Warehouse logistics conveying device with sorting structure

Abstract

The invention discloses a warehouse logistics conveying device with a sorting structure, and belongs to the technical field of warehouse logistics conveying devices.The warehouse logistics conveying device comprises a first conveyor and a second conveyor, and a detection module is fixedly installed on the first conveyor; a fixing plate is fixedly mounted on a rack of the first conveyor, an electric telescopic rod is fixedly mounted on the back face of the fixing plate, a guide rail is fixedly mounted at the output end of the electric telescopic rod, an adjusting plate is slidably mounted on the guide rail, and guide plates are symmetrically and fixedly mounted on the outer side of the upper end of the fixing plate. A guide groove is formed in the guide plate in a penetrating mode, the adjusting plate is in sliding connection with the guide groove, and two rotating plates are symmetrically, elastically and rotationally installed on the adjusting plate. According to the warehouse logistics conveying device with the sorting structure, logistics box bodies of different sizes can be stably sorted, and the logistics box bodies can be prevented from greatly abrading the conveying belt body in the sorting process.

Description

Technical Field

[0001] The present invention relates to the technical field of warehousing logistics conveying devices, and in particular to a warehousing logistics conveying device with a sorting structure. Background Art

[0002] In the field of warehousing and logistics, efficient and accurate cargo transportation and sorting are key links to ensure the smooth operation of logistics processes. With the vigorous development of the e-commerce industry and the rapid growth of logistics business volume, the performance requirements for warehousing and logistics equipment are becoming more and more stringent. Traditional warehousing and logistics conveying devices have gradually exposed many drawbacks when facing the transportation of logistics boxes of different sizes, especially in terms of sorting structure, and have become difficult to meet the efficient and intelligent operation needs of modern logistics.

[0003] The prior art (publication number: CN118417191A, Chinese patent publication date: August 2, 2024) discloses a logistics sorting device for logistics, including a conveying mechanism, a guide structure, and a sorting device. The guide structure includes a guide component and a separator component provided on a side panel. The separator component is located at the discharge end of the guide component. The separator component is used to separate logistics items. The sorting device is located at one end of the conveyor belt discharge port. The sorting device includes a multi-group sorting component, which is used to divert logistics items of different qualities. The guide component is used to guide the logistics items on the conveyor belt so that the logistics items pass through two guide plates in sequence. The separator component is used to allow the conveyor belt to transport the logistics items at intervals. The multi-group sorting component is used to perform multi-level sorting according to the weight of the logistics items, so that logistics items of similar weight are transported to the same location. Compared with manual sorting, the sorting efficiency is greatly improved, the express delivery service is more efficient, and it is conducive to improving customers' express delivery needs. Prior art (publication number: CN119793901A, Chinese patent publication date: April 11, 2025) discloses an automatic sorting device for express parcel specifications. To address the problem in prior art where grooves at the joints of the conveyor belts easily cause parcels to become jammed and thin items to be trapped, the following solution is proposed: a conveyor frame neatly arranged on a conveyor line, the conveyor frame comprising two parallel, arched side roller frames, with a common connecting support plate fixed between the tops of the two side roller frames. Parallel conveyor rollers are fixed near the tops of the conveyor frames, with a common conveyor belt wound between the two conveyor rollers. The upper surface of the connecting support plate is lower than the height of the tops of the side roller frames. When conveying thinner parcels, the height of the two anti-twist sliders can be pre-controlled to be lowered, thereby reducing the gap between the top edge of the transition slat and the conveyor belts on both sides. This reduces the chance of parcels falling into the gap between the two conveyor belts, ensuring smooth delivery. When sorting boxes, existing warehouse logistics conveying devices mostly use direct lateral push to change the conveying direction of the logistics boxes, which causes greater friction between the boxes and the conveyor belt when they move, thereby accelerating the wear of the conveyor belt and increasing the probability of conveyor belt deviation, resulting in certain usage defects. Summary of the Invention

