CN2040896U - Secondary lifting slide control valve - Google Patents
Secondary lifting slide control valve Download PDFInfo
- Publication number
- CN2040896U CN2040896U CN 88218646 CN88218646U CN2040896U CN 2040896 U CN2040896 U CN 2040896U CN 88218646 CN88218646 CN 88218646 CN 88218646 U CN88218646 U CN 88218646U CN 2040896 U CN2040896 U CN 2040896U
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- China
- Prior art keywords
- pressure
- energy storage
- valve
- control
- utility
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- 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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- Control And Safety Of Cranes (AREA)
Abstract
The utility model discloses a pressure memory system, comprising an accumulator and a unidirectional valve group. The accumulator is a memory element; the unidirectional valve used as a switch for maintaining and controlling pressure applies to the rising and lifting loop of the open type hydraulic of the hoisting machine, which can prevent loads from sliding instantly because of out of control in the process of the crane carrying loads and staying in the air for a short time. The utility model is suitable for hydraulic systems which need to keep first pressure.
Description
The utility model is about in the engineering hydraulic lift lifting mechanism, prevents the memory unit of secondary lifting and sliding.
All genus open type hydraulic system transmission cranes, the secondary lifting and sliding during its lifting mechanism hoisting heavy is one of its intrinsic disadvantage.It is for the safe reliability of hoisting crane, and the hydraulic efficiency pressure system of hoisting crane and element all have serious harm, therefore in the hoisting crane quality grading standard of China, it has been classified as one of important evidence of dividing the product design grade.For the countermeasure of this problem, domestic being in explored and the starting stage, also has only the minority Western European countries to adopt computer memory system or piezoelectricity travel switch to add the electromagnetic valve memory system abroad.Above-mentioned memory system more complicated, cost is higher, and domesticly now can not form a complete production network.
The purpose of this utility model is to provide a kind of simple, failure-free hydraulic pressure memory unit to crane.Working connection operation pressure when this device is directly remembered the first hoisting heavy of hoisting crane by an energy storage 2 in parallel with working connection, and hoist for the first time at hoisting crane and to cut off the control oil channel of drg when finishing, when hoisting crane once more during hoisting heavy, have only when working connection internal pressure during near 0.9 times of initial value, this memory unit just can be connected the control oil channel of drg automatically, open drg, the present invention adds the electromagnetic valve memory system with the computer memory system with the piezoelectricity travel switch and compares.Have simple in structure, response is fast, dependable performance and low cost and other advantages.
Solution of the present utility model is: adorn an energy storage 2 on the control oil channel of former connection working connection and drg, and respectively put a hydraulic control one-way valve in the import and export of energy storage 2.When hoisting circuit hoisting heavy first, working connection internal pressure oil enters energy storage 2 through the import check valve, and hoisting stops.The working connection pressure release, the former pressure oil that enters energy storage 2 is pinned and is remained in the energy storage 2 by the check valve on energy storage 2 both sides, simultaneously the drg control oil channel is cut off, when hoisting crane once more at the beginning of the hoisting heavy, the working connection internal pressure is lower than the force value of memory in the energy storage 2, the drg control oil channel continues to be cut off, have only when the working connection internal pressure near energy storage 2 in during the memory pressure value, just can open the hydraulic control one-way valve on energy storage (2) outlet limit with the control oil channel that the hoisting circuit working connection links, thereby connect control oil channel between working connection and the drg, open drg.
Below in conjunction with accompanying drawing the utility model is described
Accompanying drawing 1 is a lifting loop schematic diagram of the present utility model;
Accompanying drawing 2 is the hoisting system schematic diagram after pressure release control cock in the utility model 4,5 is removed;
Accompanying drawing 3 changes the hoisting system schematic diagram that is sent the pressure release of signal control the utility model by the limiter of moment of hoisting crane self for after pressure release control cock in the utility model 4,5 is removed.
The utility model is kept and master cock by memory cell, pressure, and the pressure release control element is formed.Wherein memory cell is made of energy storage 2, and pressure keeps and master cock is made of valve group 1,3, and the pressure release control elements is made of valve group 4,5.
See Fig. 1, concise and to the point principle of work of the present utility model and process are as follows:
1. sky hooks liter: no pressure in the energy storage 2; The hydraulic control one-way valve of valve group 3 is opened prior to valve group 1 internal check valve, and (make the control plunger of valve group 3 hydraulic control one-way valves more bigger than the active area of nonreturn valve core) this moment, the control oil channel of working connection → drg was in unobstructed state, and hook can be normally played in the loop.
2. hoisting heavy for the first time, treating that sky hooks rises and is loaded on gradually weight is sling, this moment, energy storage 2 was in state in parallel with working connection, the operation pressure oil of working connection must enter energy storage 2, stop when hoisting for the first time, weight at first is balanced the block of valve aloft, the following partly pressure release of working connection balance cock, and the pressure oil that stores in the energy storage 2 pins valve group 1,3 rapidly and keeps former force value.The oil return of drg is then flowed back to working connection through the check valve of valve group 3.
