CN201129326Y - Novel hydraulic center valve for hoisting machine synchronous elevating - Google Patents
Novel hydraulic center valve for hoisting machine synchronous elevating Download PDFInfo
- Publication number
- CN201129326Y CN201129326Y CNU2007201585022U CN200720158502U CN201129326Y CN 201129326 Y CN201129326 Y CN 201129326Y CN U2007201585022 U CNU2007201585022 U CN U2007201585022U CN 200720158502 U CN200720158502 U CN 200720158502U CN 201129326 Y CN201129326 Y CN 201129326Y
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- valve
- hydraulic
- solenoid directional
- directional control
- control
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- Expired - Fee Related
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Abstract
The utility model discloses a hydraulic center valve for synchronously lifting of a lifter, valve rods of a standard threaded cartridge valve are in corresponding fixation at three lateral sides of a valve block, the standard threaded cartridge valve comprises an overflow valve (9), a one-way valve (11), a two-position three-way electromagnetic directional valve (10), a starting buffer valve (4), a first two-position two-way electromagnetic directional valve (13), a second two-position two-way electromagnetic directional valve (15), a small throttle screw plug (12) and a large throttle screw plug (16). The discontinuous control hydraulic technology replaces the continuous control hydraulic technology, which is applied to the occasion with relatively low hydraulic synchronous control precision. The problem that the original valve block is unstable in lifting control is completely solved, and the device can normally operate when using at a low temperature (-5-15 DEG C) area and when load and offset load is relatively severe, thereby largely increasing the application range of the device. The hydraulic center valve can largely reduce the cost of a hydraulic system, simplifies the design of an electric control system, and increases the service life of the device. The popularization of the hydraulic center valve will reduce the barrier of the applied technology of the hydraulic system in our country.
Description
Technical field
The utility model relates to a kind of new exclusive valve piece, and particularly a kind of novel elevator synchronous elevation hydraulic pressure centre valve is a kind of high pressure float flux gear pump special valve piece of car lift.Described lifting machine is a kind of automotive service equipement.
Background technique
Publication number is that the Chinese invention patent application " a kind of elevator synchronous elevation is with the hydraulic pressure centre valve and control and methods for using them " of CN1987126 discloses a elevator synchronous elevation hydraulic pressure centre valve, but this kind of valve piece only is provided with the electric-controlled hydraulic selector valve of two different restriction sizes in the equipment decline stage.Be the realization synchronization control at uphill process, when having adopted the dynamic pressure recuperation valve to control four posts to rise synchronously, but because an external dynamic pressure recuperation valve is 1300 yuan, this price is relatively more expensive for the domestic current product, is equivalent to the price of whole hydraulic power unit.Homemade hydraulic pressure dynamic pressure recuperation valve cheap though (130 yuan /), but find by test, this type of homemade recuperation valve sensitivity is relatively poor, especially in temperature low 15 ℃ the time and unbalance loading when big, working condition is very unstable, out of step conditions was difficult to adjust when four posts were risen, and finally caused overproof warning.
Model utility content technical problem to be solved in the utility model is, a kind of novel elevator synchronous elevation hydraulic pressure centre valve is provided, this novel hydraulic centre valve is to change the dynamic pressure recuperation valve into the two-bit triplet solenoid directional control valve on original basis, in order to overcome the deficiency of above-mentioned existing procucts.
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, the standard thread cartridge valve, and motor, gear pump and fuel tank, the upper end of centre valve piece is connected with motor, and the lower end is connected with fuel tank by gear pump; It is characterized in that: the valve rod correspondence of standard thread cartridge valve is fixed on three sides of valve piece, and described standard thread cartridge valve comprises relief valve, one-way valve, two-bit triplet solenoid directional control valve, startup trimmer valve, the first 2/2-way solenoid directional control valve and the second 2/2-way solenoid directional control valve, trifle stream plug screw and big throttling plug screw.
