CN101205938A - Floating hydraulic system for end gate of pavement milling and planning machine - Google Patents
Floating hydraulic system for end gate of pavement milling and planning machine Download PDFInfo
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- CN101205938A CN101205938A CNA2007101909577A CN200710190957A CN101205938A CN 101205938 A CN101205938 A CN 101205938A CN A2007101909577 A CNA2007101909577 A CN A2007101909577A CN 200710190957 A CN200710190957 A CN 200710190957A CN 101205938 A CN101205938 A CN 101205938A
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Abstract
The invention provides an end door floating hydraulic system of a pavement milling machine, which relates to a hydraulic system of the pavement milling and planning machine. The invention comprises a priority governor valve, an overflow valve, a first normal close two-position electromagnetic valve, a second normal close two-position electromagnetic valve, a three-position electromagnetic reversing clapper and an end door lift cylinder, wherein, a system high pressure oil outlet is connected with an oil inlet of the priority governor valve; a priority oil outlet of the priority governor valve is communicated with an oil inlet of the overflow valve, and communicated with an oil inlet of the first normal close two-position electromagnetic valve; a hydraulic fluid port of the three-position electromagnetic reversing clapper is communicated with an oil inlet of the second normal close two-position electromagnetic valve; an oil outlet of the second normal close two-position electromagnetic valve is connected with an oil outlet of the first normal close two-position electromagnetic valve, and then is communicated and connected with an oil conduit with a rod chamber of the end door lift cylinder via the hydraulic fluid port; the hydraulic fluid port of the three-position electromagnetic reversing clapper is communicated and connected with an oil conduit without rod chamber of the end door lift cylinder via the hydraulic fluid port. The invention fulfills simple structure, reliable performance, and aims of regulating the pressing force of the end door of the pavement milling machine to the pavement.
Description
Technical field
The present invention relates to a kind of hydraulic system of pavement milling machine, be specifically related to a kind of hydraulic system of end gate of pavement milling and planning machine, belong to the transfiguration field of mechanical technique.
Background technique
Pavement milling machine compresses the material of guaranteeing that milling goes out in the road surface by tail-gate and stays in the milling storehouse when the milling operation, utilizes belt conveyor to be transported on the truck then and transports.When the impacting force of tail-gate road pavement was big, the rewinding on road surface was clean, but brought additional friction for advancing of milling machine, had consumed engine power in a large number, and tire is skidded in the process of advancing, even caused the tail-gate distortion; The impacting force of tail-gate road pavement hour, though the milling machine advance resistance diminishes, the impacting force of road pavement reduces, and causes the rewinding of road pavement unclean, and the cleaning works amount is strengthened.Existing pavement milling machine mainly relies on the weight of tail-gate to realize compressing of road pavement, exists the uncontrollable defective of impacting force of tail-gate road pavement.
Summary of the invention
The object of the invention provides the tail-gate floating hydraulic system of impacting force adjustable size of the tail-gate road pavement of a kind of simple in structure, reliable performance, pavement milling machine, use this system, the impacting force of tail-gate road pavement is of moderate size, during pavement milling machine work, can make the road surface rewinding clean, bring additional friction can for again advancing of milling machine.
The present invention adopts following technological scheme:
A kind of milling machine tail-gate floating hydraulic system, comprise preferential series flow control valve F1, relief valve F2, first normally closed two solenoid valve F3, second normally closed two solenoid valve F4, three-position electromagnetic selector valve F5, tail-gate lift cylinder 1,2, described tail-gate lift cylinder 1,2 rodless cavity connects by oil pipe 11, rod chamber connects by oil pipe 12, the system high pressure oil export connects the oil inlet P of described preferential series flow control valve F1, the filler opening 6 of the logical relief valve F2 of the preferential oil outlet F11 of this preferential series flow control valve F1 and the oil inlet P 3 of logical first normally closed two solenoid valve F3, the hydraulic fluid port T5 of the logical three-position electromagnetic selector valve F5 of the bypass hydraulic fluid port F12 of preferential series flow control valve F1, the hydraulic fluid port P5 of three-position electromagnetic selector valve, 7 times system's fuel tanks of the oil outlet of relief valve F2, the oil inlet P 4 of logical second normally closed two the solenoid valve F4 of the hydraulic fluid port A5 of described three-position electromagnetic selector valve F5, the oil outlet A4 of these second normally closed two solenoid valve F4 links to each other with the oil outlet A3 of first normally closed two solenoid valve F3 and is connected tail-gate lift cylinder 1 after hydraulic fluid port A connects, the oil pipe 12 of 2 rod chamber, the hydraulic fluid port B5 of three-position electromagnetic selector valve F5 are connected through hydraulic fluid port B and are connected tail-gate lift cylinder 1, the oil pipe 11 of 2 rodless cavity.
Aforesaid milling machine tail-gate floating hydraulic system, wherein said preferential series flow control valve F1 are one the tunnel to advance the oil channel structures that two-way goes out, and wherein are provided with throttle mechanism F13 in a road of preferential oil outlet F11.
Aforesaid milling machine tail-gate floating hydraulic system, wherein said preferential series flow control valve F1, relief valve F2, first normally closed two solenoid valve F3 and second normally closed two solenoid valve F4 are installed on the side 31 of valve seat 3, described three-position electromagnetic selector valve F5 is installed on the side 32 of this valve seat, hydraulic fluid port P, P1, T are on the side 33 of described valve seat 3, and hydraulic fluid port A, B are on the back side 34 of valve seat 3.
The present invention is owing to provide a certain amount of pressure oil by preferential series flow control valve F1, relief valve F2 for tail-gate lift cylinder cavity of resorption, alleviate the impacting force of tail-gate road pavement, guaranteed the reasonable impacting force of tail-gate road pavement, avoided only depending on the weight of tail-gate to realize what compressing of road pavement caused: or the impacting force of road pavement is too little, and the rewinding of road pavement is unclean; Or the impacting force of road pavement is too big, brings additional friction for advancing of milling machine, and tire is skidded in the process of advancing, even causes the adverse consequences of tail-gate distortion.
Advantage of the present invention and characteristics will illustrate by the non-limitative illustration of following preferred embodiment and explain that these embodiments only provide as an example with reference to accompanying drawing.
Description of drawings
Fig. 1 is a hydraulic schematic diagram of the present invention;
Fig. 2 is the schematic representation that valve member of the present invention is installed;
Fig. 3 is the right elevation of Fig. 2;
Fig. 4 is the rear view of Fig. 2.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
As shown in Figure 1, the present invention includes preferential series flow control valve F1, relief valve F2, first normally closed two solenoid valve F3, second normally closed two solenoid valve F4, three-position electromagnetic selector valve F5, tail-gate lift cylinder 1,2.Because tail-gate broad, therefore adopt two lift cylinders 1,2 elevating tail gates, this tail-gate lift cylinder 1,2 rodless cavity and rod chamber are connected in parallel, the system high pressure oil export connects the oil inlet P of described preferential series flow control valve F1, the filler opening 6 of the logical relief valve F2 of the preferential oil outlet F11 of this preferential series flow control valve F1 and the oil inlet P 3 of logical first normally closed two solenoid valve F3, the hydraulic fluid port T5 of the logical three-position electromagnetic selector valve F5 of the bypass hydraulic fluid port F12 of preferential series flow control valve F1, the hydraulic fluid port P5 of three-position electromagnetic selector valve, 7 times system's fuel tanks of the oil outlet of relief valve F2, the oil inlet P 4 of logical second normally closed two the solenoid valve F4 of the hydraulic fluid port A5 of three-position electromagnetic selector valve F5, the oil outlet A4 of these second normally closed two solenoid valve F4 links to each other with the oil outlet A3 of first normally closed two solenoid valve F3 and is connected tail-gate lift cylinder 1 after hydraulic fluid port A connects, the oil pipe 12 of 2 rod chamber, the hydraulic fluid port B5 of three-position electromagnetic selector valve F5 are connected through hydraulic fluid port B and are connected tail-gate lift cylinder 1, the oil pipe 11 of 2 rodless cavity.
Pressure oil enters the tail-gate floating hydraulic system by the P mouth, be divided into two-way through preferential series flow control valve F1, the fuel-displaced filler opening 6 of one tunnel preferential oil outlet F11 to relief valve F2, the adjustment oil pressure of the setting of relief valve F2, when milling machine milling operation, tail-gate is because deadweight compresses the road surface, at this moment, first normally closed two solenoid valve F3 energising, pressure oil is pressed the oil pressure of the setting of relief valve F2, through the P3 mouth of first normally closed two solenoid valve F3 to the A3 mouth, hydraulic fluid port from valve seat 3 enters tail-gate lift cylinder 1 by oil pipe 12 again, 2 cavity of resorption makes tail-gate lift cylinder 1,2 produce lifting force upwards, alleviate the impacting force of tail-gate deadweight road pavement, by adjusting the pressure size of relief valve F2, can make tail-gate obtain rational impacting force.The oil return of tail-gate lift cylinder 1,2 rodless cavities is through the hydraulic fluid port B of oil pipe 11 by valve seat 3, and the hydraulic fluid port B5 that passes through three-position electromagnetic selector valve F5 passes through the hydraulic fluid port T oil sump tank of valve seat 3 then to P5 again.Another road pressure oil is fuel-displaced through the hydraulic fluid port F12 bypass of preferential series flow control valve F1, through the hydraulic fluid port T5 of three-position electromagnetic selector valve F5.
Disconnect in first normally closed two solenoid valve F3 outage, when second normally closed two solenoid valve F4 energising was opened, commutation about three-position electromagnetic selector valve F5 energising realized moving up and down of tail-gate.The meta function of three-position electromagnetic selector valve F5 is that P5, A5, B5 three hydraulic fluid ports communicate, and tail-gate floats, and like this, when three-position electromagnetic selector valve F5 was in meta, the rodless cavity oil return of tail-gate lift cylinder 1,2 also can be by hydraulic fluid port B5 to the P5 oil sump tank.
Preferential oil outlet F11 a road in be provided with throttle mechanism F13, can be used for controlling the flow that enters tail-gate lift cylinder 1,2 rod chambers.
As Fig. 2～shown in Figure 4, series flow control valve F1, relief valve F2, first normally closed two solenoid valve F3 and second normally closed two solenoid valve F4 are installed on the side 31 of valve seat 3, three-position electromagnetic selector valve F5 is installed on the side 32 of this valve seat, hydraulic fluid port P, P1, T are on the side 33 of valve seat 3, and hydraulic fluid port A, B are on the back side 34 of valve seat 3.Valve seat 3 connects the pipeline of each valve within it integrated, and external hydraulic fluid port A, B, P1, T are by the centralized arrangement that needs of as installed.
In addition to the implementation, the utility model can also have other mode of executions, and all employings are equal to the technological scheme of replacement or equivalent transformation formation, all drop in the protection domain of the utility model requirement.
Claims (3)
1. floating hydraulic system for end gate of pavement milling and planning machine, comprise preferential series flow control valve (F1), relief valve (F2), first normally closed two solenoid valves (F3), second normally closed two solenoid valves (F4), three-position electromagnetic selector valve (F5), tail-gate lift cylinder (1), (2), described tail-gate lift cylinder (1), (2) rodless cavity connects by oil pipe (12), rod chamber connects by oil pipe (11), it is characterized in that, the system high pressure oil outlet connects the filler opening (P) of described preferential series flow control valve (F1), the filler opening (6) of the logical relief valve (F2) of the preferential oil outlet (F11) of this preferential series flow control valve (F1) and the filler opening (P3) of logical first normally closed two solenoid valves (F3), the hydraulic fluid port (T5) of the logical three-position electromagnetic selector valve (F5) of the bypass hydraulic fluid port (F12) of described preferential series flow control valve (F1), the hydraulic fluid port (P5) of described three-position electromagnetic selector valve (F5), the oil outlet (7) of relief valve (F2) returns system's fuel tank, the filler opening (P4) of logical second normally closed two solenoid valves (F4) of the hydraulic fluid port (A5) of described three-position electromagnetic selector valve (F5), the oil outlet (A4) of these second normally closed two solenoid valves (F4) links to each other with the oil outlet (A3) of first normally closed two solenoid valves (F3) and is connected tail-gate lift cylinder (1) after hydraulic fluid port (A) is connected, the oil pipe of rod chamber (2) (12), the hydraulic fluid port (B5) of three-position electromagnetic selector valve (F5) are connected through hydraulic fluid port (B) and are connected tail-gate lift cylinder (1), the oil pipe of rodless cavity (2) (11).
2. floating hydraulic system for end gate of pavement milling and planning machine according to claim 1 is characterized in that, described preferential series flow control valve (F1) is one the tunnel to advance the oil channel structures that two-way goes out, and wherein is provided with throttle mechanism (F13) in a road of preferential oil outlet (F11).
3. floating hydraulic system for end gate of pavement milling and planning machine according to claim 1, it is characterized in that, described preferential series flow control valve (F1), relief valve (F2), first normally closed two solenoid valves (F3) and second normally closed two solenoid valves (F4) are installed on the side (31) of valve seat (3), described three-position electromagnetic selector valve (F5) is installed on the side (32) of this valve seat, hydraulic fluid port (P), (P1), (T) are on the side (33) of described valve seat (3), and hydraulic fluid port (A), (B) are on the back side (34) of the side (31) of valve seat (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101909577A CN101205938A (en) | 2007-12-04 | 2007-12-04 | Floating hydraulic system for end gate of pavement milling and planning machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101909577A CN101205938A (en) | 2007-12-04 | 2007-12-04 | Floating hydraulic system for end gate of pavement milling and planning machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101205938A true CN101205938A (en) | 2008-06-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101909577A Pending CN101205938A (en) | 2007-12-04 | 2007-12-04 | Floating hydraulic system for end gate of pavement milling and planning machine |
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| CN (1) | CN101205938A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102561165A (en) * | 2012-01-11 | 2012-07-11 | 中联重科股份有限公司 | Milling machine and watering washing unit thereof |
| CN106402461A (en) * | 2016-12-19 | 2017-02-15 | 上海华麒育泰工程材料有限公司 | Actuating air cylinder with pneumatic valve speed regulator |
| CN109083877A (en) * | 2018-10-17 | 2018-12-25 | 北京天顺长城液压科技有限公司 | Hydraulic control circuit for milling machine tail-gate |
| CN109812460A (en) * | 2019-03-19 | 2019-05-28 | 杭州弗维机电科技有限公司 | A kind of two-way controllable electromagnetic valve |
-
2007
- 2007-12-04 CN CNA2007101909577A patent/CN101205938A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102561165A (en) * | 2012-01-11 | 2012-07-11 | 中联重科股份有限公司 | Milling machine and watering washing unit thereof |
| CN106402461A (en) * | 2016-12-19 | 2017-02-15 | 上海华麒育泰工程材料有限公司 | Actuating air cylinder with pneumatic valve speed regulator |
| CN109083877A (en) * | 2018-10-17 | 2018-12-25 | 北京天顺长城液压科技有限公司 | Hydraulic control circuit for milling machine tail-gate |
| CN109812460A (en) * | 2019-03-19 | 2019-05-28 | 杭州弗维机电科技有限公司 | A kind of two-way controllable electromagnetic valve |
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Open date: 20080625 |