CN214465201U - Scraper closed-center type quantitative hydraulic system and scraper - Google Patents
Scraper closed-center type quantitative hydraulic system and scraper Download PDFInfo
- Publication number
- CN214465201U CN214465201U CN202120467850.8U CN202120467850U CN214465201U CN 214465201 U CN214465201 U CN 214465201U CN 202120467850 U CN202120467850 U CN 202120467850U CN 214465201 U CN214465201 U CN 214465201U
- Authority
- CN
- China
- Prior art keywords
- valve
- hydraulic
- oil cylinder
- scraper
- electromagnetic valve
- 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.)
- Active
Links
Images
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
The utility model discloses a scraper closed center formula ration hydraulic system, including hydraulic tank, quantitative hydraulic pump, multiple unit valve, tipping bucket hydro-cylinder, lift hydro-cylinder and lift hydro-cylinder, be provided with relief pressure valve, switching-over valve, solenoid valve, pressure compensator, shuttle valve and shuttle valve in the multiple unit valve; the electromagnetic valve is electrified, hydraulic oil pushes the reversing valve to reverse after passing through the pressure reducing valve and the electromagnetic valve, and the hydraulic oil flows into the tipping bucket oil cylinder through the pressure compensator and the reversing valve; the electromagnetic valve is electrified, hydraulic oil pushes the reversing valve to reverse after passing through the pressure reducing valve and the electromagnetic valve, and the hydraulic oil flows into the lifting oil cylinder and the lifting oil cylinder through the pressure compensator and the reversing valve; the electromagnetic valve and the electromagnetic valve are simultaneously electrified, the pressure compensator and the pressure compensator respectively monitor the pressure in the tipping bucket oil cylinder and the lifting oil cylinder through the shuttle valve and the shuttle valve, and the pressure compensator compensates the pressure difference between the tipping bucket oil cylinder and the lifting oil cylinder, so that the compound action is realized.
Description
Technical Field
The utility model belongs to the mining machinery field especially relates to the hydraulic system of scraper.
Background
In the mining machinery industry, the height of the whole scraper is limited by a roadway due to the narrow roadway under a mine, so that the scraper cannot be large, and meanwhile, materials need to be carried out as soon as possible after the materials are blasted under the mine, so that the scraper is high in efficiency. For the scraper, the work efficiency of the scraper can be better improved by realizing composite action, and the composite action refers to the action of the lifting oil cylinder and the tipping bucket oil cylinder of the scraper simultaneously.
In the prior art, most engineering machinery vehicles such as a scraper, a loader and the like of material handling machinery are open-center type quantitative hydraulic systems, and have great limitation in the working condition of realizing the compound action of a movable arm oil cylinder and a lifting oil cylinder. In addition, the spacial layout of the scraper is narrow, and the pilot control and the external solenoid valve control have larger space limitation.
SUMMERY OF THE UTILITY MODEL
The utility model provides a scraper closes central formula ration hydraulic system can realize the compound action of tipping bucket hydro-cylinder and lift cylinder, satisfies the scraper that has under the compound operating mode and uses, has improved the work efficiency of scraper.
The utility model discloses a scraper closes central formula ration hydraulic system, including hydraulic tank, quantitative hydraulic pump, multiple unit valve, tipping bucket hydro-cylinder, lift hydro-cylinder and lift hydro-cylinder, the multiple unit valve with tipping bucket hydro-cylinder, lift hydro-cylinder, oil feed flow path and return oil flow path are connected, be provided with relief pressure valve, switching-over valve, solenoid valve, pressure compensator, shuttle valve and shuttle valve in the multiple unit valve; the electromagnetic valve is electrified, hydraulic oil pushes the reversing valve to reverse after passing through the pressure reducing valve and the electromagnetic valve, and the hydraulic oil flows into the tipping bucket oil cylinder through the pressure compensator and the reversing valve; the electromagnetic valve is electrified, hydraulic oil pushes the reversing valve to reverse after passing through the pressure reducing valve and the electromagnetic valve, and the hydraulic oil flows into the lifting oil cylinder and the lifting oil cylinder through the pressure compensator and the reversing valve;
the electromagnetic valve and the electromagnetic valve are simultaneously electrified, the pressure compensator and the pressure compensator respectively monitor the pressure in the tipping bucket oil cylinder and the lifting oil cylinder through the shuttle valve and the shuttle valve, and the pressure compensator compensates the pressure difference between the tipping bucket oil cylinder and the lifting oil cylinder, so that the compound action is realized.
Preferably, a flow control valve is arranged in the multi-way valve, and when the hydraulic oil cylinder does not act, the flow control valve is positioned at an upper position and overflows the hydraulic oil back to the hydraulic oil tank; when the hydraulic oil cylinder acts, the pressure introduced into the load end acts on the lower end of the flow control valve and enables the flow control valve to be always in a stop position together with the spring force, so that the hydraulic oil can act on the hydraulic oil cylinder, and the maximum load pressure is monitored through the shuttle valve and the shuttle valve, so that the flow control valve cannot overflow.
Preferably, a pilot oil filter is arranged in the multi-way valve and used for filtering hydraulic oil flowing into the electromagnetic valve and the electromagnetic valve.
Preferably, the multi-way valve is also internally provided with an electromagnetic valve and an electromagnetic valve, the electromagnetic valve is connected with the electromagnetic valve in parallel, and the electromagnetic valve is connected with the electromagnetic valve in parallel.
Preferably, an oil return filter is provided in the oil return flow path.
Preferably, the flow control valve is a three-way flow control valve, and the pressure reducing valve is a two-position three-way pressure reducing valve.
Preferably, the hydraulic steering system further comprises a steering valve, the quantitative hydraulic pump is a working pump and a steering pump which are connected in series, hydraulic oil flows into the multi-way valve or the steering valve through the quantitative hydraulic pump, and the hydraulic oil flowing through the steering valve enters the steering system.
The utility model also provides a carry scraper, include carry scraper closed center formula ration hydraulic system.
Compared with the prior art, the utility model adopts integrated electro-hydraulic proportional control, can realize the compound action of the lifting oil cylinder and the tipping bucket oil cylinder of the scraper, meets the use requirement of the scraper under the compound working condition, and improves the working efficiency of the scraper; furthermore, the utility model discloses reduced the inside pipeline overall arrangement in scraper space under the prerequisite of realizing compound action, the easy to maintain maintenance has reduced the complete machine cost of scraper.
Drawings
Fig. 1 is a schematic diagram of the hydraulic system of the present invention.
Reference numerals: 1. a hydraulic oil tank; 2. a quantitative hydraulic pump; 3. a steering valve; 4. a multi-way valve; 5. a flow control valve; 6. a pressure reducing valve; 7. a first direction changing valve; 8. a first solenoid valve; 9. a second solenoid valve; 10. a third electromagnetic valve; 11. A fourth solenoid valve; 12. a tipping oil cylinder; 13. a first lift cylinder; 14. a second lift cylinder; 15. a second directional control valve; 16. an oil return filter; 17. a pilot oil filter; 18. a first pressure compensator; 19. a second pressure compensator; 20. a first shuttle valve; 21. a second shuttle valve.
Detailed Description
The invention is further described with reference to the following examples and the accompanying drawings.
As shown in fig. 1, the utility model discloses a hydraulic system includes hydraulic tank 1, quantitative hydraulic pump 2, steering valve 3, multiple unit valve 4, tipping bucket hydro-cylinder 12, first lift hydro-cylinder 13, second lift hydro-cylinder 14 and return oil filter 16, the integration has flow control valve 5 in the multiple unit valve 4, relief pressure valve 6, first switching-over valve 7, second switching-over valve 15, first solenoid valve 8, second solenoid valve 9, third solenoid valve 10, fourth solenoid valve 11, pilot oil filter 17, first pressure compensator 18, second pressure compensator 19, first shuttle valve 20 and second shuttle valve 21, wherein, flow control valve 5 is the tee bend flow control valve, and relief pressure valve 6 is the two-position tee bend relief pressure valve. The utility model discloses four solenoid valves of integration, flow control valve 5 and relief pressure valve 6 etc. in multi-way valve 4 have reduced the space that the pipeline took in the scraper.
The hydraulic oil tank 1 is a container for storing oil required by the operation of a hydraulic system. The quantitative hydraulic pump 2 is formed by connecting a working pump and a steering pump in series and is driven by a gearbox to provide hydraulic energy for a quantitative hydraulic system; the hydraulic oil provided by the quantitative hydraulic pump 2 flows through the multi-way valve 4, and the flow direction of the hydraulic oil is controlled by the multi-way valve 4, so that the hydraulic oil flows to the hydraulic oil cylinder to act or flows back to the hydraulic oil tank 1. A hydraulic oil source is provided for the electromagnetic valve from an oil inlet of the multi-way valve 4 by controlling the reducing valve 6, and then the valve core of the reversing valve is pushed by hydraulic oil to move, so that the hydraulic oil flows into the hydraulic oil cylinder through the reversing valve, and the movement of the hydraulic oil cylinder is realized.
When the hydraulic oil cylinder is controlled not to act, the flow control valve 5 is in an upper position to overflow the hydraulic oil back to the hydraulic oil tank 1, and when the hydraulic oil cylinder is controlled to act, the pressure introduced into the load end acts on the lower end of the flow control valve 5 and enables the flow control valve 5 to be always in a stop position together with the spring force, so that the hydraulic oil can act on the hydraulic oil cylinder. The maximum load pressure is monitored by the first and second shuttle valves 20, 21 to ensure that the flow control valve 5 does not spill during operation of the hydraulic ram.
The lifting and descending of the hydraulic oil cylinder are controlled by a first electromagnetic valve 8, a second electromagnetic valve 9, a third electromagnetic valve 10 and a fourth electromagnetic valve 11 which are integrated in the multi-way valve 4, the bucket is collected and the bucket is moved, and because the four electromagnetic valves control the oil inlets of the two reversing valves, the parallel connection mode is adopted, the compound movement of the lifting oil cylinder and the bucket oil cylinder can be realized by controlling the electrification of the four electromagnetic valves. Finally, the oil return filter 16 filters the hydraulic oil flowing out of the multi-way valve 4 and then returns the hydraulic oil to the hydraulic oil tank 1, and the hydraulic oil can be recycled.
The utility model discloses a hydraulic system during operation, hydraulic oil are by quantitative hydraulic pump 2 from hydraulic tank 1 in the suction, flow into diverter valve 3 and multiple unit valve 4, and the hydraulic oil that flows into diverter valve 3 directly flows into multiple unit valve 4 when not turning to the action, realizes the double pump confluence.
When an operator operates a handle to realize the bucket collecting and tipping actions of the tipping bucket oil cylinder 12, the first electromagnetic valve 8 or the second electromagnetic valve 9 is electrified, hydraulic oil passes through the pressure reducing valve 6 and the pilot oil filter 17 and then passes through the electrified first electromagnetic valve 8 or 9, so that the first reversing valve 7 is pushed to reverse, the hydraulic oil flows into the tipping bucket oil cylinder 12 through the first pressure compensator 18 and the first reversing valve 7, and the bucket collecting and tipping actions of the tipping bucket oil cylinder 12 are realized.
When an operator operates a handle to realize the ascending and descending actions of the first lifting oil cylinder 13 and the second lifting oil cylinder 14, the third electromagnetic valve 10 or the fourth electromagnetic valve 11 is electrified, hydraulic oil passes through the pressure reducing valve 6 and the pilot oil filter 17 and then passes through the electrified third electromagnetic valve 10 or the electrified fourth electromagnetic valve 11, so that the second reversing valve 15 is pushed to reverse, and the hydraulic oil flows into the first lifting oil cylinder 13 and the second lifting oil cylinder 14 through the second pressure compensator 19 and the second reversing valve 15, so that the ascending and descending actions of the lifting oil cylinders are realized.
The first change valve 7 and the second change valve 15 are respectively provided with a first pressure compensator 18 and a second pressure compensator 19, when the handle is operated simultaneously to electrify the first solenoid valve 8 (or the second solenoid valve 9) and the third solenoid valve 10 (or the fourth solenoid valve 11), a compound action (for example, a bucket collecting and tipping operation when ascending, and a bucket collecting and tipping operation when descending) occurs, at this time, because the pressures in the two actuators (the tipping bucket cylinder 12, the first lifting cylinder 13 and the second lifting cylinder 14) are different, hydraulic oil preferentially flows to the actuator with low pressure, so that the compound action can not be realized, at this time, the first pressure compensator 18 and the second pressure compensator 19 are arranged to monitor the maximum pressures of the two actuators through the first shuttle valve 20 and the second shuttle valve 21 respectively, and then the pressure compensator compensates the pressure difference between the two actuators in the change valve with low pressure, when the compound action is performed, the action is completely dependent on the opening degree of the first reversing valve 7 and the second reversing valve 15, so that the compound action is realized.
The above-described embodiments are only preferred embodiments of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several modifications and equivalent substitutions can be made, and these modifications and equivalent substitutions do not depart from the technical scope of the present invention.
Claims (8)
1. The utility model provides a scraper closes central formula ration hydraulic system which characterized in that: the hydraulic control system comprises a hydraulic oil tank (1), a quantitative hydraulic pump (2), a multi-way valve (4), a tipping bucket oil cylinder (12), a first lifting oil cylinder (13) and a second lifting oil cylinder (14), wherein the multi-way valve (4) is connected with the tipping bucket oil cylinder (12), the first lifting oil cylinder (13), the second lifting oil cylinder (14), an oil inlet flow path and an oil return flow path, and a pressure reducing valve (6), a first reversing valve (7), a second reversing valve (15), a first electromagnetic valve (8), a third electromagnetic valve (10), a first pressure compensator (18), a second pressure compensator (19), a first shuttle valve (20) and a second shuttle valve (21) are arranged in the multi-way valve (4);
the first electromagnetic valve (8) is electrified, hydraulic oil pushes the first reversing valve (7) to reverse after passing through the pressure reducing valve (6) and the first electromagnetic valve (8), and the hydraulic oil flows into the skip bucket oil cylinder (12) through the first pressure compensator (18) and the first reversing valve (7);
the third electromagnetic valve (10) is electrified, hydraulic oil pushes the second reversing valve (15) to reverse after passing through the pressure reducing valve (6) and the third electromagnetic valve (10), and the hydraulic oil flows into the first lifting oil cylinder (13) and the second lifting oil cylinder (14) through the second pressure compensator (19) and the second reversing valve (15);
the first electromagnetic valve (8) and the third electromagnetic valve (10) are simultaneously electrified, the first pressure compensator (18) and the second pressure compensator (19) respectively monitor the pressure in the tipping bucket oil cylinder and the lifting oil cylinder through the first shuttle valve (20) and the second shuttle valve (21), and the pressure compensator compensates the pressure difference between the tipping bucket oil cylinder and the lifting oil cylinder, so that the compound action is realized.
2. The closed-center, fixed-quantity hydraulic system of a scraper in accordance with claim 1, characterized in that: a flow control valve (5) is arranged in the multi-way valve (4), and when the hydraulic oil cylinder does not act, the flow control valve (5) is positioned at an upper position to overflow the hydraulic oil back to the hydraulic oil tank (1); when the hydraulic oil cylinder acts, the pressure introduced into the load end acts on the lower end of the flow control valve (5) and enables the flow control valve (5) to be always in a stop position together with the spring force, so that the hydraulic oil can act on the hydraulic oil cylinder, and the maximum load pressure is monitored through the first shuttle valve (20) and the second shuttle valve (21), so that the flow control valve (5) cannot overflow.
3. The closed-center, fixed-quantity hydraulic system of a scraper in claim 2, characterized in that: and a pilot oil filter (17) is arranged in the multi-way valve (4), and the pilot oil filter (17) is used for filtering the hydraulic oil flowing into the first electromagnetic valve (8) and the third electromagnetic valve (10).
4. The closed-center, fixed-quantity hydraulic system of a scraper in claim 3, characterized in that: and a second electromagnetic valve (9) and a fourth electromagnetic valve (11) are further arranged in the multi-way valve (4), the second electromagnetic valve (9) is connected with the first electromagnetic valve (8) in parallel, and the fourth electromagnetic valve (11) is connected with the third electromagnetic valve (10) in parallel.
5. The closed-center fixed-quantity hydraulic system of a scraper in claim 4, characterized in that: an oil return filter (16) is arranged on the oil return flow path.
6. The closed-center fixed-quantity hydraulic system of a scraper in claim 5, characterized in that: the flow control valve (5) is a three-way flow control valve, and the reducing valve (6) is a two-position three-way reducing valve.
7. The closed-center, fixed-quantity hydraulic system of a scraper according to any one of claims 1-6, characterized in that: the hydraulic steering system is characterized by further comprising a steering valve (3), the quantitative hydraulic pump (2) is a working pump and a steering pump which are connected in series, hydraulic oil flows into the multi-way valve (4) or the steering valve (3) through the quantitative hydraulic pump (2), and the hydraulic oil flowing through the steering valve (3) enters the steering system.
8. A scraper, characterized in that: comprising a closed-center, fixed-displacement hydraulic system of a scraper according to any of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120467850.8U CN214465201U (en) | 2021-03-03 | 2021-03-03 | Scraper closed-center type quantitative hydraulic system and scraper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120467850.8U CN214465201U (en) | 2021-03-03 | 2021-03-03 | Scraper closed-center type quantitative hydraulic system and scraper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214465201U true CN214465201U (en) | 2021-10-22 |
Family
ID=78152746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120467850.8U Active CN214465201U (en) | 2021-03-03 | 2021-03-03 | Scraper closed-center type quantitative hydraulic system and scraper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214465201U (en) |
-
2021
- 2021-03-03 CN CN202120467850.8U patent/CN214465201U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2589823B1 (en) | Control circuit for energy regeneration and working machine | |
| CN104011406B (en) | Hydraulic system | |
| CN104246237B (en) | The fluid pressure drive device of engineering machinery | |
| US9080310B2 (en) | Closed-loop hydraulic system having regeneration configuration | |
| CN203892301U (en) | Meterless hydraulic system having multi-circuit recuperation | |
| US9151018B2 (en) | Closed-loop hydraulic system having energy recovery | |
| JP5985276B2 (en) | Hydraulic circuit of construction machine and its control device | |
| CN104520594B (en) | There is the system without metering hydraulic of power modulation | |
| CN203926235U (en) | Have many actuators loop without throttling hydraulic system | |
| DE112013002784T5 (en) | Electrohydraulic system for recovery and reuse of potential energy | |
| KR102510852B1 (en) | Hydraulic system and hydraulic control method for construction machine | |
| CN104011402A (en) | Hydraulic system | |
| US20130098011A1 (en) | Hydraulic system having multiple closed-loop circuits | |
| DE112012005272T5 (en) | Hydraulic system with energy recovery | |
| CN107208675A (en) | The hydraulic oil energy regenerating device of Work machine | |
| DE112013004234T5 (en) | Hydraulic control system | |
| US20100122528A1 (en) | Hydraulic system having regeneration and supplemental flow | |
| CN214465201U (en) | Scraper closed-center type quantitative hydraulic system and scraper | |
| CN102597538A (en) | Control arrangement | |
| US20140033698A1 (en) | Meterless hydraulic system having force modulation | |
| WO2013059110A2 (en) | Meterless hydraulic system having sharing and combining functionality | |
| CN104895138A (en) | Oil pressure driving system of building machinery | |
| CN110578726B (en) | Quantitative system variable hydraulic system | |
| CN109914519B (en) | Gravitational potential energy recycling and reusing energy-saving device based on four-port hydraulic transformer | |
| CN112762032B (en) | Telescopic hydraulic system and operating machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |