CN202967905U - Counterweight mount control device, liquid control system and mobile crane - Google Patents
Counterweight mount control device, liquid control system and mobile crane Download PDFInfo
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- CN202967905U CN202967905U CN 201220673869 CN201220673869U CN202967905U CN 202967905 U CN202967905 U CN 202967905U CN 201220673869 CN201220673869 CN 201220673869 CN 201220673869 U CN201220673869 U CN 201220673869U CN 202967905 U CN202967905 U CN 202967905U
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- 239000007788 liquid Substances 0.000 title claims abstract description 13
- 230000001105 regulatory Effects 0.000 claims abstract description 33
- 230000001276 controlling effect Effects 0.000 claims abstract description 12
- 239000012530 fluid Substances 0.000 claims description 19
- 230000001939 inductive effect Effects 0.000 claims description 10
- 230000001681 protective Effects 0.000 claims description 5
- 239000003921 oil Substances 0.000 description 128
- 238000010586 diagram Methods 0.000 description 11
- 239000010720 hydraulic oil Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 230000001976 improved Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000000630 rising Effects 0.000 description 3
- 230000000875 corresponding Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003028 elevating Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 230000001737 promoting Effects 0.000 description 1
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Abstract
The utility model relates to a counterweight mount control device, a liquid control system and a mobile crane. The counterweight mount control device comprises a remote control box control valve which comprises a damping speed regulating structure and a revolution pilot control structure, a valve body comprises a first valve body oil inlet which is communicated with the damping speed regulating structure and the revolution pilot control structure, a first valve body oil returning port communicated with an oil returning port of the revolution pilot control structure, a first valve body oil outlet communicated with an oil outlet of the damping speed regulating structure, a second valve body oil outlet and a third valve body oil outlet which are respectively communicated with two oil outlets of the revolution pilot control structure. According to the counterweight mount control device, the liquid control system and the mobile crane, the rotating speed of a revolution system is regulated through the damping speed regulating structure, the problem that a switching value cannot be adopted by the liquid control system for controlling the revolution fine motion for a long time is solved, the revolution pilot control structure is used for lowering the delay of the system, thus being convenient for a user to operate, and accidents caused by delay can be avoided.
Description
Technical field
The utility model relates to engineering machinery field, relates in particular to a kind of counterweight and articulates control setup, hydraulic control system and runabout crane.
Background technology
For improving the lifting performance of medium and small position ton hoisting crane, the especially load-carrying ability of long-armed operating mode in the lifting, the Combined balance weight of having quoted hoister in large tonnage on medium and small tonnage hoisting crane articulates technology.Combined balance weight articulates technology with respect to the fixed type counterweight, Combined balance weight is comprised of several balance weight body independently, when being combined into different weight, thickness is different, each combination all needs relative positioning, fixing, guaranteeing that counterweight uses safely and reliably, and then the lift heavy performance of performance under crane arm significantly.Therefore, before carrying out hoisting operation, need to require to select different combinations of weights according to hoisting operation.
For convenience of articulating of counterweight, designed at present by remote-control box and controlled in the wings the revolution of turntable and the mode of rising and falling of control counterweight.This control method realizes on hoister in large tonnage, because large tonnage product generally adopts the method for electric proportional control, control accuracy is high, can steplessly realize that by the size of controlling electric current rotation of rotary table controls.Be hydraulic control system and medium and small tonnage product generally adopts, remote-control box is controlled a constant pressure by switching value, and this constant pressure is used for promoting the valve rod commutation of rotary control valve, and then realizes the revolution action.
The method that existing a kind of hydraulic control platform hoisting crane adopts switching value to control constant pressure realizes that remote-control box is illustrated by Fig. 1-3 respectively hydraulic schematic diagram, electrical schematic diagram and the remote-control box diagram of work of the control program of turntable.In this scheme, when needs use remote-control box 6 to turn round to articulate with counterweight, close switch S1, electromagnetic valve Y1 and Y2 are got electric, the pressure that promotes the commutation of rotary control valve valve rod this moment is provided by the reducing valve in the 3rd valve piece 3, the size of commutation pressure is set by reducing valve, and the different aperture of the corresponding valve rod of different setting pressures is also with regard to corresponding different speed of revolutions.