Good effect of the present utility model also 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, simplifies the design of automatical control system.This novel valve piece has thoroughly solved the former valve piece unsettled situation of control that rises, and uses in low temperature (5～15 ℃) area and the load unbalance loading also can proper functioning seriously the time when equipment, has improved the Applicable scope of equipment so greatly.System forms direct, reliable mechanical do-part by the switch control unit, utilizes " software servo " ability of control computer, makes application system satisfy performance index, finishes 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.
Embodiment
What Fig. 1,2 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 9, one-way valve 11, startup trimmer valve 4, two-bit triplet solenoid directional control valve 10, the first 2/2-way solenoid directional control valve 13 (with manual relief lever 14), the second 2/2-way solenoid directional control valve 15, trifle stream plug screw 12, big throttling plug screw 16 is fixed on three sides of E, F, G at valve piece center 2.
2/2-way solenoid directional control valve 13,2/2-way 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 9 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 two-bit triplet solenoid directional control valve 10, guarantees the synchronous of uphill process.If determine that four lift unit are a set of equipment, if rise very fast on the unit that wherein has, and other unit are slower, compare gather the run-length data of each unit by single-chip microcomputer after, sending instruction allows the two-bit triplet solenoid directional control valve on the very fast unit get electric commutation, the oil that makes this element oil pump supply with oil cylinder is cut off, and the change direction is an oil sump tank.When treating other unit stroke and its basically identical, send instruction again and allow this valve dead electricity, oil pump is to the oil cylinder fuel feeding.The flow that is equal to of realizing each oil cylinder by this mode rises synchronously.
The concrete function of two-bit triplet solenoid directional control valve 10 is: at ascent stage, no matter how load changes, always the flow of c mouth remain on certain value (promptly no matter motor whether exist speed error, gear pump whether exist the difference of volumetric efficiency still be temperature cross low reach load and have deviation), oil cylinder obtains constant flow rate, and unnecessary hydraulic oil flows out from bypass b mouth.When the electromagnet no electric circuit, a mouth and c mouth are logical, and be obstructed with the b mouth, oil pump oil supply oil supply cylinder; When electromagnet was switched on, a mouth and b mouth are logical, and be obstructed with the c mouth, and the oil that oil pump pumps is oil sump tank directly, the failure of oil feed oil supply cylinder.
Decline process: 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 switch that SC sigmal control is controlled the self-corresponding trifle stream of the first 2/2-way solenoid directional control valve 13 and the second 2/2-way solenoid directional control valve 15 and each plug screw 12 and big throttling plug screw 16 by automatical control system, reflux by being realized by the gravity load of maintenance vehicle descending synchronously.
Claims (1)
1, a kind of elevator synchronous elevation hydraulic pressure centre valve comprises centre valve piece (2), the standard thread cartridge valve, motor (1), gear pump (5) and fuel tank (3), 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); It is characterized in that: the valve rod correspondence of standard thread cartridge valve is fixed on three sides of valve piece, and described standard thread cartridge valve comprises relief valve (9), one-way valve (11), two-bit triplet solenoid directional control valve (10), startup trimmer valve (4), the first 2/2-way solenoid directional control valve (13) and the second 2/2-way solenoid directional control valve (15), trifle stream plug screw (12) and big throttling plug screw (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201585022U CN201129326Y (en) | 2007-12-06 | 2007-12-06 | Novel hydraulic center valve for hoisting machine synchronous elevating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201585022U CN201129326Y (en) | 2007-12-06 | 2007-12-06 | Novel hydraulic center valve for hoisting machine synchronous elevating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201129326Y true CN201129326Y (en) | 2008-10-08 |
Family
ID=40017168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201585022U Expired - Fee Related CN201129326Y (en) | 2007-12-06 | 2007-12-06 | Novel hydraulic center valve for hoisting machine synchronous elevating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201129326Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105275902A (en) * | 2015-11-25 | 2016-01-27 | 上海电气液压气动有限公司 | Supporting oil cylinder hydraulic system of oversized heavy equipment |
-
2007
- 2007-12-06 CN CNU2007201585022U patent/CN201129326Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105275902A (en) * | 2015-11-25 | 2016-01-27 | 上海电气液压气动有限公司 | Supporting oil cylinder hydraulic system of oversized heavy 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: 20081008 Termination date: 20100106 |