Chestnut feeding method and chestnut feeding production line used therefor

Abstract

The present invention aims to solve the technical problem that the oscillating wire of the chestnut turning device in the existing chestnut feeding production line cannot effectively turn over the passing chestnuts, resulting in poor turning effect, and to solve the deficiency that the existing chestnut screening device adopts a structure combining a blowing device and a visual device, which makes the chestnut screening speed slow and the energy consumption high. The present invention provides a chestnut feeding method and a chestnut feeding production line used therefor. The chestnut feeding production line includes a chestnut turning device, which includes a turning base frame, a turning panel, an eccentric wheel, a turning motor, and a slide rail slider mechanism. With the chestnut feeding production line of the present invention, the chestnuts are guided forward by the inclined surface to realize chestnut turning and transportation. The entire equipment has a simple structure and a reliable turning action. With the feeding method of the present invention, the chestnuts keep the plane facing downward and move forward. With the method of the present invention, the chestnuts are reliably turned over, and the chestnuts with curved surfaces are basically turned over, which makes the equipment structure simple.

Description

Technical Field

[0001] The present invention relates to the technical field of chestnut processing, in particular to a chestnut feeding method and a chestnut feeding production line used therefor. Background Art

[0002] Frozen chestnuts are very popular with consumers for their unique taste and flavor as soon as they are put on the market. In order to make it easier for consumers to eat, it is necessary to make an incision on the surface of the chestnut so that consumers can easily peel off the shell and eat it. For the appearance quality of the product, the incision surface is required to be on the curved surface of the chestnut, and the incision position is located at the midline of the length of the chestnut, and the midline along the length direction of the chestnut plus the front and back sides is fully open. In order to meet the above requirements, the chestnut needs to be facing upward with the curved surface and downward with the flat surface before incision. In the prior art, a notching machine is used to cut chestnuts. Due to the structural limitations of the notching machine, the chestnuts need to be adjusted in posture so that the curved surface of the chestnut faces upward and are sent to the incision one by one. The size of the chestnuts needs to be not much different to ensure that the incision is centered. Since there are differences between individual chestnuts, they can be divided into round chestnuts, triangular chestnuts, double-sided flat chestnuts, and semi-circular chestnuts ( Figure 1From left to right). Among them, semi-circular chestnuts account for the largest proportion, and the other three account for a smaller proportion. Therefore, it is impossible to ensure that the position of the chestnut to be cut is the arc surface, the center position in the length direction, and adapted to the rhythm of the cutting machine, which makes the cutting position inaccurate and affects the appearance of the chestnut. It is necessary to adjust the posture of the chestnut, turn over the chestnut with the arc surface on top, adjust the plane of the chestnut to the bottom, screen the chestnuts to screen out chestnuts of other shapes except semi-circular chestnuts from the production line, and transport them at intervals to adapt the distance between the chestnuts to the rhythm of chestnut cutting. In the prior art, a structure combining a blowing device and a visual device is used to screen chestnuts that are not facing downward. The screening device using this structure requires the visual system to be linked with the blowing device, so the reaction is relatively slow. Therefore, the conveying speed of the chestnuts is limited. In addition, the air of the blowing device is required to have a certain pressure and cannot be dispersed. Therefore, the requirements are high and the energy consumption is large. Furthermore, in the prior art, a swing wire mechanism is used to turn the chestnuts over, and multiple swing wires are arranged to form a swing wire rack, each swing wire is in an outwardly convex arc shape, and the swing wire rack is arranged along the running direction of the belt, and a chestnut groove is arranged in the length direction of the belt, so that the chestnuts are restricted from moving in the chestnut groove, and a swing wire groove is arranged on the groove wall of the chestnut groove, and each swing wire corresponds to a swing wire opening. The swing wire rack is driven by a cam to swing in the direction perpendicular to the running direction of the belt, that is, in the direction of the chestnut's forward movement, and the chestnut is turned over by the arc-shaped end of the swing wire. With this structure of the turning device, the chestnut is turned over by the swing wire hitting the chestnut. When hitting, the chestnut is subjected to force that is difficult to control. After being hit, the chestnut rolls and is transmitted out of the belt during the rolling process. Many chestnuts cannot be turned over, so the turning effect is not good. In addition, since the height of the swing wire is consistent, but the height of the chestnuts is different, it is impossible to act on chestnuts that are not high enough, and turning cannot be achieved. Third, the prior art uses a structure that combines a sensor and a vibrator to space the chestnuts, including two or more linear vibrating feeders, a V-shaped slide mounted on the linear vibrating feeders, and a photoelectric sensor for detecting the distance between adjacent chestnuts. During use, when the chestnuts enter the V-shaped slide from the output end of the vertical posture adjustment trough, the chestnuts move on the V-shaped slide under the operation of multiple linear vibrating feeders. Through vibration, the chestnuts adjust horizontally within the V-shaped slide under the action of their own weight. When the distance between two chestnuts is close, the photoelectric sensor sends a signal to stop the previous linear vibrating feeder, and the next linear vibrating feeder continues to work. When the chestnuts move a certain distance apart, the previous linear vibrating feeder resumes operation, completing the spacing between the two chestnuts. With the above structure, because the frequencies of the linear vibrating feeders are consistent, the chestnuts often cluster together. The linear vibrator located in the front frequently starts and stops, causing the equipment to operate unstable and fail to achieve the actual spacing effect. Summary of the Invention

