CN200993130Y - Hydraulic central valve for jack synchronous lifting - Google Patents
Hydraulic central valve for jack synchronous lifting Download PDFInfo
- Publication number
- CN200993130Y CN200993130Y CN 200620162165 CN200620162165U CN200993130Y CN 200993130 Y CN200993130 Y CN 200993130Y CN 200620162165 CN200620162165 CN 200620162165 CN 200620162165 U CN200620162165 U CN 200620162165U CN 200993130 Y CN200993130 Y CN 200993130Y
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- valve
- hydraulic
- technology
- plug screw
- hydraulic pressure
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Abstract
The utility model discloses a hydraulic center valve for simultaneously elevating the lifter. The upper end of a center valve block (2) is connected with an electric motor (1), while the lower end is connected with an oil tank (3) through a gear pump (5); an overflow valve (17), a retaining valve (11) and an electromagnetic reserving valve (13) are arranged on the valve rod of the standard thread cartridge inserted valve, while an electromagnetic unloading valve (15), a small throttle plug screw (12) and a large throttle plug screw (16) are correspondingly arranged at the three sides of the valve block. The design concept of the utility model is that: discontinuous hydraulic technology is applied to replace the continuous hydraulic technology, which is suitable to the occasion that has a low synchronous control precision of hydraulic pressure (synchronous error is smaller than 2 percent). This technology can greatly reduce the cost of hydraulic system, simplify the design of electric control system and increase the service life of equipments. The promotion of this technology can lower the threshold of our applied technology of the hydraulic system.
Description
Technical field the utility model relates to a kind of special valve piece, and particularly a kind of synchronization lifting hydraulic pressure centre valve is a kind of high pressure float flux gear pump special valve piece of car lift.
Background technique is present, and both at home and abroad hydraulic synchronous system is divided into two big classes: a class be throttling controlling type (valve control), another kind of be volume controlling type (pump control).Wherein, the throttling controlling type is widely adopted flexibly with its compact structure and design debug, but, this control mode still only adopts continuous control hydraulic systems such as servovalve or Proportional valve, and domestic hydrovalve specialist manufacturers is still immature to the processing technique of this type of valve, can only rely on imported product, and their unit price is all more than 5000 yuan, so get off cover power unit units up to ten thousand at least.If their application technology is used the occasion of some precision not high (such as automobile maintenance industry etc.), just just like the sensation of " low load with strong power ", use many, automatically controlled complexity of element and expense higher, use the MANUFACTURER of this type of technology and can't obtain higher profit.
Above-mentioned situation has seriously restricted China's Hydraulic Synchronizing The Application of Technology and development.
Model utility content technical problem to be solved in the utility model is, a kind of elevator synchronous elevation hydraulic pressure centre valve is provided, in order to overcome the deficiency of above-mentioned existing procucts, the control valve of system becomes solenoid directional control valve by servovalve or Proportional valve, and system forms direct, reliable mechanical do-part by the switch control unit.
The technological scheme that its technical problem that solves the utility model adopts is as follows:
A kind of elevator synchronous elevation hydraulic pressure centre valve comprises the centre valve piece, screw-in cartridge valve, and motor, gear pump and fuel tank is characterized in that: the upper end of centre valve piece is connected with motor, and the lower end is connected with fuel tank by gear pump; Valve rod one relief valve, one-way valve, solenoid directional control valve and the unloading electromagnetic valve of standard thread cartridge valve, trifle stream plug screw and big throttling plug screw correspondence are fixed on three sides of valve piece.
The valve rod of standard thread cartridge valve also comprises the dynamic pressure recuperation valve.
The valve rod of standard thread cartridge valve also comprises the startup trimmer valve.
Good effect of the present utility model is: this elevator synchronous elevation design concept of hydraulic pressure centre valve: the Noncontinuous control hydraulics is replaced the continuous control hydraulics, the appearance of this technology can reduce the cost of hydraulic system significantly, simplify the design of automatical control system, the control valve of system becomes solenoid directional control valve by servovalve or Proportional valve, system forms direct, reliable mechanical do-part by the switch control unit, utilize " software servo " ability of control computer, make application system satisfy performance index, finish complicated mechanical control.This technology is applicable to the occasion of Hydraulic Synchronizing control accuracy not too high (synchronization error＜2%).The working life of raising equipment.The popularization of this technology will reduce the threshold of China's hydraulic system applications technology.
Description of drawings Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the A-A cutaway view Amplified image of Fig. 1.
Fig. 3 is a hydraulic schematic diagram of the present utility model.
What embodiment Fig. 1 showed is a hydraulic power unit of mobile heavy vehicle lifter.
As shown in Figure 1, 2, the upper end of this hydraulic pressure centre valve piece 2 is connected with motor 1, lower end and gear pump 5 and fuel tank 3 are fixing, and the valve rod correspondence of standard thread cartridge valve (relief valve 17, one-way valve 11, startup trimmer valve 4, dynamic pressure recuperation valve 10, solenoid directional control valve 13, unloading electromagnetic valve 15, trifle stream plug screw 12, big throttling plug screw 16) is fixed on three sides at valve piece center 2.
