Oil monitoring device for hydraulic circulation system

Abstract

The utility model discloses an oil monitoring device for a hydraulic circulation system, and relates to the technical field of oil monitoring. An electrical unit comprises a PLC (Programmable Logic Controller), a power supply module, a buzzer and a display, the oil path unit comprises an oil product monitoring pipeline, a flow regulating valve, a granularity pollution sensor, a ferromagnetic granularity sensor, a Y-shaped pipeline filter, a gear pump, an oil product quality detection module and a flow meter; a water immersion detector is arranged at the inner bottom of the monitoring box; according to the utility model, rapid replacement and disassembly with an oil path of detected equipment can be realized, and the oil path detection device is suitable for oil path detection of different equipment; monitoring functions are diversified, automatic alarming can be carried out on self overflow, and oil leakage monitoring in the detection box is effectively achieved; by installing the Y-shaped pipeline filter on the monitoring oil way, the filter element of the filter structure is convenient to replace, the maintenance is convenient and efficient, the cleaning is convenient, and the data precision is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil fluid monitoring, and particularly relates to an oil fluid monitoring device for a hydraulic circulation system. Background Art

[0002] Oil fluid monitoring technology obtains information on the lubrication and wear status of a machine by analyzing the performance changes of the lubricant or working medium used in the monitored machine and the situation of wear particles carried, evaluates the working conditions of the machine, predicts faults, and determines the causes, types, and techniques of the faults. The economic benefits obtained from the implementation of oil fluid monitoring at home and abroad have promoted the development and improvement of this technology; usually, oil fluid monitoring can extend the oil change period of equipment or correctly select lubricants to achieve benefits. Most importantly, by promptly predicting potential faults, it can avoid catastrophic damage or reduce unnecessary maintenance of equipment in normal operation, thereby increasing output value and benefits.

[0003] For the detection of oil fluid, the common methods are manual spot inspection and regular sampling for laboratory testing. There is an over-reliance on manpower and there is an interval in regular detection, so lubrication problems cannot be detected in a timely manner. The prior art such as the online monitoring device for the lubricating oil of the gearbox of a wind turbine disclosed in CN214699134U, although this technical solution discloses the detection content such as oil quality, particle size, flow rate, moisture, etc., but this technical solution has the following disadvantages: (1) It is integrated with the oil circuit to be detected, which is not convenient for replacement and disassembly, and cannot be conveniently and quickly applied to the detection of oil circuits in other equipment, with low reuse rate; (2) Since each component in the detection device is connected to the pipeline, due to reasons such as installation, usage scenarios, and service life, if the connection position becomes loose without anyone watching and monitoring, it will cause the leakage of oil products, which is not easy to detect, and the existing monitoring device has no automatic alarm function; (3) In the existing oil circuit monitoring, a complex oil filtering mechanism is adopted, and the filtering action of the oil products in the oil circuit is not convenient and has low efficiency, and it cannot be integrated with the entire monitoring device in a box, resulting in poor space utilization and usage convenience; (4) The existing oil circuit monitoring device does not involve the monitoring of ferromagnetic particles, etc.; (5) Since it does not involve the use of different products and is only used in the oil circuits of fixed equipment, it does not involve the cleaning problem of the inside of the pipeline of the monitoring device, resulting in the problem that the inner wall of the pipeline in the monitoring device will cause the monitoring data to become invalid after long-term use. Therefore, in view of the above problems, this technical solution proposes an oil circuit monitoring device for a hydraulic circulation system. Summary of the Utility Model

[0004] The utility model provides an oil fluid monitoring device for a hydraulic circulation system. Aiming at the common hydraulic and circulation systems in industry, an oil product monitoring pipeline with an oil inlet pipe and an oil outlet pipe is arranged in a monitoring box. A flow regulating valve, a particle size pollution sensor, an oil fluid quality detection module, a flowmeter and a ferromagnetic particle detection module are arranged on the oil product monitoring pipeline, which are used for real-time detection of the flow velocity, particle size, quality and flow rate of the oil flowing through. The detection function is complete, convenient, fast and efficient. By respectively arranging an oil inlet joint and an oil outlet joint at the front ends of the oil inlet pipe and the oil outlet pipe, the oil circuit of the device to be detected can be quickly replaced and disassembled, and the oil circuit detection of different devices is applicable. By arranging an overflow oil receiving box at the bottom inside the monitoring box and placing a water immersion detector in the overflow oil receiving box, the oil leakage situation caused by the loosening of the connection position due to excessive pressure and other situations can be sensed in real time, and automatic alarm is realized through an alarm lamp and a buzzer, effectively realizing the oil leakage monitoring inside the detection box. By installing a Y-shaped pipeline filter on the monitoring oil pipeline, the Y-shaped pipeline filter is provided with a detachable structure with a filter cartridge and a sewage discharge valve. A filter element can be installed in the filter cartridge, and efficient filtration is carried out while the hydraulic oil is monitored. The filter structure is convenient for replacing the filter element, easy to maintain, and there is no need to separately set a large-volume filtering device, so the space utilization rate is high and the convenience is good. A ferromagnetic particle size sensor is also arranged in the pipeline, which can detect the ferromagnetic particle size. And a dirt collecting tank is installed in the detection oil circuit. After being disassembled from the oil circuit of the device, a cleaning agent can be introduced into the oil product monitoring pipeline to clean the oil in the pipeline, which is used for the oil circuit monitoring of the next device, and at the same time, the data accuracy and service life of the monitoring device can be improved. In summary, the problems in the background technology are solved.

[0005] To solve the above technical problems, the utility model is realized through the following technical solutions:

[0006] An oil fluid monitoring device for a hydraulic circulation system of the utility model includes a monitoring box, and the inside of the monitoring box is separated into an upper electrical unit and a lower oil circuit unit by a partition board;

[0007] The electrical unit includes a PLC controller, a power supply module for power supply, a buzzer connected to the PLC controller, an alarm lamp arranged on the top of the monitoring box and a display arranged on the opening and closing door outside the monitoring box;

[0008] The oil circuit unit includes an oil product monitoring pipeline, an oil inlet pipe and an oil outlet pipe which are respectively arranged at the side of the monitoring box and are connected to the head and tail of the oil product monitoring pipeline; on the oil product monitoring pipeline, a flow regulating valve, a particle size pollution sensor, a ferromagnetic particle size sensor, a Y-shaped pipeline filter, a gear pump, an oil product quality detection module and a flowmeter are sequentially installed from the oil inlet pipe to the oil outlet pipe; a water immersion detector is arranged at the bottom inside the monitoring box;

[0009] The water immersion detector, alarm lamp, flow regulating valve, gear pump, flowmeter, oil quality detection module, particle pollution sensor and ferromagnetic particle sensor are respectively connected to the PLC controller.

[0010] Further, the Y-shaped pipeline filter includes a Y-shaped connecting pipe, in which a connector is movably connected. A filter screen cylinder is provided at the front end of the connector, and the rear end of the connector is connected to a sewage discharge valve. The sewage discharge valve is connected to a sewage collection tank through a pipeline.

[0011] Further, a filter element is installed in the filter screen cylinder.

[0012] Further, an internal thread is provided at the end of the bifurcated pipe connected to the non-detection pipeline of the Y-shaped connecting pipe, and an external thread matching the internal thread is provided on the outer peripheral side of the connector. The connector is threadedly connected to the bifurcated pipe.

[0013] Further, the sewage discharge valve and the connector are threadedly connected through an internal and external thread structure.

[0014] Further, an overflow oil receiving box is provided at the bottom inside the monitoring box, and the water immersion detector is placed in the overflow oil receiving box.

[0015] Further, the front ends of the oil inlet pipe and the oil outlet pipe are respectively connected with an oil inlet joint and an oil outlet joint; the oil inlet joint and the oil outlet joint adopt any one or a combination of a threaded connection joint, a flange connection joint and a plug-in joint.

[0016] Further, the oil inlet joint and the oil outlet joint are respectively connected to the oil system of the device to be measured. The oil to be measured enters through the oil inlet pipe, and after passing through the oil monitoring pipeline, it flows back to the oil system of the device to be measured through the oil outlet pipe.

[0017] Further, a first valve and a second valve are respectively installed at the rear sides of the oil inlet joint and the oil outlet joint.

[0018] Further, the position on the surface of the opening and closing door facing the oil circuit unit is a transparent panel, and the transparent panel is made of glass or acrylic plastic.

[0019] The utility model has the following beneficial effects compared with the prior art:

[0020] (1) Simple structure, good convenience, and suitable for oil circuit monitoring of different devices: The monitoring box with an internal oil product monitoring pipeline and an oil inlet pipe and an oil outlet pipe at both ends can be quickly connected to and monitor the oil fluid system of the device to be measured in a portable manner. By respectively arranging an oil inlet joint and an oil outlet joint at the front ends of the oil inlet pipe and the oil outlet pipe, it can achieve quick replacement and disassembly with the oil circuit of the device to be detected, and is suitable for oil circuit detection of different devices; valves are arranged on the oil inlet pipe and the oil outlet pipe on the side of the monitoring box, which is convenient to install with the oil fluid system of the device to be measured, and can be independently removed after monitoring. The overall circulating structure of the oil product monitoring pipeline will not affect the normal operation of the device to be measured;

[0021] (2) Diverse functions: For common hydraulic and circulation systems in industry, an oil product monitoring pipeline with an oil inlet pipe and an oil outlet pipe is arranged in the monitoring box. A flow regulating valve, a particle pollution sensor, an oil quality detection module, a flowmeter, and a ferromagnetic particle detection module are arranged on the oil product monitoring pipeline to detect the flow rate, particle size, quality, and flow rate of the oil flowing through in real time. The detection functions are complete, convenient, fast, and efficient;

[0022] (3) Can automatically alarm for its own overflow: By arranging an overflow oil receiving box at the bottom inside the monitoring box and placing a water immersion detector in the overflow oil receiving box, it can sense in real time the oil leakage situation caused by the loosening of the connection position due to excessive pressure and other situations, and achieve automatic alarm through an alarm lamp and a buzzer, effectively realizing the oil leakage monitoring inside the detection box;

[0023] (4) High - efficiency and convenient filtration: By installing a Y - type pipeline filter on the monitoring oil circuit, the Y - type pipeline filter is provided with a detachable structure with a filter cartridge and a drain valve. A filter element can be installed inside the filter cartridge to perform high - efficiency filtration while monitoring the hydraulic oil. This filter structure is convenient for replacing the filter element, with convenient and efficient maintenance, and does not require a separately set large - volume filtering device, having high space utilization rate and good convenience;

[0024] (5) Easy to clean and high data accuracy: A ferromagnetic particle sensor is also arranged in the pipeline to detect the ferromagnetic particle size; and a dirt collection tank is installed in the detection oil circuit. After being disassembled from the oil circuit of the device, a cleaning agent can be introduced into the oil product monitoring pipeline to clean the oil in the pipeline, for use in monitoring the oil circuit of the next device, and at the same time can improve the data accuracy and service life of the monitoring device.

[0025] Of course, not necessarily all the above - mentioned advantages need to be achieved simultaneously for any product implementing the present utility model. Description of the Drawings

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the attached drawings required for the description of the embodiments. Obviously, the attached drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other attached drawings can be obtained based on these drawings.

[0027] Figure 1 This is the system framework diagram of an oil monitoring device for a hydraulic circulation system of the present invention;

[0028] Figure 2 This is the system topology diagram of an oil monitoring device for a hydraulic circulation system of the present invention;

[0029] Figure 3 External structure schematic diagram of an oil monitoring device for a hydraulic circulation system of the present invention;

[0030] Figure 4 Internal structure schematic diagram of an oil monitoring device for a hydraulic circulation system of the present invention;

[0031] Figure 5 For Figure 4 Structure and positional relationship diagram of the Y-type pipeline filter and the sewage discharge valve in

[0032] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0033] 1 - Monitoring box, 101 - Display, 102 - Buzzer, 103 - Power module, 2 - Oil product monitoring pipeline, 201 - Inlet pipe, 202 - Outlet pipe, 203 - Second valve, 204 - First valve, 205 - Inlet oil joint, 206 - Outlet oil joint, 3 - PLC controller, 4 - Flow regulating valve, 5 - Particle contamination sensor, 6 - Oil product quality detection module, 7 - Flowmeter, 8 - Y-type pipeline filter, 81 - Y-shaped connecting pipe, 811 - Internal thread, 82 - Connector, 821 - Filter sieve cylinder, 822 - External thread, 9 - Sewage discharge valve, 10 - Dirt collection tank, 11 - Gear pump, 12 - Water immersion detector, 13 - Ferromagnetic particle sensor, 14 - Overflow oil receiving box, 15 - Alarm lamp. Specific embodiments

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the attached drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0035] In the description of the present utility model, it should be understood that the terms "inner", "side part", "head and tail", "upper", "rear", "top", etc. indicating the orientation or position relationship are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0036] Lubricating oil is the "blood" of equipment, and lubrication management is the key point of equipment management; currently, the common industrial equipment lubrication management mainly relies on manual spot inspection and regular sampling laboratory testing. It is overly dependent on manpower and there is an interval for regular detection, making it impossible to detect lubrication problems in a timely manner. The existing online monitoring solutions are relatively broad, lacking consideration for specific applications and oil products, and the internal structure does not take into account the pre-requirements of the detection module for accuracy. To overcome the defects of the existing technology, the present utility model provides an oil fluid monitoring device for a hydraulic circulation system in the main circuit for common hydraulic and circulation systems in industry.

[0037] The present utility model is realized through the following technical solutions. Please refer to Figures 1-5 As shown in the figure, an oil fluid monitoring device for a hydraulic circulation system of the present utility model includes a monitoring box 1. The monitoring box 1 is divided into an upper electrical unit and a lower oil circuit unit by a partition. The whole monitoring box 1 is easy to carry and has a small space volume, which is convenient for application in the oil circuit systems of different equipment;

[0038] The electrical unit includes a PLC controller 3, a power supply module 103 for power supply, a buzzer 102 connected to the PLC controller 3, an alarm lamp 15 arranged on the top of the monitoring box 1, and a display 101 arranged on the opening and closing door outside the monitoring box 1; the PLC controller 3 can achieve efficient control of various electrical appliances and belongs to a general controller in the field of electrical control; the PLC controller is connected to cables and data lines through a circuit connection port arranged after passing through the side part or partition of the detection box 1. The display 101 is used to display the working and detection data of the flow regulating valve 4, the particle contamination sensor 5, the oil product quality detection module 6, the flowmeter 7, and the gear pump 11; the circuit connection port adopts a waterproof connector through which the cable and network cable pass for power supply and data transmission; the opening and closing door is installed on the monitoring box 1 by a hinge and can achieve a flipping action;

[0039] The monitoring box 1 is divided into an upper control part and a lower oil circuit part by a partition, realizing the separation of the control part and the oil circuit part. Even if there is a leak in the internal oil circuit, it will not affect the circuit, ensuring the safety of the whole device; the whole monitoring box 1 is made of stainless steel.

[0040] The oil circuit unit includes an oil quality monitoring pipeline 2, an inlet pipe 201 and an outlet pipe 202 which are arranged on the side of the monitoring box 1 and are connected to the head and tail of the oil quality monitoring pipeline 2 respectively; on the oil quality monitoring pipeline 2, a flow regulating valve 4, a particle contamination sensor 5, a ferromagnetic particle sensor 13, a Y-type pipeline filter 8, a gear pump 11, an oil quality detection module 6 and a flowmeter 7 are successively installed between the inlet pipe 201 and the outlet pipe 202; a water immersion detector 12 is arranged at the inner bottom of the monitoring box 1;

[0041] The water immersion detector 12, the alarm lamp 15, the flow regulating valve 4, the gear pump 11, the flowmeter 7, the oil quality detection module 6, the particle contamination sensor 5 and the ferromagnetic particle sensor 13 are respectively connected to the PLC controller 3.

[0042] The flow regulating valve 4 is used to control the flow rate of the oil flowing through the oil quality monitoring pipeline 2 to control the flow rate within the ideal flow rate range required for detection.

[0043] Among them, the particle contamination sensor 5 is used to detect the particle size of the oil flowing through the oil quality monitoring pipeline 2 in real time; in this specific embodiment, the particle contamination sensor 5 specifically adopts the HYDAC CS1000 model, which can detect the particle size of the oil in real time. In the hydraulic and circulation systems, the particle size is crucial. If the particle size does not meet the standard, it will cause wear of valves, pumps, etc. in the system, and even unplanned shutdown accidents.

[0044] Among them, the oil quality detection module 6 is used to detect the quality of the oil flowing through the oil quality monitoring pipeline 2 in real time. In this specific embodiment, the oil quality sensor 6 adopts the TAISEI T-ODS-102 type oil diagnostic instrument, which is an innovative sensor for monitoring the health status of the oil. Different from the electro-chemical sensors, by testing the color change (the value of RGB) in the oil, it quantifies the aging degree of the oil to help the equipment management personnel scientifically replace the lubricating oil.

[0045] Among them, the flowmeter 7 is used to detect the flow rate of the oil flowing through the oil quality monitoring pipeline 2 in real time, and the detection data is fed back to the particle detection module, and the particle detection module correspondingly makes a closed-loop adjustment of the detection parameters to ensure the detection accuracy; in this specific embodiment, the flowmeter 7 adopts the OMEGA FMG 70B model.

[0046] Among them, the ferromagnetic particle sensor 13 adopts the Poseidon DM 4500 type. During the operation of the equipment, worn metal particles will appear. By installing a ferromagnetic particle sensor and fitting the wear curve with ferromagnetic particles, the wear condition of the bearing can be judged. The Poseidon DM 4500 uses the principle of electromagnetic induction and is not affected by air bubbles in the oil. It is used to detect the size and quantity of ferromagnetic particles and non-ferromagnetic particles in the oil. By monitoring, measuring and analyzing the wear particles generated by mechanical devices, useful information such as the state of the working surface and whether it can withstand further wear can be obtained. The characteristic size of wear particles in the machine failure period is mostly between 20um and 200um, and this information is an important basis for giving full play to the working life of worn components. This sensor can monitor metal wear particles as small as 40um and non-ferromagnetic non-ferrous metal wear particles (mainly copper) of 150 microns, and can classify the wear particles by size, which helps to analyze different working states of the gearbox. Traditional metal particle monitoring can only give the particle count in different intervals. However, since the particles are not evenly distributed in the oil, the count will also fluctuate, and it is still difficult to intuitively guide on-site operators. This solution innovatively accumulates and statistics the wear particles in different intervals, judges abnormal wear from the early stage through wear concentration and cumulative wear amount, intuitively fits the wear curve, and gives diagnostic suggestions (such as low liquid level, pitting, spalling, etc.).

[0047] In the above implementation process, the oil pipeline sucks in the oil through the inlet pipe 201, and the oil then flows back to the device under test through the outlet pipe 202, completing the oil monitoring and the circulation of the oil at the same time, without affecting the normal operation of the device under test.

[0048] Among them, a first valve 204 and a second valve 203 are respectively installed on the inlet pipe 201 and the outlet pipe 202; it is conveniently installed with the oil system of the device under test and can be independently removed after the monitoring is completed.

[0049] Among them, the Y-shaped pipeline filter 8 includes a Y-shaped connecting pipe 81. A connecting head 82 is movably connected inside the Y-shaped connecting pipe 81. A filter screen cylinder 821 is provided at the front end of the connecting head 82. The rear end of the connecting head 82 is connected to a sewage discharge valve 9, and the sewage discharge valve 9 is connected to a dirt collection tank 10 through a pipeline.

[0050] Among them, a filter element is installed inside the filter screen cylinder 821.

[0051] Among them, an internal thread 811 is provided at the end of the bifurcated pipe connected to the non-detection pipeline of the Y-shaped connecting pipe 81. An external thread 822 that matches the internal thread 811 is provided on the outer peripheral side of the connecting head 82, and the connecting head 82 is threadedly connected to the bifurcated pipe.

[0052] The bypass detection loop oil circuit will be blocked by pollutants during long-term detection. Once blocked, it will not only affect the detection accuracy, but in severe cases, it will also pose risks of oil leakage and pipe explosion. Innovatively, a Y-type filter is installed to preliminarily filter the oil while having a dirt storage function and is equipped with a drain valve, which can conveniently discharge the filtered pollutants from the dirt storage tank regularly.

[0053] Among them, the pump model of the gear pump 11 is VIKDA CS020BB, which provides power for the bypass detection oil circuit circulation and can achieve the reverse cleaning function through the control command of the plc controller.

[0054] Among them, the drain valve 9 is threadedly connected to the connector 82 through an internal and external thread structure.

[0055] Among them, an overflow oil receiving box 14 is provided at the bottom inside the monitoring box 1, and the water immersion detector 12 is placed in the overflow oil receiving box 14; the water immersion detector 12 uses an XW-DC-01 optoelectronic water immersion sensor; the detection principle of the water immersion detector does not depend on the conductivity of the liquid, but detects the water leakage situation by the change in the refractive index of the contact surface between the probe and the air when the liquid contacts the probe. This principle makes the water immersion detector applicable not only to detecting water leakage but also to detecting oil leakage. Therefore, the optoelectronic water immersion sensor can be used for oil leakage detection, and almost all liquids can become its detection objects. When the oil leaks and accumulates in the overflow oil receiving box 14, an alarm can be generated, and the alarm is carried out through the buzzer and the alarm light, and the solenoid valve of the oil circuit is cut off by the controller to play a protective role.

[0056] Among them, the front ends of the inlet pipe 201 and the outlet pipe 202 are respectively connected with an inlet joint 205 and an outlet joint 206; the inlet joint 205 and the outlet joint 206 adopt any one or a combination of a threaded connection joint, a flange connection joint, and a plug-in joint.

[0057] Among them, the inlet joint 205 and the outlet joint 206 are respectively connected to the oil system of the device to be measured. The oil to be measured enters through the inlet pipe 201 and returns to the oil system of the device to be measured through the outlet pipe 202 after passing through the oil quality monitoring pipeline 2.

[0058] Among them, a first valve 204 and a second valve 203 are respectively installed behind the inlet joint 205 and the outlet joint 206.

[0059] Among them, the position of the transparent panel on the surface of the opening and closing door facing the oil circuit unit is a transparent panel, and the transparent panel is made of glass or acrylic plastic; in this specific embodiment, it is preferably a transparent acrylic plate; it is convenient to observe the internal situation.

[0060] Among them, a cooling fan is configured on the side of the monitoring box 1 to reduce the internal temperature of the box body and protect the components; the model is LF8025.

[0061] The preferred embodiments of the present utility model disclosed above are only used to help illustrate the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification in order to better explain the principle and practical application of the present utility model, so that those skilled in the relevant technical field can well understand and utilize the present utility model. The present utility model is only limited by the claims and their full scope and equivalents.

Claims

1. An oil monitoring device for a hydraulic circulation system, comprising a monitoring box (1), which is divided into an upper electrical unit and a lower oil circuit unit by a partition inside the monitoring box (1), and is characterized in that: The electrical unit includes a PLC controller (3), a power supply module (103) for power supply, a buzzer (102) connected to the PLC controller (3), an alarm lamp (15) arranged on the top of the monitoring box (1), and a display (101) arranged on the opening and closing door outside the monitoring box (1); The oil circuit unit includes an oil quality monitoring pipeline (2), an oil inlet pipe (201) and an oil outlet pipe (202) which are respectively arranged on the side of the monitoring box (1) and are connected to the head and tail of the oil quality monitoring pipeline (2); a flow regulating valve (4), a particle contamination sensor (5), a ferromagnetic particle sensor (13), a Y-shaped pipeline filter (8), a gear pump (11), an oil quality detection module (6) and a flowmeter (7) are successively installed on the oil quality monitoring pipeline (2) from the oil inlet pipe (201) to the oil outlet pipe (202); a water immersion detector (12) is arranged at the inner bottom of the monitoring box (1); The water immersion detector (12), the alarm lamp (15), the flow regulating valve (4), the gear pump (11), the flowmeter (7), the oil quality detection module (6), the particle contamination sensor (5) and the ferromagnetic particle sensor (13) are respectively connected to the PLC controller (3).

2. The oil monitoring device for a hydraulic circulation system according to claim 1, wherein The Y-shaped pipeline filter (8) includes a Y-shaped connecting pipe (81), a connector (82) is movably connected inside the Y-shaped connecting pipe (81), a filter sieve tube (821) is arranged at the front end of the connector (82), the rear end of the connector (82) is connected to a sewage discharge valve (9), and the sewage discharge valve (9) is connected to a dirt collection tank (10) through a pipeline.

3. The oil fluid monitoring device for a hydraulic circulation system according to claim 2, characterized in that, A filter element is installed inside the filter sieve tube (821).

4. The oil monitoring device for a hydraulic circulation system according to claim 2, characterized in that, Internal threads (811) are arranged at the end of the bifurcated pipe connected to the non-detection pipeline of the Y-shaped connecting pipe (81), external threads (822) matching the internal threads (811) are arranged on the outer peripheral side of the connector (82), and the connector (82) is threadedly connected to the bifurcated pipe.

5. The oil monitoring device for a hydraulic circulation system according to claim 2, wherein The sewage discharge valve (9) is threadedly connected to the connector (82) through an internal and external thread structure.

6. The oil monitoring device for a hydraulic circulation system according to claim 1, wherein An overflow oil receiving box (14) is arranged at the inner bottom of the monitoring box (1), and the water immersion detector (12) is placed inside the overflow oil receiving box (14).

7. The oil fluid monitoring device for a hydraulic circulation system according to claim 1, characterized in that, The front ends of the oil inlet pipe (201) and the oil outlet pipe (202) are respectively connected with an oil inlet joint (205) and an oil outlet joint (206); the oil inlet joint (205) and the oil outlet joint (206) adopt any one or a combination of a threaded connection joint, a flange connection joint and a plug-in joint.

8. The oil monitoring device for a hydraulic circulation system according to claim 7, characterized in that, The oil inlet joint (205) and the oil outlet joint (206) are respectively connected to the oil fluid system of the device to be measured, and the oil fluid to be measured enters through the oil inlet pipe (201), and after passing through the oil quality monitoring pipeline (2), it flows back to the oil fluid system of the device to be measured through the oil outlet pipe (202).

9. The oil monitoring device for a hydraulic circulation system according to claim 7, characterized in that, A first valve (204) and a second valve (203) are respectively installed behind the oil inlet joint (205) and the oil outlet joint (206).

10. The oil fluid monitoring device for a hydraulic circulation system according to claim 1, characterized in that, The position on the opening and closing door surface facing the oil circuit unit is a transparent panel, and the transparent panel is made of glass or acrylic plastic.

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