CN204265320U - A kind of hoisting crane fixing stepless luffing control system of auxiliary and hoisting crane - Google Patents
A kind of hoisting crane fixing stepless luffing control system of auxiliary and hoisting crane Download PDFInfo
- Publication number
- CN204265320U CN204265320U CN201420399416.0U CN201420399416U CN204265320U CN 204265320 U CN204265320 U CN 204265320U CN 201420399416 U CN201420399416 U CN 201420399416U CN 204265320 U CN204265320 U CN 204265320U
- Authority
- CN
- China
- Prior art keywords
- change
- over valve
- valve
- control system
- communicated
- 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.)
- Withdrawn - After Issue
Links
Abstract
The utility model relates to a kind of hoisting crane fixing stepless luffing control system of auxiliary and hoisting crane, and control system comprises electric proportional pressure-reducing valve, controllable capacity pump, the first change-over valve and for making the hydraulic ram of fixing auxiliary luffing; On the oil circuit of the first change-over valve between controllable capacity pump and hydraulic ram, controllable capacity pump export pressure oil 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.The hoisting crane that the utility model provides fixing auxiliary stepless luffing control system utilizes electric proportional pressure-reducing valve to realize control variable pump capacity, realizes the consecutive variations of controllable capacity pump discharge capacity, and speed adjustable range is wide, and fretting performance is good.
Description
Technical field
The utility model relates to engineering machinery field, is specifically related to a kind of hoisting crane fixing stepless luffing control system of auxiliary and 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 the important tool lengthening boom reach.And the fixing auxiliary of routine is only to realize the change of 0 °, 15 ° and 30 ° amplitude, when running into the narrow space of eminence, lifting cannot be realized, final giving that user installation is in place brings difficulty and dangerous greatly.
Electricity proportional pressure-reducing valve can flexible utilization current signal, and by changing size of current, and then the delivery pressure realizing electric proportional pressure-reducing valve changes along with curent change.
The stepless changing-breadth system of existing fixing auxiliary utilizes the oil pump of fixed displacement to hydraulic efficiency pressure system fuel feeding, and hydraulic oil is by electromagnetic valve and balance cock, and final promotion hydraulic ram 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 existing danger in oil cylinder.
Utility model content
The utility model provides a kind of hoisting crane fixing stepless luffing control system of auxiliary and hoisting crane, and main purpose of the present utility model realizes the infinite speed variation of hydraulic ram and the stepless luffing of fixing auxiliary angle.
For achieving the above object, the utility model provides following technical scheme:
The fixing stepless luffing control system of auxiliary of 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;
On the oil circuit of the first change-over valve between controllable capacity pump and hydraulic ram, controllable capacity pump export pressure oil 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 an embodiment of the present utility model, further, the oil inlet of the first change-over valve is communicated with the oil outlet of controllable capacity pump, return opening is communicated with fuel tank, the first actuator port is communicated with the rodless cavity of hydraulic ram, the second actuator port is communicated with the rod chamber of hydraulic ram.
According to an embodiment of the present utility model, further, control system also comprises the second change-over valve, on the oil circuit of the second change-over valve between controllable capacity pump and the first change-over valve;
Second change-over valve is bi-bit bi-pass solenoid directional control valve, and the oil inlet of the second change-over valve is communicated with the oil outlet of controllable capacity pump, the first actuator port is communicated with the oil inlet of the first change-over valve.
According to an embodiment of the present utility model, further, control system also comprises reel, on the oil circuit of reel between the first change-over valve and hydraulic ram.
According to an embodiment of the present utility model, further, control system also comprises balance cock, and the oil inlet of balance cock is communicated with the second actuator port of the first change-over valve, oil outlet is communicated with the rod chamber of hydraulic ram.
According to an embodiment of the present utility model, 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, the control port of balance cock of one-way throttle valve are communicated with, and the second hydraulic fluid port is communicated with the rodless cavity of hydraulic ram.
According to an embodiment of the present utility model, further, control system also comprises energy storage, compression indicator and the 3rd check valve, energy storage is communicated with the rod chamber of hydraulic ram, the oil inlet of the 3rd check valve is communicated with energy storage, oil outlet is communicated with the rod chamber of hydraulic ram, on the oil circuit of compression indicator between energy storage and the rod chamber of hydraulic ram.
According to an embodiment of the present utility model, further, control system also comprises the 3rd change-over valve and the 5th check valve, on the 3rd change-over valve and the oil circuit of the 5th check valve successively between energy storage and the first actuator port of the first change-over valve.
