A medium nutrient detection device

Abstract

This invention relates to the field of fungal cultivation, and more particularly to a nutrient detection device for a culture medium. The nutrient detection device includes a frame, a screening device mounted on the frame, and a detection module located downstream of the screening device. The screening device includes a vibrating screen for loading material, and a support base. The support base has a passage structure for the material falling from the vibrating screen to pass through, and rolling elements are also provided on the support base to support the vibrating screen. Because the vibrating screen has a large weight after being filled with material, a support base is also provided to support the vibrating screen. By incorporating rolling elements, the device can both support the vibrating screen and reduce the friction between the vibrating screen and the support base through rolling, thereby solving the problem in the prior art where the weight of the screening cylinder and the material is entirely supported by the moving mechanism on the side of the screening cylinder, resulting in a heavy burden on the moving mechanism.

Description

Technical Field

[0001] This invention relates to the field of fungal culture, and more particularly to a nutrient detection device for culture media. Background Technology

[0002] As an emerging industry, the edible fungi industry is playing an increasingly important role in my country's agricultural and rural economic development. The nutrients in the edible fungi cultivation medium are crucial for the growth and development of edible fungi, directly affecting their yield and quality. Fertilization is necessary during the cultivation process, and the amount of fertilization depends on the existing fertility of the culture medium. Therefore, for precise control, it is essential to analyze the nutrient composition of the existing culture medium before fertilization.

[0003] Traditional nutrient analysis primarily relies on chemical reagents, involving the reaction of specific reagents with culture media to obtain the nutrients in different parts of the medium. This method is costly, complex, and environmentally polluting. Increasingly, infrared spectroscopy analysis is being used in existing technologies. For example, Chinese invention patent CN107884358B discloses a portable soil nutrient detection device. This device includes a pulverizing mechanism and a drying mechanism downstream of the pulverizing mechanism. Downstream of the drying mechanism is a photoacoustic cell for detecting soil nutrients. The photoacoustic cell analyzes the soil through a spectral acquisition module and a spectral analysis module to obtain the nutrient composition of the soil.

[0004] Although the above technical solution also sets filter screen holes on the support plate, soil particles rely on gravity to pass through the filter screen holes, and the support plate is fixed. Therefore, soil particles are easily stuck at the filter screen holes. When filtering, only soil particles located directly above or around the filter screen holes can pass through the filter screen holes and enter the downstream for analysis, which cannot allow more soil particles to pass through and affects the accuracy of detection.

[0005] For screening devices, existing technologies include vibrating screens. For example, Chinese utility model patent CN218890819U discloses a vibrating screen for multi-stage screening of mushroom culture medium. This vibrating screen has multiple screen boxes (i.e., screening cylinders), and the side walls of the screening cylinders are connected to a motion mechanism that drives the screening cylinders to reciprocate. The screening cylinders move with the motion mechanism. However, in the above-mentioned vibrating screen, the weight of the screening cylinders is entirely supported by the motion mechanism. The motion mechanism has to support the screening cylinders while simultaneously driving them to move, resulting in a large load on the motion mechanism. Summary of the Invention

[0006] The purpose of this invention is to provide a culture medium nutrient detection device to solve the problem in the prior art where the weight of the screening cylinder and the material is entirely supported by the moving mechanism on the side of the screening cylinder during screening, resulting in a heavy burden on the moving mechanism.

[0007] To achieve the above objectives, the culture medium nutrient detection device of the present invention adopts the following technical solution:

[0008] A culture medium nutrient detection device includes a frame, a screening device mounted on the frame, and a detection module located downstream of the screening device. The screening device and the detection module are arranged vertically. The screening device includes a vibrating screen for filling materials and a support base mounted below the vibrating screen. The support base is provided with a passage structure for materials falling from the vibrating screen to pass through. The support base is also provided with rolling elements for supporting the vibrating screen during its reciprocating movement.

[0009] The beneficial effects of the above technical solution are as follows: This invention improves existing culture medium nutrient detection equipment by setting up a vibrating screen to facilitate the vibration of materials, making it easier to apply force to the materials and thus facilitating their fall. Since the vibrating screen has a large weight after being filled with materials, a support base is also provided to support it. The passage structure on the support base does not affect the passage effect, and the rolling elements not only support the vibrating screen but also reduce the friction between the screen and the support base through rolling. This solves the problem in existing technologies where the weight of the screening cylinder and the materials is entirely supported by the moving mechanism on the side of the screening cylinder, resulting in a heavy burden on the moving mechanism.

