A self-discharging liquid storage tank with an array of 45-degree inclined guide plates

Abstract

The utility model discloses a kind of internally 45-degree inclined flow guide plate array self-discharge residue liquid storage tanks, it is related to industrial waste liquid temporary storage technical field.The existing settlement type liquid storage tank is layered by standing, residue is long accumulated tank bottom, need to stop machine manual residue and easy to block drain valve, affect continuous production.To solve the above-mentioned pain point, the utility model is installed in cylindrical tank "45 ° spiral flow guide plate, rotating drive shaft, conical liquid storage tank" combination: residue liquid is injected after being injected into by top liquid inlet, is guided by limiting plate wall adhesion and rotates with flow guide plate low speed, particle is quickly slid along inclined plate outer edge under centrifugal force, gravity double action, clear liquid then is centripetal to drop to conical waist static area through board joint;Residue is finally converged conical bottom, is quantitatively released by side wall residue discharge port, realizes automatic residue without stopping machine.Structure is only by main body, liquid inlet, drive motor, drive shaft, limiting plate, spiral flow guide plate, conical liquid storage tank, residue discharge port and liquid tank baffle nine big pieces welding or bolt assembly, manufacturing is simple, maintenance quantity is low.

Description

Technical Field

[0001] This utility model relates to the field of industrial waste liquid temporary storage technology, specifically a self-draining slag and liquid storage tank with an internal 45-degree inclined guide plate array. Background Technology

[0002] Existing liquid production or processing processes require intermediate storage tanks to balance process fluctuations, settle impurities, and temporarily store liquids awaiting processing. Traditional storage tanks are mostly cylindrical straight-walled or conical-bottomed containers with open interiors and simple structures, relying on natural sedimentation to separate solids. An existing anti-clogging storage tank (publication number: CN213200887U) has the following drawbacks and requires further improvement.

[0003] In the long-term operation of such straight-walled or simple conical-bottom tanks, a large amount of solid particles are prone to accumulate at the bottom of the tank. It is necessary to stop the machine periodically for manual cleaning. If it is not cleaned in time, the sludge will block the bottom discharge valve, resulting in prolonged downtime, high labor intensity for personnel, and even affecting the continuity of subsequent processes.

[0004] To reduce manual maintenance, some improvement solutions add a stirring paddle or a spiral scraper mechanism to the bottom of the tank. However, mechanical slag removal methods have drawbacks such as complex structure, high energy consumption, strict sealing requirements, many wear parts, and high maintenance costs. When processing slurries containing fibers or with high viscosity, the stirring paddle is prone to getting tangled and stuck, and there are dead corners inside the equipment. Utility Model Content

[0005] The main purpose of this utility model is to provide a self-draining slag and liquid storage tank with an internal 45-degree inclined guide plate array, which can effectively solve the problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a self-draining slag and liquid storage tank with an internal 45-degree inclined guide plate array. The upper center of the main body is connected to a liquid inlet via a flange. A drive motor is bolted to the top of the main body via a bracket. The output shaft of the drive motor is coaxially connected to a drive shaft that runs from top to bottom through the main body. A limiting plate passes through and is keyed to the middle section of the drive shaft. The limiting plate is fixed to the upper part of the inner cavity of the main body. The outer edge of the limiting plate is press-fitted with the inner wall of the main body to limit the liquid to flow downward along the inner wall of the main body. The guide plates are spirally distributed along the drive shaft at a 45° angle and are sequentially welded to the drive shaft and supported on the inner wall of the main body, forming a spiral descending channel between the guide plates. The bottom of the main body is integrally stamped into a conical liquid storage tank. Its lowest point is connected to a slag discharge port located on the lower side wall of the main body by welding. A liquid tank baffle is set between the outer side of the slag discharge port and the side wall of the main body. The liquid tank baffle is welded to the main body to form a barrier, separating the clear liquid in the upper part of the storage tank from the slag liquid discharge channel.

