Stirring barrel capable of preventing oil sludge from splashing
By installing a splash guard and a pressure relief structure in the mixing tank, the problem of sludge flowing towards the tank lid during mixing is solved, achieving clean and safe operation of the equipment, and improving mixing efficiency and equipment lifespan.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG IRON & STEEL CO LTD
- Filing Date
- 2025-04-24
- Publication Date
- 2026-05-05
AI Technical Summary
In the mixing tank, the sludge forms a vortex under strong stirring and surges upward along the tank wall, causing the tank lid to stick, become contaminated and leak, affecting the cleanliness and normal operation of the equipment.
A splash guard is installed between the barrel and the cover plate to form an inward-curving annular baffle step around the top of the barrel, preventing sludge from flowing towards the cover and preventing sludge from sticking and seeping out through the guiding effect. At the same time, a pressure relief pipe, heating structure and liquid level detection system are provided to ensure the stirring effect and equipment safety.
It effectively prevents sludge from sticking to the lid, avoids contamination and leakage, improves mixing efficiency, ensures clean and safe operation of the equipment, and extends the equipment's lifespan.
Smart Images
Figure CN224194513U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mixing tank technology, specifically to a mixing tank that prevents oil sludge from splashing. Background Technology
[0002] In steel rolling, the emulsion needs to pass through a magnetic filtration system to remove iron powder. The scraper removes the iron powder, forming oily sludge. The process lubrication and cooling medium added between the rolling roller and the rolling material, as well as the oil sludge formed by the rolling oil and rolling fluid, also become rolling mill sludge.
[0003] Rolling mill sludge is mainly composed of metal oxides, unburned lubricating oil, organic matter and other impurities. It is a solid-liquid mixture. Because it contains nearly half iron powder slag and a large amount of grease, it has high reuse value.
[0004] Before reusing mill sludge, it must be diluted and stirred to facilitate subsequent separation and purification operations. Currently, the common practice is to pour the mill sludge into a mixing tank for dilution and stirring. Under the strong stirring of the mixing device, the mill sludge inevitably forms a vortex, which surges upward along the inner wall of the mixing tank and flows towards the tank lid. Over time, with frequent stirring operations and the impact and wetting from the mill oil, the tank lid can stick to the mixing tank, affecting maintenance. Furthermore, the mill sludge continuously contaminates the lower surface of the tank lid, accumulating a thick layer of dirt underneath, severely affecting the cleanliness and normal operation of the equipment. In addition, because the design of the liquid inlet and observation window on the tank lid cannot achieve absolute sealing, the mill sludge may also seep out from the seams. Utility Model Content
[0005] To address the technical problem that the swirling flow formed by the oil sludge in the mixing tank under the strong stirring of the mixing device will surge upward along the inner wall of the mixing tank and flow towards the tank lid, causing the tank lid to stick to the mixing tank, contaminating the tank lid, and oil sludge to seep out of the rolling mill, this utility model provides a mixing tank that prevents oil sludge from splashing.
[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0007] A mixing tank for preventing sludge splashing includes a tank body with an open top and a cover plate at the top. The cover plate has a liquid inlet at its top. A liquid outlet pipe extends out of the tank body from the bottom of the tank body, and a liquid outlet valve is provided at one end of the liquid outlet pipe extending out of the tank body. A vertically mounted stirring shaft is rotatably installed inside the tank body, and a stirring paddle is connected to the outer circumference of the stirring shaft. A splash guard is provided between the tank body and the cover plate. The inner side of the splash guard extends inward beyond the inner wall of the tank body along the upper end surface. The lower surface of the splash guard extending inward beyond the inner wall of the tank body forms an inwardly recessed annular baffle step around the top of the tank body.
[0008] With the above structural design, the lower surface of the splash plate extends inward beyond the inner wall of the barrel, forming a recessed annular flow-blocking step around the top of the barrel. There is a height difference between the lower surface of the splash plate and the lower surface of the cover plate. When the sludge forms a vortex and surges upward along the barrel wall during stirring, the splash plate effectively blocks the sludge and acts as a guide, preventing it from flowing directly towards the lid. Instead, the sludge forms a downward bend along the lower surface of the splash plate after contacting it. This prevents the sludge from adhering to the lid and contaminating its lower surface, and also prevents it from seeping out from the structural seams on the lid.
[0009] As a preferred implementation of a mixing tank to prevent sludge from splashing, the bottom of the splash guard is welded to the upper end face of the tank body, or a sealing ring is provided between the bottom of the splash guard and the upper end face of the tank body.
[0010] With the above structural design, the bottom of the splash guard is welded to the upper surface of the barrel, ensuring a firm connection and forming a stable barrier structure. This prevents loosening over long-term use and effectively guarantees splash prevention and sealing. If the splash guard and barrel are installed separately, a sealing ring can be installed between the bottom of the splash guard and the upper surface of the barrel to create a seal and prevent oil sludge from leaking from the connection point.
[0011] As a preferred implementation of a mixing tank to prevent sludge splashing, the outer side of the splash guard extends beyond the outer wall of the tank body, and the outer edge of the cover plate is located on the upper surface of the splash guard.
[0012] The above structural design makes the cover plate more stable.
[0013] As a preferred implementation of a mixing tank to prevent sludge splashing, a fixed bracket is installed on the top of the cover plate, a pulse level gauge is installed on the top of the fixed bracket, and a probe is provided at the bottom of the pulse level gauge, which extends through the cover plate into the interior of the tank.
[0014] With the above structural design, the pulse level gauge uses a guided pulse method to transmit pulse signals to the probe, receive pulse signals reflected from the liquid surface, and detect the level of the sludge based on the time from the pulse signal being sent to its reflection, thereby more accurately detecting the liquid level status.
[0015] As a preferred implementation of a mixing tank to prevent sludge splashing, a stirring motor is installed at the top center of the cover plate. The output shaft of the stirring motor passes through the cover plate and is connected to the top of the stirring shaft. The bottom of the stirring shaft is rotatably connected to the tank body.
[0016] As a preferred implementation of a mixing tank to prevent sludge splashing, a pressure relief pipe extending out of the tank body is provided at the top of the tank body, and a pressure relief valve is provided at the end of the pressure relief pipe extending out of the tank body.
[0017] With the above structural design, during the mixing process, the pressure inside the tank will change due to the tumbling of the sludge and the possible generation of gas. The pressure relief pipe and valve can promptly discharge excess gas from the tank, preventing excessive pressure inside the tank and avoiding the sludge from being squeezed out of the tank lid due to pressure issues. At the same time, it can also protect the equipment and extend its service life.
[0018] As a preferred implementation of a mixing tank to prevent sludge from splashing, the top of the cover plate is provided with an observation port, and the observation port is detachably covered with an observation window.
[0019] With the above structural design, operators can directly observe the mixing of the sludge inside the tank through the observation port and observation window cover, such as the state of the sludge and the formation of vortices, so as to promptly identify problems and take corresponding measures. The removable observation window cover facilitates cleaning and avoids obstruction of observation due to sludge contamination.
[0020] As a preferred implementation of a mixing tank to prevent sludge splashing, the tank body has a hollow double-layer structure. The tank body has a hollow cavity inside the tank wall, and a heating element is installed inside the hollow cavity. A filling pipe is provided on the top side of the tank body, and a discharge pipe is provided on the bottom side of the tank body. A discharge valve is provided at the outlet end of the discharge pipe. Both the filling pipe and the discharge pipe are connected to the hollow cavity.
[0021] By using the above structural design, a heating medium, such as heat transfer oil, is injected into the hollow cavity. The heating element heats the heating medium, which can uniformly heat the sludge in the tank, increase the fluidity of the sludge, reduce the viscosity of the sludge, and improve the stirring effect and separation and purification efficiency.
[0022] As a preferred implementation of a mixing tank to prevent sludge splashing, the outer wall of the tank has a high liquid level window and a low liquid level window, the high liquid level window is higher than the low liquid level window, and both the high liquid level window and the low liquid level window are connected to the hollow cavity.
[0023] With the above structural design, operators can directly observe the liquid level of the heating medium in the hollow cavity through the high-level and low-level windows, which facilitates timely replenishment or adjustment of the heating medium, ensuring that the heating element can work normally, maintaining the heating effect of the oil sludge in the tank, and further improving the stirring and separation purification effect.
[0024] As a preferred implementation of a mixing tank to prevent sludge from splashing, the bottom of the tank is provided with a fixed base.
[0025] With the above structural design, the bottom of the tank is equipped with a fixed base, which allows the mixing tank to be placed stably on the ground, reducing shaking and displacement of the tank during the mixing process, ensuring smooth mixing operation, protecting the tank and internal structure, extending the service life of the equipment, and facilitating the installation and maintenance of the equipment.
[0026] The beneficial effects of this utility model include:
[0027] This application provides a splash guard between the barrel body and the cover plate. The splash guard extends inward beyond the lower surface of the inner wall of the barrel, forming an inwardly recessed annular flow-blocking step around the top of the barrel body. There is a height difference between the lower surface of the splash guard and the lower surface of the cover plate, which allows the splash guard to effectively block sludge from flowing towards the barrel cover, thereby preventing sludge from sticking to the barrel cover and contaminating the lower surface of the barrel cover, and also preventing sludge from seeping out from the structural seams on the barrel cover. Attached Figure Description
[0028] To more clearly illustrate the technical solution of this utility model, the drawings used in the description 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.
[0029] Figure 1 This is a schematic diagram of the internal structure of a mixing tank for preventing sludge splashing in a specific embodiment of this utility model. Figure 1 ;
[0030] Figure 2 This is a schematic diagram of the internal structure of a mixing tank for preventing sludge splashing in a specific embodiment of this utility model. Figure 2 ;
[0031] Figure 3 This is a schematic diagram of the internal structure of the barrel in a specific embodiment of this utility model;
[0032] Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point A;
[0033] Figure 5 This is a top view of a mixing tank for preventing sludge splashing, according to a specific embodiment of the present invention.
[0034] Figure 6 This is a partial structural diagram of the splash guard in a specific embodiment of the present invention.
[0035] List of components and reference numerals:
[0036] 1. Tank body; 2. Fixed base; 3. Hollow cavity; 4. Heating element; 5. Filling pipe; 6. Discharge pipe; 7. Discharge valve; 8. High liquid level window; 9. Low liquid level window; 10. Cover plate; 11. Liquid inlet; 12. Observation window cover; 13. Handle; 14. Fixed bracket; 15. Stirring motor; 16. Pulse level gauge; 17. Probe; 18. Stirring shaft; 19. Stirring paddle; 20. Discharge pipe; 21. Discharge valve; 22. Pressure relief pipe; 23. Pressure relief valve; 24. Splash guard; 25. Flow guide. Detailed Implementation
[0037] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0038] Reference Figure 1-5 This embodiment proposes a mixing tank to prevent sludge splashing, comprising a tank body 1 with an open top and a fixed base 2 at the bottom. The tank body 1 has a hollow double-layer structure, with a hollow cavity 3 inside the tank wall. A heating element 4, which can be an electric heating rod, is located inside the hollow cavity 3. A filling pipe 5 is located at the top side of the tank body 1, and a discharge pipe 6 is located at the bottom side of the tank body 1. A discharge valve 7 is located at the outlet end of the discharge pipe 6. Both the filling pipe 5 and the discharge pipe 6 are connected to the hollow cavity 3. A high-level liquid window 8 and a low-level liquid window 9 are opened on the outer wall of the tank body 1. The high-level liquid window 8 is higher than the low-level liquid window 9, and both the high-level liquid window 8 and the low-level liquid window 9 are connected to the hollow cavity 3. Heat transfer oil can be injected into the hollow cavity 3 through the filling pipe 5. The liquid level of the heat transfer oil in the hollow cavity 3 can be observed through the high liquid level window 8 and the low liquid level window 9. The heating element 4 can heat the heat transfer oil, thereby uniformly heating the oil inside the barrel 1. The heat transfer oil can be discharged by opening the discharge valve 7.
[0039] The top of the tank body 1 is provided with a cover plate 10, and the top of the cover plate 10 has a liquid inlet 11 and an observation port. The observation port is provided with a detachable observation window cover 12. Handles 13 are also provided on opposite sides of the top of the cover plate 10. A fixed bracket 14 and a stirring motor 15 are installed on the top of the cover plate 10. A pulse level gauge 16 is installed on the top of the fixed bracket 14. A probe 17 is provided at the bottom of the pulse level gauge 16. The probe 17 passes through the cover plate 10 and extends into the interior of the tank body 1. The output shaft of the stirring motor 15 passes through the cover plate 10 and is connected to the top of the stirring shaft 18. The stirring shaft 18 is installed vertically. A stirring paddle 19 is connected to the outer circumference of the stirring shaft 18. The bottom end of the stirring shaft 18 is rotatably connected to the tank body 1. Specifically, the bottom end of the stirring shaft 18 passes through the hollow cavity 3.
[0040] The bottom of the tank body 1 is provided with a liquid outlet pipe 20 extending out of the tank body 1. Specifically, two liquid outlet pipes 20 at different heights can be provided, and each liquid outlet pipe 20 is provided with a liquid outlet valve 21 at one end extending out of the tank body 1. The top of the tank body 1 is provided with a pressure relief pipe 22 extending out of the tank body 1, and a pressure relief valve 23 is provided at one end extending out of the tank body 1.
[0041] A splash guard 24 is provided between the barrel body 1 and the cover plate 10. The inner side of the splash guard 24 extends inward beyond the inner wall of the barrel body 1 along the upper end surface. The lower surface of the splash guard 24 extending inward beyond the inner wall of the barrel body 1 forms an inwardly recessed annular baffle step around the top of the barrel body 1 with the inner wall of the barrel body 1. The outer side of the splash guard 24 extends beyond the outer wall of the barrel body 1. The outer edge of the cover plate 10 is located on the upper surface of the splash guard 24. The cover plate 10 can be bolted to the edge of the splash guard 24 extending outward beyond the outer wall of the barrel body 1. Figure 3 and Figure 4 The arrows in the diagram indicate the direction of the sludge flow under the action of the splash guard 24.
[0042] In this embodiment, the bottom of the splash guard 24 is welded to the upper end face of the barrel 1. In another embodiment, a sealing ring can be provided between the bottom of the splash guard 24 and the upper end face of the barrel 1.
[0043] Reference Figure 6 The inner edge of the splash guard 24 is provided with a downwardly bent guide edge 25. The guide edge 25 can further enhance the guiding effect of the splash guard 24. When the surging sludge comes into contact with the lower surface of the splash guard 24, it will form a downward corner along the lower surface of the splash guard 24 and the lower surface of the guide edge 25, which can more effectively prevent the sludge from splashing onto the lower surface of the cover plate 10.
[0044] Work process:
[0045] The operator first injects heat transfer oil into the hollow cavity 3 of the double-layer structure of the tank 1 through the filling pipe 5. During the filling process, the heat transfer oil level is observed through the high liquid level window 8 and the low liquid level window 9 on the outer wall of the tank 1 until the liquid level reaches the appropriate range to ensure that the heating element 4 can work normally afterwards.
[0046] The mill sludge to be treated is poured into the tank 1 through the inlet 11 at the top of the cover plate 10. At this time, the pulse level gauge 16 starts to work. It transmits pulse signals to the probe 17 and receives pulse signals reflected from the liquid surface. Based on the time from the pulse signal being sent to its reflection, it accurately detects the sludge level in the tank, which makes it convenient for operators to control the amount of sludge injected and avoids the liquid level being too high, which would affect subsequent stirring.
[0047] The stirring motor 15 is started, and the output shaft of the stirring motor 15 drives the stirring shaft 18 to rotate. The stirring paddle 19 connected to the outer circumference of the stirring shaft 18 rotates at high speed inside the tank 1, stirring the oil sludge inside the tank. During the stirring process, due to the characteristics of the oil sludge, swirling currents inevitably form and surge upwards along the tank wall. Under the action of the splash plate 24, the surging oil sludge contacts the lower surface of the splash plate 24, and the impact force of the oil sludge is dispersed, forming a swirling current along the lower surface of the splash plate 24. Figure 3 and Figure 4 The downward flow of liquid in the container prevents it from directly reaching the lid. Simultaneously, due to the agitation of the sludge and the potential generation of gas, the pressure inside the container changes. The pressure relief pipe 22 and pressure relief valve 23 can promptly release excess gas, maintaining stable pressure inside the container and preventing excessive pressure from causing the sludge to be squeezed out from the lid gaps, thus protecting the equipment.
[0048] While stirring, the heating element 4 (such as an electric heating rod) inside the hollow cavity 3 heats the heat transfer oil. The heated heat transfer oil evenly heats the sludge inside the tank 1, increasing the sludge's fluidity, reducing its viscosity, and improving the stirring effect, which is beneficial for subsequent separation and purification operations. The operator continuously monitors the heat transfer oil level inside the hollow cavity 3 through the transparent high-level window 8 and low-level window 9, and replenishes or adjusts the amount of heat transfer oil as needed to ensure stable heating.
