Liquid manure fermentation device aerator

Abstract

The application discloses a kind of liquid excrement fermentation equipment aeration device, including fermentation tank, the upper end of the fermentation tank is equipped with upper cover, the sleeve of rotation is provided on the upper cover, the driving mechanism of driving sleeve rotation is installed on the upper cover, the piston block that can follow sleeve rotation is equipped in the sleeve, the connecting pipe of fixed connection is passed through and equipped on the piston block, the hollow reciprocating screw rod of fixed connection is connected at the bottom of the connecting pipe, the fixed plate is fixed in the fermentation tank, the reciprocating screw rod is passed through fixed plate and is connected with it cooperation.The application can effectively avoid liquid excrement through aeration hole into aeration pipe or block aeration hole, can be more effectively with liquid excrement contact time, effectively increase the oxygen content of liquid excrement, by crushing screen, gas bubble can be further broken down, to further increase the oxygen content in liquid excrement, beneficial to the fermentation work of liquid excrement, liquid excrement can also be broken down.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of liquid manure fermentation aeration, and particularly relates to a liquid manure fermentation equipment aeration device. BACKGROUND

[0002] The poultry manure composting fermentation treatment method is one of commonly used methods for harmless treatment of poultry manure, which utilizes various microorganisms to decompose organic components in the poultry manure, so as to improve the comprehensive utilization rate of the organic matter, and can basically kill pathogenic bacteria in the poultry manure, thereby reducing the harm caused by the poultry manure.

[0003] For example, application No. CN201922367911.9 provides a poultry manure fermentation tank for preparing organic fertilizer, which comprises a tank body, a first feeding pipe and a second feeding pipe are arranged on one side of the tank body, a first impeller pulverizer and a second impeller pulverizer are respectively arranged in the first feeding pipe and the second feeding pipe, guide rails are symmetrically arranged on the inner wall of the tank body, a turning machine is arranged on the top of the guide rails, and a ventilation main pipe is arranged at the bottom of the guide rails, a spraying pipe is arranged on one side of the guide rails, a plurality of grooves are arranged at the bottom of the tank body, an aeration pipe and a heating pipe are arranged in the grooves, a cover body is arranged above the grooves, the cover body is provided with a plurality of ventilation holes, a rocker is arranged on the outer wall of the aeration pipe, and a limiting groove corresponding to the movement track of the rocker is arranged on the outer wall of the tank body. The utility model is respectively directed to different raw materials for crushing pretreatment, and a rotatable aeration pipe is installed at the bottom of the fermentation tank and a spraying pipe is installed on the wall of the tank, so that the ventilation and water permeability in the composting process is effectively improved, and a local anaerobic environment is prevented from being formed at the bottom of the tank.

[0004] The manure fermentation device similar to the above-mentioned application still has the following problems: although the existing device can realize gas mixing through aeration, the spray holes are easy to be blocked, and the intermittent aeration mixing cannot be realized through structural improvement while stirring and mixing, and the blockage of the spray holes is also eliminated; secondly, the continuous aeration treatment causes the bubbles to float upward due to buoyancy, especially the liquid manure fermentation, the continuous aeration treatment cannot effectively increase the oxygen, which is not conducive to the fermentation of the manure and increases the energy consumption; therefore, the present application provides a liquid manure fermentation equipment aeration device. SUMMARY

[0005] The present application aims at solving the above technical problems, and provides a liquid manure fermentation equipment aeration device.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0007] The utility model provides an aeration device of liquid manure fermentation equipment, including fermentation tank, the upper end of fermentation tank is installed with upper cover, is equipped with the sleeve that rotates to be equipped with on the upper cover, the driving mechanism of driving sleeve rotation is installed on the upper cover, be equipped with the piston block that can follow sleeve rotation in the sleeve, fixedly connected connection pipe is equipped with on the piston block, the bottom of connection pipe is fixedly connected with the hollow setting reciprocating screw rod, fixed plate is fixed in the fermentation tank, reciprocating screw rod penetrates fixed plate and is connected with it in coordination, the lower end of reciprocating screw rod is fixed with the delivery pipe, the bottom of delivery pipe is fixed with the mounting block, a plurality of spiral leaves are fixed on the mounting block, two short tubes are fixed on the delivery pipe, a plurality of aeration pipes are fixed on the upper end of short tube, a plurality of aeration holes are equipped on the aeration pipe, the rubber sleeve of a plurality of aeration pipes is fixed on the outside of aeration pipe, the guide cylinder of reciprocating screw rod, delivery pipe and spiral leaf is fixed in the fermentation tank, the broken net plate is fixedly connected in the guide cylinder, the upper cover is installed with the air feeding mechanism that is connected with driving mechanism and is sent to the air of aeration pipe place intermittently.

[0008] Preferably, the upper end of the upper cover is provided with an adding pipe, and the adding pipe is provided with a shielding cover.

[0009] Preferably, the driving mechanism comprises a motor mounted on the upper cover, the output end of the motor is fixedly connected with a driving shaft, the first transmission wheel is fixed on the driving shaft, the second transmission wheel is mounted on the sleeve, and the first transmission wheel and the second transmission wheel are connected by a belt.

[0010] Preferably, the inside of the sleeve is a rectangular cavity, and the piston block is rectangular.

[0011] Preferably, the outer wall of the guide cylinder is fixedly connected with four supporting blocks.

[0012] Preferably, the middle part of the broken net plate is provided with a through groove, and the reciprocating screw rod is arranged through the through groove.

[0013] Preferably, the air feeding mechanism comprises a supporting seat fixed on the upper end of the upper cover, a piston cylinder mounted on the supporting seat, a moving piston slidably connected in the piston cylinder, a connecting rod hingedly connected to the moving piston, a driving disc fixed on the upper end of the driving shaft, the other end of the connecting rod is eccentrically hingedly connected with the driving disc, an air inlet pipe mounted on the piston cylinder, an air inlet check valve mounted on the air inlet pipe, a rotary joint coaxially mounted on the upper end of the sleeve, an air outlet pipe mounted on the rotary joint, the air outlet pipe is connected with the piston cylinder, and an air outlet check valve is mounted on the air outlet pipe.

[0014] Preferably, the air inlet one-way valve only allows air to enter the piston cylinder through the air inlet pipe, and the air outlet one-way valve only allows air to flow into the air outlet pipe through the piston cylinder.

[0015] Compared with the prior art, the present application has the following advantages:

[0016] 1. The reciprocating screw rod rotates to drive the conveying pipe to rotate, the conveying pipe drives the mounting block to rotate, the mounting block drives the spiral blade to rotate, and the spiral blade rotates in the flow guide cylinder. In this way, the liquid manure can be upwardly conveyed and guided by the flow guide cylinder, so that the liquid manure can circulate in the fermentation tank, the liquid manure can be stirred, and the fermentation work is facilitated.

[0017] 2. When the mounting block rotating and close to the broken mesh plate drives the spiral blade to rotate, the liquid manure can be upwardly conveyed, and the upwardly flowing liquid manure is close to the broken mesh plate, so that the impact effect on the broken mesh plate is better. Not only can the solid manure in the liquid manure be effectively broken, but also the clogged broken mesh plate can be better cleared. Since the rotating rod of the spiral blade can generate bubbles in the liquid manure, the effect of clearing the broken mesh plate is further improved.

[0018] 3. When the pressure in the aeration pipe is not enough to lift the rubber sleeve away from the aeration pipe, as the pressure in the aeration pipe increases, the rubber sleeve is no longer shielded from the aeration pipe, and the air in the aeration pipe is discharged through the aeration hole. After the aeration pipe discharges the air, the pressure decreases, the rubber sleeve resets and wraps around the outside of the aeration pipe again and shields the aeration hole. In this way, the liquid manure can be effectively prevented from entering the aeration pipe through the aeration hole or blocking the aeration hole.

[0019] 4. The continuous operation of the motor can intermittently deliver air into the sleeve, so the pressure in the aeration pipe is gradually increased, and the aeration pipe can intermittently aerate the liquid manure. In this way, the investment in aeration equipment can be reduced.

[0020] 5. Intermittent aeration treatment will not cause continuous generation of a large number of bubbles, which will increase the upward flow speed. Compared with continuous aeration treatment, the upward movement speed of the bubbles is reduced, thereby increasing the contact time with the liquid manure, which is beneficial to increasing the oxygen content in the liquid manure and facilitating the fermentation work.

[0021] 6. The rotation of the spiral blade and the short pipe causes the liquid manure to flow upward in a spiral manner, thereby driving the generated bubbles to flow upward. The bubbles generated by aeration enter the liquid manure in a spiral manner, thereby increasing the contact time with the liquid manure and effectively increasing the oxygen content in the liquid manure. When the bubbles pass through the broken mesh plate, the broken mesh plate can further break the bubbles, thereby further increasing the oxygen content in the liquid manure and facilitating the fermentation work of the liquid manure.

[0022] Therefore, the liquid manure fermentation equipment aeration device can effectively avoid liquid manure entering the aeration pipe through the aeration hole or blocking the aeration hole, can be more effectively contacted with liquid manure, can effectively increase the oxygen content of liquid manure, can further break the bubbles through the breaking net plate, thereby further increasing the oxygen content in the liquid manure, is beneficial to the fermentation work of the liquid manure, and can also break the liquid manure. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 A structural schematic view of a liquid manure fermentation equipment aeration device is provided for the present application;

[0024] Figure 2 A side view of a liquid manure fermentation equipment aeration device is provided for the present application;

[0025] Figure 3 A sectional view of a liquid manure fermentation equipment aeration device is provided for the present application;

[0026] Figure 4 A structural schematic view of a flow guide cylinder in a liquid manure fermentation equipment aeration device is provided for the present application;

[0027] Figure 5 A structural schematic view of a spiral blade in a liquid manure fermentation equipment aeration device is provided for the present application;

[0028] Figure 6 A structural schematic view of a short pipe in a liquid manure fermentation equipment aeration device is provided for the present application;

[0029] Figure 7 A structural schematic view of an aeration pipe in a liquid manure fermentation equipment aeration device is provided for the present application.

[0030] In the figure: 1 fermentation tank, 2 upper cover, 3 adding pipe, 4 motor, 5 sleeve, 6 first transmission wheel, 7 second transmission wheel, 8 belt, 9 driving shaft, 10 driving disc, 11 piston cylinder, 12 rotary joint, 13 air outlet pipe, 14 moving piston, 15 supporting seat, 16 connecting rod, 17 air inlet one-way valve, 18 air inlet pipe, 19 air outlet one-way valve, 20 connecting pipe, 21 fixed plate, 22 flow guide cylinder, 23 supporting block, 24 reciprocating screw rod, 25 breaking net plate, 26 piston block, 27 conveying pipe, 28 mounting block, 29 spiral blade, 30 short pipe, 31 rubber sleeve, 32 aeration pipe, 33 aeration hole. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all.

[0032] Reference Figures 1-7 A liquid manure fermentation equipment aeration device, including fermentation tank 1, the upper end of fermentation tank 1 is installed with upper cover 2, upper cover 2 can be connected with fermentation tank 1 through bolt or buckle form, ensure the sealing while also ensure the stability of connection; Wherein, the bottom of one side of fermentation tank 1 or bottom can install discharge pipe, the valve is installed on the discharge pipe correspondingly, in order to discharge the liquid manure after fermentation is completed;

[0033] In addition, the upper end of upper cover 2 is installed with adding pipe 3, the cover is installed on adding pipe 3, through adding pipe 3, it is convenient to add liquid manure to fermentation tank 1;In addition, since adding pipe 3 is sealed, fermentation tank 1 is in sealed state, can install pressure relief valve on upper cover 2, to ensure that the inside of fermentation tank 1 is in the safe pressure range;

[0034] Upper cover 2 is provided with sleeve 5 rotatingly arranged, and a driving mechanism for driving sleeve 5 to rotate is installed on upper cover 2, the driving mechanism is further explained as follows: the driving mechanism includes a motor 4 installed on the upper cover 2, a driving shaft 9 fixedly connected to the output end of the motor 4, a first transmission wheel 6 fixedly connected to the driving shaft 9, a second transmission wheel 7 installed on the sleeve 5, and the first transmission wheel 6 and the second transmission wheel 7 are connected by a belt 8;When the motor 4 works, the driving shaft 9 can be driven to rotate, the first transmission wheel 6 is driven to rotate by the driving shaft 9, and the second transmission wheel 7 is driven to rotate by the first transmission wheel 6 under the transmission of the belt 8, and the sleeve 5 is driven to rotate by the second transmission wheel 7;

[0035] The sleeve 5 is provided with a piston block 26 capable of rotating with the sleeve 5, the inside of the sleeve 5 is a rectangular cavity, and the piston block 26 is rectangular, so that when the sleeve 5 rotates, the piston block 26 can rotate together, and the piston block 26 can move up and down in the sleeve 5;

[0036] The piston block 26 is provided with a connecting pipe 20 fixedly connected therethrough, the connecting pipe 20 can be connected with the sleeve 5, the bottom of the connecting pipe 20 is fixedly connected with a hollow reciprocating screw rod 24, and the connecting pipe 20 is connected with the reciprocating screw rod 24;The fermentation tank 1 is fixedly provided with a fixed plate 21, the reciprocating screw rod 24 penetrates through the fixed plate 21 and is connected therewith, the fixed plate 21 is provided with a circular groove penetrating therethrough, the circular groove is fixedly provided with a protrusion, the reciprocating screw rod 24 penetrates through the circular groove and slides in the protrusion on the reciprocating screw rod 24;

[0037] The lower end of the reciprocating screw rod 24 is fixed with a conveying pipe 27, which is communicated with the hollow reciprocating screw rod 24; the bottom of the conveying pipe 27 is fixed with a mounting block 28, and a plurality of spiral blades 29 are fixed on the mounting block 28; since the piston block 26 can rotate with the sleeve 5, when the piston block 26 rotates with the sleeve 5, the piston block 26 drives the connecting pipe 20 to rotate, the connecting pipe 20 drives the reciprocating screw rod 24 to rotate, the reciprocating screw rod 24 drives the conveying pipe 27 to rotate, the conveying pipe 27 drives the mounting block 28 to install, and the mounting block 28 drives the spiral blades 29 to rotate; the spiral blades 29 rotate and rotate in the flow guide cylinder 22, so that the liquid manure can be upwardly conveyed and guided by the flow guide cylinder 22;

[0038] Two short pipes 30 are fixed on the conveying pipe 27, a plurality of aeration pipes 32 are fixed on the upper end of the short pipe 30, a plurality of aeration holes 33 are arranged on the aeration pipe 32, a rubber sleeve 31 is fixed on the short pipe 30 and wrapped outside the aeration pipe 32, so that the liquid manure cannot flow back into the aeration pipe 32 or block the aeration holes 33;

[0039] The flow guide cylinder 22 is fixed in the fermentation tank 1 and located outside the reciprocating screw rod 24, the conveying pipe 27 and the spiral blades 29; four supporting blocks 23 are fixed on the outer wall of the flow guide cylinder 22 and fixedly connected with the inner wall of the fermentation tank 1;

[0040] The broken mesh plate 25 is fixedly connected in the flow guide cylinder 22, a through slot is arranged in the middle of the broken mesh plate 25, and the reciprocating screw rod 24 is arranged through the through slot; the air feeding mechanism is connected with the driving mechanism and intermittently feeds air to the aeration pipe 32; the air feeding mechanism is further explained: the driving shaft 9 drives the driving disc 10 to rotate, the driving disc 10 drives the connecting rod 16 to reciprocate, the connecting rod 16 drives the moving piston 14 to reciprocate in the piston cylinder 11; when the moving piston 14 moves towards the motor 4, the piston cylinder 11 is in a negative pressure state, and external air can enter the piston cylinder 11 through the air inlet pipe 18 and the air inlet one-way valve 17; when the moving piston 14 moves away from the motor 4, the moving piston 14 extrudes the air in the piston cylinder 11, and the air in the piston cylinder 11 can be fed to the rotary joint 12 through the air outlet one-way valve 19 and the air outlet pipe 13; the air is fed to the sleeve 5 through the rotary joint 12; since the rotary joint 12 is arranged, air can be continuously fed to the sleeve 5 when the sleeve 5 rotates;

[0041] The air feeding mechanism comprises a supporting seat 15 fixed to the upper end of the upper cover 2, a piston cylinder 11 installed on the supporting seat 15, a moving piston 14 slidably connected in the piston cylinder 11, a connecting rod 16 hingedly connected to the moving piston 14, a driving disc 10 fixed to the upper end of the driving shaft 9, the other end of the connecting rod 16 being eccentrically hingedly connected to the driving disc 10, an air inlet pipe 18 installed on the piston cylinder 11, an air inlet one-way valve 17 installed on the air inlet pipe 18, a rotary joint 12 coaxially installed on the upper end of the sleeve 5, an air outlet pipe 13 installed on the rotary joint 12, the air outlet pipe 13 being connected to the piston cylinder 11, and an air outlet one-way valve 19 installed on the air outlet pipe 13, the air inlet one-way valve 17 allowing air to enter the piston cylinder 11 only through the air inlet pipe 18, and the air outlet one-way valve 19 allowing air to flow to the air outlet pipe 13 only through the piston cylinder 11.

[0042] When the present application is used, the motor 4 is started, the motor 4 can drive the driving shaft 9 to rotate, the driving shaft 9 drives the first transmission wheel 6 to rotate, the first transmission wheel 6 drives the second transmission wheel 7 to rotate under the transmission of the belt 8, the second transmission wheel 7 drives the sleeve 5 to rotate, since the inside of the sleeve 5 is a rectangular cavity and the piston block 26 is rectangular, when the sleeve 5 rotates, the piston block 26 can rotate together, at the same time, the piston block 26 can move up and down in the sleeve 5, after the piston block 26 rotates with the sleeve 5, the piston block 26 drives the connecting pipe 20 to rotate, the connecting pipe 20 drives the reciprocating screw rod 24 to rotate, the reciprocating screw rod 24 drives the conveying pipe 27 to rotate, the conveying pipe 27 drives the mounting block 28 to rotate, the mounting block 28 drives the spiral blade 29 to rotate, the spiral blade 29 rotates in the flow guide cylinder 22, so that the liquid manure can be upwardly conveyed and guided by the flow guide cylinder 22, thereby realizing the circulation of the liquid manure in the fermentation tank 1.

[0043] When the flowing liquid manure passes through the crushing net plate 25, since the liquid manure impacts on the crushing net plate 25, the solid manure in the liquid manure can be crushed by the crushing net plate 25, but part of the crushing net plate 25 can be blocked, but the upward flow of the liquid manure has a moving impact force, thereby achieving the effect of unblocking the blocked crushing net plate 25.

[0044] When the reciprocating screw rod 24 rotates, it moves up and down on the fixed plate 21, so the reciprocating screw rod 24 drives the connecting pipe 20 to move up and down, the connecting pipe 20 drives the piston block 26 to move up and down, the piston block 26 moves up and down in the sleeve 5, the reciprocating screw rod 24 drives the delivery pipe 27, the mounting block 28 and the short pipe 30 to move up and down and rotate, when the mounting block 28 close to the broken mesh plate 25 drives the spiral blade 29 to rotate, it can deliver the liquid manure upwards, and the upward flowing liquid manure close to the broken mesh plate 25, so that the effect of impacting the broken mesh plate 25 is better, not only can effectively break the solid manure in the liquid manure, but also can better clear the broken mesh plate 25, because the rotating rod of the spiral blade 29 can generate bubbles in the liquid manure, so as to further improve the effect of clearing the broken mesh plate 25;

[0045] The driving shaft 9 rotates to drive the driving disc 10 to rotate, the driving disc 10 rotates to drive the connecting rod 16 to move reciprocally, the connecting rod 16 moves reciprocally to drive the moving piston 14 to move reciprocally in the piston cylinder 11, when the moving piston 14 moves close to the motor 4, at this time, the piston cylinder 11 is in a negative pressure state, the external air can enter the piston cylinder 11 through the air inlet pipe 18 and the air inlet one-way valve 17, when the moving piston 14 moves away from the motor 4, the moving piston 14 extrudes the air in the piston cylinder 11, the air in the piston cylinder 11 can be delivered to the rotary joint 12 through the air outlet one-way valve 19 and the air outlet pipe 13, the air is delivered to the sleeve 5 through the rotary joint 12, because the rotary joint 12 is arranged, when the sleeve 5 rotates, it can still continuously deliver air to the sleeve 5;

[0046] As described above, the air can be intermittently delivered to the sleeve 5, with the increase of the air in the sleeve 5, the air in the sleeve 5 is delivered to the short pipes 30 on both sides through the connecting pipe 20, the hollow reciprocating screw rod 24 and the delivery pipe 27, and finally delivered to the aeration pipe 32, because the outside of the aeration pipe 32 is wrapped by the rubber sleeve 31, when the pressure in the aeration pipe 32 is not enough to lift the rubber sleeve 31 and move away from the aeration pipe 32, with the increase of the pressure in the aeration pipe 32, the rubber sleeve 31 moves away from the aeration pipe 32 and no longer shields it, the air in the aeration pipe 32 is discharged through the aeration hole 33, after the aeration pipe 32 discharges the air, the pressure decreases, the rubber sleeve 31 resets and wraps the outside of the aeration pipe 32 again and shields the aeration hole 33, so that the liquid manure can be effectively prevented from entering the aeration pipe 32 through the aeration hole 33 or blocking the aeration hole 33;

[0047] The continuous operation of the motor 4 can intermittently deliver air into the sleeve 5, so the pressure in the aeration pipe 32 is gradually increased, and the aeration pipe 32 can intermittently aerate the liquid manure, so that the investment of the aeration equipment can be reduced, and the intermittent aeration treatment will not cause a large number of bubbles to be generated continuously, so that the upward flow speed is increased, the upward speed of the bubbles is reduced compared with the continuous aeration treatment, so that the time with the liquid manure is increased, which is beneficial to increase the oxygen capacity in the liquid manure and is beneficial to the fermentation work.

[0048] Due to the rotation of the spiral blade 29, the liquid manure is not simply straight-flowing in the flow guide cylinder 22, but has a spiral upward flow due to the rotation of the spiral blade 29 and the short pipe 30, so as to drive the generated bubbles to flow upward, and also make the bubbles generated by aeration enter the liquid manure in a spiral manner, so that the contact time with the liquid manure can be more effective, and the oxygen content of the liquid manure can be effectively increased; when the bubbles pass through the crushing grid 25, the bubbles can be further crushed by the crushing grid 25, so as to further increase the oxygen content in the liquid manure, and be beneficial to the fermentation work of the liquid manure.

[0049] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A liquid manure fermentation plant aeration device, comprising a fermentation tank (1), characterized in that, The upper end of the fermentation tank (1) is provided with an upper cover (2), a sleeve (5) is arranged on the upper cover (2) and is rotatable, a driving mechanism for driving the sleeve (5) to rotate is arranged on the upper cover (2), a piston block (26) capable of rotating with the sleeve (5) is arranged in the sleeve (5), a connecting pipe (20) is fixedly connected to the piston block (26), a hollow reciprocating screw rod (24) is fixedly connected to the bottom of the connecting pipe (20), a fixed plate (21) is fixedly arranged in the fermentation tank (1), the reciprocating screw rod (24) penetrates through the fixed plate (21) and is connected thereto, a conveying pipe (27) is fixedly connected to the lower end of the reciprocating screw rod (24), a mounting block (28) is fixedly arranged at the bottom of the conveying pipe (27), a plurality of spiral blades (29) are fixedly arranged on the mounting block (28), two short pipes (30) are fixedly arranged on the conveying pipe (27), a plurality of aeration pipes (32) are fixedly arranged at the upper end of the short pipes (30), a plurality of aeration holes (33) are arranged on the aeration pipes (32), a rubber sleeve (31) is fixedly arranged on the short pipes (30) and surrounds the aeration pipes (32), a flow guide cylinder (22) is fixedly arranged in the fermentation tank (1) and surrounds the reciprocating screw rod (24), the conveying pipe (27) and the spiral blades (29), a broken mesh plate (25) is fixedly connected to the flow guide cylinder (22), and an air feeding mechanism is arranged on the upper cover (2) and is connected to the driving mechanism and capable of intermittently feeding air to the aeration pipes (32). The driving mechanism comprises a motor (4) arranged on the upper cover (2), a driving shaft (9) fixedly connected to the output end of the motor (4), and a first transmission wheel (6) fixedly arranged on the driving shaft (9), wherein a second transmission wheel (7) is arranged on the sleeve (5) and connected to the first transmission wheel (6) through a belt (8). The air feeding mechanism comprises a support seat (15) fixedly arranged at the upper end of the upper cover (2), a piston cylinder (11) arranged on the support seat (15), a movable piston (14) slidably connected to the piston cylinder (11), a connecting rod (16) hingedly connected to the movable piston (14), a driving disc (10) fixedly arranged at the upper end of the driving shaft (9), and an eccentric hinged connection between the other end of the connecting rod (16) and the driving disc (10), wherein an air inlet pipe (18) is arranged on the piston cylinder (11), an air inlet check valve (17) is arranged on the air inlet pipe (18), a rotary joint (12) is coaxially arranged at the upper end of the sleeve (5), an air outlet pipe (13) is arranged on the rotary joint (12), the air outlet pipe (13) is connected to the piston cylinder (11), and an air outlet check valve (19) is arranged on the air outlet pipe (13).

2. A liquid manure fermentation apparatus aeration device according to claim 1, characterized in that An adding pipe (3) is arranged at the upper end of the upper cover (2), and a shielding cover is arranged on the adding pipe (3).

3. The liquid manure fermentation apparatus aeration device according to claim 1, characterized in that, The inside of the sleeve (5) is a rectangular cavity, and the piston block (26) is rectangular.

4. The liquid manure fermentation apparatus aeration device according to claim 1, characterized in that, Four support blocks (23) are fixedly arranged on the outer wall of the flow guide cylinder (22), and the support blocks (23) are fixedly connected to the inner wall of the fermentation tank (1).

5. The liquid manure fermentation apparatus aeration device according to claim 1, characterized in that, The middle part of the crushing net plate (25) is provided with a through slot, and the reciprocating wire rod (24) is arranged through the through slot.

6. A liquid manure fermentation apparatus aeration device according to claim 1, characterized in that, The air inlet one-way valve (17) only allows air to enter into the piston cylinder (11) through the air inlet pipe (18), and the air outlet one-way valve (19) only allows air to flow into the air outlet pipe (13) through the piston cylinder (11).

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