Oil purification device for gear oil recovery
By combining a linkage transmission structure with high-pressure gas stripping and chemical defoaming, the problem of defoamer dilution and unevenness in gear oil recycling is solved, achieving efficient physical defoaming and uniform mixing, thus ensuring the lubrication performance and cost control of gear oil.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-02-26
- Publication Date
- 2026-04-07
AI Technical Summary
In the existing technology, the defoamer has low metering accuracy due to dilution effect during gear oil recovery, resulting in excessive foam, which affects lubrication efficiency. Furthermore, single chemical defoaming is difficult to completely remove viscous bubbles, increasing defoamer consumption and cost.
The foam guide port, which adopts a linkage transmission structure, collects viscous bubbles and conveys them through a foam conveyor belt. Combined with high-pressure gas blowing and chemical defoaming, it achieves efficient physical defoaming. The dual-mode mixing structure ensures uniform dispersion of the defoamer and avoids dilution of the core additives.
It achieves efficient physical defoaming, reduces defoamer consumption, ensures gear oil performance, meets the demand for high-performance, low-cost recycling and reuse, and improves mixing efficiency and quality.
Smart Images
Figure CN121797153A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of gear oil recovery technology, specifically a gear oil purification device for gear oil recovery. Background Technology
[0002] During the performance restoration stage of gear oil recycling, the amount of defoamer added is extremely low, only 0.001%-0.01% of the total oil volume. Its function is to eliminate the bubbles generated during the blending and use of the recycled gear oil, ensuring lubrication efficiency. However, at this time, the blending tank is already filled with a large amount of base oil and other additives. After the defoamer enters, it will be quickly diluted, resulting in its actual concentration in the oil being lower than the design value. Even with a high-precision metering pump, it is difficult to overcome the error caused by the "dilution effect", ultimately leading to excessive foam in the recycled oil during use, affecting lubrication efficiency.
[0003] In existing technologies, the dilution effect can affect measurement accuracy: 1. After adding defoamer, viscous bubbles still exist on the surface of the liquid in the mixing tank, which are difficult to remove completely, exacerbating the consumption of defoamer and requiring more defoamer to be added, increasing costs. However, adding too much defoamer will dilute the concentration of base oil, anti-wear agent, and extreme pressure agent, shortening the service life of the gearbox. 2. Traditional methods of adding defoamers result in uneven dispersion in the oil, with local concentrations that are too high or too low, failing to form a stable defoaming system. This leads to excessive foaming in the regenerated gear oil during use, affecting lubrication efficiency and even causing gearbox cavitation. Summary of the Invention
[0004] The purpose of this invention is to provide an oil purification device for gear oil recycling. The device uses a linkage transmission structure to drive a foam guide port to connect to the oil surface to collect viscous bubbles. The bubbles are then transported by a foam conveyor belt and discharged with high-pressure gas stripping, achieving efficient physical defoaming. When combined with chemical defoaming, it solves the problem of residue from chemical defoaming alone, controls the cost of defoaming agents, avoids dilution of additive concentration, ensures the performance of recycled gear oil, and meets the high-performance and low-cost requirements for its recycling and reuse.
[0005] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: A gear oil purification device for gear oil recovery includes: A mixing tank, wherein the mixing tank is provided with a premixed material inlet at the top of the mixing tank, the premixed material inlet is connected to a mixing conveying pipe, and the mixing tank is provided with a discharge outlet at the bottom of the mixing tank; A mechanical defoaming unit is located at the top of the mixing tank, with one end of the mechanical defoaming unit extending into the inner cavity of the mixing tank. A premixing unit is located on one side of the mixing tank and is connected to the mixing tank through the mixing conveying pipe; An oil bypass diversion unit is connected to one end of the discharge port, and the other end of the oil bypass diversion unit is connected to the premix unit through a mixing and conveying pipe.
[0006] According to some embodiments of the present invention, the mechanical defoaming unit includes a protective cover installed on the sealing cover, a foam conveying box provided in the inner cavity of the protective cover, the foam conveying box being fixedly connected to the sealing cover and extending to the inner cavity of the mixing tank at its bottom end, a foam outlet provided at the top of the foam conveying box, a valve provided on the foam outlet, and a foam guiding port retractably connected to the bottom end of the foam conveying box. The inner cavity of the foam guiding port is provided with an arc-shaped groove. The top of the foam guiding port is provided with a first threaded telescopic rod and a second threaded telescopic rod. The top of the first threaded telescopic rod and the second threaded telescopic rod are provided with a first gear that meshes with each other. The first threaded telescopic rod is connected to the second gear through a belt drive. A third gear is meshed on one side of the second gear. A mixing spray pipe is provided at the center of the third gear. The mixing spray pipe is rotatably connected to the top of the mixing tank. The bottom end of the mixing spray pipe is connected to a spray plate. The bottom end of the spray plate is provided with multiple nozzles. A strip groove is provided on the outer wall of one end of the mixing spray pipe. The top end of the mixing spray pipe is sealed and rotatably connected to the mixing conveying pipe. A sliding groove is provided on the other side of the foam guiding port. An opening and closing plate is connected to the top wall of the sliding groove through multiple springs. A positioning bar is provided on the other side of the opening and closing plate. There are multiple positioning bars arranged in an array. The foam conveying box has a foam conveying mesh belt inside. The top of the foam conveying mesh belt is connected to a drive motor. The drive motor is installed on the top side wall of the foam conveying box. The bottom of the drive motor is provided with multiple auxiliary air jet pipes. Each of the multiple auxiliary air jet pipes has multiple air jet heads on one side. The other end of the multiple auxiliary air jet pipes is connected to a main air jet pipe.
[0007] According to some embodiments of the present invention, the top of the mixing tank is provided with an electric telescopic rod, the bottom end of the electric telescopic rod is connected to a bearing wheel, the center of the bearing wheel is rotatably connected to a toothed sleeve, the toothed sleeve is sleeved on the outside of the mixing spray pipe and intermittently meshes with the strip groove on the outer side wall, and the outer side wall of the toothed sleeve is provided with a first conical toothed disc.
[0008] According to some embodiments of the present invention, the top of the mixing tank is further provided with a stirring motor, the power output end of the stirring motor is provided with a stirring rod, the bottom end of the stirring rod extends to the center of the inner cavity of the mixing tank and is provided with a stirring paddle, and the outer side wall of the stirring rod is provided with a second conical toothed disc that meshes with the first conical toothed disc.
[0009] According to some embodiments of the present invention, the premixing unit includes a primary mixing tank and a secondary mixing tank. The top of the primary mixing tank is provided with a defoamer inlet pipe. A connecting pipe is provided between the primary mixing tank and the secondary mixing tank. A conveying pump and a secondary flow regulating valve are provided on the connecting pipe. The discharge end of the secondary mixing tank is provided with a return pipe. The other end of the return pipe is connected to the mixing conveying pipe.
[0010] According to some embodiments of the present invention, the oil bypass diversion unit includes a support frame, which is disposed at the bottom of the mixing tank. A main flow regulating valve is provided at the top of the support frame. One end of the main flow regulating valve is connected to a raw material feed pipe. A shut-off valve is provided at one end of the main flow regulating valve. A high-pressure pump is provided at one end of the shut-off valve. An oil bypass pipeline is connected between the main flow regulating valve, the shut-off valve, and the high-pressure pump. The other end of the oil bypass pipeline is connected to the premix feed inlet.
[0011] According to some embodiments of the present invention, the top of the mixing tank, the primary mixing tank and the secondary mixing tank are all provided with tempered glass observation windows.
[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention utilizes a linkage transmission structure where a toothed sleeve drives the mixing spray pipe to rotate, synchronously driving the third, second, and first gears to mesh and rotate. This, in turn, drives the first threaded telescopic rod to engage the foam guide port with the oil surface inside the mixing tank, allowing for rapid collection of viscous bubbles from the oil surface. After entering through the guide port, the bubbles are stably conveyed by a foam conveyor belt. A pressure pump, through the main and auxiliary jet pipes, sprays high-pressure gas from multiple jet heads inside the foam conveyor belt, forcefully blowing off the viscous bubbles adhering to the belt surface. These bubbles are then quickly discharged through the foam outlet, achieving highly efficient physical removal of viscous bubbles. This physical defoaming method, combined with chemical defoaming, solves the problem of insufficient removal of viscous bubbles by chemical defoaming alone, preventing ineffective waste of defoaming agent due to bubble residue. 2. This invention employs a dual-mode structure combining simultaneous mixing in primary and secondary mixing tanks with multi-stage secondary mixing. This allows for flexible switching and adaptation based on actual processing conditions, resolving issues such as low batch processing efficiency or insufficient defoamer mixing that often occur in single mixing modes. In simultaneous mixing mode, the main flow regulating valve, shut-off valve, and oil bypass pipeline are used to control the flow, along with pump adjustment, to maintain consistent oil volume in both primary and secondary mixing tanks. This allows for simultaneous addition of defoamer and shear-type mixing of large quantities of oil, achieving simultaneous large-scale addition and mixing of defoamer, thus improving the efficiency of defoamer-oil mixing and adapting to the batch processing requirements of gear oil recovery. In multi-stage secondary mixing mode, the defoamer and oil are pre-mixed in the primary mixing tank, and then the oil is transported to the secondary mixing tank for secondary shear-type mixing. This system achieves gradual addition and deep mixing of the defoamer through step-by-step stirring, ensuring uniform dispersion and thorough mixing of the defoamer in the oil. This dual-mode approach caters to both the batch processing needs of gear oil recycling and the mixing effect of the defoamer, allowing it to fully exert its chemical defoaming function. It avoids localized failure or loss of the defoamer due to uneven mixing, eliminating the need for additional defoamer replenishment to ensure mixing effectiveness and controlling defoamer usage costs. Simultaneously, thorough mixing ensures that the defoamer is always added at a small dosage to achieve the desired defoaming effect, preventing over-addition and dilution of the base oil and core additives such as anti-wear agents and extreme pressure agents. This guarantees the performance of the recycled gear oil, improves the mixing and defoaming efficiency and overall quality of gear oil recycling, and meets the high-efficiency, low-cost, and high-performance requirements for gear oil recycling and reuse. 3. The oil bypass diversion unit of this invention achieves uniform distribution of pretreated oil to the mixing tank and the primary mixing tank through the main flow regulating valve, the shut-off valve, and the oil bypass pipeline. Combined with the transfer pump, it regulates the oil volume balance between the primary and secondary mixing tanks. The dual mixing mode provides stable oil delivery and quantity control support. During synchronous mixing, it ensures consistent oil volume in both tanks, contributing to improved batch mixing efficiency. In multi-stage secondary mixing, it provides a smooth and controllable path for inter-stage oil delivery. Its diversion avoids mixing problems caused by uneven oil distribution, allowing the defoamer to mix efficiently in the appropriate oil volume, reducing losses and additional additions, maintaining a low-dose addition standard, preventing dilution of the core additive concentration, ensuring the performance of the recovered oil, providing a foundation for subsequent defoaming operations, and improving overall processing efficiency.
[0013] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit the invention. Attached Figure Description
[0014] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.
[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the protective cover structure of the present invention; Figure 3 This is a schematic diagram of the internal structure of the mixing tank of the present invention; Figure 4 This is a schematic diagram of the mechanical defoaming unit structure of the present invention; Figure 5 This is a schematic diagram of the foam guide port structure of the present invention; Figure 6 This is a first-view cross-sectional structural schematic diagram of the foam conveying box of the present invention; Figure 7 This is a second-view cross-sectional structural schematic diagram of the foam conveying box of the present invention; Figure 8 This is a schematic diagram of the jet head structure of the present invention.
[0016] In the diagram: 1. Mixing tank; 11. Premixed material inlet; 12. Mixing conveyor pipe; 13. Agitator rod; 14. Electric telescopic rod; 15. Bearing wheel; 16. Geared sleeve; 17. First conical toothed disc; 18. Agitator motor; 110. Agitator paddle; 111. Second conical toothed disc; 112. Tempered glass observation window; 2. Mechanical defoaming unit; 21. Protective cover; 22. Foam conveying box; 23. Foam outlet; 25. Foam guide port; 28. First gear; 210. Second gear; 211. Third gear; 212. Mixing spray pipe; 213. 214. Spraying disc; 215. Nozzle; 216. Foam conveyor belt; 217. Drive motor; 218. Auxiliary jet pipe; 219. Jet head; 220. Main jet pipe; 3. Premixing unit; 31. Primary mixing tank; 32. Secondary mixing tank; 33. Defoamer feed pipe; 34. Connecting pipe; 35. Transfer pump; 36. Auxiliary flow regulating valve; 37. Return pipe; 4. Oil bypass diversion unit; 41. Support frame; 42. Main flow regulating valve; 43. Raw material feed pipe; 44. Shut-off valve; 45. High-pressure pump; 46. Oil bypass pipe; 5. Sealing cover. Detailed Implementation
[0017] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.
[0018] like Figures 1-8As shown, a gear oil recycling oil purification device includes: a mixing tank 1, which has a premixed material inlet 11 at the top of the mixing tank 1, the premixed material inlet 11 being connected to a mixing conveying pipe 12, and an outlet at the bottom of the mixing tank 1; a mechanical defoaming unit 2, which is located at the top of the mixing tank 1, with one end of the mechanical defoaming unit 2 extending into the inner cavity of the mixing tank; a premixed material unit 3, which is located on one side of the mixing tank 1 and is connected to the mixing tank 1 through the mixing conveying pipe 12; and an oil bypass diversion unit 4, which is connected to one end of the outlet, and the other end of the oil bypass diversion unit 4 is connected to the premixed material unit 3 through the mixing conveying pipe 12. By integrating four core units—mixing tank 1, mechanical defoaming unit 2, premixing unit 3, and oil bypass diversion unit 4—through modular design, a closed-loop oil purification path is formed. Each unit achieves material transfer through pipelines and connectors. The overall operation framework of the device is built to ensure smooth connection of the entire process of gear oil from premixing and defoaming to diversion and recovery.
[0019] The mechanical defoaming unit 2 includes a protective cover 21 mounted on a sealing cover 5. The inner cavity of the protective cover 21 contains a foam conveying box 22, which is fixedly connected to the sealing cover 5 and extends to the inner cavity of the mixing tank 1. The top of the foam conveying box 22 has a foam discharge port 23 with a valve. The bottom of the foam conveying box 22 is retractably connected to a foam guiding port 25. The protective cover 21 provides protection for the internal components. The foam conveying box 22 is fixed to the sealing cover 5 and extends into the mixing tank 1. The foam guiding port 25 is retractable and its height is adjustable. The foam discharge port 23 is controlled by a valve to determine the timing of foam discharge. This forms the basic structure for collecting, conveying, and discharging foam. The retractable foam guiding port 25 can adapt to different oil levels, and the valve control ensures that the foam is discharged efficiently and centrally through the foam discharge port 23.
[0020] The inner cavity of the foam guide port 25 is provided with an arc-shaped groove. The top of the foam guide port 25 is provided with a first threaded telescopic rod and a second threaded telescopic rod. The tops of both the first and second threaded telescopic rods are provided with meshing first gears 28. The first threaded telescopic rod is connected to a second gear 210 via a belt drive. A third gear 211 is meshed on one side of the second gear 210. A mixing spray pipe 212 is located at the center of the third gear 211. The mixing spray pipe 212 is rotatably connected to the top of the mixing tank 1. The bottom end of the mixing spray pipe 212 is connected to a spray disc 213. Multiple nozzles 214 are located at the bottom end of the spray disc 213. A strip-shaped groove is provided on the outer wall of one end of the mixing spray pipe 212. The top end of the mixing spray pipe 212 is rotatably connected to the mixing conveying pipe 12. 5. On the other side, there is a chute. The top wall of the chute is connected to an opening and closing plate by multiple springs. On the other side of the opening and closing plate, there are multiple positioning bars arranged in an array. The gear set consisting of the first gear 28, the second gear 210, and the third gear 211 drives the first threaded telescopic rod and the second threaded telescopic rod to drive the foam guide port 25 to rise and fall. The mixing spray pipe 212 is driven to rotate by the third gear 211, and the material is sprayed through the spray plate 213 and the nozzle 214. The opening and closing plate can be flexibly opened and closed by the spring and the positioning bars. The position of the foam guide port 25 is adjusted to fit the oil surface. The mixing spray pipe 212 drives the spray plate 213 to rotate and spray so that the defoamer is evenly distributed. The opening and closing plate structure ensures the sealing of the foam guide port 25 and flexible operation, and improves the efficiency of foam collection and defoamer diffusion.
[0021] The foam conveyor box 22 has a foam conveyor belt 216 inside. A drive motor 217 is connected to the top of the foam conveyor belt 216. The drive motor 217 is mounted on the top side wall of the foam conveyor box 22. Multiple auxiliary air jet pipes 218 are provided at the bottom of the drive motor 217. Multiple air jets 219 are provided on one side of each of the auxiliary air jet pipes 218. The other ends of the auxiliary air jet pipes 218 are connected to a main air jet pipe 220. A pneumatic pump is connected to the other end of the auxiliary air jet pipes 218. The pneumatic pump delivers gas through the main air jet pipe 220. The gas is then sprayed out through the air jets 219 of the auxiliary air jet pipes 218 towards one side of the foam conveyor belt 216, blowing the foam off the surface of the foam conveyor belt 216 and discharging it through the foam discharge port 23. The drive motor 217 drives the foam conveyor belt 216 to transport the adsorbed foam. The air pump generates high-pressure gas, which is ejected from the jet head 219 through the main jet pipe 220 and the auxiliary jet pipe 218. The foam is blown off from the inside of the foam conveyor belt 216 and finally discharged through the foam outlet 23. This achieves efficient physical removal of foam and avoids foam residue. Combined with chemical defoaming, the defoaming is more thorough. The combination of the foam conveyor belt 216 and the high-pressure jet from the jet head 219 ensures that there is no foam residue.
[0022] An electric telescopic rod 14 is provided at the top of the mixing tank 1. A bearing wheel 15 is connected to the bottom end of the electric telescopic rod 14. A toothed sleeve 16 is rotatably connected to the center of the bearing wheel 15. The toothed sleeve 16 is fitted on the outside of the mixing spray pipe 212 and intermittently engages with the strip groove on the outer wall. A first conical toothed disc 17 is provided on the outer wall of the toothed sleeve 16. The extension and retraction of the electric telescopic rod 14 drives the bearing wheel 15 and the toothed sleeve 16 to slide up and down. The toothed sleeve 16 intermittently engages with the mixing spray pipe 212 through the strip groove, synchronously driving the first conical toothed disc 17 to rise and fall to adjust its position. The engagement state of the toothed sleeve 16 and the mixing spray pipe 212 is flexibly controlled, providing power support for the subsequent transmission switching between the first conical toothed disc 17 and the second conical toothed disc 111, realizing the switching between the rotation and stationary modes of the spray disc 213.
[0023] The top of the mixing tank 1 is also equipped with a stirring motor 18. The power output end of the stirring motor 18 is equipped with a stirring rod 13. The bottom end of the stirring rod 13 extends to the center of the inner cavity of the mixing tank 1 and is equipped with a stirring paddle 110. The outer wall of the stirring rod 13 is equipped with a second conical toothed disc 111 that meshes with the first conical toothed disc 17. The stirring motor 18 drives the stirring rod 13 and the stirring paddle 110 to rotate, stirring and mixing the oil in the mixing tank 1. The second conical toothed disc 111 rotates with the stirring rod 13, transmitting power through engagement and disengagement with the first conical toothed disc 17. This achieves thorough mixing of the oil and defoamer in the mixing tank 1, enhancing the chemical defoaming effect. At the same time, the first conical toothed disc 17 and the second conical toothed disc 111 drive the mixing spray pipe 212 and the spray disc 213 to rotate, improving the uniformity of material mixing and spraying.
[0024] The premixing unit 3 includes a primary mixing tank 31 and a secondary mixing tank 32. The top of the primary mixing tank 31 is provided with a defoamer inlet pipe 33. A connecting pipe 34 connects the primary mixing tank 31 and the secondary mixing tank 32. A conveying pump 35 and a secondary flow regulating valve 36 are provided on the connecting pipe 34. The discharge end of the secondary mixing tank 32 is provided with a return pipe 37. The other end of the return pipe 37 is connected to the mixing conveying pipe 12. The defoamer is added to the primary mixing tank 31 through the defoamer inlet pipe 33. The transfer pump 35 and the auxiliary flow regulating valve 36 control the transfer volume of oil between the primary mixing tank 31 and the secondary mixing tank 32. The mixture in the secondary mixing tank 32 is transported to the mixing conveying pipe 12 through the return pipe 37. This achieves multi-stage shear mixing of defoamer and oil in the primary mixing tank 31 and the secondary mixing tank 32, making the mixing more thorough. The auxiliary flow regulating valve 36 and the transfer pump 35 work together to ensure the oil volume balance between the two tanks, so that the subsequent mixing spray pipe 212 and spray disc 213 can achieve uniform spraying of defoamer.
[0025] The oil bypass diversion unit 4 includes a support frame 41, which is located at the bottom of the mixing tank 1. The top of the support frame 41 is equipped with a main flow regulating valve 42. One end of the main flow regulating valve 42 is connected to a raw material feed pipe 43, and one end of the main flow regulating valve 42 is equipped with a shut-off valve 44. One end of the shut-off valve 44 is equipped with a high-pressure pump 45. An oil bypass pipe 46 is connected between the main flow regulating valve 42, the shut-off valve 44 and the high-pressure pump 45. The other end of the oil bypass pipe 46 is connected to the premix feed inlet 11. The support frame 41 fixes the main flow regulating valve 42, the shut-off valve 44 and other diversion components. The main flow regulating valve 42 and the shut-off valve 44 work together to control the flow rate and on / off of the oil. The high-pressure pump 45 provides the conveying power. The oil bypass pipeline 46 realizes the diversion and return of oil to the premix feed inlet 11. The pre-treated oil is distributed to the mixing tank 1 and the premix unit 3 to ensure the stability of the oil volume in each unit. The diversion structure formed by the oil bypass pipeline 46 improves the utilization rate of oil recovery and provides a stable material supply for the dual-mode mixing of the primary mixing tank 31 and the secondary mixing tank 32.
[0026] Tempered glass observation windows 112 are provided at the top of the mixing tank 1, the primary mixing tank 31, and the secondary mixing tank 32. These windows allow for real-time monitoring of the internal operating status of each tank, facilitating timely adjustments to operating parameters and preventing issues such as uneven mixing and incomplete defoaming caused by blind operation, thus improving the overall stability of the equipment.
[0027] Working principle: When recycling gear oil, it is necessary to go through sedimentation, filtration, dehydration, vacuum distillation, adsorption, extraction, and the addition of additives, and finally test it to meet the recycling standards. Additives include anti-wear agents, extreme pressure agents, antioxidants, rust inhibitors, defoamers, etc. The defoamer is added in a small amount, and adding it last can prevent it from being adsorbed by other additives, ensuring that it forms a protective film on the oil surface. The process is as follows: After treatment, the oil is controlled by the flow regulating valve and diverted by the shut-off valve 44 and the oil bypass pipeline 46, so that part of it enters the inner cavity of the mixing tank 1 and the other part enters the inner cavity of the primary mixing tank 31. During this process, a portion of the oil can be transported to the secondary mixing tank 32 by starting the transfer pump 35 installed on the connecting pipeline 34, so as to ensure that the amount of oil in the primary mixing tank 31 and the secondary mixing tank 32 is consistent. Then, defoamer is added. The defoamer enters the inner cavity of the primary mixing tank 31 and the secondary mixing tank 32 through the defoamer inlet pipe 33. The motors at the top of the primary mixing tank 31 and the secondary mixing tank 32 are started to perform shear-type stirring on the internal oil and defoamer, so that the defoamer can be fully mixed with the internal oil. Then, it is transported to the mixing conveying pipe 12 through the oil bypass pipe 46 and the high-pressure pump 45, and then enters the mixing spray pipe 212. At this time, the drive motor 217 at the top of the mixing tank 1 is started. The motor drives the stirring rod 13 and the stirring paddle 110 to rotate, stirring and mixing the gear oil with added defoamer. The oil mixed with defoamer in the mixing and conveying pipe 12 enters the nozzle 214 at the bottom of the spraying plate 213 and is sprayed out. During this process, the second conical toothed plate 111 rotates and drives the first conical toothed plate to rotate and spray the spraying plate 213. It should be noted that the rotation of the spray disc 213 can be controlled by the extension and retraction of the electric telescopic rod 14 to engage and disengage the first conical toothed disc 17 and the second conical toothed disc 111. When engaged, the rotation of the stirring rod 13 can drive the spray disc 213 to rotate, and when disengaged, the stirring can prevent the spray disc 213 from rotating. When the spray disc 213 needs to rotate, the electric telescopic rod 14 can be extended to push the toothed sleeve 16 to slide up and down on the strip groove, so that the first conical toothed disc 17 approaches the second conical toothed disc 111 and engages and rotates with it. When the toothed sleeve 16 drives the mixing spray pipe 212 to rotate, the third gear 211 rotates simultaneously and drives the second gear 210 meshing with it and the two first gears 28 connected to the second gear 210 to rotate. When the two first gears 28 rotate, they drive the first threaded telescopic rod to rotate, causing the foam guide port 25 to move closer to the surface of the oil in the mixing tank 1. The foam on the surface of the oil will enter through the opening of the foam guide port 25 and adhere to the surface of the foam conveyor belt 216. At this time, the drive motor 217 located on the side wall of the foam conveyor box 22 is started, and the motor drives the foam conveyor belt 216 to move, so that the oil adhering to the foam conveyor belt 216... The bubbles are transported to the top until they reach the auxiliary jet pipe 218. Then, the air pressure pump connected to the other end of the auxiliary jet pipe 218 is activated. The air pressure pump sprays high-pressure gas through the main jet pipe 220, the auxiliary jet pipe 218, and multiple jet heads 219. Since the jet heads 219 are located inside the foam conveyor belt 216, the gas sprayed from the inside blows the foam attached to the surface of the foam conveyor belt 216 away from the surface of the foam conveyor belt 216 and discharges it through the foam outlet 23. The foam in the oil in the mixing tank 1 is defoamed by physical means. With the uniform spraying of defoamer, the bubbles remaining on the surface of the oil in the mixing tank 1 can be eliminated to the greatest extent.
[0028] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.
Claims
1. A gear oil purification device for gear oil recovery, characterized in that, include: A mixing tank (1) is provided with a premixed material inlet (11) located at the top of the mixing tank (1), the premixed material inlet (11) is connected to a mixing conveying pipe (12), and the mixing tank (1) is provided with a discharge port at the bottom; Mechanical defoaming unit (2), wherein the mechanical defoaming unit (2) is located at the top of the mixing tank (1), and one end of the mechanical defoaming unit (2) extends into the inner cavity of the mixing tank (1); The premixing unit (3) is located on one side of the mixing tank (1) and is connected to the mixing tank (1) through the mixing conveying pipe (12); Oil bypass diversion unit (4) is connected to one end of the discharge port, and the other end of the oil bypass diversion unit (4) is connected to the premix unit (3) through the mixing conveying pipe (12).
2. The gear oil recovery and purification device according to claim 1, characterized in that, The mechanical defoaming unit (2) includes a protective cover (21) installed on the sealing cover (5). The inner cavity of the protective cover (21) is provided with a foam conveying box (22). The foam conveying box (22) is fixedly connected to the sealing cover (5) and its bottom end extends into the inner cavity of the mixing tank (1). The top of the foam conveying box (22) is provided with a foam outlet (23). The foam outlet (23) is provided with a valve. The bottom end of the foam conveying box (22) is retractably connected with a foam guiding port (25). The inner cavity of the foam guide port (25) is provided with an arc-shaped groove. The top end of the foam guide port (25) is provided with a first threaded telescopic rod and a second threaded telescopic rod. The top ends of the first threaded telescopic rod and the second threaded telescopic rod are provided with a first gear (28) that meshes with each other. The first threaded telescopic rod is connected to a second gear (210) via a belt drive. A third gear (211) is meshed on one side of the second gear (210). A mixing spray pipe (212) is provided at the center of the third gear (211). The mixing spray pipe (212) is rotatably connected to the agitator. At the top of the tank (1), the bottom end of the mixing spray pipe (212) is connected to a spray plate (213), the bottom end of the spray plate (213) is provided with multiple nozzles (214), a strip groove is opened on the outer side wall of one end of the mixing spray pipe (212), and the top end of the mixing spray pipe (212) is sealed and rotatably connected to the mixing conveying pipe (12); a sliding groove is provided on the other side of the foam guiding port (25), and an opening and closing plate is connected to the inner top wall of the sliding groove by multiple springs. A positioning bar is provided on the other side of the opening and closing plate, and multiple positioning bars are provided and arranged in an array. The foam conveying box (22) is equipped with a foam conveying mesh belt (216) in its inner cavity. The top end of the foam conveying mesh belt (216) is connected to a drive motor (217). The drive motor (217) is installed on the top side wall of the foam conveying box (22). The bottom end of the drive motor (217) is provided with multiple auxiliary jet pipes (218). Each of the multiple auxiliary jet pipes (218) is provided with multiple jet heads (219) on one side. The other end of the multiple auxiliary jet pipes (218) is connected to a main jet pipe (220).
3. The gear oil recovery and purification device according to claim 2, characterized in that, The top of the mixing tank (1) is provided with an electric telescopic rod (14), and the bottom end of the electric telescopic rod (14) is connected to a bearing wheel (15). The center of the bearing wheel (15) is rotatably connected to a toothed sleeve (16). The toothed sleeve (16) is sleeved on the outside of the mixing spray pipe (212) and intermittently meshes with the strip groove on the outer wall. The outer wall of the toothed sleeve (16) is provided with a first conical toothed disc (17).
4. The gear oil recovery and purification device according to claim 3, characterized in that, The top of the mixing tank (1) is also provided with a stirring motor (18), and the power output end of the stirring motor (18) is provided with a stirring rod (13). The bottom end of the stirring rod (13) extends to the center of the inner cavity of the mixing tank (1) and is provided with a stirring paddle (110). The outer side wall of the stirring rod (13) is provided with a second conical toothed disc (111) that meshes with the first conical toothed disc (17).
5. The gear oil recovery and purification device according to claim 4, characterized in that, The premix unit (3) includes a primary mixing tank (31) and a secondary mixing tank (32). The top of the primary mixing tank (31) is provided with a defoamer inlet pipe (33). A connecting pipe (34) is provided between the primary mixing tank (31) and the secondary mixing tank (32). A conveying pump (35) and a secondary flow regulating valve (36) are provided on the connecting pipe (34). A return pipe (37) is provided at the discharge end of the secondary mixing tank (32). The other end of the return pipe (37) is connected to the mixing conveying pipe (12).
6. The gear oil recovery and purification device according to claim 1, characterized in that, The oil bypass diversion unit (4) includes a support frame (41), which is located at the bottom of the mixing tank (1). The top of the support frame (41) is provided with a main flow regulating valve (42). One end of the main flow regulating valve (42) is connected to a raw material feed pipe (43). One end of the main flow regulating valve (42) is provided with a shut-off valve (44). One end of the shut-off valve (44) is provided with a high-pressure pump (45). An oil bypass pipe (46) is connected between the main flow regulating valve (42), the shut-off valve (44), and the high-pressure pump (45). The other end of the oil bypass pipe (46) is connected to the premix feed inlet (11).
7. The gear oil recovery and purification device according to claim 5, characterized in that, The top of the mixing tank (1), the primary mixing tank (31) and the secondary mixing tank (32) are all provided with tempered glass observation windows (112).