Wastewater treatment equipment for modern pig farms

Abstract

This invention relates to the field of wastewater treatment technology and discloses a wastewater treatment device for a modern pig farm. The device includes a conical filter structure installed inside a liquid filtration chamber, capable of filtering liquid entering the chamber through the inlet port and being discharged through the main discharge pipe. This wastewater treatment device for modern pig farms can filter feces from the cleaning liquid, thereby separating the liquid and feces for convenient subsequent independent treatment. Furthermore, the device utilizes screw feeding and elastic damping to directionally compress and clean accumulated feces, thus enabling continuous solid-liquid separation to ensure the filtration efficiency of the equipment.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a wastewater treatment device for modern pig farms. Background Technology

[0002] In existing pig farms, wastewater is discharged directly after being treated by equipment. In the initial stage of wastewater treatment, it is necessary to filter out large impurities in the wastewater. After a period of time, the existing filter screens are prone to clogging and need to be cleaned. At this time, the staff need to use tools to disassemble the filter screens for cleaning, which is time-consuming, labor-intensive, and increases the workload of the staff.

[0003] To this end, Chinese Patent Publication No. CN223766167U discloses "A Wastewater Treatment Equipment for a Modern Pig Farm," whose main structure includes a sewage pipe: a filter tank is fixedly connected to the right end of the sewage pipe; a cover plate structure is provided on the upper side of the filter tank; fixing blocks are fixedly connected to the front and rear sides inside the filter tank; a sliding groove is opened on the outer side of the fixing block; a frame block is provided inside the sliding groove; the frame block is shaped like a "U" and a filter screen is fixedly connected to its inner side; a disassembly structure is provided between the fixing block and the frame block; a water pipe is fixedly connected to the right side of the filter tank; a water pump is fixedly connected to the right end of the water pipe; a second water pipe is fixedly connected to the output end of the water pump; and a water storage tank is fixedly connected to the output end of the second water pipe. The disassembly structure and cover plate structure facilitate manual disassembly of the filter screen for cleaning or replacement by workers, making it convenient, quick, time-saving, and labor-saving, reducing the workload of workers.

[0004] The wastewater treatment equipment in the aforementioned modern pig farms needs to be shut down when cleaning up manure, and a large number of personnel are still required to dismantle the corresponding equipment and carry out cleaning work. Summary of the Invention

[0005] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a wastewater treatment device for modern pig farms that can filter manure from cleaning liquids, thereby separating the liquid and manure for convenient subsequent independent treatment processes. Furthermore, the device utilizes screw feeding and elastic damping to directionally compress and clean accumulated manure, thus enabling uninterrupted solid-liquid separation to ensure the filtration efficiency of the equipment and solve the aforementioned technical problems.

[0006] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: a wastewater treatment device for a modern pig farm, comprising a drive motor with a fixed base plate installed at the bottom, a pipe shell with a fixed structure at one end, a cylindrical pipe body structure located at the arc-shaped discharge port of the pipe shell, a liquid filter chamber located on the pipe shell with its discharge end connected to the inlet port of the cylindrical pipe body structure, and a main discharge pipe located on one side of the circumferential surface of the pipe shell for discharging the filtered liquid, and further comprising a conical surface filter structure installed inside the liquid filter chamber for filtering the liquid entering the inlet port of the liquid filter chamber and discharged outward through the main discharge pipe; and a spiral linkage structure installed inside the cylindrical pipe body structure and the liquid filter chamber and rotating with the rotor end of the drive motor. When the spiral linkage structure rotates, it can drive the conical surface filter structure to rotate, and using the spiral conveying principle, it can directionally convey small particles located near the spiral impeller structure, and install an elastic blocking structure at the discharge port of the cylindrical pipe body structure, which can elastically block the accumulated particles formed by the spiral linkage structure.

[0007] Through the above technical solutions, this equipment can efficiently filter fecal impurities in aquaculture wastewater, achieving complete separation of liquid and solid feces, providing a good foundation for subsequent independent treatment processes such as wastewater purification and fecal resource utilization; at the same time, the equipment adopts a continuous operation design, which can stably complete solid-liquid separation without stopping or interrupting operation, effectively avoiding filter clogging and processing interruption, and maintaining high-efficiency filtration performance and stable working status for a long time.

