CN103615419B - A kind of hydraulic bolt jacking system bolt device - Google Patents
A kind of hydraulic bolt jacking system bolt device Download PDFInfo
- Publication number
- CN103615419B CN103615419B CN201310532366.9A CN201310532366A CN103615419B CN 103615419 B CN103615419 B CN 103615419B CN 201310532366 A CN201310532366 A CN 201310532366A CN 103615419 B CN103615419 B CN 103615419B
- Authority
- CN
- China
- Prior art keywords
- oil
- hydraulic
- valve
- latch
- direction valve
- 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.)
- Active
Links
Landscapes
- Fluid-Pressure Circuits (AREA)
- Actuator (AREA)
Abstract
The invention discloses a kind of hydraulic bolt jacking system bolt device, belong to jacking system field.Described device includes: latch, hydraulic spring grease cup cylinder, threeway direction valve, overflow valve, hydraulic pump, fuel tank and for for hydraulic pump provide power hydraulic motor, latch is arranged on the telescopic end of hydraulic spring grease cup cylinder, the oil-in of hydraulic pump and oil-out oil-in with fuel tank and threeway direction valve respectively is connected, the oil-out of threeway direction valve and oil return opening are connected with hydraulic spring grease cup cylinder and fuel tank respectively, the oil-in of overflow valve is connected on the hydraulic circuit between threeway direction valve and hydraulic pump, and the oil-out of overflow valve is connected with fuel tank.The present invention is during inserting, extracting pin hole, and hydraulic motor has only in very short time hydraulic spring grease cup oil supply cylinder, it is to avoid in prior art, hydraulic motor needs to be chronically at the shortcoming of high load condition, saves energy, it is ensured that safety.
Description
Technical field
The present invention relates to jacking system field, particularly to a kind of hydraulic bolt jacking system bolt device.
Background technology
Along with deepening continuously of marine exploration and development, the research for self-elevating ocean platform is also subject to increasingly
The concern of many people.
Self-elevating ocean platform mainly include spud leg, spud leg supporting construction and mat, hull (platform) and
Jacking system, jacking system is connected with hull, by jacking system can drive hull along spud leg rise or
Decline.Wherein, jacking system can be divided into hydraulic bolt jacking system and teeth bar type up-down system according to structure.
Hydraulic bolt jacking system includes wedge bracket, hydraulic lifting mechanism and bolt device, wedge bracket two ends respectively with
Spud leg and hull connect, and hydraulic lifting mechanism is used for promoting wedge bracket to rise or fall along spud leg thus drives ship
Body lifts, and when reaching specified altitude assignment, bolt device inserts the pin hole of spud leg, thus positions.
Bolt device includes hydraulic pump, provides the hydraulic motor of power, two-way cylinder and latch for hydraulic pump,
Two-way cylinder promotes latch under the effect of hydraulic pump, it is achieved latch plug and unplug action.So that insert
When pin is promoted by hydraulic lifting mechanism or drops to spud leg hole site, can be properly inserted in pin hole, at present
The measure used is latch when promoting or drop to away from next spud leg hole certain distance, and two-way cylinder will
Latch is released so that latch is constantly subjected to a thrust to spud leg axle center in the process；Work as latch
When being raised or lowered spud leg hole site, latch will be taken advantage of a situation and will be pushed into spud leg hole, it is ensured that latch is inserted smoothly
Enter spud leg hole.
During realizing the present invention, inventor finds that prior art at least there is problems in that
Latch is during releasing until inserting spud leg hole, and hydraulic pump is constantly in high load condition, so,
Hydraulic motor needs persistently to do high capacity output, not only causes the waste of energy, and the heat of generation also can make
Oil circuit temperature rise, causes potential safety hazard.
