A lubricating oil production additive pre-mixing device
By employing a double-wall structure, a cleaning mechanism, and a heat transfer oil circulation system in the lubricant production additive pre-mixing unit, the problem of difficult removal of residues from the inner wall of traditional units has been solved, achieving uniform dispersion of additives and uniform heat transfer, thereby improving the performance and quality of lubricant products.
Patent Information
- Application Number
- CN202522669884.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-17
- Publication Date
- 2026-11-06
- Estimated Expiration
- 2035-12-17
AI Technical Summary
Traditional additive pre-mixing devices lack a cleaning module, resulting in the inability to effectively remove highly viscous residues from the inner wall, forming an aging film, increasing the risk of heat transfer deterioration and cross-contamination, especially when switching sensitive formulations, even trace amounts of residue can cause product performance failure.
A premixing vessel with a double-walled structure was designed. An annular chamber is provided between the inner and outer cylinders. A cleaning mechanism is installed on the central shaft, equipped with a rotary joint and an annular spray pipe. Combined with a spiral stirring blade and a scraper, it can achieve 360° dynamic spraying and full-coverage scraping. Combined with a heat transfer oil circulation system, the heat transfer efficiency is improved.
It effectively removes residues from the inner wall, prevents scorching and sticking, ensures uniform dispersion of additives, improves product performance stability and quality consistency, and avoids local overheating or underheating.
Smart Images
Figure CN224938086U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lubricating oil production technology, and more specifically, to a lubricating oil production additive pre-mixing device. Background Technology
[0002] In the production process of lubricating oil, the pre-mixing of additives is a crucial step in ensuring the stable performance and reliable quality of the final product. An additive pre-mixing device is a specialized system used in the lubricating oil blending process to pre-mix, dilute, or activate various functional additives (such as antioxidants, detergents, dispersants, extreme pressure anti-wear agents, viscosity index improvers, etc.) in precise proportions. Its main purpose is to ensure that the additives are uniformly dispersed and fully dissolved in the base oil, thereby improving the performance stability and quality consistency of the final lubricating oil product.
[0003] Traditional additive pre-mixing devices often lack a cleaning module, relying on manual opening and rinsing or fixed spray ball cleaning. This fails to effectively remove highly viscous residues from the inner walls, often only rinsing away surface oil. Stubborn residues accumulate over time, forming an "aging film," further exacerbating heat transfer degradation and increasing the risk of cross-contamination. Especially when switching between sensitive formulations such as silicone-containing antifoaming agents and ashless dispersants, even trace amounts of residue can lead to product performance failure. Utility Model Content
[0004] In view of the problems in the related technologies, this utility model proposes a pre-mixing device for lubricating oil production additives to overcome the above-mentioned technical problems existing in the existing related technologies.
[0005] Therefore, the specific technical solution adopted by this utility model is as follows:
[0006] A premixing device for lubricating oil production additives includes a premixing kettle. The premixing kettle has a double-walled structure consisting of an inner cylinder and an outer cylinder. An annular chamber is provided between the inner cylinder and the outer cylinder. A central shaft is provided inside the inner cylinder. A cleaning mechanism is connected to the central shaft. The cleaning mechanism is located in a through hole of the central shaft. A connecting hose is provided inside the through hole. One end of the connecting hose is connected to a rotary joint, and the other end of the connecting hose is connected to an annular pipe. A nozzle is connected to the bottom end of the annular pipe.
[0007] Furthermore, a rotary joint is installed at the top of the central shaft, and the rotary joint is connected to the infusion tube, which is connected to the cleaning medium supply system.
[0008] Furthermore, the outer side of the annular tube is connected to the connecting frame, and the connecting frame is connected to the central shaft.
[0009] Furthermore, a spiral stirring blade is connected to the central shaft, and a long scraper is connected to the central shaft through multiple fixed rods, with an arc-shaped scraper connected below the lowest fixed rod.
[0010] Furthermore, a top cover is connected to the top of the premixing vessel, and a central shaft is connected to the top cover via a bearing. A driven gear is connected to the central shaft, and a driving gear is meshed with one side of the driven gear. The driving gear is connected to the output end of the drive motor via a drive shaft, and the drive motor is connected to the top cover via a mounting bracket.
[0011] Furthermore, a spiral oil guide pipe is provided inside the annular chamber, and both ends of the spiral oil guide pipe are connected to the external heat transfer oil circulation system through oil delivery pipes.
[0012] Furthermore, the top cover is equipped with a feeding port, and the bottom of the premixing kettle is equipped with a discharge pipe with a valve.
[0013] The beneficial effects of this utility model are as follows:
[0014] (1) By setting a through hole inside the central shaft and connecting the rotary joint to the annular spray pipe through a connecting hose, the cleaning medium can synchronously drive the annular pipe and the nozzle to perform 360° dynamic spraying during the rotation of the stirring shaft. This structure can effectively cover all areas of the inner wall, improve the peeling ability of high-viscosity residues, and achieve full coverage scraping of the inner wall of the straight section and the conical head by setting a long scraper and a bottom arc scraper, continuously removing the attached materials during the cleaning and stirring process, and preventing high-viscosity additives from sticking to the wall, coking or carbonizing.
