High-temperature sterilization device for seedling substrate

Abstract

The invention relates to the technical field of seedling culture medium sterilization, and particularly discloses a high-temperature sterilization device for a seedling culture medium, the high-temperature sterilization device comprises a sterilization tank and a high-temperature steam tank, an inner tank body is rotatably arranged in the sterilization tank, and the seedling culture medium to be sterilized is stored in the inner tank body; the sterilization mechanism is arranged in the inner tank body, and the sterilization mechanism comprises a steam nozzle communicated with the high-temperature steam tank; the mixing mechanism comprises stirring blades and an overturning assembly, the stirring blades are arranged on the inner wall of the inner tank body in an annular array mode and are spirally and obliquely distributed, and the overturning assembly is vertically arranged in the middle of the interior of the inner tank body; a power mechanism is further arranged at the bottom of the inner tank body and comprises a driving device and a transmission mechanism, and the transmission mechanism is located at the output end of the driving device and is in transmission connection with the inner tank body; and the stirring blades and the overturning assembly are used for dynamically stirring and overturning accumulated in the device, so that high-temperature steam can be quickly diffused and permeated, and the seedling culture substrate can be efficiently sterilized.

Description

Technical Field

[0001] The present invention relates to the technical field of sterilization of nursery substrates, and specifically discloses a high-temperature sterilization device for nursery substrates. Background Art

[0002] In the field of agricultural seedling raising, the high-temperature sterilization treatment of nursery substrates is a key link to ensure the healthy growth of seedlings. Currently, the commonly used high-temperature steam sterilization equipment sterilizes harmful microorganisms such as germs and eggs in the substrate by introducing steam into the sterilization container. However, in this static steam sterilization equipment, due to the tight stacking of the nursery substrates inside, the steam penetration is uneven, resulting in many sterilization dead corners, low efficiency, and easy local overheating or incomplete sterilization. Therefore, currently on the market, a mixing mechanism is often set in the sterilization tank to turn the substrate to promote the contact between the steam and the substrate, thereby achieving sterilization.

[0003] However, when this sterilization device with a stirring structure added in the sterilization tank is actually applied, there are still certain defects. That is, its mixing mechanism generally adopts an external stirring structure, which is difficult to form an efficient collaborative cooperation with the sterilization tank. During the sterilization operation, it is difficult to take into account the all-round turning of the substrate and the uniform penetration of the steam. Its stirring blades are mostly fixed on the inner wall or the central axis of the sterilization tank, and can only achieve stirring in a single direction. The vertical mixing between substrate layers is insufficient, and the steam is difficult to penetrate deep materials, resulting in easy formation of dead corners during the sterilization of the substrate. Especially for the substrates at the edge or the central area of the tank body, the contact with the steam is insufficient, resulting in poor sterilization effect and low efficiency of the device. Summary of the Invention

[0004] The purpose of the present invention is to provide a high-temperature sterilization device for nursery substrates to solve the technical problems of poor sterilization effect and low efficiency existing in the prior art.

[0005] Specifically, the present invention is realized through the following technical solutions:

[0006] A high-temperature sterilization device for nursery substrates includes a sterilization tank and a high-temperature steam tank. An inner tank is rotatably provided inside the sterilization tank, and the nursery substrates to be sterilized are stored inside the inner tank. It further includes:

[0007] A sterilization mechanism, which is provided inside the inner tank, and the sterilization mechanism includes a steam nozzle communicated with the high-temperature steam tank;

[0008] A mixing mechanism, which includes stirring blades and a turning component. The stirring blades are annularly arranged on the inner wall of the inner tank and are spirally inclined, and the turning component is vertically arranged in the middle inside the inner tank;

[0009] The bottom of the inner tank body is also provided with a power mechanism, which includes a driving device and a transmission mechanism, wherein the transmission mechanism is located at the output end of the driving device and is transmission-connected to the inner tank body, and the driving device is transmission-connected to the flip assembly;

[0010] When the steam nozzle sprays high-temperature steam for sterilization, the driving device drives the flip assembly to work, and drives the inner tank body to rotate through the transmission mechanism, so as to drive the stirring blades and the flip assembly to stir and flip the seedling culture matrix inside the inner tank body.

[0011] It should be noted that the above technical solution cleverly integrates the mixing mechanism into the rotatable inner tank body, and a power mechanism is provided at the bottom of the inner tank body. Since the mixing mechanism includes stirring blades and a flipping assembly, and the power mechanism includes a driving device and a transmission mechanism, and the driving device is used to drive the flipping assembly to work, and the transmission mechanism is used to transmit the power of the driving device to the inner tank body to cause the inner tank body to rotate, when the steam nozzle sprays high-temperature steam to sterilize the seedling matrix stored in the inner tank body, the inner tank body can rotate, and dynamically stir and flip the deposited therein through the stirring blades and the flipping assembly, so as to facilitate the high-temperature steam to quickly diffuse and penetrate into the seedling matrix, thereby efficiently sterilizing the seedling matrix.

[0012] Further, the specific structure of the flip assembly in the above technical solution is explained here, the flip assembly includes a flip plate and a motion rod, the flip plate is circumferentially arranged outside the motion rod, the motion rod includes a rotating rod and a sleeve rod which are coaxially sleeved and rotatably matched, the bottom end of the rotating rod passes through the inner tank body and is connected to the output end of the driving device, an annular wave groove is opened on the outside of the rotating rod corresponding to the position of each flip plate, and a moving block is slidably arranged in the annular wave groove, one end of each flip plate is provided with a connecting handle that passes through the inside of the sleeve rod and is movably connected to the moving block, the connecting handle is ball-connected with the sleeve rod through a ball joint at the position where the connecting handle passes through the sleeve rod, and the ball joint is slidably matched with the connecting handle;

[0013] When the rotating rod rotates, the sleeve rod remains stationary.

[0014] It should be understood that the flipping assembly based on the above technical solution realizes the dynamic flipping action of the flipping plate through the coordinated movement mechanism of the rotating rod and the sleeve rod, combined with the ingenious cooperation of the annular wave groove and the ball joint, thereby solving the technical problem that traditional sterilization equipment is difficult to flip the substrate in the vertical direction during the sterilization process, resulting in the deep seedling substrate being difficult to contact with high-temperature steam, thus affecting the sterilization effect.

[0015] Furthermore, the middle position at the top of the inner tank body is rotationally supported and rotatably connected to the sterilization tank. At the middle position of the bottom of the inner tank body, a flange plate that is rotationally sealed with it is also provided. The flange plate is connected to the sleeve rod. A through hole for the rotating rod to pass through is also provided in the middle of the top of the flange plate, and the flange plate is rotationally sealed with the rotating rod through the through hole.

[0016] It can be expected that through the rotational support and the flange plate, it is convenient for the inner tank body to rotate. The flange plate is connected to the sleeve rod, and the flange plate is rotationally sealed with the rotating rod, which is convenient for the sleeve rod and the flange plate to always remain stationary and not follow the rotation during the rotation of the inner tank body and the rotating rod.

[0017] Specifically, a plurality of steam nozzles are provided, and they are respectively located at the positions below the turning plates outside the sleeve rod and are attached to the outside of the sleeve rod. The steam nozzles are connected to the high-temperature steam tank through pipelines.

[0018] In the above solution, the steam nozzles are arranged below the turning plates. By utilizing the dynamic turning characteristics of the turning plates, it is possible to push the substrate particles in front of the spraying path of the steam nozzles, so as to form a relatively loose material gap around the steam nozzles, facilitating the high-temperature steam ejected from the steam nozzles to quickly penetrate into the seedling-raising substrate, thereby realizing the rapid and efficient sterilization of the seedling-raising substrate.

[0019] Furthermore, the pipeline includes a main pipe and a plurality of branch pipes. One end of the main pipe is connected to the high-temperature steam tank, and the other end penetrates into the sterilization tank. A plurality of the branch pipes are arranged in the inner wall layer of the sleeve rod. One end of each branch pipe is connected to the main pipe, and the other end is respectively connected to the corresponding steam nozzle.

[0020] In this solution, through the arrangement of the main pipe and the plurality of branch pipes, it is convenient for the high-temperature steam in the high-temperature steam tank to be sequentially transported to the corresponding steam nozzles through the main pipe and the plurality of branch pipes, realizing that each steam nozzle can stably eject high-temperature steam to ensure the uniform supply of high-temperature steam to the seedling-raising substrate in different regions of the inner tank body. And it should be further explained that in this solution, the plurality of branch pipes are arranged in the inner wall layer of the sleeve rod, and a heat conduction path of "branch pipe - sleeve rod - substrate" is constructed by using the metal material of the sleeve rod (preferably stainless steel with good thermal conductivity). That is, when the high-temperature steam flows in the branch pipes, the heat is conducted to the sleeve rod body through the pipe wall, so that the surface temperature of the sleeve rod rises synchronously with the steam temperature, forming a cylindrical heat radiation source around the central axis to continuously conduct heat to the substrate within a certain range around the sleeve rod, so as to comprehensively sterilize the seedling-raising substrate in the inner tank body.

[0021] Preferably, the transmission mechanism includes a driving gear, a transmission gear and a driven gear ring that mesh with each other. The driving gear is sleeved outside the output end of the driving device. The transmission gears are arranged in an array around the driving gear and are respectively connected to the flange and the sterilization tank through gear rods passing through their interiors. The driven gear ring is sleeved outside the transmission gears and is connected to the bottom edge of the inner tank.

[0022] Based on the above content, it can be seen that the transmission mechanism in this solution includes a driving gear, a transmission gear and a driven gear ring, which essentially form a planetary gear set and realize the differential reverse rotation between the inner tank and the rotating rod to construct a three-dimensional cyclic seedling-growing substrate flow field inside the inner tank, so that the originally tightly packed substrate layer is decomposed into a fluffy loose granular structure, greatly improving the penetration rate of high-temperature steam, thereby realizing the efficient and rapid sterilization operation of the seedling-growing substrate.

[0023] Furthermore, at the position corresponding to each of the steam nozzles outside the sleeve rod, a groove for installing the steam nozzle is also provided.

[0024] In this solution, through the embedded installation of the groove, only the nozzle part of the steam nozzle is exposed on the sleeve rod, while the rest is located in the groove and is wrapped by the side wall of the groove, thereby reducing the collision probability between the seedling-growing substrate and the steam nozzle and avoiding the direct impact of substrate particles on the steam nozzle, resulting in its damage, so as to realize the long-term normal use of the steam nozzle.

[0025] Preferably, a filter screen is provided at the opening position of the groove.

[0026] In this solution, by providing a filter screen at the opening of the groove, the filter screen serves as a physical barrier to form a filtering interface at the opening of the groove, allowing high-temperature steam (gaseous molecules) to pass through unobstructed, while blocking solid impurities from entering and contacting the nozzle part of the steam spray group, thereby further preventing the particle or fiber impurities in the seedling-growing substrate from clogging the steam nozzle.

[0027] Further preferably, a cleaning member is also provided on the side of the filter screen close to the steam nozzle. The cleaning member includes a scraper and a brush attached to the side of the scraper corresponding to the filter screen. Sliding mechanisms are also provided on the two side walls of the groove. The sliding mechanisms include vertically opened sliding grooves, sliders slidably arranged inside the sliding grooves, springs arranged along the length direction of the sliding grooves and connected to the sliders and the sliding grooves at both ends respectively. Each of the sliders is connected to one end corresponding to the scraper, and the upper part of the slider is connected to the connecting handle of the turning plate through a steel wire rope passing through the wall layer of the sleeve rod.

[0028] This technical solution specifically realizes the cleaning of the filter screen by setting a cleaning member to cooperate with the flipping plate, avoiding the blockage of the filter screen. That is, when the flipping plate flips up and down, its connecting handle drives the slider to slide in the chute through a steel wire rope, and then the slider drives the scraper to move up and down. After the scraper moves up and down, the particles in the filter screen holes and on the outer surface of the filter screen are cleaned and scraped by the brush, so that the cleaning member can clean the filter screen periodically and frequently during the normal operation of the equipment, thus avoiding the blockage of the filter screen and affecting the spraying and diffusion of high-temperature steam, ensuring that the steam nozzle can stably maintain the spraying of high-temperature steam during the sterilization process, providing guarantee for the sterilization process of the sterilization device, and improving the sterilization efficiency of the device.

[0029] More specifically, a feed pipe and a discharge pipe are respectively provided at the top and bottom of the sterilization tank. The bottom end of the feed pipe penetrates through the rotary support and is connected to the inner tank, and the top end of the discharge pipe penetrates through the flange and is connected to the inner tank.

[0030] In this solution, the setting of the feed pipe facilitates the operator to add the seedling-raising substrate into the inner tank of the sterilization tank. The bottom end of the feed pipe penetrating through the rotary support ensures that it will not hinder the rotation of the inner tank. Similarly, the setting of the discharge pipe facilitates the operator to discharge the seedling-raising substrate after high-temperature sterilization. The top end of the discharge pipe penetrating through the flange and being connected to the inner tank can also ensure that it will not hinder the rotation of the inner tank during its discharging.

[0031] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0032] 1. The present invention ingeniously integrates the mixing mechanism inside the rotatable inner tank, and a power mechanism is provided at the bottom of the inner tank. Since the mixing mechanism includes stirring blades and a flipping assembly, and the power mechanism includes a driving device and a transmission mechanism, and the driving device is used to drive the flipping assembly to work, and the transmission mechanism is used to transmit the power of the driving device to the inner tank to promote the rotation of the inner tank. Therefore, when the steam nozzle sprays high-temperature steam to sterilize the seedling-raising substrate stored in the inner tank, the inner tank can rotate, and the stirring blades and the flipping assembly perform dynamic stirring and flipping on the accumulation inside it, so as to facilitate the rapid diffusion and penetration of high-temperature steam in the seedling-raising substrate, thereby achieving efficient sterilization of the seedling-raising substrate.

[0033] 2. The flipping component in the present invention realizes the dynamic flipping action of the flipping plate through the coordinated movement mechanism of the rotating rod and the sleeve rod, and in combination with the ingenious cooperation of the annular wave groove and the ball joint, cleverly converts the rotational movement of the rotating rod into the pitching swing of the flipping plate. With the circumferentially staggered distribution layout of the flipping plate, the seedling-growing substrate is turned while rotating with the inner tank body, and is subjected to turning actions from different heights and angles, which destroys the interlayer accumulation of the seedling-growing substrate. Then, under the coordinated action of the stirring blades and the flipping plate, a three-dimensional cyclic substrate flow field is formed inside the inner tank, so as to continuously turn the deep seedling-growing substrate to the surface to contact the high-temperature steam for sterilization, effectively avoiding the sterilization dead angles in the central area and the edge area of the seedling-growing substrate, enabling the high-temperature steam to uniformly penetrate into every corner of the substrate, improving the sterilization efficiency while ensuring the consistency and thoroughness of the sterilization effect;

[0034] 3. In the present invention, by embedding the steam nozzle in the groove, only the nozzle part of the steam nozzle is exposed on the sleeve rod, and the rest is located in the groove and is wrapped by the side wall of the groove, thereby reducing the collision probability between the seedling-growing substrate and the steam nozzle, avoiding the direct impact of the substrate particles on the steam nozzle and causing its damage, and thus realizing the long-term normal use of the steam nozzle;

[0035] 4. In the present invention, by arranging a filter screen at the opening of the groove, the filter screen serves as a "selective barrier" to form a filtering interface at the opening of the groove, allowing the high-temperature steam (gaseous molecules) to pass through unobstructed while blocking the solid impurities from entering and contacting the nozzle part of the steam spray group, thereby further avoiding the blockage of the steam nozzle by the particulate or fibrous impurities in the seedling-growing substrate;

[0036] 5. The present invention further arranges a cleaning member to cooperate with the flipping plate to clean the filter screen, avoiding the blockage of the filter screen and affecting the spraying and diffusion of the high-temperature steam, and finally realizing the efficient and continuous sterilization operation of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, form a part of this application, and do not limit the embodiments of the present invention. In the drawings:

[0038] Figure 1 is the overall structural schematic diagram of Embodiment 1 of the present invention;

[0039] Figure 2 is for the present invention Figure 1 internal structural schematic diagram of the sterilization tank;

[0040] Figure 3 is the partial structural schematic diagram of the flipping component of Embodiment 1 of the present invention, aiming to show the specific structure of the flipping component;

[0041] Figure 4 This is a schematic diagram of the internal structure of the sterilization tank in Embodiment 2 of the present invention, aiming to show the groove;

[0042] Figure 5 This is a partial structural schematic diagram of the steam nozzle in Embodiment 2 of the present invention, aiming to show the installation state of the steam nozzle and the groove;

[0043] Figure 6 This is a partial structural schematic diagram of the cleaning part in Embodiment 3 of the present invention, aiming to show its specific mechanism;

[0044] Figure 7 This is a top view sectional structural schematic diagram of the sleeve rod in Embodiment 3 of the present invention, aiming to show the array of steam nozzles on the sleeve rod;

[0045] Figure 8 This is a schematic diagram of the internal structure of the sterilization tank in Embodiment 4 of the present invention, aiming to show the spiral tube;

[0046] Figure 9 This is a schematic diagram of the overall structure of Embodiment 4 of the present invention.

[0047] The reference numerals represent: 1. Sterilization tank; 11. Inner tank body; 12. Steam nozzle; 13. Stirring blade; 141. Flipping plate; 142. Rotating rod; 143. Sleeve rod; 144. Annular wave groove; 145. Moving block; 146. Connecting handle; 147. Ball joint; 2. Power mechanism; 21. Driving device; 221. Driving gear; 222. Transmission gear; 223. Driven gear ring; 3. Rotating support; 4. Flange; 5. Groove; 51. Filter screen; 531. Scraper; 532. Slide groove; 533. Slide block; 534. Spring; 535. Steel wire rope; 6. Pipeline; 61. Main pipe; 62. Branch pipe; 71. Feed pipe; 72. Discharge pipe; 8. Rotating plate; 81. Annular cavity; 82. Transmission cavity; 83. Spiral tube; 9. High-temperature steam tank. Detailed implementation manners

[0048] To make the objectives, technical solutions, and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with the embodiments and the drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and do not limit the present invention. It should be noted that the present invention has been in the actual R & D and use stage.

[0049] Embodiment 1;

[0050] Please refer to Figures 1 to 3 As shown, this embodiment discloses a high-temperature sterilization device for nursery substrate, including a sterilization tank 1 and a high-temperature steam tank 9. An inner tank body 11 is rotatably provided inside the sterilization tank 1, and the nursery substrate to be sterilized is stored inside the inner tank body 11; further including:

[0051] A sterilization mechanism is provided inside the inner tank body 11. The sterilization mechanism includes a steam nozzle 12 communicated with a high-temperature steam tank 9.

[0052] A mixing mechanism includes a stirring blade 13 and a turnover assembly. The stirring blades 13 are arranged in an annular array on the inner wall of the inner tank body 11 and are distributed in a spiral and inclined manner. The turnover assembly is vertically arranged in the middle inside the inner tank body 11.

[0053] A power mechanism 2 is further provided at the bottom of the inner tank body 11. The power mechanism 2 includes a driving device 21 and a transmission mechanism. The transmission mechanism is located at the output end of the driving device 21 and is in transmission connection with the inner tank body 11. The driving device 21 is in transmission connection with the turnover assembly.

[0054] When the steam nozzle 12 sprays high-temperature steam for sterilization operation, the driving device 21 drives the turnover assembly to work, and drives the inner tank body 11 to rotate through the transmission mechanism, so as to drive the stirring blade 13 and the turnover assembly to stir and turnover the seedling-growing substrate inside the inner tank body.

[0055] It should be understood that when sterilizing the seedling-growing substrate, since the seedling-growing substrate is in a piled state after entering the sterilization tank 1, when high-temperature steam is introduced for sterilization, the high-temperature steam can only contact the seedling-growing substrate near the steam nozzle 12 on the surface layer, and it is difficult to diffuse into the deep-layer seedling-growing substrate, resulting in poor sterilization effect on the deep-layer substrate of the device and affecting the overall sterilization efficiency of the device.

[0056] Therefore, for this application, to solve this technical problem, the mixing mechanism is cleverly integrated inside the rotatable inner tank body 11, and a power mechanism 2 is provided at the bottom of the inner tank body 11. The mixing mechanism includes a stirring blade 13 and a turnover assembly, and the power mechanism 2 includes a driving device 21 and a transmission mechanism. The driving device 21 is used to drive the turnover assembly to work, and the transmission mechanism is used to transmit the power of the driving device 21 to the inner tank body 11 to promote the rotation of the inner tank body 11. Therefore, when the steam nozzle 12 sprays high-temperature steam to sterilize the seedling-growing substrate stored in the inner tank body 11, the inner tank body 11 can rotate, and the piled substrate inside it is dynamically stirred and turned over by the stirring blade 13 and the turnover assembly, so as to facilitate the rapid diffusion and penetration of high-temperature steam in the seedling-growing substrate, thereby realizing efficient sterilization of the deep-layer seedling-growing substrate and ensuring effective improvement of the overall sterilization effect and sterilization efficiency of the device.

[0057] Specifically, during the sterilization operation, when the high-temperature steam in the high-temperature steam tank 9 enters the steam nozzle 12 and sprays out, the driving device 21 starts to work. The driving device 21 is preferably a motor. After it works, it can rotate and quickly drive the inner tank body 11 to rotate through the transmission mechanism, so that the inner tank body 11 drives the stirring blades 13 to rotate synchronously after rotation. Since the stirring blades 13 are arranged in an annular array on the inner wall of the inner tank body 11 and are distributed in a spiral and inclined manner, when the stirring blades 13 rotate, they stir the nursery substrate at the four peripheral edges of the inner tank body 11 and generate a circumferential thrust and an axial lift. In this way, the nursery substrate at the four peripheral edges of the inner tank body 11 can be gradually stirred and pushed to the middle of the inner tank body 11. At the same time, when the inner tank body 11 drives the stirring blades 13 to rotate and work, the driving device 21 drives the flipping assembly to start working. Then, after the flipping assembly works, through its flipping movement in the vertical direction, the nursery substrate is flipped synchronously during the stirring process, so as to continuously adjust the interlayer position of the nursery substrate, further break through the traditional single-direction stirring mode, and form a three-dimensional mixture, thereby breaking the static stacking state of the nursery substrate, making the nursery substrate form an all-round tumbling and dispersion during the sterilization process, and further promoting the full contact between the nursery substrate in the deep layer of the inner tank body 11 and the high-temperature steam when the steam nozzle 12 sprays out the high-temperature steam, avoiding the generation of steam penetration dead angles, so as to realize the dynamic and uniform sterilization of the nursery substrate in the inner tank body 11 and improve the sterilization effect and efficiency of the device.

[0058] Furthermore, in the above embodiment, as Figure 2 and Figure 3 , the flipping assembly includes a flipping plate 141 and a moving rod. The flipping plate 141 is circumferentially arranged outside the moving rod and is equally spaced from top to bottom. The moving rod includes a rotating rod 142 and a sleeve rod 143 that are coaxially sleeved and rotatably matched. The bottom end of the rotating rod 142 penetrates through the inner tank body 11 and is connected to the output end of the driving device 21. An annular wave groove 144 is formed at each position corresponding to the flipping plates 141 on the outside of the rotating rod 142, and a moving block 145 is slidably arranged in the annular wave groove 144. One end of each flipping plate 141 is provided with a connecting handle 146 that penetrates into the sleeve rod 143 and is movably connected to the moving block 145. The position where the connecting handle 146 penetrates the sleeve rod 143 is ball-jointed to the sleeve rod 143 through a ball joint 147, and the ball joint 147 is slidably matched with the connecting handle 146;

[0059] And when the rotating rod 142 rotates, the sleeve rod 143 remains stationary.

[0060] During specific implementation, the driving device 21 drives the rotating rod 142 to rotate inside the sleeve rod 143, while the sleeve rod 143 remains stationary, so the annular wave groove 144 outside the rotating rod 142 will rotate accordingly, and force the moving block 145 to slide along the trajectory of its groove body. Since the groove body trajectory of the annular wave groove 144 is a sine curve, it has periodic peaks and troughs. Therefore, when the moving block 145 periodically moves to the peaks and troughs, it can drive the connecting handle 146 to produce regular dynamic pitch angle changes on the sleeve rod 143 through the ball joint 147 that slides with it, thereby driving the flip plate 141 to flip up and down.

[0061] Specifically, when the moving block 145 is at the crest position, the connecting handle 146 is pulled upward, causing the flip plate 141 to tilt downward around the ball joint 147, insert into the lower seedling matrix and push it to spread out in all directions; and when the moving block 145 slides to the trough position, the connecting handle 146 is pressed downward, causing the flip plate 141 to rise upward, forming a throwing force on the upper seedling matrix, thereby converting the rotational motion of the rotating rod 142 into the pitching swing of the flip plate 141, and coordinating with the circumferentially staggered layout of the flip plate 141, so that the seedling matrix can be spread out in all directions. While the tank body 11 is rotating, it is subjected to flipping action from different heights and angles, and the interlayer accumulation of the seedling matrix is ​​destroyed, so that the seedling matrix forms a three-dimensional circulating matrix flow field in the inner tank body 11 under the synergistic action of the stirring blades 13 and the flip plate 141, so as to promote the deep seedling matrix to be continuously flipped to the surface to contact the high-temperature steam for sterilization, effectively avoiding the sterilization dead corners in the central area and the edge area of ​​the seedling matrix, and allowing the high-temperature steam to evenly penetrate into every corner of the matrix, while improving the sterilization efficiency and ensuring the consistency and thoroughness of the sterilization effect.

[0062] It can be understood that the flipping assembly based on the above-mentioned embodiment realizes the dynamic flipping action of the flipping plate 141 through the coordinated movement mechanism of the rotating rod 142 and the sleeve rod 143, and the clever cooperation of the annular wave groove 144 and the ball joint 147, thereby solving the technical problem that it is difficult for traditional sterilization equipment to flip the matrix vertically during the sterilization process, resulting in the deep seedling matrix being difficult to contact with high-temperature steam, thereby affecting the sterilization effect.

[0063] Specifically, Figure 2 As shown in the figure, the middle position of the top of the inner tank body 11 is rotatably connected to the sterilization tank 1 through the rotating support 3, and a flange 4 rotatably sealed therewith is also provided at the middle position of the bottom of the inner tank body 11, the flange 4 is connected to the sleeve rod 143, and a through hole for the rotating rod 142 to pass through is also opened in the middle of the top of the flange 4, and the flange 4 is rotatably sealed with the rotating rod 142 through the through hole.

[0064] It can be expected that in this embodiment, by rotating the support 3 and the flange 4, it is convenient for the inner tank body 11 to rotate smoothly. Further, the flange 4 is connected to the sleeve rod 143, and the flange 4 is rotationally sealed with the rotating rod 142, which is convenient for the sleeve rod 143 and the flange 4 to always remain stationary and not rotate during the rotation of the inner tank body 11 and the rotating rod 142.

[0065] As Figure 2 shown, a plurality of steam nozzles 12 are provided and are respectively located at positions below the turnover plate 141 outside the sleeve rod 143. Specifically, as Figure 3 shown, the steam nozzles 12 are attached to the outside of the sleeve rod 143 and are connected to the high-temperature steam tank 9 through the pipeline 6.

[0066] Through the above implementation manner, the steam nozzles 12 are arranged below the turnover plate 141, which cleverly utilizes the dynamic turnover characteristics of the turnover plate 141 to push the matrix particles in front of the spraying path of the steam nozzles 12, so as to form a relatively loose material gap around the steam nozzles 12, facilitating the high-temperature steam ejected by the steam nozzles 12 to quickly penetrate into the seedling-growing substrate, thereby realizing rapid and efficient sterilization of the seedling-growing substrate.

[0067] Furthermore, as Figure 2 and Figure 3 shown, the pipeline 6 includes a main pipe 61 and a plurality of branch pipes 62. One end of the main pipe 61 is connected to the high-temperature steam tank 9, and the other end penetrates into the sterilization tank 1. The plurality of branch pipes 62 are arranged in the inner wall layer of the sleeve rod 143. One end of the branch pipes 62 is connected to the main pipe 61, and the other end is respectively connected to the corresponding steam nozzles 12.

[0068] Specifically, as Figure 1 shown, a delivery pump for continuously pumping the high-temperature steam in the high-temperature steam tank 9 into the inner tank body 11 is further provided on the main pipe 61.

[0069] In this embodiment, through the arrangement of the main pipe 61 and the plurality of branch pipes 62, it is convenient for the high-temperature steam in the high-temperature steam tank 9 to be pumped into the corresponding steam nozzles 12 through the main pipe 61 and the plurality of branch pipes 62 in sequence, realizing that each steam nozzle 12 can stably eject high-temperature steam to ensure uniform supply of high-temperature steam to the seedling-growing substrate in different areas of the inner tank body 11.

[0070] Furthermore, it is necessary to further explain that in this solution, the multi-way branch pipes 62 are arranged inside the inner wall layer of the sleeve rod 143. By using the metal material of the sleeve rod 143 (preferably stainless steel with good thermal conductivity), a heat conduction path of "branch pipe - sleeve rod 143 - substrate" is constructed. That is to say, when high-temperature steam flows in the branch pipe 62, heat is conducted through the pipe wall to the body of the sleeve rod 143, so that the surface temperature of the sleeve rod 143 rises synchronously with the steam temperature, forming a cylindrical heat radiation source around the central axis, and continuously conducting heat to the substrate within a certain range (such as a range of 5 - 10 cm) around the sleeve rod 143;

[0071] That is, preheating the deep-layer seedling-raising substrate exposed when the turning plate 141 is turned (such as the bottom cold material brought out when the turning plate 141 is inserted downward), thereby further making up for the instantaneous blind area of steam injection in space coverage. Specifically, the turning plate 141 throws the deep-layer low-temperature substrate towards the periphery of the sleeve rod 143. The sleeve rod 143 quickly raises the temperature of this part of the substrate through heat radiation and contact conduction. Subsequently, the stirring blade 13 pushes the preheated substrate to the tank wall area to receive the direct injection of the steam nozzle 12, and the high-temperature substrate near the tank wall flows back to the center under the action of spiral stirring, forming a temperature gradient convection with the heating area of the sleeve rod 143, so that the internal temperature field of the substrate changes from the traditional "high-temperature area at the nozzle center + low-temperature area at the edge" to a three-dimensional uniform heat field of "thermal core of the sleeve rod 143 + steam radiation + mechanical convection", ensuring comprehensive sterilization of the seedling-raising substrate in the inner tank body 11.

[0072] Preferably, please refer to Figure 2 , the transmission mechanism includes a driving gear 221, a transmission gear 222 and a driven gear ring 223 that mesh with each other. The driving gear 221 is sleeved outside the output end of the driving device. The transmission gears 222 are arranged in an array around the driving gear 221 and are respectively connected to the flange 4 and the sterilization tank 1 through gear rods passing through their interiors. The driven gear ring 223 is sleeved outside the transmission gear 222 and is connected to the bottom edge of the inner tank body 11.

[0073] In the above embodiment, the transmission mechanism includes a driving gear 221, a transmission gear 222 and a driven gear ring 223, which essentially form a planetary gear set and realize the differential reverse rotation between the inner tank body 11 and the rotating rod 142 to construct a three-dimensional stereoscopic circulating seedling-raising substrate flow field inside the inner tank body 11;

[0074] Furthermore, when the driving motor drives the rotating rod 142 to rotate, the driving gear 221 sleeved on the output end of the driving motor rotates synchronously. The driving gear 221 meshes with a plurality of transmission gears 222 at the same time. Since the transmission gears 222 are respectively connected to the flange 4 and the sterilization tank 1 through the gear rods, the transmission wheels are restricted, so that the transmission gears 222 can only rotate self-driven under the drive of the driving gear 221. And the self-rotation of the transmission gears 222 drives the driven gear ring 223 to rotate in the opposite direction to the driving gear 221. The driven gear ring 223 is fixed to the bottom of the inner tank body 11, so that the inner tank body 11 rotates in the opposite direction to the rotating rod 142, and finally forms a two-way motion system of "rotation of the inner tank body 11 + dynamic flipping of the flipping assembly".

[0075] At the same time, it can be expected that in this solution, through the reverse rotation of the inner tank body 11 and the rotating rod 142, when the stirring blades 13 and the flipping assembly stir and flip the seedling-growing substrate in the inner tank body 11, the relative speeds of the two are superimposed, so that the stirring blades 13 and the flipping assembly form a higher frequency and larger amplitude relative movement per unit time, thereby realizing three-dimensional mixing and shearing of the seedling-growing substrate in the inner tank body 11, so that the substrate is "torn" into smaller particles under the action of the shearing force, and the originally tightly packed substrate layer is decomposed into a fluffy loose granular structure, so as to greatly improve the penetration rate of high-temperature steam, thereby realizing efficient and rapid sterilization operation of the seedling-growing substrate.

[0076] Specifically, as Figure 1 and Figure 2 shown, a feed pipe 71 and a discharge pipe 72 are respectively provided at the top and bottom of the sterilization tank 1. The bottom end of the feed pipe 71 penetrates through the rotating support 3 and is communicated with the inner tank body 11, and the top end of the discharge pipe 72 penetrates through the flange 4 and is communicated with the inner tank body 11.

[0077] During specific implementation, it is convenient for the operator to add the seedling-growing substrate into the inner tank body 11 in the sterilization tank 1 through the feed pipe 71. The bottom end of the feed pipe 71 penetrates through the rotating support 3 to ensure that it will not hinder the rotation of the inner tank body 11. Similarly, through the arrangement of the discharge pipe 72, it is beneficial for the operator to discharge the seedling-growing substrate after high-temperature sterilization, and the top end of the discharge pipe 72 penetrates through the flange 4 and is communicated with the inner tank body 11, which can also ensure that it will not hinder the rotation of the inner tank body 11 during its discharging.

[0078] Embodiment 2;

[0079] As Figures 4 to 5 shown, this embodiment is a further preferred implementation manner of Embodiment 1. Specifically, a groove 5 for installing the steam nozzle 12 is also opened outside the sleeve rod 143 and corresponding to the positions of the steam nozzles 12; further, when the steam nozzle 12 is embedded in the groove 5, the layout mode of its branch pipe 62 is different fromFigure 3 , see details in Figure 4 , Figure 5 and Figure 6 as shown.

[0080] In this embodiment, a groove 5 is opened on the outside of the sleeve rod 143 for installing the steam nozzle 12. The main purpose is to provide basic protection for the steam nozzle 12 to avoid collision damage to the steam nozzle 12 caused by stirring during high-temperature sterilization of the seedling-raising substrate. That is, through the embedded installation of the groove 5, only the nozzle part of the steam nozzle 12 is exposed on the sleeve rod 143, and the rest of the parts are located in the groove 5 and are wrapped by the side wall of the groove 5. This greatly reduces the collision probability between the seedling-raising substrate and the steam nozzle 12, avoids the direct impact of substrate particles on the steam nozzle 12 and causes its damage, so as to realize the long-term normal use of the steam nozzle 12;

[0081] Specifically, when the turning plate 141 is turned downward and inserted into the deep layer of the substrate, it will generate a thrust on the materials accumulated in front of the nozzle, pushing them to both sides or the rear, forming a relatively loose material gap around the steam nozzle 12; when the turning plate 141 is lifted upward to sprinkle the substrate, the lifted substrate diffuses around under the action of gravity and centrifugal force, further clearing the steam jet path of the steam nozzle 12, ensuring that when the steam nozzle 12 ejects high-temperature steam, an "open area" is formed in front of its nozzle, facilitating the rapid diffusion of the high-temperature steam ejected by the steam nozzle 12, so that the high-temperature steam always penetrates evenly into the seedling-raising substrate at a stable flow rate and pressure, ensuring the continuity and uniformity of the sterilization process and improving the sterilization effect.

[0082] In the traditional device, the steam nozzle 12 is often installed naked on the inner wall of the sterilization tank 1 or the surface of the stirring component. When the substrate is stirred at high speed, larger substrate particles (such as vermiculite, perlite) or massive materials are extremely easy to hit the nozzle, resulting in nozzle deformation, interface loosening or even steam leakage, seriously affecting the equipment stability and service life. Moreover, in the traditional sterilization device, since the seedling-raising substrate is piled up in the tank, the seedling-raising substrate will inevitably cover the steam nozzle 12, thereby causing it to be unable to smoothly eject high-temperature steam, and when the ejected high-temperature steam diffuses and penetrates in the seedling-raising substrate, it is hindered to a certain extent, thereby affecting its sterilization effect.

[0083] As the above embodiment, as shown in Figure 5 , in this embodiment, a filter screen 51 is further provided at the opening position of the groove 5.

[0084] It should be understood that in this application, by providing a filter screen 51 at the opening of the groove 5, the filter screen 51 serves as a physical barrier to form a filtering interface at the opening of the groove 5, allowing high-temperature steam (gaseous molecules) to pass through unobstructed while blocking solid impurities from entering the nozzle part of the steam spray group, thereby further preventing particulate or fibrous impurities in the seedling-growing substrate from clogging the steam nozzle 12;

[0085] For example, the aperture of the filter screen 51 can be designed to be 0.5 - 1 mm, and the mesh number of the filter screen 51 can be 60 - 80 meshes to ensure the smooth passage of high-temperature steam, reduce the pressure loss of high-temperature steam, and effectively intercept impurity particles and fibers in the substrate to prevent them from entering the neat nozzle and causing it to clog and unable to be used normally.

[0086] Example 3;

[0087] Further refer to Figure 6 and Figure 7 On the side of the filter screen 51 close to the steam nozzle 12, a cleaning member is further provided. The cleaning member includes a scraper 531 and a brush attached to the side of the scraper 531 corresponding to the filter screen 51. On the two side walls of the groove 5, a sliding mechanism is further provided. The sliding mechanism is configured to drive the scraper 531 and the brush to clean the filter screen 51 when the turning plate 141 is turned up and down;

[0088] Specifically, referring to Figure 6 and Figure 7 The sliding mechanism includes a vertically opened chute 532, a slider 533 slidably disposed inside the chute 532, a spring 534 disposed inside the chute 532 along the length direction of the chute 532 and connected to the slider 533 and the chute 532 at both ends respectively. Each slider 533 is connected to one end corresponding to the scraper 531, and a steel wire rope 535 passing through the wall layer of the sleeve rod 143 is connected to the connecting handle 146 of the turning plate 141 at the upper part of the slider 533.

[0089] It should be noted that during the high-temperature sterilization process, although the filter screen 51 can intercept impurities in the substrate, over time, impurities will still continuously accumulate on one side surface of the filter screen 51 and eventually cause the filter screen 51 to clog, thus affecting the normal spraying of high-temperature steam. Once the filter screen 51 clogs, it requires manual shutdown for cleaning, which not only increases the maintenance cost but also affects the continuous operation of the equipment.

[0090] Therefore, the present application specifically sets up a cleaning member to cooperate with the flipping plate 141 to clean the filter screen 51 and prevent the filter screen 51 from being blocked. That is, when the flipping plate 141 flips up and down, its connecting handle 146 drives the slider 533 to slide in the chute 532 through the wire rope 535. Then, the slider 533 drives the scraper 531 to move up and down. After the scraper 531 moves up and down, the particles in the mesh holes of the filter screen 51 and on the outer surface of the filter screen 51 are cleaned and scraped by the brush, so that the cleaning member can clean the filter screen 51 periodically and frequently during the normal operation of the equipment, thus avoiding the blockage of the filter screen 51 and affecting the spraying and diffusion of high-temperature steam;

[0091] Specifically, the working process is as follows. When the flipping plate 141 is lifted upward, the wire rope 535 is tightened, pulling the slider 533 to move upward in the chute 532 and stretching the spring 534 in the chute 532, so as to prompt the scraper 531 to move upward and clean the filter screen 51 with the brush. When the flipping plate 141 flips downward, the wire rope 535 is relaxed, and the stretched spring 534 pulls the slider 533 to slide downward under the action of the elastic restoring force, and the scraper 531 and the brush scrape downward along the surface of the filter screen 51 to remove the impurities accumulated on the filter screen 51. It can be understood that based on the pushing effect of the flipping plate 141 of the present application on the substrate in front of the filter screen 51, when the flipping plate 141 flips up and down, the substrate particles accumulated on one side close to the surface of the filter screen 51 can be pushed, so that the substrate particles on the surface of the filter screen 51 form loose gaps, further reducing the adhesion amount of impurities on the surface of the filter screen 51 and reducing the cleaning difficulty of the cleaning member;

[0092] Accordingly, for the present application, based on the fact that the cleaning member directly acts on the side of the filter screen 51 close to the steam nozzle 12, it can effectively prevent impurities from entering the steam nozzle 12 and ensure the normal operation of the steam nozzle 12. The filter screen 51 intercepts impurities, and the cleaning member timely cleans the impurities on the filter screen 51. Through the mutual cooperation of the two, an effective protection barrier is formed, reducing the risk of the steam nozzle 12 being blocked, extending the service life of the steam nozzle 12, ensuring that the steam nozzle 12 can stably maintain high-temperature steam spraying during the sterilization process, providing guarantee for the sterilization process of the sterilization device, and improving the sterilization efficiency of the device.

[0093] In addition, it should be further supplemented and explained here that for Embodiment 3, although adding a cleaning mechanism to the high-temperature sterilization device for nursery substrate seemingly increases the structural complexity, this is exactly the necessary technical improvement made by the present application for the pain points in practical applications;

[0094] That is to say, without the cleaning component, impurities such as perlite debris and coconut coir fibers in the seedling-raising substrate will frequently clog the filter screen 51. Based on actual measurements, it is found that in the existing high-temperature steam sterilization device during its continuous operation for 10 days, about 80% of the surface area of the filter screen 51 will be heavily attached with impurities such as perlite debris and coconut coir fibers. As a result, the amount of steam ejected from the steam nozzle 12 is greatly reduced. At this time, manual cleaning is required because after the high-temperature steam ejects from the nozzle and contacts the seedling-raising substrate for sterilization, the moisture in the substrate will evaporate and form some moist gas to assist at the nozzle orifice, which will cause the substrate particles to adhere and block. At this time, manual shutdown for cleaning and maintenance is required, which greatly affects the sterilization efficiency of the device.

[0095] After the cleaning component is added in this application, to a certain extent, the defects of the traditional sterilization device are eliminated. After verification, in the high-temperature steam sterilization device of this application during its continuous operation for 10 days (for the same seedling-raising substrate), only about 15% of the surface area of the filter screen 51 is attached with a small amount of coconut coir fibers, and there is almost no perlite debris. This is because coconut coir fibers are often long and thin, and when they adhere to the surface of the filter screen 51, some will form a winding shape, so it is difficult to achieve thorough cleaning. However, compared with the prior art, the cleaning component in this application utilizes the kinetic energy of the flipping plate 141 to drive, realizing automatic periodic cleaning without additional energy consumption, and transforming the maintenance of the filter screen 51 into a self-maintenance action during the operation of the device, which clearly reflects the creativity of this application.

[0096] Embodiment 4;

[0097] Combined with Figure 8 and Figure 9 As shown, there is a gap between the inner tank body 11 and the sterilization tank 1. A rotating plate 8 is sleeved outside the lower part of the inner tank body 11 and above the power mechanism 2. The rotating sealing plate is rotationally sealed with the outer wall of the inner tank body 11 and the inner wall of the sterilization tank 1 respectively. The rotating plate 8 divides the gap into an annular cavity 81 and a transmission cavity 82 from top to bottom, and the power mechanism 2 is located in the transmission cavity 82;

[0098] Furthermore, a spiral tube 83 fixedly connected to the outer tank body and spirally distributed outside the inner tank body 11 is arranged in the annular cavity 81. One end of the spiral tube 83 passes through the rotating support 3 and extends into the inner tank body 11, while the other end of the spiral tube 83 passes through the sterilization tank 1 and is connected to the high-temperature steam tank 9.

[0099] Through the arrangement of the spiral tube 83, after the high-temperature steam sterilizes the seedling-growing substrate, the steam carrying the waste heat can continue to flow back into the high-temperature steam tank 9 along the spiral tube 83 to realize the recovery of the steam. At the same time, the spiral layout of the spiral tube 83 enables the steam carrying the preheat to form a heat exchange path outside the inner tank body 11, and continuously radiates heat into the inner tank body 11 through the tube wall made of its metal material (such as stainless steel), so as to ensure that the external temperature of the inner tank body 11 is always maintained at an appropriate temperature, thereby preventing the internal temperature of the inner tank body 11 from fluctuating due to heat dissipation, further ensuring the sterilization effect, and realizing the saving of waste heat.

[0100] It should be added that the high-temperature steam in the above embodiments is heated by external heating (electric heating, gas heating or other heat sources) to boil the water into vaporization to form high-temperature steam with controllable pressure and temperature. In actual situations, the steam temperature can reach 121 °C and the pressure is maintained at about 0.1 MPa to effectively kill harmful microorganisms such as germs and insect eggs in the seedling-growing substrate. And this high-temperature steam is transported to the high-temperature steam tank 9 through the external pipeline 6. At the same time, based on the disclosure of this text, for those skilled in the art, setting relevant heating mechanisms in the high-temperature steam tank 9 to maintain the temperature of the high-temperature steam is prior art. Therefore, the specific structure of the high-temperature steam tank 9 will not be described in detail in this application.

[0101] It should be noted that the structures, proportions, sizes, etc. shown in the drawings of this specification are all schematic diagrams, which only serve to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they do not have technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope that the technical content disclosed by the present invention can cover.

[0102] At the same time, the terms such as "upper", "lower", "left", "right", "middle", etc. cited in this specification are only for the convenience of clear narration, and are not used to limit the scope of implementation of the present invention. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope that the present invention can implement.

Claims

1. A high-temperature sterilization device for a seedling substrate, comprising a sterilization tank (1) and a high-temperature steam tank (9), wherein an inner tank body (11) is rotatably provided inside the sterilization tank (1), and a seedling substrate to be sterilized is stored inside the inner tank body (11), characterized in that: Also includes: A sterilization mechanism, the sterilization mechanism being arranged inside the inner tank body (11), and the sterilization mechanism comprising a steam nozzle (12) connected to the high-temperature steam tank (9); A mixing mechanism, the mixing mechanism comprising stirring blades (13) and a turnover assembly, the stirring blades (13) being arranged in an annular array on the inner wall of the inner tank body (11) and being distributed in a spiral shape and inclined, and the turnover assembly being arranged vertically in the middle of the inner tank body (11); A power mechanism (2) is also provided at the bottom of the inner tank body (11), the power mechanism (2) comprising a driving device (21) and a transmission mechanism, the transmission mechanism being located at the output end of the driving device (21) and being in transmission connection with the inner tank body (11), and the driving device (21) being in transmission connection with the turnover assembly; When the steam nozzle (12) sprays high-temperature steam to perform a sterilization operation, the driving device (21) drives the flip assembly to operate, and drives the inner tank body (11) to rotate through the transmission mechanism, thereby driving the stirring blade (13) and the flip assembly to stir and flip the seedling culture medium inside the inner tank body (11).

2. A high temperature sterilization device for seedling culture medium according to claim 1, characterized in that: The flip assembly comprises a flip plate (141) and a motion rod, wherein the flip plate (141) is circumferentially arranged outside the motion rod, and the motion rod comprises a rotating rod (142) and a sleeve rod (143) which are coaxially sleeved and rotatably matched, wherein the bottom end of the rotating rod (142) passes through the inner tank body (11) and is connected to the output end of the driving device (21), and an annular wave groove (143) is provided on the outside of the rotating rod (142) at a position corresponding to each flip plate (141). 44), and a moving block (145) is slidably arranged in the annular wave groove (144), and one end of each of the flip plates (141) is provided with a connecting handle (146) that penetrates into the sleeve rod (143) and is movably connected to the moving block (145), and at the position where the connecting handle (146) penetrates the sleeve rod (143), the connecting handle (146) is ball-connected with the sleeve rod (143) through a ball joint (147), and the ball joint (147) and the connecting handle (146) are slidably matched; When the rotating rod (142) rotates, the sleeve rod (143) remains stationary.

3. A high temperature sterilization device for seedling culture medium according to claim 2, characterized in that: The inner tank body (11) is rotatably connected to the sterilization tank (1) via a rotatable support (3) at the top middle position, and a flange (4) rotatably sealed with the inner tank body (11) is provided at the bottom middle position of the inner tank body (11). The flange (4) is connected to the sleeve rod (143), and a through hole for the rotating rod (142) to pass through is provided in the top middle of the flange (4), and the flange (4) is rotatably sealed with the rotating rod (142) via the through hole.

4. A high temperature sterilization device for seedling culture medium according to claim 2, characterized in that: A plurality of steam nozzles (12) are provided, and are respectively located at positions below the flip plate (141) outside the sleeve rod (143) and are attached to the outside of the sleeve rod (143). The steam nozzles (12) are connected to the high-temperature steam tank (9) via a pipeline (6).

5. A high temperature sterilization device for seedling culture medium according to claim 4, characterized in that: The transmission mechanism comprises a driving gear (221), a transmission gear (222) and a driven gear ring (223) which mesh with each other. The driving gear (221) is sleeved on the outside of the output end of the driving device. The transmission gear (222) is arrayed around the driving gear (221) and connected to the flange (4) and the sterilization tank (1) respectively through gear rods passing through the inside. The driven gear ring (223) is sleeved on the outside of the transmission gear (222) and connected to the bottom edge of the inner tank body (11).

6. A high temperature sterilization device for seedling culture medium according to claim 3, characterized in that: A groove (5) for mounting the steam nozzle (12) is also provided on the outside of the sleeve rod (143) and at a position corresponding to each of the steam nozzles (12).

7. A high temperature sterilization device for seedling culture medium according to claim 6, characterized in that: A filter screen (51) is also provided at the opening of the groove (5).

8. A high temperature sterilization device for seedling culture medium according to claim 7, characterized in that: A cleaning member is also provided on a side of the filter (51) close to the steam nozzle (12), the cleaning member comprising a scraper (531) and a brush attached to a side of the scraper (531) corresponding to the filter (51). A sliding mechanism is also provided on the groove walls on both sides of the groove (5), the sliding mechanism comprising a vertically opened slide groove (532), a slider (533) slidably arranged inside the slide groove (532), and a spring (534) arranged inside the slide groove (532) along the length direction thereof and having two ends respectively connected to the slider (533) and the slide groove (532). Each of the sliders (533) is respectively connected to an end corresponding to the scraper (531), and the upper part of the slider (533) is connected to the connecting handle (146) of the flip plate (141) via a steel wire rope (535) penetrating the wall layer of the sleeve rod (143).

9. A high temperature sterilization device for seedling culture medium according to claim 4, characterized in that: The pipeline (6) comprises a main pipe (61) and multiple branch pipes (62); one end of the main pipe (61) is connected to the high-temperature steam tank (9) and the other end thereof passes through the sterilization tank (1); the multiple branch pipes (62) are arranged in the inner wall layer of the sleeve rod (143), one end of which is connected to the main pipe (61) and the other end of which is respectively connected to the corresponding steam nozzles (12).

10. A high temperature sterilization device for seedling culture medium according to claim 3, characterized in that: A feed pipe (71) and a discharge pipe (72) are provided at the top and bottom of the sterilization tank (1), respectively. The bottom end of the feed pipe (71) passes through the rotating support (3) and is connected to the inner tank body (11), and the top end of the discharge pipe (72) passes through the flange (4) and is connected to the inner tank body (11).

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