[0003] The purpose of the present invention is to provide a chestnut feeding method and a chestnut feeding production line used therefor to address the technical problem that the chestnut turning device in the existing chestnut feeding production line cannot effectively turn the chestnuts passing through, resulting in poor turning effect.

[0004] A further object of the present invention is to provide a chestnut feeding method and a chestnut feeding production line used therefor to address the shortcomings of the existing chestnut screening device, which uses a structure combining a blowing device and a visual device, resulting in slow chestnut screening speed and high energy consumption.

[0005] A further object of the present invention is to provide a chestnut feeding method and a chestnut feeding production line used therefor, in order to address the technical problems of frequent start-stop and poor spacing effect of the linear vibration feeder of the prior art spacing device.

[0006] The present invention adopts the following technical solutions to solve the technical problems of the present invention:

[0007] A chestnut feeding production line includes a chestnut turning device, the turning device includes a turning base, a turning panel, an eccentric wheel, a turning motor, and a slide rail and slider mechanism, the turning motor is located at one end of the base, the eccentric wheel is arranged at the end of its output shaft, the slide rail of the slide rail and slider mechanism is fixedly arranged at the other end of the turning base, the length direction of the slide rail is parallel to the rotation plane of the eccentric wheel, one end of the turning panel is fixedly connected to one end of the eccentric wheel connecting plate, the other end of the eccentric wheel connecting plate is hingedly connected to the eccentric wheel, the other end of the turning panel is fixedly connected to one end of the slider connecting plate, the other end of the slider connecting plate is hingedly connected to the slider, the length direction of the turning panel is parallel to the rotation plane of the eccentric wheel, and the front end thereof is higher than the rear end and is tilted, and the cross-section of the turning panel is V-shaped or a trapezoid with a short bottom side that is open on the top;

[0008] The flip panel is provided with through holes for increasing friction; and / or when the flip panel is a V-shaped plate, the opening angle of the discharge end thereof gradually increases;

[0009] It also includes a chestnut screening device, which includes a screening conveyor belt, a screening motor, and a screening belt transmission device. The screening conveyor belt is arranged on a bottom frame of the chestnut screening device through a pulley. The screening motor drives the screening conveyor belt to run around the pulley through the screening belt transmission device. A screening belt tilting device is provided below the screening conveyor belt. The screening belt tilting device tilts the belt body of the screening belt from one side to the other side along its running direction and supports the conveyor belt body.

[0010] The screening belt tilting device includes an inclined shaft and a built-in bearing arranged on the inclined shaft, the two ends of the inclined shaft are respectively connected to the frames on both sides of the screening conveyor belt, and one end of the inclined shaft is higher than the other end and is inclined, the discharge end of the flip panel is docked with the feed end of the screening conveyor belt; and / or a baffle is provided at least on the lower side of the screening conveyor belt along the length direction of the screening conveyor belt, and a discharge port is provided at the discharge end of the screening conveyor belt, the baffle is used to guide the screened chestnuts to escape from the screening conveyor belt through the discharge port;

[0011] The automatic spacing device includes a feeding vibrator and a spacing vibrator. A V-shaped vibrating plate is provided above the feeding vibrator and the spacing vibrator respectively. The two V-shaped vibrating plates are butted together at the same height. The vibration frequency of the spacing vibrator is greater than that of the feeding vibrator. The spacing vibrator vibrates at a predetermined frequency and conveys chestnuts to the chestnut supporting plate at a certain beat. Both the feeding vibrator and the spacing vibrator are linear vibrating feeders.

