CN106065883A - Stop valve, crane arm telescopic hydraulic system and crane - Google Patents
Stop valve, crane arm telescopic hydraulic system and crane Download PDFInfo
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- CN106065883A CN106065883A CN201610688513.5A CN201610688513A CN106065883A CN 106065883 A CN106065883 A CN 106065883A CN 201610688513 A CN201610688513 A CN 201610688513A CN 106065883 A CN106065883 A CN 106065883A
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- Prior art keywords
- valve
- control valve
- control
- oil
- telescopic
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
- B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
- B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
- B66C23/705—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic telescoped by hydraulic jacks
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a kind of stop valve, crane arm telescopic hydraulic system and crane, including valve body also include the first control valve being integrated in described valve body, the second control valve, for the first oil circuit connected with telescopic oil cylinder rod chamber, for the second oil circuit connected with telescopic oil cylinder rodless cavity, second control valve described in when described first control valve is opened is opened, and the second control valve described in when described first control valve is closed is closed；Wherein: the first oil communication described in when described first control valve is opened, the first oil circuit described in during described first control valve Guan Bi disconnects；Second oil communication described in when described second control valve is opened, the second oil circuit described in during described second control valve Guan Bi disconnects；Telescopic oil cylinder rod chamber, the pressure of rodless cavity is cut off by two control valves, the pressure preventing telescopic oil cylinder rod chamber acts on rodless cavity, reduces back pressure value, makes two control valves be difficult to be opened by pressure oil, thus ensure that telescopic oil cylinder will not protract, eliminate safe hidden trouble.
Description
Technical field
The present invention relates to technical field of hydraulic pressure, particularly to a kind of stop valve, crane arm telescopic hydraulic system and crane.
Background technology
At present, the telescopic system of hoister in large tonnage, use horizontal bar latch telescopic systems more, this system mainly by main valve,
Balanced valve, control device and telescopic oil cylinder composition, cut off telescopic oil cylinder rod chamber pressure by controlling device, and balanced valve is to flexible
The rodless cavity of oil cylinder carries out pressurize, it is ensured that telescopic oil cylinder will not protract under the effect of back pressure again.
Above-mentioned horizontal bar latch telescopic system has a disadvantage in that
System back pressure compared with big, oil cylinder angle is relatively low and telescopic oil cylinder Area comparison is big time, control device stability and can
Poor by property hinge, the pressure that system back pressure acts on rod chamber is relatively big, does not ensures that by controlling device cut-out rod chamber pressure
Telescopic oil cylinder does not protracts, and the pressure of telescopic oil cylinder rodless cavity acts on rod chamber, so that pressure oil is easy to push control open
Device so that telescopic oil cylinder protracts, and there is potential safety hazard.
Summary of the invention
It is an object of the invention to provide a kind of stop valve, crane arm telescopic hydraulic system and crane, existing to solve
The technical problem of telescopic oil cylinder extension present in technology.
The stop valve that the present invention provides, including valve body, also includes the first control valve, the second control being integrated in described valve body
Valve processed, for the first oil circuit connect with telescopic oil cylinder rod chamber, be used for the second oil circuit of connecting with telescopic oil cylinder rodless cavity, when
Second control valve described in when described first control valve is opened is opened, and the second control valve described in when described first control valve is closed is closed
Close；Wherein:
First oil communication described in when described first control valve is opened, the first oil circuit described in during described first control valve Guan Bi
Disconnect；
Second oil communication described in when described second control valve is opened, the second oil circuit described in during described second control valve Guan Bi
Disconnect.
Further, described first control valve is inserted valve, also includes reversal valve, high-pressure oil passage and low pressure oil way, described
Reversal valve connects control mouth and the high-pressure oil passage of described first control valve when being in the first station, when described reversal valve is in second
Control mouth and the low pressure oil way of described first control valve is connected during station.
Further, described second control valve is inserted valve；Or,
Described second control valve is electromagnetic valve；Or,
Described second control valve is pilot operated valve device.
Further, when described second control valve is inserted valve, when described reversal valve is in the first station, connection is described
The control mouth of the second control valve and high-pressure oil passage, connect the control of described second control valve when described reversal valve is in the second station
Donsole and low pressure oil way.
Further, when described second control valve is electromagnetic valve or pilot operated valve device, described second control valve is two two
Logical valve, when described second control valve is in the first station, connects control mouth and second oil circuit of described second control valve, when described
Reversal valve connects control mouth and the low pressure oil way of described second control valve when being in the second station.
Further, described first control valve is electromagnetic valve or pilot operated valve device.
Further, described second control valve is electromagnetic valve；Or,
Described second control valve is pilot operated valve device；Or,
Described second control valve is inserted valve, also includes that reversal valve, high-pressure oil passage and low pressure oil way, described reversal valve are in
Connect control mouth and the high-pressure oil passage of described second control valve during the first station, connect when described reversal valve is in the second station
The control mouth of described second control valve and low pressure oil way.
Further, it is provided with relief valve between described first control valve and the first oil circuit.
Present invention also offers a kind of crane arm telescopic hydraulic system, including main valve, telescopic oil cylinder, drainage device and outside
Oil sources, also includes above-mentioned stop valve；Described main valve is connected with the rodless cavity of described telescopic oil cylinder by described second oil circuit, and institute
State main valve to be connected with the rod chamber of described telescopic oil cylinder by described first oil circuit, form oil supply loop.
Further, described main valve is three-position four-way valve.
Further, the balanced valve being arranged between the second oil circuit and telescopic oil cylinder is also included.
The pipeline safety of hydraulic system is ensured by balanced valve.
Present invention also offers a kind of crane, described crane includes above-mentioned stop valve or includes that above-mentioned crane arm is stretched
Contracting hydraulic system.
A kind of stop valve, crane arm telescopic hydraulic system and the crane that the present invention provides, has the advantage that the first control
Valve processed and the second control valve are turned on and off simultaneously, when the first control valve is closed, cut off telescopic oil cylinder rod chamber pressure, when the
When two control valves are closed, cutting off telescopic oil cylinder rodless cavity pressure, the first control valve and the second control valve match, and prevent flexible oil
The pressure of cylinder rod chamber acts on rodless cavity, reduces back pressure value, makes the first control valve and the second control valve be difficult to be beaten by pressure oil
Open, thus ensure that telescopic oil cylinder will not protract, eliminate safe hidden trouble.
Accompanying drawing explanation
In order to be illustrated more clearly that the specific embodiment of the invention or technical scheme of the prior art, below will be to specifically
In embodiment or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not paying creative work
Put, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
The structural representation of the stop valve that Fig. 1 provides for the embodiment of the present invention one；
The structural representation of the stop valve that Fig. 2 provides for the embodiment of the present invention two；
The structural representation of the stop valve that Fig. 3 provides for the embodiment of the present invention three；
The structural representation of the crane arm telescopic hydraulic system that Fig. 4 provides for the embodiment of the present invention four；
The structural representation of the crane arm telescopic hydraulic system that Fig. 5 provides for the embodiment of the present invention five；
The structural representation of the crane arm telescopic hydraulic system that Fig. 6 provides for the embodiment of the present invention six；
Reference:
7-valve body；711-the first control valve；712-the second control valve；
72-reversal valve；73-the first oil circuit；74-the second oil circuit；
75-high-pressure oil passage；76-low pressure oil way；77-damps；
78-relief valve；8-main valve；9-telescopic oil cylinder；
10-drainage device；The outside oil sources of 11-；12-balanced valve；
Detailed description of the invention
Below in conjunction with accompanying drawing, technical scheme is clearly and completely described, it is clear that described enforcement
Example is a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill
The every other embodiment that personnel are obtained under not making creative work premise, broadly falls into the scope of protection of the invention.
Embodiment one:
The structural representation of the stop valve that Fig. 1 provides for the embodiment of the present invention one, as it is shown in figure 1, the present embodiment one provides
Stop valve, including valve body 7, first control valve the 711, second control valve 712 of also including being integrated in described valve body 7, for
The first oil circuit 73 of connecting with telescopic oil cylinder rod chamber, for the second oil circuit 74 connected with telescopic oil cylinder rodless cavity, when described
Described in when first control valve 711 is opened, the second control valve 712 is opened, the second control described in when described first control valve 711 is closed
Valve 712 processed cuts out；Wherein:
First oil circuit 73 described in when described first control valve 711 is opened connects, described in when described first control valve 711 closes
First oil circuit 73 disconnects；
Second oil circuit 74 described in when described second control valve 712 is opened connects, described in when described second control valve 712 closes
Second oil circuit 74 disconnects.
Specifically, described first control valve 711 is inserted valve, also includes reversal valve 72, high-pressure oil passage 75 and low pressure oil way
76, described reversal valve 72 connects control mouth and the high-pressure oil passage 75 of described first control valve 711 when being in the first station, when described
Reversal valve 72 connects control mouth and the low pressure oil way 76 of described first control valve 711 when being in the second station.
Specifically, described second control valve 712 is inserted valve, and described reversal valve 72 connects described when being in the first station
The control mouth of two control valves 712 and high-pressure oil passage 75, connect described second and control when described reversal valve 72 is in the second station
The control mouth of valve 712 and low pressure oil way 76.
The present embodiment connects in the first control valve 711 and the second control valve 712 and is provided with damping 77 on the oil circuit of reversal valve 72,
Damping 77 can improve the first control valve 711 and the stationarity of the second control valve 712 state switching.
The present embodiment also includes the relief valve 78 being arranged between the first control valve 711 and the first oil circuit 73, arranges safety
Valve 78 is prevented from the first control valve 711 and damages because oil pressure is excessive.
The using method of the present embodiment is:
When described reversal valve 72 is in the second station, connect control mouth and the low pressure oil way of described first control valve 711
76, control mouth and the low pressure oil way 76 of described second control valve 712 are connected, so that first control valve the 711, second control valve
712 are in opening；
When described reversal valve 72 is in the first station, connect control mouth and the high-pressure oil passage of described first control valve 711
75, control mouth and the high-pressure oil passage 75 of described second control valve 712 are connected, so that first control valve the 711, second control valve
712 are in closure state；
The present embodiment provide stop valve, this embodiment have the technical effect that the first control valve 711 and the second control valve
712 are turned on and off simultaneously, when the first control valve 711 is closed, cut off telescopic oil cylinder rod chamber pressure, when the second control valve
During 712 closedown, cutting off telescopic oil cylinder rodless cavity pressure, the first control valve 711 and the second control valve 712 match, and prevent from stretching
The pressure of cylinder rod chamber acts on rodless cavity, reduces back pressure value, make the first control valve 711 and the second control valve 712 be difficult to by
Pressure oil is opened, thus ensures that telescopic oil cylinder will not protract, and eliminates safe hidden trouble.
Embodiment two:
The structural representation of the stop valve that Fig. 2 provides for the embodiment of the present invention two, as in figure 2 it is shown, the present embodiment two provides
Stop valve, be the further improvement to the stop valve that embodiment one provides, on the architecture basics of embodiment one, control second
Valve 712 processed replaces with electromagnetic valve from inserted valve, and described second control valve 712 is two two-port valves, at described second control valve 712
When the first station, connect control mouth and second oil circuit 74 of described second control valve 712, when described reversal valve 72 is in second
Control mouth and the low pressure oil way 76 of described second control valve 712 is connected during station.
The using method of the present embodiment is:
When described reversal valve 72 is in the second station, connect control mouth and the low pressure oil way of described first control valve 711
76, when described second control valve 712 is in the first station, control mouth and second oil circuit of described second control valve 712 is connected
74, so that first control valve the 711, second control valve 712 is in opening；
When described reversal valve 72 is in the first station, connect control mouth and the high-pressure oil passage of described first control valve 711
75, when described second control valve 712 is in the second station, control mouth and the low pressure oil way of described second control valve 712 is connected
76, so that first control valve the 711, second control valve 712 is in closure state.
Embodiment three:
The structural representation of the stop valve that Fig. 3 provides for the embodiment of the present invention three, as it is shown on figure 3, the present embodiment three provides
Stop valve, be the further improvement to the stop valve that embodiment one provides, on the architecture basics of embodiment one, control second
Valve 712 processed replaces with pilot operated valve device from inserted valve, and described second control valve 712 is two two-port valves, at described second control valve 712
When the first station, connect control mouth and second oil circuit 74 of described second control valve 712, when described reversal valve 72 is in second
Control mouth and the low pressure oil way 76 of described second control valve 712 is connected during station.
The using method of the stop valve of the present embodiment is identical with embodiment two, does not repeats at this.
In above three embodiment, the first control valve 711, except using inserted valve, also can use electrically-controlled valve, pilot operated valve device etc.
Replace, do not repeat at this.
Embodiment four:
The structural representation of the crane arm telescopic hydraulic system that Fig. 4 provides for the present invention, as shown in Figure 4, the present embodiment carries
The crane arm telescopic hydraulic system of confession, including main valve 8, telescopic oil cylinder 9, also includes the stop valve in embodiment one, embodiment one
In, the first control valve 711 is inserted valve, and the second control valve 712 is inserted valve；
The oil inlet P of main valve 8 is connected to pressure oil-source, and such as the oil-out of oil pump, the oil return inlet T of main valve 8 is connected to fuel tank, main valve
First actuator port of 8 connects the first oil circuit 73, and the second actuator port of main valve 8 connects the second oil circuit 74；
Main valve 8 is connected with the rodless cavity of described telescopic oil cylinder 9 by described second oil circuit 74, and main valve 8 is by described first
Oil circuit 73 connects with the rod chamber of telescopic oil cylinder 9, forms oil supply loop.
Owing to the first control valve 711 and the second control valve 712 are inserted valve, need high-pressure oil passage 75 and outside oil sources
11 connections, low pressure oil way 76 connects with drainage device 10.
The using method of the crane arm telescopic hydraulic system of the present embodiment is:
If desired telescopic oil cylinder 9 stretching motion, reversing valve operated 72, make reversal valve 72 be in the second station, now, first
The control mouth of control valve 711 connects with low pressure oil way 76, and the control mouth of the second control valve 712 connects with low pressure oil way 76, low pressure
Oil circuit 76 connects with drainage device 10, and then makes the first control valve 711 and the second control valve 712 open, the first oil circuit 73 and
Two oil circuits 74 are in connected state, so, are used to the rodless cavity fuel feeding of telescopic oil cylinder 9, the first oil circuit 73 by the second oil circuit 74
In the rod chamber oil return of telescopic oil cylinder 9, the stretching motion of telescopic oil cylinder 9 can be realized.
If telescopic oil cylinder quits work, operated reversal valve 72, and made reversal valve 72 be in the first station, now, the first control
The control mouth of valve 711 processed connects with high-pressure oil passage 75, and the control mouth of the second control valve 712 connects with high-pressure oil passage 75, hydraulic oil
Road 75 connects with outside oil sources 11, under the oil pressure of outside oil sources, makes the first control valve 711 and the second control valve 712 close, the
One oil circuit 73 and the second oil circuit 74 are in dissengaged positions, thus cut off the entering of telescopic oil cylinder 9, oil return, make telescopic oil cylinder 9 stop work
Make.
The crane arm telescopic hydraulic system that the present embodiment provides, also include being arranged at the second oil circuit 74 and telescopic oil cylinder 9 it
Between balanced valve 12.
Specifically, the oil-in of balanced valve 12 is connected to the second oil circuit 74, and the oil-out of balanced valve 12 is connected to flexible oil
The rodless cavity of cylinder 9, the hydraulic control hydraulic fluid port of balanced valve 12 is connected to the second actuator port of main valve 8, is arranged such, prevents telescopic oil cylinder
9 the most passively retract, and improve telescopic oil cylinder 9 stationarity in the course of the work.
The crane arm telescopic hydraulic system that the present embodiment provides, having the technical effect that of this embodiment uses cutting of the present invention
The hydraulic system of disconnected valve, cuts off the pressure of telescopic oil cylinder 9 rod chamber by the first control valve 711, and the second control valve 712 is cut off and stretched
The pressure of contracting oil cylinder 9 rodless cavity, prevents the pressure of telescopic oil cylinder 9 rod chamber from acting on rodless cavity, reduces back pressure value, make the first control
Valve 711 processed and the second control valve 712 are difficult to be opened by pressure oil, thus ensure that telescopic oil cylinder will not protract, and improve crane arm and stretch
The safety in utilization of contracting hydraulic system, stability, and eliminate the potential safety hazard that telescopic oil cylinder extension causes.
Embodiment five:
The structural representation of the crane arm telescopic hydraulic system that Fig. 5 provides for the embodiment of the present invention six, as it is shown in figure 5, this
The crane arm telescopic hydraulic system that embodiment provides, including main valve 8, telescopic oil cylinder 9, also includes the stop valve in embodiment two,
In embodiment two, the first control valve 711 is inserted valve, and the second control valve 712 is electromagnetic valve；
The oil inlet P of main valve 8 is connected to pressure oil-source, and such as the oil-out of oil pump, the oil return inlet T of main valve 8 is connected to fuel tank, main valve
First actuator port of 8 connects the second oil circuit 74, and the second actuator port of main valve 8 connects the first oil circuit 73；
First actuator port of main valve 8 is connected with the rodless cavity of described telescopic oil cylinder 9 by described second oil circuit 74, main valve
Second actuator port of 8 is connected with the rod chamber of described telescopic oil cylinder 9 by described first oil circuit 73, forms oil supply loop.
Using method and the technique effect of the crane arm telescopic hydraulic system of the present embodiment are identical with embodiment five, at this just
Do not repeat.
Embodiment six:
The structural representation of the crane arm telescopic hydraulic system that Fig. 6 provides for the embodiment of the present invention six, as shown in Figure 6, this
The crane arm telescopic hydraulic system that embodiment provides, including main valve 8, telescopic oil cylinder 9, also includes the stop valve in embodiment three,
In embodiment three, the first control valve 711 is inserted valve, and the second control valve 712 is pilot operated valve device；
The oil inlet P of main valve 8 is connected to pressure oil-source, and such as the oil-out of oil pump, the oil return inlet T of main valve 8 is connected to fuel tank, main valve
First actuator port of 8 connects the second oil circuit 74, and the second actuator port of main valve 8 connects the first oil circuit 73；
First actuator port of main valve 8 is connected with the rodless cavity of described telescopic oil cylinder 9 by described second oil circuit 74, main valve
Second actuator port of 8 is connected with the rod chamber of described telescopic oil cylinder 9 by described first oil circuit 73, forms oil supply loop.
Using method and the technique effect of the crane arm telescopic hydraulic system of the present embodiment are identical with embodiment five, at this just
Do not repeat.
Embodiment seven:
Present invention also offers a kind of crane, this crane arranges above-mentioned stop valve or above-mentioned lifting telescopic hydraulic system
System, owing to above-mentioned stop valve or lifting telescopic hydraulic system are it can be avoided that because back pressure value is higher, telescopic oil cylinder protracts, therefore, should
Crane has more preferable security performance, and the specific implementation process of its appropriate section is similar to the aforementioned embodiment, does not goes to live in the household of one's in-laws on getting married at this
State, the detailed description of the invention of other parts, can be found in related description of the prior art, do not repeat at this.
Last it is noted that various embodiments above is only in order to illustrate technical scheme, it is not intended to limit；To the greatest extent
The present invention has been described in detail by pipe with reference to foregoing embodiments, it will be understood by those within the art that: it depends on
So the technical scheme described in foregoing embodiments can be modified, or the most some or all of technical characteristic is entered
Row equivalent；And these amendments or replacement, do not make the essence of appropriate technical solution depart from various embodiments of the present invention technology
The scope of scheme.
Claims (12)
1. a stop valve, including valve body (7), it is characterised in that also include the first control valve being integrated in described valve body (7)
(711), the second control valve (712), for connect with telescopic oil cylinder rod chamber the first oil circuit (73), be used for telescopic oil cylinder without
Second oil circuit (74) of bar chamber connection, the second control valve (712) unlatching described in when described first control valve (711) is opened, when
Described in when described first control valve (711) is closed, the second control valve (712) is closed；Wherein:
First oil circuit (73) connection described in when described first control valve (711) is opened, described first control valve (711) closes time institute
State the first oil circuit (73) to disconnect；
Second oil circuit (74) connection described in when described second control valve (712) is opened, described second control valve (712) closes time institute
State the second oil circuit (74) to disconnect.
Stop valve the most according to claim 1, it is characterised in that described first control valve (711) is inserted valve, also includes
Reversal valve (72), high-pressure oil passage (75) and low pressure oil way (76), described reversal valve (72) connects described when being in the first station
The control mouth of one control valve (711) and high-pressure oil passage (75), connect described when described reversal valve (72) is in the second station
The control mouth of one control valve (711) and low pressure oil way (76).
Stop valve the most according to claim 2, it is characterised in that described second control valve (712) is inserted valve；Or,
Described second control valve (712) is electromagnetic valve；Or,
Described second control valve (712) is pilot operated valve device.
Stop valve the most according to claim 3, it is characterised in that when described second control valve (712) is inserted valve, institute
State control mouth and the high-pressure oil passage (75) connecting described second control valve (712) when reversal valve (72) is in the first station, work as institute
State control mouth and the low pressure oil way (76) connecting described second control valve (712) when reversal valve (72) is in the second station.
Stop valve the most according to claim 3, it is characterised in that when described second control valve (712) be electromagnetic valve or
During pilot operated valve device, described second control valve (712) is two two-port valves, when described second control valve (712) is in the first station, even
The control mouth of logical described second control valve (712) and the second oil circuit (74), when described reversal valve (72) is in the second station even
The control mouth of logical described second control valve (712) and low pressure oil way (76).
Stop valve the most according to claim 1, it is characterised in that described first control valve (711) is electromagnetic valve or liquid
Control valve.
Stop valve the most according to claim 6, it is characterised in that described second control valve (712) is electromagnetic valve；Or,
Described second control valve (712) is pilot operated valve device；Or,
Described second control valve (712) is inserted valve, also includes reversal valve (72), high-pressure oil passage (75) and low pressure oil way (76),
Described reversal valve (72) connects control mouth and the high-pressure oil passage (75) of described second control valve (712) when being in the first station, when
Described reversal valve (72) connects control mouth and the low pressure oil way (76) of described second control valve (712) when being in the second station.
8. according to the stop valve described in claim 5 or 7, it is characterised in that described first control valve (711) and the first oil circuit
(73) relief valve (78) it is provided with between.
9. a crane arm telescopic hydraulic system, it is characterised in that include main valve (8), telescopic oil cylinder (9), drainage device (10)
With outside oil sources (11), also include according to the stop valve according to any one of claim 1-8；
Described main valve (8) is connected with the rodless cavity of described telescopic oil cylinder (9) by described second oil circuit (74), and described main valve
(8) connected with the rod chamber of described telescopic oil cylinder (9) by described first oil circuit (73), form oil supply loop.
Crane arm telescopic hydraulic system the most according to claim 9, it is characterised in that described main valve (8) is 3-position 4-way
Valve.
11. crane arm telescopic hydraulic systems according to claim 9, it is characterised in that also include being arranged at the second oil circuit
(74) balanced valve (12) and between telescopic oil cylinder (9).
12. 1 kinds of cranes, it is characterised in that described crane includes according to the cut-out according to any one of claim 1-8
Valve or include according to the crane arm telescopic hydraulic system according to any one of claim 9-11.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610688513.5A CN106065883B (en) | 2016-08-19 | 2016-08-19 | Stop valve, crane arm telescopic hydraulic system and crane |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610688513.5A CN106065883B (en) | 2016-08-19 | 2016-08-19 | Stop valve, crane arm telescopic hydraulic system and crane |
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| CN106065883A true CN106065883A (en) | 2016-11-02 |
| CN106065883B CN106065883B (en) | 2017-12-08 |
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| CN201610688513.5A Active CN106065883B (en) | 2016-08-19 | 2016-08-19 | Stop valve, crane arm telescopic hydraulic system and crane |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112173994A (en) * | 2020-09-18 | 2021-01-05 | 中联重科股份有限公司 | Control valve unit, hydraulic control loop and engineering equipment with telescopic crane boom |
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| WO2013056442A1 (en) * | 2011-10-20 | 2013-04-25 | 中联重科股份有限公司 | Luffing rebound drawback control system of hydraulic crane and automobile crane |
| CN102756979A (en) * | 2012-07-25 | 2012-10-31 | 徐州重型机械有限公司 | Crane and hydraulic control system for telescopic mechanism of crane |
| CN102900718A (en) * | 2012-09-28 | 2013-01-30 | 徐工集团工程机械股份有限公司 | Changeover valve device for hydraulic system and hydraulic system for crawler crane |
| CN103420290A (en) * | 2013-07-25 | 2013-12-04 | 三一汽车起重机械有限公司 | Telescopic protection system and crane |
| CN104692266A (en) * | 2015-02-05 | 2015-06-10 | 三一汽车起重机械有限公司 | Hydraulic system for telescopic buffer of crane boom and crane |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112173994A (en) * | 2020-09-18 | 2021-01-05 | 中联重科股份有限公司 | Control valve unit, hydraulic control loop and engineering equipment with telescopic crane boom |
| CN112173994B (en) * | 2020-09-18 | 2021-11-05 | 中联重科股份有限公司 | Control valve unit, hydraulic control loop and engineering equipment with telescopic crane boom |
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| CN106065883B (en) | 2017-12-08 |
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