CN204163621U - A kind of outer combining hydraulic system of valve of load-sensitive - Google Patents
A kind of outer combining hydraulic system of valve of load-sensitive Download PDFInfo
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- CN204163621U CN204163621U CN201420612318.0U CN201420612318U CN204163621U CN 204163621 U CN204163621 U CN 204163621U CN 201420612318 U CN201420612318 U CN 201420612318U CN 204163621 U CN204163621 U CN 204163621U
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Abstract
The utility model discloses a kind of outer combining hydraulic system of valve of load-sensitive, comprise load sensitive pump, gear pump, pressurization oil cylinder, load-sensitive valve, gear pump is arranged between load-sensitive valve and pressurization oil cylinder.Micro-drill load sensitive fluid pressing system of the present utility model, while unit head speed-raising, do not reduce moment of torsion, more can not affect the operation of load sensitive system, simultaneously the maximized power utilizing system, when some action in rig does not use, can collaborate to turn round to unit head by interflow function, make rate of penetration faster, also can enter pressurization lift cylinder by interflow, complete machine drilling efficiency is improved greatly.
Description
Technical field
The utility model relates to a kind of load-sensitive hydraulic system, is specifically related to a kind of outer combining hydraulic system of valve of the load-sensitive for micro-rig.
Background technology
Micro-rig is mainly used in micro-boring, anchoring slope protection construction etc., can be used for the fields such as foundation construction, deep foundation pit construction, mine construction, water conservancy construction and constructing tunnel, in Multifunctional micropile rig field, very high to the rotation speed requirements of unit head, when moment of torsion is identical, all wish that rotating speed can be tried one's best greatly.Drilling efficiency can be made so higher, so when not increasing power source power, the rotating speed increasing unit head is of practical significance very much.In load sensitive system, principle features due to load-sensitive is restriction and the relation between pressure reduction and flow, so the system of all not collaborating again in load-sensitive loop, because interflow can affect pressure reduction before and after restriction before restriction, have impact on pressure reduction will the swash plate of variation pump, and load sensitive system can be made so completely ineffective.Therefore, arbitrarily can not collaborate in load sensitive system, otherwise can system be destroyed.
Utility model content
The purpose of this utility model be to provide a kind of do not change the prerequisite of unit head moment of torsion under improve unit head rotating speed valve collaborate load-sensitive hydraulic system outward.
The purpose of this utility model is achieved like this: a kind of outer combining hydraulic system of valve of load-sensitive, for micro-rig, comprises load sensitive pump, pressurization oil cylinder, load-sensitive valve, also comprises gear pump, and gear pump is arranged between load-sensitive valve and pressurization oil cylinder.
The beneficial effects of the utility model are: the valve of load-sensitive hydraulic system collaborates outward while unit head speed-raising, not reduce moment of torsion, more can not affect the operation of load sensitive system; The maximized power utilizing system simultaneously, when some action in rig does not use, can collaborate, to unit head revolution, to make rate of penetration faster by interflow function, also can enter pressurization lift cylinder by interflow, complete machine drilling efficiency is improved greatly.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, simple introduction is done below by the accompanying drawing used required in embodiment or description of the prior art, apparently, accompanying drawing in the following describes is embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the utility model embodiment prior art structural representation;
Fig. 2 is the utility model example structure schematic diagram;
1, gear pump; 2, reversal valve; 3, pressure-compensated valve; 4, pressurize oil cylinder; 5, load sensitive pump; 6, load-sensitive valve
; 7, load-sensitive valve
.
Detailed description of the invention
Below by specific embodiment, the utility model is further described.
As shown in Figure 2, a kind of outer combining hydraulic system of valve of load-sensitive, for micro-rig, comprises load sensitive pump 5, pressurization oil cylinder 4, load-sensitive valve
6, load-sensitive valve
7, pressure-compensated valve 3, gear pump 1, gear pump 1 is arranged between load-sensitive valve and pressurization oil cylinder 4, before pressure-compensated valve 3 is arranged on in-line load-sensitive valve, valve collaborates outward to refer to: several hydraulic pump, the utility model embodiment refers to gear pump 1 and load sensitive pump 5, respectively by respective valve rod, passes through load-sensitive valve
7 and the interlock of reversal valve 2 handle, collaborate fuel feeding outward to the hydraulic actuator at required interflow at valve rod.
Load-sensitive hydraulic system is that one experiences system pressure-traffic demand, and the hydraulic system of required flow and pressure is only provided, load sensitive pump is a Variable plunger pump, when idle, holding state can be kept at lower pressures, when proceeding to duty, adjustable flow can be provided according to working conditions change and traffic demand, when hydraulic system does not work, when being in holding state, load-sensitive valve cuts off the pressure signal between pressurization oil cylinder and load sensitive pump, makes load sensitive pump automatically proceed to low pressure wait state.When Ioad-sensing control valve works, obtain pressure demand from pressurization oil cylinder (or motor), and by pressure signal transmission to load sensitive pump, make load sensitive pump start to respond to system pressure, the flow needed for system is controlled by the aperture of valve.The traffic demand of system feeds back to Ioad-sensing control pump by the responsive control valve of negative pressure.The basic function that the combination of this variable piston formula load sensitive pump and load-sensitive valve makes whole hydraulic system have to provide according to load condition to need pressure, the characteristic of flow is load sensitive system.As shown in Figure 1, in the load-sensitive hydraulic system of prior art, the impact of pressure reduction change and restriction size is subject to by the flow of restriction A1, A2, pressure reduction change is then controlled by pressure-compensated valve, before pressure-compensated valve is arranged on in-line load-sensitive valve, principle thus, the pressure reduction change adjustment swash plate angle that load sensitive pump is produced by the change of induction restriction, reach pressure reduction by meeting flow, thus achieve as required for stream, low force down stream standby.
As shown in Figure 2, when being incorporated into before restriction with a gear pump 1, because pressure reduction and restriction are still as above, so adding of gear pump 1 causes load sensitive pump swash plate extremely to reduce, meet restriction pressure reduction reach balance by reducing main pump delivery, do not reach speed-raising object like this, upset the operation of load sensitive system on the contrary.When a gear pump 1 is incorporated into after restriction, because flow is no longer through restriction, so pressure compensator cannot experience the change of this constant displacement pump flow, and only experience the pressure reduction change that load-reacting POF causes, so the interflow achieved in load sensitive system of real meaning.
The valve of the load-sensitive hydraulic system of the present embodiment collaborates outward while unit head speed-raising, not reduce moment of torsion, more can not affect the operation of load sensitive system; The maximized power utilizing system simultaneously, when some action in rig does not use, can collaborate, to unit head revolution, to make rate of penetration faster by interflow function, also can enter pressurization lift cylinder by interflow, complete machine drilling efficiency is improved greatly.
Apply specific embodiment herein to set forth principle of the present utility model and embodiment, the explanation of above embodiment just understands method of the present utility model and core concept thereof for helping.The above is only preferred embodiment of the present utility model, should be understood that, due to the finiteness of literal expression, and objectively there is infinitely concrete concrete structure, for those skilled in the art, under the prerequisite not departing from the utility model principle, some improvement, retouching or change can also be made, also above-mentioned technical characteristic can be combined by rights; These improve retouching, change or combination, or the design of utility model and technical scheme are directly applied to other occasions without improving, and all should be considered as protection domain of the present utility model.
Claims (1)
1. the outer combining hydraulic system of the valve of load-sensitive, for micro-rig, comprises load sensitive pump, pressurization oil cylinder, and load-sensitive valve, characterized by further comprising gear pump, and gear pump is arranged between load-sensitive valve and pressurization oil cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420612318.0U CN204163621U (en) | 2014-10-22 | 2014-10-22 | A kind of outer combining hydraulic system of valve of load-sensitive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420612318.0U CN204163621U (en) | 2014-10-22 | 2014-10-22 | A kind of outer combining hydraulic system of valve of load-sensitive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204163621U true CN204163621U (en) | 2015-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420612318.0U Active CN204163621U (en) | 2014-10-22 | 2014-10-22 | A kind of outer combining hydraulic system of valve of load-sensitive |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105089491A (en) * | 2015-07-27 | 2015-11-25 | 北京市三一重机有限公司 | Rotary drilling rig |
| CN114658708A (en) * | 2022-04-11 | 2022-06-24 | 华侨大学 | Load rotating speed double-sensitive anti-flow saturation system and engineering mechanical device thereof |
-
2014
- 2014-10-22 CN CN201420612318.0U patent/CN204163621U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105089491A (en) * | 2015-07-27 | 2015-11-25 | 北京市三一重机有限公司 | Rotary drilling rig |
| CN114658708A (en) * | 2022-04-11 | 2022-06-24 | 华侨大学 | Load rotating speed double-sensitive anti-flow saturation system and engineering mechanical device thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200327 Address after: 410600 Room 203, building 3, phase II, Depu Wuhe Enterprise Park, No. 1, luojitang Road, Changsha Economic and Technological Development Zone, Hunan Province Patentee after: Hunan Youjuan Engineering Technology Co., Ltd Address before: 410323, No. three, No. 8, weft Road, Yongan manufacturing industry zone, Changsha, Hunan, Liuyang (Changsha new century muffler factory) Patentee before: UNIMATE HEAVY INDUSTRY Co.,Ltd. |
|
| TR01 | Transfer of patent right |