CN202073018U - Hydraulic control system for flotation of rear-material-conveying milling machine scraper plate - Google Patents
Hydraulic control system for flotation of rear-material-conveying milling machine scraper plate Download PDFInfo
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- CN202073018U CN202073018U CN 201120150996 CN201120150996U CN202073018U CN 202073018 U CN202073018 U CN 202073018U CN 201120150996 CN201120150996 CN 201120150996 CN 201120150996 U CN201120150996 U CN 201120150996U CN 202073018 U CN202073018 U CN 202073018U
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- electromagnetic valve
- scraper plate
- valve
- hydraulic control
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Abstract
A hydraulic control system for the flotation of a rear-material-conveying milling machine scraper plate belongs to a hydraulic control system of a milling machine scraper plate. A flotation control system is connected with one end of a scraper plate oil cylinder and a port 2 of a two-position three-way electromagnetic valve, a port 3 of the two-position three-way electromagnetic valve is connected with a port 3 of a three-position four-way electromagnetic valve by a hydraulic control check valve, and the other end of the scraper plate oil cylinder is connected with a port 4 of the three-position four-way electromagnetic valve; a port 1 of the three-position four-way electromagnetic valve is connected with a port 1 of a safety unloading electromagnetic valve and enters an oil tank through a pipeline, a port 2 of the three-position four-way electromagnetic valve is connected with a port 2 of the safety unloading electromagnetic valve and the connected with one end of a gear pump, and the other end of the gear pump enters the oil tank by a pipeline; one end of an adjustable decompression overflowing valve is connected with the port 1 of the two-position three-way electromagnetic valve, and the other end of the adjustable decompression overflowing valve is connected with an oil source of an oil supplying pump of a travelling pump. The hydraulic control system for the flotation of the rear-material-conveying milling machine scraper plate has the advantages of reducing the press on the ground caused by the scraper plate, improving the construction quality, realizing the functions of floating, locking and lifting of the milling machine scraper plate.
Description
Technical field
The utility model relates to a kind of milling machine scraper plate hydraulic control system, the unsteady hydraulic control system of particularly a kind of back defeated material milling machine scraper plate.
Background technology
Pavement milling machine is the special mechanical equipment of highway and urban road maintenance work, the excavation that is mainly used in asphalt concrete pavements such as highway, airport, harbour, parking lot is overhauled, the removing of pavement diseases such as asphalt pavement rut, be full of cracks, carbuncle bag, pavement markers, the plucking of cement pavement and surface layer faulting of slab ends mill the equality operation; Small-sized milling machine also can be used for excavating the layout of hole groove, drain and indoor and outdoor cable etc.The most middle-size and small-size milling machine in market all is furnished with back conveyer now.Because the back conveyer is heavier and be installed on the scraper plate, and the contact area on scraper plate and ground is less, therefore the pressure to ground is bigger on the scraper plate unit area, when working, softer flexible pavement often the bottom is not swept on the road surface of milling, cause the surface evenness after the milling bad easily, influence construction quality.
The utility model content
The purpose of this utility model is to provide a kind of: the surface evenness after the milling is good, does not influence the unsteady hydraulic control system of back defeated material milling machine scraper plate of construction quality.
The purpose of this utility model is achieved in that this floating type controlled system comprises two-bit triplet electromagnetic valve, hydraulic control one-way valve, three position four-way electromagnetic valve, overflow valve, safe off-load electromagnetic valve, adjustable decompression overflow valve, gear pump, fuel tank, scraper plate oil cylinder and traveling pump slippage pump oil sources, 2 mouthfuls of one end of scraper plate oil cylinder and two-bit triplet electromagnetic valve are connected, 3 mouthfuls of the two-bit triplet electromagnetic valve are connected by hydraulic control one-way valve 3 mouthfuls with three position four-way electromagnetic valve, and 4 mouthfuls of the other end of scraper plate oil cylinder and three position four-way electromagnetic valve are connected; Go into fuel tank by pipeline after 1 mouthful of three position four-way electromagnetic valve with safe off-load electromagnetic valve 1 mouthful is connected, be connected with an end of gear pump after 2 mouthfuls of three position four-way electromagnetic valve with safe off-load electromagnetic valve 2 mouthfuls are connected, the other end of gear pump is gone into fuel tank by pipeline; 1 mouthful of one end of adjustable decompression overflow valve and two-bit triplet electromagnetic valve is connected, and the other end of adjustable decompression overflow valve is connected with traveling pump slippage pump oil sources.
Beneficial effect, owing to adopted such scheme, it utilizes milling machine traveling pump slippage pump oil compensation pressure and cooperates two-bit triplet control valve, hydraulic control one-way valve, three position four-way electromagnetic valve, reducing valve overflow to realize the control of floating.The additional fluid that the unsteady hydraulic control system of scraper plate is floated is taken from the traveling pump slippage pump, supply with the float function that the two-bit triplet electromagnetic valve is realized scraper plate by adjustable decompression overflow valve, the pressure of oil cylinder loculus when the traveling pump slippage pump is used for the balance scraper plate and floats by adjustable decompression overflow valve, repairing amount and spillway discharge are very little, do not influence the work of traveling pump main system.Adjustable decompression overflow valve, two-bit triplet electromagnetic valve cooperation three position four-way electromagnetic valve, hydraulic control one-way valve are realized floating, locking function, and can operate the lifting of scraper plate when unsteady and locked.
The additional fluid that the unsteady hydraulic control system of scraper plate is floated is taken from the traveling pump slippage pump, supply with the float function that the two-bit triplet electromagnetic valve is realized scraper plate by adjustable decompression overflow valve, the traveling pump slippage pump only is used for the oil pressure that balancing cylinder moves up and down when this unsteady hydraulic control system provides unsteady by adjustable decompression overflow valve, repairing amount and spillway discharge are very little, do not influence the work of traveling pump main system.
Adjustable decompression overflow valve, two-bit triplet electromagnetic valve cooperate three position four-way electromagnetic valve, hydraulic control one-way valve to realize unsteady, locking function, and can realize the lifting of scraper plate when unsteady and locked.
Surface evenness after the milling is good, does not influence construction quality, has reached the purpose of this utility model.
Advantage: this floating installation, reduced the pressure of scraper plate to ground, improved construction quality, can realize unsteady, the locked and elevating function of milling machine scraper plate, for the control of milling machine scraper plate provides a new hydraulic control mode.Milling machine scraper plate in the course of the work can be realized action under the following one of four states: can rise when 1. floating, descend 2. open unsteady after, under the situation that operation is not risen, descended, scraper plate can descend at a slow speed automatically and can rise, descend when 3. locked when 4. locked until dropping down onto ground or oil cylinder minimum point, and scraper plate is in the optional position of rising, can remain in the decline process its stroke when electromagnetic valve cuts off the power supply.
Description of drawings
Fig. 1 is a hydraulic scheme of the present utility model.
Among the figure, 1, the two-bit triplet electromagnetic valve; 2, hydraulic control one-way valve; 3, three position four-way electromagnetic valve; 4, overflow valve; 5, safe off-load electromagnetic valve; 6, adjustable decompression overflow valve; 7, gear pump; 8, fuel tank; 9, scraper plate oil cylinder; 10, traveling pump slippage pump oil sources.
The specific embodiment
Embodiment 1: this floating type controlled system comprises two-bit triplet electromagnetic valve 1, hydraulic control one-way valve 2, three position four-way electromagnetic valve 3, overflow valve 4, safe off-load electromagnetic valve 5, adjustable decompression overflow valve 6, gear pump 7, fuel tank 8, scraper plate oil cylinder 9 and traveling pump slippage pump oil sources 10,2 mouthfuls of one end of scraper plate oil cylinder and two-bit triplet electromagnetic valve are connected, 3 mouthfuls of the two-bit triplet electromagnetic valve are connected by hydraulic control one-way valve 3 mouthfuls with three position four-way electromagnetic valve, and 4 mouthfuls of the other end of scraper plate oil cylinder and three position four-way electromagnetic valve are connected; Go into fuel tank by pipeline after 1 mouthful of three position four-way electromagnetic valve with safe off-load electromagnetic valve 1 mouthful is connected, be connected with an end of gear pump after 2 mouthfuls of three position four-way electromagnetic valve with safe off-load electromagnetic valve 2 mouthfuls are connected, the other end of gear pump is gone into fuel tank by pipeline; 1 mouthful of one end of adjustable decompression overflow valve and two-bit triplet electromagnetic valve is connected, and the other end of adjustable decompression overflow valve is connected with traveling pump slippage pump oil sources.
In Fig. 1, gear pump from the fuel tank oil suction to the moving system fuel feeding by the lifting of three position four-way electromagnetic valve control scraper plate oil cylinder, the pressure oil of the 25bar that the traveling pump slippage pump provides is that the adjustable decompression overflow valve 6 of 10bar offers two-bit triplet electromagnetic valve 1 and is used for floating of scraper plate oil cylinder via setting pressure; When carrying out normal milling work, three position four-way electromagnetic valve electromagnetic coil Y1, two position four-way solenoid valve electromagnetic coil Y2, safe off-load electromagnetic valve electromagnetic coil Y3 outage, two-bit triplet electromagnetic valve electromagnetic coil Y4 energising, the 25bar hydraulic oil that is provided by the traveling pump slippage pump is decompressed to 10bar after two-bit triplet electromagnetic valve 1 offers the loculus of scraper plate hoist cylinder through adjustable decompression overflow valve, realizes floating.Support force by ground when the machine milling degree of depth strengthens in the milling course of work rises scraper plate, and scraper plate when descending the relief function by adjustable decompression overflow valve make the pressure oil of loculus be reduced to 10bar until loculus pressure oil from adjustable decompression overflow valve oil sump tank, both guaranteed float function, scraper plate can freedom be moved downward at a slow speed.When needing artificial adjusting to rise as if scraper plate because of milling dark variation in the course of the work, two position four-way solenoid valve electromagnetic coil Y2, safe off-load electromagnetic valve electromagnetic coil Y3 are switched on, with seasonal two-bit triplet electromagnetic valve electromagnetic coil Y4 outage.Rising, two position four-way solenoid valve electromagnetic coil Y2, safe off-load electromagnetic valve electromagnetic coil Y3 cut off the power supply when stopping, and recover energising to continue keeping unsteady with seasonal two-bit triplet electromagnetic valve electromagnetic coil Y4; In like manner, when artificially descending, scraper plate can make the same seasonal two-bit triplet electromagnetic valve electromagnetic coil Y4 outage of three position four-way electromagnetic valve electromagnetic coil Y1, safe off-load electromagnetic valve electromagnetic coil Y3 energising, three position four-way electromagnetic valve electromagnetic coil Y1, safe off-load electromagnetic valve electromagnetic coil Y3 outage when stopping to descend, two-bit triplet electromagnetic valve electromagnetic coil Y4 recovers energising to be continued to keep floating.
During locking state, two-bit triplet electromagnetic valve electromagnetic coil Y4 outage, when three position four-way electromagnetic valve electromagnetic coil Y1, two position four-way solenoid valve electromagnetic coil Y2, the equal no power of safe off-load electromagnetic valve electromagnetic coil Y3, fluid-control one-way hydraulic valve 2 on the Sandwich plate valve has pinned the loculus of scraper plate hoist cylinder, makes it be parked in original position.Under two-bit triplet electromagnetic valve electromagnetic coil Y4 off-position, scraper plate rises during two position four-way solenoid valve electromagnetic coil Y2, safe off-load electromagnetic valve electromagnetic coil Y3 energising, and scraper plate descends during three position four-way electromagnetic valve electromagnetic coil Y1, safe off-load electromagnetic valve electromagnetic coil Y3 energising.Rising, the decline of scraper plate when thereby realization is unsteady, locked.
Claims (1)
1. the defeated material milling machine scraper plate hydraulic control system of floating after a kind, it is characterized in that: this floating type controlled system comprises the two-bit triplet electromagnetic valve, hydraulic control one-way valve, three position four-way electromagnetic valve, overflow valve, safe off-load electromagnetic valve, adjustable decompression overflow valve, gear pump, fuel tank, scraper plate oil cylinder and traveling pump slippage pump oil sources, one end of scraper plate oil cylinder is connected with (2) of two-bit triplet electromagnetic valve mouth, (3) mouth of two-bit triplet electromagnetic valve is connected with (3) mouth of three position four-way electromagnetic valve by hydraulic control one-way valve, and the other end of scraper plate oil cylinder is connected with (4) mouth of three position four-way electromagnetic valve; (1) mouth of three position four-way electromagnetic valve is connected the back with (1) mouth of safe off-load electromagnetic valve and goes into fuel tank by pipeline, (2) mouth of three position four-way electromagnetic valve is connected the back with (2) mouth of safe off-load electromagnetic valve and is connected with an end of gear pump, and the other end of gear pump is gone into fuel tank by pipeline; One end of adjustable decompression overflow valve is connected with (1) of two-bit triplet electromagnetic valve mouth, and the other end of adjustable decompression overflow valve is connected with traveling pump slippage pump oil sources.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120150996 CN202073018U (en) | 2011-05-07 | 2011-05-07 | Hydraulic control system for flotation of rear-material-conveying milling machine scraper plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120150996 CN202073018U (en) | 2011-05-07 | 2011-05-07 | Hydraulic control system for flotation of rear-material-conveying milling machine scraper plate |
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| Publication Number | Publication Date |
|---|---|
| CN202073018U true CN202073018U (en) | 2011-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120150996 Expired - Lifetime CN202073018U (en) | 2011-05-07 | 2011-05-07 | Hydraulic control system for flotation of rear-material-conveying milling machine scraper plate |
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| CN (1) | CN202073018U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103726435A (en) * | 2013-10-09 | 2014-04-16 | 徐州徐工特种工程机械有限公司 | Hydraulic control system of milling device |
| CN104160092A (en) * | 2012-03-08 | 2014-11-19 | 维特根有限公司 | Self-propelled road milling machine for processing road surfaces, and method for processing road surfaces |
| CN107268511A (en) * | 2017-06-21 | 2017-10-20 | 中国重汽集团柳州运力科迪亚克机械有限责任公司 | Snow sweeper |
| CN110094376A (en) * | 2019-06-10 | 2019-08-06 | 徐州徐工筑路机械有限公司 | A kind of milling mechanism side plate floating type controlled system |
-
2011
- 2011-05-07 CN CN 201120150996 patent/CN202073018U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104160092A (en) * | 2012-03-08 | 2014-11-19 | 维特根有限公司 | Self-propelled road milling machine for processing road surfaces, and method for processing road surfaces |
| CN104160092B (en) * | 2012-03-08 | 2016-03-23 | 维特根有限公司 | For the treatment of the self-driven road milling machine on road surface and the method for the treatment of road surface |
| US10450709B2 (en) | 2012-03-08 | 2019-10-22 | Wirtgen Gmbh | Self-propelled road milling machine for milling road surfaces, in particular large-scale milling machine, and method for milling road surfaces |
| CN103726435A (en) * | 2013-10-09 | 2014-04-16 | 徐州徐工特种工程机械有限公司 | Hydraulic control system of milling device |
| CN103726435B (en) * | 2013-10-09 | 2016-04-27 | 徐州徐工特种工程机械有限公司 | A kind of milling device hydraulic control system |
| CN107268511A (en) * | 2017-06-21 | 2017-10-20 | 中国重汽集团柳州运力科迪亚克机械有限责任公司 | Snow sweeper |
| CN110094376A (en) * | 2019-06-10 | 2019-08-06 | 徐州徐工筑路机械有限公司 | A kind of milling mechanism side plate floating type controlled system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111214 |