CN102951557A - Hydraulic system used for elevating mechanism - Google Patents
Hydraulic system used for elevating mechanism Download PDFInfo
- Publication number
- CN102951557A CN102951557A CN2011102404792A CN201110240479A CN102951557A CN 102951557 A CN102951557 A CN 102951557A CN 2011102404792 A CN2011102404792 A CN 2011102404792A CN 201110240479 A CN201110240479 A CN 201110240479A CN 102951557 A CN102951557 A CN 102951557A
- Authority
- CN
- China
- Prior art keywords
- valve
- bit
- hydraulicchange
- hydraulic
- epitrochoidal chamber
- Prior art date
- 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.)
- Granted
Links
Images
Abstract
The invention discloses a hydraulic system used for an elevating mechanism. The hydraulic system comprises an oil tank (1), a hydraulic pump (3), an elevating valve (5) and a hydraulic cylinder (6), the elevating valve has an elevating place and a falling place, the elevating valve enables oil in the oil tank to flow into the work chamber (13) of the hydraulic cylinder through the hydraulic pump when the elevating valve is in the elevating place, and the elevating valve enables the oil in the work chamber of the hydraulic cylinder to return to the oil tank when the elevating valve is in the falling place, wherein a safe valve (7) is connected between the elevating valve and the work chamber of the hydraulic cylinder, a backpressure valve (8) is connected between the oil tank and the safe valve, the safe valve prevents the flow-out of the oil in the work chamber or enables the oil in the work chamber to slowly flow out when the oil pressure at the inlet of the safe valve is zero, and the safe valve enables an oil way between the elevating valve and the work chamber to be smooth when the oil pressure at the inlet of the safe valve is not zero. The above technical scheme can avoid the damages of the hydraulic system, so the equipment damages and casualties are avoided, thereby the safe running of the elevating mechanism is guaranteed.
Description
Technical field
The present invention relates to a kind of hydraulic efficiency pressure system for lifting mechanism.
Background technology
As shown in Figure 1, the hydraulic efficiency pressure system that is used at present the lifting mechanism of dumping truck generally includes fuel tank 1, oil filter 2, Hydraulic Pump 3, lift valve 5 and hydraulic actuating cylinder 6, in addition, also be connected with by pass valve 4 between the outlet of described Hydraulic Pump 3 and the described fuel tank 1, described lift valve 5 has the lifting position and the position that descends, in described lifting position, described lift valve 5 flows in the rodless cavity of described hydraulic actuating cylinder 6 fluid in the described fuel tank 1 by Hydraulic Pump 3, in described decline position, described lift valve 5 flows back in the described fuel tank 1 fluid in the rodless cavity of described hydraulic actuating cylinder 6.As shown in Figure 1, when lift valve 5 was in the lifting position, Hydraulic Pump 3 entered the oil pump in the fuel tank 1 in the lift valve 5, and fluid flows in the rodless cavity of hydraulic actuating cylinder 6 by lift valve 5, thereby realized the lifting of the piston rod of hydraulic actuating cylinder 6; When lift valve 5 was in the decline position, the fluid in the rodless cavity of hydraulic actuating cylinder 6 flowed back in the fuel tank 1, thereby realized the decline of the piston rod of hydraulic actuating cylinder 6.When the rodless cavity of hydraulic actuating cylinder 6 and the oil pipe between the fuel tank 1 because during the former thereby unexpected explosion such as aging, fluid in the rodless cavity of hydraulic actuating cylinder 6 can flow out rapidly, piston rod in the hydraulic actuating cylinder 6 can fall after rise rapidly owing to losing support, thereby cause hydraulic efficiency pressure system to be damaged, even may cause overturning and personal casualty, thereby bring very large loss for life and property.
Summary of the invention
The purpose of this invention is to provide a kind of hydraulic efficiency pressure system that is used for lifting mechanism with higher safety performance.