Summary of the invention
Need constantly to two-way cylinder fuel feeding, to ensure that latch exists to solve hydraulic pump in prior art
The position arriving pin hole can be inserted smoothly, not only causes the waste of energy, and the heat produced also can
Making oil circuit temperature rise, the problem causing potential safety hazard, embodiments providing a kind of hydraulic bolt lifting is
System bolt device.Described technical scheme is as follows:
Embodiments providing a kind of hydraulic bolt jacking system bolt device, described device includes:
Latch, hydraulic spring grease cup cylinder, threeway direction valve, overflow valve, hydraulic pump, fuel tank and for for described
Hydraulic pump provides the hydraulic motor of power, and described latch is arranged on the telescopic end of described hydraulic spring grease cup cylinder, described
The oil-in of hydraulic pump and oil-out oil-in with described fuel tank and described threeway direction valve respectively is connected,
The oil-out of described threeway direction valve and oil return opening are connected with described hydraulic spring grease cup cylinder and described fuel tank respectively,
The oil-in of described overflow valve is connected on the hydraulic circuit between described threeway direction valve and described hydraulic pump,
The oil-out of described overflow valve is connected with described fuel tank；
Described threeway direction valve is electromagnetic three-way direction valve；
Described electromagnetic three-way direction valve includes that direction valve body and valve body, described direction valve body are provided with oil-feed
Mouth P, oil-out C and oil return inlet T, described valve body is used for selecting described oil inlet P and described oil return inlet T
In one be in opening, another is closed；
When described latch inserts spud leg, described oil inlet P is closed, and described oil return inlet T is opened；When described
Latch is when spud leg is extracted, and described oil inlet P is opened, and after latch rises or falls a segment distance, institute
State oil inlet P to be re-closing off.
In a kind of implementation of the embodiment of the present invention, described hydraulic spring grease cup cylinder includes:
Piston rod that cylinder body, the piston being arranged in described cylinder body, one end are connected with described piston and spring,
Described piston rod and described spring are separately positioned on the both sides of described piston, and described latch is arranged on described piston
Bar front end.
In the another kind of implementation of the embodiment of the present invention, described spring is metal spring.
In the another kind of implementation of the embodiment of the present invention, described spring is air spring.
In the another kind of implementation of the embodiment of the present invention, described device also includes: check valve, described list
It is arranged on the hydraulic circuit between the oil-out of described hydraulic pump and the oil-in of described threeway direction valve to valve
On, the most described check valve also in the oil-in of described overflow valve and described threeway direction valve oil-in it
Between.
In the another kind of implementation of the embodiment of the present invention, described valve body includes solenoid and is provided with through hole
Iron block, described iron block moves under the effect of described solenoid, so that oil-feed described in described through-hole alignment
In mouth P and described oil return inlet T one.
In the another kind of implementation of the embodiment of the present invention, described overflow valve is electromagnetic relief valve.
The technical scheme that the embodiment of the present invention provides has the benefit that
By latch is arranged on the telescopic end of hydraulic spring grease cup cylinder, when latch is not inserted into pin hole, latch exists
In hydraulic spring grease cup cylinder under the effect of spring, withstand spud leg, when latch is raised or lowered at pin hole, insert
Enter pin hole；And when latch is extracted pin hole by needs, use hydraulic motor and hydraulic pump to hydraulic spring grease cup
Oil supply cylinder so that in hydraulic spring grease cup cylinder, spring shortens, thus drives latch to extract pin hole, and on latch
After rising or declining a segment distance, can stop to hydraulic spring grease cup oil supply cylinder, spring recovers length, and latch is again
Withstanding spud leg, now hydraulic oil flows back to oil cylinder by overflow valve.Therefore, this bolt device is inserting, is extracting
During pin hole, it is only necessary within a very short time to hydraulic spring grease cup oil supply cylinder, now hydraulic motor is just located
In high load condition；And in other times, hydraulic oil is circulated by overflow valve, hydraulic motor
It is constantly in low-load.So this bolt device it can be avoided that in prior art hydraulic motor be chronically at height
The shortcoming of load condition, saves energy, it is ensured that safety.
Accompanying drawing explanation
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, institute in embodiment being described below
The accompanying drawing used is needed to be briefly described, it should be apparent that, the accompanying drawing in describing below is only the present invention
Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work,
Other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the hydraulic bolt jacking system bolt device that the embodiment of the present invention provides；
Fig. 2 is the structural representation during latch decline of embodiment of the present invention offer；
Fig. 3 is the structural representation during latch insertion spud leg of embodiment of the present invention offer；
Fig. 4 is the latch that the embodiment of the present invention provides structural representation when extracting spud leg.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to the present invention
Embodiment is described in further detail.
