阅读说明：本技术 一种燃油水分在线监测装置 (Fuel water on-line monitoring device ) 是由 徐定海 马守军 姜志刚 于 2020-05-22 设计创作，主要内容包括：本发明公开了一种燃油水分在线监测装置,可在线准确测定被测油液的含水量变化,实时显示被测油液含水量值(ppm)和不同时段燃油系统水分变化曲线,可辅助操作人员判定是否需要更换油液,即可节约油料,又能预测设备故障；该装置结构简单,实用,其结构特点使测量传感器的维修与更换更加方便。不论是新建被测设备或原有被测设备,都能非常容易且经济的在其上面安装；可广泛应用于船舶及其它行业。它不仅结构简单,使用方便,而且响应快,价格低。水分含量监测迅速、准确。结构简单,安装、维修方便；所采用的传感器无活动部件,免维护,柱塞探头,三通连接,具有简洁的工业在线安装形式。(The invention discloses a fuel water online monitoring device, which can accurately measure the water content change of measured oil on line, display the water content value (ppm) of the measured oil and the water change curve of a fuel system at different time intervals in real time, assist an operator to judge whether the oil needs to be replaced, save oil and predict equipment failure; the device simple structure, it is practical, its structural feature makes measuring transducer's maintenance and change more convenient. No matter newly built tested equipment or original tested equipment, the device can be very easily and economically installed on the device; can be widely applied to ships and other industries. It is simple in structure, convenient in use, quick in response and low in price. The moisture content monitoring is rapid and accurate. The structure is simple, and the installation and the maintenance are convenient; the adopted sensor has no movable part, is free from maintenance, is connected with a plunger probe and a tee joint, and has a simple industrial online installation form.)

1. The fuel oil moisture online monitoring device is characterized by comprising a moisture sensor (2), a sensor mounting seat (6) and a control system; the sensor mounting seat (6) is arranged between the flange opening (7) of the oil conservator and the sampling ball valve (3); the moisture sensor (2) is arranged on the sensor mounting seat (6) and used for measuring the dielectric constant of the fuel oil and sending the dielectric constant to the control system; and the control system obtains the content of the moisture in the fuel oil according to the dielectric constant.

2. The fuel oil moisture online monitoring device according to claim 1, characterized in that the control system: receiving the dielectric constant of the pure oil of the oil to be measured by the water sensor (2), then measuring the dielectric constant of the measured oil with different water contents, and calculating the dielectric constant ratio of the measured oil with different water contents and the pure oil to obtain the corresponding relation between the water content and the dielectric constant ratio; during on-line measurement, the water sensor (2) detects the dielectric constant of oil in the oil conservator (1) in real time and sends the dielectric constant to the control system, and the control system calculates the ratio of the dielectric constant measured by the water sensor (2) to the dielectric constant of pure oil and compares the ratio with the corresponding relation obtained by previous calibration to obtain the water content of the current oil.

3. The on-line fuel water monitoring device as claimed in claim 1, wherein the control system adopts a liquid crystal screen to display and record relevant data of water content in the fuel system in real time, and provides a water change curve of the fuel system at different time periods.

4. The fuel oil water online monitoring device according to claim 1, wherein the control system adopts an RS-485 digital signal output interface for connecting with a peripheral data processing system.

5. The fuel water online monitoring device according to claim 1, characterized in that the sensor mounting seat (6) is cylindrical with a plane gap, an inner hole (6-3) is arranged in the middle, and a threaded hole (6-2) is processed at the gap of the outer circle for mounting the water sensor (2); a probe of the moisture sensor (2) extends into the inner hole (6-3); the inner hole (6-3) is a U-shaped hole, and the height and the width of a part for accommodating the probe are larger than those of the probe; one side of the inner hole (6-3) where the sampling ball valve (3) is installed is designed into a round hole matched with the joint of the sampling ball valve (3);

the sensor mounting seat (6) is provided with a through hole which is used as a mounting hole (6-1) of a flange opening (7) of the oil conservator.

6. The fuel water online monitoring device as claimed in claim 1, characterized in that the sensor mounting seat (6) is made of stainless steel.

Technical Field

The invention belongs to the technical field of ship turbine engineering, and particularly relates to an on-line fuel water monitoring device.

Background

The fuel oil system is a key component of a ship power system, and the health state (temperature, water content, pollution condition and the like) of the fuel oil system is also one of the most important indexes of the overall performance of a ship in the navigation process of the ship. In recent years, accidents that a diesel engine breaks down or is damaged due to water entering of a fuel system of a ship frequently occur, so that not only is great economic loss caused, but also the aviation safety of the ship is influenced.

The monitoring and disposal of the ship fuel system at the present stage are divided into online real-time monitoring, laboratory offline detection and manual timing oil sample extraction visual observation and judgment. Off-line detection not only takes time for analysis, but also may cause the change of the micro-water content in the oil in the collection and transportation of the oil sample, thereby causing the inconsistency of the measurement result with the actual state. The fuel system also delays the disposal time if a large amount of water enters. The online detection can realize the real-time monitoring of the water in the oil.

Disclosure of Invention

In view of the above, the present invention provides an online fuel moisture monitoring device, which can detect moisture content quickly and accurately, and is convenient to install and maintain.

A fuel moisture online monitoring device comprises a moisture sensor (2), a sensor mounting seat (6) and a control system; the sensor mounting seat (6) is arranged between the flange opening (7) of the oil conservator and the sampling ball valve (3); the moisture sensor (2) is arranged on the sensor mounting seat (6) and used for measuring the dielectric constant of the fuel oil and sending the dielectric constant to the control system; and the control system obtains the content of the moisture in the fuel oil according to the dielectric constant.

Preferably, the control system: receiving the dielectric constant of the pure oil of the oil to be measured by the water sensor (2), then measuring the dielectric constant of the measured oil with different water contents, and calculating the dielectric constant ratio of the measured oil with different water contents and the pure oil to obtain the corresponding relation between the water content and the dielectric constant ratio; during on-line measurement, the water sensor (2) detects the dielectric constant of oil in the oil conservator (1) in real time and sends the dielectric constant to the control system, and the control system calculates the ratio of the dielectric constant measured by the water sensor (2) to the dielectric constant of pure oil and compares the ratio with the corresponding relation obtained by previous calibration to obtain the water content of the current oil.

Furthermore, the control system adopts a liquid crystal screen to display and record the related data of the moisture content in the fuel system in real time, and provides the moisture change curves of the fuel system at different time periods.

Preferably, the control system adopts an RS-485 digital signal output interface for connecting with a peripheral data processing system.

Furthermore, the sensor mounting seat (6) is cylindrical with a plane gap, an inner hole (6-3) is formed in the middle of the sensor mounting seat, and a threaded hole (6-2) is formed in the excircle gap and used for mounting the moisture sensor (2); a probe of the moisture sensor (2) extends into the inner hole (6-3); the inner hole (6-3) is a U-shaped hole, and the height and the width of a part for accommodating the probe are larger than those of the probe; one side of the inner hole (6-3) where the sampling ball valve (3) is installed is designed into a round hole matched with the joint of the sampling ball valve (3);

the sensor mounting seat (6) is provided with a through hole which is used as a mounting hole (6-1) of a flange opening (7) of the oil conservator.

Preferably, the sensor mounting seat (6) is made of stainless steel.

The invention has the following beneficial effects:

the fuel water online monitoring device can accurately measure the water content change of the measured oil on line, display the water content value (ppm) of the measured oil and the water change curve of the fuel system at different time intervals in real time, assist an operator to judge whether the oil needs to be replaced, save oil and predict equipment failure; the device simple structure, it is practical, its structural feature makes measuring transducer's maintenance and change more convenient. No matter new tested equipment or original tested equipment, the device can be installed on the device very easily and economically.

Can be widely applied to ships and other industries. It is simple in structure, convenient in use, quick in response and low in price. The moisture content monitoring is rapid and accurate. Simple structure, and convenient installation and maintenance.

The adopted sensor has no movable part, is free from maintenance, is connected with a plunger probe and a tee joint, and has a simple industrial online installation form.

Drawings

FIG. 1 is a schematic structural diagram of a fuel water online monitoring device of the present invention;

FIG. 2(a) is a schematic view showing an assembly relationship between a moisture sensor and a sensor mounting seat, and FIG. 2(b) is a schematic view showing the sensor mounting seat; FIG. 2(c) is a top view of the sensor mount; FIG. 2(d) is a cross-sectional view of the sensor mount;

the device comprises a base, a sensor, a water content sensor, a sampling ball valve, a sampling port, a measured medium, a sensor mounting seat, a mounting hole, a threaded hole, an inner hole and a flange port, wherein the base comprises 1-an oil conservator, 2-a water content sensor, 3-a sampling ball valve, 4-a sampling port, 5-a measured medium, 6-a sensor mounting seat, 6-1-a mounting hole.

Detailed Description

The invention is described in detail below by way of example with reference to the accompanying drawings.

The fuel water online monitoring device disclosed by the invention comprises a water sensor 2, a sensor mounting seat 6 and a control system, as shown in figure 1; a sampling ball valve 3 is arranged at a flange opening 7 of the existing oil conservator 1, a sensor mounting seat 6 is arranged between the sampling ball valve and the existing oil conservator, and a moisture sensor 2 is arranged on the sensor mounting seat 6.

The device is not used for additionally constructing or attaching pipelines on a fuel system (an oil conservator). Only the sampling ball valve 3 of the oil conservator 1 needs to be disassembled, the sensor mounting seat 6 is mounted on the flange opening 7 of the oil conservator, and then the sampling ball valve 3 is mounted on the sensor mounting seat 6. The problem that the conventional sensor is difficult and complicated to install is solved, and the sensor can be arranged at the position closest to the center of a measured medium in the oil conservator. The device is flexible and convenient to install, simple in structure, low in cost, wide in application range and easy to popularize.

The moisture sensor 2 can measure the dielectric constant of the fuel in the conservator 1. Because the dielectric constant of water is different from that of oil phase, when the oil to be measured is mixed with water, the dielectric constant of the mixed oil can be obviously changed due to a small amount of water. Firstly, the moisture sensor 2 is calibrated, namely: the water sensor 2 measures the dielectric constant of the pure oil of the oil to be measured, then measures the dielectric constant of the oil to be measured with different water contents, and calculates the dielectric constant ratio of the oil to be measured with different water contents and the pure oil to obtain the corresponding relation between the water content and the dielectric constant ratio. During on-line measurement, the water sensor 2 detects the dielectric constant of oil in the oil conservator 1 in real time, after the signal is collected by the control system, the dielectric constant measured by the water sensor 2 and the dielectric constant of pure oil are compared with each other to obtain the corresponding relation obtained by calibration before, and the water content of the current oil is obtained. The method has the advantages of high sensitivity, high precision and accurate measurement value, and ensures the stability and reliability of the fuel oil moisture detection.

The moisture sensor 2 and the control system (control box) adopt split design; the control system adopts a liquid crystal screen to display and record related data of the moisture content in the fuel system (oil conservator) in real time, provides a moisture change curve of the fuel system at different time periods, guides workers to master the working condition and the health state of equipment in time, and sets an alarm function.

The control system adopts an RS-485 digital signal output interface and can be connected with peripheral data processing systems such as an upper computer and the like.

As shown in fig. 2(a) - (d), the sensor mounting seat 6 is made of stainless steel, and is cylindrical with a plane notch, firm and corrosion-resistant. An inner hole 6-3 is formed in the middle of the sensor mounting seat 6, and a threaded hole 6-2 is formed in the excircle gap and used for mounting the moisture sensor 2; the probe of the moisture sensor 2 extends into the inner hole 6-3; the height and width of the part of the inner hole 6-3 for accommodating the probe are larger than those of the probe, as shown in fig. 2(a) and (b), the U-shaped hole is formed, enough oil liquid flowing space is reserved at the bottom of the U-shaped hole, and the U-shaped hole can enable the sensor probe to contact more measured media as much as possible, so that the sensor measurement value is more accurate. One side of the inner hole 6-3 for installing the sampling ball valve 3 is designed into a round hole matched with the joint of the sampling ball valve 3, so that the installation of the sampling ball valve and the sampling ball valve is convenient.

The sensor mounting seat 6 is provided with 4 through holes, and the through holes are mounting holes 6-1 of a flange opening 7 of the oil conservator. The size of the mounting hole 6-1 adopts the corresponding specification and size of a universal flange. The universality is good, and the installation is simple and convenient. The sensor mounting seat threaded interface 6-2 can be set according to the mounting interface specification of the sensor. The planar notch on the outer cylinder of the mounting seat 6 enables the installation of the moisture sensor to be more convenient, and the sealing performance is better. The sensor mounting base 6 can be independently mounted on a fuel system (oil conservator) in advance. Due to maintenance or replacement of the moisture sensor 2, the sensor mounting seat 6 does not need to be detached during installation and detachment, so that the maintenance and replacement of the moisture sensor 2 are easier and more convenient.

In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.