CN201882875U - Hydraulic drive system of manned lifting table - Google Patents
Hydraulic drive system of manned lifting table Download PDFInfo
- Publication number
- CN201882875U CN201882875U CN2010205759133U CN201020575913U CN201882875U CN 201882875 U CN201882875 U CN 201882875U CN 2010205759133 U CN2010205759133 U CN 2010205759133U CN 201020575913 U CN201020575913 U CN 201020575913U CN 201882875 U CN201882875 U CN 201882875U
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- actuating unit
- valve
- power system
- fluid power
- lift platform
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Abstract
The utility mode relates to a hydraulic drive system of a manned lifting table, belonging to a hydraulic control system. The hydraulic drive system of the manned lifting table has the advantages of low cost, good synchronism and high safety, and is convenient to adjust. The hydraulic drive system of the manned lifting table comprises an oil tank, a hydraulic pump and two sets of actuating mechanisms, and two sets of the actuating mechanisms are respectively used for controlling lifting of two ends of the lifting table; the hydraulic drive system also comprises a thick-shunting adjusting device, two actuating mechanism reversing valves and an oil return valve bank, the output end of the hydraulic pump is connected with the input end of the thick-shunting adjusting device, the thick-shunting adjusting device comprises two output ends with equivalent flow rate, the output ends with the equivalent flow rate are respectively communicated with oil inlets of two actuating mechanism reversing valves, two working oil ports of each actuating mechanism reversing valve are communicated with two working oil ports of the actuating mechanism, and the return oil ports of the two actuating mechanism reversing valves are communicated with the oil tank by the oil return valve bank.
Description
Technical field
The utility model relates to a kind of hydraulic control system, particularly relates to a kind of manned lift flat-bed fluid power system that is used for.
Background technology
The scope that lifting table is used in construction machinery and equipment is comparatively extensive; for example; the Aerial Work LT that is used for lifting goods or elevator stage; be used to overhaul the hydraulic cylinder type bay-lift of vehicle or diesel engine; and be used for manned hydraulic winch lifting table etc., and above-mentioned these lifting tables overwhelming majority adopts fluid pressure drive device, and it is big that hydraulic-driven has a bearing capacity; be convenient to control, regulate, and be easy to advantage such as overload protection.But for the fluid pressure drive device of above-mentioned these lifting tables, the synchronism of its two even many actuating units is a problem that influences serviceability and safety performance all the time.At present, the way that solves above-mentioned synchronism problem mainly is divided into dual mode: a kind of is to adopt rigidity synchronization mechanism structure, two or many actuating units are linked together by rigid connector or Transmission, realize mechanical synchronization, yet because the unbalancedness of load and the stressed variation in the lifting process, the rigid connector or the Transmission stressed variation in the course of the work that keep synchronous are bigger, make rigid connector or Transmission fatigue impaired easily, and maintenance cost is higher; Another kind is to adopt the Hydraulic Synchronizing loop, comprising volumetric speed control synchronization loop, flow distributing and collecting synchronization loop, etc. flow distributor control synchronization loop, ratio, servocontrol synchronization loop etc., general all is to adopt the mode that adds synchronization loop behind change-over valve, though the serviceability of this mode is better, but hydraulic efficiency pressure system is complicated, cost cost and maintenance level are had relatively high expectations, particularly for the lower jacking equipment of some frequencies of utilization, unnecessary outfit is the hydraulic efficiency pressure system of costliness so.
In addition, when the modulated pressure platform descends, load moment is identical with the drive torque direction of actuating unit, load moment will encourage the motion of actuating unit, produce so-called negative value load moment, if the oil return line of hydraulic efficiency pressure system does not have pressure at this moment, it is that platform takes place to glide voluntarily that the load meeting should be conducted oneself with dignity, even may produce the hypervelocity motion, influence the safety of lifting table.
The utility model content
The manned lift platform fluid power system that the technical problems to be solved in the utility model provides that a kind of cost is low, synchronism good, be convenient to adjust, safety performance is high.
