CN104355256B - The guard method of the pressurization steel wire rope of piling machinery - Google Patents
The guard method of the pressurization steel wire rope of piling machinery Download PDFInfo
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- CN104355256B CN104355256B CN201410478023.3A CN201410478023A CN104355256B CN 104355256 B CN104355256 B CN 104355256B CN 201410478023 A CN201410478023 A CN 201410478023A CN 104355256 B CN104355256 B CN 104355256B
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- steel wire
- wire rope
- pressurization
- pressurization steel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/54—Safety gear
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B3/00—Rotary drilling
Abstract
A kind of guard method of the pressurization steel wire rope of piling machinery, piling machinery includes controller, pressurization steel wire rope, pressurization elevator, compression motor and unit head, compression motor is used for driving pressurization elevator, compression motor is automatically controlled variable displacement motor and has automatically controlled stroking mechanism, controller is connected with automatically controlled stroking mechanism, pressurization steel wire rope is around being located on pressurization elevator and unit head, unit head is pressurizeed by pressurization elevator by the steel wire rope that pressurizes, and guard method includes: obtain the current net cycle time of pressurization steel wire rope; Current net cycle time according to pressurization steel wire rope, it is thus achieved that pressurization steel wire rope is at the pulling force that currently can bear; According to pressurization steel wire rope at the pulling force that currently can bear, it is thus achieved that automatically controlled stroking mechanism is at the electric current of currently permitted input; And according to the automatically controlled stroking mechanism electric current in currently permitted input, control the input operating current to automatically controlled stroking mechanism lower than the automatically controlled stroking mechanism electric current in currently permitted input.
Description
Technical field
The present invention relates to the technical field of piling machinery, especially with regard to the guard method of the pressurization steel wire rope of a kind of piling machinery.
Background technology
In various pile foundation constructions, being used for holing, drive piles, the machinery of pile sinking is referred to as piling machinery, concrete kind includes rotary drilling rig, rig, spiral Squeezing Soil Pile machine etc. are grabbed in convolution rig, punching. In all kinds of piling machinerys, rotary drilling rig is widely used.
Churning driven is the construction technology of pore-forming operation in a kind of applicable building foundation engineering. it is widely used in the ground foundation construction works such as urban construction, highway bridge, skyscraper, coordinate different drilling tool, it is adapted to dry type (short spiral) or the pore-forming operation of wet type (rotary bucket) and rock stratum (rock core drill). Rotary drilling rig has that installed power is big, output moment of torsion is big, axial compressive force big, maneuverability, efficiency of construction height and multifunctional characteristics, it adapts to the soil-geological condition of China's most area, uses scope wide, substantially bridge construction, the use of the engineerings such as tall building foundation plinth can be met. At present, rotary drilling rig has been widely popularized in various Grouting Pile Engineering of Drilling Hole.
Rotary drilling rig is when creeping into, it is necessary to drill bit is pressurizeed, and at present frequently with the mode of elevator pressurization, this rotary drilling rig structurally generally includes mast, pressurization elevator, pressurization steel wire rope, unit head, arbitrary-movement articulator, drilling rod and drill bit. Drill bit is arranged on the end of drilling rod, and drilling rod is connected with mast by unit head and arbitrary-movement articulator, and pressurization steel wire rope is connected with pressurization elevator and unit head, for unit head is applied downward plus-pressure, makes unit head drive drilling rod and drill bit to creep into underground. Wherein, pressurization wirerope-winding is on fixed pulley and movable pulley, and fixed pulley is fixed on mast, and movable pulley is fixed on unit head, pressurization elevator drives pressurization steel wire rope power to be passed to the movable pulley on unit head, and unit head accepts the power of pressurization wire rope transfers and drilling rod is carried out pressurized operation.
But, owing to pressurization wirerope-winding is on pulley, it in use there will be flexural fatigue, abrasion etc. affects the situation of rope service-life, simultaneously, in the pressure process of pressurization elevator, pressurization steel wire rope to be in powerful tensile stress state for a long time, causes the life-span serious curtailments of pressurization steel wire rope. especially, pressure is added in heavy duty, pressurization steel wire rope is under maximum wire rope tension for a long time, the maximum pull that pressurization steel wire rope can bear will be gradually reduced along with the lengthening of the time of use, and the maximum hoist capacity of the elevator that pressurizes does not reduce over time, namely the maximum hoist capacity of elevator of pressurizeing remains definite value, in this case, it would appear that inharmonious between lifting force and the pulling force of pressurization steel wire rope of pressurization elevator, when the pulling force that the lifting force of the elevator that pressurizes can bear beyond pressurization steel wire rope, pressurization steel wire rope would operate under the environment of over loading, thus cause pressurization steel wire rope life-span than ordinary life serious curtailments, and at present special protective measure be there is no for pressurization steel wire rope.
