CN204626413U - Pattern foundation pit supporting structure power and timed unit - Google Patents
Pattern foundation pit supporting structure power and timed unit Download PDFInfo
- Publication number
- CN204626413U CN204626413U CN201520153163.3U CN201520153163U CN204626413U CN 204626413 U CN204626413 U CN 204626413U CN 201520153163 U CN201520153163 U CN 201520153163U CN 204626413 U CN204626413 U CN 204626413U
- Authority
- CN
- China
- Prior art keywords
- foundation pit
- hydraulic cylinder
- supporting structure
- structure power
- pattern foundation
- 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.)
- Withdrawn - After Issue
Links
Landscapes
- Actuator (AREA)
Abstract
The utility model provides a kind of pattern foundation pit supporting structure power and timed unit, comprise hydraulic cylinder, supporting seat, latch segment, push rod, crank, bracing frame, Compress Spring, locking cylinder and PLC control unit, described push rod is fixedly connected with piston rod one end of described hydraulic cylinder, described push rod and described latch segment there are some spaced card teeth and guide groove, described locking cylinder is moved by latch segment described in described crank handle turns, completes described hydraulic cylinder mechanical self-latching.The pattern foundation pit supporting structure power that the utility model provides and timed unit, the resource consumption that manual operation can be avoided to bring and hidden danger, ensured that security of foundation ditch construction carries out in an orderly manner further.
Description
Technical field
The utility model belongs to foundation pit construction field, particularly a kind of pattern foundation pit supporting structure power and timed unit.
Background technology
Along with the fast development of urbanization process, the construction in city also becomes more diversified with complicated, and the environment of construction also becomes increasingly complex, and required standard is also more and more higher.Nowadays; when carrying out ground construction, particularly in the process of deep pit digging, in order to protect the safety of foundation ditch self and periphery building structure; generally need to adopt some supporting and protection structure to carry out supporting to deep foundation ditch, such as steel bar concrete support, steel pipe support etc.Due to steel pipe support, to have speed fast, low cost and other advantages, it is increasingly used for deep foundation pit support, at some, extremely strict occasion being required to deformation control of foundation pit especially, as run the Deformation control etc. of the Soft Soil Foundation Pit engineering on subway limit, generally also needing according to designing requirement Shi Hanzhang, but along with the passing of engineering time, bracing members can produce stress relaxation, and the prestressing force on bracing members can reduce, and sometimes even disappears.Usual needs arrange a bracing members axle force control device between steel pipe support and enclosure wall, a normally jack, as hydraulic jack and oil cylinder, by this bracing members Shi Hanzhang of this jack pair, to prevent enclosure wall in Excavation Process because the loss of bracing members axle power causes foundation pit deformation to runaway.
Chinese patent literature CN101776106B discloses a kind of axial force of foundation pit steel support adaptive system real-time compensating cylinder system on October 17th, 2012, can report to the police after the axle power change of bracing members exceedes setting value, constructor the long-range axle power to bracing members can carry out control adjustment.But, when Long-distance Control adjusts, particularly when oil cylinder carries out " stretching " work, first piston bar advances and drives screw rod to advance, now, because locking nut is connected with screw flight, locking nut is followed screw rod and is advanced, thus corresponding gap can be produced at locking nut between connection spacer shell and dust cover, in order to eliminate the gap between locking nut and dust cover, on-the-spot operating personnel must descend Brace in Deep Footing Groove compensating cylinder position, manual turn locking nut, make itself and dust cover by jail, thus locked cylinder operating position.Once oil cylinder breaks down or oil supply loop generation oil leakage phenomenon, in oil cylinder, the pressure of oil can reduce suddenly, screw rod will fast fallback, because locking nut is near dust cover, screw rod rollback can be stoped, thus avoid steel pipe support the support of space enclosing structure was lost efficacy, ensure that the construction safety of deep foundation ditch.
Because in work progress, all the time all micro-strain can there is in foundation ditch, when deflection is accumulated to certain value, now, in hydraulic cylinder, the pressure of oil is also along with dropping to a certain limit value, in order to avoid foundation pit deformation is excessive, just need the overhang of adjustment hydraulic cylinder piston rod in time, so need people to remove turn locking nut continually.Usually, large deep foundation pit needs tens even hundreds of such steel pipe supports, so large workload intangibly can add the labour intensity of operating personnel, and due to artificial reason, inevitably omit certain root steel pipe support or certain locking nut turn work, thus some unsafe factors can be left to foundation pit construction; In addition, deep foundation pit construction environment is relatively more severe, is easy to operator safety accident occurs.
Therefore, a kind of self-locking device that can lock hydraulic cylinder works state is in time provided, can avoid artificial rotational lock nut cause manpower, financial resources a large amount of waste and some unsafe factors of bringing, the device that a kind of pattern foundation pit supporting structure of utility model power controls immediately is those skilled in the art's technical problems urgently to be resolved hurrily.
Utility model content
In order to be out of shape a wayward difficult problem when solving deep foundation ditch in geotechnical engineering (especially complex geologic conditions and environmentally sensitive area deep foundation ditch as along the line in city operations subway) excavation construction, a kind of pattern foundation pit supporting structure power real-time control system that the utility model provides and method, the duty of hydraulic cylinder can be locked in time, realize the real-time mechanical self-latching function of hydraulic cylinder, thus avoid manpower that manual operation causes, a large amount of waste of financial resources and some unsafe factors brought, not only reduce the use human cost of foundation ditch Light deformation hydraulic control cylinder, also effectively ensured the safety of work progress simultaneously.
In order to solve the problems of the technologies described above, the utility model adopts following technical scheme:
A kind of pattern foundation pit supporting structure power and timed unit, comprise hydraulic cylinder, supporting seat, push rod, two pieces of latch segments, two cranks, bracing frame and locking cylinder, described supporting seat is fixedly connected with described hydraulic cylinder by bolt, described supporting seat is sheathed on outside described push rod, two pieces of described latch segments to be positioned on described supporting seat and to be symmetricly set in outside described push rod, support frame as described above to be arranged at outside supporting seat and to be connected with described hydraulic cylinder bolt, two described cranks are sold respectively and are connected to the both sides of support frame as described above away from described hydraulic cylinder one end, one end of each described crank is all connected with latch segment pin described in, the other end of each described crank is connected with the two ends of described locked hydraulic cylinder respectively.
Optionally, also comprise a Compress Spring, described Compress Spring is arranged between two described cranks.
Optionally, pressure sensor and position sensor is provided with in described hydraulic cylinder.
Optionally, described latch segment clear width arranges some guide grooves, and on described push rod, interval arranges some annular snap teeth, and described guide groove and described card tooth engage each other.
Optionally, the thread form angle of described guide groove or described card tooth is 10 °-16 °.
Optionally, described locking cylinder two ends are all provided with connecting lug.
Optionally, also comprise PLC control unit, two two-position four-way solenoid valves and three-position four-way electromagnetic directional valve, wherein, two-position four-way solenoid valve described in one is arranged on the entering of described locking cylinder, oil return line, two-position four-way solenoid valve described in another is arranged on the entering of described hydraulic jack, oil return line, described three-position four-way electromagnetic directional valve is arranged on total oil-feed oil circuit and total oil return circuit, and described PLC control unit is connected with two described two-position four-way solenoid valves and described three-position four-way electromagnetic directional valve signal respectively.
In addition, the utility model also provides a kind of pattern foundation pit supporting structure power and period control method, comprises the steps:
Step 1: pattern foundation pit supporting structure power and timed unit described in one are provided;
Step 2: described pattern foundation pit supporting structure power real-time control system is arranged between bracing of foundation pit wall that steel pipe support and required Light deformation control, described push rod is withstood on the pre-embedded steel slab of described bracing of foundation pit wall;
Step 3: the axle power applying designing requirement to described steel pipe support, and axle power early warning lower limit is set;
Step 4: monitor the change of axle power:
When axle power reaches described axle power early warning lower limit, described locking cylinder performs retracting action, is moved, open the mechanical self-latching of described hydraulic cylinder by latch segment described in described crank handle turns, and described hydraulic cylinder performs oiling instruction, described hydraulic cylinder pressurization;
When axle power is restored to designing requirement axle force value, described locking cylinder performs extend action, is moved by latch segment described in described crank handle turns, and the mechanical self-latching of described hydraulic cylinder closes, and locks described Position of Hydraulic Cylinder;
Step 5: foundation pit construction completes, removes described pattern foundation pit supporting structure power and timed unit.
