CN114477001B - Multi-point variable frequency alternative synchronous jacking hydraulic control system and method with suspension compensation - Google Patents
Multi-point variable frequency alternative synchronous jacking hydraulic control system and method with suspension compensation Download PDFInfo
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- CN114477001B CN114477001B CN202111624011.3A CN202111624011A CN114477001B CN 114477001 B CN114477001 B CN 114477001B CN 202111624011 A CN202111624011 A CN 202111624011A CN 114477001 B CN114477001 B CN 114477001B
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- 239000000725 suspension Substances 0.000 title claims abstract description 92
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000006073 displacement reaction Methods 0.000 claims description 67
- 239000003921 oil Substances 0.000 claims description 28
- 230000001276 controlling effect Effects 0.000 claims description 16
- 239000010720 hydraulic oil Substances 0.000 claims description 12
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 19
- 238000005339 levitation Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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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
-
- 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
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention relates to a multi-point variable frequency alternate synchronous jacking hydraulic control system with suspension compensation and a method thereof, which are used for controlling a plurality of groups of jacks to perform alternate synchronous jacking, and comprise the following steps: jacking power pump sets corresponding to the jacks in each group; the alternating control valve groups are connected between the corresponding jacking power pump group and the jack; the reversing valve groups are connected between the alternating control valve groups and the corresponding jacks; and the suspension compensation pump set is connected with each jack. According to the invention, the lifting power pump set is used for providing driving force for each group of jacks, so that the requirement of alternate synchronous lifting operation of each group of jacks can be met, when the jacks are lifted in place and suspended by load, the suspension compensation pump set is used for carrying out real-time dynamic pressure compensation on the jacks, so that the timely pressure compensation is ensured to be provided for the jacks which lose pressure, the safety control of online compensation pressure is provided for the jacks suspended by load, and the safety of alternate synchronous lifting construction is improved.
Description
Technical Field
The invention relates to the technical field of hydraulic mechanical equipment, in particular to a multi-point variable frequency alternating synchronous jacking hydraulic control system and method with suspension compensation.
Background
When large-scale building is lifted in a large scale, the cushion blocks are usually used for jacking step by step, each time, 100-200 mm is jacked, then the large-scale building is placed on the fixed supporting pad, the lifting jack is retracted, the cushion blocks under the lifting jack are added, the lifting jack is started again, and the second step of lifting is performed until the lifting 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 building base line cannot be maintained with high precision, the construction process has the hidden danger of overstrain, and the structural safety cannot be effectively ensured.
The existing alternating support pad continuous jacking construction method effectively solves the problems, the alternating support pad continuous jacking construction method utilizes the redundancy of increasing the jacking force, does not fall down a building, and carries out support pad grouping jacking and retracting jacking jacks synchronously, so that jacking construction is carried out continuously. Because no process of falling back to the fixed support pad exists, the whole jacking process is guaranteed, the stress of the building structure is even, and the construction is smooth and efficient.
However, in the current construction process, a group of jacks are supported in the lifting pressure maintaining mode, a group of jacks are supported in the falling support mode, the situation that a group of jacks supported in the lifting pressure maintaining mode leak a little due to the hydraulic pressure maintaining valve and the sealing rings in the jacks leak a little occurs, the phenomenon that the jacks of the group lose pressure and other groups lose pressure to cause overload occurs, and unpredictable huge risks are brought to the lifting construction of a building. The key equipment of the existing alternate support pad continuous jacking construction method is an alternate jacking hydraulic pump station, and the existing jacking construction potential safety hazard cannot be solved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a multi-point variable frequency alternating synchronous jacking hydraulic control system and method with suspension compensation, and solves the problems that the jacking pressure-maintaining supporting jacks are out of pressure in the existing alternating type supporting pad continuous jacking construction, so that other groups of jacks are overloaded and unpredictable huge risks are brought to a building.
