A lubricating oil decoloring filter device

Abstract

The utility model relates to lubricating oil regeneration treatment technical field, concretely discloses a kind of lubricating oil decolorization filter device, including the tank body of bottom taper, the detachable sealing cover is equipped in the tank body top, the tank body bottom center is equipped with the blowdown valve's blowdown, the upper and lower of the tank body outer wall are respectively equipped with decoloring agent adding port and with the liquid inlet of one-way valve, the other end of the liquid inlet is connected with feed pump, the output end of the feed pump is connected with external oil source, the sealing cover bottom is detachably with the conical filter screen of big lower small, the inside of the lower end of the conical filter screen is equipped with the shaft seat with bearing in middle part, the bearing is equipped with the drive shaft that penetrates sealing cover, the utility model is through the integration design of external scraper and axial backwashing oil circuit, realizes the real-time cleaning and directional backflushing of filter screen outer wall impurities in lubricating oil decolorization filtration process, significantly improves filtration efficiency, reduces maintenance cost, and solves the technical problem that traditional device filter screen is easy to block.

Description

Technical Field

[0001] This utility model relates to the field of lubricating oil regeneration technology, and specifically discloses a lubricating oil decolorization and filtration device. Background Technology

[0002] Lubricating oil plays a crucial role in industrial production, transportation, and other fields, directly affecting the operating efficiency and service life of equipment. However, during long-term use, lubricating oil deteriorates due to oxidation, thermal decomposition, and the introduction of contaminants, manifesting as darkening of color, changes in viscosity, increased acid value, and the formation of impurities such as gums and asphaltenes. These changes not only lead to a decline in the lubricating performance of the lubricating oil but may also exacerbate equipment wear, clog oil passages, and increase equipment maintenance costs and the risk of failure.

[0003] To achieve the recycling of lubricating oil, decolorization and filtration are the core processing steps. Current lubricating oil treatment equipment has many shortcomings: First, the method of adding additives (such as decolorizing agents and adsorbents) is unreasonable, and manual single-feeding is often used, which easily leads to uneven mixing and affects the decolorization effect; Second, the filter screen is easily clogged by impurities, and traditional equipment lacks an efficient self-cleaning mechanism, requiring frequent shutdowns for disassembly and cleaning, which reduces the processing efficiency.

[0004] To address the aforementioned issues, this device aims to provide a highly efficient, stable, and easy-to-maintain lubricating oil decolorization and filtration solution by optimizing the additive dispensing structure, integrating a filter self-cleaning system, and simplifying the disassembly and assembly design. Utility Model Content

[0005] This invention proposes a lubricating oil decolorization and filtration device. Through the synergistic action of various components, it achieves continuous and efficient decolorization and filtration of lubricating oil. It has a self-cleaning function to reduce clogging, and is easy to operate and maintain. It can improve the processing quality and efficiency and reduce costs.

[0006] This utility model is implemented as follows: a lubricating oil decolorizing and filtering device includes a tank with a conical bottom, a removable sealing cap at the top of the tank, and a drain port with a drain valve at the center of the bottom of the tank. The outer wall of the tank has a decolorizing agent addition port at the top and a liquid inlet with a one-way valve at the bottom. The other end of the liquid inlet is connected to a feed pump, the output end of which is connected to an external oil source. A conical filter screen, wider at the top and narrower at the bottom, is removable at the bottom of the sealing cap. The lower end of the conical filter screen has a bearing seat in the middle, and a drive shaft penetrating the sealing cap is located within the bearing. A turbine agitator located below the conical filter screen is fixedly connected to the lower end of the drive shaft. A bracket is fixedly connected to the outer wall of the drive shaft above the turbine agitator. A scraper attached to the outer wall of the conical filter screen is fixed on the bracket. An axial channel extending downward is opened at the upper end of the drive shaft. A spray hole communicating with the axial channel is opened on the side wall of the drive shaft, and the spray hole faces the outer wall of the conical filter screen. A delivery pump, an oil suction pipe, a three-way valve, and a drive mechanism for rotating the drive shaft are provided on the sealing cover. The lower end of the oil suction pipe extends through the sealing cover to the lower part of the conical filter screen. The input end of the delivery pump is connected to the upper end of the oil suction pipe, and the output end is connected to the three-way valve. The first outlet of the three-way valve is connected to an oil collection device, and the second outlet is connected to the axial channel inside the drive shaft via a rotary joint.