Summary of the invention
It is an object of the invention to provide the guard method of the pressurization steel wire rope of a kind of piling machinery, provide protection for pressurization steel wire rope, can effectively extend the service life of pressurization steel wire rope.
The present invention provides the guard method of the pressurization steel wire rope of a kind of piling machinery; this piling machinery includes controller, pressurization steel wire rope, pressurization elevator, compression motor and unit head; this compression motor is used for driving this pressurization elevator; this compression motor is automatically controlled variable displacement motor and has automatically controlled stroking mechanism; this controller is connected with this automatically controlled stroking mechanism; this pressurization steel wire rope is around being located on this pressurization elevator and this unit head; this unit head is pressurizeed by this pressurization elevator by this pressurization steel wire rope, and this guard method includes:
Obtain the current net cycle time of this pressurization steel wire rope;
Current net cycle time according to this pressurization steel wire rope, it is thus achieved that this pressurization steel wire rope is at the pulling force that currently can bear;
According to this pressurization steel wire rope at the pulling force that currently can bear, it is thus achieved that this automatically controlled stroking mechanism is at the electric current of currently permitted input; And
According to this automatically controlled stroking mechanism electric current in currently permitted input, control the input operating current to this automatically controlled stroking mechanism lower than this automatically controlled stroking mechanism electric current in currently permitted input.
Further, the step of the current net cycle time obtaining this pressurization steel wire rope includes:
Preset memory in this controller;
Working time during by every for this pressurization steel wire rope task carries out adding up and be stored in this memorizer; And
Data are read to obtain the current net cycle time of this pressurization steel wire rope from this memorizer.
Further, the current net cycle time according to this pressurization steel wire rope, it is thus achieved that this pressurization steel wire rope includes in the step of the pulling force that currently can bear:
Presetting a data base in this controller, wherein this data base describes pulling force that this pressurization steel wire rope can bear and the data corresponding relation between the working time of this pressurization steel wire rope; And
Inquiring about data from this data base to obtain this pressurization steel wire rope at the pulling force that currently can bear, this pressurization steel wire rope is corresponding with the current net cycle time of this pressurization steel wire rope at the pulling force that currently can bear.
Further, according to this pressurization steel wire rope at the pulling force that currently can bear, it is thus achieved that this automatically controlled stroking mechanism includes in the step of the electric current of currently permitted input:
First calculate this compression motor in currently permitted discharge capacity according to this pressurization steel wire rope at the pulling force that currently can bear, and calculate this automatically controlled stroking mechanism electric current in currently permitted input according to this compression motor again in currently permitted discharge capacity.
Further, also include the stress being detected this pressurization steel wire rope by pressure transducer, and measured value and this pressurization steel wire rope of this pressure transducer are displayed at the value of thrust that currently can bear.
The present invention also provides for the guard method of the pressurization steel wire rope of another kind of piling machinery; this piling machinery includes controller, pressurization steel wire rope, pressurization elevator, compression motor and unit head; this compression motor is used for driving this pressurization elevator; this compression motor is fixed displacement motor; the oil-in of this compression motor is connected to automatically controlled proportional pressure control valve; this controller is connected with this automatically controlled proportional pressure control valve; this pressurization steel wire rope is around being located on this pressurization elevator and this unit head; this unit head is pressurizeed by this pressurization elevator by this pressurization steel wire rope, and this guard method includes:
Obtain the current net cycle time of this pressurization steel wire rope;
Current net cycle time according to this pressurization steel wire rope, it is thus achieved that this pressurization steel wire rope is at the pulling force that currently can bear;
According to this pressurization steel wire rope at the pulling force that currently can bear, it is thus achieved that this automatically controlled proportional pressure control valve is at the electric current of currently permitted input; And
According to this automatically controlled proportional pressure control valve electric current in currently permitted input, control the input operating current to this automatically controlled proportional pressure control valve lower than this automatically controlled proportional pressure control valve electric current in currently permitted input.