[0010] Furthermore, the support base is provided with clearance holes, and connecting ribs are connected to the hole walls of the clearance holes. The grid formed between the connecting ribs and the hole walls of the clearance holes forms the aforementioned passage structure. The rolling elements are installed between the connecting ribs or between the connecting ribs and the hole walls of the clearance holes.

[0011] The beneficial effects of the above technical solution are: it facilitates the support of the rolling elements, reduces the obstruction of materials by setting connecting ribs, and supports the vibrating screen by setting the rolling elements at the clearance holes, thus avoiding poor support effect of the vibrating screen at the clearance holes.

[0012] Furthermore, the connecting ribs include two parallel connecting ribs and a vertical connecting rib connected vertically between the two parallel connecting ribs. The rolling element is installed between the portion of the parallel connecting rib located between the two vertical connecting ribs and the wall of the clearance hole, or the rolling element is installed between the vertical connecting rib and the wall of the clearance hole. The vibrating screen includes a screening container and a drive structure for driving the screening container to reciprocate. The drive structure includes a rotary power source, which is located below the support base and fixed on the square rib grid formed by the two parallel connecting ribs and the two vertical connecting ribs.

[0013] The advantages of the above technical solution are: simple structure, easy to set up; and the supporting ribs also support the drive structure on the vibrating screen.

[0014] Furthermore, a guide rod is fixed in the middle of the bottom surface of the vibrating screen. The guide rod is coordinated with the support seat for guiding movement and is located above the middle of the two parallel connecting ribs.

[0015] The beneficial effects of the above technical solution are as follows: by setting the guide rod, it is easy to guide and cooperate with the support seat, so that the vibrating screen can only move along a fixed direction during the vibration process of the vibrating screen. The guide rod is located above the middle of the two parallel connecting ribs, which facilitates better support.

[0016] Furthermore, the clearance hole is a circular clearance hole, the guide rod crosses the clearance hole radially, and there are two rolling elements located on both sides of the guide rod. Both rolling elements are cylindrical rollers, and the rotation axes of the two cylindrical rollers are perpendicular to the guide rod and extend radially along the clearance hole.

[0017] The advantages of the above technical solution are: better support effect, more balanced support on both sides of the guide rod, less prone to tipping over when the vibrating screen is working, and larger support area for the vibrating screen by using cylindrical rollers.

[0018] Furthermore, a guide rod is fixed in the middle of the bottom surface of the vibrating screen. The guide rod is coordinated with the support seat for guiding movement, and the rolling elements are symmetrically arranged on both sides of the guide rod.

[0019] The beneficial effects of the above technical solution are: better support effect, making the support on both sides of the guide rod more balanced, and less likely to overturn when the vibrating screen is working.

[0020] Furthermore, the vibrating screen includes a screening container, a drive structure for reciprocating movement of the screening container, and a guide rod located in the middle of the bottom surface of the vibrating screen. The drive structure includes a rotary power source, the output end of which is connected to a rotating wheel. A connecting shaft is eccentrically arranged on the rotating wheel. The guide rod has an insertion hole in the middle for the connecting shaft to be inserted. The insertion hole is an elongated hole, and the extension direction of the insertion hole is perpendicular to the movement direction of the guide rod.

[0021] The beneficial effects of the above technical solution are as follows: by setting a rotating power source, the space for power source arrangement is saved; by setting an eccentric rotating wheel, the connecting shaft can make circular motion; and by cooperating with the long hole on the guide rod, the long hole becomes a linear reciprocating motion.

[0022] Furthermore, the waist-shaped ring in the middle and the rods connected to both sides of the waist-shaped ring, with the inner hole of the waist-shaped ring forming the aforementioned insertion hole.

[0023] The beneficial effects of the above technical solution are: reducing the area of ​​the guide rod and avoiding obstruction of the screen holes on the vibrating screen.

[0024] Furthermore, the vibrating screen of the screening device is provided with a cleaning port on its side wall, and a baffle is inserted into the cleaning port.

[0025] The advantages of the above technical solution are: it facilitates the cleaning of materials inside the vibrating screen after use, making it convenient for the next use. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of Example 1 of the culture medium nutrient detection device of the present invention;

[0027] Figure 2 This is a schematic diagram of the pulverizing device in Example 1 of the culture medium nutrient detection equipment of the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of the mounting plate of the pulverizing device in Example 1 of the culture medium nutrient detection equipment of the present invention;

[0029] Figure 4 This is a schematic diagram of the pulverizing cylinder of the pulverizing device in Example 1 of the culture medium nutrient detection equipment of the present invention;

[0030] Figure 5 This is a cross-sectional view of the pulverizing device in Example 1 of the culture medium nutrient detection equipment of the present invention;

[0031] Figure 6 This is a top view of the screening device in Example 1 of the culture medium nutrient detection equipment of the present invention;

[0032] Figure 7 This is a schematic diagram of the screening device in Example 1 of the culture medium nutrient detection equipment of the present invention (the screening container is hidden);

[0033] Figure 8 This is a schematic diagram of the rotating wheel and power source of the screening device in Example 1 of the culture medium nutrient detection equipment of the present invention;

[0034] Figure 9This is a schematic diagram of the guide rod structure of Example 1 of the culture medium nutrient detection device of the present invention;

[0035] Figure 10 This is a schematic diagram of the nutrient detection mechanism of Example 1 of the culture medium nutrient detection equipment of the present invention.

[0036] In the diagram: 11. Support rod; 12. Monitor mounting bracket; 13. Top plate; 14. Bottom plate; 21. Monitor; 22. Switch; 23. USB port; 24. Vision camera; 31. Crushing cylinder; 311. Stepped structure; 312. Discharge port; 313. Operating door; 32. Crushing motor; 33. Crushing paddle; 34. Sealing plate; 35. Mounting plate; 351. Discharge port; 41. Screening cylinder; 411. Screen hole; 42. Baffle; 43. Cylinder bottom plate; 44. Support plate ; 45. Rotary motor; 451. Rotating wheel; 452. Connecting shaft; 46. Guide rod; 461. Insertion hole; 471. Parallel connecting rib; 472. Vertical connecting rib; 48. Cylindrical roller; 49. Limiting block; 51. Sample receiving module; 52. Nutrient detection mechanism; 521. Photoelectric detection module; 522. Data processing module; 523. Control circuit module; 524. Positioning module; 525. Communication module; 526. Data storage module; 527. Power supply module. Detailed Implementation

[0037] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0038] In Example 1 of the culture medium nutrient detection device of the present invention:

[0039] The culture medium nutrient detection equipment in this embodiment is equipped with a frame, on which a screening device and a detection module are installed. The screening device includes a vibrating screen and a support base located below the vibrating screen. The support base supports the vibrating screen. Since the vibrating screen needs to move relative to the support base, a cylindrical roller is also installed on the support base. The rolling of the cylindrical roller supports the movement of the vibrating screen and reduces friction.

[0040] like Figure 1As shown, the culture medium nutrient detection equipment includes a frame, a pulverizing device mounted on the frame, a screening device for filtering the pulverized culture medium to remove large particles, and a detection module for detecting the culture medium of suitable size that has been screened. The frame includes four vertically arranged support rods 11. Support pads for ground support are provided at the bottom of the support rods 11, a top plate 13 is provided at the top of the support rods 11, and a bottom plate 14 is provided at the bottom of the support rods 11. The pulverizing device, screening device, and detection module are arranged sequentially from top to bottom between the top plate 13 and the bottom plate 14. That is, the culture medium is added to the pulverizing device from the top plate 13, pulverized, and then enters the screening device to filter the pulverized culture medium, allowing culture medium of suitable size to pass through. Finally, the culture medium enters the detection module for detection. In this embodiment, the culture medium is corn cob used for culturing fungi. Of course, in other embodiments, other organic materials such as peanut shells can also be used. Detecting the nutrients in the corn cob provides a scientific basis for the cultivation of crops grown in corn cob.

[0041] like Figure 1 As shown, the top plate 13 has a perforated structure to allow corn cobs to pass through and enter the crushing device. A display mounting bracket 12 is also fixedly installed on the top plate 13, and a display 21 for human-machine interaction with the operator is fixedly installed on the display mounting bracket 12. To facilitate control of various parts of the culture medium nutrient detection equipment, a switch 22 and a USB port 23 are also provided on the display mounting bracket 12. A vision camera 24 is located below the top plate 13, facing the crushing device. The vision camera 24 detects the crushing process, and when it determines that the crushing has reached a certain level, it displays the corresponding information on the display 21 to the operator for further instructions.

[0042] like Figure 2As shown, the crushing device includes a crushing cylinder 31, a crushing paddle 33 disposed inside the crushing cylinder 31, and a mounting plate 35 disposed below the crushing cylinder 31 to support it. The mounting plate 35 has four through holes for a support rod 11 to pass through and be fixed to the support rod 11. The crushing cylinder 31 is disposed above the mounting plate 35, and a power source for driving the crushing paddle 33 is disposed below the mounting plate 35. In this embodiment, the power source is a crushing motor 32, which has a flange surface for mounting on the bottom surface of the mounting plate 35. The output shaft of the crushing motor 32 passes through the mounting plate 35 and the bottom of the crushing cylinder 31 and is fixedly connected to the stirring paddle. Three stirring paddles are provided, arranged in a circular array. As the crushing motor 32 rotates, the stirring paddles also rotate, thereby crushing the corn cobs inside the crushing cylinder 31. To facilitate thorough crushing of the corn cobs inside the crushing cylinder 31, the bottom of the crushing cylinder 31 is flat. An outlet 312 is provided on the bottom for the culture medium to drain from the crushing cylinder 31. A sealing plate 34 is detachably installed at the outlet 312. The sealing plate 34 is used to block the outlet 312 during operation and to open the outlet 312 after crushing. When in the blocked state, the sealing plate 34 is flush with the upper surface of the bottom of the crushing cylinder. Due to the presence of the sealing plate 34, the corn cobs will not protrude from the bottom of the cylinder during crushing. Furthermore, the flushness between the bottom of the cylinder and the sealing plate 34 prevents interference from the stirring paddle. When the sealing plate 34 blocks the outlet 312, corn cobs are less likely to remain there, creating a crushing dead zone.

[0043] like Figure 3 and Figure 4 As shown, a discharge port 351 is provided on the mounting plate 35 at the position corresponding to the discharge port 312. A stepped structure 311 is provided on the side wall of the discharge port 312. The sealing plate 34 is supported on the stepped structure 311. To facilitate the installation of the stepped structure 311, a downwardly extending boss is provided at the bottom of the cylinder at the position corresponding to the discharge port 312. The stepped structure 311 is set on the boss, and the boss forms a thickened part at the bottom of the cylinder. The stepped structure 311 on the thickened part facilitates the installation of the sealing plate 34 and also avoids a reduction in structural strength at this point. The stepped structure 311 has three steps forming a U-shape, with an opening at the side wall of the crushing cylinder 31 to facilitate the insertion of the sealing plate 34. At the same time, for positioning and installation, the boss is accommodated in the discharge port 351, and the two edges of the boss located radially on the crushing cylinder 31 respectively cooperate with the stop of the hole wall of the discharge port 351.

[0044] like Figure 2 and Figure 5As shown, since the crushing device is fixed on the frame, in order to facilitate cleaning after the crushing device is used, the side wall of the crushing cylinder 31 is provided with an operating door 313 that can be opened and closed for personnel to remove materials. The operating door 313 is set corresponding to the discharge port 312. The bottom surface of the operating door 313 is flush with the surface of the bottom of the cylinder. That is to say, when the sealing plate 34 is placed in the discharge port 312, the bottom of the operating door 313 is flush with the upper surface of the sealing plate 34. This can prevent the corn cob from being exposed from here, and also prevent the sealing plate from moving upward and interfering with the stirring paddle, thus preventing danger.

[0045] like Figure 6 and Figure 7 As shown, the screening device includes a vibrating screen for loading corn cobs and a support base located below the vibrating screen. In this embodiment, the support base is a support plate 44, which has four through holes around its perimeter for the support rods 11 to pass through. To facilitate screening by the screening device, the support plate 44 also has a passage structure for the falling corn cobs to pass through. The vibrating screen includes a screening container and a drive structure for driving the screening container to reciprocate. The drive structure includes a rotary power source, which in this embodiment is a rotary motor 45. The screening container is a screening cylinder 41, and the bottom plate 43 of the screening cylinder 41 has an array of screen holes 411 arranged at its bottom. A guide rod 46 is fixed in the middle of the bottom surface of the vibrating screen. The guide rod 46 is guided and moved in conjunction with the support base. The rotary motor 45 is connected to the guide rod 46, driving the guide rod 46 to reciprocate linearly in a predetermined direction, thereby causing the screening cylinder 41 to reciprocate linearly.

[0046] like Figure 7 As shown, during the reciprocating linear motion of the screening cylinder 41, the weight of the screening cylinder 41, combined with the weight of the corn cob, results in a relatively large overall weight. Therefore, a rolling element is also provided on the support base to support the vibrating screen during its reciprocating movement. The support base has a circular clearance hole, and connecting ribs are connected to the hole wall. The grid formed by the connecting ribs and the hole wall of the clearance hole constitutes the aforementioned passage structure. The rolling element is installed between the connecting ribs and the hole wall of the clearance hole. There are four connecting ribs arranged in a "well" shape. Specifically, the connecting ribs include two parallel connecting ribs 471 and a vertical connecting rib 472 perpendicularly connected between the two parallel connecting ribs 471. The rolling element is installed between the portion of the parallel connecting rib 471 located between the two vertical connecting ribs 472 and the hole wall of the clearance hole. The rotary motor 45 is located below the support base and is fixed on the square grid formed by two parallel connecting ribs 471 and two vertical connecting ribs 472. In this embodiment, the grid refers to the rectangular grid formed by the connecting ribs, and the grid exactly covers the center position of the clearance hole.

[0047] The guide rod 46 traverses the clearance hole radially and is located above the middle of the two parallel connecting ribs 471. Two cylindrical rollers 48 are provided as rolling elements, with their rotation axes extending radially along the clearance hole. During the movement of the guide rod 46, the cylindrical rollers 48 are positioned on either side of the guide rod 46, providing greater stability and even force distribution on both sides. The guide rod 46 is supported on the support plate 44, meaning it also provides support for the screening cylinder 41. During the movement of the screening cylinder 41, both the guide rod 46 and the cylindrical rollers 48 on either side of it support the cylinder. A limiting block 49 is also provided on the support plate 44 to limit the movement of the guide rod 46. The limiting block 49 has a through hole through which the guide rod 46 passes, guiding the movement by engaging with the outer circumferential surface of the guide rod 46 through the through hole.

[0048] like Figure 7 , Figure 8 and Figure 9 As shown, a rotating wheel 451 is provided on the rotary motor 45. The rotating wheel 451 includes a cylindrical panel and a connecting shaft 452 located on one side of the panel. A connecting structure located at the center of the panel is provided at the end of the panel away from the connecting shaft 452. The connecting structure is fixedly connected to the rotary motor 45, and the connecting shaft 452 is eccentrically positioned. That is, during the rotation of the rotary motor 45, the connecting shaft 452 will move in a circular motion around the axis of the panel. The guide rod 46 includes a waist-shaped ring in the middle and rods connected to both sides of the waist-shaped ring. An insertion hole 461 for the connecting shaft 452 to be inserted is formed in the middle of the waist-shaped ring. The insertion hole 461 is an elongated hole, and the extension direction of the insertion hole 461 is perpendicular to the movement direction of the guide rod 46. During the rotation of the rotary motor 45, the connecting shaft 452 performs a circular motion, engaging with different positions of the insertion hole 461. Since the guide rod 46 is limited by the limiting block 49, it can only perform reciprocating linear motion in a fixed direction, thus converting the rotation of the rotary motor 45 into linear motion of the guide rod 46 and the screening cylinder 41. It is worth noting that, for ease of cleaning after use, a baffle 42 is also provided on the side wall of the screening cylinder 41. The baffle 42 is vertically arranged and engages with the side wall of the screening cylinder 41.

[0049] like Figure 10As shown, a detection module is installed at the bottom of the screening cylinder 41. The detection module includes a sample receiving module 51 and a nutrient detection mechanism. The sample receiving module 51 is located above the base plate 14, and the nutrient detection mechanism 52 is located below the base plate 14. The sample receiving module 51 is a square box with a handle, and its top opening is used to receive the corn cobs screened in the screening cylinder 41. The nutrient detection mechanism 52 includes a photoelectric detection module 521, a data processing module 522, and a control circuit module 523. The switch 22 can control the control circuit to provide power for the operation of each module. The light source of the photoelectric detection module 521 illuminates the sample through a lens. The light signal after diffuse reflection from the sample is processed by the optical structure of the photoelectric detection module 521 to obtain a set of spectral signals, which are sent to the data processing module 522 for processing. After processing by an adaptive model established by a deep learning algorithm, the moisture, nitrogen, phosphorus, potassium, organic carbon, organic matter content, and pH value in the edible fungus culture medium are retrieved. These data, along with the location information obtained by the positioning module 524, are uploaded to the cloud via the communication module 525. The results are compared and analyzed with those in the expert database to obtain the current nutritional status of the corn cob and the necessary fertilization and irrigation information. This fertilization and irrigation information is then transmitted to the display 21 to provide guidance to the operators.

[0050] Specifically, when nutrient testing of the culture medium is required, the medium to be tested is first placed into the grinding cylinder 31. Then, the power is turned on, and the stirring paddle inside the grinding cylinder rotates to break up the medium. The degree of breakage is detected by a vision camera 24. When the vision camera 24 detects that the medium has been properly broken up, an alarm is triggered, prompting the operator to proceed to the next step. Next, the grinding motor 32 is stopped, and the sealing plate 34 is opened, allowing the medium to fall. To allow more medium to fall, the operating door is opened to scoop out the medium, facilitating its entry into the next process. The medium then needs to be screened to select appropriately sized samples for testing. The reciprocating motion of the screening cylinder causes the medium to vibrate, and samples meeting the size requirements fall from the screening cylinder into the sample receiving module. The detection module then detects the nutrients in the medium. By comparing and analyzing the obtained nutrient information with an expert database, the required parameters are determined and displayed on a monitor for operator reference.

[0051] In Embodiment 2 of the culture medium nutrient detection equipment of the present invention: Regarding the setting of the screening device, this embodiment proposes a new arrangement. Unlike Embodiment 1, in this embodiment, the cleaning port is no longer provided on the side wall of the vibrating screen, and the support plate and support rod on the screening device are detachably connected. After use, the screening device can be disassembled for cleaning.

[0052] In Embodiment 3 of the culture medium nutrient detection device of the present invention: Regarding the setting of the screening device and the detection module, this embodiment proposes a new arrangement. Unlike Embodiment 1, in this embodiment, the detection module is set outside the area enclosed by the support rod, and the material screened by the screening device is transported to the detection module through the guide tube.

[0053] In Embodiment 4 of the culture medium nutrient detection device of the present invention: Regarding the setting of the guide rod of the screening device, this embodiment proposes a new arrangement. Unlike Embodiment 1, the guide rod in this embodiment is plate-shaped, the width of the guide rod is the same everywhere, and an elongated hole is provided in the middle of the guide rod.

[0054] In Embodiment 5 of the culture medium nutrient detection device of the present invention: Regarding the setting of the vibrating screen in the screening device, this embodiment proposes a new arrangement. Unlike Embodiment 1, the driving structure on the vibrating screen in this embodiment is set as a cylinder located on one side of the screening container. The action of the cylinder causes the vibrating container to make linear reciprocating motion.

[0055] In Embodiment 6 of the culture medium nutrient detection device of the present invention: Regarding the setting of the guide rod, this embodiment proposes a new arrangement. Unlike Embodiment 1, one end of the guide rod in this embodiment is provided with a rack structure, the power source is a stepper motor, and a gear is connected to the stepper motor. The movement of the guide rod is started by meshing the gear with the rack structure.

[0056] In Embodiment 7 of the culture medium nutrient detection device of the present invention: Regarding the setting of the rolling element, this embodiment proposes a new arrangement. Unlike Embodiment 1, the rolling element in this embodiment is set as a universal roller.

[0057] In Embodiment 8 of the culture medium nutrient detection device of the present invention: Regarding the arrangement of the rolling element, this embodiment proposes a new arrangement. Unlike Embodiment 1, in this embodiment, the rolling element is no longer arranged symmetrically with respect to the guide rod, but is only arranged on one side of the guide rod.

[0058] In Embodiment 9 of the culture medium nutrient detection device of the present invention: Regarding the arrangement of the rolling elements, this embodiment proposes a new arrangement. Unlike Embodiment 1, the rolling elements in this embodiment are cylindrical rollers, and four cylindrical rollers are arranged symmetrically on both sides of the guide rod.

[0059] In Example 10 of the culture medium nutrient detection device of the present invention: Regarding the setting of the connecting ribs, this example proposes a new arrangement. Unlike Example 1, in this example, the connecting ribs are no longer set with parallel connecting ribs, but with a single connecting rib, and the guide rod is located above the connecting rib.

[0060] In Example 11 of the culture medium nutrient detection device of the present invention: Regarding the setting of the connecting ribs, this embodiment proposes a new arrangement. Unlike Example 1, the connecting ribs in this embodiment are no longer arranged in a "well" shape. The connecting ribs include parallel connecting ribs and vertical connecting ribs located within the parallel connecting ribs.

[0061] In Embodiment 12 of the culture medium nutrient detection device of the present invention: Regarding the setting of the clearance hole, this embodiment proposes a new arrangement. Unlike Embodiment 1, in this embodiment, the connecting rib is no longer set in the clearance hole, and there is only one rolling element. The rolling element includes a large diameter section located on both sides of the guide rod and a small diameter section located below the guide rod. The large diameter section provides rolling support for the screening container.

[0062] In Embodiment 13 of the culture medium nutrient detection device of the present invention: Regarding the setting of the screening device, this embodiment proposes a new arrangement. Unlike Embodiment 1, in this embodiment, the support base is no longer set as a support plate, but is a support mesh composed of longitudinally and transversely arranged connecting rods welded together. The vibrating screen is supported by the mesh, and the mesh holes on the support mesh constitute a passage structure.

[0063] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. A medium nutrient detection device, comprising a frame body, a screening device arranged on the frame body, and a detection module located below the screening device, the screening device comprising a vibrating screen for loading and screening materials, characterized in that: The vibrating screen includes a screening cylinder with a guide rod fixed in the middle of its bottom surface and a drive structure that drives the guide rod to move, thereby causing the screening cylinder to reciprocate. The screening device also includes a support base located below the screening cylinder. The guide rod is supported on the support base and moves in a guiding manner with the support base. The support base is provided with a passage structure for the material falling from the screening cylinder to fall into the detection module. The support base is also provided with two rolling elements for supporting the screening cylinder during its reciprocating movement. The two rolling elements are symmetrically arranged on both sides of the guide rod. Both rolling elements are cylindrical rollers and the extension direction of their rotation axis is perpendicular to the direction of the guide rod. The direction of movement is reversed; the support base is provided with a clearance hole, and a connecting rib is connected to the wall of the clearance hole. The grid formed between the connecting rib and the wall of the clearance hole forms a passage structure; the connecting rib includes two parallel connecting ribs and two vertical connecting ribs that are perpendicularly connected to the two parallel connecting ribs respectively; the rolling element is installed between the part of the parallel connecting rib located between the two vertical connecting ribs and the wall of the clearance hole, or installed between the vertical connecting rib and the wall of the clearance hole; the driving structure includes a rotary power source, which is located below the support base and fixed on the square grid formed by the two parallel connecting ribs and the two vertical connecting ribs.

2. The media nutrient detection apparatus of claim 1, wherein: The rotational power source is a rotary electric motor.

3. The media nutrient detection apparatus of claim 1, wherein: The frame is also equipped with a crushing device, which is located above the screening device. The crushing device crushes the culture medium, and the crushed culture medium enters the screening device.

4. The media nutrient detection apparatus of claim 1, wherein: The guide rod is located above the middle of the two parallel connecting ribs.

5. The media nutrient detection apparatus of claim 4, wherein: The clearance hole is circular, the guide rod crosses the clearance hole radially, and the rotation axes of the two cylindrical rollers extend radially along the clearance hole.

6. The medium nutrient detection apparatus according to any one of claims 1 to 5, characterized by: The support base is a support plate, and two limiting blocks are provided on the top surface of the support plate. Each limiting block has a through hole for the guide rod to pass through. The through hole cooperates with the outer circumferential surface of the guide rod to guide the movement of the guide rod.

7. The medium nutrient detection apparatus according to any one of claims 1 to 5, characterized by: The output end of the rotary power source is connected to a rotating wheel, and a connecting shaft is eccentrically mounted on the rotating wheel. The middle part of the guide rod is provided with a socket for inserting the connecting shaft. The socket is an elongated hole, and the extension direction of the socket is perpendicular to the movement direction of the guide rod.

8. The media nutrient detection apparatus of claim 7, wherein: The guide rod includes a waist-shaped ring in the middle and rods connected to both sides of the waist-shaped ring. The inner hole of the waist-shaped ring forms the insertion hole.

9. The medium nutrient detection apparatus according to any one of claims 1 to 5, characterized by: A cleaning port is provided on the side wall of the screening cylinder, and a baffle is inserted into the cleaning port.

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