To achieve these goals, the invention provides a kind of hydraulic efficiency pressure system for lifting mechanism, this hydraulic efficiency pressure system comprises fuel tank, Hydraulic Pump, lift valve and hydraulic actuating cylinder, described lift valve has the lifting position and the position that descends, in described lifting position, described lift valve flows in the epitrochoidal chamber of described hydraulic actuating cylinder the fluid in the described fuel tank by described Hydraulic Pump, in described decline position, described lift valve flows back in the described fuel tank fluid in the epitrochoidal chamber of described hydraulic actuating cylinder, wherein, also be connected with safety valve between the epitrochoidal chamber of described lift valve and described hydraulic actuating cylinder, be connected with back pressure valve between described fuel tank and the described safety valve, when the oil pressure of the entrance of described safety valve is 0, described safety valve stops the fluid in the described epitrochoidal chamber to flow out or the fluid in the described epitrochoidal chamber is slowly flowed out, when the oil pressure of the entrance of described safety valve was not 0, described safety valve was with the oil circuit conducting between described lift valve and the described epitrochoidal chamber.
Preferably, described safety valve is near described hydraulic actuating cylinder setting.
Preferably, described safety valve comprises bi-bit bi-pass spring hydraulicchange-over valve, when the inlet pressure sum of spring pressure and described bi-bit bi-pass spring hydraulicchange-over valve during greater than the delivery pressure of described bi-bit bi-pass spring hydraulicchange-over valve, described bi-bit bi-pass spring hydraulicchange-over valve is with the oil circuit conducting between described lift valve and the described epitrochoidal chamber, and when the inlet pressure sum of spring pressure and described bi-bit bi-pass spring hydraulicchange-over valve during less than the delivery pressure of described bi-bit bi-pass spring hydraulicchange-over valve, described safety valve stops the fluid in the described epitrochoidal chamber to flow out or the fluid in the described epitrochoidal chamber is slowly flowed out.
Preferably, be integrated with check valve in the described bi-bit bi-pass spring hydraulicchange-over valve, when the oil pressure of the entrance of described bi-bit bi-pass spring hydraulicchange-over valve was 0, described check valve stoped the fluid in the epitrochoidal chamber of described hydraulic actuating cylinder to flow out.
Preferably, be integrated with the first throttle valve in the described bi-bit bi-pass spring hydraulicchange-over valve, when the oil pressure of the entrance of described bi-bit bi-pass spring hydraulicchange-over valve was 0, described first throttle valve slowly flowed out the fluid in the epitrochoidal chamber of described hydraulic actuating cylinder.
Preferably, described safety valve also comprises the second flow regulating valve, and this second flow regulating valve is connected between the epitrochoidal chamber of described bi-bit bi-pass spring change-over valve and described hydraulic actuating cylinder.
Preferably, described back pressure valve is flow regulating valve.
Preferably, described back pressure valve is arranged between the return opening of described fuel tank and described lift valve.
Preferably, described lift valve has middle stop bit, stop bit in this, and described fuel tank and described hydraulic actuating cylinder are not connected.
Preferably, be connected with by pass valve between described hydraulic pressure delivery side of pump and the described fuel tank.
The working process of above-mentioned hydraulic efficiency pressure system for lifting mechanism is as follows: when the oil pipe between fuel tank and the safety valve explosion does not occur, that is to say when the oil pressure of the entrance of described safety valve is not 0, safety valve is the oil circuit conducting between described lift valve and the described epitrochoidal chamber, thereby guaranteed the normal operation of hydraulic efficiency pressure system; When the oil pipe between fuel tank and the safety valve because during the former thereby unexpected explosion such as aging, the oil pressure of the entrance of safety valve is 0, thereby stop the fluid outflow in the epitrochoidal chamber or the fluid in the epitrochoidal chamber is slowly flowed out by safety valve, thereby can make the working portion of hydraulic actuating cylinder keep motionless or slow falling, avoid hydraulic efficiency pressure system to damage, and then avoid device damage and personal casualty, guaranteed the safe operation of lifting mechanism.
Other features and advantages of the present invention will partly be described in detail in the specific embodiment subsequently.