Further, the step of the current net cycle time obtaining this pressurization steel wire rope includes:
Preset memory in this controller;
Working time during by every for this pressurization steel wire rope task carries out adding up and be stored in this memorizer; And
Data are read to obtain the current net cycle time of this pressurization steel wire rope from this memorizer.
Further, the current net cycle time according to this pressurization steel wire rope, it is thus achieved that this pressurization steel wire rope includes in the step of the pulling force that currently can bear:
Presetting a data base in this controller, wherein this data base describes pulling force that this pressurization steel wire rope can bear and the data corresponding relation between the working time of this pressurization steel wire rope; And
Inquiring about data from this data base to obtain this pressurization steel wire rope at the pulling force that currently can bear, this pressurization steel wire rope is corresponding with the current net cycle time of this pressurization steel wire rope at the pulling force that currently can bear.
Further, according to this pressurization steel wire rope at the pulling force that currently can bear, it is thus achieved that this automatically controlled proportional pressure control valve includes in the step of the electric current of currently permitted input:
First calculate this compression motor in currently permitted operating pressure according to this pressurization steel wire rope at the pulling force that currently can bear, and calculate this automatically controlled proportional pressure control valve electric current in currently permitted input according to this compression motor again in currently permitted operating pressure.
Further, also include the stress being detected this pressurization steel wire rope by pressure transducer, and measured value and this pressurization steel wire rope of this pressure transducer are displayed at the value of thrust that currently can bear.
In embodiments of the invention, by controller, the net cycle time of pressurization steel wire rope is carried out monitor in real time, obtain pressurization steel wire rope at the pulling force that currently can bear, the working pulling force of pressurization steel wire rope is regulated in real time again through the discharge capacity or operating pressure that adjust compression motor, make pressurization steel wire rope real work pulling force at any time less than pressurization steel wire rope at the maximum pull that currently can bear, the working pulling force of steel wire rope is achieved intelligentized control method, ensure that pressurization steel wire rope works when less than specified pulling force to greatest extent, effectively protection pressurization steel wire rope, extend the service life of pressurization steel wire rope.
Accompanying drawing explanation
Fig. 1 is the structural representation of piling machinery in the embodiment of the present invention.
Fig. 2 is the structured flowchart of each ingredient of piling machinery in first embodiment of the invention.
Fig. 3 is pressurize in the embodiment of the present invention pulling force that can bear of steel wire rope and the corresponding relation figure between its working time.
Fig. 4 is the corresponding relation figure between discharge capacity and the operating current of stroking mechanism of compression motor in the embodiment of the present invention.
Fig. 5 is the structured flowchart of each ingredient of piling machinery in second embodiment of the invention.
Detailed description of the invention
For further setting forth that the present invention reaches technological means and effect that predetermined goal of the invention is taked, below in conjunction with accompanying drawing and preferred embodiment, to the specific embodiment of the present invention, structure, feature and effect thereof, describe in detail as after.
Fig. 1 is the structural representation of piling machinery in one embodiment of the invention. In the embodiment of the present invention, illustrating for rotary drilling rig for this piling machinery, but be not limited to this, this piling machinery can also be that convolution rig, punching are grabbed rig, spiral Squeezing Soil Pile machine etc. other are needed piling machinery that unit head is pressurizeed.
As shown in Figure 1, rotary drilling rig includes controller 10, pressurization steel wire rope 11, pressurization elevator 12, compression motor 13, unit head 14 and tensioning hydro-cylinder 15, tensioning hydro-cylinder 15 is arranged on mast 17 with pressurization elevator 12, pressurization steel wire rope 11 is laid out by pressurization elevator 12, and after walking around two fixed pulleys 181 being positioned at mast 17 top successively and being positioned at the fixed pulley 182 of mast 17 bottom on unit head 14, unit head 14 is provided with movable pulley 19, pressurization steel wire rope 11 is connected with tensioning hydro-cylinder 15 after walking around movable pulley 19, compression motor 13 is used for driving pressurization elevator 12, unit head 14 is pressurizeed by pressurization elevator 12 by the steel wire rope 11 that pressurizes, unit head 14 is made to move downward along mast 17. controller 10 is such as programmable logic controller (PLC) (ProgrammableLogicController, PLC). tensioning hydro-cylinder 15 is for straining away from one end of pressurization elevator 12 pressurization steel wire rope 11, when there is the inadequate situation of tensioning in the end of the steel wire rope 11 that pressurizes, it is possible to by telescoping, tensioning oil cylinder 15, the end of pressurization steel wire rope 11 is carried out tensioning.
