CN104235107A - Shear-type lifting machine bypass reversing valve unloading loop - Google Patents
Shear-type lifting machine bypass reversing valve unloading loop Download PDFInfo
- Publication number
- CN104235107A CN104235107A CN201410475765.0A CN201410475765A CN104235107A CN 104235107 A CN104235107 A CN 104235107A CN 201410475765 A CN201410475765 A CN 201410475765A CN 104235107 A CN104235107 A CN 104235107A
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- CN
- China
- Prior art keywords
- selector valve
- reversing valve
- valve
- hydraulic pump
- lifting machine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002828 fuel tank Substances 0.000 claims description 14
- 238000010008 shearing Methods 0.000 claims description 10
- 230000008676 import Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 34
- 238000012423 maintenance Methods 0.000 description 3
- 230000009347 mechanical transmission Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000012089 stop solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
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- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a shear-type lifting machine bypass reversing valve unloading loop and belongs to the field of hydraulic transmission. The shear-type lifting machine bypass reversing valve unloading loop comprises an oil tank, a hydraulic pump, an overflow valve, a reversing valve A, a hydraulic cylinder and a reversing valve B, wherein an inlet oil tube of the hydraulic pump is connected with the oil tank, an outlet oil tube of the hydraulic pump is respectively connected with the overflow valve, the reversing valve A and the reversing valve B; oil return tubes of the overflow valve, the reversing valve A and the reversing valve B are connected with the oil tank; the hydraulic cylinder is connected with the reversing valve A. The shear-type lifting machine bypass reversing valve unloading loop is used for solving the problem that the service lives of the hydraulic pump and a motor are influenced by frequent start and stop of the hydraulic pump when an existing shear-type lifting machine executive component stops operation in a short time. The shear-type lifting machine bypass reversing valve unloading loop has the advantages of being simple in structure, reasonable in design and easy to manufacture.
Description
Technical field
The invention belongs to hydraulic transmission field, more particularly, relate to a kind of relief circuit of lifting machine hydraulic system.
Background technique
Along with the development of automobile industry, auto repair becomes an emerging industry gradually with maintenance.Wherein lifting machine is as the important tool in auto repair and servicing operations, have also been obtained and develops faster.Automobile is mainly brought up to another safe altitude from a safe altitude by lifting machine, so that manual operation and maintenance.Current lifting machine has a lot of type, can be divided into mechanical transmission and hydraulic transmission according to the kind of drive.Mechanical transmission structure is simple, low price, but lifting weight is restricted, and leading screw or work nut slide fastener easily occur, and there is larger potential safety hazard.And hydraulic transmission lifting machine Safety performance good, operate steadily, easy to maintenance and working efficiency is high, be current lifting machine transmission use mainstream type.For the hydraulic system of shearing type lifter, when its executive component short time quits work, do not need input hydraulic pressure oil, if now take the method for stop solution press pump to carry out the input of stop solution force feed, the life-span of oil hydraulic pump and motor can be affected because of start and stop frequently.For this reason, adopt relief circuit allow oil hydraulic pump off-load, make it with the running of very little output power, thus avoid start and stop frequently.
Summary of the invention
For existing shearing type lifter executive component when the short time quits work, the problem of oil hydraulic pump and electrical machinery life is affected because of frequent start-stop oil hydraulic pump, the invention provides the relief circuit of a kind of shearing type lifter bypass selector valve, by selector valve in parallel in working oil path, realize the off-load of oil hydraulic pump, thus avoid the frequent start-stop of oil hydraulic pump.
For solving the problem, the present invention adopts following technological scheme.
The relief circuit of a kind of shearing type lifter bypass selector valve, comprise fuel tank, oil hydraulic pump, relief valve, selector valve A, oil hydraulic cylinder, selector valve B, the import oil pipe of described oil hydraulic pump is connected with fuel tank, outlet oil pipe is connected with relief valve, selector valve A, selector valve B respectively, the return tube of described relief valve, selector valve A, selector valve B connects fuel tank, and described oil hydraulic cylinder is connected on selector valve A.
Described selector valve A is three-position four-way electromagnetic directional valve, and its Median Function is O type, and described selector valve B is bi-bit bi-pass solenoid directional control valve.
Compared to prior art, beneficial effect of the present invention is:
(1) the present invention is by selector valve in parallel in working oil path; bypass is utilized to carry out off-load to oil hydraulic pump; the hydraulic oil that oil hydraulic pump is exported flows back to fuel tank; make oil hydraulic pump in non-stop-machine situation; can operate with very little power; and the pressure oil exported compared with small flow, improve the working life of oil hydraulic pump and motor.
(2) structure of the present invention is simple, reasonable in design, is easy to manufacture.
Accompanying drawing explanation
Fig. 1 is hydraulic scheme of the present invention.
In figure: 1-fuel tank, 2-oil hydraulic pump, 3-relief valve, 4-selector valve A, 5-oil hydraulic cylinder, 6-selector valve B.
Embodiment
Describe the present invention below in conjunction with accompanying drawing.
As shown in Figure 1, the relief circuit of shearing type lifter bypass selector valve comprises fuel tank 1, oil hydraulic pump 2, relief valve 3, selector valve A4, oil hydraulic cylinder 5, selector valve B6, the import oil pipe of described oil hydraulic pump 2 is connected with fuel tank 1, outlet oil pipe is connected with relief valve 3, selector valve A4, selector valve B6 respectively, the return tube of described relief valve 3, selector valve A4, selector valve B6 connects fuel tank 1, and described oil hydraulic cylinder 5 is connected on selector valve A4.
Described selector valve A4 is three-position four-way electromagnetic directional valve, and its Median Function is O type, and described selector valve B6 is bi-bit bi-pass solenoid directional control valve.
embodiment 1
As shown in Figure 1, the relief circuit of shearing type lifter bypass selector valve comprises fuel tank 1, oil hydraulic pump 2, relief valve 3, selector valve A4, oil hydraulic cylinder 5, selector valve B6, the import oil pipe of described oil hydraulic pump 2 is connected with fuel tank 1, outlet oil pipe is connected with relief valve 3, selector valve A4, selector valve B6 respectively, the return tube of described relief valve 3, selector valve A4, selector valve B6 connects fuel tank 1, and described oil hydraulic cylinder 5 is connected on selector valve A4.
Described selector valve A4 is three-position four-way electromagnetic directional valve, and its Median Function is O type, and described selector valve B6 is bi-bit bi-pass solenoid directional control valve, and described relief valve 3 is direct-acting overflow valve.
Claims (3)
1. shearing type lifter bypass selector valve relief circuit, comprise fuel tank (1), oil hydraulic pump (2), relief valve (3), selector valve A(4), oil hydraulic cylinder (5), selector valve B(6), it is characterized in that, the import oil pipe of described oil hydraulic pump (2) is connected with fuel tank (1), outlet oil pipe respectively with relief valve (3), selector valve A(4), selector valve B(6) be connected, described relief valve (3), selector valve A(4), selector valve B(6) return tube connect fuel tank (1), described oil hydraulic cylinder (5) is connected to selector valve A(4) on.
2. shearing type lifter bypass selector valve according to claim 1 relief circuit, is characterized in that, described selector valve A(4) be three-position four-way electromagnetic directional valve, and its Median Function is O type.
3. shearing type lifter bypass selector valve according to claim 1 relief circuit, is characterized in that, described selector valve B(6) be bi-bit bi-pass solenoid directional control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410475765.0A CN104235107A (en) | 2014-09-18 | 2014-09-18 | Shear-type lifting machine bypass reversing valve unloading loop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410475765.0A CN104235107A (en) | 2014-09-18 | 2014-09-18 | Shear-type lifting machine bypass reversing valve unloading loop |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104235107A true CN104235107A (en) | 2014-12-24 |
Family
ID=52223824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410475765.0A Pending CN104235107A (en) | 2014-09-18 | 2014-09-18 | Shear-type lifting machine bypass reversing valve unloading loop |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104235107A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108278239A (en) * | 2018-04-28 | 2018-07-13 | 北京博望盛达商贸有限公司 | Effectively reduce the Full automatic bus lift frame hydraulic system of return oil pressure |
| CN110671392A (en) * | 2019-09-30 | 2020-01-10 | 福建龙马环卫装备股份有限公司 | Integral box hopper hydraulic system with manual emergency lift |
| CN113417907A (en) * | 2021-05-14 | 2021-09-21 | 天津市天锻压力机有限公司 | Auxiliary oil way pressure relief system for handling internal residual pressure of quick-insertion device and allowing plugging and unplugging |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3827453A (en) * | 1972-05-05 | 1974-08-06 | Parker Hannifin Corp | Directional control valve |
| CN201258883Y (en) * | 2008-08-29 | 2009-06-17 | 天水锻压机床有限公司 | Static pressure unloading cavity hydraulic control system |
| JP2010112494A (en) * | 2008-11-07 | 2010-05-20 | Sumitomo (Shi) Construction Machinery Co Ltd | Cavitation prevention circuit for working machine |
| CN201660825U (en) * | 2010-04-26 | 2010-12-01 | 河南省高远公路养护设备有限公司 | Hydraulic control device for bituminous concrete regeneration cold mixing equipment |
| CN101946096A (en) * | 2008-03-31 | 2011-01-12 | 纳博特斯克株式会社 | Hydraulic circuit for construction machine |
| CN103415709A (en) * | 2011-03-07 | 2013-11-27 | 沃尔沃建造设备有限公司 | Hydraulic circuit for pipe layer |
-
2014
- 2014-09-18 CN CN201410475765.0A patent/CN104235107A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3827453A (en) * | 1972-05-05 | 1974-08-06 | Parker Hannifin Corp | Directional control valve |
| CN101946096A (en) * | 2008-03-31 | 2011-01-12 | 纳博特斯克株式会社 | Hydraulic circuit for construction machine |
| CN201258883Y (en) * | 2008-08-29 | 2009-06-17 | 天水锻压机床有限公司 | Static pressure unloading cavity hydraulic control system |
| JP2010112494A (en) * | 2008-11-07 | 2010-05-20 | Sumitomo (Shi) Construction Machinery Co Ltd | Cavitation prevention circuit for working machine |
| CN201660825U (en) * | 2010-04-26 | 2010-12-01 | 河南省高远公路养护设备有限公司 | Hydraulic control device for bituminous concrete regeneration cold mixing equipment |
| CN103415709A (en) * | 2011-03-07 | 2013-11-27 | 沃尔沃建造设备有限公司 | Hydraulic circuit for pipe layer |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108278239A (en) * | 2018-04-28 | 2018-07-13 | 北京博望盛达商贸有限公司 | Effectively reduce the Full automatic bus lift frame hydraulic system of return oil pressure |
| CN110671392A (en) * | 2019-09-30 | 2020-01-10 | 福建龙马环卫装备股份有限公司 | Integral box hopper hydraulic system with manual emergency lift |
| CN113417907A (en) * | 2021-05-14 | 2021-09-21 | 天津市天锻压力机有限公司 | Auxiliary oil way pressure relief system for handling internal residual pressure of quick-insertion device and allowing plugging and unplugging |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20141224 |