Liquid fertilizer production device

Abstract

The invention relates to the technical field of liquid fertilizer production and processing, and discloses a liquid fertilizer production device which comprises an upper tank body, an exhaust tank, a fermentation tank, a filtering tank and a crushing tank, the conical bottom end of the upper tank body is fixedly connected with the top end of the exhaust tank, and the bottom of the exhaust tank is fixedly connected with the arc-shaped top wall surface of the fermentation tank. Through the arrangement of the upper tank body, the exhaust tank, the fermentation tank, the connection pipe, the filtering tank, the extrusion pipe, the crushing tank, the multi-stage crushing assembly, the squeezing assembly and the filtering assembly, liquid fertilizer production and processing can be carried out on green plants in an integrated operation mode, and integration to a certain degree is achieved; the production and processing efficiency of preparing the liquid fertilizer from green plants is improved. According to the multi-stage crushing and cutting device, through the arrangement of the multiple stages of crushing assemblies and the multiple sets of cutting units, when materials pass through the crushing tank, the crushing ring bodies and the crushing blades can perform multiple times of crushing and cutting treatment on the passing materials, and the crushing and cutting efficiency of the passing materials is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of liquid fertilizer production and processing, and in particular relates to a liquid fertilizer production device. Background Art

[0002] With the popularization of organic agriculture and green planting concepts, natural liquid fertilizers prepared from fermented plant raw materials have become an important direction to replace chemical fertilizers because they are rich in amino acids, small molecule organic matter and probiotics required for plant growth.

[0003] Traditional green plant liquid fertilizer production technology often involves standalone equipment, with a typical production line consisting of crushing, pressing, filtration, and fermentation. Juice extraction typically uses a small press or extruder to separate the solid and liquid. Fermentation involves mixing the filtrate with brown sugar and transferring it to a separate fermentation vessel, relying on natural fermentation. This traditional technology requires constant manual material transfer, which not only increases labor intensity but also can introduce bacteria due to open-work operations, impacting fertilizer quality. To address these issues, a more integrated, environmentally friendly, and sustainable liquid fertilizer production device is urgently needed.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0006] A liquid fertilizer production device comprises an upper tank body, an exhaust tank, a fermentation tank, a filter tank and a crushing tank. The upper tank body is a hollow cone. A feeding port is provided on the top of the upper tank body and a sealed tank door is installed at the feeding port. The conical bottom end of the upper tank body is fixedly connected to the top end of the exhaust tank. The bottom of the exhaust tank is fixedly connected to the curved top wall of the fermentation tank. The bottom of the fermentation tank is in a conical downward state. A second electromagnetic valve is fixedly installed on the conical bottom of the fermentation tank. Arc-shaped connecting pipes bent upward are fixedly connected to the outer walls of both sides of the fermentation tank. There are two groups of filter tanks and crushing tanks. Each group of filter tanks is fixedly connected to the top end of the connecting pipe on the corresponding side. , a third solenoid valve is fixedly installed on the inner wall above the cavity of each connecting pipe, and an extrusion tube is fixedly installed on the top of each group of filter tanks, and the other end of the extrusion tube is fixedly connected to the crushing tank in an inclined state. The two groups of crushing tanks are fixedly penetrated through the two side walls of the upper tank body respectively and the two groups of crushing tanks are extended into the cavity of the upper tank body. The through connection between the crushing tank and the wall of the upper tank body is in a sealed state. One end of the two groups of crushing tanks located in the cavity of the upper tank body is fixedly connected together and the fixed connection end forms a ring. The top of the fixed connection end of the two groups of crushing tanks is fixedly connected to a feed hopper, which is trumpet-shaped and fixedly connected to the feeding port on the top of the upper tank body;

[0007] The cavities of the two sets of crushing tanks are equipped with a multi-stage crushing assembly for crushing the material. The multi-stage crushing assembly includes a crushing column located at the center of the crushing tank cavity, and multiple sets of cutting units are provided on the outer wall of the crushing column. When the material passes through the multiple sets of cutting units, multi-stage crushing processing is achieved;

[0008] A pressing assembly for intermittently pressing the material downward is provided between each group of crushing tanks and the corresponding extrusion tube. The pressing assembly is provided together with the crushing column.

[0009] A plurality of filter components capable of intermittent reciprocating shaking are arranged in the cavity of each filter tank.

[0010] As a preferred embodiment of the present invention, a hood is installed in the cavity of the fixed connecting ends of the two groups of crushing cans through a bracket, a first servo motor is fixedly installed in the hood, and a first bevel gear is fixedly installed on the output end of the first servo motor through a shaft coupling. The crushing column and one side outer wall of the hood are rotatably installed together through a bearing, and a second bevel gear is fixed on one end of the crushing column located in the hood cavity, and the second bevel gear is meshed with the first bevel gear; the cutting unit includes a crushing ring body, a connecting rod, a crushing rod, a crushing blade and a fixed sleeve. The crushing ring body is a ring body, and the upper and lower end walls of the crushing ring body are conical surfaces with gradually decreasing thickness. There are multiple connecting rods and the multiple connecting rods are respectively fixedly installed between the crushing ring body and the fixed sleeve. The fixed sleeve and the crushing column are fixed together by bolts. The crushing rod is movably arranged at the middle position of each connecting rod and the crushing rod passes through the connecting rod, and the crushing blade is fixedly installed on the wall of each crushing rod.

[0011] As a preferred embodiment of the present invention, the length of the crushing blade along the center line direction of the crushing rod gradually decreases and then gradually increases, and the crushing blades on both sides of the crushing rod are symmetrical; a limited swing groove is provided at the center position of the connecting rod, and a limited rod is fixedly installed at the center position of the limited swing groove, and the limit rod is rotatably connected to the limited swing groove; protective leather covers are fixedly sleeved on the outer walls of the crushing rods on both sides of the limited swing groove, and the protective leather covers are arc-shaped; a slide is provided at the upper inner wall of the connecting rod away from the crushing column, and the slide is connected to the limited swing groove; a first spring is fixedly installed on the inner wall of the slide cavity, and the other end of the first spring is fixedly connected to a counterweight block, and the counterweight block is slidably connected to the slide; a stop ring is fixed on the inner wall of the slide near the limited swing groove, a wire hole is provided in the center of the stop ring, and an annular rubber sleeve is fixed on the inner wall of the guide hole; a steel wire rope is fixed on one end of the counterweight block near the stop ring, and the other end of the steel wire rope is fixedly connected to the upper side wall of the crushing rod in the limited swing groove cavity after passing through the rubber sleeve.

[0012] The locking plate is fixedly mounted on the top of the support frame of the lifting post, and the locking plate is fixedly mounted on the support frame of the lifting post to lock the lifting post.

[0013] As a preferred embodiment of the present invention, a pressing block is movably provided in the cavity of the extrusion tube, a mounting plate is fixedly installed on the upper inner wall of the crushing tank, and a plurality of groups of first telescopic rods are fixedly installed between the bottom of the mounting plate and the top of the pressing block, and a return spring is inserted into the outer wall of each first telescopic rod, and the two ends of the return spring are also fixedly connected to the wall of the mounting plate and the pressing block respectively. The pressing block is provided with an inclined pressing avoidance surface near the lower inner wall of the crushing tank cavity, and the thickness of the pressing block is smallest near the lower inner wall of the crushing tank cavity. A first filter plate is fixedly installed on the lower inner wall of the cavity of the extrusion tube, and the first filter plate and the pressing avoidance surface are parallel to each other. The pressing block is an inclined slope surface near the lower inner wall of the crushing tank cavity, and an elastic material blocking net is also fixedly installed between the end with the smallest thickness of the pressing block and the material blocking plate.

[0014] As a preferred embodiment of the present invention, the filter assembly cooperates with the pressing block in the extrusion tube cavity, and the filter assembly includes a second filter plate, which is a frustum with a hollow bottom. An annular filter plate is fixedly connected to the outer wall of the annular bottom of the second filter plate. The annular filter plate is slidably connected to the inner wall of the filter tank cavity. Multiple groups of second telescopic rods are fixedly connected between the two adjacent annular filter plates above and below, and a second spring is inserted into the outer wall of each second telescopic rod. The upper and lower ends of the second spring are respectively fixedly connected to the wall of the annular filter plate on the corresponding side. A second telescopic rod and a second spring are also installed between the uppermost annular filter plate and the top wall of the cavity of the filter tank.

[0015] As a preferred embodiment of the present invention, a vertically downward linkage rod is fixedly installed on the pressing avoidance surface, and the linkage rod always movably penetrates the first filter plate. The linkage rod extends into the cavity of the filter tank, and the bottom end of the linkage rod corresponds to the position of the second filter plate on the uppermost side of the cavity of the filter tank. A guide groove with a gradually decreasing inner diameter is provided on the bottom wall of the cavity of each filter tank, and the bottom end of the guide groove corresponds to the top position of the connecting pipe and the two are sealed and fixedly connected; a plurality of sets of temperature-adjustable heaters are also fixedly installed in the conical bottom wall of the fermentation tank.

[0016] As a preferred embodiment of the present invention, an exhaust valve is fixedly installed on one side of the top of the upper tank body, a first electromagnetic valve is fixedly installed on the upper inner wall of the exhaust tank cavity, a feeding pipe is fixedly installed on the lower outer wall of one side of the exhaust tank, and an insulation layer is fixedly provided on the outer walls of the upper tank body, the exhaust tank, the fermentation tank and the connecting pipe.

[0017] As a preferred embodiment of the present invention, a second servo motor is fixedly installed on the lower inner wall of the cavity of the exhaust tank through a bracket, and the output end of the second servo motor is fixedly connected to a stirring rod extending into the fermentation tank cavity through a shaft coupling, and a plurality of groups of stirring fan plates are fixed on the outer wall of the stirring rod, and the stirring fan plates are triangular in shape. The second servo motor is located above the feeding pipe.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention realizes the production and processing of liquid fertilizer for green plants in an integrated manner through the arrangement of the upper tank body, exhaust tank, fermentation tank, connecting pipe, filter tank, extrusion tube, crushing tank, multi-stage crushing component, pressing component, and filtering component, achieves a certain degree of integration, and improves the production and processing efficiency of liquid fertilizer for green plants.

[0020] 2. The present invention adopts the multi-stage crushing assembly and multiple cutting units to realize that when the material passes through the crushing tank, the crushing ring and the crushing blades can perform multiple crushing and cutting processes on the passing material, thereby ensuring the crushing and cutting efficiency of the passing material.

[0021] 2. This solution sets up multiple sets of cutting units. When the speed of the first servo motor is controlled to increase, the centrifugal force increases, causing the counterweight to slide along the inner wall of the slideway to the side away from the crushing column, causing the first spring to be compressed. At this time, the moving counterweight pulls the crushing rod to one side through the wire rope. After being pulled, the crushing rod is in an inclined state. When multiple sets of crushing rods are in an inclined state, the contact efficiency between the crushing blade and the passing material can be improved, so that the material can be further fully crushed, thereby improving the crushing efficiency of the plant material.

[0022] 3. This solution uses a multi-stage crushing component and a pressing component, and the two work in coordination with each other and complement each other in function. After the pressing block is indirectly driven downward by the crushing column, the pressing block will squeeze the material and juice falling on the first filter plate, further squeezing out the juice inside the material, and the working direction of the first servo motor can be controlled by timing to achieve reciprocating squeezing, thereby improving the squeezing efficiency of the crushed material and avoiding the problem of incomplete one-time squeezing.

[0023] 4. In this scheme, the filter assembly and the pressing assembly are provided, and the use of the two also plays a role of mutual cooperation. When the linkage rod is driven downward, the linkage rod enters the cavity of the filter tank, and the bottom end of the linkage rod presses the second filter plate on the uppermost side. The fixed rod on the uppermost side will move downward. Then, the second filter plate on the lower side will also move downward under the action of the second spring and the second telescopic rod. Finally, the multiple second filter plates in each filter tank cavity will move downward. When the pressing block is reset, under the elastic force of the second spring, the multiple groups of second springs in the filter tank cavity are in a state of slow shaking. Because the force of the second spring gradually tends to be stable, the slow shaking of the multiple groups of second filter plates can appropriately speed up the filtration of the juice falling above. In the process of shaking, the flow of juice can be accelerated. At the same time, proper shaking can also avoid the problem of juice gathering together and easily causing blockage.