First embodiment
Incorporated by reference to Fig. 2, in the present embodiment, compression motor 13 is for automatically controlled variable displacement motor and has automatically controlled stroking mechanism 131, and controller 10 is connected with the automatically controlled stroking mechanism 131 of compression motor 13, can be realized the adjustment of the discharge capacity Q to compression motor 13 by this automatically controlled stroking mechanism 131. such as, this compression motor 13 can be cam-type axial piston variable displacement motor, this automatically controlled stroking mechanism 131 is main by proportional flow control valve, variable oil cylinder and LVDT (LinearVariableDifferentialTransformer, linear variable difference transformer) composition, the control system piston position by LVDT detection variable oil cylinder, and by changing the operating current of electric magnet in proportional flow control valve, thus changing the spool displacement of valve, change its output flow, also the piston position of variable oil cylinder is just changed, owing between variable oil cylinder and swash plate being mechanical connection, therefore the piston position of variable oil cylinder is changed equal to the inclination angle changing swash plate, namely the discharge capacity Q of variable displacement motor is changed. therefore, by controlling the operating current i inputted to this proportional flow control valve, can realize being regulated the discharge capacity Q of this compression motor 13 by this automatically controlled stroking mechanism 131.
As shown in Figure 2, compression motor 13 drives operating by hydraulic pump 20, and being controlled automatically controlled stroking mechanism 131 to change the discharge capacity Q of compression motor 13 by controller 10, compression motor 13 drives pressurization elevator 12 action, thus driving pressurization steel wire rope 11 to realize the downward pressurization to unit head 14.
Being provided with memorizer 101 in controller 10, memorizer 101 is for the net cycle time of storing pressurized steel wire rope 11, and this net cycle time is summation working time during pressurization steel wire rope 11 every task carrying out adding up. Pressurization steel wire rope 11 every task time working time be the time that unit head 14 is pressurizeed, this working time can pass through add up compression motor 13 from startup until stopping time obtain, it is also possible to add up according to other modes and obtain. Such as, the pressurization steel wire rope 11 detected using pressure transducer 16 is in the working time as the pressurization steel wire rope 11 stress duration. This memorizer 101 is such as flash storage, and the working time of the pressurization every task of steel wire rope 11 is added the General Logistics Department by controller 10, obtains the net cycle time of pressurization steel wire rope 11 and is stored in this memorizer 101.
Data base 102 it is additionally provided with in controller 10; data base 102 describes the data corresponding relation between the working time of the pressurization pulling force that can bear of steel wire rope 11 and pressurization steel wire rope 11; as shown in Figure 2; the pulling force that can bear of pressurization steel wire rope 11 reduces along with the increase of working time; the present invention is by controlling the pressurization steel wire rope 11 suffered pulling force in pressure process all the time less than its pulling force that currently can bear, to reach the purpose of protection pressurization steel wire rope 11.
Hereinafter each step of the guard method of the pressurization steel wire rope of the present embodiment is described in detail as follows:
First, controller 10 obtains the current net cycle time of pressurization steel wire rope 11.
Specifically, working time when controller 10 is by pressurization steel wire rope 11 every task carries out adding up and be stored in memorizer 101, and controller 10 reads data from memorizer 101 can obtain the current net cycle time of pressurization steel wire rope 11.
Then, the controller 10 current net cycle time according to pressurization steel wire rope 11, it is thus achieved that pressurization steel wire rope 11 is at the pulling force that currently can bear.
Specifically, the controller 10 current net cycle time according to pressurization steel wire rope 11, pressurization steel wire rope 11 can be obtained at the pulling force that currently can bear by inquiring about data base 102, and the steel wire rope 11 that pressurizes is corresponding one by one with the current net cycle time of pressurization steel wire rope 11 at the pulling force that currently can bear. As it is shown on figure 3, when the current net cycle time of the steel wire rope 11 that pressurizes is t, pressurization steel wire rope 11 is f at the pulling force that currently can bear.