[0007] As a preferred embodiment of the lubricating oil decolorization and filtration device of this utility model, the driving mechanism includes a motor disposed on the sealing cover, a conical driving wheel disposed at the output end of the motor, and a conical driven wheel fixed to the outer wall of the drive shaft and meshing with the conical driving wheel.

[0008] As a preferred embodiment of the lubricating oil decolorization and filtration device of this utility model, the upper end of the conical filter screen is provided with a ring-shaped connecting sleeve, and at least three threaded rods are vertically fixed at the bottom of the sealing cover. All the threaded rods pass through the connecting sleeve and are fixed by a locking nut.

[0009] As a preferred embodiment of the lubricating oil decolorization and filtration device of this utility model, the other end of the scraper is fixed with a guide slider, the connecting sleeve is provided with an annular guide groove, and the guide slider is located in the annular guide groove; the scraper is made of polytetrafluoroethylene, and the gap between its inner surface and the outer wall of the conical filter screen is less than 0.2mm.

[0010] As a preferred embodiment of the lubricating oil decolorization and filtration device of this utility model, the spray holes are distributed in at least three groups along the drive shaft axial direction, with four spray holes evenly distributed in each group circumferentially.

[0011] As a preferred embodiment of the lubricating oil decolorization and filtration device of this utility model, the cone angle of the cone-shaped filter screen is 55°-65° and the mesh diameter is 50-100μm.

[0012] As a preferred embodiment of the lubricating oil decolorization and filtration device of this utility model, the tank is provided with a transparent observation window.

[0013] The beneficial effects of this utility model are:

[0014] 1. The special design of the conical filter screen, including the appropriate cone angle and mesh size, provides a large filtration area and suitable filtration accuracy, which can efficiently filter impurities in lubricating oil and improve product quality.

[0015] 2. The drive shaft drives the scraper and spray nozzles to spray cleaning fluid to clean the filter screen, effectively preventing filter screen blockage, extending filter screen service life, reducing maintenance workload and downtime, and improving production efficiency; the turbine agitator can fully mix lubricating oil and decolorizing agent, ensuring decolorization effect and improving the treatment quality of lubricating oil. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2 This is a cross-sectional structural diagram of the tank body of this utility model.

[0019] Figure 3 This utility model Figure 2 A magnified structural diagram of point A in the diagram.

[0020] Figure 4 This is a schematic diagram of the structure of the guide slider and the annular guide groove of this utility model.

[0021] The markings in the diagram are: 1. Tank body; 2. Sealing cap; 3. Drain outlet; 4. Decolorizing agent addition port; 5. Liquid inlet; 6. Feed pump; 7. Conical filter screen; 8. Bearing; 9. Shaft seat; 10. Drive shaft; 11. Turbine agitator; 12. Support; 13. Scraper; 14. Axial channel; 15. Spray nozzle; 16. Transfer pump; 17. Oil suction pipe; 18. Three-way valve; 19. Rotary joint; 20. Motor; 21. Conical drive wheel; 22. Conical driven wheel; 23. Connecting sleeve; 24. Threaded rod; 25. Locking nut; 26. Guide slider; 27. Annular guide groove; 28. Transparent observation window. Detailed Implementation

[0022] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0023] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0024] Please see Figure 1-4 A lubricating oil decolorizing and filtering device includes a tank 1 with a conical bottom, a removable sealing cap 2 at the top of the tank 1, and a drain port 3 with a drain valve at the center of the bottom of the tank 1. A decolorizing agent addition port 4 and a liquid inlet 5 with a one-way valve are respectively located on the upper and lower sides of the outer wall of the tank 1. The other end of the liquid inlet 5 is connected to a feed pump 6, and the output end of the feed pump 6 is connected to an external oil source. A conical filter screen 7, wider at the top and narrower at the bottom, is removable at the bottom of the sealing cap 2. A bearing 8 is located inside the lower end of the conical filter screen 7, and a drive shaft 10 penetrating the sealing cap 2 is located inside the bearing 8. A turbine agitator 11 is fixedly connected to the lower end of the drive shaft 10, located below the conical filter screen 7. A fixture is fixed above the turbine agitator 11 to the outer wall of the drive shaft 10. The support 12 is connected to the cone filter screen 7 and a scraper 13 is fixed on the support 12 and attached to the outer wall of the cone filter screen 7. The upper end of the drive shaft 10 is provided with a downwardly extending axial channel 14. The side wall of the drive shaft 10 is provided with a spray hole 15 that communicates with the axial channel 14 and faces the outer wall of the cone filter screen 7. The sealing cover 2 is provided with a delivery pump 16, an oil suction pipe 17, a three-way valve 18 and a drive mechanism that drives the drive shaft 10 to rotate. The lower end of the oil suction pipe 17 extends through the sealing cover 2 to the lower part of the cone filter screen 7. The input end of the delivery pump 16 is connected to the upper end of the oil suction pipe 17 and the output end is connected to the three-way valve 18. The first outlet of the three-way valve 18 is connected to the oil collection device, and the second outlet is connected to the axial channel 14 inside the drive shaft 10 through a rotary joint 19.

[0025] In this embodiment: the lubricating oil to be treated enters the conical tank 1 at the bottom through the inlet 5 with a one-way valve under the action of the feed pump 6. The one-way valve prevents backflow of the oil, and the conical tank 1 facilitates the settling of impurities. At the same time, additives can be added through the decolorizing agent addition port 4 on the outer wall of the tank 1 to facilitate mixing of the additives with the oil. The drive mechanism drives the drive shaft 10 to rotate, and the turbine agitator 11 at the lower end of the drive shaft 10 rotates accordingly to stir the oil and additives in the tank, promoting a thorough mixing reaction to achieve decolorization. The mixed oil flows upward and passes through the conical filter 7 at the bottom of the sealing cover 2, where the filter traps impurities to complete the process. Filtration: Clean oil enters the filter screen; the delivery pump 16 draws the clean oil from the filter screen through the oil extraction pipe 17 and delivers it to the oil collection device through the first outlet of the three-way valve 18; when backwashing is required, the state of the three-way valve 18 is adjusted, and part of the clean oil enters the axial channel 14 of the drive shaft 10 through the second outlet and the rotary joint 19, and then sprays out from the spray hole 15 on the side wall of the drive shaft 10 to rinse the outer wall of the conical filter screen 7; at the same time, the drive shaft 10 drives the scraper 13 on the bracket 12 to rotate, and the scraper 13 adheres to the outer wall of the filter screen to scrape off impurities. The impurities settle to the bottom of the tank 1 with the liquid and can finally be discharged through the drain port 3 with the drain valve.

[0026] It should be noted that: a liquid level sensor is installed at the bottom of the sealing cover 2, and a PLC controller is installed outside the tank body 1; the liquid level sensor and the PLC controller are electrically connected to monitor the liquid level height on the outer wall of the conical filter screen 7, and control the switching of the three-way valve 18 in the backwashing mode; the PLC controller is also connected to the motor 20 and the delivery pump 16 to realize automatic start-stop and mode switching; through the linkage between the liquid level sensor and the PLC controller, the backwashing mode is accurately triggered and automatically operated, further reducing the need for manual intervention. The liquid level sensor monitors the liquid level on the outer wall of the conical filter screen 7 in real time. When the liquid level drops to the set height (e.g., 80% of the outer wall of the filter screen is exposed), the PLC controller automatically switches the three-way valve 18 to the backwashing mode and adjusts the speed of the motor 20 to the preset value (e.g., 100-200 rpm); the liquid level sensor and the PLC controller are not shown in the attached drawings. The PLC controller is preset to start once every 2 hours of operation.

[0027] The turbine mixer 11 rotates at 200-500 rpm to ensure uniform mixing and prevent oil splashing.

[0028] Decolorizing agent added at port 4 (such as adsorbent, bleaching clay, etc.).

[0029] As a technical optimization of this utility model, the drive mechanism includes a motor 20 disposed on the sealing cover 2, a conical drive wheel 21 disposed at the output end of the motor 20, and a conical driven wheel 22 fixed to the outer wall of the drive shaft 10 and meshing with the conical drive wheel 21.

[0030] In this embodiment, the motor 20 transmits power to the drive shaft 10 through the meshing of the conical driving wheel 21 and the driven wheel. The transmission efficiency is high and the structure is compact, providing stable power output for the stirring and scraping actions.

[0031] As a technical optimization of this utility model, the upper end of the conical filter screen 7 is provided with a ring-shaped connecting sleeve 23, and at least three threaded rods 24 are vertically fixed at the bottom of the sealing cover 2. All threaded rods 24 pass through the connecting sleeve 23 and are fixed by locking nuts 25.

[0032] In this embodiment, quick assembly and disassembly are achieved through the threaded rod 24 and the locking nut 25, which simplifies the cleaning and replacement process of the filter screen, reduces maintenance difficulty, and improves the maintainability of the device.

[0033] As a technical optimization of this utility model, a guide slider 26 is fixed at the other end of the scraper 13, and an annular guide groove 27 is provided on the connecting sleeve 23, with the guide slider 26 located in the annular guide groove 27; the scraper 13 is made of polytetrafluoroethylene, and the gap between its inner surface and the outer wall of the conical filter screen 7 is less than 0.2mm.

[0034] In this embodiment: the cooperation between the guide slider 26 and the annular guide groove 27 improves the operational stability. The polytetrafluoroethylene material and the micro-gap design take into account both cleaning effect and filter protection, extend the service life of the filter, and enhance the practicality of the solution.

[0035] As a technical optimization of this utility model, the nozzles 15 are distributed in at least three groups along the axial direction of the drive shaft 10, with four nozzles 15 evenly distributed in each group in the circumferential direction.

[0036] In this embodiment, four spray holes 15 are evenly distributed around the perimeter, which can ensure that the cleaning liquid evenly covers the outer wall of the filter screen, improve the rinsing effect, avoid filter screen clogging caused by local impurities, and optimize the self-cleaning function.

[0037] As a technical optimization of this utility model, the cone angle of the cone-shaped filter 7 is 55°-65° and the mesh diameter is 50-100μm.

[0038] In this embodiment: while ensuring filtration accuracy, the filtration area is maximized, filtration efficiency and resistance are balanced, so that the device can be adapted to the processing needs of lubricating oils of different viscosities.

[0039] As a technical optimization of this utility model, a transparent observation window 28 is provided on the tank body 1.

[0040] In this embodiment: the transparent observation window 28 allows for easy and intuitive viewing of the oil inside the tank 1; the transparent observation window 28 is made of oil-resistant and pressure-resistant tempered glass or polycarbonate.

[0041] Working principle and usage process of this utility model:

[0042] The feed pump 6 is started, and the lubricating oil to be treated from the outside enters the tank 1 through the inlet 5 with a one-way valve under the power of the feed pump 6. At the same time, an appropriate amount of decolorizing agent and other additives are added into the tank 1 through the decolorizing agent addition port 4 on the upper part of the outer wall of the tank 1. The motor 20 in the drive mechanism is started, and the conical drive wheel 21 at the output end of the motor 20 rotates, driving the conical driven wheel 22 on the outer wall of the drive shaft 10 to rotate, thereby causing the drive shaft 10 to rotate. The turbine agitator 11 at the lower end of the drive shaft 10 rotates together with the drive shaft 10, which fully stirs the lubricating oil and additives in the tank 1, so that the two are evenly mixed and the decolorization reaction is promoted. Under the stirring action of the turbine agitator 11, the mixed oil and additives are stirred. The lubricating oil flows upwards, passing through the conical filter 7 at the bottom of the sealing cover 2. The conical filter 7, with its 50-100μm pore size, traps solid impurities in the lubricating oil, allowing the clean lubricating oil to enter. At this time, the first outlet control valve of the three-way valve 18 is opened, and the second outlet control valve is closed. The lower end of the oil extraction pipe 17 extends to the bottom of the conical filter 7, extracting the filtered clean oil. The transfer pump 16 provides power, and the clean oil is transported to the oil collection device through the first outlet of the three-way valve 18. The operator can observe the lubricating oil level in the tank 1 in real time through the transparent window on the tank 1. When backwashing the conical filter 7, it is necessary to ensure that more than 80% of the outer wall of the conical filter 7 is covered. The area exposed above the liquid surface is controlled by closing the first outlet control valve and opening the second outlet control valve. A portion of the clean oil drawn by the transfer pump 16 enters the axial channel 14 inside the drive shaft 10 through the second outlet of the three-way valve 18 and the rotary joint 19, and is then sprayed out from the nozzle 15 on the side wall of the drive shaft 10. The nozzle 15 faces the outer wall of the conical filter screen 7, rinsing the conical filter screen 7. Simultaneously, the drive shaft 10 continues to rotate, driving the bracket 12 fixed to its outer wall and the scraper 13 on the bracket 12 to rotate. The scraper 13 adheres to the outer wall of the conical filter screen 7, scraping off impurities attached to the filter screen. The guide slider 26 at the other end of the scraper 13 moves within the annular guide groove 27 on the outer wall of the shaft seat 9, ensuring the scraper 13 rotates smoothly. The backwashing process is stable; the impurities washed and scraped off settle to the bottom of tank 1 with the liquid; after backwashing continues for a period of time, the second outlet control valve is closed and the first outlet control valve is opened. After the device resumes normal operation, the conical filter 7 continues to filter the lubricating oil. The clean lubricating oil is continuously transported to the oil collection device for collection through the first outlet of the oil extraction pipe 17 and the three-way valve 18 under the action of the transfer pump 16; when the device has been running for a period of time and a lot of impurities and waste residue have settled at the bottom of tank 1, the feed pump 6 and the transfer pump 16 are closed to stop the feeding and filtration operations; the drain valve at the center of the bottom of tank 1 is opened, and the settled impurities and waste residue are discharged through the drain port 3; after the drain is completed, the drain valve is closed and the motor 20 is turned off, and the entire process ends. If the lubricating oil needs to be treated again later, the above steps can be repeated.

[0043] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0044] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A lubricating oil decolorization and filtration device, characterized in that, The tank (1) has a conical bottom and a removable sealing cap (2) on the top. A drain port (3) with a drain valve is located at the center of the bottom of the tank (1). The tank (1) has a decolorizing agent addition port (4) on the top and a liquid inlet (5) with a one-way valve on the bottom. The other end of the liquid inlet (5) is connected to a feed pump (6), and the output end of the feed pump (6) is connected to an external oil source. A conical filter (7) with a larger top and smaller bottom is removable at the bottom of the sealing cap (2). The lower end of the conical filter (7) has a bearing seat (9) with a bearing (8) in the middle. The bearing (8) has a drive shaft (10) that passes through the sealing cap (2). A turbine agitator (11) located below the conical filter (7) is fixed to the lower end of the drive shaft (10). A bracket (12) fixed to the outer wall of the drive shaft (10) is located above the turbine agitator (11). The bracket (12) is fixed with a scraper (13) attached to the outer wall of the conical filter (7); the upper end of the drive shaft (10) is provided with a downwardly extending axial channel (14), and the side wall of the drive shaft (10) is provided with a spray hole (15) communicating with the axial channel (14), and the spray hole (15) faces the outer wall of the conical filter (7); the sealing cover (2) is provided with a delivery pump (16), an oil sucker pipe (17), a three-way valve (18) and a drive mechanism that drives the drive shaft (10) to rotate; the lower end of the oil sucker pipe (17) extends through the sealing cover (2) to the lower part of the conical filter (7), the input end of the delivery pump (16) is connected to the upper end of the oil sucker pipe (17), and the output end is connected to the three-way valve (18). The first outlet of the three-way valve (18) is connected to the oil collection device, and the second outlet is connected to the axial channel (14) inside the drive shaft (10) via a rotary joint (19).

2. The lubricating oil decolorization and filtration device according to claim 1, characterized in that: The drive mechanism includes a motor (20) mounted on the sealing cover (2), a conical drive wheel (21) mounted on the output end of the motor (20), and a conical driven wheel (22) fixed to the outer wall of the drive shaft (10) and meshing with the conical drive wheel (21).

3. The lubricating oil decolorization and filtration device according to claim 1, characterized in that: The upper end of the conical filter (7) is provided with a ring-shaped connecting sleeve (23), and the bottom of the sealing cover (2) is vertically fixed with at least three threaded rods (24). All the threaded rods (24) pass through the connecting sleeve (23) and are fixed by a locking nut (25).

4. The lubricating oil decolorization and filtration device according to claim 3, characterized in that: The other end of the scraper (13) is fixed with a guide slider (26), and the connecting sleeve (23) is provided with an annular guide groove (27). The guide slider (26) is located in the annular guide groove (27). The scraper (13) is made of polytetrafluoroethylene, and the gap between its inner surface and the outer wall of the conical filter screen (7) is less than 0.2 mm.

5. The lubricating oil decolorization and filtration device according to claim 1, characterized in that: The nozzles (15) are distributed in at least three groups along the drive shaft (10), with four nozzles (15) evenly distributed in each group in the circumferential direction.

6. The lubricating oil decolorization and filtration device according to claim 1, characterized in that: The cone angle of the cone filter (7) is 55°-65° and the mesh size is 50-100μm.

7. The lubricating oil decolorization and filtration device according to claim 1, characterized in that: The tank (1) is provided with a transparent observation window (28).

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