Marine oil-water separator oil level controller with active probe scraping function

Abstract

The utility model discloses a marine oil-water separator oil level controller with an active probe scraping function, which comprises a mounting seat, an electrode assembly, a driving assembly and an instrument assembly are arranged on the mounting seat, the electrode assembly and the driving assembly are fastened by bolts, and the electrode assembly, the driving assembly and the instrument assembly are connected by cables. The oil-water separator can deal with high-viscosity dirty oil water in a cabin, stubborn oil dirt attached to the surface of the probe is regularly removed in the mode that the flexible scraper actively scrapes the surface of the probe, and the liquid level feedback accuracy of the oil-water separator for the ship is improved. The automation degree is high, the starting time and duration of the scraping action can be customized according to requirements, and adaptive working modes can be customized according to various oil-water separation treatment processes; the device is reasonable in sealing structure, has pressure-resistant, dustproof and waterproof capabilities, and meets the use requirements of the oil-water separator for the ship; the device is simple in structure, reliable in operation, capable of meeting electromagnetic compatibility requirements, capable of stably outputting liquid level information of actual oil liquid, low in delay and capable of achieving fault self-detection and alarm functions.

Description

Technical Field

[0001] The utility model relates to an oil level controller device, in particular to an oil level controller for a marine oil-water separator with an active scraping probe function. Background Art

[0002] Daily oil pollution of ships mainly comes from bilge oily sewage. In 1978, the International Maritime Organization adopted the "73 / 78 Pollution Prevention Convention", which enforced the requirement for ships to install oil-water separators. Marine oil-water separators are used to treat all oily mixtures from the bilge, and are effective for all types of oil that may be carried on board. The oil level controller of the marine oil-water separator uses the characteristics of oil being non-conductive and tap water being conductive to feedback the oil level height in the marine oil-water separator through the on-off state between multiple probes. In recent years, the advancement of fuel energy technology and the use of biofuel oil, renewable oil, and coal-to-oil in marine fuel have made the composition of dirty oil in bilge water increasingly complex. The current oil-water separator oil level controller often fails due to stubborn oil stains adhering to the probe surface, and cannot timely feedback the actual oil level status in the oil-water separator, resulting in abnormal oil discharge of the marine oil-water separator, which brings great inconvenience to the crew's use and operation.

[0003] Therefore, a marine oil-water separation oil level controller that can work stably is needed to overcome the occurrence of the above problems. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a marine oil-water separator oil level controller that adopts the function of radially rotating a flexible scraper to actively scrape the probe surface. The mounting seat is provided with an electrode assembly, a drive assembly and an instrument assembly. The electrode assembly and the drive assembly are fastened by bolts, and the electrode assembly, the drive assembly and the instrument assembly are connected by cables. The function of the drive assembly is to scrape the electrode assembly to remove the stubborn oil stains attached to the surface of the electrode assembly.

[0005] Furthermore, the electrode assembly is provided with a limit baffle, a liquid level electrode, a flexible scraper, a scraper drive shaft, a follower magnetic coupling, an electrode fixing seat, a sealing O-ring, an active magnetic coupling and a wiring nut. An interference fit is adopted between the flexible scraper and the scraper drive shaft, and a sealant is used to fix the limit baffle, the liquid level electrode and the electrode fixing seat.

[0006] Furthermore, the driving assembly is provided with a driving shaft, a motor fixing seat and a steering gear, and the steering gear and the motor fixing seat are connected by screws.

[0007] Furthermore, the instrument assembly is provided with an instrument mounting seat, a control panel, an upper cover sealing ring, a stuffing box and an upper cover plate. The control panel and the instrument mounting seat are fixed with screws.

[0008] Furthermore, the control board is provided with a PCB circuit board, a power conversion module, an indicator light, an electrode socket, a steering gear power supply module, a drive control module and wiring terminals, etc.

[0009] The beneficial effects of the implementation of the utility model are as follows: the above-mentioned oil level controller for the marine oil-water separator can cope with the high-viscosity dirty oil and water in the cabin, and regularly removes the stubborn oil attached to the probe surface by actively scraping the probe surface with a flexible scraper, thereby improving the accuracy of the liquid level feedback of the marine oil-water separator. The overall device has a high degree of automation, and the start timing and duration of the scraping action can be customized according to user needs, and the working mode can be customized according to various oil-water separation treatment processes; the device has a reasonable sealing structure, has pressure resistance, dustproof and waterproof capabilities, and meets the use requirements of marine oil-water separators; the overall device has reliable operation, meets electromagnetic compatibility requirements, can stably output the actual oil level information, has low delay, and has fault self-detection and alarm functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a structural schematic diagram of an oil level controller for a marine oil-water separator of the utility model;

[0011] Figure 2 This is the system principle diagram of the oil level controller for the marine oil-water separator of the utility model;

[0012] Figure 3 This is a schematic diagram of the electrode assembly structure of the oil level controller for a marine oil-water separator of the utility model;

[0013] Figure 4 This is a schematic diagram of the flexible scraper structure of the oil level controller of the marine oil-water separator of the utility model;

[0014] Figure 5 This is a schematic diagram of the structure of the drive assembly of the oil level controller for a marine oil-water separator of the utility model;

[0015] Figure 6 This is a schematic diagram of the structure of the instrument assembly of the oil level controller of the marine oil-water separator of the utility model;

[0016] Figure 7 The utility model is a schematic diagram of the control panel structure of the oil level controller of the marine oil-water separator.

[0017] In the figure:

[0018] 1. Electrode assembly; 11. Limit baffle; 12. Liquid level electrode; 13. Flexible scraper; 14. Scraper drive shaft; 15. Follow-up magnetic coupling; 16. Electrode fixing seat; 17. Sealing O-ring; 18. Active magnetic coupling; 19. Wiring nut;

[0019] 2. Mounting seat;

[0020] 3. Driving assembly; 31. Driving shaft; 32. Motor fixing seat; 33. Servo;

[0021] 4. Instrument assembly; 41. Instrument fixing box; 42. Control panel; 43. Upper cover sealing rubber ring; 44. Cable stuffing box; 45. Upper cover; 421. PCB circuit board; 422. Power conversion module; 423. Indicator light; 424. Electrode socket; 425. Servo power supply module; 426. Drive control module; 427. Terminal block

[0022] 5. Cable DETAILED DESCRIPTION

[0023] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0024] See also Figure 1 The utility model discloses a marine separator oil level controller with an active scraping probe function, comprising a mounting base (2), wherein the mounting base (2) is provided with an electrode assembly (1), a drive assembly (3) and an instrument assembly (4), wherein the electrode assembly (1) and the drive assembly (3) are fastened by bolts, and the electrode assembly (1), the drive assembly (3) and the instrument assembly (4) are connected by cables.

[0025] See also Figure 3 The electrode assembly (1) is provided with a limit baffle (11), a liquid level electrode (12), a flexible scraper (13), a scraper drive shaft (14), a follow-up magnetic coupling (15), an electrode fixing seat (16), a sealing O-ring (17), an active magnetic coupling (18) and a wiring nut (19). An interference fit is adopted between the flexible scraper (13) and the scraper drive shaft (14), and a sealant is used to fix the limit baffle (11), the liquid level electrode (12) and the electrode fixing seat (16). The outer ring of the electrode assembly (1) has a sealing O-ring installation groove, and after the matching sealing O-ring (17) is assembled, the liquid in the pressure vessel can be prevented from penetrating into the inner cavity of the separator oil level controller; the active magnetic coupling (18) and the follow-up magnetic coupling (15) are assembled in the groove on the electrode fixing seat by relying on their own magnetic attraction, so as to realize the shaft transmission function while ensuring the sealing requirements of the product.

[0026] See also Figure 4 The flexible scraper (13) rotates in a circle with the transmission shaft (14), and the outer blades of the flexible scraper scrape the three liquid level electrodes (12), which can remove stubborn oil stains attached to the probe surface. The number and layout of the blades of the flexible scraper (13) are consistent with those of the liquid level electrodes (12), and the force is evenly applied, which has the advantages of good stability and long service life.

[0027] See also Figure 5 The drive assembly (3) is provided with a drive shaft (31), a motor fixing seat (32) and a steering gear (33). The steering gear (33) and the motor fixing seat (32) are connected by screws, and the drive shaft (31) and the output shaft of the steering gear (33) are fixedly connected.

[0028] See also Figure 6 The instrument assembly (4) is provided with an instrument mounting seat (41), a control panel (42), an upper cover sealing ring (43), a stuffing box (44) and an upper cover plate (45). The control panel (42) and the instrument mounting seat (41) are fixed by screws. The upper cover sealing ring (43) and the stuffing box (44) function to prevent external water mist and dust from entering the instrument assembly (4) to ensure the sealing requirements.

[0029] See also Figure 7 The control panel (42) is provided with a PCB circuit board (421), a power conversion module (422), an indicator light (423), an electrode socket (424), a steering gear power supply module (425), a drive control module (426), and a wiring terminal (427). The control panel (42) is used to feedback the oil level, drive the marine separator to discharge oil, send an alarm signal to the marine separator electrical control box, drive the steering gear (33) on the drive component (3) according to a predefined program, and drive the flexible scraper (13) to rotate and scrape the liquid level electrode (12), thereby removing stubborn oil stains attached to the probe surface.

[0030] Figure 2 The system principle diagram of the oil level controller of the marine oil-water separator of the utility model; the working principle of the marine separator oil level controller is specifically as follows: during the working process, the mounting seat is fixed on the top of the marine separator container, the electrode assembly is installed vertically downward, and the marine separator provides 24V DC power supply. The liquid in the marine separator container is oil and water. Due to the density difference between the two, a non-conductive oil layer will be formed on the top, and the lower layer is conductive water. There are 3 liquid level electrodes in total, which can be divided into long, medium and short according to their lengths, namely the common end, the oil layer high probe and the oil layer low probe. By monitoring the current value of the two probes, the height of the oil-water interface is determined. When the oil-water interface drops below the oil layer high probe, the two probes are both in an open circuit state with the common end, the controller sends an oil level high signal, and the marine separator triggers the oil discharge action; during the oil discharge process, the oil is discharged from the top pipe of the equipment, the oil-water interface gradually rises until the oil layer low probe, the two probes are both in a pass state with the common end, the controller sends an oil level low signal, and the marine separator stops the oil discharge action.

[0031] The power conversion module on the control board of the marine separator oil level controller can output +5V, -5V, 0V DC, which is modulated into 10Hz 5V AC by the drive control module and the photoelectric coupler on the PCB board to supply power to the probe. The electrode power supply uses AC signals to prevent the electroplating and electrolysis effects of the electrode, so that the electrode will not fail due to corrosion and fouling; the low-frequency safe voltage AC effectively reduces the generation of noise, has less signal interference, and has high stability.

[0032] The AC current generated after the electrode is turned on is converted into DC current by the rectifier bridge on the PCB board and then enters the input end of the low-speed photoelectric coupler. The output end of the low-speed photoelectric coupler provides a stable on-off signal to the control board in real time according to the on-off status between the probe common end, the oil layer high probe, and the oil layer low probe. The low-speed photoelectric coupler on the PCB board can reduce the instantaneous interference caused by the turbulence of the oil and water liquid in the equipment, and work with the delay program of the drive control module to improve the accuracy of the actual oil level status signal feedback.

[0033] The drive control module uses a single-chip microcontroller with an embedded crystal oscillator. It is the core logic control component of the marine separator oil level controller and can receive and process electrical signals. Its main functions include: logic control of the oil discharge signal of the marine separator oil level controller; working program and logic control of the steering gear; receiving the on-off state signal fed back by the probe; judging the working condition selection signal of the scraping probe action; outputting the probe AC ​​power supply drive signal; outputting the power supply drive signal of the steering gear; outputting the oil discharge status indicator light signal; outputting the abnormal working indicator light signal.

[0034] The hardware wiring part of the steering gear of the marine separator oil level controller is divided into two categories: power line and signal line. The power line is connected to the steering gear power supply module, and the signal line is connected to the drive control module. The function of the steering gear power supply module is to receive the signal of the drive control module and output high-power DC to the steering gear; the drive control module sends servo pulses to the steering gear signal line according to the selection of the scraping working program, drives the steering gear to reciprocate within the range of 0° to 180°, and realizes the action of the scraping probe through the joint action of the magnetic coupling and the transmission shaft.

[0035] There are multiple scraping working programs available in the drive control module program, supporting scraping at oil drain start, intermittent scraping during the whole working condition, and 10s / 30s single scraping duration. The scraping action working program is selected by the toggle switch on the control panel and can be switched with power on. When the servo is working, the drive control module monitors the working condition of the servo in real time. When the working is abnormal, the servo fault light is always on. The alarm signal can be sent to the PLC as needed by the user.

[0036] So far, the technical solution of the utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings, but it is easy for those skilled in the art to understand that the protection scope of the utility model is obviously not limited to these specific embodiments. Without departing from the principle of the utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the utility model.

Claims

1. An oil level controller for a marine oil-water separator with an active scraping probe function, comprising a mounting seat (2), characterized in that: The mounting seat (2) is provided with an electrode assembly (1), a drive assembly (3) and an instrument assembly (4); the electrode assembly (1) and the drive assembly (3) are fastened by bolts, and the electrode assembly (1), the drive assembly (3) and the instrument assembly (4) are connected by a cable (5); the drive assembly (3) is used to scrape the electrode assembly (1) to remove stubborn oil stains attached to the surface of the electrode assembly (1); The electrode assembly (1) is provided with a limit baffle (11), a liquid level electrode (12), a flexible scraper (13), a scraper drive shaft (14), a follower magnetic coupling (15), an electrode fixing seat (16), a sealing O-ring (17), an active magnetic coupling (18) and a wiring nut (19); an interference fit is adopted between the flexible scraper (13) and the scraper drive shaft (14), and a sealant is used to fix the limit baffle (11), the liquid level electrode (12) and the electrode fixing seat (16).

2. The marine oil-water separator oil level controller with active scraping probe function according to claim 1 is characterized in that: The driving assembly (3) is provided with a driving shaft (31), a motor fixing seat (32) and a steering gear (33); the steering gear (33) and the motor fixing seat (32) are connected by screws.

3. The marine oil-water separator oil level controller with active scraping probe function according to claim 1 is characterized in that: The instrument assembly (4) is provided with an instrument mounting seat (41), a control panel (42), an upper cover sealing ring (43), a stuffing box (44) and an upper cover plate (45); the control panel (42) and the instrument mounting seat (41) are fixed by screws.

4. The marine oil-water separator oil level controller with active scraping probe function according to claim 3 is characterized in that: The control panel (42) is provided with a PCB circuit board (421), a power conversion module (422), an indicator light (423), an electrode socket (424), a steering gear power supply module (425), a drive control module (426) and a wiring terminal (427).

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