CN114477001A - Multi-point variable-frequency alternative synchronous jacking hydraulic control system with suspension compensation and method - Google Patents
Multi-point variable-frequency alternative synchronous jacking hydraulic control system with suspension compensation and method Download PDFInfo
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- CN114477001A CN114477001A CN202111624011.3A CN202111624011A CN114477001A CN 114477001 A CN114477001 A CN 114477001A CN 202111624011 A CN202111624011 A CN 202111624011A CN 114477001 A CN114477001 A CN 114477001A
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000006073 displacement reaction Methods 0.000 claims description 61
- 238000006243 chemical reaction Methods 0.000 claims description 14
- 239000010720 hydraulic oil Substances 0.000 claims description 11
- 238000005339 levitation Methods 0.000 claims 8
- 238000010276 construction Methods 0.000 abstract description 19
- 239000003921 oil Substances 0.000 description 24
- 230000001276 controlling effect Effects 0.000 description 11
- 230000008569 process Effects 0.000 description 11
- 230000008859 change Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000005303 weighing Methods 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/46—Combinations of several jacks with means for interrelating lifting or lowering movements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
- B66F3/25—Constructional features
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
- B66F3/25—Constructional features
- B66F3/42—Constructional features with self-contained pumps, e.g. actuated by hand
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/161—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load
- F15B11/167—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load using pilot pressure to sense the demand
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/20—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors controlling several interacting or sequentially-operating members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/22—Synchronisation of the movement of two or more servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
- F15B13/07—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors in distinct sequence
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/505—Pressure control characterised by the type of pressure control means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/78—Control of multiple output members
- F15B2211/782—Concurrent control, e.g. synchronisation of two or more actuators
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
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- Structural Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention relates to a multi-point variable frequency alternative synchronous jacking hydraulic control system with suspension compensation and a method thereof, which are used for controlling a plurality of groups of jacks to alternatively and synchronously jack, and comprise the following steps: the jacking power pump set is arranged corresponding to each jack set; the alternative control valve group is connected between the corresponding jacking power pump group and the jack; the reversing valve group is connected between the alternating control valve group and the corresponding jack; and the suspension compensation pump set is connected with each jack. The invention provides driving force for each group of jacks through the jacking power pump group, can meet the requirements of alternative synchronous jacking operation of each group of jacks, and can carry out real-time dynamic pressure compensation on the jacks through the suspension compensation pump group when the jacks are lifted to the proper position and suspended with loads, thereby ensuring that the pressure compensation is timely provided for the jacks with pressure loss, providing the safety control of online pressure compensation for the jacks with loads and hovering, and improving the safety of alternative synchronous jacking construction.
Description
Technical Field
The invention relates to the technical field of hydraulic mechanical equipment, in particular to a multi-point variable-frequency alternative synchronous jacking hydraulic control system with suspension compensation and a method thereof.
Background
When large-scale jacking of a large building is carried out on a large scale, the large building is jacked by utilizing the cushion blocks step by step, 100-200 mm is jacked each time, then the large building is dropped on the fixed support cushion, the jacking jack is withdrawn, the cushion blocks below the jack are added, the jack is started again, and jacking of the second step is carried out until the jacking height meeting the design requirement is reached. Because the building is placed on the fixed support pad for many times, the fixed support pad has a pressing gap, and the base line of the building cannot be maintained at high precision, the construction process has potential overstrain hazards, and the structural safety cannot be effectively ensured.
The existing alternate support pad continuous jacking construction method effectively solves the problems, and the alternate support pad continuous jacking construction method utilizes redundancy of increasing jacking force, does not drop a building, lifts and withdraws jacking jacks in groups, synchronously supports the pad and enables jacking construction to be continuously carried out. The process of falling back to the fixed support cushion is avoided, so that the whole jacking process is ensured, the stress of the building structure is uniform, and the construction is smooth and efficient.
However, in the current construction process, a group of jacks are supported in a jacking pressure maintaining mode, and a group of jacks are supported in a falling back support pad, so that the phenomenon that other groups of jacks are overloaded due to pressure loss and pressure loss of the group of jacks caused by pressure loss of the group of jacks and the condition that a hydraulic pressure maintaining valve element leaks in a trace manner and a sealing ring inside the jack leaks in a trace manner appears, and unpredictable huge risks are brought to jacking construction of a building. The key equipment of the existing alternate support pad continuous jacking construction method alternately jacks up a hydraulic pump station, so that the potential safety hazard of jacking construction existing in the prior art cannot be solved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a multi-point variable-frequency alternative synchronous jacking hydraulic control system with suspension compensation and a method thereof, and solves the problem that jacking pressure-maintaining support jacks in the existing alternative support pad continuous jacking construction are subjected to pressure loss, so that other sets of jacks are overloaded, and further unpredictable huge risks are brought to buildings.
The technical scheme for realizing the purpose is as follows:
the invention provides a multipoint frequency conversion alternative synchronous jacking hydraulic control system with suspension compensation, which is used for controlling a plurality of groups of jacks to alternatively and synchronously jack, and is characterized in that the hydraulic control system comprises:
the jacking power pump set is arranged corresponding to each jack set;
the alternative control valve group is connected between the corresponding jacking power pump group and the jack;
the reversing valve group is connected between the alternating control valve group and the corresponding jack; and
and the suspension compensation pump set is connected with each jack.
The hydraulic control of the invention provides driving force for each group of jacks through the jacking power pump group, can meet the requirements of alternative synchronous jacking operation of each group of jacks, and can carry out real-time dynamic pressure compensation on the jacks through the suspension compensation pump group when the jacks are lifted to the proper position and suspended with loads, thereby ensuring that the pressure compensation is provided for the jacks with pressure loss in time, providing the safety control of online pressure compensation for the jacks suspended with loads, and improving the safety of alternative synchronous jacking construction. And the suspension compensation pump group also provides a hydraulic oil source for the jack which falls back for another jack in the jacking process of one jack, so that the jacking jacks and the falling-back jacks in the group of jacks are synchronously carried out, and the safety and the construction efficiency of alternative jacking can be improved.
The multi-point frequency conversion alternate synchronous jacking hydraulic control system with the suspension compensation is further improved in that the system further comprises a proportional control valve connected between the suspension compensation pump set and the corresponding jack.
The multi-point frequency conversion alternate synchronous jacking hydraulic control system with the suspension compensation is further improved in that the proportional control valve is connected between the reversing valve group of each group of jacks and the suspension compensation pump group.
The multi-point frequency conversion alternate synchronous jacking hydraulic control system with the suspension compensation is further improved in that the system further comprises a displacement sensor which is arranged corresponding to each group of jacks and is used for detecting the jacking displacement of the corresponding jack in real time.
The multi-point frequency conversion alternate synchronous jacking hydraulic control system with the suspension compensation is further improved in that the system also comprises pressure sensors arranged on the jacks and used for detecting the real-time loaded jacking force of the corresponding jack.
The invention also provides a multi-point frequency conversion alternative synchronous jacking hydraulic control method with suspension compensation, which is used for controlling a plurality of groups of jacks to alternatively and synchronously jack, and comprises the following steps:
providing a plurality of jacking power pump sets, correspondingly connecting the jacking power pump sets with each set of jacks, and providing driving force for each set of jacks through the jacking power pump sets;
providing an alternate control valve group, connecting the alternate control valve group between the corresponding jacking power pump group and the corresponding jack, and controlling each group of jacks to alternatively jack through the alternate control valve group;
providing a reversing valve bank, connecting the reversing valve bank between the alternate control valve bank and the corresponding jack, and controlling the corresponding jack to lift or fall back through the reversing valve bank; and
and providing a suspension compensation pump set, connecting the suspension compensation pump set with each jack, and carrying out real-time dynamic pressure compensation on the jack through the suspension compensation pump set when the corresponding jack is subjected to pressure loss.
The invention further improves the multipoint frequency conversion alternative synchronous jacking hydraulic control method with suspension compensation, which also comprises the following steps:
providing a proportional control valve, and connecting the proportional control valve between a reversing valve group of each group of jacks and the suspension compensation pump group;
when the jacks of each group are alternatively jacked, the suspension compensation pump group is connected with the jack which falls back through the proportional control valve, and a hydraulic oil source is provided for the jack which falls back.
The invention further improves the multipoint frequency conversion alternative synchronous jacking hydraulic control method with suspension compensation, which also comprises the following steps:
the jacking displacement of each group of jacks is collected in real time;
when the jacking displacement changes, the magnitude of the jacking displacement variation and the set displacement value is compared and judged, and if the jacking displacement variation is larger than or equal to the set displacement value, real-time dynamic pressure compensation is carried out on the corresponding jack through the suspension compensation pump set.
The invention further improves the multipoint frequency conversion alternative synchronous jacking hydraulic control method with suspension compensation, which also comprises the following steps:
acquiring the lifting force of the loaded jack of each jack in real time;
calculating the sharing load of each jack according to the bearing pressure of the jacked object;
comparing the load sharing with the loaded jacking force to obtain a pressure difference value;
and driving the suspension compensation pump set to perform pressure compensation in real time according to the obtained pressure difference.
The invention further improves the multipoint frequency conversion alternative synchronous jacking hydraulic control method with suspension compensation, which also comprises the following steps:
and providing a balanced load-equalizing pressure-maintaining valve group, connecting the balanced load-equalizing pressure-maintaining valve group between the reversing valve group and the corresponding jack, and controlling the corresponding jack to be in a pressure-maintaining state after the jacking is finished through the balanced load-equalizing pressure-maintaining valve group.