[0004] The purpose of the present invention is to provide a conveying device for warehouse logistics with a sorting structure, so as to solve the problem raised in the above background technology that most of the conveying devices for warehouse logistics on the market currently use a direct lateral push method to change the conveying direction of the logistics box when sorting the box body, which causes greater friction between the box body and the conveyor belt when moving, thereby accelerating the wear of the conveyor belt and increasing the probability of conveyor belt deviation.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a conveying device for warehouse logistics with a sorting structure, comprising a first conveyor and a second conveyor, and a detection module is fixedly installed on the first conveyor; a fixed plate is fixedly installed on the frame of the first conveyor, and an electric telescopic rod is fixedly installed on the back of the fixed plate, and a guide rail is fixedly installed on the output end of the electric telescopic rod, and an adjustment plate is slidably installed on the guide rail, and a guide plate is symmetrically fixedly installed on the outer side of the upper end of the fixed plate, and a guide groove is opened through the guide plate, and the adjustment plate and the guide groove are slidably connected, two rotating plates are symmetrically and elastically installed on the adjusting plate, and the rotating plate is connected to a support plate through an adjusting component, and a splint is elastically connected to the outer side of the support plate, and an adsorption component for adsorbing the logistics box is installed on the splint.

[0006] Preferably, a slider is slidably provided on the inner side of the guide rail, and the slider is arranged in a T-shaped structure, and the slider is fixedly installed on the back side of the adjustment plate, and the adjustment plate and the fixed plate are arranged in parallel.

[0007] Preferably, an axis structure is symmetrically provided on the upper end of the adjustment plate, and the axis on the upper end of the adjustment plate slides along the guide groove. At the same time, the height of the guide groove close to the fixed plate is lower than the other end of the guide groove. When the adjustment plate slides along the guide groove, it drives the slider to slide upward on the inner side of the guide rail.

[0008] Preferably, a guide fixing column is symmetrically fixedly installed on the outer side of the fixing plate, and a sliding sleeve of the guide fixing column is provided with a sliding sleeve, and a first return spring is fixedly connected between the sliding sleeve and the fixing plate.

[0009] Preferably, the shaft of the rotating plate is fixedly mounted with a winding wheel structure, and a first pull rope is wound around the outside of the winding wheel, and the upper end of the first pull rope is fixedly connected to the outside of the sliding sleeve, and the first pull rope pulls the rotating plate to rotate during the movement of the adjustment plate.

[0010] Preferably, the adjustment assembly includes an adjustment screw threadedly connected to the rotating plate, and the adjustment screw is rotatably connected to the support plate, and a first guide rod is symmetrically fixedly installed on the support plate, and the first guide rod is telescopically extended through the rotating plate.

[0011] Preferably, a second guide rod is symmetrically slid through the support plate, and a clamping plate is fixedly connected to the end of the second guide rod away from the rotating plate, and a buffer spring is fixedly connected between the support plate and the clamping plate. At the same time, a rubber pad is provided on the outer side of the clamping plate and fits the outer side of the logistics box.

[0012] Preferably, the adsorption assembly includes a suction cup fixedly mounted on a splint, and the suction cup is telescopically extended through the support plate, and the inner side of the suction cup is slidingly connected with a piston plate, a spring is connected between the suction cup and the piston plate, and a pull rod is fixedly connected to the piston plate, and the pull rod passes through the suction cup, a second pull rope is fixedly connected to the piston plate, and the end of the second pull rope away from the piston plate passes through the suction cup and is fixedly connected to the support plate, and during the elastic sliding process of the splint, the second pull rope pulls the piston plate to slide on the inner side of the suction cup, and the suction cup is adsorbed on the outer side of the logistics box.

[0013] Preferably, an air passage is provided through the piston plate and the pull rod, and the end of the pull rod is elastically connected to a sealing plug through a second return spring, and the sealing plug seals the end of the air passage, and at the same time, a first magnetic block is fixedly installed on the outside of the sealing plug, a fixing frame is fixedly installed on the frame of the second conveyor, and a second magnetic block is fixedly connected to the outside of the upper end of the fixing frame, and the pull rod gradually approaches the fixing frame during the movement and transportation of the splint, and the magnetic poles of the opposite surfaces of the first magnetic block and the second magnetic block are opposite, and the first magnetic block will drive the sealing plug to slide elastically under the action of magnetic force to release the blockage of the air passage.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the warehouse logistics conveying device with a sorting structure can stably sort logistics boxes of different sizes and can prevent the logistics boxes from causing significant wear on the conveyor belt during the sorting process. The specific contents are as follows; 1. An adjustment plate, a rotating plate, a support plate and a clamping plate are provided. As the electric telescopic rod pushes the adjustment plate to move, the rotating plate can rotate synchronously, so that the support plate outside the rotating plate drives the clamping plate to fit and clamp the outside of the logistics box, thereby achieving the clamping and fixing of the logistics box, which is convenient for subsequent movement and sorting.

[0015] Furthermore, an adjusting screw is provided. By rotating the adjusting screw, the support plate can be driven to move synchronously during the screwing process, so that the equipment can clamp and sort boxes of different sizes, and has strong applicability.

[0016] 2. A suction cup is provided. As the splint slides elastically, the second pull rope can pull the piston plate to slide inside the suction cup, thereby generating negative pressure between the suction cup and the logistics box, thereby achieving adsorption and fixation of the logistics box, thereby further improving the clamping stability of the logistics box.

[0017] A guide groove is further provided. As the adjustment plate moves, it can slide along the guide groove, so that the adjustment plate can adjust the height in the vertical direction, thereby driving the material box to separate from the surface of the conveyor belt, thereby avoiding the conveyor belt from being subjected to lateral force during the sorting process and causing large wear and position displacement.

[0018] 3. A sealing plug is provided. As the adjustment plate moves, the splint can move the logistics box to the second conveyor. At this time, the sealing plug will be close to the fixed frame. At this time, the sealing plug will move elastically under the magnetic force of the first magnetic block and the second magnetic block, thereby releasing the seal on the airway, and causing the suction cup to lose its adsorption effect. At this time, the logistics box will move downward under the action of gravity. At the same time, the friction force of the splint on the logistics box can prevent the box from falling too fast and causing large vibrations, thereby ensuring the transportation safety of the logistics items. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a side structural schematic diagram of the present invention; Figure 3 This is a schematic diagram of the connection structure between the fixing plate and the adjusting plate of the present invention; Figure 4 This is a schematic diagram of the guide plate installation structure of the present invention; Figure 5 This is a schematic diagram of the top view of the fixed plate and the adjustment plate of the present invention; Figure 6 This is a schematic diagram of the connection structure of the rotating plate, the supporting plate and the clamping plate of the present invention; Figure 7 This is a schematic diagram of a top cross-sectional structure of a splint and a suction cup of the present invention; Figure 8 This is a schematic diagram of a top cross-sectional structure of a suction cup and a piston plate of the present invention; Figure 9 For the present invention Figure 8 A in the middle is an enlarged structural diagram; Figure 10 For the present invention Figure 2 Enlarged structural diagram at point B in the middle.

[0020] In the figure: 1. First conveyor; 2. Detection module; 3. Second conveyor; 4. Fixed plate; 5. Electric telescopic rod; 6. Guide rail; 7. Slider; 8. Adjustment plate; 9. Guide plate; 10. Guide groove; 11. Guide fixing column; 12. Sleeve; 13. First return spring; 14. Rotating plate; 15. First pull rope; 16. Adjustment screw; 17. Support plate; 18. First guide rod; 19. Second guide rod; 20. Clamp; 21. Buffer spring; 22. Suction cup; 23. Piston plate; 24. Pull rod; 25. Second pull rope; 26. Air duct; 27. Sealing plug; 28. Second return spring; 29. ​​First magnetic block; 30. Fixed bracket; 31. Second magnetic block. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only 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 making creative efforts are within the scope of protection of the present invention.

[0022] Example 1: The existing warehouse logistics conveying device adopts direct pushing to change direction during use, which makes the friction between the logistics box and the conveyor belt greater, thereby accelerating the wear of the conveyor belt. In order to solve this technical problem, this embodiment discloses the following technical content, please refer to Figure 1-Figure 5 、 Figure 7-10 As shown; a conveying device for warehouse logistics with a sorting structure, comprising a first conveyor 1 and a second conveyor 3, and a detection module 2 is fixedly installed on the first conveyor 1; a fixed plate 4 is fixedly installed on the frame of the first conveyor 1, and an electric telescopic rod 5 is fixedly installed on the back of the fixed plate 4, and a guide rail 6 is fixedly installed on the output end of the electric telescopic rod 5, and an adjustment plate 8 is slidably installed on the guide rail 6, and a guide plate 9 is symmetrically fixedly installed on the outer side of the upper end of the fixed plate 4, and a guide groove 10 is opened through the guide plate 9, and the adjustment plate 8 and the guide groove 10 are slidably connected, and two rotating plates 14 are symmetrically and elastically rotatably installed on the adjustment plate 8, and a splint 20 is elastically connected to the outer side of the support plate 17, and an adsorption component for adsorbing the logistics box is installed on the splint 20.

[0023] A slider 7 is provided on the inner side of the guide rail 6 for sliding, and the slider 7 is provided in a T-shaped structure, and the slider 7 is fixedly installed on the back of the adjustment plate 8, and the adjustment plate 8 and the fixed plate 4 are arranged in parallel, and the upper end of the adjustment plate 8 is symmetrically provided with an axis structure, and the axis at the upper end of the adjustment plate 8 slides along the guide groove 10, and at the same time, the position height of one end of the guide groove 10 close to the fixed plate 4 is lower than the other end of the guide groove 10. When the adjustment plate 8 slides along the guide groove 10, it drives the slider 7 to slide upward on the inner side of the guide rail 6, and the outer side of the fixed plate 4 is symmetrically fixed with a guide fixing column 11, and the sliding sleeve of the guide fixing column 11 is provided with a sliding sleeve 12, and there is a gap between the sliding sleeve 12 and the fixed plate 4 A first return spring 13 is fixedly connected, a winding wheel structure is fixedly installed on the shaft of the rotating plate 14, and a first pull rope 15 is wound around the outside of the winding wheel, and the upper end of the first pull rope 15 is fixedly connected to the outside of the sliding sleeve 12, and the first pull rope 15 pulls the rotating plate 14 to rotate during the movement of the adjusting plate 8, and a second guide rod 19 is symmetrically slid through the support plate 17, and the end of the second guide rod 19 away from the rotating plate 14 is fixedly connected to the splint 20, and a buffer spring 21 is fixedly connected between the support plate 17 and the splint 20, and a rubber pad is fitted on the outside of the splint 20, and fits the outside of the logistics box. The adsorption component includes a fixed installation The suction cup 22 on the splint 20 is extended and penetrates the support plate 17, and the inner side of the suction cup 22 is connected with a piston piece 23 in an interference sliding manner. A spring is connected between the suction cup 22 and the piston piece 23. At the same time, a pull rod 24 is fixedly connected to the piston piece 23, and the pull rod 24 penetrates the suction cup 22. A second pull rope 25 is fixedly connected to the piston piece 23, and the end of the second pull rope 25 away from the piston piece 23 penetrates the suction cup 22 and is fixedly connected to the support plate 17. During the elastic sliding process of the splint 20, the second pull rope 25 pulls the piston piece 23 to slide on the inner side of the suction cup 22. At the same time, the suction cup 22 is adsorbed on the outer side of the logistics box. The piston piece 23 and the pull rod 24 are fixedly connected. An air duct 26 is provided through the pull rod 24, and the end of the pull rod 24 is elastically connected to a sealing plug 27 through a second return spring 28, and the sealing plug 27 blocks the end of the air duct 26. At the same time, a first magnetic block 29 is fixedly installed on the outside of the sealing plug 27, and a fixing frame 30 is fixedly installed on the frame of the second conveyor 3, and a second magnetic block 31 is fixedly connected to the outer side of the upper end of the fixing frame 30. During the movement and transportation of the splint 20, the pull rod 24 gradually approaches the fixing frame 30, and the magnetic poles of the opposite surfaces of the first magnetic block 29 and the second magnetic block 31 are opposite, and the first magnetic block 29 will drive the sealing plug 27 to slide elastically under the action of magnetic force to release the blockage of the air duct 26.

[0024] like Figure 1-Figure 2As shown, the logistics box is transported by the first conveyor 1. When the logistics box passes through the detection module 2, the detection module 2 detects the information of the logistics box, thereby controlling the electric telescopic rod 5 to work. When the logistics box is transported to the outside of the fixed plate 4, the electric telescopic rod 5 is started, so that the electric telescopic rod 5 pushes the guide rail 6, thereby driving the adjustment plate 8 to move synchronously. At this time, the shaft at the upper end of the adjustment plate 8 will slide along the guide groove 10 of the guide plate 9. At the same time, the sliding sleeve 12 will pull the rotating plate 14 to rotate through the first pull rope 15, so that the rotating plate 14 drives the support plate 17 and the splint 20 to approach the logistics box, thereby achieving stable clamping and fixation of the logistics box. At the same time, the splint 20 and the support plate 17 will be elastically telescopically adjusted to achieve compression of the buffer spring 21, thereby achieving a buffering effect. At this time, the suction cup 22 will be sealed and fit to the outside of the logistics box. As the positions of the splint 20 and the support plate 17 are The second pull rope 25 will pull the piston piece 23 on the inner side of the suction cup 22, so that the piston piece 23 can slide and adjust on the inner side of the suction cup 22 with interference fit, so that the suction cup 22 can stably adsorb the outer side of the logistics box. As the adjustment plate 8 continues to move, the adjustment plate 8 will slide up along the guide groove 10, so that the splint 20 can lift and transfer the clamped logistics box, so that the logistics box can move to the top of the second conveyor 3. At the same time, the sealing plug 27 on the pull rod 24 will gradually approach the fixed frame 30, so that the sealing plug 27 slides elastically under the magnetic force of the first magnetic block 29 and the second magnetic block 31, thereby releasing the blockage of the airway 26, so that the suction cup 22 loses its suction. At this time, the logistics box is only clamped by the splint 20, and then slides down. At this time, the friction generated by the splint 20 can slow down the logistics box to prevent it from falling too fast and causing damage to the logistics box and the conveyor belt.

[0025] Example 2: The technical content disclosed in this embodiment is a further improvement based on the above-mentioned Example 1. The existing warehouse logistics conveying device cannot be conveniently adjusted to adapt to the sorting and handling of logistics boxes of different sizes. In order to further solve this technical problem, this embodiment discloses the following technical content, such as Figure 4-Figure 6 As shown; the rotating plate 14 is connected to the support plate 17 through an adjusting assembly, the adjusting assembly includes an adjusting screw 16 that is threadedly connected to the rotating plate 14, and the adjusting screw 16 and the support plate 17 are rotatably connected, and a first guide rod 18 is symmetrically fixedly mounted on the support plate 17, and the first guide rod 18 is telescopically extended through the rotating plate 14.

[0026] By rotating the adjusting screw 16, the distance between the rotating plate 14 and the support plate 17 is adjusted during the screwing process of the adjusting screw 16. The first guide rod 18 will slide and adjust on the rotating plate 14 to achieve guidance to ensure structural stability, thereby achieving the distance between the two clamping plates 20 during the clamping process to achieve stable clamping of logistics boxes of different sizes, effectively improving the applicability of the equipment.

[0027] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0028] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A conveying device for storage logistics with a sorting structure, comprising a first conveyor (1) and a second conveyor (3), wherein a detection module (2) is fixedly mounted on the first conveyor (1); It is characterized by: A fixed plate (4) is fixedly mounted on the frame of the first conveyor (1), and an electric telescopic rod (5) is fixedly mounted on the back of the fixed plate (4), and a guide rail (6) is fixedly mounted on the output end of the electric telescopic rod (5), and an adjustment plate (8) is slidably mounted on the guide rail (6). A guide plate (9) is symmetrically fixedly mounted on the outer side of the upper end of the fixed plate (4), and a guide groove (10) is provided through the guide plate (9), and the adjustment plate (8) and the guide groove (10) are slidably connected. Two rotating plates (14) are symmetrically and elastically mounted on the adjusting plate (8), and the rotating plate (14) is connected to a support plate (17) through an adjustment component. The outer side of the support plate (17) is elastically connected to a clamping plate (20), and an adsorption component for adsorbing a logistics box is mounted on the clamping plate (20).

2. The storage logistics conveying device with a sorting structure according to claim 1, characterized in that: A slider (7) is slidably provided on the inner side of the guide rail (6), and the slider (7) is provided in a T-shaped structure. The slider (7) is fixedly mounted on the back side of the adjustment plate (8), and the adjustment plate (8) and the fixed plate (4) are provided in parallel.

3. The storage logistics conveying device with a sorting structure according to claim 2, characterized in that: The upper end of the adjusting plate (8) is symmetrically provided with an axis structure, and the axis at the upper end of the adjusting plate (8) slides along the guide groove (10), and at the same time, the height of one end of the guide groove (10) close to the fixed plate (4) is lower than the other end of the guide groove (10). When the adjusting plate (8) slides along the guide groove (10), it drives the slider (7) to slide upward on the inner side of the guide rail (6).

4. The storage logistics conveying device with a sorting structure according to claim 1, characterized in that: A guide fixing column (11) is symmetrically fixedly mounted on the outer side of the fixing plate (4), and a sliding sleeve of the guide fixing column (11) is provided with a sliding sleeve (12), and a first return spring (13) is fixedly connected between the sliding sleeve (12) and the fixing plate (4).

5. The storage logistics conveying device with a sorting structure according to claim 4, characterized in that: A winding wheel structure is fixedly mounted on the shaft of the rotating plate (14), and a first pull rope (15) is wound around the outer side of the winding wheel. The upper end of the first pull rope (15) is fixedly connected to the outer side of the sliding sleeve (12), and the first pull rope (15) pulls the rotating plate (14) to rotate during the movement of the adjustment plate (8).

6. The storage logistics conveying device with a sorting structure according to claim 1, characterized in that: The adjustment assembly comprises an adjustment screw (16) threadedly connected to the rotating plate (14), and the adjustment screw (16) and the support plate (17) are rotatably connected, and a first guide rod (18) is symmetrically fixedly mounted on the support plate (17), and the first guide rod (18) is telescopically connected to the rotating plate (14).

7. The storage logistics conveying device with a sorting structure according to claim 1, characterized in that: A second guide rod (19) is symmetrically slidably passed through the support plate (17), and an end of the second guide rod (19) away from the rotating plate (14) is fixedly connected to a clamping plate (20), and a buffer spring (21) is fixedly connected between the support plate (17) and the clamping plate (20), and a rubber pad is provided on the outer side of the clamping plate (20) and is in contact with the outer side of the logistics box.

8. The storage logistics conveying device with a sorting structure according to claim 1, characterized in that: The adsorption assembly includes a suction cup (22) fixedly mounted on the clamp (20), and the suction cup (22) is telescopically extended through the support plate (17), and the inner side of the suction cup (22) is connected to a piston plate (23) in an interference sliding manner, a spring is connected between the suction cup (22) and the piston plate (23), and a pull rod (24) is fixedly connected to the piston plate (23), and the pull rod (24) passes through the suction cup (22), a second pull rope (25) is fixedly connected to the piston plate (23), and the end of the second pull rope (25) away from the piston plate (23) passes through the suction cup (22) and the support plate (17) and is fixedly connected, and during the elastic sliding process of the clamp (20), the second pull rope (25) pulls the piston plate (23) to slide on the inner side of the suction cup (22), and the suction cup (22) is adsorbed on the outer side of the logistics box.

9. The storage logistics conveying device with a sorting structure according to claim 8, characterized in that: An air passage (26) is provided through the piston plate (23) and the pull rod (24), and the end of the pull rod (24) is elastically connected to a sealing plug (27) through a second return spring (28), and the sealing plug (27) blocks the end of the air passage (26). At the same time, a first magnetic block (29) is fixedly installed on the outer side of the sealing plug (27). A fixing frame (30) is fixedly installed on the frame of the second conveyor (3), and a second magnetic block (31) is fixedly connected to the outer side of the upper end of the fixing frame (30). During the movement and transportation of the splint (20), the pull rod (24) gradually approaches the fixing frame (30), and the magnetic poles of the opposite surfaces of the first magnetic block (29) and the second magnetic block (31) are opposite, and the first magnetic block (29) will drive the sealing plug (27) to slide elastically under the action of magnetic force to release the blockage of the air passage (26).

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