Description of drawings
Accompanying drawing is to be used to provide a further understanding of the present invention, and consists of the part of specification sheets, is used from explanation the present invention with the following specific embodiment one, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the structural representation that has the hydraulic efficiency pressure system of the lifting mechanism that is used for dumping truck now;
Fig. 2 is the structural representation of a kind of embodiment of the hydraulic efficiency pressure system for lifting mechanism provided by the invention;
Fig. 3 is the structural representation of the another kind of embodiment of the hydraulic efficiency pressure system for lifting mechanism provided by the invention;
Fig. 4 is the structural representation of the first embodiment of the safety valve of the hydraulic efficiency pressure system for lifting mechanism provided by the invention;
Fig. 5 is the structural representation of the second embodiment of the safety valve of the hydraulic efficiency pressure system for lifting mechanism provided by the invention;
Fig. 6 is the structural representation of the third embodiment of the safety valve of the hydraulic efficiency pressure system for lifting mechanism provided by the invention;
Fig. 7 is the structural representation of the 4th kind of embodiment of the safety valve of the hydraulic efficiency pressure system for lifting mechanism provided by the invention.
Description of reference numerals
1: fuel tank; 2: oil filter; 3: Hydraulic Pump; 4: by pass valve; 5: lift valve; 6: hydraulic actuating cylinder; 7: safety valve; 8: back pressure valve; 9: the second flow regulating valve; 10: the first throttle valve; 11: check valve; 12: bi-bit bi-pass spring hydraulicchange-over valve; 13: epitrochoidal chamber; 14: working portion.
The specific embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated.Should be understood that, the specific embodiment described herein only is used for description and interpretation the present invention, is not limited to the present invention.
Before the present invention is described in detail, it is to be noted, employed term among the present invention " entrance of safety valve " refers in particular to the hydraulic fluid port that is connected with lift valve of safety valve, " entrance of bi-bit bi-pass spring hydraulicchange-over valve " refers in particular to the hydraulic fluid port that is connected with lift valve of bi-bit bi-pass spring hydraulicchange-over valve, and " outlet of bi-bit bi-pass spring hydraulicchange-over valve " refers in particular to the hydraulic fluid port that is connected with hydraulic actuating cylinder of bi-bit bi-pass spring hydraulicchange-over valve.
The below describes the hydraulic efficiency pressure system that is used for lifting mechanism take dumping truck as example.
As shown in Figures 2 and 3, the hydraulic efficiency pressure system that is used for lifting mechanism that the specific embodiment of the invention provides comprises fuel tank 1, Hydraulic Pump 3, lift valve 5 and hydraulic actuating cylinder 6, described lift valve 5 has the lifting position and the position that descends, in described lifting position, described lift valve 5 flows in the epitrochoidal chamber 13 of described hydraulic actuating cylinder 6 fluid in the described fuel tank 1 by described Hydraulic Pump 3, in described decline position, described lift valve 5 flows back in the described fuel tank 1 fluid in the epitrochoidal chamber 13 of described hydraulic actuating cylinder 6, wherein, also be connected with safety valve 7 between the epitrochoidal chamber 13 of described lift valve 5 and described hydraulic actuating cylinder 6, be connected with back pressure valve 8 between described fuel tank 1 and the described safety valve 7, when the oil pressure of the entrance of described safety valve 7 is 0, described safety valve 7 stops the fluid in the described epitrochoidal chamber 13 to flow out or the fluid in the described epitrochoidal chamber 13 is slowly flowed out, when the oil pressure of the entrance of described safety valve 7 was not 0, described safety valve 7 was with the oil circuit conducting between described lift valve 5 and the described epitrochoidal chamber 13.
The working process of above-mentioned hydraulic efficiency pressure system for lifting mechanism is as follows: when the oil pipe between fuel tank 1 and the safety valve 7 explosion does not occur, that is to say when the oil pressure of the entrance of described safety valve 7 is not 0, safety valve 7 is the oil circuit conducting between described lift valve 5 and the described epitrochoidal chamber 13, thereby guaranteed the normal operation of hydraulic efficiency pressure system; When the oil pipe between fuel tank 1 and the safety valve 7 because during the former thereby unexpected explosion such as aging, the oil pressure of the entrance of safety valve 7 is 0, thereby stop the fluid outflow in the epitrochoidal chamber 13 or the fluid in the epitrochoidal chamber 13 is slowly flowed out by safety valve 7, thereby can make the working portion 14 of hydraulic actuating cylinder 6 keep motionless or slow falling, avoid hydraulic efficiency pressure system to damage, and then avoid device damage and personal casualty, guaranteed the safe operation of lifting mechanism.