Drawings
FIG. 1 is a system diagram of a multi-point variable frequency alternative synchronous jacking hydraulic control system for suspension compensation according to the present invention.
Fig. 2 is a schematic structural diagram of a group of jacks in a suspension compensation multi-point variable frequency alternative synchronous jacking hydraulic control system, wherein one jack is in a jacking state and the other jack is in a falling state.
Fig. 3 is a schematic structural diagram of a group of jacks in the suspension compensation multi-point variable frequency alternative synchronous jacking hydraulic control system of the invention connected with a controller.
Fig. 4 is an enlarged structural schematic diagram of a balanced load-equalizing pressure-maintaining valve set connected with a corresponding jack in the suspension-compensated multi-point variable-frequency alternative synchronous jacking hydraulic control system.
FIG. 5 is a flow chart of a multi-point variable frequency alternative synchronous jacking hydraulic control method with suspension compensation according to the present invention.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
Referring to fig. 1, the invention provides a multi-point variable frequency alternative synchronous jacking hydraulic control system with suspension compensation and a method thereof, which are used for satisfying the continuous jacking construction of an alternative support pad and solving the pressure loss potential safety hazard caused by leakage of a hydraulic pressure maintaining valve or internal leakage generated by seal abrasion of a hydraulic jack due to hydraulic oil pollution in the jacking construction process. After a jack is jacked to a proper position and hovers with load, the safety control of online pressure compensation is provided for the jack hovering with load through the suspension compensation pump set, and the phenomenon that the jack loses pressure and then causes overload to other jacks is avoided. This suspension compensation pump package still is used for providing the hydraulic oil source for the jack that falls back, realizes the receipts jar control of the jack that falls back, lets the jack that falls back actuate with the jack of jacking in step, improves the speed that the jack falls back, and then can improve the efficiency of jacking in turn, has both satisfied safe jacking in turn, has great improvement the efficiency of construction. The following describes the multi-point variable frequency alternative synchronous jacking hydraulic control system with suspension compensation and the method thereof with reference to the accompanying drawings.
Referring to fig. 1, a system diagram of the multi-point variable frequency alternative synchronous jacking hydraulic control system for suspension compensation of the invention is shown. The multi-point frequency conversion alternative synchronous jacking hydraulic control system with suspension compensation of the invention is explained with reference to fig. 1.
As shown in fig. 1, the multi-point variable frequency alternative synchronous jacking hydraulic control system with suspension compensation of the present invention includes a jacking power pump unit 21, an alternative control valve unit 22, a reversing valve unit 23, and a suspension compensation pump unit 24, and is used for controlling a plurality of sets of jacks to alternatively and synchronously jack, wherein one set of jacks includes at least two jacks, one jack is used for jacking and hovering, the other jack falls back to support a pad, and then alternately jacks and falls back, so that the alternative synchronous jacking is realized, and the object 10 can be continuously jacked up. In the example shown in fig. 1, four sets of jacks are shown, wherein the jack a1 and the jack a2 form a set of jacks, the jack B1 and the jack B2 form a set of jacks, the jack C1 and the jack C2 form a set of jacks, the jack D1 and the jack D2 form a set of jacks, the jacks a2, B2, C2 and D2 perform falling back support pads while the jacks a1, B1, C1 and D1 are lifted, the jacks a1, B1, C1 and D1 are suspended after being lifted to the top of the object 10, and the jacks a1, B1, C1 and D1 fall back synchronously after the jacks a2, B2, C2 and D2 are lifted to the top of the object 10. The hydraulic control system of the invention can be applied to the alternate and synchronous jacking operation of n groups of jacks, wherein n is a positive integer, and the number of the jacks depends on the size of the object 10.
The number of the jacking power pump sets 21 in the hydraulic control system is consistent with the number of the sets of the jacks, and the jacking power pump sets 21 are arranged corresponding to the jacks of each set and used for providing driving force for the jacks of each set; the alternate control valve group 22 is connected between the corresponding jacking power pump group 21 and the jack, and the alternate control valve group 22 is used for controlling and selecting the corresponding jack to carry out alternate jacking so as to meet the requirement of alternate support pad continuous jacking construction; the reversing valve group 23 is connected between the alternate control valve group 22 and the corresponding jack, and the reversing valve group 23 is used for controlling the corresponding jack to jack or fall back, so that the moving direction of the jack is controlled. Preferably, the number of the alternate control valve sets 22 and the reversing valve sets 23 is also consistent with the number of the sets of the jacks, and the alternate control valve sets and the reversing valve sets are arranged corresponding to the sets of the jacks. The suspension compensation pump unit 24 is connected with each jack, the suspension compensation pump unit 24 is used for providing dynamic pressure compensation for the jack after the jack is jacked and suspended, if no pressure is generated after the jack is jacked and suspended, the suspension compensation pump unit 24 can provide pressure compensation for the jack in time, the safety of jacking construction can be ensured, and the problem of potential safety hazard of no pressure caused by leakage of pressure maintaining valves or leakage generated by abrasion of sealing rings after the jack is jacked and suspended can be effectively solved.
In one embodiment of the invention, the system of the invention further comprises a proportional control valve 25 connected between the suspension compensation pump unit 24 and the corresponding jack. The communication between the suspension compensation pump unit 24 and the corresponding jack can be controlled by the proportional control valve 25, and when the corresponding jack needs oil pressure compensation, the oil pressure compensation can be realized by opening the corresponding proportional control valve 25.
Specifically, the number of the proportional control valves 25 is the same as the number of the jacks, and the proportional control valves 25 are connected with the corresponding jacks through pipelines.
Further, the proportional control valve 25 is connected between the reversing valve group 23 of each group of jacks and the suspension compensation pump group 24, the reversing valve group 23 can control jacking or falling of the jacks, the proportional control valve 25 is connected with the reversing valve group 23, the suspension compensation pump group 24 can provide safe control of online compensation pressure for the jacks hovering in a jacking mode, a hydraulic oil source can be provided for another jack when one jack rises, the jacks can be synchronously retracted through the reversing valve group to be electrified and reversed, safe alternate jacking is met, and construction efficiency is greatly improved. Specifically, as shown in fig. 2, when the jack a1 is lifted upwards, the jack a2 is lowered downwards, the valve on the right side is opened by the reversing valve corresponding to the jack a1, so that the lifting power pump unit 21 supplies oil to the lower oil pipe 11 of the jack a1, and the jack a1 is driven to lift upwards, and synchronously, the valve on the left side is opened by the reversing valve corresponding to the jack a2, and the proportional control valve 25 is also opened, so that the suspension compensation pump unit 24 supplies oil to the upper oil pipe 12 of the jack a2, the jack a2 is driven to fall downwards, the cylinder retracting speed of the jack a2 is increased, the upper oil pipe 12 of the jack a2 supplies oil to the jack a2, the jack a2 is driven to retract downwards, and the hydraulic oil flows back to the oil tank through the lower oil pipe of the jack a 2. So, no matter the jack rises or descends and all becomes the oil feed speed governing, can improve its security.
In an embodiment of the present invention, as shown in fig. 1, the hydraulic control system of the present invention further includes a displacement sensor 26 disposed corresponding to each set of jacks, and the displacement sensor 26 detects the jacking displacement of the corresponding jack in real time. Preferably, the displacement sensor 26 is installed on the lower surface of the object 10 and is disposed close to the jack, and the distance from the lower surface of the object 10 to the ground (or other bearing surface, such as a reaction foundation) can be detected in real time by the displacement sensor 26, that is, the jacking displacement of the jack. The displacement sensor 26 may also be mounted on the ground (or other bearing surface, such as a counterforce foundation) for its distance from the lower surface of the test object 10, i.e. the jacking displacement of the jack.
In a preferred embodiment, the jacking displacement detected by the displacement sensor 26 in real time is used as feedback to detect whether the jack is jacked in place, and when the jacking power pump unit 21 provides driving force for the jack, the jack jacking can be controlled by controlling the stroke of the jack.
In another preferred embodiment, the jacking displacement detected by the displacement sensor 26 in real time can be used to detect the pressure loss of the jack suspended by jacking, and when the jack is subjected to pressure loss, the jacking displacement detected by the displacement sensor will generate a negative change, and at this time, the pressure compensation can be provided for the jack by the suspension compensation pump unit 24.
In one embodiment of the present invention, as shown in fig. 1, the hydraulic control system of the present invention further includes a pressure sensor 27 mounted on each jack for detecting the real-time on-load jacking force of the corresponding jack.
In a preferred embodiment, the real-time loaded jacking force of the jack is detected in real time through the pressure sensor 27, and in the jacking process, the real-time loaded jacking force is used as feedback to control the jacking power pump unit to provide oil pressure for driving the jack, so that oil supply control in the jacking process of the jack is realized.
In another preferred embodiment, when the jack is in the jacking and hovering state, the real-time loaded jacking force of the jack is detected in real time, the real-time loaded jacking force is compared with the weighing pressure of the object, and the suspension compensation pump set is controlled in real time to perform pressure compensation according to the obtained pressure difference.
