CN103663152B - Mast rising-falling control system, method and apparatus, super-lift apparatus and crane - Google Patents

Abstract

The invention relates to the technical field of cranes, and discloses a system, a method and an apparatus all for controlling mast rising and falling, a super-lift apparatus and a crane, and the system, the method and the apparatus are used for improving the work efficiency and the safety of mast rising and falling. The mast rising-falling control system comprises a first overflow valve arranged at a lift high-pressure oil circuit of a winch motor, a first normally-closed solenoid valve and a backpressure valve both arranged at a closed oil circuit between two oil port of the winch motor, and a control device respectively connected with a first proportional directional valve, a second proportional directional valve and the first normally-closed solenoid valve. When receiving mast rising command information, the control device is used to output a first current control signal controlling to winch and coil a rope to the first proportional direction valve and output a second current control signal controlling an amplitude-variable oil cylinder to lift to the second proportional directional valve, and when receiving mast falling command information, the control device is used to control the first normally-closed solenoid valve to open and output a third current control signal controlling the amplitude-variable oil cylinder to fall to the second proportional directional valve.

Description

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

Technical field

The present invention relates to hoisting crane technical field, particularly relate to a kind of mast rising and dropping control system, method, device and a kind of super lifting device and a kind of hoisting crane.

Background technology

Telescopic crane is with its flexible operation, with to hanging, with the advantage of hanging with walking, being widely used in engineer operation.Along with the large scale development of construction project, the property indices for Telescopic crane there has also been higher requirement, 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 more than 23% of complete machine weight, thing followed problem is: the increase that hoisting crane brachium, arm are heavy, and stressing conditions when hanging loads by making jib is more and more severe, and the amount of deflection of jib in luffing plane and plane of rotation (i.e. the vertical amount of deflection of jib and transverse deflection) is increasing.In order to improve the force-bearing situation of jib, avoid deflection of arm support excessive, super lifting device set up by some goliaths.

As illustrated in figs. ia and ib, 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, wherein, the fixed end of mast 11 and the basic arm 15 of jib 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 respectively with mast 11 and basic arm 15 hinged; Elevator 14 is arranged on the position of mast 11 near fixed end, leads back to mast 11 after the steel rope 16 that elevator 14 is discharged walks around pulley system 17.When needs lifting weight time, mast 11 can under the promotion of amplitude oil cylinder 13 around its fixed end luffing rotation with in surface to basic arm 15 less perpendicular.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 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 and the movable end of mast 11 of basic arm 15, alleviate the amount of deflection of mast 11, improve the limit of above-mentioned first pulling force.Therefore, super lifting device significantly can change the force-bearing situation of jib, is conducive to the performance figure such as the tonnage that hoists of lift crane, operating altitude and amplitude.

Rise and fall in process at mast, row's rope amount of elevator is moment change: rise in the process of mode of operation (i.e. 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 (Peril Incidents such as folding arm may be caused), need the pulling force making steel rope keep certain.In prior art, hoist mast time, first operate mast and to hoist certain angle, then stop mast action, regain unnecessary steel rope and steel rope is tightened; Operation mast continues the certain angle that hoists, and then stops mast action, again regains unnecessary steel rope; Operation like this is repeatedly until mast rises rise to mode of operation.Process during landing mast in contrast, first release the steel rope of certain surplus, operation mast landing certain angle, then mast action is stopped, again release 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 operation mast rises and falls process, need 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 current super lifting device has developed into 2 multiplying power to 4 multiplying powers, and the folding and unfolding amount of rope length is larger, and this technical matters is particularly outstanding especially.

Summary of the invention

Embodiments provide a kind of mast rising and dropping control system, method, device and a kind of super lifting device and a kind of hoisting crane, the operating efficiency risen and fallen in order to raising operation mast and safety.

The mast rising and dropping control system that the embodiment of the present invention provides, comprising:

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

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

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

First normally closed solenoid valve and back pressure valve, in the closed circuit between two hydraulic fluid ports being arranged at hoist motor, during the mast landing according to setting of the setting pressure of described back pressure valve, lineoutofservice signal pull obtains;

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 when receive mast hoist command information time, the first current controling signal controlling elevator rope closing is exported to the first proportional reversing valve, and the second current controling signal controlling amplitude oil cylinder and hoist is exported to the second proportional reversing valve, wherein, the time exporting the first current controling signal is not later than the time of output 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; When receiving mast landing command information, controlling the first normally closed solenoid valve and opening, and export the 3rd current controling signal controlling amplitude oil cylinder and fall after rise to the second proportional reversing valve.

The mast rising and dropping control system of the embodiment of the present invention, no matter be hoist in process at mast, or in mast descent, 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 need to the length of the frequent manual regulation steel rope of operating personal, substantially increases the operation operating efficiency that rises and falls of mast and safety.

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

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

This embodiment can when system pressure occurs abnormal, and locking mast rises and falls hydraulic efficiency pressure system export corresponding prompt messages in time, and alert is overhauled equipment, further increases the safety that operation mast rises and falls.

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

Described control setup, is connected with described second normally closed solenoid valve signal further, for when receive mast hoist command information time, control the second normally closed solenoid valve and open.

Second by pass valve can be used for the system pressure that independent rolling raises under operating mode and controls, and when the independent rolling of needs is raised, the second normally closed solenoid valve is in closed condition, and the first by pass valve does not work, and the oil pressure relief of system is determined by the second by pass valve; When 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.The program has been enriched elevator and have been risen and fallen the control policy of control system.

Preferably, described 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 detecting the current winding number of plies of hoisting rope;

Described control setup, is connected with described proportional pressure control valve, ratio back pressure valve and code device signal further, and during for 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; The real-time control electric current of described proportional pressure control valve is exported, the settling pressure of resize ratio by pass valve to proportional pressure control valve; And 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 when landing according to the mast of setting; The real-time control electric current of described ratio back pressure valve is exported, the setting pressure of resize ratio back pressure valve to ratio back pressure valve.

In this embodiment, when mast hoists, when lineoutofservice signal pull, mast landing, the current winding number of plies of lineoutofservice signal pull and hoisting rope can be respectively real-time variable, can realize mast according to the real-time control electric current of real-time variable determination proportional pressure control valve and the real-time control electric current of ratio back pressure valve rises and falls in process, different lineoutofservice signal pulls under different change angle, 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 the pressure-compensated valve on the import oil circuit of the first proportional reversing valve and the second proportional reversing valve respectively; And/or

Be arranged at the check valve hoisted 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 control change-over valve is stablized; Check valve can realize hoist motor and to hoist the one-way conduction of high-pressure oil passage; Fill valve can carry out repairing to prevent vacuum for hoist motor.

The embodiment of the present invention additionally provides a kind of super lifting device, comprises the mast rising and dropping control system of above-mentioned any embodiment.

The embodiment of the present invention additionally provides a kind of hoisting crane, comprises the super lifting device described in above-described embodiment.

The embodiment of the present invention additionally provides a kind of mast rising and dropping control method, is applied in above-mentioned mast rising and dropping control system, comprises:

When receive mast hoist command information time, the first current controling signal controlling elevator rope closing is exported to the first proportional reversing valve, and the second current controling signal controlling amplitude oil cylinder and hoist is exported to the second proportional reversing valve, wherein, the time exporting the first current controling signal is not later than the time of output 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;

When receiving mast landing command information, controlling the first normally closed solenoid valve and opening, and export the 3rd current controling signal controlling amplitude oil cylinder and fall after rise to the second proportional reversing valve.

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 need to the length of the frequent manual regulation steel rope of operating personal, substantially increases the operation operating efficiency that rises and falls of mast and safety.

The embodiment of the present invention additionally provides a kind of mast rising and dropping control device, is applied in above-mentioned mast rising and dropping control system, comprises:

First control convenience, for when receive mast hoist command information time, the first current controling signal controlling elevator rope closing is exported to the first proportional reversing valve, and the second current controling signal controlling amplitude oil cylinder and hoist is exported to the second proportional reversing valve, wherein, the time exporting the first current controling signal is not later than the time of output 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;

Second control convenience, for when receiving mast landing command information, controlling the first normally closed solenoid valve and opening, and export the 3rd current controling signal controlling amplitude oil cylinder and fall after rise to the second proportional reversing valve.

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 need to the length of the frequent manual regulation steel rope of operating personal, substantially increases the operation operating efficiency that rises and falls of mast and safety.

Accompanying drawing explanation

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 first embodiment of the invention;

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

Fig. 3 b is that third embodiment of the invention middle mast rises and falls hydraulic system structure schematic diagram;

Fig. 3 c is that fourth embodiment of the invention middle mast rises and falls hydraulic system structure schematic diagram;

Fig. 4 is the mast rising and dropping control method flow schematic diagram of one embodiment of the invention;

Fig. 5 is the mast rising and dropping control apparatus structure schematic diagram of one embodiment of the invention.

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-first proportional reversing valve;

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

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

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

51-second control convenience.

Detailed description of the invention

In order to improve the operation operating efficiency that rises and falls of mast and safety, embodiments provide a kind of mast rising and dropping control system, method, device and a kind of super lifting device and a kind of hoisting crane.The mast rising and dropping control system provided, no matter be hoist in process at mast, or in mast descent, 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 need to the length of the frequent manual regulation steel rope of operating personal, substantially increases the operation operating efficiency that rises and falls of mast and safety.The present invention is described with reference to the accompanying drawings below with specific embodiment.

As shown in Figure 2, the mast rising and dropping control system that the embodiment of the present invention provides, comprising:

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

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

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

First normally closed solenoid valve 22 and back pressure valve 23, in the closed circuit between two hydraulic fluid ports being arranged at hoist motor 18, during the mast landing according to setting of the setting pressure of back pressure valve 23, lineoutofservice signal pull obtains;

Control setup 24, be connected with the first proportional reversing valve 19, second proportional reversing valve 20 and the first normally closed solenoid valve 22 signal respectively, for when receive mast hoist command information time, the first current controling signal controlling elevator rope closing is exported to the first proportional reversing valve 19, and the second current controling signal controlling amplitude oil cylinder 13 and hoist is exported to the second proportional reversing valve 20, wherein, the time exporting the first current controling signal is not later than the time of output 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; When receiving mast landing command information, controlling the first normally closed solenoid valve 22 and opening, and export the 3rd current controling signal controlling amplitude oil cylinder 13 and fall after rise to the second proportional reversing valve 20.

The mast rising and dropping control system that the embodiment of the present invention provides can be applicable to all kinds ofly comprise in the hoisting crane of super lifting device, such as, 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 such as two-position four-way proportional reversing valve, 3-position 4-way proportional reversing valve etc., first proportional reversing valve 19 flows through by changing the action that the flow of hydraulic oil and direction control hoist motor 18, to realize rope closing, to put the action of rope, second proportional reversing valve 20 controls the action of amplitude oil cylinder 13, to realize hoisting and falling after rise of amplitude oil cylinder 13 by the flow and direction changing hydraulic oil.

The mast of an embodiment rises and falls hydraulic system structure schematic diagram 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 (can be communicated with the oil inlet P of hydraulic efficiency pressure system) of the first proportional reversing valve 19 to hoist motor 18 A mouth (now A mouth is oil inlet) between oil circuit; at this oil circuit, the first by pass valve 21 is set; when oil circuit pressure reaches the settling pressure of the first by pass valve 21; first by pass valve 21 starts the oil return inlet T overflow to hydraulic efficiency pressure system; to protect system, prevent overload.First normally closed solenoid valve 22 is for changing the oil channel structures of system, when mast hoists, 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, 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; When mast lands, 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 no longer flows through the first proportional reversing valve 19, back pressure valve 23 is in running order, for hoist motor 18 provides back pressure.

The mast of another embodiment rises and falls hydraulic system structure schematic diagram as shown in Figure 3 b.Hydraulic system structure also comprises: the second normally closed solenoid valve 26 be arranged in series with the first by pass valve 21, and the settling pressure of the second by pass valve 27, second by pass valve 27 to be 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 connected with the second normally closed solenoid valve 26 signal further, for when receive mast hoist command information time, control the second normally closed solenoid valve 26 and open, make the first by pass valve 21 in running order.

Second by pass valve 27 can be used for independent rolling raise operating mode under (when the jib of such as telehoist is retracted, or when the jib of telehoist carries out having surpassed pretension after stretching, now amplitude oil cylinder attonity) system pressure control, when the independent rolling of needs is raised, second normally closed solenoid valve 26 is in closed condition (hydraulic oil can not circulate at this), first by pass valve 21 does not work, and the oil pressure relief of system is determined by the second by pass valve 27; When mast hoists, the second normally closed solenoid valve 26 is opened (hydraulic oil can circulate at this), and the settling pressure due to the second by pass valve 27 is greater than the settling pressure of the first by pass valve 21, and the oil pressure relief of system is determined by the first by pass valve 21.The program has been enriched elevator and have been risen and fallen the control policy of control system, 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 operation pressure and mast for detecting the first by pass valve 21 when mast hoists land;

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

When the first by pass valve 21 or back pressure valve 23 break down, may exception be there is in the pressure of hydraulic efficiency pressure system, thus may cause Hydraulic Elements damage or elevator rise and fall uncontrollable, this embodiment can when system pressure occurs abnormal, timely locking mast rises and falls hydraulic efficiency pressure system export corresponding prompt messages, alert is overhauled equipment, further increases 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.Such as, pressure-detecting device can comprise two pressure sensors, is separately positioned in the closed circuit hoisted between high-pressure oil passage and two hydraulic fluid ports of 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 being arranged at the rodless cavity oil port of amplitude oil cylinder 13; Be arranged at the pressure-compensated valve 29 on the import oil circuit of the first proportional reversing valve 19 and the second proportional reversing valve 20 respectively; Be arranged at the check valve 30 hoisted 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 (i.e. the B mouth of hoist motor 18) 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 control change-over valve is stablized; Check valve 30 can realize hoist motor and to hoist the one-way conduction of high-pressure oil passage; Fill valve 31 can carry out repairing to prevent vacuum for hoist motor 18.

For Fig. 3 b illustrated embodiment, mast lift control process is as follows: when receive mast hoist command information time, export the first current controling signal to the first proportional reversing valve 19, electromagnet Y1 is obtained electric, hydraulic oil is through the A mouth of the A1 mouth arrival hoist motor 18 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 is pulled back steel rope under the Stress control of the first by pass valve 21, makes steel rope be involved in reel; (interval time rule of thumb can be set after above action, such as 2 seconds), the second current controling signal is exported to the second proportional reversing valve 20, electromagnet Y3 is obtained electric, hydraulic oil is through the rodless cavity of the A2 mouth arrival amplitude oil cylinder 13 of the second proportional reversing valve 20, and amplitude oil cylinder 13 hoists.Hoist in process in amplitude oil cylinder 13, the steel rope connecting mast and jib traction place can have the trend producing surplus gradually, the steel rope and hoist motor 18 has been pulled back under the Stress control of the first by pass valve 21, so unnecessary steel rope can constantly be pulled back and take in reel, there will not be slack rope phenomenon.In the process, because the time exporting the first current controling signal is not later than the time of output 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, can ensure that the rope closing speed of hoist motor 18 is greater than amplitude oil cylinder 13 and hoists the speed of produced steel rope surplus, lineoutofservice signal pull when making steel rope keep the mast of setting to hoist, is 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 when the settling pressure of the first by pass valve 21 can hoist according to the mast of setting, lineoutofservice signal pull calculates.Between lineoutofservice signal pull, there is following functional relation when the settling pressure of the first by pass valve 21 and the mast of setting hoist:

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

Wherein, P ₁be the settling pressure (bar) of the first by pass valve, F ₁lineoutofservice signal pull (ox) when mast for setting hoists; 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.

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

When receiving mast landing command information, make the electromagnet Y5 of the first normally closed solenoid valve 22 obtain electric, control the first normally closed solenoid valve 22 and open, export the 3rd current controling signal to the second proportional reversing valve 20, electromagnet Y2 is obtained electric, amplitude oil cylinder 13 falls simultaneously.In amplitude oil cylinder 13 dropping process, the steel rope connecting 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 B mouth of hoist motor 18 got back to again by the hydraulic oil of discharging after back pressure valve 23 and the first normally closed solenoid valve 22, in the process, Fill valve 31 carries out repairing constantly to hoist motor 18, to prevent vacuum, in mast descent, 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 mast of setting land 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) when mast for setting lands, all the other parameter connotation cotypes (1).

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

The mast rising and dropping control system of the embodiment of the present invention, no matter be hoist in process at mast, or in mast descent, 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 need to the length of the frequent manual regulation steel rope of operating personal, substantially increases the operation operating efficiency that rises and falls of mast and safety.

As shown in Figure 3 c, preferably, 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 detecting the current winding number of plies of hoisting rope;

Control setup 24, is connected with proportional pressure control valve, ratio back pressure valve and code device signal further, and during for 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 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 when landing according to the mast of setting; 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 mast hoists, when lineoutofservice signal pull, mast landing, the current winding number of plies of lineoutofservice signal pull and hoisting rope can be respectively real-time variable, can realize mast according to the real-time control electric current of real-time variable determination proportional pressure control valve and the real-time control electric current of ratio back pressure valve rises and falls in process, different lineoutofservice signal pulls under different change angle, to reach best rope closing or row's rope effect of steel rope, improve the control accuracy that mast rises and falls.

The embodiment of the present invention additionally provides a kind of super lifting device, comprises the mast rising and dropping control system of above-mentioned any 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 need to the length of the frequent manual regulation steel rope of operating personal, substantially increases the operation operating efficiency that rises and falls of mast and safety.

The embodiment of the present invention additionally 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 the operation operating efficiency that rises and falls of mast and safety higher.The particular type of hoisting crane is not limit, and comprises Telescopic crane etc.

As shown in Figure 4, based on identical inventive concept, the embodiment of the present invention additionally provides a kind of mast rising and dropping control method, is applied in the mast rising and dropping control system of above-mentioned any embodiment, comprises:

Step 101, reception mast action command information;

Step 102, when receive mast hoist command information time, the first current controling signal controlling elevator rope closing is exported to the first proportional reversing valve, and the second current controling signal controlling amplitude oil cylinder and hoist is exported to the second proportional reversing valve, wherein, the time exporting the first current controling signal is not later than the time of output 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, when receive mast landing command information time, control the first normally closed solenoid valve and open, and to second proportional reversing valve export control amplitude oil cylinder fall after rise the 3rd current controling signal.

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 need to the length of the frequent manual regulation steel rope of operating personal, substantially increases the operation operating efficiency that rises and falls of mast and safety.

Preferably, mast rising and dropping control method also comprises:

When the operation pressure of the first by pass valve and the difference of settling pressure exceed the first range of pressure of setting, locking mast rises and falls hydraulic efficiency pressure system export the first prompt messages; And

When the operation pressure of back pressure valve and the difference of setting pressure exceed the second range of pressure of setting, locking mast rises and falls hydraulic efficiency pressure system export the second prompt messages.

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

When receive mast hoist command information time, 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 the coder for detecting the current winding number of plies of hoisting rope, and control method also comprises:

When 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

When 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.

When proportional pressure control valve has inverse proportion current curve characteristic, when 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, especially by following functional relation:

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

When proportional pressure control valve has direct proportion current curve characteristic, when 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, especially by following functional relation:

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

When ratio back pressure valve has inverse proportion current curve characteristic, when 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, especially by following functional relation:

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

When ratio back pressure valve has direct proportion current curve characteristic, when 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, especially 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 when mast for setting hoists; F ₂lineoutofservice signal pull when mast for setting lands; 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, based on identical inventive concept, the embodiment of the present invention additionally provides a kind of mast rising and dropping control device, is applied in the mast rising and dropping control system of aforementioned any embodiment, comprises:

First control convenience 50, for when receive mast hoist command information time, the first current controling signal controlling elevator rope closing is exported to the first proportional reversing valve, and the second current controling signal controlling amplitude oil cylinder and hoist is exported to the second proportional reversing valve, wherein, the time exporting the first current controling signal is not later than the time of output 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;

Second control convenience 51, for when receiving mast landing command information, controlling the first normally closed solenoid valve and opening, and export the 3rd current controling signal controlling amplitude oil cylinder and fall after rise to the second proportional reversing valve.

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 need to the length of the frequent manual regulation steel rope of operating personal, substantially increases the operation operating efficiency that rises and falls of mast and safety.

Preferably, the first control convenience 50, also for when the operation pressure of the first by pass valve and the difference of settling pressure exceed the first range of pressure of setting, locking mast rises and falls hydraulic efficiency pressure system export the first prompt messages;

Second control convenience 51, also for when the operation pressure of back pressure valve and the difference of setting pressure exceed the second range of pressure of setting, locking mast rises and falls hydraulic efficiency pressure system export the second prompt messages.

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

Described first control convenience 50, also for when receive mast hoist command information time, 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 the coder for detecting the current winding number of plies of hoisting rope;

Described first control convenience 50, time also for 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;

Described second control convenience 51, time also for 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.

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

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

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

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

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

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

When described ratio back pressure valve has direct proportion current curve characteristic, described second control convenience 51 obtains the real-time control electric current of ratio back pressure valve, especially 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 when mast for setting hoists; F ₂lineoutofservice signal pull when mast for setting lands; 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 change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.

Claims (17)

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

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

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

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

First normally closed solenoid valve and back pressure valve, in the closed circuit between two hydraulic fluid ports being arranged at hoist motor, during the mast landing according to setting of the setting pressure of described back pressure valve, lineoutofservice signal pull obtains;

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 when receive mast hoist command information time, the first current controling signal controlling elevator rope closing is exported to the first proportional reversing valve, and the second current controling signal controlling amplitude oil cylinder and hoist is exported to the second proportional reversing valve, wherein, the time exporting the first current controling signal is not later than the time of output 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; When receiving mast landing command information, controlling the first normally closed solenoid valve and opening, and export the 3rd current controling signal controlling amplitude oil cylinder and fall after rise to the second proportional reversing valve.

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

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

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

Described control setup, is connected with described second normally closed solenoid valve signal further, for when receive mast hoist command information time, control the second normally closed solenoid valve and open.

4. control system as claimed in claim 1, it is characterized in that, described 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 detecting the current winding number of plies of hoisting rope;

Described control setup, is connected with described proportional pressure control valve, ratio back pressure valve and code device signal further, and during for 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; The real-time control electric current of described proportional pressure control valve is exported, the settling pressure of resize ratio by pass valve to proportional pressure control valve; And 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 when landing according to the mast of setting; The real-time control electric current of described ratio back pressure valve is exported, the setting pressure of resize ratio back pressure valve to ratio back pressure valve.

5. the control system as described in any one of Claims 1 to 4, 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 the pressure-compensated valve on the import oil circuit of the first proportional reversing valve and the second proportional reversing valve respectively; And/or

Be arranged at the check valve hoisted 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 any one of Claims 1 to 5.

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

8. a mast rising and dropping control method, is characterized in that, is applied in mast rising and dropping control system as claimed in claim 1, comprises:

When receive mast hoist command information time, the first current controling signal controlling elevator rope closing is exported to the first proportional reversing valve, and the second current controling signal controlling amplitude oil cylinder and hoist is exported to the second proportional reversing valve, wherein, the time exporting the first current controling signal is not later than the time of output 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;

When receiving mast landing command information, controlling the first normally closed solenoid valve and opening, and export the 3rd current controling signal controlling amplitude oil cylinder and fall after rise to the second proportional reversing valve.

9. control method as claimed in claim 8, is characterized in that, also comprise:

When the operation pressure of the first by pass valve and the difference of settling pressure exceed the first range of pressure of setting, locking mast rises and falls hydraulic efficiency pressure system export the first prompt messages; And

When the operation pressure of back pressure valve and the difference of setting pressure exceed the second range of pressure of setting, locking mast rises and falls hydraulic efficiency pressure system export the second prompt messages.

10. control method as claimed in claim 8, it is characterized in that, described mast rising and dropping control system also comprises the second normally closed solenoid valve be arranged in series with the first by pass valve, and the second by pass valve to be arranged in parallel with the first by pass valve and the second normally closed solenoid valve, the settling pressure of described second by pass valve is greater than the settling pressure of described first by pass valve, and described control method also comprises:

When receive mast hoist command information time, control the second normally closed solenoid valve and open.

11. control methods as claimed in claim 9, it is characterized in that, described first by pass valve is proportional pressure control valve, and described back pressure valve is ratio back pressure valve, described control system also comprises the coder for detecting the current winding number of plies of hoisting rope, and described control method also comprises:

When 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; The real-time control electric current of described proportional pressure control valve is exported, the settling pressure of resize ratio by pass valve to proportional pressure control valve; And

When 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; The real-time control electric current of described ratio back pressure valve is exported, the setting pressure of resize ratio back pressure valve to ratio back pressure valve.

12. control methods as claimed in claim 11, is characterized in that,

When described proportional pressure control valve has inverse proportion current curve characteristic, when the described mast according to setting hoists, 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, especially by following functional relation:

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

When described proportional pressure control valve has direct proportion current curve characteristic, when the described mast according to setting hoists, 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, especially by following functional relation:

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

When described ratio back pressure valve has inverse proportion current curve characteristic, during the described landing of the mast according to 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, especially by following functional relation:

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

When described ratio back pressure valve has direct proportion current curve characteristic, during the described landing of the mast according to 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, especially 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 when mast for setting hoists; F ₂lineoutofservice signal pull when mast for setting lands; 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.

13. 1 kinds of mast rising and dropping control devices, is characterized in that, are applied in mast rising and dropping control system as claimed in claim 1, comprise:

First control convenience, for when receive mast hoist command information time, the first current controling signal controlling elevator rope closing is exported to the first proportional reversing valve, and the second current controling signal controlling amplitude oil cylinder and hoist is exported to the second proportional reversing valve, wherein, the time exporting the first current controling signal is not later than the time of output 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;

Second control convenience, for when receiving mast landing command information, controlling the first normally closed solenoid valve and opening, and export the 3rd current controling signal controlling amplitude oil cylinder and fall after rise to the second proportional reversing valve.

14. control setups as claimed in claim 13, is characterized in that,

Described first control convenience, also for when the operation pressure of the first by pass valve and the difference of settling pressure exceed the first range of pressure of setting, locking mast rises and falls hydraulic efficiency pressure system export the first prompt messages;

Described second control convenience, also for when the operation pressure of back pressure valve and the difference of setting pressure exceed the second range of pressure of setting, locking mast rises and falls hydraulic efficiency pressure system export the second prompt messages.

15. control setups as claimed in claim 13, it is characterized in that, described mast rising and dropping control system also comprises the second normally closed solenoid valve be arranged in series with the first by pass valve, and the second by pass valve to be arranged in parallel with the first by pass valve and the second normally closed solenoid valve, the settling pressure of described second by pass valve is greater than the settling pressure of described first by pass valve;

Described first control convenience, also for when receive mast hoist command information time, control the second normally closed solenoid valve and open.

16. control setups as claimed in claim 14, it is characterized in that, described 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 detecting the current winding number of plies of hoisting rope;

Described first control convenience, time also for 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; The real-time control electric current of described proportional pressure control valve is exported, the settling pressure of resize ratio by pass valve to proportional pressure control valve;

Described second control convenience, time also for 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; The real-time control electric current of described ratio back pressure valve is exported, the setting pressure of resize ratio back pressure valve to ratio back pressure valve.

17. control setups as claimed in claim 16, is characterized in that,

When described proportional pressure control valve has inverse proportion current curve characteristic, described first control convenience obtains the real-time control electric current of proportional pressure control valve, especially by following functional relation:

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

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

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

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

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

When described ratio back pressure valve has direct proportion current curve characteristic, described second control convenience obtains the real-time control electric current of ratio back pressure valve, especially 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 when mast for setting hoists; F ₂lineoutofservice signal pull when mast for setting lands; 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.