Then, controller 10 according to pressurization steel wire rope 11 at the pulling force that currently can bear, it is thus achieved that the automatically controlled stroking mechanism 131 of this compression motor 13 is at the electric current of currently permitted input.
Controller 10 first calculates compression motor 13 in currently permitted discharge capacity according to pressurization steel wire rope 11 at the pulling force that currently can bear, and calculates the automatically controlled stroking mechanism 131 electric current in currently permitted input of compression motor 13 again in currently permitted discharge capacity according to compression motor 13. specifically, the torque T of compression motor 13 is multiplied by the radius r of pressurization elevator 12 equal to the current suffered tensile force f of pressurization steel wire rope 11, i.e. T=F*r, simultaneously, the torque T of compression motor 13 depends on again the discharge capacity Q of compression motor 13, the product of operating pressure P and the constant factor k three of compression motor 13, i.e. T=Q*P*k, and the operating pressure P of compression motor 13 is determined by live load, under the premise that operating mode is certain, operating pressure P is definite value, therefore, discharge capacity Q=(F*r)/(P*k) of compression motor 13, if taking F=f, namely calculating is substituted into the current suffered tensile force f of steel wire rope 11 that pressurizes equal to its maximum pull f that can bear this moment, can calculate compression motor 13 at currently permitted maximum pump discharge is: Qmax=(f*r)/(P*k).And also as noted above, the discharge capacity Q of compression motor 13 can be adjusted by automatically controlled stroking mechanism 131, input to the operating current i of electric magnet in proportional flow control valve by changing, the adjustment of the discharge capacity Q of compression motor 13 can be realized, and between the operating current i and the discharge capacity Q of compression motor 13 of electric magnet, there is one-to-one relationship (as shown in Figure 4), therefore, controller 10 according to compression motor 13 at currently permitted maximum pump discharge QmaxProportional flow control valve can be calculated in the automatically controlled stroking mechanism 131 of compression motor 13 at the maximum current i of currently permitted inputmax。
Finally, controller 10 is according to electric current in currently permitted input of the automatically controlled stroking mechanism 131 of compression motor 13, control the input operating current to the automatically controlled stroking mechanism 131 of compression motor 13 lower than this automatically controlled stroking mechanism 131 electric current in currently permitted input, namely control the input real work electric current i to proportional flow control valve lower than the proportional flow control valve maximum current i in currently permitted inputmax, the actual displacement Q of such compression motor 13 is also lower than it at currently permitted maximum pump discharge Qmax, so that pressurization steel wire rope 11 at current suffered actual tensile force f less than it at the maximum pull f that currently can bear. That is; along with the working time of pressurization steel wire rope 11 extends; the maximum pull f that pressurization steel wire rope 11 can bear will be gradually lowered (Fig. 2); but the present embodiment is by controlling the input operating current i to automatically controlled stroking mechanism 131; regulate and control the discharge capacity Q of compression motor 13 in real time; ensure that the actual tensile force f suffered by pressurization steel wire rope 11 is at any time is respectively less than it at the maximum pull f that currently can bear; there is provided effective protection for pressurization steel wire rope 11, can effectively extend the service life of pressurization steel wire rope 11.
Further, tensioning hydro-cylinder 15 is also equipped with pressure transducer 16, controller 10 detects the hydraulic oil pressure force value of tensioning hydro-cylinder 15 by pressure transducer 16, and the stress value of tensioning hydro-cylinder 15 is calculated according to the lifting surface area of tensioning hydro-cylinder 15, this stress value is equal to the working pulling force of pressurization steel wire rope 11, the result that operator can pass through the detection of this pressure transducer 16 is obtained is observed, to judge the controller 10 control situation to the working pulling force of pressurization steel wire rope 11, also the measured value of pressure transducer 16 and pressurization steel wire rope 11 can be displayed at the value of thrust that currently can bear, for operator's reference.
