouth.
Compared with the prior art, the present invention is owing to have employed technique scheme, and in jacking process, first throttle valve can make two jacking cylinder rodless cavities keep pressure balance, thus ensures two jacking cylinder synchronous liftings; If when causing because of certain reason two jacking cylinders uneven, turn off corresponding selector valve by the short time and correct in time.Fall in tower process, series flow control valve can make jacking cylinder synchronous working, the adjustable jacking cylinder rate of descent of second throttle, and shutoff hand-operated direction valve can be rectified a deviation at any time in short-term, synchronous working when ensureing that jacking cylinder declines.
Accompanying drawing explanation
Fig. 1 is theory structure schematic diagram of the present invention.
In figure: the first modulating valve 1, first one-way valve 2, series flow control valve 3, pressure-limit valve 4, selector valve 5, second one-way valve 6, second throttle 7, with paces 8.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, the invention will be further described:
As shown in Figure 1: valve block has H hydraulic fluid port, B hydraulic fluid port, be respectively used to the H1 connection mouth that is connected with two jacking cylinder rodless cavities and H2 connection mouth and be respectively used to the B1 connection mouth that is connected with two jacking cylinder rod chambers and B2 connection mouth; Be connected on same paces 8 on H1 connection mouth be connected on H2 connection mouth another be communicated with H hydraulic fluid port by the second one-way valve 6 with after paces 8 parallel connection, the first one-way valve 2 be connected on H1 connection mouth is communicated with H hydraulic fluid port by second throttle 7 with after another the first one-way valve 2 parallel connection be connected on H2 connection mouth; B1 connection mouth is communicated with described B hydraulic fluid port by series flow control valve 3, selector valve 5 successively, and B2 connection mouth is communicated with B hydraulic fluid port by another series flow control valve 3, another selector valve 5 successively.
In order to avoid oil pressure is too high, described valve block is provided with T1 return opening; B1 connection mouth and B2 connection mouth are communicated with this T1 return opening each via pressure-limit valve 4.
In order to easy to use, valve block is provided with T2 hydraulic fluid port for subsequent use; This T2 hydraulic fluid port for subsequent use with between B1 connection mouth and this T2 hydraulic fluid port for subsequent use be communicated with each via corresponding series flow control valve 3, selector valve 5 with between B2 connection mouth.
In order to ensure the rodless cavity pressure balance of two jacking cylinders, be communicated with by the first modulating valve 1 between H1 connection mouth with H2 connection mouth.
Working principle: when the oil-feed of H mouth, pressure oil enters the rodless cavity of two jacking cylinders respectively through the first one-way valve 6, two synchronous valve 8, H1 connection mouth, H2 connection mouth, and the hydraulic oil of two jacking cylinder rod chambers then enters fuel tank 5 times by B1 connection mouth, B2 connection mouth through the series flow control valve 3 of correspondence, selector valve; Tower machine realizes jacking work.First throttle valve 1 can make two oil cylinder rodless cavities keep pressure balance; If when occurring that two jacking cylinders are uneven in jacking process, turn off corresponding selector valve 5 by the short time and correct.
When the oil-feed of B mouth, pressure oil enters the rod chamber of two jacking cylinders respectively through the selector valve 5 of correspondence, series flow control valve 3, and the hydraulic oil of two jacking cylinder rodless cavities enters fuel tank 7 times through the first one-way valve 2 of correspondence, second throttle.Two series flow control valves 2 can make two jacking cylinder synchronous workings, the rate of descent of the adjustable jacking cylinder of second throttle 7.Turn off selector valve 5 in short-term can rectify a deviation at any time, synchronous working when ensureing that jacking cylinder declines.
When system pressure is excessive, by pressure-limit valve 4 through the pressure release of T1 return opening.
Claims (2)
1. one kind and hydraulic power unit, jacking cylinder, fuel tank with the use of combined directional valve, its H1, H2 hydraulic fluid port connects the rodless cavity of two jacking cylinders respectively, B1, B2 mouth connects the rod chamber of two jacking cylinders, H, B mouth respectively with the H on hydraulic power unit, B mouth connects, its T1 and T2 mouth is that return opening connects fuel tank, it is characterized in that: described H mouth and H1, connected by two branch roads in parallel between H2 mouth, wherein one is second throttle (7) and two one-way valve (4) series connection in parallel, another is one-way valve (4) and two synchronous valve (5) in parallel, first throttle valve (6) is parallel with between H1 and H2 mouth, be connected by two branch roads in parallel between B mouth with B1, B2 mouth, every bar branch road is all by filler opening and series flow control valve (2) series connection of selector valve (1), the return opening of selector valve (1) is connected with T2 mouth, and the oil circuit between B1, B2 mouth with series flow control valve (2) is also communicated with T1 mouth each via pressure-limit valve (3).
2. combined directional valve according to claim 1, is characterized in that: described selector valve (1) is hand-operated direction valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410770477.8A CN104533868A (en) | 2014-12-15 | 2014-12-15 | Combined reversing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410770477.8A CN104533868A (en) | 2014-12-15 | 2014-12-15 | Combined reversing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104533868A true CN104533868A (en) | 2015-04-22 |
Family
ID=52849456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410770477.8A Pending CN104533868A (en) | 2014-12-15 | 2014-12-15 | Combined reversing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104533868A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105570218A (en) * | 2016-03-28 | 2016-05-11 | 苏州明志科技有限公司 | Synchronous hydraulic control loop of multiple groups of maneuvering rollers of core making machine |
| CN107933234A (en) * | 2017-12-04 | 2018-04-20 | 新疆沙漠虎特种车辆科技有限公司 | A kind of vehicle balance control system |
| CN108397445A (en) * | 2018-04-26 | 2018-08-14 | 蚌埠液力机械有限公司 | A kind of oil inlet oil return mechanism for hydraulic cylinder delivery test |
| CN112429643A (en) * | 2020-12-02 | 2021-03-02 | 徐州徐工液压件有限公司 | Large-tonnage tower crane jacking hydraulic system and control valve group thereof |
-
2014
- 2014-12-15 CN CN201410770477.8A patent/CN104533868A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105570218A (en) * | 2016-03-28 | 2016-05-11 | 苏州明志科技有限公司 | Synchronous hydraulic control loop of multiple groups of maneuvering rollers of core making machine |
| CN107933234A (en) * | 2017-12-04 | 2018-04-20 | 新疆沙漠虎特种车辆科技有限公司 | A kind of vehicle balance control system |
| CN108397445A (en) * | 2018-04-26 | 2018-08-14 | 蚌埠液力机械有限公司 | A kind of oil inlet oil return mechanism for hydraulic cylinder delivery test |
| CN112429643A (en) * | 2020-12-02 | 2021-03-02 | 徐州徐工液压件有限公司 | Large-tonnage tower crane jacking hydraulic system and control valve group thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150422 |
|
| WD01 | Invention patent application deemed withdrawn after publication |