[0049] Operators can directly observe the mixing of the sludge inside the tank through the transparent observation window 12 on top of the cover plate 10, including the state of the sludge and the formation of swirls. If any abnormalities are found, corresponding measures can be taken in a timely manner, such as adjusting the mixing speed or inspecting equipment components. In addition, the observation window 12 is removable, making it easy to remove and clean regularly to prevent sludge contamination from obstructing the view.
[0050] Once the sludge is stirred and the desired treatment effect is achieved, open the outlet valve 21 at one end of the outlet pipe 20 extending from the bottom of the tank 1. The treated sludge is then discharged from the tank 1 through the outlet pipe 20 and enters the subsequent separation and purification process.
[0051] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A mixing tank for preventing sludge splashing, comprising a tank body (1), the top of the tank body (1) being open, a cover plate (10) being provided on the top of the tank body (1), a liquid inlet (11) being provided on the top of the cover plate (10), a liquid outlet pipe (20) extending out of the tank body (1) being provided at the bottom inside the tank body (1), a liquid outlet valve (21) being provided at one end of the liquid outlet pipe (20) extending out of the tank body (1), and a vertically arranged stirring shaft (18) being rotatably installed inside the tank body (1), with a stirring paddle (19) connected to the outer circumferential surface of the stirring shaft (18), characterized in that, A splash guard (24) is provided between the barrel (1) and the cover plate (10). The inner side of the splash guard (24) extends inward beyond the inner wall of the barrel (1) along the upper end of the barrel (1). The lower surface of the splash guard (24) extending inward beyond the inner wall of the barrel (1) forms an inwardly recessed annular flow-blocking step around the top of the barrel (1) between the inner surface of the splash guard (24) and the inner wall of the barrel (1).
2. The mixing tank for preventing oil sludge splashing according to claim 1, characterized in that, The bottom of the splash guard (24) is welded to the upper end face of the barrel (1), or a sealing ring is provided between the bottom of the splash guard (24) and the upper end face of the barrel (1).
3. The mixing tank for preventing oil sludge splashing according to claim 2, characterized in that, The outer side of the splash guard (24) extends beyond the outer wall of the barrel (1), and the outer edge of the cover plate (10) is located on the upper surface of the splash guard (24).
4. The mixing tank for preventing oil sludge splashing according to claim 1, characterized in that, A fixed bracket (14) is installed on the top of the cover plate (10), and a pulse level gauge (16) is installed on the top of the fixed bracket (14). A probe (17) is provided at the bottom of the pulse level gauge (16), and the probe (17) passes through the cover plate (10) and extends into the interior of the tank (1).
5. A mixing tank for preventing oil sludge splashing according to claim 1, characterized in that, A stirring motor (15) is installed at the top center of the cover plate (10). The output shaft of the stirring motor (15) passes through the cover plate (10) and is connected to the top of the stirring shaft (18). The bottom of the stirring shaft (18) is rotatably connected to the barrel body (1).
6. A mixing tank for preventing oil sludge splashing according to claim 1, characterized in that, The top of the barrel (1) is provided with a pressure relief pipe (22) extending out of the barrel (1), and a pressure relief valve (23) is provided at one end of the pressure relief pipe (22) extending out of the barrel (1).
7. A mixing tank for preventing oil sludge splashing according to claim 1, characterized in that, The top of the cover plate (10) is provided with an observation port, and an observation window cover (12) is detachably provided at the observation port.
8. A mixing tank for preventing oil sludge splashing according to claim 1, characterized in that, The barrel (1) has a hollow double-layer structure. The barrel wall of the barrel (1) is provided with a hollow cavity (3), and the hollow cavity (3) is provided with a heating element (4). The top side of the barrel (1) is provided with a filling pipe (5), and the bottom side of the barrel (1) is provided with a discharge pipe (6). The outlet end of the discharge pipe (6) is provided with a discharge valve (7). The filling pipe (5) and the discharge pipe (6) are both connected to the hollow cavity (3).
9. A mixing tank for preventing sludge splashing according to claim 8, characterized in that, The outer wall of the barrel (1) has a high liquid level window (8) and a low liquid level window (9). The height of the high liquid level window (8) is higher than that of the low liquid level window (9). Both the high liquid level window (8) and the low liquid level window (9) are connected to the hollow cavity (3).
10. A mixing tank for preventing oil sludge splashing according to claim 1, characterized in that, The bottom of the barrel (1) is provided with a fixed base (2).