CN213392916U - Electro-hydraulic control system for judging stroke end point of hydraulic cylinder - Google Patents
Electro-hydraulic control system for judging stroke end point of hydraulic cylinder Download PDFInfo
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- CN213392916U CN213392916U CN202022231736.3U CN202022231736U CN213392916U CN 213392916 U CN213392916 U CN 213392916U CN 202022231736 U CN202022231736 U CN 202022231736U CN 213392916 U CN213392916 U CN 213392916U
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- 230000005611 electricity Effects 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 abstract description 6
- 239000003921 oil Substances 0.000 description 13
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000010727 cylinder oil Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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Abstract
The utility model discloses an electricity liquid control system for judging pneumatic cylinder stroke terminal belongs to the automatic control field of electricity liquid, including pneumatic cylinder, hydraulic control valve, hydraulic pump, pressure sensor and PLC controller, wherein: the hydraulic control valve is arranged between the hydraulic cylinder and the hydraulic pump, and the hydraulic control valve, the hydraulic cylinder and the hydraulic pump form a hydraulic loop; the pressure sensor is connected with oil ports at two ends of the hydraulic cylinder and used for collecting the pressure of the oil ports at two ends of the hydraulic cylinder; and the PLC is connected with the pressure sensor and used for judging whether the hydraulic cylinder reaches a stroke end point or not according to a comparison result of the pressure data difference value of the oil ports at the two ends of the hydraulic cylinder and a system preset value and controlling the switch of the hydraulic control valve. The utility model discloses a gather the pressure difference and judge whether to be the stroke terminal point, PLC controller control hydraulic control valve returns the meso-position when reacing the stroke terminal point, closes the hydro-cylinder control circuit, the utility model discloses do not need mounted position sensor just can judge whether the pneumatic cylinder reachs the stroke terminal point, control is simple, easily installs.
Description
Technical Field
The utility model relates to an electricity liquid automated control field especially relates to an electricity liquid control system for judging pneumatic cylinder stroke terminal.
Background
The automatic control of a hydraulic system is applied to more and more mechanical application fields, a travel switch and a position sensor are adopted for detecting the in-place position of a travel mechanism at present, and various travel sensors cannot be installed due to space limitation in certain application occasions.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide an easily control and can measure the electrohydraulic control system who is used for judging pneumatic cylinder stroke terminal point with the installation.
In order to solve the technical problem, the utility model provides a technical scheme as follows:
on the one hand, the utility model provides an electricity liquid control system for judging pneumatic cylinder stroke terminal, including pneumatic cylinder, hydraulic control valve, hydraulic pump, pressure sensor and PLC controller, wherein:
the hydraulic control valve is arranged between the hydraulic cylinder and the hydraulic pump, the hydraulic control valve, the hydraulic cylinder and the hydraulic pump form a hydraulic loop, and the hydraulic control valve is used for switching on and off the hydraulic loop;
the pressure sensor is connected with oil ports at two ends of the hydraulic cylinder and used for collecting the pressure of the oil ports at two ends of the hydraulic cylinder;
and the PLC is connected with the pressure sensor and is used for judging whether the hydraulic cylinder reaches a stroke end point or not according to a comparison result of the pressure data difference value of the oil ports at the two ends of the hydraulic cylinder and a system preset value and controlling the switch of the hydraulic control valve.
Furthermore, the number of the pressure sensors is two, and the two pressure sensors are respectively connected to oil ports at two ends of the hydraulic cylinder.
After adopting such design, the utility model discloses following advantage has at least:
the utility model discloses a gather the pressure of pneumatic cylinder both ends hydraulic fluid port, real-time calculation pneumatic cylinder during operation, the oil feed chamber pressure P1 and the time return chamber pressure P2 gathered by pressure sensor, pressure difference value delta P and default P3 through P1 and P2 carry out the comparison, judge whether the pneumatic cylinder reaches the stroke terminal point, PLC controller control hydraulic control valve returns the meso-position when reacing the stroke terminal point, closes hydro-cylinder control circuit, the utility model discloses do not need mounted position sensor just can judge whether the pneumatic cylinder reachs the stroke terminal point, control is simple, easily installs.
Drawings
The foregoing is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clear, the present invention will be further described in detail with reference to the accompanying drawings and the detailed description.
Fig. 1 is a schematic structural diagram of an embodiment of the electro-hydraulic control system for determining the stroke end of the hydraulic cylinder according to the present invention.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The utility model provides an example of an electricity liquid control system for judging pneumatic cylinder stroke terminal, as shown in FIG. 1, including pneumatic cylinder 1, hydraulic control valve 3, hydraulic pump 4, pressure sensor 2, pressure sensor 6 and PLC controller 5, wherein: the hydraulic control valve 3 is arranged between the hydraulic cylinder 1 and the hydraulic pump 4, the hydraulic control valve 3, the hydraulic cylinder 1 and the hydraulic pump 4 form a hydraulic loop, and the hydraulic control valve 3 is used for switching on and off the hydraulic loop;
the pressure sensor 2 and the pressure sensor 6 are respectively connected to oil ports at two ends of the hydraulic cylinder 1 and used for collecting the pressure of the oil ports at two ends of the hydraulic cylinder 1;
the PLC 5 is connected with the pressure sensor 2 and the pressure sensor 6 and used for judging whether the hydraulic cylinder 1 reaches a stroke end point or not according to a comparison result of the pressure data difference value of the oil ports at the two ends of the hydraulic cylinder 1 and a system preset value and controlling the hydraulic control valve 3 to be switched on and off.
When the utility model is used, the pressure sensor collects the oil port pressures at the two ends of the hydraulic cylinder and feeds pressure signals back to the PLC for data processing; when the hydraulic cylinder operates, the pressure difference value of the oil inlet of the hydraulic cylinder, which is acquired by the pressure sensor, is P1; the pressure difference value of the hydraulic cylinder oil return port collected by the pressure sensor is P2; the delta P is the difference between the pressure value P1 of the oil inlet and the pressure value P2 of the oil return opening, and the preset value P3 of the system is calibrated according to experience and tests; the PLC calculates the difference value delta P between P1 and P2 in real time and compares the difference value delta P with P3, and when the delta P is smaller than P3, the PLC judges that the hydraulic cylinder does not reach the stroke end and the hydraulic control valve does not act; when the delta P is larger than or equal to P3, the PLC judges that the hydraulic cylinder reaches the stroke end point and controls the hydraulic control valve to return to the middle position, and the oil cylinder control loop is closed; the utility model discloses whether need not the mounted position sensor just can judge the pneumatic cylinder and reach the stroke terminal point, control is simple, easily installs.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and those skilled in the art can make various modifications, equivalent changes and modifications using the above-described technical content, all of which fall within the scope of the present invention.
Claims (2)
1. The utility model provides an electrohydraulic control system for judging pneumatic cylinder stroke terminal, its characterized in that includes pneumatic cylinder, hydraulic control valve, hydraulic pump, pressure sensor and PLC controller, wherein:
the hydraulic control valve is arranged between the hydraulic cylinder and the hydraulic pump, the hydraulic control valve, the hydraulic cylinder and the hydraulic pump form a hydraulic loop, and the hydraulic control valve is used for switching on and off the hydraulic loop;
the pressure sensor is connected with oil ports at two ends of the hydraulic cylinder and used for collecting the pressure of the oil ports at two ends of the hydraulic cylinder;
and the PLC is connected with the pressure sensor and is used for judging whether the hydraulic cylinder reaches a stroke end point or not according to a comparison result of the pressure data difference value of the oil ports at the two ends of the hydraulic cylinder and a system preset value and controlling the switch of the hydraulic control valve.
2. The electro-hydraulic control system for judging the stroke end of the hydraulic cylinder according to claim 1, wherein the number of the pressure sensors is two, and the two pressure sensors are respectively connected to oil ports at two ends of the hydraulic cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022231736.3U CN213392916U (en) | 2020-10-09 | 2020-10-09 | Electro-hydraulic control system for judging stroke end point of hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022231736.3U CN213392916U (en) | 2020-10-09 | 2020-10-09 | Electro-hydraulic control system for judging stroke end point of hydraulic cylinder |
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| Publication Number | Publication Date |
|---|---|
| CN213392916U true CN213392916U (en) | 2021-06-08 |
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| CN202022231736.3U Active CN213392916U (en) | 2020-10-09 | 2020-10-09 | Electro-hydraulic control system for judging stroke end point of hydraulic cylinder |
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| CN (1) | CN213392916U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113494502A (en) * | 2021-08-05 | 2021-10-12 | 六盘水师范学院 | Digital hydraulic cylinder |
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2020
- 2020-10-09 CN CN202022231736.3U patent/CN213392916U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113494502A (en) * | 2021-08-05 | 2021-10-12 | 六盘水师范学院 | Digital hydraulic cylinder |
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Address after: 065300 Langfang City, Hebei Province, Dachang Chao Bai River Industrial Area Patentee after: Hebei Jinglong Intelligent Equipment Co.,Ltd. Address before: 065000 Dachang Chaobaihe Industrial Zone, Langfang City, Hebei Province Patentee before: LANGFANG JINGLONG HEAVY MACHINERY Co.,Ltd. |