A device for separating oil impurities from recyclable lubricating oil

Abstract

The utility model provides a kind of oil impurity separation device of recyclable lubricating oil, belong to lubricating oil recycling processing technical field.The device adopts the multistage filter structure from top to bottom, including charging initial filter structure, middle layer filter structure and oil storage depot;Charging initial filter structure removes large particle impurities in lubricating oil by initial screen filter layer;Middle layer filter structure carries out fine filtration to lubricating oil after initial filtration by secondary screen filter layer, separates out clean lubricating oil that can be recycled and used;Oil storage depot is used to collect final product;Particularly, vacuum pump is installed on the outer wall of oil storage depot, and the filtration efficiency and speed are significantly improved by applying negative pressure to accelerate lubricating oil to penetrate filter layer.The utility model is compact in structure, and flange connection is used between each filter cartridge, which facilitates disassembly, cleaning and maintenance, and realizes efficient and convenient recycling and purification of lubricating oil.

Description

Technical Field

[0001] This utility model relates to the field of lubricating oil filtration technology, and in particular to an oil impurity separation device for recyclable lubricating oil. Background Technology

[0002] Lubricating oil plays a crucial role in reducing friction, cooling, cleaning, and preventing rust during the operation of mechanical equipment. However, during use, lubricating oil inevitably mixes with solid impurities such as metal shavings, dust, and carbon deposits. These impurities accelerate the oxidation and deterioration of the lubricating oil, reduce its lubricating performance, and may lead to abnormal wear of equipment parts, shortening the equipment's service life.

[0003] To conserve resources and reduce costs, recycling and reusing used lubricating oil has become a common practice. Filtration is one of the most crucial steps in lubricating oil recycling, aiming to remove solid impurities and restore its cleanliness. Currently, most common filtration devices are single-stage filtration or simple screen filtration, which suffer from insufficient filtration accuracy and low efficiency. For waste oil containing a large number of or larger particulate impurities, the screen is prone to clogging, resulting in slow filtration speeds and even requiring frequent shutdowns for cleaning, severely impacting recycling efficiency.

[0004] In addition, traditional filtration devices are mostly one-piece or have a structure that is inconvenient to disassemble. When the internal filter components need to be replaced or cleaned, the operation is cumbersome and the maintenance cost is high. Utility Model Content

[0005] The purpose of this invention is to provide an oil impurity separation device for recyclable lubricating oil, so as to solve the technical problems mentioned in the background.

[0006] To achieve the above objectives, this utility model provides the following technical solution: An oil impurity separation device for recyclable lubricating oil includes a primary filter structure, a middle filter structure, and an oil storage tank arranged sequentially from top to bottom. The primary filter structure is installed at the top of the middle filter structure and includes a primary filter cylinder, a lower primary filter flange, and a primary screening filter layer. The top of the primary filter cylinder has a conical feed port, the lower primary filter flange is located at the bottom port of the primary filter cylinder, and the primary screening filter layer is installed inside the primary filter cylinder for filtering lubricating oil to remove large particulate impurities. The middle filter structure includes a secondary filter cylinder body, a secondary filter upper flange, and a secondary filter lower flange. The secondary filter cylinder body is arranged opposite to the primary filter cylinder and has a secondary screening filter layer installed inside. The secondary filter upper flange and the secondary filter lower flange are respectively located at the upper and lower ends of the secondary filter cylinder body. The secondary filter upper flange is detachably connected to the primary filter lower flange, and the secondary filter lower flange is connected to the top of the oil storage tank. The secondary screening filter layer is used to filter the lubricating oil after primary screening to separate recyclable lubricating oil. The oil storage tank is used to collect and store lubricating oil, and a vacuum pump is installed on its outer wall.

[0007] Based on the above technical solutions, this utility model also provides the following optional technical solutions: In one alternative: the primary filtration layer has a double-layer filter screen, the upper filter screen has a pore size of 200μm and a thickness of 0.5mm, and the lower filter screen has a feeding primary filtration structure with a pore size of 100μm and a thickness of 1mm.

[0008] In one alternative embodiment: the secondary sieve filter layer includes a single-layer filter screen, filter cotton, and a double-layer filter membrane. The single-layer filter screen has a pore size of 50 μm and a thickness of 1 mm. The filter cotton has a pore size of not less than 5 μm and a thickness of 1 cm. The double-layer filter membrane has pore sizes of 50 μm and 10 μm, respectively.

[0009] In one alternative: the outer diameter of the lower flange of the primary filter is larger than the outer diameter of the bottom port of the primary filter cylinder, and it is fastened together with the upper flange of the secondary filter by multiple snap-fit ​​bolts.

[0010] In one alternative: the top port of the oil storage tank is provided with a stainless steel flange, an oil guide pipe is provided in the middle of the stainless steel flange and the bottom of the oil guide pipe extends into the inside of the stainless steel flange, and the stainless steel flange of the tank and the lower flange of the secondary filter are fastened together by hook and bolts.

[0011] In one alternative: a pressure relief valve, a pressure gauge, and an observation window are also provided on the outer wall of the oil storage tank. The pressure relief valve and pressure gauge are located near the top of the outer wall of the oil storage tank, and the observation window is located in the middle of the side wall of the oil storage tank.

[0012] In one alternative: the bottom of the oil storage tank is conical, and an oil drain pipe is located at its center, with a flow meter and an oil drain valve installed on the drain pipe.

[0013] By adopting the above technical solution, this utility model has the following beneficial effects: This invention achieves tiered filtration from coarse to fine filtration by incorporating a primary filter structure and a secondary filter structure. The primary filter layer intercepts large particles, effectively preventing rapid clogging of the secondary fine filter layer; the secondary filter layer is responsible for deep purification, separating high-purity recyclable lubricating oil. This design rationally distributes the load of each filter layer, ensuring stable and efficient overall filtration. A vacuum pump installed on the outer wall of the oil storage tank creates a negative pressure environment within the filtration system. This negative pressure, acting as a powerful driving force, actively "draws" lubricating oil to quickly penetrate each filter layer, with a particularly significant acceleration effect for high-viscosity lubricating oil. This completely changes the slow state of traditional gravity-based filtration, greatly improving processing efficiency. Attached Figure Description

[0014] 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. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the oil impurity separation device for recyclable lubricating oil in this utility model.

[0016] Figure 2 This is a schematic diagram of the internal structure of the feeding and primary filter in this utility model.

[0017] Figure 3 This is a top view of the feeding and primary filter structure in this utility model.

[0018] Figure 4 This is a schematic diagram of the internal structure of the middle layer filter in this utility model.

[0019] Figure 5 This is a top view of the middle layer filter structure in this utility model.

[0020] Figure 6 This is a schematic diagram of the oil storage tank structure in this utility model.

[0021] Figure reference numerals: 100 for primary filter structure, 110 for primary filter cylinder, 120 for primary filter lower flange, 130 for primary sieve filter layer, 200 for intermediate filter structure, 210 for secondary filter cylinder, 220 for secondary filter upper flange, 230 for secondary filter lower flange, 240 for secondary sieve filter layer, 300 for oil storage tank, 310 for tank body stainless steel flange, 320 for oil guide pipe, 400 for snap bolt, 500 for pressure relief valve, 600 for oil drain pipe, 610 for flow meter, 620 for oil drain valve, 700 for vacuum pump, and 800 for observation window. Detailed Implementation

[0022] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] The left, right, up, and down positions of the various components shown in the attached diagram are just one arrangement method; the specific positions should be set according to specific needs.

[0024] In one embodiment, such as Figures 1-5As shown, an oil impurity separation device for recyclable lubricating oil includes a primary filter structure 100, a middle filter structure 200, and an oil storage tank 300 arranged sequentially from top to bottom. The primary filter structure 100 is installed at the top of the middle filter structure 200 and includes a primary filter cylinder 110, a primary filter lower flange 120, and a primary sieve filter layer 130. The primary filter cylinder 110 has a conical feed port at its top, the primary filter lower flange 120 is located at the bottom port of the primary filter cylinder 110, and the primary sieve filter layer 130 is installed inside the primary filter cylinder 110 for filtering the lubricating oil to remove large particulate impurities. The middle filter structure 200 includes a secondary filter cylinder 2. 10. Secondary filter upper flange 220 and secondary filter lower flange 230. The secondary filter cylinder 210 is arranged opposite to the primary filter cylinder 110. A secondary sieve filter layer 240 is installed inside it. The secondary filter upper flange 220 and secondary filter lower flange 230 are respectively located at the upper end and lower end of the secondary filter cylinder 210. The secondary filter upper flange 220 and the primary filter lower flange 120 are detachably connected. The secondary filter lower flange 230 is connected to the top of the oil storage tank 300. The secondary sieve filter layer 240 is used to filter the lubricating oil after primary sieving to separate the lubricating oil that can be recycled. The oil storage tank 300 is used to collect and store lubricating oil. A vacuum pump 700 is installed on its outer wall.

[0025] In this embodiment of the invention, waste oil and filter adsorbent are added into the primary filter cartridge 110 at a ratio of 1:0.3 to form oil to be filtered. The conical feeding port at the top of the primary filter cartridge 110 prevents the oil to be filtered from overflowing from the edge of the primary filter cartridge 110. The filtered oil passes through the primary sieve filter layer 130 for coarse filtration and the secondary sieve filter layer 240 for fine filtration, separating out recyclable lubricating oil. The coarse filtration and fine filtration are carried out simultaneously. The separated lubricating oil enters the oil storage tank 300 for storage. At the same time, the vacuum pump 700 draws a negative pressure vacuum inside the oil storage tank 300, and the oil storage tank 300 has a certain suction force on the filtered lubricating oil, thereby effectively accelerating the filtration separation and improving the filtration separation efficiency.

[0026] In one embodiment, such as Figures 1-5 As shown, the primary filtration layer 130 has a double-layer filter screen. The upper filter screen has a pore size of 200μm and a thickness of 0.5mm, while the lower filter screen has a feeding primary filtration structure with a pore size of 100μm and a thickness of 1mm. In this embodiment of the present invention, the two filter screens with different pore sizes constitute a highly efficient "coarse-fine" two-stage filtration system. This staged filtration improves the overall filtration efficiency and dust holding capacity. The thick lower filter screen serves as a robust base, ensuring the integrity of the entire filtration assembly under pressure, enhancing its ability to resist pressure impact and physical wear, reducing the risk of filter screen breakage, and ensuring filtration reliability.

[0027] The secondary sieve filter layer 240 includes a single-layer filter screen, filter cotton, and a double-layer filter membrane. The single-layer filter screen has a pore size of 50 μm and a thickness of 1 mm. The filter cotton has a pore size of not less than 5 μm and a thickness of 1 cm. The double-layer filter membrane has pore sizes of 50 μm and 10 μm, respectively.

[0028] The outer diameter of the lower flange 120 of the primary filter is larger than the outer diameter of the bottom port of the primary filter cylinder 110, and it is fastened together with the upper flange 220 of the secondary filter by multiple snap bolts 400.

[0029] In one embodiment, such as Figures 1-6 As shown, the top port of the oil storage tank 300 is provided with a stainless steel flange 310, and an oil guide pipe 320 is provided in the middle of the stainless steel flange 310, with the bottom of the oil guide pipe 320 extending into the interior of the stainless steel flange 310. The stainless steel flange 310 and the secondary filter lower flange 230 are fastened together by hook and bolts 400. In this embodiment of the present invention, the top port of the oil guide pipe 320 communicates with the interior of the secondary filter cylinder 210. Its smaller inner diameter increases the suction force of the negative pressure inside the oil storage tank 300 on the lubricating oil, which allows the filtered lubricating oil to fully enter the interior of the oil storage tank 300.

[0030] In one embodiment, such as Figure 1 and Figure 6 As shown, the outer wall of the oil storage tank 300 is also equipped with a pressure relief valve 500, a pressure gauge, and an observation window 800. The pressure relief valve 500 and the pressure gauge are located near the top of the outer wall of the oil storage tank 300, and the observation window 800 is located in the middle of the side wall of the oil storage tank 300. In this embodiment of the present invention, the pressure gauge is used to monitor the air pressure inside the oil storage tank 300, and the pressure relief valve 500 is used to relieve pressure inside the oil storage tank 300, which can effectively control the pressure of the lubricating oil stored inside the oil storage tank 300. The amount of oil in the oil storage tank 300 can be determined through the observation window 800.

[0031] The bottom of the oil storage tank 300 is conical, and an oil drain pipe 600 is located at its center. A flow meter 610 and an oil drain valve 620 are installed on the oil drain pipe 600. In this embodiment of the invention, the amount of oil in the oil storage tank 300 is determined by the observation window 800, and the oil drain valve 620 is controlled to open or close the oil drain pipe 600, thereby realizing the discharge of lubricating oil. The flow rate is monitored by the flow meter 610 during discharge.

[0032] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

Claims

1. An oil impurity separation device for recyclable lubricating oil, comprising a primary filter structure, a secondary filter structure, and an oil storage tank arranged sequentially from top to bottom, characterized in that, The primary filter structure is installed at the top of the intermediate filter structure. It includes a primary filter cylinder, a lower primary filter flange, and a primary sieve filter layer. The top of the primary filter cylinder has a conical feed port, the lower primary filter flange is located at the bottom port of the primary filter cylinder, and the primary sieve filter layer is installed inside the primary filter cylinder. It is used to filter the lubricating oil to remove large particulate impurities. The intermediate filter structure includes a secondary filter cylinder body, a secondary filter upper flange, and a secondary filter lower flange. The secondary filter cylinder body is arranged opposite to the primary filter cylinder. The secondary sieve filter layer is installed inside it. The secondary filter upper flange and the secondary filter lower flange are respectively located at the upper and lower ends of the secondary filter cylinder body. The secondary filter upper flange and the primary filter lower flange are detachably connected. The secondary filter lower flange is connected to the top of the oil storage tank. The secondary sieve filter layer is used to filter the lubricating oil after primary screening to separate the lubricating oil that can be recycled. The oil storage tank is used to collect and store the lubricating oil, and a vacuum pump is installed on its outer wall.

2. The oil impurity separation device for recyclable lubricating oil according to claim 1, characterized in that, The primary filtration layer has a double-layer filter screen. The upper filter screen has a pore size of 200μm and a thickness of 0.5mm, while the lower filter screen has a feeding primary filtration structure with a pore size of 100μm and a thickness of 1mm.

3. The oil impurity separation device for recyclable lubricating oil according to claim 2, characterized in that, The secondary filtration layer includes a single-layer filter screen, filter cotton, and a double-layer filter membrane. The single-layer filter screen has a pore size of 50 μm and a thickness of 1 mm. The filter cotton has a pore size of not less than 5 μm and a thickness of 1 cm. The double-layer filter membrane has pore sizes of 50 μm and 10 μm, respectively.

4. The oil impurity separation device for recyclable lubricating oil according to claim 3, characterized in that, The outer diameter of the lower flange of the primary filter is larger than the outer diameter of the bottom port of the primary filter cylinder, and it is fastened together with the upper flange of the secondary filter by multiple snap bolts.

5. The oil impurity separation device for recyclable lubricating oil according to claim 3, characterized in that, The top port of the oil storage tank is equipped with a stainless steel flange, and an oil guide pipe is installed in the middle of the stainless steel flange, with the bottom of the oil guide pipe extending into the inside of the stainless steel flange. The stainless steel flange of the tank and the lower flange of the secondary filter are fastened together by hook and bolts.

6. The oil impurity separation device for recyclable lubricating oil according to claim 1, characterized in that, The outer wall of the oil storage tank is also equipped with a pressure relief valve, a pressure gauge and an observation window. The pressure relief valve and pressure gauge are located near the top of the outer wall of the oil storage tank, and the observation window is located in the middle of the side wall of the oil storage tank.

7. The oil impurity separation device for recyclable lubricating oil according to claim 5, characterized in that, The bottom of the oil storage tank is conical, and an oil drain pipe is located at the center of the tank. A flow meter and an oil drain valve are installed on the oil drain pipe.

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