CN201794850U - Hydraulic reversing valve capable of conducting overload protection function in pressure maintaining process - Google Patents
Hydraulic reversing valve capable of conducting overload protection function in pressure maintaining process Download PDFInfo
- Publication number
- CN201794850U CN201794850U CN2010205488057U CN201020548805U CN201794850U CN 201794850 U CN201794850 U CN 201794850U CN 2010205488057 U CN2010205488057 U CN 2010205488057U CN 201020548805 U CN201020548805 U CN 201020548805U CN 201794850 U CN201794850 U CN 201794850U
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- Prior art keywords
- valve
- oil
- hydraulicdirectional control
- control valve
- valve body
- Prior art date
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- Expired - Lifetime
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Abstract
The utility model relates to a hydraulic reversing valve capable of conducting an overload protection function in a pressure maintaining process, which comprises a valve body of the hydraulic reversing valve, an oil cylinder, a safety overflow valve and a shuttle valve, wherein the oil opening of the valve body of the hydraulic reversing valve accesses the inside of an oil tank; an oil pipe led from the oil opening of the oil cylinder is divided into two paths, namely a path to the inside of the valve body of the hydraulic reversing valve and a path to the inside of the shuttle valve, the oil outlet of the shuttle valve is connected with the oil inlet of the safety overflow valve, and the oil outlet of the safety overflow valve is connected to the inside of he valve body of the hydraulic reversing valve through a pipe; and a pipe led out from an oil inlet is provided with a one-way valve, and an oil pipe led out from the outlet end of the one-way valve is divided into two paths, namely a path to the inside of the valve body of the hydraulic reversing valve and a path to the inside of the shuttle valve. The hydraulic reversing valve is cable of conducting the overload protection function the pressure maintaining process, avoids cylinder explosion or damage of a certain weak link in the system, can be used in new environments and is more safe and reliable.
Description
Technical field
The utility model 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 purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of hydraulicdirectional control valve with overloading protecting function during pressure maintaining is provided.
The technological scheme that provides according to the utility model, 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 utlity model has overloading protecting function during pressure maintaining, avoided the situation that a certain weak link is damaged in detonation or the system, enlarged the hydraulicdirectional control valve Environmental Conditions, make hydraulicdirectional control valve more safe and reliable.
Description of drawings
Fig. 1 is an overall structure schematic representation of the present utility model.
Embodiment
The utility model is described in further detail 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 |
|---|---|---|---|
| CN2010205488057U CN201794850U (en) | 2010-09-30 | 2010-09-30 | Hydraulic reversing valve capable of conducting overload protection function in pressure maintaining process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205488057U CN201794850U (en) | 2010-09-30 | 2010-09-30 | Hydraulic reversing valve capable of conducting overload protection function in pressure maintaining process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201794850U true CN201794850U (en) | 2011-04-13 |
Family
ID=43849759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205488057U Expired - Lifetime CN201794850U (en) | 2010-09-30 | 2010-09-30 | Hydraulic reversing valve capable of conducting overload protection function in pressure maintaining process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201794850U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101922480A (en) * | 2010-09-30 | 2010-12-22 | 无锡英特帕普威孚液压有限责任公司 | Hydraulic reversing valve with overloading protecting function during pressure maintaining |
| CN109812459A (en) * | 2019-03-19 | 2019-05-28 | 浙江凯斯特液压有限公司 | A kind of lifting valve of dump truck |
-
2010
- 2010-09-30 CN CN2010205488057U patent/CN201794850U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101922480A (en) * | 2010-09-30 | 2010-12-22 | 无锡英特帕普威孚液压有限责任公司 | Hydraulic reversing valve with overloading protecting function during pressure maintaining |
| CN101922480B (en) * | 2010-09-30 | 2012-05-30 | 无锡英特帕普威孚液压有限责任公司 | Hydraulic reversing valve with overloading protecting function during pressure maintaining |
| CN109812459A (en) * | 2019-03-19 | 2019-05-28 | 浙江凯斯特液压有限公司 | A kind of lifting valve of dump truck |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110413 Effective date of abandoning: 20120530 |