CN101922480A - Hydraulic reversing valve with overloading protecting function during pressure maintaining - Google Patents
Hydraulic reversing valve with overloading protecting function during pressure maintaining Download PDFInfo
- Publication number
- CN101922480A CN101922480A CN201010297309.3A CN201010297309A CN101922480A CN 101922480 A CN101922480 A CN 101922480A CN 201010297309 A CN201010297309 A CN 201010297309A CN 101922480 A CN101922480 A CN 101922480A
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- valve
- hydraulicdirectional control
- control valve
- valve body
- inserts
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Abstract
The invention relates to a hydraulic reversing valve with an overloading protecting function during pressure maintaining, which comprises a hydraulic reversing valve body and a hydraulic cylinder, wherein a hydraulic fluid port of the hydraulic reversing valve body is connected into an oil tank. The hydraulic reversing valve also comprises a safety overflow valve and a shuttle valve, an oil tube connecting from the hydraulic fluid port of the hydraulic cylinder is divided into two branches, one branch is connected into the hydraulic reversing valve body and the other branch is connected into the shuttle valve, an oil outlet of the shuttle valve is connected with an oil inlet of the safety overflow valve, and an oil outlet of the safety overflow valve is connected into the hydraulic reversing valve body through a pipeline; and a pipeline connecting from the oil inlet is provided with a one-way valve, an oil tube connecting from the outlet end of the one-way valve is divided into two branches, one branch is connected into the hydraulic reversing valve body and the other branch is connected into the shuttle body. The invention has overloading protecting function during pressure maintaining, avoids cylinder explosion and the condition that one weak link in a system is damaged, enlarges the application range of the hydraulic reversing valve, and ensures that the hydraulic reversing valve is safer and more reliable.
Description
Technical field
The present invention relates to a kind of hydraulicdirectional control valve, especially a kind of hydraulicdirectional control valve with overloading protecting function during pressure maintaining.
Background technique
Along with expanding economy, the application of dump truck more and more widely, as with the matching used hydraulicdirectional control valve of dumping car, also obtained widely development.The hydraulic distributing valve of present domestic use only is provided with overload protection when oil-feed is transshipped; and after in case fluid enters oil cylinder; in pressure maintaining period; when if the situation of sudden changes in pressure occurring; do not design the pressurize overload protection, the situation that a certain weak link is damaged in detonation or the system appears in the possibility of result that causes like this.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of hydraulicdirectional control valve with overloading protecting function during pressure maintaining is provided.
According to technological scheme provided by the invention, described hydraulicdirectional control valve with pressurize overload function, comprise hydraulicdirectional control valve valve body and oil cylinder, the hydraulicdirectional control valve valve body has main valve stem, on the hydraulicdirectional control valve valve body, offer first compressed air inlet that drives the main valve stem move left and right, second compressed air inlet, the hydraulic fluid port of hydraulicdirectional control valve valve body inserts in the fuel tank, it is characterized in that, also comprise safety overflow valve and shuttle valve, the oil pipe portion that the hydraulic fluid port of oil cylinder picks out is two, article one, branch road inserts in the hydraulicdirectional control valve valve body, another branch road inserts in the shuttle valve, the oil outlet of shuttle valve connects the filler opening of safety overflow valve, and the oil outlet of safety overflow valve inserts in the hydraulicdirectional control valve valve body by pipeline, and enters fuel tank by valve flowing channel;
On the pipeline that filler opening even goes out one-way valve is installed, the oil pipe that the outlet end of one-way valve picks out is divided into two branch roads, and a branch road inserts in the hydraulicdirectional control valve valve body, and another branch road inserts in shuttle valve.
The pipeline that the oil outlet of safety overflow valve picks out inserts in the hydraulicdirectional control valve valve body and by inner flow passage and inserts in the fuel tank.
The present invention has overloading protecting function during pressure maintaining, has avoided the situation that a certain weak link is damaged in detonation or the system, has enlarged the hydraulicdirectional control valve Environmental Conditions, makes hydraulicdirectional control valve more safe and reliable.
Description of drawings
Fig. 1 is an overall structure schematic representation of the present invention.
Embodiment
The invention will be further described below in conjunction with concrete drawings and Examples.
As shown in the figure, this has the hydraulicdirectional control valve of pressurize overload function, comprise hydraulicdirectional control valve valve body 1 and oil cylinder 2, hydraulicdirectional control valve valve body 1 has main valve stem 3, on hydraulicdirectional control valve valve body 1, offer the first compressed air inlet a that drives main valve stem 3 move left and right, the second compressed air inlet b, the hydraulic fluid port of hydraulicdirectional control valve valve body 1 inserts in the fuel tank T, also comprise safety overflow valve 4 and shuttle valve 5, the oil pipe portion that the hydraulic fluid port of oil cylinder 2 picks out is two, article one, branch road inserts in the hydraulicdirectional control valve valve body 1, another branch road inserts in the shuttle valve 5, the oil outlet of shuttle valve 5 connects the filler opening of safety overflow valve 4, and the oil outlet of safety overflow valve 4 inserts in the hydraulicdirectional control valve valve body 1 by pipeline;
On the pipeline that oil inlet P even goes out one-way valve 6 is installed, the oil pipe portion that the outlet end of one-way valve 6 picks out is that two, one branch roads insert in the hydraulicdirectional control valve valve bodies 1, and another branch road inserts in shuttle valve 5.
The pipeline that the oil outlet of safety overflow valve 4 picks out inserts in the hydraulicdirectional control valve valve body 1 and by inner flow passage and inserts in the fuel tank T.
As shown in Figure 1, the P mouth is a filler opening, and the C mouth is an oil outlet, and the T mouth is a return opening, and a mouth is that first compressed air inlet, b mouth are second compressed air inlet.
When pressurized air when a mouth enters cylinder block, main valve stem moves to right, position, a left side is inserted, as shown in Figure 1, after hydraulic oil enters from the P mouth, enter hydraulic jack through the valve inner runner from the C mouth, this moment, oil hydraulic cylinder was in the process of stretching out, simultaneously, because the P mouth pressure is higher than the C mouth pressure, shuttle valve is in upper, and hydraulic oil enters safety overflow valve from the P mouth through shuttle valve, after oil cylinder all stretches out, oil liquid pressure in the system raises, when pressure was elevated to the cracking pressure of safety valve, safety valve was opened, and hydraulic oil is got back to fuel tank from safety valve;
Behind the pressurized air of closing a mouth, main valve stem is moved to the left under the effect of spring force, at this moment, the fluid in the oil cylinder can't be got back to fuel tank, and oil cylinder is in packing state, can directly get back to fuel tank from the hydraulic oil that the P mouth enters, simultaneously because the P mouth pressure is in the nextly less than C mouth pressure shuttle valve, hydraulic oil enters safety overflow valve from oil cylinder through shuttle valve, when the pressure in the oil cylinder is subjected to impacting unexpected increase and surpasses the cracking pressure of safety valve, safety overflow valve is opened, and has protected the Security of whole system;
When pressurized air when the b mouth enters cylinder block, main valve stem moves to left, right position is inserted, the fluid in the fuel tank can directly be got back to fuel tank through valve body, directly gets back to fuel tank from the hydraulic oil that the P mouth enters through valve body, this moment, oil cylinder was in the decline state.
Claims (2)
1. hydraulicdirectional control valve with overloading protecting function during pressure maintaining, comprise hydraulicdirectional control valve valve body (1) and oil cylinder (2), hydraulicdirectional control valve valve body (1) has main valve stem (3), on hydraulicdirectional control valve valve body (1), offer first compressed air inlet (a) that drives main valve stem (3) move left and right, second compressed air inlet (b), the hydraulic fluid port of hydraulicdirectional control valve valve body (1) inserts in the fuel tank (T), it is characterized in that: also comprise safety overflow valve (4) and shuttle valve (5), the oil pipe portion that the hydraulic fluid port of oil cylinder (2) picks out is two, article one, branch road inserts in the hydraulicdirectional control valve valve body (1), another branch road inserts in the shuttle valve (5), the oil outlet of shuttle valve (5) connects the filler opening of safety overflow valve (4), and the oil outlet of safety overflow valve (4) inserts in the hydraulicdirectional control valve valve body (1) by pipeline;
On the pipeline that filler opening (P) even goes out one-way valve (6) is installed, the oil pipe that the outlet end of one-way valve (6) picks out is divided into two branch roads, and a branch road inserts in the hydraulicdirectional control valve valve body (1), and another branch road inserts in shuttle valve (5).
2. the hydraulicdirectional control valve with overloading protecting function during pressure maintaining as claimed in claim 1 is characterized in that: the pipeline that the oil outlet of safety overflow valve (4) picks out inserts in the hydraulicdirectional control valve valve body (1) and by inner flow passage and inserts in the fuel tank (T).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102973093A CN101922480B (en) | 2010-09-30 | 2010-09-30 | Hydraulic reversing valve with overloading protecting function during pressure maintaining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102973093A CN101922480B (en) | 2010-09-30 | 2010-09-30 | Hydraulic reversing valve with overloading protecting function during pressure maintaining |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101922480A true CN101922480A (en) | 2010-12-22 |
| CN101922480B CN101922480B (en) | 2012-05-30 |
Family
ID=43337606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102973093A Expired - Fee Related CN101922480B (en) | 2010-09-30 | 2010-09-30 | Hydraulic reversing valve with overloading protecting function during pressure maintaining |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101922480B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108223479A (en) * | 2018-01-31 | 2018-06-29 | 邹城市益凯德液压有限公司 | The high flow manual reversal valve of included overload protection |
| CN108488127A (en) * | 2018-04-29 | 2018-09-04 | 锦州力特液压科技有限公司 | The two position switching valve groups for all-hydraulic tunnel drilling rig executing agency |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55166507A (en) * | 1979-06-15 | 1980-12-25 | Hitachi Constr Mach Co Ltd | Circuit for hydraulically movable device |
| CN2464777Y (en) * | 2001-02-27 | 2001-12-12 | 华南理工大学 | Hydraulic-pneumatic driving device for hydraulic piling hammer |
| CN2769328Y (en) * | 2005-03-10 | 2006-04-05 | 李发玉 | Hydraulic control system for multi-hammer head crusher |
| CN201588830U (en) * | 2010-01-13 | 2010-09-22 | 徐州徐工随车起重机有限公司 | Hydraulic winch motor balancing valve with pressure protecting function |
| CN201794850U (en) * | 2010-09-30 | 2011-04-13 | 无锡英特帕普威孚液压有限责任公司 | Hydraulic reversing valve capable of conducting overload protection function in pressure maintaining process |
-
2010
- 2010-09-30 CN CN2010102973093A patent/CN101922480B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55166507A (en) * | 1979-06-15 | 1980-12-25 | Hitachi Constr Mach Co Ltd | Circuit for hydraulically movable device |
| CN2464777Y (en) * | 2001-02-27 | 2001-12-12 | 华南理工大学 | Hydraulic-pneumatic driving device for hydraulic piling hammer |
| CN2769328Y (en) * | 2005-03-10 | 2006-04-05 | 李发玉 | Hydraulic control system for multi-hammer head crusher |
| CN201588830U (en) * | 2010-01-13 | 2010-09-22 | 徐州徐工随车起重机有限公司 | Hydraulic winch motor balancing valve with pressure protecting function |
| CN201794850U (en) * | 2010-09-30 | 2011-04-13 | 无锡英特帕普威孚液压有限责任公司 | Hydraulic reversing valve capable of conducting overload protection function in pressure maintaining process |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108223479A (en) * | 2018-01-31 | 2018-06-29 | 邹城市益凯德液压有限公司 | The high flow manual reversal valve of included overload protection |
| CN108223479B (en) * | 2018-01-31 | 2024-03-29 | 山东益凯德液压股份有限公司 | Large-flow manual reversing valve with overload protection |
| CN108488127A (en) * | 2018-04-29 | 2018-09-04 | 锦州力特液压科技有限公司 | The two position switching valve groups for all-hydraulic tunnel drilling rig executing agency |
| CN108488127B (en) * | 2018-04-29 | 2023-11-14 | 锦州力特液压科技有限公司 | Two-position reversing valve group for actuating mechanism of full-hydraulic tunnel drilling machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101922480B (en) | 2012-05-30 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20210930 |
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| CF01 | Termination of patent right due to non-payment of annual fee |