CN102992212A - Impact-resistant hydraulic device, variable amplitude winch hydraulic system and crane - Google Patents
Impact-resistant hydraulic device, variable amplitude winch hydraulic system and crane Download PDFInfo
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- CN102992212A CN102992212A CN2012104906868A CN201210490686A CN102992212A CN 102992212 A CN102992212 A CN 102992212A CN 2012104906868 A CN2012104906868 A CN 2012104906868A CN 201210490686 A CN201210490686 A CN 201210490686A CN 102992212 A CN102992212 A CN 102992212A
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- operated directional
- pilot operated
- luffing
- directional control
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Abstract
The invention discloses an impact-resistant hydraulic device, a variable amplitude winch hydraulic system and a crane. The impact-resistant hydraulic device comprises a pilot operated directional control valve and a reducing valve, wherein the control end of the pilot operated directional control valve is connected to a variable amplitude control output end; an oil inlet of the pilot operated directional control valve is connected to a winch control output end; an oil return port of the pilot operated directional control valve is connected to an oil return path; a first working oil port of the pilot operated directional control valve is conducted towards the control end of a winch valve in a unidirectional mode; a second working oil port of the pilot operated directional control valve is connected to an oil inlet of the reducing valve; and an oil outlet of the reducing valve is conducted towards the control end of the winch valve in a unidirectional mode. The problem that high hydraulic impact is generated during variable amplitude and winch combined action severe be effectively solved, and the micro-control performance of the variable amplitude action is improved.
Description
Technical field
The present invention relates to crane amplitude variation elevator technical field, particularly a kind of protecting against shock hydraulic efficiency gear, luffing hoisting hydraulic system and hoisting crane.
Background technology
At present, the luffing hoisting hydraulic system of medium and small tonnage pilot-operated type car hosit generally adopts single oil pump feed, can realize the action of amplitude oil cylinder and/or hoist motor by the state of pilot handle adjustment main valve, particularly, oil pump by main valve to amplitude oil cylinder or hoist motor fuel feeding, main valve comprises elevator valve and luffing valve, the input end of pilot handle is connected to pilot control, and two mouths of pilot handle are the control end that luffing control output end and rolling control mouth are connected to respectively luffing valve and elevator valve.In the course of the work, by pilot handle valve being carried out the first operation, make luffing control output end output guide oil, it is the aperture area of capable of regulating luffing valve, realizing corresponding luffing action (as playing width of cloth action), and by pilot handle valve being carried out the second operation, make rolling control mouth output guide oil, be the aperture area of capable of regulating elevator valve, to realize corresponding elevator action (such as the off the hook action).
In the such scheme, when carrying out luffing elevator combination action, larger hydraulic efficiency impact will be produced; This is because when doing the combination action, when flow is under the saturation conditions, owing to adopt single oil pump feed, and luffing valve and elevator valve have valve post-compensation function, luffing and elevator action meeting synchronously reduce according to ratio, and this ratio is the luffing valve and the ratio of the aperture area of elevator valve.Because the design value of luffing action flow and elevator action flow differs larger, be that luffing action flow is significantly smaller than elevator action flow, cause like this when the combination action, the flow that the luffing action is assigned with becomes very little, and then cause amplitude oil cylinder to become suddenly low speed from high-speed motion, thereby cause larger hydraulic efficiency impact because the velocity variations gradient is excessive.
Therefore, how improving for above-mentioned deficiency and defective, is the technical barrier that those skilled in the art need to be resolved hurrily.
Summary of the invention
In view of this, the present invention aims to provide a kind of protecting against shock hydraulic efficiency gear, luffing hoisting hydraulic system and hoisting crane, changes the excessive problem that produces larger hydraulic efficiency impact because of the luffing action to solve existing luffing hoisting hydraulic system when making up action.
First aspect, the invention provides a kind of protecting against shock hydraulic efficiency gear, described protecting against shock hydraulic efficiency gear is used for the luffing hoisting hydraulic system, described luffing hoisting hydraulic system comprises pilot handle, elevator valve and luffing valve, described pilot handle has luffing control output end and rolling control mouth, and described luffing control output end is connected to the control end of described luffing valve; Described protecting against shock hydraulic efficiency gear comprises pilot operated directional control valve and reducing valve, described pilot operated directional control valve has at least two kinds of mode of operations, under the first mode of operation, the oil inlet of described pilot operated directional control valve communicates with the first actuator port, the return opening of described pilot operated directional control valve communicates with the second actuator port, under the second mode of operation, the oil inlet of described pilot operated directional control valve communicates with the second actuator port, the return opening of described pilot operated directional control valve communicates with the first actuator port, wherein, described the first mode of operation is initial condition; The control end of described pilot operated directional control valve is connected to described luffing control output end, the oil inlet of described pilot operated directional control valve is connected to described rolling control mouth, the return opening of described pilot operated directional control valve is connected to oil return circuit, the first actuator port of described pilot operated directional control valve is to the control end one-way conduction of described elevator valve, the second actuator port of described pilot operated directional control valve is connected to the oil inlet of described reducing valve, and the oil outlet of described reducing valve is to the control end one-way conduction of described elevator valve.
Further, described protecting against shock hydraulic efficiency gear also comprises shuttle valve; The first actuator port of described pilot operated directional control valve and the oil outlet of described reducing valve are connected to respectively two input ends of described shuttle valve, and the mouth of described shuttle valve is connected to the control end of described elevator valve.
Further, described pilot operated directional control valve is the 2/2-way valve, under the first mode of operation, the oil inlet of described pilot operated directional control valve communicates with the second actuator port, the return opening of described pilot operated directional control valve communicates with the first actuator port, under the second mode of operation, the oil inlet of described pilot operated directional control valve communicates with the first actuator port, and the return opening of described pilot operated directional control valve communicates with the second actuator port.
Further, be provided with dash pot valve on the oil circuit between the oil inlet of described the second actuator port and described reducing valve.
Further, each component part of described protecting against shock hydraulic efficiency gear is integrated in the same valve piece.
Second aspect, the present invention also provides a kind of luffing hoisting hydraulic system, and described luffing hoisting hydraulic system is provided with above-mentioned each described protecting against shock hydraulic efficiency gear.
The third aspect, the present invention also provides a kind of hoisting crane, and this hoisting crane is provided with above-mentioned luffing hoisting hydraulic system.
Protecting against shock hydraulic efficiency gear provided by the invention in use, when the luffing hoisting hydraulic system is done the luffing action but is not done elevator action (namely playing the off the hook action), the guide oil of the luffing control output end of pilot handle flow to the control end of luffing valve and pilot operated directional control valve, make oil pump pass through the luffing valve to the amplitude oil cylinder fuel feeding, and make pilot operated directional control valve be operated in the second mode of operation, on this basis, when being used as the elevator action, the guide oil stream of the rolling control mouth of pilot handle flow to the control end of elevator valve after with the oil inlet by pilot operated directional control valve and the second actuator port and reducing valve, because the pressure of this road guide oil reduces behind reducing valve, it is maximum that thereby the aperture area that makes the elevator valve does not reach, reduced like this pressure oil flow of the elevator valve of flowing through, make the responsiveness control of hoist motor within the specific limits, it is excessive that thereby the pressure oil flow that makes the luffing valve of flowing through is unlikely to the range of decrease, the luffing stable action is carried out, so just avoid producing excessive hydraulic efficiency impact, improve the micro-control performance of luffing action; And when the luffing hoisting hydraulic system is done the elevator action but do not done the luffing action, the luffing output control terminal of pilot handle is not exported guide oil, pilot operated directional control valve is in initial condition (being the first mode of operation), the guide oil of the rolling control mouth of pilot handle flow to the control end of elevator valve after with the oil inlet by pilot operated directional control valve, the first actuator port, thereby realizes normal elevator action.
Luffing hoisting hydraulic system provided by the invention comprises above-mentioned protecting against shock hydraulic efficiency gear, because above-mentioned protecting against shock hydraulic efficiency gear has above-mentioned technique effect, therefore, this luffing hoisting hydraulic system also has corresponding technique effect.
Hoisting crane provided by the invention is provided with above-mentioned luffing hoisting hydraulic system, because above-mentioned luffing hoisting hydraulic system has above-mentioned technique effect, therefore, this hoisting crane also has corresponding technique effect.
Description of drawings
The accompanying drawing that consists of a part of the present invention is used to provide a further understanding of the present invention, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:
The structural representation of a kind of protecting against shock hydraulic efficiency gear for the luffing hoisting hydraulic system that Fig. 1 provides for the embodiment of the invention;
The main element nomenclature:
1 pilot operated directional control valve
2 dashs pot valve
3 reducing valves
4 shuttle valves
The specific embodiment
Should be pointed out that in this part that to the description of concrete structure and description order only be explanation to specific embodiment, should not be considered as that protection scope of the present invention is had any restriction.In addition, in the situation of not conflicting, embodiment and the feature among the embodiment among the present invention can make up mutually.Below in conjunction with the drawings and specific embodiments the present invention is elaborated.
Please refer to Fig. 1, below with reference to the accompanying drawings the embodiment of the invention is elaborated.The protecting against shock hydraulic efficiency gear of this embodiment is used for the luffing hoisting hydraulic system, described luffing hoisting hydraulic system comprises pilot handle, elevator valve and luffing valve, described pilot handle has luffing control output end and rolling control mouth, described luffing control output end is connected to the control end of described luffing valve, the more detailed construction of relevant luffing hoisting hydraulic system and principle thereof can referring to relevant prior art, not given unnecessary details hereby.
As shown in Figure 1, the protecting against shock hydraulic efficiency gear of this embodiment comprises pilot operated directional control valve 1, dash pot valve 2, reducing valve 3 and shuttle valve 4.
Wherein, pilot operated directional control valve 1 preferred 2/2-way valve, under the first mode of operation (being right position shown in the figure), the oil inlet P of pilot operated directional control valve 1 communicates with the first actuator port A, oil return inlet T communicates with the second actuator port B, and under the second mode of operation, the oil inlet P of pilot operated directional control valve 1 communicates with the second actuator port B, oil return inlet T communicates with the first actuator port A, and the first mode of operation is initial condition.
The control end of pilot operated directional control valve 1 is connected to the luffing control output end of pilot handle; The oil inlet P of pilot operated directional control valve 1 is connected to the rolling control mouth of pilot handle, oil return inlet T is connected to oil return circuit, the first actuator port A is connected to an input end of shuttle valve 4, the second actuator port B is connected to the oil inlet of dash pot valve 2, the oil outlet of dash pot valve 2 is connected to the oil inlet of reducing valve 3, the oil outlet of reducing valve 3 is connected to another input end of shuttle valve 4, and the spring cavity hydraulic fluid port of reducing valve 3 is connected to oil return circuit, and the mouth of shuttle valve 4 is connected to the control end of elevator valve.
Below in conjunction with concrete scene the principle of work of above-mentioned protecting against shock hydraulic efficiency gear once is described:
In the course of the work, when the luffing hoisting hydraulic system is done luffing action (as playing width of cloth action) but is not done the elevator action, the guide oil of the luffing control output end of pilot handle flow to the control end of luffing valve and pilot operated directional control valve 1, the aperture area of control luffing valve and the state of control pilot operated directional control valve 1, make system's oil pump pass through the luffing valve to the amplitude oil cylinder fuel feeding, and make pilot operated directional control valve be operated in the second mode of operation, on this basis, when the luffing hoisting hydraulic system is done elevator action (such as the off the hook action), the guide oil stream of the rolling control mouth of pilot handle will be by oil inlet P and the second actuator port B and the dash pot valve 2 of pilot operated directional control valve 1, flow to the control end of elevator valve behind reducing valve 3 and the shuttle valve 4, and then the aperture area of control elevator valve, because the pressure of this road guide oil reduces behind reducing valve 3, thereby make the aperture area of elevator valve not reach predetermined value, reduced the pressure oil flow of the elevator valve of flowing through of system's oil pump output, make the responsiveness control of hoist motor within the specific limits, correspondingly, it is excessive that the pressure oil flow of luffing valve of flowing through is unlikely to the range of decrease, the luffing stable action is carried out, so just avoid when the combination action, producing excessive hydraulic efficiency impact, guaranteed the micro-control performance of luffing action.
And when the luffing hoisting hydraulic system is done the elevator action but do not done the luffing action, the luffing output control terminal of pilot handle is not exported guide oil, pilot operated directional control valve 1 is in initial condition (being the first mode of operation), the guide oil of the rolling control mouth of pilot handle will be by the oil inlet P of pilot operated directional control valve 1, flow to the control end of elevator valve behind the first actuator port A and the shuttle valve 4, owing to there is not the effect of reducing valve 3, the loss of pressure of this road guide oil is less, the aperture area that can control the elevator valve reaches predetermined value, thereby realize normal elevator action, if on this basis, when the luffing hoisting hydraulic system was also done the luffing action, this situation can be referring to the description of the last period.
In specific implementation process, the damping value of the parameter of reducing valve 3 and dash pot valve 2 can be selected as required.
In above-described embodiment, for the complexity that reduces piping layout and easy to use, the needs of installing, each valve member of protecting against shock hydraulic efficiency gear can be integrated in the same valve piece, as shown in Figure 1, this valve piece forms the Pi1 mouth, the Pin mouth, Pout mouth and D mouth, wherein, the control end of pilot operated directional control valve 1 is connected to the Pi1 mouth, the oil inlet P of pilot operated directional control valve 1 communicates with the Pin mouth, the spring cavity hydraulic fluid port of oil return inlet T and reducing valve 3 communicates with the D mouth, the mouth of shuttle valve 4 communicates with the Pout mouth, so in use, Pi1 mouth and Pin mouth can be connected to respectively luffing control output end and the rolling control mouth of pilot handle, the D mouth be connected to oil return circuit (leading to fuel tank), and the Pout mouth be connected to the control end of elevator valve.
In above-described embodiment, it is more steady that the setting of dash pot valve 2 can make combination action or single movement switch to combination action switching, further reduce hydraulic efficiency impact power, but in other embodiments, if reduce in the preset range by selecting suitable reducing valve 3 that combination is impacted, also can omit dash pot valve 2.
Among the above-mentioned various embodiment, adopt the control end of shuttle valve 4 connection two external oil circuits of pilot operated valve device and elevator valve, but in other embodiments, as long as can realize under two kinds of situations, the control end one-way conduction of these two external oil collecting road direction elevator valves gets final product.
Among the above-mentioned various embodiment, pilot operated directional control valve 1 is the 2/2-way valve, but in other embodiments, for the ease of other control, pilot operated directional control valve 1 also can be other forms, namely has other outer mode of operations of above-mentioned two kinds of mode of operations.
The embodiment of the invention also provides a kind of luffing hoisting hydraulic system, this luffing hoisting hydraulic system comprises pilot handle, elevator valve and luffing valve, described pilot handle has luffing control output end and rolling control mouth, described luffing control output end is connected to the control end of described elevator valve, also comprise above-mentioned protecting against shock hydraulic efficiency gear, because above-mentioned protecting against shock hydraulic efficiency gear has above-mentioned technique effect, therefore, this luffing hoisting hydraulic system also has corresponding technique effect.
The embodiment of the invention also provides a kind of hoisting crane, and such as car hosit, this hoisting crane is provided with above-mentioned luffing hoisting hydraulic system, because above-mentioned luffing hoisting hydraulic system has above-mentioned technique effect, therefore, this hoisting crane also has corresponding technique effect.
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. protecting against shock hydraulic efficiency gear, be used for the luffing hoisting hydraulic system, described luffing hoisting hydraulic system comprises pilot handle, elevator valve and luffing valve, described pilot handle has luffing control output end and rolling control mouth, described luffing control output end is connected to the control end of described luffing valve, it is characterized in that:
Described protecting against shock hydraulic efficiency gear comprises pilot operated directional control valve (1) and reducing valve (3), described pilot operated directional control valve (1) has at least two kinds of mode of operations, under the first mode of operation, the oil inlet (P) of described pilot operated directional control valve (1) communicates with the first actuator port (A), the return opening (T) of described pilot operated directional control valve (1) communicates with the second actuator port (B), under the second mode of operation, the oil inlet (P) of described pilot operated directional control valve (1) communicates with the second actuator port (B), the return opening (T) of described pilot operated directional control valve (1) communicates with the first actuator port (A), wherein, described the first mode of operation is initial condition;
The control end of described pilot operated directional control valve (1) is connected to described luffing control output end, the oil inlet (P) of described pilot operated directional control valve (1) is connected to described rolling control mouth, the return opening (T) of described pilot operated directional control valve (1) is connected to oil return circuit, first actuator port (A) of described pilot operated directional control valve (1) is to the control end one-way conduction of described elevator valve, second actuator port (B) of described pilot operated directional control valve (1) is connected to the oil inlet of described reducing valve (3), and the oil outlet of described reducing valve (3) is to the control end one-way conduction of described elevator valve.
