Continuous screening device for soil microbial strains

Abstract

The invention relates to a soil microbial strain continuous screening device which comprises a filtering assembly and a screening assembly, the filtering assembly comprises a filtering tank, a filtering hopper used for filtering soil impurities is arranged in the filtering tank, and a rotary conveying mechanism is arranged below the filtering hopper and used for conveying soil at the bottom of an inner cavity of the filtering tank to the position below the filtering hopper again. The rotary conveying mechanism comprises a hollow pipe connected to the bottom of the filtering hopper, a spiral shaft is arranged in the hollow pipe, a driving mechanism is connected to the top end of the spiral shaft, a dispersing mechanism located in the filtering hopper is arranged on the spiral shaft and used for pulverizing soil, and the screening assembly comprises a screening box arranged at the bottom end of the filtering tank. A flow guide block and a spraying assembly are connected into the screening box, and the spraying assembly sprays a culture solution to be mixed with soil to assist in screening of microbial strains. The problems that in the prior art, due to the fact that a culture solution adheres to blocky soil and is not prone to dispersion, the screening efficiency, the screening effect and the screening amount are low are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of microbial strain screening, and in particular to a device for continuous screening of soil microbial strains. Background Art

[0002] The soil contains rich and diverse microbial resources, which play a vital role in the material cycle, energy conversion and plant growth promotion of the soil ecosystem. The bacterial species in the soil are microorganisms used as living cell catalysts in the fermentation process, including four major categories: bacteria, actinomycetes, yeasts and molds. Useful bacterial species are separated and screened from the soil and stored for use in the production of microbial agents. The microbial strains screened from the soil can be used in a variety of fields. For example, in agricultural production, microbial strains that promote plant growth and enhance plant resistance (such as drought resistance, cold resistance, disease resistance, etc.) can be screened to develop microbial fertilizers and biological pesticides, reduce the use of chemical fertilizers and pesticides, and achieve green and sustainable development of agriculture. For example, in the field of environmental protection, microbial strains that can degrade organic pollutants (such as petroleum hydrocarbons, pesticide residues, polycyclic aromatic hydrocarbons, etc.) are used to remediate soil and water pollution. These microorganisms metabolize organic pollutants into harmless small molecules, reducing environmental pollutant concentrations and restoring ecological quality. In industrial biotechnology, for example, screening for enzyme-producing microbial strains can be used to produce various industrial enzyme preparations, such as amylase, protease, and cellulase, which are widely used in the food, textile, papermaking, and pharmaceutical industries. Furthermore, screening for microbial strains that produce biofuels (such as ethanol and biodiesel) can provide a new avenue for the development of renewable energy.

[0003] Prior art screening of soil microbial strains often involves adding microbial culture fluid and then centrifuging and stratifying the strains. Examples include a soil microbial strain continuous screening device with publication number CN214612459U and a soil microbial strain continuous screening device with publication number CN111690519A.

[0004] Due to the wide variety of soil types and varying properties found in nature, conventional continuous screening devices for soil microorganisms are often used. When mixing lumps of soil directly with a culture solution, the viscosity of the culture solution causes the lumps to adhere and become difficult to disperse. Even with continuous operation of the stirring mechanism, these lumps remain difficult to completely break up. This not only reduces the mixing efficiency and screening efficiency of the soil and culture solution, but also reduces the amount of microorganisms screened. Therefore, the present invention provides a continuous screening device for soil microorganisms with high screening efficiency and a high screening capacity. Summary of the Invention

[0005] In view of this, the object of the present invention is to provide a continuous screening device for soil microbial strains to solve the problem in the prior art that the culture solution adheres to the bulk soil and is difficult to disperse, resulting in low screening efficiency, screening effect and screening volume.

