Online detection system for oil quality of lubricating oil

Abstract

The utility model relates to a lubricating oil quality on-line detection system, which comprises an oil tank, on-line detection pipelines and a plurality of oil quality detection devices, two on-line detection pipelines are respectively arranged on two sides of the oil tank, each on-line detection pipeline is provided with a control valve, a detection pipe section and an oil pump, the detection pipe section is provided with a plurality of self-sealing joints, and the oil quality detection devices are arranged on the oil tank. And the connecting end of each oil quality detection device is mounted on the corresponding self-sealing joint. The device can be used for online detection of the lubricating oil quality of a turboset, can also evaluate different oil quality detection device combinations, and is more flexible to use.

Description

Technical Field

[0001] The utility model relates to the field of lubricating oil detection, in particular to an online lubricating oil quality detection system. Background Art

[0002] The lubricating oil in the lubricating oil pipeline of the steam turbine unit needs to be tested regularly to obtain relevant information about the lubricating oil itself and the mechanical status of the steam turbine equipment in a timely manner. As long as there is a major abnormality in the equipment, it will generally be reflected in the changes in various indicators of the oil product. However, the existing technology mainly relies on the laboratory manual regular offline testing to monitor the lubricating oil quality and regularly test items such as moisture, particle size, acid value, etc.

[0003] With the development of technology, various intelligent detection devices have been gradually applied to the online detection of lubricating oil quality in steam turbine units. For example, the Chinese utility model patent with publication number CN208297505U discloses an online monitoring system for lubricating oil quality in steam turbines. The system connects the lubricating oil pipeline to the real-time oil analyzer through a monitoring loop, and the real-time oil analyzer is connected to the monitoring unit through a cable. The system can collect the moisture, particle size, acid value and other parameters of the lubricating oil online and synchronously according to the set cycle, and upload them to the monitoring main computer. When the lubricating oil quality does not meet the standard, it can send an alarm signal in time, thereby improving the maintenance management level of the steam turbine and ensuring the safe and reliable operation of the steam turbine equipment.

[0004] However, since there are many detection parameters for steam turbine lubricating oil, the prior art often combines multiple detection devices to achieve comprehensive detection of oil quality. In addition, there are more and more types of intelligent devices for lubricating oil quality detection on the market, and the detection accuracy of detection devices produced by different manufacturers is also different. How to choose a suitable oil quality detection device for lubricating oil quality detection is also a problem that needs to be considered. However, the research and development direction of the prior art is mainly on how to perform more accurate or convenient detection of lubricating oil quality, but does not consider how to evaluate whether the detection accuracy of detection devices from different manufacturers meets the detection requirements of steam turbine units. In actual production, it is usually directly connected to the lubricating oil pipeline of the unit. When it is found that it does not meet the detection requirements of the unit, it is disassembled and replaced. The operation is time-consuming and labor-intensive, and sometimes the unit also needs to be shut down to complete the disassembly and replacement operation. Utility Model Content

[0005] The utility model aims to provide an online detection system for lubricating oil quality, which can be used for online detection of lubricating oil quality of steam turbine units and can evaluate different combinations of oil quality detection devices, making it more flexible to use.

[0006] The purpose of this utility model is achieved through the following technical solutions:

[0007] A lubricating oil quality online detection system comprises an oil tank, an online detection pipeline and a plurality of oil quality detection devices, wherein two online detection pipelines are arranged on both sides of the oil tank, and each online detection pipeline is provided with a control valve, a detection pipe section and an oil pump, the detection pipe section is provided with a plurality of self-sealing joints, and the connecting ends of the various oil quality detection devices are respectively installed on the corresponding self-sealing joints.

[0008] The online detection pipeline includes an oil inlet pipe section, a detection pipe section and an oil outlet pipe section which are connected in sequence, wherein the oil inlet pipe section and the oil outlet pipe section are both connected to the oil tank, and a control valve is provided on the oil inlet pipe section, and an oil pump is provided on the oil outlet pipe section.

[0009] The oil inlet pipe section and the oil outlet pipe section are both provided with connecting elbows at one end away from the oil tank, and both ends of the detection pipe section are provided with connecting end pipes, and the ends of the connecting elbows are connected to the connecting end pipes on the corresponding side through connecting threaded sleeves.

[0010] The detection pipe section is provided with a plurality of joint branch pipes, and each joint branch pipe is provided with a self-sealing joint.

[0011] The advantages and positive effects of the utility model are:

[0012] 1. The utility model can be used for online detection of lubricating oil quality of steam turbine units, and can evaluate the combination of different oil quality detection devices, making it more flexible to use.

[0013] 2. Both ends of the detection pipe section of the utility model are connected to the connecting elbows on both sides through connecting threaded sleeves, which is convenient for disassembly and assembly. At the same time, detection pipe sections of different diameters can be replaced according to actual needs, thereby further improving the flexibility of use of the utility model.

[0014] 3. When the online detection pipeline on either side of the utility model is used for online detection of the lubricating oil quality of the steam turbine unit, the online detection pipeline on the other side can be in a closed state. If a new oil quality detection device needs to be evaluated and tested, the new oil quality detection device can be installed on the pipeline on the other side, and the detection results of the pipelines on both sides can be uploaded to the control system for comparison at the same time. This evaluation method is not only easy to install, but also will not affect the normal online detection operation of the unit's lubricating oil circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] Figure 2 for Figure 1 The enlarged schematic diagram of the detection pipe section.

[0017] Figure 3 for Figure 1 The enlarged schematic diagram of the connecting elbow.

[0018] Figure 4 for Figure 3 Schematic diagram of the state when the middle connecting elbow is separated from the connecting end pipe on the detection pipe section.

[0019] Figure 5 This is a schematic diagram of the self-sealing joint structure used in one embodiment of the utility model.

[0020] Among them, 1 is an oil tank, 2 is an online detection pipeline, 3 is a detection pipe section, 301 is a first real-time detector, 302 is a micro-water detector, 303 is a first fluid property detector, 304 is a second fluid property detector, 305 is a second real-time detector, 306 is a self-sealing joint, 307 is a joint branch pipe, 308 is a connecting end pipe, 4 is an oil inlet pipe section, 401 is a control valve, 5 is an oil outlet pipe section, 501 is an oil pump, 6 is a connecting elbow, and 7 is a connecting threaded sleeve. DETAILED DESCRIPTION

[0021] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0022] like Figures 1 to 5 As shown, the utility model includes an oil tank 1, an online detection pipeline 2 and a plurality of oil quality detection devices, wherein two online detection pipelines 2 are arranged on both sides of the oil tank 1, and each online detection pipeline 2 is provided with a detection pipe section 3, and the detection pipe section 3 is provided with a plurality of self-sealing joints 306, and the connecting ends of each oil quality detection device are respectively installed on the corresponding self-sealing joints 306.

[0023] like Figure 1 As shown, the online detection pipeline 2 includes an oil inlet pipe section 4, a detection pipe section 3 and an oil outlet pipe section 5 connected in sequence, wherein the oil inlet pipe section 4 is provided with a control valve 401 for controlling the on-off of the pipeline, and the oil outlet pipe section 5 is provided with an oil pump 501 for driving the flow of lubricating oil, and the oil inlet pipe section 4 and the oil outlet pipe section 5 are both connected to the oil tank 1. The control valve 401 can be an automatic control valve capable of controlling flow rate or a manual control valve according to specific needs, and the control valve 401 is a well-known technology in the art and is a commercially available product.

[0024] like Figure 1 As shown, the end of the oil inlet pipe section 4 away from the oil tank 1 and the end of the oil outlet pipe section 5 away from the oil tank 1 are both provided with a connecting elbow 6, and both ends of the detection pipe section 3 are provided with a connecting end pipe 308. In one embodiment of the utility model, the end of the connecting elbow 6 can be fixedly connected to the connecting end pipe 308 on the corresponding side by welding or the like. Figures 3-4As shown, in another embodiment of the present invention, the end of the connecting elbow 6 can also be connected to the connecting end pipe 308 on the corresponding side through a connecting threaded sleeve 7, such as Figure 1 As shown, the diameter of the detection pipe section 3 is usually larger than the diameters of the oil inlet pipe section 4 and the oil outlet pipe section 5 to ensure that the internal oil volume can meet the detection needs. However, since the number of oil quality detection devices connected to the detection pipe section 3 may vary, at most 5 to 6 oil quality detection devices may be connected, and at least only one oil quality detection device may be connected (for example, the oil analyzer in the CN208297505U patent can simultaneously detect six parameters such as viscosity, density, dielectric constant, temperature, particle size, and water content). Therefore, the two ends of the detection pipe section 3 in this embodiment are threadedly connected to the connecting elbows 6 on both sides using the connecting threaded sleeve 7 to facilitate the replacement of pipe sections of different diameters according to different situations. The end of the connecting elbow 6 and the connecting end pipe 308 are both provided with threaded sections that can be threadedly connected to the inner wall of the connecting threaded sleeve 7. When connected, Figure 3 As shown, the end of the connecting elbow 6 and the head of the connecting end pipe 308 are both threadedly inserted into the connecting threaded sleeve 7, and as shown Figure 4 As shown, during disassembly, the operator only needs to screw the connecting threaded sleeve 7 upward or downward to disengage it from the connecting end pipe 308 and then replace the pipe section. During replacement, the control valve 401 needs to be in a closed state and the oil in the pipeline needs to be drained through the oil pump 501.

[0025] like Figure 2 As shown, in this embodiment, the detection pipe section 3 is provided with a plurality of joint branches 307, and each joint branch 307 is provided with a self-sealing joint 306. The connection port of the oil quality detection device is directly connected to the corresponding self-sealing joint 306 to realize oil quality detection. When the joint branch 307 does not need to be connected to the oil quality detection device, the self-sealing joint 306 can automatically block the joint branch 307. The number of the joint branches 307 can be designed according to actual needs.

[0026] The self-sealing joint 306 is a well-known technology in the art. For example, the self-sealing joint structure in the patent with the authorization announcement number CN219658796U can be adopted. Figure 5 As shown, it includes an inner joint 3061 and an outer joint 3062, the inner joint 3061 is arranged on the corresponding joint branch pipe 307, the outer joint 3062 is connected to the corresponding oil quality detection device, the inner joint 3061 is provided with a first elastic sealing valve, the outer joint 3062 is provided with a second elastic sealing film and an inner insert tube and other structures, when the outer joint 3062 is pulled off from the inner joint 3061, the first elastic sealing valve is reset to close the adapter under the elastic action. The self-sealing joint 306 can also adopt other suitable commercial products.

[0027] The working principle of the utility model is:

[0028] The utility model can be used to evaluate whether different combinations of oil quality detection devices meet the requirements, and an application example is listed below for specific explanation.

[0029] like Figure 1 As shown, in this application example, the online detection pipeline 2 on one side of the oil tank 1 is provided with a first real-time detector 301, a micro-water detector 302 and a first fluid property detector 303, and the online detection pipeline 2 on the other side is provided with a second fluid property detector 304 and a second real-time detector 305, wherein the first fluid property detector 303 and the second fluid property detector 304 are both detectors capable of testing the viscosity, dielectric constant, temperature and density of the lubricating oil, and their model is FPS2800B12C4, and the manufacturer is TE of the United States, and the first real-time detector 301 on one side of the pipeline tests the particle size of the lubricating oil, the micro-water detector 302 and the first fluid property detector 303. The detector 302 tests the water content of the lubricating oil, and the second real-time detector 305 on the other side of the pipeline can test the particle size and water content of the lubricating oil at the same time. The model of the first real-time detector 301 is IFJ-3, and the model of the micro-water detector 302 is IFW-2A, both of which are manufactured by INZOC. The model of the second real-time detector 305 is OLPC-IDMWT, and the manufacturer is YUNZET. This application example conducts real-time detection and comparison through the online test pipeline 2 on both sides, so as to evaluate which device combination of the two brands INZOC and YUNZET is more suitable for the unit detection needs.

[0030] The utility model can also be used for online detection of lubricating oil quality of steam turbine units, wherein the two sides of the oil tank 1 can be directly connected to the lubricating oil pipeline of the steam turbine unit through pipelines. During normal online detection operation, the control valve 401 on the online detection pipeline 2 on either side is opened, and the oil pump 501 is started to make the lubricating oil flow through the oil inlet pipe section 4, the detection pipe section 3 and the oil outlet pipe section 5 in sequence. The oil quality detection device on the detection pipe section 3 on this side performs real-time online detection of the lubricating oil and uploads the detection results to the control system. The control system can use the monitoring host computer and other devices in CN208297505U, and the alarm thresholds of various parameters are pre-set in the monitoring host computer. The received parameters are compared with the alarm thresholds. If normal, only the parameter data are displayed. If out of tolerance, an alarm signal is sent to the real-time oil analyzer to cause it to sound an alarm. The detection parameter range of the lubricating oil in this application example is as follows:

[0031] Viscosity measurement range: 0-75CP;

[0032] Density measurement range: 0.65-1.5gm / cc;

[0033] Temperature measurement range: -40-150℃;

[0034] Dielectric constant measurement range: 1.0-6.0 (dk);

[0035] Particle size detection range: 1um~400um;

[0036] Moisture measurement range: 0-100PPM;

[0037] When the online detection pipeline 2 on one side is undergoing real-time detection, the control valve 401 and the oil pump 501 on the online detection pipeline 2 on the other side are in a closed state and do not participate in the detection. However, if a new oil quality detection device needs to be evaluated, the connecting end of the new oil quality detection device is first connected to the corresponding connecting end pipe 308 on the detection pipe section 3 on this side. After the connection is completed, the control valve 401 and the oil pump 501 on the online detection pipeline 2 on the other side are started to realize oil quality detection, and the detection results of the pipelines on both sides can be uploaded to the control system in real time and compared, so as to evaluate whether the new oil quality detection device meets the needs. This evaluation method will not affect the normal online detection operation of the unit lubrication oil circuit, and it is also more convenient for disassembly and assembly.

[0038] In addition, when one side of the online detection pipeline 2 is being cleaned and maintained, the other side of the online detection pipeline 2 is started to meet the normal online detection needs of the unit.

Claims

1. An online lubricating oil quality detection system, characterized in that: The invention comprises an oil tank (1), an online detection pipeline (2) and a plurality of oil quality detection devices, wherein two online detection pipelines (2) are arranged on both sides of the oil tank (1), and each online detection pipeline (2) is provided with a control valve (401), a detection pipe section (3) and an oil pump (501), the detection pipe section (3) is provided with a plurality of self-sealing joints (306), and the connection ends of the various oil quality detection devices are respectively installed on the corresponding self-sealing joints (306).

2. The lubricating oil quality online detection system according to claim 1 is characterized in that: The online detection pipeline (2) comprises an oil inlet pipe section (4), a detection pipe section (3) and an oil outlet pipe section (5) which are connected in sequence, wherein the oil inlet pipe section (4) and the oil outlet pipe section (5) are both connected to the oil tank (1), and a control valve (401) is provided on the oil inlet pipe section (4), and an oil pump (501) is provided on the oil outlet pipe section (5).

3. The lubricating oil quality online detection system according to claim 2 is characterized in that: The end of the oil inlet pipe section (4) away from the oil tank (1) and the end of the oil outlet pipe section (5) away from the oil tank (1) are both provided with a connecting elbow (6), and both ends of the detection pipe section (3) are provided with connecting end pipes (308), and the ends of the connecting elbows (6) are connected to the connecting end pipes (308) on the corresponding side through connecting threaded sleeves (7).

4. The lubricating oil quality online detection system according to claim 1 is characterized in that: The detection pipe section (3) is provided with a plurality of joint branch pipes (307), and each joint branch pipe (307) is provided with a self-sealing joint (306).

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