CN101761523A - locking valve - Google Patents
locking valve Download PDFInfo
- Publication number
- CN101761523A CN101761523A CN200910263617A CN200910263617A CN101761523A CN 101761523 A CN101761523 A CN 101761523A CN 200910263617 A CN200910263617 A CN 200910263617A CN 200910263617 A CN200910263617 A CN 200910263617A CN 101761523 A CN101761523 A CN 101761523A
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- oil
- compression zone
- traveller
- plunger
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- 230000006835 compression Effects 0.000 claims abstract description 66
- 238000007906 compression Methods 0.000 claims abstract description 66
- 239000000945 filler Substances 0.000 claims description 22
- 230000004043 responsiveness Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
- F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/14—Booms only for booms with cable suspension arrangements; Cable suspensions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/04—Construction of housing; Use of materials therefor of sliding valves
- F16K27/041—Construction of housing; Use of materials therefor of sliding valves cylindrical slide valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
- F16K3/314—Forms or constructions of slides; Attachment of the slide to the spindle
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Safety Valves (AREA)
- Multiple-Way Valves (AREA)
Abstract
The invention provides a locking valve for hydraulic devices such as excavator or the like. The locking valve comprises a valve box (11) and a sliding column (13), and is characterized by comprising a compression part (14a) having one side connected with the oil inlet (11a), the other side accommodating the upper end of the sliding column, and further the inner diameter larger than the diameter of the upper end of the sliding column; a plunge piston (15), with dimension corresponding to the diameter of the compression part (14a), and having the upper end exposed from the oil inlet and the lower end slidably disposed inside the compression portion in a state of being connected with the upper end of the sliding column; and a hub (15a) formed by extending from the lower end of the plunge piston, connected with the upper end of the sliding column, and having diameter less than the diameter of the plunge piston. The hub comprises an oil path (15aa) which leads the control oil residue at the lower portion of the plunge piston to the lower end of the hub during moving of the plunge piston, an oil path (13a) in communication with the oil path (15aa) of the hub is formed along the central axis of the sliding column, and the oil path (13a) of the sliding column is in communication with the oil outlet (11b).
Description
Technical field
The present invention relates to be applied to the lock-up valve (Holding valve) of the hydraulic pressure installation of excavator etc., relate in particular to when discharging lock-up valve, improve the responsiveness of the corresponding traveller of the control valve that is connected with this lock-up valve, and then can improve the lock-up valve of the responsiveness of hydraulic pressure installation integral body.
Background technique
In general, the excavator of one of hydraulic pressure installation comprises cantilever, rocking arm, and equipments such as scraper bowl, these equipments have oil hydraulic cylinder respectively.These equipments are by to this oil hydraulic cylinder supply or cut off the pressure oil of being discharged by oil hydraulic pump and carry out operation.
Above-mentioned equipment is because the load of load of itself and excavation thing, the inside of oil hydraulic cylinder and connect control valve and the oil of the inside of the hydraulic tube of oil hydraulic cylinder flows out by the traveller and the gap between the clack box of control valve, thus cause in the phenomenon that nature descends also can take place immediately.
Thereby, for prevent this equipment in the phenomenon that immediately descends naturally, be suitable for lock-up valve.Above-mentioned lock-up valve is located on the hydraulic pipe line that connects oil hydraulic cylinder and control valve, and immediately, fundamentally cut-out pressure oil flows out to control valve from oil hydraulic cylinder in device is in.
Fig. 1 is the sectional schematic diagram of the lock-up valve of prior art.The structure and the working principle of the lock-up valve of prior art are described below with reference to Fig. 1.
The lock-up valve 1 of prior art is as shown in Figure 1, comprising: clack box 2, this clack box 2 possess filler opening and oil outlet 2a, 2b, first and second actuator port 2c, 2d, pass through the main compression zone 2f that oil circuit 2e connects above-mentioned mouthful; And traveller 3, be clipped in slidably in the main compression zone 2f of above-mentioned clack box 2.On the other hand, as known technology, above-mentioned traveller 3 is made of large-diameter portion 3a and minor diameter part 3b along its length, is adjacent to each other between the large-diameter portion 3a of above-mentioned traveller 3 and the above-mentioned main compression zone 2f, has gap (with reference to Fig. 1) each other between the minor diameter part 3b of above-mentioned traveller 3 and the above-mentioned main compression zone 2f.
And as shown in Figure 1, above-mentioned lock-up valve 1 also comprises: the 2g of upper portion pressurized portion is located at the top of above-mentioned main compression zone 2f and is communicated with filler opening 2a, and forms greater than main compression zone 2f; And bottom compression zone 2h, be located at the bottom of above-mentioned main compression zone 2f and be communicated with, and form greater than above-mentioned main compression zone 2f with above-mentioned oil outlet 2b.
Above-mentioned bottom compression zone 2h also comprises: top loop 4 is fixed on from the lower end of above-mentioned traveller 3 and has on the outer circumferential face of certain altitude; Bottom ring 5, the following end in contact of middle body and above-mentioned traveller 3; And helical spring 6, be clipped between above-mentioned top loop 4 and the above-mentioned bottom ring 5, make above-mentioned traveller 3 and above-mentioned top loop 4 turn back to original position.
Above-mentioned filler opening 2a will control the main compression zone 2f that oil is directed to above-mentioned lock-up valve 1 by the operation of operating stem (not shown), and above-mentioned oil outlet 2b is directed to fuel tank (not shown) with the oil residues of above-mentioned main compression zone 2f and above-mentioned bottom compression zone 2h.The above-mentioned first actuator port 2c is directed to the main compression zone 2f of above-mentioned lock-up valve 1 with pressure oil from oil hydraulic cylinder (not shown), and the above-mentioned second actuator port 2d is directed to the poppet valve that is connected (not shown) that is used to cut off oil hydraulic cylinder (not shown) and control valve (not shown) with working oil from the main compression zone 2f of above-mentioned lock-up valve 1.
According to this structure, the operating operation bar makes control oil flow into filler opening 2a, and the upper end portion that then promotes traveller 3 downwards makes above-mentioned traveller 3 move to lowering position.So, from the oil hydraulic cylinder of equipment (for example, cantilever cylinder, rocking arm cylinder etc.) working oil that flows into the above-mentioned first actuator port 2c blocked by above-mentioned traveller 3, oil residues between the main compression zone 2f of above-mentioned clack box 2 and the minor diameter part 3b of above-mentioned traveller 3 can be as shown in Figure 1, and the circuitous oil circuit 7 by sidepiece is discharged to oil outlet 2b.Thus, the pressure that acts on poppet valve 8 that utilizes the first actuator port 2c to apply is disengaged, and poppet valve 8 is removed the cut-out to the connecting passage that connects oil hydraulic cylinder and not shown pump, thereby oil hydraulic cylinder is driven according to the operation of operating stem.
If immediately, then the elastic force because of the helical spring 6 in the above-mentioned bottom compression zone 2h makes traveller 3 turn back to original position to operating stem from aforesaid state exchange is, thereby above-mentioned first actuator port 2c and the above-mentioned second actuator port 2d are communicated with.Exert pressure to poppet valve 8 from the working oil that oil hydraulic cylinder flows into by the first actuator port 2c.The poppet valve 8 that is pressed cuts off and connects the not shown oil hydraulic cylinder and the oil circuit of control valve, makes equipment keep locking (holding) state.
But the compression area that the lock-up valve 1 of prior art constitutes the control oil that applies to main compression zone 2f from filler opening 2a is identical with the area of the upper end portion of traveller 3.Therefore, when unlocking the lock state of valve 1, because delay appears in replying of above-mentioned traveller 3, and the responsiveness that postpones hydraulic pressure installation integral body exists to make the operator feel dull problem.
Summary of the invention
So the present invention makes in order to address the above problem, its purpose is to provide a kind of lock-up valve, with lock-up valve when lock state is transformed into releasing state, guarantee the responsiveness rapidly of traveller, thereby can improve the responsiveness of hydraulic pressure installation integral body.
For achieving the above object, the invention provides a kind of lock-up valve, this lock-up valve comprises: clack box, possess filler opening and oil outlet, first and second actuator port, connect above-mentioned mouthful main compression zone and be located at the bottom of above-mentioned main compression zone and the bottom compression zone that is communicated with main compression zone by oil circuit; And traveller, be clipped in the inside of above-mentioned clack box slidably, and be arranged on helical spring elastic support in the compression zone of above-mentioned bottom, this lock-up valve is characterised in that, comprise: compression zone, one side is connected with above-mentioned filler opening, and in the upper end that opposite side holds above-mentioned traveller, and its interior warp is greater than the diameter of the upper end of above-mentioned traveller; Plunger, size is corresponding with the diameter of above-mentioned compression zone, and is exposed at the inside that state that above-mentioned filler opening and lower end be connected with the upper end portion of above-mentioned traveller is located at above-mentioned compression zone slidably with the upper end; And wheel hub, prolong from the lower end of above-mentioned plunger and form and be connected with the top of above-mentioned traveller, and diameter is less than the diameter of above-mentioned plunger, wherein, above-mentioned wheel hub has oil circuit, this oil circuit will rest on the bottom of above-mentioned plunger when above-mentioned plunger moves control oil guides to the lower end of above-mentioned wheel hub, and above-mentioned traveller is formed with the oil circuit that is communicated with the oil circuit of above-mentioned wheel hub along the medial axis, and the oil circuit of above-mentioned traveller is communicated with above-mentioned oil outlet.
And the present invention also provides following specific embodiment to an embodiment of the invention described above.
According to one embodiment of the invention, be characterised in that above-mentioned lock-up valve also comprises guide pad, this guide pad combines with above-mentioned clack box with upper end and lower end opened state, above-mentioned compression zone is formed at the inside of above-mentioned guide pad, with the upper end and the lower end of the opening that connects above-mentioned guide pad.
According to one embodiment of the invention, be characterised in that the oil circuit of above-mentioned wheel hub forms groove (groove) shape that two end part and upper side are opened to the outside.
According to one embodiment of the invention, be characterised in that, the control oil that rests on above-mentioned plunger bottom is the oil that flows into by the gap between above-mentioned plunger and the above-mentioned compression zone after flowing into above-mentioned filler opening, and the above-mentioned plunger that utilization descends when applying new control oil by above-mentioned filler opening, the above-mentioned oil circuit of flowing through is directed into above-mentioned oil outlet.
The present invention has following effect.
The present invention makes the area of control compression zone with different with the area of its corresponding traveller; oil residues successfully can be discharged to the outside; thereby with lock-up valve when lock state is transformed into releasing state, can guarantee the responsiveness rapidly of traveller, thereby can improve the responsiveness of hydraulic pressure installation integral body.
Description of drawings
Fig. 1 is the sectional schematic diagram of the lock-up valve of prior art.
Fig. 2 is the sectional schematic diagram of lock-up valve of the present invention.
Fig. 3 is the schematic perspective view that is used for the plunger of lock-up valve of the present invention.
Fig. 4 is the sectional schematic diagram of the off working state of expression lock-up valve of the present invention.
Fig. 5 is the sectional schematic diagram of the working state of expression lock-up valve of the present invention.
Among the figure:
10: lock-up valve 11a: filler opening
11b: oil outlet 11c: first actuator port
11d: the second actuator port 11e, 13a, 15aa: oil circuit
11f: main compression zone 11g: bottom compression zone
11: clack box 12: helical spring
13: traveller 13b: large-diameter portion
13c: minor diameter part 14a: compression zone
14: guide pad 15a: wheel hub
15: plunger
Embodiment
Below with reference to Fig. 2 to Fig. 5 the embodiment of lock-up valve of the present invention is described.
Fig. 2 is the sectional schematic diagram of lock-up valve of the present invention, and Fig. 3 is the schematic perspective view that is used for the plunger of lock-up valve of the present invention.
Lock-up valve 10 of the present invention as shown in Figures 2 and 3, comprise: clack box 11 possesses: filler opening and oil outlet 11a, 11b, first and second actuator port 11c, 11d, connect above-mentioned mouthful main compression zone 11f and be located at the downside of above-mentioned main compression zone 11f and the bottom compression zone 11g that is communicated with main compression zone 11f by oil circuit 11e; And traveller 13, be clipped in slidably in the main compression zone 11f of above-mentioned clack box 11, and be arranged on interior helical spring 12 elastic support of above-mentioned bottom compression zone 11g.
At this, above-mentioned lock-up valve (10) also mainly comprises compression zone 14a, plunger 15 and wheel hub 15a.Above-mentioned compression zone 14a one side is connected with above-mentioned filler opening 11a, and in the upper end that opposite side then holds above-mentioned traveller 13, warp is greater than the diameter of the upper end of above-mentioned traveller 13 in it.Above-mentioned plunger 15 its sizes are corresponding with the diameter of above-mentioned compression zone 14a, and are exposed at the state that above-mentioned filler opening 11a and lower end be connected with the upper end portion of above-mentioned traveller 13 with the upper end and are located at above-mentioned compression zone 14a inside slidably.Above-mentioned wheel hub 15a prolongs and forms from the lower end of above-mentioned plunger 15, and is connected with the top of above-mentioned traveller 13, and its diameter is less than the diameter of above-mentioned plunger 15.
And above-mentioned wheel hub 15a has oil circuit 15aa, and this oil circuit 15aa will rest on the control oil of above-mentioned plunger bottom to the guiding of the lower end of above-mentioned wheel hub 15a when above-mentioned plunger 15 moves.Above-mentioned traveller 13 is formed with the oil circuit 13a that is communicated with the oil circuit 15aa of above-mentioned wheel hub 15a along the medial axis, the oil circuit 13a of above-mentioned traveller 13 is communicated with above-mentioned oil outlet 11b.
In addition, as known technology, above-mentioned traveller 13 is made of large-diameter portion 13b and minor diameter part 13c along its length, is adjacent to each other between the large-diameter portion 13b of above-mentioned traveller 13 and the above-mentioned main compression zone 11f, has the gap each other between the minor diameter part 13c of above-mentioned traveller 13 and the above-mentioned main compression zone 11f.And.The main compression zone 11f of above-mentioned clack box 11 and the minor diameter part 13 of above-mentioned traveller 13) between the gap be as known technology, the circuitous oil circuit 16 by sidepiece is communicated with (with reference to Fig. 2) with above-mentioned oil outlet 11b.
And lock-up valve of the present invention can further limit by following specific embodiment on the basis of above-mentioned basic structure.
Above-mentioned lock-up valve 10 can also comprise guide pad 14, and this guide pad 14 combines with above-mentioned clack box 11 with upper end and lower end opened state.At this moment, above-mentioned compression zone 14a is formed at the inside of above-mentioned guide pad 14, with the upper end and the lower end of the opening that connects above-mentioned guide pad 14.
Above-mentioned guide pad 14 can be integrally formed in above-mentioned clack box 11, also can be made of individual components removably.Fig. 2 to Fig. 5 of the present invention represents the situation that the individual components of the plug shape that above-mentioned guide pad 14 is opened to the outside by top and bottom constitutes.
The oil circuit 15aa of above-mentioned wheel hub 15a is preferably formed as the groove shape of opening to the outside into two end part and upper side, so that the oil circuit 13a of the oil residues in the above-mentioned guide pad 14 by above-mentioned traveller 13 is discharged to above-mentioned oil outlet 11b (with reference to Fig. 3) rapidly.
The control oil that rests on above-mentioned plunger 15 bottoms is to pass through the oil that the gap between above-mentioned plunger 15 and the above-mentioned compression zone 14a flows into after flowing into above-mentioned filler opening 11a.Rest on the control oil of the bottom of above-mentioned plunger 15, the above-mentioned plunger 15 that utilization descends when applying new control oil by above-mentioned filler opening 11a, the above-mentioned oil circuit 15aa that flows through, 13a is directed into above-mentioned oil outlet 11b.
Work to lock-up valve of the present invention with said structure is carried out following explanation with reference to Fig. 4 and Fig. 5.
At first, as shown in Figure 4, when traveller 13 is positioned at the lifting position of off working state, with oil hydraulic cylinder (not shown) (for example cantilever cylinder, rocking arm cylinder etc.) the first actuator port 11c that is communicated with and the second actuator port 11d that is communicated with control valve (not shown) of equipment, main compression zone 11f by above-mentioned lock-up valve 10 and the gap between the minor diameter part 13c keep the state that is interconnected.At this moment, above-mentioned traveller 13 utilizes the helical spring 12 in the bottom compression zone 11g that is located in the clack box 11 to keep lifting position.Thus, the oil that returns of above-mentioned oil hydraulic cylinder (for example cantilever cylinder, rocking arm cylinder etc.) passes through the rear that above-mentioned lock-up valve 10 flows into poppet valves (not shown).Its result cuts off the oil circuit between the corresponding traveller (not shown) of the side of corresponding oil hydraulic cylinder of above-mentioned poppet valve (not shown) and control valve, thereby can make by the equipment of this oil hydraulic cylinder control state of remaining neutral.
Operator's start-up operation bar under this state, then as shown in Figure 5, the control oil that flow into guide pad 14 by above-mentioned filler opening 11a makes traveller 13 move to lowering position by the plunger 15 in the above-mentioned guide pad 14.At this moment, the helical spring 12 in the bottom compression zone 11g in the above-mentioned clack box 11 is compressed.So the oil circuit from the above-mentioned first actuator port 11c to the second actuator port 11d is cut off by the traveller 13 of above-mentioned lock-up valve 10, and makes poppet valve (not shown) be in movably state.That is, can remove cut-out to the oil circuit that connects oil hydraulic cylinder and control valve (not shown).Usually this cut-out to oil circuit makes from the working oil of oil hydraulic cylinder discharge the front end of poppet valve is exerted pressure, thereby poppet valve is retreated, and oil hydraulic cylinder can drive according to the operation of operating stem.
At this moment, the oil circuit 15aa of the oil residues in the space between the compression zone 14a of the bottom of above-mentioned plunger 15 and above-mentioned guide pad 14 by the wheel hub 15a of above-mentioned plunger 15 is discharged to oil outlet 11b along the oil circuit 13a of above-mentioned traveller 13.And the oil residues between the main compression zone 11f of above-mentioned clack box 11 and the minor diameter part 13c of above-mentioned traveller 13 is as shown in Figure 5, and the circuitous oil circuit 16 by sidepiece is discharged to above-mentioned oil outlet 11b.
More than Shuo Ming the present invention can not limited by the foregoing description and accompanying drawing, and it is tangible carrying out simple replacement, distortion and change be in technological thought of the present invention for the people who possesses related domain general knowledge.
Claims (4)
1. lock-up valve, comprise: clack box (11) possesses filler opening and oil outlet (11a, 11b), first and second actuator port (11c, 11d), connects above-mentioned mouthful main compression zone (11f) and be located at the bottom of above-mentioned main compression zone (11f) and the bottom compression zone (11g) that is communicated with this main compression zone (11f) by oil circuit (11e); And traveller (13), be clipped in the inside of above-mentioned clack box (11) slidably, and be arranged on helical spring (12) elastic support in the above-mentioned bottom compression zone (11g), it is characterized in that,
Comprise: compression zone (14a), a side is connected with above-mentioned filler opening (11a), holds the upper end of above-mentioned traveller (13) at opposite side, and in it through diameter greater than the upper end of above-mentioned traveller (13);
Plunger (15), size is corresponding with the diameter of above-mentioned compression zone (14a), and is exposed at the inside that state that above-mentioned filler opening (11a) and lower end be connected with the upper end portion of above-mentioned traveller (13) is located at above-mentioned compression zone (14a) slidably with the upper end; And
Wheel hub (15a) prolongs from the lower end of above-mentioned plunger (15) and forms, and is connected with the top of above-mentioned traveller (13), and diameter is less than the diameter of above-mentioned plunger (15),
Above-mentioned wheel hub (15a) has oil circuit (15aa), and this oil circuit (15aa) will rest on the bottom of above-mentioned plunger when above-mentioned plunger (15) is mobile control oil guides to the lower end of above-mentioned wheel hub (15a),
Above-mentioned traveller (13) is formed with the oil circuit (13a) that is communicated with the oil circuit (15aa) of above-mentioned wheel hub (15a) along the medial axis, the oil circuit (13a) of above-mentioned traveller (13) is communicated with above-mentioned oil outlet (11b).
2. lock-up valve according to claim 1 is characterized in that,
Also comprise guide pad (14), this guide pad (14) combines with above-mentioned clack box (11) with upper end and lower end opened state,
Above-mentioned compression zone (14a) is formed at the inside of above-mentioned guide pad (14), with the upper end and the lower end of the opening that connects above-mentioned guide pad (14).
3. lock-up valve according to claim 1 is characterized in that,
The oil circuit (15aa) of above-mentioned wheel hub (15a) forms the groove shape that two end part and upper side are opened to the outside.
4. lock-up valve according to claim 1 is characterized in that,
The control oil that rests on the bottom of above-mentioned plunger (15) is to flow into the oil that above-mentioned filler opening (11a) flows into by the gap between above-mentioned plunger (15) and the above-mentioned compression zone (14a) afterwards,
And the above-mentioned plunger (15) that utilization descends when applying new control oil by above-mentioned filler opening (11a), (15aa 13a) is directed into above-mentioned oil outlet (11b) to the above-mentioned oil circuit of flowing through.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2008-0133402 | 2008-12-24 | ||
| KR20080133402A KR101488022B1 (en) | 2008-12-24 | 2008-12-24 | Holding valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101761523A true CN101761523A (en) | 2010-06-30 |
| CN101761523B CN101761523B (en) | 2013-08-28 |
Family
ID=42492872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102636171A Expired - Fee Related CN101761523B (en) | 2008-12-24 | 2009-12-23 | Locking valve |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR101488022B1 (en) |
| CN (1) | CN101761523B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102242740A (en) * | 2011-07-07 | 2011-11-16 | 北京机械设备研究所 | Hydraulic lock of sliding valve structure |
| CN102678965A (en) * | 2012-05-25 | 2012-09-19 | 中煤北京煤矿机械有限责任公司 | Adjustable high-pressure lossless pressure-reducing valve for coal mine |
| CN103299088A (en) * | 2010-12-28 | 2013-09-11 | 沃尔沃建造设备有限公司 | Holding valve for construction equipment |
| CN104295771A (en) * | 2014-10-16 | 2015-01-21 | 江苏恒立液压有限公司 | Pressure cut-off slice valve |
| CN104968947A (en) * | 2013-02-05 | 2015-10-07 | 沃尔沃建造设备有限公司 | Construction equipment pressure control valve |
| CN113323941A (en) * | 2021-07-29 | 2021-08-31 | 江苏恒立液压股份有限公司 | Buffer device of oil cylinder and oil cylinder |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102100949B1 (en) * | 2019-01-25 | 2020-04-16 | 디와이파워 주식회사 | Holding valve device provided with multi-stage pressure actuated spool valve structure |
| KR102734153B1 (en) * | 2022-12-01 | 2024-11-25 | 대경기업(주) | Anti-Drop Valve |
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| DE3683666D1 (en) * | 1985-04-11 | 1992-03-12 | Beringer Hydraulik Gmbh | LEAK-FREE BRAKE LOCK VALVE. |
| JP2966187B2 (en) * | 1991-08-14 | 1999-10-25 | 株式会社神戸製鋼所 | Rolling mill |
| JP4550213B2 (en) * | 2000-03-24 | 2010-09-22 | パスカルエンジニアリング株式会社 | Hydraulic locking device |
| KR100764119B1 (en) | 2004-02-25 | 2007-10-08 | 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 | Pilot Poppet Relief Valve |
| WO2006112011A1 (en) * | 2005-04-13 | 2006-10-26 | Ckd Corporation | Manual valve where mal function is prevented |
| CN2926717Y (en) * | 2006-04-18 | 2007-07-25 | 王复亮 | Self-locker of electromagnetic valve |
| KR101509259B1 (en) * | 2008-12-24 | 2015-04-06 | 두산인프라코어 주식회사 | Holding Valve of hydraulic device |
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2008
- 2008-12-24 KR KR20080133402A patent/KR101488022B1/en not_active Expired - Fee Related
-
2009
- 2009-12-23 CN CN2009102636171A patent/CN101761523B/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103299088A (en) * | 2010-12-28 | 2013-09-11 | 沃尔沃建造设备有限公司 | Holding valve for construction equipment |
| CN102242740A (en) * | 2011-07-07 | 2011-11-16 | 北京机械设备研究所 | Hydraulic lock of sliding valve structure |
| CN102678965A (en) * | 2012-05-25 | 2012-09-19 | 中煤北京煤矿机械有限责任公司 | Adjustable high-pressure lossless pressure-reducing valve for coal mine |
| CN102678965B (en) * | 2012-05-25 | 2013-08-21 | 中煤北京煤矿机械有限责任公司 | Adjustable high-pressure lossless pressure-reducing valve for coal mine |
| CN104968947A (en) * | 2013-02-05 | 2015-10-07 | 沃尔沃建造设备有限公司 | Construction equipment pressure control valve |
| US9611870B2 (en) | 2013-02-05 | 2017-04-04 | Volvo Construction Equipment Ab | Construction equipment pressure control valve |
| CN104295771A (en) * | 2014-10-16 | 2015-01-21 | 江苏恒立液压有限公司 | Pressure cut-off slice valve |
| CN113323941A (en) * | 2021-07-29 | 2021-08-31 | 江苏恒立液压股份有限公司 | Buffer device of oil cylinder and oil cylinder |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20100074859A (en) | 2010-07-02 |
| KR101488022B1 (en) | 2015-01-30 |
| CN101761523B (en) | 2013-08-28 |
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