CN1047261A - Oil lifter - Google Patents
Oil lifter Download PDFInfo
- Publication number
- CN1047261A CN1047261A CN90102689A CN90102689A CN1047261A CN 1047261 A CN1047261 A CN 1047261A CN 90102689 A CN90102689 A CN 90102689A CN 90102689 A CN90102689 A CN 90102689A CN 1047261 A CN1047261 A CN 1047261A
- Authority
- CN
- China
- Prior art keywords
- oil
- pressure
- pressure pump
- switch valve
- pipeline
- 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.)
- Withdrawn
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B1/00—Control systems of elevators in general
- B66B1/02—Control systems without regulation, i.e. without retroactive action
- B66B1/04—Control systems without regulation, i.e. without retroactive action hydraulic
Landscapes
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Types And Forms Of Lifts (AREA)
- Elevator Control (AREA)
- Fluid-Pressure Circuits (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
The invention provides a kind of oil lifter, it comprises car, oil jack, oil pressure pump, drive the oil pressure pump motor, be arranged at the switch valve on the pipeline between oil jack and the oil pressure pump, be arranged on the by pass valve on the pipeline between switch valve and the oil pressure pump, oil groove and decline operating instruction relay, also comprise and be arranged at the pressure detector on the pipeline between switch valve and the oil pressure pump, and accident control setup, when detect by pressure detector the pressure on its pipeline of living in when setting value is following, thereby pressure detector makes the action of accident control setup make the electrical motor outage.The present invention has the accident of preventing that the effect of safety takes place, improves.
Description
The present invention relates to the direct motor drive oil pressure pump and control the oil lifter of its down maneuver.
Shown in Figure 3 is is similar to the example of the oil lifter of the routine of spy shown in opening on the clear 57-98477 communique.
Among the figure, (1) is the car that oil jack (2) is supported, (3) be the oil pressure pump that drives by electrical motor (4) and be arranged on the pipeline that is communicated with oil jack (2), (5) be arranged on switch valve on the pipeline between oil jack (2) and the oil pressure pump (3), (6) be arranged on by pass valve on the pipeline between switch valve (5) and the oil pressure pump (3), (7) are oil grooves.
Conventional oil lifter is made of aforesaid way.Under the situation that car (1) is risen, along with electrical motor (4) is energized, switch valve (5) is open, pressure oil from oil pressure pump (3) to oil jack (2) force feed and the running of electrical motor (4) changes the discharge flow of oil pressure pump (3) by the control of variable voltage variable frequency.Thereby make the car handling row that can slowly and successfully quicken, slow down.In addition, under the situation that car (1) descends, open switch valve (5) is with following described such pressure oil of discharging from oil jack (2) of controlling.That is, drive oil pressure pump (3) by electrical motor (4), simultaneously, the running of electrical motor (4) controlled discharge flow is changed, so that car turns round as slowly successfully quickening, slowing down.
In the oil lifter of as described above routine, it is contemplated that following situation can take place, decline at car (1) is in service, perhaps at car (1) when stopping, because certain fault is in oil pressure pump under the closed condition (3) at switch valve (5) and is discharged the direction driving towards the pressure oil of oil jack (2).Like this unusual in, the pipeline between switch valve (5) and the oil pressure pump (3) becomes negative pressure, and oil pressure pump (3) bonded assembly pipeline in (cavitation) phenomenon that cavitates.There are the following problems thus, promptly produce abnormal vibrations and damage machine or at oil pressure pump (3) thus etc. slip oil film partly go up to take place disconnects and cause burn scorification etc.
The present invention is exactly in order to solve such problem, and purpose is to obtain a kind of preventing to press the indirect fault that produces in the oil lifter of possible trouble because of pipe.
In the oil jack device relevant, on the pipeline between switch valve and the oil pressure pump, pressure detector is set, and the accident control setup of switching on by the action of this pressure detector is set with the present invention.
In the oil lifter relevant with the present invention, in case the pressure of the pipeline between switch valve and the oil pressure pump reaches setting value when following, the action by pressure detector makes the action of accident control setup, and makes the outage of oil pressure pump motor.
Fig. 1 and Fig. 2 are the scheme drawings of one embodiment of the present of invention.Among the figure, the mark identical with Fig. 3 represented identical part, (8) be arranged on pressure detector in the pipeline between switch valve (5) and the oil pressure pump (3), (8a) be its normal opened contact, (9) be the normal opened contact of decline operating instruction relay, (10) being pressure relay, (10a) is its normally closed contact, and (11) are the accident control setups based on pressure relay (10).
In by the top described oil lifter that constitutes like that, as send the decline operating instruction, contact (9) closure then, the loop by (+)-(9)-(4)-(one) makes electrical motor (4) energising.Also the loop by (+)-(9)-(5)-(one) makes switch valve (5) open simultaneously.Thus, the pressure oil of oil jack (2) is discharged, car (1) just descends.In the decline of such car (1), or at car (1) when stopping, made by the decline operating instruction under the situation of electrical motor (4) energising, following accident takes place sometimes, promptly switch valve (5) closes to be incorporated in because of certain fault and keeps that electrical motor (4) is rotated further under this state.When such accident took place, the pressure of pipeline can reduce, but in case reduce to setting value when following, then pressure detector (8) moves, contact, (8a) closure.Thus, the loop by (+)-(8a)-(10)-(one) makes pressure relay (10) energising, contact (10a) opening.Because the opening of contact (10a) makes electrical motor (4) outage, can prevent owing to pipeline become the abnormal vibrations that negative pressure generation cavitation causes, burn scorification of carriage etc. obstacle betide possible trouble, so can obtain safe oil lifter.
In addition, the embodiment of application drawing 1 and Fig. 2 forms that following described such to constitute also be possible.
That is to say, even it is low unusually that the pressure detector (8) of the output of the pressure by producing the pipeline between responding to switch valve (5) and the oil pressure pump (3) detects line pressure, and make electrical motor (4) outage by the accident control setup, also can play the effect same with the embodiment of Fig. 1 and Fig. 2.
The accident control setup that the present invention is provided with, as discussed above, detect after pressure reduces by the pressure detector between switch valve and the oil pressure pump, make the outage of oil pressure pump motor, its effect is to prevent that switch valve is in closure state when descending operation, makes the electrical motor energising, pipeline produces the generation of this obstacle of negative pressure, and improves safety.
The simple declaration of drawing
Fig. 1 is the scheme drawing of an embodiment of oil lifter of the present invention,
Fig. 2 is the main portion circuit diagram of the oil lifter of Fig. 1,
Fig. 3 is the scheme drawing of oil lifter that is equivalent to the routine of Fig. 1.
(1) ... car, (2) ... oil jack, (3) ... oil pressure pump, (4) ... electrical motor, (5) ... switch valve, (8) ... pressure detector, (11) ... the accident control setup.
Moreover, represent by same mark with a part among the figure.
Claims (1)
1, a kind of oil lifter, by making the pressure oil that switch valve is open, discharge oil jack, car is descended, and through the direct motor drive oil pressure pump, control is from the flow of the pressure oil of above-mentioned switch valve discharge, to control the down maneuver of above-mentioned car, it is characterized in that having the pressure detector that detects the line pressure between above-mentioned switch valve and the oil pressure pump, and make the accident control setup of above-mentioned line pressure above-mentioned electrical motor outage when setting value is following by this pressure detector.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP116704/89 | 1989-05-10 | ||
| JP1116704A JPH0712897B2 (en) | 1989-05-10 | 1989-05-10 | Hydraulic elevator |
| JP89-116704 | 1989-05-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1047261A true CN1047261A (en) | 1990-11-28 |
| CN1014972B CN1014972B (en) | 1991-12-04 |
Family
ID=14693767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN90102689A Expired CN1014972B (en) | 1989-05-10 | 1990-05-05 | Oil hydraulic lift |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPH0712897B2 (en) |
| KR (1) | KR920007394B1 (en) |
| CN (1) | CN1014972B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100450909C (en) * | 2005-04-26 | 2009-01-14 | 王秋楠 | Safety return circuit device of oil-pressurized elevator |
| CN104401849A (en) * | 2014-09-18 | 2015-03-11 | 韦伯电梯有限公司 | Hydraulic elevator system with ultra-low noise and stable operation |
-
1989
- 1989-05-10 JP JP1116704A patent/JPH0712897B2/en not_active Expired - Lifetime
- 1989-12-16 KR KR1019890018736A patent/KR920007394B1/en not_active IP Right Cessation
-
1990
- 1990-05-05 CN CN90102689A patent/CN1014972B/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100450909C (en) * | 2005-04-26 | 2009-01-14 | 王秋楠 | Safety return circuit device of oil-pressurized elevator |
| CN104401849A (en) * | 2014-09-18 | 2015-03-11 | 韦伯电梯有限公司 | Hydraulic elevator system with ultra-low noise and stable operation |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02295872A (en) | 1990-12-06 |
| CN1014972B (en) | 1991-12-04 |
| KR900017892A (en) | 1990-12-20 |
| KR920007394B1 (en) | 1992-08-31 |
| JPH0712897B2 (en) | 1995-02-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| OR01 | Other related matters | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |