Opposite spiral stirring soil flora culture experiment device

Abstract

The utility model belongs to the technical field of spiral stirring devices, and particularly relates to an opposite spiral stirring soil flora culture experiment device. According to an existing cylindrical barrel-shaped single-screw stirring device, due to the fact that the stirring action is simple, soil moves along with the stirring device in a blocky shape, the interior of the blocky soil cannot be stirred, meanwhile, the soil adheres to the wall of a cylindrical barrel and the bottom of a container, and the effect that water evenly diffuses in the soil during water injection cannot be achieved; according to the experimental device, through the design that the rotating direction of the central spiral blade rod is opposite to that of the outer-ring spiral belt, the stirring assembly can rotate and stir around the central shaft and also has the upward thrust of the central spiral blade rod and the downward pressure of the outer-ring spiral belt, so that all layers of soil are uniformly mixed; therefore, water or air introduced into the soil is uniformly distributed in the soil, the flora scale is enlarged, and the flora decomposition efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of spiral stirring devices. Background Art

[0002] Plastic products such as plastic bags have greatly facilitated our daily lives and industrial production, but some plastics are landfilled in the soil after being discarded, causing environmental pollution problems such as difficulty in degradation and long degradation time. They can also lead to a decrease in soil fertility, seriously endangering the environment on which we depend for survival.

[0003] Cultivating special bacterial communities is a feasible solution to this problem. Bacteria with decomposition characteristics break the plastic macromolecule chains into small molecules, and after engulfing and metabolizing, decompose them into carbon dioxide, water, and organic matter. In order to study this type of special bacterial community that can quickly degrade plastics in the soil, it is necessary to manufacture a soil bacterial community cultivation experimental device, expand the bacterial community size by artificially controlling parameters such as soil temperature and humidity, and thus improve the decomposition efficiency of the bacterial community. This requires that the water and air introduced into the soil be evenly distributed inside the soil. Currently, stirring the soil is mostly used to achieve the above purpose.

[0004] The existing cylindrical barrel-shaped single-screw stirring device has a simple stirring action, and the soil often moves in lumps with the stirring device, and the large lumps of soil cannot be stirred. At the same time, the soil will adhere to the cylindrical barrel wall and the bottom of the container. It can only achieve horizontal plane stirring and cannot mix the soil layers evenly. Since the center is a single-screw structure, a hollow appears around the screw, and water injection cannot achieve a large range of spraying, so it takes a long time for water injection to diffuse evenly in the soil.

[0005] Although uniform mixing can be achieved to a certain extent by applying vibration to the single-screw mixing device or adding multiple screws, it cannot solve the problem that the layers of soil cannot be mixed, and the manufacturing cost is high. Summary of the invention

[0006] In order to fully stir the soil so that the water can be evenly diffused inside it, thereby improving the decomposition efficiency of the bacterial community and completing the control and detection of humidity, the utility model patent application proposes a "counter-spiral stirring soil bacterial community cultivation experimental device".

[0007] like Figures 1 to 5As shown, the experimental device includes a barrel cover 1 and a barrel body 5. The barrel body is divided into an upper barrel 51, a middle barrel 52, and a lower barrel 53. The barrel cover 1 covers the top of the upper barrel 51, and an air outlet 101 and a water inlet 102 are provided on the surface. A motor 2 is fixed on the barrel cover, and a water injection device 3 is installed at a position opposite to the water inlet 102; it also includes a stirring assembly, which is composed of a motor 2, a coupling 4 and a stirring component. The stirring component includes a central spiral blade rod 61, two outer ring spiral belts 62 and a cross bar 63. The spiral trajectory of the outer ring spiral belt is a variable diameter spiral line, and the spiral line radius gradually changes from large at the top to small at the bottom. The starting points and two end points of the two outer ring spiral belts are 180° apart from each other; the starting point of an outer ring spiral belt and the cross bar 63 are connected. The end points are 180° to 360° apart, wherein the spiral blades of the central spiral blade rod and the outer spiral belt rotate in opposite directions; the cross bars 63 are fixed on the rod shaft of the central spiral blade rod, and 3 to 5 of them are evenly distributed, the starting points of the two outer spiral belts are connected to the two ends of one cross bar, the end points of the two outer spiral belts are connected to the two ends of another cross bar, and the two ends of the remaining 1 to 3 cross bars are respectively connected from the starting points of the two outer spiral belts to a certain part of the end point; the power output shaft of the motor passes through the barrel cover 1 and is connected to the upper end of the central spiral blade rod through the coupling 4; an air intake device 7 is provided at the lower end of the stirring assembly, and a humidity sensor 8 is fixed to the inner wall of the middle barrel, and the data is transmitted to the electronic screen 9 for display.

[0008] Technical effect: When the motor is started, the device is designed with opposite rotation directions of the central spiral blade rod and the outer spiral belt, so that the stirring component has both rotation stirring around the central axis and the upward thrust of the central spiral blade rod and the downward pressure of the outer spiral belt, so that the soil can be evenly mixed between layers; when rotating clockwise, the outer spiral belt transports the soil downward, and finally the upper soil falls to the center to fill the possible hollow phenomenon; the soil is cut horizontally by the outer spiral belt and the cross bar to prevent large pieces of soil from rotating as a whole and being unable to be stirred inside; at the same time, the outer spiral belt also has a wall scraping effect, and the water injection device can also clean the inner wall of the barrel to a certain extent, so that the soil adhering to the inner wall of the barrel can also be stirred evenly.

[0009] When using:

[0010] 1. Open the lid 1, and Figure 4 In the state of , add the mixture of soil and plastic until it covers the humidity sensor 8, cover the bucket cover, and connect the air inlet valve and the water inlet valve to the air inlet and the water inlet 102 respectively through threads. The valve adopts a quick-insert connector for easy installation and removal.

[0011] 2. Start the motor when water or gas is introduced. Only one motor is needed to rotate in one direction to complete the multi-directional mixing of the soil. The cost is low. Under normal working conditions, the motor rotates clockwise when viewed from above, but it can also rotate in the opposite direction to achieve more uniform mixing. At the same time, during the mixing process, the barrel remains stationary, which is convenient for wiring and improves safety performance.

[0012] 3. The humidity measured by the humidity sensor is displayed on the electronic screen 9 to facilitate humidity control at any time. After the soil is evenly stirred, the device is placed in an incubator. The carbon dioxide concentration and other parameters can be measured through the air outlet 101 to analyze the decomposition efficiency of the bacterial flora. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall external structure of this experimental device.

[0014] Figure 2 Schematic diagram of the experimental device without the internal structure of the barrel.

[0015] Figure 3 This is an exploded view of the experimental device and serves as an abstract attachment.

[0016] Figure 4 Schematic diagram of the experimental device when adding a mixture of soil and plastic.

[0017] Figure 5 for Figure 1 Cross-sectional view along A-A'.

[0018] Figure 6 This is a schematic diagram of the water injection device structure of this experimental device.

[0019] Figure 7 This is a schematic diagram of the air intake device structure of this experimental device. DETAILED DESCRIPTION

[0020] The counter-rotating spiral stirring soil flora culture experimental device comprises a barrel cover 1 and a barrel body 5, wherein an upper barrel 51 is used to connect the barrel cover 1 and the middle barrel 52, and serves as a transition cavity to isolate and prevent soil from blocking the water injection device 3.

[0021] The barrel cover 1 is covered on the upper barrel 51 and screwed upward through the threaded holes to support and fix the motor 2. An air outlet 101 and a water inlet 102 are provided on the surface. A bearing 12 is fixed to the lower end of the barrel cover 1. The bearing enables smooth rotation of the stirring assembly.

[0022] A water injection device 3 is installed at a position opposite to the water inlet 102, such as Figure 6 As shown, the fire-fighting water-spreading rack structure allows the pressurized water column to splash under the resistance of the flower-shaped baffle 31, so that the injected water flow is dispersed on the soil surface and has a certain wall washing effect.

[0023] It also includes a stirring assembly, which consists of a motor 2, a coupling 4 and a stirring component. The stirring component includes a central spiral blade rod 61, two outer spiral belts 62 and a cross bar 63. The three parts cooperate with each other to achieve mixing of the soil in the Z-axis direction; the shape of the cross bar can be a cylindrical strip with a circular cross section, or a flat strip with a rectangular cross section. The power output shaft of the motor 2 passes through the barrel cover 1 and the bearing 12 and is connected to the upper end of the central spiral blade rod 61 through the coupling 4.

[0024] The lower end of the stirring assembly is provided with an air intake device 7, including an air intake valve 71 and a bottom sieve plate 72. Figure 7 As shown, the bottom sieve plate 72 is hollow inside, and through the filtering effect of the small circular holes on the surface, only a small amount of soil is contained in the hollow area to prevent the soil from blocking the air inlet. The regular distribution of the small circular holes on the bottom sieve plate also makes the gas enter more evenly. The air inlet is located on the side wall of the bottom sieve plate 72, and is connected to the air inlet valve 71 through threads. The external interface of the air inlet valve 71 is surrounded by a rubber ring, so that the air inlet pipe with tangential fine teeth on the inner ring can be engaged with the air inlet, which is convenient for disassembly and assembly.

[0025] Four humidity sensors 8 are fixed to the inner wall of the middle barrel 52. Figure 4 As shown, the humidity sensor 8 is fixed by screws through the protrusions of the inner wall. The four sensors are of equal height and evenly distributed along the barrel wall, so as to achieve uniform detection in the horizontal direction and weighting, and finally obtain the humidity in the barrel. Experiments show that after the water is evenly diffused in the soil, there is almost no difference in the humidity of the upper soil and the lower soil. Therefore, the humidity of the soil in the entire barrel can be represented by the detection of the upper soil, and the humidity data can be transmitted to the electronic screen 9 for display.

[0026] The lower barrel 53 can be a conical cylinder wall as a whole, or a cylindrical outer wall can be added around the conical cylinder wall, and the two can form an insulation chamber. The insulation chamber includes insulation material and heating resistance wire. A temperature sensor can be fixed on the outer surface of the conical cylinder wall and connected to the electronic screen 9.

[0027] The thickness of the outer spiral belt 62 can be reduced while ensuring the strength of the stirring component, so as to reduce the pressure exerted by the outer spiral belt 62 on the bottom.

[0028] The barrel cover and the upper barrel, the upper barrel and the middle barrel, and the middle barrel and the lower barrel can be connected by coupled protruding buckles or by threads.

Claims

1. A soil flora culture experimental device with counter-rotating spiral stirring, comprising a barrel cover (1) and a barrel body (5), characterized in that: The barrel body is divided into an upper barrel (51), a middle barrel (52) and a lower barrel (53). The barrel cover (1) covers the top of the upper barrel (51) and is provided with an air outlet (101) and a water inlet (102) on the surface. A motor (2) is fixed on the barrel cover and a water injection device (3) is installed at a position opposite to the water inlet (102). The barrel body also includes a stirring assembly, which is composed of a motor (2), a coupling (4) and a stirring component. The stirring component includes a central spiral blade rod (61), two outer spiral belts (62) and a cross bar (63). The spiral trajectory of the outer spiral belt is a variable diameter spiral line, and the spiral line radius gradually changes from large at the top to small at the bottom. The starting points and two end points of the two outer spiral belts are 180 degrees apart, and the starting point and end point of a certain outer spiral belt are 180 degrees apart. The angle of rotation of the central spiral blade rod (61) is 180° to 360°, wherein the spiral blade of the central spiral blade rod and the outer spiral belt have opposite rotation directions; the cross bars (63) are fixed on the rod shaft of the central spiral blade rod, and 3 to 5 of them are evenly distributed, the starting points of the two outer spiral belts are connected to the two ends of one cross bar, the end points of the two outer spiral belts are connected to the two ends of another cross bar, and the two ends of the remaining 1 to 3 cross bars are respectively connected to a certain position from the starting point to the end point of the two outer spiral belts; the power output shaft of the motor (2) passes through the barrel cover and is connected to the upper end of the central spiral blade rod through the coupling (4); the lower end of the stirring assembly is provided with an air intake device (7), and the inner wall of the middle barrel (52) is fixed with a humidity sensor (8), and the data is transmitted to the electronic screen (9) for display.

2. The counter-rotating spiral stirring soil flora culture experimental device according to claim 1, characterized in that: The water injection device (3) is a fire-fighting type water dispersion rack structure, and a flower-shaped baffle (31) is provided at the bottom.

3. The counter-rotating spiral stirring soil flora culture experimental device according to claim 1, characterized in that: The air intake device (7) comprises an air intake valve (71) and a bottom sieve plate (72).

4. The counter-rotating spiral stirring soil flora culture experimental device according to claim 1, characterized in that: The number of the humidity sensors (8) is 4, which are of equal height and evenly distributed along the barrel wall, so as to achieve uniform detection in the horizontal direction and perform weighting.

5. The counter-rotating spiral stirring soil flora culture experimental device according to claim 1, characterized in that: The lower barrel (53) is a conical barrel wall.

6. The counter-rotating spiral stirring soil flora culture experimental device according to claim 1, characterized in that: The lower barrel (53) is a conical barrel wall surrounded by a cylindrical outer wall, and the two form a heat-insulating chamber. The heat-insulating chamber includes a heat-insulating material and a heating resistance wire. A temperature sensor is fixed on the outer surface of the conical barrel wall and is connected to the electronic screen (9).

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