The technical scheme for achieving the purpose is as follows:
the invention provides a multi-point variable frequency alternate synchronous jacking hydraulic control system with suspension compensation, which is used for controlling a plurality of groups of jacks to perform alternate synchronous jacking and is characterized in that the hydraulic control system comprises:
jacking power pump sets corresponding to the jacks in each group;
the alternating control valve groups are connected between the corresponding jacking power pump group and the jack;
the reversing valve groups are connected between the alternating control valve groups and the corresponding jacks; 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 lifting power pump group, can meet the requirement of alternate synchronous lifting operation of each group of jacks, and performs real-time dynamic pressure compensation on the jacks through the suspension compensation pump group when the jacks are lifted in place and suspended in load, thereby ensuring the timely pressure compensation for the pressure-losing jacks, providing the safety control of online compensation pressure for the jacks suspended in load and improving the safety of alternate synchronous lifting construction. And the suspension compensation pump set also provides a hydraulic oil source for the jack which provides a fall back for the other jack in the lifting process of one jack, so that the lifting jack and the fall back jack in the group of jacks are synchronously carried out, and the safety and the construction efficiency of alternate lifting can be improved.
The invention further improves the multipoint variable frequency alternative synchronous jacking hydraulic control system with suspension compensation, which is characterized by further comprising a proportional control valve connected between the suspension compensation pump group and a corresponding jack.
The invention further improves a multi-point variable frequency alternative synchronous jacking hydraulic control system with suspension compensation, which is characterized 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 invention further improves a multipoint variable frequency alternative synchronous jacking hydraulic control system with suspension compensation, which is characterized by further comprising displacement sensors corresponding to each group of jacks and used for detecting the jacking displacement of the corresponding jacks in real time.
The invention further improves a multi-point variable frequency alternative synchronous jacking hydraulic control system with suspension compensation, which is characterized by further comprising pressure sensors arranged on the jacks and used for detecting the real-time on-load jacking force of the corresponding jacks.
The invention also provides a multi-point variable frequency alternative synchronous jacking hydraulic control method with suspension compensation, which is used for controlling a plurality of groups of jacks to carry out alternative synchronous jacking, and comprises the following steps:
providing a plurality of jacking power pump sets, correspondingly connecting the jacking power pump sets with each group of jacks, and providing driving force for each group of jacks through the jacking power pump sets;
providing an alternative control valve group, connecting the alternative control valve group between a corresponding jacking power pump group and the jacks, and controlling each group of jacks to alternately jack through the alternative control valve group;
providing a reversing valve group, connecting the reversing valve group between the alternating control valve group and a corresponding jack, and controlling the corresponding jack to lift or fall back through the reversing valve group; 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 loses pressure.
The invention relates to a multi-point variable frequency alternative synchronous jacking hydraulic control method with suspension compensation, which is further improved in that the method also comprises the following steps:
providing a proportional control valve, and connecting the proportional control valve between the reversing valve group of each group of jacks and the suspension compensation pump group;
when each group of jacks alternately lift, the suspension compensation pump set is connected with the falling jack through the proportional control valve, and a hydraulic oil source is provided for the falling jack.
The invention relates to a multi-point variable frequency alternative synchronous jacking hydraulic control method with suspension compensation, which is further improved in that the method also comprises the following steps:
collecting the jacking displacement of each group of jacks in real time;
when the jacking displacement changes, comparing and judging the jacking displacement change amount with a set displacement value, and if the jacking displacement change amount 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.
The invention relates to a multi-point variable frequency alternative synchronous jacking hydraulic control method with suspension compensation, which is further improved in that the method also comprises the following steps:
collecting the carrying lifting force of each jack in real time;
calculating the sharing load of each jack according to the bearing pressure of the lifted object;
comparing the shared load with the loaded lifting force to obtain a pressure difference value;
and driving the suspension compensation pump set in real time to perform pressure compensation according to the obtained pressure difference.