According to an embodiment of the present utility model, 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 first actuator port and the second actuator port of the first change-over valve of the first change-over valve.
The utility model additionally provides following technical scheme:
A kind of hoisting crane, hoisting crane comprises the fixing stepless luffing control system of auxiliary of hoisting crane as above.
Based on the arbitrary technical scheme in technique scheme, the utility model embodiment at least can produce following technique effect:
Because the fixing auxiliary stepless luffing control system of hoisting crane provided by the utility model comprises electric proportional pressure-reducing valve, controllable capacity pump, the first change-over valve and for making the hydraulic ram of fixing auxiliary luffing; On the oil circuit of the first change-over valve between controllable capacity pump and hydraulic ram, the pressure oil that controllable capacity pump exports 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 consecutive variations of controllable capacity pump discharge capacity, speed adjustable range is wide, and fretting performance is good.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present utility model, and form a application's part, schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the hydraulic schematic diagram of hoisting crane of the present utility model by 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 utility model by 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 utility model by the 3rd embodiment of the fixing stepless luffing control system of auxiliary.
Detailed description of the invention
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
It should be noted that: any technical characteristic in the present embodiment, any technical scheme is all one or more in the technical characteristic of plurality of optional or optional technical scheme, cannot exhaustive all alternative technical characteristics of the present utility model and alternative technical scheme in order to describe succinct to need in presents, also the embodiment being not easy to each technical characteristic all emphasizes that it is one of optional numerous embodiments, so those skilled in the art should know: any technical characteristic in the present embodiment and any technical scheme all do not limit protection domain of the present utility model, protection domain of the present utility model should comprise those skilled in the art and not pay the thinkable any alternate embodiments of creative work.
Hereafter convenient in order to describe, hereinafter alleged "left", "right", " on ", left and right, the upper and lower of D score and accompanying drawing itself is to consistent.
As shown in Figure 1, the utility model provides first embodiment of a kind of hoisting crane by the fixing stepless luffing control system of auxiliary, comprises electric proportional pressure-reducing valve 20, controllable capacity pump 21, first change-over valve 4 and for making the hydraulic ram 13 of fixing auxiliary luffing;
On the oil circuit of the first change-over valve 4 between controllable capacity pump 21 and hydraulic ram 13, controllable capacity pump 21 export pressure oil through the first change-over valve 4 input hydraulic pressure oil cylinder 13, the discharge capacity of the pressure oil output of electric proportional pressure-reducing valve 20 control variable pump 21.
This hoisting crane principle of work of fixing auxiliary stepless luffing control system is: the electric current controlling electric proportional pressure-reducing valve, thus 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 working process of fixing auxiliary stepless luffing control system is: the electric current of electric proportional pressure-reducing valve increases, and the delivery pressure of electric proportional pressure-reducing valve also increases, and the swash plate rotational angle of controllable capacity pump becomes large, and variable capacity of pump also increases.
In a specific embodiment of the present utility model, the curent change of electric proportional pressure-reducing valve drives the piston rod of piston cylinder to stretch, and the piston rod of piston cylinder stretches and drives the swash plate of controllable capacity pump to rotate, and the swash plate of controllable capacity pump rotates the displacement variation driving controllable capacity pump.
In a specific embodiment of the present utility model, 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; The swash plate rotational angle of controllable capacity pump 21 becomes large, and the discharge capacity of controllable capacity pump 21 also increases.
In a specific embodiment of the present utility model, the inside of the rodless cavity of first piston cylinder 1 has spring, spring connects bottom and the piston rod of rodless cavity, when 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 namely spring resets for the piston rod of first piston cylinder 1.
The electric current increase of electricity proportional pressure-reducing valve 20 realizes the rodless cavity oil-feed of first piston cylinder 1, the rodless cavity oil return of the second piston cylinder 2, can be obtained by the oil circuit connected relation of valve body and first piston cylinder 1, 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, improves system pressure, reduces hydraulic ram and each control cock, line size, improves fixing auxiliary lift heavy performance.
In a specific embodiment of the present utility model, the first change-over valve 4 can be three-position four-way electromagnetic directional valve, and meta slide valve function is P type;
First change-over valve 4 oil inlet is communicated with the oil outlet of controllable capacity pump 21, return opening is communicated with fuel tank, the first actuator port is communicated with the rodless cavity of hydraulic ram 13, the second actuator port is communicated with the rod chamber of hydraulic ram 13.
