Double helix flour killing device

Abstract

The utility model discloses a double helical surface flour disinfecting and killing device belongs to flour sterilization technical field, and this double helical surface flour disinfecting and killing device includes frame, outer tube, inner tube, inner spiral blade, outer spiral blade, drive mechanism and disinfecting and killing system, and the outer tube has the outer circulation cavity, and the outer circulation cavity is connected with the discharge pipe, and the inner tube is located in the outer tube, and the inner tube has the inner circulation cavity, and the inner circulation cavity is connected with the feeding pipe, and the inner tube is equipped with first circulation material mouth and second circulation material mouth, and first circulation material mouth and second circulation material mouth are used for connecting the inner tube and the outer tube, the inner spiral blade is located in the inner circulation cavity, and the outer spiral blade is located in the outer circulation cavity, and the conveying direction of inner spiral blade is opposite with the conveying direction of outer spiral blade, and drive mechanism is used for driving the rotation of inner spiral blade, and disinfecting and killing system is used for supplying ozone to the outer circulation cavity and the inner circulation cavity, the utility model discloses can prolong the residence time of flour, and then improve the sterilization efficiency of flour.

Description

Technical Field

[0001] This utility model relates to the field of flour sterilization technology, and in particular to a double-helix flour sterilization device. Background Technology

[0002] During flour production, storage, and transportation, microbial contamination such as mold and bacteria, as well as pest infestation, are significant issues affecting flour quality and safety. Existing flour disinfection equipment often employs a single-cylinder structure, resulting in a limited flow path for the flour during disinfection. This can lead to incomplete disinfection in some areas, while other areas may be overexposed to disinfectants, affecting quality. Therefore, this equipment is ill-suited for continuous production needs. Utility Model Content

[0003] The purpose of this utility model is to solve at least one of the technical problems existing in the prior art. To this end, this utility model proposes a double-helix flour sterilization device, which can realize the circulation of flour, improve sterilization efficiency, and thus adapt to the needs of continuous production.

[0004] The double-helix flour sterilization device according to an embodiment of the present invention includes a frame; an outer cylinder, which is vertically mounted on the frame and has an outer circulation chamber connected to a discharge pipe; and an inner cylinder, which is coaxially mounted inside the outer cylinder and has an inner circulation chamber connected to a feed pipe. The inner cylinder has a first circulation port and a second circulation port. The first circulation port is located at the end of the inner cylinder away from the feed pipe, and the second circulation port is located on one side of the feed pipe. The first and second circulation ports are configured to communicate with the inner cylinder. The machine consists of an inner and outer cylinder; an inner spiral blade, coaxially mounted in the inner circulation chamber; an outer spiral blade, coaxially mounted in the outer circulation chamber, with the outer and inner spiral blades connected by a drive mechanism, the outer spiral blade being sleeved on the outer wall of the inner cylinder, and the conveying direction of the inner spiral blade being opposite to that of the outer spiral blade; a drive mechanism, connected to the inner spiral blade, used to drive the inner spiral blade to rotate; and a sterilization system, mounted on the frame, used to sterilize the flour in both the outer and inner circulation chambers.

[0005] The double-helix flour sterilization device according to the present invention has at least the following beneficial effects: Flour enters the inner circulation chamber from the feed pipe, and is pushed by the inner spiral blade to the first circulation port to enter the outer circulation chamber. The outer spiral blade then sends the flour back to the inner circulation chamber from the second circulation port in the opposite direction, forming a closed circulation path. At the same time, the sterilization system continues to work in the inner and outer circulation chambers, so that the material is fully sterilized during the circulation process, and uniform sterilization is completed. Thus, the bidirectional circulation process of the material is realized through the coaxial design of the inner and outer double cylinders and the reverse transmission. This bidirectional circulation system allows the flour to repeatedly pass through the sterilization area, prolonging the residence time of the flour. At the same time, the turbulence effect generated by the reverse movement of the inner and outer spiral blades enhances the flour sterilization efficiency, improves the oxidation uniformity, and thus improves the sterilization efficiency of the flour.

[0006] According to some embodiments of the present invention, the first circulation port is located below the second circulation port.

[0007] According to some embodiments of the present invention, the inner spiral blade and the outer spiral blade are connected by a planetary gear set. The driving mechanism is located at one end of the inner spiral blade, and the planetary gear set is located at the end of the inner spiral blade away from the driving mechanism. The planetary gear set is used to drive the inner spiral blade and the outer spiral blade to rotate in opposite directions.

[0008] According to some embodiments of this utility model, the pitch of the inner helical blade is smaller than the pitch of the outer helical blade.

[0009] According to some embodiments of the present invention, the input end of the discharge pipe is located between the first circulation port and the second circulation port.

[0010] According to some embodiments of the present invention, the disinfection system is an ozone supply system, which is mounted on a frame. Both the external circulation chamber and the internal circulation chamber are connected to the ozone supply system, which is used to supply ozone to the external circulation chamber and the internal circulation chamber.

[0011] According to some embodiments of this utility model, the outer circulation chamber is connected to the discharge pipe through the discharge gate, and the inner circulation chamber is connected to the feed pipe through the inlet gate.

[0012] According to some embodiments of this utility model, the ozone supply system includes: an ozone generator mounted on a frame, which supplies ozone to the inner circulation cavity through an inner porous ozone distribution pipe arranged axially along the inner circulation cavity and to the outer circulation cavity through an outer porous ozone distribution pipe arranged axially along the outer circulation cavity; an ozone concentration sensor evenly distributed on the cavity walls of the outer and inner circulation cavities, used to monitor the ozone concentration in the inner and outer circulation cavities in real time; and a gas circulation fan connected to the outer circulation cavity, the inner porous ozone distribution pipe, and the outer porous ozone distribution pipe, used to provide airflow circulation to eliminate the ozone concentration gradient.

[0013] According to some embodiments of this utility model, it also includes a temperature regulating mechanism, which is connected to the inner cylinder and is installed on the wall of the inner cylinder. The temperature regulating mechanism is used to regulate the temperature in the outer circulation chamber and the inner circulation chamber to improve the sterilization effect of ozone.

[0014] According to some embodiments of this utility model, the disinfection system is an ultraviolet system, which is mounted on a frame and configured to kill microorganisms by irradiating the flour in the outer and inner circulation chambers with ultraviolet light.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0017] Figure 1 This is a schematic diagram of the structure of the double-helix flour sterilization device according to an embodiment of the present invention;

[0018] Figure 2 for Figure 1 Cross-sectional view of the image.

[0019] Figure label:

[0020] 100 racks;

[0021] Outer cylinder 200, external circulation chamber 210, discharge gate 220, discharge pipe 230;

[0022] Inner cylinder 300, inner circulation chamber 310, feed gate 320, first circulation port 330, second circulation port 340, feed pipe 350, planetary gear set 360;

[0023] Internal spiral blade 400, drive shaft 410;

[0024] External spiral blade 500;

[0025] Drive mechanism 600;

[0026] Ozone supply system 700, ozone generator 710, gas circulation fan 720, nozzle 730. Detailed Implementation

[0027] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If the description mentions "first" or "second," it is merely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features or the sequential relationship between indicated technical features.

[0029] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0030] refer to Figures 1 to 2 This embodiment discloses a double-helix flour disinfection device.

[0031] like Figures 1 to 2As shown, the double-helix flour sterilization device includes a frame 100; an outer cylinder 200, which is vertically mounted on the frame 100 and has an outer circulation chamber 210 connected to a discharge pipe 230; and an inner cylinder 300, which is coaxially mounted inside the outer cylinder 200 and has an inner circulation chamber 310 connected to a feed pipe 350. The inner cylinder 300 has a first circulation port 330 and a second circulation port 340. The first circulation port 330 is located at the end of the inner cylinder 300 away from the feed pipe 350, and the second circulation port 340 is located on one side of the feed pipe 350. The first circulation port 330 and the second circulation port 340 are configured to communicate with each other. The machine comprises an inner cylinder 300 and an outer cylinder 200; an inner spiral blade 400, coaxially arranged in the inner circulation cavity 310; an outer spiral blade 500, coaxially arranged in the outer circulation cavity 210, the outer spiral blade 500 and the inner spiral blade 400 being connected by a drive mechanism, the outer spiral blade 500 being sleeved on the outer wall of the inner cylinder 300, and the conveying direction of the inner spiral blade 400 being opposite to that of the outer spiral blade 500; a drive mechanism 600, connected to the inner spiral blade 400, used to drive the inner spiral blade 400 to rotate; and a sterilization system, located on the frame, used to sterilize the flour in the outer circulation cavity 210 and the inner circulation cavity 310.

[0032] like Figure 1 and Figure 2 As shown, both the inner cylinder 300 and the outer cylinder 200 are arranged horizontally. The inner cylinder 300 passes through the outer cylinder 200. The inner cylinder 300 is provided with an inner spiral blade 400, and the outer cylinder 200 is provided with an outer spiral blade 500. The feed pipe 350 is located at one end of the inner cylinder 300, passes through the outer cylinder 200 and is connected to the inner cylinder 300. The discharge pipe 230 is connected to the outer cylinder 200. Specifically, the first circulation port 330 is located on one side of the feed pipe 350, and the first circulation port 330 and the second circulation port 340 are respectively located at opposite ends of the inner cylinder 300. During operation, flour enters the inner circulation chamber 310 through the feed pipe 350 and is pushed by the inner spiral blade 400 to the first circulation port 330, where it enters the outer circulation chamber 210. The outer spiral blade 500 then sends the flour back to the inner circulation chamber 310 from the second circulation port 340 in the opposite direction, forming a closed circulation path. At the same time, the sterilization system continuously operates in both the inner and outer circulation chambers, ensuring that the material is thoroughly sterilized during the circulation process, achieving uniform sterilization. Thus, the coaxial design of the inner and outer double cylinders and the reverse transmission realize the bidirectional circulation of the material. This bidirectional circulation system allows the flour to repeatedly pass through the sterilization area, extending the flour's residence time. Meanwhile, the turbulence effect generated by the reverse movement of the inner and outer spiral blades enhances the flour sterilization efficiency, improves oxidation uniformity, and thus improves the flour sterilization efficiency.

[0033] In this specific embodiment, the drive mechanism 600 is a servo motor, which is connected to the inner rotating blade 400 via a drive shaft 410.

[0034] In some specific embodiments of this utility model, the first circulation port 330 is located below the second circulation port 340. For example... Figure 2 As shown, setting the first circulation port 330 below the second circulation port 340 can optimize the circulation flow path of flour between the inner and outer cylinders, ensuring that the flour can form a more reasonable dynamic circulation during the sterilization process.

[0035] In some specific embodiments of this utility model, the inner helical blade 400 and the outer helical blade 500 are connected by a planetary gear set 360. The driving mechanism 600 is located at one end of the inner helical blade 400, and the planetary gear set 360 is located at the end of the inner helical blade 400 away from the driving mechanism 600. The planetary gear set 360 is used to drive the inner helical blade 400 and the outer helical blade 500 to rotate in opposite directions.

[0036] like Figure 2 As shown, the planetary gear set 360 is located at the right end of the inner cylinder 300, and the drive mechanism 600 is located at the left end of the outer cylinder 200. The drive mechanism 600 passes through the outer cylinder 200 and is connected to the inner helical blade 400 in the inner cylinder 300. Specifically, the sun gear is fixedly mounted on the end journal of the inner helical blade 400, and the gear ring is rigidly connected to the drive end of the outer helical blade 500 through a flange. Three planetary gears are evenly distributed between the sun gear and the gear ring and supported by a planet carrier. When the drive mechanism 600 drives the inner helical blade 400 and the sun gear to rotate, the planetary gears, while revolving around the sun gear, push the gear ring to rotate in the opposite direction, thereby driving the outer helical blade 500 to achieve the opposite direction of movement. On the one hand, using the planetary gear set 360 for transmission can ensure that the inner and outer helical blades 500 strictly maintain opposite conveying directions, forming a forced circulating material flow. At the same time, the planetary gear set 360 can be adapted to the coaxial nested cylinder layout between the inner cylinder 300 and the outer cylinder 200. On the other hand, the reverse-rotating threaded rod generates a shearing and mixing effect, which not only enhances the material circulation efficiency but also allows ozone to come into more complete contact with the material, thereby improving the sterilization efficiency of the flour.

[0037] In some specific embodiments of this invention, the pitch of the inner spiral blade 400 is smaller than that of the outer spiral blade 500. This differentiated pitch, achieved by adjusting the conveying rates of the inner and outer cylinders 200, optimizes the match between reaction depth and processing throughput. This creates a denser material pushing effect in the inner circulation chamber 310, thereby increasing the residence time and mixing intensity of the material in the inner cylinder 300. Specifically, since the inner cylinder 300 typically serves as the main reaction zone, a smaller pitch enhances the contact efficiency between the material and ozone, ensuring sufficient oxidation or reaction. Conversely, a larger pitch in the outer cylinder 200 accelerates material circulation, balancing overall processing efficiency.

[0038] In some specific embodiments of this utility model, the input end of the discharge pipe 230 is located between the first circulation port 330 and the second circulation port 340 to optimize the material discharge logic and ensure that the material that has undergone sufficient circulation processing enters the discharge pipe 230 first.

[0039] Specifically, such as Figure 2 As shown, the feed pipe 350, the second circulation port 340, and the discharge pipe 230 are arranged sequentially in the vertical direction. The second circulation port 340 is located at the upper end of the inner cylinder 300, and the discharge pipe 230 is located between the first circulation port 330 and the second circulation port 340. This arrangement ensures that the flour is intercepted and discharged before it re-enters the inner circulation chamber 310 after completing the sterilization process, preventing insufficiently processed material from short-circuiting out. Simultaneously, this position is precisely at the end of the pushing direction of the outer spiral blade 500, allowing for smooth discharge using the natural pressure of the threaded conveyor. This ensures that the material must complete at least one complete internal and external circulation before being discharged, guaranteeing processing quality, and also prevents excessive accumulation of material in the outer cylinder 200.

[0040] In some specific embodiments of this utility model, the ozone supply system 700 includes an ozone generator 710, an ozone concentration sensor, and a gas circulation fan 720. The ozone generator 710 is mounted on a frame 100. The ozone generator 710 supplies ozone to the inner circulation cavity 310 through an inner porous ozone distribution pipe arranged axially along the inner circulation cavity 310, and supplies ozone to the outer circulation cavity 210 through an outer porous ozone distribution pipe arranged axially along the outer circulation cavity 210. The ozone concentration sensor is uniformly distributed on the cavity walls of the outer circulation cavity 210 and the inner circulation cavity 310, and is used to monitor the ozone concentration in the inner and outer circulation cavities in real time. The gas circulation fan 720 is connected to the outer circulation cavity 210, the inner porous ozone distribution pipe, and the outer porous ozone distribution pipe, and is used to provide airflow circulation to eliminate ozone concentration gradients.

[0041] In some specific embodiments of this utility model, the outer circulation chamber 210 is connected to the discharge pipe 230 through the discharge gate 220, and the inner circulation chamber 310 is connected to the feed pipe 350 through the feed gate 320. The outer cylinder 200 and the inner cylinder 300 form a closed cavity. After ozone is injected through the ozone supply system 700, it comes into full contact with the flour in the inner and outer circulation chambers. At the same time, dynamic sealing is achieved through spiral conveying, which improves the contact efficiency with ozone and thus improves the sterilization efficiency of the flour.

[0042] Specifically, the inner porous ozone distribution tube is made of stainless steel, with nozzles 730 on the holes releasing ozone at a spacing of 50mm. The outer porous ozone distribution tube is made of the same material, with nozzles 730 on the holes releasing ozone at a spacing of 80mm. A gas circulation fan 720 is connected to the air inlet of both the outer and inner porous ozone distribution tubes via PVC pipes, forming a closed loop along the fan, the outer and inner porous ozone distribution tubes, the internal circulation chamber 310 and the external circulation chamber 210, and the fan. Ozone concentration sensors are installed on the walls of the internal circulation chamber 310 and the external circulation chamber 210, evenly distributed at a density of one sensor per square meter of chamber wall. This allows the real-time monitoring data from the ozone concentration sensors to be transmitted to the PLC control system, which then feeds back to the ozone generator 710 for power adjustment, forming a highly efficient ozone treatment platform. It should be noted that the ozone supply system 700 is a conventional technical means, and its working principle and structure will not be described in detail here.

[0043] Therefore, by using a porous distribution pipe for axial air distribution combined with a gas circulation fan 720 for forced convection, ozone is uniformly distributed in three dimensions in the inner and outer circulation chambers 210, ensuring sufficient contact between ozone and materials. Furthermore, the gas circulation fan 720 can effectively eliminate the concentration gradient within the chamber by establishing airflow circulation, avoiding local ozone concentrations that are insufficient or excessive, and ensuring that all parts of the flour receive a consistent ozone exposure.

[0044] In some specific embodiments of this utility model, a temperature regulating mechanism is also included. The temperature regulating mechanism is connected to the inner cylinder 300 and is covered on the wall of the inner cylinder 300. The temperature regulating mechanism is used to regulate the temperature in the outer circulation chamber 210 and the inner circulation chamber 310 to improve the sterilization effect of ozone.

[0045] It should be noted that the optimal temperature range for ozone sterilization is typically between 25℃ and 40℃. Therefore, automatically adjusting the temperature according to the characteristics of different materials to avoid ozone decomposition caused by high temperatures while overcoming the poor sterilization effect at low temperatures is an effective way to improve ozone sterilization efficiency. Therefore, using an electric heating jacket or circulating water jacket to directly apply heat to the 300mm wall of the inner cylinder, and uniformly regulating the flour temperature through heat conduction, allows ozone to exert its sterilization effect within the optimal temperature range.

[0046] Specifically, taking the circulating water jacket as an example, it adopts a double-layer stainless steel cylinder structure. The inner layer is the material contact surface, and the outer layer is the jacket shell. An 8-12mm water flow channel is formed between the two layers. The inlet and outlet are arranged diagonally, i.e., water enters from the bottom and exits from the top. A closed-loop temperature control system is formed by an external variable frequency circulating pump and a plate heat exchanger. With the help of a controller, the water temperature can be accurately controlled within ±0.5℃. Furthermore, spiral guide vanes are distributed inside the jacket to force the water flow to spiral along the cylinder axis, thereby eliminating temperature dead zones. It should be noted that the circulating water jacket is a common temperature control system and a conventional technical means. Its working principle and structure will not be further elaborated here.

[0047] Of course, the disinfection system can also be an ultraviolet (UV) system installed on the rack 100. Specifically, UV lamps are installed on the walls or central axis of the inner cylinder 300 and outer cylinder 200 to directly irradiate the flowing flour. Furthermore, quartz glass windows or UV-transparent material are used to cover the lamps to prevent flour contamination of the lamp surface. The flour circulates through the reverse conveying of the inner spiral blades 400 and outer spiral blades 500, repeatedly passing through the UV irradiation area to compensate for the insufficient penetration depth of UV light.

[0048] The following describes the double-helix flour sterilization device using a specific embodiment of the flour ozone sterilization method.

[0049] The initial parameters, preset feed amount and feed flow rate of the flour are obtained. The control module sets the ozone concentration threshold range, temperature control range and sterilization time based on the initial parameters and preset feed amount.

[0050] The control module responds to the first adjustment signal and determines the first rotation speed of the inner spiral blade 400 according to the preset feed amount and the second rotation speed of the inner spiral blade 400 according to the feed flow rate, so that the feed gate 320 monitors the pre-accumulation amount of flour in the feed pipe 350 in real time.

[0051] When the control module detects that the pre-accumulation amount has reached the preset feeding amount, the control module will change the feeding gate 320 from the closed state to the open state;

[0052] When the feed gate 320 changes from the closed state to the open state, the control module synchronously adjusts the rotation speed of the inner spiral blade 400 to the second rotation speed to drive the preset amount of flour into the inner circulation chamber 310.

[0053] When the feed gate 320 is closed, the control module controls the rotation speed of the inner spiral blade 400 to switch from the second rotation speed to the first rotation speed according to the second adjustment signal. The control module controls the ozone supply generator to inject ozone into the inner circulation chamber 310 and the outer circulation chamber 210 according to the third adjustment signal.

[0054] The control module obtains real-time feedback data from the ozone concentration sensor and adjusts the output power of the ozone generator 371 based on the real-time feedback data to stabilize the ozone concentration within the ozone concentration threshold range.

[0055] The sterilization completion rate is determined based on the preset sterilization time. When the sterilization time reaches the preset duration and the ozone concentration is within the ozone concentration threshold range, the gas circulation fan 720 replaces the residual gas in the external circulation chamber 210 and the internal circulation chamber 310 with the exhaust gas processor.

[0056] Open the discharge gate 220 to allow the sterilized flour to be discharged through the discharge pipe 230.

[0057] Specifically, the initial parameters of the flour include flour type, moisture content, microbial load, and particle size, so that the control module can optimize the sterilization strategy based on the initial parameters and ensure that the ozone dosage matches the flour characteristics.

[0058] Specifically, the control module responds to the first adjustment signal and determines the first rotation speed of the inner spiral blade 400 based on the preset feed amount. The first rotation speed is a low-speed feeding mode. When the feed gate 320 is closed and the centralized sterilization process begins, the low-speed operation extends the residence time of the flour in the circulation chamber, ensuring sufficient contact between ozone and flour particles to achieve the ideal sterilization effect. Simultaneously, low-speed operation reduces airflow disturbance, preventing flour from flying or unevenly distributing, ensuring the uniformity and stability of sterilization. The second rotation speed of the inner spiral blade 400 is adjusted according to the real-time feed flow rate. The second rotation speed is a high-speed feeding mode. When the feed gate 320 is open and the centralized feeding process begins, the control module controls the drive mechanism 600 to switch the inner spiral blade 400 to the high-speed second rotation speed, quickly conveying the preset feed amount of flour to the inner circulation chamber 310, significantly shortening the feeding time and improving overall production efficiency. Furthermore, high-speed operation generates a stronger material pushing force, effectively preventing blockage of the feed pipe 350 and ensuring continuous and stable material entry into the processing chamber.

[0059] Specifically, to accurately monitor the pre-accumulation of flour in the feed pipe 350, a weighing sensor is installed on the discharge gate 220 to prevent overfeeding or underfeeding due to excessive feeding speed. When the flour accumulation reaches the preset feeding amount, the system first monitors the flour accumulation in the feed pipe 350 in real time through the weighing sensor and transmits the data to the control module for comparison and analysis. Once the control module confirms that the preset feeding amount has been reached, it immediately sends a stop command to the upstream feeding equipment to ensure that no new flour enters the feed pipe 350. Subsequently, the control module sends an opening signal to the inlet gate 320, which changes from a closed state to an open state. At the same time, the inlet gate 320 feeds back the open state to the control module. After the inlet gate 320 is fully open, the drive mechanism 600 drives the inner spiral blade 400 to automatically switch to the preset high-speed feeding mode to accelerate the flour conveying speed. Once the weighing sensor confirms that the flour in the feed pipe 350 is completely emptied, the control module immediately closes the feed gate 320 and adjusts the speed of the inner spiral blade 400 to a low-speed feeding mode.

[0060] Furthermore, as the flour falls into the inner circulation chamber 310, the gas circulation fan 720 releases a low-pressure airflow to assist the flour flow, and the vibrator installed on the feed pipe 350 operates briefly for 3 to 5 seconds to prevent the flour from sticking to the wall.

[0061] Furthermore, the feed gate 320 is equipped with a photoelectric sensor. During the feeding process, the photoelectric sensor continuously monitors the flow state of the flour. When the photoelectric sensor detects that the pre-accumulated amount of flour in the feed pipe 350 has not been completely emptied within a preset time, the control module responds to the fourth adjustment signal and controls the drive mechanism 600 to increase the rotation speed of the inner spiral blade 400 by 10%.

[0062] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A double-helix flour disinfection device, characterized in that, include: Rack (100); An outer cylinder (200) is mounted on the frame (100). The outer cylinder (200) has an external circulation chamber (210) that is connected to a discharge pipe (230). An inner cylinder (300) is coaxially disposed inside the outer cylinder (200). The inner cylinder (300) has an inner circulation cavity (310) that is connected to a feed pipe (350). The inner cylinder (300) has a first circulation port (330) and a second circulation port (340). The first circulation port (330) is located at the end of the inner cylinder (300) away from the feed pipe (350), and the second circulation port (340) is located on one side of the feed pipe (350). The first circulation port (330) and the second circulation port (340) are configured to connect the inner cylinder (300) and the outer cylinder (200). An inner helical blade (400) is coaxially disposed in the inner circulation cavity (310); An outer spiral blade (500) is coaxially disposed in the outer circulation cavity (210). The outer spiral blade (500) and the inner spiral blade (400) are connected in a transmission manner. The outer spiral blade (500) is sleeved on the outer wall of the inner cylinder (300). The transmission direction of the inner spiral blade (400) is opposite to that of the outer spiral blade (500). A drive mechanism (600) is connected to the inner helical blade (400) and is used to drive the inner helical blade (400) to rotate. The disinfection system is located on the frame and is used to disinfect and sterilize the flour in the outer circulation chamber (210) and the inner circulation chamber (310).

2. The double-helix flour sterilization device according to claim 1, characterized in that, The first circulation port (330) is located below the second circulation port (340).

3. The double helical flour disinfestation apparatus of claim 1, wherein, The inner helical blade (400) and the outer helical blade (500) are connected by a planetary gear set (360). The drive mechanism (600) is located at one end of the inner helical blade (400), and the planetary gear set (360) is located at the end of the inner helical blade (400) away from the drive mechanism (600). The planetary gear set (360) is used to drive the inner helical blade (400) and the outer helical blade (500) to rotate in opposite directions.

4. The double helical floor disinfecting and killing device of claim 1, wherein, The pitch of the inner helical blade (400) is smaller than the pitch of the outer helical blade (500).

5. The double helical floor disinfecting and decontaminating device of claim 1, wherein, The input end of the discharge pipe (230) is located between the first circulation port (330) and the second circulation port (340).

6. The double helical floor disinfecting and decontaminating device of claim 1, wherein, The disinfection system is an ozone supply system (700), which is mounted on the frame (100). The external circulation chamber (210) and the internal circulation chamber (310) are both connected to the ozone supply system (700). The ozone supply system (700) is used to supply ozone to the external circulation chamber (210) and the internal circulation chamber (310).

7. The twin-spiral flour decontamination device of claim 6, wherein, The outer circulation chamber (210) is connected to the discharge pipe (230) through the discharge gate (220), and the inner circulation chamber (310) is connected to the feed pipe (350) through the feed gate (320).

8. The double-helix flour sterilization device according to claim 7, characterized in that, The ozone supply system (700) includes: An ozone generator (710) is mounted on the frame (100). The ozone generator (710) supplies ozone to the inner circulation chamber (310) through an inner porous ozone distribution pipe arranged axially along the inner circulation chamber (310) and supplies ozone to the outer circulation chamber (210) through an outer porous ozone distribution pipe arranged axially along the outer circulation chamber (210). An ozone concentration sensor is uniformly distributed on the walls of the outer circulation chamber (210) and the inner circulation chamber (310). The ozone concentration sensor is used to monitor the ozone concentration in the inner circulation chamber (310) and the outer circulation chamber (210) in real time. A gas circulation fan (720) is connected to the outer circulation chamber (210), the gas circulation fan (720) is connected to the inner porous ozone distribution pipe, and the gas circulation fan (720) is connected to the outer porous ozone distribution pipe. The gas circulation fan (720) is used to provide airflow circulation to eliminate the ozone concentration gradient.

9. The twin-screw flour disinfestation apparatus of claim 1, wherein, It also includes a temperature regulating mechanism, which is connected to the inner cylinder (300) and is covered on the wall of the inner cylinder (300). The temperature regulating mechanism is used to regulate the temperature in the outer circulation chamber (210) and the inner circulation chamber (310) to improve the sterilization effect of ozone.

10. The twin-screw flour disinfestation apparatus of claim 1, wherein, The disinfection system is an ultraviolet (UV) system, which is mounted on the frame (100). The UV system is configured to kill microorganisms by irradiating the flour in the outer circulation chamber (210) and the inner circulation chamber (310) with UV light.

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