CN113089763A - Multi-stage safety handle control system and method for excavator - Google Patents
Multi-stage safety handle control system and method for excavator Download PDFInfo
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- CN113089763A CN113089763A CN202110410031.4A CN202110410031A CN113089763A CN 113089763 A CN113089763 A CN 113089763A CN 202110410031 A CN202110410031 A CN 202110410031A CN 113089763 A CN113089763 A CN 113089763A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/2004—Control mechanisms, e.g. control levers
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/2025—Particular purposes of control systems not otherwise provided for
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
- E02F9/2267—Valves or distributors
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Operation Control Of Excavators (AREA)
- Component Parts Of Construction Machinery (AREA)
Abstract
The invention discloses a control system and a control method for a multi-stage safety handle of an excavator, wherein the control system comprises a primary contact switch, a secondary contact switch, a safety handle, a pilot oil source, a left pilot handle, a right pilot handle, a primary safety electromagnetic valve, a secondary safety electromagnetic valve, a rotary safety valve and a walking pedal valve; the first-stage contact switch and the second-stage contact switch are independently arranged in the safety handle; the first-stage safety electromagnetic valve is respectively connected with the first-stage contact switch, the pilot oil source, the left pilot handle and the right pilot handle; the secondary safety electromagnetic valve is respectively connected with the secondary contact switch, the pilot oil source, the walking foot valve and the rotary safety valve; the rotary safety valve is also connected with the left pilot handle to control the on-off between the rotary pilot oil pressure output by the left pilot handle and a main valve rotary valve core of the excavator. The invention realizes that when the excavator works under the condition that the activity space is extremely limited, in order to reduce the potential safety hazard caused by manual operation errors, the safety handle limits the operation of walking and rotation, thereby improving the operation safety.
Description
Technical Field
The invention belongs to the technical field of safety handle control, and particularly relates to a multi-stage safety handle control system and method for an excavator.
Background
To prevent safety problems caused by mishandling, a safety handle is often provided between the entrance of the excavator cab and the seat. When a person leaves the seat, the safety handle needs to be put down to keep the channel smooth, at the moment, the pilot hydraulic oil cannot be supplied to the pilot handle and the walking foot valve, and the excavator cannot respond to the operation of the pilot handle and the walking foot valve.
When the excavator walks and rotates, the related upper vehicle rotates and the vehicle body moves, so that a large visual field blind area exists, and when the surrounding environment is complex, safety problems such as collision, treading and the like are easy to occur. Under the prior art scheme, no special limitation is made on walking and rotation, so that the safety problem caused by walking and rotation operation misoperation in a complex operation environment cannot be avoided.
Disclosure of Invention
Aiming at the problems, the invention provides a multi-stage safety handle control system of an excavator, which increases secondary protection on walking and rotating operation, and can improve operation safety by limiting walking and rotating operation through a safety handle in order to reduce potential safety hazards caused by human misoperation when the excavator works under the condition that the activity space is extremely limited.
In order to achieve the technical purpose and achieve the technical effects, the invention is realized by the following technical scheme:
in a first aspect, the present invention provides a multi-level safety handle control system for an excavator, comprising: the device comprises a primary contact switch, a secondary contact switch, a safety handle, a pilot oil source, a left pilot handle, a right pilot handle, a primary safety electromagnetic valve, a secondary safety electromagnetic valve, a rotary safety valve and a walking pedal valve;
the primary contact switch and the secondary contact switch are independently arranged and are both arranged in the safety handle;
the primary safety electromagnetic valve is connected with the primary contact switch and is respectively connected with a pilot oil source, a left pilot handle and a right pilot handle to control the pilot oil source to provide oil source supply for the left pilot handle and the right pilot handle;
the secondary safety electromagnetic valve is connected with the secondary contact switch and is respectively connected with a pilot oil source, a walking pedal valve and a rotary safety valve to control the oil source supply of the walking pedal valve and the on-off state of the rotary safety valve;
the rotary safety valve is also connected with the left pilot handle and controls the on-off between the rotary pilot oil pressure output by the left pilot handle and a main valve rotary valve core of the excavator.
Optionally, when the safety handle is in a closed state, both the first-stage contact switch and the second-stage contact switch are turned off, and the first-stage safety solenoid valve and the second-stage safety solenoid valve control the left pilot handle, the right pilot handle and the walking foot valve to be supplied without oil sources, so that the excavator does not respond to the operation of the left pilot handle, the right pilot handle and the walking foot valve.
Optionally, when the safety handle is in a primary safety open state, the primary contact switch is closed, and the secondary contact switch is opened; the primary safety solenoid valve controls the oil source supply of the left pilot handle and the right pilot handle; the secondary safety solenoid valve controls the oil-free supply of the walking foot valve, so that the excavator does not respond to the operation of the walking foot valve; the second-stage safety electromagnetic valve also controls the rotary safety valve to cut off the transmission of rotary pilot oil pressure output by the left pilot handle to a main valve rotary valve core of the excavator, so that the excavator does not respond to the rotary operation of the left pilot handle.
Optionally, when the safety handle is in a secondary safety open state, both the primary contact switch and the secondary contact switch are closed; the first-stage safety electromagnetic valve and the second-stage safety electromagnetic valve control the left pilot handle, the right pilot handle and the walking foot valve to be supplied with oil sources, and the second-stage safety electromagnetic valve also controls the rotary safety valve to conduct transmission of rotary pilot oil pressure output by the left pilot handle to a main valve rotary valve core of the excavator, so that the excavator responds to the operation of the left pilot handle, the right pilot handle and the walking foot valve.
Alternatively, when the travel pedal valve receives the supply of the oil source, the travel pilot oil pressure is output to a main valve travel spool of the excavator.
Optionally, the pilot oil source includes an oil tank and a pilot pump connected to the oil tank, and an output end of the pilot pump is connected to the first-stage safety solenoid valve and the second-stage safety solenoid valve respectively; and the rotary safety valve, the left pilot handle, the right pilot handle and the oil return port of the walking foot valve are connected to the oil tank.
In a second aspect, the invention provides a control method of the excavator multistage safety handle control system based on any one of the first aspect, which is characterized by comprising the following steps:
the safety handle is used for controlling the on-off state of the primary contact switch and the secondary contact switch;
the oil source supply of the left pilot handle and the right pilot handle is controlled by a first-level safety electromagnetic valve;
controlling the oil source supply of the walking foot valve by using the secondary safety electromagnetic valve, and simultaneously controlling the on-off state of the rotary safety valve;
and the control of the excavator is realized according to the oil source supply conditions of the left pilot handle, the right pilot handle and the walking foot valve and the on-off condition of the rotary safety valve.
Optionally, when the safety handle is in a closed state, both the first-stage contact switch and the second-stage contact switch are turned off, and the first-stage safety solenoid valve and the second-stage safety solenoid valve control the left pilot handle, the right pilot handle and the walking foot valve to be supplied without oil sources, so that the excavator does not respond to the operation of the left pilot handle, the right pilot handle and the walking foot valve.
Optionally, when the safety handle is in a primary safety open state, the primary contact switch is closed, and the secondary contact switch is opened; the primary safety solenoid valve controls the oil source supply of the left pilot handle and the right pilot handle; the secondary safety solenoid valve controls the oil-free supply of the walking foot valve, so that the excavator does not respond to the operation of the walking foot valve; the second-stage safety electromagnetic valve also controls the rotary safety valve to cut off the transmission of rotary pilot oil pressure output by the left pilot handle to a main valve rotary valve core of the excavator, so that the excavator does not respond to the rotary operation of the left pilot handle.
Optionally, when the safety handle is in a secondary safety open state, both the primary contact switch and the secondary contact switch are closed; the first-stage safety electromagnetic valve and the second-stage safety electromagnetic valve control the left pilot handle, the right pilot handle and the walking foot valve to be supplied with oil sources, and the second-stage safety electromagnetic valve also controls the rotary safety valve to conduct transmission of rotary pilot oil pressure output by the left pilot handle to a main valve rotary valve core of the excavator, so that the excavator responds to the operation of the left pilot handle, the right pilot handle and the walking foot valve.
Compared with the prior art, the invention has the beneficial effects that: the invention provides a multi-stage safety handle control system and a method for an excavator, which are characterized in that a secondary contact switch, a secondary safety electromagnetic valve and a rotary safety valve are arranged to specially limit the supply of walking pilot oil pressure and rotary pilot oil pressure to corresponding main valve spools, so that secondary protection for walking and rotary operation is increased.
Drawings
In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the present disclosure taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic structural diagram of a multi-level safety handle control system of an excavator according to an embodiment of the invention;
wherein:
XAtL-left travel forward pilot pressure, XBtL-left travel backward pilot pressure, XAtR-right travel forward pilot pressure, XBtR-right travel backward pilot pressure, XAs-left rotary pilot pressure, XBs-right rotary pilot pressure, S1-primary contact switch, S2-secondary contact switch, SOL 1-primary safety solenoid valve, SOL 2-secondary safety solenoid valve, Power-solenoid valve Power supply, Pc-pilot pump.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the scope of the invention.
The following detailed description of the principles of the invention is provided in connection with the accompanying drawings.
Example 1
The embodiment of the invention provides a multi-stage safety handle control system of an excavator, which comprises the following components as shown in figure 1: the device comprises a primary contact switch, a secondary contact switch, a safety handle, a pilot oil source, a left pilot handle, a right pilot handle, a primary safety electromagnetic valve, a secondary safety electromagnetic valve, a rotary safety valve and a walking pedal valve;
the primary contact switch S1 and the secondary contact switch S2 are independently arranged and are both arranged in the safety handle; in actual use, the primary contact switch S1 and the secondary contact switch S2 are both connected to a solenoid valve Power supply Power;
the primary safety electromagnetic valve SOL1 is connected with the primary contact switch S1, and is respectively connected with a pilot oil source, a left pilot handle and a right pilot handle to control the oil source supply of the left pilot handle and the right pilot handle;
the walking foot valve is connected with the rotary safety valve, the walking foot valve outputs walking pilot control oil pressure, and the rotary safety valve controls the on-off state of a rotary valve core of the main valve;
the secondary safety electromagnetic valve SOL2 is connected with the secondary contact switch S2, and is respectively connected with a pilot oil source, a walking foot valve and a rotary safety valve to control the oil source supply of the walking foot valve and the on-off state of the rotary safety valve;
the rotary safety valve is also connected with the left pilot handle and controls the on-off between rotary pilot oil pressure (XAs, XBs) output by the left pilot handle and a main valve rotary valve core of the excavator;
and outputting walking pilot oil pressure to a main valve walking spool of the excavator after the walking pedal valve obtains oil source supply, wherein the walking pilot oil pressure is XAtL, XBtL, XAtR and XBtR in the figure 1.
The working process of the multi-stage safety handle control system of the excavator in the embodiment of the invention is specifically as follows:
when the safety handle is in a closed state, the primary contact switch S1 and the secondary contact switch S2 are both turned off, and the primary safety solenoid valve SOL1 and the secondary safety solenoid valve SOL2 control the left pilot handle, the right pilot handle, and the walking foot valve to be supplied without oil sources, so that the excavator does not respond to the operation of the left pilot handle, the right pilot handle, and the walking foot valve.
When the safety handle is in a primary safety opening state, the primary contact switch S1 is closed, and the secondary contact switch S2 is opened; the first-stage safety solenoid valve SOL1 controls the left and right pilot handles to be supplied with oil from an oil source, and the second-stage safety solenoid valve SOL2 controls the walking foot valve to be supplied with no oil from an oil source, so that the excavator does not respond to the operation of the walking foot valve; the second-stage safety electromagnetic valve also controls the rotary safety valve to cut off the transmission of rotary pilot oil pressure output by the left pilot handle to a main valve rotary valve core of the excavator, so that the excavator does not respond to the rotary operation of the left pilot handle.
When the safety handle is in a secondary safety opening state, the primary contact switch S1 and the secondary contact switch S2 are both closed; the first-stage safety solenoid valve SOL1 and the second-stage safety solenoid valve SOL2 control the left pilot handle, the right pilot handle and the walking foot valve to be supplied with oil sources, and the second-stage safety solenoid valve also controls the rotary safety valve to conduct the transmission of rotary pilot oil pressure output by the left pilot handle to a main valve rotary valve core of the excavator, so that the excavator responds to the operation of the left pilot handle, the right pilot handle and the walking foot valve.
In a specific implementation manner of the embodiment of the present invention, as shown in fig. 1, the pilot oil source includes an oil tank and a pilot pump Pc connected to the oil tank, and an output end of the pilot pump Pc is connected to the first-stage safety solenoid valve and the second-stage safety solenoid valve respectively; the oil return ports of the rotary safety valve, the left pilot handle, the right pilot handle and the walking foot valve are all connected to the oil tank, and for implementation convenience, the oil return ports of the rotary safety valve, the left pilot handle, the right pilot handle and the walking foot valve are all connected to the same oil line and then flow into the oil tank.
Example 2
The embodiment of the invention provides a control method of a multistage safety handle control system of an excavator based on any one of embodiment 1, which comprises the following steps:
(1) the on-off states of the primary contact switch S1 and the secondary contact switch S2 are controlled by the safety handle;
(2) the oil source supply of the left pilot handle and the right pilot handle is controlled by a first-level safety electromagnetic valve SOL 1;
(3) the two-stage safety electromagnetic valve SOL2 is used for controlling the oil source supply of the walking foot valve and controlling the on-off state of the rotary safety valve;
(4) and the control of the excavator is realized according to the oil source supply conditions of the left pilot handle, the right pilot handle and the walking foot valve and the on-off condition of the rotary safety valve.
Specifically, the control method includes the following processes:
when the safety handle is in a closed state, the primary contact switch S1 and the secondary contact switch S2 are both turned off, and the primary safety solenoid valve SOL1 and the secondary safety solenoid valve SOL2 control the left pilot handle, the right pilot handle, and the walking foot valve to be supplied without oil sources, so that the excavator does not respond to the operation of the left pilot handle, the right pilot handle, and the walking foot valve.
When the safety handle is in a primary safety opening state, the primary contact switch S1 is closed, and the secondary contact switch S2 is opened; the first-stage safety solenoid valve SOL1 controls the left and right pilot handles to be supplied with oil from an oil source, and the second-stage safety solenoid valve SOL2 controls the walking foot valve to be supplied with no oil from an oil source, so that the excavator does not respond to the operation of the walking foot valve; the secondary safety solenoid valve SOL2 also controls the rotary safety valve to cut off the transmission of rotary pilot oil pressure output by the left pilot handle to the main valve rotary spool of the excavator, so that the excavator does not respond to the rotary operation of the left pilot handle.
When the safety handle is in a secondary safety opening state, the primary contact switch S1 and the secondary contact switch S2 are both closed; the first-stage safety solenoid valve SOL1 and the second-stage safety solenoid valve SOL2 control the left pilot handle, the right pilot handle and the walking foot valve to be supplied with oil sources, and the second-stage safety solenoid valve SOL2 also controls the rotary safety valve to conduct the transmission of rotary pilot oil pressure output by the left pilot handle to a main valve rotary valve core of the excavator, so that the excavator responds to the operation of the left pilot handle, the right pilot handle and the walking foot valve.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A multi-level safety handle control system for an excavator, comprising: the device comprises a primary contact switch, a secondary contact switch, a safety handle, a pilot oil source, a left pilot handle, a right pilot handle, a primary safety electromagnetic valve, a secondary safety electromagnetic valve, a rotary safety valve and a walking pedal valve;
the primary contact switch and the secondary contact switch are independently arranged and are both arranged in the safety handle;
the primary safety electromagnetic valve is connected with the primary contact switch and is respectively connected with a pilot oil source, a left pilot handle and a right pilot handle to control the pilot oil source to provide oil source supply for the left pilot handle and the right pilot handle;
the secondary safety electromagnetic valve is connected with the secondary contact switch and is respectively connected with a pilot oil source, a walking pedal valve and a rotary safety valve to control the oil source supply of the walking pedal valve and the on-off state of the rotary safety valve;
the rotary safety valve is also connected with the left pilot handle and controls the on-off between the rotary pilot oil pressure output by the left pilot handle and a main valve rotary valve core of the excavator.
2. The multi-level safety handle control system of an excavator according to claim 1, wherein: when the safety handle is in a closed state, the first-stage contact switch and the second-stage contact switch are both disconnected, the first-stage safety solenoid valve and the second-stage safety solenoid valve control the left pilot handle, the right pilot handle and the walking foot valve are all supplied without oil sources, so that the excavator does not respond to the operation of the left pilot handle, the right pilot handle and the walking foot valve.
3. The multi-level safety handle control system of an excavator according to claim 1, wherein: when the safety handle is in a first-stage safety opening state, the first-stage contact switch is closed, and the second-stage contact switch is opened; the primary safety solenoid valve controls the oil source supply of the left pilot handle and the right pilot handle; the secondary safety solenoid valve controls the oil-free supply of the walking foot valve, so that the excavator does not respond to the operation of the walking foot valve; the second-stage safety electromagnetic valve also controls the rotary safety valve to cut off the transmission of rotary pilot oil pressure output by the left pilot handle to a main valve rotary valve core of the excavator, so that the excavator does not respond to the rotary operation of the left pilot handle.
4. The multi-level safety handle control system of an excavator according to claim 1, wherein: when the safety handle is in a secondary safety opening state, the primary contact switch and the secondary contact switch are both closed; the first-stage safety electromagnetic valve and the second-stage safety electromagnetic valve control the left pilot handle, the right pilot handle and the walking foot valve to be supplied with oil sources, and the second-stage safety electromagnetic valve also controls the rotary safety valve to conduct transmission of rotary pilot oil pressure output by the left pilot handle to a main valve rotary valve core of the excavator, so that the excavator responds to the operation of the left pilot handle, the right pilot handle and the walking foot valve.
5. The multi-level safety handle control system of an excavator according to claim 1, wherein: when the walking foot valve obtains the oil source supply, the walking pilot oil pressure is output to a main valve walking valve core of the excavator.
6. The multi-level safety handle control system of an excavator according to claim 1, wherein: the pilot oil source comprises an oil tank and a pilot pump connected with the oil tank, and the output end of the pilot pump is respectively connected with the primary safety electromagnetic valve and the secondary safety electromagnetic valve; and the rotary safety valve, the left pilot handle, the right pilot handle and the oil return port of the walking foot valve are connected to the oil tank.
7. The control method of the excavator multistage safety handle control system according to any one of claims 1 to 6, comprising the following steps:
the safety handle is used for controlling the on-off state of the primary contact switch and the secondary contact switch;
the oil source supply of the left pilot handle and the right pilot handle is controlled by a first-level safety electromagnetic valve;
controlling the oil source supply of the walking foot valve by using the secondary safety electromagnetic valve, and simultaneously controlling the on-off state of the rotary safety valve;
and the control of the excavator is realized according to the oil source supply conditions of the left pilot handle, the right pilot handle and the walking foot valve and the on-off condition of the rotary safety valve.
8. The control method of the multistage safety handle of the excavator according to claim 7, wherein: when the safety handle is in a closed state, the first-stage contact switch and the second-stage contact switch are both disconnected, the first-stage safety solenoid valve and the second-stage safety solenoid valve control the left pilot handle, the right pilot handle and the walking foot valve are all supplied without oil sources, so that the excavator does not respond to the operation of the left pilot handle, the right pilot handle and the walking foot valve.
9. The control method of the multistage safety handle of the excavator according to claim 7, wherein: when the safety handle is in a first-stage safety opening state, the first-stage contact switch is closed, and the second-stage contact switch is opened; the primary safety solenoid valve controls the oil source supply of the left pilot handle and the right pilot handle; the secondary safety solenoid valve controls the oil-free supply of the walking foot valve, so that the excavator does not respond to the operation of the walking foot valve; the second-stage safety electromagnetic valve also controls the rotary safety valve to cut off the transmission of rotary pilot oil pressure output by the left pilot handle to a main valve rotary valve core of the excavator, so that the excavator does not respond to the rotary operation of the left pilot handle.
10. The control method of the multistage safety handle of the excavator according to claim 7, wherein: when the safety handle is in a secondary safety opening state, the primary contact switch and the secondary contact switch are both closed; the first-stage safety electromagnetic valve and the second-stage safety electromagnetic valve control the left pilot handle, the right pilot handle and the walking foot valve to be supplied with oil sources, and the second-stage safety electromagnetic valve also controls the rotary safety valve to conduct transmission of rotary pilot oil pressure output by the left pilot handle to a main valve rotary valve core of the excavator, so that the excavator responds to the operation of the left pilot handle, the right pilot handle and the walking foot valve.
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| CN202110410031.4A CN113089763B (en) | 2021-04-16 | 2021-04-16 | Multi-stage safety handle control system and method for excavator |
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| CN202110410031.4A CN113089763B (en) | 2021-04-16 | 2021-04-16 | Multi-stage safety handle control system and method for excavator |
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Cited By (1)
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| CN114658058A (en) * | 2022-02-21 | 2022-06-24 | 中联重科土方机械有限公司 | Control method and control device for excavator, controller and excavator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114658058A (en) * | 2022-02-21 | 2022-06-24 | 中联重科土方机械有限公司 | Control method and control device for excavator, controller and excavator |
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| CN113089763B (en) | 2022-11-18 |
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