In an embodiment of the present invention, as shown in fig. 1, the hydraulic control system of the present invention further includes a balanced load-equalizing pressure-maintaining valve set 28 corresponding to each set of jacks, and the balanced load-equalizing pressure-maintaining valve set 28 is connected between the reversing valve set 23 and the corresponding jack.
Further, as shown in fig. 4, the balanced load-sharing pressure-maintaining valve set 28 includes a check valve 281 and a non-leakage electromagnetic ball valve 282 installed on the oil return line of the jack, and a proportional hydraulic control regulating valve 283 and a safety valve 284 installed between the oil supply line and the oil return line of the jack. Preferably, the relief valve 284 has one end connected to the oil return line and the other end connected between the oil supply line and the proportional pilot control valve 283.
In a preferred embodiment, the check valve 281, the proportional pilot control valve 283 and the safety valve 284 of the balanced load-sharing pressure-maintaining valve set 28 are installed on the jack, so as to minimize the potential safety hazard caused by external hydraulic pipelines.
The balanced load-sharing pressure-maintaining valve group 28 has three functions, the first function is pressure maintaining, when the jack lifts an object 10 in place, the one-way valve 31 of the balanced load-sharing pressure-maintaining valve group 28 is immediately closed, so that the jack is in a pressure maintaining state, and meanwhile, the weight of the object 10 can be safely borne by combining the leakage-free electromagnetic ball valve 282. The second function is to balance the load pressure of the jack, and the load pressure of the jack is balanced through the proportional hydraulic control adjusting valve 283, so that the jacking jack with load descending is prevented from losing pressure and sliding downwards, a workpiece can not fall off even if the oil pipe is broken, the oil inlet speed regulation is realized no matter the lifting or the descending is realized, and the safety is greatly improved. And when a plurality of jacks are connected in parallel, the load of each jack can be automatically balanced. The third function is to protect the jack from overload, when the pressure of the jack exceeds the set pressure of the safety valve 284, the safety valve 284 is automatically opened to discharge the over-high oil pressure, so as to protect the jack from overload, increase the load capacity of the jack and improve the economy.
In an embodiment of the present invention, as shown in fig. 1, the jacking power pump group 21 of the present invention includes a jacking variable-frequency speed-regulating controller 211, a jacking variable-frequency motor 212 connected to the jacking variable-frequency speed-regulating controller 211, and a jacking radial plunger pump 213 connected to the jacking variable-frequency motor 212. The jacking power pump unit 21 is used for realizing continuous flow change and pressure change. The rotation speed of the jacking variable frequency motor 212 is adjusted and controlled through the jacking variable frequency speed controller 211 to realize stepless speed regulation, and the jacking variable frequency motor 212 drives the jacking radial plunger pump 213 to perform stepless regulation on the output oil quantity and pressure.
Preferably, jacking radial plunger pump 213 adopts superhigh pressure radial plunger pump, specifically can select the valve to join in marriage a class plunger pump for use, and output efficiency is up to more than 0.98, satisfies jacking inverter motor 212 and drives superhigh pressure radial plunger pump under low rotational speed, also can reach high-efficient accurate oil mass to realize the synchronous jacking function of high accuracy.
Further, the jacking variable-frequency speed regulation controller 211 and the displacement sensor 26 form displacement closed-loop control, so that the actual jacking displacement of the jack is accurately controlled.
The jacking variable-frequency speed regulation controller 211 and the pressure sensor 27 form jacking pressure closed-loop control to realize accurate control of the jacking pressure of the jack.
In an embodiment of the present invention, as shown in fig. 1, the structure of the suspension compensation pump set 24 of the present invention is the same as that of the jacking power pump set 21, and the suspension compensation pump set 2 includes a suspension variable frequency speed controller 241, a suspension variable frequency motor 242 connected to the suspension variable frequency speed controller 241, and a suspension radial plunger pump 243 connected to the suspension variable frequency motor 242.
The suspension variable frequency speed controller 242 drives the suspension variable frequency motor 242, and a motor shaft of the suspension variable frequency motor 242 is directly connected with the suspension radial plunger pump 243 to realize continuous flow change and pressure change.
Preferably, the jacking radial plunger pump 213 of the jacking power pump unit 21 and the suspension radial plunger pump 243 of the suspension compensation pump unit 24 are both connected to a hydraulic oil tank, and are further connected to corresponding jacks through hydraulic pipelines, so as to supply oil to the jacks and provide driving force for the jacks.
Further, the suspension variable-frequency speed-regulating controller 241 and the pressure sensor 27 form a pressure compensation closed-loop control, so as to realize dynamic real-time pressure compensation.
In one embodiment of the present invention, as shown in fig. 3, the hydraulic control system of the present invention further includes a controller 29 in control connection with the jacking power pump unit 21 and the suspension compensating pump unit 24. The control of the jacking power pump unit 21 and the suspension compensation pump unit 24 can be realized through the controller 29, and further the control of the jack can be realized.
