Simple fish and vegetable symbiotic equipment

Abstract

The invention relates to the technical field of ecological breeding, in particular to simplified fish and vegetable symbiotic equipment which comprises a water quality purification unit and a water inlet pipe, the water quality purification unit comprises a reservoir, a bearing structure and at least two nitrification assemblies, the bearing structure comprises a bearing frame, and partition blocks are arranged on the inner side of the bearing frame; the inner space of the bearing frame is divided into an upper part, a middle part and a lower part by the partition blocks, a plurality of water inlet grooves are formed in the side wall of the bearing frame, the two nitrification assemblies are installed on the upper part and the lower part of the bearing frame respectively, and rotating connecting structures are arranged at the two ends of the bearing frame and used for assisting the bearing frame in rotating around the axis of the bearing frame. Buoyancy adjusting structures for providing buoyancy are arranged on the two sides of the bearing frame and used for controlling the depth of the bearing frame sinking below the water surface. The water quality purification unit is arranged, so that the problem of overgrowth of a biological membrane caused by long-term immersion on the surface of ceramsite is effectively avoided, and the stability and continuity of a nitrobacteria attachment space are ensured.

Description

Technical Field

[0001] The invention relates to the technical field of ecological breeding, and in particular to a simplified fish-vegetable symbiosis device. Background Art

[0002] As a new ecological cycle agricultural model, fish-vegetable symbiosis integrates aquaculture and hydroponic cultivation technology, realizes the mutually beneficial symbiosis between fish, plants and microorganisms, improves resource utilization and reduces environmental pollution, and has attracted much attention in the field of sustainable agricultural development. Among the many fish-vegetable symbiosis equipment, nitrifying bacteria plays a key role in the purification of aquaculture wastewater. It can convert harmful ammonia nitrogen in the water into nitrates, provide nutrients for plants, and maintain the ecological balance of the system.

[0003] The patent with announcement number CN114903001B discloses a small fish-vegetable symbiotic system, which uses a floating plate to make the bottom of the culture screen partially located in the water and partially located on the water surface. Relying on the good adsorption capacity of expanded clay, the expanded clay on the water surface absorbs moisture and provides sufficient oxygen, which is conducive to the reproduction of nitrifying bacteria, and then converts pollutants in the reservoir into nutrients that can be absorbed by plants.

[0004] Although the above scheme allows the expanded clay to continuously absorb water, providing better conditions for the reproduction of nitrifying bacteria, the distribution of the expanded clay in the culture sieve causes some of the expanded clay to be below the water surface for a long time, continuously contacting with ammonia nitrogen in the water for nitrification reaction, while some of the expanded clay is in an alternating state of wet and dry. Although this is conducive to the reproduction and activity maintenance of nitrifying bacteria, the surface of the expanded clay that is in a wet state for a long time is prone to excessive growth of biofilm, which greatly reduces the attachment space for nitrifying bacteria and reduces the purification efficiency. Summary of the invention

[0005] In view of the above problems, a simplified fish-vegetable symbiosis device is provided. By setting a bearing structure, at least two nitrification components, a rotating connection structure and a buoyancy adjustment structure, the problem of excessive biofilm growth on the surface of expanded clay caused by long-term immersion is effectively avoided, thereby ensuring the stability and sustainability of the attachment space for nitrifying bacteria.

[0006] In order to solve the problems of the prior art, the present invention provides a simplified fish-vegetable symbiosis device, including a water purification unit and a water inlet pipe arranged on one side thereof, the water purification unit including a water reservoir, a bearing structure and at least two nitrification components, a water outlet is provided on the side wall of the water reservoir, the bearing structure is floated in the water reservoir, the bearing structure includes a bearing frame, a plurality of partition blocks are provided on the inner side of the bearing frame, the partition blocks divide the internal space of the bearing frame into three parts of upper, middle and lower parts, a plurality of water inlet grooves are provided on the side wall of the bearing frame, the water inlet grooves are connected with the middle part of the bearing frame, two nitrification components are respectively installed on the upper and lower parts of the bearing frame, both ends of the bearing frame are provided with a rotating connection structure, the rotating connection structure is used to assist the bearing frame to rotate around its own central axis, both sides of the bearing frame are provided with a buoyancy adjustment structure for providing buoyancy, the buoyancy adjustment structure is used to control the depth of the bearing frame sinking below the water surface.

[0007] Preferably, the rotating connection structure includes a horizontally arranged connecting beam, a rotating shaft rotatably connected to the connecting beam is arranged in the middle of the connecting beam, a sliding connection component connected to the supporting frame is arranged at one end of the rotating shaft, and a stable connection component for fixing the rotating shaft is also arranged on the connecting beam.