Second embodiment
Incorporated by reference to Fig. 5, in the present embodiment, compression motor 13 is fixed displacement motor, the oil-in of compression motor 13 is connected to automatically controlled proportional pressure control valve 132, controller 10 is connected with automatically controlled proportional pressure control valve 132, automatically controlled proportional pressure control valve 132, for controlling the operating pressure P of compression motor 13, can realize the adjustment of the operating pressure to compression motor 13 by this automatically controlled proportional pressure control valve 132. Specifically, by controlling the operating current i inputted to this automatically controlled proportional pressure control valve 132, can realize being regulated the operating pressure P of this compression motor 13 by this automatically controlled proportional pressure control valve 132.
As shown in Figure 5, compression motor 13 drives operating by hydraulic pump 20, and being controlled automatically controlled proportional pressure control valve 132 to change the operating pressure P of compression motor 13 by controller 10, compression motor 13 drives pressurization elevator 12 action, thus driving pressurization steel wire rope 11 to realize the downward pressurization to unit head 14.
Hereinafter each step of the guard method of the pressurization steel wire rope of the present embodiment is illustrated as follows:
First, controller 10 obtains the current net cycle time of pressurization steel wire rope 11.This step is identical with first embodiment, does not repeat them here.
Then, the controller 10 current net cycle time according to pressurization steel wire rope 11, it is thus achieved that pressurization steel wire rope 11 is at the pulling force that currently can bear. This step is identical with first embodiment, does not repeat them here.
Then, controller 10 according to pressurization steel wire rope 11 at the pulling force that currently can bear, it is thus achieved that this automatically controlled proportional pressure control valve 132 is at the electric current of currently permitted input.
Controller 10 first calculates compression motor 13 in currently permitted operating pressure according to pressurization steel wire rope 11 at the pulling force that currently can bear, and calculates the automatically controlled proportional pressure control valve 132 electric current in currently permitted input according to compression motor 13 again in currently permitted operating pressure. Specifically, the torque T of compression motor 13 is multiplied by the radius r of pressurization elevator 12 equal to the current suffered tensile force f of pressurization steel wire rope 11, i.e. T=F*r, simultaneously, the torque T of compression motor 13 depends on again the product of operating pressure P and the constant factor k three of the discharge capacity Q of compression motor 13, compression motor 13, i.e. T=Q*P*k, and is now fixed displacement motor due to compression motor 13, its discharge capacity Q is definite value, therefore regulates the torque T of compression motor 13 only by the operating pressure P regulating compression motor 13. Operating pressure P=(F*r)/(Q*k) according to compression motor 13, if taking F=f, namely substituting into calculating with the current suffered tensile force f of steel wire rope 11 that pressurizes equal to its maximum pull f that can bear this moment, can calculate compression motor 13 at currently permitted maximum working pressure (MWP) is: Pmax=(f*r)/(Q*k). And the operating pressure P of compression motor 13 can be adjusted by automatically controlled proportional pressure control valve 132, by changing the operating current i of electric magnet in input extremely automatically controlled proportional pressure control valve 132, the adjustment of the operating pressure P of compression motor 13 can be realized, and between the operating current i and the operating pressure P of compression motor 13 of electric magnet, there is one-to-one relationship, therefore, controller 10 according to compression motor 13 at currently permitted maximum working pressure (MWP) PmaxThe automatically controlled proportional pressure control valve 132 maximum current i in currently permitted input can be calculatedmax。
Finally, controller 10 is according to the automatically controlled proportional pressure control valve 132 electric current in currently permitted input, control the input operating current to automatically controlled proportional pressure control valve 132 lower than this automatically controlled proportional pressure control valve 132 electric current in currently permitted input, namely control the input real work electric current i to automatically controlled proportional pressure control valve 132 lower than the automatically controlled proportional pressure control valve 132 maximum current i in currently permitted inputmax, the actual working pressure P of such compression motor 13 is also lower than it at currently permitted maximum working pressure (MWP) Pmax, so that pressurization steel wire rope 11 at current suffered actual tensile force f less than it at the maximum pull f that currently can bear. That is; along with the working time of pressurization steel wire rope 11 extends; the maximum pull f that pressurization steel wire rope 11 can bear will be gradually lowered (Fig. 2); but the present embodiment is by controlling the input operating current i to automatically controlled proportional pressure control valve 132; regulate and control the operating pressure P of compression motor 13 in real time; ensure that the actual tensile force f suffered by pressurization steel wire rope 11 is at any time is respectively less than it at the maximum pull f that currently can bear; there is provided effective protection for pressurization steel wire rope 11, can effectively extend the service life of pressurization steel wire rope 11.
