Feeding equipment capable of quickly identifying front and back surfaces of product

Abstract

The invention belongs to the technical field of feeding equipment, and discloses feeding equipment capable of quickly identifying the front and back surfaces of a product, the feeding equipment comprises a main conveying belt and a fixedly arranged separation frame, a middle channel and a side channel are formed at the feeding end of the main conveying belt through the separation frame, a communication port is formed between the middle channel and the side channel, and a discharging channel is formed at the discharging end of the main conveying belt; the middle channel and the side channel are both communicated with the discharging channel, a side discharging opening is formed in the discharging channel, an identification unit is arranged on the outer side of a communication opening, and a turn-over unit is arranged on the outer side of the main conveying belt; the identification unit comprises a side blowing pipe which is fixedly arranged, and the side blowing pipe communicates with an external air pump and is located on the outer side of the communicating opening; during working, air flow of the side blowing pipe at the communication port is blown to the side channel from the middle channel; according to the material conveying device, the materials are recognized and separated through the recognition unit, then the separated materials are turned over through the turn-over unit, finally, the conveyed materials are kept consistent in front face or back face, and follow-up operation is facilitated.

Description

Technical Field

[0001] The invention belongs to the technical field of feeding equipment, and in particular relates to a feeding equipment for quickly identifying the front and back of a product. Background Art

[0002] The ceramic sealing sheet used on the plasma separation cup refers to a ceramic gasket used in medical devices such as the plasma separation cup. It has excellent electrical insulation properties and can prevent problems such as static interference or leakage that may occur during the plasma separation process, ensuring the normal operation and safe use of the equipment.

[0003] Sealing function: In plasma separation cups, ceramic pads are usually used in the joints between various components, such as the joints between the cup lid and the cup body, the cup body and the base, etc., to play a sealing role to prevent blood or plasma from leaking during the separation process, ensuring that the separation process is carried out in a closed environment, and avoiding cross infection and plasma waste.

[0004] Thermal insulation effect: It can isolate the heat generated during the plasma separation process to a certain extent, preventing heat from being transferred to the surrounding environment or other components, helping to maintain a stable temperature inside the plasma separation cup, ensuring the separation effect, and also protecting operators from burns.

[0005] Support and Cushioning: Provides stable support for the various components of the plasma cup, enabling them to maintain their correct relative positions and ensuring the structural stability of the plasma cup during centrifugation. In addition, it can also play a certain cushioning role during equipment operation, reducing vibration and friction between components, reducing noise and wear.

[0006] Before feeding the ceramic sealing sheet products into the grinding machine, the front and back sides of the products need to be distinguished and neatly stacked into trays. This requires a feeding device that can quickly identify the front and back sides of the products. The equipment developed by the company uses mechanical means to distinguish ceramic sealing sheets. It is more efficient than using artificial intelligence recognition machines on the current market, has a lower cost, and has a faster recognition speed. Summary of the Invention

[0007] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a feeding device that can quickly identify the front and back of a product, which effectively solves the problem of the slow recognition process of artificial intelligence recognition machines on the market.

[0008] To achieve the above-mentioned object, the present invention provides the following technical solution: a feeding device for quickly identifying the front and back of a product, comprising a main conveyor belt and a fixed partition frame, wherein the feed end of the main conveyor belt is formed with a middle channel and a side channel through the partition frame, a communication port is formed between the middle channel and the side channel, a discharge channel is formed at the discharge end of the main conveyor belt, the middle channel and the side channel are both connected to the discharge channel, a side discharge port is formed on the discharge channel, an identification unit is provided on the outside of the communication port, and a flip unit is provided on the outside of the main conveyor belt; The identification unit includes a fixed side blowing pipe, which is connected to an external air pump and is located outside the connecting port. When working, the airflow of the side blowing pipe at the connecting port is blown from the middle channel to the side channel.

[0009] Preferably, an identification unit is also provided at the discharge channel, and the airflow of the side blowing pipe at the discharge channel is blown from the discharge channel to the side outlet.

[0010] Preferably, the front and back sides of the material conveyed by the main conveyor belt have different contact areas with the main conveyor belt, and the blowing force of the side blow pipe makes the material with a large contact area remain stationary on the main conveyor belt, while the material with a small contact area is offset.

[0011] Preferably, a suction hole area is formed on the main conveyor belt, and two fixed vacuum suction cups are provided on the inner side of the main conveyor belt. One vacuum suction cup is located below the connecting port area on the middle channel, and the other vacuum suction cup is located below the side discharge port area on the discharge channel. Both vacuum suction cups are connected to an external vacuum pumping device.

[0012] Preferably, the material is a sealing sheet made of ceramic material, a center hole is formed at the center of the sealing sheet, the front side of the sealing sheet is flat, and an inner groove is formed on the back side of the sealing sheet, and the inner groove is coaxially connected to the center hole.

[0013] Preferably, the identification unit further includes a fixed laser emitter, which is located above the communication port.

[0014] Preferably, the partition frame is inclined relative to the length direction of the main conveyor belt, and the flipping unit includes a baffle, an outer partition and an inner partition, which are all fixed and arranged in sequence from the outside to the inside of the main conveyor belt. The inner partition is fixed to the partition frame, and an inclined slope is formed at one end of the outer partition. The longitudinal dimension of the end of the inclined slope close to the baffle gradually increases to the longitudinal dimension of the end of the inclined slope away from the baffle; from the perspective of the discharge end of the main conveyor belt, the ends of the outer partition and the inner partition away from the baffle are twisted in a clockwise direction.

[0015] Preferably, a V-shaped groove is formed on the main conveyor belt, and the flipping unit is located in the V-shaped groove. The flipping unit includes a flipping mechanism and an auxiliary mechanism. The flipping mechanism includes a rotatable bottom roller, a fixed protective shell and a fixed horizontal blow pipe. The bottom roller abuts against the V-shaped groove, the protective shell is located on the outside of the bottom roller, and the horizontal blow pipe is located above the V-shaped groove.

[0016] Preferably, the flipping mechanism includes a rotatable transmission roller, two rotatable auxiliary rollers and an auxiliary belt. The two auxiliary rollers are connected by the auxiliary belt transmission. The transmission roller is located between the auxiliary belt and the V-shaped groove and abuts against both.

[0017] Preferably, a straight section, an outer arc section and an inner arc section are formed on the protective shell, the outer arc section is located between the straight section and the inner arc section, and the inner arc section is located outside the bottom roller.

[0018] Compared with the prior art, the present invention has the following beneficial effects: 1. During operation, through the coordinated use of the identification unit and the turning unit, the materials can be identified and separated by the identification unit during the material conveying process, and then the separated materials can be turned over by the turning unit, so that the conveyed materials can finally maintain a consistent front or back side to facilitate subsequent operations.

[0019] 2. During operation, through the side blowing pipe, when the front side of the sealing sheet contacts the main conveyor belt, the contact area between the two is large, so it does not deviate and thus remains stationary on the main conveyor belt. When the back side of the sealing sheet contacts the main conveyor belt, the contact area between the two is small, so it deviates and allows the sealing sheet to pass through the connecting port and enter the interior of the side channel. This allows the front and back sides of the material to be identified and separated only through the side blowing pipe.

[0020] 3. During operation, the side blowing tube and laser emitter are coordinated to identify the front and back sides of the material by utilizing the different pulses fed back from the front and back sides of the material. This is not only applicable to materials with a small deviation in the contact area between the front and back sides and the main conveyor belt, but is also applicable as long as the pulses fed back from the front and back sides of the material are different. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0022] In the attached figure: Figure 1 This is a structural schematic diagram of a feeding device for quickly identifying the front and back of a product according to the present invention; Figure 2 This is a schematic diagram of a first embodiment of the turning unit of the present invention; Figure 3 This is a schematic diagram of the installation structure of the suction hole area of ​​the present invention; Figure 4 This is a schematic diagram of the vacuum suction cup installation structure of the present invention; Figure 5 This is a schematic diagram of a second embodiment of the turning unit of the present invention; Figure 6 For the present invention Figure 5 A in the middle is an enlarged structural diagram; Figure 7 For the present invention Figure 6 The enlarged structural diagram at B in the middle; Figure 8 Schematic diagram of the sealing gasket structure of the present invention.

[0023] In the figure: 1. Main conveyor belt; 2. Partition frame; 3. Middle channel; 4. Side channel; 5. Connecting port; 6. Discharge channel; 7. Side outlet; 8. Side blow pipe; 9. Suction hole area; 10. Vacuum suction cup; 11. Sealing plate; 12. Center hole; 13. Inner groove; 14. Laser emitter; 15. Baffle; 16. Outer partition; 17. Inner partition; 18. Inclined slope; 19. V-shaped groove; 20. Bottom roller; 21. Protective shell; 22. Horizontal blow pipe; 23. Transmission roller; 24. Auxiliary roller; 25. Auxiliary belt; 26. Straight section; 27. Outer arc section; 28. Inner arc section. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0025] Depend on Figures 1-8 The present invention relates to a feeding device for quickly identifying the front and back of a product, comprising a main conveyor belt 1 and a fixed partition frame 2. A middle channel 3 and a side channel 4 are formed at the feed end of the main conveyor belt 1 through the partition frame 2. A connecting port 5 is formed between the middle channel 3 and the side channel 4. A discharge channel 6 is formed at the discharge end of the main conveyor belt 1. Both the middle channel 3 and the side channel 4 are connected to the discharge channel 6. A side discharge port 7 is formed on the discharge channel 6. An identification unit is provided on the outside of the connecting port 5, and a flip unit is provided on the outside of the main conveyor belt 1. The identification unit includes a fixed side blowing pipe 8, which is connected to an external air pump and is located outside the connecting port 5; when working, the airflow of the side blowing pipe 8 at the connecting port 5 is blown from the middle channel 3 to the side channel 4; an identification unit is also provided at the discharge channel 6, and the airflow of the side blowing pipe 8 at the discharge channel 6 is blown from the discharge channel 6 to the side discharge port 7.

[0026] With this design, when in use, the material is put into the middle channel 3 on the main conveyor belt 1 manually or by a loader, and the material is fed through the main conveyor belt 1. When the material is located in the area near the communication port 5 on the middle channel 3, the front and back sides of the material are identified by the recognition unit to distinguish whether the placement of the material is consistent. When the recognition unit identifies that the placement of the material is inconsistent, the side blowing pipe 8 can be operated, and the air flow blown out by the side blowing pipe 8 impacts the material, so that the inconsistent material on the middle channel 3 passes through the communication port 5 and moves to the inside of the side channel 4, and the material inside is turned over by the turning unit in the side channel 4; The turned material is combined with the material in the middle channel 3 and then tested again by the identification unit. After the test, the qualified material is discharged through the discharge channel 6, while the unqualified material is impacted by the air flow of the side blowing pipe 8 at the discharge channel 6, so that the unqualified material is discharged through the side discharge port 7.

[0027] It should be noted that the material of the present invention is a sealing sheet 11, which is made of a ceramic material. A center hole 12 is formed at the center of the sealing sheet 11. The front side of the sealing sheet 11 is flat, and the back side of the sealing sheet 11 forms an inner groove 13, which is coaxially connected to the center hole 12. In this way, because the front and back sides of the material conveyed by the main conveyor belt 1 have different contact areas with the main conveyor belt 1, the blowing force of the side blowing pipe 8 causes the material with a large contact area to remain stationary on the main conveyor belt 1, while the material with a small contact area is deflected.

[0028] Reference Figure 1 , in short, the first implementation of the identification unit: When the contact areas between the front and back sides of the material and the main conveyor belt 1 are different, resulting in a large difference in the force required to deflect it through the airflow, the identification unit can directly use the side blow pipe 8, which generates airflow at a constant flow rate. When the front side of the sealing piece 11 contacts the main conveyor belt 1, due to the large contact area between the two, no deviation occurs and the sealing piece 11 remains stationary on the main conveyor belt 1. When the back side of the sealing piece 11 contacts the main conveyor belt 1, due to the small contact area between the two, it deviates and causes the sealing piece 11 to pass through the connecting port 5 and enter the interior of the side channel 4. In this way, due to the characteristics of the material itself, the front and back sides of the material can be identified and separated only by the side blow pipe 8.

[0029] Reference Figure 3 and Figure 4 In order to further improve the stability of the sealing sheet 11, preferably, a suction hole area 9 is formed on the main conveyor belt 1, and two fixed vacuum suction cups 10 are provided on the inner side of the main conveyor belt 1, one vacuum suction cup 10 is located below the area near the connecting port 5 on the middle channel 3, and the other vacuum suction cup 10 is located below the area near the side discharge port 7 on the discharge channel 6. Both vacuum suction cups 10 are connected to an external vacuum pumping device.

[0030] With this design, during the feeding process, the vacuum suction cup 10 generates suction through the vacuum equipment, and when the suction holes in the suction hole area 9 on the main conveyor belt 1 are aligned with the vacuum suction cup 10, the suction force can be transmitted to the sealing sheet 11 through the vacuum suction cup 10 and the suction holes in the suction hole area 9, thereby improving the conveying stability of the sealing sheet 11. In this way, when the front side of the sealing sheet 11 contacts the main conveyor belt 1, due to the large contact area, some of the suction holes can be completely covered by the sealing sheet 11. At this time, the sealing sheet 11 can be adsorbed and fixed by the vacuum suction cup 10, and when the back side of the sealing sheet 11 contacts the main conveyor belt 1, due to the small contact area, the part of the sealing sheet 11 that contacts the main conveyor belt 1 cannot completely cover the suction holes, resulting in the vacuum suction cup 10 being unable to effectively adsorb and fix the sealing sheet 11. At this time, it can be offset by airflow.

[0031] It should be noted that in order to further improve the sealing performance between the main conveyor belt 1 and the vacuum suction cup 10, magnetic blocks can be evenly fixed and embedded on the inner side of the main conveyor belt 1, and the sealing performance between the two can be improved by magnetic adsorption between the magnetic blocks and the vacuum suction cup 10. This is just an example of improving the sealing performance, and other methods can also be used, such as setting a slide groove or slide rail on the vacuum suction cup 10, and fixing a corresponding annular slider on the inner side of the main conveyor belt 1.

[0032] Reference Figure 1 , considering that the contact area deviation between the front and back sides of some materials and the main conveyor belt 1 is small, the above method is not applicable at this time, so the second implementation method of the identification unit can be adopted: The identification unit further includes a fixed laser emitter 14 , which is located above the communication port 5 .

[0033] With such a design, when in use, when the material is transported through the middle channel 3 on the main conveyor belt 1, when the material passes through, the pulse fed back by the laser emitter 14 is transmitted to the built-in detector for judgment. Since the front and back sides of the material have different shapes, the feedback pulses are also different, so that the material with basically the same reflected pulses can continue to be transported, while the material with different reflected pulses triggers the operation of the side blowing pipe 8, so that the airflow discharged from the side blowing pipe 8 blows the material, causing the material to deviate to the inside of the side channel 4 through the connecting port 5.

[0034] It should be noted that the above method is not only applicable to materials with a small deviation in contact area between the front and back sides and the main conveyor belt 1, but is also applicable as long as the pulses fed back from the front and back sides of the material are different.

[0035] Likewise, the turning unit of the present invention also has various different implementations, which are detailed as follows.

[0036] Reference Figure 1 and Figure 2, the first embodiment of the turning unit: The partition frame 2 is inclined relative to the length direction of the main conveyor belt 1, and the turning unit includes a baffle 15, an outer partition 16 and an inner partition 17, which are all fixed and arranged in sequence from the outside to the inside of the main conveyor belt 1. The inner partition 17 is fixed to the partition frame 2, and an inclined slope 18 is formed at one end of the outer partition 16. The longitudinal dimension of the end of the inclined slope 18 close to the baffle 15 gradually increases to the longitudinal dimension of the end of the inclined slope 18 away from the baffle 15; from the perspective of the discharge end of the main conveyor belt 1, the ends of the outer partition 16 and the inner partition 17 away from the baffle 15 are twisted in a clockwise direction.

[0037] With such a design, when the material enters the internal transportation of the side channel 4, as the main conveyor belt 1 and the partition frame 2 are moved in an inclined manner, the sealing sheet 11 on the side channel 4 is gradually guided by the partition frame 2 and approaches the baffle 15. As the main conveyor belt 1 moves, one end of the sealing sheet 11 gradually enters the inclined slope 18 on the outer partition 16. Under the action of the inclined slope 18, one end of the sealing sheet 11 is continuously raised until the sealing sheet 11 is basically upright and located between the outer partition 16 and the inner partition 17. As the outer partition 16 and the inner partition 17 are twisted, the sealing sheet 11 gradually falls to the other side, thereby realizing the flipping operation of the sealing sheet 11. The structure is simple and relatively convenient.

[0038] It should be noted that the baffle 15, outer partition 16 and inner partition 17 are all fixed on the existing frame; the above-mentioned flipping unit can be set not only in the side channel 4, but also in the middle channel 3, and can realize the flipping operation of the sealing sheet 11.

[0039] Reference Figure 5-Figure 7 , the second embodiment of the turning unit: A V-shaped groove 19 is formed on the main conveyor belt 1. The flipping unit is located in the V-shaped groove 19. The flipping unit includes a flipping mechanism and an auxiliary mechanism. The flipping mechanism includes a rotatable bottom roller 20, a fixed protective shell 21, and a fixed horizontal blowpipe 22. The bottom roller 20 abuts the V-shaped groove 19. The protective shell 21 is located outside the bottom roller 20. The horizontal blowpipe 22 is located above the V-shaped groove 19. The flipping mechanism includes a rotatable transmission roller 23, two rotatable auxiliary rollers 24, and an auxiliary belt 25. The two auxiliary rollers 24 are connected by the auxiliary belt 25. The transmission roller 23 is located between the auxiliary belt 25 and the V-shaped groove 19 and abuts and cooperates with both.

[0040] With such a design, when in use, when the sealing sheet 11 is conveyed through the side channel 4, the sealing sheet 11 will tilt after entering the interior of the V-shaped groove 19. The tilted sealing sheet 11 is blocked by the protective shell 21 and remains in the tilted state, and the airflow discharged by the horizontal blowpipe 22 impacts the tilted sealing sheet 11, so that the sealing sheet 11 turns over after being impacted, thereby realizing the turning over operation of the sealing sheet 11, which is more convenient, and under the action of the transmission roller 23, the main conveyor belt 1 and the auxiliary belt 25 move synchronously, so that the conveying operation of the sealing sheet 11 can still be maintained in the middle channel 3.

[0041] It should be noted that when the sealing sheet 11 is placed horizontally on the main conveyor belt 1, the airflow of the horizontal blow pipe 22 cannot act on the sealing sheet 11. When the sealing sheet 11 enters the V-shaped groove 19 and is tilted, the airflow of the horizontal blow pipe 22 can act on the sealing sheet 11.

[0042] Specifically, a straight section 26 , an outer arc section 27 and an inner arc section 28 are formed on the protective shell 21 . The outer arc section 27 is located between the straight section 26 and the inner arc section 28 , and the inner arc section 28 is located outside the bottom roller 20 .

[0043] This design, through the straight section 26 and the outer arc section 27, can avoid excessive wear between the sealing sheet 11 and the main conveyor belt 1. At the same time, the outer arc section 27 can prevent the sealing sheet 11 from continuing to fall, and play a role of limiting. The outer arc section 27 can also reduce the difficulty of turning over the tilted sealing sheet 11. The setting of the inner arc section 28 can avoid contact between the sealing sheet 11 and the bottom roller 20, and play a protective role. At the same time, it can also reduce the contact area between the sealing sheet 11 and the sealing sheet 11, so as to reduce the difficulty of movement of the sealing sheet 11 after turning over.

[0044] It should be noted that when the flipping mechanism in the above-mentioned flipping unit is arranged in the side channel 4, the auxiliary mechanism is arranged in the middle channel 3; of course, the two can also be swapped according to actual needs to adapt to actual installation requirements.

[0045] In addition, a secondary conveyor belt is provided on the outside of the main conveyor belt 1 in the opposite direction of its transmission direction. With this design, the unqualified sealing sheets 11 discharged through the side outlet 7 can be transported to the inside of the loader at the feed end of the main conveyor belt 1 through the secondary conveyor belt, thereby realizing automatic recovery and continued loading.

[0046] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0047] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A feeding device for quickly identifying the front and back of a product, comprising a main conveyor belt (1) and a fixed partition frame (2), characterized in that: The main conveyor belt (1) has a middle channel (3) and a side channel (4) formed at the feeding end thereof by a partition frame (2), a connecting port (5) is formed between the middle channel (3) and the side channel (4), a discharging channel (6) is formed at the discharging end thereof, the middle channel (3) and the side channel (4) are both connected to the discharging channel (6), a side discharge port (7) is formed on the discharging channel (6), an identification unit is provided on the outside of the connecting port (5), and a turning unit is provided on the outside of the main conveyor belt (1); The identification unit comprises a fixed side blowing pipe (8), which is connected to an external air pump and is located outside the connecting port (5); when in operation, the airflow of the side blowing pipe (8) at the connecting port (5) is blown from the middle channel (3) to the side channel (4).

2. A feeding device for quickly identifying the front and back of a product according to claim 1, characterized in that: The discharge channel (6) is also provided with an identification unit, and the airflow of the side blowing pipe (8) at the discharge channel (6) is blown from the discharge channel (6) to the side discharge port (7).

3. A feeding device for quickly identifying the front and back of a product according to claim 2, characterized in that: The front and back sides of the material conveyed by the main conveyor belt (1) have different contact areas with the main conveyor belt (1). The blowing force of the side blowing pipe (8) causes the material with a large contact area to remain stationary on the main conveyor belt (1), while the material with a small contact area is deflected.

4. A feeding device for quickly identifying the front and back of a product according to claim 3, characterized in that: A suction hole area (9) is formed on the main conveyor belt (1), and two fixed vacuum suction cups (10) are provided on the inner side of the main conveyor belt (1), one vacuum suction cup (10) is located below the area near the connecting port (5) on the middle channel (3), and the other vacuum suction cup (10) is located below the area near the side discharge port (7) on the discharge channel (6), and both vacuum suction cups (10) are connected to an external vacuum pumping device.

5. The feeding device for quickly identifying the front and back of a product according to claim 3, characterized in that: The material is a sealing sheet (11), which is made of ceramic material. A center hole (12) is formed at the center of the sealing sheet (11). The front side of the sealing sheet (11) is a plane, and the back side of the sealing sheet (11) forms an inner groove (13). The inner groove (13) is coaxially connected to the center hole (12).

6. The feeding device for quickly identifying the front and back of a product according to claim 1, characterized in that: The identification unit further comprises a fixedly arranged laser emitter (14), which is located above the communication port (5).

7. The feeding device for quickly identifying the front and back of a product according to claim 1, characterized in that: The partition frame (2) is tilted relative to the length direction of the main conveyor belt (1), and the flip unit includes a baffle (15), an outer baffle (16) and an inner baffle (17) which are all fixed and arranged in sequence from the outside to the inside of the main conveyor belt (1). The inner baffle (17) is fixed to the partition frame (2), and an inclined slope (18) is formed at one end of the outer baffle (16). The longitudinal dimension of the end of the inclined slope (18) close to the baffle (15) gradually increases to the longitudinal dimension of the end of the inclined slope (18) away from the baffle (15); from the perspective of the discharge end of the main conveyor belt (1), the ends of the outer baffle (16) and the inner baffle (17) away from the baffle (15) are twisted in a clockwise direction.

8. The feeding device for quickly identifying the front and back of a product according to claim 1, characterized in that: A V-shaped groove (19) is formed on the main conveyor belt (1), and a turning unit is located in the V-shaped groove (19). The turning unit includes a turning mechanism and an auxiliary mechanism. The turning mechanism includes a rotatably arranged bottom roller (20), a fixedly arranged protective shell (21) and a fixedly arranged horizontal blowpipe (22). The bottom roller (20) abuts against the V-shaped groove (19), the protective shell (21) is located outside the bottom roller (20), and the horizontal blowpipe (22) is located above the V-shaped groove (19).

9. The feeding device for quickly identifying the front and back of a product according to claim 8, characterized in that: The turning mechanism comprises a rotatable transmission roller (23), two rotatable auxiliary rollers (24) and an auxiliary belt (25), wherein the two auxiliary rollers (24) are connected to each other by the auxiliary belt (25), and the transmission roller (23) is located between the auxiliary belt (25) and the V-shaped groove (19) and is in contact with both.

10. The feeding device for quickly identifying the front and back of a product according to claim 8, characterized in that: A straight section (26), an outer arc section (27) and an inner arc section (28) are formed on the protective shell (21); the outer arc section (27) is located between the straight section (26) and the inner arc section (28); and the inner arc section (28) is located outside the bottom roller (20).

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