[0008] Preferably, a backwashing port is provided on one side of the circumferential surface of the pipe shell, which allows for the injection of reverse-flowing liquid into the conical filter structure.

[0009] The above technical solution works as follows: After prolonged filtration of feces, some small pieces of feces may become stuck in the gaps of the conical filter cloth. At this time, high-pressure liquid is injected through the backwashing port to block the main discharge pipe. The high-pressure liquid will then enter the pipe shell in reverse through the filter gaps of the conical filter cloth. The reverse flow of high-pressure water can impact the blocked feces, thereby causing the feces to fall off.

[0010] Preferably, the conical surface filter structure includes a first annular body and a second annular body. The annular portion of the first annular body is provided with a conical guide plate facing the second annular body. One end of the conical guide plate is provided with a liquid concentrating flow channel. The center of the conical guide plate is provided with a uniformly shaped conical flow cavity. The center of the liquid concentrating flow channel is provided with a cylindrical liquid flow cavity. A conical filter cloth symmetrical to the shape of the conical guide plate structure is embedded between the liquid concentrating flow channel and the second annular body. The conical filter cloth, in a taut state, is shaped by a group of limiting rods arranged in a multiple annular array. The center of the conical filter cloth forms an anti-conical flow cavity symmetrical to the positive conical flow cavity. A rod mounting groove is provided on the inner side of the circumferential surface of the second annular body. The annular bodies of the first and second annular bodies are rotatably installed in the inner wall structure of the pipe shell through a mechanical sealing structure. The flow areas of the main discharge pipe and the backwash cleaning port are located in the closed area between the first and second annular bodies. Each set of limiting rods includes two limiting rods, which are distributed on the upper and lower corresponding parts of the conical surface of the conical filter cloth, so that the conical filter cloth is clamped in the area between the two limiting rods.

[0011] Through the above technical solution: after the water flows in, it will enter the interior of the reverse conical flow chamber through the positive conical flow chamber and the cylindrical liquid flow chamber. The feces can be screened by the filtration of the side of the conical filter cloth. Due to the conical structure and inclined surface of the conical filter cloth, when the liquid backflow formed by the inclined angle enters the interior of the main discharge pipe, the main flow direction of the feces is towards the cylindrical pipe structure. This design allows most of the feces to directly enter the interior of the cylindrical pipe structure, and a small amount of feces will be filtered through the conical filter cloth, reducing the occurrence of clogging and improving the filtration efficiency.

[0012] Preferably, the spiral linkage structure includes a main rotating shaft inserted into the cylindrical pipe structure and the liquid filtration chamber. One end of the main rotating shaft is connected to the rotor end of the drive motor via a coupling. A spiral impeller structure is provided on the shaft inside the cylindrical pipe structure. The other end of the main rotating shaft is provided with an annular protrusion structure. A conical guide structure is provided on the end face of the annular protrusion structure facing the liquid inlet of the pipe shell. The circumferential surface of the annular protrusion structure is fixedly connected to each rod mounting groove by corresponding fixing rods. When the spiral impeller structure rotates clockwise with the drive motor, it can generate a material conveying direction towards the drive motor.

[0013] Through the above technical solution: when the spiral impeller structure rotates with the drive motor, the feces located around it can be spirally conveyed to form an accumulation state, realizing the flow-type removal of feces. In addition, during the rotation, the fixed rod can drive the conical filter cloth to rotate. The rotating conical filter cloth can continuously move relative to the feces attached to its surface, thereby accelerating the speed at which the feces move around the conical filter cloth, and thus accelerating the efficiency of feces removal.

[0014] Preferably, the elastic blocking structure includes a fixed plate, the center of which is provided with a fitting hole for fixing and fitting onto the liquid discharge port of the cylindrical pipe structure. A movable plate is placed on the end face of the fixed plate located at the drive motor, which can move away from or towards the fixed plate. The center of the movable plate is provided with a movable hole that fits onto the main rotating shaft. Multiple horizontal and circularly arrayed limiting shafts are fixedly installed on the end face of the movable plate facing the cylindrical pipe structure. The shaft of each limiting shaft corresponds to a movable hole in the fixed plate structure, and a limiting plate is installed on its end face. A main helical spring in a compressed state is fitted on the shaft between the fixed plate and the limiting plate. A high-pressure sealing ring is installed inside the movable hole of the movable plate where it fits onto the main rotating shaft, and the movable plate can move axially along the main rotating shaft. The limiting shaft, the limiting plate, and the main helical spring are located in the outer space of the cylindrical pipe structure.

[0015] Through the above technical solution: the accumulated feces caused by the spiral impeller structure will compress the movable plate, which will force the movable plate blocked at the discharge port of the cylindrical pipe structure to move in the direction of the drive motor. During the movement of the movable plate, due to the elasticity of the main spiral spring, the movable plate can only move when the force of the accumulated feces is greater than the elasticity of the main spiral spring. During the movement, the accumulated feces are in a state of mutual compression, and liquid will not leak through the feces. When the amount of accumulated feces reaches a certain distance, longitudinal force can be applied to the feces located at the tail of the cylindrical pipe structure, thereby causing the accumulated feces to be discharged.

[0016] Compared with the prior art, the present invention provides a wastewater treatment device for modern pig farms, which has the following beneficial effects: 1. It can filter feces in the cleaning liquid, thereby separating the liquid and feces separately for convenient subsequent independent processing. In addition, the device uses screw feeding and elastic damping to directionally compress and clean the accumulated feces. Therefore, the device can perform solid-liquid separation without interruption to ensure the filtration efficiency of the equipment.

[0017] 2. By setting up a conical surface filtration structure, which uses symmetrical conical filter cloth combined with positive / negative conical flow chambers and conical guide plates, the filtration area is increased, allowing sewage to flow smoothly along the conical surface, and guiding feces to concentrate at the conveying end, significantly reducing the risk of clogging. Its rotatable ring body, combined with the limiting rod assembly shaping structure, can rotate synchronously with the spiral linkage structure, reducing fecal adhesion and accumulation. At the same time, in conjunction with the backwash cleaning port on the pipe shell, high-pressure reverse flushing can be achieved to clear blockages, maintaining a highly efficient and stable solid-liquid filtration effect without stopping the machine for disassembly.

[0018] 3. By setting up a spiral linkage structure and an elastic blocking structure, the spiral linkage structure drives the spiral impeller and the conical filter structure to rotate synchronously with the main rotating shaft. This not only promotes the directional pushing of feces through spiral conveying and accelerates the discharge of solid residue, but also reduces the adhesion of the filter surface through rotation. The elastic blocking structure uses the compression of the main spiral spring to form elastic damping on the movable plate, pushing it open only when the solid residue accumulation pressure reaches the standard, realizing solid residue compression and dehydration and preventing liquid leakage. The combination of the two can complete automatic feeding, accumulation compression and controllable slag discharge during continuous operation of the equipment, without the need for machine shutdown and disassembly, significantly improving the solid-liquid separation efficiency and equipment stability. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the full cross-section structure of the present invention; Figure 2 This is a perspective view of the present invention; Figure 3 This is a full cross-sectional schematic diagram of the conical surface filter structure in this invention; Figure 4 This is a perspective view of the spiral linkage structure in this invention; Figure 5 This is a perspective view of the elastic blocking structure in this invention.

[0020] The components include: 1. Drive motor; 2. Fixed base plate; 3. Pipe shell; 4. Liquid filtration chamber; 5. Fixing structure; 6. Main discharge pipe; 7. Backwash port; 8. Cylindrical pipe body structure; 9. Conical surface filtration structure; 91. First annular body; 92. Second annular body; 93. Conical guide plate; 94. Liquid centralized flow pipe; 95. Positive conical flow chamber; 96. Cylindrical liquid flow chamber; 97. Limiting rod assembly; 98. Conical filter cloth; 99. Rod installation. 910. Groove; 10. Reverse conical flow cavity; 11. Helical linkage structure; 101. Main rotating shaft; 102. Coupling; 103. Helical impeller structure; 104. Annular protrusion structure; 105. Conical guide structure; 106. Fixed rod; 11. Elastic blocking structure; 111. Movable plate; 112. Movable hole; 113. Fixed plate; 114. Sleeve hole; 115. Moving hole; 116. Limiting shaft; 117. Limiting plate; 118. Main helical spring. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 are within the scope of protection of the present invention.