More contents about the second embodiment may refer to above-mentioned first embodiment, does not repeat them here.
In the embodiment of the present invention, by controller, the net cycle time of pressurization steel wire rope is carried out monitor in real time, obtain pressurization steel wire rope at the pulling force that currently can bear, the working pulling force of pressurization steel wire rope is regulated in real time again through the discharge capacity or operating pressure that adjust compression motor, make pressurization steel wire rope real work pulling force at any time less than pressurization steel wire rope at the maximum pull that currently can bear, the working pulling force of steel wire rope is achieved intelligentized control method, ensure that pressurization steel wire rope works when less than specified pulling force to greatest extent, effectively protection pressurization steel wire rope, extend the service life of pressurization steel wire rope.
The above, it it is only presently preferred embodiments of the present invention, not the present invention is done any pro forma restriction, although the present invention is disclosed above with preferred embodiment, but it is not limited to the present invention, any those skilled in the art, without departing within the scope of technical solution of the present invention, when the technology contents of available the disclosure above makes a little change or is modified to the Equivalent embodiments of equivalent variations, in every case it is without departing from technical solution of the present invention content, according to any simple modification that above example is made by the technical spirit of the present invention, equivalent variations and modification, all still fall within the scope of technical solution of the present invention.
Claims (8)
1. the guard method of the pressurization steel wire rope of a piling machinery; this piling machinery includes controller, pressurization steel wire rope, pressurization elevator, compression motor and unit head; this compression motor is used for driving this pressurization elevator; this compression motor is automatically controlled variable displacement motor and has automatically controlled stroking mechanism; this controller is connected with this automatically controlled stroking mechanism; this pressurization steel wire rope is around being located on this pressurization elevator and this unit head; this unit head is pressurizeed by this pressurization elevator by this pressurization steel wire rope; it is characterized in that, this guard method includes:
Obtain the current net cycle time of this pressurization steel wire rope;
Current net cycle time according to this pressurization steel wire rope, obtain this pressurization steel wire rope at the pulling force that currently can bear, including: presetting a data base in this controller, wherein this data base describes pulling force that this pressurization steel wire rope can bear and the data corresponding relation between the working time of this pressurization steel wire rope; Inquiring about data from this data base to obtain this pressurization steel wire rope at the pulling force that currently can bear, this pressurization steel wire rope is corresponding with the current net cycle time of this pressurization steel wire rope at the pulling force that currently can bear;
According to this pressurization steel wire rope at the pulling force that currently can bear, it is thus achieved that this automatically controlled stroking mechanism is at the electric current of currently permitted input; And
According to this automatically controlled stroking mechanism electric current in currently permitted input, control the input operating current to this automatically controlled stroking mechanism lower than this automatically controlled stroking mechanism electric current in currently permitted input.
2. guard method as claimed in claim 1, it is characterised in that: the step of the current net cycle time obtaining this pressurization steel wire rope includes:
Preset memory in this controller;
Working time during by every for this pressurization steel wire rope task carries out adding up and be stored in this memorizer; And
Data are read to obtain the current net cycle time of this pressurization steel wire rope from this memorizer.
3. guard method as claimed in claim 1, it is characterised in that: according to this pressurization steel wire rope at the pulling force that currently can bear, it is thus achieved that this automatically controlled stroking mechanism includes in the step of the electric current of currently permitted input:
First calculate this compression motor in currently permitted discharge capacity according to this pressurization steel wire rope at the pulling force that currently can bear, and calculate this automatically controlled stroking mechanism electric current in currently permitted input according to this compression motor again in currently permitted discharge capacity.
4. guard method as claimed in claim 1, it is characterised in that: also include the stress being detected this pressurization steel wire rope by pressure transducer, and measured value and this pressurization steel wire rope of this pressure transducer are displayed at the value of thrust that currently can bear.
5. the guard method of the pressurization steel wire rope of a piling machinery; this piling machinery includes controller, pressurization steel wire rope, pressurization elevator, compression motor and unit head; this compression motor is used for driving this pressurization elevator; this compression motor is fixed displacement motor; the oil-in of this compression motor is connected to automatically controlled proportional pressure control valve; this controller is connected with this automatically controlled proportional pressure control valve; this pressurization steel wire rope is around being located on this pressurization elevator and this unit head; this unit head is pressurizeed by this pressurization elevator by this pressurization steel wire rope; it is characterized in that, this guard method includes:
Obtain the current net cycle time of this pressurization steel wire rope;
Current net cycle time according to this pressurization steel wire rope, obtain this pressurization steel wire rope at the pulling force that currently can bear, including: presetting a data base in this controller, wherein this data base describes pulling force that this pressurization steel wire rope can bear and the data corresponding relation between the working time of this pressurization steel wire rope; Inquiring about data from this data base to obtain this pressurization steel wire rope at the pulling force that currently can bear, this pressurization steel wire rope is corresponding with the current net cycle time of this pressurization steel wire rope at the pulling force that currently can bear;
According to this pressurization steel wire rope at the pulling force that currently can bear, it is thus achieved that this automatically controlled proportional pressure control valve is at the electric current of currently permitted input; And
According to this automatically controlled proportional pressure control valve electric current in currently permitted input, control the input operating current to this automatically controlled proportional pressure control valve lower than this automatically controlled proportional pressure control valve electric current in currently permitted input.
6. guard method as claimed in claim 5, it is characterised in that: the step of the current net cycle time obtaining this pressurization steel wire rope includes:
Preset memory in this controller;
Working time during by every for this pressurization steel wire rope task carries out adding up and be stored in this memorizer; And
Data are read to obtain the current net cycle time of this pressurization steel wire rope from this memorizer.
7. guard method as claimed in claim 5, it is characterised in that: according to this pressurization steel wire rope at the pulling force that currently can bear, it is thus achieved that this automatically controlled proportional pressure control valve includes in the step of the electric current of currently permitted input:
First calculate this compression motor in currently permitted operating pressure according to this pressurization steel wire rope at the pulling force that currently can bear, and calculate this automatically controlled proportional pressure control valve electric current in currently permitted input according to this compression motor again in currently permitted operating pressure.
8. guard method as claimed in claim 5, it is characterised in that: also include the stress being detected this pressurization steel wire rope by pressure transducer, and measured value and this pressurization steel wire rope of this pressure transducer are displayed at the value of thrust that currently can bear.
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| CN201410478023.3A CN104355256B (en) | 2014-09-18 | 2014-09-18 | The guard method of the pressurization steel wire rope of piling machinery |
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| CN201410478023.3A CN104355256B (en) | 2014-09-18 | 2014-09-18 | The guard method of the pressurization steel wire rope of piling machinery |
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| CN104355256A CN104355256A (en) | 2015-02-18 |
| CN104355256B true CN104355256B (en) | 2016-06-15 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113998609B (en) * | 2021-10-22 | 2023-05-09 | 中建三局集团有限公司 | Steel frame lifting machine for hoisting plates |
| CN114412385B (en) * | 2022-01-25 | 2023-01-24 | 北京三一智造科技有限公司 | Pressure device and rotary drilling rig |
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| US4434616A (en) * | 1981-10-23 | 1984-03-06 | Fmc Corporation | Hydraulic winch speed control with pressure-responsive override |
| CN201056982Y (en) * | 2007-07-10 | 2008-05-07 | 北京市三一重机有限公司 | Compression device of hoist steel wire rope |
| CN201802318U (en) * | 2010-09-17 | 2011-04-20 | 方圆集团海阳起重机械有限公司 | Lifting and pressurizing device for screw-threaded pile machine |
| CN103466491A (en) * | 2013-09-18 | 2013-12-25 | 山河智能装备股份有限公司 | Pressurization control loop and method of piling machinery power head |
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2014
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4434616A (en) * | 1981-10-23 | 1984-03-06 | Fmc Corporation | Hydraulic winch speed control with pressure-responsive override |
| CN201056982Y (en) * | 2007-07-10 | 2008-05-07 | 北京市三一重机有限公司 | Compression device of hoist steel wire rope |
| CN201802318U (en) * | 2010-09-17 | 2011-04-20 | 方圆集团海阳起重机械有限公司 | Lifting and pressurizing device for screw-threaded pile machine |
| CN103466491A (en) * | 2013-09-18 | 2013-12-25 | 山河智能装备股份有限公司 | Pressurization control loop and method of piling machinery power head |
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| CN104355256A (en) | 2015-02-18 |
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