CN204200730U - A kind of hydraulic system of pin-type lifting device - Google Patents
A kind of hydraulic system of pin-type lifting device Download PDFInfo
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- CN204200730U CN204200730U CN201420601472.8U CN201420601472U CN204200730U CN 204200730 U CN204200730 U CN 204200730U CN 201420601472 U CN201420601472 U CN 201420601472U CN 204200730 U CN204200730 U CN 204200730U
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- 239000012530 fluid Substances 0.000 claims description 76
- 239000000945 filler Substances 0.000 claims description 39
- 230000001360 synchronised effect Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 79
- 239000010720 hydraulic oil Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000001595 contractor effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
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Abstract
The utility model relates to a kind of hydraulic system of pin-type lifting device, comprise Fill valve group, safety valve group, hoist cylinder, hydraulic lock, first diffluence motor, second diffluence motor, first one-way throttle valve, second one-way throttle valve, first two-way plug-in valve, second two-way plug-in valve, proportional reversing valve, three-position four-way electromagnetic directional valve, two four-way electromagnetic reversing valves, main oil passage, auxiliary feed-oil road, oil circuit, pass through synchronous diffluence motor, realize the synchronization motion of the low precision of many group hoist cylinders, separately repairing operation is carried out to the oil cylinder that movement speed is slow by Fill valve again, thus realize accurate synchronization control.The utility model reduces the manufacture difficulty of structural member and control system, has high stability and Economy.
Description
Technical field
The utility model relates to a kind of hydraulic system of pin-type lifting device, particularly about a kind of hydraulic system that can be applicable to self-lifting wind turbine installation vessel, self-elevating drilling platform and self-lifting life supporting platform.
Background technique
At present, surface hydraulic formula lowering or hoisting gear mainly bolt-type.Sea faring pin-type lifting device adopts oil cylinder to realize lifting action, and mainly contain three kinds of methods of synchronization, the first is installation and guide device, as directional post, makes hoist cylinder realize mechanical synchronization; The second strictly processes pile pipe, make it have guide function, realize mechanical synchronization, the third is equal proportion of installation selector valve on every bar oil cylinder, oil cylinder is realized synchronous by electrical control, wherein mechanical synchronization mode needs high-precision processing, and electric control synchronous mode needs complicated control system, and poor stability.
Model utility content
Main purpose of the present utility model is to provide a kind of hydraulic system of pin-type lifting device, pass through synchronous diffluence motor, realize the synchronization motion of the low precision of many group hoist cylinders, more separately repairing operation is carried out to the oil cylinder that movement speed is slow by Fill valve, thus realize accurate synchronization control.The utility model reduces the manufacture difficulty of structural member and control system, has high stability and Economy.
The purpose of this utility model is realized by following technological scheme:
A kind of hydraulic system of pin-type lifting device, comprise Fill valve group, safety valve group, hoist cylinder, hydraulic lock, first diffluence motor, second diffluence motor, first one-way throttle valve, second one-way throttle valve, first two-way plug-in valve, second two-way plug-in valve, proportional reversing valve, three-position four-way electromagnetic directional valve, two four-way electromagnetic reversing valves, main oil passage, auxiliary feed-oil road, oil circuit, the filler opening that it is characterized in that described Fill valve group respectively with the 3rd of described three-position four-way electromagnetic directional valve, four hydraulic fluid ports are communicated with, the oil outlet of described Fill valve group respectively with the rodless cavity of described hoist cylinder, rod chamber is communicated with,
The filler opening of described safety valve group is communicated with the rodless cavity of described hoist cylinder, rod chamber respectively, and described safety valve group oil outlet is communicated with described oil circuit;
First hydraulic fluid port of described hydraulic lock is communicated with the oil outlet of described first diffluence motor, the second diffluence motor respectively, described hydraulic lock second hydraulic fluid port is communicated with the rodless cavity of described hoist cylinder, rod chamber respectively, the control port of described hydraulic lock is communicated with the 3rd hydraulic fluid port of described two four-way electromagnetic reversing valves, and the drain tap of described hydraulic lock is communicated with described oil circuit;