[0006] The present invention is achieved through the following technical solutions:

[0007] The soil microbial strain continuous screening device includes a filtering component and a screening component. The filtering component includes a filter tank, a filter bucket for filtering soil impurities is provided inside the filter tank, and a rotating conveying mechanism is provided below the filter bucket for re-transporting the soil at the bottom of the inner cavity of the filter tank to the bottom of the filter bucket. The rotating conveying mechanism includes a hollow tube connected to the bottom of the filter bucket, a spiral shaft is provided inside the hollow tube, and a driving mechanism is connected to the top of the spiral shaft. A dispersion mechanism is provided on the spiral shaft located in the filter bucket for crushing the soil. The screening component includes a screening box provided at the bottom end of the filter tank, a guide block and a spray component are connected inside the screening box, and the spray component sprays culture solution and soil to mix to assist in screening microbial strains. The bottom end of the screening box is connected to a centrifugal separation mechanism for separating microbial strains and culture solution.

[0008] Furthermore, a guide bucket is fixedly provided at the top of the hollow tube, the guide bucket is movably sleeved on the spiral shaft, and a gap is formed between the guide bucket and the top of the hollow tube for soil spraying. The top of the guide bucket is detachably connected to the bottom of the filter bucket through at least one connecting rod.

[0009] Furthermore, at least one opening is formed at the bottom of the filter bucket, and a filter screen for filtering impurities in the soil is fixedly provided inside each opening.

[0010] Furthermore, a sealing cover is detachably connected to the top of the filter tank, and the driving mechanism includes a servo motor detachably connected to the top of the sealing cover. The bottom end of the output shaft of the servo motor passes through the bottom end of the sealing cover and is detachably connected to the top of the spiral shaft. A feed port is opened on one side of the top of the sealing cover.

[0011] Furthermore, the dispersion mechanism includes two rolling rods located in the filter bucket, and the two rolling rods are movably connected to the spiral shaft. When the rolling rods rotate with the spiral shaft, the two rolling rods cooperate with the filter screen to disperse the soil, so that the soil is dispersed into fine particles and falls into the filter tank for filtration and drying.

[0012] Furthermore, both sides of the filter tank are connected with air pipes, one of which is connected with an air pump. The bottom end of the air pump is fixed to the top of the screening box away from the filter tank through a bracket. Solenoid valves are fixed on both air pipes. Filter plates are fixed on the inside of both air pipes near the guide bucket to prevent soil from falling into the air pipe, blocking the air pipe and affecting the air circulation.

[0013] Furthermore, a receiving groove is provided at the top of the guide block, an electric push rod is fixed inside the receiving groove, a sealing plug is fixed at the top of the piston rod of the electric push rod, and the sealing plug is located inside the filter tank to prevent soil from automatically flowing into the screening box.

[0014] Furthermore, the spray assembly includes two spray pipes located on one side of the guide block, and multiple spray heads are fixedly passed through the side close to each other of the two spray pipes, and the multiple spray heads are respectively connected to the interior of the two spray pipes. A liquid storage tank is fixedly provided at the rear end of the screening box, and a water pump is fixedly provided inside the liquid storage tank. The water pump is connected to the two spray pipes through a hose. When the soil flows downward from the guide block, the soil passes between the two spray pipes and is fully contacted and mixed with the culture solution sprayed from the spray head.

[0015] Furthermore, the centrifugal separation mechanism includes a separation box detachably connected to the bottom of the screening box, a centrifugal separation bucket is provided inside the separation box, the bottom of the centrifugal separation bucket is connected to a servo motor 2, the servo motor 2 is detachably installed at the bottom of the separation box, and two scrapers are fixedly provided on the output shaft of the servo motor 2, and the two scrapers are located between the bottom of the centrifugal separation bucket and the inner wall of the bottom of the separation box. Discharge ports are provided on both sides of the bottom of the separation box, and sealing plates are hinged at the bottom of the two discharge ports. When the sealing plates are opened, the separated microbial strains can flow out from the discharge ports, which is convenient for the staff to collect.

[0016] Furthermore, support legs are fixedly provided on both sides of the screening box, and the two support legs are distributed on both sides of the separation box to make the entire device more stable during use.

[0017] The beneficial effects of the present invention are:

[0018] 1. This soil microbial strain continuous screening device adopts a design that matches the filter bucket with the spiral shaft. It can not only screen the soil into fine particles and remove impurities, but also make the soil in the filter tank continuously circulate upward. Combined with the air circulation in the filter tank, it helps to further improve the soil dispersion and make the soil and culture solution mix more fully, thereby effectively improving the screening effect, screening amount and screening efficiency of soil microbial strains.

[0019] 2. The spiral shaft drives the two rollers to rotate in the filter bucket while transporting the soil. The rotating rollers can crush the lumpy soil, making the soil more granular and improving the subsequent mixing effect with the culture solution. The rollers can also push the soil to prevent the filter from being blocked, thereby improving the soil filtration efficiency.

[0020] 3. Use the guide block to guide the soil to automatically flow into the centrifugal separation bucket. When the soil passes between the two spray pipes, the multiple spray heads on the two spray pipes continuously spray the culture solution to fully mix it with the flowing soil, thereby achieving continuous mixing treatment of the soil, which can not only improve the screening effect of soil microbial strains, but also improve the screening efficiency;

[0021] 4. Use servo motor 2 to drive the centrifugal separation bucket to rotate and generate centrifugal force to separate microbial strains. At the same time, servo motor 2 can also drive the two scrapers to rotate together. With the help of the scrapers, the scattered microbial strains can be pushed to the discharge port, thereby speeding up the discharge speed of the microbial strains.

[0022] Other advantages, objects, and features of the present invention will be described in part in the following description and, in part, will be apparent to those skilled in the art upon examination of the following description or may be learned from practice of the present invention. The objects and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0024] Figure 2 It is a side view of the overall structure of the present invention;

[0025] Figure 3 A cross-sectional view of the collection box and riser in the present invention;

[0026] Figure 4 A cross-sectional view of the filter tank and screening box of the present invention;

[0027] Figure 5 It is a top view of the overall structure of the present invention;

[0028] Figure 6 It is a cross-sectional view of the filter tank in the present invention;

[0029] Figure 7 It is a cross-sectional view of the screening box in the present invention;

[0030] Figure 8 This is a main cross-sectional view of the screening box and guide block in the present invention;

[0031] Figure 9 This is a main cross-sectional view of the guide block in the present invention;

[0032] Figure 10 This is a top view of the filter bucket in the present invention;

[0033] Figure 11 It is a cross-sectional view of the separation box in the present invention;

[0034] Figure 12 for Figure 11 main view.

[0035] In the figure: 1. Filter assembly; 11. Filter tank; 12. Filter bucket; 121. Opening; 122. Filter screen; 13. Rotary conveying mechanism; 131. Hollow tube; 132. Screw shaft; 133. Driving mechanism; 134. Dispersing mechanism; 1341. Rolling rod; 135. Diversion bucket; 136. Connecting rod;

[0036] 2. Screening assembly; 21. Screening box; 22. Guide block; 221. Storage tank; 222. Electric push rod; 223. Sealing plug; 23. Spraying assembly; 231. Spraying pipe; 232. Spraying head; 233. Liquid storage tank; 234. Water pump;

[0037] 24. Centrifugal separation mechanism; 241. Separation box; 242. Centrifugal separation bucket; 243. Servo motor 2; 244. Scraper; 245. Feeding port; 246. Sealing plate;

[0038] 3. Sealing cover; 4. Feed port; 5. Air pipe; 6. Air pump; 7. Solenoid valve; 8. Filter plate; 9. Support legs. DETAILED DESCRIPTION

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0041] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0042] In the above description of the present invention, it should be noted that the terms "one side," "the other side," and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and simplify the description, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and the like are used solely for distinction and should not be construed as indicating or implying relative importance.

[0043] Furthermore, the term "identical" and similar terms do not necessarily require that the components be absolutely identical; slight variations are permitted. The term "perpendicular" simply refers to the positional relationship between components being more perpendicular than "parallel," not that the structure must be perfectly vertical; rather, it can be slightly tilted.

[0044] See also Figure 1-10 The present invention provides a technical solution: a continuous screening device for soil microbial strains, including a filtering component 1 and a screening component 2, the filtering component 1 includes a filtering tank 11, a filtering bucket 12 for filtering soil impurities is provided inside the filtering tank 11, the bottom end of the filtering bucket 12 is processed with at least one opening 121, and a filter screen 122 for filtering impurities in the soil is fixedly provided inside each opening 121, a rotating conveying mechanism 13 is provided below the filtering bucket 12, for re-transporting the soil at the bottom of the inner cavity of the filtering tank 11 to the bottom of the filtering bucket 12, the rotating conveying mechanism 13 includes a hollow tube 131 connected to the bottom of the filtering bucket 12, a spiral shaft 132 is provided inside the hollow tube 131, and a driving mechanism 133 is connected to the top of the spiral shaft 132.

[0045] Next, a diversion bucket 135 is fixed at the top of the hollow tube 131. The diversion bucket 135 is movably mounted on the spiral shaft 132, and a gap is formed between the diversion bucket 135 and the top of the hollow tube 131 for soil ejection. The top of the diversion bucket 135 is detachably connected to the bottom of the filter bucket 12 through at least one connecting rod 136.

[0046] The top of the filter tank 11 is also detachably connected to a sealing cover 3 by a plurality of bolts. The driving mechanism 133 includes a servo motor 1 detachably connected to the top of the sealing cover 3. The servo motor 1 is a Lihao servo motor lh180 series with a power of 3.0kw-15kw. It is an auxiliary motor indirect speed change device, which can accurately control parameters such as speed, position and torque, and can convert the input electrical signal into angular displacement or angular velocity output on the shaft. Therefore, with the help of the servo motor 1, there is sufficient power to drive the spiral shaft 132 to rotate. The bottom end of the output shaft of the servo motor 1 passes through the bottom end of the sealing cover 3 and is detachably connected to the top of the spiral shaft 132. A feed port 4 is provided on one side of the top of the sealing cover 3 for closing the feed port 4.

[0047] like Figure 1-6 As shown, then, air pipes 5 are connected on both sides of the filter tank 11, and one of the air pipes 5 is connected to an air pump 6. The air pump 6 is XYZ-1000, which is high-performance and multi-functional. It adopts advanced compression technology, has high exhaust pressure and flow, can meet the needs of industrial production, and can also realize gas injection, inflation and other functions by replacing accessories. The use of the air pump 6 can maintain air circulation inside the filter tank 11, so as to facilitate better drying of the soil. The bottom end of the air pump 6 is fixed to the top of the screening box 21 away from the filter tank 11 through a bracket. A solenoid valve 7 is fixed on the two air pipes 5. The solenoid valve 7 is 2V025-08 model solenoid valve from Elico with a diameter of 8mm. It can be used for one-way normally open and close control of gas. The voltage is optional including DC24V, DC12V, AC220V, etc. Its structure is simple and can be used for a simple gas on-off control circuit. A filter plate 8 is fixed on the side of the two air pipes 5 near the guide bucket 135 to prevent soil from falling into the air pipe 5.

[0048] In actual use, the soil falls into the filter bucket 12 in the filter tank 11 through the feed port 4 on the sealing cover 3. The soil is filtered by the multiple filter screens 122 on the filter bucket 12 and falls to the bottom of the inner cavity of the filter tank 11. The impurities in the soil remain above the filter screen 122. At the same time, the fine structure of the filter screen 122 will also disperse the originally large soil clumps into many small particles, which lays a good foundation for the subsequent processing process. Then, the control machine starts the servo motor to drive the screw shaft 132 to rotate. The screw shaft 132 cooperates with the hollow tube 131 to move the soil at the bottom of the inner cavity of the filter tank 11. The soil is transported back to the bottom of the filter bucket 12, and at the same time, the air pump 6 is also running synchronously. The air pump 6 continuously transports gas to the air pipe 5 connected to it. The gas flows along the air pipe 5 to the filter tank 11, and then flows out from another air pipe 5. In this way, the ventilation and drying operation inside the filter tank 11 is realized. A ventilated and dry environment is essential for soil treatment. It can allow the soil to be better dispersed into particles under suitable conditions. This ideal soil state is very convenient for subsequent mixing with the culture solution, which can significantly improve the screening effect of microbial strains.

[0049] This embodiment adopts a design in which the filter bucket 12 and the spiral shaft 132 are matched, which can not only screen the soil into fine particles and remove impurities therein, but also allow the soil in the filter tank 11 to continuously circulate upward, and cooperate with the air circulation in the filter tank 11 to further improve the soil dispersion, so that the soil and culture solution are mixed more fully, thereby effectively improving the screening effect, screening amount and screening efficiency of soil microbial strains.

[0050] like Figure 4 、 Figure 6 and Figure 10As shown, in order to make the soil more dispersed, a dispersion mechanism 134 located in the filter bucket 12 is provided on the spiral shaft 132 for crushing the soil. Specifically, the dispersion mechanism 134 includes two grinding rods 1341 located in the filter bucket 12, and the two grinding rods 1341 are movably connected to the spiral shaft 132.

[0051] In this embodiment, when the rolling rods 1341 rotate along with the screw shaft 132, the rolling rods 1341 have a certain roughness (such as Figure 10 As shown), the friction between the soil and the rolling rod 1341 is increased, and the rolling rod 1341 repeatedly turns and squeezes the soil entering the working area of ​​the filter bucket 12. In this process, the original block structure of the soil is gradually destroyed, and under the multiple effects of friction, squeezing force and the movement trajectory of the rolling rod 1341, the soil is gradually dispersed into extremely fine particles. Then, under the action of gravity, these fine particles pass through the mesh of the filter screen 122 and fall into the filter tank 11 below. The fine particles can fully contact with the gas and dry.

[0052] like Figure 1-4 and Figure 7-9 As shown, the screening component 2 includes a screening box 21 arranged at the bottom end of the filter tank 11, and a guide block 22 and a spray component 23 are connected to the inside of the screening box 21. The spray component 23 sprays the culture solution and soil to assist in screening the microbial strains. The bottom end of the screening box 21 is connected to a centrifugal separation mechanism 24 for separating the microbial strains and the culture solution. Support legs 9 are fixed on both sides of the screening box 21. The two support legs 9 are distributed on both sides of the separation box 241, and a controller for controlling the operation of the electrical equipment of the device is fixed at the bottom end of the screening box 21. The controller is ABB 3BHE005789R0001, which is a relay module type electrical control device responsible for performing complex logic control tasks and controlling the operation and stop of the electrical equipment according to input signals or instructions.

[0053] Next, a receiving groove 221 is opened at the top of the guide block 22, and an electric push rod 222 is fixed inside the receiving groove 221. A sealing plug 223 is fixed at the top of the piston rod of the electric push rod 222. The sealing plug 223 is located inside the filter tank 11 to prevent soil from automatically flowing into the screening box 21.

[0054] In this embodiment, the electric push rod 222 uses the aluminum IPT1100ZL series, such as IPT1100ZL-100mm, and adopts a DC motor with voltages of 12V, 24V, etc., which can be used for lifting, pushing, pulling and other actions of small industrial equipment. This model of electric push rod 222 is used to drive the sealing plug 223 to lift and lower. Since the lifting distance of the sealing plug 223 is short, this model of electric push rod 222 is more suitable.

[0055] In this embodiment, Figure 4 、 Figure 8 and Figure 9 As shown, the spray assembly 23 includes two spray pipes 231 located on one side of the guide block 22, and multiple spray heads 232 are fixedly passed through the side close to each other of the two spray pipes 231, and the multiple spray heads 232 are respectively connected to the interior of the two spray pipes 231. A liquid storage tank 233 is fixedly provided at the rear end of the screening box 21, and a water pump 234 is fixedly provided inside the liquid storage tank 233. The water pump 234 is connected to the two spray pipes 231 through a hose, and can automatically deliver culture fluid with sufficient pressure.

[0056] In this embodiment, the water pump 234 uses an IQ type single-stage single-suction centrifugal pump with a diameter of 50-200 mm, a flow rate of 12.5-400 cubic meters / hour, a head of 8-125 meters, and a speed of 1450-2900 rpm. Therefore, the use of this model of water pump 234 can stably transport the culture solution, making it convenient for multiple spray heads 232 to evenly spray the culture solution onto the soil.

[0057] After the soil in the filter tank 11 has been dried for a period of time, the electric push rod 222 electrically connected to the control machine receives a command signal, and the electric push rod 222 contracts to drive the sealing plug 223 to move rapidly downward along a preset vertical downward path to the receiving groove 221 of the guide block 22, so that the bottom opening of the filter tank 11, which was originally sealed, is smoothly opened, and the dried soil in the filter tank 11 can automatically fall into the screening box 21 through the opened opening. Figure 7As shown), when the soil flows out of the filter tank 11 and flows through the guide groove on the guide block 22 to the lower right side of the screening box 21, it will pass through the specific area between the two spray pipes 231. The soil will pass between the two spray pipes 231, and the control machine will immediately start the water pump 234 to stably and efficiently suck the culture solution from the liquid storage tank 233, and continuously transport the culture solution to the two spray pipes 231, so that the multiple spray heads 232 can continuously and evenly spray out fine culture solution droplets, which are fully and efficiently mixed with the flowing soil particles. This continuous mixing treatment mode not only creates an ideal initial environment for the growth and reproduction of soil microbial strains, greatly improves the screening effect of soil microbial strains, but also significantly shortens the overall processing time through automated and continuous operation processes, greatly improves the screening efficiency, and at the same time, the spraying method can save the amount of culture solution and avoid waste of culture solution.

[0058] like Figure 1-4 、 Figure 7-8 and Figure 11-12 As shown, the centrifugal separation mechanism 24 includes a separation box 241 detachably connected to the bottom end of the screening box 21. A centrifugal separation bucket 242 is provided inside the separation box 241. A servo motor 243 is connected to the bottom end of the centrifugal separation bucket 242. The servo motor 243 is the same as the servo motor 1 described above. The Lihao servo motor LH180 series can also be selected, with a power of 3.0 kW to 15 kW. The servo motor 243 is detachably mounted on the bottom end of the separation box 241. Discharge ports 245 are provided on both sides of the bottom end of the separation box 241. The bottoms of the two discharge ports 245 are hinged with sealing plates 246.

[0059] After the soil flowing downward in the screening box 21 is mixed with the culture solution, due to the action of gravity, this mixed soil follows the flow path and falls directly into the centrifugal separation bucket 242 below. At the same time, the servo motor 243 mechanically connected to the centrifugal separation bucket 242 responds quickly after receiving the start-up command from the control machine. The servo motor 243 is equipped with a high-precision encoder and an advanced closed-loop control system, which can accurately control key parameters such as speed and torque, so that the centrifugal separation bucket 242 can be driven to rotate at high speed to generate centrifugal force. Under the action of centrifugation, the microbial strains in the soil can be separated. When the separation process continues to reach the preset time node, the control machine issues an instruction again, so that the speed of the centrifugal separation bucket 242 gradually decreases until it stops steadily. The separated microbial strains slowly and orderly flow out from the two discharge ports 245 at the bottom of the separation box 241, making it convenient for the staff to collect the microbial strains.

[0060] In this embodiment, two scrapers 244 are fixedly provided on the output shaft of the servo motor 243. The two scrapers 244 are located between the bottom of the centrifugal separation bucket 242 and the bottom inner wall of the separation box 241. When the servo motor 243 drives the centrifugal separation bucket 242 to rotate, the two scrapers 244 also rotate accordingly, and can push the microbial strains that fall on the bottom inner wall of the separation box 241 to the discharge port 245, thereby improving the discharge efficiency.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A device for continuous screening of soil microbial strains, characterized by: The invention comprises a filter assembly (1) and a screening assembly (2), wherein the filter assembly (1) comprises a filter tank (11), wherein a filter bucket (12) for filtering soil impurities is provided inside the filter tank (11), and a rotary conveying mechanism (13) is provided below the filter bucket (12) for conveying soil at the bottom of the inner cavity of the filter tank (11) back to the bottom of the filter bucket (12); The rotary conveying mechanism (13) comprises a hollow tube (131) connected to the bottom of the filter hopper (12); a spiral shaft (132) is provided inside the hollow tube (131); a driving mechanism (133) is connected to the top of the spiral shaft (132); and a dispersing mechanism (134) located inside the filter hopper (12) is provided on the spiral shaft (132) for crushing soil. The screening assembly (2) comprises a screening box (21) arranged at the bottom end of the filter tank (11); a guide block (22) and a spray assembly (23) are connected to the inside of the screening box (21); the spray assembly (23) sprays a culture solution mixed with soil to assist in screening microbial strains; the bottom end of the screening box (21) is connected to a centrifugal separation mechanism (24) for separating the microbial strains from the culture solution.

2. The soil microbial strain continuous screening device according to claim 1, characterized in that: A guide hopper (135) is fixedly provided at the top end of the hollow tube (131). The guide hopper (135) is movably sleeved on the spiral shaft (132). A gap is formed between the guide hopper (135) and the top end of the hollow tube (131) for soil ejection. The top end of the guide hopper (135) is detachably connected to the bottom end of the filter hopper (12) via at least one connecting rod (136).

3. The soil microbial strain continuous screening device according to claim 1, characterized in that: The bottom end of the filter bucket (12) is processed with at least one opening (121), and a filter screen (122) for filtering impurities in the soil is fixedly provided inside each opening (121).

4. The soil microbial strain continuous screening device according to claim 1, characterized in that: The top of the filter tank (11) is detachably connected to a sealing cover (3), and the driving mechanism (133) includes a servo motor 1 detachably connected to the top of the sealing cover (3). The bottom end of the output shaft of the servo motor 1 passes through the bottom end of the sealing cover (3) and is detachably connected to the top end of the spiral shaft (132). A feed port (4) is provided on one side of the top of the sealing cover (3).

5. The soil microbial strain continuous screening device according to claim 1, characterized in that: The dispersion mechanism (134) includes two rolling rods (1341) located in the filter bucket (12), and the two rolling rods (1341) are movably connected to the spiral shaft (132); When the rolling rods (1341) rotate along with the spiral shaft (132), the two rolling rods (1341) cooperate with the filter screen (122) to disperse the soil, so that the soil is dispersed into fine particles and falls into the filter tank (11) for filtration and drying.

6. The soil microbial strain continuous screening device according to claim 2, characterized in that: Both sides of the filter tank (11) are connected to air pipes (5), one of the air pipes (5) is connected to an air pump (6), the bottom end of the air pump (6) is fixed to the top of the screening box (21) away from the filter tank (11) through a bracket, and a solenoid valve (7) is fixed on both air pipes (5). A filter plate (8) is fixed on the inside of both air pipes (5) near the guide bucket (135) to prevent soil from falling into the air pipe (5).

7. The soil microbial strain continuous screening device according to claim 1, characterized in that: A receiving groove (221) is provided at the top of the guide block (22), an electric push rod (222) is fixedly provided inside the receiving groove (221), a sealing plug (223) is fixedly provided at the top of the piston rod of the electric push rod (222), and the sealing plug (223) is located inside the filter tank (11) and is used to prevent soil from automatically flowing into the screening box (21).

8. The soil microbial strain continuous screening device according to claim 1, characterized in that: The spray assembly (23) comprises two spray pipes (231) located on one side of the guide block (22); a plurality of spray heads (232) are fixedly passed through the adjacent sides of the two spray pipes (231); and the plurality of spray heads (232) are respectively connected to the interiors of the two spray pipes (231); a liquid storage tank (233) is fixedly provided at the rear end of the screening box (21); a water pump (234) is fixedly provided inside the liquid storage tank (233); and the water pump (234) is connected to the two spray pipes (231) through a hose; When the soil flows downward from the guide block (22), the soil passes between the two spray pipes (231) and is fully contacted and mixed with the culture solution sprayed from the spray head (232).

9. The soil microbial strain continuous screening device according to claim 1, characterized in that: The centrifugal separation mechanism (24) comprises a separation box (241) detachably connected to the bottom end of the screening box (21); a centrifugal separation bucket (242) is provided inside the separation box (241); a servo motor 2 (243) is connected to the bottom end of the centrifugal separation bucket (242); the servo motor 2 (243) is detachably mounted on the bottom end of the separation box (241); two scrapers (244) are fixedly provided on the output shaft of the servo motor 2 (243); the two scrapers (244) are both located between the bottom end of the centrifugal separation bucket (242) and the inner wall of the bottom end of the separation box (241); discharge ports (245) are provided on both sides of the bottom end of the separation box (241); and sealing plates (246) are hinged to the bottoms of the two discharge ports (245).

10. The soil microbial strain continuous screening device according to claim 9, characterized in that: Support legs (9) are fixedly provided on both sides of the screening box (21), and the two support legs (9) are distributed on both sides of the separation box (241).

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