Anti-clogging structure of a solid-liquid separation device for aquaculture

Abstract

This utility model relates to an anti-clogging structure for a solid-liquid separation device in aquaculture, aiming to solve the problems of easy clogging and harsh working environment in existing solid-liquid separation devices. The anti-clogging structure includes a screening cylinder and an internal spiral conveying assembly. The spiral blades of the spiral conveying assembly are equipped with multiple anti-clogging breaking teeth on their outer edge. The teeth extend in the same direction as the rotation of the spiral conveying assembly, forming forward-leaning cutting edges. These anti-clogging breaking teeth actively cut long fibers in the manure, while their tips scrape off sticky materials on the inner wall of the screening cylinder, achieving a dual anti-clogging effect of cutting and scraping. The double-layer screening cylinder structure forms a sealed space between the inner and outer cylinders for collecting liquid materials, which are then discharged through the liquid outlet on the outer cylinder, effectively preventing odor overflow and wastewater runoff. This anti-clogging structure not only significantly improves the anti-clogging performance and operational stability of the equipment but also optimizes the working environment, possessing high practical value and environmental benefits.

Description

Technical Field

[0001] This utility model relates to the technical field of waste treatment equipment for aquaculture, specifically to an anti-clogging structure for a solid-liquid separation device for aquaculture. Background Technology

[0002] In modern large-scale animal husbandry, solid-liquid separation of livestock manure is a crucial step in environmental protection. Screw extruders are widely used equipment, employing a screw conveyor within a screening cylinder to compress the manure, forcing the liquid phase through the screen holes and discharging, while the solid phase is pushed to the end for discharge. However, existing screw extruders generally suffer from the following technical problems when processing actual livestock manure: (1) Severe clogging problem: Livestock manure often contains a large amount of long fiber materials such as straw and forage. These fibers are very easy to get tangled on the spiral blades or rotating main shaft, forming clumps, which hinders material transportation and may even cause the equipment to stop. At the same time, the sticky components in the manure are easy to clog the screen holes of the screening cylinder, i.e., the "clogging" phenomenon, which greatly reduces the efficiency of liquid phase separation.

[0003] (2) Harsh working environment: The screening cylinder of traditional solid-liquid separators is mostly open or semi-open structure. The separated liquid material drips directly into the collection tank or ground below, resulting in sewage flowing everywhere, foul smell, poor hygiene conditions, and adverse effects on the health of operators and the surrounding environment.

[0004] Therefore, how to design a solid-liquid separation device that can effectively prevent clogging, ensure long-term stable operation, and improve the working environment is a technical problem that urgently needs to be solved in this field. Utility Model Content

[0005] The technical problem to be solved by this utility model is to address the issues of easy clogging, unstable operation, and harsh working environment of existing solid-liquid separation devices due to fiber entanglement and screen clogging, and to provide an anti-clogging structure for a solid-liquid separation device in aquaculture.

[0006] To solve the above-mentioned technical problems, the anti-clogging structure of this solid-liquid separation device for aquaculture includes a screening cylinder and a spiral conveying assembly rotatably installed inside the screening cylinder. The spiral conveying assembly includes a rotating main shaft and spiral blades fixed around the rotating main shaft. The spiral blades are provided with multiple anti-clogging and breaking teeth at intervals along their outer edge. The tips of the anti-clogging and breaking teeth are pre-set with a scraping gap between them and the inner wall of the screening cylinder. The extension direction of the anti-clogging and breaking teeth is the same as the rotation direction of the spiral conveying assembly and forms a forward-leaning acute angle with the outer edge of the spiral blades to form a cutting edge facing the material.

[0007] Furthermore, the anti-blocking and demolition teeth are continuous C-shaped sawtooth structures.

[0008] Furthermore, the anti-blocking and demolition teeth are serrated or trapezoidal tooth structures arranged at intervals.

[0009] Specifically, the size of the scraping gap is 0.5mm to 1.5mm.

[0010] In an optimized configuration, the axis of the screening cylinder is inclined, and its discharge end is higher than its feed end.

[0011] The optimized screening cylinder has a double-layer cylinder structure, which includes an inner screen cylinder and an outer cylinder arranged coaxially, and an interlayer space for collecting liquid is formed between the inner screen cylinder and the outer cylinder; the screw conveyor assembly is installed inside the inner screen cylinder; and the outer cylinder has a liquid discharge port on its wall.

[0012] Furthermore, the outer cylinder is provided with one or more flushing ports on its wall and a drain port at its bottom.

[0013] This utility model discloses an anti-clogging structure for a solid-liquid separation device in aquaculture. By adding forward-inclined anti-clogging and breaking teeth to the spiral blades, it achieves active cutting of long fibers in the material and simultaneous scraping of sticky substances on the cylinder wall, fundamentally solving the clogging problem. Combined with an optional double-layer sealed cylinder, it integrates solid-liquid separation with environmentally friendly storage, taking into account both the requirements of efficient operation and environmental hygiene. This makes the overall structure of the device advanced, stable in operation, and environmentally friendly and practical. Attached Figure Description

[0014] The anti-clogging structure of the solid-liquid separation device for aquaculture according to this utility model will be further described below with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the solid-liquid separation device for aquaculture. Figure 2 yes Figure 1 The left view; Figure 3 yes Figure 1 A side-view stereoscopic view; Figure 4 yes Figure 1 A three-dimensional view viewed from below; Figure 5 yes Figure 2 BB-direction cross-section; Figure 6 yes Figure 1 A cross-sectional view along line AA in embodiment 1; Figure 7 yes Figure 6 A three-dimensional structural diagram; Figure 8 yes Figure 5 The middle C section is shown in a partial enlarged view in Embodiment 1; Figure 9yes Figure 1 A cross-sectional view along line AA in embodiment 2; Figure 10 yes Figure 9 A three-dimensional structural diagram; Figure 11 yes Figure 5 The middle C section is a partial enlarged view in Embodiment 2.

[0015] In the picture: 1-Screening cylinder; 11-Inner screen cylinder; 12-Outer cylinder; 13-Interlayer space; 14-Liquid discharge port; 15-Rinsing port; 16-Drainage port; 2-Screw conveyor assembly; 21-Rotating main shaft; 22-Screw blades; 23-Anti-blocking and breaking teeth. Detailed Implementation

[0016] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0017] In the description of this utility model, it should be understood that the terms "left", "right", "front", "rear", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] The present invention will be further described below with specific embodiments, but the scope of protection of the present invention is not limited to the following embodiments.

[0019] Implementation method 1: such as Figures 1 to 8As shown, the anti-clogging structure of this solid-liquid separation device for aquaculture includes a screening cylinder 1 and a spiral conveying assembly 2 rotatably installed inside the screening cylinder 1. The spiral conveying assembly 2 includes a rotating main shaft 21 and spiral blades 22 fixed around the rotating main shaft 21. Each spiral blade 22 has multiple anti-clogging breaking teeth 23 spaced circumferentially along its outer edge. A scraping gap is pre-set between the tips of the anti-clogging breaking teeth 23 and the inner wall of the screening cylinder 1. The extending direction of the anti-clogging breaking teeth 23 is the same as the rotation direction of the spiral conveying assembly 2, and forms a forward-leaning acute angle with the outer edge of the spiral blades 22 to constitute a cutting edge facing the material. Anti-clogging breaking teeth are added to the conventional spiral blades, and a scraping gap is formed between the teeth and the cylinder wall. When the screw conveyor assembly rotates, the anti-clogging and breaking teeth rotate accordingly. Their forward-leaning cutting edges actively cut and break up the entangled long fibers in the sewage. Simultaneously, the tooth tips scrape the inner wall of the screening cylinder in a non-contact manner, peeling away sticky material that is about to clog the screen holes. This dual action of cutting and scraping solves the clogging problem caused by fiber entanglement and screen hole blockage in traditional screw extruders, ensuring long-term stable operation and high solid-liquid separation efficiency. The extension direction and tooth shape design of the anti-clogging and breaking teeth create a forward-leaning structure facing the direction of rotation, thus forming a sharp cutting edge against the material during rotation.

[0020] The anti-clogging and breaking teeth 23 are continuous C-shaped sawtooth structures. A continuous sawtooth structure is formed on the edge of the spiral blades, with sharp apexes and sharp side edges, focusing on cutting performance, making it particularly suitable for processing livestock manure containing a large amount of long fibers such as straw and forage. The scraping gap is 0.5mm to 1.5mm. This gap size ensures that the tooth tips effectively scrape off the attached dirt while avoiding hard friction with the screening cylinder, effectively reducing equipment wear and operating noise, and extending service life. The axis of the screening cylinder 1 is inclined, and its discharge end is higher than its inlet end. Gravity assists in the initial separation of the liquid phase and increases the compression stroke and force of the solid material within the cylinder, resulting in drier discharged solid material and improving overall separation efficiency and effect.

[0021] Implementation method 2: such as Figures 9 to 11 As shown, this embodiment is a variation of embodiment 1. Its main difference from embodiment 1 lies in the structure of the anti-blocking and breaking teeth 23. The anti-blocking and breaking teeth 23 are a structure of spaced-apart saw teeth and trapezoidal teeth. The tops of the trapezoidal teeth are relatively flat, focusing more on scraping performance. They can efficiently clean the sticky material stuck to the inner wall of the screen like a scraper, keeping the screen holes unobstructed. Through alternating combinations with the saw teeth, a balanced and efficient synergy of cutting and scraping performance is achieved. The remaining structures and components are as described in embodiment 1 and will not be repeated.

[0022] Implementation method 3: such as Figure 1 ,3 As shown in Figure 11, this embodiment is an optimization and upgrade of the screening cylinder 1 based on any of the aforementioned embodiments, providing an optimal environmentally friendly implementation scheme. The screening cylinder 1 has a double-layer cylinder structure, including an inner screen cylinder 11 and an outer cylinder 12 arranged coaxially, with a sandwich space 13 formed between the inner screen cylinder 11 and the outer cylinder 12 for collecting liquid materials; the screw conveyor assembly 2 is installed inside the inner screen cylinder 11; and the outer cylinder 12 has a liquid discharge port 14 on its cylinder wall. This double-layer cylinder structure realizes the closed collection and discharge of the separated liquid materials, fundamentally solving the problems of sewage overflow and odor overflow in traditional open separators, greatly improving the sanitary conditions of the working environment, and enhancing the environmental protection standards and overall added value of the equipment. The outer cylinder 12 also has one or more flushing ports 15 on its cylinder wall and a drain port 16 at its bottom. The added flushing ports and drain ports provide a convenient maintenance channel for cleaning the sandwich space between the inner and outer cylinders. Regular flushing with tools such as high-pressure water guns can effectively solve the problem of sludge deposition that may occur in the interlayer space, ensuring the maintainability and long-term stable operation of the equipment, and making the double-layer cylinder structure more practical in engineering. The remaining structures and components are as described in Embodiment 1 and will not be described again.

[0023] During operation: The motor drives the main shaft 21 to rotate, and the spiral blades 22 and anti-clogging breaking teeth 23 rotate synchronously. For long fibers mixed in the sewage, the forward-leaning cutting edge actively cuts and shreds them like a planer, preventing them from entangled on the main shaft or blades. At the same time, during rotation, the tips of the anti-clogging breaking teeth 23 sweep across the inner wall of the screening cylinder 1 with a very small, non-contact scraping gap, like a scraper, peeling off the sticky material layer adhering to the screen holes that is about to cause clogging. Through this synergistic effect of cutting and scraping, the two main causes of clogging are effectively solved, ensuring the smooth operation of the equipment.

[0024] This solid-liquid separation device for aquaculture employs an anti-clogging structure that adds forward-inclined anti-clogging breaking teeth to the spiral blades. This achieves active cutting of long fibers in the material and simultaneous scraping of sticky substances on the cylinder wall, fundamentally solving the clogging problem. Combined with an optional double-layer sealed cylinder, it integrates solid-liquid separation with environmentally friendly storage, balancing the dual requirements of high-efficiency operation and environmental hygiene. This results in an advanced overall structure, stable operation, and environmentally friendly practicality. Specifically, (1) Dual anti-clogging and stable operation: By innovatively setting forward-leaning anti-clogging and breaking teeth on the spiral blades, the long fibers in the sewage can be actively cut and broken during rotation, avoiding the problem of fiber entanglement from the source; at the same time, the tooth tips scrape the inner wall of the screen cylinder in a non-contact manner, effectively peeling off sticky materials and preventing the screen holes from becoming clogged. The dual action of cutting and scraping greatly improves the anti-clogging ability of the equipment and ensures long-term, efficient and stable operation.

[0025] (2) Environmentally friendly and hygienic: By adopting a double-layer cylinder structure, the separated liquid material is completely sealed in the interlayer space between the inner and outer cylinders for collection and discharge, which completely solves the problems of sewage overflow and odor overflow of traditional equipment, significantly improves the working environment of the farm, and meets modern environmental protection requirements.

[0026] (3) Easy maintenance and durable: The flushing port and drain port added to the double-layer cylinder structure greatly facilitate the daily maintenance of the equipment, making it easy to clean the deposited dirt in the interlayer space and extending the service life of the equipment. At the same time, the design of the scraping gap avoids hard friction, reducing component wear and operating noise.

[0027] (4) Efficient separation and drier solids: The inclined setting of the screening cylinder utilizes gravity to assist separation and increases the extrusion stroke, resulting in a lower moisture content of the final discharged solids and improving the value of resource utilization.

[0028] The above description illustrates the main features, basic principles, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments or examples described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the above embodiments or examples should be considered exemplary and not restrictive. The scope of this utility model is defined by the appended claims rather than the foregoing description, and therefore all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0029] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A clog-proof structure for a solid-liquid separation device in aquaculture, comprising a screening cylinder (1) and a spiral conveying assembly (2) rotatably installed inside the screening cylinder (1); characterized in that: The spiral conveying assembly (2) includes a rotating main shaft (21) and spiral blades (22) fixed around the rotating main shaft (21); wherein, The spiral blade (22) is provided with multiple anti-blocking and breaking teeth (23) spaced apart along its outer edge. The tip of the anti-blocking and breaking teeth (23) is pre-set with a scraping gap between it and the inner wall of the screening cylinder (1). The extension direction of the anti-blocking and breaking teeth (23) is the same as the rotation direction of the spiral conveying assembly (2), and forms a forward-leaning acute angle with the outer edge of the spiral blade (22) to form a cutting edge facing the material.

2. The anti-clogging structure of the solid-liquid separation device for aquaculture according to claim 1, characterized in that: The anti-blocking and breaking teeth (23) are continuous C-shaped sawtooth structures.

3. The anti-clogging structure of the solid-liquid separation device for aquaculture according to claim 1, characterized in that: The anti-blocking and breaking teeth (23) are serrated and trapezoidal tooth structures arranged at intervals.

4. The anti-clogging structure of the solid-liquid separation device for aquaculture according to claim 1, characterized in that: The size of the scraping gap is 0.5 mm to 1.5 mm.

5. The anti-clogging structure of the solid-liquid separation device for aquaculture according to claim 1, characterized in that: The screen cylinder (1) has its cylinder axis inclined, and its discharge end is higher than its feed end.

6. The anti-clogging structure of the solid-liquid separation device for aquaculture according to any one of claims 1 to 5, characterized in that: The screening cylinder (1) is a double-layer cylinder structure, which includes an inner screen cylinder (11) and an outer cylinder (12) arranged coaxially. An interlayer space (13) for collecting liquid is formed between the inner screen cylinder (11) and the outer cylinder (12). The screw conveyor assembly (2) is installed inside the inner screen cylinder (11). The outer cylinder (12) is provided with a liquid discharge port (14) on its cylinder wall.

7. The anti-clogging structure of the solid-liquid separation device for aquaculture according to claim 6, characterized in that: The outer cylinder (12) is also provided with one or more flushing ports (15) on its cylinder wall and with a drain port (16) at its bottom.

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