An automatic grading and packaging device for pickled eggs and a method of using the same

Abstract

The application discloses a kind of automatic grading packaging device of marinated egg and its using method, comprising: automatic feeding device, several screening conveyor belts and the vacuum packaging device being arranged below screening conveyor belt;Automatic feeding device includes: tray and the spiral chute being arranged in the side wall of tray;The lower part of tray is provided with pulse electromagnet;The upper end of spiral chute is provided with feeding port, and pulse electromagnet is used to drive tray to vibrate vertically up and down;Screening conveyor belt is fixedly connected with the outer wall of automatic feeding device, and screening conveyor belt includes: shell, annular transmission member movably arranged in shell.The application provides an automatic grading packaging device of marinated egg, which is automatically graded in size when packaging marinated egg by the cooperation of automatic feeding device, several screening conveyor belts and vacuum packaging device, and adjusts the posture of marinated egg during transportation to packaging, to facilitate the vacuum packaging.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of marinated egg packaging equipment, in particular to a marinated egg automatic grading and packaging device and a use method thereof. BACKGROUND

[0002] Marinated eggs, also known as marinated water eggs, are cooked eggs processed with various seasonings or meat juices. At present, with the continuous development of the food industry, more and more bagged cooked food products appear in people's lives, including marinated egg bagged food. Marinated eggs are basically individually vacuum packaged.

[0003] However, the marinated eggs produced in the same batch are not completely the same in size, so size grading is needed when vacuum packaging marinated eggs to avoid the vacuum packaging film being insufficient to completely wrap the marinated eggs due to the large size difference of the marinated eggs, affecting the packaging effect. In addition, during vacuum packaging, the marinated eggs that roll freely have different shapes, which can affect the appearance of the packaging during vacuuming, and even cause the packaging film to be damaged.

[0004] Therefore, it is necessary to provide a marinated egg automatic grading and packaging device and a use method thereof to solve the above technical problems. SUMMARY

[0005] The present application overcomes the shortcomings of the prior art and provides a marinated egg automatic grading and packaging device and a use method thereof.

[0006] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows: a marinated egg automatic grading and packaging device, comprising: an automatic feeding device, a plurality of screening conveyor belts, and a vacuum packaging device arranged below the screening conveyor belts;

[0007] The automatic feeding device comprises a tray and a spiral chute arranged on the side wall of the tray; the lower part of the tray is provided with a pulse electromagnet; the upper end of the spiral chute is provided with a feeding port, and the pulse electromagnet is used to drive the tray to vibrate vertically up and down;

[0008] The screening conveyor belt is fixedly connected with the outer wall of the automatic feeding device, and the screening conveyor belt comprises a housing, an annular transmission member movably arranged in the housing, and a plurality of egg holder assemblies arranged on one side of the annular transmission member; the upper and lower surfaces of the housing corresponding to the position of the feeding port are both open, the lower surface of the housing is provided with an outlet portion, and the vacuum packaging device is arranged below the outlet portion;

[0009] A plurality of the egg tray assemblies are equidistantly distributed along the annular transmission member, and each of the egg tray assemblies comprises a connecting plate, a first tray plate and a second tray plate arranged between the connecting plate, the connecting plate is fixedly connected with the surface of the annular transmission member, the first tray plate and the second tray plate are symmetrical and have the same shape, and the surfaces of the first tray plate and the second tray plate are provided with a bearing part and a passing part, and the passing part is arranged at the middle position of the bearing part.

[0010] In a preferred embodiment of the present application, the screening conveyor belts are arranged around the automatic feeding device, and a plurality of the screening conveyor belts are linearly arranged in the vertical direction, the outlet portions on each of the screening conveyor belts are arranged in a staggered manner, and correspond to different vacuum packaging devices.

[0011] In a preferred embodiment of the present application, the bearing part is designed as a groove, and the outer edges of the symmetrical bearing parts are combined into an oval or an ovate shape.

[0012] In a preferred embodiment of the present application, the passing part is designed as a through hole, and the outer edges of the symmetrical passing parts are combined into a circular shape.

[0013] In a preferred embodiment of the present application, the width of the passing part in the same layer is smaller than the width of the bearing part at the central position, and the width of the bearing part at the central position in the lower layer is smaller than the width of the passing part in the upper layer.

[0014] In a preferred embodiment of the present application, the two ends of the first tray plate are fixedly connected with the surface of the connecting plate, the surface of the connecting plate is provided with a movable slot along the length direction of the connecting plate, and the two ends of the second tray plate are respectively inserted into the inside of the movable slot.

[0015] In a preferred embodiment of the present application, the surface of the first tray plate and the surface of the second tray plate are respectively provided with a first connecting rod and a second connecting rod, the first connecting rod and the second connecting rod are hinged, the length of the second connecting rod is greater than the length of the first connecting rod, the lower end of the second connecting rod is provided with a spring, and the upper end of the spring is fixedly connected with the side surface of the first connecting rod.

[0016] A discharging rod is arranged on the side wall of the outlet portion, the discharging rod is arranged in parallel with the second tray plate and on one side of the second connecting rod, and is used for abutting against the second connecting rod.

[0017] In a preferred embodiment of the present application, the vacuum packaging device is arranged below the outlet portion, and the vacuum packaging device comprises a lower film heating assembly, a forming die, a filling area, an upper film area, a vacuum sealing assembly and a slitting assembly which are sequentially arranged.

[0018] The lower film heating assembly comprises a heater, and is used for heating the passing stretching film.

[0019] The forming die comprises a stretching piece and a die plate, a plurality of grooves are formed on the surface of the die plate corresponding to the halogen egg shape, and the stretching piece is used for stretching the heated stretching film to be attached to the grooves;

[0020] The filling area is located directly below the outlet part, and the halogen eggs are automatically dropped into the grooves;

[0021] The upper film area is used for film coating from the upper part of the halogen eggs;

[0022] The vacuum sealing assembly is used for vacuum sealing of the package;

[0023] The slitting assembly comprises a plurality of transverse and longitudinal cutters for slitting the whole package into single products.

[0024] The application also provides a use method of the halogen egg automatic grading and packaging device, comprising the following steps:

[0025] S1, the halogen eggs are poured into the automatic feeding device, under the directional vibration force, the halogen eggs are uniformly scattered and rise forward along the spiral chute, and then fall downward from the discharge port to the upper sieve conveying belt;

[0026] S2, the halogen eggs continuously adjust the posture on the egg holder assembly in the sieve conveying belt until the halogen eggs are placed flat on the carrying part and transported forward, wherein part of the halogen eggs vertically pass through the passing part and enter the lower sieve conveying belt;

[0027] S3, the halogen eggs continuously adjust the posture on the egg holder assembly in the lower sieve conveying belt until the halogen eggs are placed flat on the carrying part and transported forward;

[0028] S4, when the halogen eggs are transported to the outlet part, the egg holder assembly is pulled apart, the halogen eggs fall from the egg holder assembly and enter the vacuum packaging device from the outlet part for packaging operation.

[0029] In the S2 and S3 of the preferred embodiment of the application, the vibration force from the automatic feeding device is used to vibrate the halogen eggs on the egg holder assembly to adjust the posture of the halogen eggs.

[0030] The application solves the defects in the background art and has the following beneficial effects:

[0031] The application provides a halogen egg automatic grading and packaging device and a use method thereof, by cooperation of the automatic feeding device, the plurality of sieve conveying belts and the vacuum packaging device, the size of the halogen eggs can be automatically graded when the halogen eggs are packaged, and the posture of the halogen eggs is adjusted during transportation to the packaging to facilitate the vacuum packaging.

[0032] The application uses the egg supporting assembly on the screening conveyor belt, the surfaces of the first supporting plate and the second supporting plate are provided with the bearing part and the passing part, wherein the bearing part is designed as a groove, the outer edge line is combined as an oval or an oval shape, and is used for laying the salted eggs, the additional passing part is designed as a through type, the outer edge line is combined as a circle, and the width of the passing part is less than the width of the center position of the bearing part, the smaller salted eggs can vertically fall from the passing part and enter the lower screening conveyor belt, and the function of the automatic grading of the salted eggs is realized, and the packaging efficiency is improved.

[0033] The application is provided by the cooperation of the automatic feeding device and the screening conveyor belt, the pulse electromagnet at the bottom of the material tray generates the on-off electricity under the action of the current, the material tray vertically vibrates, and then the vibration force is provided to the screening conveyor belt, the salted eggs on the egg supporting assembly are vibrated, and the posture on the egg supporting assembly is continuously changed, the smaller salted eggs become the vertical posture and enter the lower layer from the passing part, and the salted eggs with the appropriate size become the laying posture and adhere to the bearing part, so that the next step of the vacuum packaging is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor;

[0035] Figure 1 is a top view structure diagram of the preferred embodiment of the present application;

[0036] Figure 2 is a front view structure diagram of the preferred embodiment of the present application;

[0037] Figure 3 is a three-dimensional structure diagram of the egg supporting assembly of the preferred embodiment of the present application;

[0038] Figure 4 is a first connecting rod and second connecting rod connection structure diagram of the preferred embodiment of the present application;

[0039] Figure 5 is a three-dimensional structure diagram of the discharging rod of the preferred embodiment of the present application;

[0040] Figure 6 is a method flow chart of the preferred embodiment of the present application.

[0041] In the figure: 1, screening conveyor belt; 2, vacuum packaging device; 3, tray; 4, spiral chute; 5, feeding port; 6, shell; 7, egg holder assembly; 8, connecting plate; 9, first supporting plate; 10, second supporting plate; 11, bearing part; 12, passing part; 13, movable groove; 14, first connecting rod; 15, second connecting rod; 16, spring; 17, discharging rod. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0043] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a variety of ways beyond the specific details set forth herein, and the scope of the present application is not limited to the specific embodiments described below.

[0044] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the scope of protection of the present application. In addition, the terms "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" and the like can explicitly or implicitly include one or more features. In the description of the present application, unless otherwise specified and limited, the term "a plurality of" means two or more.

[0045] In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between the two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood through specific circumstances.

[0046] As Figure 1As shown, the present application provides a kind of automatic grading and packing device of salted egg and its using method, comprising: automatic feeding device, several screening conveyor belts 1 and the vacuum packaging device 2 being arranged below screening conveyor belt 1;Automatic feeding device includes: tray 3 and spiral chute 4 being arranged in the side wall of tray 3;The lower part of tray 3 is provided with pulse electromagnet;The upper end of spiral chute 4 is provided with feeding port 5, and pulse electromagnet is used to drive tray to vibrate vertically up and down.

[0047] Tray 3 is a certain depth of cylindrical, and tray 3 is connected between its base through inclined spring 16 piece, and tray 3 is vertically vibrated up and down under the action of current by the pulse electromagnet under it, so as to make tray 3, vibration amplitude 1-5mm, vibration frequency is within 50-120Hz, because the inclined setting of spring 16 piece, makes tray 3 do torsional vibration around its vertical axis, and the salted egg in tray 3 is constantly raised forward along spiral chute 4 due to this vibration, and the salted egg is constantly adjusted in the process and evenly scattered.

[0048] As shown in Figure 1 And Figure 2 Screening conveyor belt 1 is fixedly connected with the outer wall of automatic feeding device, and screening conveyor belt 1 comprises: shell 6, annular transmission member movably arranged in shell 6, and several egg holder assemblies 7 arranged on one side of annular transmission member;The upper and lower surfaces of shell 6 corresponding to the position of feeding port 5 are both opened, the lower surface of shell 6 is provided with an outlet portion, and the vacuum packaging device 2 is arranged below the outlet portion;Screening conveyor belt 1 is arranged around the automatic feeding device, and several screening conveyor belts 1 are linearly arrayed in the vertical direction.

[0049] The number of screening conveyor belts 1 in the present application is preferably two, which is provided with a driving assembly, the driving assembly comprises a servo motor, the output end of the servo motor is fixedly connected with a driving roller, the surface of the driving roller has teeth, the side of the annular transmission member close to the driving roller is also provided with teeth, the driving roller is engaged with the surface of the annular transmission member, and the rotation of the driving roller drives the annular transmission member to move along the annular route, thereby driving the several egg holder assemblies 7 on the other side.

[0050] Two screening conveyor belts 1 are stacked, and the upper and lower surfaces of shell 6 corresponding to the position of feeding port 5 are both opened, the upper opening is used to receive the salted egg discharged from feeding port 5 into screening conveyor belt 1, and the lower opening is used to ensure stable conveying of salted egg by annular screening conveyor belt 1, while not affecting the salted egg falling from the upper screening conveyor belt 1 to the lower screening conveyor belt 1, which realizes automatic grading of salted egg size in cooperation with the special design of egg holder assembly 7.

[0051] As shown in Figure 3As shown, several egg tray assemblies 7 are distributed equidistantly along the annular transmission member, and the egg tray assembly 7 comprises a connecting plate 8, a first tray plate 9 and a second tray plate 10 arranged between the connecting plate 8, the connecting plate 8 is fixedly connected with the surface of the annular transmission member, the first tray plate 9 and the second tray plate 10 are symmetrical and have the same shape, the surface of the first tray plate 9 and the second tray plate 10 is provided with a bearing part 11 and a passing part 12, the passing part 12 is arranged at the middle position of the bearing part 11, the bearing part 11 is designed as a groove, and the outer edge lines of the symmetrical bearing parts 11 are combined as an oval or an ovoid, the passing part 12 is designed as a through hole, and the outer edge lines of the symmetrical passing parts 12 are combined as a circle, the width of the passing part 12 is smaller than the width of the central position of the bearing part 11, and the width of the central position of the lower bearing part 11 is smaller than the width of the upper passing part 12.

[0052] The surface of the first tray plate 9 and the second tray plate 10 is provided with the bearing part 11 and the passing part 12, the bearing part 11 is designed as a groove, and the outer edge lines are combined as an oval or an ovoid, which is used to lay the salted eggs, the passing part 12 is designed as a through hole, and the outer edge lines are combined as a circle, and the width of the passing part 12 is smaller than the width of the central position of the bearing part 11, the smaller salted eggs can vertically fall from the passing part 12 and enter the lower sieve conveyor 1, thereby realizing the function of automatic grading of the salted eggs and improving the packaging efficiency.

[0053] The pulse electromagnet at the bottom of the tray 3 generates on-off electricity under the action of current, so that the tray vertically vibrates, thereby providing vibration force for the sieve conveyor 1, the salted eggs on the egg tray assembly 7 are vibrated and constantly change the posture on the egg tray assembly 7, first, the smaller salted eggs become a vertical posture and enter the lower layer through the passing part 12, second, the salted eggs with appropriate size become a laying posture and are attached to the bearing part 11, thereby facilitating the next step of vacuum packaging.

[0054] As shown in Figures 3 to 5 The two ends of the first tray plate 9 are fixedly connected with the surface of the connecting plate 8, the surface of the connecting plate 8 is provided with a movable slot 13 along the length direction of the connecting plate 8, and the two ends of the second tray plate 10 are respectively inserted into the inside of the movable slot 13, the surface of the first tray plate 9 and the second tray plate 10 is respectively provided with a first connecting rod 14 and a second connecting rod 15, the first connecting rod 14 and the second connecting rod 15 are hinged, the length of the second connecting rod 15 is greater than the length of the first connecting rod 14, one side of the second connecting rod 15 is provided with a spring 16, and the upper end of the spring 16 is fixedly connected with the side surface of the first connecting rod 14, the side wall of the shell 6 is provided with a discharging rod 17, the discharging rod 17 is arranged above the outlet part, the discharging rod 17 is arranged in parallel with the second tray plate 10 and on one side of the second connecting rod 15, and is used to abut against the second connecting rod 15.

[0055] The second supporting plate 10 is inserted into the movable slot 13 at both ends, and the intersection position between the first connecting rod 14 and the second connecting rod 15 is in the middle of the length direction of the second connecting rod 15. The spring 16 is arranged in the lower half of the second connecting rod 15. During the start of the screening conveyor belt 1, the egg supporting assembly 7 moves forward, and one side of the second connecting rod 15 contacts the discharging rod 17. The egg supporting assembly 7 continues to move forward, and the lower end of the second connecting rod 15 rotates around the hinge point, so that the opening degree between the first connecting rod 14 and the second connecting rod 15 increases. The first supporting plate 9 is fixed, so the second supporting plate 10 moves away from the moving direction, the distance between the first supporting plate 9 and the second supporting plate 10 increases, and the marinated eggs fall between the first supporting plate 9 and the second supporting plate 10, pass through the outlet, enter the vacuum packaging device 2, and realize automatic feeding of the marinated eggs.

[0056] It is worth noting that the outlet is inclined, and the length axis of the marinated eggs is in the horizontal plane, rolls along the inclined outlet, can keep the posture unchanged, enters the filling area, and can avoid the marinated eggs falling vertically and falling on the filling area, causing cracking or jumping of the marinated eggs.

[0057] The outlets of each screening conveyor belt 1 in the embodiment are arranged in different positions and correspond to different vacuum packaging devices 2.

[0058] Each screening conveyor belt 1 corresponds to a vacuum packaging device 2, and the outlets are staggered. In the embodiment, two outlets are preferably arranged at the front and rear of the screening conveyor belt 1, and the lengths of the outlets are different.

[0059] The vacuum packaging device 2 in the embodiment is arranged below the outlet. The vacuum packaging device 2 comprises a lower film heating assembly, a forming die, a filling area, an upper film area, a vacuum sealing assembly, and a cutting assembly arranged in sequence.

[0060] The lower film heating assembly comprises a heater for heating the passing stretch film.

[0061] The forming die comprises a stretching member and a die plate. The surface of the die plate is provided with a plurality of grooves corresponding to the shape of the marinated eggs, and the arrangement form of the grooves is consistent with the bearing part 11, that is, parallel in the length direction. The stretching member is used to stretch the heated stretch film to fit the grooves. For the size of the marinated eggs to be processed, the size of the grooves and the distance between the grooves are set correspondingly.

[0062] The filling area is located directly below the outlet, and the marinated eggs automatically fall into the grooves.

[0063] The upper film area is used for film coating from the upper part of the marinated eggs.

[0064] The vacuum sealing assembly is used for vacuum sealing of the package.

[0065] The slitting assembly includes a plurality of cross and longitudinal cutters for slitting the whole package into single products.

[0066] It is worth mentioning that the template is arranged on the conveying line composed of the chain, the support shaft and the metal plate, and is continuously conveyed forward. The image sensor is arranged in the filling area. After the halogen egg is fallen into the groove, the conveying line is controlled to move forward by a distance of one groove, so that the halogen egg is automatically packaged.

[0067] When the present application is used, first, the processed halogen egg is poured into the tray 3, the automatic feeding device is started, the tray 3 vibrates, the halogen egg is continuously adjusted in the tray 3 and uniformly scattered, and is raised along the spiral chute 4 until the halogen egg passes through the feeding port 5, the halogen egg falls from the feeding port 5 to the upper layer of the screening conveying belt 1, that is, the halogen egg falls on the egg holder assembly 7. The halogen egg is continuously received and vibrated on the egg holder assembly 7, the posture of the halogen egg is changed, the halogen egg with a proper size is laid on the bearing part 11, and the smaller halogen egg is changed into a vertical direction and falls from the passing part 12 to the lower layer of the screening conveying belt 1. The halogen egg on the lower layer of the screening conveying belt 1 is also received and vibrated, the posture of the halogen egg is changed, and the halogen egg is changed into a horizontal direction and laid on the bearing part 11 in the process of conveying. In the process of conveying the halogen egg on the two layers forward, the halogen egg passes through the outlet part, the discharging rod 17 presses against the second connecting rod 15, the second connecting rod 15 rotates clockwise, the spring 16 is compressed, the opening degree of the first connecting rod 14 and the second connecting rod 15 is increased, that is, the second supporting plate 10 moves away from the first supporting plate 9, the halogen egg falls from the middle of the first supporting plate 9 and the second supporting plate 10, passes through the outlet part, and enters the filling area to fall on the groove covered with the lower film. Then, the halogen egg continues to move forward to be covered with the upper film, vacuum sealed, and cut into single product packages.

[0068] As shown in Figure 6 The present application also provides a use method of the halogen egg automatic grading and packaging device, which comprises the following steps:

[0069] S1, the halogen egg is poured into the automatic feeding device, and under the directional vibration force, the halogen egg is uniformly scattered and raised along the spiral chute, and sequentially falls from the discharging port to the upper layer of the screening conveying belt;

[0070] S2, the halogen egg is continuously adjusted in the posture on the egg holder assembly in the screening conveying belt until the halogen egg is laid on the bearing part, and is conveyed forward. Part of the halogen egg vertically passes through the passing part and enters the lower layer of the screening conveying belt;

[0071] S3, the halogen egg is continuously adjusted in the posture on the egg holder assembly in the lower layer until the halogen egg is laid on the bearing part, and is conveyed forward.

[0072] S4, when the halogen egg is conveyed to the outlet part, the egg holder assembly is pulled apart, the halogen egg falls from the egg holder assembly, and enters the vacuum packaging device from the outlet part to perform the packaging operation.

[0073] In the method, the halogen eggs are adjusted in posture by using the vibration force from the automatic feeding device to vibrate the halogen eggs on the egg holder assembly.

[0074] The above is based on the ideal embodiment of the present application, through the above description, the relevant personnel can make various changes and modifications without deviating from the scope of the technical idea of the present application. The technical scope of the present application is not limited to the content of the specification, and must be determined according to the scope of claims.

Claims

1. An automatic grading and packaging apparatus for hard-boiled eggs, comprising: Automatic feeding device, several screening conveyor belts, and vacuum packaging device arranged below the screening conveyor belts, characterized in that: The automatic feeding device comprises a tray and a spiral chute arranged on the side wall of the tray; the lower part of the tray is provided with a pulse electromagnet; the upper end of the spiral chute is provided with a feeding port; the pulse electromagnet is used to drive the tray to vibrate vertically up and down, thereby providing vibration force to the screening conveyor belt; The screening conveyor belt is fixedly connected with the outer wall of the automatic feeding device, and several screening conveyor belts are linearly arrayed in the vertical direction; the screening conveyor belt comprises a shell, an annular transmission member movably arranged in the shell, and several egg tray assemblies arranged on one side of the annular transmission member; the upper and lower surfaces of the shell corresponding to the position of the feeding port are both open; the lower surface of the shell is provided with an outlet portion, and the vacuum packaging device is arranged below the outlet portion; Several egg tray assemblies are equidistantly distributed along the annular transmission member; the egg tray assembly comprises a connecting plate, a first supporting plate and a second supporting plate arranged between the connecting plates; the connecting plate is fixedly connected with the surface of the annular transmission member; the first supporting plate and the second supporting plate are symmetrical and have the same shape; the surfaces of the first supporting plate and the second supporting plate are both provided with a bearing portion and a passing portion; the passing portion is arranged at the middle position of the bearing portion.

2. The automatic grading and packaging device for halved eggs according to claim 1, characterized in that: The screening conveyor belt is arranged around the automatic feeding device; the outlet portions on each screening conveyor belt are arranged in a staggered manner, and correspond to different vacuum packaging devices.

3. The automatic grading and packaging device for halved eggs according to claim 1, characterized in that: The bearing portion is designed as a groove, and the outer edges of the symmetrical bearing portions are combined into an oval or ovoid shape.

4. The automatic grading and packaging device for halved eggs according to claim 1, characterized in that: The passing portion is designed as a through hole, and the outer edges of the symmetrical passing portions are combined into a circular shape.

5. The automatic halved egg grading and packaging apparatus according to claim 1, characterized in that: The width of the passing portion in the same layer is smaller than the width of the central position of the bearing portion, and the width of the central position of the lower bearing portion is smaller than the width of the upper passing portion.

6. The automatic halved egg grading and packaging apparatus according to claim 1, characterized in that: The two ends of the first supporting plate are fixedly connected with the surface of the connecting plate; the surface of the connecting plate is provided with a movable slot along the length direction of the connecting plate; and the two ends of the second supporting plate are respectively inserted into the inside of the movable slot.

7. The automatic halved egg grading and packaging apparatus according to claim 1, characterized in that: The surfaces of the first supporting plate and the second supporting plate are respectively provided with a first connecting rod and a second connecting rod; the first connecting rod and the second connecting rod are hinged; the length of the second connecting rod is greater than the length of the first connecting rod; one side of the second connecting rod is provided with a spring; and the upper end of the spring is fixedly connected with the side surface of the first connecting rod. A discharging rod is arranged on the side wall of the shell and above the outlet portion; the discharging rod is arranged in parallel with the second supporting plate and on one side of the second connecting rod, and is used to abut against the second connecting rod.

8. The automatic halved egg grading and packaging apparatus according to claim 1, characterized in that: The vacuum packaging device is arranged below the outlet portion; the vacuum packaging device comprises a lower film heating assembly, a forming die, a filling area, an upper film area, a vacuum sealing assembly, and a slitting assembly arranged in sequence; The lower film heating assembly comprises a heater for heating the passing stretching film; The forming die comprises a stretching member and a die plate, the surface of the die plate is provided with a plurality of grooves corresponding to the shape of the halogen eggs, and the stretching member is used to stretch the heated stretching film to fit the grooves; The filling area is located directly below the outlet, and the halogen eggs automatically fall into the grooves; The upper film area is used to coat the upper part of the halogen eggs; The vacuum sealing assembly is used to vacuum seal the package; The slitting assembly comprises a plurality of transverse and longitudinal cutters for slitting the whole package into single products.

9. A method of using a halved egg automatic grading and packaging apparatus according to any one of claims 1-8, characterized in that, The method comprises the following steps: S1. Pouring the halogen eggs into the automatic feeding device, under the directional vibration force, the halogen eggs are uniformly scattered and rise forward along the spiral chute, and then fall down from the discharge port to the upper layer of the screening conveyor belt; S2. The halogen eggs on the egg holder assembly in the screening conveyor belt continuously adjust the posture until the halogen eggs are placed flat on the carrying part and transported forward, wherein part of the halogen eggs vertically pass through the passing part and enter the lower layer of the screening conveyor belt; S3. The halogen eggs on the lower layer of the egg holder assembly continuously adjust the posture until the halogen eggs are placed flat on the carrying part and transported forward; S4. When the halogen eggs are transported to the outlet, the egg holder assembly is pulled apart, the halogen eggs fall off the egg holder assembly and enter the vacuum packaging device from the outlet for packaging operation.

10. The method of using a halved egg automatic grading and packaging apparatus of claim 9, wherein: In the S2 and S3, the vibration force from the automatic feeding device is used to vibrate the halogen eggs on the egg holder assembly to adjust the posture of the halogen eggs.

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