Preferably, described safety valve 7 arranges near described hydraulic actuating cylinder 6, thereby hydraulic efficiency pressure system is better protected.Preferably, oil pipe between safety valve 7 and the hydraulic actuating cylinder 6 adopts the oil pipe of comparatively robust, steel pipe for example, thus so that the oil pipe between safety valve 7 and the hydraulic actuating cylinder 6 is not easy damage.
Can stop the fluid outflow in the described epitrochoidal chamber 13 or the fluid in the described epitrochoidal chamber 13 is slowly flowed out by various suitable modes.
As shown in Figure 2, according to one embodiment of the present invention, be integrated with check valve 11 in the described bi-bit bi-pass spring hydraulicchange-over valve 12, when the oil pressure of the entrance of described bi-bit bi-pass spring hydraulicchange-over valve 12 is 0, fluid in the epitrochoidal chamber 13 of the described hydraulic actuating cylinder 6 of described check valve 11 preventions flows out, thereby can make the working portion 14 of hydraulic actuating cylinder 6 keep motionless.
As shown in Figure 3, according to another embodiment of the invention, be integrated with first throttle valve 10 in the described bi-bit bi-pass spring hydraulicchange-over valve 12, when the oil pressure of the entrance of described bi-bit bi-pass spring hydraulicchange-over valve 12 is 0, described first throttle valve 10 slowly flows out the fluid in the epitrochoidal chamber 13 of described hydraulic actuating cylinder 6, thereby the working portion 14 of hydraulic actuating cylinder 6 is slowly fallen after rise.
For the rising or falling speed of convenient control lifting mechanism, preferably, described safety valve 7 also comprises the second flow regulating valve 9, and this second flow regulating valve 9 is connected between the epitrochoidal chamber 13 of described bi-bit bi-pass spring change-over valve 12 and described hydraulic actuating cylinder 6.
Fig. 4 to Fig. 7 has shown four kinds of embodiments of the safety valve of the hydraulic efficiency pressure system that is used for lifting mechanism.In embodiment shown in Figure 4, safety valve 7 comprises bi-bit bi-pass spring hydraulicchange-over valve 12 and the second flow regulating valve 9, is integrated with check valve 11 in the bi-bit bi-pass spring hydraulicchange-over valve 12; In embodiment shown in Figure 5, safety valve 7 comprises bi-bit bi-pass spring hydraulicchange-over valve 12 and the second flow regulating valve 9, is integrated with first throttle valve 10 in the bi-bit bi-pass spring hydraulicchange-over valve 12; In embodiment shown in Figure 6, safety valve 7 only comprises bi-bit bi-pass spring hydraulicchange-over valve 12, is integrated with check valve 11 in the bi-bit bi-pass spring hydraulicchange-over valve 12; In embodiment shown in Figure 7, safety valve 7 only comprises bi-bit bi-pass spring hydraulicchange-over valve 12, is integrated with first throttle valve 10 in the bi-bit bi-pass spring hydraulicchange-over valve 12.
Described lift valve 5 can be taked various suitable forms.For example, lift valve 5 can also have middle stop bit except having lifting position and decline position, stop bit in this, and described fuel tank 1 and described hydraulic actuating cylinder 6 are not connected, thereby can easily lifting mechanism be locked in any position.
In order to filter easily the impurity of fluid in the fuel tank 1, preferably, be connected with oil filter 2 between described fuel tank 1 and the described Hydraulic Pump 3.
In order to control easily the pressure of lift valve 5 entrance, so that lifting lifting mechanism reposefully preferably, is connected with by pass valve 4 between the outlet of described Hydraulic Pump 3 and the described fuel tank 1.