In terms of existing technologies, pattern foundation pit supporting structure power provided by the utility model and timed unit and method, at least have following useful technique effect:
1, significantly reduce the human cost of foundation pit construction and the labour intensity of workman: described locking cylinder stretch out retracting action can drive described latch segment close open, realize opening described hydraulic cylinder works state locking, thus avoid need more operator remove manual operation locking nut, significantly reduce human cost, also greatly reduce the labour intensity of operator simultaneously.
2, the safety of foundation pit construction has effectively been ensured: described pattern foundation pit supporting structure power and timed unit can lock the duty of hydraulic cylinder in real time, avoid and serve hidden danger because of the carelessness of people to foundation pit construction band, also ensured the personal safety of operator under foundation pit construction comparatively adverse circumstances simultaneously.
Accompanying drawing explanation
Fig. 1 is the pattern foundation pit supporting structure power of the utility model one embodiment and the application scenario schematic diagram of timed unit;
Fig. 2 is pattern foundation pit supporting structure power and the timed unit structural representation of the utility model one embodiment;
Fig. 3 is the top view of Fig. 2;
Fig. 4 is the pattern foundation pit supporting structure power of the utility model one embodiment and the flow chart of period control method.
Fig. 5 is the pattern foundation pit supporting structure power of the utility model one embodiment and the hydraulic schematic diagram of timed unit
Detailed description of the invention
Below in conjunction with accompanying drawing and instantiation, the pattern foundation pit supporting structure power that the utility model proposes and timed unit and method are described in further detail.According to the following describes and claims, advantage of the present utility model and feature will be clearer.It should be noted that, accompanying drawing all adopts the form that simplifies very much and all uses non-ratio accurately, only in order to object that is convenient, aid illustration the utility model embodiment lucidly.
With reference to figure 1, present embodiment discloses a kind of pattern foundation pit supporting structure power and timed unit 100, be arranged at one end of steel pipe support 200, for supporting foundation pit wall 300, in the present embodiment, described enclosure wall 300 is close to and runs subway line 400.
Composition graphs 2 to Fig. 3, the pattern foundation pit supporting structure power of the utility model one embodiment and timed unit 100, comprise hydraulic cylinder 1, supporting seat 2, two pieces of latch segments 3, push rod 4, two cranks 5, bracing frame 6 and locking cylinders 8.Push rod 4 is fixedly connected with the one end away from piston of piston rod in hydraulic cylinder 1, supporting seat 2 is set in the outside of push rod 4, supporting seat 2 is fixedly connected with by the cylinder body of bolt with hydraulic cylinder 1, push rod 4 with piston rod in hydraulic cylinder 1 stretch out be retracted in supporting seat 2 and do rectilinear motion, realize the Deformation control to supporting foundation pit wall 300.Two pieces of latch segments 3 are positioned on supporting seat 2, and two pieces of latch segments 3 are symmetricly set on the outside of push rod 4, and two pieces of latch segments 3 are semicircular ring structure.Bracing frame 6 is fastened on the outside of supporting seat 2, bracing frame 6 is welding steel structure, and bracing frame 6 one end is base plate, and the base plate in bracing frame 6 is fixedly connected with cylinder body in hydraulic cylinder 1 by bolt, the other end of bracing frame 6 is a crossbeam, and the two ends of crossbeam are symmetrical arranged two steady pins.Two cranks 5 are for being symmetrical arranged, two cranks 5 are hinged with the steady pin in bracing frame 6 respectively, each crank 5 can sell rotation in bracing frame 6, each crank 5 one end is hinged by threaded with a latch segment 3 respectively, the other end and the locking cylinder 8 of each crank 5 are hinged, and Compress Spring 7 is arranged on the one end by locking cylinder 8 between two cranks 5.In locking cylinder 8 piston rod stretch out be retracted through crank 5 drive latch segment 3 relative to oppositely move, thus realize latch segment 3 lock unclamp push rod 4, Compress Spring 7 is in compressive state all the time, thus make latch segment 3 be in the trend that will lock push rod 4 all the time, still can realize latch segment 3 when locking cylinder 8 breaks down and lock push rod 4.
