CN110616770A - Anti-suction control system and control method for bucket rod oil cylinder, bucket rod oil cylinder and excavator - Google Patents
Anti-suction control system and control method for bucket rod oil cylinder, bucket rod oil cylinder and excavator Download PDFInfo
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- CN110616770A CN110616770A CN201910901115.0A CN201910901115A CN110616770A CN 110616770 A CN110616770 A CN 110616770A CN 201910901115 A CN201910901115 A CN 201910901115A CN 110616770 A CN110616770 A CN 110616770A
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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
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2221—Control of flow rate; Load sensing arrangements
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- Operation Control Of Excavators (AREA)
Abstract
The invention provides an anti-suction control system and an anti-suction control method for a bucket rod oil cylinder, the bucket rod oil cylinder and an excavator, and relates to the technical field of engineering machinery, wherein the anti-suction control system for the bucket rod oil cylinder comprises a first pressure sensor, a controller and a flow control valve; the controller is respectively connected with the first pressure sensor and the flow control valve; the flow control valve is arranged on an oil return path of the oil cylinder; the first pressure sensor is used for detecting pressure data in the large cavity of the oil cylinder and transmitting the pressure data to the controller; when the pressure data is larger than the preset data, the controller controls the flow control valve to increase the opening degree, so that the sectional area of the oil return passage is increased. The opening of the flow control valve can be properly changed according to the change of the large cavity pressure data, so that the oil return speed is adjusted, and the problem that the bucket rod oil cylinder is sucked to be empty is prevented. The oil way of the oil cylinder is additionally provided with the structure, so that the disassembly and assembly process is simple, the test time is not required to be spent, and the refitting efficiency is improved.
Description
Technical Field
The invention relates to the technical field of engineering machinery, in particular to an anti-suction control system and method for a bucket rod oil cylinder, the bucket rod oil cylinder and an excavator.
Background
With the development of social economy and the increase of labor cost, the excavator generally adopts a mode of installing a quick-change device and accessories in various forms to improve the working efficiency and deal with complex working conditions. The excavator is designed according to the working condition of using a standard bucket, and the additionally arranged quick-change device and other accessories are much heavier than the standard bucket, so that the phenomenon of suction during operation of the excavator can be caused, and the working efficiency is seriously influenced.
In the prior art, the problem of air suction is improved by replacing a new valve core or additionally arranging a single throttle valve at a cylinder. However, the dismounting process of replacing the valve core or installing the one-way throttle valve is complicated, and it takes time to test the proper size of the valve core or the proper opening degree of the single throttle valve.
Disclosure of Invention
The invention aims to provide an anti-empty-suction control system and method for a bucket rod oil cylinder, the bucket rod oil cylinder and an excavator, and aims to solve the technical problems that in the prior art, the empty suction problem is improved by replacing a new valve core or additionally installing a single throttle valve at the position of the oil cylinder, the disassembly and assembly processes are complicated, and time is spent on testing the proper size of the valve core or testing the proper opening degree of the single throttle valve.
The invention provides a bucket rod oil cylinder air suction prevention control system, which comprises: a first pressure sensor, a controller and a flow control valve; the controller is respectively connected with the first pressure sensor and the flow control valve; the flow control valve is arranged on an oil return path of the oil cylinder; the first pressure sensor is used for detecting pressure data in the large cavity of the oil cylinder and transmitting the pressure data to the controller; and when the pressure data is larger than preset data, the controller controls the flow control valve to increase the opening degree, so that the sectional area of the return oil path is increased.
Further, the first pressure sensor is arranged on an oil inlet path of the oil cylinder.
Furthermore, the flow control valve is a two-position three-way proportional electromagnetic valve.
Further, the anti-suction control system for the bucket rod oil cylinder further comprises a second pressure sensor and a third pressure sensor; the second pressure sensor and the third pressure sensor are respectively connected with the controller; the second pressure sensor and the third pressure sensor are respectively used for detecting pressure data of an oil inlet end and pressure data of an oil return end of the hydraulic control multi-way valve and transmitting the data to the controller; when the pressure data of the oil inlet end exceeds a preset value, the controller controls the flow control valve to be closed, and when the pressure data of the oil return end exceeds a preset value, the controller controls the flow control valve to be opened.
Further, the bucket rod oil cylinder anti-suction control system further comprises an oil inlet pilot valve and an oil return pilot valve; the oil inlet pilot valve is connected with the oil inlet end of the hydraulic control multi-way valve, and the second pressure sensor is arranged on the oil inlet pilot valve; the oil return pilot valve is connected with an oil return end of the hydraulic control multi-way valve, and the oil return pilot valve is provided with the third pressure sensor.
Further, the controller is electrically connected to the first pressure sensor and the flow control valve, respectively.
Further, the invention also provides a bucket rod oil cylinder anti-suction control method based on the bucket rod oil cylinder anti-suction control system, which comprises the following steps: when the excavator carries out excavation action, detecting pressure data in a large cavity of an oil cylinder; judging whether the data is larger than preset data or not; when the data is larger than the preset data, the flow control valve is controlled to increase the opening degree, so that the sectional area of the oil return passage is increased.
Further, before the step of detecting the pressure data in the large cavity of the oil cylinder, the method further comprises the following steps: detecting pressure data of an oil inlet end of the hydraulic control multi-way valve and pressure data of an oil return end of the hydraulic control multi-way valve; respectively judging whether the pressure data of the oil inlet end and the pressure data of the oil return end are greater than preset data; and when the pressure data of the oil inlet end exceeds a preset value, the flow control valve is controlled to be closed, and when the pressure data of the oil return end exceeds a preset value, the flow control valve is controlled to be opened.
Further, the invention also provides a bucket rod oil cylinder which comprises an anti-suction control system of the bucket rod oil cylinder.
Furthermore, the invention also provides an excavator, and the excavator comprises a bucket rod oil cylinder.
According to the bucket rod oil cylinder anti-suction control system, in the use process, the first pressure sensor transmits detected pressure data in the large cavity of the oil cylinder to the controller, and when the pressure data is larger than preset data, the pressure of the large cavity is abnormal, and the pressure of the large cavity is overlarge. At the moment, on the premise of not changing the opening of the valve core of the hydraulic control multi-way valve, namely on the premise of keeping the flow of the oil way unchanged, the controller controls the flow control valve to increase the opening, so that the sectional area of an oil return channel is increased, the oil return speed is accelerated, the pressure of the small cavity is reduced, the pressure of the large cavity is finally reduced, the pressure value of the large cavity is made to return to the preset range, and the problem of suction of the bucket rod oil cylinder is prevented.
Therefore, the opening of the flow control valve can be properly changed according to the change of the pressure data of the large cavity, so that the oil return speed is adjusted, the pressure of the large cavity of the oil cylinder is always kept within a preset range, and the problem of suction of the bucket rod oil cylinder is further prevented. Meanwhile, the first pressure sensor, the controller and the flow control valve are additionally arranged on the oil way of the oil cylinder, the dismounting process is simple, the test time does not need to be spent, and the refitting efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural diagram of an anti-empty-suction control system for a bucket rod cylinder according to an embodiment of the present invention;
fig. 2 is a structural block diagram of an anti-empty-suction control method for a bucket rod cylinder according to an embodiment of the present invention.
Icon: 1-a first pressure sensor; 2-a controller; 3-a flow control valve; 4-oil cylinder; 5-large cavity; 6-hydraulic control multi-way valve; 7-an oil inlet pilot valve; 8-an oil return pilot valve; 9-small cavity.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, an anti-empty-suction control system for a bucket rod cylinder according to an embodiment of the present invention includes: a first pressure sensor 1, a controller 2, and a flow control valve 3; the controller 2 is respectively connected with the first pressure sensor 1 and the flow control valve 3; the flow control valve 3 is arranged on an oil return path of the oil cylinder 4; the first pressure sensor 1 is used for detecting pressure data in the large cavity 5 of the oil cylinder 4 and transmitting the pressure data to the controller 2; when the pressure data is larger than the preset data, the controller 2 controls the flow control valve 3 to increase the opening degree, thereby increasing the sectional area of the return oil path passage.
The flow control valve 3 may be a proportional solenoid valve.
Specifically, the controller 2 may be a PLC controller (programmable logic controller), an embedded chip controller, or an AI (artificial intelligence) controller, or the like.
The principle and specific implementation of cooperation between the controller 2, the first pressure sensor 1 and the flow control valve 3 are prior art and will not be described herein.
In the bucket rod oil cylinder anti-suction control system provided by the embodiment of the invention, in the use process, the first pressure sensor 1 transmits the detected pressure data in the large cavity 5 of the oil cylinder 4 to the controller 2, and when the pressure data is greater than the preset data, the pressure of the large cavity 5 is abnormal, and the pressure of the large cavity 5 is overlarge. At this time, on the premise of not changing the opening of the main valve core, namely on the premise of not changing the flow of the oil path, the controller 2 controls the flow control valve 3 to increase the opening, so that the sectional area of the oil path for returning oil is increased, the oil returning speed is increased, the pressure of the small cavity 9 is reduced, the pressure of the large cavity 5 is finally reduced, the pressure value of the large cavity 5 is made to return to the preset range, and the problem of air suction of the bucket rod oil cylinder 4 is prevented.
From the above, the above arrangement can properly change the opening of the flow control valve 3 according to the change of the pressure data of the large cavity 5, so as to adjust the oil return speed, keep the pressure of the large cavity 5 of the oil cylinder 4 within the preset range all the time, and further prevent the arm oil cylinder 4 from being sucked to be empty. Meanwhile, the first pressure sensor 1, the controller 2 and the flow control valve 3 are additionally arranged on the oil way of the oil cylinder 4, the dismounting process is simple, the test time is not required to be spent, and the refitting efficiency is improved.
As shown in fig. 1, in addition to the above-described embodiment, a first pressure sensor 1 is further provided on the oil inlet path of the oil cylinder 4.
Wherein, the first pressure sensor 1 can be arranged at an oil inlet of the oil cylinder 4.
The first pressure sensor 1 and the controller 2 may be in infrared connection.
The flow control valve 3 and the controller 2 may be in infrared connection.
In this embodiment, in the use, first pressure sensor 1 sets up on the oil inlet oil circuit of hydro-cylinder 4, and the measurement data in the big chamber 5 of hydro-cylinder 4 that like this can be more convenient, and measurement data is more accurate.
On the basis of the above embodiment, the flow control valve 3 is further a two-position three-way proportional solenoid valve.
Among them, the proportional solenoid valve is a hydraulic control device. On the common pressure valve, flow valve and direction valve, the proportional electromagnet is used to replace the original control part, and the pressure, flow or direction of oil flow is controlled remotely according to the input electric signal. Proportional solenoid valves generally have pressure compensation capability, and output pressure and flow can be unaffected by load changes.
In this embodiment, the setting of two-position three-way proportional solenoid valve can improve control accuracy under the prerequisite of control manufacturing cost.
On the basis of the embodiment, further, the anti-suction control system for the bucket rod oil cylinder further comprises a second pressure sensor and a third pressure sensor; the second pressure sensor and the third pressure sensor are respectively connected with the controller 2; the second pressure sensor and the third pressure sensor are respectively used for detecting pressure data of an oil inlet end and pressure data of an oil return end of the hydraulic control multi-way valve 6 and transmitting the data to the controller 2; when the pressure data of the oil inlet end exceeds a preset value, the controller 2 controls the flow control valve 3 to be closed, and when the pressure data of the oil return end exceeds the preset value, the controller 2 controls the flow control valve 3 to be opened.
The second pressure sensor is arranged at the oil inlet end of the hydraulic control multi-way valve 6, and the third pressure sensor is arranged at the oil return end of the hydraulic control multi-way valve 6.
In this embodiment, in the use process, when the pressure data of the oil inlet end detected by the second sensor exceeds the preset value, it indicates that the whole loop is an oil inlet loop, and at this time, since the flow control valve 3 does not need to work, the controller 2 controls the flow control valve 3 to close, and the flow control valve 3 can be in the neutral position. When the pressure data of the oil return end detected by the third sensor exceeds the preset value, which indicates that the whole circuit is an oil return circuit, at this time, the flow control valve 3 needs to work, and the controller 2 controls the flow control valve 3 to be started so as to adjust the opening degree thereof at an appropriate time. This arrangement enables the flow control valve 3 to be actuated when it is required to operate, and does not require the flow control valve 3 to be closed when it is required to operate, which can save consumption.
As shown in fig. 1, on the basis of the above embodiment, further, the bucket rod cylinder air suction prevention control system further includes an oil inlet pilot valve 7 and an oil return pilot valve 8; the oil inlet pilot valve 7 is connected with the oil inlet end of the hydraulic control multi-way valve 6, and a second pressure sensor is arranged on the oil inlet pilot valve 7; the oil return pilot valve 8 is connected with an oil return end of the hydraulic control multi-way valve 6, and a third pressure sensor is arranged on the oil return pilot valve 8.
In the embodiment, in the use process, when oil enters, the oil enters the oil inlet pilot valve 7 through the hydraulic control multi-way valve 6, so that the second pressure sensor detects a pressure value; during oil return, oil enters the oil return pilot valve 8, so that the third pressure sensor detects a pressure value.
As shown in fig. 1, in addition to the above embodiment, the controller 2 is electrically connected to the first pressure sensor 1 and the flow control valve 3, respectively.
In this embodiment, the electric connection mode can make the detection data transmission more accurate, and control more accurate.
As shown in fig. 2, on the basis of the above embodiment, the present invention further provides an anti-empty-suction control method for an arm cylinder based on the anti-empty-suction control system for the arm cylinder, including the following steps: when the excavator carries out excavation action, pressure data in the large cavity 5 of the oil cylinder 4 are detected; judging whether the data is larger than preset data or not; when the data is larger than the preset data, the flow control valve 3 is controlled to increase the opening degree, thereby increasing the sectional area of the return oil passage.
In this embodiment, in the use process, the first pressure sensor 1 transmits the detected pressure data in the large cavity 5 of the oil cylinder 4 to the controller 2, and when the pressure data is greater than the preset data, it indicates that the pressure in the large cavity 5 is abnormal, and the pressure in the large cavity 5 is too large. At this time, on the premise of not changing the opening of the main valve core, namely on the premise of not changing the flow of the oil path, the controller 2 controls the flow control valve 3 to increase the opening, so that the sectional area of the oil path for returning oil is increased, the oil returning speed is increased, the pressure of the small cavity 9 is reduced, the pressure of the large cavity 5 is finally reduced, the pressure value of the large cavity 5 is made to return to the preset range, and the problem of air suction of the bucket rod oil cylinder 4 is prevented.
Therefore, the opening degree of the flow control valve 3 can be properly changed according to the change of the pressure data of the large cavity 5, so that the oil return speed is adjusted, the pressure of the large cavity 5 of the oil cylinder 4 is always kept within a preset range, and the problem of suction of the arm oil cylinder 4 is further prevented. Meanwhile, the first pressure sensor 1, the controller 2 and the flow control valve 3 are additionally arranged on the oil way of the oil cylinder 4, the dismounting process is simple, the test time is not required to be spent, and the refitting efficiency is improved.
As shown in fig. 2, on the basis of the above embodiment, further, before the step of detecting the pressure data in the large cavity 5 of the oil cylinder 4, the method further includes: detecting pressure data of an oil inlet end of the hydraulic control multi-way valve 6 and pressure data of an oil return end of the hydraulic control multi-way valve 6; respectively judging whether the pressure data of the oil inlet end and the pressure data of the oil return end are greater than preset data; when the pressure data of the oil inlet end exceeds a preset value, the control flow control valve 3 is closed, and when the pressure data of the oil return end exceeds the preset value, the control flow control valve 3 is opened.
In this embodiment, in the use process, when the detected pressure data of the oil inlet end exceeds the preset value, it indicates that the whole loop is an oil inlet loop, and at this time, since the flow control valve 3 does not need to work, the flow control valve 3 is controlled to be closed, and the flow control valve 3 can be in the middle position. When the detected pressure data of the oil return end exceeds a preset value, the whole loop is an oil return loop, and at the moment, the flow control valve 3 needs to work, and the flow control valve 3 is controlled to be started so as to adjust the self opening degree at a proper time. This arrangement enables the flow control valve 3 to be actuated when it is required to operate, and does not require the flow control valve 3 to be closed when it is required to operate, which can save consumption.
On the basis of the embodiment, the invention further provides a bucket rod oil cylinder which comprises an anti-suction control system of the bucket rod oil cylinder.
In this embodiment, the implementation and beneficial effects of the arm cylinder are the same as those of the above-mentioned arm cylinder anti-suction control system, and are not described herein again.
On the basis of the embodiment, the invention further provides an excavator, and the excavator comprises an arm cylinder.
In this embodiment, the implementation and beneficial effects of the excavator are the same as those of the bucket rod cylinder, and are not described again here.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides an empty control system is prevented inhaling by dipper hydro-cylinder, a serial communication port, the control system is prevented inhaling by dipper hydro-cylinder includes: a first pressure sensor (1), a controller (2) and a flow control valve (3);
the controller (2) is respectively connected with the first pressure sensor (1) and the flow control valve (3); the flow control valve (3) is arranged on an oil return path of the oil cylinder (4);
the first pressure sensor (1) is used for detecting pressure data in a large cavity (5) of the oil cylinder (4) and transmitting the pressure data to the controller (2); when the pressure data is larger than preset data, the controller (2) controls the flow control valve (3) to increase the opening degree, so that the sectional area of the oil return passage is increased.
2. The arm cylinder anti-suck control system of claim 1, wherein the first pressure sensor (1) is disposed on an oil inlet path of the cylinder (4).
3. The bucket rod cylinder anti-empty-suction control system of claim 1, wherein the flow control valve (3) is a two-position three-way proportional solenoid valve.
4. The arm cylinder anti-empty-suction control system of claim 1, further comprising a second pressure sensor and a third pressure sensor; the second pressure sensor and the third pressure sensor are respectively connected with the controller (2);
the second pressure sensor and the third pressure sensor are respectively used for detecting pressure data of an oil inlet end and pressure data of an oil return end of the hydraulic control multi-way valve (6) and transmitting the data to the controller (2); when the pressure data of the oil inlet end exceeds a preset value, the controller (2) controls the flow control valve (3) to be closed, and when the pressure data of the oil return end exceeds the preset value, the controller (2) controls the flow control valve (3) to be opened.
5. The bucket rod oil cylinder anti-suction control system according to claim 4, further comprising an oil inlet pilot valve (7) and an oil return pilot valve (8);
the oil inlet pilot valve (7) is connected with the oil inlet end of the hydraulic control multi-way valve (6), and the second pressure sensor is arranged on the oil inlet pilot valve (7); the oil return pilot valve (8) is connected with an oil return end of the hydraulic control multi-way valve (6), and the third pressure sensor is arranged on the oil return pilot valve (8).
6. The arm cylinder anti-suck control system of claim 1, wherein the controller (2) is electrically connected to the first pressure sensor (1) and the flow control valve (3), respectively.
7. The bucket rod oil cylinder anti-suction control method based on the bucket rod oil cylinder anti-suction control system of any one of claims 1 to 6 is characterized by comprising the following steps of:
when the excavator performs excavation action, detecting pressure data in a large cavity (5) of an oil cylinder (4);
judging whether the data is larger than preset data or not;
when the data is larger than the preset data, the opening degree of the flow control valve (3) is controlled to be increased, so that the sectional area of the oil return passage is increased.
8. The arm cylinder anti-empty suction control method according to claim 7, characterized by further comprising, before the step of detecting pressure data in the large cavity (5) of the cylinder (4):
detecting pressure data of an oil inlet end of the hydraulic control multi-way valve (6) and pressure data of an oil return end of the hydraulic control multi-way valve (6);
respectively judging whether the pressure data of the oil inlet end and the pressure data of the oil return end are greater than preset data;
and when the pressure data of the oil inlet end exceeds a preset value, the flow control valve (3) is controlled to be closed, and when the pressure data of the oil return end exceeds a preset value, the flow control valve (3) is controlled to be opened.
9. A stick cylinder, characterized in that the stick cylinder comprises the stick cylinder anti-empty-suction control system according to any one of claims 1 to 6.
10. An excavator, wherein the excavator comprises the arm cylinder of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910901115.0A CN110616770A (en) | 2019-09-23 | 2019-09-23 | Anti-suction control system and control method for bucket rod oil cylinder, bucket rod oil cylinder and excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910901115.0A CN110616770A (en) | 2019-09-23 | 2019-09-23 | Anti-suction control system and control method for bucket rod oil cylinder, bucket rod oil cylinder and excavator |
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| Publication Number | Publication Date |
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| CN110616770A true CN110616770A (en) | 2019-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910901115.0A Pending CN110616770A (en) | 2019-09-23 | 2019-09-23 | Anti-suction control system and control method for bucket rod oil cylinder, bucket rod oil cylinder and excavator |
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| CN (1) | CN110616770A (en) |
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| CN111395425A (en) * | 2020-04-02 | 2020-07-10 | 上海三一重机股份有限公司 | Bucket rod oil cylinder control system and method and excavator |
| CN113293812A (en) * | 2021-06-30 | 2021-08-24 | 三一重机有限公司 | Method and device for preventing bucket rod from being sucked empty, operation machine and electronic equipment |
| CN117627084A (en) * | 2023-12-09 | 2024-03-01 | 爱克斯维智能科技(苏州)有限公司 | Excavator base material removing method and device, material shaking control system and excavator |
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| CN109736373A (en) * | 2018-12-30 | 2019-05-10 | 上海三一重机股份有限公司 | A kind of energy-saving control device and control method of the decline of control excavator boom |
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Application publication date: 20191227 |
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| RJ01 | Rejection of invention patent application after publication |