CN85103780A - Hydraulic delay two-stage brake hydraulic station - Google Patents
Hydraulic delay two-stage brake hydraulic station Download PDFInfo
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- CN85103780A CN85103780A CN198585103780A CN85103780A CN85103780A CN 85103780 A CN85103780 A CN 85103780A CN 198585103780 A CN198585103780 A CN 198585103780A CN 85103780 A CN85103780 A CN 85103780A CN 85103780 A CN85103780 A CN 85103780A
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Abstract
Hydraulic delay two-stage brake hydraulic station is realized two stage braking by the hydraulic pressure time-delay valve group of being made up of time-delay valve, series flow control valve, one-way valve, is used for various enhancing transport machinery, particularly large-scale hoister safety brake.This hydraulic station reliable performance, delay time is stable, good reproducibility, easy to adjust, manufacturing is easy, is fit to China's national situation, for the safe operation of lift provides reliable assurance.Also can be used in other enhancing transport machinery such as ship lift, ropeway, for these machineries provide reliable safety brake.
Description
The invention belongs to hydraulics and be used for various liftings, Transport Machinery, particularly the large-scale hoister safety brake is used.
The lift hydraulic station that China's the seventies is produced during emergency braking, is regulated with a throttling rod, and delay time has only 0～0.3 second, and the two stage braking process is very not obvious.Lift in the high speed operation stops suddenly, and inertia is very big, often causes in the well major accidents such as cage impact, steel rope breaking or steel cable seriously skid, and directly has influence on and produces and personal safety.
Use the two-stage brake hydraulic station of direct current time relay control later on instead, increased the spring accumulator in the hydraulic system, the mine hoist safety motion has had assurance substantially.But this electrical delay method wants a cover electrical system to cooperate, and brings a lot of troubles to electrical design; And the direct current time relay is subjected to climatic change, and delay time slightly changes; Add 5～10 seconds the direct current time relay supply of material difficulty that the relay factory produces, cause certain difficulty to supporting and use.
The lift that Sweden ASEA company produces adopts hydraulic delay two-stage brake hydraulic station for a long time.But their hydraulic station, operating oil pressure height, system complex, the domestic not development as yet of hydraulic element are not suitable for the current national conditions of China.
The hydraulic delay two-stage brake hydraulic station of Luoyang mining machinery Research Institute replaces the electric time relay with a hydraulic pressure time-delay valve.Its time-delay valve comes control flow rate with regulating the throttling rod position, and with the variation of throttling rod two ends pressure reduction, the flow of discharging from time-delay valve changes, and delay time is stable inadequately, is difficult for harmonizing.
The present invention replaces time-delay valve with a hydraulic pressure time-delay valve group in hydraulic delay two-stage brake hydraulic station, guaranteed the stable of delay time.
Fig. 1. the hydraulic delay two-stage brake hydraulic station schematic diagram
1. fuel tank 2. filters
3. motor 4. oil pumps
5. electro-hydraulic pressure regulator device 6. relief valves
7. reduction valve 8. one-way valves
9. time-delay valve group 10. accumulators
11.12.13.14. solenoid directional control valve
This Hydraulic Station principle is seen Fig. 1. It is made up of fuel tank (1), filter (2), motor (3), oil pump (4), electro-hydraulic pressure regulator device (5), pressure-reducing valve (7), check valve (8), accumulator (10), solenoid directional control valve (11) (12) (13) and time-delay valve group (9).
Service braking is partly mainly finished by electro-hydraulic pressure regulator device.Safety brake partly cooperates other elements to finish by time-delay valve group (9).The time-delay valve group is made up of time-delay valve, one-way valve, series flow control valve.Time-delay valve " 1 " mouth links to each other with brake cylinder, " 2 " mouthful logical accumulator, and " 3 " mouthful logical fuel tank, " 4 " mouth links to each other with working connection by one-way valve, series flow control valve.For guaranteeing the pressure stability in the accumulator, add relief valve (6).
When having an accident, arbitrary protection contact is opened in the electic protection loop, motor (3) outage, and oil pump (4) fuel cut-off, working connection oil pressure are zero.The electromagnet of solenoid directional control valve (12) (13) outage simultaneously, the in-oil cylinder pressure oil that connects with the I pipe directly flows back to fuel tank.One-way valve (8) closes dead automatically, and the in-oil cylinder pressure oil that connects with the II pipe promotes the time-delay valve spool, and " 1 ", " 2 " mouth communicates, and promptly communicates with accumulator, and the oil cylinder internal pressure drops to accumulator preset oil pressure value, by the accumulator pressurize." 4 " mouth pressure oil slowly oil extraction from the series flow control valve restriction simultaneously.Pressure oil continues to promote the time-delay valve spool, and " 1 ", " 2 ", " 3 " mouth communicate, and oil pressure drops to zero, realizes two stage braking.
Fig. 2. delay time is identical, PIThe different two stage braking characteristic curve of level braking oil pressure value.
Fig. 3 .PILevel braking oil pressure value is constant, the two stage braking characteristic that delay time is different Curve.
Two stage braking oil pressure variation characteristic curve is shown in Fig. 2,3. The test acquired results is with theoretical approximate. When oil pressure drops to the B point from the A point. The brake that connects with the I pipe is in on-position, drops to P with oil pressure in the brake oil cylinder that the II pipe connectsIValue, by the accumulator pressurize, whole system is subjected to 1/2 braking moment, and operation reduces speed now. Time-delay t arrives the c point second afterwards, system shutdown, and oil circuit communicates with fuel tank, and oil pressure drops to the D point, and braking moment all adds, has finished two stage braking. P whereinIThe level oil pressure value is the accumulator preset pressure, has reflected the value of first order braking moment, is set up by pressure-reducing valve (7), overflow valve (6). Time-delay valve oil extraction speed has determined the length of delay time, by flow speed control valve control flow. Because flow speed control valve has the pressure compensation effect, make delay time stable.
In order to adapt to better some special circumstances, use elevator in the well head brake hard such as vertical shaft, can not use two stage braking. Solenoid directional control valve (11) adopts direct current, and directly and II pipe brake join, be not subjected to the impact of other valve fault. When total system cuts off the power supply suddenly, because solenoid directional control valve (11) adopts direct current, can get through as required or close, to realize one-level braking or two stage braking.
This Hydraulic Station also can be taken over III, settles adjusting rope device, transfers rop exercise to do by solenoid directional control valve (14).
Hydraulic delay two-stage brake hydraulic station of the present invention, reliable performance, stable, the good reproducibility of delay time, and manufacturing is easy, is fit to China's national situation, is specially adapted to the transformation to existing mine hoist is for the safe operation of lift provides assurance.This hydraulic station also can be used for ship lift, in other liftings such as ropeway, the Transport Machinery except that being used for the mine hoist safety braking.
Claims (2)
1, hydraulic delay two-stage brake hydraulic station is made up of fuel tank (1), filter (2), motor (3), oil pump (4), electro-hydraulic pressure regulator device (5), reduction valve (7), one-way valve (8), accumulator (10), solenoid directional control valve (11) (12) (13), it is characterized in that by the time-delay valve group of being made up of time-delay valve, one-way valve, series flow control valve (9).
2, also be the direct and II pipe break connection of solenoid directional control valve (12) as its feature of the said hydraulic station of claim 1, and be DC electromagnetic valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN198585103780A CN85103780A (en) | 1985-05-08 | 1985-05-08 | Hydraulic delay two-stage brake hydraulic station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN198585103780A CN85103780A (en) | 1985-05-08 | 1985-05-08 | Hydraulic delay two-stage brake hydraulic station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN85103780A true CN85103780A (en) | 1986-11-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN198585103780A Pending CN85103780A (en) | 1985-05-08 | 1985-05-08 | Hydraulic delay two-stage brake hydraulic station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85103780A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101475130B (en) * | 2009-01-22 | 2010-09-22 | 重庆键英液压机电有限公司 | Hydraulic time-delay double-stage braking hoister hydraulic station |
| CN101367484B (en) * | 2008-07-14 | 2011-01-19 | 平顶山煤业(集团)有限责任公司 | Double-stage braking hydraulic station with high-reliability scavenge oil and control method thereof |
| CN102139840A (en) * | 2011-04-08 | 2011-08-03 | 中信重工机械股份有限公司 | Dual-setting value constant torque secondary braking control system of mine hoister |
| CN104876105A (en) * | 2015-06-26 | 2015-09-02 | 徐州大恒测控技术有限公司 | Hand-operated pressure relief device and method with second-level safety braking |
| CN104912865A (en) * | 2015-06-26 | 2015-09-16 | 徐州大恒测控技术有限公司 | Mechanical-delay two-stage braking manual emergency oil return device and method |
| CN105317760A (en) * | 2015-11-20 | 2016-02-10 | 连云港天明装备有限公司 | Start delay warning device for coal mine down-hole mine vehicle |
-
1985
- 1985-05-08 CN CN198585103780A patent/CN85103780A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101367484B (en) * | 2008-07-14 | 2011-01-19 | 平顶山煤业(集团)有限责任公司 | Double-stage braking hydraulic station with high-reliability scavenge oil and control method thereof |
| CN101475130B (en) * | 2009-01-22 | 2010-09-22 | 重庆键英液压机电有限公司 | Hydraulic time-delay double-stage braking hoister hydraulic station |
| CN102139840A (en) * | 2011-04-08 | 2011-08-03 | 中信重工机械股份有限公司 | Dual-setting value constant torque secondary braking control system of mine hoister |
| CN104876105A (en) * | 2015-06-26 | 2015-09-02 | 徐州大恒测控技术有限公司 | Hand-operated pressure relief device and method with second-level safety braking |
| CN104912865A (en) * | 2015-06-26 | 2015-09-16 | 徐州大恒测控技术有限公司 | Mechanical-delay two-stage braking manual emergency oil return device and method |
| CN104876105B (en) * | 2015-06-26 | 2016-08-10 | 徐州大恒测控技术有限公司 | A kind of manual secondary safety braking pressure relief device and method |
| CN105317760A (en) * | 2015-11-20 | 2016-02-10 | 连云港天明装备有限公司 | Start delay warning device for coal mine down-hole mine vehicle |
| CN105317760B (en) * | 2015-11-20 | 2017-12-05 | 连云港天明装备有限公司 | Underground coal mine is mining vehicle start-up study warning device |
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| WD01 | Invention patent application deemed withdrawn after publication |