Preferably, the controller 29 is connected to the displacement sensor 26 and can receive the jacking displacement detected by the displacement sensor 26 in real time. The controller 29 is also connected with the pressure sensor 27 and can receive the real-time loaded jacking force detected by the pressure sensor 27 in real time. The controller 29 is also in control connection with the alternate control valve group 22, the reversing valve group 23, the balanced load-balancing pressure-maintaining valve group 28 and the proportional control valve 25 to control the operation of each electromagnetic valve, and the controller 29 can realize electric automatic control.
Referring to fig. 2, the jack a1 is lifted, and the jack a2 falls, specifically, the controller 29 controls the alternate control valve group 22 and the reversing valve group 23, so that the lifting radial plunger pump 213 of the lifting power pump group 21 is connected to the jack a1, the controller 29 issues an instruction to the lifting variable-frequency speed-regulating controller 211 to control the operation thereof, so as to drive the jack a1 to lift upward, when the jack a1 is lifted to a proper position, the controller 29 controls the one-way valve of the balanced load-sharing pressure-maintaining valve group 28 to close, the jack a1 is in a load-bearing suspension state, the jack a2 falls back to a support pad, that is, the cushion block is added at the bottom of the jack a2, after the support pad is completed, the jack a2 is controlled to lift the object 10 upward, and the jack a1 falls back to support the support pad, so as to cyclically and continuously lift the object 10 to a proper position.
When the jack a1 is in a jacking hovering state, the jack a1 bears the weight of the object 10, the controller 29 receives real-time jacking displacement detected by the displacement sensor 26, the real-time jacking displacement of the jack a1 is monitored, when the real-time jacking displacement changes, for example, when the jack a1 leaks due to hydraulic oil pollution or internal leakage caused by seal abrasion of the hydraulic jack causes pressure loss, data of the displacement sensor changes in a negative value, the controller 29 drives the suspension compensation pump unit 24 to perform pressure compensation on the jack a1 according to the displacement caused by the pressure leakage, the controller 29 controls the proportional control valve 25 correspondingly connected with the jack a1 to open, and the suspension compensation pump unit 24 performs pressure compensation on the jack a. Specifically, the controller 29 may calculate the jacking displacement variation in real time, and then compare the jacking displacement variation with the set displacement value, and if the jacking displacement variation is greater than or equal to the set displacement value, perform dynamic pressure compensation through the suspension compensation pump group. This suspension compensation pump package 24 carries out low rotational speed micro-adjustment according to the displacement change that each group's jack in the system carried the pressurize at the during operation, does not need the full flow work of overall process, can reduce unnecessary energy loss, and the hydraulic oil in the system can not produce too high problem yet.
In order to prevent the jack A1 from causing a displacement error to be extremely small due to rigid load, but the upper load force deviation is large, so that the structure of the object 10 is damaged or the jacks of other groups are overloaded, the controller 29 superposes a pressure instruction according to the weighing pressure of the object 10 in the jacking process to perform force balance correction, the controller 29 receives the real-time loaded jacking force of the pressure sensor 27, compares the weighing pressure with the real-time loaded jacking force according to the weighing pressure, superposes a force error value productivity integrator into a displacement closed-loop system, and drives the suspension variable-frequency speed regulation controller 241 of the suspension compensation pump group 24 in real time to perform force compensation, so that the displacement and pressure double closed-loop control is achieved. Specifically, the weighing pressure of the object is the weight of the object, the load sharing of each jack is obtained by dividing the weight by the number of the jacks to be jacked, the load sharing is compared with the real-time jacking force of the jacks according to the load sharing, and if the real-time jacking force is smaller than the load sharing, the jacks are subjected to pressure compensation according to the difference.
Further, a filter 31 is connected between the pressure sensor 27 and the controller 29, and pressure pulsation and interference in the high-pressure pipeline are eliminated through the filter 31, so that the stability and accuracy of pressure detection are improved.
Still further, a wireless data transmission interface 32 is arranged on the controller 29, and the wireless data transmission interface 32 can be connected to a wireless data transmission server, and is used for transmitting the jacking displacement and the real-time loaded jacking force received by the controller to a user through a wireless network, so as to meet the requirement of the user for real-time control over the jacking process of the object 10. Preferably, the object 10 is a building.
The invention also provides a multi-point variable frequency alternative synchronous jacking hydraulic control method with suspension compensation, which is explained below.