The invention relates to a multi-point variable frequency alternative synchronous jacking hydraulic control method with suspension compensation, which is further improved in that the method also comprises the following steps:
and providing a balance uniform load pressure maintaining valve group, connecting the balance uniform load 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 balance uniform load pressure maintaining valve group.
Drawings
FIG. 1 is a system diagram of a suspension compensated multi-point variable frequency alternating synchronous jacking hydraulic control system of the invention.
Fig. 2 is a schematic structural diagram of a group of jacks in a lifting state and another jack in a falling state in the suspension compensation multi-point variable frequency alternative synchronous lifting hydraulic control system.
Fig. 3 is a schematic structural diagram of a group of jacks connected with a controller in the suspension compensation multi-point variable frequency alternative synchronous lifting hydraulic control system.
Fig. 4 is an enlarged schematic structural diagram of connection between a balance load-balancing pressure-maintaining valve group and a corresponding jack in the suspension compensation multi-point variable frequency alternative synchronous lifting hydraulic control system.
Fig. 5 is a flow chart of the multi-point variable frequency alternative synchronous jacking hydraulic control method with suspension compensation.
Detailed Description
The invention will be further described with reference to the drawings and the specific examples.
Referring to fig. 1, the invention provides a multi-point variable frequency alternating synchronous jacking hydraulic control system and method with suspension compensation, which are used for meeting the continuous jacking construction of alternating support pads and solving the potential safety hazard of pressure loss caused by leakage of a hydraulic pressure maintaining valve member or internal leakage generated by sealing abrasion of a hydraulic jack due to pollution of hydraulic oil in the jacking construction process. After a jack is lifted in place to hover with load, the suspension compensation pump set provides safety control of online compensation pressure for the lifting jack hovering with load, and the phenomenon that the lifting jack loses pressure to cause overload to other lifting jacks is avoided. The suspension compensation pump set is also used for providing a hydraulic oil source for the falling jack, realizing the cylinder retraction control of the falling jack, enabling the falling jack to synchronously act with the lifting jack, improving the falling speed of the jack, further improving the efficiency of alternate lifting, meeting the safety of alternate lifting and greatly improving the construction efficiency. The invention relates to a multi-point variable frequency alternating synchronous jacking hydraulic control system with suspension compensation and a method thereof, which are described below with reference to the accompanying drawings.
Referring to fig. 1, a system diagram of a suspension compensated multi-point variable frequency alternating synchronous jacking hydraulic control system of the invention is shown. The following describes the multi-point variable frequency alternative synchronous jacking hydraulic control system with suspension compensation according to the invention with reference to fig. 1.
As shown in fig. 1, the multi-point variable frequency alternative synchronous lifting hydraulic control system with suspension compensation of the invention comprises a lifting power pump set 21, an alternative control valve set 22, a reversing valve set 23 and a suspension compensation pump set 24, wherein the hydraulic control system is used for controlling a plurality of groups of jacks to perform alternative synchronous lifting, one group of jacks at least comprises two jacks, one jack lifts and hovers, the other jack falls back to carry out supporting, and then alternative lifting and falling back are carried out, so that alternative synchronous lifting is realized, and the object 10 can be continuously lifted upwards. In the example shown in fig. 1, four groups of jacks are shown, a group of jacks is formed by the jack A1 and the jack A2, a group of jacks is formed by the jack B1 and the jack B2, a group of jacks is formed by the jack C1 and the jack C2, a group of jacks is formed by the jack D1 and the jack D2, the jacks A1, B1, C1 and D1 are lifted, the jacks A2, B2, C2 and D2 are used for falling back support pads, the jacks A1, B1, C1 and D1 are lifted in place and then hover, and after the jacks A2, B2, C2 and D2 are lifted to the jack object 10, the jacks A1, B1, C1 and D1 are synchronously fallen back. The hydraulic control system of the present invention can be adapted to the alternate synchronous jacking operation of n groups of jacks, where n is a positive integer, the number of jacks depending on the size of the object 10.