3. hoisting heavy for the second time: when hoisting crane need be be hung in aerial load for the first time and promote once more the time, as long as oil pressure does not reach 0.9 times of initial value in the working connection, the control oil channel between working connection → drg is cut off by valve group 1,3, and drg 2 is in closed condition; Have only the interior oil pressure of the working connection of working as to reach 0.9 times of initial value, just can open the hydraulic control one-way valve of valve group 3, make releasing of brake, the loop enters work.
4. transfer and pressure release: when weight is transferred, native system is cut by the rib valve, the control oil channel of drg is in unobstructed state, the normal operation in loop and native system are irrelevant, a lifting process finishes, being as the criterion is equipped with next working process, and native system should return to its initial condition, and promptly energy storage need release original memory pressure.The pressure release of native system is after hoisting crane puts down weight, finishes in the process of disengagement suspender.When the load of hoisting crane is in place loosen after, for throwing off suspender, also must continue a bit of height that descends by empty hook, in this a bit of hollow hook lowering process, to be exported to the oil pressure between the balance cock be the hook force value to HM Hydraulic Motor in the working connection, has only when system to enter this operating mode, hydraulic control one-way valve 5 just can be opened, the hydraulic control one-way valve 4 that continues is also opened, and is opened the hydraulic control one-way valve of valve group 1 again by the control presssure oil of balance cock, makes the energy storage pressure release.
See Fig. 2, the utility model is as its pressure release control cock 4,5 is released, and only by energy storage 2, in line check valve 1 and fuel-displaced check valve 3 are formed, but this memory-controlled valve normal operation still.Different is: at the beginning of playing hook next time, intrasystem instantaneous pressure value must reach 90% of former memory value, as long as drg one is opened, former memory disappears immediately and is consistent with outer year required pressure.The utility model enters next normal operation circulation again.
See Fig. 3, the utility model is as removing its pressure release control cock 4,5, add electromagnetic valve 6, by energy storage 2, pass in and out oily check valve 1,3 and electromagnetic valve 6 compositions altogether, its pressure release is by artificial given pressure release point and input torque killer, as long as system condition enters this point, limiter of moment promptly sends electric signal and gives electromagnetic valve 6, and electromagnetic valve 6 is opened, the energy storage pressure release.
Principal character of the present utility model is: be the pressure memory cell by accumulator, as keeping the whether switch of conducting of memory and control system, formed all-hydraulic memory storage by them with the hydraulic control one-way valve group. Pressure release of the present invention is controlled and is finished by the inlet outlet pressure differential of hydraulic motor.
Claims (3)
1, secondary lifting and sliding control cock.It is characterized in that it is made up of memory cell, pressure maintenance and master cock, pressure release control element.Wherein memory cell is made of energy storage 2 that pressure keeps and master cock is made of valve group 1,3.The pressure release control element is made of valve group 4,5.
2,, it is characterized in that it also can only be made up of energy storage 2 and pressure retentive control valve 1,3 according to the described secondary lifting and sliding control cock of claim 1.
3,, it is characterized in that it also can be made up of energy storage 2, valve group 1,3 and electromagnetic valve 6 altogether electromagnetic valve 6 according to the described secondary lifting and sliding control cock of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88218646 CN2040896U (en) | 1988-11-30 | 1988-11-30 | Secondary lifting slide control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88218646 CN2040896U (en) | 1988-11-30 | 1988-11-30 | Secondary lifting slide control valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2040896U true CN2040896U (en) | 1989-07-12 |
Family
ID=4851066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88218646 Withdrawn CN2040896U (en) | 1988-11-30 | 1988-11-30 | Secondary lifting slide control valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2040896U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011120393A1 (en) * | 2010-04-01 | 2011-10-06 | 长沙中联重工科技发展股份有限公司 | System and method for preventing sliding during secondary lifting of crane |
| CN102491216A (en) * | 2011-12-14 | 2012-06-13 | 徐州重型机械有限公司 | Brake control valve unit and hosting hydraulic control system and crane having same |
| CN102502443A (en) * | 2011-10-11 | 2012-06-20 | 中联重科股份有限公司 | Control method and control device for secondary hoisting of crane winch |
-
1988
- 1988-11-30 CN CN 88218646 patent/CN2040896U/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011120393A1 (en) * | 2010-04-01 | 2011-10-06 | 长沙中联重工科技发展股份有限公司 | System and method for preventing sliding during secondary lifting of crane |
| CN102502443A (en) * | 2011-10-11 | 2012-06-20 | 中联重科股份有限公司 | Control method and control device for secondary hoisting of crane winch |
| CN102502443B (en) * | 2011-10-11 | 2014-12-24 | 中联重科股份有限公司 | Control method and control device for secondary hoisting of crane winch |
| CN102491216A (en) * | 2011-12-14 | 2012-06-13 | 徐州重型机械有限公司 | Brake control valve unit and hosting hydraulic control system and crane having same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |