Low-pressure side hydraulic oil on-line detection device of engineering machinery hydraulic system

Abstract

The invention discloses a low-pressure side hydraulic oil online detection device of an engineering machinery hydraulic system in the technical field of engineering machinery. The low-pressure side hydraulic oil online detection device is characterized in that the input end of an oil taking pipeline penetrates downwards from the top of a hydraulic oil tank and extends to a preset distance below the lowest liquid level of the hydraulic oil tank; the input end of the sensing assembly is connected to the output end of the oil taking pipeline, and hydraulic oil obtained by the oil taking pipeline is detected. The input end of the oil discharge pipeline is connected to the output end of the sensing assembly, and the detected hydraulic oil is discharged back to the hydraulic oil tank; the sensing assembly comprises a multi-parameter sensor and a cleanliness sensor, the input ends of the multi-parameter sensor and the cleanliness sensor are connected with the output end of the oil taking pipeline through a three-way pipe, and the output ends of the multi-parameter sensor and the cleanliness sensor are connected with the input end of the oil discharging pipeline through a switching valve; a flow regulating valve is further connected between the output end of the cleanliness sensor and the switching valve; according to the invention, the oil can be ensured to be in an ideal test environment, and the data is more real and effective.

Description

Technical Field

[0001] The invention relates to the technical field of engineering machinery, and in particular to an online detection device for low-pressure side hydraulic oil of an engineering machinery hydraulic system. Background Art

[0002] The hydraulic system of construction machinery is a very critical high-pressure circulation system. In long-term use, the hydraulic medium has increased significantly due to wear particle size, oil aging, water content, bubbles, etc., which cannot be purified and detected in real time during operation. The change in the nature of the hydraulic medium is directly reflected in the decrease in the control accuracy of the hydraulic servo system, which further affects the processing accuracy of the equipment. In order to avoid this situation, it is necessary to design a set of auxiliary systems that can accurately judge whether the oil quality can maintain normal lubrication and sealing and continuous output power, or abnormal conditions caused by changes in hydraulic oil quality, and the existence of potential dangers. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art and provide an online detection device for low-pressure side hydraulic oil of a hydraulic system of an engineering machinery, so as to solve the technical problem of how to efficiently and accurately detect the oil quality of hydraulic oil in the hydraulic system of the engineering machinery.

[0004] To achieve the above object, the present invention is implemented by adopting the following technical solutions: The present invention provides an online detection device for low-pressure side hydraulic oil of a hydraulic system of an engineering machinery, comprising: An oil extraction pipeline, the input end of which penetrates downward from the top of the hydraulic oil tank and extends to a preset distance below the lowest liquid level of the hydraulic oil tank; A sensor component, the input end of which is connected to the output end of the oil extraction pipeline, for detecting the hydraulic oil obtained by the oil extraction pipeline; An oil drain pipeline, the input end of which is connected to the output end of the sensor assembly, drains the detected hydraulic oil back to the hydraulic oil tank.

[0005] Optionally, an oil outlet and an oil inlet are provided on the top of the hydraulic oil tank; the oil intake pipeline is made of a steel pipe, fixed to the oil outlet by a threaded connection, and penetrates vertically downward to extend to a preset distance below the lowest liquid level of the hydraulic oil tank; the output end of the oil discharge pipeline is connected to the oil inlet.

[0006] Optionally, ball valves are provided on the oil intake pipeline and the oil discharge pipeline near the outer sides of the oil outlet and the oil inlet.

[0007] Optionally, the sensing assembly includes a multi-parameter sensor and a cleanliness sensor, the input ends of the multi-parameter sensor and the cleanliness sensor and the output end of the oil intake pipeline are connected through a three-way pipe, and the output ends of the multi-parameter sensor and the cleanliness sensor and the input end of the oil discharge pipeline are connected through a switching valve.

[0008] Optionally, a flow regulating valve is further connected between the output end of the cleanliness sensor and the switching valve.

[0009] Optionally, a flow pump is provided on the oil intake pipeline or the oil discharge pipeline.

[0010] Optionally, the oil intake pipeline and the oil discharge pipeline are respectively provided with an inlet valve and an outlet valve.

[0011] Optionally, the online detection device includes a control machine, which is electrically connected to the sensor component, acquires collected data to generate oil quality, and uploads the oil quality to a display terminal.

[0012] Optionally, the display terminal includes a host computer interface and a vehicle dashboard.

[0013] Optionally, the display terminal is used to display the lubrication status and operation status of the hydraulic oil on the low-pressure side; A curve graph is drawn based on the oil quality, and state areas are divided according to the inflection points on the curve graph. The lubrication state and operating state of the low-pressure side hydraulic oil are determined according to the state areas; the state areas include a normal area, a reminder area, and a warning area.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The invention provides an online detection device for the low-pressure side hydraulic oil of the hydraulic system of engineering machinery. It realizes continuous oil extraction and measurement through a specific oil extraction device, and then realizes data monitoring and processing through a monitoring box of an all-in-one multi-parameter sensor and a cleanliness sensor, and then transmits the data to a back-end control machine for data processing, analysis and display. At the same time, the adjustable oil rate and start-stop time and other controls ensure that the oil is in a relatively ideal test environment, and the data is more real and effective. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a connection diagram of a low-pressure side hydraulic oil online detection device provided by an embodiment of the present invention; Figure 2 is a connection diagram of a hydraulic oil tank provided by an embodiment of the present invention; Figure 3 is a curve chart of oil quality provided by an embodiment of the present invention; Figure 4 is an interface diagram of a display terminal provided by an embodiment of the present invention; The markings in the figure are: 1. Oil extraction pipeline; 11. Inlet valve; 2. Sensing component; 21. Multi-parameter sensor; 22. Cleanliness sensor; 23. Switching valve; 24. Flow control valve; 3. Oil discharge pipeline; 31. Outlet valve; 4. Hydraulic oil tank; 41. Oil outlet; 42. Oil inlet; 43. Ball valve; 5. Flow pump; 6. Control machine. DETAILED DESCRIPTION

[0016] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0017] Embodiment 1:

[0018] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides an online detection device for the low-pressure side hydraulic oil of a hydraulic system of an engineering machinery, comprising an oil intake pipeline 1, a sensor component 2 and an oil discharge pipeline 3; the input end of the oil intake pipeline 1 penetrates downward from the top of a hydraulic oil tank 4 and extends to a preset distance below the lowest liquid level of the hydraulic oil tank 4; the input end of the sensor component 2 is connected to the output end of the oil intake pipeline 1, and the hydraulic oil obtained by the oil intake pipeline 1 is detected; the input end of the oil discharge pipeline 3 is connected to the output end of the sensor component 2, and the detected hydraulic oil is discharged back to the hydraulic oil tank 4.

[0019] The top 4 of the hydraulic oil tank is provided with an oil outlet 41 and an oil inlet 42. The oil extraction pipeline 1 is made of a steel pipe, which is fixed to the oil outlet 41 by a threaded connection, and penetrates vertically downward, extending to a preset distance below the lowest liquid level of the hydraulic oil tank 4; the preset distance is generally set small, so that the input end of the oil extraction pipeline 1 is slightly lower than the lowest liquid level of the hydraulic oil tank 4. If it is too low, there will be more sedimentation, preventing inaccurate oil sampling. The use of a steel pipe can ensure the accuracy of the distance. The output end of the oil discharge pipeline 3 is connected to the oil inlet 42.

[0020] Ball valves 43 are provided on the oil intake pipeline 1 and the oil discharge pipeline 3 near the outer sides of the oil outlet 41 and the oil inlet 42. The ball valves 43 can realize quick loading and unloading, which is convenient for maintenance.

[0021] The sensor assembly 2 includes a multi-parameter sensor 21 and a cleanliness sensor 22. The input ends of the multi-parameter sensor 21 and the cleanliness sensor 22 and the output end of the oil intake pipeline 1 are connected through a three-way pipe, and the output ends of the multi-parameter sensor 21 and the cleanliness sensor 22 and the input end of the oil discharge pipeline 3 are connected through a switching valve 23. An inlet valve 11 and an outlet valve 31 are respectively provided on the oil intake pipeline 1 and the oil discharge pipeline 3. A flow regulating valve 24 is also connected between the output end of the cleanliness sensor 22 and the switching valve 23. The flow regulating valve 24 controls the flow of hydraulic oil passing through the cleanliness sensor 22 to ensure its detection effect. A flow pump 5 is provided on the oil intake pipeline 1 or the oil discharge pipeline 3. The flow pump 5 provides power for the transmission of hydraulic oil. In this embodiment, the flow pump 5 is provided on the oil discharge pipeline 3.

[0022] In summary, the detection flow path is divided into two relatively independent flow paths. The hydraulic oil to be detected enters from the inlet valve 11 → after the three-way, one path passes through the multi-parameter sensor 21 → switching valve 23 → flow pump 5 → oil drain pipeline 3 → outlet valve 31 → returns to the external circulation pipeline; the other path passes through the cleanliness sensor 22 → flow regulating valve 24 → switching valve 23 → flow pump 5 → oil drain pipeline 3 → outlet valve 31 → returns to the external circulation pipeline.

[0023] The online detection device includes a control machine 6, which is electrically connected to the sensor assembly 2, obtains the collected data to generate the oil quality (such as temperature, viscosity, density, water activity, cleanliness, etc.), and uploads the oil quality to the display terminal. In order to further realize automatic detection, the control machine 6 can also be connected to the flow pump 5, the multi-parameter sensor 21, the cleanliness sensor 22, the flow regulating valve 24, the inlet valve 11 and the outlet valve 31 to realize all-round electronic control.

[0024] Specifically in this embodiment, the display terminal includes a host computer interface and a vehicle instrument panel.

[0025] like Figure 3 As shown, a curve graph is drawn based on the oil quality, and the state areas are divided according to the inflection points on the curve graph. The lubrication state and operation state of the hydraulic oil on the low-pressure side are determined according to the state areas; the state areas include a normal area, a reminder area, and a warning area.

[0026] like Figure 4 As shown, the display terminal is used to display the lubrication status and operating status of the hydraulic oil on the low-pressure side.

[0027] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0028] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0029] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0030] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0031] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An online detection device for low-pressure side hydraulic oil of a hydraulic system of an engineering machinery, characterized in that: include: An oil extraction pipeline, the input end of which penetrates downward from the top of the hydraulic oil tank and extends to a preset distance below the lowest liquid level of the hydraulic oil tank; A sensor component, the input end of which is connected to the output end of the oil extraction pipeline, for detecting the hydraulic oil obtained by the oil extraction pipeline; An oil drain pipeline, the input end of which is connected to the output end of the sensor assembly, drains the detected hydraulic oil back to the hydraulic oil tank.

2. The low-pressure side hydraulic oil online detection device of the hydraulic system of engineering machinery according to claim 1 is characterized in that: An oil outlet and an oil inlet are provided on the top of the hydraulic oil tank. The oil intake pipeline is made of a steel pipe, which is fixed to the oil outlet through a threaded connection and penetrates vertically downward to extend to a preset distance below the lowest liquid level of the hydraulic oil tank; the output end of the oil discharge pipeline is connected to the oil inlet.

3. The low-pressure side hydraulic oil online detection device of the hydraulic system of engineering machinery according to claim 1 is characterized in that: Ball valves are arranged on the oil intake pipeline and the oil discharge pipeline near the outer sides of the oil outlet and the oil inlet.

4. The low-pressure side hydraulic oil online detection device of the hydraulic system of engineering machinery according to claim 1 is characterized in that: The sensing assembly includes a multi-parameter sensor and a cleanliness sensor. The input ends of the multi-parameter sensor and the cleanliness sensor and the output end of the oil intake pipeline are connected through a three-way pipe. The output ends of the multi-parameter sensor and the cleanliness sensor and the input end of the oil discharge pipeline are connected through a switching valve.

5. The low-pressure side hydraulic oil online detection device of the hydraulic system of engineering machinery according to claim 4 is characterized in that: A flow regulating valve is also connected between the output end of the cleanliness sensor and the switching valve.

6. The low-pressure side hydraulic oil online detection device of the hydraulic system of engineering machinery according to claim 1 is characterized in that: The oil intake pipeline or the oil discharge pipeline is provided with a flow pump.

7. The low-pressure side hydraulic oil online detection device of the hydraulic system of engineering machinery according to claim 1 is characterized in that: The oil intake pipeline and the oil discharge pipeline are respectively provided with an inlet valve and an outlet valve.

8. The low-pressure side hydraulic oil online detection device of the hydraulic system of engineering machinery according to claim 1 is characterized in that: The online detection device includes a control machine, which is electrically connected to the sensor component, obtains collected data to generate oil quality, and uploads the oil quality to a display terminal.

9. The low-pressure side hydraulic oil online detection device of the hydraulic system of engineering machinery according to claim 8, characterized in that: The display terminal includes a host computer interface and a vehicle instrument panel.

10. The low-pressure side hydraulic oil online detection device of the hydraulic system of engineering machinery according to claim 8, characterized in that: The display terminal is used to display the lubrication status and operation status of the hydraulic oil on the low-pressure side; A curve graph is drawn based on the oil quality, and state areas are divided according to the inflection points on the curve graph. The lubrication state and operating state of the low-pressure side hydraulic oil are determined according to the state areas; the state areas include a normal area, a reminder area, and a warning area.

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