In remote-control box 6, revolution switch S 2 is pulled to the left or to the right, and the electromagnetic valve Y6a in the 3rd valve piece 3 or Y6b get electric, controls rotary system 4 and turns left or turn right.When carrying out the counterweight rising and dropping control, counterweight direction switch S3 in remote-control box 6 is pulled to the left or to the right, the electromagnetic valve Y5 of the first valve piece 1 gets electric, and electromagnetic valve Y3 or the Y4 of second valve piece 2 get electric.Y5 gets electric rear the first valve piece 1 cut-out and enters rotating hydraulic oil, makes hydraulic oil enter the counterweight oil circuit control.Electromagnetic valve Y3 gets electric control weight balancing oil cylinder 5 and rises, and electromagnetic valve Y4 gets electric control weight balancing oil cylinder 5 and descends.
In above scheme, it is larger that the constant pressure of controlling due to switching value is affected by temperature, accuracy of manufacture, engine speed and gear type pump pulsation, can not guarantee constant pressure, has larger pressure divergence; And for medium and small tonnage product, rotary control system mostly is again the valve rod throttling governing, and flow gain is large, when deviation appears in control presssure, revolution is moved or is cut in and out, and perhaps speed of revolutions is too fast, makes the poor-performing of this control method practical application.
The utility model content
The purpose of this utility model is to propose a kind of counterweight to articulate control setup, hydraulic control system and runabout crane, can solve hydraulic control system and can't adopt switching value to control the problem of revolution fine motion.
For achieving the above object, the utility model provides a kind of counterweight to articulate control setup, comprise the remote-control box control cock, described remote-control box control cock comprises: the damping speed regulating structure that the break-make of utilizing a plurality of dampings in parallel is regulated the fluid flow of output and the revolution pilot control structure that the pilot control pressure oil liquid is provided to rotary system; And the valve body of described remote-control box control cock has:
The first valve body oil inlet communicates with the oil inlet of described damping speed regulating structure and revolution pilot control structure;
The first valve body return opening communicates with the return opening of described revolution pilot control structure;
The first valve body oil outlet communicates with the oil outlet of described damping speed regulating structure;
The second valve body oil outlet and the 3rd valve body oil outlet communicate with two oil outlets of described revolution pilot control structure respectively.
Further, described damping speed regulating structure comprises: first throttle damping, second section flow damping and the first solenoid directional control valve, described second section flow damping and the first solenoid directional control valve series connection and in parallel with described first throttle damping; Under the different operating state, by the whether electric break-make of controlling the pressure oil liquid of described second section flow damping that gets of described the first solenoid directional control valve.
Further, described revolution pilot control structure comprises: the 3rd throttle, the first reducing valve and the second solenoid directional control valve, the oil inlet of described the first reducing valve communicates with described the 3rd throttle, the oil outlet of described the first reducing valve communicates with the oil inlet of described the second solenoid directional control valve, the return opening of the drain tap of described the first reducing valve and described the second solenoid directional control valve communicates with described the first valve body return opening, and two oil outlets of described the second solenoid directional control valve communicate with described the second valve body oil outlet and the 3rd valve body oil outlet respectively; Under the different operating state, the oil outlet of controlling described the first reducing valve by the spool position change of described the second solenoid directional control valve communicates with described the second valve body oil outlet or the 3rd valve body oil outlet.
Further, described remote-control box control cock also comprises the electromagnetic switch structure, described electromagnetic switch structure comprises: the 3rd solenoid directional control valve, the 4th solenoid directional control valve and the 5th solenoid directional control valve, described the 3rd solenoid directional control valve is connected on oil circuit between the oil inlet of described the first valve body oil inlet and described damping speed regulating structure and revolution pilot control structure, the break-make of oil circuit control; Described the 4th solenoid directional control valve and the 5th solenoid directional control valve are connected on respectively on two oil outlets and the oil circuit between described the second valve body oil outlet and the 3rd valve body oil outlet of described the second solenoid directional control valve, the break-make of oil circuit control.
Further, also comprise the counterweight control cock, described counterweight control cock comprises: the 6th solenoid directional control valve and the 7th solenoid directional control valve, an oil outlet of described the 6th solenoid directional control valve communicates with the oil inlet of described the 7th solenoid directional control valve, described the 6th solenoid directional control valve has the inductive position detector switch, arrive the position of described inductive position detector switch at the spool of described the 6th solenoid directional control valve, triggers described the 3rd solenoid directional control valve and connect described the first valve body oil inlet and described damping speed regulating structure and turn round oil circuit between the oil inlet of pilot control structure;
The valve body of described counterweight control cock has:
The second valve body oil inlet communicates with the oil inlet of described the 6th solenoid directional control valve;
The second valve body return opening communicates with another oil outlet of described the 6th solenoid directional control valve and the return opening of described the 7th solenoid directional control valve;
The 4th valve body oil outlet and the 5th valve body oil outlet communicate with two oil outlets of described the 7th solenoid directional control valve respectively.
Further, described counterweight control cock and described remote-control box control cock are integrated in a valve body, perhaps adopt split type valve piece or Sandwich plate valve mode to make up.
Further, also comprise overflowing protective structure at valve inner.
for achieving the above object, the utility model provides a kind of hydraulic control system that articulates control for counterweight, comprise: rotation of rotary table system and weight balancing oil cylinder with revolution proportional control valve, wherein, also comprise high-capacity pump, low-capacity pump and aforesaid counterweight articulate control setup, the first valve body oil inlet that described counterweight articulates control setup communicates with described low-capacity pump, described the first valve body oil outlet communicates with the oil inlet of described revolution proportional control valve, described the second valve body oil outlet and the 3rd valve body oil outlet communicate with left and right guide's hydraulic fluid port of described revolution proportional control valve respectively.
Further, the second valve body oil inlet that described counterweight articulates control setup communicates with described high-capacity pump, and described the 4th valve body oil outlet and the 5th valve body oil outlet communicate with rod chamber and the rodless cavity of described weight balancing oil cylinder respectively.
For achieving the above object, the utility model provides a kind of runabout crane, comprising the aforesaid hydraulic control system that articulates control for counterweight.
Based on technique scheme, the utility model is controlled the flow of the pressure oil liquid of output by the damping speed regulating structure in the remote-control box control cock, regulate the speed of revolutions of rotary system with this, solved for a long time that hydraulic control system can't adopt switching value to control the problem of revolution fine motion, made the successful Application of Combined balance weight technology on medium and small tonnage assurance is provided; Utilize revolution pilot control structure that the pilot pressure fluid of elevated pressures can be provided to rotary system, controlling the valve rod of the revolution proportional control valve in rotary system opens fully, thereby effectively reduce the delay of system, user-friendly, and the accident that can avoid causing due to delay occurs.In another embodiment, by in the counterweight control cock with the solenoid directional control valve of inductive position detector switch, realized the sequence control strategy, after guaranteeing the complete oil return of large pump, then carry out little pump and build pressure, improved the safety and reliability of this control system; And when carrying out low speed revolution operation, the direct oil return of high-capacity pump, and adopt the method effectively reduction system heating of little oil pump feed, energy efficient.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present utility model, consists of the application's a part, and illustrative examples of the present utility model and explanation thereof are used for explaining the utility model, do not consist of improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is that the method that existing hydraulic control platform hoisting crane adopts switching value to control constant pressure realizes that remote-control box is to the hydraulic schematic diagram of the control program of turntable.
Fig. 2 is that the method that existing hydraulic control platform hoisting crane adopts switching value to control constant pressure realizes that remote-control box is to the electrical schematic diagram of the control program of turntable.
Fig. 3 is that the method that existing hydraulic control platform hoisting crane adopts switching value to control constant pressure realizes that remote-control box is to the remote-control box diagram of work of the control program of turntable.
Fig. 4 is the structural representation that the utility model counterweight articulates an embodiment of control setup.
Fig. 5 is the structural representation that the utility model counterweight articulates another embodiment of control setup.
Fig. 6 is the structural representation that the utility model counterweight articulates the another embodiment of control setup.