Described epitrochoidal chamber 13 can be the rod chamber of hydraulic actuating cylinder 6, also can be the rodless cavity of hydraulic actuating cylinder 6, selects according to concrete needs.When epitrochoidal chamber 13 was the rodless cavity of hydraulic actuating cylinder 6, piston rod was the working portion 14 of hydraulic actuating cylinder 6, was responsible for lifting mechanism being risen or falling.
The working process of the hydraulic efficiency pressure system that is used for lifting mechanism that the specific embodiment of the invention provides is described below in conjunction with accompanying drawing.
As shown in Figures 2 and 3, when lift valve 5 is in the lifting position, Hydraulic Pump 3 enters the oil pump in the fuel tank 1 in the lift valve 5, bi-bit bi-pass spring hydraulicchange-over valve 12 is opened straight-through oil circuit under the double action of oil pressure and spring pressure, fluid flows in the epitrochoidal chamber 13 of hydraulic actuating cylinder 6, thereby realizes the lifting of the working portion 14 of hydraulic actuating cylinder 6; When lift valve 5 is in the decline position, back pressure valve 8 produces back pressure in the entrance of bi-bit bi-pass spring hydraulicchange-over valve 12, bi-bit bi-pass spring hydraulicchange-over valve 12 is opened straight-through oil circuit under the double action of the back pressure of back pressure valve 8 and spring pressure, fluid in the epitrochoidal chamber 13 of hydraulic actuating cylinder 6 flows back in the fuel tank 1 by safety valve 7 and lift valve 5, thereby realizes the decline of the working portion 14 of hydraulic actuating cylinder 6; No matter lift valve 5 is in the position that still descends, lifting position, when the oil pipe generation explosion between fuel tank 1 and the bi-bit bi-pass spring hydraulicchange-over valve 12, the pressure of the entrance of bi-bit bi-pass spring hydraulicchange-over valve 12 is 0, and the pressure in bi-bit bi-pass spring hydraulicchange-over valve 12 exits is larger, this pressure overcomes the spring force of bi-bit bi-pass spring hydraulicchange-over valve 12, thereby so that bi-bit bi-pass spring hydraulicchange-over valve 12 is in check valve 11 states or first throttle valve 10 states, stop the fluid outflow in the described epitrochoidal chamber 13 or the fluid in the described epitrochoidal chamber 13 is slowly flowed out, thereby can make the working portion 14 of hydraulic actuating cylinder 6 keep motionless or slow falling, avoid hydraulic efficiency pressure system to damage, and then avoid device damage and personal casualty, guaranteed the safe operation of lifting mechanism.
The lifting mechanism that can be widely used in various engineering trucks for the hydraulic efficiency pressure system of lifting mechanism provided by the invention, for example lifting mechanism of dumping truck.
Below describe by reference to the accompanying drawings preferred implementation of the present invention in detail; but; the present invention is not limited to the detail in the above-mentioned embodiment; in technical conceive scope of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
Need to prove that in addition each the concrete technical characterictic described in the above-mentioned specific embodiment in reconcilable situation, can make up by any suitable mode.For fear of unnecessary repetition, the present invention is to the no longer separately explanation of various possible array modes.
In addition, also can carry out combination in any between the various embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (10)
1. hydraulic efficiency pressure system that is used for lifting mechanism, this hydraulic efficiency pressure system comprises fuel tank (1), Hydraulic Pump (3), lift valve (5) and hydraulic actuating cylinder (6), described lift valve (5) has the lifting position and the position that descends, in described lifting position, described lift valve (5) flows in the epitrochoidal chamber (13) of described hydraulic actuating cylinder (6) fluid in the described fuel tank (1) by described Hydraulic Pump (3), in described decline position, described lift valve (5) flows back in the described fuel tank (1) fluid in the epitrochoidal chamber (13) of described hydraulic actuating cylinder (6), it is characterized in that, also be connected with safety valve (7) between the epitrochoidal chamber (13) of described lift valve (5) and described hydraulic actuating cylinder (6), be connected with back pressure valve (8) between described fuel tank (1) and the described safety valve (7), when the oil pressure of the entrance of described safety valve (7) is 0, described safety valve (7) stops the fluid in the described epitrochoidal chamber (13) to flow out or the fluid in the described epitrochoidal chamber (13) is slowly flowed out, when the oil pressure of the entrance of described safety valve (7) was not 0, described safety valve (7) was with the oil circuit conducting between described lift valve (5) and the described epitrochoidal chamber (13).
2. the hydraulic efficiency pressure system for lifting mechanism according to claim 1, wherein, described safety valve (7) arranges near described hydraulic actuating cylinder (6).
3. the hydraulic efficiency pressure system for lifting mechanism according to claim 1, wherein, described safety valve (7) comprises bi-bit bi-pass spring hydraulicchange-over valve (12), when the inlet pressure sum of spring pressure and described bi-bit bi-pass spring hydraulicchange-over valve (12) during greater than the delivery pressure of described bi-bit bi-pass spring hydraulicchange-over valve (12), described bi-bit bi-pass spring hydraulicchange-over valve (12) is with the oil circuit conducting between described lift valve (5) and the described epitrochoidal chamber (13), and when the inlet pressure sum of spring pressure and described bi-bit bi-pass spring hydraulicchange-over valve (12) during less than the delivery pressure of described bi-bit bi-pass spring hydraulicchange-over valve (12), described safety valve (7) stops the fluid in the described epitrochoidal chamber (13) to flow out or the fluid in the described epitrochoidal chamber (13) is slowly flowed out.
4. the hydraulic efficiency pressure system for lifting mechanism according to claim 3, wherein, be integrated with check valve (11) in the described bi-bit bi-pass spring hydraulicchange-over valve (12), when the oil pressure of the entrance of described bi-bit bi-pass spring hydraulicchange-over valve (12) was 0, described check valve (11) stoped the fluid in the epitrochoidal chamber (13) of described hydraulic actuating cylinder (6) to flow out.
5. the hydraulic efficiency pressure system for lifting mechanism according to claim 3, wherein, be integrated with first throttle valve (10) in the described bi-bit bi-pass spring hydraulicchange-over valve (12), when the oil pressure of the entrance of described bi-bit bi-pass spring hydraulicchange-over valve (12) was 0, described first throttle valve (10) slowly flowed out the fluid in the epitrochoidal chamber (13) of described hydraulic actuating cylinder (6).
6. the hydraulic efficiency pressure system for lifting mechanism according to claim 3, wherein, described safety valve (7) also comprises the second flow regulating valve (9), and this second flow regulating valve (9) is connected between the epitrochoidal chamber (13) of described bi-bit bi-pass spring change-over valve (12) and described hydraulic actuating cylinder (6).
7. the hydraulic efficiency pressure system for lifting mechanism according to claim 1, wherein, described back pressure valve (8) is flow regulating valve.
8. the hydraulic efficiency pressure system for lifting mechanism according to claim 1, wherein, described back pressure valve (8) is arranged between the return opening of described fuel tank (1) and described lift valve (5).
9. the hydraulic efficiency pressure system for lifting mechanism according to claim 1, wherein, described lift valve (5) has middle stop bit, stop bit in this, described fuel tank (1) is not connected with described hydraulic actuating cylinder (6).
10. the hydraulic efficiency pressure system for lifting mechanism according to claim 1 wherein, is connected with by pass valve (4) between the outlet of described Hydraulic Pump (3) and the described fuel tank (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110240479.2A CN102951557B (en) | 2011-08-19 | 2011-08-19 | Hydraulic system used for elevating mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110240479.2A CN102951557B (en) | 2011-08-19 | 2011-08-19 | Hydraulic system used for elevating mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102951557A true CN102951557A (en) | 2013-03-06 |
| CN102951557B CN102951557B (en) | 2015-02-18 |
Family
ID=47761034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110240479.2A Active CN102951557B (en) | 2011-08-19 | 2011-08-19 | Hydraulic system used for elevating mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102951557B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108916132A (en) * | 2018-07-31 | 2018-11-30 | 宁波市镇海海威液压科技有限公司 | A kind of device of accurate control hydraulic cylinder raising and lowering |
| CN112777523A (en) * | 2019-11-05 | 2021-05-11 | 中冶宝钢技术服务有限公司 | Auxiliary dismounting trolley for double-layer cinder valve |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101210581A (en) * | 2006-12-28 | 2008-07-02 | 中国国际海运集装箱(集团)股份有限公司 | Self-reducing resisting hydraulic cylinder |
| CN201391504Y (en) * | 2009-04-29 | 2010-01-27 | 深圳东风汽车有限公司 | Safety hydraulic oil cylinder |
| CN201395379Y (en) * | 2009-05-05 | 2010-02-03 | 方松柏 | Elevating mechanism hydraulic system for dustbin |
| JP2010254380A (en) * | 2009-04-21 | 2010-11-11 | Kobelco Cranes Co Ltd | Hose reel winding device for mobile crane |
-
2011
- 2011-08-19 CN CN201110240479.2A patent/CN102951557B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101210581A (en) * | 2006-12-28 | 2008-07-02 | 中国国际海运集装箱(集团)股份有限公司 | Self-reducing resisting hydraulic cylinder |
| JP2010254380A (en) * | 2009-04-21 | 2010-11-11 | Kobelco Cranes Co Ltd | Hose reel winding device for mobile crane |
| CN201391504Y (en) * | 2009-04-29 | 2010-01-27 | 深圳东风汽车有限公司 | Safety hydraulic oil cylinder |
| CN201395379Y (en) * | 2009-05-05 | 2010-02-03 | 方松柏 | Elevating mechanism hydraulic system for dustbin |
Non-Patent Citations (1)
| Title |
|---|
| 万强，许远平，潘玉龙: "举升机构液压系统的动力仿真分析", 《空军雷达学院学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108916132A (en) * | 2018-07-31 | 2018-11-30 | 宁波市镇海海威液压科技有限公司 | A kind of device of accurate control hydraulic cylinder raising and lowering |
| CN112777523A (en) * | 2019-11-05 | 2021-05-11 | 中冶宝钢技术服务有限公司 | Auxiliary dismounting trolley for double-layer cinder valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102951557B (en) | 2015-02-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203879828U (en) | Hydraulic control system for lateral-loading compression-type garbage truck | |
| CN102889273B (en) | Electro-hydraulic system for recycling and releasing potential energy of engineering machinery | |
| CN111810477B (en) | Hydraulic system for bolt lifting device | |
| CN102602385B (en) | Parking braking system and engineering machinery | |
| CN201203530Y (en) | Supercharging device of emulsifiable solution valve integrated test stand | |
| CN110228774A (en) | A kind of fork truck and forklift door frame hydraulic system for lifting | |
| CN104214147A (en) | Sudden-changing load energy absorption device of shield propelling hydraulic system | |
| CN202643158U (en) | Constant tension hoisting operation wave compensation device | |
| CN102155444A (en) | Hydraulic actuator for automatic drainage system of coal mine | |
| CN103591064A (en) | Landing leg control hydraulic system and engineering vehicle | |
| CN211423044U (en) | Closed loop system of differential cylinder | |
| CN203543914U (en) | Supporting leg control hydraulic system and engineering vehicle | |
| CN203582302U (en) | Control valve bank, hydraulic control system and truck crane | |
| CN102951557B (en) | Hydraulic system used for elevating mechanism | |
| CN202012516U (en) | Hydraulic actuator for automatic drainage system of coal mine | |
| CN107061377B (en) | A kind of heavy duty lifting electrohydraulic control system | |
| CN201425044Y (en) | Pneumatic reversing valve for dump trucks | |
| CN103671295A (en) | Closed energy storage hydraulic system | |
| CN109469661A (en) | A kind of garbage-compressing double pump system hydraulic valve bank | |
| CN105570216A (en) | Automatic leveling hydraulic system of telescopic boom forklift tipping bucket for preventing follow-up of big arm | |
| CN107830000A (en) | Stacker-reclaimer pitching hydraulic system | |
| CN203604283U (en) | Potential energy recovery hydraulic system and engineering machine | |
| CN202811607U (en) | Device preventing oil cylinder form moving forward and crane | |
| CN208106865U (en) | A kind of regeneration support leg valve and the leg control system equipped with the valve | |
| CN201801331U (en) | Self-suction type oil cylinder anti-overturn device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |