CN104071709A - Fixed fly jib stepless amplitude-variation control system for crane and crane - Google Patents
Fixed fly jib stepless amplitude-variation control system for crane and crane Download PDFInfo
- Publication number
- CN104071709A CN104071709A CN201410345980.9A CN201410345980A CN104071709A CN 104071709 A CN104071709 A CN 104071709A CN 201410345980 A CN201410345980 A CN 201410345980A CN 104071709 A CN104071709 A CN 104071709A
- Authority
- CN
- China
- Prior art keywords
- change
- over valve
- control system
- valve
- oil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
The invention relates a fixed fly jib stepless amplitude-variation control system for a crane and the crane. The control system comprises an electronic proportional pressure-reducing valve, a variable pump, a first reversing valve, and a hydraulic oil cylinder for varying the amplitude of a fixed fly jib, wherein the first reversing valve is positioned on an oil line between the variable pump and the hydraulic oil cylinder; the pressure oil output by the variable pump is input in the hydraulic oil cylinder via the first reversing valve; the electronic proportional pressure-reducing valve controls the discharge volume of the output pressure oil of the variable pump. The control system provided by the invention utilizes the electronic proportional pressure-reducing valve for controlling the discharge volume of the variable pump so as to realize the continuous variation of the discharge value of the variable pump, and is wide in speed regulating range and good in jogging property.
Description
Technical field
The present invention relates to engineering machinery field, be specifically related to the fixing stepless luffing control system of auxiliary and hoisting crane for a kind of hoisting crane.
Background technology
On modern crane tool, along with the increase of tonnage, boom reach and weight are also in continuous lengthening, and therefore fixing auxiliary becomes an important tool that lengthens boom reach.And conventional fixing auxiliary is only to realize the variation of 0 °, 15 ° and 30 ° amplitude, when running into the narrow space of eminence, cannot realize lifting, finally give that user installation is in place brings great difficulty and danger.
Electricity proportional pressure-reducing valve can flexible utilization current signal, and by changing size of current, and then the delivery pressure of realizing electric proportional pressure-reducing valve changes along with curent change.
The stepless changing-breadth system of existing fixing auxiliary, is to utilize the oil pump of fixed displacement to hydraulic efficiency pressure system fuel feeding, and hydraulic oil, by electromagnetic valve and balance cock, finally promotes hydraulic ram and realizes the stepless luffing of fixing auxiliary.
The stepless changing-breadth system of existing fixing auxiliary has following shortcoming: 1, oil pump capacity is fixed, and speed adjustable range is narrower, and fretting performance is poor; 2, system pressure setting is low, and cylinder sizes is large, and lift heavy performance is low; 3,, without oil cylinder pressurizer, can not prevent from releasing in oil cylinder existing danger.
Summary of the invention
The invention provides the fixing stepless luffing control system of auxiliary and hoisting crane for a kind of hoisting crane, main purpose of the present invention is to realize the infinite speed variation of hydraulic ram and the stepless luffing of fixing auxiliary angle.
For achieving the above object, the invention provides following technical scheme:
The fixing stepless luffing control system of auxiliary for a kind of hoisting crane, comprises electric proportional pressure-reducing valve, controllable capacity pump, the first change-over valve and for making the hydraulic ram of fixing auxiliary luffing;
The first change-over valve is on the oil circuit between controllable capacity pump and hydraulic ram, and the pressure oil of controllable capacity pump output is through the first change-over valve input hydraulic pressure oil cylinder, the discharge capacity of the pressure oil output of electric proportional pressure-relief valve control controllable capacity pump.
According to one embodiment of present invention, the rod chamber of rodless cavity connection, the second actuator port and the hydraulic ram of further, the oil outlet connection of the oil inlet of the first change-over valve and controllable capacity pump, return opening and fuel tank connection, the first actuator port and hydraulic ram is communicated with.
According to one embodiment of present invention, further, control system also comprises the second change-over valve, and the second change-over valve is on the oil circuit between controllable capacity pump and the first change-over valve;
The second change-over valve is bi-bit bi-pass solenoid directional control valve, and the oil inlet of the oil inlet of the second change-over valve and the connection of the oil outlet of controllable capacity pump, the first actuator port and the first change-over valve is communicated with.
According to one embodiment of present invention, further, control system also comprises reel, and reel is on the oil circuit between the first change-over valve and hydraulic ram.
According to one embodiment of present invention, further, control system also comprises balance cock, and the rod chamber of the second actuator port connection, oil outlet and the hydraulic ram of the oil inlet of balance cock and the first change-over valve is communicated with.
According to one embodiment of present invention, further, control system also comprises one-way throttle valve, and the first actuator port of the first hydraulic fluid port respectively with the first change-over valve of one-way throttle valve, the control port of balance cock are communicated with, and the rodless cavity of the second hydraulic fluid port and hydraulic ram is communicated with.