[0015] (2) By setting a spiral oil guide pipe in the annular chamber and connecting it to an external heat transfer oil circulation system, the heat transfer area is greatly increased, the heat transfer efficiency is enhanced, the temperature distribution inside the reactor is more uniform, and the swelling and activation of high viscosity additives such as viscosity index improvers are effectively promoted, avoiding local overheating or insufficient heating. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a front view of a lubricating oil production additive pre-mixing device according to an embodiment of the present utility model;
[0018] Figure 2 This is a side view of a lubricating oil production additive pre-mixing device according to an embodiment of the present utility model;
[0019] Figure 3 This is an internal structural diagram of a lubricating oil production additive pre-mixing device according to an embodiment of the present utility model;
[0020] Figure 4 This is a structural diagram of the cleaning mechanism of a lubricating oil production additive pre-mixing device according to an embodiment of the present utility model;
[0021] Figure 5 This is a structural diagram of the central shaft of a lubricating oil production additive premixing device according to an embodiment of the present utility model.
[0022] In the picture:
[0023] 1. Premixing vessel; 2. Inner cylinder; 3. Outer cylinder; 4. Annular chamber; 5. Central shaft; 6. Cleaning mechanism; 601. Through hole; 602. Connecting hose; 603. Annular pipe; 604. Rotary joint; 605. Nozzle; 7. Infusion pipe; 8. Connecting frame; 9. Spiral agitator blade; 10. Fixing rod; 11. Long scraper; 12. Arc-shaped scraper; 13. Top cover; 14. Driven gear; 15. Drive gear; 16. Drive motor; 17. Mounting bracket; 18. Spiral oil guide pipe; 19. Oil delivery pipe; 20. Feed port; 21. Discharge pipe. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0025] According to an embodiment of the present invention, a pre-mixing device for lubricating oil production additives is provided.
[0026] like Figures 1-4As shown, the lubricating oil production additive premixing device according to an embodiment of the present invention includes a premixing kettle 1. The premixing kettle 1 has a double-wall structure consisting of an inner cylinder 2 and an outer cylinder 3. An annular chamber 4 is provided between the inner cylinder 2 and the outer cylinder 3. A spiral oil guide pipe 18 is provided inside the annular chamber 4. The two ends of the spiral oil guide pipe 18 are connected to an external heat transfer oil circulation system through oil delivery pipes 19. The external heat transfer oil circulation system includes a heat transfer oil heating furnace, a high-temperature circulation pump, an expansion tank, an oil-gas separator, and a temperature control unit. It is used to send heat transfer oil heated to a set temperature (50–180°C) through an oil inlet and oil delivery pipe to one end of the spiral oil guide pipe 18, and return it to the circulation system from the other end, forming a closed-loop forced circulation circuit to ensure that the material in the inner cylinder 2 is heated evenly. The inner cylinder 2 has a central shaft 5 inside, and a cleaning mechanism 6 is connected to the central shaft 5. The cleaning mechanism 6 is located in a through hole 601 of the central shaft 5. A connecting hose 602 (preferably a high-temperature resistant, oil-resistant, flexible metal braided corrugated hose) is installed inside the through hole 601. One end of the connecting hose 602 is connected to a rotary joint 604, and the other end of the connecting hose 602 is connected to an annular pipe 603. A nozzle 605 is connected to the bottom end of the annular pipe 603. The rotary joint 604 is installed at the top of the central shaft 5 and is connected to an infusion pipe 7. The infusion pipe 7 is connected to a cleaning medium supply system, which includes a cleaning oil storage tank, a high-temperature resistant gear pump, and a control valve assembly, for supplying the annular pipe 603 with light base oil heated to 60–90°C or a special residue-free cleaning agent. The annular pipe 603 is connected to a connecting frame 8 on the outside, and the connecting frame 8 is connected to the central shaft 5.
[0027] like Figures 1-4 As shown, a spiral stirring blade 9 is connected to the central shaft 5, and its spiral direction matches the material flow direction, which can generate a strong axial circulation flow and promote the overall uniform mixing of highly viscous materials. A long scraper 11 is connected to the central shaft 5 via multiple fixed rods 10. The long scraper 11 is in close contact with the inner wall of the straight section of the inner cylinder 2, with a gap controlled at 3–8 mm. The preferred material is PTFE-coated or ultra-high molecular weight polyethylene. During the stirring process, it continuously scrapes off the attached material. An arc-shaped scraper 12 is connected below the lowest fixed rod 10 to clean the bottom area of the vessel, ensuring no dead corners and further improving the uniformity of material dispersion and heat transfer efficiency. A top cover 13 is connected to the top of the premixing vessel 1. The central shaft 5 is connected to the top cover 13 via bearings. A driven gear 14 is connected to the central shaft 5, and a driving gear 15 is meshed on one side of the driven gear 14. The driving gear 15 is connected to the output end of the drive motor 16 via a drive shaft. The drive motor 16 is connected to the top cover 13 via a mounting bracket 17. The top cover 13 is provided with a feeding port 20 for connecting the liquid additive feeding pipe and the powder feeding pipe. The bottom of the premixing kettle 1 is provided with a discharge pipe 21, and a valve is provided on the discharge pipe 21 to ensure that the material is completely discharged and there is no dead corner for accumulation.
[0028] In operation, firstly, liquid and powder additives are added through the feeding port 20 on the top cover 13. Then, the external heat transfer oil circulation system is activated. The heat transfer oil is heated to the set temperature in the heat transfer oil heater and then transported to one end of the spiral oil guide pipe 18 by a high-temperature circulation pump. The heat transfer oil flows counterclockwise from bottom to top along the spiral path, fully contacting the outer wall of the inner cylinder 2 and transferring heat to the material in the premixing kettle 1. Then, the drive motor 16 drives the drive gear 15 to rotate, which in turn causes the central shaft 5 to start rotating through the driven gear 14. The spiral stirring blades 9 on the central shaft 5 rotate in a specific spiral direction, generating a strong axial circulation flow, which effectively promotes the overall uniform mixing of high-viscosity materials. At the same time, multiple long scrapers 11 fixed on the central shaft 5 are in close contact with the inner wall of the inner cylinder 2, continuously scraping off the attached material to prevent the formation of a stubborn wall layer. The arc-shaped scraper 12 located below the lowest fixed rod 10 is specifically designed to clean the bottom of the conical head, ensuring no dead corners remain, further improving the uniformity of material dispersion and heat transfer efficiency. After thorough mixing, the additive is discharged through the outlet pipe 21 by opening the valve. The premixing vessel 1 is then cleaned by restarting the drive motor 16, which drives the scraper to remove material from the inner wall. Simultaneously, the cleaning medium supply system is activated. A high-temperature gear pump delivers preheated light base oil (60–90°C) or a special residue-free cleaning agent through the infusion pipe 7 to the rotary joint 604, and then through the connecting hose 602 into the annular pipe 603. As the central shaft 5 slowly rotates, the annular pipe 603 and its bottom nozzle 605 also rotate, forming a dynamic rotating spray flow field. This not only covers the entire inner wall surface of the vessel but also enhances the impact and peeling ability of the cleaning fluid on the deposits through the centrifugal force generated by the rotation. After cleaning, the cleaning fluid is discharged from the outlet pipe 21.
[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A device for pre-mixing additives for lubricating oil production, characterized in that, The device includes a premixing vessel (1), which is composed of an inner cylinder (2) and an outer cylinder (3) forming a double-wall structure. An annular chamber (4) is provided between the inner cylinder (2) and the outer cylinder (3). A central shaft (5) is provided inside the inner cylinder (2). A cleaning mechanism (6) is connected to the central shaft (5). The cleaning mechanism (6) is located in the through hole (601) of the central shaft (5). A connecting hose (602) is provided inside the through hole (601). One end of the connecting hose (602) is connected to a rotary joint (604), and the other end of the connecting hose (602) is connected to an annular pipe (603). A nozzle (605) is connected to the bottom end of the annular pipe (603).
2. The lubricating oil production additive pre-mixing device according to claim 1, characterized in that, The rotary joint (604) is installed at the top of the central shaft (5). The rotary joint (604) is connected to the infusion tube (7), which is connected to the cleaning medium supply system.
3. The lubricating oil production additive pre-mixing device according to claim 1, characterized in that, The outer side of the annular tube (603) is connected to the connecting frame (8), and the connecting frame (8) is connected to the central shaft (5).
4. The lubricating oil production additive pre-mixing device according to claim 1, characterized in that, A spiral stirring blade (9) is connected to the central shaft (5), and a long scraper (11) is connected to the central shaft (5) through multiple fixing rods (10). An arc-shaped scraper (12) is connected below the lowest fixing rod (10).
5. The lubricating oil production additive pre-mixing device according to claim 1, characterized in that, The premixing vessel (1) is connected to a top cover (13) at its top. The central shaft (5) is connected to the top cover (13) via a bearing. A driven gear (14) is connected to the central shaft (5). A driving gear (15) is meshed with one side of the driven gear (14). The driving gear (15) is connected to the output end of the drive motor (16) via a drive shaft. The drive motor (16) is connected to the top cover (13) via a mounting bracket (17).
6. The lubricating oil production additive pre-mixing device according to claim 1, characterized in that, The annular chamber (4) is equipped with a spiral oil guide pipe (18), and both ends of the spiral oil guide pipe (18) are connected to the external heat transfer oil circulation system through oil delivery pipes (19).
7. A lubricating oil production additive pre-mixing device according to claim 5, characterized in that, The top cover (13) is provided with a feeding port (20), and the bottom end of the premixing kettle (1) is provided with a discharge pipe (21), and the discharge pipe (21) is provided with a valve.