Fig. 7 is the structural representation that the utility model counterweight articulates counterweight control cock in the embodiment again of control setup.
Fig. 8 is the hydraulic schematic diagram of an embodiment of the utility model hydraulic control system.
Fig. 9 is the electrical schematic diagram of Fig. 8 embodiment.
Figure 10 is the remote-control box diagram of work of Fig. 8 embodiment.
The specific embodiment
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
As shown in Figure 4, articulate the structural representation of an embodiment of control setup for the utility model counterweight.In the present embodiment, configuration articulates control setup and comprises the remote-control box control cock, and this remote-control box control cock comprises speed regulating structure and revolution pilot control structure.Wherein the break-make of a plurality of dampings of speed regulating structure utilization parallel connection is regulated the fluid flow of output, and revolution pilot control structure can provide the pilot control pressure oil liquid to rotary system.
The damping speed regulating structure comprises: throttle J1, throttle J2 and solenoid directional control valve Y71, wherein throttle J1 and solenoid directional control valve Y71 series connection and in parallel with throttle J2.Under the different operating state, can by solenoid directional control valve Y71 the whether electric break-make of controlling the pressure oil liquid of throttle J1, and then change the fluid flow of exporting by the damping speed regulating structure.
Revolution pilot control structure comprises: throttle J3, reducing valve JY1 and solenoid directional control valve Y2a or Y2b, and the oil inlet of reducing valve JY1 communicates with throttle J3, and the oil outlet of reducing valve JY1 communicates with the oil inlet of solenoid directional control valve Y2a or Y2b.
The valve body of remote-control box control cock has: valve body oil inlet P 1, valve body oil return inlet T 1, valve body oil outlet A1 and valve body oil outlet B1, B2.Valve body oil inlet P 1 communicates with the oil inlet of damping speed regulating structure and revolution pilot control structure.Valve body oil return inlet T 1 communicates with the return opening of revolution pilot control structure, and the return opening of revolution pilot control structure comprises the drain tap of reducing valve JY1 and the return opening of solenoid directional control valve Y2a or Y2b.Valve body oil outlet A1 communicates with the oil outlet of damping speed regulating structure.Valve body oil outlet B1, B2 communicate with two oil outlets of revolution pilot control structure respectively, and two oil outlets of revolution pilot control structure are two oil outlets of solenoid directional control valve Y2a or Y2b.Under the different operating state, the oil outlet of controlling reducing valve JY1 by spool position (Y2a or Y2b the get electric) change of solenoid directional control valve communicates with valve body oil outlet B1 or valve body oil outlet B2.
In technique scheme, the valve body oil outlet can be communicated with the revolution proportional control valve of rotary system, and valve port standard-sized sheet, the break-make of the throttle in parallel in the overdamping speed regulating structure can change the fluid flow that outputs to rotary system, and need not to adopt the mode of existing switching value control ratio valve valve port opening, thereby can realize good revolution fine motion control effect.The present embodiment has adopted two throttles in parallel, can realize the fluid flow of two kinds of outputs by the break-make of controlling throttle, and then realize the different rotating speeds of rotary system.In other embodiments, other forms of throttle structure or the different throttle of quantity can be set also, as long as can utilize the break-make of a plurality of dampings in parallel to realize the fluid flow of output is regulated.
In revolution pilot control structure, throttle and reducing valve coordinate to obtain to wish the pilot pressure fluid that obtains.the pilot pressure fluid that revolution pilot control structure can have elevated pressures to the left and right guide's hydraulic fluid port input in the revolution proportional control valve in rotary system, the valve rod that the pilot pressure fluid of this elevated pressures can be realized turning round in proportional control valve commutates fast and completely, the valve port standard-sized sheet, adopt the mode of switching value control ratio valve valve port opening to be subject to temperature with regard to having eliminated prior art like this, accuracy of manufacture, engine speed and the gear type pump pulsation impact on factors such as valve port opening, but also effectively eliminate or reduce time delay in operating process, be user-friendly to, avoid occuring because delay causes accident.
As shown in Figure 5, articulate the structural representation of another embodiment of control setup for the utility model counterweight.Compare with a upper embodiment, the present embodiment is also further integrated electromagnetic switch structure in the remote-control box control cock.The electromagnetic switch structure comprises: solenoid directional control valve Y72, solenoid directional control valve Y73 and solenoid directional control valve Y74, solenoid directional control valve Y72 is connected on oil circuit between the oil inlet of valve body oil inlet P 1 and damping speed regulating structure and revolution pilot control structure, the break-make of oil circuit control.Solenoid directional control valve Y73 and solenoid directional control valve Y74 are connected on respectively on two oil outlets and the oil circuit between valve body oil outlet B1 and valve body oil outlet B2 of solenoid directional control valve Y2a and Y2b, the break-make of oil circuit control.
In Fig. 5 embodiment, the oil return of solenoid directional control valve Y72, Y73, Y74 can be completed by other valve body return openings (being T2, T3, T4) of remote-control box control cock respectively.
In the present embodiment, solenoid directional control valve Y72 can cut-off control to the pressure oil liquid that is input to the remote-control box control cock, in order to start or close speed governing and the revolution pilot control function of remote-control box control cock.Solenoid directional control valve Y73 and solenoid directional control valve Y74 can be respectively to controlling to the oil circuit break-make of left and right guide's hydraulic fluid port.
As shown in Figure 6, articulate the structural representation of the another embodiment of control setup for the utility model counterweight.Compare with a upper embodiment; the present embodiment also comprises overflowing protective structure; this overflowing protective structure comprises by pass valve YL1; can be arranged on oil outlet and the damping speed regulating structure of solenoid directional control valve Y72 and turn round between the oil inlet of pilot control structure; its drain tap communicates with valve body oil return inlet T 5, realizes that the pressure of oil circuit internal pressure fluid is controlled.Also comprise in the present embodiment other throttles J4 and reducing valve, check valve etc., due to irrelevant with emphasis of the present utility model, just no longer describe in detail here.
The counterweight of introducing in front articulates in control setup embodiment, mainly realized the control of rotary system by the remote-control box control cock, articulate in control in order better to be applied to counterweight, can also increase the rising and dropping control that the counterweight control cock realizes weight balancing oil cylinder.As shown in Figure 7, articulate the structural representation of counterweight control cock in the embodiment again of control setup for the utility model counterweight.Counterweight control cock and the remote-control box control cock of introducing previously can be integrated in a valve body, also can adopt split type valve piece or Sandwich plate valve mode to make up.
The counterweight control cock comprises solenoid directional control valve Y1d, Y1c and solenoid directional control valve Y1a, Y1b, the oil outlet of solenoid directional control valve Y1c communicates with the oil inlet of solenoid directional control valve Y1a, solenoid directional control valve Y1d has the inductive position detector switch, arrive the position of inductive position detector switch at the spool of solenoid directional control valve Y1d, the oil circuit between the oil inlet of the solenoid directional control valve Y72 connection valve body oil inlet P 1 of triggering remote-control box control cock and damping speed regulating structure and revolution pilot control structure.The valve body of counterweight control cock has: valve body oil inlet P 2, valve body oil return inlet T 6 and valve body oil outlet B3, B4.Valve body oil inlet P 2 communicates with the oil inlet of solenoid directional control valve Y1d, and valve body oil return inlet T 6 communicates with the oil outlet of solenoid directional control valve Y1d and the return opening of solenoid directional control valve Y1b.Valve body oil outlet B3, B4 communicate with two oil outlets of solenoid directional control valve Y1a, Y1b respectively.
Solenoid directional control valve Y1d has the inductive position detector switch, utilize weight balancing oil cylinder landing process that the inductive position detector switch can control counterweight control cock and remote-control box control cock and the revolution action of rotary system to switch, realize the sequence control strategy, when the complete oil return of pressure oil liquid of counterweight control cock, just make build-up pressure in the remote-control box control cock, thereby improved the safety and reliability of control system.
Also comprise overflowing protective structure in the another kind of implementation of counterweight control cock, specifically comprise by pass valve YL2 and by pass valve YL3, wherein by pass valve YL2 is used for carrying out the system pressure protection, and by pass valve YL3 plays the protecting against shock function in the counterweight control cock.
