Full-automatic nitrogen charging sealing machine

Abstract

The utility model discloses and provides a full-automatic nitrogen filling sealing machine which comprises a machine frame, a conveying belt and a machine head are arranged on the surface of the machine frame, a feeding port and a discharging port are formed in the side, close to the conveying belt, of the machine head, and a rotating disc mechanism is arranged in the middle of the machine head. A plurality of first positioning grooves are distributed in the rotary disc mechanism in a circumferential array mode, the machine head is provided with a nitrogen charging mechanism, a cover falling mechanism and a sealing mechanism, and the nitrogen charging mechanism, the cover falling mechanism and the sealing mechanism are distributed above the first positioning grooves in a circumferential array mode. A pushing feeding mechanism is arranged at the position, close to the feeding port, of the conveying belt, and a pushing discharging mechanism is arranged at the position, close to the discharging port, of the machine head. The nitrogen charging mechanism, the cover falling mechanism and the sealing mechanism are arranged in the machine head, the packaging cans are sequentially moved to different stations through the rotating disc mechanism to be subjected to nitrogen charging and sealing operation, the whole process is automatically controlled, and the production efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of capping equipment, and in particular to a fully automatic nitrogen filling and sealing machine. Background Art

[0002] Some canned foods need to be filled with nitrogen for preservation to increase the shelf life. The canned foods need to be sealed and nitrogen introduced before sealing. The current sealing machines do not have the function of nitrogen filling. They need to be filled with nitrogen in the nitrogen filling equipment first and then sealed by the sealing machine, which results in low processing efficiency. Utility Model Content

[0003] The present disclosure provides a fully automatic nitrogen filling and sealing machine to solve one of the technical problems recognized by the inventor.

[0004] The present disclosure provides a fully automatic nitrogen filling and sealing machine, comprising a frame, a conveyor belt and a machine head are arranged on the surface of the frame, a feed port and a discharge port are opened on a side of the machine head close to the conveyor belt, a turntable mechanism is arranged in the middle of the machine head, a plurality of first positioning grooves are distributed in a circular array on the turntable mechanism, the machine head is provided with a nitrogen filling mechanism, a cover dropping mechanism and a sealing mechanism, the nitrogen filling mechanism, the cover dropping mechanism and the sealing mechanism are distributed in a circular array above the first positioning grooves, a push feeding mechanism is arranged at a position of the conveyor belt close to the feed port, and a push discharging mechanism is arranged at a position of the machine head close to the discharge port.

[0005] Preferably, the turntable mechanism includes a turntable motor fixedly connected to the inside of the machine head, the output shaft of the turntable motor is transmission-connected to the turntable main shaft, the bottom end of the turntable main shaft is fixedly connected to the first turntable, the first turntable has a plurality of the first positioning grooves distributed in a circular array, and a step is arranged in the first positioning groove.

[0006] Preferably, a second turntable is fixedly connected to the bottom of the first turntable via a turntable shaft, and a second positioning groove is provided at a position of the second turntable corresponding to the first positioning groove.

[0007] Preferably, a first baffle ring and a second baffle ring are respectively arranged around the outer sides of the first turntable and the second turntable, and the first baffle ring and the second baffle ring are provided with notches at positions close to the feed port and the discharge port.

[0008] Preferably, the nitrogen charging mechanism includes a cylinder fixing plate and a gas meter fixedly connected to the machine head, a nitrogen charging cylinder is fixedly connected to the side of the cylinder fixing plate, an output shaft of the nitrogen charging cylinder is fixedly connected to the nitrogen charging plate, and the nitrogen charging plate is fixedly connected to the nitrogen charging assembly.

[0009] Preferably, there are two nitrogen charging assemblies, which are respectively fixedly connected to both sides of the nitrogen charging plate. The nitrogen charging assembly includes a nitrogen charging shaft fixedly connected to the nitrogen charging plate, one end of the nitrogen charging shaft is fixedly connected to a nitrogen charging joint, and the other end is fixedly connected to a diverter block, and a plurality of nitrogen charging tubes are fixedly connected to the bottom of the diverter block, and the positions of the two nitrogen charging assemblies correspond to the first positioning grooves respectively.

[0010] Preferably, the cover dropping mechanism comprises a lower cover plate, the lower cover plate is fixedly connected to the machine head through the lower cover shaft, the lower cover plate is provided with a lower cover opening in the middle part of the lower cover plate, and a plurality of cover placing columns are fixedly connected to the upper part of the lower cover plate around the lower cover opening, and pull rod movable grooves are provided at two sides of the bottom of the lower cover plate, and pull rods are movably connected in the pull rod movable grooves, and one end of the two pull rods are fixedly connected through connecting plates, and the surface of the lower cover plate is fixedly connected with a pull rod cylinder, and the output shaft of the pull rod cylinder is fixedly connected to the connecting plate, and baffle movable grooves are provided at two sides of the bottom of the lower cover plate, and the baffle movable grooves are through-connected, and baffles stacked on each other are movably connected in the baffle movable grooves, and an arc-shaped track hole is provided on the baffle, and the pull rod is fixedly connected with a pull shaft, and the pull shaft passes through the track hole, and one end of the baffle can pass through the baffle movable groove to extend into the lower cover opening, and a sealing barrel is provided on the outer cover of the cover placing column.

[0011] Preferably, the sealing mechanism includes a sealing assembly and a lifting assembly, the sealing assembly is arranged above the first turntable, the lifting assembly includes a lifting cylinder fixedly connected to the inside of the frame, the output shaft of the lifting cylinder is fixedly connected to a tray, the output shaft of the lifting cylinder passes through the machine head, the tray is arranged in the machine head, and the tray and the sealing assembly are in the same straight line.

[0012] Preferably, the push-feeding mechanism includes a cylinder bracket fixedly connected to the surface of the frame, the surface of the cylinder bracket is fixedly connected to a feed cylinder, the output shaft of the feed cylinder is fixedly connected to a feed plate, the surface of the feed cylinder is fixedly connected to a detection electric eye, and the side of the feed port is fixedly connected to a limit plate.

[0013] Preferably, the pushing and discharging mechanism comprises a discharging cylinder, the discharging cylinder is fixedly connected to the inner side of the machine head, and the output shaft of the discharging cylinder is fixedly connected to a discharging plate.

[0014] The beneficial effects of the present disclosure are mainly as follows: the present invention arranges a nitrogen filling mechanism, a cover dropping mechanism and a sealing mechanism in the machine head, and moves the packaging can to different stations in sequence through a turntable mechanism for nitrogen filling and sealing operations, so as to realize full-process automated control and improve production efficiency.

[0015] It should be understood that both the foregoing general description and the following specific embodiments are for the purpose of example and illustration and do not necessarily limit the present disclosure. The accompanying drawings, which are incorporated into and constitute a part of the specification, illustrate the subject matter of the present disclosure. At the same time, the specification and the drawings are used to explain the principles of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the nitrogen filling and sealing machine according to an embodiment of the present disclosure;

[0018] Figure 2 It is a schematic diagram of the internal structure of the nose of an embodiment of the present disclosure;

[0019] Figure 3 It is a schematic diagram of the structure of the first turntable according to an embodiment of the present disclosure;

[0020] Figure 4 This is a schematic diagram of the structure of the cover-dropping mechanism according to an embodiment of the present disclosure;

[0021] Figure 5 A bottom view of the cover-dropping mechanism of the embodiment of the present disclosure;

[0022] Icons: 1-frame; 2-machine head; 21-feeding port; 22-discharging port; 3-conveyor belt; 41-first turntable; 411-first positioning slot; 412-step; 42-turntable motor; 43-second turntable; 431-second positioning slot; 44-first baffle ring; 45-second baffle ring; 51-cylinder fixing plate; 52-nitrogen-filling cylinder; 53-nitrogen-filling plate; 54-nitrogen-filling shaft; 55-nitrogen-filling joint; 56-nitrogen-filling pipe; 57-gas meter; 61-lower cover plate; 611-lower cover opening; 612-pull rod movable groove; 613-blocking plate movable groove; 62-cover placing column; 63-sealing barrel; 64-pull rod; 641-pull shaft; 65-pull rod cylinder; 66-connecting plate; 67-blocking plate; 671-track hole; 71-sealing assembly; 72-lifting cylinder; 73-tray; 81-cylinder bracket; 82-feeding cylinder; 83-feeding plate; 84-detection electric eye; 85-limiting plate; 91-discharging cylinder; 92-discharging plate. DETAILED DESCRIPTION

[0023] The technical solution of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0024] Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present disclosure.

[0025] In the description of the present disclosure, 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 disclosure 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 a limitation of the present disclosure. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0027] Example

[0028] like Figure 1-5As shown, this embodiment provides a fully automatic nitrogen filling and sealing machine, including a frame 1, a conveyor belt 3 and a head 2 are arranged on the surface of the frame 1, the conveyor belt 3 is used to transport packaging cans, a feed port 21 and a discharge port 22 are provided on the side of the head 2 close to the conveyor belt 3, a push feeding mechanism is arranged at the position of the conveyor belt 3 close to the feed port 21, the packaging can is moved to the position of the feed port 21, and the packaging can is pushed into the head 2 by the push feeding mechanism, a turntable mechanism is arranged in the middle of the head 2, and a plurality of first positioning grooves 411 are distributed in a circular array on the turntable mechanism, The turntable mechanism is used to drive the packaging cans to shift to different workstations for processing. The machine head 2 is provided with a nitrogen filling mechanism, a cover dropping mechanism and a sealing mechanism. The nitrogen filling mechanism, the cover dropping mechanism and the sealing mechanism are distributed in a circular array above the first positioning groove 411. The packaging cans move with the turntable mechanism, are first filled with nitrogen, then the covers are dropped on the packaging cans, and finally are sealed by the sealing mechanism. The machine head 2 is provided with a pushing and discharging mechanism near the discharge port 22, and finally the sealed packaging cans are pushed out of the discharge port 22 by the pushing and discharging mechanism and enter the conveyor belt 3 for transportation.

[0029] Specifically, the turntable mechanism includes a turntable motor 42 boltedly fixedly connected to the inside of the machine head 2, the output shaft of the turntable motor 42 is drivingly connected to the turntable main shaft, the bottom end of the turntable main shaft is boltedly fixedly connected to the first turntable 41, the first turntable 41 has a plurality of first positioning grooves 411 distributed in a circular array, the first positioning grooves 411 are used to realize the positioning of the packaging can, and drive the packaging can to move when the first turntable 41 rotates, the first positioning groove 411 is provided with a step 412, the step 412 is used to catch the lid dropped by the lid dropping mechanism, so that the lid moves synchronously with the packaging can to the sealing mechanism for sealing operation.

[0030] Furthermore, the bottom of the first turntable 41 is fixedly connected to a second turntable 43 via a turntable shaft, and a second positioning groove 431 is provided at a position of the second turntable 43 corresponding to the first positioning groove 411. For some packaging cans with higher heights, the two layers of turntables are used to move them, thereby preventing the packaging cans from deviating and improving the positioning effect.

[0031] Furthermore, the first retaining ring 44 and the second retaining ring 45 are respectively arranged around the outer sides of the first rotating disk 41 and the second rotating disk 43, and the first retaining ring 44 and the second retaining ring 45 are provided with notches near the feeding port 21 and the discharging port 22. The first retaining ring 44 and the second retaining ring 45 are arranged on the outer sides of the first rotating disk 41 and the second rotating disk 43, and when the packaging can moves in the positioning groove, the first retaining ring 44 and the second retaining ring 45 limit the packaging can to prevent the packaging can from being separated from the first positioning groove 411 and the second positioning groove 431, and the first retaining ring 44 and the second retaining ring 45 are provided with notches near the feeding port 21 and the discharging port 22, so as not to affect the feeding and exiting of the packaging can.

[0032] Specifically, the nitrogen charging mechanism includes a cylinder fixing plate 51 and a gas meter 57 fixedly connected to the machine head 2 by bolts, a nitrogen charging cylinder 52 is fixedly connected to the side of the cylinder fixing plate 51, an output shaft of the nitrogen charging cylinder 52 is fixedly connected to a nitrogen charging plate 53, and the nitrogen charging plate 53 is fixedly connected to a nitrogen charging assembly. Before filling nitrogen into the packaging can, it is necessary to ensure that the nitrogen concentration inside the machine head 2 is higher than 80%. Nitrogen is first filled into the machine head 2 through the nitrogen charging assembly, and the nitrogen concentration is detected by the gas meter 57. When it is higher than 80%, work starts.

[0033] Furthermore, there are two nitrogen charging components, which are respectively fixedly connected to the two sides of the nitrogen charging plate 53. The nitrogen charging component includes a nitrogen charging shaft 54 ​​fixedly connected to the nitrogen charging plate 53. One end of the nitrogen charging shaft 54 ​​is fixedly connected to a nitrogen charging joint 55, and the other end is fixedly connected to a diverter block. A plurality of nitrogen charging tubes 56 are fixedly connected to the bottom of the diverter block. The positions of the two nitrogen charging components correspond to the first positioning groove 411 respectively.

[0034] In this embodiment, the two nitrogen filling components correspond to the position of a first positioning groove 411 respectively, that is, the two nitrogen filling components correspond to two workstations, and the nitrogen filling operation is completed by filling the interior of the packaging can with nitrogen in small amounts twice. If a large amount of nitrogen is filled at a time, the nitrogen will scatter or splash the product in the packaging can, affecting the product quality. During nitrogen filling, the packaging tank moves with the turntable mechanism. When it moves to the bottom of the first nitrogen filling component, the nitrogen filling cylinder 52 drives the nitrogen filling plate 53 to move downward, driving the nitrogen filling tube 56 to be inserted into the packaging tank. The nitrogen filling shaft 54 ​​is connected to the nitrogen device through the nitrogen filling joint 55. The nitrogen delivered by the nitrogen device enters the diverter block through the nitrogen filling shaft 54, and is discharged from multiple nitrogen filling tubes 56 into the packaging tank. After the first nitrogen filling is completed, the nitrogen filling cylinder 52 drives the nitrogen filling tube 56 to move upward and leave the packaging tank. Then the packaging tank continues to move one station with the turntable. At this time, the above operation is repeated to perform the second nitrogen filling operation on the packaging tank. At this time, the next packaging tank enters the first nitrogen filling station to perform the first nitrogen filling operation. Two packaging tanks can be filled with nitrogen at the same time without affecting the processing efficiency.

[0035] Specifically, the cover-dropping mechanism includes a lower cover plate 61, which is fixedly connected to the machine head 2 through a lower cover shaft, a lower cover opening 611 is provided in the middle of the lower cover plate 61, and a plurality of cover-dropping columns 62 are fixedly connected around the lower cover opening 611 on the upper part of the lower cover plate 61, and pull rod movable grooves 612 are provided on both sides of the bottom of the lower cover plate 61, and pull rods 64 are movably connected in the pull rod movable grooves 612, and one end of the two pull rods 64 is fixedly connected by a connecting plate 66, and a pull rod cylinder 65 is fixedly connected to the surface of the lower cover plate 61, and the output shaft of the pull rod cylinder 65 is connected to the The connecting plate 66 is fixedly connected, and both sides of the bottom of the lower cover plate 61 are provided with movable baffle grooves 613, and the movable baffle grooves 613 are through-connected with the movable pull rod grooves 612. The movable baffle grooves 613 are movably connected with mutually stacked baffles 67, and the baffle 67 is provided with an arc-shaped track hole 671. The pull rod 64 is fixedly connected with a pull shaft 641, and the pull shaft 641 is arranged through the track hole 671. One end of the baffle 67 can pass through the movable baffle groove 613 and extend to the lower cover opening 611. The outer side cover of the cover column 62 is provided with a sealing barrel 63.

[0036] In this embodiment, the lid is first stacked in the middle of the lid placing column 62, and then sealed by the sealing barrel 63 to prevent internal nitrogen leakage. Then, when the packaging can filled with nitrogen moves to the working position of the lid dropping mechanism, an electric eye is set on the inner side of the head 2 near the lid dropping mechanism to detect whether the packaging can is in place. After detecting that the packaging can is in place, the connecting plate 66 is pulled by the pull rod cylinder 65 to move, driving the two pull rods 64 to move back and forth in the pull rod movable groove 612. During the movement of the pull rod 64 back and forth, the pull shaft 641 moves in the track hole 671 of the baffle 67. The track holes 671 on the upper and lower stacked baffles 67 are symmetrically arranged, and the track hole 671 is an arc structure similar to the "C" shape. When the pull shaft 641 moves in the track holes 671 of the two baffles 67, it drives the baffle 67 to move back and forth in the baffle movable groove 613 , the two baffles 67 move to opposite trajectories, thereby forming an effect that one baffle 67 extends into the lower cover opening 611 and the other baffle 67 leaves the lower cover opening 611. In the initial state, one baffle 67 extends into the lower cover opening 611 to block the lid from falling. When the two baffles 67 move at the same time, the lower baffle 67 leaves the lower cover opening 611, and the lid at the bottom will fall onto the step 412 of the first positioning groove 411 to wait for the sealing operation. The upper baffle 67 is inserted between the lower lid and the second lid at the same time to block the other lids from falling, so that only one lid falls each time. Then the pull rod cylinder 65 moves in the direction, the baffle 67 at the bottom is inserted into the lower cover opening 611, and the baffle 67 at the top retracts and leaves the lower cover opening 611. At this time, the stacked lids fall back on the lower baffle 67 to wait for the next lid lowering operation. After the lid lowering is completed, one lid follows the first turntable 41 and the packaging can to move synchronously to the sealing mechanism for sealing operation.

[0037] Specifically, the sealing mechanism includes a sealing assembly 71 and a lifting assembly. The sealing assembly is a device in the prior art that can seal a packaging can. It can be set by selecting the type and size of the required packaging cover. Its specific structure and working principle will not be described in detail here. The lifting assembly includes a lifting cylinder 72 fixedly connected to the inside of the frame 1. The output shaft of the lifting cylinder 72 is fixedly connected to a tray 73. The output shaft of the lifting cylinder 72 passes through the head 2. The tray 73 is set in the head 2. The tray 73 is in the same straight line as the sealing assembly 71. In this embodiment, the lifting cylinder 72 drives the tray 73 to move upward, driving the packaging can to move upward. The packaging can moves upward to push the lid in the first positioning groove 411 to move upward to the position of the sealing assembly 71 for sealing operation, and the packaging can is supported by the tray 73 to prevent it from moving during sealing, so as to ensure the sealing effect. After the sealing is completed, the lifting cylinder 72 drives the tray 73 to move downward, so that the sealed packaging can returns to its original position.

[0038] Specifically, the push-feeding mechanism includes a cylinder bracket 81 fixedly connected to the surface of the frame 1, the surface of the cylinder bracket 81 is fixedly connected to a feed cylinder 82, the output shaft of the feed cylinder 82 is fixedly connected to a feed plate 83, the surface of the feed cylinder 82 is fixedly connected to a detection electric eye 84, and the side of the feed port 21 is fixedly connected to a limit plate 85.

[0039] Specifically, the push feeding mechanism includes a cylinder bracket 81 bolted and fixedly connected to the surface of the frame 1, a feeding cylinder 82 bolted and fixedly connected to the surface of the cylinder bracket 81, a feeding plate 83 bolted and fixedly connected to the output shaft of the feeding cylinder 82, a detection electric eye 84 bolted and fixedly connected to the surface of the feeding cylinder 82, and a limit plate 85 bolted and fixedly connected to the side of the feeding port 21. The packaging can is transported by the conveyor belt 3, and when it moves to the side of the feeding port 21, it is blocked by the limit plate 85 and stops moving forward. At this time, the detection electric eye 84 detects that the packaging can is in place, and the feeding cylinder 82 drives the feeding plate 83 to move toward the feeding port 21, thereby pushing the packaging can into the machine head 2, so that the packaging can is embedded in the first positioning groove 411 and the second positioning groove 431, and the loading is completed.

[0040] Specifically, the pushing and discharging mechanism includes a discharging cylinder 91, which is fixedly connected to the inner side of the machine head 2, and the output shaft of the discharging cylinder 91 is fixedly connected to a discharging plate 92. After the packaging can is sealed, it moves to the discharging mechanism through the turntable mechanism, and the discharging cylinder 91 drives the discharging plate 92 to move toward the discharging port 22, so that the packaging can is pushed onto the conveyor belt 3, and the packaging can continues to move along the conveyor belt 3 for subsequent processing.

[0041] The working principle of the utility model is as follows: before processing, nitrogen is first filled into the machine head 2 through the nitrogen filling mechanism. When the gas meter 57 detects that the nitrogen concentration exceeds 80%, the nitrogen filling and sealing operations are started. First, the packaging can is transported by the conveyor belt 3. When it moves to the side of the feed port 21, it is blocked by the limit plate 85 and stops moving forward. At this time, the detection electric eye 84 detects that the packaging can is in place, and the feed cylinder 82 drives the feed plate 83 to move in the direction of the feed port 21, thereby pushing the packaging can into the machine head 2, so that the packaging can is embedded in the first positioning groove 411 and the second positioning groove 431, and then the packaging can is driven by the turntable mechanism to move to the bottom of the nitrogen filling mechanism. After two nitrogen filling operations, the nitrogen filling is completed and the packaging can continues to move to the cover drop mechanism. The cover drop mechanism drops a cover, and the cover and the packaging can are synchronously moved to the sealing mechanism. After the sealing is completed by the sealing mechanism, the discharge cylinder 91 drives the discharge plate 92 to move in the direction of the discharge port 22, thereby pushing the packaging can onto the conveyor belt 3, and the packaging can continues to move along the conveyor belt 3 for subsequent processing.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A fully automatic nitrogen filling and sealing machine, characterized in that: include: A frame, wherein a conveyor belt and a machine head are arranged on the surface of the frame, a feed port and a discharge port are opened on a side of the machine head close to the conveyor belt, a turntable mechanism is arranged in the middle of the machine head, and a plurality of first positioning grooves are distributed in a circular array on the turntable mechanism, the machine head is provided with a nitrogen filling mechanism, a cover dropping mechanism and a sealing mechanism, and the nitrogen filling mechanism, the cover dropping mechanism and the sealing mechanism are distributed in a circular array above the first positioning groove, a push feeding mechanism is arranged at a position of the conveyor belt close to the feed port, and a push discharging mechanism is arranged at a position of the machine head close to the discharge port.

2. A fully automatic nitrogen filling and sealing machine according to claim 1, characterized in that: The turntable mechanism includes a turntable motor fixedly connected to the inside of the machine head, the output shaft of the turntable motor is transmission-connected to the turntable main shaft, the bottom end of the turntable main shaft is fixedly connected to the first turntable, the first turntable has a plurality of the first positioning grooves distributed in a circular array, and a step is arranged in the first positioning groove.

3. A fully automatic nitrogen filling and sealing machine according to claim 2, characterized in that: The bottom of the first turntable is fixedly connected to a second turntable via a turntable shaft, and a second positioning groove is provided at a position of the second turntable corresponding to the first positioning groove.

4. The fully automatic nitrogen filling and sealing machine according to claim 3, characterized in that: The first and second rotating disks are respectively surrounded by a first retaining ring and a second retaining ring. The first and second retaining rings are provided with notches near the feed port and the discharge port.

5. The fully automatic nitrogen filling and sealing machine according to claim 1, characterized in that: The nitrogen charging mechanism comprises a cylinder fixing plate and a gas meter fixedly connected to the machine head, a nitrogen charging cylinder is fixedly connected to the side of the cylinder fixing plate, an output shaft of the nitrogen charging cylinder is fixedly connected to the nitrogen charging plate, and the nitrogen charging plate is fixedly connected to the nitrogen charging assembly.

6. The fully automatic nitrogen filling and sealing machine according to claim 5, characterized in that: There are two nitrogen charging assemblies, which are respectively fixedly connected to both sides of the nitrogen charging plate. The nitrogen charging assembly includes a nitrogen charging shaft fixedly connected to the nitrogen charging plate, one end of the nitrogen charging shaft is fixedly connected to a nitrogen charging joint, and the other end is fixedly connected to a shunt block, and a plurality of nitrogen charging tubes are fixedly connected to the bottom of the shunt block, and the positions of the two nitrogen charging assemblies correspond to the first positioning grooves respectively.

7. The fully automatic nitrogen filling and sealing machine according to claim 1, characterized in that: The cover drop mechanism comprises a lower cover plate, which is fixedly connected to the machine head through the lower cover shaft, and a lower cover opening is opened in the middle of the lower cover plate, and a plurality of cover release columns are fixedly connected to the upper part of the lower cover plate around the lower cover opening, and a pull rod movable groove is opened on both sides of the bottom of the lower cover plate, and a pull rod is movably connected in the pull rod movable groove, and one end of the two pull rods is fixedly connected through a connecting plate. The surface of the lower cover plate is fixedly connected to a pull rod cylinder, and the output shaft of the pull rod cylinder is fixedly connected to the connecting plate. A baffle movable groove is opened on both sides of the bottom of the lower cover plate, and the baffle movable groove is through-connected with the pull rod movable groove, and baffles stacked on each other are movably connected in the baffle movable groove, and an arc-shaped track hole is opened on the baffle, and the pull rod is fixedly connected with a pull shaft, and the pull shaft passes through the track hole, and one end of the baffle can pass through the baffle movable groove and extend into the lower cover opening, and a sealing barrel is provided on the outer cover of the cover release column.

8. The fully automatic nitrogen filling and sealing machine according to claim 1, characterized in that: The sealing mechanism includes a sealing assembly and a lifting component. The sealing assembly is arranged above the first turntable. The lifting component includes a lifting cylinder fixedly connected to the inside of the frame. The output shaft of the lifting cylinder is fixedly connected to a tray. The output shaft of the lifting cylinder passes through the machine head. The tray is arranged in the machine head. The tray and the sealing assembly are in the same straight line.

9. The fully automatic nitrogen filling and sealing machine according to claim 1, characterized in that: The push feeding mechanism includes a cylinder bracket fixedly connected to the surface of the frame, the surface of the cylinder bracket is fixedly connected to a feeding cylinder, the output shaft of the feeding cylinder is fixedly connected to a feeding plate, the surface of the feeding cylinder is fixedly connected to a detection electric eye, and the side of the feeding port is fixedly connected to a limiting plate.

10. The fully automatic nitrogen filling and sealing machine according to claim 1, characterized in that: The pushing and discharging mechanism comprises a discharging cylinder, the discharging cylinder is fixedly connected to the inner side of the machine head, and the output shaft of the discharging cylinder is fixedly connected to a discharging plate.

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