Solenoid directional control valve 13, solenoid directional control valve 15 are plugged in the F face of hydraulic pressure centre valve piece 2, and trifle stream plug screw 12, big throttling plug screw 16 correspondences are installed on their below; One-way valve 11, dynamic pressure recuperation valve 10 are plugged in the E face of hydraulic pressure centre valve piece 2; Relief valve 17 is installed on the G face of hydraulic pressure centre valve piece 2; Start the lower end that trimmer valve 4 is plugged in hydraulic pressure centre valve piece 2, in fuel tank.
As shown in Figure 3, uphill process: the motor 1 by deciding rotating speed and the gear pump 5 of fixed displacement provide high pressure flow setting type hydraulic oil to oil cylinder, and hydraulic oil is pumped to oil cylinder through filter 8 from fuel sucking pipe 6, realize the lifting action.The utility model adopts dynamic pressure recuperation valve 10, guarantees the synchronous of uphill process.If determine that four lift unit are a set of equipment, so, dispatch from the factory the delivery before with these four power units in rising flow minimum be benchmark, by setting up the speed-regulating handle 9 of dynamic pressure recuperation valve 10, other three power units are adjusted to this flow value, and the unnecessary flow of uphill process flows back to fuel tank by return opening B.
The concrete function of dynamic pressure recuperation valve 10 is: no matter how load changes, always the flow of C mouth remains on certain value (still being that load exists deviation no matter whether motor exists speed error, gear pump whether to have the difference of volumetric efficiency promptly), oil cylinder obtains constant flow rate, or hydraulic oil flows out from bypass B mouth; When speed-regulating handle 9 is set up spring force, in case there is a minimum pressure to fall.This valve will realize that the A mouth compensates to the C mouth pressure.
Decline process: by the switch of control solenoid directional control valve 13 and unloading electromagnetic valve 15 and each self-corresponding trifle stream plug screw 12 and big throttling plug screw 16, reflux by being realized by the gravity load of maintenance vehicle descending, in the decline reflux course, hydraulic oil flows back to fuel tank 3 from return tube 7.Adopt displacement detection system to follow the tracks of the displacement amount of each lift unit, and feed back to automatical control system and compare, send the break-make of SC sigmal control solenoid directional control valve 13 and unloading electromagnetic valve 15 by automatical control system, 1), solenoid directional control valve 13 thereby obtains the third gear rate of descent:, open trifle stream plug screw 12, obtain minimum and unload flow; 2), unloading electromagnetic valve 15 must be electric, opens big throttling plug screw 16, obtains the middle-grade flow that unloads; 3), solenoid directional control valve 13 and unloading electromagnetic valve 15 simultaneously electric, big or small throttling plug screw 16 and trifle stream plug screw 12 are opened simultaneously, obtain maximum and unload flow.
When ABAP Adapter has a power failure suddenly, and maintenance vehicle rotates emergency unloading handle 14 need descend the time, makes the commutation of solenoid valve 13 valve rods, the hydraulic oil flow oil sump tank, and maintenance vehicle is lowered by.
Claims (3)
1, a kind of elevator synchronous elevation hydraulic pressure centre valve, comprise centre valve piece (2), screw-in cartridge valve, motor (1), gear pump (5) and fuel tank (3) is characterized in that: the upper end of centre valve piece (2) is connected with motor (1), and the lower end is connected with fuel tank (3) by gear pump (5); Valve rod-the relief valve of standard thread cartridge valve (17), one-way valve (11), solenoid directional control valve (13) and unloading electromagnetic valve (15), trifle stream plug screw (12) and throttling plug screw (16) greatly) correspondence is fixed on three sides of valve piece.
2, elevator synchronous elevation as claimed in claim 1 hydraulic pressure centre valve is characterized in that: the valve rod of standard thread cartridge valve also comprises dynamic pressure recuperation valve (10).
3, elevator synchronous elevation as claimed in claim 1 or 2 hydraulic pressure centre valve is characterized in that: the valve rod of standard thread cartridge valve also comprises startup trimmer valve (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620162165 CN200993130Y (en) | 2006-12-14 | 2006-12-14 | Hydraulic central valve for jack synchronous lifting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620162165 CN200993130Y (en) | 2006-12-14 | 2006-12-14 | Hydraulic central valve for jack synchronous lifting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200993130Y true CN200993130Y (en) | 2007-12-19 |
Family
ID=38946206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620162165 Expired - Fee Related CN200993130Y (en) | 2006-12-14 | 2006-12-14 | Hydraulic central valve for jack synchronous lifting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200993130Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101968067A (en) * | 2010-10-24 | 2011-02-09 | 绍兴市肯特机械电子有限公司 | High precision pump control system |
| CN101749294B (en) * | 2008-12-02 | 2013-07-17 | 中南大学 | Hydraulic synchronous driving control system for realizing load balancing |
| CN111503073A (en) * | 2020-04-03 | 2020-08-07 | 山西大学 | Semi-closed hydraulic servo control system for mobile coal bunker equipment |
-
2006
- 2006-12-14 CN CN 200620162165 patent/CN200993130Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101749294B (en) * | 2008-12-02 | 2013-07-17 | 中南大学 | Hydraulic synchronous driving control system for realizing load balancing |
| CN101968067A (en) * | 2010-10-24 | 2011-02-09 | 绍兴市肯特机械电子有限公司 | High precision pump control system |
| CN111503073A (en) * | 2020-04-03 | 2020-08-07 | 山西大学 | Semi-closed hydraulic servo control system for mobile coal bunker equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071219 Termination date: 20100114 |