Embodiment
Embodiments providing a kind of hydraulic bolt jacking system bolt device, this bolt device is permissible
It is applicable to hydraulic bolt cellular type jacking system, is specifically located at the hydraulic lifting mechanism of lowering or hoisting gear or solid stake
On frame, seeing Fig. 1～4, this device includes:
Latch 1, hydraulic spring grease cup cylinder 2, threeway direction valve 3, overflow valve 4, hydraulic pump 5, fuel tank 6 and use
In providing the hydraulic motor 7 of power for this hydraulic pump 5, latch 1 is arranged on the telescopic end of hydraulic spring grease cup cylinder 2,
The oil-in of hydraulic pump 5 and oil-out oil-in with fuel tank 6 and threeway direction valve 3 respectively is connected, and three
Oil-out and the oil return opening of logical direction valve 3 are connected with hydraulic spring grease cup cylinder 2 and fuel tank 6 respectively, overflow valve 4
Oil-in be connected on the hydraulic circuit between threeway direction valve 3 and hydraulic pump 5, overflow valve 4 fuel-displaced
Mouth is connected with fuel tank 6.
Specifically, seeing Fig. 1, above-mentioned threeway direction valve 3 can arrange two valve positions, during right valve position, threeway
The oil-in of direction valve 3 is closed, and hydraulic oil cannot enter hydraulic spring grease cup by the oil-in of threeway direction valve 3
Cylinder 2, meanwhile, the oil return opening of threeway direction valve 3 is opened, and the hydraulic oil in hydraulic spring grease cup cylinder 2 passes through threeway side
Oil return opening to valve 3 flows back to oil cylinder 6, and the spring in hydraulic spring grease cup cylinder 2 recovers, and promotes latch 1 to extend, from
And withstand spud leg 10, and the hydraulic oil that hydraulic pump 5 oil-out flows out cannot pass through threeway direction valve 3, can only
Being flowed back to oil cylinder 6 by overflow valve 4, now hydraulic motor 7 is in low-load state, as shown in Figure 2.At latch
During the position that 1 is raised or lowered to pin hole, may be inserted into the pin hole of spud leg 10, such as Fig. 3.Left valve position
Time, the oil-in of threeway direction valve 3 opens, hydraulic oil under the effect of hydraulic pump 5 through threeway direction valve 3
Oil-in enter hydraulic spring grease cup cylinder 2, hydraulic oil produce pressure the spring in hydraulic spring grease cup cylinder 2 is shortened,
Thus drive latch 1 to retract, such that it is able to make latch 1 extract, now hydraulic motor 7 is in high capacity shape
State, as shown in Figure 4, after latch 1 rises or falls a segment distance, can make latch 1 with fuel cut-off
Again spud leg 10 is withstood.Therefore, the bolt device that the present embodiment provides has only to when extracting pin hole, right
Hydraulic spring grease cup cylinder 1 carries out fuel feeding i.e. hydraulic motor 7 and is in high load condition, decreases energy expenditure, simultaneously
Also reduce the generation of heat, it is ensured that safety.
Specifically, hydraulic spring grease cup cylinder 2 includes: cylinder body 21, the piston 22 being arranged in cylinder body 21, one end
The piston rod 23 being connected with piston 22 and spring 24, piston rod 23 and spring 24 are separately positioned on piston
The both sides of 22, latch 1 is arranged on piston rod 23 front end.Wherein, piston rod 23 is arranged on a left side for piston 22
Limit, spring 24 is arranged on the right of piston.
As it is shown in figure 1, in the present embodiment, this spring 24 can be metal spring.In further embodiment
In, this spring 24 can also be air spring.
Further, this device also includes: check valve 8, and this check valve 8 is arranged on the oil-out of hydraulic pump 5
With on the hydraulic circuit between the oil-in of threeway direction valve 3, this check valve 8 is also in overflow valve 4 simultaneously
Oil-in and the oil-in of threeway direction valve 3 between.When threeway direction valve 3 is in left valve position, hydraulic pressure
Pump 5 is hydraulic spring grease cup cylinder 2 fuel feeding, and now latch 1 is in retracted mode, if now latch 1 is by machinery
Impact, can produce impact to the hydraulic oil in hydraulic spring grease cup cylinder 2, and this impact can be transmitted along with hydraulic circuit,
Hydraulic pump 5 and whole hydraulic circuit are produced impact, but due to the existence of check valve 8, this impulsive force meeting
Be truncated at check valve, such that it is able to latch 1 by mechanical shock when, slow down mechanical shock pair
The impact of hydraulic circuit.
Further, threeway direction valve 3 can be electromagnetic three-way direction valve.
As it is shown on figure 3, electromagnetic three-way direction valve 3 includes direction valve body 31 and valve body 32, direction valve body
31 are provided with oil inlet P, oil-out C and oil return inlet T, and valve body 32 is used for selecting oil inlet P and oil return opening
One in T is in opening, and another is closed.
Wherein, valve body 32 includes solenoid 321 and is provided with the iron block 322 of through hole, and iron block 322 is at electromagnetism
Move under the effect of coil 321, so that in through-hole alignment oil inlet P and oil return inlet T.
Further, this overflow valve 4 can be electromagnetic relief valve.When threeway direction valve is in left valve position,
Electromagnetic relief valve is in high pressure conditions, and hydraulic oil will not flow back to fuel tank at overflow valve, and when threeway direction valve
When being in right valve position, electromagnetic relief valve is in low-pressure state, and hydraulic oil cannot be introduced into threeway direction valve, can only
Fuel tank is flowed back to from overflow valve.
Further, this device also includes the radiator 9 being arranged on fuel tank 6.Due to, the embodiment of the present invention
The device provided need not always to hydraulic spring grease cup oil supply cylinder so that the heat that whole device produces is few, therefore
Can suitably reduce the power of used radiator, save cost.
The embodiment of the present invention by being arranged on the telescopic end of hydraulic spring grease cup cylinder by latch, when latch is not inserted into latch
Kong Shi, latch under the effect of spring, withstands spud leg in hydraulic spring grease cup cylinder, when latch is raised or lowered to insert
Time at pin-and-hole, insert pin hole；And when latch is extracted pin hole by needs, use hydraulic motor and hydraulic pressure
Pump is to hydraulic spring grease cup oil supply cylinder so that in hydraulic spring grease cup cylinder, spring shortens, thus drives latch to extract pin hole,
And after latch rises or falls a segment distance, can stop to hydraulic spring grease cup oil supply cylinder, spring recovers length,
Latch withstands spud leg again, and now hydraulic oil flows back to oil cylinder by overflow valve.Therefore, this bolt device is being inserted
During entering, extracting pin hole, it is only necessary within a very short time to hydraulic spring grease cup oil supply cylinder, now hydraulic pressure
Motor is just in high load condition；And in other times, hydraulic oil is circulated by overflow valve,
Hydraulic motor is constantly in low-load.So this bolt device it can be avoided that in prior art hydraulic motor long
Phase is in the shortcoming of high load condition, saves energy, it is ensured that safety.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all the present invention's
Within spirit and principle, any modification, equivalent substitution and improvement etc. made, should be included in the present invention's
Within protection domain.
Claims (8)
1. a hydraulic bolt jacking system bolt device, described device includes:
Latch (1), overflow valve (4), hydraulic pump (5), fuel tank (6) and for for described hydraulic pump (5)
There is provided the hydraulic motor (7) of power, it is characterised in that also include hydraulic spring grease cup cylinder (2) and threeway direction valve
(3), described latch (1) is arranged on the telescopic end of described hydraulic spring grease cup cylinder (2), described hydraulic pump (5)
Oil-in and oil-out oil-in with described fuel tank (6) and described threeway direction valve (3) respectively be connected,
The oil-out of described threeway direction valve (3) and oil return opening respectively with described hydraulic spring grease cup cylinder (2) and described oil
Case (6) connects, and the oil-in of described overflow valve (4) is connected to described threeway direction valve (3) and described liquid
On hydraulic circuit between press pump (5), the oil-out of described overflow valve (4) is connected with described fuel tank (6)；
Described threeway direction valve (3) is electromagnetic three-way direction valve；
Described electromagnetic three-way direction valve (3) includes direction valve body (31) and valve body (32), described direction
Valve body (31) is provided with oil inlet P, oil-out C and oil return inlet T, and described valve body (32) is used for selecting
One in described oil inlet P and described oil return inlet T is in opening, and another is closed；
When described latch (1) inserts spud leg (10), described oil inlet P is closed, and described oil return inlet T is opened
Open；When described latch (1) is extracted from spud leg (10), described oil inlet P is opened, and when latch (1)
After rising or falling a segment distance, described oil inlet P is re-closing off.
Device the most according to claim 1, it is characterised in that described hydraulic spring grease cup cylinder (2) including:
Cylinder body (21), the piston (22) being arranged in described cylinder body (21), one end and described piston (22)
The piston rod (23) connected and spring (24), described piston rod (23) and described spring (24) are respectively
Being arranged on the both sides of described piston (22), described latch (1) is arranged on described piston rod (23) front end.
Device the most according to claim 2, it is characterised in that described spring (24) is metal spring.
Device the most according to claim 2, it is characterised in that described spring (24) is air spring.
Device the most according to claim 1, it is characterised in that described device also includes: check valve (8),
Described check valve (8) is arranged on the oil-out of described hydraulic pump (5) and entering of described threeway direction valve (3)
On hydraulic circuit between hydraulic fluid port, the most described check valve (8) is also in the oil-feed of described overflow valve (4)
Between mouth and the oil-in of described threeway direction valve (3).
Device the most according to claim 1, it is characterised in that described valve body (32) includes electromagnetic wire
Enclosing (321) and be provided with the iron block (322) of through hole, described iron block (322) is in described solenoid (321)
Effect under move, so that oil inlet P described in described through-hole alignment and in described oil return inlet T.
Device the most according to claim 1, it is characterised in that described overflow valve (4) is that electromagnetism overflows
Stream valve.
8. according to the device described in any one of claim 1～7, it is characterised in that described device also includes setting
Put the radiator (9) on described fuel tank (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310532366.9A CN103615419B (en) | 2013-10-31 | 2013-10-31 | A kind of hydraulic bolt jacking system bolt device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310532366.9A CN103615419B (en) | 2013-10-31 | 2013-10-31 | A kind of hydraulic bolt jacking system bolt device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103615419A CN103615419A (en) | 2014-03-05 |
| CN103615419B true CN103615419B (en) | 2016-09-21 |
Family
ID=50166133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310532366.9A Active CN103615419B (en) | 2013-10-31 | 2013-10-31 | A kind of hydraulic bolt jacking system bolt device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103615419B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103994111B (en) * | 2014-04-16 | 2016-01-20 | 武汉船用机械有限责任公司 | A kind of hydraulic bolt lift platform hydraulic control system |
| CN105298954A (en) * | 2015-11-25 | 2016-02-03 | 上海电气液压气动有限公司 | Hydraulic station system |
| CN106194866B (en) * | 2016-08-25 | 2018-06-05 | 武汉船用机械有限责任公司 | The continuous lifting hydraulic control system of ocean platform |
| CN110864014B (en) * | 2019-11-29 | 2021-08-13 | 四川宝石机械钻采设备有限责任公司 | Hydraulic power assisting system of quick connecting device of fracturing manifold sledge |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2240530Y (en) * | 1995-03-02 | 1996-11-20 | 中国船舶工业总公司第七研究院第七○四研究所 | Rotary arm positioning mechanism of inner liner disintegrate machine for metal-mixing trolley |
| DE10156598A1 (en) * | 2001-11-17 | 2003-05-28 | Still Gmbh | Mobile work machine with an electrically driven steering pump |
| CN201593183U (en) * | 2009-12-09 | 2010-09-29 | 王国治 | Hydraulic lifting device of drilling platform |
| CN202111199U (en) * | 2011-06-17 | 2012-01-11 | 北京汽车新能源汽车有限公司 | Thermal management device for power battery system of electric vehicle |
| CN202480875U (en) * | 2011-12-30 | 2012-10-10 | 长城汽车股份有限公司 | Automobile hydraulic control parking mechanism |
| CN103063426A (en) * | 2013-01-08 | 2013-04-24 | 徐州徐工液压件有限公司 | Pin-plug and pin-pull device testing table of single cylinder plug pin hydraulic cylinder |
| CN203128073U (en) * | 2013-03-19 | 2013-08-14 | 北京京城重工机械有限责任公司 | Mutual interlocking mechanism in single-cylinder plug pin telescoping mechanism |
-
2013
- 2013-10-31 CN CN201310532366.9A patent/CN103615419B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2240530Y (en) * | 1995-03-02 | 1996-11-20 | 中国船舶工业总公司第七研究院第七○四研究所 | Rotary arm positioning mechanism of inner liner disintegrate machine for metal-mixing trolley |
| DE10156598A1 (en) * | 2001-11-17 | 2003-05-28 | Still Gmbh | Mobile work machine with an electrically driven steering pump |
| CN201593183U (en) * | 2009-12-09 | 2010-09-29 | 王国治 | Hydraulic lifting device of drilling platform |
| CN202111199U (en) * | 2011-06-17 | 2012-01-11 | 北京汽车新能源汽车有限公司 | Thermal management device for power battery system of electric vehicle |
| CN202480875U (en) * | 2011-12-30 | 2012-10-10 | 长城汽车股份有限公司 | Automobile hydraulic control parking mechanism |
| CN103063426A (en) * | 2013-01-08 | 2013-04-24 | 徐州徐工液压件有限公司 | Pin-plug and pin-pull device testing table of single cylinder plug pin hydraulic cylinder |
| CN203128073U (en) * | 2013-03-19 | 2013-08-14 | 北京京城重工机械有限责任公司 | Mutual interlocking mechanism in single-cylinder plug pin telescoping mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103615419A (en) | 2014-03-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103615419B (en) | A kind of hydraulic bolt jacking system bolt device | |
| CN201442827U (en) | Ultra-thin hydraulic lifter hydraulic system | |
| CN101537984B (en) | Hoist motor closed type hydraulic system for preventing pipelines from bursting and control method thereof | |
| CN205689156U (en) | A kind of high-adaptability stress decentralized bidirectional hydraulic drilling jar | |
| CN203284135U (en) | Lockable scissor type mechanical lifting platform | |
| CN102923610A (en) | Hydraulic bolt lifting gear | |
| CN105298981A (en) | Safe and reliable derrick lifting multistage cylinder | |
| CN103591064B (en) | Supporting leg hydraulic control system and engineering vehicle | |
| CN105804038A (en) | Double-layer dynamic ring beam hydraulic plug pin type cylindrical pile leg continuous lifting device | |
| CN104454714B (en) | Hydraulic power control system for hydraulic plug type lifting system | |
| CN104316336B (en) | A kind of lowering or hoisting gear type approval test method and its realize system | |
| CN206187287U (en) | A anchor chain detent for mooring system | |
| CN105114379B (en) | Lifting platform and hydraulic system thereof | |
| CN203543914U (en) | Supporting leg control hydraulic system and engineering vehicle | |
| CN201461596U (en) | Hydrocylinder with locking device | |
| CN104727605A (en) | Stereo garage | |
| CN204661230U (en) | Four-column type lifting machine | |
| CN204982731U (en) | Shallow formula roadblock machine that buries | |
| CN201433066Y (en) | Pipeline crack prevention closed type hydraulic system of winding motor | |
| CN206770300U (en) | Double double-stage braking hoister hydraulic stations | |
| CN109578360A (en) | A kind of Novel diesel engine monorail crane auxiliary system hydraulic control valve | |
| CN205744651U (en) | Hot-metal bottle tipping vehicle hydraulic control system | |
| CN205241000U (en) | Safe energy -conserving single cylinder hydraulic pressure elevator system | |
| CN105672214A (en) | Hydraulic lifting dam | |
| CN205918671U (en) | Two board -like clapper die spotting press lift in -process hydraulic pressure protection return circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | 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 |