Drying system for processing instant vermicelli

Abstract

The drying system comprises a lifting conveying belt, a drying tower, a transfer conveying belt and a plate heat exchanger, one end of the lifting conveying belt extends to the top end of the drying tower and is aligned with a feeding port in the top end of the drying tower, a discharging port is formed in the bottom end of the drying tower, and the discharging port right faces the transfer conveying belt; a plurality of blocking discs are arranged in the drying tower and divide the drying tower into a plurality of drying cavities, and air inlet pipes and air outlet pipes are installed at the positions, corresponding to the drying cavities in height, of the drying tower. A blanking opening is formed in the blocking disc, rotating push plates are arranged on the blocking disc, and the multiple rotating push plates rotate synchronously. The high-temperature quick-drying cavity and the low-temperature drying cavity are matched, a large amount of water is quickly evaporated at the early stage through high temperature, and the drying efficiency is improved; the low temperature is used in the later period to avoid excessive drying of the surface and energy waste, drying efficiency and energy conservation are both considered, and the energy utilization rate can be optimized by adjusting the number of the two.

Description

Technical Field

[0001] The invention relates to the technical field of instant vermicelli processing, and in particular to a drying system for instant vermicelli processing. Background Art

[0002] In the process of instant vermicelli processing, drying is a key link, and its effect directly affects the quality and production efficiency of instant vermicelli. At present, the traditional instant vermicelli drying system has some shortcomings.

[0003] On the one hand, some drying systems use a single temperature for drying and are unable to reasonably adjust the drying temperature according to the moisture content of vermicelli at different stages, resulting in slow evaporation of moisture in the initial stage of drying, consuming a lot of time and energy. In the later stage, the vermicelli surface may become overly dry or even burnt due to excessive temperature, while the internal moisture is not fully discharged, affecting product quality.

[0004] On the other hand, some drying systems are not rational in heat utilization, and the waste heat discharged during the high-temperature stage is not effectively recycled, resulting in energy waste.

[0005] In addition, during the transmission of vermicelli, the existing system may have inaccurate delivery, which may easily cause vermicelli cakes to accumulate in the drying equipment, affecting the drying effect and the normal operation of the equipment. It may also cause material accumulation during subsequent transportation, which is not conducive to subsequent processing and packaging. Therefore, in order to overcome these defects of the prior art, improve the processing quality and production efficiency of instant vermicelli, and reduce energy consumption, it is necessary to design a more reasonable, efficient, and energy-saving drying system for instant vermicelli processing. Summary of the invention

[0006] In order to solve the problems mentioned in the above background technology, the present invention provides a drying system for processing instant vermicelli.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions: A drying system for processing instant vermicelli, comprising a lifting conveyor belt, a drying tower, a transfer conveyor belt and a plate heat exchanger, wherein one end of the lifting conveyor belt extends to the top of the drying tower and is aligned with a feed port at the top of the drying tower, a discharge port is arranged at the bottom of the drying tower, and the discharge port faces the transfer conveyor belt, a plurality of barrier plates are arranged inside the drying tower, the barrier plates divide the drying tower into a plurality of drying chambers, and an air inlet pipe and an air outlet pipe are installed at a height corresponding to each drying chamber on the drying tower; A material drop opening is provided on the barrier disk, and a rotating push plate is provided on the barrier disk, a plurality of rotating push plates rotate synchronously, and the positions of the material drop openings on the upper and lower adjacent barrier disks are staggered at equal angles from top to bottom; The drying chambers are respectively a high-temperature quick-drying chamber and a low-temperature drying chamber, and the high-temperature quick-drying chamber is close to the feed inlet, and the low-temperature drying chamber is close to the discharge outlet; The plate heat exchanger is used to recover the hot air discharged from the high-temperature quick-drying chamber for preheating, and to perform auxiliary heating on the intake air of the low-temperature drying chamber.

[0008] Preferably, the plate heat exchanger includes a first gas inlet, a second gas inlet, a first gas outlet and a second gas outlet, the first gas inlet is connected to the air outlet pipe corresponding to the high-temperature quick-drying chamber through a pipeline, the second gas inlet is connected to a hot air blower that generates low-temperature hot air, and the second gas outlet is connected to the air inlet pipe corresponding to the low-temperature drying chamber through a pipeline.

[0009] Preferably, a laser switch device is provided at one end of the lifting conveyor belt close to the feed port at the top of the drying tower, and the laser switch device includes a laser generating module and a laser receiving module.

[0010] Preferably, a vertical rotating shaft is rotatably installed in the drying tower, the vertical rotating shaft movably passes through a plurality of barrier discs, and a plurality of rotating push plates are fixed on the outside of the vertical rotating shaft.

[0011] Preferably, a drive box is fixed to the top of the drying tower, a rotating motor and a motor reducer are installed in the drive box, a first bevel gear is fixed to the output end of the motor reducer, the top of the vertical rotating shaft extends to the outside of the drying tower and is fixed with a second bevel gear, and the first bevel gear is meshed with the second bevel gear.

[0012] Preferably, the bottom end of the vertical rotating shaft extends to the outside of the drying tower and is fixed with a first spur gear, which is an incomplete gear. A power input shaft is provided on the power box of the transfer conveyor belt, and a second spur gear is fixed to the top of the power input shaft. The diameter of the second spur gear is smaller than that of the first spur gear, and the two are meshed.

[0013] Preferably, a flip feeder is fixed at the bottom end of the blocking plate corresponding to the feed outlet, a first inclined guide plate is provided near the top end of the flip feeder, a second inclined guide plate is provided near the bottom end of the flip feeder, a vertical guide portion is provided between the first inclined guide plate and the second inclined guide plate, and the first inclined guide plate and the second inclined guide plate are symmetrically arranged up and down.

[0014] Preferably, a conical raised slope is provided at the top of the blocking disc, an arcuate bent portion is provided at one end of the rotating push plate directly above the conical raised slope, and a side of the arcuate bent portion facing the rotating direction of the rotating push plate is a convex surface.

[0015] Preferably, one end of the air inlet pipe extending into the drying chamber is connected to the gas distribution ring pipe, and a plurality of gas nozzles are installed on the gas distribution ring pipe.

[0016] Preferably, the gas nozzles are evenly distributed in a circular shape on the gas distribution ring tube, and the gas nozzles are bent downward and face the inside of the baffle plate close to the edge.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. High-efficiency drying and energy-saving: The combination of high-temperature quick-drying chamber and low-temperature drying chamber is adopted. In the initial stage, high temperature is used to quickly evaporate a large amount of water to improve the drying efficiency; low temperature is used in the later stage to avoid excessive surface drying and energy waste, taking into account both drying efficiency and energy saving. By adjusting the number of the two, the energy utilization rate can be optimized. At the same time, the plate heat exchanger can recover the waste heat of the hot air discharged from the high-temperature quick-drying chamber, and assist in heating the air intake of the low-temperature drying chamber, further improving the heat utilization rate, saving energy and protecting the environment.

[0018] 2. Stable and reliable operation: The laser switch device at the feeding port at the top of the drying tower near the lifting conveyor belt can ensure that only one vermicelli cake is put in at a time to prevent accumulation in the barrier plate and block the feeding port, making the system operation more stable.

[0019] 3. Ensure orderly transportation of materials: The vertical rotating shaft in the drying tower pushes the material by rotating the push plate, and the incomplete gear at the bottom of the vertical rotating shaft meshes with the spur gear on the power box of the transfer conveyor belt, which can drive the transfer conveyor belt to operate intermittently, and the transportation frequency matches the speed of the power input shaft, preventing the vermicelli cakes from piling up on the transfer conveyor belt, facilitating subsequent processing and packaging.

[0020] 4. Good drying effect: The flip feeder at the bottom of the barrier plate can make the vermicelli cake turn one side up every time it passes, so that the heating is more evenly distributed; the conical raised slope at the top of the barrier plate and the arc-shaped bent part of the rotating push plate can ensure that the vermicelli cake moves to the edge of the barrier plate and slides into the feeding port; the gas distribution ring pipe and gas nozzle connected to the air inlet pipe blow air directly to the vermicelli cake moving at the edge of the barrier plate to improve the drying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is a front view of the coordination relationship between the lifting conveyor belt and the drying tower of the present invention; Figure 2 It is a front view of the plate heat exchanger of the present invention; Figure 3 It is a three-dimensional diagram of the plate heat exchanger of the present invention; Figure 4It is a three-dimensional diagram of the coordination relationship between the lifting conveyor belt and the drying tower of the present invention; Figure 5 for Figure 4 A zoomed-in detail of position A in the middle; Figure 6 It is a cross-sectional view of a drying tower of the present invention; Figure 7 for Figure 6 Enlarged detail of position B in the middle; Figure 8 This is a schematic diagram of the distribution of barrier disks inside the drying tower of the present invention; Fig. 9 for Figure 8 Enlarged detail image of the middle C position; Fig.10 This is an enlarged detail view of the barrier disc of the present invention from the main perspective; Fig.11 This is an enlarged detail view of the barrier disc of the present invention from a top view; Fig.12 This is an enlarged detail view of the oblique upper view of the barrier of the present invention; In the figure: 1. lifting conveyor belt; 101. laser generating module; 102. laser receiving module; 2. drying tower; 201. feeding port; 202. discharge port; 203. vertical rotating shaft; 2031. second bevel gear; 2032. first straight gear; 2033. rotating push plate; 2034. arc-shaped bending part; 204. air outlet pipe; 3. transfer conveyor belt; 301. power box; 302. power input shaft; 303. second straight gear; 4. plate heat exchanger; 40 1. First gas inlet; 402. Second gas inlet; 403. First gas outlet; 404. Second gas outlet; 5. Drive box; 501. Rotating motor; 502. Motor reducer; 503. First bevel gear; 6. Blocking plate; 601. Conical raised slope; 602. Blanking port; 603. First inclined guide plate; 6031. Vertical guide part; 6032. Second inclined guide plate; 7. Inlet pipe; 701. Gas distribution ring pipe; 702. Gas nozzle. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Example 1 Reference Figure 1-12A drying system for processing instant vermicelli, comprising a lifting conveyor belt 1, a drying tower 2, a transfer conveyor belt 3 and a plate heat exchanger 4, one end of the lifting conveyor belt 1 extends to the top of the drying tower 2 and is aligned with a feed port 201 at the top of the drying tower 2, a discharge port 202 is arranged at the bottom of the drying tower 2, and the discharge port 202 is directly opposite to the transfer conveyor belt 3, a plurality of barrier plates 6 are arranged inside the drying tower 2, the barrier plates 6 divide the drying tower 2 into a plurality of drying chambers, and an air inlet pipe 7 and an air outlet pipe 204 are installed at a height corresponding to each drying chamber on the drying tower 2; The blocking disc 6 is provided with a material drop opening 602, and a rotating push plate 2033 is provided on the blocking disc 6. The plurality of rotating push plates 2033 rotate synchronously, and the positions of the material drop openings 602 on the upper and lower adjacent blocking discs 6 are staggered at equal angles from top to bottom. The compressed and dehydrated vermicelli cake is placed on the lifting conveyor belt 1, and is transported to the top of the drying tower 2 through the lifting conveyor belt 1, so that the feeding port 201 at the top of the drying tower 2 is put into the drying tower 2, and the vermicelli cake will first fall into the topmost barrier plate 6, and due to the rotation and pushing of the rotating push plate 2033, it will be gradually pushed to the position of the drop port 602, and then fall into the next layer of barrier plate 6. Such slow and intermittent falling can greatly prolong the time that the vermicelli cake stays in the drying tower 2, thereby improving the drying effect; Since the position of the drop port 602 is staggered at equal angles from top to bottom, the vermicelli cake ball falling from above will not fall directly into the drop port 602 of the current barrier plate 6, but will fall into the drop port 602 of the current barrier plate 6 on the side of the rotation direction of the rotating push plate 2033. As the rotating push plate 2033 rotates, the vermicelli cake ball will rotate and move along the inside of the barrier plate 6. It will reach the position of the drop port 602 after moving one circle and fall to the next layer, which can ensure that the vermicelli cake ball stays in the current barrier plate 6 for a sufficient time.

[0025] The drying chambers are respectively a high-temperature quick-drying chamber and a low-temperature drying chamber, and the high-temperature quick-drying chamber is close to the feed port 201, and the low-temperature drying chamber is close to the discharge port 202; In the early stage of drying vermicelli cakes, the moisture content is high, and hot air with a higher temperature is needed to quickly evaporate a large amount of moisture to improve drying efficiency. If a lower temperature is used for drying at the beginning, the moisture evaporates slowly, which will consume more time and energy. As the moisture content of the vermicelli cakes gradually decreases, if high temperature drying is still used, the surface of the vermicelli cakes may be over-dried or even burnt, while the internal moisture has not been fully discharged. At this time, the use of lower temperature hot air can make the moisture migrate and evaporate more evenly from the inside of the vermicelli cake to the surface, while ensuring the drying quality and avoiding energy waste. Therefore, the combination of high-temperature quick-drying chamber and low-temperature drying chamber can take into account both drying efficiency and energy saving, and the number of high-temperature quick-drying chambers is less than the number of low-temperature drying chambers. The drying effect can be adjusted by adjusting the number of the two to achieve the optimal energy utilization.

[0026] Example 2 Reference Figure 1-12 The difference between this embodiment and embodiment 1 is that the plate heat exchanger 4 is used to recover the hot air discharged from the high-temperature quick-drying chamber for preheating and to assist in heating the air intake of the low-temperature drying chamber. The plate heat exchanger 4 includes a first gas inlet 401, a second gas inlet 402, a first gas outlet 403 and a second gas outlet 404. The first gas inlet 401 is connected to the outlet pipe 204 corresponding to the high-temperature quick-drying chamber through a pipeline, the second gas inlet 402 is connected to the hot air blower that generates low-temperature hot air, and the second gas outlet 404 is connected to the air intake pipe 7 corresponding to the low-temperature drying chamber through a pipeline. The hot air flowing out of the outlet pipe 204 of the high-temperature quick-drying chamber still has a high temperature. In order to utilize it for preheating, it is introduced into the plate heat exchanger 4. The low-temperature hot air generated by the hot air blower is also introduced into the plate heat exchanger 4. The two perform heat exchange, thereby utilizing the waste heat of the gas inside the high-temperature quick-drying chamber to assist in heating the gas introduced into the low-temperature drying chamber, further improving the utilization rate of heat and being more energy-saving and environmentally friendly.

[0027] Example 3 Reference Figure 1-12 The difference between this embodiment and embodiment 1 is that a laser switch device is provided at one end of the lifting conveyor belt 1 near the feeding port 201 at the top of the drying tower 2. The laser switch device includes a laser generating module 101 and a laser receiving module 102. When the vermicelli cake ball near one end of the lifting conveyor belt 1 near the laser switching device falls, it will pass between the laser generating module 101 and the laser receiving module 102, thereby blocking the light path. After the controller of the lifting conveyor belt 1 accepts this model, the lifting conveyor belt 1 will be suspended, thereby ensuring that only one vermicelli cake ball is put in each time, and preventing multiple vermicelli cake balls from accumulating in the blocking plate 6 after being put in at one time, thereby causing congestion and blocking the feeding port 602, making the system run more stable.

[0028] Among them, a vertical rotating shaft 203 is rotatably installed in the drying tower 2, and the vertical rotating shaft 203 movably passes through multiple blocking plates 6, and multiple rotating push plates 2033 are fixed on the outside of the vertical rotating shaft 203. A driving box 5 is fixed on the top of the drying tower 2, and a rotating motor 501 and a motor reducer 502 are installed in the driving box 5. The output end of the motor reducer 502 is fixed with a first bevel gear 503, and the top of the vertical rotating shaft 203 extends to the outside of the drying tower 2 and is fixed with a second bevel gear 2031, and the first bevel gear 503 is meshed with the second bevel gear 2031; The rotating motor 501 is turned on to decelerate through the motor reducer 502, thereby driving the first bevel gear 503 to rotate slowly, and then the first bevel gear 503 is engaged with the second bevel gear 2031 to drive the vertical shaft 203 to rotate slowly, and then the rotating push plate 2033 can be driven to move to push the material.

[0029] Example 4 Reference Figure 1-12 The difference between this embodiment and the embodiment 3 is that the bottom end of the vertical rotating shaft 203 extends to the outside of the drying tower 2 and is fixed with a first spur gear 2032, the first spur gear 2032 is an incomplete gear, and a power input shaft 302 is provided on the power box 301 of the transfer conveyor belt 3, and a second spur gear 303 is fixed on the top of the power input shaft 302, the diameter of the second spur gear 303 is smaller than the diameter of the first spur gear 2032, and the two are meshed; Every time the vertical rotating shaft 203 rotates one circle, a vermicelli cake ball will be pushed to the position of the drop port 602 by rotating the push plate 2033, and fall from the discharge port 202 to the top of the transfer conveyor belt 3. Every time the power input shaft 302 rotates one circle, it will drive the first spur gear 2032 to rotate one circle, and drive the second spur gear 303 to rotate multiple circles through meshing. Since the first spur gear 2032 is an incomplete gear, the second spur gear 303 will rotate intermittently. Since the second spur gear 303 is connected to the power input shaft 302, it can drive the transfer conveyor belt 3 to operate intermittently, and the transportation distance each time is the same, and this transportation frequency matches the rotation speed of the power input shaft 302. No matter how the power input shaft 302 is adjusted, the transfer conveyor belt 3 will reach a transportation speed that matches it, which can prevent the vermicelli cake balls from piling up on the top of the transfer conveyor belt 3 due to the transfer of the transfer conveyor belt 3 being too slow, and can facilitate the subsequent processing and packaging of the vermicelli cake balls.

[0030] Example 5 Reference Figure 1-12 The difference between this embodiment and the embodiment 1 is that a flip feeder is fixed at the bottom end of the blocking plate 6 and the position corresponding to the material drop opening 602, the flip feeder is provided with a first inclined guide plate 603 near the top end, and a second inclined guide plate 6032 is provided near the bottom end of the flip feeder, a vertical guide portion 6031 is provided between the first inclined guide plate 603 and the second inclined guide plate 6032, and the first inclined guide plate 603 and the second inclined guide plate 6032 are symmetrically arranged up and down; When the vermicelli cake moves to the drop port 602, it will slide down along the first inclined guide plate 603 of the flip feeder, and be converted to a vertical state through the vertical guide part 6031, and then move to the second inclined guide plate 6032. Since the first inclined guide plate 603 and the second inclined guide plate 6032 are symmetrically arranged up and down, after moving to the second inclined guide plate 6032, it will flip one hundred and eighty degrees and turn the other side up. Each time the vermicelli cake passes through the flip feeder, it will turn the other side up, so that the vermicelli cake is heated more evenly and the drying effect is better.

[0031] The top of the blocking disc 6 is provided with a conical convex inclined surface 601, and the end of the rotating push plate 2033 located directly above the conical convex inclined surface 601 is provided with an arc-shaped bent portion 2034, and the side of the arc-shaped bent portion 2034 facing the rotation direction of the rotating push plate 2033 is a convex surface; Due to the existence of the conical raised slope 601, when the vermicelli cake ball falls near the center position, it will fall to the top of the conical raised slope 601 and slide toward the edge of the blocking plate 6, and due to the existence of the arc-shaped bent portion 2034, when the rotating push plate 2033 rotates, the thrust generated by the raised portion of the arc-shaped bent portion 2034 on the vermicelli cake ball will have a component force that pushes the vermicelli cake ball to move toward the edge position of the blocking plate 6, ensuring that the vermicelli cake ball will eventually move to the edge position of the blocking plate 6 and ensure that the vermicelli cake ball will slide into the blanking port 602.

[0032] Among them, one end of the air inlet pipe 7 extends to the inside of the drying chamber and is connected to the gas distribution ring pipe 701, and a plurality of gas nozzles 702 are installed on the gas distribution ring pipe 701. The gas nozzles 702 are evenly distributed in a ring shape on the gas distribution ring pipe 701, and the gas nozzles 702 are bent downward, facing the inside of the barrier plate 6 near the edge. Since the vermicelli cake ball is pushed along the edge of the barrier plate 6 by the rotating push plate 2033, the gas nozzles 702 can blow air directly at the vermicelli cake ball, thereby improving the drying efficiency.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0036] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A drying system for processing instant vermicelli, comprising a lifting conveyor belt (1), a drying tower (2), a transfer conveyor belt (3) and a plate heat exchanger (4), characterized in that: One end of the lifting conveyor belt (1) extends to the top of the drying tower (2) and is aligned with the feed port (201) at the top of the drying tower (2); a discharge port (202) is provided at the bottom of the drying tower (2), and the discharge port (202) faces the transfer conveyor belt (3); a plurality of barrier disks (6) are provided inside the drying tower (2), and the barrier disks (6) divide the drying tower (2) into a plurality of drying chambers; and an air inlet pipe (7) and an air outlet pipe (204) are installed at a height corresponding to each drying chamber on the drying tower (2); A material drop opening (602) is provided on the barrier disk (6), and a rotating push plate (2033) is provided on the barrier disk (6); a plurality of rotating push plates (2033) rotate synchronously, and the positions of the material drop openings (602) on the upper and lower adjacent barrier disks (6) are staggered at equal angles from top to bottom; The drying chambers are respectively a high-temperature quick-drying chamber and a low-temperature drying chamber, wherein the high-temperature quick-drying chamber is close to the feed inlet (201) and the low-temperature drying chamber is close to the discharge outlet (202); The plate heat exchanger (4) is used to recover the hot air discharged from the high-temperature quick-drying chamber for preheating, and to perform auxiliary heating on the intake air of the low-temperature drying chamber.

2. The drying system for processing instant vermicelli according to claim 1, characterized in that: The plate heat exchanger (4) comprises a first gas inlet (401), a second gas inlet (402), a first gas outlet (403) and a second gas outlet (404); the first gas inlet (401) is connected to an outlet pipe (204) corresponding to the high-temperature quick-drying chamber via a pipeline; the second gas inlet (402) is connected to a hot air blower that generates low-temperature hot air; and the second gas outlet (404) is connected to an inlet pipe (7) corresponding to the low-temperature drying chamber via a pipeline.

3. The drying system for processing instant vermicelli according to claim 1, characterized in that: A laser switch device is provided at one end of the lifting conveyor belt (1) close to the top feed port (201) of the drying tower (2), and the laser switch device comprises a laser generating module (101) and a laser receiving module (102).

4. The drying system for processing instant vermicelli according to claim 1, characterized in that: A vertical rotating shaft (203) is rotatably installed in the drying tower (2), the vertical rotating shaft (203) movably passes through a plurality of blocking plates (6), and a plurality of rotating push plates (2033) are all fixed on the outside of the vertical rotating shaft (203).

5. The drying system for processing instant vermicelli according to claim 4, characterized in that: A driving box (5) is fixed at the top of the drying tower (2), a rotating motor (501) and a motor reducer (502) are installed in the driving box (5), a first bevel gear (503) is fixed at the output end of the motor reducer (502), a top end of the vertical rotating shaft (203) extends to the outside of the drying tower (2) and is fixed with a second bevel gear (2031), and the first bevel gear (503) is meshed with the second bevel gear (2031).

6. The drying system for processing instant vermicelli according to claim 4, characterized in that: The bottom end of the vertical rotating shaft (203) extends to the outside of the drying tower (2) and is fixed with a first spur gear (2032), the first spur gear (2032) being an incomplete gear. A power input shaft (302) is provided on the power box (301) of the transfer conveyor belt (3), a second spur gear (303) is fixed to the top end of the power input shaft (302), the diameter of the second spur gear (303) is smaller than the diameter of the first spur gear (2032), and the two are meshed.

7. The drying system for processing instant vermicelli according to claim 1, characterized in that: A flip feeder is fixed at a position corresponding to the bottom end of the blocking plate (6) and the material drop opening (602); a first inclined guide plate (603) is provided near the top end of the flip feeder; a second inclined guide plate (6032) is provided near the bottom end of the flip feeder; a vertical guide portion (6031) is provided between the first inclined guide plate (603) and the second inclined guide plate (6032); the first inclined guide plate (603) and the second inclined guide plate (6032) are symmetrically arranged up and down.

8. The drying system for processing instant vermicelli according to claim 1, characterized in that: The top of the blocking disc (6) is provided with a conical raised inclined surface (601), and the end of the rotating push plate (2033) located directly above the conical raised inclined surface (601) is provided with an arc-shaped bent portion (2034), and the side of the arc-shaped bent portion (2034) facing the rotation direction of the rotating push plate (2033) is a convex surface.

9. The drying system for processing instant vermicelli according to claim 8, characterized in that: One end of the air inlet pipe (7) extending into the drying chamber is in communication with a gas distribution ring pipe (701), and a plurality of gas nozzles (702) are installed on the gas distribution ring pipe (701).

10. The drying system for processing instant vermicelli according to claim 9, characterized in that: The gas nozzles (702) are evenly distributed in a circular shape on the gas distribution ring tube (701), and the gas nozzles (702) are bent downward and face the inside of the barrier disk (6) close to the edge.

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