[0008] Preferably, the sliding connection assembly includes a slider and multiple first guide rods parallel to the plane where the supporting frame is located, and the first guide rods are perpendicular to the rotating shaft, and both ends of each first guide rod are sleeved with second elastic reset parts, the slider is slidably connected to the multiple first guide rods, and both ends of the slider are abutted against the second elastic reset parts.

[0009] Preferably, the stable connection assembly includes a bracket, a mounting plate and an adjustment assembly; the mounting plate is arranged inside the bracket, and plug rods are arranged at both ends of the mounting plate, and docking holes corresponding to the plug rods are opened on the rotating shaft; the adjustment assembly is arranged in the middle of the bracket, and the adjustment assembly is used to control the docking of the plug rod with the docking hole.

[0010] Preferably, the rotational connection structure further includes a position-limiting guide assembly, which limits the lifting direction of the bearing frame when the buoyancy adjustment structure is working.

[0011] Preferably, the buoyancy adjustment structure includes a buoyancy box and at least two gravity adjustment assemblies; the buoyancy box includes a lower box body and an upper box body that can be detachably connected, and the two ends of the lower box body are respectively connected to two connecting beams; the two gravity adjustment assemblies are respectively arranged at the two ends of the lower box body, and the gravity adjustment assemblies are used to adjust the gravity of the buoyancy box as a whole.

[0012] Preferably, the gravity adjustment assembly includes a water pumping cylinder and a connecting rod coaxially arranged with the water pumping cylinder; a first opening and a second opening are respectively arranged at both ends of the water pumping cylinder, a piston block is arranged inside the water pumping cylinder, and the piston block divides the inner cavity of the water pumping cylinder into two parts; the connecting rod is used to drive the piston block to move inside the water pumping cylinder.

[0013] Preferably, the buoyancy adjustment structure further comprises a synchronous adjustment structure, which is connected to the two gravity adjustment components, and is used to drive the two gravity adjustment components to synchronously adjust the buoyancy of the buoyancy box.

[0014] Preferably, the buoyancy regulating structure further comprises a filtering assembly, which is connected to the two gravity adjusting assemblies, and the filtering assembly is used to filter the water entering the water pumping cylinder.

[0015] Preferably, fixing structures are provided on the four corners of the supporting frame, and the fixing structures fix the nitrification assembly on the supporting frame.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention is provided with a water reservoir, a bearing structure, at least two nitrification components, a rotating connection structure and a buoyancy adjustment structure. After the aquaculture wastewater containing fish excrement enters the water reservoir, the bearing structure floats on the water surface under the action of the buoyancy adjustment structure, and the nitrification component at the lower part of the bearing frame is immersed in water. The wastewater flows through the nitrification component through the water inlet trough. The ceramsite in the nitrification component provides an attachment environment for nitrifying bacteria, converts ammonia nitrogen into nitrate, and realizes efficient water purification. The rotating connection structure can drive the bearing frame to rotate, so that the positions of the two nitrification components are interchanged, and the nitrification component originally underwater enters the humid air environment for nitrifying bacteria to grow. The nitrification components newly sunk into the water carry out wastewater purification work. The buoyancy adjustment structure can control the depth of the supporting frame sinking below the water surface. After the positions of the nitrification components are interchanged, the buoyancy adjustment structure fine-tunes the immersion depth of the supporting frame to make the nitrification components located on the upper part of the supporting frame partially immersed in water, thereby maintaining suitable humidity conditions on the surface of the expanded clay. Through the alternating operation mechanism of the two nitrification components, the dynamic balance of nitrifying bacteria in the process of consumption and proliferation is achieved, thereby effectively avoiding the problem of excessive growth of biofilm on the surface of the expanded clay caused by long-term immersion, and ensuring the stability and sustainability of the attachment space for nitrifying bacteria.

[0018] 2. The present invention is provided with a connecting beam, a rotating shaft, a sliding connecting component and a stable connecting component. When the nitrification component performs water purification, the stable connecting component can ensure that the supporting frame always maintains a horizontal posture during the process of water flow disturbance, so that the nitrification component located at the lower part of the supporting frame can be stably below the water surface and fully in contact with the wastewater, thereby ensuring the stability and efficiency of the water purification process and ensuring that nitrifying bacteria can continuously and effectively convert ammonia nitrogen in the wastewater into nitrate. When the nitrification component needs to be interchanged, the constraint of the rotating shaft by the stable connecting component is first released so that the rotating shaft can rotate freely, and the supporting frame is driven to rotate 180 degrees manually or automatically, thereby realizing the spatial position interchange of the upper and lower groups of nitrification components. Afterwards, the stable connecting component constrains the rotating shaft again, so that the rotating shaft is fixedly connected to the connecting beam, thereby preventing the supporting frame from accidentally rotating during subsequent operation, thereby realizing the rotation and fixation of the supporting frame.

[0019] 3. The present invention is provided with a slider, a first guide rod and a second elastic reset member. When the bearing frame completes rotation and the expanded clay presents a density gradient distribution, an external force along the axis direction of the first guide rod is applied to the bearing frame, and the bearing frame drives the slider to reciprocate along the first guide rod. The generated inertial force and vibration rearrange the expanded clay and make it tend to be evenly distributed, thereby effectively eliminating the difference in wastewater flow resistance caused by the accumulation of expanded clay, ensuring that the wastewater can fully contact the nitrifying bacteria on the surface of the expanded clay, and significantly improving the water purification efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a stereoscopic diagram of a water purification unit and a water inlet pipe in a simplified fish-vegetable symbiosis device of the present invention.

[0021] Figure 2 It is a three-dimensional diagram of a supporting structure, a nitrification component, a rotating connection structure and a buoyancy adjustment structure in a simplified fish-vegetable symbiosis device of the present invention.

[0022] Figure 3 It is a top view of a supporting structure, a nitrification component, a rotating connection structure and a buoyancy adjustment structure in a simplified fish-vegetable symbiosis device of the present invention.

[0023] Figure 4 yes Figure 3 Stereoscopic cross-sectional view at AA in the middle.

[0024] Figure 5 It is a three-dimensional diagram of a supporting frame and a rotating connection structure in a simplified fish-vegetable symbiosis device of the present invention.

[0025] Figure 6 It is a stereoscopic diagram of a rotating shaft and a sliding connection component in a simplified fish-vegetable symbiosis device of the present invention.

[0026] Figure 7 It is a stereoscopic diagram of a connecting beam, a rotating shaft and a stable connecting component in a simplified fish-vegetable symbiosis device of the present invention.

[0027] Figure 8 It is a stereoscopic diagram of a connecting beam, a rotating shaft, a sliding connection component, a stable connection component and a limiting guide component in a simplified fish-vegetable symbiosis device of the present invention.

[0028] Fig. 9 It is a stereoscopic diagram of a floating tank, a gravity adjustment component, a synchronous adjustment structure and a filtering component in a simplified fish-vegetable symbiosis device of the present invention.

[0029] Fig.10 It is a three-dimensional cross-sectional view of a floating tank, a gravity adjustment component, a synchronous adjustment structure and a filtering component in a simplified fish-vegetable symbiosis device of the present invention.

[0030] Fig.11 It is a three-dimensional diagram of a supporting frame, a fixing structure and a nitrification component in a simplified fish-vegetable symbiosis device of the present invention.

[0031] Fig.12 yes Fig.11 A magnified partial view of point B in the middle.

[0032] The numbers in the figure are: 1, water reservoir; 11, water outlet; 2, bearing structure; 21, bearing frame; 211, water inlet trough; 22, partition block; 23, fixed structure; 231, fixed column; 232, pressure plate; 233, first elastic reset member; 3, nitrification component; 31, culture screen; 32, ceramsite; 4, rotating connection structure; 41, connecting beam; 42, rotating shaft; 421, docking hole; 43, sliding connection component; 431, slider; 432, first guide rod; 433, second elastic reset member; 44, stable connection component; 441, bracket; 442, mounting plate; 4421. Insert rod; 443. Adjustment assembly; 4431. Adjustment screw; 4432. Second guide rod; 4433. Third elastic reset member; 45. Limit guide assembly; 451. Crossbeam; 452. Third guide rod; 5. Buoyancy adjustment structure; 51. Float box; 511. Lower box body; 512. Upper box body; 52. Gravity adjustment assembly; 521. Pump cylinder; 522. Piston block; 523. Connecting rod; 53. Synchronous adjustment structure; 531. Double-headed screw; 532. Connecting arm; 54. Filter assembly; 541. Filter head; 542. Water guide pipe; 6. Water inlet pipe. DETAILED DESCRIPTION

[0033] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0034] Reference Figures 1 to 12 As shown: a simplified fish-vegetable symbiosis device, including a water purification unit and a water inlet pipe 6 arranged on one side thereof, the water purification unit includes a water reservoir 1, a bearing structure 2 and at least two nitrification components 3, a water outlet 11 is provided on the side wall of the water reservoir 1, the bearing structure 2 is floatingly arranged in the water reservoir 1, the bearing structure 2 includes a bearing frame 21, a plurality of partition blocks 22 are provided on the inner side of the bearing frame 21, the partition blocks 22 divide the internal space of the bearing frame 21 into three parts, namely, upper, middle and lower parts, a plurality of water inlet grooves 211 are provided on the side wall of the bearing frame 21, the water inlet grooves 211 are connected to the middle part of the bearing frame 21, two nitrification components 3 are respectively installed on the upper and lower parts of the bearing frame 21, both ends of the bearing frame 21 are provided with a rotating connection structure 4, the rotating connection structure 4 is used to assist the bearing frame 21 to rotate around its own central axis, both sides of the bearing frame 21 are provided with a buoyancy adjustment structure 5 for providing buoyancy, the buoyancy adjustment structure 5 is used to control the depth of the bearing frame 21 sinking below the water surface.

[0035] The nitrification component 3 uses a culture sieve 31 as a carrier, and is filled with a porous ceramsite 32 medium to provide a stable attachment and growth environment for nitrifying bacteria.

[0036] During operation, aquaculture wastewater containing fish excrement flows into the reservoir 1 through the water inlet pipe 6. As the water level rises, the bearing structure 2 floats on the water surface under the action of the buoyancy adjustment structure 5, and the nitrification component 3 at the bottom of the bearing frame 21 is immersed in the water body. The wastewater forms a laminar flow through the water inlet trough 211 and flows through the lower nitrification component 3. The nitrifying bacteria attached to the surface of the ceramsite 32 convert the ammonia nitrogen in the wastewater into nitrate through biological nitrification. After the nitrification component 3 has been running for a period of time, the bearing frame 21 is driven to rotate 180 degrees by rotating the connecting structure 4, so that the positions of the two nitrification components 3 are interchanged, so that the nitrification component 3 originally under water is exposed to the humid air. In the air environment, the nitrifying bacteria enter the proliferation stage, and the nitrifying component 3 newly sunk into the water is put into wastewater purification work. Subsequently, the buoyancy adjustment structure 5 fine-tunes the immersion depth of the supporting frame 21, so that the nitrifying component 3 located on the upper part of the supporting frame 21 is partially immersed in water, maintaining the humidity conditions on the surface of the expanded clay 32, and providing a suitable microenvironment for the reproduction of nitrifying bacteria. Through the alternating operation mechanism of the two nitrifying components 3, the dynamic balance of nitrifying bacteria in the process of consumption and proliferation is achieved, thereby effectively avoiding the problem of excessive growth of biofilm on the surface of the expanded clay 32 due to long-term immersion, and ensuring the stability and sustainability of the attachment space for nitrifying bacteria.

[0037] Reference Figure 4 and Figure 5 As shown: the rotating connection structure 4 includes a horizontally arranged connecting beam 41, a rotating shaft 42 rotatably connected to the connecting beam 41 is arranged in the middle part, a sliding connection component 43 connected to the supporting frame 21 is arranged at one end of the rotating shaft 42, and a stabilizing connection component 44 for fixing the rotating shaft 42 is also arranged on the connecting beam 41.

[0038] The supporting frame 21 is in a horizontal state during the use of the nitrification component 3. The nitrification component 3 located at the bottom of the supporting frame 21 is affected by gravity and the buoyancy adjustment structure 5, so that this part of the nitrification component 3 is below the water surface and can fully contact with the wastewater. During the water purification process, the stable connection component 44 ensures that the supporting frame 21 maintains a horizontal posture during water flow disturbance and buoyancy adjustment. After a period of use, the constraint of the stable connection component 44 on the rotating shaft 42 is first released, so that the rotating shaft 42 can rotate freely around its own axis, and the supporting frame 21 is driven to rotate 180 degrees by a manual or electric drive device to complete the spatial position exchange of the upper and lower groups of nitrification components 3. Then the stable connection component 44 constrains the rotating shaft 42 again, so that the rotating shaft 42 is fixedly connected to the connecting beam 41 to prevent the rotating shaft 42 from rotating freely. The two sliding connection components 43 at both ends of the supporting frame 21 can move the supporting frame 21 in the horizontal direction, providing a basis for the uniform distribution of the ceramsite 32 in the culture screen 31. The rotation and fixation of the supporting frame 21 are achieved through the cooperation of the rotating shaft 42 and the stable connection structure.

[0039] Reference Figure 5 and Figure 6 As shown: the sliding connection assembly 43 includes a slider 431 and multiple first guide rods 432 parallel to the plane where the supporting frame 21 is located, and the first guide rods 432 are perpendicular to the rotating shaft 42, and both ends of each first guide rod 432 are sleeved with a second elastic return member 433, the slider 431 is slidably connected to the multiple first guide rods 432, and both ends of the slider 431 are abutted against the second elastic return member 433.

[0040] In the culture screen 31, reasonable gaps need to be maintained between the ceramsites 32 to ensure that the wastewater is in full contact with the nitrifying bacteria biofilm on the surface of the ceramsite 32 to achieve efficient water purification. However, when the supporting frame 21 is rotated 180 degrees, due to the action of gravity, the ceramsite 32 is displaced in the culture screen 31, causing the ceramsite 32 to present a density gradient distribution in a horizontal state. This uneven distribution phenomenon will cause the flow rate and contact area of ​​the wastewater flowing through different areas to be different, thereby causing an imbalance in the efficiency of the nitrifying bacteria on the surface of each ceramsite 32 participating in the purification reaction, affecting the overall purification effect. Therefore, after the supporting frame 21 completes the rotation, a periodic horizontal force is applied to the supporting frame 21 along the axis direction of the first guide rod 432 through an external force, and the supporting frame 21 is driven by the force to drive the slider 43 The first guide rod 432 performs reciprocating linear motion, and the inertial force and vibration generated during the motion are transmitted to the inside of the culture screen 31. Under the action of inertia and vibration, the ceramsite 32 is relatively displaced and rearranged in the culture screen 31. With the continuous reciprocating motion of the bearing frame 21, the ceramsite 32 gradually tends to be evenly distributed. When the external force stops, the second elastic reset member 433 dynamically adjusts the slider 431 by virtue of its elastic restoring force and damping characteristics, so that the slider 431 reaches a force balance position in the middle of the first guide rod 432. The ceramsite 32 is evenly distributed through the reciprocating motion of the bearing frame 21, thereby effectively eliminating the difference in wastewater flow resistance caused by the accumulation of ceramsite 32, ensuring the full contact between nitrifying bacteria and wastewater, and significantly improving the water purification efficiency.

[0041] Reference Figure 5 and Figure 7 As shown: the stable connection component 44 includes a bracket 441, a mounting plate 442 and an adjustment component 443; the mounting plate 442 is arranged inside the bracket 441, and plug rods 4421 are arranged at both ends of the mounting plate 442, and a docking hole 421 corresponding to the plug rod 4421 is opened on the rotating shaft 42; the adjustment component 443 is arranged in the middle of the bracket 441, and the adjustment component 443 is used to control the docking of the plug rod 4421 with the docking hole 421.

[0042] Specifically, the adjustment component 443 includes an adjusting screw rod 4431 and a second guide rod 4432. The adjusting screw rod 4431 is threadedly connected to the bracket 441, and the second guide rod 4432 is movably connected to the bracket 441. One end of the second guide rod 4432 is fixedly connected to the mounting plate 442, and the other end of the second guide rod 4432 is sleeved with a third elastic reset member 4433. The two ends of the third elastic reset member 4433 are respectively abutted against the end of the second guide rod 4432 and the bracket 441.

[0043] The fluid dynamics generated by the flow of wastewater will form a lateral force on the supporting frame 21. Since the supporting frame 21 is rotatably connected through the rotating shaft 42, if the rotating shaft 42 lacks effective constraints, the supporting frame 21 is prone to unexpected shaking around the axis of the rotating shaft 42. This shaking will cause the expanded clay 32 in the culture screen 31 to shift, resulting in an imbalance in the mass distribution on both sides of the supporting frame 21, which will further cause the supporting frame 21 to tilt, resulting in uneven distribution of the expanded clay 32 in the culture screen 31. Therefore, it is necessary to constrain the rotating shaft 42. When the equipment is in the water purification working state, the third elastic reset member 4433 is in a compressed state, pushing the mounting plate 442 to make the insertion rod 4421 embedded in the docking hole 421 of the rotating shaft 42, forming a rigid constraint, effectively limiting the rotational freedom of the rotating shaft 42, and ensuring that the supporting frame 21 is in a It maintains a stable posture under the disturbance of wastewater flow. When the supporting frame 21 needs to be rotated, the adjusting screw 4431 is driven to rotate, and the adjusting screw 4431 is axially away from the rotating shaft 42 by utilizing the principle of threaded transmission. The mounting plate 442 is synchronously moved backward under the elastic restoring force of the third elastic reset member 4433, driving the insertion rod 4421 to disengage from the docking hole 421, and releasing the constraint on the rotating shaft 42. After the rotating shaft 42 completes a 180-degree rotation, the adjusting screw 4431 is rotated in the opposite direction. The adjusting screw 4431 pushes the mounting plate 442 forward through axial displacement, so that the insertion rod 4421 is reinserted into the docking hole 421, and the rigid fixation of the rotating shaft 42 is established again, thereby effectively suppressing the shaking of the supporting frame 21 and maintaining the uniform distribution of the expanded clay 32 in the culture screen 31.

[0044] Reference Figure 5 and Figure 7 As shown, the rotating connection structure 4 also includes a limit guide component 45, which limits the lifting direction of the bearing frame 21 when the buoyancy adjustment structure 5 is working.

[0045] Specifically, the limiting guide assembly 45 includes a cross beam 451 and at least two third guide rods 452. Both ends of the cross beam 451 are fixed on the water reservoir 1. The two third guide rods 452 are vertically arranged, and one end of the third guide rod 452 is fixedly connected to the cross beam 451. The connecting beam 41 is movably connected to the third guide rod 452.

[0046] The bearing structure 2 floats on the surface of the water body. If there is a lack of effective guiding and limiting mechanism, the fluid dynamics generated by the flow of water will cause the bearing structure 2 to produce irregular lateral displacement in the reservoir 1. This uncontrolled displacement can easily cause the bearing structure 2 to collide with the inner wall of the reservoir 1. Therefore, it is necessary to restrict the movement of the bearing structure 2, and the connecting beam 41 is slidably connected with the two third guide rods 452. Wastewater containing fish excrement flows into the reservoir 1 through the water inlet pipe 6. As the water level continues to rise, the buoyancy adjustment structure 5 contacts the water body to provide buoyancy support for the bearing structure 2. The bearing structure 2 rises in the vertical direction under the action of buoyancy, driving the connecting beam 41 to move synchronously. Since the connecting beam 41 and the third guide rod 452 form a sliding constraint, the connecting beam 41 can only be vertically lifted and lowered along the axial direction of the third guide rod 452, effectively limiting the freedom of the bearing structure 2 in the horizontal direction. This constraint mechanism ensures that the bearing structure 2 always maintains a stable vertical motion trajectory during the lifting process, thereby avoiding collision with the inner wall of the reservoir 1 due to lateral displacement.

[0047] Reference Fig. 9 and Fig.10 As shown: the buoyancy adjustment structure 5 includes a buoyancy box 51 and at least two gravity adjustment components 52; the buoyancy box 51 includes a lower box body 511 and an upper box body 512 that can be detachably connected, and the two ends of the lower box body 511 are respectively connected to two connecting beams 41; the two gravity adjustment components 52 are respectively arranged at the two ends inside the lower box body 511, and the gravity adjustment components 52 are used to adjust the gravity of the buoyancy box 51 as a whole.

[0048] When the immersion depth of the supporting frame 21 is too shallow, part of the nitrification component 3 located on the upper part of the supporting frame 21 cannot form effective contact with the wastewater, resulting in insufficient humidity on the surface of the expanded clay 32, making it difficult to meet the moist environment required for the reproduction of nitrifying bacteria, thereby inhibiting the metabolic activity and proliferation rate of nitrifying bacteria. On the contrary, if the immersion depth of the supporting frame 21 is too deep, most of the nitrification component 3 on the upper part of the supporting frame 21 will be submerged in the water body, and a continuous water film will form on the surface of the expanded clay 32, hindering the penetration and exchange of oxygen, causing nitrifying bacteria to be hypoxic, causing abnormal biofilm growth and decreased purification efficiency. Therefore, it is necessary to adjust the depth of the supporting frame 21 below the water surface. When it is necessary to increase the immersion depth of the supporting frame 21 in the water body, the gravity adjustment component 52 increases the mass of the buoyancy box 51. According to the Archimedes principle, in order to maintain force balance, the buoyancy box 51 needs to increase the volume of the water body displaced, so as to immerse the buoyancy box 51. As the water body increases, the buoyancy box 51 transmits the displacement to the supporting frame 21 through the connecting beam 41, driving the supporting frame 21 to sink synchronously. When the supporting frame 21 reaches the preset depth, the gravity adjustment component 52 locks the current mass state to keep the gravity of the buoyancy box 51 constant, ensuring that the supporting frame 21 is stably at the target depth. When it is necessary to reduce the immersion depth of the supporting frame 21, the gravity adjustment component 52 operates in the opposite direction to reduce the overall gravity of the buoyancy box 51. At this time, the buoyancy of the buoyancy box 51 is greater than the gravity. According to the principle of force balance, the buoyancy box 51 will float upward and drive the supporting frame 21 to rise synchronously through the connecting beam 41 until the supporting frame 21 reaches the ideal depth. Then, the gravity parameters are locked again to maintain stable operation. By controlling the immersion depth of the supporting frame 21, the efficient operation of the nitrification component 3 is guaranteed, and the optimal attachment and reproduction state of nitrifying bacteria on the surface of the ceramsite 32 is maintained.

[0049] Reference Fig. 9 and Fig.10 As shown: the gravity adjustment component 52 includes a water pumping cylinder 521 and a connecting rod 523 coaxially arranged with the water pumping cylinder 521; a first opening and a second opening are respectively arranged at both ends of the water pumping cylinder 521, a piston block 522 is arranged inside the water pumping cylinder 521, and the piston block 522 divides the inner cavity of the water pumping cylinder 521 into two parts; the connecting rod 523 is used to drive the piston block 522 to move inside the water pumping cylinder 521.

[0050] Specifically, the first opening extends below the water surface, the second opening is connected to the external atmosphere, and the piston block 522 moves between the first opening and the second opening. When the piston block 522 is close to the first opening, the weight of the buoyancy box 51 is the smallest, and when the piston block 522 is close to the second opening, the weight of the buoyancy box 51 is the largest.

[0051] When it is necessary to adjust the supporting frame 21 to go below the water surface, the connecting rod 523 applies a force toward the outside of the pumping cylinder 521 to the piston block 522, so that the piston block 522 moves from the first opening to the second opening. As the piston block 522 moves, the first opening generates suction on the wastewater, and the wastewater is sucked into the pumping cylinder 521, so that the total mass of the buoyancy box 51 increases. When it is necessary to adjust the supporting frame 21 to float to the surface, the connecting rod 523 applies a force toward the inside of the pumping cylinder 521 to the piston block 522, and the piston block 522 generates an extrusion pressure on the wastewater in the pumping cylinder 521, and squeezes the wastewater out of the pumping cylinder 521, so that the total mass of the buoyancy box 51 decreases. By controlling the position of the piston block 522 in the pumping cylinder 521, the mass of the water in the pumping cylinder 521 can be adjusted, so as to accurately adjust the depth of the supporting frame 21 below the water surface.

[0052] Reference Fig. 9 and Fig.10 As shown, the buoyancy adjustment structure 5 also includes a synchronous adjustment structure 53, which is connected to the two gravity adjustment components 52. The synchronous adjustment structure 53 is used to drive the two gravity adjustment components 52 to synchronously adjust the buoyancy of the floating box 51.

[0053] Specifically, the synchronous adjustment structure 53 includes a double-headed screw rod 531, the axis of which is parallel to the axis of the pull rod, and two connecting arms 532 are threadedly connected to the two threaded parts of the double-headed screw rod 531, one end of which is connected to the connecting rod 523. When the total mass of the buoyancy tank 51 needs to be increased, the double-headed screw rod 531 rotates, and the two connecting arms 532 pull the two piston blocks 522 closer to each other through the two connecting rods 523, so that the two pumping cylinders 521 simultaneously draw in an equal amount of waste water. When the total mass of the buoyancy tank 51 needs to be reduced, the double-headed screw rod 531 rotates in the opposite direction, and the two connecting arms 532 push the two piston blocks 522 away from each other through the two connecting rods 523, so that the two pumping cylinders 521 simultaneously discharge an equal amount of waste water. The synchronous adjustment structure 53 controls the two ends of the buoyancy tank 51 to increase or discharge an equal amount of waste water at the same time, thereby achieving the same buoyancy at both ends of the buoyancy tank 51 and avoiding the buoyancy tank 51 from tilting during the buoyancy adjustment process.

[0054] Reference Fig. 9 and Fig.10 As shown, the buoyancy regulating structure 5 further includes a filtering assembly 54 , which is connected to the two gravity adjusting assemblies 52 , and is used to filter the water entering the water pumping cylinder 521 .

[0055] Specifically, the filter assembly 54 includes a filter head 541 and two water pipes 542 . The two water pipes 542 are respectively communicated with the first openings of the two water pumping cylinders 521 , and the filter head 541 is connected to the two water pipes 542 .

[0056] During the process of pumping wastewater into the pumping cylinder 521, if the wastewater is not filtered, the debris in the wastewater may enter the pumping cylinder 521, and during the process of discharging the wastewater, some impurities will remain in the pumping cylinder 521. As the number of pumping and drainage increases, more and more impurities are left in the pumping cylinder 521, which hinders the movement of the piston block 522. Therefore, a filter assembly 54 is provided. During pumping, the filter head 541 filters the wastewater and intercepts the debris outside the filter head 541. The wastewater flows along the two water pipes 542 to the two pumping cylinders 521 respectively, thereby avoiding impurities in the wastewater remaining in the pumping cylinder 521.

[0057] Reference Fig.11 and Fig.12 As shown: fixing structures 23 are provided on the four corners of the carrying frame 21 , and the fixing structures 23 fix the nitrification assembly 3 on the carrying frame 21 .

[0058] Specifically, the fixed structure 23 includes a fixed column 231, the middle part of the fixed column 231 is connected to the supporting frame 21, both ends of the fixed column 231 are movably provided with a pressure plate 232, and both ends of the fixed column 231 are sleeved with a first elastic reset member 233, and the two ends of the first elastic reset member 233 are respectively abutted against the end of the fixed column 231 and the pressure plate 232.

[0059] After the nitrification component 3 has been used for a period of time, impurities in the wastewater will adhere to its surface, so it needs to be removed and cleaned regularly. For this purpose, a fixing structure 23 is set at the four corners of the carrying frame 21. After the nitrification component 3 is placed on the carrying frame 21, a force is first applied to the pressing plate 232 toward the end of the fixing column 231, so that the first elastic reset member 233 corresponding to the pressing plate 232 is compressed, and then the pressing plate 232 is pushed to rotate around the axis of the fixing column 231. When the pressing plate 232 rotates to the upper end of the nitrification component 3, the pressure applied toward the fixing column 231 is removed. Due to the force applied on the end of the fixed column 231, the first elastic reset member 233 applies a force on the pressure plate 232 toward the supporting frame 21, so that the pressure plate 232 is pressed on the nitrification component 3, so that the nitrification component 3 is fixed on the supporting frame 21. When the nitrification component 3 is disassembled, a force is applied to the pressure plate 232 toward the end of the fixed column 231 to separate the pressure plate 232 from the nitrification component 3, and then the pressure plate 232 is rotated, and finally the nitrification component 3 is removed from the supporting plate, thereby realizing the installation and disassembly of the nitrification component 3, and facilitating the cleaning of the nitrification component 3.

[0060] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A simplified fish-vegetable symbiosis device, comprising a water purification unit and a water inlet pipe arranged on one side thereof, characterized in that: The water purification unit includes a water reservoir, a bearing structure and at least two nitrification components. A water outlet is provided on the side wall of the water reservoir. The bearing structure is floated in the water reservoir. The bearing structure includes a bearing frame. A plurality of partition blocks are provided on the inner side of the bearing frame. The partition blocks divide the internal space of the bearing frame into three parts, namely, upper, middle and lower parts. A plurality of water inlet grooves are provided on the side wall of the bearing frame. The water inlet grooves are connected to the middle part of the bearing frame. Two nitrification components are respectively installed in the upper and lower parts of the bearing frame. Rotating connection structures are provided at both ends of the bearing frame. The rotating connection structures are used to assist the bearing frame to rotate around its own central axis. Buoyancy adjustment structures for providing buoyancy are provided on both sides of the bearing frame. The buoyancy adjustment structures are used to control the depth of the bearing frame below the water surface.

2. The simplified fish-vegetable symbiosis device according to claim 1, characterized in that: The rotating connection structure includes a horizontally arranged connecting beam, a rotating shaft rotatably connected to the connecting beam is arranged in the middle of the connecting beam, a sliding connection component connected to the bearing frame is arranged at one end of the rotating shaft, and a stable connection component for fixing the rotating shaft is also arranged on the connecting beam.

3. The simplified fish-vegetable symbiosis device according to claim 2, characterized in that: The sliding connection assembly includes a slider and multiple first guide rods parallel to the plane where the carrying frame is located, and the first guide rods are perpendicular to the rotating shaft. Both ends of each first guide rod are sleeved with second elastic reset parts. The slider is slidably connected to the multiple first guide rods, and both ends of the slider are abutted against the second elastic reset parts.

4. The simplified fish-vegetable symbiosis device according to claim 2, characterized in that: The stable connection assembly includes a bracket, a mounting plate and an adjustment assembly; The mounting plate is arranged inside the bracket, and plug rods are arranged at both ends of the mounting plate, and docking holes corresponding to the plug rods are opened on the rotating shaft; The adjusting component is arranged in the middle of the bracket, and is used for controlling the insertion rod to dock with the docking hole.

5. The simplified fish-vegetable symbiosis equipment according to claim 2, characterized in that: The rotating connection structure also includes a limit guide assembly, which limits the lifting direction of the bearing frame when the buoyancy adjustment structure is working.

6. The simplified fish-vegetable symbiosis device according to claim 1, characterized in that: The buoyancy adjustment structure includes a buoyancy tank and at least two gravity adjustment components; The pontoon includes a lower box body and an upper box body that can be detachably connected, and the two ends of the lower box body are respectively connected to two connecting beams; Two gravity adjustment components are respectively arranged at two ends of the lower box body, and the gravity adjustment components are used to adjust the gravity received by the entire buoyancy box.

7. The simplified fish-vegetable symbiosis device according to claim 6, characterized in that: The gravity adjustment assembly includes a water pumping cylinder and a connecting rod coaxially arranged with the water pumping cylinder; The two ends of the water pump cylinder are respectively provided with a first opening and a second opening, and a piston block is provided inside the water pump cylinder, and the piston block divides the inner cavity of the water pump cylinder into two parts; The connecting rod is used to drive the piston block to move inside the pump cylinder.

8. The simplified fish-vegetable symbiosis device according to claim 6, characterized in that: The buoyancy adjustment structure also includes a synchronous adjustment structure, which is connected to the two gravity adjustment components. The synchronous adjustment structure is used to drive the two gravity adjustment components to synchronously adjust the buoyancy of the floating box.

9. The simplified fish-vegetable symbiosis device according to claim 8, characterized in that: The buoyancy regulating structure also includes a filtering component, which is connected to the two gravity adjusting components and is used for filtering the water entering the water pumping cylinder.

10. The simplified fish-vegetable symbiosis device according to claim 1, characterized in that: The four corners of the carrying frame are provided with fixing structures, and the fixing structures fix the nitrification assembly on the carrying frame.

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