Below by Fig. 8, one embodiment of the utility model hydraulic control system is carried out the explanation of hydraulic principle, the hydraulic control system that counterweight articulates control that is used in Fig. 8 comprises: have rotation of rotary table system 4 and the weight balancing oil cylinder 5 of revolution proportional control valve, comprise that also high-capacity pump, low-capacity pump and the counterweight of introducing previously articulate control setup.Counterweight articulates control setup and comprises remote-control box control cock 7 and counterweight control cock 8, has the oil circuit that communicates between remote-control box control cock 7 and counterweight control cock 8.The high-capacity pump here, low-capacity pump are both uninterrupted relations after relatively.
Describe in conjunction with Fig. 4-7, the valve body oil inlet P 1 that counterweight articulates control setup communicates with low-capacity pump (being shown little pump in figure), valve body oil outlet A1 communicates with the oil inlet of revolution proportional control valve, and valve body oil outlet B1 and valve body oil outlet B2 communicate with left and right guide's hydraulic fluid port of revolution proportional control valve respectively.The valve body oil inlet P 2 that counterweight articulates control setup communicates with high-capacity pump (being shown large pump in figure), and valve body oil outlet B3 and valve body oil outlet B4 communicate with rod chamber and the rodless cavity of weight balancing oil cylinder 5 respectively.
Fig. 9 and Figure 10 have provided respectively electrical schematic diagram and the remote-control box diagram of work of Fig. 8 embodiment.In conjunction with Fig. 4-Figure 10, being used for counterweight, to articulate the example of working process of hydraulic control system of control as follows:
When needs use remote-control box 6 ' to turn round to articulate with counterweight, close switch S11, solenoid directional control valve Y73, Y74 and Y1d simultaneously electric.Solenoid directional control valve Y1d get electric after, high-capacity pump is supplied with the direct oil sump tank of hydraulic oil of rotary system 4.Solenoid directional control valve Y1d is with the inductive position detector switch, only have after spool moves to left position, trigger travel switch S12 closed, make the electromagnetic valve Y72 in remote-control box control cock 7 get electric, low-capacity pump was just understood fuel feeding and was entered rotary system 4 this moment, realized the switching of small-large flow oil pump feed.At this moment, the fluid that high-capacity pump is supplied all flows back to fuel tank by solenoid directional control valve Y1d, has so just realized the sequence control strategy, after guaranteeing the complete oil return of high-capacity pump, then carries out little pump and builds pressure, has improved the safety and reliability of control system.In addition, when turning round operation, utilize low-capacity pump to carry out the control of rotary system than utilizing high-capacity pump control, the heating of reduction system effectively, energy efficient.
In remote-control box 6 ', revolution switch S 13 is pulled to the left or to the right, solenoid directional control valve Y2a(in remote-control box control cock 7 turns left) or Y2b(turn right) electric, control the rotary control valve valve rod commutation in pilot pressure fluid promotion rotary system 4, realize left-hand revolution or dextrad revolution.Owing to adopting higher control presssure, even there is pressure divergence, also can make valve rod commutate fully, the valve port standard-sized sheet.Therefore eliminated temperature, accuracy of manufacture, engine speed and the gear type pump pulsation impact on valve port opening.The speed of rotation of rotary table is determined by the flow that enters rotary control valve fully, therefore by the damping speed regulating structure in remote-control box control cock 7, just can realize the control to speed of revolutions.Can obtain two kinds of different throttle combinations by solenoid directional control valve Y71, realize two kinds of control rates.Under normal condition, electromagnetic valve Y71 must not be electric, carries out the low speed revolution; When the speed of revolutions select switch S14 on remote-control box 6 ' is pulled the right, solenoid directional control valve Y71 gets electric, carries out high speed rotary.Owing to adopting higher pilot control pressure, can realize that the valve rod of rotary control valve commutates fast, the action of eliminating in operating process postpones.
When carrying out the counterweight elevating control, counterweight direction switch S15 in remote-control box 6 ' is pulled to the left or to the right, solenoid directional control valve Y1c is got electric, solenoid directional control valve Y1a or Y1b get electric.Solenoid directional control valve Y1c get electric after, the hydraulic oil of high-capacity pump enters weight balancing oil cylinder 5.If it is electric that solenoid directional control valve Y1a gets, the valve piece moves to left, and hydraulic oil enters the rod chamber of weight balancing oil cylinder 5, promotes counterweight; When solenoid directional control valve Y1b gets electricly, the valve piece moves to right, and hydraulic oil enters the rodless cavity of weight balancing oil cylinder 5, and counterweight is descended.
The hydraulic control system that articulates control for counterweight described above can be applied to all kinds of construction machinery and equipments that need counterweight to articulate control, especially be fit to be applied in runabout crane, can realize good controller performance, overcome present runabout crane hydraulic control system and can't adopt switching value to control the problem of revolution fine motion.
Should be noted that at last: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit; Although with reference to preferred embodiment, the utility model is had been described in detail, those of ordinary skill in the field are to be understood that: still can modify or the part technical characterictic is equal to replacement the specific embodiment of the present utility model; And not breaking away from the spirit of technical solutions of the utility model, it all should be encompassed in the middle of the technical scheme scope that the utility model asks for protection.
Claims (10)
1. a counterweight articulates control setup, it is characterized in that, comprise the remote-control box control cock, described remote-control box control cock comprises: the damping speed regulating structure that the break-make of utilizing a plurality of dampings in parallel is regulated the fluid flow of output and the revolution pilot control structure that the pilot control pressure oil liquid is provided to rotary system; And the valve body of described remote-control box control cock has:
The first valve body oil inlet communicates with the oil inlet of described damping speed regulating structure and revolution pilot control structure;
The first valve body return opening communicates with the return opening of described revolution pilot control structure;
The first valve body oil outlet communicates with the oil outlet of described damping speed regulating structure;
The second valve body oil outlet and the 3rd valve body oil outlet communicate with two oil outlets of described revolution pilot control structure respectively.
2. counterweight according to claim 1 articulates control setup, it is characterized in that, described damping speed regulating structure comprises: first throttle damping, second section flow damping and the first solenoid directional control valve, described second section flow damping and the first solenoid directional control valve series connection and in parallel with described first throttle damping; Under the different operating state, by the whether electric break-make of controlling the pressure oil liquid of described second section flow damping that gets of described the first solenoid directional control valve.
3. counterweight according to claim 1 and 2 articulates control setup, it is characterized in that, described revolution pilot control structure comprises: the 3rd throttle, the first reducing valve and the second solenoid directional control valve, the oil inlet of described the first reducing valve communicates with described the 3rd throttle, the oil outlet of described the first reducing valve communicates with the oil inlet of described the second solenoid directional control valve, the return opening of the drain tap of described the first reducing valve and described the second solenoid directional control valve communicates with described the first valve body return opening, two oil outlets of described the second solenoid directional control valve communicate with described the second valve body oil outlet and the 3rd valve body oil outlet respectively, under the different operating state, the oil outlet of controlling described the first reducing valve by the spool position change of described the second solenoid directional control valve communicates with described the second valve body oil outlet or the 3rd valve body oil outlet.
4. counterweight according to claim 3 articulates control setup, it is characterized in that, described remote-control box control cock also comprises the electromagnetic switch structure, described electromagnetic switch structure comprises: the 3rd solenoid directional control valve, the 4th solenoid directional control valve and the 5th solenoid directional control valve, described the 3rd solenoid directional control valve is connected on oil circuit between the oil inlet of described the first valve body oil inlet and described damping speed regulating structure and revolution pilot control structure, the break-make of oil circuit control; Described the 4th solenoid directional control valve and the 5th solenoid directional control valve are connected on respectively on two oil outlets and the oil circuit between described the second valve body oil outlet and the 3rd valve body oil outlet of described the second solenoid directional control valve, the break-make of oil circuit control.