[0022] Please see Figure 1-2 A wastewater treatment device for a modern pig farm includes a drive motor 1 with a fixed base plate 2 mounted on the bottom, a pipe shell 3 with a fixing structure 5 at one end, a cylindrical pipe structure 8 located at the arc-shaped discharge port of the pipe shell 3, a liquid filter chamber 4 located on the pipe shell 3 with its discharge end connected to the inlet port of the cylindrical pipe structure 8, and a main discharge pipe 6 located on one side of the circumference of the pipe shell 3 for discharging the filtered liquid. It also includes a conical filter structure installed inside the liquid filter chamber 4 for filtering the liquid entering the inlet port of the liquid filter chamber 4 and being discharged outward through the main discharge pipe 6. Structure 9; a spiral linkage structure 10 installed inside the cylindrical pipe structure 8 and the liquid filter chamber 4, and rotating with the rotor end of the drive motor 1. When the spiral linkage structure 10 rotates, it can drive the conical surface filter structure 9 to rotate, and using the spiral conveying principle, it can directionally convey fine particles located near the spiral impeller structure; an elastic blocking structure 11 installed at the discharge port of the cylindrical pipe structure 8, which can elastically block the accumulated particles formed by the spiral linkage structure 10; and a backwash cleaning port 7 provided on one side of the circumferential surface of the pipe shell 3, which can inject reverse-flowing liquid into the conical surface filter structure 9.

[0023] Please see Figure 3The conical filter structure 9 includes a first annular body 91 and a second annular body 92. A conical guide plate 93 facing the second annular body 92 is provided at the annular hole of the first annular body 91. A liquid concentrating flow channel 94 is provided at one end of the conical guide plate 93. A conical flow cavity 95 with the same shape is provided at the center of the conical guide plate 93. A cylindrical liquid flow cavity 96 is provided at the center of the liquid concentrating flow channel 94. A conical filter cloth 98 symmetrical to the shape of the conical guide plate 93 is embedded between the liquid concentrating flow channel 94 and the second annular body 92. The conical filter cloth 98 is shaped by a set of limiting rods 97 arranged in a multiple annular array when taut. The center of the conical filter cloth 98 forms an anti-conical flow cavity 910 symmetrical to the positive conical flow cavity 95. The inner side of the circumferential surface of the second annular body 92 is provided with a rod mounting groove 99. The annular bodies of the first annular body 91 and the second annular body 92 are rotatably installed in the inner wall structure of the pipe shell 3 through a mechanical sealing structure. The flow areas of the main discharge pipe 6 and the backwash cleaning port 7 are located in the closed area between the first annular body 91 and the second annular body 92. Each set of limiting rods 97 includes two limiting rods. The two limiting rods are distributed on the upper and lower corresponding parts of the conical surface of the conical filter cloth 98, so that the conical filter cloth 98 is clamped in the area between the two limiting rods.

[0024] Please see Figure 4 The spiral linkage structure 10 includes a main rotating shaft 101 inserted into the cylindrical pipe structure 8 and the liquid filtration chamber 4. One end of the main rotating shaft 101 is connected to the rotor end of the drive motor 1 via a coupling 102. A spiral impeller structure 103 is provided on the shaft inside the cylindrical pipe structure 8. An annular protrusion structure 104 is provided at the other end of the main rotating shaft 101. A conical guide structure 105 is provided on the end face of the annular protrusion structure 104 facing the liquid inlet of the pipe shell 3. The circumferential surface of the annular protrusion structure 104 is fixedly connected to each rod mounting groove 99 via corresponding fixing rods 106. When the spiral impeller structure 103 rotates clockwise with the drive motor 1, it can generate a material conveying direction towards the drive motor 1.

[0025] Please see Figure 5The elastic blocking structure 11 includes a fixed plate 113. The fixed plate 113 has a centrally located fitting hole 114 that is fixedly fitted onto the liquid discharge port of the cylindrical pipe structure 8. A movable plate 111, which can move away from or towards the fixed plate 113, is placed on the end face of the fixed plate 113 located near the drive motor 1. The movable plate 111 has a centrally located movable hole 112 that fits onto the shaft of the main rotating shaft 101. Multiple horizontally arranged, annularly arrayed limiting shafts 116 are fixedly installed on the end face of the movable plate 111 facing the cylindrical pipe structure 8. Each limiting shaft... The shaft of shaft 116 corresponds to the moving hole 115 in the plate structure of fixed plate 113, and a limiting plate 117 is installed on the end face. A main helical spring 118 in a compressed state is sleeved on the shaft between fixed plate 113 and limiting plate 117. A high-pressure sealing ring is installed in the movable hole 112 of the movable plate 111 where it is sleeved with the main rotating shaft 101, and the movable plate 111 can move axially along the main rotating shaft 101. The limiting shaft 116, limiting plate 117 and main helical spring 118 are located in the outer space of the cylindrical pipe structure 8.

[0026] In use, the fixed structure 5 is fixedly connected to the discharge outlet of the discharge pool for discharging feces and cleaning liquid, and the main discharge pipe 6 is connected to the inlet for discharging liquid. When separation of feces and liquid is required, the drive motor 1 is started. At this time, after the water and feces enter, they will flow through the positive conical flow chamber 95 and the cylindrical liquid flow chamber 96 into the interior of the reverse conical flow chamber 910. The feces can be screened by the filtration of the side of the conical filter cloth 98. Due to the conical structure and the inclined surface of the conical filter cloth 98, when the liquid backflow formed by the inclined angle enters the interior of the main discharge pipe 6, the main flow direction of the feces is towards the cylindrical pipe structure 8. This design allows most of the feces to directly enter the interior of the cylindrical pipe structure 8, and a small amount of feces will be filtered through the conical filter cloth 98. The filtered liquid is discharged through the main discharge pipe 6. During this process, when the spiral impeller structure 103 rotates with the drive motor 1, the feces around it can be spirally conveyed to form an accumulation state. The system removes the flowing feces. During rotation, the fixed rod 106 drives the conical filter cloth 98 to rotate. The rotating conical filter cloth 98 continuously moves relative to the feces attached to its surface, thereby accelerating the movement of the feces around the conical filter cloth 98. The flowing feces accumulate, and the accumulated feces exert a squeezing effect on the movable plate 111. This squeezing forces the movable plate 111, which is blocked at the discharge port of the cylindrical pipe structure 8, to move towards the drive motor 1. During the movement of the movable plate 111, it can only move when the force of the accumulated feces exceeds the elasticity of the main helical spring 118, due to the elasticity of the main helical spring 118. During the movement, the accumulated feces are in a state of mutual squeezing, and liquid will not leak through the feces. When the amount of accumulated feces reaches a certain distance, longitudinal force can be applied to the feces at the tail of the cylindrical pipe structure 8, thereby discharging the accumulated feces.

[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wastewater treatment device for a modern pig farm, comprising a drive motor (1) with a fixed base plate (2) installed at the bottom, a pipe shell (3) with a fixing structure (5) at one end, a cylindrical pipe structure (8) located at the arc-shaped discharge port of the pipe shell (3), a liquid filter chamber (4) located on the pipe shell (3) and connected at the discharge end to the liquid inlet port of the cylindrical pipe structure (8), and a main discharge pipe (6) located on one side of the circumferential surface of the pipe shell (3) for discharging the filtered liquid, characterized in that: It also includes a conical surface filter structure (9) installed inside the liquid filter chamber (4) that can filter the liquid entering the liquid inlet port of the liquid filter chamber (4) and discharged to the outside through the main discharge pipe (6); The spiral linkage structure (10) installed inside the cylindrical pipe body structure (8) and the liquid filter chamber (4) and rotating with the rotor end of the drive motor (1) can drive the conical surface filter structure (9) to rotate when the spiral linkage structure (10) rotates, and can directionally transport fine particles located near the spiral impeller structure by utilizing the spiral conveying principle. An elastic blocking structure (11) is installed at the discharge port of the columnar pipe structure (8) and can elastically block the accumulated particles formed by the spiral linkage structure (10).

2. The wastewater treatment equipment for a modern pig farm according to claim 1, characterized in that: The outer casing (3) of the pipe is provided with a backwashing port (7) on one side of the circumferential surface, which can inject reverse flow liquid into the conical surface filter structure (9).

3. The wastewater treatment equipment for a modern pig farm according to claim 2, characterized in that: The conical surface filter structure (9) includes a first annular body (91) and a second annular body (92). The annular hole of the first annular body (91) is provided with a conical guide plate (93) facing the second annular body (92). One end of the conical guide plate (93) is provided with a liquid concentrating flow pipe (94). The center of the conical guide plate (93) is provided with a positive conical flow cavity (95) with the same shape. The center of the liquid concentrating flow pipe (94) is provided with a cylindrical liquid flow cavity (96). A conical filter cloth (98) symmetrical to the structure of the conical guide plate (93) is embedded between the liquid concentrating flow pipe (94) and the second annular body (92). The conical filter cloth (98) is shaped by a group of limiting rods (97) arranged in a multiple annular array when it is taut. The center of the conical filter cloth (98) forms an anti-conical flow cavity (910) symmetrical to the positive conical flow cavity (95). The inner side of the circumferential surface of the second annular body (92) is provided with a rod mounting groove (99).

4. The wastewater treatment equipment for a modern pig farm according to claim 3, characterized in that: The first annular body (91) and the second annular body (92) are rotatably installed in the inner wall structure of the pipe shell (3) through a mechanical seal structure, and the flow areas of the main discharge pipe (6) and the backwash cleaning port (7) are located in the closed area between the first annular body (91) and the second annular body (92).

5. The wastewater treatment equipment for a modern pig farm according to claim 4, characterized in that: Each set of limiting rods (97) includes two limiting rods, which are distributed on the upper and lower corresponding parts of the conical surface of the conical filter cloth (98), so that the conical filter cloth (98) is clamped in the area between the two limiting rods.

6. The wastewater treatment equipment for a modern pig farm according to claim 5, characterized in that: The spiral linkage structure (10) includes a main rotating shaft (101) inserted into the cylindrical pipe body structure (8) and the liquid filtration chamber (4). One end of the main rotating shaft (101) is connected to the rotor end of the drive motor (1) through a coupling (102). The main rotating shaft (101) has a spiral impeller structure (103) on the shaft inside the cylindrical pipe body structure (8). The other end of the main rotating shaft (101) has an annular protrusion structure (104). The annular protrusion structure (104) has a conical guide structure (105) on the end face facing the liquid inlet of the pipe shell (3). The circumferential surface of the annular protrusion structure (104) is fixedly connected to each rod mounting groove (99) through a corresponding fixing rod (106).

7. The wastewater treatment equipment for a modern pig farm according to claim 6, characterized in that: When the spiral impeller structure (103) rotates clockwise with the drive motor (1), it can generate a material conveying direction toward the drive motor (1).

8. The wastewater treatment equipment for a modern pig farm according to claim 7, characterized in that: The elastic blocking structure (11) includes a fixed plate (113), the center of which is provided with a fitting hole (114) that is fixedly fitted onto the liquid discharge port of the cylindrical pipe structure (8), and a movable plate (111) that can move away from or close to the fixed plate (113) is placed on the end face of the fixed plate (113) located on the drive motor (1), the center of which is provided with a movable hole (112) that is fitted onto the shaft of the main rotating shaft (101). The movable plate (111) has a plurality of horizontal and circular array of limiting shafts (116) fixedly installed on one end face facing the cylindrical pipe structure (8). Each limiting shaft (116) has a shaft body that corresponds to the moving hole (115) in the plate structure of the fixed plate (113) and a limiting plate (117) installed on its end face. A main helical spring (118) in a compressed state is sleeved on the shaft body of the limiting shaft (116) between the fixed plate (113) and the limiting plate (117).

9. The wastewater treatment equipment for a modern pig farm according to claim 8, characterized in that: The movable plate (111) has a high-pressure sealing ring installed inside the movable hole (112) of the part where it is fitted with the main rotating shaft (101), and the movable plate (111) can move axially along the main rotating shaft (101).

10. A wastewater treatment device for a modern pig farm according to claim 9, characterized in that: The limiting shaft (116), the limiting plate (117), and the main helical spring (118) are located in the outer space of the cylindrical pipe structure (8).

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