[0007] Preferably, the guide plates are all made of 304 stainless steel plates with a thickness of 2-4mm, and are arranged spirally with an equidistant pitch of 20-50mm along the drive shaft axis; the inner edge of the guide plate is fully welded to the drive shaft with a circumferential weld, and the outer edge is welded to the inner wall of the main body with a spacing of 10-15mm.

[0008] Preferably, the cone angle of the liquid storage tank is 50°-70° and the tank wall thickness is 4-6mm; a slag discharge hole with a diameter of 40-60mm is opened at the center of the tank bottom and is connected to the slag discharge port through a full penetration weld.

[0009] Preferably, the slag discharge port and the main body are butt welded with a V-groove, and the weld penetration depth is not less than 4mm; the angle between the axis of the slag discharge port and the horizontal plane is 0°±1°.

[0010] Preferably, the drive shaft and the output shaft of the drive motor are connected by a parallel key with a key width of 8mm±0.2mm and a key length of 40mm±1mm. The key and the keyway are H9 / h9 fit.

[0011] Preferably, the outer diameter of the limiting plate is 0.15mm to 0.30mm larger than the inner diameter of the main body, and it is fixed by cold pressing interference assembly; the thickness of the limiting plate is 8mm ± 1mm.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This invention adds a 45° spiral guide plate inside the tank, along with a conical liquid storage tank and an external slag discharge port, so that solid impurities are continuously "slid" to the bottom during the liquid descent and discharged quantitatively without stopping the machine. Compared with traditional liquid storage tanks that rely on static settling and manual slag removal, it can avoid frequent shutdowns, valve blockages and high-intensity manual cleaning, significantly improve continuous production efficiency and extend the service life of the tank.

[0014] Meanwhile, the entire slag separation process can be completed by gravity and low-speed rotation, without the need to install high-power stirring paddles or slag scraping mechanisms. The structure is simple, energy consumption is low, and sealing requirements are relaxed. All welded parts are conventional sheet metal parts, which are easy to process and replace, eliminating the high maintenance costs and secondary fault risks caused by complex transmission, vulnerable seals and bearing wear, as well as fiber entanglement, material sticking dead corners, etc. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the internal component structure of this utility model.

[0017] In the diagram: 1. Main body; 2. Drive motor; 3. Liquid inlet; 4. Slag outlet; 5. Liquid tank baffle; 6. Liquid storage tank; 7. Drive shaft; 8. Limiting plate; 9. Guide plate. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0019] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] Example

[0022] Please see Figure 1-2 This utility model provides a technical solution:

[0023] A self-draining slag and liquid storage tank with an internal 45-degree inclined guide plate array is provided. The upper center of the main body 1 is connected to a liquid inlet 3 via a flange. A drive motor 2 is bolted to the upper part of the main body 1 via a bracket. The output shaft of the drive motor 2 is coaxially connected to a drive shaft 7 that runs from top to bottom through the main body 1. A limiting plate 8 is keyed through the middle section of the drive shaft 7. The limiting plate 8 is fixed to the upper part of the inner cavity of the main body 1. The outer edge of the limiting plate 8 is press-fitted with the inner wall of the main body to limit the liquid flow downwards along the inner wall of the main body 1. The guide plate 9... The guide plates 9 are spirally distributed along the drive shaft 7 at a 45° angle and sequentially welded to the drive shaft 7 and supported on the inner wall of the main body 1. A spiral descending channel is formed between the guide plates 9. The bottom of the main body 1 is integrally stamped into a conical liquid storage tank 6. Its lowest point is connected to the slag discharge port 4 located on the lower side wall of the main body 1 by welding. A liquid tank baffle 5 is set between the outer side of the slag discharge port 4 and the side wall of the main body 1. The liquid tank baffle 5 is welded to the main body 1 to form a barrier. The clear liquid in the upper part of the liquid storage tank 6 is separated from the slag liquid flow channel discharged from the slag discharge port 4.