The filler opening of described first diffluence motor is communicated with the first hydraulic fluid port of the oil outlet of described first one-way throttle valve, described first two-way plug-in valve, and the oil outlet of described first diffluence motor is communicated with the rod chamber of described hoist cylinder respectively;
The filler opening of described second diffluence motor is communicated with the first hydraulic fluid port of the oil outlet of the second one-way throttle valve, the second two-way plug-in valve, and the oil outlet of described second diffluence motor is communicated with the rodless cavity of described hoist cylinder respectively;
The filler opening of described first one-way throttle valve is communicated with the 3rd hydraulic fluid port of described proportional reversing valve, and the oil outlet of described first one-way throttle valve is communicated with the first hydraulic fluid port of the filler opening of described first diffluence motor, described first two-way plug-in valve;
The filler opening of described second one-way throttle valve is communicated with the 3rd hydraulic fluid port of described proportional reversing valve, and the oil outlet of described second one-way throttle valve is communicated with the first hydraulic fluid port of the filler opening of described second diffluence motor, described second two-way plug-in valve;
First hydraulic fluid port of described first two-way plug-in valve is communicated with the oil outlet of the filler opening of described first diffluence motor, described first one-way throttle valve, and the second hydraulic fluid port of described first two-way plug-in valve is communicated with described oil circuit;
First hydraulic fluid port of described second two-way plug-in valve is communicated with the oil outlet of the filler opening of described second diffluence motor, described second one-way throttle valve, and the second hydraulic fluid port of described second two-way plug-in valve is communicated with described oil circuit;
First hydraulic fluid port of described proportional reversing valve is communicated with described main oil passage, second hydraulic fluid port of described proportional reversing valve is communicated with described oil circuit, 3rd hydraulic fluid port of described proportional reversing valve is communicated with the filler opening of described first one-way throttle valve, and the 4th hydraulic fluid port of described proportional reversing valve is communicated with the filler opening of described second one-way throttle valve;
First hydraulic fluid port of described three position four-way directional control valve is communicated with described auxiliary feed-oil road, and the second hydraulic fluid port of described three position four-way directional control valve is communicated with described oil circuit, and third and fourth hydraulic fluid port of described three position four-way directional control valve is communicated with the filler opening of described Fill valve group respectively;
First hydraulic fluid port of described two four-way electromagnetic reversing valves is communicated with described auxiliary feed-oil road, second and third hydraulic fluid port of described two four-way electromagnetic reversing valves is communicated with described oil circuit respectively, and the 4th hydraulic fluid port of described two four-way electromagnetic reversing valves is communicated with the control port of described hydraulic lock.
The beneficial effects of the utility model: the utility model is owing to adopting technique scheme, pass through synchronous diffluence motor, realize the synchronization motion of the low precision of many group hoist cylinders, more separately repairing operation is carried out to the oil cylinder that movement speed is slow by Fill valve, thus realize accurate synchronization control.The utility model reduces the manufacture difficulty of structural member and control system, has high stability and Economy.
Below in conjunction with drawings and Examples, the utility model is described further.
Accompanying drawing illustrates:
Fig. 1 is the utility model structural representation.
Major label description in figure:
1-Fill valve group; 2-safety valve group; 3-hoist cylinder; 4-hydraulic lock; 5-the first diffluence motor; 6-the second diffluence motor; 7-the first one-way throttle valve; 8-the second one-way throttle valve; 9-the first two-way plug-in valve; 10-the second two-way plug-in valve; 11-proportional reversing valve; 12-three-position four-way electromagnetic directional valve; 13-two four-way electromagnetic reversing valves; P1-main oil passage; P2-auxiliary feed-oil road; T-oil circuit.
Embodiment
Below in conjunction with accompanying drawing and example, the utility model is described in detail.
As shown in Figure 1, the utility model comprises Fill valve group 1, safety valve group 2, hoist cylinder 3, hydraulic lock 4, first diffluence motor 5, second diffluence motor 6, first one-way throttle valve 7, second one-way throttle valve 8, first two-way plug-in valve 9, second two-way plug-in valve 10, proportional reversing valve 11, three-position four-way electromagnetic directional valve 12, two four-way electromagnetic reversing valves 13, main oil passage P1, auxiliary feed-oil road P2, oil circuit T, the filler opening of Fill valve group 1 respectively with the 3rd of three-position four-way electromagnetic directional valve 12, four hydraulic fluid ports are communicated with, the oil outlet of Fill valve group 1 respectively with the rodless cavity of hoist cylinder 3, rod chamber is communicated with, Fill valve group 1 is for stretching out hoist cylinder 3 and the accurate control of contractive action,
The filler opening of safety valve group 2 is communicated with the rodless cavity of hoist cylinder 3, rod chamber respectively, and safety valve group 2 oil outlet is communicated with oil circuit T, and safety valve group 2 is for the protection of hoist cylinder 3, and when oil cylinder internal pressure is too high, safety valve group opens pressure release;
First hydraulic fluid port of hydraulic lock 4 is communicated with the oil outlet of the first diffluence motor 5, second diffluence motor 6 respectively, hydraulic lock 4 second hydraulic fluid port is communicated with the rodless cavity of hoist cylinder 3, rod chamber respectively, the control port of hydraulic lock 4 is communicated with the 3rd hydraulic fluid port of two four-way electromagnetic reversing valves 13, the drain tap of hydraulic lock 4 is communicated with oil circuit T, hydraulic lock 4, for locking hoist cylinder 3, can make hoist cylinder 3 stop at an arbitrary position and not slip down;
The filler opening of the first diffluence motor 5 is communicated with the first hydraulic fluid port of the oil outlet of the first one-way throttle valve 7, the first two-way plug-in valve 9, and the oil outlet of the first diffluence motor 5 is communicated with the rod chamber of hoist cylinder 3 respectively; The filler opening of the second diffluence motor 6 is communicated with the first hydraulic fluid port of the oil outlet of the second one-way throttle valve 8, the second two-way plug-in valve 10, and the oil outlet of the second diffluence motor 6 is communicated with the rodless cavity of hoist cylinder 3 respectively; Hydraulic oil is divided into multichannel by the first diffluence motor 5, second diffluence motor 6, for stretching out hoist cylinder 3 and the low precision controlling of contractive action;
The filler opening of the first one-way throttle valve 7 is communicated with the 3rd hydraulic fluid port of proportional reversing valve 11, and the oil outlet of the first one-way throttle valve 7 is communicated with the first hydraulic fluid port of the filler opening of the first diffluence motor 5, the first two-way plug-in valve 9; The filler opening of the second one-way throttle valve 8 is communicated with the 3rd hydraulic fluid port of proportional reversing valve 11, and the oil outlet of the second one-way throttle valve 8 is communicated with the first hydraulic fluid port of the filler opening of the second diffluence motor 6, the second two-way plug-in valve 10; First one-way throttle valve 7, second one-way throttle valve 8, for controlling hoist cylinder 3 movement speed, when negative load appears in system, ensures the having stable behavior of hoist cylinder 3, controlled;
First hydraulic fluid port of the first two-way plug-in valve 9 is communicated with the oil outlet of the filler opening of the first diffluence motor 5, the first one-way throttle valve 7, and the second hydraulic fluid port of the first two-way plug-in valve 9 is communicated with oil circuit T; First hydraulic fluid port of the second two-way plug-in valve 10 is communicated with the oil outlet of the filler opening of the second diffluence motor 6, described second one-way throttle valve 8, and the second hydraulic fluid port of described second two-way plug-in valve 10 is communicated with described oil circuit T; During the first two-way plug-in valve 9, second two-way plug-in valve 10 load positive for system, the quick oil return of system, reduces system back pressure;
First hydraulic fluid port of proportional reversing valve 11 is communicated with main oil passage P1, second hydraulic fluid port of proportional reversing valve 11 is communicated with oil circuit T, 3rd hydraulic fluid port of proportional reversing valve 11 is communicated with the filler opening of the first one-way throttle valve, 4th hydraulic fluid port of proportional reversing valve 11 is communicated with the filler opening of the second one-way throttle valve, and proportional reversing valve 11 stretches out and the speed of shrinking and direction for controlling hoist cylinder 3;
First hydraulic fluid port of three position four-way directional control valve 12 is communicated with auxiliary feed-oil road P2, second hydraulic fluid port of three position four-way directional control valve 12 is communicated with oil circuit T, third and fourth hydraulic fluid port of three position four-way directional control valve 12 is communicated with the filler opening of Fill valve group 1 respectively, and three position four-way directional control valve 12 is for controlling the direction of Fill valve group 1 oil-feed and oil return;
First hydraulic fluid port of two four-way electromagnetic reversing valves 13 is communicated with auxiliary feed-oil road P2, second and third hydraulic fluid port of two four-way electromagnetic reversing valves 13 is communicated with oil circuit T respectively, 4th hydraulic fluid port of two four-way electromagnetic reversing valves 13 is communicated with the control port of hydraulic lock 4, and two four-way electromagnetic reversing valves 13 are for the opening and closing of hydraulic control lock 4.
Utility model works principle, specific as follows:
The positive load shrinkage operation of hoist cylinder 3: proportional reversing valve 11 left side electromagnet obtains electric, the pressure oil of main oil passage P1 is after the 3rd hydraulic fluid port outflow of proportional reversing valve 11, through the first one-way throttle valve 7, enter the first diffluence motor 5, be divided into 4 tunnels, through the hydraulic lock 4 of rod chamber end, enter the rod chamber of hoist cylinder 3, two four-way electromagnetic reversing valve 13 electromagnet obtain electric simultaneously, hydraulic lock 4 is opened by the pressure oil of auxiliary feed-oil road P2, second two-way plug-in valve 10 electromagnet obtains electric, second two-way plug-in valve 10 is opened, the hydraulic oil of hoist cylinder 3 rodless cavity is by the hydraulic lock 4 of rodless cavity end, second diffluence motor 6, second two-way plug-in valve 10, enter oil circuit T, hoist cylinder 3 shrinks, realize pile pulling operation.
Hoist cylinder 3 load shrinkage operation: proportional reversing valve 11 left side electromagnet obtains electric, the pressure oil of main oil passage P1 flows out from proportional reversing valve 11 the 3rd hydraulic fluid port, through the first one-way throttle valve 7, enter the first diffluence motor 5, be divided into 4 tunnels, through the hydraulic lock 4 of rod chamber end, enter the rod chamber of hoist cylinder 3, two four-way electromagnetic reversing valve 13 electromagnet obtain electric simultaneously, hydraulic lock 4 is opened by the pressure oil of auxiliary feed-oil road P2, the hydraulic oil of hoist cylinder 3 rodless cavity is by the hydraulic lock 4 of rodless cavity end, second diffluence motor 6, second one-way throttle valve 8, proportional reversing valve 11, enter oil circuit T, hoist cylinder 3 shrinks, implementation platform declines.
Operation is stretched out in the positive load of hoist cylinder 3: on the right of proportional reversing valve 11, electromagnet obtains electric, the pressure oil of main oil passage P1 flows out from proportional reversing valve 11 the 4th hydraulic fluid port, through the second one-way throttle valve 8, enter the second diffluence motor 6, be divided into 4 tunnels, through the hydraulic lock 4 of rodless cavity end, enter the rodless cavity of hoist cylinder 3, two four-way electromagnetic reversing valve 13 electromagnet obtain electric simultaneously, hydraulic lock 4 is opened by the pressure oil of auxiliary feed-oil road P2, first two-way plug-in valve 9 electromagnet obtains electric, first two-way plug-in valve 9 is opened, the hydraulic oil of hoist cylinder 3 rodless cavity is by the hydraulic lock 4 of rod chamber end, first diffluence motor 5, first two-way plug-in valve, 9, enter oil circuit T, hoist cylinder 3 stretches out, implementation platform rises.
Operation is stretched out in hoist cylinder 3 load: on the right of proportional reversing valve 11, electromagnet obtains electric, the pressure oil of main oil passage P1 flows out from proportional reversing valve 11 the 4th hydraulic fluid port, through the second one-way throttle valve 8, enter the second diffluence motor 6, be divided into 4 tunnels, through the hydraulic lock 4 of rodless cavity end, enter the rodless cavity of hoist cylinder 3, two four-way electromagnetic reversing valve 13 electromagnet obtain electric simultaneously, hydraulic lock 4 is opened by the pressure oil of auxiliary feed-oil road P2, the hydraulic oil of hoist cylinder 3 rodless cavity is by the hydraulic lock 4 of rod chamber end, first diffluence motor 5, first one-way throttle valve 7, proportional reversing valve 11, enter oil circuit T, hoist cylinder 3 stretches out, realize pitching pile operation.