First change-over valve 4 has three kinds of control positioies, is left position, meta and right position respectively; When the first change-over valve 4 is in left position, oil inlet is communicated with the second actuator port, and return opening is communicated with the first actuator port; When the first change-over valve 4 is in meta, oil inlet ends, and 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 position, oil inlet is communicated with the first actuator port, and return opening is communicated with the second actuator port.
In a specific embodiment of the present utility model, control system can also comprise on the oil circuit of the second change-over valve 3, second change-over valve 3 between controllable capacity pump 21 and the first change-over valve 4;
Second change-over valve 3 is bi-bit bi-pass solenoid directional control valve, and the oil inlet of the second change-over valve 3 is communicated with the oil outlet of controllable capacity pump 21, the first actuator port is communicated with the oil inlet of the first change-over valve 4.
Second change-over valve 3 has two kinds of control positioies, is left position and right position respectively; When the second change-over valve 3 is in left position, oil inlet is communicated with the first actuator port; When the second change-over valve 3 is in right position, oil inlet is not communicated with the first actuator port.
When fixing auxiliary rises, along with the increase of handle electric current, electricity proportional pressure-reducing valve 20 electric current increases, controllable capacity pump 21 discharge capacity increases continuously, second change-over valve 3, the first left position of change-over valve 4 obtains electric, second change-over valve 3, first change-over valve 4 is all in left position, the hydraulic oil that controllable capacity pump 21 exports is through the oil inlet of the second change-over valve 3 and the first actuator port, 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.
When fixing auxiliary falls, along with the increase of handle electric current, electricity proportional pressure-reducing valve 20 electric current increases, controllable capacity pump 21 discharge capacity increases continuously, the second left position of change-over valve 3 obtains electric, the first right position of change-over valve 4 obtains electric, second change-over valve 3 is in left position, first change-over valve 4 is in right position, the hydraulic oil that controllable capacity pump 21 exports is through the oil inlet of the second change-over valve 3 and the first actuator port, 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 utility model, control system can also comprise the first check valve 22 and the second check valve 23, first check valve 22 and the second check valve 23 are arranged in parallel, the oil inlet of the first check valve 22 is communicated with fuel tank, oil outlet is communicated with the return opening of the first change-over valve 4, and the oil inlet of the second check valve 23 is communicated with the return opening of the first change-over valve 4, oil outlet is communicated with fuel tank.
In a specific embodiment of the present utility model, the oil inlet that control system can also comprise the first by pass valve 5, first by pass valve 5 is communicated with the first actuator port of the first change-over valve 4, return opening is communicated with fuel tank.
In a specific embodiment of the present utility model, the oil inlet that control system can also comprise the second by pass valve 6, second by pass valve 6 is communicated with the second actuator port of the first change-over valve 4, return opening is communicated with fuel tank.
In a specific embodiment of the present utility model, control system can also comprise reel 7, on the oil circuit of reel 7 between the first change-over valve 4 and hydraulic ram 13.
In a specific embodiment of the present utility model, control system can also comprise balance cock 15, and the oil inlet of balance cock 15 is communicated with the second actuator port of the first change-over valve 4, oil outlet is communicated with the rod chamber of hydraulic ram 13.
Balance cock 15 comprises check valve and flow regulating valve, and the oil inlet of check valve is communicated with the second actuator port of the first change-over valve 4, oil outlet is communicated with the rod chamber of hydraulic ram 13; The oil inlet of flow regulating valve is communicated with the rod chamber of hydraulic ram 13, oil outlet is communicated with the second actuator port of the first change-over valve 4; When balance cock 15 is in check valve position, the second actuator port of the first change-over valve 4 to the rod chamber oil-feed of hydraulic ram 13, realizes the contracting of hydraulic ram 13 by check valve; When balance cock 15 is in throttle valve position, the rod chamber of hydraulic ram 13 gives the second actuator port oil return of the first change-over valve 4 by flow regulating valve, realize stretching of hydraulic ram 13.
In a specific embodiment of the present utility model, control system can also comprise one-way throttle valve 14, first actuator port of the first hydraulic fluid port respectively with the first change-over valve 4, the control port of balance cock 15 of one-way throttle valve 14 are communicated with, and the second hydraulic fluid port is communicated with the rodless cavity of hydraulic ram 13.
One-way throttle valve 14 comprises check valve and damping, and the oil inlet of check valve is communicated with the rodless cavity of hydraulic ram 13, and oil outlet is communicated with the first actuator port of the first change-over valve 4, the control port of balance cock 15; First hydraulic fluid port of damping is communicated with the rodless cavity of hydraulic ram 13, the second hydraulic fluid port is communicated with the first actuator port of the first change-over valve 4; When the first actuator port of the first change-over valve 4 is by the rodless cavity oil-feed of damping to hydraulic ram 13, first actuator port of the first change-over valve 4 balances the control port oil supply of valve 15 simultaneously, balance cock 15 is made to be in throttle valve position, the rod chamber of hydraulic ram 13 gives the second actuator port oil return of the first change-over valve 4 by flow regulating valve, realize stretching of hydraulic ram 13; When the rodless cavity of hydraulic ram 13 gives 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, balance cock 15 is made to be in check valve position, second actuator port of the first change-over valve 4 to the rod chamber oil-feed of hydraulic ram 13, realizes the contracting of hydraulic ram 13 by check valve.
One-way throttle valve 14 can improve the control mouth pressure of balance cock 15, the debugging scope of balance cock is reduced, fixing auxiliary can either be kept steadily to rise, can play again the effect of debugging.
In a specific embodiment of the present utility model, control system can also comprise energy storage 10, compression indicator 11 and the 3rd check valve 16, energy storage 10 is communicated with the rod chamber of hydraulic ram 13, the oil inlet of the 3rd check valve 16 is communicated with energy storage 10, oil outlet is communicated with the rod chamber of hydraulic ram 13, on the oil circuit of compression indicator 11 between energy storage 10 and the rod chamber of hydraulic ram 13.
Compression indicator 11 is used for the pressure of the rod chamber measuring energy storage 10 and hydraulic ram 13 respectively.
In a specific embodiment of the present utility model, the oil inlet that control system can also comprise the 4th check valve the 17, four check valve 17 is communicated with the second actuator port of the first change-over valve 4, oil outlet is communicated with energy storage 10.
In a specific embodiment of the present utility model, control system can also comprise on the 3rd change-over valve 9 and the 5th check valve the 18, three change-over valve 9 and the oil circuit of the 5th check valve 18 successively between energy storage 10 and the first actuator port of the first change-over valve 4.
In a specific embodiment of the present utility model, 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 is communicated with energy storage 10, the first actuator port is communicated with the oil inlet of the 5th check valve 18, and the oil outlet of the 5th check valve 18 is communicated with the first actuator port of the first change-over valve 4.
3rd change-over valve 9 has two kinds of control positioies, is upper and the next respectively; When the 3rd change-over valve 9 is in upper, oil inlet is communicated with the first actuator port; When the second change-over valve 3 is in bottom, oil inlet is not communicated with the first actuator port.
When fixing auxiliary rises, along with the increase of handle electric current, electricity proportional pressure-reducing valve 20 electric current increases, controllable capacity pump 21 discharge capacity increases continuously, the second left position of change-over valve 3, first change-over valve 4 obtains electric, second change-over valve 3, first change-over valve 4 is all in left position, 3rd change-over valve 9 is in upper, the hydraulic oil of energy storage 10 to fuel tank, realizes 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 utility model, the oil inlet that control system can also comprise the 3rd by pass valve the 12, three by pass valve 12 is communicated with the rod chamber of hydraulic ram 13, return opening is communicated with the oil inlet of the 5th check valve 18.
In a specific embodiment of the present utility model, control system can also comprise the 6th check valve 19 and the 4th change-over valve the 8, six check valve 19 and the 4th change-over valve 8 successively on the oil circuit between first actuator port and the second actuator port of the first change-over valve 4 of the first change-over valve 4.
In a specific embodiment of the present utility model, 4th change-over valve 8 can be bi-bit bi-pass hand change over valve, the oil inlet of the 6th check valve 19 is communicated with the first actuator port of the first change-over valve 4, oil outlet is communicated with the oil inlet of the 4th change-over valve 8, and the first actuator port of the 4th change-over valve 8 is communicated with the second actuator port of the first change-over valve 4.
4th change-over valve 8 has two kinds of control positioies, is upper and the next respectively; When the 4th change-over valve 8 is in upper, oil inlet is not communicated with the first actuator port; When the 4th change-over valve 8 is in bottom, oil inlet is communicated with the first actuator port.
First change-over valve 4 must not be electric, first change-over valve 4 is in meta, 4th change-over valve 8 is in bottom, hydraulic oil one tunnel of the hydraulic oil of the rodless cavity of hydraulic ram 13 and the control port of balance cock 15 through the first actuator port of the first change-over valve 4 and return opening to fuel tank, another road of hydraulic oil of the hydraulic oil of the rodless cavity of hydraulic ram 13 and the control port of balance cock 15 is through the oil inlet of the 6th check valve 19 and oil outlet, the oil inlet of the 4th change-over valve 8 and the first actuator port, second actuator port of the first change-over valve 4 and return opening are to fuel tank, namely the hydraulic oil of the hydraulic oil of the rodless cavity of hydraulic ram 13 and the control port of balance cock 15 can pass through two-way oil circuit oil sump tank, realize the quick pressure releasing of the rodless cavity of hydraulic ram 13 when handle returns meta, the quick draining of hydraulic oil of the control port of balance cock 15, make balance cock quick closedown, be in unidirectional valve position.
The fixing stepless luffing control system of auxiliary of 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 constitute hydraulic ram pressurizer, prevent in hydraulic ram the danger of letting out and bringing.
As shown in Figure 2, the utility model additionally 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 changing the 3rd by pass valve 12 is identical with the first embodiment with all the other positions adding the 4th by pass valve 24, second embodiment.
Be specially: the oil inlet of the 3rd by pass valve 12 is communicated with energy storage 10, return opening is communicated with the oil inlet of the 5th check valve 18; The oil inlet that control system also comprises the 4th by pass valve the 24, four by pass valve 24 is communicated with the rod chamber of hydraulic ram 13, return opening is communicated with the first actuator port of the first change-over valve 4.
4th by pass valve 24 can prevent separately hydraulic ram detonation from occurring.
As shown in Figure 3, the utility model additionally 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 balance cock 15 being changed to the 7th check valve the 25, three embodiment are identical with the second embodiment.
Be specially: the oil inlet that control system can also comprise the 7th check valve the 25, seven check valve 25 is communicated with the second actuator port of the first change-over valve 4, oil outlet is communicated with the rod chamber of hydraulic ram 13.
The utility model additionally provides a kind of hoisting crane, and hoisting crane comprises the fixing stepless luffing control system of auxiliary of hoisting crane as above.
The other parts of hoisting crane can, with reference to prior art, no longer be launched to describe herein.
Above-mentioned arbitrary technical scheme disclosed in the utility model unless otherwise stated, if the number range of it discloses, so disclosed number range is preferred number range, anyly it should be appreciated by those skilled in the art: preferred number range is only the numerical value that in many enforceable numerical value, technique effect is obvious or representative.Because numerical value is more, cannot be exhaustive, so the utility model just discloses component values with casehistory the technical solution of the utility model, and the above-mentioned numerical value enumerated should not form restriction the utility model being created to protection domain.
If employ the word such as " first ", " second " herein to limit parts, those skilled in the art should know: the use of " first ", " second " is only used to be convenient to describe carry out difference as not having outside Stated otherwise to parts, the implication that above-mentioned word is not special.
Simultaneously, if above-mentioned the utility model discloses or relate 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 releasably be fixedly connected with (such as using bolt or screw to connect), also can be understood as: to be non-removablely fixedly connected with (such as rivet, weld), certainly, connection fastened to each other also can be replaced by integral type structure (such as use foundry technique is integrally formed create) (obviously cannot adopt except integrally formed technique).
In addition, apply in arbitrary technical scheme disclosed in above-mentioned the utility model for represent position relationship or shape term unless otherwise stated its implication comprise approximate with it, similar or close state or shape.Arbitrary parts that the utility model provides both can be assembled by multiple independent component part, and also can be one of the forming manufacture technics separate part out.
Finally should be noted that: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit; Although be described in detail the utility model with reference to preferred embodiment, those of ordinary skill in the field have been to be understood that: still can modify to detailed description of the invention of the present utility model or carry out equivalent replacement to portion of techniques feature; And not departing from the spirit of technical solutions of the utility model, it all should be encompassed in the middle of the technical scheme scope of the utility model request protection.
Claims (10)
1. the fixing stepless luffing control system of auxiliary of 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;
On the oil circuit of described first change-over valve between described controllable capacity pump and described hydraulic ram, the pressure oil that described controllable capacity pump exports inputs described hydraulic ram through described 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 oil inlet of the first change-over valve is communicated with the oil outlet of controllable capacity pump, return opening is communicated with fuel tank, the first actuator port is communicated with the rodless cavity of hydraulic ram, the second actuator port is communicated with the rod chamber of hydraulic ram.
3. control system according to claim 1 and 2, is characterized in that,
Described control system also comprises the second change-over valve, on the oil circuit of the second change-over valve between controllable capacity pump and the first change-over valve;
Second change-over valve is bi-bit bi-pass solenoid directional control valve, and the oil inlet of the second change-over valve is communicated with the oil outlet of controllable capacity pump, the first actuator port is communicated with the oil inlet of the first change-over valve.
4. control system according to claim 1 and 2, is characterized in that,
Described control system also comprises reel, on the oil circuit of reel 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 oil inlet of balance cock is communicated with the second actuator port of the first change-over valve, oil outlet is communicated with the rod chamber of hydraulic ram.
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, the control port of balance cock of one-way throttle valve are communicated with, and the second hydraulic fluid port is communicated with the rodless cavity of hydraulic ram.
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, energy storage is communicated with the rod chamber of hydraulic ram, the oil inlet of the 3rd check valve is communicated with energy storage, oil outlet is communicated with the rod chamber of hydraulic ram, on the oil circuit of compression indicator 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, on the 3rd change-over valve and the oil circuit of the 5th check valve successively 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 first actuator port and the second actuator port of the first change-over valve 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 of hoisting crane described in any one of claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420399416.0U CN204265320U (en) | 2014-07-18 | 2014-07-18 | A kind of hoisting crane fixing stepless luffing control system of auxiliary and hoisting crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420399416.0U CN204265320U (en) | 2014-07-18 | 2014-07-18 | A kind of hoisting crane fixing stepless luffing control system of auxiliary and hoisting crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204265320U true CN204265320U (en) | 2015-04-15 |
Family
ID=52800199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420399416.0U Withdrawn - After Issue CN204265320U (en) | 2014-07-18 | 2014-07-18 | A kind of hoisting crane fixing stepless luffing control system of auxiliary and hoisting crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204265320U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104071709A (en) * | 2014-07-18 | 2014-10-01 | 徐州重型机械有限公司 | Fixed fly jib stepless amplitude-variation control system for crane and crane |
| 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 |
-
2014
- 2014-07-18 CN CN201420399416.0U patent/CN204265320U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104071709A (en) * | 2014-07-18 | 2014-10-01 | 徐州重型机械有限公司 | Fixed fly jib stepless amplitude-variation control system for crane and crane |
| 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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104071709A (en) | Fixed fly jib stepless amplitude-variation control system for crane and crane | |
| CN107420384B (en) | System is used in the storage of lifting device gravitional force P-V | |
| CN102874697B (en) | Hydraulic system for controlling amplitude variation of arm support and crane | |
| CN103244496B (en) | Rotary control valve group, revolution hydraulic control system and hoist | |
| CN102628459B (en) | Multi-oil-cylinder synchronous control system and engineering vehicle | |
| CN202833008U (en) | Concrete pump and hydraulic system thereof | |
| CN102562686A (en) | Hydraulic system for double-acting supercharger | |
| 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 | |
| CN204265320U (en) | A kind of hoisting crane fixing stepless luffing control system of auxiliary and hoisting crane | |
| CN104444816B (en) | The hydraulic control system of a kind of hoisting machinery and hoisting machinery | |
| CN201525715U (en) | Crawler crane anti-back-tilting hydraulic system with function of switching high and low voltage | |
| CN203754318U (en) | Crane winching hydraulic system and crane | |
| CN203796641U (en) | Stepless speed regulating hydraulic system of hydraulic machine | |
| CN103016432B (en) | Secondary relief, hoist fall width hydraulic system and hoist | |
| CN101839264A (en) | Load sensing electro-hydraulic proportional multi-way reversing oil circuit | |
| CN104828702A (en) | Crane, reversing control system, and oil supply apparatus thereof | |
| CN106194680A (en) | The axial plunger pump installation of a kind of high accuracy electric proportional control and control method | |
| CN203637648U (en) | Hydraulic working system of trailer | |
| CN203532367U (en) | Multi-gear power control variable displacement piston pump | |
| CN204873719U (en) | Quick -witted hydraulic control system lifts | |
| CN102367818A (en) | Special integrated group valve for electrohydraulic push rod | |
| CN102536924A (en) | Single-hydraulic cylinder single-acting hydraulic system of supercharger | |
| CN203717509U (en) | Lorry-mounted crane multi-way reversing device and straight-arm lorry-mounted crane |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150415 Effective date of abandoning: 20160706 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20150415 Effective date of abandoning: 20160706 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |