CN203754266U - Mast rise and fall control system as well as lifting device and crane - Google Patents

Abstract

The utility model relates to the technical field of cranes, and discloses a mast rise and fall control system, a lifting device and a crane for improving the operation efficiency and safety of rise and fall of an operation mast. The mast rise and fall control system comprises a first overflow valve, a first normally closed electromagnetic valve, a counter balance valve and a control device, wherein the first overflow valve is arranged on a rising high-pressure oil circuit of a winch motor; the first normally closed electromagnetic valve and the counter balance valve are arranged on a closed oil circuit between two oil openings of the winch motor; and the control device is respectively in signal connection with a first proportional reversing valve, a second proportional reversing valve and the first normally closed electromagnetic valve, is used for outputting a first current control signal for controlling a winch to withdraw a rope to the first proportional reversing valve when receiving the mast rise command information and a second current control signal for controlling the rise of an amplitude variation oil cylinder to the second proportional reversing valve, is used for controlling the first normally closed electromagnetic valve to open, and outputting a third current control signal for controlling the fall of the amplitude variation oil cylinder to the second proportional reversing valve.

Description

Mast rising and dropping control system and super lifting device and hoisting crane

Technical field

The utility model relates to hoisting crane technical field, particularly relates to a kind of mast rising and dropping control system, a kind of super lifting device and a kind of hoisting crane.

Background technology

Telescopic crane, with its flexible operation, with to hanging, with hanging with the advantage of walking, is widely used in engineer operation.Along with the large scale development of construction project, also there is higher requirement for the property indices of Telescopic crane, such as lifting tonnage, operating altitude and amplitude etc.As everyone knows, improve the performance figure such as lifting tonnage, operating altitude and amplitude, the brachium of jib and deadweight can increase thereupon, on goliath, the weight of jib often accounts for the more than 23% of complete machine weight, thing followed problem is: the increase that hoisting crane brachium, arm are heavy, and the stressing conditions when making jib hang loads is more and more severe, and the amount of deflection (be vertical amount of deflection and the transverse deflection of jib) of jib in luffing plane and plane of rotation is increasing.In order to improve the force-bearing situation of jib, avoid jib amount of deflection excessive, on some goliaths, set up super lifting device.

As shown in Fig. 1 a and Fig. 1 b, a kind of keystone configuration of super lifting device of Telescopic crane comprises: mast 11, drag-line 12, amplitude oil cylinder 13 and elevator 14, and wherein, the fixed end of mast 11 and the basic arm of jib 15 are hinged; The two ends of drag-line 12 are connected with the root of basic arm 15 and the movable end of mast 11 respectively; The cylinder barrel end of amplitude oil cylinder 13 and cylinder rod end are hinged with mast 11 and basic arm 15 respectively; Elevator 14 is arranged on the position of mast 11 near fixed end, and the steel rope 16 that elevator 14 is discharged is walked around after pulley system 17 and drawn and be back to mast 11.In the time that needs lift weight, mast 11 can be extremely substantially vertical with basic arm 15 at luffing rotation with in surface around its fixed end under the promotion of amplitude oil cylinder 13.Because steel rope 16 applies the first pulling force between telescopic boom 10 and the movable end of mast 11, and this first pulling force can act on the moment of flexure on jib by weight equalizer, therefore, compare the hoisting crane without super lifting device, the amount of deflection of jib significantly reduces, and in like manner, drag-line 12 applies the second pulling force between the root of basic arm 15 and the movable end of mast 11, alleviate the amount of deflection of mast 11, improved the limit of above-mentioned the first pulling force.Therefore, super lifting device can significantly change the force-bearing situation of jib, is conducive to the performance figure such as the tonnage that hoists, operating altitude and the amplitude of lift crane.

Rise and fall in process at mast, row's rope amount of elevator is to change in the moment: rise in the process of mode of operation (being state shown in Fig. 1 a) on 11, mast, row's rope amount of elevator constantly reduces; Drop in the process of retracted state at mast 11, row's rope amount of elevator constantly increases.For avoiding occurring slack rope or disorder cable phenomenon (may cause the Peril Incidents such as folding arm), need to make steel rope keep certain pulling force.In prior art, while hoisting mast, first operate the mast certain angle that hoists, then stop mast action, regain unnecessary steel rope steel rope is tightened; Operation mast continues the certain angle that hoists, and then stops mast action, again regains unnecessary steel rope; So operation repeatedly rises to mode of operation until mast rises.Process when landing mast in contrast, first emit the steel rope of certain surplus, operation mast landing certain angle, then stop mast action, again emit the steel rope of certain surplus, operation mast continues landing certain angle, then stops mast action, and so operation is repeatedly until mast drop to retracted state.

The defect that prior art exists is, in rising and falling process, operation mast needs to regulate frequently the length of steel rope, operation is inconvenience very, have a strong impact on operating efficiency, if operator operates mal or not in time, very easily cause the damage of steel rope, hoist motor or mast, even cause safety misadventure.Especially, the steel rope multiplying power of super lifting device has developed into 2 multiplying power to 4 multiplying powers at present, and the folding and unfolding amount of rope length is larger, and this technical matters is particularly outstanding especially.

Utility model content

The utility model embodiment provides a kind of mast rising and dropping control system, a kind of super lifting device and a kind of hoisting crane, operating efficiency and the safety of rising and falling in order to improve operation mast.

The mast rising and dropping control system that the utility model embodiment provides, comprising:

Hoist motor and the first proportional reversing valve moving for controlling hoist motor;

Amplitude oil cylinder and the second proportional reversing valve moving for controlling amplitude oil cylinder;

The first by pass valve, is arranged at hoisting on high-pressure oil passage of hoist motor, and when the settling pressure of described the first by pass valve hoists according to the mast of setting, lineoutofservice signal pull obtains;

The first normally closed solenoid valve and back pressure valve, be arranged in the closed circuit between two hydraulic fluid ports of hoist motor, the setting pressure of described back pressure valve according to set mast landing time lineoutofservice signal pull obtain;

Control setup, be connected with the first proportional reversing valve, the second proportional reversing valve and the first normally closed solenoid valve signal respectively, for in the time receiving that mast hoists command information, control the first current controling signal of elevator rope closing to the first proportional reversing valve output, and control to the second proportional reversing valve output the second current controling signal that amplitude oil cylinder hoists, wherein, the time of exporting the first current controling signal is not later than the time of output the second current controling signal, and the current value of the first current controling signal is greater than the current value of the second current controling signal; In the time receiving mast landing command information, control the first normally closed solenoid valve and open, and control to the second proportional reversing valve output the 3rd current controling signal that amplitude oil cylinder falls after rise.

The mast rising and dropping control system of the utility model embodiment, no matter be to hoist in process at mast, or in mast landing process, hoist motor and amplitude oil cylinder all can coordinations, steel rope can remain certain pulling force when being involved in reel or discharging reel, there will not be slack rope, disorder cable phenomenon, this process, without the length of the frequent manual regulation steel rope of operating personal, has improved operating efficiency and safety that operation mast rises and falls greatly.

Preferably, mast rising and dropping control system also comprises: pressure-detecting device, the operation pressure of back pressure valve when the operation pressure of the first by pass valve and mast land while hoisting for detection of mast;

Described control setup, is further connected with described pressure-detecting device signal, in the time that the operation pressure of the first by pass valve and the difference of settling pressure exceed the first range of pressure of setting, and rise and fall hydraulic efficiency pressure system export the first prompt messages of locking mast; And in the time that the operation pressure of back pressure valve and the difference of setting pressure exceed the second range of pressure of setting, rise and fall hydraulic efficiency pressure system export the second prompt messages of locking mast.

This embodiment can occur when abnormal at system pressure, locks in time rise and fall hydraulic efficiency pressure system export corresponding prompt messages of mast, and alert is overhauled equipment, has further improved the safety that operation mast rises and falls.

Preferably, mast rising and dropping control system also comprises: second normally closed solenoid valve of connecting with the first by pass valve and arranging, and the second by pass valve being arranged in parallel with the first by pass valve and the second normally closed solenoid valve, the settling pressure of described the second by pass valve is greater than the settling pressure of described the first by pass valve;

Described control setup, is further connected with described the second normally closed solenoid valve signal, in the time receiving that mast hoists command information, controls the second normally closed solenoid valve and opens.

The second by pass valve can be used for independent rolling and raises the system pressure control under operating mode, and in the time that the independent rolling of needs is raised, the second normally closed solenoid valve is in closed condition, and the first by pass valve is not worked, and the oil pressure relief of system is determined by the second by pass valve; In the time that mast hoists, the second normally closed solenoid valve is opened, and the oil pressure relief of system is determined by the first by pass valve.This scheme has been enriched the rise and fall control policy of control system of elevator.

Preferably, described the first by pass valve is proportional pressure control valve, and described back pressure valve is ratio back pressure valve, and described control system also comprises the coder for detection of the current winding number of plies of hoisting rope;

Described control setup, is further connected with described proportional pressure control valve, ratio back pressure valve and code device signal, for according to the mast of setting while hoisting the current winding number of plies of lineoutofservice signal pull and hoisting rope obtain the real-time control electric current of proportional pressure control valve; Export the real-time control electric current of described proportional pressure control valve to proportional pressure control valve, the settling pressure of resize ratio by pass valve; And obtain the real-time control electric current of ratio back pressure valve according to the current winding number of plies of mast when landing lineoutofservice signal pull of setting and hoisting rope; Export the real-time control electric current of described ratio back pressure valve to ratio back pressure valve, the setting pressure of resize ratio back pressure valve.

In this embodiment, when when mast hoists, lineoutofservice signal pull, mast land, the current winding number of plies of lineoutofservice signal pull and hoisting rope can be respectively real-time variable, determine that according to real-time variable the real-time control electric current of proportional pressure control valve and the real-time control electric current of ratio back pressure valve can realize mast and rise and fall in process, different lineoutofservice signal pulls under different change angles, to reach best rope closing or row's rope effect of steel rope, improve the control accuracy that mast rises and falls.

Preferably, mast rising and dropping control system also comprises:

Be arranged at the balance cock of the rodless cavity oil port of amplitude oil cylinder; And/or

Be arranged at respectively the pressure-compensated valve on the import oil circuit of the first proportional reversing valve and the second proportional reversing valve; And/or

Be arranged at the check valve hoisting on high-pressure oil passage of hoist motor; And/or

Be arranged at the Fill valve between the oil return circuit of hydraulic efficiency pressure system and the landing oil inlet of hoist motor.

Balance cock can make the action of rising and falling of amplitude oil cylinder more steady; The delivery rate ratio that pressure-compensated valve can be controlled change-over valve is stable; Check valve can be realized the hoist one-way conduction of high-pressure oil passage of hoist motor; Fill valve can carry out repairing to prevent vacuum for hoist motor.

The utility model embodiment also provides a kind of super lifting device, comprises the mast rising and dropping control system of above-mentioned arbitrary embodiment.

The utility model embodiment also provides a kind of hoisting crane, comprises the super lifting device described in above-described embodiment.

Brief description of the drawings

Fig. 1 a is that mast rises and rises to working state schematic representation;

Fig. 1 b is that mast drop to retracted state schematic diagram;

Fig. 2 is the mast rising and dropping control system electrical structural representation of the utility model the first embodiment;

Fig. 3 a is the utility model the second embodiment middle mast hydraulic system structure schematic diagram that rises and falls;

Fig. 3 b is the utility model the 3rd embodiment middle mast hydraulic system structure schematic diagram that rises and falls;

Fig. 3 c is the utility model the 4th embodiment middle mast hydraulic system structure schematic diagram that rises and falls;

Fig. 4 is the utility model one embodiment middle mast rising and dropping control method flow schematic diagram;

Fig. 5 is the utility model one embodiment middle mast rising and dropping control apparatus structure schematic diagram.

Reference numeral:

10-telescopic boom; 11-mast; 12-drag-line; 13-amplitude oil cylinder; 14-elevator; 15-basic arm;

16-steel rope; 17-pulley system; 18-hoist motor; 19-the first proportional reversing valve;

20-the second proportional reversing valve; 21-the first by pass valve; 22-the first normally closed solenoid valve; 23-back pressure valve;

24-control setup; 25-pressure-detecting device; 26-the second normally closed solenoid valve; 27-the second by pass valve;

28-balance cock; 29-pressure-compensated valve; 30-check valve; 31-Fill valve; 50-the first control convenience;

51-the second control convenience.

Detailed description of the invention

Operating efficiency and the safety of rising and falling in order to improve operation mast, the utility model embodiment provides a kind of mast rising and dropping control system, a kind of super lifting device and a kind of hoisting crane.The mast rising and dropping control system providing, no matter be to hoist in process at mast, or in mast landing process, hoist motor and amplitude oil cylinder all can coordinations, steel rope can remain certain pulling force when being involved in reel or discharging reel, there will not be slack rope, disorder cable phenomenon, this process, without the length of the frequent manual regulation steel rope of operating personal, has improved operating efficiency and safety that operation mast rises and falls greatly.Below with specific embodiment and be described with reference to the accompanying drawings the utility model.

As shown in Figure 2, the mast rising and dropping control system that the utility model embodiment provides, comprising:

Hoist motor 18 and the first proportional reversing valve 19 moving for controlling hoist motor 18;

Amplitude oil cylinder 13 and the second proportional reversing valve 20 moving for controlling amplitude oil cylinder 13;

The first by pass valve 21, is arranged at hoisting on high-pressure oil passage of hoist motor 18, and when the settling pressure of the first by pass valve 21 hoists according to the mast of setting, lineoutofservice signal pull obtains;

The first normally closed solenoid valve 22 and back pressure valve 23, be arranged in the closed circuit between two hydraulic fluid ports of hoist motor 18, the setting pressure of back pressure valve 23 according to set mast landing time lineoutofservice signal pull obtain;

Control setup 24, be connected with the first proportional reversing valve 19, the second proportional reversing valve 20 and the first normally closed solenoid valve 22 signals respectively, for in the time receiving that mast hoists command information, control the first current controling signal of elevator rope closing to the first proportional reversing valve 19 outputs, and control to the second proportional reversing valve 20 outputs the second current controling signal that amplitude oil cylinder 13 hoists, wherein, the time of exporting the first current controling signal is not later than the time of output the second current controling signal, and the current value of the first current controling signal is greater than the current value of the second current controling signal; In the time receiving mast landing command information, control the first normally closed solenoid valve 22 and open, and control to the second proportional reversing valve 20 outputs the 3rd current controling signal that amplitude oil cylinder 13 falls after rise.

The mast rising and dropping control system that the utility model embodiment provides can be applicable in all kinds of hoisting cranes that comprise super lifting device, for example, and Telescopic crane, crawler crane etc.

The particular type of the first proportional reversing valve 19 and the second proportional reversing valve 20 is not limit, can be for example two-position four-way proportional reversing valve, 3-position 4-way proportional reversing valve etc., the first proportional reversing valve 19 is controlled the action of hoist motor 18 by the flow through flow of hydraulic oil and direction of change, with the action that realizes rope closing, puts rope, the second proportional reversing valve 20 is controlled the action of amplitude oil cylinder 13 by changing the flow of hydraulic oil and direction, to realize hoisting and falling after rise of amplitude oil cylinder 13.

The mast of the embodiment hydraulic system structure schematic diagram that rises and falls as shown in Figure 3 a.When the high-pressure oil passage that hoists of hoist motor 18 refers to elevator rope closing; the A1 working hole of the first proportional reversing valve 19 (can and the oil inlet P of hydraulic efficiency pressure system be communicated with) is to the oil circuit between the A mouth (now A mouth is oil inlet) of hoist motor 18; at this oil circuit, the first by pass valve 21 is set; in the time that oil circuit pressure reaches the settling pressure of the first by pass valve 21; the first by pass valve 21 starts the oil return inlet T overflow to hydraulic efficiency pressure system; so that system is protected, prevent overload.The first normally closed solenoid valve 22 is for changing the oil channel structures of system, in the time that mast hoists, the first normally closed solenoid valve 22 is closed (hydraulic oil can not circulate at this), the high-pressure oil passage conducting that hoists of hoist motor 18, the first by pass valve 21 is in running order, and the oil pressure relief of system is determined by the first by pass valve 21; In the time that mast lands, the first normally closed solenoid valve 22 is opened (hydraulic oil can circulate at this), closed circuit conducting between the AB hydraulic fluid port of hoist motor 18, form enclosed short circle, hydraulic oil first proportional reversing valve 19 of no longer flowing through, back pressure valve 23 is in running order, for hoist motor 18 provides back pressure.

The mast of another embodiment hydraulic system structure schematic diagram that rises and falls as shown in Figure 3 b.Hydraulic system structure also comprises: second normally closed solenoid valve 26 of connecting with the first by pass valve 21 and arranging, and the settling pressure of the second by pass valve 27, the second by pass valves 27 that are arranged in parallel with the first by pass valve 21 and the second normally closed solenoid valve 26 is greater than the settling pressure of the first by pass valve 21; Control setup (not shown) is further connected with the second normally closed solenoid valve 26 signals, in the time receiving that mast hoists command information, controls the second normally closed solenoid valve 26 and opens, and makes the first by pass valve 21 in running order.

The second by pass valve 27 can be used for independent rolling and raises under operating mode (for example, when the jib of telehoist is retracted, or when the jib of telehoist has surpassed pretension after stretching, now amplitude oil cylinder attonity) system pressure control, in the time that the independent rolling of needs is raised, the second normally closed solenoid valve 26 is in closed condition (hydraulic oil can not circulate at this), the first by pass valve 21 is not worked, and the oil pressure relief of system is determined by the second by pass valve 27; In the time that mast hoists, the second normally closed solenoid valve 26 is opened (hydraulic oil can circulate at this), and because the settling pressure of the second by pass valve 27 is greater than the settling pressure of the first by pass valve 21, the oil pressure relief of system is determined by the first by pass valve 21.This scheme has been enriched the rise and fall control policy of control system of elevator, can be applicable in the multiclass action control of super lifting device.

Shown in Fig. 3 b, mast rising and dropping control system also comprises: pressure-detecting device 25, the operation pressure of back pressure valve 23 when the operation pressure of the first by pass valve 21 and mast land while hoisting for detection of mast;

Control setup 24, is further connected with pressure-detecting device 25 signals, in the time that first operation pressure of by pass valve 21 and the difference of settling pressure exceed the first range of pressure of setting, and rise and fall hydraulic efficiency pressure system export the first prompt messages of locking mast; And in the time that the operation pressure of back pressure valve 23 and the difference of setting pressure exceed the second range of pressure of setting, rise and fall hydraulic efficiency pressure system export the second prompt messages of locking mast.Wherein, the first range of pressure of setting and the second range of pressure of setting are rule of thumb determined.

In the time that the first by pass valve 21 or back pressure valve 23 break down, the pressure of hydraulic efficiency pressure system may occur extremely, thereby may cause Hydraulic Elements damage or elevator rise and fall uncontrollable, this embodiment can occur when abnormal at system pressure, in time rise and fall hydraulic efficiency pressure system export corresponding prompt messages of locking mast, alert is overhauled equipment, has further improved the safety that operation mast rises and falls.The concrete setting position of pressure-detecting device 25 is not limit, and can design according to the concrete oil channel structures of hydraulic efficiency pressure system.For example, pressure-detecting device can comprise two pressure sensors, is separately positioned in the closed circuit between two hydraulic fluid ports of hoist high-pressure oil passage and hoist motor of hoist motor; Pressure-detecting device 25 can be also a pressure sensor, is arranged on the A mouth place of hoist motor 18, as shown in Figure 3 b.

Shown in Fig. 3 b, mast rising and dropping control system also comprises: the balance cock 28 that is arranged at the rodless cavity oil port of amplitude oil cylinder 13; Be arranged at respectively the pressure-compensated valve 29 on the import oil circuit of the first proportional reversing valve 19 and the second proportional reversing valve 20; Be arranged at the check valve 30 hoisting on high-pressure oil passage of hoist motor 18; Be arranged at the Fill valve 31 between the oil return circuit of hydraulic efficiency pressure system and the landing oil inlet of hoist motor 18 (being the B mouth of hoist motor 18).

Balance cock 28 can make the action of rising and falling of amplitude oil cylinder 13 more steady; The delivery rate ratio that pressure-compensated valve 29 can be controlled change-over valve is stable; Check valve 30 can be realized the hoist one-way conduction of high-pressure oil passage of hoist motor; Fill valve 31 can carry out repairing to prevent vacuum for hoist motor 18.

Taking Fig. 3 b illustrated embodiment as example, mast lift control process is as follows: in the time receiving that mast hoists command information, export the first current controling signal to the first proportional reversing valve 19, electromagnet Y1 is obtained electric, hydraulic oil arrives the A mouth of hoist motor 18 through the A1 mouth of the first proportional reversing valve 19; Meanwhile, the electromagnet Y4 of the second normally closed solenoid valve 26 obtains electric, and the second normally closed solenoid valve 26 is opened, and hoist motor 18 steel rope of pulling back under the pressure control of the first by pass valve 21, makes steel rope be involved in reel; After above action, (can rule of thumb set an interval time, for example 2 seconds), export the second current controling signal to the second proportional reversing valve 20, electromagnet Y3 is obtained electric, hydraulic oil arrives the rodless cavity of amplitude oil cylinder 13 through the A2 mouth of the second proportional reversing valve 20, amplitude oil cylinder 13 hoists.Hoist in process in amplitude oil cylinder 13, the steel rope that connects mast and jib traction place can have the trend that produces surplus gradually, the steel rope and hoist motor 18 has been pulled back under the pressure control of the first by pass valve 21, so unnecessary steel rope can constantly be pulled back and be taken in reel, there will not be slack rope phenomenon.In this process, because the time of output the first current controling signal is not later than the time of exporting the second current controling signal, and the current value of the first current controling signal is greater than the current value (unnecessary flow can overflow back fuel tank by the first by pass valve 21) of the second current controling signal, therefore, the rope closing speed that can ensure hoist motor 18 is greater than the hoist speed of produced steel rope surplus of amplitude oil cylinder 13, lineoutofservice signal pull while making steel rope keep the mast of setting to hoist, in tensioned state.

Hoist in process at mast, when the mast of setting hoists, lineoutofservice signal pull is determined according to correlation experience by operating personal, and the settling pressure of the first by pass valve 21 can according to the mast of setting hoist time lineoutofservice signal pull calculate.When hoisting, first settling pressure of by pass valve 21 and the mast of setting there is following functional relation between lineoutofservice signal pull:

$P_1=\frac{10\mathrm{\π}\·F_1\·[D_0+2d(n-1)]}{i\·V_g\·{\mathrm{\η}}_m\·{\mathrm{\η}}_i}$ Formula (1)

Wherein, P ₁be the settling pressure (bar) of the first by pass valve, F ₁lineoutofservice signal pull (ox) while hoisting for the mast of setting; N is the winding number of plies of hoisting rope; D ₀for the low footpath (millimeter) of winding reel; D is the diameter (millimeter) of steel rope; I is the reduction ratio of hoisting speed reducer; V _gfor the discharge capacity (milliliter/turn) of hoist motor; η _mfor the mechanical-hydraulic efficiency of hoist motor; η _ifor the mechanical efficiency of hoisting speed reducer.

Taking Fig. 3 b illustrated embodiment as example, mast landing control process is as follows:

In the time receiving mast landing command information, the electromagnet Y5 of the first normally closed solenoid valve 22 is obtained electric, control the first normally closed solenoid valve 22 and open, export the 3rd current controling signal to the second proportional reversing valve 20 simultaneously, electromagnet Y2 is obtained electric, amplitude oil cylinder 13 falls.In amplitude oil cylinder 13 dropping process, the steel rope that connects mast and jib traction place is tightened up gradually, because now the first normally closed solenoid valve 22 is opened, closed circuit conducting between the AB mouth of hoist motor 18, form enclosed short circle, hoist motor 18 under the dragging of steel rope from the oil suction of B mouth, the oil extraction of A mouth, the hydraulic oil of discharging is got back to again the B mouth of hoist motor 18 after back pressure valve 23 and the first normally closed solenoid valve 22, in this process, Fill valve 31 carries out repairing constantly to hoist motor 18, to prevent vacuum, in mast landing process, the setting pressure of back pressure valve 23 determines the pulling force size of steel rope.When the mast of setting lands, lineoutofservice signal pull can be pre-determined according to correlation experience by operating personal, has following functional relation when the setting pressure of back pressure valve 23 and the landing of the mast of setting between lineoutofservice signal pull:

$P_2=\frac{10\mathrm{\π}\·F_2\·[D_0+2d(n-1)]}{i\·V_g\·{\mathrm{\η}}_m\·{\mathrm{\η}}_i}$ Formula (2)

Wherein, P ₂for the setting pressure (bar) of back pressure valve, F ₂lineoutofservice signal pull (ox) while landing for the mast of setting, all the other parameter connotation cotypes (1).

Above-mentioned mast rises and falls in process, and the pressure of hydraulic efficiency pressure system can detect by the pressure-detecting device 25 at the A mouth place of hoist motor 18, occurs extremely once system pressure, can lock in time rise and fall hydraulic efficiency pressure system export corresponding prompt messages of mast.

The mast rising and dropping control system of the utility model embodiment, no matter be to hoist in process at mast, or in mast landing process, hoist motor 18 and amplitude oil cylinder 13 all can coordinations, steel rope can remain certain pulling force when being involved in reel or discharging reel, there will not be slack rope, disorder cable phenomenon, this process, without the length of the frequent manual regulation steel rope of operating personal, has improved operating efficiency and safety that operation mast rises and falls greatly.

As shown in Figure 3 c, preferred, the first by pass valve 21 is proportional pressure control valve, and back pressure valve 23 is ratio back pressure valve, and control system also comprises the coder (not shown) for detection of the current winding number of plies of hoisting rope;

Control setup 24, is further connected with proportional pressure control valve, ratio back pressure valve and code device signal, for according to the mast of setting while hoisting the current winding number of plies of lineoutofservice signal pull and hoisting rope obtain the real-time control electric current of proportional pressure control valve; To the real-time control electric current of proportional pressure control valve export ratio by pass valve, the settling pressure of resize ratio by pass valve; And obtain the real-time control electric current of ratio back pressure valve according to the current winding number of plies of mast when landing lineoutofservice signal pull of setting and hoisting rope; To the real-time control electric current of ratio back pressure valve export ratio back pressure valve, the setting pressure of resize ratio back pressure valve.

In this embodiment, when when mast hoists, lineoutofservice signal pull, mast land, the current winding number of plies of lineoutofservice signal pull and hoisting rope can be respectively real-time variable, determine that according to real-time variable the real-time control electric current of proportional pressure control valve and the real-time control electric current of ratio back pressure valve can realize mast and rise and fall in process, different lineoutofservice signal pulls under different change angles, to reach best rope closing or row's rope effect of steel rope, improve the control accuracy that mast rises and falls.

The utility model embodiment also provides a kind of super lifting device, comprises the mast rising and dropping control system of above-mentioned arbitrary embodiment.Hoist motor and amplitude oil cylinder can coordinations, steel rope can remain certain pulling force when being involved in reel or discharging reel, there will not be slack rope, disorder cable phenomenon, mast rises and falls without the length of the frequent manual regulation steel rope of operating personal, has greatly improved operating efficiency and safety that operation mast rises and falls.

The utility model embodiment also provides a kind of hoisting crane, comprises the super lifting device of above-described embodiment, and mast rises and falls and there will not be slack rope, disorder cable phenomenon, and operating efficiency and safety that operation mast rises and falls are higher.The particular type of hoisting crane is not limit, and comprises Telescopic crane etc.

As shown in Figure 4, a kind of mast rising and dropping control method in mast rising and dropping control system that is applied to above-mentioned arbitrary embodiment, comprising:

Step 101, reception mast action command information;

Step 102, in the time receiving that mast hoists command information, control the first current controling signal of elevator rope closing to the first proportional reversing valve output, and control to the second proportional reversing valve output the second current controling signal that amplitude oil cylinder hoists, wherein, the time of exporting the first current controling signal is not later than the time of output the second current controling signal, and the current value of the first current controling signal is greater than the current value of the second current controling signal;

Step 103, in the time receiving mast landing command information, control the first normally closed solenoid valve and open, and control to the second proportional reversing valve output the 3rd current controling signal that amplitude oil cylinder falls after rise.

This control method can make hoist motor and amplitude oil cylinder coordination, steel rope can remain certain pulling force when being involved in reel or discharging reel, there will not be slack rope, disorder cable phenomenon, mast rises and falls without the length of the frequent manual regulation steel rope of operating personal, has greatly improved operating efficiency and safety that operation mast rises and falls.

Preferably, mast rising and dropping control method also comprises:

In the time that the operation pressure of the first by pass valve and the difference of settling pressure exceed the first range of pressure of setting, rise and fall hydraulic efficiency pressure system export the first prompt messages of locking mast; And

In the time that the operation pressure of back pressure valve and the difference of setting pressure exceed the second range of pressure of setting, rise and fall hydraulic efficiency pressure system export the second prompt messages of locking mast.

Preferably, described mast rising and dropping control system also comprises second normally closed solenoid valve of connecting with the first by pass valve and arranging, and the second by pass valve being arranged in parallel with the first by pass valve and the second normally closed solenoid valve, the settling pressure of described the second by pass valve is greater than the settling pressure of described the first by pass valve, and described control method also comprises:

In the time receiving that mast hoists command information, control the second normally closed solenoid valve and open.

Preferably, the first by pass valve is proportional pressure control valve, and back pressure valve is ratio back pressure valve, and control system also comprises that control method also comprises for detection of the coder of the current winding number of plies of hoisting rope:

While hoisting according to the mast of setting, the current winding number of plies of lineoutofservice signal pull and hoisting rope obtains the real-time control electric current of proportional pressure control valve; To the real-time control electric current of proportional pressure control valve export ratio by pass valve, the settling pressure of resize ratio by pass valve; And

While landing according to the mast of setting, the current winding number of plies of lineoutofservice signal pull and hoisting rope obtains the real-time control electric current of ratio back pressure valve; To the real-time control electric current of ratio back pressure valve export ratio back pressure valve, the setting pressure of resize ratio back pressure valve.

In the time that proportional pressure control valve has inverse proportion current curve characteristic, while hoisting according to the mast of setting, the current winding number of plies of lineoutofservice signal pull and hoisting rope obtains the real-time control electric current of proportional pressure control valve, specifically by following functional relation:

$I_1=\frac{(P_{\max 1}-\frac{10\mathrm{\π}\·F_1\·[D_0+2d(n-1)]}{i\·V_g\·{\mathrm{\η}}_m\·{\mathrm{\η}}_i})\·I_{\max 1}}{p_{\max 1}-P_{\min 1}}$

In the time that proportional pressure control valve has direct proportion current curve characteristic, while hoisting according to the mast of setting, the current winding number of plies of lineoutofservice signal pull and hoisting rope obtains the real-time control electric current of proportional pressure control valve, specifically by following functional relation:

$I_1=I_{\min 1}+\frac{\frac{10\mathrm{\π}\·F_1\·[D_0+2d(n-1)]}{i\·V_g\·{\mathrm{\η}}_m\·{\mathrm{\η}}_i}\·(I_{\max 1}-I_{\min 1})}{p_{\max 1}}$

In the time that ratio back pressure valve has inverse proportion current curve characteristic, while landing according to the mast of setting, the current winding number of plies of lineoutofservice signal pull and hoisting rope obtains the real-time control electric current of ratio back pressure valve, specifically by following functional relation:

$I_2=\frac{(P_{\max 2}-\frac{10\mathrm{\π}\·F_2\·[D_0+2d(n-1)]}{i\·V_g\·{\mathrm{\η}}_m\·{\mathrm{\η}}_i})\·I_{\max 2}}{p_{\max 2}-P_{\min 2}}$

In the time that ratio back pressure valve has direct proportion current curve characteristic, while landing according to the mast of setting, the current winding number of plies of lineoutofservice signal pull and hoisting rope obtains the real-time control electric current of ratio back pressure valve, specifically by following functional relation:

$I_2=I_{\min 2}+\frac{\frac{10\mathrm{\π}\·F_2\·[D_0+2d(n-1)]}{i\·V_g\·{\mathrm{\η}}_m\·{\mathrm{\η}}_i}\·(I_{\max 2}-I_{\min 2})}{p_{\max 2}}$

Wherein, F ₁lineoutofservice signal pull while hoisting for the mast of setting; F ₂lineoutofservice signal pull while landing for the mast of setting; N is the current winding number of plies of hoisting rope; D ₀for the low footpath of winding reel; D is the diameter of steel rope; I is the reduction ratio of hoisting speed reducer; V _gfor the discharge capacity of hoist motor; η _mfor the mechanical-hydraulic efficiency of hoist motor; η _ifor the mechanical efficiency of hoisting speed reducer; I ₁for the real-time control electric current of proportional pressure control valve, I ₂for the real-time control electric current of ratio back pressure valve; I _max1for the maximum controlling current of proportional pressure control valve; I _max2for the maximum controlling current of ratio back pressure valve; P _max1for the maximum settling pressure of proportional pressure control valve; P _max2for the maximum set pressure of ratio back pressure valve; P _min1for the minimum settling pressure of proportional pressure control valve; P _min2for the minimum setting pressure of ratio back pressure valve; I _min1for the minimum control electric current of proportional pressure control valve; I _min2for the minimum control electric current of ratio back pressure valve.

As shown in Figure 5, the mast rising and dropping control device in a kind of mast rising and dropping control system that is applied to above-mentioned arbitrary embodiment, comprising:

The first control convenience 50, for in the time receiving that mast hoists command information, control the first current controling signal of elevator rope closing to the first proportional reversing valve output, and control to the second proportional reversing valve output the second current controling signal that amplitude oil cylinder hoists, wherein, the time of exporting the first current controling signal is not later than the time of output the second current controling signal, and the current value of the first current controling signal is greater than the current value of the second current controling signal;

The second control convenience 51, in the time receiving mast landing command information, controls the first normally closed solenoid valve and opens, and controls to the second proportional reversing valve output the 3rd current controling signal that amplitude oil cylinder falls after rise.

This control setup can make hoist motor and amplitude oil cylinder coordination, steel rope can remain certain pulling force when being involved in reel or discharging reel, there will not be slack rope, disorder cable phenomenon, mast rises and falls without the length of the frequent manual regulation steel rope of operating personal, has greatly improved operating efficiency and safety that operation mast rises and falls.

Preferably, the first control convenience 50, also in the time that the operation pressure of the first by pass valve and the difference of settling pressure exceed the first range of pressure of setting, rise and fall hydraulic efficiency pressure system export the first prompt messages of locking mast;

The second control convenience 51, also in the time that the operation pressure of back pressure valve and the difference of setting pressure exceed the second range of pressure of setting, rise and fall hydraulic efficiency pressure system export the second prompt messages of locking mast.

Preferably, described mast rising and dropping control system also comprises second normally closed solenoid valve of connecting with the first by pass valve and arranging, and the second by pass valve being arranged in parallel with the first by pass valve and the second normally closed solenoid valve, the settling pressure of described the second by pass valve is greater than the settling pressure of described the first by pass valve;

Described the first control convenience 50, also in the time receiving that mast hoists command information, controls the second normally closed solenoid valve and opens.

Preferably, the first by pass valve is proportional pressure control valve, and back pressure valve is ratio back pressure valve, and control system also comprises the coder for detection of the current winding number of plies of hoisting rope;

Described the first control convenience 50, also for according to the mast of setting while hoisting the current winding number of plies of lineoutofservice signal pull and hoisting rope obtain the real-time control electric current of proportional pressure control valve; To the real-time control electric current of proportional pressure control valve export ratio by pass valve, the settling pressure of resize ratio by pass valve;

Described the second control convenience 51, also for obtaining the real-time control electric current of ratio back pressure valve according to the current winding number of plies of mast when landing lineoutofservice signal pull of setting and hoisting rope; To the real-time control electric current of ratio back pressure valve export ratio back pressure valve, the setting pressure of resize ratio back pressure valve.

Concrete, in the time that described proportional pressure control valve has inverse proportion current curve characteristic, described the first control convenience 50 obtains the real-time control electric current of proportional pressure control valve, specifically by following functional relation:

$I_1=\frac{(P_{\max 1}-\frac{10\mathrm{\π}\·F_1\·[D_0+2d(n-1)]}{i\·V_g\·{\mathrm{\η}}_m\·{\mathrm{\η}}_i})\·I_{\max 1}}{p_{\max 1}-P_{\min 1}}$

In the time that described proportional pressure control valve has direct proportion current curve characteristic, described the first control convenience 50 obtains the real-time control electric current of proportional pressure control valve, specifically by following functional relation:

$I_1=I_{\min 1}+\frac{\frac{10\mathrm{\π}\·F_1\·[D_0+2d(n-1)]}{i\·V_g\·{\mathrm{\η}}_m\·{\mathrm{\η}}_i}\·(I_{\max 1}-I_{\min 1})}{p_{\max 1}}$

In the time that described ratio back pressure valve has inverse proportion current curve characteristic, described the second control convenience 51 obtains the real-time control electric current of ratio back pressure valve, specifically by following functional relation:

$I_2=\frac{(P_{\max 2}-\frac{10\mathrm{\π}\·F_2\·[D_0+2d(n-1)]}{i\·V_g\·{\mathrm{\η}}_m\·{\mathrm{\η}}_i})\·I_{\max 2}}{p_{\max 2}-P_{\min 2}}$

In the time that described ratio back pressure valve has direct proportion current curve characteristic, described the second control convenience 51 obtains the real-time control electric current of ratio back pressure valve, specifically by following functional relation:

$I_2=I_{\min 2}+\frac{\frac{10\mathrm{\π}\·F_2\·[D_0+2d(n-1)]}{i\·V_g\·{\mathrm{\η}}_m\·{\mathrm{\η}}_i}\·(I_{\max 2}-I_{\min 2})}{p_{\max 2}}$

Wherein, F ₁lineoutofservice signal pull while hoisting for the mast of setting; F ₂lineoutofservice signal pull while landing for the mast of setting; N is the current winding number of plies of hoisting rope; D ₀for the low footpath of winding reel; D is the diameter of steel rope; I is the reduction ratio of hoisting speed reducer; V _gfor the discharge capacity of hoist motor; η _mfor the mechanical-hydraulic efficiency of hoist motor; η _ifor the mechanical efficiency of hoisting speed reducer; I ₁for the real-time control electric current of proportional pressure control valve, I ₂for the real-time control electric current of ratio back pressure valve; I _max1for the maximum controlling current of proportional pressure control valve; I _max2for the maximum controlling current of ratio back pressure valve; P _max1for the maximum settling pressure of proportional pressure control valve; P _max2for the maximum set pressure of ratio back pressure valve; P _min1for the minimum settling pressure of proportional pressure control valve; P _min2for the minimum setting pressure of ratio back pressure valve; I _min1for the minimum control electric current of proportional pressure control valve; I _min2for the minimum control electric current of ratio back pressure valve.

The beneficial effect of each embodiment is the same above, and it is no longer repeated here.

Obviously, those skilled in the art can carry out various changes and modification and not depart from spirit and scope of the present utility model the utility model.Like this, if these amendments of the present utility model and within modification belongs to the scope of the utility model claim and equivalent technologies thereof, the utility model is also intended to comprise these changes and modification interior.

Claims (7)

1. a mast rising and dropping control system, is characterized in that, comprising:

Hoist motor and the first proportional reversing valve moving for controlling hoist motor;

Amplitude oil cylinder and the second proportional reversing valve moving for controlling amplitude oil cylinder;

The first by pass valve, is arranged at hoisting on high-pressure oil passage of hoist motor, and when the settling pressure of described the first by pass valve hoists according to the mast of setting, lineoutofservice signal pull obtains;

The first normally closed solenoid valve and back pressure valve, be arranged in the closed circuit between two hydraulic fluid ports of hoist motor, the setting pressure of described back pressure valve according to set mast landing time lineoutofservice signal pull obtain;

Control setup, is connected with the first proportional reversing valve, the second proportional reversing valve and the first normally closed solenoid valve signal respectively.

2. control system as claimed in claim 1, is characterized in that, also comprises: pressure-detecting device, the operation pressure of back pressure valve when the operation pressure of the first by pass valve and mast land while hoisting for detection of mast;

Described control setup, is further connected with described pressure-detecting device signal.

3. control system as claimed in claim 1, it is characterized in that, also comprise: second normally closed solenoid valve of connecting with the first by pass valve and arranging, and the second by pass valve being arranged in parallel with the first by pass valve and the second normally closed solenoid valve, the settling pressure of described the second by pass valve is greater than the settling pressure of described the first by pass valve;

Described control setup, is further connected with described the second normally closed solenoid valve signal.

4. control system as claimed in claim 1, is characterized in that, described the first by pass valve is proportional pressure control valve, and described back pressure valve is ratio back pressure valve, and described control system also comprises the coder for detection of the current winding number of plies of hoisting rope;

Described control setup, is further connected with described proportional pressure control valve, ratio back pressure valve and code device signal.

5. the control system as described in claim 1～4 any one, is characterized in that, also comprises:

Be arranged at the balance cock of the rodless cavity oil port of amplitude oil cylinder; And/or

Be arranged at respectively the pressure-compensated valve on the import oil circuit of the first proportional reversing valve and the second proportional reversing valve; And/or

Be arranged at the check valve hoisting on high-pressure oil passage of hoist motor; And/or

Be arranged at the Fill valve between the oil return circuit of hydraulic efficiency pressure system and the landing oil inlet of hoist motor.

6. a super lifting device, is characterized in that, comprises the mast rising and dropping control system as described in claim 1～5 any one.

7. a hoisting crane, is characterized in that, comprises super lifting device as claimed in claim 6.