The above, it is only preferred embodiment of the present utility model, not any pro forma restriction is done to the utility model, every above embodiment is done according to technical spirit of the present utility model any simple modification, equivalent variations and modification, all still belong in the scope of technical solutions of the utility model.
Claims (1)
1. the hydraulic system of a pin-type lifting device, comprise Fill valve group, safety valve group, hoist cylinder, hydraulic lock, first diffluence motor, second diffluence motor, first one-way throttle valve, second one-way throttle valve, first two-way plug-in valve, second two-way plug-in valve, proportional reversing valve, three-position four-way electromagnetic directional valve, two four-way electromagnetic reversing valves, main oil passage, auxiliary feed-oil road, oil circuit, the filler opening that it is characterized in that described Fill valve group respectively with the 3rd of described three-position four-way electromagnetic directional valve, four hydraulic fluid ports are communicated with, the oil outlet of described Fill valve group respectively with the rodless cavity of described hoist cylinder, rod chamber is communicated with,
The filler opening of described safety valve group is communicated with the rodless cavity of described hoist cylinder, rod chamber respectively, and described safety valve group oil outlet is communicated with described oil circuit;
First hydraulic fluid port of described hydraulic lock is communicated with the oil outlet of described first diffluence motor, the second diffluence motor respectively, described hydraulic lock second hydraulic fluid port is communicated with the rodless cavity of described hoist cylinder, rod chamber respectively, the control port of described hydraulic lock is communicated with the 3rd hydraulic fluid port of described two four-way electromagnetic reversing valves, and the drain tap of described hydraulic lock is communicated with described oil circuit;
The filler opening of described first diffluence motor is communicated with the first hydraulic fluid port of the oil outlet of described first one-way throttle valve, described first two-way plug-in valve, and the oil outlet of described first diffluence motor is communicated with the rod chamber of described hoist cylinder respectively;
The filler opening of described second diffluence motor is communicated with the first hydraulic fluid port of the oil outlet of the second one-way throttle valve, the second two-way plug-in valve, and the oil outlet of described second diffluence motor is communicated with the rodless cavity of described hoist cylinder respectively;
The filler opening of described first one-way throttle valve is communicated with the 3rd hydraulic fluid port of described proportional reversing valve, and the oil outlet of described first one-way throttle valve is communicated with the first hydraulic fluid port of the filler opening of described first diffluence motor, described first two-way plug-in valve;
The filler opening of described second one-way throttle valve is communicated with the 3rd hydraulic fluid port of described proportional reversing valve, and the oil outlet of described second one-way throttle valve is communicated with the first hydraulic fluid port of the filler opening of described second diffluence motor, described second two-way plug-in valve;
First hydraulic fluid port of described first two-way plug-in valve is communicated with the oil outlet of the filler opening of described first diffluence motor, described first one-way throttle valve, and the second hydraulic fluid port of described first two-way plug-in valve is communicated with described oil circuit;
First hydraulic fluid port of described second two-way plug-in valve is communicated with the oil outlet of the filler opening of described second diffluence motor, described second one-way throttle valve, and the second hydraulic fluid port of described second two-way plug-in valve is communicated with described oil circuit;
First hydraulic fluid port of described proportional reversing valve is communicated with described main oil passage, second hydraulic fluid port of described proportional reversing valve is communicated with described oil circuit, 3rd hydraulic fluid port of described proportional reversing valve is communicated with the filler opening of described first one-way throttle valve, and the 4th hydraulic fluid port of described proportional reversing valve is communicated with the filler opening of described second one-way throttle valve;
First hydraulic fluid port of described three position four-way directional control valve is communicated with described auxiliary feed-oil road, and the second hydraulic fluid port of described three position four-way directional control valve is communicated with described oil circuit, and third and fourth hydraulic fluid port of described three position four-way directional control valve is communicated with the filler opening of described Fill valve group respectively;
First hydraulic fluid port of described two four-way electromagnetic reversing valves is communicated with described auxiliary feed-oil road, second and third hydraulic fluid port of described two four-way electromagnetic reversing valves is communicated with described oil circuit respectively, and the 4th hydraulic fluid port of described two four-way electromagnetic reversing valves is communicated with the control port of described hydraulic lock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420601472.8U CN204200730U (en) | 2014-10-17 | 2014-10-17 | A kind of hydraulic system of pin-type lifting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420601472.8U CN204200730U (en) | 2014-10-17 | 2014-10-17 | A kind of hydraulic system of pin-type lifting device |
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| Publication Number | Publication Date |
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| CN204200730U true CN204200730U (en) | 2015-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420601472.8U Expired - Lifetime CN204200730U (en) | 2014-10-17 | 2014-10-17 | A kind of hydraulic system of pin-type lifting device |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105134676A (en) * | 2015-09-09 | 2015-12-09 | 浙江日发精密机械股份有限公司 | Hydraulic system for lifting pallet changer of horizontal machining center |
| CN106246625A (en) * | 2016-08-05 | 2016-12-21 | 武汉船用机械有限责任公司 | Jack-up unit hydraulic control system |
| CN108584808A (en) * | 2018-06-05 | 2018-09-28 | 安徽合力股份有限公司 | A kind of low cost of reach truck accessory, single control hydraulic system |
| CN108980127A (en) * | 2018-09-05 | 2018-12-11 | 北京特种机械研究所 | A kind of three cylinder synchronous hydraulic control loops |
| CN109114057A (en) * | 2018-11-08 | 2019-01-01 | 重庆神工农业装备有限责任公司 | The hopper jacking system of hydraulic control dilatation |
| CN109604341A (en) * | 2018-11-07 | 2019-04-12 | 太原重工股份有限公司 | Punch and its big lid lifting locking control system |
| CN111664144A (en) * | 2020-04-22 | 2020-09-15 | 武汉船用机械有限责任公司 | Hydraulic system of bolt type lifting platform |
| CN111692144A (en) * | 2020-04-30 | 2020-09-22 | 武汉船用机械有限责任公司 | Impeller lifting and rotating system |
| CN111810477A (en) * | 2020-05-22 | 2020-10-23 | 武汉船用机械有限责任公司 | Hydraulic system for bolt lifting device |
-
2014
- 2014-10-17 CN CN201420601472.8U patent/CN204200730U/en not_active Expired - Lifetime
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105134676B (en) * | 2015-09-09 | 2017-04-12 | 浙江日发精密机械股份有限公司 | Hydraulic system for lifting pallet changer of horizontal machining center |
| CN105134676A (en) * | 2015-09-09 | 2015-12-09 | 浙江日发精密机械股份有限公司 | Hydraulic system for lifting pallet changer of horizontal machining center |
| CN106246625A (en) * | 2016-08-05 | 2016-12-21 | 武汉船用机械有限责任公司 | Jack-up unit hydraulic control system |
| CN106246625B (en) * | 2016-08-05 | 2018-03-20 | 武汉船用机械有限责任公司 | Jack-up unit hydraulic control system |
| CN108584808B (en) * | 2018-06-05 | 2024-05-28 | 安徽合力股份有限公司 | Low-cost single-control hydraulic system of forward forklift attachment |
| CN108584808A (en) * | 2018-06-05 | 2018-09-28 | 安徽合力股份有限公司 | A kind of low cost of reach truck accessory, single control hydraulic system |
| CN108980127A (en) * | 2018-09-05 | 2018-12-11 | 北京特种机械研究所 | A kind of three cylinder synchronous hydraulic control loops |
| CN109604341A (en) * | 2018-11-07 | 2019-04-12 | 太原重工股份有限公司 | Punch and its big lid lifting locking control system |
| CN109114057A (en) * | 2018-11-08 | 2019-01-01 | 重庆神工农业装备有限责任公司 | The hopper jacking system of hydraulic control dilatation |
| CN111664144B (en) * | 2020-04-22 | 2022-11-22 | 武汉船用机械有限责任公司 | Hydraulic system of bolt type lifting platform |
| CN111664144A (en) * | 2020-04-22 | 2020-09-15 | 武汉船用机械有限责任公司 | Hydraulic system of bolt type lifting platform |
| CN111692144A (en) * | 2020-04-30 | 2020-09-22 | 武汉船用机械有限责任公司 | Impeller lifting and rotating system |
| CN111810477A (en) * | 2020-05-22 | 2020-10-23 | 武汉船用机械有限责任公司 | Hydraulic system for bolt lifting device |
| CN111810477B (en) * | 2020-05-22 | 2022-08-12 | 武汉船用机械有限责任公司 | Hydraulic system for bolt lifting device |
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