A kind of ultrasonic high frequency vibration based washing machine

Abstract

The application provides a tobacco stem washing machine based on ultrasonic high-frequency vibration, which comprises a screen conveying mechanism, an ultrasonic vibration cleaning mechanism, a screen lifting mechanism and a plurality of cleaning screens for containing tobacco stems; the screen conveying mechanism is used to drive each cleaning screen to rotate and translate on the same horizontal plane; the ultrasonic vibration cleaning mechanism contains cleaning liquid and is provided with an ultrasonic generator, which is used to clean the tobacco stems in the cleaning screen immersed in the cleaning liquid; the screen lifting mechanism is used to lower the cleaning screen into the cleaning liquid of the ultrasonic vibration cleaning mechanism when the screen conveying mechanism rotates and translates the cleaning screen to the upper side of the ultrasonic vibration cleaning mechanism, and the cleaning screen is returned to the upper side of the ultrasonic vibration cleaning mechanism after the tobacco stems are cleaned. The application can effectively reduce the labor intensity of workers.

Description

Technical Field

[0001] This invention belongs to the field of tobacco equipment technology, specifically relating to a tobacco stem washing machine based on ultrasonic high-frequency vibration. Background Technology

[0002] Before processing, tobacco stems need to be cleaned and sterilized. Currently, tobacco stem washing machines are generally divided into two types according to their structure: one is the rotary drum type and the other is the vibrating screen type. Both types of tobacco stem washing machines cause the tobacco stems to turn and move during the cleaning process, which makes it easy for the tobacco stems to get stuck in the holes and gaps of the rotary drum and the vibrating screen. They need to be cleaned regularly, otherwise their utilization efficiency will be reduced.

[0003] Chinese patent application CN102524937B discloses a stem washing machine, including a lower re-dampening box. The lower re-dampening box comprises a lower body, an overflow tank, a water trough, and a discharge mesh bag. The overflow tank has a water inlet, the bottom of the lower body has a drain outlet, and the bottom of the water trough has a corrugated plate. Above the lower re-dampening box is an upper re-dampening box, which includes an upper body, a water storage tank, a first stem washing plate, and a second stem washing plate. The water storage tank has a water inlet, which is connected to a circulating pump... The drain outlet of the lower damping box is connected; a material discharge port is provided at the bottom of the upper box, which is located directly above the water tank of the lower damping box; the front end of the first washing stem plate is connected to the upper edge of the water storage tank, and the rear end of the first washing stem plate is inclined downward; the front end of the second washing stem plate is located directly below the rear end of the first washing stem plate, and the rear end of the second washing stem plate is inclined downward and extends to the material discharge port; this can increase the soaking time of the stems, facilitate the uniform penetration of liquid and water, improve the processing resistance of the tobacco stems, and reduce material consumption.

[0004] However, the aforementioned tobacco stem washing machine has the following shortcomings: Although it conveys and washes tobacco stems through a first and second washing plate, and both the rear ends of the first and second washing plates are inclined downwards, it does not take into account the irregular shape of the tobacco stems. During the conveying process, the tobacco stems often become entangled and stagnate on the first and second washing plates, requiring manual periodic clearing of the stems on these plates, thus increasing the labor intensity for workers. Therefore, how to reduce the labor intensity of workers during tobacco stem washing has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide a stem washing machine based on ultrasonic high-frequency vibration to solve the above-mentioned technical problems in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A tobacco stem washing machine based on ultrasonic high-frequency vibration includes a screen conveying mechanism, an ultrasonic vibration cleaning mechanism, a screen lifting mechanism, and multiple cleaning screens. The cleaning screens are used to hold tobacco stems. The screen conveying mechanism drives each cleaning screen to rotate and translate on the same horizontal plane. The ultrasonic vibration cleaning mechanism contains cleaning fluid and is equipped with an ultrasonic generator for ultrasonically cleaning the tobacco stems immersed in the cleaning fluid. The screen lifting mechanism lowers the cleaning screens into the cleaning fluid when the screen conveying mechanism rotates and translates the screens to a position directly above the ultrasonic vibration cleaning mechanism. After the tobacco stems are cleaned, the cleaning screens return to their original position directly above the ultrasonic vibration cleaning mechanism.

[0008] Preferably, the screen conveying mechanism includes a gantry frame, a driving wheel, and a driven wheel. The driving wheel and the driven wheel are rotatably disposed at the left and right ends of the gantry frame, respectively, and are connected by a transmission chain. A drive motor is also disposed at the left end of the gantry frame, and the output shaft of the drive motor is coaxially connected to the driving wheel. A plurality of cleaning screens are disposed on the outer wall surface of the transmission chain. The ultrasonic vibration cleaning mechanism is disposed at the lower front side of the gantry frame. The screen lifting mechanism is disposed on the top plate of the gantry frame.

[0009] Preferably, the washing screen is connected to the transmission chain via a mounting frame. The mounting frame includes an inverted L-shaped plate, two first connecting plates, and two second connecting plates. A first rotating shaft parallel to the gantry frame is located at the end of the horizontal plate of the inverted L-shaped plate away from its vertical plate. The left and right ends of the first rotating shaft are rotatably connected to the middle positions of the left and right sides of the washing screen via the first connecting plates. A second rotating shaft parallel to the first rotating shaft is located at the end of the horizontal plate of the inverted L-shaped plate near the vertical plate. The left and right ends of the second rotating shaft are rotatably connected to the left and right sides of the rear end of the washing screen via the second connecting plates. The screen lifting mechanism includes an elastic reset component and a flat pushing mechanism. The middle positions of the two second connecting plates are connected by a connecting rod. The rod is parallel to the first rotating shaft. One end of the elastic reset member is rotatably connected to the connecting rod, and the other end of the elastic reset member is rotatably connected to the lower part of the vertical plate. The first connecting plate is parallel to the second connecting plate. The rear ends of the two second connecting plates are connected by a U-shaped frame. The U-shaped frame includes two support plates and a connecting shaft. The front ends of the two support plates are respectively connected to the rear ends of the two second connecting plates to form a V-shaped structure. The included angle between the support plates and the second connecting plates is an obtuse angle. The rear ends of the two support plates are connected by the connecting shaft. The connecting shaft is parallel to the first rotating shaft and located directly above the horizontal plate. The flat pushing mechanism is set on the top plate of the gantry frame. The flat pushing mechanism is used to push the connecting shaft to rotate around the second rotating shaft.

[0010] Preferably, the pushing mechanism includes a pushing cylinder and a pushing plate for contacting the connecting shaft. The pushing cylinder extends in the front-rear direction, and the pushing plate is perpendicularly connected to the front end of the piston rod of the pushing cylinder.

[0011] Preferably, the ultrasonic vibration cleaning mechanism includes a cleaning tank and four partitions. The four partitions evenly divide the inner cavity of the cleaning tank into five cleaning chambers for accommodating the cleaning screen. Each cleaning chamber is provided with the cleaning liquid and the ultrasonic generator. There are five screen lifting mechanisms, and each screen lifting mechanism corresponds to one of the cleaning chambers.

[0012] Preferably, the cleaning screen includes a rectangular outer frame and a screen body, the screen body being movably fitted inside the rectangular outer frame, and the upper front end of the screen body being rotatably connected to the rectangular outer frame.

[0013] Preferably, it further includes a dehydration and sterilization mechanism for dehydrating and sterilizing the cleaned tobacco stems.

[0014] Preferably, the dehydration and sterilization mechanism includes a first bent pipe, a second bent pipe, a high-pressure air nozzle, and a hot air nozzle. One end of the first bent pipe is fixed to the top plate of the gantry frame and connected to a high-pressure air source, and the other end of the first bent pipe is connected to the high-pressure air nozzle. One end of the second bent pipe is fixed to the top plate of the gantry frame and connected to a high-temperature air source, and the other end of the second bent pipe is connected to the hot air nozzle. The distance between the high-pressure air nozzle and the hot air nozzle is equal to the distance between two adjacent cleaning screens.

[0015] Preferably, it further includes a feeding mechanism for separating the dehydrated and sterilized tobacco stems from the cleaning screen.

[0016] Preferably, the feeding mechanism includes a lifting cylinder and a feeding push rod. The lifting cylinder is vertically arranged, and the feeding push rod is vertically connected to the upper end of the piston rod of the lifting cylinder.

[0017] The beneficial effects of this invention are as follows:

[0018] The tobacco stem washing machine of the present invention utilizes a screen conveying mechanism to rotate and translate each washing screen containing tobacco stems on the same horizontal plane. When the washing screen is directly above the ultrasonic vibration cleaning mechanism, a screen lifting mechanism lowers the washing screen into the cleaning liquid immersed in the ultrasonic vibration cleaning mechanism. Then, an ultrasonic generator is activated to cause the cleaning liquid to vibrate at high frequency, ultrasonically cleaning the tobacco stems in the immersed washing screen. After the tobacco stems are cleaned, the screen lifting mechanism returns the washing screen to its original position directly above the ultrasonic vibration cleaning mechanism. Therefore, the present invention can effectively clean tobacco stems without the need for manual periodic sifting as in existing technologies, thus effectively reducing the labor intensity of workers. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly described below, and the specific embodiments of the present invention will be further described in detail with reference to the drawings, wherein...

[0020] Figure 1 A schematic diagram of the right front side of a stalk washing machine based on ultrasonic high-frequency vibration provided in an embodiment of the present invention;

[0021] Figure 2 A schematic diagram of the left rear side of a stalk washing machine based on ultrasonic high-frequency vibration provided in an embodiment of the present invention;

[0022] Figure 3 The left view of the stem washing machine based on ultrasonic high-frequency vibration provided in an embodiment of the present invention;

[0023] Figure 4 A partial cross-sectional view of the screen conveying mechanism provided in an embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the screen lifting mechanism and the feeding mechanism provided in an embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram showing the cleaning screen descending into the cleaning tank according to an embodiment of the present invention.

[0026] Figure 7 This is a schematic diagram of the cleaning screen provided in an embodiment of the present invention after it returns to its original position under the action of the elastic reset member;

[0027] Figure 8 This is a schematic diagram of an ultrasonic vibration cleaning mechanism provided in an embodiment of the present invention.

[0028] Marked in the attached diagram:

[0029] 1. Screen conveying mechanism; 11. Gantry frame; 12. Driving wheel; 13. Driven wheel.

[0030] 14. Drive chain belt; 15. Cross plate; 16. Second connecting plate; 17. Support wheel.

[0031] 18. Drive motor; 19. Annular groove; 111. Strip groove; 141. Guide block; 151. Vertical plate.

[0032] 161. First connecting plate; 162. First rotating shaft; 163. Second rotating shaft.

[0033] 171. Support plate; 172. Connecting shaft;

[0034] 2. Ultrasonic vibration cleaning mechanism; 21. Cleaning tank; 22. Ultrasonic generator; 23. Baffle; 24. First cleaning chamber; 25. Second cleaning chamber; 26. Third cleaning chamber.

[0035] 27. Fourth cleaning chamber; 28. Fifth cleaning chamber;

[0036] 3. Screen lifting mechanism; 31. Horizontal push cylinder; 32. Elastic reset component; 33. Horizontal push plate;

[0037] 4. Dehydration and sterilization mechanism; 41. First bend pipe; 42. Second bend pipe.

[0038] 43. High-pressure air nozzle; 44. Hot air nozzle;

[0039] 5. Unloading mechanism, 51. Lifting cylinder, 52. Unloading push rod;

[0040] 6. Cleaning the screen; 61. Rectangular outer frame; 62. Screen body; 63. Rotating shaft. Detailed Implementation

[0041] To enable those skilled in the art to better understand the technical solution of the present invention, the present solution will be further described in detail below with reference to specific embodiments.

[0042] like Figures 1 to 8 As shown, this embodiment of the invention provides a tobacco stem washing machine based on ultrasonic high-frequency vibration, which includes a screen conveying mechanism 1, an ultrasonic vibration cleaning mechanism 2, a screen lifting mechanism 3, and multiple cleaning screens 6. The cleaning screens 6 are used to hold tobacco stems. The screen conveying mechanism 1 is used to drive each of the cleaning screens to rotate and translate on the same horizontal plane. The ultrasonic vibration cleaning mechanism is filled with cleaning liquid and equipped with an ultrasonic generator 22 for ultrasonically cleaning the tobacco stems immersed in the cleaning liquid. The screen lifting mechanism 3 is used to lower the cleaning screens 6 into the cleaning liquid of the ultrasonic vibration cleaning mechanism when the screen conveying mechanism rotates and translates the cleaning screens 6 to directly above the ultrasonic vibration cleaning mechanism 2, and after the tobacco stems are cleaned, the cleaning screens 6 are returned to directly above the ultrasonic vibration cleaning mechanism.

[0043] The tobacco stem washing machine based on ultrasonic high-frequency vibration provided in this invention operates by using a screen conveying mechanism 1 to rotate and translate each washing screen 6 containing tobacco stems on the same horizontal plane. When the washing screen 6 rotates and translates to be directly above the ultrasonic vibration cleaning mechanism 2, a screen lifting mechanism lowers the washing screen to be immersed in the cleaning liquid of the ultrasonic vibration cleaning mechanism. Then, an ultrasonic generator is activated to cause the cleaning liquid to vibrate at high frequency, ultrasonically cleaning the tobacco stems in the washing screen. After the tobacco stems are cleaned, the screen lifting mechanism returns the washing screen to its original position directly above the ultrasonic vibration cleaning mechanism. Therefore, this invention can effectively clean tobacco stems without the need for manual periodic sifting of tobacco stems as in existing technologies, thus effectively reducing the labor intensity of workers.

[0044] Furthermore, the screen conveying mechanism 1 includes a gantry frame 11, a drive wheel 12, and a driven wheel 13. The drive wheel and the driven wheel are rotatably mounted at the left and right ends of the gantry frame, respectively, and are connected by a transmission chain 14. A drive motor 18 is also provided at the left end of the gantry frame, and the output shaft of the drive motor 18 is coaxially connected to the drive wheel. Multiple cleaning screens are respectively mounted on the outer wall of the transmission chain. The ultrasonic vibration cleaning mechanism is located at the lower front side of the gantry frame. The screen lifting mechanism is located on the top plate of the gantry frame. Using this design, the drive motor drives the drive wheel 12 to rotate, which in turn drives the driven wheel 13 to rotate via the transmission chain, causing the transmission chain 14 to operate and thus rotating and translating the cleaning screens fixed on it.

[0045] Specifically, the cleaning screen 6 is connected to the transmission chain via a mounting frame. The mounting frame includes an inverted L-shaped plate, two first connecting plates 161, and two second connecting plates 16. A first rotating shaft 162, parallel to the gantry frame, is provided at one end of the horizontal plate 15 of the inverted L-shaped plate away from its vertical plate 151. The left and right ends of the first rotating shaft 162 are rotatably connected to the middle positions of the left and right sides of the cleaning screen 6 via the first connecting plates. A second rotating shaft 163, parallel to the first rotating shaft, is provided at one end of the horizontal plate of the inverted L-shaped plate near the vertical plate. The left and right ends of the second rotating shaft 163 are rotatably connected to the left and right sides of the rear end of the cleaning screen 6 via the second connecting plates 16. The screen lifting mechanism 3 includes an elastic reset member 32 and a flat pushing mechanism. The middle positions of the two second connecting plates are connected by a connecting rod. The connecting rod is parallel to the first rotating shaft. One end of the elastic reset member 32 is rotatably connected to the connecting rod, and the other end of the elastic reset member 32 is rotatably connected to the lower part of the vertical plate 151. The first connecting plate and the second connecting plate are parallel, and the rear ends of the two second connecting plates are connected by a U-shaped frame. The U-shaped frame includes two support plates 171 and a connecting shaft 172. The front ends of the two support plates are respectively connected to the rear ends of the two second connecting plates to form a V-shaped structure. The included angle between the support plates and the second connecting plates is an obtuse angle. The rear ends of the two support plates are connected by the connecting shaft 172. The connecting shaft is parallel to the first rotating shaft and located directly above the horizontal plate. The flat pushing mechanism is set on the top plate of the gantry frame 11. The flat pushing mechanism is used to push the connecting shaft to rotate around the second rotating shaft. Using this scheme, when the cleaning screen 6 moves directly above the ultrasonic vibration cleaning mechanism, the pushing mechanism activates, pushing the connecting shaft to rotate counterclockwise around the second rotating shaft. This causes the second connecting plate to overcome the restoring force of the elastic reset member and rotate counterclockwise around the second rotating shaft. At this time, the first connecting plate will also rotate counterclockwise around the first rotating shaft, causing the cleaning screen to move downwards until it is placed in the cleaning liquid. After the tobacco stems are cleaned, the pushing mechanism stops and returns to its original position, disengaging from the connecting shaft. At this time, under the restoring force of the elastic reset member, the first connecting plate rotates clockwise around the first rotating shaft, and both the second connecting plate and the connecting shaft rotate clockwise around the second rotating shaft, causing the cleaning screen to return to its original position directly above the ultrasonic vibration cleaning mechanism, i.e., back to the horizontal plane where the cleaning screen was during its rotation and translation, without interfering with or colliding with the top of the ultrasonic vibration cleaning mechanism. The first connecting plate, the second connecting plate, the inverted L-shaped plate, and the elastic reset member ensure that the cleaning screen remains horizontal during its up-and-down movement and rotation and translation, preventing it from tipping over.

[0046] Preferably, the pushing mechanism includes a pushing cylinder 31 and a pushing plate 33 for contacting the connecting shaft. The pushing cylinder extends in the front-rear direction, and the pushing plate is perpendicularly connected to the front end of the piston rod of the pushing cylinder. With this design, when the tobacco stems need cleaning, the pushing cylinder is activated, and its piston rod extends, allowing the pushing plate to push the connecting shaft to rotate around the second rotating shaft, thus placing the cleaning screen in the cleaning liquid. After the tobacco stems are cleaned, the pushing cylinder stops working, and its piston rod retracts, at which point the pushing plate disengages from the connecting shaft.

[0047] Specifically, the horizontal thrust cylinder 31 is a servo electric cylinder or a hydraulic cylinder, which drives the connecting shaft to rotate around the second rotating shaft, thereby moving the cleaning screen downwards via the first and second connecting plates. Simultaneously, the stroke of the piston rod of the servo electric cylinder or hydraulic cylinder is easily controlled, allowing for convenient control of the immersion depth of the cleaning screen in the cleaning liquid. It is understood that the upper end of the cleaning screen is above the surface of the cleaning liquid, meaning the cleaning screen is not completely submerged in the cleaning liquid, to prevent tobacco stems from overflowing into the cleaning liquid.

[0048] Preferably, a support wheel 17 is fitted onto the connecting shaft 172, allowing the support wheel to rotate around the connecting shaft. This enables the pushing mechanism to drive the connecting shaft to rotate around the second rotating shaft via the support wheel 17, facilitating the placement of the cleaning screen in the cleaning solution. It is understood that the duration of each operation of the pushing mechanism can be flexibly set as needed, ensuring the cleaning screen remains continuously in the cleaning solution to guarantee the soaking time and cleaning effect of the tobacco stems. After the set duration is reached, the pushing mechanism removes its thrust on the support wheel 17 and separates from it, returning to its original position.

[0049] Furthermore, the ultrasonic vibration cleaning mechanism includes a cleaning tank 21 and four partitions 23. The four partitions 23 evenly divide the inner cavity of the cleaning tank into five cleaning chambers for accommodating the cleaning screens. Each cleaning chamber contains the cleaning fluid and the ultrasonic generator 22. There are five screen lifting mechanisms, each corresponding to one of the cleaning chambers. This design allows for simultaneous cleaning of tobacco stems within five cleaning screens, effectively improving the cleaning efficiency. Preferably, the cleaning tank is rectangular.

[0050] In one embodiment, the cleaning fluid contained in the five cleaning chambers can be different, such as... Figure 8As shown, specifically: the first cleaning chamber 24 contains a preliminary cleaning solution for removing dust and impurities from the surface of the tobacco stems; the second cleaning chamber 25 contains a detergent solution for deep cleaning of the tobacco stems; the third cleaning chamber 26 contains hot water for high-temperature disinfection of the tobacco stems and improvement of their processing quality; the fourth cleaning chamber 27 contains clean water for preliminary rinsing of the tobacco stems; and the fifth cleaning chamber 28 contains deionized water for thorough rinsing of the tobacco stems. It can be understood that the first, second, third, fourth, and fifth cleaning chambers are arranged sequentially in the clockwise direction of the drive belt.

[0051] In this scheme, when a cleaning screen rotates and moves to directly above the first cleaning chamber 24, the pushing mechanism of the screen lifting mechanism 3 corresponding to that cleaning chamber is activated, causing the cleaning screen to descend into the first cleaning chamber 24. This allows the tobacco stems inside the cleaning screen 6 to be soaked in the preliminary cleaning liquid in the first cleaning chamber. At this time, the ultrasonic generator 22 in the first cleaning chamber 24 is activated, causing the preliminary cleaning liquid to vibrate at high frequency, thus performing preliminary cleaning of the dust and impurities on the surface of the tobacco stems. After cleaning, under the restoring force of the elastic reset member, the cleaning screen 6 returns to its original position. Directly above the cleaning chamber 24; similarly, the second cleaning chamber 25 can perform deep cleaning of the tobacco stems in the cleaning screen 6, the third cleaning chamber 26 can disinfect the tobacco stems in the cleaning screen 6, the fourth cleaning chamber 27 can perform preliminary rinsing of the tobacco stems in the cleaning screen 6, and the fifth cleaning chamber 28 can perform thorough rinsing of the tobacco stems in the cleaning screen 6. This allows the tobacco stems to undergo preliminary cleaning, deep cleaning, disinfection, preliminary rinsing, and thorough rinsing in sequence, thereby achieving a better cleaning effect and ensuring the quality of the tobacco stem cleaning. It can be understood that the five pushing mechanisms operate sequentially at this time.

[0052] The five ultrasonic generators in the five cleaning chambers can be turned on all at once, at intervals, or one by one as needed during tobacco stem cleaning. The power of each of the five ultrasonic generators can be adjusted according to the needs of tobacco stem cleaning to better meet the needs of different stages of tobacco stem cleaning.

[0053] Specifically, the cleaning screen 6 includes a rectangular outer frame 61 and a screen body 62. The screen body is movably fitted inside the rectangular outer frame, and the upper front end of the screen body is rotatably connected to the rectangular outer frame. With this design, during installation, the tobacco stems are placed inside the screen body, and then the screen body is fitted into the rectangular outer frame. After the tobacco stems are cleaned, the rotatable connection between the upper front end of the screen body and the rectangular outer frame allows the screen body to rotate around the rotation axis 63 at the rotatable connection point until the screen body is flipped outside the rectangular outer frame, causing the tobacco stems inside the screen body to pour into the tobacco stem collection container, thus completing the unloading process. It is understood that the rotating shaft is parallel to the first rotating shaft; the screen body is a rectangular box-shaped structure with an open top that is adapted to the rectangular outer frame; screen holes can be evenly distributed on the bottom and each side wall of the screen body; at this time, the two ends of the first connecting plate are rotatably connected to the first rotating shaft and the middle position of the rectangular outer frame respectively, and the two ends of the second connecting plate are rotatably connected to the second rotating shaft and the rear end of the rectangular outer frame respectively.

[0054] Preferably, a mesh fabric with fine openings is laid on the bottom and inner walls of the screen body. This mesh fabric effectively prevents tobacco stems from leaking out or getting stuck in the screen holes, and also ensures that all tobacco stems enter the tobacco stem collection container during feeding. Preferably, the elastic reset element is a reset spring rod.

[0055] Furthermore, the tobacco stem washing machine based on ultrasonic high-frequency vibration also includes a dehydration and sterilization mechanism 4, which is used to dehydrate and sterilize the washed tobacco stems.

[0056] Specifically, the dehydration and sterilization mechanism 4 includes a first bent pipe 41, a second bent pipe 42, a high-pressure air nozzle 43, and a hot air nozzle 44. One end of the first bent pipe is fixed to the top plate of the gantry frame and connected to a high-pressure air source, and the other end of the first bent pipe is connected to the high-pressure air nozzle. One end of the second bent pipe is fixed to the top plate of the gantry frame and connected to a high-temperature air source, and the other end of the second bent pipe is connected to the hot air nozzle. The distance between the high-pressure air nozzle and the hot air nozzle is equal to the distance between two adjacent cleaning screens. Using this method, when the washing screen containing the cleaned tobacco stems is rotated and moved directly below the high-pressure air nozzle, high-pressure gas is supplied to the first bend pipe. The high-pressure gas is then sprayed onto the tobacco stems by the high-pressure air nozzle to dehydrate them. After dehydration is complete, the supply of high-pressure gas to the first bend pipe is stopped. When the washing screen is rotated and moved directly below the hot air nozzle, high-temperature gas is supplied to the second bend pipe. The high-temperature gas is then sprayed onto the tobacco stems by the hot air nozzle to sterilize them. After sterilization is complete, the supply of high-temperature gas to the second bend pipe is stopped, thus effectively achieving the dehydration and sterilization of the cleaned tobacco stems. It is understandable that both the high-pressure air nozzle and the hot air nozzle are located directly above the horizontal plane where the cleaning screen rotates and moves; each high-pressure air nozzle and the hot air nozzle corresponds to one cleaning screen; in the direction of the drive belt's rotation, such as clockwise, the dehydration and sterilization mechanism is located downstream of the ultrasonic vibration cleaning mechanism, wherein the hot air nozzle can be located downstream of the high-pressure air nozzle.

[0057] Furthermore, the tobacco stem washing machine based on ultrasonic high-frequency vibration also includes a feeding mechanism 5, which is used to separate the dehydrated and sterilized tobacco stems from the washing screen. This design utilizes the feeding mechanism to achieve automatic feeding of the tobacco stems, saving manpower and further reducing the labor intensity of workers.

[0058] Specifically, the feeding mechanism 5 includes a lifting cylinder 51 and a feeding push rod 52. The lifting cylinder is vertically arranged, and the feeding push rod is vertically connected to the upper end of the piston rod of the lifting cylinder. With this design, when the cleaning screen rotates and moves to directly above the lifting cylinder, the lifting cylinder actuates, its piston rod extends upward, driving the feeding push rod 52 to push the screen body 62 to flip outside the rectangular outer frame 61, thus emptying the tobacco stems inside the screen body into the tobacco stem collector, completing the automatic feeding. Then, the piston rod of the lifting cylinder retracts, driving the feeding push rod back to directly below the rectangular outer frame. It can be understood that when the feeding push rod moves vertically upward, it can pass through the rectangular outer frame and be positioned directly above it, enabling the flipping of the screen body; when not feeding, the feeding push rod is located directly below the rectangular outer frame; in the direction of the drive belt's rotation (clockwise), the feeding mechanism is located downstream of the dehydration and sterilization mechanism.

[0059] Understandably, after the material is unloaded, the worker can manually flip the screen body into the rectangular frame, embedding it within the frame. Then, a predetermined amount of tobacco stems to be cleaned can be placed into the screen body, spreading them evenly on the bottom. These stems, along with the cleaning screen, are then rotated and moved horizontally by the screen conveyor mechanism. As the screen passes through the ultrasonic vibration cleaning mechanism, the stems undergo ultrasonic cleaning. They are then dehydrated and sterilized in the dehydration and sterilization mechanism. Finally, they are automatically unloaded by the unloading mechanism, and the screen body is then refilled with a fixed amount of tobacco stems. This process achieves quantitative and standardized tobacco stem cleaning, ensuring better cleaning results and realizing lean production in tobacco stem cleaning.

[0060] In the field of ultrasonic vibration, ultrasonic waves at a set frequency can effectively remove dust and debris attached to the surface of an object through high-frequency vibration. Therefore, ultrasonic vibration can be used to clean tobacco stems.

[0061] By controlling the rotation angle of the drive motor, the active wheel can be rotated by a set angle, thereby driving the cleaning screen to move a set distance via the transmission chain 14. This set distance can be an integer multiple of the center distance between two adjacent cleaning screens, and its specific value can be flexibly set as needed. Preferably, this set distance is one time the center distance between two adjacent cleaning screens. Specifically, when the ultrasonic vibration cleaning mechanism has five cleaning chambers and the cleaning liquid in the five cleaning chambers is the same, this set distance can be five times the center distance between two adjacent cleaning screens. In this case, the five pushing mechanisms can operate simultaneously, enabling the cleaning of tobacco stems in the five cleaning screens at once, improving cleaning efficiency. It can be understood that the distance between two adjacent pushing mechanisms is equal to the center distance between two adjacent cleaning screens; the distance between the high-pressure air nozzle and the hot air nozzle is equal to the distance between two adjacent cleaning screens, that is, equal to the center distance between two adjacent cleaning screens.

[0062] Specifically, multiple guide blocks 141 are evenly spaced on the inner wall of the drive chain belt 14. Both the driving wheel 12 and the driven wheel 13 have annular grooves 19 in their circumferential direction. The front and rear side walls of the gantry frame 11 each have a strip-shaped groove 111 extending in the left-right direction, opposite to the annular groove. The guide blocks 141 are embedded in the annular grooves 19 and the strip-shaped grooves 111. Using this design, the guide blocks 141 allow the drive chain belt 14 to rotate while suspended on the driving wheel 12, the driven wheel 13, and the left and right side walls of the gantry frame 11 without detaching.

[0063] Preferably, the guide block 141 has a trapezoidal or triangular structure, wherein the tip of the guide block is located at its inner end, that is, the end of the guide block that is used to contact the bottom of the strip groove or annular groove, so as to better ensure that it will not collide or interfere with each other when it is bent in the annular groove 19, and at the same time reduce friction.

[0064] The ultrasonic vibration cleaning mechanism of the present invention has five cleaning chambers arranged side by side. Each of the five cleaning chambers is equipped with an ultrasonic generator and a cleaning fluid. When the ultrasonic generator is activated, the cleaning fluid vibrates at a high frequency, which cleans the tobacco stems immersed in the cleaning screen at a high frequency, which can significantly improve the cleaning effect. At the same time, the dehydration and sterilization mechanism of the present invention can perform high-pressure dehydration and high-temperature sterilization on the cleaned tobacco stems, so that the moisture content and bacterial content of the tobacco stems can better meet the set processing requirements.

[0065] The above are merely preferred embodiments of the present invention. It should be noted that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. Moreover, after reading the contents of the present invention, those skilled in the art can make various modifications or alterations to the present invention, and these equivalent forms also fall within the scope defined by the appended claims.

Claims

1. A stem washing machine based on ultrasonic high-frequency vibration, characterized in that, It includes a screen conveying mechanism, an ultrasonic vibration cleaning mechanism, a screen lifting mechanism, and multiple cleaning screens. The cleaning screens are used to hold tobacco stems. The screen conveying mechanism is used to drive each of the cleaning screens to rotate and translate on the same horizontal plane. The ultrasonic vibration cleaning mechanism contains cleaning liquid and is equipped with an ultrasonic generator for ultrasonically cleaning the tobacco stems in the cleaning screens immersed in the cleaning liquid. The screen lifting mechanism is used to lower the cleaning screens into the cleaning liquid of the ultrasonic vibration cleaning mechanism when the screen conveying mechanism rotates and translates the cleaning screens to be directly above the ultrasonic vibration cleaning mechanism, and to return the cleaning screens to their original position directly above the ultrasonic vibration cleaning mechanism after the tobacco stems have been cleaned. The screen conveying mechanism includes a gantry frame, a drive wheel, and a driven wheel. The drive wheel and the driven wheel are rotatably mounted at the left and right ends of the gantry frame, respectively, and are connected by a transmission chain. A drive motor is also mounted at the left end of the gantry frame, and the output shaft of the drive motor is coaxially connected to the drive wheel. Multiple cleaning screens are respectively mounted on the outer wall of the transmission chain. The ultrasonic vibration cleaning mechanism is located at the lower front side of the gantry frame. The screen lifting mechanism is located on the top plate of the gantry frame. The cleaning screen is connected to the transmission chain via a mounting frame. The mounting frame includes an inverted L-shaped plate, two first connecting plates, and two second connecting plates. A first rotating shaft parallel to the gantry frame is located at the end of the horizontal plate of the inverted L-shaped plate away from its vertical plate. The left and right ends of the first rotating shaft are rotatably connected to the middle positions of the left and right sides of the cleaning screen via the first connecting plates. A second rotating shaft parallel to the first rotating shaft is located at the end of the horizontal plate of the inverted L-shaped plate near the vertical plate. The left and right ends of the second rotating shaft are rotatably connected to the left and right sides of the rear end of the cleaning screen via the second connecting plates. The screen lifting mechanism includes an elastic reset component and a flat pushing mechanism. The middle positions of the two second connecting plates are connected by a connecting rod. The first rotating shaft is parallel to the second rotating shaft. One end of the elastic reset member is rotatably connected to the connecting rod, and the other end of the elastic reset member is rotatably connected to the lower part of the vertical plate. The first connecting plate and the second connecting plate are parallel to each other. The rear ends of the two second connecting plates are connected by a U-shaped frame. The U-shaped frame includes two support plates and a connecting shaft. The front ends of the two support plates are respectively connected to the rear ends of the two second connecting plates to form a V-shaped structure. The included angle between the support plates and the second connecting plates is an obtuse angle. The rear ends of the two support plates are connected by the connecting shaft. The connecting shaft is parallel to the first rotating shaft and located directly above the horizontal plate. The flat pushing mechanism is set on the top plate of the gantry frame. The flat pushing mechanism is used to push the connecting shaft to rotate around the second rotating shaft. The ultrasonic vibration cleaning mechanism includes a cleaning tank and four partitions. The four partitions evenly divide the inner cavity of the cleaning tank into five cleaning chambers for accommodating the cleaning screen. Each cleaning chamber is equipped with the cleaning liquid and the ultrasonic generator. There are five screen lifting mechanisms, and each screen lifting mechanism corresponds to one of the cleaning chambers. The cleaning screen includes a rectangular outer frame and a screen body. The screen body is movably fitted inside the rectangular outer frame, and the upper front end of the screen body is rotatably connected to the rectangular outer frame.

2. The stalk washing machine based on ultrasonic high-frequency vibration according to claim 1, characterized in that, The pushing mechanism includes a pushing cylinder and a pushing plate for contacting the connecting shaft. The pushing cylinder extends in the front-rear direction, and the pushing plate is perpendicularly connected to the front end of the piston rod of the pushing cylinder.

3. The stalk washing machine based on ultrasonic high-frequency vibration according to claim 1, characterized in that, It also includes a dehydration and sterilization mechanism, which is used to dehydrate and sterilize the cleaned tobacco stems.

4. The stalk washing machine based on ultrasonic high-frequency vibration according to claim 3, characterized in that, The dehydration and sterilization mechanism includes a first bent pipe, a second bent pipe, a high-pressure air nozzle, and a hot air nozzle. One end of the first bent pipe is fixed to the top plate of the gantry frame and connected to a high-pressure air source, while the other end of the first bent pipe is connected to the high-pressure air nozzle. One end of the second bent pipe is fixed to the top plate of the gantry frame and connected to a high-temperature air source, while the other end of the second bent pipe is connected to the hot air nozzle. The distance between the high-pressure air nozzle and the hot air nozzle is equal to the distance between two adjacent cleaning screens.

5. The stalk washing machine based on ultrasonic high-frequency vibration according to claim 3, characterized in that, It also includes a feeding mechanism for separating the dehydrated and sterilized tobacco stems from the cleaning screen.

6. The stalk washing machine based on ultrasonic high-frequency vibration according to claim 5, characterized in that, The unloading mechanism includes a lifting cylinder and an unloading push rod. The lifting cylinder is vertically arranged, and the unloading push rod is vertically connected to the upper end of the piston rod of the lifting cylinder.

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