As shown in fig. 5, the hydraulic control method of the present invention is used for controlling multiple sets of jacks to alternatively and synchronously jack, and includes the following steps:
step S11 is executed, a plurality of jacking power pump sets are provided, the jacking power pump sets are correspondingly connected with all sets of jacks, and driving force is provided for all sets of jacks through the jacking power pump sets; then, step S12 is executed;
step S12 is executed, an alternate control valve group is provided, the alternate control valve group is connected between the corresponding jacking power pump group and the corresponding jack, and each group of jacks is controlled to alternatively jack through the alternate control valve group; then, step S13 is executed;
step S13 is executed, a reversing valve bank is provided, the reversing valve bank is connected to the reversing valve bank between the alternate control valve bank and the corresponding jack, and the corresponding jack is controlled to lift or fall back through the reversing valve bank; then, step S14 is executed;
and S14, providing a suspension compensation pump set, connecting the suspension compensation pump set with each jack, and performing real-time dynamic pressure compensation on the jacks through the suspension compensation pump set when the corresponding jacks lose pressure.
In one embodiment of the present invention, the hydraulic control method of the present invention further includes:
as shown in fig. 1, a proportional control valve 25 is provided, and the proportional control valve 25 is connected between the reversing valve group 23 and the suspension compensation pump group 24 of each group of jacks;
when the jacks of each group are alternatively jacked, the suspension compensation pump group 24 is connected with the jack which falls back through the proportional control valve 25, and a hydraulic oil source is provided for the jack which falls back.
In one embodiment of the present invention, the hydraulic control method of the present invention further includes:
the jacking displacement of each group of jacks is collected in real time;
and when the jacking displacement changes, comparing and judging the magnitude of the jacking displacement variation and the set displacement value, and if the jacking displacement variation is larger than or equal to the set displacement value, performing real-time dynamic pressure compensation on the corresponding jack through the suspension compensation pump set.
Preferably, a displacement sensor can be arranged at each group of jacks, and the jacking displacement of each group of jacks is detected in real time through the displacement sensor.
In one embodiment of the present invention, the hydraulic control method of the present invention further includes:
acquiring the lifting force of the loaded jack of each jack in real time;
calculating the sharing load of each jack according to the bearing pressure of the jacked object;
comparing the load sharing with the loaded jacking force to obtain a pressure difference value;
and driving the suspension compensation pump set to perform pressure compensation in real time according to the obtained pressure difference.
Preferably, a pressure sensor is arranged at each jack, and the real-time loaded jacking force of each jack is detected in real time through the pressure sensor.
In one embodiment of the present invention, the hydraulic control method of the present invention further includes:
and providing a balanced load-equalizing pressure-maintaining valve group 28, connecting the balanced load-equalizing pressure-maintaining valve group 28 between the reversing valve group 23 and the corresponding jack, and controlling the corresponding jack to be in a pressure-maintaining state after the jacking is finished through the balanced load-equalizing pressure-maintaining valve group 28.
While the present invention has been described in detail and with reference to the embodiments thereof as illustrated in the accompanying drawings, it will be apparent to one skilled in the art that various changes and modifications can be made therein. Therefore, certain details of the embodiments are not to be interpreted as limiting, and the scope of the invention is to be determined by the appended claims.
Claims (10)
1. The utility model provides a take multi-point frequency conversion in turn synchronous jacking hydraulic control system of suspension compensation for control multiunit jack and carry out in turn synchronous jacking, its characterized in that, hydraulic control system includes:
the jacking power pump set is arranged corresponding to each jack set;
the alternative control valve group is connected between the corresponding jacking power pump group and the jack;
the reversing valve group is connected between the alternating control valve group and the corresponding jack; and
and the suspension compensation pump set is connected with each jack.
2. The multi-point variable frequency alternate synchronous jacking hydraulic control system with levitation compensation as claimed in claim 1, further comprising a proportional control valve connected between the levitation compensation pump group and the corresponding jack.
3. The multi-point variable frequency alternate synchronous jacking hydraulic control system with suspension compensation of claim 2, wherein said proportional control valve is connected between a reversing valve set of each set of jacks and said suspension compensation pump set.
4. The multi-point variable frequency alternative synchronous jacking hydraulic control system with levitation compensation as claimed in claim 1, further comprising a displacement sensor disposed corresponding to each set of jacks for detecting jacking displacement of the corresponding jack in real time.
5. The multi-point variable frequency alternative synchronous jacking hydraulic control system with levitation compensation as claimed in claim 1, further comprising a pressure sensor mounted on each jack for detecting a real-time on-load jacking force of the corresponding jack.