2. protecting against shock hydraulic efficiency gear as claimed in claim 1, it is characterized in that: described protecting against shock hydraulic efficiency gear also comprises shuttle valve (4); First actuator port (A) of described pilot operated directional control valve (1) and the oil outlet of described reducing valve (3) are connected to respectively two input ends of described shuttle valve (4), and the mouth of described shuttle valve (4) is connected to the control end of described elevator valve.
3. protecting against shock hydraulic efficiency gear as claimed in claim 1, it is characterized in that: described pilot operated directional control valve (1) is the 2/2-way valve.
4. such as each described protecting against shock hydraulic efficiency gear of claims 1 to 3, it is characterized in that: be provided with dash pot valve (2) on the oil circuit between the oil inlet of described the second actuator port (B) and described reducing valve (3).
5. such as each described protecting against shock hydraulic efficiency gear of claims 1 to 3, it is characterized in that: each component part of described protecting against shock hydraulic efficiency gear is integrated in the same valve piece.
6. luffing hoisting hydraulic system, it is characterized in that: described luffing hoisting hydraulic system also is provided with each described protecting against shock hydraulic efficiency gear of claim 1 to 5.
7. hoisting crane, it is characterized in that: described hoisting crane is provided with luffing hoisting hydraulic system claimed in claim 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210490686.8A CN102992212B (en) | 2012-11-27 | 2012-11-27 | Impact-resistant hydraulic device, variable amplitude winch hydraulic system and crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210490686.8A CN102992212B (en) | 2012-11-27 | 2012-11-27 | Impact-resistant hydraulic device, variable amplitude winch hydraulic system and crane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102992212A true CN102992212A (en) | 2013-03-27 |
| CN102992212B CN102992212B (en) | 2015-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210490686.8A Active CN102992212B (en) | 2012-11-27 | 2012-11-27 | Impact-resistant hydraulic device, variable amplitude winch hydraulic system and crane |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10110704A (en) * | 1996-10-02 | 1998-04-28 | Hitachi Constr Mach Co Ltd | Oil pressure control device |
| JPH10110703A (en) * | 1996-10-02 | 1998-04-28 | Hitachi Constr Mach Co Ltd | Oil pressure control device |
| CN102493967A (en) * | 2011-11-21 | 2012-06-13 | 三一汽车起重机械有限公司 | Crane, rotation control system thereof and rotation buffering valve of crane |
| CN202381430U (en) * | 2011-12-20 | 2012-08-15 | 徐州重型机械有限公司 | Load-sensitive hydraulic system and crane with same |
| CN202414996U (en) * | 2012-01-18 | 2012-09-05 | 常德中联重科液压有限公司 | Hydraulic control loop and crane |
-
2012
- 2012-11-27 CN CN201210490686.8A patent/CN102992212B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10110704A (en) * | 1996-10-02 | 1998-04-28 | Hitachi Constr Mach Co Ltd | Oil pressure control device |
| JPH10110703A (en) * | 1996-10-02 | 1998-04-28 | Hitachi Constr Mach Co Ltd | Oil pressure control device |
| CN102493967A (en) * | 2011-11-21 | 2012-06-13 | 三一汽车起重机械有限公司 | Crane, rotation control system thereof and rotation buffering valve of crane |
| CN202381430U (en) * | 2011-12-20 | 2012-08-15 | 徐州重型机械有限公司 | Load-sensitive hydraulic system and crane with same |
| CN202414996U (en) * | 2012-01-18 | 2012-09-05 | 常德中联重科液压有限公司 | Hydraulic control loop and crane |
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| CN102992212B (en) | 2015-01-14 |
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