According to one embodiment of present invention, further, control system also comprises energy storage, compression indicator and the 3rd check valve, the rod chamber of energy storage and hydraulic ram is communicated with, the rod chamber of the oil inlet of the 3rd check valve and energy storage connection, oil outlet and hydraulic ram is communicated with, and compression indicator is on the oil circuit between energy storage and the rod chamber of hydraulic ram.
According to one embodiment of present invention, further, control system also comprises the 3rd change-over valve and the 5th check valve, and the 3rd change-over valve and the 5th check valve are successively on the oil circuit between energy storage and the first actuator port of the first change-over valve.
According to one embodiment of present invention, further, control system also comprises the 6th check valve and the 4th change-over valve, and the 6th check valve and the 4th change-over valve are successively on the oil circuit between the first actuator port of the first change-over valve and the second actuator port of the first change-over valve.
The present invention also provides following technical scheme:
A kind of hoisting crane, hoisting crane comprises the fixing stepless luffing control system of auxiliary for hoisting crane as above.
Based on the arbitrary technical scheme in technique scheme, the embodiment of the present invention at least can produce following technique effect:
Because hoisting crane provided by the present invention comprises electric proportional pressure-reducing valve, controllable capacity pump, the first change-over valve by the fixing stepless luffing control system of auxiliary and for making the hydraulic ram of fixing auxiliary luffing; The first change-over valve is on the oil circuit between controllable capacity pump and hydraulic ram, the pressure oil of controllable capacity pump output is through the first change-over valve input hydraulic pressure oil cylinder, the discharge capacity of the pressure oil output of electricity proportional pressure-relief valve control controllable capacity pump, utilize electric proportional pressure-reducing valve to realize control variable pump capacity, realize the continuous variation of controllable capacity pump discharge capacity, speed adjustable range is wide, and fretting performance is good.
Brief description of the drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the hydraulic schematic diagram of hoisting crane of the present invention with the first embodiment of the fixing stepless luffing control system of auxiliary;
Fig. 2 is the hydraulic schematic diagram of hoisting crane of the present invention with the second embodiment of the fixing stepless luffing control system of auxiliary;
Fig. 3 is the hydraulic schematic diagram of hoisting crane of the present invention with the 3rd embodiment of the fixing stepless luffing control system of auxiliary.
Detailed description of the invention
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
It should be noted that: any technical characterictic in the present embodiment, any technical scheme is all one or more in technical characterictic or the optional technical scheme of plurality of optional, cannot exhaustive all alternative technical characterictics of the present invention and alternative technical scheme in order to describe succinct need in presents, also the embodiment that is not easy to each technical characterictic all emphasizes that it is one of optional numerous embodiments, so those skilled in the art should know: any technical characterictic and any technical scheme in the present embodiment all do not limit the scope of the invention, protection scope of the present invention should comprise that those skilled in the art do not pay the thinkable any alternate embodiments of creative work.
Below in order to narrate conveniently, hereinafter alleged " left side ", " right side ", " on ", left and right, the upper and lower of D score and accompanying drawing itself is to consistent.
As shown in Figure 1, the invention provides a kind of hoisting crane the first embodiment by the fixing stepless luffing control system of auxiliary, comprise electric proportional pressure-reducing valve 20, controllable capacity pump 21, the first change-over valve 4 and for making the hydraulic ram 13 of fixing auxiliary luffing;
The first change-over valve 4 is on the oil circuit between controllable capacity pump 21 and hydraulic ram 13, and the pressure oil that controllable capacity pump 21 is exported is through the first change-over valve 4 input hydraulic pressure oil cylinders 13, the discharge capacity of the pressure oil output of electric proportional pressure-reducing valve 20 control variable pumps 21.
This hoisting crane by the principle of work of the fixing stepless luffing control system of auxiliary is: the electric current of controlling electric proportional pressure-reducing valve, thereby control the delivery pressure of electric proportional pressure-reducing valve, and then control variable capacity of pump size, realize the infinite speed variation of hydraulic ram and the stepless luffing of fixing auxiliary angle.
This hoisting crane with the working process of the fixing stepless luffing control system of auxiliary is: the electric current of electric proportional pressure-reducing valve increases, and the delivery pressure of electric proportional pressure-reducing valve also increases, and it is large that the swash plate rotational angle of controllable capacity pump becomes, and variable capacity of pump also increases.
In a specific embodiment of the present invention, the curent change of electric proportional pressure-reducing valve drives the piston rod of piston cylinder flexible, and the flexible swash plate that drives controllable capacity pump of piston rod of piston cylinder rotates, and the swash plate of controllable capacity pump rotates the displacement variation that drives controllable capacity pump.
In a specific embodiment of the present invention, the electric current of electric proportional pressure-reducing valve 20 increases, the rodless cavity oil-feed of first piston cylinder 1, and the piston rod of first piston cylinder 1 moves right; The rodless cavity oil return of the second piston cylinder 2, the piston rod of the second piston cylinder 2 is moved to the left; It is large that the swash plate rotational angle of controllable capacity pump 21 becomes, and the discharge capacity of controllable capacity pump 21 also increases.
In a specific embodiment of the present invention, the inside of the rodless cavity of first piston cylinder 1 has spring, spring connects bottom and the piston rod of rodless cavity, in the time of the rodless cavity oil return of first piston cylinder 1, spring can make the piston rod of first piston cylinder 1 be moved to the left, and spring is to reset for the piston rod of first piston cylinder 1.
The electric current of electricity proportional pressure-reducing valve 20 increases realizes the rodless cavity oil-feed of first piston cylinder 1, the rodless cavity oil return of the second piston cylinder 2, can obtain by the oil circuit connected relation of valve body and first piston cylinder 1, the second piston cylinder 2, this oil circuit connected relation is prior art, no longer launches herein to describe.
Controllable capacity pump can be high-pressure plunger controllable capacity pump, and high-pressure plunger controllable capacity pump, as oil sources, has improved system pressure, has reduced hydraulic ram and each control cock, line size, has improved fixing auxiliary lift heavy performance.
In a specific embodiment of the present invention, the first change-over valve 4 can be 3-position 4-way solenoid directional control valve, and meta slide valve function is P type;
The rod chamber of rodless cavity connection, the second actuator port and the hydraulic ram 13 of oil outlet connection, return opening and fuel tank connection, the first actuator port and the hydraulic ram 13 of the oil inlet of the first change-over valve 4 and controllable capacity pump 21 is communicated with.
The first change-over valve 4 has three kinds of control positioies, is respectively left position, meta and right position; When the first change-over valve 4 is in left when position, oil inlet and the second actuator port are communicated with, and return opening and the first actuator port are communicated with; When the first change-over valve 4 is during in meta, oil inlet cut-off, return opening respectively with the first actuator port, the second actuator port are communicated with; When the first change-over valve 4 is in right when position, oil inlet and the first actuator port are communicated with, and return opening and the second actuator port are communicated with.
In a specific embodiment of the present invention, control system can also comprise that the second change-over valve 3, the second change-over valves 3 are on the oil circuit between controllable capacity pump 21 and the first change-over valve 4;
The second change-over valve 3 is bi-bit bi-pass solenoid directional control valve, and the oil inlet of oil outlet connection, the first actuator port and first change-over valve 4 of the oil inlet of the second change-over valve 3 and controllable capacity pump 21 is communicated with.
The second change-over valve 3 has two kinds of control positioies, is respectively left position and right position; When the second change-over valve 3 is in left when position, oil inlet and the first actuator port are communicated with; When the second change-over valve 3 is in right when position, oil inlet and the first actuator port are not communicated with.
In the time that fixing auxiliary rises, along with the increase of handle electric current, electricity proportional pressure-reducing valve 20 electric currents increase, controllable capacity pump 21 discharge capacities increase continuously, the second change-over valve 3, the left position of the first change-over valve 4 obtains electric, the second change-over valve 3, the first change-over valve 4 is all in left position, the hydraulic oil that controllable capacity pump 21 is exported is through oil inlet and first actuator port of the second change-over valve 3, the oil inlet of the first change-over valve 4 and the second actuator port are to the rod chamber of hydraulic ram 13, the hydraulic oil of the rodless cavity of hydraulic ram 13 through the first actuator port of the first change-over valve 4 and return opening to fuel tank, realize the contracting of hydraulic ram 13.
In the time that fixing auxiliary falls, along with the increase of handle electric current, electricity proportional pressure-reducing valve 20 electric currents increase, controllable capacity pump 21 discharge capacities increase continuously, the left position of the second change-over valve 3 obtains electric, the right position of the first change-over valve 4 obtains electric, the second change-over valve 3 is in left position, the first change-over valve 4 is in right position, the hydraulic oil that controllable capacity pump 21 is exported is through oil inlet and first actuator port of the second change-over valve 3, the oil inlet of the first change-over valve 4 and the first actuator port are to the rodless cavity of hydraulic ram 13, the hydraulic oil of the rod chamber of hydraulic ram 13 through the second actuator port of the first change-over valve 4 and return opening to fuel tank, realize stretching of hydraulic ram 13.
In a specific embodiment of the present invention, control system can also comprise the first check valve 22 and the second check valve 23, the first check valve 22 and the second check valve 23 are arranged in parallel, the return opening of the oil inlet of the first check valve 22 and fuel tank connection, oil outlet and the first change-over valve 4 is communicated with, and return opening connection, oil outlet and the fuel tank of the oil inlet of the second check valve 23 and the first change-over valve 4 are communicated with.
In a specific embodiment of the present invention, control system can also comprise that the oil inlet of the first by pass valve 5, the first by pass valves 5 and the first actuator port connection of the first change-over valve 4, return opening and fuel tank are communicated with.
In a specific embodiment of the present invention, control system can also comprise that the oil inlet of the second by pass valve 6, the second by pass valves 6 and the second actuator port connection of the first change-over valve 4, return opening and fuel tank are communicated with.
In a specific embodiment of the present invention, control system can also comprise reel 7, and reel 7 is on the oil circuit between the first change-over valve 4 and hydraulic ram 13.
In a specific embodiment of the present invention, control system can also comprise balance cock 15, and the rod chamber of the second actuator port connection, oil outlet and the hydraulic ram 13 of the oil inlet of balance cock 15 and the first change-over valve 4 is communicated with.
Balance cock 15 comprises check valve and flow regulating valve, and the rod chamber of the second actuator port connection, oil outlet and the hydraulic ram 13 of the oil inlet of check valve and the first change-over valve 4 is communicated with; The second actuator port of rod chamber connection, oil outlet and first change-over valve 4 of the oil inlet of flow regulating valve and hydraulic ram 13 is communicated with; When balance cock 15 is during in check valve position, the second actuator port of the first change-over valve 4 is the rod chamber oil-feed to hydraulic ram 13 by check valve, realizes the contracting of hydraulic ram 13; When balance cock 15 is during in throttle valve position, the rod chamber of hydraulic ram 13 is given the first change-over valve 4 the second actuator port oil return by flow regulating valve, realizes stretching of hydraulic ram 13.
In a specific embodiment of the present invention, control system can also comprise one-way throttle valve 14, the first actuator port of the first hydraulic fluid port respectively with the first change-over valve 4 of one-way throttle valve 14, the control port of balance cock 15 are communicated with, and the rodless cavity of the second hydraulic fluid port and hydraulic ram 13 is communicated with.
One-way throttle valve 14 comprises check valve and damping, and the rodless cavity of the oil inlet of check valve and hydraulic ram 13 is communicated with, and the first actuator port of oil outlet and the first change-over valve 4, the control port of balance cock 15 are communicated with; The first actuator port of the first hydraulic fluid port of damping and the connection of the rodless cavity of hydraulic ram 13, the second hydraulic fluid port and the first change-over valve 4 is communicated with; When the first actuator port of the first change-over valve 4 is by damping during to the rodless cavity oil-feed of hydraulic ram 13, the first actuator port of the first change-over valve 4 balances the control port oil supply of valve 15 simultaneously, make balance cock 15 in throttle valve position, the rod chamber of hydraulic ram 13 is given the first change-over valve 4 the second actuator port oil return by flow regulating valve, realizes stretching of hydraulic ram 13; In the time that the rodless cavity of hydraulic ram 13 is given the first actuator port oil return of the first change-over valve 4 by check valve, the first actuator port oil return of the first change-over valve 4 is given in the control port of balance cock 15 simultaneously, make balance cock 15 in check valve position, the second actuator port of the first change-over valve 4 is the rod chamber oil-feed to hydraulic ram 13 by check valve, realizes the contracting of hydraulic ram 13.
One-way throttle valve 14 can improve the control mouth pressure of balance cock 15, and the debugging scope of balance cock is reduced, and can either keep fixing auxiliary steadily to rise, and can play again the effect of debugging.
In a specific embodiment of the present invention, control system can also comprise energy storage 10, compression indicator 11 and the 3rd check valve 16, the rod chamber of energy storage 10 and hydraulic ram 13 is communicated with, the rod chamber of the oil inlet of the 3rd check valve 16 and energy storage 10 connections, oil outlet and hydraulic ram 13 is communicated with, and compression indicator 11 is on the oil circuit between energy storage 10 and the rod chamber of hydraulic ram 13.
Compression indicator 11 is used for the pressure of the rod chamber of measuring respectively energy storage 10 and hydraulic ram 13.
In a specific embodiment of the present invention, control system can also comprise that the oil inlet of the 4th check valve 17, the four check valves 17 and the second actuator port connection, oil outlet and the energy storage 10 of the first change-over valve 4 are communicated with.
In a specific embodiment of the present invention, control system can also comprise that the 3rd change-over valve 9 and the 5th check valve 18, the three change-over valves 9 and the 5th check valve 18 are successively on the oil circuit between energy storage 10 and the first actuator port of the first change-over valve 4.
In a specific embodiment of the present invention, the 3rd change-over valve 9 can be bi-bit bi-pass hand change over valve, the oil inlet of the 3rd change-over valve 9 and energy storage 10 are communicated with, the oil inlet of the first actuator port and the 5th check valve 18 is communicated with, and the first actuator port of the oil outlet of the 5th check valve 18 and the first change-over valve 4 is communicated with.
The 3rd change-over valve 9 has two kinds of control positioies, is respectively upper and the next; When the 3rd change-over valve 9 is when upper, oil inlet and the first actuator port are communicated with; When the second change-over valve 3 is when the next, oil inlet and the first actuator port are not communicated with.
In the time that fixing auxiliary rises, along with the increase of handle electric current, electricity proportional pressure-reducing valve 20 electric currents increase, controllable capacity pump 21 discharge capacities increase continuously, the second change-over valve 3, the left position of the first change-over valve 4 obtain electric, the second change-over valve 3, the first change-over valve 4 are all in left position, the 3rd change-over valve 9 is in upper, the hydraulic oil of energy storage 10 to fuel tank, is realized the decompression function of energy storage 10 through the first actuator port of the oil inlet of the oil inlet of the 3rd change-over valve 9 and the first actuator port, the 5th check valve 18 and oil outlet, the first change-over valve 4 and return opening.
In a specific embodiment of the present invention, control system can also comprise that the oil inlet of the 3rd oil inlet of by pass valve 12, the three by pass valves 12 and the rod chamber connection of hydraulic ram 13, return opening and the 5th check valve 18 is communicated with.
In a specific embodiment of the present invention, control system can also comprise that the 6th check valve 19 and the 4th change-over valve 8, the six check valves 19 and the 4th change-over valve 8 are successively on the oil circuit between the first actuator port of the first change-over valve 4 and the second actuator port of the first change-over valve 4.
In a specific embodiment of the present invention, the 4th change-over valve 8 can be bi-bit bi-pass hand change over valve, the oil inlet of the first actuator port connection, oil outlet and the 4th change-over valve 8 of the oil inlet of the 6th check valve 19 and the first change-over valve 4 is communicated with, and the second actuator port of the first actuator port of the 4th change-over valve 8 and the first change-over valve 4 is communicated with.
The 4th change-over valve 8 has two kinds of control positioies, is respectively upper and the next; When the 4th change-over valve 8 is when upper, oil inlet and the first actuator port are not communicated with; When the 4th change-over valve 8 is when the next, oil inlet and the first actuator port are communicated with.
The first change-over valve 4 must not be electric, the first change-over valve 4 is in meta, the 4th change-over valve 8 is in the next, hydraulic oil one tunnel of the control port of the hydraulic oil of the rodless cavity of hydraulic ram 13 and balance cock 15 through the first actuator port of the first change-over valve 4 and return opening to fuel tank, another road of the hydraulic oil of the control port of the hydraulic oil of the rodless cavity of hydraulic ram 13 and balance cock 15 is through oil inlet and the oil outlet of the 6th check valve 19, the oil inlet of the 4th change-over valve 8 and the first actuator port, the second actuator port of the first change-over valve 4 and return opening are to fuel tank, be that the hydraulic oil of rodless cavity of hydraulic ram 13 and the hydraulic oil of the control port of balance cock 15 can pass through two-way oil circuit oil sump tank, the quick pressure releasing of the rodless cavity of hydraulic ram 13 when realizing handle and returning meta, the quick draining of hydraulic oil of the control port of balance cock 15, make balance cock quick closedown, in unidirectional valve position.
The fixing stepless luffing control system of auxiliary for this hoisting crane, the 6th check valve 19, the 4th change-over valve 8, the 5th check valve 18, the 3rd change-over valve 9, the 3rd by pass valve 12 have formed hydraulic ram pressurizer, have prevented from letting out in hydraulic ram the danger bringing.
As shown in Figure 2, the present invention also provides second embodiment of a kind of hoisting crane by the fixing stepless luffing control system of auxiliary, the difference of the second embodiment and the first embodiment is: the oil inlet position that has changed the 3rd by pass valve 12 is identical with the first embodiment with all the other positions that increased by the 4th by pass valve 24, the second embodiment.
Be specially: the oil inlet of the oil inlet of the 3rd by pass valve 12 and energy storage 10 connections, return opening and the 5th check valve 18 is communicated with; Control system also comprises that the first actuator port of the 4th oil inlet of by pass valve 24, the four by pass valves 24 and the rod chamber connection of hydraulic ram 13, return opening and the first change-over valve 4 is communicated with.
The 4th by pass valve 24 can prevent separately that hydraulic ram detonation from occurring.
As shown in Figure 3, the present invention also provides three embodiment of a kind of hoisting crane by the fixing stepless luffing control system of auxiliary, the difference of the 3rd embodiment and the second embodiment is: all the other positions that balance cock 15 changed to the 7th check valve 25, the three embodiment are identical with the second embodiment.
Be specially: control system can also comprise that the rod chamber of the oil inlet of the 7th check valve 25, the seven check valves 25 and the second actuator port connection, oil outlet and the hydraulic ram 13 of the first change-over valve 4 is communicated with.
The present invention also provides a kind of hoisting crane, and hoisting crane comprises the fixing stepless luffing control system of auxiliary for hoisting crane as above.
The other parts of hoisting crane can be with reference to prior art, no longer launches herein to describe.
The disclosed arbitrary technical scheme of the invention described above unless otherwise stated, if it discloses number range, so disclosed number range is preferred number range, any it should be appreciated by those skilled in the art: preferred number range is only the obvious or representative numerical value of technique effect in many enforceable numerical value.Because numerical value is more, cannot be exhaustive, so the present invention just discloses part numerical value with casehistory technical scheme of the present invention, and the above-mentioned numerical value of enumerating should not form the restriction to the invention protection domain.
If used the word such as " first ", " second " to limit parts herein, those skilled in the art should know: the use of " first ", " second " is only used to be convenient to describe above parts are distinguished as not having outside Stated otherwise, and above-mentioned word does not have special implication.
Simultaneously, if the invention described above discloses or has related to parts or the framing member of connection fastened to each other, so, unless otherwise stated, be fixedly connected with and can be understood as: can dismantle and be fixedly connected with (for example using bolt or screw to connect), also can be understood as: non-removable being fixedly connected with (for example rivet, weld), certainly, connection fastened to each other also can for example, be replaced (obviously cannot adopt except integrally formed technique) by integral type structure (use foundry technique is integrally formed to be created).
In addition, in the disclosed arbitrary technical scheme of the invention described above applied for the term that represents position relationship or shape unless otherwise stated its implication comprise and its approximate, similar or approaching state or shape.Arbitrary parts provided by the invention can be both to be assembled by multiple independent component parts, the produced separate part of the technique that also can be one of the forming.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit; Although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the field are to be understood that: still can modify or part technical characterictic is equal to replacement the specific embodiment of the present invention; And not departing from the spirit of technical solution of the present invention, it all should be encompassed in the middle of the technical scheme scope of request protection of the present invention.
Claims (10)
1. the fixing stepless luffing control system of auxiliary for hoisting crane, is characterized in that,
Comprise: electric proportional pressure-reducing valve, controllable capacity pump, the first change-over valve and for making the hydraulic ram of fixing auxiliary luffing;
Described the first change-over valve is on the oil circuit between described controllable capacity pump and described hydraulic ram, the pressure oil of described controllable capacity pump output is inputted described hydraulic ram through described the first change-over valve, the discharge capacity of the pressure oil output of controllable capacity pump described in described electric proportional pressure-relief valve control.
2. control system according to claim 1, is characterized in that,
The rod chamber of rodless cavity connection, the second actuator port and the hydraulic ram of oil outlet connection, return opening and fuel tank connection, the first actuator port and the hydraulic ram of the oil inlet of the first change-over valve and controllable capacity pump is communicated with.
3. control system according to claim 1 and 2, is characterized in that,
Described control system also comprises the second change-over valve, and the second change-over valve is on the oil circuit between controllable capacity pump and the first change-over valve;
The second change-over valve is bi-bit bi-pass solenoid directional control valve, and the oil inlet of the oil inlet of the second change-over valve and the connection of the oil outlet of controllable capacity pump, the first actuator port and the first change-over valve is communicated with.
4. control system according to claim 1 and 2, is characterized in that,
Described control system also comprises reel, and reel is on the oil circuit between the first change-over valve and hydraulic ram.
5. control system according to claim 2, is characterized in that,
Described control system also comprises balance cock, and the rod chamber of the second actuator port connection, oil outlet and the hydraulic ram of the oil inlet of balance cock and the first change-over valve is communicated with.
6. control system according to claim 5, is characterized in that,
Described control system also comprises one-way throttle valve, and the first actuator port of the first hydraulic fluid port respectively with the first change-over valve of one-way throttle valve, the control port of balance cock are communicated with, and the rodless cavity of the second hydraulic fluid port and hydraulic ram is communicated with.
7. control system according to claim 1 and 2, is characterized in that,
Described control system also comprises energy storage, compression indicator and the 3rd check valve, the rod chamber of energy storage and hydraulic ram is communicated with, the rod chamber of the oil inlet of the 3rd check valve and energy storage connection, oil outlet and hydraulic ram is communicated with, and compression indicator is on the oil circuit between energy storage and the rod chamber of hydraulic ram.
8. control system according to claim 7, is characterized in that,
Described control system also comprises the 3rd change-over valve and the 5th check valve, and the 3rd change-over valve and the 5th check valve are successively on the oil circuit between energy storage and the first actuator port of the first change-over valve.
9. control system according to claim 1 and 2, is characterized in that,
Described control system also comprises the 6th check valve and the 4th change-over valve, and the 6th check valve and the 4th change-over valve are successively on the oil circuit between the first actuator port of the first change-over valve and the second actuator port of the first change-over valve.
10. a hoisting crane, is characterized in that, described hoisting crane comprises the fixing stepless luffing control system of auxiliary for hoisting crane described in claim 1-9 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410345980.9A CN104071709B (en) | 2014-07-18 | 2014-07-18 | A kind of crane controls system and crane with the fixing stepless luffing of auxiliary |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410345980.9A CN104071709B (en) | 2014-07-18 | 2014-07-18 | A kind of crane controls system and crane with the fixing stepless luffing of auxiliary |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104071709A true CN104071709A (en) | 2014-10-01 |
| CN104071709B CN104071709B (en) | 2016-07-06 |
Family
ID=51593377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410345980.9A Active CN104071709B (en) | 2014-07-18 | 2014-07-18 | A kind of crane controls system and crane with the fixing stepless luffing of auxiliary |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104071709B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105179356A (en) * | 2015-08-27 | 2015-12-23 | 徐州重型机械有限公司 | Auxiliary boom control valve, auxiliary boom hydraulic control system and crane |
| CN106006416A (en) * | 2016-07-07 | 2016-10-12 | 徐州重型机械有限公司 | Fixed jib stepless amplitude change device and crane |
| CN108105182A (en) * | 2016-11-24 | 2018-06-01 | 川崎重工业株式会社 | Oil pressure actuated systems |
| CN109139583A (en) * | 2018-10-23 | 2019-01-04 | 河南垣发专用车辆集团有限公司 | A kind of forklift hydraulic control system |
| CN111891946A (en) * | 2020-07-29 | 2020-11-06 | 徐州重型机械有限公司 | Power transmission system and method and crane |
| CN112460078A (en) * | 2020-12-10 | 2021-03-09 | 徐州徐工挖掘机械有限公司 | Oil drainage hydraulic safety system |
| CN114014187A (en) * | 2021-11-30 | 2022-02-08 | 三一汽车起重机械有限公司 | Hydraulic control system and method and crane |
| CN115215274A (en) * | 2022-08-18 | 2022-10-21 | 北京中科宇航技术有限公司 | System for controlling speed and automatically adjusting speed in rocket erecting and laying process |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5628302A (en) * | 1979-08-17 | 1981-03-19 | Hitachi Constr Mach Co Ltd | Speed control circuit of crane or the like |
| SU1109358A1 (en) * | 1982-07-30 | 1984-08-23 | Всесоюзный научно-исследовательский институт строительного и дорожного машиностроения | Self-propelled boom crane |
| CN2695706Y (en) * | 2004-03-31 | 2005-04-27 | 徐州重型机械厂 | Hydraulic guide operation variable-amplitude hydraulic device |
| CN101315068A (en) * | 2008-07-11 | 2008-12-03 | 宁波恒力液压机械制造有限公司 | Electrohydraulic proportion variable axial plunger pump |
| CN202829340U (en) * | 2012-10-19 | 2013-03-27 | 中联重科股份有限公司 | Hydraulic system controlling boom to vary amplitude and crane |
| JP2013193840A (en) * | 2012-03-19 | 2013-09-30 | Kawasaki Heavy Ind Ltd | Hydraulic controller for deck crane |
| CN103482476A (en) * | 2013-09-29 | 2014-01-01 | 徐州重型机械有限公司 | Control device for increasing variable-amplitude falling speed of crane |
| CN203529814U (en) * | 2013-09-29 | 2014-04-09 | 徐州重型机械有限公司 | Variable amplitude control system for fixed fly jib of crane |
| CN204265320U (en) * | 2014-07-18 | 2015-04-15 | 徐州重型机械有限公司 | A kind of hoisting crane fixing stepless luffing control system of auxiliary and hoisting crane |
-
2014
- 2014-07-18 CN CN201410345980.9A patent/CN104071709B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5628302A (en) * | 1979-08-17 | 1981-03-19 | Hitachi Constr Mach Co Ltd | Speed control circuit of crane or the like |
| SU1109358A1 (en) * | 1982-07-30 | 1984-08-23 | Всесоюзный научно-исследовательский институт строительного и дорожного машиностроения | Self-propelled boom crane |
| CN2695706Y (en) * | 2004-03-31 | 2005-04-27 | 徐州重型机械厂 | Hydraulic guide operation variable-amplitude hydraulic device |
| CN101315068A (en) * | 2008-07-11 | 2008-12-03 | 宁波恒力液压机械制造有限公司 | Electrohydraulic proportion variable axial plunger pump |
| JP2013193840A (en) * | 2012-03-19 | 2013-09-30 | Kawasaki Heavy Ind Ltd | Hydraulic controller for deck crane |
| CN202829340U (en) * | 2012-10-19 | 2013-03-27 | 中联重科股份有限公司 | Hydraulic system controlling boom to vary amplitude and crane |
| CN103482476A (en) * | 2013-09-29 | 2014-01-01 | 徐州重型机械有限公司 | Control device for increasing variable-amplitude falling speed of crane |
| CN203529814U (en) * | 2013-09-29 | 2014-04-09 | 徐州重型机械有限公司 | Variable amplitude control system for fixed fly jib of crane |
| CN204265320U (en) * | 2014-07-18 | 2015-04-15 | 徐州重型机械有限公司 | A kind of hoisting crane fixing stepless luffing control system of auxiliary and hoisting crane |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105179356A (en) * | 2015-08-27 | 2015-12-23 | 徐州重型机械有限公司 | Auxiliary boom control valve, auxiliary boom hydraulic control system and crane |
| CN106006416A (en) * | 2016-07-07 | 2016-10-12 | 徐州重型机械有限公司 | Fixed jib stepless amplitude change device and crane |
| CN106006416B (en) * | 2016-07-07 | 2018-06-26 | 徐州重型机械有限公司 | Fix the stepless luffing device of auxiliary and crane |
| CN108105182A (en) * | 2016-11-24 | 2018-06-01 | 川崎重工业株式会社 | Oil pressure actuated systems |
| CN108105182B (en) * | 2016-11-24 | 2020-01-17 | 川崎重工业株式会社 | Oil pressure driving system |
| CN109139583B (en) * | 2018-10-23 | 2024-05-17 | 河南垣发专用车辆集团有限公司 | Hydraulic control system for forklift |
| CN109139583A (en) * | 2018-10-23 | 2019-01-04 | 河南垣发专用车辆集团有限公司 | A kind of forklift hydraulic control system |
| CN111891946A (en) * | 2020-07-29 | 2020-11-06 | 徐州重型机械有限公司 | Power transmission system and method and crane |
| CN112460078B (en) * | 2020-12-10 | 2024-01-23 | 徐州徐工挖掘机械有限公司 | Hydraulic safety system for oil drainage |
| CN112460078A (en) * | 2020-12-10 | 2021-03-09 | 徐州徐工挖掘机械有限公司 | Oil drainage hydraulic safety system |
| CN114014187A (en) * | 2021-11-30 | 2022-02-08 | 三一汽车起重机械有限公司 | Hydraulic control system and method and crane |
| CN114014187B (en) * | 2021-11-30 | 2023-08-22 | 三一汽车起重机械有限公司 | Hydraulic control system and method and crane |
| CN115215274A (en) * | 2022-08-18 | 2022-10-21 | 北京中科宇航技术有限公司 | System for controlling speed and automatically adjusting speed in rocket erecting and laying process |
| CN115215274B (en) * | 2022-08-18 | 2023-09-29 | 北京中科宇航技术有限公司 | System for speed control and automatic regulation in rocket erecting and laying process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104071709B (en) | 2016-07-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104071709A (en) | Fixed fly jib stepless amplitude-variation control system for crane and crane | |
| CN104477798B (en) | The principal arm luffing control system of crane and crane | |
| CN102887435B (en) | Hydraulic system for controlling amplitude variation of crane boom, control method and crane | |
| CN102628459B (en) | Multi-oil-cylinder synchronous control system and engineering vehicle | |
| CN103244496A (en) | Rotary control valve unit, rotary control hydraulic system and crane | |
| CN105156391A (en) | Composite variable pump and hydraulic control system using composite variable pump | |
| CN106545041B (en) | hydraulic control system and excavator | |
| CN105134573A (en) | Plunger piston combined type digital variable pump | |
| CN201125403Y (en) | Loading apparatus load sensing energy-saving hydraulic system | |
| CN204096970U (en) | A kind of luffing range of cantilever support hydraulic efficiency pressure system of hoisting crane and hoisting crane | |
| CN202829340U (en) | Hydraulic system controlling boom to vary amplitude and crane | |
| CN102562686A (en) | Hydraulic system for double-acting supercharger | |
| CN103899588B (en) | Lorry-mounted crane multi-way reversing device and straight-arm lorry-mounted crane | |
| CN202789789U (en) | Anti-shake hydraulic system of rotary drilling rig | |
| CN103591062B (en) | Loading machine quantitative pump pressure compensates and automatic deloading hydraulic system | |
| CN104828702A (en) | Crane, reversing control system, and oil supply apparatus thereof | |
| CN104444816B (en) | The hydraulic control system of a kind of hoisting machinery and hoisting machinery | |
| CN101839264A (en) | Load sensing electro-hydraulic proportional multi-way reversing oil circuit | |
| CN204265320U (en) | A kind of hoisting crane fixing stepless luffing control system of auxiliary and hoisting crane | |
| CN204553377U (en) | Low energy consumption many actuators hydraulic system and excavator | |
| CN106194680A (en) | The axial plunger pump installation of a kind of high accuracy electric proportional control and control method | |
| CN202348801U (en) | Dual-pump dual-loop full-liquid-control reversing hydraulic control system | |
| CN107200284A (en) | The hydraulic control system and crane of hoisting mechanism | |
| CN208087097U (en) | The variable amplitude hydraulic system and lorry-mounted crane of crane | |
| CN203717509U (en) | Lorry-mounted crane multi-way reversing device and straight-arm lorry-mounted crane |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: 221000 Jiangsu city of Xuzhou Province Economic and Technological Development Zone of High Road No. 68 Patentee after: Xuzhou Heavy Machinery Co., Ltd. Address before: 221004 No. 165 Copper Mountain Road, Jiangsu, Xuzhou Patentee before: Xuzhou Heavy Machinery Co., Ltd. |