6. A multipoint frequency conversion alternative synchronous jacking hydraulic control method with suspension compensation is used for controlling a plurality of groups of jacks to alternatively and synchronously jack, and is characterized by comprising the following steps:
providing a plurality of jacking power pump sets, correspondingly connecting the jacking power pump sets with each set of jacks, and providing driving force for each set of jacks through the jacking power pump sets;
providing an alternate control valve group, connecting the alternate control valve group between the corresponding jacking power pump group and the corresponding jack, and controlling each group of jacks to alternatively jack through the alternate control valve group;
providing a reversing valve bank, connecting the reversing valve bank between the alternate control valve bank and the corresponding jack, and controlling the corresponding jack to lift or fall back through the reversing valve bank; and
and providing a suspension compensation pump set, connecting the suspension compensation pump set with each jack, and carrying out real-time dynamic pressure compensation on the jack through the suspension compensation pump set when the corresponding jack is subjected to pressure loss.
7. The multi-point variable frequency alternate synchronous jacking hydraulic control method with levitation compensation as claimed in claim 6, further comprising:
providing a proportional control valve, and connecting the proportional control valve between a reversing valve group of each group of jacks and the suspension compensation pump group;
when the jacks of each group are alternatively jacked, the suspension compensation pump group is connected with the jack which falls back through the proportional control valve, and a hydraulic oil source is provided for the jack which falls back.
8. The multi-point variable frequency alternate synchronous jacking hydraulic control method with levitation compensation as claimed in claim 6, further comprising:
the jacking displacement of each group of jacks is collected in real time;
when the jacking displacement changes, the magnitude of the jacking displacement variation and the set displacement value is compared and judged, and if the jacking displacement variation is larger than or equal to the set displacement value, real-time dynamic pressure compensation is carried out on the corresponding jack through the suspension compensation pump set.
9. The multi-point variable frequency alternate synchronous jacking hydraulic control method with levitation compensation as claimed in claim 6, further comprising:
acquiring the lifting force of the loaded jack of each jack in real time;
calculating the sharing load of each jack according to the bearing pressure of the jacked object;
comparing the load sharing with the loaded jacking force to obtain a pressure difference value;
and driving the suspension compensation pump set to perform pressure compensation in real time according to the obtained pressure difference.
10. The multi-point variable frequency alternate synchronous jacking hydraulic control method with levitation compensation as claimed in claim 6, further comprising:
and providing a balanced load-equalizing pressure-maintaining valve group, connecting the balanced load-equalizing pressure-maintaining valve group between the reversing valve group and the corresponding jack, and controlling the corresponding jack to be in a pressure-maintaining state after the jacking is finished through the balanced load-equalizing pressure-maintaining valve group.
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| GB1148496A (en) * | 1965-03-31 | 1969-04-10 | Costain Ltd Richard | Improvements relating to methods of constructing buildings and jacking systems for use therewith |
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| CN103572837A (en) * | 2012-07-30 | 2014-02-12 | 上海天演建筑物移位工程有限公司 | Building jacking system and jacking method |
| CN111255776A (en) * | 2020-05-07 | 2020-06-09 | 上海建工集团股份有限公司 | Hydraulic control system and method for whole steel platform formwork of super high-rise building |
| CN111794556A (en) * | 2020-07-22 | 2020-10-20 | 上海同罡建筑工程有限公司 | Building jacking control system and method |
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| GB1148496A (en) * | 1965-03-31 | 1969-04-10 | Costain Ltd Richard | Improvements relating to methods of constructing buildings and jacking systems for use therewith |
| CN101367488A (en) * | 2008-09-02 | 2009-02-18 | 芜湖市银鸿液压件有限公司 | Hydraulic lifting apparatus |
| CN103572837A (en) * | 2012-07-30 | 2014-02-12 | 上海天演建筑物移位工程有限公司 | Building jacking system and jacking method |
| CN103205940A (en) * | 2013-04-22 | 2013-07-17 | 成都建筑工程集团总公司 | Slope-variable proportional alternate jacking construction method for continuous beam bridges |
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Inventor after: Zhang Bailin Inventor after: Peng Hongyun Inventor after: Shu Xuezhi Inventor after: Wang Jianyong Inventor after: Wu Yong Inventor after: Wang Xueyuan Inventor after: Wang Chenghui Inventor after: Zhang Guiyu Inventor after: Zhang Haiping Inventor after: Xiao Jianzhuang Inventor after: Peng Yongping Inventor after: Li Jing Inventor after: Li Baoqiang Inventor after: Chen Guoxin Inventor after: Li Fangyuan Inventor after: Zhang Hao Inventor before: Zhang Bailin Inventor before: Shu Xuezhi Inventor before: Wang Jianyong Inventor before: Wu Yong Inventor before: Wang Xueyuan Inventor before: Wang Chenghui Inventor before: Zhang Haiping Inventor before: Peng Yongping Inventor before: Li Jing Inventor before: Li Baoqiang Inventor before: Chen Guoxin Inventor before: Li Fangyuan Inventor before: Zhang Hao Inventor before: Peng Hongyun |