Continue composition graphs 2, Fig. 3 and Fig. 5, pressure sensor 19 and position sensor 20 is also provided with in hydraulic cylinder 1, pressure sensor 19 can monitor the pressure size in hydraulic cylinder 1, realize the monitoring to steel pipe support 200 axle power, position sensor 20 can monitor the position of piston rod in hydraulic cylinder 1, further the duty of monitoring hydraulic cylinder 1.
Continue composition graphs 2 and Fig. 3, all some guide grooves and Ka Ya are set at interval in the outside of the inner side of latch segment 3 and push rod 4, latch segment 3 moves at the drive Xia Xiang center of crank 5, in latch segment 3, the tooth of guide groove extend in the groove of card tooth in push rod 4, form several intermeshing guide groove card teeth, the support reaction of bracing of foundation pit wall 300 pairs of push rods 4 passes to latch segment 3 by several intermeshing guide grooves and Ka Ya, it is passed to supporting seat 2 by latch segment 3 again, finally pass to hydraulic cylinder 1, thus realize the position locking push rod 4 when hydraulic cylinder 1 breaks down.Preferably the thread form angle of card tooth on latch segment 3 upper rail and push rod 4 is designed to 10 °-16 °, utilizes inclined-plane self-lock mechanism, latch segment 3 just can be made can not to skid off because of the axle power suffered by push rod 4 not having the situation of other external force.
Continue composition graphs 2 and Fig. 3, locking cylinder 8 two ends are all provided with connecting lug, the connecting lug at locking cylinder 8 two ends is connected with crank 5 by pin, can to ensure in locking cylinder 8 piston rod stretch out retract action time, can ensure that two cranks 5 are in symmetry status all the time.
With reference to figure 5, and incorporated by reference to Fig. 1-Fig. 3, pattern foundation pit supporting structure power and timed unit 100 also comprise PLC control unit 17 and two two-position four-way solenoid valves 12 and a three-position four-way electromagnetic directional valve 14, wherein, a two-position four-way solenoid valve 12 is arranged at entering of locking cylinder 8, on oil return line, another two-position four-way solenoid valve 12 is arranged at entering of hydraulic cylinder 1, on oil return line, three-position four-way electromagnetic directional valve 14 is arranged on total oil-feed oil circuit and total oil return circuit, PLC control unit 17 is connected with two two-position four-way solenoid valves 12 and three-position four-way electromagnetic directional valve 14 signal respectively.PLC control unit 17 sends work order respectively to two two-position four-way solenoid valves 12 and a three-position four-way electromagnetic directional valve 14, can realize the break-make of the entering of locking cylinder 8 and hydraulic cylinder 1, oil return line and break-make sequencing, the control in the time interval, thus control the opening and closing of latch segment 3 and the telescopic moving of push rod 4.In addition, pattern foundation pit supporting structure power real-time control system 100 also comprises fuel tank 21, hydro-power pump 15 and proportional pressure control valve 16 etc.Total oil-feed oil circuit is connected with fuel tank 21 respectively with total oil return circuit.One end near fuel tank 21 on total oil-feed oil circuit is provided with hydro-power pump 15, one end near fuel tank 21 on total oil return circuit is provided with proportional pressure control valve 16, and proportional pressure control valve 16 is the proportional pressure control valve of band feedback, according to the pressure feedback of load, setup parameter, thus the constant pressure of the system of guarantee.In proportional pressure control valve 16, hydraulic cylinder 1, pressure sensor 19 and displacement transducer 20 are connected with PLC control unit 17 signal respectively and pressure information and positional information are fed back to PLC control unit 17.
With reference to figure 4, and incorporated by reference to Fig. 1-Fig. 3 and Fig. 5, the pattern foundation pit supporting structure power that the utility model provides and period control method are described, comprise the steps:
Step 1: pattern foundation pit supporting structure power and timed unit 100 are provided.
Step 2: pattern foundation pit supporting structure power and timed unit 100 are arranged between bracing of foundation pit wall 300 that steel pipe support 200 and required Light deformation control, push rod 4 withstands on the pre-embedded steel slab of described bracing of foundation pit wall 300.
Step 3: the axle power applying designing requirement to steel pipe support 200, and axle power early warning lower limit is set.
Apply the axle power of designing requirement to steel pipe support 200 by pressure sensor 19 in hydraulic cylinder 1 and PLC control unit 17, and axle power early warning lower limit is set.
Step 4: monitor the change of axle power;
When axle power reaches axle power early warning lower limit, in hydraulic cylinder 1, axle power lower limit early warning signal is fed back to PLC control unit 17 by pressure sensor 19, the two-position four-way solenoid valve 12 of PLC control unit 17 to being arranged on that locking cylinder 8 enters, on oil return line sends opens mechanical self-latching instruction, two-position four-way solenoid valve 12 performs and opens mechanical self-latching instruction, locking cylinder 8 piston rod bounces back, two crank 5 synchronous axial system, drive two latch segment 3 oppositely movements, open the mechanical self-latching of hydraulic cylinder 1; After PLC control unit 17 sends and opens mechanical self-latching instruction certain hour interval, two-position four-way solenoid valve 12 immediately to being arranged on that hydraulic cylinder 1 enters, on oil return line sends the instruction of injection pressure oil, two-position four-way solenoid valve 12 performs the instruction of injection pressure oil, in hydraulic cylinder 1, piston rod stretches out under the promotion of pressure oil, the pressure change of pressure oil in hydraulic cylinder monitored by pressure sensor 19, and position sensor 20 detects the piston rod change in displacement of hydraulic cylinder 1 simultaneously.
When change in displacement is draw-in groove pitch integral multiple and pressure reaches designing requirement value, the two-position four-way solenoid valve 12 of PLC control unit 17 to being arranged on that hydraulic cylinder 1 enters, on oil return line sends and stops oiling instruction, two-position four-way solenoid valve 12 performs and stops oiling instruction, stops to hydraulic cylinder 1 oiling; After PLC control unit 17 sends and stops oiling signal instruction certain hour interval, the two-position four-way solenoid valve 12 of PLC control unit 17 to being arranged on that locking cylinder 8 enters, on oil return line, send closed mechanical self-latching instruction, two-position four-way solenoid valve 12 performs closed mechanical self-latching instruction, locking cylinder 8 piston stretches out, and drive latch segment 3 to move in opposite directions, latch segment 3 and push rod 4 upper rail and Ka Ya engage each other, locking push rod 4 position, completes hydraulic cylinder 1 mechanical self-latching.
Step 5: foundation pit construction completes, removes pattern foundation pit supporting structure power and timed unit 100.
In sum, the pattern foundation pit supporting structure power that the utility model provides and timed unit and method, the duty of described hydraulic cylinder can be locked in real time, the waste of a large amount of manpower financial capacities needing manual operation to cause can be avoided, reduce the labour intensity of operator further; Meanwhile, some hidden dangers that some bring because of human negligence can be eliminated, ensure that security of foundation ditch construction carries out in an orderly manner further.
Foregoing description is only the description to the utility model preferred embodiment; any restriction not to the utility model scope; any change that the those of ordinary skill in the utility model field does according to above-mentioned disclosure, modification, all belong to the protection domain of claims.
Claims (7)
1. a pattern foundation pit supporting structure power and timed unit, it is characterized in that, comprise hydraulic cylinder, supporting seat, push rod, two pieces of latch segments, two cranks, bracing frame and locking cylinder, described supporting seat is fixedly connected with described hydraulic cylinder by bolt, described supporting seat is sheathed on outside described push rod, two pieces of described latch segments to be positioned on described supporting seat and to be symmetricly set in outside described push rod, support frame as described above to be arranged at outside supporting seat and to be connected with described hydraulic cylinder bolt, two described cranks are sold respectively and are connected to the both sides of support frame as described above away from described hydraulic cylinder one end, one end of each described crank is all connected with latch segment pin described in, the other end of each described crank is connected with the two ends of described locked hydraulic cylinder respectively.
2. pattern foundation pit supporting structure power according to claim 1 and timed unit, is characterized in that, also comprises a Compress Spring, and described Compress Spring is arranged between two described cranks.
3. pattern foundation pit supporting structure power according to claim 1 and timed unit, is characterized in that, is provided with pressure sensor and position sensor in described hydraulic cylinder.
4., according to described pattern foundation pit supporting structure power arbitrary in claim 1-3 and timed unit, it is characterized in that, described latch segment clear width arranges some guide grooves, and on described push rod, interval arranges some annular snap teeth, and described guide groove and described card tooth engage each other.
5. pattern foundation pit supporting structure power according to claim 4 and timed unit, is characterized in that, the thread form angle of described guide groove or described card tooth is 10 °-16 °.
6. pattern foundation pit supporting structure power according to claim 5 and timed unit, is characterized in that, described locking cylinder two ends are all provided with connecting lug.
7. pattern foundation pit supporting structure power according to claim 5 and timed unit, it is characterized in that, also comprise PLC control unit, two two-position four-way solenoid valves and three-position four-way electromagnetic directional valve, wherein, two-position four-way solenoid valve described in one is arranged at described locking cylinder and enters, on oil return line, two-position four-way solenoid valve described in another is arranged at described hydraulic jack and enters, on oil return line, described three-position four-way electromagnetic directional valve is arranged on total oil-feed oil circuit and total oil return circuit, described PLC control unit is connected with two described two-position four-way solenoid valves and described three-position four-way electromagnetic directional valve signal respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520153163.3U CN204626413U (en) | 2015-03-18 | 2015-03-18 | Pattern foundation pit supporting structure power and timed unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520153163.3U CN204626413U (en) | 2015-03-18 | 2015-03-18 | Pattern foundation pit supporting structure power and timed unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204626413U true CN204626413U (en) | 2015-09-09 |
Family
ID=54045457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520153163.3U Withdrawn - After Issue CN204626413U (en) | 2015-03-18 | 2015-03-18 | Pattern foundation pit supporting structure power and timed unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204626413U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104762977A (en) * | 2015-03-18 | 2015-07-08 | 上海建工集团股份有限公司 | Foundation pit support force real-time control system and method |
| CN110749305A (en) * | 2019-11-15 | 2020-02-04 | 亳州职业技术学院 | Building engineering measurement system based on segmentation and clustering |
-
2015
- 2015-03-18 CN CN201520153163.3U patent/CN204626413U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104762977A (en) * | 2015-03-18 | 2015-07-08 | 上海建工集团股份有限公司 | Foundation pit support force real-time control system and method |
| CN110749305A (en) * | 2019-11-15 | 2020-02-04 | 亳州职业技术学院 | Building engineering measurement system based on segmentation and clustering |
| CN110749305B (en) * | 2019-11-15 | 2021-07-06 | 亳州职业技术学院 | Building engineering measurement system based on segmentation and clustering |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104762977A (en) | Foundation pit support force real-time control system and method | |
| CN104762976A (en) | Foundation pit support axial force following control system and method | |
| CN108252980B (en) | Foundation pit deformation fine control device and control method | |
| CN204626413U (en) | Pattern foundation pit supporting structure power and timed unit | |
| CN106555787B (en) | A kind of wedge structure hydraulic pressure support displacement control system and its application method | |
| CN104233951B (en) | A kind of multi-functional viscous damper and attaching method thereof | |
| CN204626414U (en) | Foundation ditch axial force of the supports follow-up control device | |
| CN101318538A (en) | Hydraulic control system and apparatus for split positioning of ship body | |
| CN106437178A (en) | Integral lifting construction method and integral lifting construction device of veranda of multi-layer steel structure | |
| CN108951658B (en) | Deep foundation pit section steel supporting system based on active control | |
| CN202688916U (en) | Lifting column type vehicle intercepting device | |
| CN105155418B (en) | A kind of construction method of bridge translation | |
| CN202298466U (en) | Synchronous jacking control device | |
| CN206268173U (en) | A kind of wedge structure hydraulic pressure support displacement control system | |
| CN106006386A (en) | Control method for hydraulic lifting equipment | |
| CN204101281U (en) | A kind of test unit of hoist crane | |
| CN202643036U (en) | Normally closed hydraulic falling protector | |
| CN201538657U (en) | Mechanical locking device for engineering machine supporting leg | |
| CN205654123U (en) | Building system of underpining | |
| CN205259161U (en) | Platform cantilever beam is prevented toppling and is removed and real -time locking device | |
| CN207406302U (en) | A kind of device of allowing pressurized maintenance christmas tree valve | |
| CN203420680U (en) | Balance adjusting booster for pumping unit | |
| CN215053035U (en) | Novel intelligent servo force-protecting box equipment supported by profile steel | |
| CN203834504U (en) | Structure of basement reverse construction method tower crane foundation | |
| CN203876274U (en) | Anti-looseness and anti-skidding device for flanged connection of medium and large cylinders |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150909 Effective date of abandoning: 20160824 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |