Round belt double-layer shunting conveying system

Abstract

The utility model discloses a round belt double-layer shunting conveying system which is characterized in that the conveying directions of a second conveying line body and third conveying line bodies are the same, the third conveying line bodies are arranged right above the second conveying line body at intervals in the vertical direction, and the conveying direction of a first conveying line body is horizontally perpendicular to the second conveying line body; the height of the conveying plane of the first conveying line body is the same as that of the conveying plane of the second conveying line body, the first conveying line body, the second conveying line body and the third conveying line body can be in butt joint through a round belt turning jacking device, and a round belt turning unit of the round belt jacking device is driven by a driving mechanism of the first conveying line body to operate. The round belt turning jacking device has the beneficial effects that the round belt turning jacking device is adopted to complete conveying of objects between the conveying line bodies with different heights, the round belt turning unit is matched with the jacking unit to move up and down, the conveying height and the conveying direction of the objects are changed, and the round belt turning unit does not need to be additionally provided with a driving device; the driving mechanism of the conveying line body is used for driving, and cost is saved.

Description

Technical Field

[0001] The present application is applied to the field of automated conveying, and specifically relates to a round belt double-layer diversion conveying system. Background Art

[0002] In the field of automated conveying, there is a common demand to divert the load from one conveyor line to two conveyor lines at different heights. In the prior art, a lifting and transverse shifting device or a turntable device in conjunction with a lifting mechanism is often used to lift and divert the load. The above devices are relatively complex in structure and require a power system, resulting in high costs. Summary of the invention

[0003] In view of the above reasons, the present application discloses a round belt double-layer diversion conveying system, including a first conveying line body, a second conveying line body, a third conveying line body and a round belt turning and lifting device, the second conveying line body and the third conveying line body have the same conveying direction, the third conveying line body is arranged vertically and spaced directly above the second conveying line body, the conveying direction of the first conveying line body is horizontally perpendicular to the second conveying line body, the conveying plane height of the first conveying line body is the same as the conveying plane height of the second conveying line body, the first conveying line body, the second conveying line body and the third conveying line body can be connected through the round belt turning and lifting device, the round belt turning The lifting device includes a round belt turning unit and a lifting unit. The lifting unit can drive the round belt turning unit to move up and down in the vertical direction. When the round belt turning unit is in the first position under the action of the lifting unit, the conveying plane of the round belt turning unit is at the same height as the conveying plane of the first conveying line body and is connected to the first conveying line body and the second conveying line body at the same time. When the round belt transfer unit is in the second position under the action of the lifting unit, the conveying plane of the round belt turning unit is at the same height as the conveying plane of the third conveying line body and is connected to the third conveying line body. The round belt turning unit is driven and operated by the driving mechanism of the first conveying line body.

[0004] Preferably, the round belt turning unit includes a round belt, a round belt guide plate, a driving wheel and a driven wheel, the driving wheel is arranged on the driving shaft of the first conveyor line body, the driving shaft is driven by the motor of the first conveyor line body, the driven wheel is arranged on the side of the round belt guide plate close to the second conveyor line body, the round belt guide plate is provided with a round belt guide groove, the guiding direction of the round belt guide groove is a horizontal 90-degree arc from the first conveyor line body to the second conveyor line body, the round belt is sleeved between the driving wheel and the driven wheel, and partially placed in the round belt guide groove, and the upper end surface height of the round belt is higher than the plane of the round belt guide plate.

[0005] Preferably, it includes a first tensioning mechanism, which is arranged below the round belt guide plate, and the first tensioning mechanism includes a first fixed seat, a second fixed seat, a connecting rod, a spring, a slider and a first tensioning wheel. The first fixed seat and the second fixed seat are arranged opposite to each other, and the connecting rod is arranged between the first fixed seat and the second fixed seat. The length direction of the connecting rod is the conveying direction of the second conveying line body, the slider is sleeved on the connecting rod and can slide on the connecting rod, the first tensioning wheel is arranged on the slider, and the spring is provided between the slider and the second fixed seat, the spring is sleeved on the connecting rod and abuts against the slider and the second fixed seat, the round belt is wound around the first tensioning wheel in the return stage, and when the round belt guide plate is in the second position, the compression of the spring is greater than the compression of the spring when the round belt guide plate is in the first position.

[0006] Preferably, a plurality of return guide wheels are provided below the round belt guide plate, and the round belt passes around the return guide wheels during the return stage.

[0007] Preferably, a plurality of guide wheel accommodating grooves are provided on both sides of the round belt guide groove, and the outward guide wheels are horizontally arranged in the guide wheel accommodating grooves and abut against both sides of the round belt.

[0008] Preferably, it also includes a second tensioning mechanism, which includes a second tensioning wheel, a third tensioning wheel and a tensioning wheel bracket, the second tensioning wheel and the third tensioning wheel are arranged on the side of the round belt turning unit close to the first conveyor line body through the tensioning wheel bracket, the second tensioning wheel is located above the third tensioning wheel, the round belt is passed through the second tensioning wheel in the outward stage and then placed on the round belt guide plate, and the round belt is passed through the third tensioning wheel in the return stage and then placed on the driving wheel.

[0009] Preferably, the lifting unit includes a lifting plate, a bottom plate and a cylinder, the bottom plate is fixedly connected to the first conveyor line body and the second conveyor line body respectively, the lifting plate is located above the bottom plate, the free end of the cylinder is fixedly connected to the bottom plate, the fixed end of the cylinder is fixedly connected to the lifting plate, the lifting plate is fixedly connected to the lower end of the round belt guide plate, and the cylinder drives the round belt guide plate to move up and down in the vertical direction.

[0010] Preferably, a fixed bracket is provided at the lower end of the base plate, the free end of the cylinder passes through the base plate and is floatingly connected to the fixed bracket through a floating joint, a guide column is provided under the lifting plate, and a linear bearing is provided at a corresponding position of the base plate, the length direction of the guide column and the linear bearing is perpendicular to the ground direction, and the guide column passes through the linear bearing.

[0011] Preferably, an outer arc guide plate is provided on the outer arc side of the round belt guide plate, and inner arc guide plates are respectively provided on the inner arc side of the round belt guide plate near the joints between the second conveyor line body and the third conveyor line body and the round belt turning unit, and both the outer arc guide plate and the inner arc guide plate are contoured shapes of the moving edges of the load on the round belt guide plate.

[0012] Preferably, the round belt turning unit is provided with a parking device on one side close to the second conveyor line body.

[0013] The advantage of the present application is that a round belt turning and lifting device is used to transport the load between conveyor lines at different heights. The round belt turning unit is used in conjunction with the lifting unit to move up and down to change the conveying height and conveying direction of the load. The structure is simple, and the round belt turning unit does not need to be equipped with a drive device itself. It is driven by the driving mechanism of the conveyor line, which saves costs and can ensure that the round belt turning unit and the conveyor line run at the same speed, thereby improving the rhythm and ensuring stable transportation.

[0014] Other specific features and specific advantages of the present disclosure will be set forth in the following description, or some features and advantages may be inferred or unambiguously determined from the description, or may be learned by implementing the above-mentioned technology of the present disclosure.

[0015] In order to make the above-mentioned objectives, features and advantages of the present disclosure more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a schematic diagram of the structure of this application.

[0018] Figure 2 This is another state structure schematic diagram of the present application.

[0019] Figure 3 This is a schematic diagram of the structure of the round belt turning and lifting device of this application.

[0020] Figure 4 This is the front view of the round belt turning and lifting device structure of this application.

[0021] Figure 5 This is a schematic diagram of the circular belt turning unit structure of this application.

[0022] Figure 6 This is a bottom view of a circular belt turning unit in this application.

[0023] Figure 7 This is a bottom view of the circular belt turning unit in another state of the present application.

[0024] Figure 8 This is a schematic diagram of the round belt guide plate structure of this application.

[0025] Fig. 9 This is a structural diagram of the present application.

[0026] In the figure: 1. first conveyor line body; 2. second conveyor line body; 3. third conveyor line body; 4. round belt turning unit; 5. lifting unit; 6. round belt; 7. round belt guide plate; 701. round belt guide groove; 702. guide wheel accommodating groove; 8. driving wheel; 9. driven wheel; 10. driving shaft; 11. outward guide wheel; 12. return guide wheel; 13. lifting plate; 14. bottom plate; 15. cylinder; 16. first fixed seat; 17. second fixed seat; 18. connecting rod; 19. spring; 20. slider; 21. first tensioning wheel; 22. fixed bracket; 23. floating joint; 24. guide column; 25. linear bearing; 26. second tensioning wheel; 27. third tensioning wheel; 28. tensioning wheel bracket; 29. ​​outer arc guide plate; 30. inner arc guide plate; 31. parking device. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. 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.

[0028] like Figure 1 and Figure 2As shown, the first conveyor line body 1, the second conveyor line body 2 and the third conveyor line body 3 are all sheet-based belt conveyors. In other embodiments, they can also be other conventional conveyors, such as belt conveyors, chain conveyors, etc., without specific restrictions herein. The conveying directions of the second conveyor line body 2 and the third conveyor line body 3 are the same, and can be arranged at intervals in the vertical direction through supporting profiles. The third conveyor line body 3 is arranged directly above the second conveyor line body 2 to form a double-layer conveyor line body. The conveying direction of the first conveyor line body 1 is horizontally perpendicular to the conveying directions of the second conveyor line body 2 and the third conveyor line body 3, that is, relative Rotate horizontally 90 degrees, the conveying plane height of the first conveyor line body 1 is the same as the conveying plane height of the second conveyor line body 2, the round belt turning and lifting device includes a round belt turning unit 4 and a lifting unit 5, the round belt turning unit 4 is arranged above the lifting unit 5, and the lifting unit 5 can drive the round belt turning unit 4 to move up and down in the vertical direction, and the round belt turning unit 4 can be connected with the first conveyor line body 1, the second conveyor line body 2 or the third conveyor line body 3, that is, the round belt turning unit 4 can connect the first conveyor line body 1 with the second conveyor line body 2, and can also connect the first conveyor line body 1 with the third conveyor line body 3. Figure 1 As shown, when the round belt turning unit 4 is in a low stroke position, i.e., the first position, under the action of the lifting unit 5, the conveying plane of the round belt turning unit 4 is at the same height as the conveying planes of the first conveying line body 1 and the second conveying line body 2, the feeding end of the round belt turning unit 4 is docked with the first conveying line body 1, and the discharging end of the round belt turning unit 4 is docked with the second conveying line body 2, and the load is driven by the round belt turning unit 4 to rotate horizontally 90 degrees from the first conveying line body 1 to the second conveying line body 2; Figure 2 As shown, when the round belt turning unit 4 is in a high stroke position, i.e., the second position, under the action of the lifting unit 5, the conveying plane of the round belt turning unit 4 rises to be the same as the conveying plane of the third conveying line body 3, the discharge end of the round belt turning unit 4 is docked with the third conveying line body 3, and the load is conveyed from the first conveying line body 1 to the round belt turning unit 4 located at the first position. The round belt turning unit 4 is lifted to the second position by the lifting unit 5, and the load is conveyed to the third conveying line body 3 through the round belt turning unit 4. The height of the round belt turning unit 4 is controlled by using the lifting unit 5, thereby controlling the load to be diverted from the first conveying line body 1 to the second conveying line body 2 or the third conveying line body 3.

[0029] The above-mentioned round belt turning unit 4 itself does not include a motor drive device, but uses the driving mechanism of the first conveyor line body 1 to drive the load to turn, without the need to install an additional self-driving device. At the same time, the conveying direction and conveying speed of the round belt turning unit 4 can be consistent with the conveying speed of the first conveyor line body 1, thereby ensuring the stable transportation of the load during the diversion process.

[0030] In some embodiments, Figures 3 to 6 ,and Figure 8As shown, the round belt turning unit 4 includes a round belt 6, a round belt guide plate 7, a driving wheel 8 and a driven wheel 9. The round belt 6 is an endless belt with a circular cross-section, has a certain elasticity and a certain friction coefficient, and the round belt guide plate 7 has a round belt guide groove 701 that is recessed downward relative to the upper surface. The round belt guide groove 701 can accommodate the lower part of the round belt 6 and guide the moving direction of the round belt 6. When the round belt 6 is placed in the round belt guide groove 701, the upper end surface height of the round belt 6 will be higher than the plane height of the round belt guide plate 7, so that it contacts the lower surface of the load and drives the load to move. The guiding direction of the round belt guide groove 701 is from the conveying centerline position of the first conveying line body 1 to the conveying centerline position of the second conveying line body 2, that is, the guiding direction is to turn 90 degrees from the conveying direction of the first conveying line body 1 to the conveying direction of the second conveying line body 2, and the round belt guide groove 701 is 9 The arc is 0 degrees, the driving wheel 8 is arranged on the driving shaft 10 of the first conveyor line body 1, and the driving shaft 10 is driven by the motor of the first conveyor line body 1. While driving the first conveyor line body 1 to run, it also drives the driving wheel 8 to run. If the driving wheel 8 and the line driving wheel diameter of the first conveyor line body 1 are consistent, the conveying speed of the round belt 6 will be consistent with the conveying speed of the first conveyor line body 1. The conveying speed of the round belt 6 relative to the first conveyor line body 1 can be adjusted by adjusting the diameter of the driving wheel 8. The driven wheel 9 is arranged on the side of the round belt guide plate 7 close to the second conveyor line body 2 through the mounting part. The driving wheel 8 and the driven wheel 9 are both vertically arranged. The round belt 6 successively bypasses the driving wheel 8, the round belt guide groove 701, the driven wheel 9 and returns to the driving wheel 8 from the bottom of the round belt guide plate 7, so that the round belt turning unit 4 has conveying power.

[0031] In some embodiments, Figure 2 and Figure 8 As shown, a plurality of guide wheel accommodating grooves 702 are provided on both sides of the round belt guide groove 701. The outward guide wheel 11 can be horizontally arranged in the guide wheel accommodating groove 702 and can rotate freely. The part of the round belt 6 placed in the round belt guide groove 701 will abut against and roll with the outward guide wheels 11 on both sides, thereby reducing the speed loss of the round belt 6 and reducing the wear and consumption of the round belt 6.

[0032] In some embodiments, Figures 3 to 9 A return guide wheel 12 is provided below the round belt guide plate 7 shown. The round belt 6 is wound around the return guide wheel 12 during its return phase, thereby fixing the moving position of the round belt 6 during its return phase. The return guide wheel 12 is a free wheel and is arranged horizontally. The round belt 6 is sequentially wound around the driving wheel 8, the round belt guide groove 701, the driven wheel 9, the return guide wheel 12 and the driving wheel 8.

[0033] In some embodiments, Figures 3 to 8As shown, the lifting unit 5 includes a lifting plate 13, a bottom plate 14 and a cylinder 15. The bottom plate 14 is fixedly connected to the lower ends of the first conveyor line body 1 and the second conveyor line body 2, respectively. The lifting plate 13 is spaced above the bottom plate 14. The free end of the cylinder 15 is vertically downward relative to the fixed end. The free end of the cylinder 15 is fixedly connected to the bottom plate 14. The fixed end of the cylinder 15 is fixedly connected to the lower end of the lifting plate 13. The upper surface of the lifting plate 13 is fixedly connected to the lower surface of the round belt guide plate 7. The cylinder 15 can drive the lifting plate 13 and the round belt guide plate 7 to move up and down in the vertical direction, so that the round belt guide plate 7 stays at the first position and the second position.

[0034] In some embodiments, Figures 2 to 8 As shown, one side of the round belt 6 close to the feed end is wound around the driving wheel 8, so the relative position of this end will not change, and the length of the round belt 6 will change height as it moves from the first position to the second position, and the round belt 6 will be stretched. Some round belts 6 made of special materials can withstand this degree of stretching, and some conventional round belts 6 will have the risk of loosening and breaking due to exceeding their elastic coefficients. Therefore, a first tensioning mechanism is provided to solve the above problem. The first tensioning mechanism is provided below the round belt guide plate 7, and specifically acts on the return stage of the round belt 6. The first tensioning mechanism includes a first fixed seat 16, a second fixed seat 17, a connecting rod 18, a spring 19, a slider 20 and a first tensioning wheel 21. The first fixed seat 16 and the second fixed seat 17 are relatively arranged below the jacking plate 13 That is, it is also located below the round belt guide plate 7. Two parallel connecting rods 18 are fixed between the first fixed seat 16 and the second fixed seat 17. The connecting rod 18 is a straight rod. The length direction of the connecting rod 18 can be the same as the conveying direction of the second conveyor line body 2. A slider 20 is sleeved on the connecting rod 18. The slider 20 can move freely on the connecting rod 18. At the same time, a spring 19 is sleeved on the connecting rod 18. One end of the spring 19 is fixedly connected to the slider 20, and the other end of the spring 19 is fixedly connected to the second fixed seat 17. As shown in the figure, when the spring 19 is in a free state, the spring 19 will push the slider 20 to the first fixed seat 16 and make the two abut against each other. The first tensioning wheel 21 is freely set horizontally on the slider 20, and the round belt 6 is wound around the first tensioning wheel 21 during the return stage. Figure 6 As shown, when the round belt guide plate 7 is in the first position, the slider 20 is closer to the first fixed seat 16, the spring 19 is in a slightly compressed state, and the first tensioning wheel 21 consumes part of the length of the round belt to ensure that the round belt 6 is tensioned during operation; when the round belt guide plate 7 moves from the first position to the second position, as shown Figure 7As shown, the round belt 6 is subjected to the stretching force, and the return stage of the round belt 6 will drive the first tensioning wheel and thus drive the slider 20 to move toward the second fixed seat 17, further compressing the spring 19, thereby releasing more length of the round belt 6 to ensure the normal operation of the round belt 6; when the round belt guide plate 7 moves from the second position to the first position, the stretching force on the round belt 6 gradually decreases, and under the action of the restoring force of the spring 19, the slider 20 will move in the direction away from the second fixed seat 17, and the round belt 6 can still remain tensioned and will not loosen or fall off. The above embodiment can realize the operation state of the round belt 6 with a conventional elastic coefficient, so that the round belt 6 is always in a tensioned state, saving costs and ensuring stable operation of the system.

[0035] In some embodiments, Figure 3 and Figure 4 As shown, a fixed bracket 22 is provided at the lower end of the base plate 14, and the free end of the cylinder 15 passes through the preset hole of the base plate 14 and is floatingly connected to the fixed bracket 22 through a floating joint 23. This structural design can effectively reduce the spacing distance between the base plate 14 and the lifting plate 13, saving space, and adopting a floating connection to reduce the radial force received by the cylinder 15, thereby increasing the service life of the cylinder 15. Guide columns 24 are fixed downward at the four corners of the lifting plate 13, and linear bearings 25 are penetrated at corresponding positions of the base plate 14. The guide columns 24 are penetrated in the linear bearings 25 and are matched with the linear bearings 25 to play a guiding role in the vertical displacement process.

[0036] In some embodiments, a second tensioning mechanism is further provided, such as Figures 3 to 8 As shown, the second tensioning mechanism includes a second tensioning wheel 26, a third tensioning wheel 27 and a tensioning wheel bracket 28. The tensioning wheel bracket 28 is arranged on the side of the jacking plate 13 close to the first conveyor line body 1 and is placed between the jacking plate 13 and the driving wheel 8. The second tensioning wheel 26 and the third tensioning wheel 27 are freely arranged on the tensioning wheel bracket 28 in the upper and lower structures. The second tensioning wheel 26 acts on the outward stage of the round belt 6, and the third tensioning wheel 27 acts on the return stage of the round belt 6. The round belt 6 is sequentially wound around the driving wheel 8, the second tensioning wheel 26, the round belt guide groove 701, the driven wheel 9, the return guide wheel 12, the first tensioning wheel 21, the return guide wheel 12, the third tensioning wheel 27 to the driving wheel 8. The second tensioning wheel 26 and the third tensioning wheel 27 play an auxiliary tensioning role on the round belt 6. Since the round belt 6 is driven by the cylinder 15 to move up and down, it will come out to prevent the round belt 6 from loosening when it is in the first position.

[0037] In some embodiments, Figure 2 and Figure 3As shown, the direction of the round belt guide plate 7 relative to the top of the arc of the round belt guide groove 701 is the outer arc side, and the direction relative to the center of the arc of the round belt guide groove 701 is the inner arc side. The outer arc side of the round belt guide plate 7 is provided with an outer arc guide plate 29, and the outer arc guide plate 29 is an arc plate. The arc shape of the outer arc guide plate 29 is the imitation shape of the outer edge moving trajectory when the load moves on the round belt guide plate 7. Inner arc guide plates 30 are respectively provided near the inner arc side on the second conveyor line body 2 and the third conveyor line body 3. The arc shape of the inner arc guide plate 30 is the imitation shape of the inner edge moving trajectory when the load moves on the round belt guide plate 7. The heights of the outer arc guide plate 29 and the inner arc guide plate 30 are both higher than the conveying plane where they are located, which plays a guiding role in the turning process of the load and prevents the load from moving out of the fixed conveying trajectory during the turning process.

[0038] In some embodiments, Figure 1 and Fig. 9 As shown, the discharging end of the round belt turning unit 4, i.e., one end close to the second conveyor line body 2 and the third conveyor line body 3, is provided with a stop and release device 31. The stop and release device 31 can stop the load on the round belt guide plate 7 to prevent the load from moving out of the round belt guide plate 7 when the docking is not complete, causing chuck or falling, thereby further improving the stability and safety of the system transportation.

[0039] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0040] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present invention, which are used to illustrate the technical solutions of the present invention rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the aforementioned embodiments, those of ordinary skill in the art should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the aforementioned embodiments within the technical scope disclosed by the present invention, or can easily conceive of changes, or make equivalent replacements for some of the technical features therein. Such modifications, changes or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the protection scope of the present invention.

Claims

1. A round belt double-layer diversion conveying system, characterized in that: The invention comprises a first conveyor line body (1), a second conveyor line body (2), a third conveyor line body (3) and a round belt turning and lifting device, wherein the second conveyor line body (2) and the third conveyor line body (3) have the same conveying direction, the third conveyor line body (3) is arranged vertically at a distance directly above the second conveyor line body (2), the conveying direction of the first conveyor line body (1) is horizontally perpendicular to the second conveyor line body (2), the conveying plane height of the first conveyor line body (1) is the same as the conveying plane height of the second conveyor line body (2), the first conveyor line body (1), the second conveyor line body (2) and the third conveyor line body (3) can be butted together through the round belt turning and lifting device, and the round belt turning and lifting device comprises a round belt turning unit (4) and a lifting device. A lifting unit (5) is provided, wherein the lifting unit (5) can drive the round belt turning unit (4) to move up and down in a vertical direction. When the round belt turning unit (4) is in a first position under the action of the lifting unit (5), the conveying plane of the round belt turning unit (4) is at the same height as the conveying plane of the first conveying line body (1) and is simultaneously connected to the first conveying line body (1) and the second conveying line body (2). When the round belt turning unit (4) is in a second position under the action of the lifting unit (5), the conveying plane of the round belt turning unit (4) is at the same height as the conveying plane of the third conveying line body (3) and is connected to the third conveying line body (3). The round belt turning unit (4) is driven and operated by the driving mechanism of the first conveying line body (1).

2. The round belt double-layer diversion conveying system according to claim 1 is characterized in that: The round belt turning unit (4) comprises a round belt (6), a round belt guide plate (7), a driving wheel (8) and a driven wheel (9); the driving wheel (8) is arranged on a driving shaft (10) of the first conveyor line body (1); the driving shaft (10) is driven by a motor of the first conveyor line body (1); the driven wheel (9) is arranged on a side of the round belt guide plate (7) close to the second conveyor line body (2); the round belt guide plate (7) is provided with a round belt guide groove (701); the guiding direction of the round belt guide groove (701) is a horizontal 90-degree arc from the first conveyor line body (1) to the second conveyor line body (2); the round belt (6) is sleeved between the driving wheel (8) and the driven wheel (9) and is partially placed in the round belt guide groove (701); the upper end surface of the round belt (6) is higher than the plane of the round belt guide plate (7).

3. The round belt double-layer diversion conveying system according to claim 2 is characterized in that: The invention comprises a first tensioning mechanism, which is arranged below the round belt guide plate (7), and comprises a first fixed seat (16), a second fixed seat (17), a connecting rod (18), a spring (19), a slider (20) and a first tensioning wheel (21). The first fixed seat (16) and the second fixed seat (17) are arranged opposite to each other, the connecting rod (18) is arranged between the first fixed seat (16) and the second fixed seat (17), the length direction of the connecting rod (18) is the conveying direction of the second conveying line body (2), and the slider (20) is sleeved on the connecting rod (1 8) and can slide on the connecting rod (18), the first tensioning wheel (21) is arranged on the slider (20), the spring (19) is arranged between the slider (20) and the second fixed seat (17), the spring (19) is sleeved on the connecting rod (18) and abuts against the slider (20) and the second fixed seat (17), the round belt (6) is wound around the first tensioning wheel (21) in the return stage, and when the round belt guide plate (7) is in the second position, the compression amount of the spring (19) is greater than the compression amount of the spring (19) when the round belt guide plate (7) is in the first position.

4. The round belt double-layer diversion conveying system according to claim 3 is characterized in that: A plurality of return guide wheels (12) are provided below the round belt guide plate (7), and the round belt (6) passes around the return guide wheels (12) during the return phase.

5. The round belt double-layer diversion conveying system according to claim 3 is characterized in that: A plurality of guide wheel receiving grooves (702) are provided on both sides of the round belt guide groove (701), and the outward guide wheel (11) is horizontally arranged in the guide wheel receiving groove (702) and abuts against both sides of the round belt (6).

6. The round belt double-layer diversion conveying system according to claim 3 is characterized in that: The invention also comprises a second tensioning mechanism, which comprises a second tensioning wheel (26), a third tensioning wheel (27) and a tensioning wheel bracket (28). The second tensioning wheel (26) and the third tensioning wheel (27) are arranged on a side of the round belt turning unit (4) close to the first conveyor line body (1) through the tensioning wheel bracket (28). The second tensioning wheel (26) is located above the third tensioning wheel (27). In the outward phase of the round belt (6), the second tensioning wheel (26) is wound around the second tensioning wheel (26) and then placed on the round belt guide plate (7). In the return phase of the round belt (6), the third tensioning wheel (27) is wound around the third tensioning wheel (27) and then placed on the driving wheel (8).

7. The round belt double-layer diversion conveying system according to claim 2 is characterized in that: The lifting unit comprises a lifting plate (13), a bottom plate (14) and a cylinder (15); the bottom plate (14) is fixedly connected to the first conveyor line body (1) and the second conveyor line body (2), respectively; the lifting plate (13) is located above the bottom plate (14); the free end of the cylinder (15) is fixedly connected to the bottom plate (14); the fixed end of the cylinder (15) is fixedly connected to the lifting plate (13); the lifting plate (13) is fixedly connected to the lower end of the round belt guide plate (7); and the cylinder (15) drives the round belt guide plate (7) to move up and down in the vertical direction.

8. The round belt double-layer diversion conveying system according to claim 7 is characterized in that: A fixed bracket (22) is provided at the lower end of the base plate (14); the free end of the cylinder (15) passes through the base plate (14) and is floatingly connected to the fixed bracket (22) via a floating joint (23); a guide column (24) is provided below the lifting plate (13); a linear bearing (25) is provided at a corresponding position of the base plate (14); the length direction of the guide column (24) and the linear bearing (25) is perpendicular to the ground, and the guide column (24) passes through the linear bearing (25).

9. The round belt double-layer diversion conveying system according to any one of claims 2 to 8, characterized in that: An outer arc guide plate (29) is provided on the outer arc side of the round belt guide plate (7), and inner arc guide plates (30) are provided on the inner arc sides of the second conveyor line body (2) and the third conveyor line body (3) close to the round belt guide plate (7) at the joints with the round belt turning unit (4). Both the outer arc guide plate (29) and the inner arc guide plate (30) are shaped like the moving edge of the object on the round belt guide plate (7).

10. The round belt double-layer diversion conveying system according to claim 9, characterized in that: The round belt turning unit (4) is provided with a stop and release device (31) on one side close to the second conveyor line body (2).

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