CN201090557Y - Crawler loader operating oil way no-voltage protection system - Google Patents
Crawler loader operating oil way no-voltage protection system Download PDFInfo
- Publication number
- CN201090557Y CN201090557Y CNU2007201746630U CN200720174663U CN201090557Y CN 201090557 Y CN201090557 Y CN 201090557Y CN U2007201746630 U CNU2007201746630 U CN U2007201746630U CN 200720174663 U CN200720174663 U CN 200720174663U CN 201090557 Y CN201090557 Y CN 201090557Y
- Authority
- CN
- China
- Prior art keywords
- oil
- reversing valve
- electro
- hydraulic reversing
- relay
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Fluid-Pressure Circuits (AREA)
- Component Parts Of Construction Machinery (AREA)
- Operation Control Of Excavators (AREA)
Abstract
The utility model discloses a no-pressure protection system for the operating oil path of a tracked loader, comprising an oil tank, and an oil filter, an oil pump and a tracked loader operating oil path which are connected in sequence with the oil tank. The utility model is characterized in that the protection system also comprises a pressure sensor and an electro-hydraulic reversing valve arranged in a main oil path, and a main control circuit electrically connected with the pressure sensor and the electro-hydraulic reversing valve; wherein the input end of the electro-hydraulic reversing valve is connected with the output end of the oil pump; one output end of the electro-hydraulic reversing valve is connected with the operating main path and the other output end is directly connected with the oil tank. When the main oil path is out of pressure, the no-pressure analog signal is transformed by the pressure sensor into a digital signal to be input into the main control circuit and then to drive the reversing valve to cut off the main oil path and communicate the oil path of the oil tank, the hydraulic oil is forced to return through the reversing valve back to the oil tank; thus oil leak is prevented under the condition of no flameout, and the operator can drive the loader to go away from the high temperature operating environment to do maintenance.
Description
Technical field
The utility model relates to a kind of oil circuit protective system, particularly a kind of track loader working oil path o-volt protection system.
Background technique
The walking of track loader, turn to, hoisting system is all by hydraulic system transmission work, and the hydraulic oil pipe in the hoisting system is because pressure height, the flow of its stand under load are big, the time regular meeting phenomenon that explosion or pipe joint come off takes place.In steel industry, because track loader is handled application in this hot environment at carbon steel hot application slag, it is very dangerous that the existence of this problem just seems.Carrying out when the hot application slag is handled is to come carbon steel vessel slag to high temperature (800 ℃～1000 ℃) to carry out hot application with track loader to turn over the shovel cooling processing, in case hydraulic oil pipe explosion or pipe joint take place to come off, promptly can cause the hydraulic oil splash, all the baked wheaten cake accident may take place at any time after touching red slag.And go out for fear of more oil leakage after the leakage of oil, the operator has to immediately flame-out, causes loader can't withdraw from the environment of high temperature the very first time, this situation serious threat operator's personal safety.
Summary of the invention
Unaffected in order to realize automatic cut-out and the walking steering system of track loader when the working oil path decompression; both avoided baked wheaten cake equipment; the operator also can in time operate machine and withdraw from the environment of high temperature; reach the purpose that eliminates safe hidden trouble fully; the utility model provides a kind of track loader working oil path o-volt protection system; the technological scheme that it adopts is: a kind of track loader working oil path o-volt protection system; comprise fuel tank; the oil purifier that is connected with fuel tank successively; oil pump and track loader work working connection; it is characterized in that: also comprise the pressure transducer and the electro-hydraulic reversing valve that are arranged in the working connection; and the main control circuit that is electrically connected with pressure transducer and electro-hydraulic reversing valve; wherein: the input end of electro-hydraulic reversing valve is connected with the output terminal of oil pump; an output terminal of electro-hydraulic reversing valve is connected with the work working connection, and another output terminal directly is connected with fuel tank.
Described main control circuit is that pressure transducer, relay K M3, electro-hydraulic reversing valve are connected successively.Also be in series with tutorial light and buzzer in parallel between described relay K M3 and the electro-hydraulic reversing valve.
Also be in series with KM1 before the described relay K M3, electro-hydraulic reversing valve is failure to actuate during with assurance working connection proper functioning, also has and pressure transducer, relay K M1, KM3 relay K M2 in parallel locking ground connection.
The beneficial effects of the utility model are: track loader is after installing this working oil path o-volt protection system additional; when swing arm oil circuit or scraper bowl oil circuit leakage of oil decompression; pressure transducer is a digital signal input main control circuit with the analog signal conversion of decompression; and then drive selector valve work; cut-out work working connection; connect the fuel tank oil circuit; make hydraulic oil return fuel tank again through selector valve from fuel tank; under not flame-out situation, prevented the generation of leakage of oil; and the operator can drive machinery and withdraw from the place under repair of high-temperature operation environment immediately, has ensured the person and device security.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is a circuit connection diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further:
With reference to Fig. 1, Fig. 2, a kind of track loader working oil path of the utility model o-volt protection system, comprise fuel tank 1, the oil purifier 2 that is connected with fuel tank 1, oil pump 3 and track loader work working connection 6 successively, be arranged on pressure transducer 5 and electro-hydraulic reversing valve 4 in the working connection 6, and the main control circuit 7 that is electrically connected with pressure transducer 5 and electro-hydraulic reversing valve 4; Wherein: the input end of electro-hydraulic reversing valve 4 is connected with the output terminal of oil pump 3, and an output terminal of electro-hydraulic reversing valve 4 is connected with work working connection 6, and another output terminal directly is connected with fuel tank 1.
Described main control circuit 7 is that pressure transducer 5, relay K M3, electro-hydraulic reversing valve 4 are connected successively; Also be in series with the tutorial light ZD5 and the buzzer FM that are in parallel between described relay K M3 and the electro-hydraulic reversing valve 4.Also be in series with relay K M1 before the relay K M3, electro-hydraulic reversing valve 4 is failure to actuate during with assurance working connection 6 proper functioning, also has and pressure transducer 5, relay K M1, KM3 relay K M2 in parallel locking ground connection.
During the loader proper functioning in the working oil path pressure range of hydraulic oil be 2.6～15MPa, the output signal when operating range of pressure transducer is 2.45～30MPa.Pressure transducer 5 is sensed working oil path pressure＞2.45MPa (between 2.6～15MPa) during the work of loader proper functioning, as shown in Figure 2, and pressure transducer 5 internal relay work, normally opened contact closure, output signal.This moment relay K M1 coil get electric, the contact K1 closure of relay K M1; D4 conducting, electric current be through shunting the part KM3 coil of flowing through, the part relay K M2 coil of flowing through; Then the contact K3 of relay K M3 disconnects, and buzzer FM, red LED lamp ZD5 and electro-hydraulic reversing valve 4 all must not; The contact K2 closure of relay K M2, relay K M2 and ground wire form the loop, all the time.At this moment, as shown in Figure 1, electro-hydraulic reversing valve 4 is connected fuel tank 1 and working oil path, the closed fuel tank loop, and operator can normal operation.
(working oil path pressure＜2.45MPa), as shown in Figure 2, pressure transducer 5 internal relay switches disconnect, and the switching value signal stops output when certain part oil pipe explosion or pipe joint come off in the work working connection 6.Relay K M1 coil losing electricity, the contact K1 of relay K M1 disconnects; Relay K M3 coil losing electricity, the contact K3 closure of relay K M3.Since relay K M2 all the time electric, the contact is closed all the time, electric current is through shunting, a part flow through KM2 coil and ground wire formation loop, the flow through make contact K3 of relay K M3 of a part arrives red LED lamp ZD5, buzzer FM and electro-hydraulic reversing valve 4.Buzzer FM sends chimes of doom, and red LED lamp ZD5 is bright, electro-hydraulic reversing valve 4 actions simultaneously, as shown in Figure 1, cut off work working connection 6, connect fuel tank 1 loop, hydraulic oil flow oil sump tank 1 can not continue leakage of oil, and operator can be sailed out of vehicle the high-temperature operation place immediately.
Track loader is after installing this working oil path o-volt protection system additional; when swing arm oil circuit or scraper bowl oil circuit leakage of oil decompression; pressure transducer 5 is a digital signal input main control circuit 7 with the analog signal conversion of decompression; and then drive electro-hydraulic reversing valve 4 work; cut-out work working connection 6; connect fuel tank oil circuit 8; make hydraulic oil return fuel tank 1 again through electro-hydraulic reversing valve 4 from fuel tank 1; under not flame-out situation, prevented the generation of leakage of oil; and the operator can drive machinery and withdraw from the place under repair of high-temperature operation environment immediately, has ensured the person and device security.
Claims (3)
1. track loader working oil path o-volt protection system; comprise fuel tank; the oil purifier that is connected with fuel tank, oil pump and track loader work working connection successively; it is characterized in that: also comprise the pressure transducer and the electro-hydraulic reversing valve that are arranged in the working connection; and the main control circuit that is electrically connected with pressure transducer and electro-hydraulic reversing valve; wherein: the input end of electro-hydraulic reversing valve is connected with the output terminal of oil pump; an output terminal of electro-hydraulic reversing valve is connected with the work working connection, and another output terminal directly is connected with fuel tank.
2. track loader working oil path o-volt protection as claimed in claim 1 system; it is characterized in that described main control circuit is that pressure transducer, relay K M3, electro-hydraulic reversing valve are connected successively, also is in series with the tutorial light and the buzzer that are in parallel between described relay K M3 and the electro-hydraulic reversing valve.
3. track loader working oil path o-volt protection as claimed in claim 2 system; it is characterized in that also being in series with relay K M1 before the described relay K M3; electro-hydraulic reversing valve is failure to actuate during with assurance working connection proper functioning; also has and pressure transducer, relay K M1, KM3 relay K M2 in parallel locking ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201746630U CN201090557Y (en) | 2007-06-06 | 2007-08-21 | Crawler loader operating oil way no-voltage protection system |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200720070701 | 2007-06-06 | ||
| CN200720070701.8 | 2007-06-06 | ||
| CNU2007201746630U CN201090557Y (en) | 2007-06-06 | 2007-08-21 | Crawler loader operating oil way no-voltage protection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201090557Y true CN201090557Y (en) | 2008-07-23 |
Family
ID=39862318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201746630U Expired - Fee Related CN201090557Y (en) | 2007-06-06 | 2007-08-21 | Crawler loader operating oil way no-voltage protection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201090557Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101936319A (en) * | 2010-08-26 | 2011-01-05 | 无锡市东舟船舶附件有限公司 | Main oil-passage no-pressure warning device of hydraulic system |
| CN102407065A (en) * | 2010-09-21 | 2012-04-11 | 中国石油化工集团公司 | Thermal regeneration-free air drying system |
-
2007
- 2007-08-21 CN CNU2007201746630U patent/CN201090557Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101936319A (en) * | 2010-08-26 | 2011-01-05 | 无锡市东舟船舶附件有限公司 | Main oil-passage no-pressure warning device of hydraulic system |
| CN101936319B (en) * | 2010-08-26 | 2013-01-30 | 无锡市东舟船舶附件有限公司 | Main oil-passage no-pressure warning device of hydraulic system |
| CN102407065A (en) * | 2010-09-21 | 2012-04-11 | 中国石油化工集团公司 | Thermal regeneration-free air drying system |
| CN102407065B (en) * | 2010-09-21 | 2013-10-23 | 中国石油化工集团公司 | Thermal regeneration-free air drying system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103534420A (en) | Hybrid excavator including a fast-stopping apparatus for a hybrid actuator | |
| CN204985137U (en) | Converter activity petticoat pipe lift hydraulic control system | |
| CN201090557Y (en) | Crawler loader operating oil way no-voltage protection system | |
| CN102352734A (en) | Ground blowout preventer control device with function of preventing lifting breakage of drill column | |
| CN112196783B (en) | Automatic control starting method for pump set of long-distance large-pipe-diameter water conveying and transferring pump station | |
| CN201258779Y (en) | GK1C type diesel locomotive water temperature control device | |
| CN103148259A (en) | Furnace top bleeding valve with safety protection function | |
| CN203756630U (en) | Novel sliding nozzle hydraulic control system | |
| CN212031995U (en) | Flash evaporation gas recovery integrated device | |
| CN102536350B (en) | Safety control method at urgent fault time of power supply of TRT (Top gas pressure Recovery Turbine) set automatic control system | |
| CN112031967A (en) | Fuel supply equipment and fuel supply method for offshore platform | |
| CN204079417U (en) | For the operation interlock control of aerial platform | |
| CN201660375U (en) | Crane-starting interlocking control device | |
| CN201461625U (en) | Blast furnace top hydraulic station control system | |
| CN205153022U (en) | Hydraulic shovel miscellaneous function control system | |
| CN201746567U (en) | Hydraulic quick-acting switching-off control device for gas switching-off valve used for blast stove | |
| CN104150362A (en) | Operation dynamic monitoring system and operation dynamic monitoring method for mechanical double-rope grab | |
| CN209523931U (en) | A kind of hydraulic oil supply cylinder automatic switchover hydraulic system of ladle slide gate in billet | |
| CN205677912U (en) | The online three grades of oil filters of press | |
| CN102183971B (en) | Automatic water-replenishing device for gas producer | |
| CN202381023U (en) | Ground preventer control device with drill stem lifted breaking resistant function | |
| CN207111184U (en) | Steam Turbine speed closes oily interlock control system | |
| CN202377073U (en) | Safety control mechanism in lubricating and cooling system of coal pulverizer | |
| CN204374721U (en) | Computer monitoring for strobe system | |
| CN217354958U (en) | Blast furnace top hydraulic control valve control device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080723 Termination date: 20100821 |