5. counterweight according to claim 4 articulates control setup, it is characterized in that, also comprise the counterweight control cock, described counterweight control cock comprises: the 6th solenoid directional control valve and the 7th solenoid directional control valve, an oil outlet of described the 6th solenoid directional control valve communicates with the oil inlet of described the 7th solenoid directional control valve, described the 6th solenoid directional control valve has the inductive position detector switch, arrive the position of described inductive position detector switch at the spool of described the 6th solenoid directional control valve, triggering described the 3rd solenoid directional control valve connects described the first valve body oil inlet and described damping speed regulating structure and turns round oil circuit between the oil inlet of pilot control structure,
The valve body of described counterweight control cock has:
The second valve body oil inlet communicates with the oil inlet of described the 6th solenoid directional control valve;
The second valve body return opening communicates with another oil outlet of described the 6th solenoid directional control valve and the return opening of described the 7th solenoid directional control valve;
The 4th valve body oil outlet and the 5th valve body oil outlet communicate with two oil outlets of described the 7th solenoid directional control valve respectively.
6. counterweight according to claim 5 articulates control setup, it is characterized in that, described counterweight control cock and described remote-control box control cock are integrated in a valve body, perhaps adopts split type valve piece or Sandwich plate valve mode to make up.
7. counterweight according to claim 6 articulates control setup, it is characterized in that, also comprises overflowing protective structure at valve inner.
8. one kind is used for the hydraulic control system that counterweight articulates control, comprise: rotation of rotary table system and weight balancing oil cylinder with revolution proportional control valve, it is characterized in that, comprise that also the arbitrary described counterweight of high-capacity pump, low-capacity pump and claim 1 ~ 7 articulates control setup, the first valve body oil inlet that described counterweight articulates control setup communicates with described low-capacity pump, described the first valve body oil outlet communicates with the oil inlet of described revolution proportional control valve, and described the second valve body oil outlet and the 3rd valve body oil outlet communicate with left and right guide's hydraulic fluid port of described revolution proportional control valve respectively.
9. the hydraulic control system that articulates control for counterweight according to claim 8, it is characterized in that, the second valve body oil inlet that described counterweight articulates control setup communicates with described high-capacity pump, and described the 4th valve body oil outlet and the 5th valve body oil outlet communicate with rod chamber and the rodless cavity of described weight balancing oil cylinder respectively.
10. a runabout crane, is characterized in that, comprises the described hydraulic control system that articulates control for counterweight of claim 8 or 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220673869 CN202967905U (en) | 2012-12-10 | 2012-12-10 | Counterweight mount control device, liquid control system and mobile crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220673869 CN202967905U (en) | 2012-12-10 | 2012-12-10 | Counterweight mount control device, liquid control system and mobile crane |
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| Publication Number | Publication Date |
|---|---|
| CN202967905U true CN202967905U (en) | 2013-06-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220673869 Withdrawn - After Issue CN202967905U (en) | 2012-12-10 | 2012-12-10 | Counterweight mount control device, liquid control system and mobile crane |
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| Country | Link |
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| CN (1) | CN202967905U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102992195A (en) * | 2012-12-10 | 2013-03-27 | 徐州重型机械有限公司 | Counterweight hanging control device, hydraulic control system and mobile crane |
| CN103644159A (en) * | 2013-12-30 | 2014-03-19 | 徐州重型机械有限公司 | Remote-control box control valve as well as rotary table hydraulic control system and crane |
| CN104828701A (en) * | 2014-11-25 | 2015-08-12 | 北汽福田汽车股份有限公司 | Hydraulic control system and crane therewith |
-
2012
- 2012-12-10 CN CN 201220673869 patent/CN202967905U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102992195A (en) * | 2012-12-10 | 2013-03-27 | 徐州重型机械有限公司 | Counterweight hanging control device, hydraulic control system and mobile crane |
| CN102992195B (en) * | 2012-12-10 | 2015-03-18 | 徐州重型机械有限公司 | Counterweight hanging control device, hydraulic control system and mobile crane |
| CN103644159A (en) * | 2013-12-30 | 2014-03-19 | 徐州重型机械有限公司 | Remote-control box control valve as well as rotary table hydraulic control system and crane |
| CN104828701A (en) * | 2014-11-25 | 2015-08-12 | 北汽福田汽车股份有限公司 | Hydraulic control system and crane therewith |
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| AV01 | Patent right actively abandoned |
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