[0024] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In the attached figure:

[0026] Figure 1 It is an overall three-dimensional diagram of the present invention;

[0027] Figure 2 It is a cross-sectional view of the present invention;

[0028] Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle;

[0029] Figure 4 For the present invention Figure 3 Enlarged view of point B in the middle;

[0030] Figure 5 For the present invention Figure 4 Enlarged view of point C in the middle;

[0031] Figure 6 For the present invention Figure 2 Enlarged view of point D in the middle;

[0032] Figure 7A three-dimensional diagram of the multi-stage crushing assembly and cutting unit of the present invention;

[0033] Figure 8 A bottom view of the multi-stage crushing assembly and cutting unit of the present invention;

[0034] Figure 9 A three-dimensional diagram of the cutting unit of the present invention;

[0035] Figure 10 This is a three-dimensional diagram of the cutting unit after the crushing bar of the present invention is tilted;

[0036] Figure 11 A three-dimensional diagram of a crushing ring body according to the present invention;

[0037] Figure 12 A three-dimensional diagram of the connecting rod and the crushing rod of the present invention;

[0038] Figure 13 A perspective view of the crushing rod and crushing blade of the present invention;

[0039] Figure 14 It is a three-dimensional diagram of the second filter plate and the annular filter plate of the present invention;

[0040] Figure 15 A three-dimensional diagram of the pressing block of the present invention;

[0041] Figure 16 A three-dimensional diagram of the pressing block and the first filter plate of the present invention;

[0042] Figure 17 A three-dimensional diagram of the pressing block, the first filter plate and the linkage rod of the present invention;

[0043] Figure 18 This is a three-dimensional diagram of the stirring fan plate of the present invention.

[0044] In the figure: 10, upper tank body; 11, exhaust tank; 12, fermentation tank; 13, connecting pipe; 14, filter tank; 15, extrusion pipe; 16, crushing tank; 17, feed hopper; 18, sealing tank door; 19, exhaust valve; 20, first solenoid valve; 21, insulation layer; 22, second solenoid valve; 23, feeding pipe; 24, third solenoid valve; 30, first servo motor; 31, machine cover; 32, first bevel gear; 33, second bevel gear; 34, crushing column; 35, fixing sleeve; 36, connecting rod; 37, crushing ring; 38, crushing rod; 39, crushing blade; 40, limited swing groove; 41. Limit rod; 42. Protective leather cover; 43. Slide; 44. First spring; 45. Counterweight; 46. Wire rope; 47. Stop ring; 50. Threaded groove; 51. Threaded drive rod; 52. Material baffle; 53. Fixed rod; 54. Limiting sleeve; 55. Pressing block; 56. Mounting plate; 57. First telescopic rod; 58. First filter plate; 59. Linking rod; 60. Second servo motor; 61. Stirring rod; 62. Stirring fan plate; 63. Second filter plate; 64. Annular filter plate; 65. Second spring; 66. Second telescopic rod; 67. Guide groove; 68. Pressing avoidance surface; 69. Material baffle net. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention.

[0046] A liquid fertilizer production device, such as Figure 1 、 Figure 2As shown, it includes an upper tank body 10, an exhaust tank 11, a fermentation tank 12, a filter tank 14 and a crushing tank 16. The bottom of the fermentation tank 12 is fixedly connected with a plurality of supporting legs. The upper tank body 10 is a hollow cone. A feeding port is provided on the top of the upper tank body 10 and a sealed tank door 18 is installed at the feeding port. A water vapor feeding pipe is fixedly installed on the top of the sealed tank door 18. A valve is arranged in the water vapor feeding pipe. The conical bottom end of the upper tank body 10 is fixedly connected to the top of the exhaust tank 11. The bottom of the exhaust tank 11 is fixedly connected to the curved top wall of the fermentation tank 12. The bottom of the fermentation tank 12 is in a conical downward state. A second electromagnetic valve 22 is fixedly installed on the conical bottom of the fermentation tank 12. Arc-shaped connecting pipes 13 bent upward are fixedly connected to the outer walls of both sides of the fermentation tank 12. There are two groups of filter tanks 14 and crushing tanks 16. Each group of filter tanks 14 is fixedly connected to the top of the connecting pipe 13 on the corresponding side, and a third solenoid valve 24 is fixedly installed on the inner wall above the cavity of each connecting pipe 13. An extrusion tube 15 is fixedly installed on the top of each group of filter tanks 14, and the other end of the extrusion tube 15 is fixedly connected to the crushing tank 16 in an inclined state. The two groups of crushing tanks 16 are fixedly passed through the two side walls of the upper tank body 10 respectively, and the two groups of crushing tanks 16 are extended into the cavity of the upper tank body 10. The through connection between the crushing tank 16 and the wall of the upper tank body 10 is in a sealed state. One end of the two groups of crushing tanks 16 located in the cavity of the upper tank body 10 is fixedly connected together and the fixed connection end forms a ring. The top of the fixed connection end of the two groups of crushing tanks 16 is fixedly connected with a feed hopper 17. The feed hopper 17 is trumpet-shaped and fixedly connected to the feeding port at the top of the upper tank body 10.

[0047] During use, the sealed tank door 18 is opened, and natural plant materials are placed into the feed hopper 17 through the feeding port. Natural plant materials include but are not limited to vegetable leaves with high moisture content, banana stems, and other plants. For larger vegetable leaves and stems, they need to be pre-cut and processed first. The pre-cutting process requires the removal of mud and impurities. After pre-processing, they are processed into slightly smaller blocks or stems, and then put into the feed hopper 17. When a batch of materials is put into the feed hopper 17, the sealed tank door 18 is closed, and the water vapor feed pipe is connected to the air pump.

[0048] like Figure 2 、 Figure 3 、 Figure 7 and Figure 8As shown, the cavities of the two groups of crushing tanks 16 are each provided with a multi-stage crushing assembly for crushing the material, and the multi-stage crushing assembly includes a crushing column 34 located at the center position of the cavity of the crushing tank 16, and a hood 31 is installed in the cavity of the fixed connecting end of the two groups of crushing tanks 16 through a bracket, a first servo motor 30 is fixedly installed in the hood 31, and a first bevel gear 32 is fixedly installed on the output end of the first servo motor 30 through a shaft coupling, the crushing column 34 is rotatably mounted together with one side outer wall of the hood 31 through a bearing, and a second bevel gear 33 is fixed on one end of the crushing column 34 located in the cavity of the hood 31, and the second bevel gear 33 is meshed with the first bevel gear 32.

[0049] like Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 、 Figure 11 、 Figure 12 and Figure 13As shown, multiple groups of cutting units are provided on the outer wall of the crushing column 34, and multi-stage crushing processing is achieved when the material passes through the multiple groups of cutting units; the cutting unit includes a crushing ring body 37, a connecting rod 36, a crushing rod 38, a crushing blade 39 and a fixed sleeve 35, the crushing ring body 37 is an annular body, and the upper and lower end walls of the crushing ring body 37 are tapered surfaces with gradually decreasing thickness, the number of connecting rods 36 is multiple and the multiple connecting rods 36 are respectively fixedly installed between the crushing ring body 37 and the fixed sleeve 35, the fixed sleeve 35 and the crushing column 34 are fixedly installed together by bolts, the crushing rod 38 is movably arranged at the middle position of each connecting rod 36 and the crushing rod 38 passes through the connecting rod 36, and the crushing blade 39 is fixedly installed on the wall surface of each crushing rod 38; the crushing blade 39 along the center line direction of the crushing rod 38 is in a state of gradually decreasing and then gradually increasing length, and the crushing blades 39 on both sides of the crushing rod 38 are in a symmetrical state; a limited swing groove 40 is provided at the center position of the connecting rod 36 to limit A limiting rod 41 is fixedly installed at the center of the limiting swing groove 40, and the limiting rod 41 is rotatably connected to the limiting swing groove 40. Protective leather covers 42 are fixedly inserted into the outer walls of the crushing rods 38 on both sides of the limiting swing groove 40. The protective leather covers 42 are arc-shaped, and a slide 43 is provided on the inner wall above the side of the connecting rod 36 away from the crushing column 34. The slide 43 is connected to the limiting swing groove 40. A first spring 44 is fixedly installed on the inner wall of the cavity of the slide 43. The other end of the first spring 44 A counterweight 45 is fixedly connected to the end, and the counterweight 45 is slidably connected to the slide 43. A stop ring 47 is fixedly provided on the inner wall of the slide 43 near the limit swing groove 40. A wire hole is opened in the center of the stop ring 47, and an annular rubber sleeve is fixed on the inner wall of the guide hole. A steel wire rope 46 is fixed on one end of the counterweight 45 near the stop ring 47, and the other end of the steel wire rope 46 is fixedly connected to the upper side wall of the crushing rod 38 in the cavity of the limit swing groove 40 after passing through the rubber sleeve.

[0050] Turn on the working switch of the first servo motor 30, the first servo motor 30 drives the first bevel gear 32 to rotate, the first bevel gear 32 drives the second bevel gear 33 to rotate, the first servo motor 30 is a forward and reverse rotation motor, when the second bevel gear 33 is working, the second bevel gear 33 drives the crushing column 34 to rotate, when the crushing column 34 works and rotates, it drives the connecting rod 36 and the crushing ring body 37 to rotate through the fixed sleeve 35, and cooperates with the water vapor feed pipe to continuously inject airflow and air. Under the blowing of air, the air and airflow will carry the material downward, and the material will pass through the feed hopper 17 after It can fall down freely and fall down along the inner wall of the crushing tank 16. The rotating crushing ring 37 drives the crushing rod 38 and the crushing blade 39 to rotate through the connecting rod 36, and the fallen material can be crushed and cut. The crushed and cut materials by the crushing ring 37 and the crushing blade 39 will continue to fall down. Through multiple groups of cutting units, it is possible to fully crush the materials in each crushing tank 16. During the crushing process, the juice produced after the plant is cut will also flow down along the inner wall of the crushing tank 16. The continuous airflow can also accelerate the flow of the juice.

[0051] It is worth noting that the speed of the first servo motor 30 can be adjusted and controlled. When the speed of the first servo motor 30 is increased, the centrifugal force increases, causing the counterweight 45 to slide along the inner wall of the slide 43 to the side away from the crushing column 34, causing the first spring 44 to be compressed. At this time, the moving counterweight 45 pulls the crushing rod 38 to one side through the wire rope 46. After being pulled, the crushing rod 38 is in a tilted state. When multiple groups of crushing rods 38 are in a tilted state, the contact efficiency between the crushing blade 39 and the passing material can be improved, so that the material can be further fully crushed, thereby improving the crushing efficiency of the plant material. The protective leather cover 42 is provided to prevent the material from entering the limit swing groove 40. Even if the crushing rod 38 is tilted to a certain extent, the diameter of the protective leather cover 42 is larger than the limit swing groove 40. The protective leather cover 42 can also shield the limit swing groove 40 to prevent the material from entering the limit swing groove 40 and causing the limit swing groove 40 to be blocked.

[0052] like Figure 2 、 Figure 6 、 Figure 15 、 Figure 16 、 Figure 17As shown, a pressing assembly for intermittently pressing the material downward is provided between each group of crushing tanks 16 and the corresponding extrusion tube 15. The pressing assembly is arranged together with the crushing column 34. The pressing assembly includes a threaded drive rod 51. A threaded groove 50 is provided in the bottom wall of the crushing column 34. One end of the threaded drive rod 51 is threadedly connected to the threaded drive rod 51. A baffle plate 52 for assisting in material discharge and guiding is fixedly installed on the inner wall of the upper side of one end of the crushing tank 16 close to the extrusion tube 15. The baffle plate 52 is in a tilted downward state. The threaded drive rod 51 moves through the baffle plate 52. The outer wall of the bottom of the crushing column 34 is fixed with a baffle plate 52 for assisting in material discharge and guiding. A limiting and stabilizing sleeve is rotatably installed on each of them. The limiting and stabilizing sleeve is annular. The bottom outer wall of the crushing column 34 is installed together with the limiting and stabilizing sleeve through a sleeve bearing. The bottom outer wall of the crushing column 34 is fixedly connected to the inner wall of the bearing. The limiting and stabilizing sleeve is fixed to the upper inner wall of the crushing tank 16 through a bracket. The bottom end of the threaded drive rod 51 is fixedly connected to a rectangular fixing rod 53. A rectangular limiting sliding sleeve 54 is sleeved on the outer wall of the fixing rod 53. The fixing rod 53 passes through the limiting sliding sleeve 54, and the limiting sliding sleeve 54 is fixed to the upper inner wall of the crushing tank 16 through a bracket. A squeezing block 55 is movably provided in the cavity of the squeezing tube 15, and a mounting plate 56 is fixedly installed on the upper inner wall of the crushing tank 16. A plurality of first telescopic rods 57 are fixedly installed between the bottom of the mounting plate 56 and the top of the squeezing block 55. A return spring is sleeved on the outer wall of each first telescopic rod 57, and the two ends of the return spring are respectively fixedly connected to the wall of the mounting plate 56 and the squeezing block 55. The squeezing block 55 is provided with an inclined squeezing avoidance surface 68 near the lower inner wall of the cavity of the crushing tank 16. The thickness of the squeezing block 55 near the lower inner wall of the cavity of the crushing tank 16 is the smallest. A first filter plate 58 is fixedly installed on the lower inner wall of the cavity of the squeezing tube 15, and the first filter plate 58 is parallel to the squeezing avoidance surface 68. The squeezing block 55 is close to the lower inner wall of the cavity of the crushing tank 16 for an inclined slope (specifically as Figure 6 and Figure 15 As shown), an elastic material blocking net 69 is fixedly installed between the smallest thickness end of the pressing block 55 and the material blocking plate 52.

[0053] Furthermore, after the above-mentioned continuous cutting and crushing of the material, the crushed material moves further downward under the combined action of gravity and airflow, and the juice also flows down along the inner wall of the crushing tank 16. When the crushing column 34 is in the process of continuous rotation, the threaded drive rod 51 is threadedly connected to the thread groove 50 of the crushing column 34. The pitch of the external thread of the threaded drive rod 51 and the thread groove 50 can be designed to be smaller. In this way, even if the crushing column 34 is in a continuous rotation, the extension speed of the threaded drive rod 51 will be in a slow state. The limiting sleeve 54 limits and guides the fixed rod 53. In this way, when the crushing column 34 rotates, the threaded drive rod 51 will drive the fixed rod 53 to move downward in an inclined manner. The bottom of the fixed rod 53 can be provided with a rubber protrusion. When the fixed rod 53 moves downward in an inclined manner, the fixed rod 53 The squeezing block 55 can be pressed downward, and the material blocks and juice falling down along the crushing tank 16 will enter the squeezing tube 15. The baffle plate 52 also plays the role of guiding the material, and part of the juice will slide down through the baffle plate 52. A squeezing avoidance surface 68 is provided at the bottom of the squeezing block 55 to facilitate the unloading and guiding of the material. After the material is guided by the baffle plate 52, the material and juice will basically go along the inner wall bottom surface of the crushing tank 16. The squeezing block 55 forms an open shape on one side close to the inner bottom surface of the crushing tank 16, which facilitates the material and juice to enter the squeezing tube 15. When the fixing rod 53 is not When the pressing block 55 is in contact, under normal circumstances, the pressing block 55 will have an upward movement tendency under the pulling force of the return spring, so that the opening can be opened, and the material and juice enter the squeezing tube 15. When the fixing rod 53 presses the pressing block 55 downward, the pressing block 55 moves downward, and the pressing block 55 gradually reduces the opening between the pressing block 55 and the inner wall of the crushing tank 16. When the pressing block 55 enters the squeezing tube 15, the opening is completely closed. The pressing block 55 moves downward again, and the pressing block 55 squeezes the material and juice falling on the first filter plate 58. When squeezing the material and juice, the liquid in the material is further squeezed. The juice gradually falls down through the first filter plate 58, and the juice also gradually flows downward. It is worth noting that after the pressing block 55 enters the extrusion tube 15, the pressing block 55 will also pull the material blocking net 69 to extend downward. The function of the material blocking net 69 is to stop the material at this time, and stop the material in the space formed by the material blocking plate 52, the material blocking net 69 and the inner wall of the crushing tank 16 to prevent the material from falling onto the slope of the pressing block 55. Because the slope is inclined, even if the juice falls onto the pressing block 55 at this time, after the pressing block 55 gradually resets, the juice will fall again through the top slope of the pressing block 55, mainly to stop the material.

[0054] Furthermore, by timing the forward and reverse operation of the first servo motor 30, when the squeezing block 55 has completed squeezing the material to extract juice, the first servo motor 30 performs reverse operation, causing the fixed rod 53 to gradually withdraw its pressure on the squeezing block 55. Under the action of the return spring, the return spring pulls the squeezing block 55 downward, gradually opening the opening between the squeezing block 55 and the crushing tank 16. After opening, the previously accumulated material will continue to fall downward, and the juice will also flow downward. It is worth noting that the forward and reverse operation of the first servo motor 30 will not affect the cutting of the material. As long as the material enters the crushing tank 16, it will be crushed and cut regardless of which direction the cutting is rotated.

[0055] like Figure 2 、 Figure 14 As shown, the cavity of each filter tank 14 is provided with multiple groups of filter assemblies capable of intermittent reciprocating shaking. The filter assemblies cooperate with the squeezing block 55 in the cavity of the extrusion tube 15 and include a second filter plate 63. The second filter plate 63 is a truncated cone with a hollow bottom. An annular filter plate 64 is fixedly connected to the outer wall of the annular bottom of the second filter plate 63. The annular filter plate 64 is slidably connected to the inner wall of the cavity of the filter tank 14. Multiple groups of second telescopic rods 66 are fixedly connected between two adjacent annular filter plates 64. A second spring 65 is inserted into the outer wall of each second telescopic rod 66. The upper and lower ends of the second spring 65 are respectively fixedly connected to the wall surface of the annular filter plate 64 on the corresponding side. A second telescopic rod 66 and a second spring 65 are also installed between the uppermost annular filter plate 64 and the top wall of the cavity of the filter tank 14. A vertically downward linkage rod 59 is fixedly installed on the pressing avoidance surface 68. The linkage rod 59 always movably penetrates the first filter plate 58 and extends into the cavity of the filter tank 14. The bottom end of the linkage rod 59 corresponds to the position of the second filter plate 63 on the uppermost side of the cavity of the filter tank 14. A guide groove 67 with a gradually decreasing inner diameter is provided on the bottom wall of the cavity of each filter tank 14. The bottom end of the guide groove 67 corresponds to the top position of the connecting pipe 13 and the two are sealed and fixedly connected; a plurality of groups of temperature-adjustable heaters are also fixedly installed in the conical bottom wall of the fermentation tank 12. It is worth noting that a box door (not shown in the figure) can be set on the side wall of the filter tank 14, and the box door can be installed and closed with the filter tank 14 by means of a rubber gasket seal, which can facilitate the cleaning and maintenance of the second filter plate 63 in the later stage. Similarly, a side door (not shown in the figure) can be set on the side wall of the extrusion tube 15 away from the exhaust tank 11 in the same way, and the side door can also be installed and closed with the extrusion tube 15 by means of a rubber gasket seal, which can also facilitate the cleaning, maintenance or replacement of the first filter plate 58 in the later stage.

[0056] During use, the juice is coarsely filtered through the first filter plate 58 by pressing and squeezing the continuously crushed material. The coarsely filtered juice then falls into the cavity of the filter tank 14 and is filtered again by the multiple sets of second filter plates 63 and annular filter plates 64. The multiple sets of second filter plates 63 in the cavity of each filter tank 14 have filter holes that gradually decrease from top to bottom. This is to avoid a large amount of filter residue or slurry in the coarsely filtered juice. If concentrated filtration is carried out, it is easy to cause the upper second filter plate 63 and the annular filter plate 64 to be blocked. By gradually reducing the diameter of the filter holes, the filtration pressure of the upper second filter plate 63 and the annular filter plate 64 can be reduced, and the filtrate can also be filtered more efficiently.

[0057] Furthermore, when the pressing block 55 moves downward, the pressing block 55 will drive the linkage rod 59 to move downward synchronously. The linkage rod 59 is always in a state of penetrating the first filter plate 58. This is to prevent the linkage rod 59 and the first filter plate 58 from being in a hollow state when the pressing block 55 moves upward under the tension of the return spring, thereby preventing material slag from falling through this place. When the linkage rod 59 is driven downward, the linkage rod 59 enters the cavity of the filter tank 14, and the bottom end of the linkage rod 59 presses against the second filter plate 63 on the uppermost side. When pressed, the uppermost fixed rod 53 will move downward. Then, the second filter plate 63 on the lower side will also move downward under the action of the second spring 65 and the second telescopic rod 66, and finally, the multiple second filter plates 63 in the cavity of each filter tank 14 will move downward. When the pressing block 55 is reset, under the elastic force of the second spring 65, the multiple groups of second springs 65 in the cavity of the filter tank 14 are in a state of slow shaking. Because the force of the second spring 65 is gradually stable, the slow shaking of the multiple groups of second filter plates 63 can appropriately speed up the filtration of the juice falling above. In the process of shaking, the flow of juice can be accelerated. At the same time, appropriate shaking can also prevent the problem of juice gathering together and easily causing blockage.

[0058] Finally, the filtered juice is collected through the guide groove 67 . After the collection, the working switch of the third electromagnetic valve 24 is opened, and the juice flows into the fermentation tank 12 along the connecting pipe 13 .

[0059] like Figure 1 、 Figure 2 and Figure 18As shown, an exhaust valve 19 is fixedly installed on one side of the top of the upper tank body 10, a first electromagnetic valve 20 is fixedly installed on the upper inner wall of the exhaust tank 11, a feeding pipe 23 is fixedly installed on the lower outer wall of one side of the exhaust tank 11, and an insulation layer 21 is fixedly installed on the outer walls of the upper tank body 10, the exhaust tank 11, the fermentation tank 12 and the connecting pipe 13. A second servo motor 60 is fixedly installed on the lower inner wall of the exhaust tank 11 through a bracket. The output end of the second servo motor 60 is fixedly connected to a stirring rod 61 extending into the fermentation tank 12 through a shaft coupling. A plurality of groups of stirring fan plates 62 are fixedly installed on the outer wall of the stirring rod 61. The stirring fan plates 62 are triangular in shape. The second servo motor 60 is located above the feeding pipe 23.

[0060] Specifically, after the juice completely enters the fermentation tank 12, a certain amount of dissolved brown sugar water is added through the feeding pipe 23. After the brown sugar water is fully dissolved, it needs to be cooled to below 30°C of the first servo motor to avoid high temperature destroying the activity of lactic acid bacteria. A certain amount of plant lactobacillus can also be added to the fermentation tank 12 cavity through the feeding pipe 23. Under the action of brown sugar and plant lactobacillus, the plant juice promotes the reproduction of lactic acid bacteria as a carbon source, and the addition of plant lactobacillus can improve the efficiency of lactic acid production.

[0061] It is worth noting that during the liquid fermentation stage, the third electromagnetic valve 24, the feeding pipe 23, and the second electromagnetic valve 22 need to be closed, and the first electromagnetic valve 20 needs to be opened. Regular exhaust is performed through the exhaust valve 19. When exhaust is required, the first electromagnetic valve 20 is opened, and after exhaust, the first electromagnetic valve 20 is closed again. During liquid fermentation, the working switch of the second servo motor 60 can be turned on. The timed operation of the second servo motor 60 can drive the stirring fan plate 62 to rotate through the stirring rod 61, and the stirring fan plate 62 stirs the liquid fermented fertilizer in the fermentation tank 12. Regular stirring can appropriately accelerate fermentation and also prevent the formation of precipitation. Appropriate stirring and mixing can also be performed during the addition of brown sugar water and Lactobacillus plantarum. It is worth noting that by installing an adjustable temperature heater on the conical bottom wall of the fermentation tank 12, the heating temperature can be appropriately selected, for example, during the startup period (0-24 hours): 30-32°C to promote rapid reproduction of lactic acid bacteria; during the metabolic period (24-48 hours): 25-28°C to inhibit the growth of miscellaneous bacteria and increase lactic acid production. In addition, in order to cooperate with the operation of the heater, it is also necessary to install a thermometer on the inner wall of the fermentation tank 12, and control the operation of the heater according to the specific upper and lower temperature limit signals. When heating and temperature control are required, the insulation layer 21 plays a role in heat preservation. In addition, in the specific liquid fertilizer production process, it may be necessary to control and adjust the pH value of the liquid in the fermentation tank 12. When the pH drops too slowly or does not drop, the dominant bacterial flora can be enhanced by further adding lactic acid bacteria inoculant or by supplementing brown sugar water. When the pH is too low, it can also be adjusted by adding calcium hydroxide or calcium carbonate in small amounts multiple times. Because the present technical solution is mainly to produce naturally fermented liquid fertilizer, chemical adjustment is avoided as much as possible. Priority can be given to maintaining the pH value through sealing, sugar content, and inoculation amount to ensure the "additive-free" characteristics of the product. The above-mentioned heater, thermometer, and insulation layer 21 are all existing technologies and will not be described in detail here.

[0062] Finally, when the liquid fertilizer is completely fermented, the working switch of the second electromagnetic valve 22 is opened to discharge the liquid fertilizer. The discharged liquid fertilizer is a natural green liquid fertilizer. After the liquid fertilizer is completely discharged, when cleaning the overall equipment of the present technical solution, the water vapor feed pipe is connected to the water pump, the first servo motor 30, the second servo motor 60, the connecting pipe 13 and the switch of the second electromagnetic valve 22 are turned on, and high-pressure water is continuously sprayed into the crushing tank 16. The water flow will flush the equipment in the crushing tank 16. After flushing, the water will flow down along the crushing tank 16, and will generally clean the second filter plate 63 in the filter tank 14 and the inner wall of the fermentation tank 12. In this way, the overall equipment can be maintained after use, which is convenient for next use.

[0063] It will be understood that the present invention is described by way of some embodiments, and it will be appreciated by those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.

Claims

1. A liquid fertilizer production device, characterized in that: The invention comprises an upper tank body (10), an exhaust tank (11), a fermentation tank (12), a filter tank (14) and a crushing tank (16), wherein the upper tank body (10) is a hollow cone, a feeding port is provided on the top of the upper tank body (10) and a sealed tank door (18) is installed at the feeding port, the conical bottom end of the upper tank body (10) is fixedly connected to the top end of the exhaust tank (11), the bottom of the exhaust tank (11) is fixedly connected to the arc-shaped top wall of the fermentation tank (12), the bottom of the fermentation tank (12) is in a conical downward state, a second electromagnetic valve (22) is fixedly installed on the conical bottom of the fermentation tank (12), arc-shaped connecting pipes (13) bent upward are fixedly connected on the outer walls of both sides of the fermentation tank (12), the number of the filter tank (14) and the crushing tank (16) are both two groups, each group of the filter tank (14) is fixedly connected to the top end of the connecting pipe (13) on the corresponding side, and each group of the filter tank (14) is fixedly connected to the top end of the connecting pipe (13) on the corresponding side. A third electromagnetic valve (24) is fixedly installed on the inner wall above the cavity of each connecting pipe (13), and an extrusion tube (15) is fixedly installed on the top of each group of filter tanks (14). The other end of the extrusion tube (15) is fixedly connected to the crushing tank (16) in an inclined state. The two groups of crushing tanks (16) are fixedly penetrated through the two side walls of the upper tank body (10) and the two groups of crushing tanks (16) are inserted into the cavity of the upper tank body (10). The through connection between the crushing tank (16) and the wall of the upper tank body (10) is in a sealed state. One end of the two groups of crushing tanks (16) located in the cavity of the upper tank body (10) is fixedly connected together and the fixed connection end forms a ring. The top of the fixed connection end of the two groups of crushing tanks (16) is fixedly connected to a feed hopper (17). The feed hopper (17) is trumpet-shaped and is fixedly connected to the feeding port at the top of the upper tank body (10); The cavities of the two groups of crushing tanks (16) are both provided with a multi-stage crushing assembly for crushing the material. The multi-stage crushing assembly includes a crushing column (34) located at the center of the cavity of the crushing tank (16). The outer wall of the crushing column (34) is provided with multiple groups of cutting units. When the material passes through the multiple groups of cutting units, a multi-stage crushing process is achieved. A pressing assembly for intermittently pressing the material downward is provided between each group of crushing tanks (16) and the corresponding extrusion tube (15), and the pressing assembly is provided together with the crushing column (34); A plurality of filter components capable of intermittent reciprocating shaking are arranged in the cavity of each filter tank (14).

2. The liquid fertilizer production device according to claim 1, characterized in that: A housing (31) is installed in the cavity of the fixed connection end of the two groups of crushing tanks (16) through a bracket, a first servo motor (30) is fixedly installed in the housing (31), a first bevel gear (32) is fixedly installed on the output end of the first servo motor (30) through a shaft coupling, a crushing column (34) and an outer wall of one side of the housing (31) are rotatably installed together through a bearing, a second bevel gear (33) is fixed on one end of the crushing column (34) located in the cavity of the housing (31), and the second bevel gear (33) is meshed with the first bevel gear (32); the cutting unit includes a crushing ring body (37), a connecting rod (36), a crushing rod (38), a crushing blade (39) and a fixed sleeve (35), the crushing ring body (37) is an annular body, the upper and lower end walls of the crushing ring body (37) are tapered surfaces with gradually decreasing thickness, the number of connecting rods (36) is multiple and the multiple connecting rods (36) are respectively fixedly installed between the crushing ring body (37) and the fixed sleeve (35), the fixed sleeve (35) and the crushing column (34) are fixedly installed together by bolts, the crushing rod (38) is movably arranged at the middle position of each connecting rod (36) and the crushing rod (38) passes through the connecting rod (36), and the crushing blade (39) is fixedly installed on the wall surface of each crushing rod (38).

3. The liquid fertilizer production device according to claim 2, characterized in that: The crushing blades (39) along the center line direction of the crushing rod (38) are in a state of gradually decreasing and then gradually increasing length, and the crushing blades (39) on both sides of the crushing rod (38) are in a symmetrical state; a limited swing groove (40) is provided at the center position of the connecting rod (36), a limited rod (41) is fixedly installed at the center position of the limited swing groove (40), the limited rod (41) is rotatably connected to the limited swing groove (40), and protective leather covers (42) are fixedly inserted on the outer walls of the crushing rods (38) on both sides of the limited swing groove (40), and the protective leather covers (42) are arc-shaped. A slideway (43) is provided on the inner wall above the side of the connecting rod (36) away from the crushing column (34), and the slideway (43) is connected to the limit swing groove (40). The slideway (43) is connected to the position-limiting swing groove (40), and a first spring (44) is fixedly installed on the inner wall of the cavity of the slideway (43). The other end of the first spring (44) is fixedly connected to a counterweight (45). The counterweight (45) is slidably connected to the slideway (43). A stop ring (47) is fixedly provided on the inner wall of one side of the slideway (43) close to the position-limiting swing groove (40). A wire hole is opened at the center of the stop ring (47). An annular rubber sleeve is fixedly provided on the inner wall of the guide hole. A steel wire rope (46) is fixedly provided on one end of the counterweight (45) close to the stop ring (47). The other end of the steel wire rope (46) is fixedly connected to the upper side wall of the crushing rod (38) located in the cavity of the position-limiting swing groove (40).

4. The liquid fertilizer production device according to claim 3, characterized in that: The squeezing assembly includes a threaded driving rod (51), a threaded groove (50) is provided in the bottom wall of the crushing column (34), one end of the threaded driving rod (51) is threadedly connected to the threaded driving rod (51), and a baffle plate (52) for assisting in material feeding and guiding is fixedly installed on the inner wall of the upper side of one end of the crushing tank (16) close to the extrusion tube (15), the baffle plate (52) is in a tilted downward state, and the threaded driving rod (51) movably passes through the baffle plate (52), and a limiting and stabilizing sleeve is rotatably installed on the outer wall of the bottom of the crushing column (34), and the limiting and stabilizing sleeve is annular. The bottom outer wall of the crushing column (34) is installed together with the limiting and stabilizing sleeve through the sleeve bearing, the bottom outer wall of the crushing column (34) is fixedly connected to the inner wall of the bearing, the limiting and stabilizing sleeve and the upper inner wall of the crushing tank (16) are fixedly installed together through the bracket, the bottom end of the threaded driving rod (51) is fixedly connected with a rectangular fixing rod (53), the outer wall of the fixing rod (53) is sleeved with a rectangular limiting sliding sleeve (54), the fixing rod (53) movably passes through the limiting sliding sleeve (54), and the limiting sliding sleeve (54) and the upper inner wall of the crushing tank (16) are fixedly installed together through the bracket.

5. The liquid fertilizer production device according to claim 4, characterized in that: A squeezing block (55) is movably provided in the cavity of the squeezing tube (15), a mounting plate (56) is fixedly installed on the upper inner wall of the crushing tank (16), and a plurality of first telescopic rods (57) are fixedly installed between the bottom of the mounting plate (56) and the top of the squeezing block (55), and a return spring is inserted into the outer wall of each first telescopic rod (57), and the two ends of the return spring are respectively fixedly connected to the mounting plate (56) and the wall of the squeezing block (55), and the squeezing block (55) is provided with an inclined inner wall near the lower inner wall of the cavity of the crushing tank (16). The pressing avoidance surface (68) is in a state, the thickness of the pressing block (55) near the lower inner wall of the crushing tank (16) is the smallest, a first filter plate (58) is fixedly installed on the lower inner wall of the cavity of the extrusion tube (15), the first filter plate (58) and the pressing avoidance surface (68) are in a state of being vertically parallel, the top of the pressing block (55) is also a slope, the pressing block (55) near the lower inner wall of the cavity of the crushing tank (16) is an inclined slope, and an elastic material blocking net (69) is fixedly installed between the end with the smallest thickness of the pressing block (55) and the material blocking plate (52).

6. The liquid fertilizer production device according to claim 5, characterized in that: The filter assembly cooperates with the squeezing block (55) in the cavity of the extrusion tube (15), and the filter assembly includes a second filter plate (63). The second filter plate (63) is a truncated cone with a hollow bottom. An annular ring filter plate (64) is fixedly connected to the outer wall of the annular bottom of the second filter plate (63). The annular filter plate (64) is slidably connected to the inner wall of the cavity of the filter tank (14). Multiple groups of second telescopic rods (66) are fixedly connected between the two adjacent annular filter plates (64) above and below. A second spring (65) is inserted into the outer wall of each second telescopic rod (66). The upper and lower ends of the second spring (65) are respectively fixedly connected to the wall surface of the annular filter plate (64) on the corresponding side. A second telescopic rod (66) and a second spring (65) are also installed between the annular filter plate (64) located on the uppermost side and the top wall surface of the cavity of the filter tank (14).

7. The liquid fertilizer production device according to claim 6, characterized in that: A linkage rod (59) is fixedly installed on the pressing avoidance surface (68), and the linkage rod (59) always movably penetrates the first filter plate (58). The linkage rod (59) extends into the cavity of the filter tank (14). The bottom end of the linkage rod (59) corresponds to the position of the second filter plate (63) on the upper side of the cavity of the filter tank (14). A guide groove (67) with a gradually decreasing inner diameter is opened on the bottom wall of the cavity of each filter tank (14). The bottom end of the guide groove (67) corresponds to the top position of the connecting pipe (13) and the two are sealed and fixedly connected. A plurality of groups of temperature-adjustable heaters are also fixedly installed in the conical bottom wall of the fermentation tank (12).

8. The liquid fertilizer production device according to claim 1, characterized in that: An exhaust valve (19) is fixedly installed on one side of the top of the upper tank body (10), a first electromagnetic valve (20) is fixedly installed on the upper inner wall of the exhaust tank (11), a feeding pipe (23) is fixedly installed on the lower outer wall of one side of the exhaust tank (11), and an insulation layer (21) is fixedly installed on the outer walls of the upper tank body (10), the exhaust tank (11), the fermentation tank (12) and the connecting pipe (13).

9. The liquid fertilizer production device according to claim 8, characterized in that: A second servo motor (60) is fixedly mounted on the inner wall of the lower cavity of the exhaust tank (11) through a bracket. The output end of the second servo motor (60) is fixedly connected to a stirring rod (61) extending into the cavity of the fermentation tank (12) through a shaft coupling. A plurality of groups of stirring fan plates (62) are fixedly mounted on the outer wall of the stirring rod (61). The stirring fan plates (62) are triangular in shape. The second servo motor (60) is located above the feeding pipe (23).

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