The number of the jacking power pump groups 21 in the hydraulic control system is consistent with the number of groups of jacks, and the jacking power pump groups 21 are correspondingly arranged with the jacks of each group and are used for providing driving force for the jacks of each group; the alternating control valve group 22 is connected between the corresponding jacking power pump group 21 and the jack, and the alternating control valve group 22 is used for controlling the corresponding jack to perform alternating jacking so as to meet the continuous jacking construction of the alternating support pad; the reversing valve group 23 is connected between the alternating control valve group 22 and the corresponding jack, and the reversing valve group 23 is used for controlling the corresponding jack to lift or fall back, so as to control the moving direction of the jack. Preferably, the number of the alternating control valve groups 22 and the reversing valve groups 23 is also consistent with the number of groups of jacks, and the alternating control valve groups and the reversing valve groups are arranged corresponding to the jacks of each group. The suspension compensation pump set 24 is connected with each jack, and the suspension compensation pump set 24 is used for providing implementation dynamic pressure compensation for the jack after the jack is in lifting suspension, and the suspension compensation pump set 24 can timely provide pressure compensation for the jack after the jack is in lifting suspension if a pressure loss condition occurs, so that the safety of lifting construction can be ensured, and the problem of potential safety hazards caused by leakage of pressure maintaining valve members or leakage of sealing rings after the jack is in lifting suspension 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 group 24 and the corresponding jack. The communication between the suspension compensation pump group 24 and the corresponding jack can be controlled through the proportional control valve 25, and when the corresponding jack needs to perform 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 consistent with 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 and the suspension compensating pump group 24 of each group of jacks, the reversing valve group 23 can control lifting or falling of the jacks, the proportional control valve 25 is connected with the reversing valve group 23, so that the suspension compensating pump group 24 not only can provide safety control of online compensating pressure for lifting and suspending jacks, but also can provide a hydraulic oil source for another jack during lifting of one jack, and the control of synchronous cylinder collection of the jacks is realized through power supply reversing of the reversing valve group, thereby not only meeting the safe alternate lifting, but also greatly improving the construction efficiency. Specifically, as shown in fig. 2, the jack A1 is lifted upwards, the jack A2 falls back downwards, the reversing valve corresponding to the jack A1 opens the right valve, so that the lifting power pump set 21 supplies oil to the lower oil pipe 11 of the jack A1, thereby driving the jack A1 to lift upwards, synchronously, the reversing valve corresponding to the jack A2 opens the left valve, and the corresponding proportional control valve 25 also opens, so that the suspension compensation pump set 24 supplies oil to the upper oil pipe 12 of the jack A2, drives the jack A2 to fall back downwards, improves the cylinder collecting speed of the jack A2, the upper oil pipe 12 of the jack A2 supplies oil to the jack A2, and hydraulic oil returns to the oil tank through the lower oil pipe of the jack A2. Therefore, the lifting jack can be changed into oil inlet speed regulation no matter ascending or descending, and the safety of the lifting jack can be improved.
In one 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 lifting 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 between the lower surface of the object 10 and the ground (or other bearing surfaces, such as a counterforce foundation) can be detected in real time by the displacement sensor 26, namely, the jacking displacement of the jack. The displacement sensor 26 may also be mounted on the ground (or other load bearing surface, such as a counter-force basis) 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 in real time by the displacement sensor 26 is used as feedback to detect whether the jack is jacked in place, and the control of jacking can be achieved by controlling the stroke of the jack when the jack is provided with driving force by the jacking power pump group 21.
In another preferred embodiment, the lifting displacement detected in real time by the displacement sensor 26 can be used for detecting the pressure loss of the lifting hovering jack, when the lifting displacement detected by the displacement sensor can generate negative change when the lifting hovering jack is in pressure loss, and the pressure compensation can be provided for the lifting jack through the suspension compensation pump set 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 lifting force of the corresponding jack.
In a preferred embodiment, the pressure sensor 27 detects the real-time loaded lifting force of the jack in real time, and in the lifting process, the real-time loaded lifting force is used as feedback to control the lifting power pump set to provide oil pressure for driving the jack, so as to realize oil supply control in the lifting process of the jack.
In another preferred embodiment, when the jack is in a lifting and hovering state, the real-time load lifting force of the jack is detected in real time, the real-time load lifting force is compared with the weighing pressure of the object, and the suspension compensation pump set is controlled in real time to carry out pressure compensation through the obtained pressure difference value.
In one embodiment of the present invention, as shown in fig. 1, the hydraulic control system of the present invention further includes a balancing and load maintaining valve group 28 disposed corresponding to each group of jacks, and the balancing and load maintaining valve group 28 is connected between the reversing valve group 23 and the corresponding jack.
Further, as shown in fig. 4, the balanced load-balancing pressure-maintaining valve set 28 includes a one-way valve 281 and a leak-free electromagnetic ball valve 282 mounted on an oil return pipeline of the jack, and a proportional pilot control regulating valve 283 and a safety valve 284 mounted between an oil supply pipeline and an oil return pipeline of the jack. Preferably, a relief valve 284 is connected at one end to the return line and at the other end between the 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 in the balanced load pressure maintaining valve set 28 are installed on the jack, so that the accidental potential safety hazard caused by external hydraulic pipelines can be reduced to the greatest extent.
The balanced uniform load pressure maintaining valve group 28 has three functions, namely pressure maintaining, the first function is that after the jack lifts the object 10 in place, the check valve 31 of the balanced uniform load pressure maintaining valve group 28 is closed immediately, 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 non-leakage 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 regulating valve 283, so that the lifting jack with load descending cannot slide down without losing pressure, a workpiece cannot fall even if an oil pipe breaks, the lifting jack can be lifted or lowered to be changed into oil inlet for speed regulation, and the safety is greatly improved. And meanwhile, when a plurality of jacks are connected in parallel, the load of each jack can be balanced automatically. 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, the excessive oil pressure is discharged, the jack is protected from overload, the load capacity of the jack is increased, and the economical efficiency is improved.
In one 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 control 211, a jacking variable frequency motor 212 connected to the jacking variable frequency speed control 211, and a jacking radial plunger pump 213 connected to the jacking variable frequency motor 212. The jacking power pump group 21 is used to achieve continuous flow and pressure changes. The jacking variable frequency motor 212 drives the jacking radial plunger pump 213 to realize stepless speed regulation by regulating and controlling the rotation speed of the jacking variable frequency motor 212 through the jacking variable frequency speed controller 211, and the output oil quantity and pressure can be regulated steplessly.
Preferably, the jack-up radial plunger pump 213 adopts an ultra-high pressure radial plunger pump, and particularly a valve flow distribution plunger pump is selected, the output efficiency is up to more than 0.98, and the jack-up variable frequency motor 212 is driven at a low rotating speed to drive the ultra-high pressure radial plunger pump, so that the high-efficiency and accurate oil quantity can be achieved, and the high-precision synchronous jack-up function is realized.
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, so that the jacking pressure of the jack is accurately controlled.
In a specific embodiment of the present invention, as shown in fig. 1, the structure of the levitation compensation pump set 24 of the present invention is the same as that of the jacking power pump set 21, and the levitation compensation pump set 2 includes a levitation variable frequency speed control 241, a levitation variable frequency motor 242 connected with the levitation variable frequency speed control 241, and a levitation radial plunger pump 243 connected with the levitation variable frequency motor 242.
The suspension variable frequency motor 242 is driven by the suspension variable frequency speed controller 242, and the motor shaft of the suspension variable frequency motor 242 is directly connected with the suspension radial plunger pump 243, so that continuous flow change and pressure change are realized.
Preferably, the lifting radial plunger pump 213 of the lifting power pump set 21 and the suspension radial plunger pump 243 of the suspension compensation pump set 24 are both connected with a hydraulic oil tank, and are also connected with corresponding jacks through hydraulic pipelines, so as to realize oil supply for the jacks and provide driving force for the jacks.
Further, the suspension variable frequency speed regulation controller 241 and the pressure sensor 27 form pressure compensation closed-loop control, so that dynamic real-time pressure compensation is realized.
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 group 21 and the levitation compensation pump group 24. The control of the jacking power pump unit 21 and the suspension compensation pump unit 24 and thus the jack can be realized through the controller 29.
Preferably, the controller 29 is connected to the displacement sensor 26, and is capable of receiving the jacking displacement detected by the displacement sensor 26 in real time. The controller 29 is also connected to the pressure sensor 27 and is capable of receiving real-time on-load lift detected in real time by the pressure sensor 27. The controller 29 is also in control connection with the alternating control valve group 22, the reversing valve group 23, the balance average load pressure maintaining valve group 28 and the proportional control valve 25 so as to control the operation of each electromagnetic valve, and the electric automatic control can be realized through the controller 29.
As shown in fig. 2, the jack A1 is lifted, the jack A2 falls back, specifically, the controller 29 controls the alternating 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 with the jack A1, the controller 29 issues a command to the lifting variable-frequency speed regulation controller 211 to control the lifting variable-frequency speed regulation controller to operate, the jack A1 is driven to lift upwards, when the jack A1 is lifted in place, the controller 29 controls the check valve of the balanced uniform-load pressure maintaining valve group 28 to be closed, the jack A1 is in a bearing and suspending state, the cushion is added at the bottom of the jack A2 after the jack A2 falls back, the jack A2 is controlled to lift up the object 10 upwards after the cushion is completed, and the jack A1 falls back to support the cushion, so that the alternating support cushion continuously lifts the object 10 until the object 10 is lifted in place.
When the jack A1 is in a lifting hovering state, the jack A1 bears the weight of an object 10, the controller 29 receives the real-time lifting displacement detected by the displacement sensor 26, the real-time lifting displacement of the jack A1 is monitored, when the real-time lifting displacement changes, for example, when the jack A1 leaks due to hydraulic oil pollution or internal leakage caused by hydraulic jack sealing abrasion occurs, the data of the displacement sensor changes in a negative value, the controller 29 drives the suspension compensation pump set 24 to perform pressure compensation on the jack A1 according to the displacement caused by pressure leakage, the controller 29 controls the proportional control valve 25 correspondingly connected with the jack A1 to be opened, and the suspension compensation pump set 24 performs pressure compensation on the jack a. Specifically, the controller 29 may calculate the jacking displacement variation in real time, and further 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 set. When the suspension compensation pump set 24 works, the low-rotation-speed micro-adjustment is carried out according to the displacement change of the bearing pressure maintaining of each group of jacks in the system, the whole process of full-flow work is not needed, unnecessary energy loss can be reduced, and the problem that the hydraulic oil in the system is too high is avoided.
In order to prevent the jack A1 from causing extremely small displacement error due to rigid load, but larger upper load force deviation, which causes damage to the structure of the object 10 or overload of other groups of jacks, the controller 29 superimposes a pressure command to perform force balance correction according to the weighing pressure of the object 10 in the lifting process, the controller 29 receives the real-time load lifting force of the pressure sensor 27, compares the real-time load lifting force with the weighing pressure, and superimposes a force error value productivity integrator into a displacement closed-loop system to drive the suspension variable-frequency speed regulation controller 241 of the suspension compensation pump set 24 in real time for force compensation, thereby achieving double closed-loop control of displacement and pressure. Specifically, the weighing pressure of the object is the weight of the object, the shared load of each jack is obtained by dividing the weight by the number of the jacks, the shared load is compared with the real-time loaded lifting force of the jack, and if the real-time loaded lifting force is smaller than the shared load, the jack is subjected to pressure compensation according to the difference value.
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 stability and accuracy of pressure detection are improved.
Still further, the controller 29 is provided with a wireless data transmission interface 32, and the wireless data transmission interface 32 can be connected with a wireless data transmission server, so as to transmit the jacking displacement and the real-time on-load jacking force received by the controller to a user through a wireless network, so as to meet the real-time control of the user on 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, and the hydraulic control method is described below.
As shown in fig. 5, the hydraulic control method of the present invention is used for controlling a plurality of groups of jacks to alternately and synchronously lift, 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 the jacks of each group, and driving force is provided for the jacks of each group through the jacking power pump sets; step S12 is then performed;
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 jack, and the jacks of each group are controlled to alternately jack through the alternate control valve group; step S13 is then executed;
step S13 is executed, a reversing valve group is provided, the reversing valve group is connected between the alternating control valve group and the reversing valve group between the corresponding jacks, and the corresponding jacks are controlled to lift or fall back through the reversing valve group; step S14 is then performed;
and S14, 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 loses pressure.
In one embodiment of the present invention, the hydraulic control method of the present invention further includes:
as shown in connection with fig. 1, a proportional control valve 25 is provided, the proportional control valve 25 being connected between the reversing valve group 23 and the suspension compensation pump group 24 of each group of jacks;
when each group of jacks alternately lift, the suspension compensation pump group 24 is connected with the falling jack through the proportional control valve 25, and a hydraulic oil source is provided for the falling jack.
In one embodiment of the present invention, the hydraulic control method of the present invention further includes:
collecting the jacking displacement of each group of jacks in real time;
when the jacking displacement changes, the jacking displacement change amount is compared and judged with the set displacement value, and if the jacking displacement change amount is larger than or equal to the set displacement value, the corresponding jack is subjected to real-time dynamic pressure compensation through the suspension compensation pump group.
Preferably, displacement sensors can be arranged at the positions of the jacks of each group, and the lifting displacement of the jacks of each group is detected in real time through the displacement sensors.
In one embodiment of the present invention, the hydraulic control method of the present invention further includes:
collecting the carrying lifting force of each jack in real time;
calculating the sharing load of each jack according to the bearing pressure of the lifted object;
comparing the shared load with the loaded lifting force to obtain a pressure difference value;
and driving the suspension compensation pump set in real time to perform pressure compensation according to the obtained pressure difference.
Preferably, a pressure sensor is arranged at each jack, and the real-time on-load lifting 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 balance uniform load pressure maintaining valve group 28, connecting the balance uniform load 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 balance uniform load pressure maintaining valve group 28.
The present invention has been described in detail with reference to the embodiments of the drawings, and those skilled in the art can make various modifications to the invention based on the above description. Accordingly, certain details of the illustrated embodiments are not to be taken as limiting the invention, which is defined by the appended claims.
Claims (2)
1. The utility model provides a take suspension compensation's multiple spot frequency conversion synchronous jacking hydraulic control system in turn for control multiunit jack carries out synchronous jacking in turn, its characterized in that, hydraulic control system includes:
jacking power pump sets corresponding to the jacks in each group;
the alternating control valve groups are connected between the corresponding jacking power pump group and the jack;
the reversing valve groups are connected between the alternating control valve groups and the corresponding jacks; and
a suspension compensation pump group connected with each jack;
the proportional control valve is connected between the suspension compensation pump set and the corresponding jack;
the proportional control valve is connected between the reversing valve group of each group of jacks and the suspension compensation pump group, so that the suspension compensation pump group can provide safety control of online compensation pressure for the jack which is lifted and hovered, and can provide a hydraulic oil source for one jack when the other jack is lifted, and the control of synchronous cylinder collection of the jacks is realized by power supply reversing of the reversing valve group;
the jack lifting device also comprises displacement sensors corresponding to each group of jacks, and the displacement sensors are used for detecting the lifting displacement of the corresponding jacks in real time;
the device also comprises pressure sensors arranged on the jacks and used for detecting the real-time on-load lifting force of the corresponding jack;
the balance load balancing and pressure maintaining valve group is arranged corresponding to each group of jacks and comprises a one-way valve and a non-leakage electromagnetic ball valve which are arranged on an oil return pipeline of the jack, and a proportional hydraulic control regulating valve and a safety valve which are arranged between an oil supply pipeline and an oil return pipeline of the jack;
the device also comprises a controller in control connection with the jacking power pump set and the suspension compensation pump set;
the controller is connected with the displacement sensor and the pressure sensor, and can receive the jacking displacement detected by the displacement sensor in real time and the real-time on-load jacking force detected by the pressure sensor in real time;
the controller is also in control connection with the alternating control valve group, the reversing valve group, the balance uniform load pressure-maintaining valve group and the proportional control valve;
after the jack is lifted in place, the controller controls the one-way valve of the balance uniform-load pressure maintaining valve group to be closed, and the jack is in a bearing suspension state;
the controller monitors the real-time jacking displacement, and the controller drives the suspension compensation pump set to perform pressure compensation on the jack according to the displacement caused by pressure leakage;
the weighing pressure of the object is the weight of the object, the sharing load of each jack is obtained by dividing the weight by the number of the jacks, the real-time load lifting force of each jack is compared according to the sharing load, and if the real-time load lifting force is smaller than the sharing load, the pressure compensation is carried out on the jacks according to the difference value.
2. The multi-point variable frequency alternate synchronous jacking hydraulic control method with suspension compensation is used for controlling a plurality of groups of jacks to perform alternate synchronous jacking and is characterized by comprising the following steps of:
providing a plurality of jacking power pump sets, correspondingly connecting the jacking power pump sets with each group of jacks, and providing driving force for each group of jacks through the jacking power pump sets;
providing an alternative control valve group, connecting the alternative control valve group between a corresponding jacking power pump group and the jacks, and controlling each group of jacks to alternately jack through the alternative control valve group;
providing a reversing valve group, connecting the reversing valve group between the alternating control valve group and a corresponding jack, and controlling the corresponding jack to lift or fall back through the reversing valve group; 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 loses pressure;
further comprises:
providing a proportional control valve, and connecting the proportional control valve between the reversing valve group of each group of jacks and the suspension compensation pump group;
when each group of jacks alternately lift, the suspension compensation pump set is connected with the falling jack through the proportional control valve, and a hydraulic oil source is provided for the falling jack;
further comprises:
collecting the jacking displacement of each group of jacks in real time;
when the jacking displacement changes, comparing and judging the jacking displacement change amount with a set displacement value, and if the jacking displacement change amount 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;
further comprises:
collecting the carrying lifting force of each jack in real time;
calculating the sharing load of each jack according to the bearing pressure of the lifted object;
comparing the shared load with the load lifting force to obtain a pressure difference value, and performing pressure compensation on the jack according to the difference value if the real-time load lifting force is smaller than the shared load;
further comprises:
providing a balance uniform load pressure maintaining valve group, connecting the balance uniform load pressure maintaining valve group between the reversing valve group and a corresponding jack, and controlling the corresponding jack to be in a pressure maintaining state after the jacking is finished through the balance uniform load pressure maintaining valve group;
the balance load balancing and pressure maintaining valve group comprises a one-way valve and a leakage-free electromagnetic ball valve which are arranged on an oil return pipeline of the jack, and a proportional hydraulic control regulating valve and a safety valve which are arranged between an oil supply pipeline and an oil return pipeline of the jack.
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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 |