The utility model manned lift platform fluid power system, comprise fuel tank, Hydraulic Pump and two cover actuating units, described two cover actuating units are respectively applied for the landing at control lifting table two ends, wherein also comprise the rough segmentation flow modulation device, two actuating unit change-over valves and fuel-return valve group, described hydraulic pressure delivery side of pump is connected with the input end of rough segmentation flow modulation device, described rough segmentation flow modulation device comprises the mouth that two flows equate, the mouth that described two flows equate is connected with the oil inlet of two actuating unit change-over valves respectively, two actuator ports of described each actuating unit change-over valve are connected with two actuator ports of actuating unit, and the return opening of described two actuating unit change-over valves is connected with fuel tank by the fuel-return valve group.
The utility model manned lift platform fluid power system, wherein said fuel-return valve group comprises oil return change-over valve and sequence valve, the return opening of described two actuating unit change-over valves is connected with the input end of oil return change-over valve, a mouth of described oil return change-over valve directly is connected with fuel tank, and another mouth is connected with fuel tank by described sequence valve.
The utility model manned lift platform fluid power system is equipped with accurate adjustment stream device on the pipeline between wherein said actuating unit change-over valve and the actuating unit.
The utility model manned lift platform fluid power system, wherein said rough segmentation flow modulation device is shunting-combiner valve or gear synchronized splitter device, described accurate adjustment stream device is a governor valve.
The utility model manned lift platform fluid power system, wherein said actuating unit change-over valve is a three position four-way electromagnetic valve, described oil return change-over valve is the two-bit triplet electromagnetic valve.
The utility model manned lift platform fluid power system also is equipped with by pass valve between wherein said Hydraulic Pump and the rough segmentation flow modulation device.
The utility model manned lift platform fluid power system also is equipped with pressure measuring tie-in on the pipeline between wherein said actuating unit change-over valve and the actuating unit.
The utility model manned lift platform fluid power system, wherein said actuating unit is a hydraulic winch.
The utility model manned lift platform fluid power system, wherein said actuating unit is installed on the respective line by quick joint.
The utility model manned lift platform fluid power system difference from prior art is that the utility model manned lift platform fluid power system adopts two actuating unit change-over valves to control the mode of operation of two actuating units respectively, the rough segmentation flow modulation device was installed before the actuating unit change-over valve, when the synchronism problem takes place in actuating unit in operational process, can finely tune independently two actuating units by controlling two actuating unit change-over valves respectively, be used to guarantee the synchronism of actuating unit; Simultaneously the fuel-return valve group has been installed in the oil return line of hydraulic efficiency pressure system, in oil return line, has produced certain spill pressure and come balance negative value load moment, just can prevent that the downslide voluntarily of load and hypervelocity from gliding.
The fuel-return valve group of being made up of oil return change-over valve and sequence valve in the utility model manned lift platform fluid power system makes lifting table just can produce spill pressure in the decline process, and in the platform uphill process, do not produce spill pressure, make running efficiency of system higher; Make the oil pressure of output more stable by behind the actuating unit change-over valve, installing accurate adjustment stream device additional.
Below in conjunction with accompanying drawing manned lift platform fluid power system of the present utility model is described further.
Description of drawings
Fig. 1 is the structural representation of the utility model manned lift platform fluid power system;
Fig. 2 is the working state figure of the utility model manned lift platform fluid power system.