[0024] In this embodiment, a cylindrical body with a diameter of 1200mm and a height of 1600mm is selected. A DN80 liquid inlet is welded to the center of the top flange, and a graphite gasket is tightened with 4×M16 bolts to achieve a seal. A 1.5kW geared drive motor with a speed of 60r / min is fixed to the outside of the main body top cover by a steel bracket. The output shaft of the motor is coaxially connected to a solid carbon steel drive shaft via a flexible pin coupling. The drive shaft runs from top to bottom through the main body 1 and all internal components and extends into the center of the liquid storage tank by about 50mm.

[0025] The limiting plate is made of 8mm thick 304 stainless steel round plate, with an outer diameter 0.2mm larger than the inner diameter of the main body. It is pressed into the upper end of the inner cavity of the main body 1 by liquid nitrogen micro-cooling expansion, forming an H7 / S6 interference fit. Its outer edge is tightly attached to the inner wall, and a through hole matching the drive shaft is opened in the center. The hole diameter is 0.1mm larger than the shaft diameter to ensure rotation clearance. The limiting plate and the drive shaft are firmly keyed together with a flat key, which serves both axial positioning and torque transmission to the lower guide plate. The function of the limiting plate is to force the liquid to flow downward along the wall and prevent the liquid from forming a short circuit backflow in the top cover area.

[0026] The guide plate is made of 3mm thick 304 stainless steel plate, which is pre-bent into a 45° slope by CNC bending, and then spirally welded to the outer circle of the drive shaft from top to bottom with equal 30mm pitch threads. Every 30°, a 12mm long and short weld is made at the outer edge and tack welded to the inner wall of the main body, forming a continuously descending spiral slide. The adjacent upper and lower covers of the guide plate have a central angle of approximately 140°, causing the liquid to fall in a "rotating waterfall" style under the combined action of rotation and gravity. Heavy particles slide down the inclined plate rapidly, while the liquid phase swirls back along the gaps between the inclined plates.

[0027] The lower part of the main body is integrally spun into a 65° conical bottom liquid storage tank with a wall thickness of 5mm. A φ50mm through-hole is opened at the lowest point of the cone bottom and fully welded to form a slag discharge port. The outer flange of the slag discharge port is reserved with 4×M16 through holes for connection with external pipelines or valves. The liquid tank baffle is an arc-shaped baffle piece, welded around the circumference 100mm above the slag discharge port, and wraps around the axis at about 120° to form a liquid barrier; its lower edge is 60mm from the cone apex, so that the clear liquid cannot directly enter the slag discharge port and must overflow into the liquid storage tank.

[0028] The slag-containing waste liquid is injected from the inlet at an inlet center of the tank top under an inlet pressure of 0.05–0.10 MPa. It first impacts the upper surface of the limiting plate and is forced to turn towards the inner wall of the main body. At this time, the drive motor drives the drive shaft and the entire row of guide plates to rotate synchronously at a low speed of 20–30 r / min; the tangential linear velocity at an effective radius of 600 mm is approximately 1.25 m / s, which can create a gentle rotating shear field within the liquid column without excessively disturbing the sediment. The liquid descends along the wall under the combined action of three forces:

[0029] 1. The weak centrifugal force generated by rotation pushes denser particles toward the outer edge;

[0030] 2. The 45° inclination angle of the inclined plate causes the particles to accelerate along the plate surface in a "slide" manner under the action of the gravitational component;

[0031] 3. The equidistant arrangement of the 30mm pitch allows the fluid to fall in layers and constantly refresh the contact interface, avoiding the accumulation of solids on a single plane.

[0032] On each guide plate, the liquid is separated into thin layers; the settling velocity of solid particles is proportional to the gravitational component of the decomposition in the normal direction of the inclined plate, while the flow velocity of the liquid phase along the plate surface is only 0.1–0.2 m / s, forming a contrast of "fast settling and slow flow". The gaps between the guide plates create a centripetal backflow channel, where light liquid is drawn back to the axis along the inner edge and drips from the lower edge of the guide plate to the next layer. When the liquid reaches the outlet of the lowest guide plate, more than 95% of the primary sediment has been transferred to the outer edge; the particles are further thrown towards the inner wall of the conical storage tank by inertia along the spiral path and slide into the top of the cone. Due to the steep 65° slope angle of the cone bottom and the obstruction of the liquid tank baffle, the clear liquid and the highly concentrated sediment are completely separated in space: the clear liquid flows back naturally from the waist of the cone to the central quiet zone for accumulation, while the concentrated sediment accumulates at the tip of the cone. When the height of the slag layer at the cone tip is level with the center line of the slag discharge port, opening the external valve allows the high-solids-content slurry to be discharged based on the static pressure difference, while the clear liquid is blocked by the baffle and will not be carried away. The entire cycle does not require shutdown, and the continuous rotation provides a dual driving force of "gravity and gentle agitation," which ensures separation efficiency while avoiding the high energy consumption and entanglement failure problems of impeller-type machinery, thus achieving a stable and reproducible online slag discharge process.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A self-draining slag storage tank with an internal 45-degree inclined baffle array, comprising a main body (1), a storage tank (6), and baffles (9), characterized in that: The upper center of the main body (1) is connected to a liquid inlet (3) via a flange. A drive motor (2) is bolted to the top of the main body (1). The output shaft of the drive motor (2) is coaxially connected to a drive shaft (7) that runs from top to bottom through the main body (1). The middle section of the drive shaft (7) passes through and is keyed to a limiting plate (8). The limiting plate (8) is fixed to the upper part of the inner cavity of the main body (1). The outer edge of the limiting plate (8) is press-fitted with the inner wall of the main body, limiting the liquid to flow downwards along the inner wall of the main body (1). The guide plate (9) is inclined at a 45° angle along the drive shaft (… 7) The spiral distribution is sequentially welded to the drive shaft (7) and supported on the inner wall of the main body (1). The guide plates (9) form a spiral descending channel. The bottom of the main body (1) is integrally stamped into a conical liquid storage tank (6). Its lowest point is connected to the slag discharge port (4) located on the lower side wall of the main body (1) by welding. A liquid tank baffle (5) is set between the outer side of the slag discharge port (4) and the side wall of the main body (1). The liquid tank baffle (5) is welded to the main body (1) to form a barrier. The clear liquid in the upper part of the liquid storage tank (6) is separated from the slag liquid discharged from the slag discharge port (4).

2. The self-draining slag storage tank with an internal 45-degree inclined guide plate array as described in claim 1, characterized in that: The guide plates (9) are all made of 304 stainless steel plates with a thickness of 2-4mm, and are arranged spirally with an equidistant pitch of 20-50mm along the axial direction of the drive shaft (7); the inner edge of the guide plate (9) is fully welded to the drive shaft (7), and the outer edge is welded to the inner wall of the main body (1) with a spacing of 10-15mm.

3. A self-draining slag and liquid storage tank with an internal 45-degree inclined guide plate array as described in claim 1, characterized in that: The storage tank (6) has a cone angle of 50°-70° and a wall thickness of 4-6mm; a slag discharge hole with a diameter of 40-60mm is opened at the center of the bottom of the tank and is connected to the slag discharge port (4) through a full penetration weld.

4. A self-draining slag storage tank with an internal 45-degree inclined guide plate array as described in claim 1, characterized in that: The slag discharge port (4) and the main body (1) are butt welded with a V-shaped groove, and the weld penetration depth is not less than 4mm; the angle between the axis of the slag discharge port (4) and the horizontal plane is 0°±1°.

5. A self-draining slag and liquid storage tank with an internal 45-degree inclined guide plate array as described in claim 1, characterized in that: The drive shaft (7) is connected to the output shaft of the drive motor (2) by a parallel key. The key width is 8mm±0.2mm, the key length is 40mm±1mm, and the key and keyway are H9 / h9 fit.

6. A self-draining slag storage tank with an internal 45-degree inclined guide plate array as described in claim 1, characterized in that: The outer diameter of the limiting plate (8) is 0.15mm to 0.30mm larger than the inner diameter of the main body (1), and it is fixed by cold pressing interference assembly; the thickness of the limiting plate (8) is 8mm ± 1mm.

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