CN212838656U - Hydraulic system for suspending and floating of movable arm of scraper - Google Patents
Hydraulic system for suspending and floating of movable arm of scraper Download PDFInfo
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- CN212838656U CN212838656U CN202021807767.2U CN202021807767U CN212838656U CN 212838656 U CN212838656 U CN 212838656U CN 202021807767 U CN202021807767 U CN 202021807767U CN 212838656 U CN212838656 U CN 212838656U
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- reversing valve
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- movable arm
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Abstract
The utility model discloses a scraper movable arm hovers and hydraulic system that floats, including switching-over valve I, switching-over valve II, switching-over valve III, overflow valve, movable arm hydro-cylinder, hydraulic pressure lock, the hydraulic pressure lock passes through oil circuit I with the pole chamber of movable arm hydro-cylinder to be connected, and the hydraulic pressure lock passes through oil circuit II with the no pole chamber of movable arm hydro-cylinder to communicate. The reversing valve I is connected with the oil way II, the reversing valve II is connected with the oil way I, and the reversing valve III is connected with the oil way II. The reversing valve I is respectively connected with a control cavity of the reversing valve II and a control cavity of the reversing valve III through a port B, and the reversing valve III is connected with the port B of the reversing valve II through a port B and an overflow valve. And the T port of the reversing valve I, the T port of the reversing valve II and the T port of the reversing valve III are respectively connected with an oil tank. The structure can prevent the materials in the bucket from scattering and prevent harmful impact on the frame of the scraper.
Description
Technical Field
The utility model relates to a scraper technical field, concretely relates to scraper movable arm hovers and hydraulic system floats.
Background
During transportation of the underground scraper, an operator does not actively operate the movable arm, the movable arm oil cylinder is in a locking state, the movable arm is in a rigid relatively static state (compared with a scraper main body), vehicle jolts are easily caused due to changes of road conditions, materials in a bucket are scattered, and accordingly transportation efficiency is reduced, and impact caused by jolt also has adverse effects on a scraper frame.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a scraper movable arm hovers and hydraulic system that floats to solve scraper and march the problem that the scraper bowl material that the movable arm rigidity is static relatively and produce scatters and the impact force destroys the scraper truck frame.
In order to achieve the purpose, the utility model discloses a hydraulic system for suspending and floating of a movable arm of a scraper, which comprises a movable reversing valve I, a reversing valve II, a reversing valve III, an overflow valve, a movable arm oil cylinder and a hydraulic lock, wherein the hydraulic lock is connected with a rod cavity of the movable arm oil cylinder through an oil way I, and is communicated with a rodless cavity of the movable arm oil cylinder through an oil way II; the reversing valve I is connected with the oil way II, the reversing valve II is connected with the oil way I, and the reversing valve III is connected with the oil way II; the reversing valve I is respectively connected with a control cavity of the reversing valve II and a control cavity of the reversing valve III through a port B, and the reversing valve III is connected with the port B of the reversing valve II through a port B and an overflow valve; and the T port of the reversing valve I, the T port of the reversing valve II and the T port of the reversing valve III are respectively connected with an oil tank.
Furthermore, the reversing valve I is an electromagnetic two-position four-way reversing valve, and the reversing valve II and the reversing valve III are hydraulic control two-position four-way reversing valves.
Further, the overflow valve is an electric proportional overflow valve.
Furthermore, the number of the movable arm oil cylinders is two, the two rod cavities are connected through an oil way, and the two rodless cavities are connected through an oil way.
The utility model has the advantages that: the reversing valve II and the reversing valve III are controlled through the reversing valve I, the pressure of the overflow valve is set, the boom cylinder is in three states, one state is a locking state, the second state is a hovering state, the third state is a floating state, the influence of uneven road surfaces on the boom can be effectively buffered in the latter two states, the boom is converted from a rigid static state into a buffering state, and therefore the problems of bulk materials and impact on a scraper frame in the prior art are solved.
Drawings
FIG. 1 is a schematic diagram of a hydraulic system of the present invention;
in the figure, 1-reversing valves I and 2-reversing valves II and 3-reversing valves III and 4-overflow valves, 5-boom oil cylinders, 6-hydraulic locks, and 7-oil ways I and 8-oil ways II.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
As shown in fig. 1, the hydraulic system for suspending and floating of a movable arm of a scraper comprises a movable reversing valve I1, a reversing valve II2, a reversing valve III3, an overflow valve 4, a movable arm cylinder 5 and a hydraulic lock 6, wherein the hydraulic lock 6 is connected with a rod cavity of the movable arm cylinder 5 through an oil path I7, and the hydraulic lock 6 is communicated with a rodless cavity of the movable arm cylinder 5 through an oil path II 8; the reversing valve I1 is connected with an oil way II8, the reversing valve II2 is connected with an oil way I7, and the reversing valve III3 is connected with an oil way II 8; the reversing valve I1 is respectively connected with a control cavity of the reversing valve II2 and a control cavity of the reversing valve III3 through a port B, and the reversing valve III3 is connected with the port B of the reversing valve II2 through an overflow valve 4 through the port B; the T port of the reversing valve I1, the T port of the reversing valve II2 and the T port of the reversing valve III3 are respectively connected with an oil tank. Wherein, the change-over valve I1 adopts an electromagnetic two-position four-way change-over valve, the change-over valve II2 and the change-over valve III3 adopt a hydraulic control two-position four-way change-over valve, and the overflow valve 4 adopts an electric proportional overflow valve. The boom cylinder 5 of the present embodiment is provided in two, and the two rod chambers are connected by an oil path, and the two rodless chambers are connected by an oil path.
The working principle of the system is as follows: after the scraper scrapes materials, the bucket stops in a half-empty state, at the moment, the movable arm oil cylinder 5 is in a hydraulic locking state, hydraulic oil is sealed between the hydraulic lock 6 and the movable arm oil cylinder 5, the bucket is filled with the materials and moves forwards, and the movable arm and the scraper main body are in a rigid relative static state. When the electromagnet coil of the reversing valve I1 is not electrified, the valve core of the electromagnetic valve is in the working position shown in the figure, hydraulic oil is blocked, the movable arm oil cylinder 5 is in a locking state, when the electromagnet coil is electrified, the valve core is in the second working position, the hydraulic oil enters the reversing valve II2 and the control cavity of the reversing valve 3 through the port B from the port P, the reversing valve II2 is controlled by the hydraulic oil to be switched from the working position 1 to the working position 2, and the port P is communicated with the port B; the reversing valve III3 is controlled by hydraulic oil to be switched from the working position 1 to the working position 2, the port P is communicated with the port B, a rodless cavity of the boom cylinder 5 is communicated with the port A of the overflow valve 6 through the reversing valve III3, and a rod cavity of the boom cylinder 5 is communicated with the port B of the overflow valve 6 through the reversing valve II 2. According to the load condition and the impact condition, the pressure of the overflow valve 6 is set, when the load pressure of the boom cylinder 5 is greater than the pressure set by the overflow valve 6, the A, B port of the overflow valve 6 is communicated, the oil in the rodless cavity of the boom cylinder 5 flows to the P-B port of the reversing valve III3 through the oil path II8, then flows through the A-B port of the overflow valve 6, flows through the B-P port of the reversing valve II, flows into the oil path I1, finally flows into the rod cavity of the boom cylinder 5, the pressure oil in the rodless cavity is released to the rod cavity, and the boom cylinder 5 is in a floating state.
When the load pressure of the boom cylinder 5 is smaller than the set pressure value of the overflow valve 6, the A, B port of the overflow valve 6 is closed, the oil paths of the rod cavity and the rodless cavity of the boom cylinder 5 are cut off, and the boom cylinder 5 is in a hovering state. The suspension state refers to a state that the movable arm is in a small fluctuation state up and down in the process that the bucket is filled with materials and moves, and the floating state refers to a state that the movable arm is uniformly and quickly descended for a certain distance in the process that the bucket is filled with materials and moves.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes that can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those skilled in the art can be made within the scope of the claims of the present invention.
Claims (4)
1. The utility model provides a scraper movable arm hovers and hydraulic system that floats which characterized in that: the hydraulic control system comprises a reversing valve I (1), a reversing valve II (2), a reversing valve III (3), an overflow valve (4), a movable arm oil cylinder (5) and a hydraulic lock (6), wherein the hydraulic lock (6) is connected with a rod cavity of the movable arm oil cylinder (5) through an oil way I (7), and the hydraulic lock (6) is communicated with a rodless cavity of the movable arm oil cylinder (5) through an oil way II (8); the reversing valve I (1) is connected with the oil way II (8), the reversing valve II (2) is connected with the oil way I (7), and the reversing valve III (3) is connected with the oil way II (8); the reversing valve I (1) is respectively connected with a control cavity of the reversing valve II (2) and a control cavity of the reversing valve III (3) through a port B, and the reversing valve III (3) is connected with the port B of the reversing valve II (2) through the overflow valve (4) through the port B; and the T port of the reversing valve I (1), the T port of the reversing valve II (2) and the T port of the reversing valve III (3) are respectively connected with an oil tank.
2. The scraper boom hover and float hydraulic system of claim 1, wherein: the reversing valve I (1) is an electromagnetic two-position four-way reversing valve, and the reversing valve II (2) and the reversing valve III (3) are hydraulic control two-position four-way reversing valves.
3. The scraper boom hover and float hydraulic system of claim 1, wherein: the overflow valve (4) is an electric proportional overflow valve.
4. The scraper boom hover and float hydraulic system of claim 1, wherein: the movable arm oil cylinders (5) are two, the two rod cavities are connected through an oil way, and the two rodless cavities are connected through an oil way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021807767.2U CN212838656U (en) | 2020-08-26 | 2020-08-26 | Hydraulic system for suspending and floating of movable arm of scraper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021807767.2U CN212838656U (en) | 2020-08-26 | 2020-08-26 | Hydraulic system for suspending and floating of movable arm of scraper |
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| Publication Number | Publication Date |
|---|---|
| CN212838656U true CN212838656U (en) | 2021-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021807767.2U Active CN212838656U (en) | 2020-08-26 | 2020-08-26 | Hydraulic system for suspending and floating of movable arm of scraper |
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| CN (1) | CN212838656U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115748855A (en) * | 2022-12-16 | 2023-03-07 | 徐州徐工挖掘机械有限公司 | Excavator movable arm floating hydraulic control system and control method |
-
2020
- 2020-08-26 CN CN202021807767.2U patent/CN212838656U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115748855A (en) * | 2022-12-16 | 2023-03-07 | 徐州徐工挖掘机械有限公司 | Excavator movable arm floating hydraulic control system and control method |
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