The specific embodiment
As shown in Figure 1, the utility model manned lift platform fluid power system comprises fuel tank 1, Hydraulic Pump 2, two cover actuating units 3,4, rough segmentation flow modulation device 6, two actuating unit change-over valves 7,8 and fuel-return valve groups 9.The mouth of Hydraulic Pump 2 is connected with the input end P of rough segmentation flow modulation device 6, between Hydraulic Pump 2 and the rough segmentation flow modulation device 6 by pass valve 13 is housed also.Rough segmentation flow modulation device 6 comprises mouth S1 and the S2 that two flows equate for shunting-combiner valve, mouth S1 and S2 are connected with the oil inlet P 1 and the P2 of two actuating unit change-over valves 7,8 respectively, actuating unit change-over valve 7,8 is a three position four-way electromagnetic valve, two actuator port A1, B1 and A2, the B2 of each actuating unit change-over valve 7,8 are connected with two actuator port A, B of actuating unit 3,4 respectively, actuating unit 3,4 is a hydraulic winch, and hydraulic winch is installed on the respective line by quick joint 15.The oil return inlet T 1 of two actuating unit change-over valves 7,8 and T2 are connected with fuel tank 1 by fuel-return valve group 9, fuel-return valve group 9 comprises oil return change-over valve 10 and sequence valve 11, the oil return inlet T 1 of two actuating unit change-over valves 7,8 and T2 are connected with the input end P3 of oil return change-over valve 10, oil return change-over valve 10 is two position four-way solenoid valves (using as the two-bit triplet electromagnetic valve), a mouth T3 of oil return change-over valve 10 directly is connected with fuel tank 1, and another mouth T4 is connected with fuel tank 1 by sequence valve 11.
More stable for the oil pressure that actuating unit 3,4 is obtained, governor valve can also be installed as accurate adjustment stream device 12 on pipeline between actuating unit change-over valve 7,8 and the actuating unit 3,4.On the pipeline between actuating unit change-over valve 7,8 and the actuating unit 3,4 pressure measuring tie-in 14 is housed also, is used for the pressure of signal piping.
As shown in Figure 2, be manned lift flat-bed structural representation in the stake machine, actuating unit 3,4 (being hydraulic winch) is installed in a side of mast 17, and steel rope 18 is fixedly connected on lifting table 5 two ends after walking around the pulley at mast 17 tops.Its working process is as follows: at first the primer fluid press pump 2, and by pass valve 13 gets electric, and hydraulic efficiency pressure system boosts to settling pressure; Control then the electromagnet 2DT of two actuating unit change-over valves 7,8 and 4DT simultaneously electric, two hydraulic winches spur lifting table 5 simultaneously and rise, after lifting table 5 arrived assigned addresses, electromagnet 2DT and 4DT be dead electricity simultaneously, platform stops; Then control electromagnet 1DT, the 3DT of two actuating unit change-over valves 7,8 and oil return change-over valve 10 and 5DT simultaneously, two hydraulic winches spur lifting table 5 simultaneously and descend, after lifting table 5 arrived assigned address, platform stopped, and finishes a working cycle.Run duration at lifting table 5, can allow arbitrary electromagnet 1DT, 2DT, 3DT or 4DT independent, dead electricity regulates the fine motion of hydraulic winch sync bit realizing, and needn't wait until that lifting table 5 regulates again when a high position or low level, greatly promoted the convenience of total system operation.
Above-described embodiment is described preferred implementation of the present utility model; be not that scope of the present utility model is limited; under the prerequisite that does not break away from the utility model design spirit; various distortion and improvement that those of ordinary skills make the technical solution of the utility model all should fall in the definite protection domain of the utility model claims.
Claims (9)
1. manned lift platform fluid power system, comprise fuel tank (1), Hydraulic Pump (2) and two cover actuating units (3,4), described two cover actuating units (3,4) be respectively applied for the landing of controlling lifting table (5) two ends, it is characterized in that: also comprise rough segmentation flow modulation device (6), two actuating unit change-over valves (7,8) and fuel-return valve group (9), the mouth of described Hydraulic Pump (2) is connected with the input end of rough segmentation flow modulation device (6), described rough segmentation flow modulation device (6) comprises the mouth that two flows equate, the mouth that described two flows equate respectively with two actuating unit change-over valves (7,8) oil inlet is connected, described each actuating unit change-over valve (7,8) two actuator ports and actuating unit (3,4) two actuator ports are connected, described two actuating unit change-over valves (7,8) return opening is connected with fuel tank (1) by fuel-return valve group (9).
2. manned lift platform fluid power system according to claim 1, it is characterized in that: described fuel-return valve group (9) comprises oil return change-over valve (10) and sequence valve (11), the return opening of described two actuating unit change-over valves (7,8) is connected with the input end of oil return change-over valve (10), a mouth of described oil return change-over valve (10) directly is connected with fuel tank (1), and another mouth is connected with fuel tank (1) by described sequence valve (11).
3. manned lift platform fluid power system according to claim 2 is characterized in that: accurate adjustment stream device (12) is housed on the pipeline between described actuating unit change-over valve (7,8) and the actuating unit (3,4).
4. manned lift platform fluid power system according to claim 3 is characterized in that: described rough segmentation flow modulation device (6) is shunting-combiner valve or gear synchronized splitter device, and described accurate adjustment stream device (12) is a governor valve.
5. manned lift platform fluid power system according to claim 4 is characterized in that: described actuating unit change-over valve (7,8) is a three position four-way electromagnetic valve, and described oil return change-over valve (10) is the two-bit triplet electromagnetic valve.
6. the manned lift platform fluid power system one of described according to claim 1 to 5 is characterized in that: between described Hydraulic Pump (2) and the rough segmentation flow modulation device (6) by pass valve (13) is housed also.
7. manned lift platform fluid power system according to claim 6 is characterized in that: on the pipeline between described actuating unit change-over valve (7,8) and the actuating unit (3,4) pressure measuring tie-in (14) is housed also.
8. manned lift platform fluid power system according to claim 7 is characterized in that: described actuating unit (3,4) is a hydraulic winch.
9. manned lift platform fluid power system according to claim 8 is characterized in that: described actuating unit (3,4) is installed on the respective line by quick joint (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205759133U CN201882875U (en) | 2010-10-25 | 2010-10-25 | Hydraulic drive system of manned lifting table |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205759133U CN201882875U (en) | 2010-10-25 | 2010-10-25 | Hydraulic drive system of manned lifting table |
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| Publication Number | Publication Date |
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| CN201882875U true CN201882875U (en) | 2011-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205759133U Expired - Fee Related CN201882875U (en) | 2010-10-25 | 2010-10-25 | Hydraulic drive system of manned lifting table |
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| CN (1) | CN201882875U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103171961A (en) * | 2013-03-21 | 2013-06-26 | 东南电梯股份有限公司 | Inclined drift personnel long-distance transportation system |
| CN105289928A (en) * | 2015-10-21 | 2016-02-03 | 承德市开发区富泉石油机械有限公司 | Grease injection hydraulic control device |
| WO2017071027A1 (en) * | 2015-10-27 | 2017-05-04 | 中国矿业大学 | Multi-cylinder synchronized, power-saving, high-efficiency hydraulic lifting/lowering system and method |
-
2010
- 2010-10-25 CN CN2010205759133U patent/CN201882875U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103171961A (en) * | 2013-03-21 | 2013-06-26 | 东南电梯股份有限公司 | Inclined drift personnel long-distance transportation system |
| CN105289928A (en) * | 2015-10-21 | 2016-02-03 | 承德市开发区富泉石油机械有限公司 | Grease injection hydraulic control device |
| CN105289928B (en) * | 2015-10-21 | 2018-06-12 | 承德市开发区富泉石油机械有限公司 | A kind of greasing hydraulic control unit |
| WO2017071027A1 (en) * | 2015-10-27 | 2017-05-04 | 中国矿业大学 | Multi-cylinder synchronized, power-saving, high-efficiency hydraulic lifting/lowering system and method |
| RU2657525C1 (en) * | 2015-10-27 | 2018-06-14 | Чайна Юниверсити Оф Майнинг Энд Текнолоджи | Multi-cylinder synchronous energy efficient high-performance hydraulic lifting system and method of its operation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110629 Termination date: 20151025 |
|
| EXPY | Termination of patent right or utility model |