[0012] It also includes a chestnut screening device, which includes a screening conveyor belt, a screening motor, and a screening belt transmission device. The screening conveyor belt is arranged on a bottom frame of the chestnut screening device through a pulley. The screening motor drives the screening conveyor belt to run around the pulley through the screening belt transmission device. A screening belt tilting device is provided below the screening conveyor belt. The screening belt tilting device tilts the belt body of the screening belt from one side to the other side along its running direction and supports the conveyor belt body.

[0013] The screening belt tilting device includes an inclined shaft and a built-in bearing arranged on the inclined shaft. The two ends of the inclined shaft are respectively connected to the frames on both sides of the screening conveyor belt, and one end of the inclined shaft is higher than the other end and is arranged to be inclined. The discharge end of the flip panel is docked with the feed end of the screening conveyor belt, and the discharge end of the screening conveyor belt is docked with the V-shaped vibration plate provided on the spacing vibrator.

[0014] And / or a baffle is provided at least on the lower side of the screening conveyor belt along the length direction of the chestnut screening plate, and a discharge port is provided at the discharge end of the screening conveyor belt to prevent the screened chestnuts from falling out of the screening conveyor belt.

[0015] A method for feeding chestnuts, comprising the steps of turning the chestnuts over:

[0016] The chestnut is tilted downward and / or vibrated by shaking and / or vibrating it, and the chestnut is restrained by inclined surfaces on both sides of the chestnut's forward direction to prevent it from moving to the sides, so that the chestnut is turned over while moving forward.

[0017] After the chestnuts are turned over, they are screened, and the chestnuts with the arc surface downward are screened out of the production line. The following chestnut screening method is adopted, the chestnuts with the plane facing downward after the turning are fed into an inclined conveyor belt with one side higher and the other side lower, so that the friction force between the chestnut plane and the conveyor belt surface is greater than the gravity component of the chestnuts. When the chestnuts pass through the inclined conveyor belt, the friction force of the chestnuts with the arc surface downward is less than the gravity component, so that they leave the conveyor belt from the lower side of the conveyor belt; and or, it also includes a chestnut spacing step, through which the distance between two adjacent chestnuts reaches a predetermined value, and the chestnuts are separated by the following chestnut spacing method: the received chestnuts are linearly vibrated at least twice in succession, the frequency of the latter linear vibration is higher than the frequency of the previous linear vibration, and the forward speed of the chestnut in the front is increased by the frequency of the latter linear vibration being higher than the frequency of the previous linear vibration, thereby widening the distance between the chestnuts and the rear chestnuts to achieve spacing, and the distance adjustment is achieved by adjusting the difference between the vibration frequencies applied to the chestnuts in the front and the rear;

[0018] When the two inclined planes intersect, the angle of intersection of the two inclined planes is adjusted at the discharge end to increase the angle of the opening formed by the two inclined planes, and or the chestnut feeding production line described in one of claims 1-7 is used to implement this method.

[0019] The advantages and beneficial effects of the present invention are:

[0020] The chestnut feeding production line of the present invention adopts a structure combining a cam and a linear guide rail to make the flip panel rock or vibrate back and forth. Since the cam makes a small periodic up and down movement during the rotation process, the flip panel shakes up and down. The chestnuts with the arc surface downward are unstable, while the chestnuts with the flat surface downward are stable, which causes the chestnuts with the arc surface downward to roll or flip. Since the contact of the flat surface is more stable than the contact of the arc surface, the chestnuts stabilize after the flat surface moves downward during the flipping and rolling process. In addition, the flip panel is a V-shaped plate or a trapezoidal plate with inclined surfaces on both sides. The linear guide rail guides the flip panel to rock back and forth. Therefore, the chestnuts are guided forward by the inclined surface to realize the flipping and transportation of the chestnuts. The entire equipment has a simple structure and the flipping action is reliable.

[0021] The feeding method of the present invention is adopted, and the method of shaking and / or vibrating back and forth is used to make the flat surface of the chestnuts downward and the arc surface upward, and at the same time, the chestnuts are constrained by inclined surfaces on both sides of the chestnut's forward direction to make them move forward instead of moving to the sides, so that the chestnuts are turned over and moved forward at the same time to achieve chestnut turning over, and the chestnuts are moved forward and rolled by shaking or vibrating back and forth. When the chestnut plane is downward, since the flat contact is more stable, the chestnut keeps the plane downward, and the chestnut is turned over. In addition, when the chestnut moves forward, the two sides are guided by the inclined surfaces, so the chestnut keeps the plane downward and moves forward. The method of the present invention is used to achieve reliable chestnut turning, and the chestnuts with the arc surface are basically turned over, which makes the equipment structure simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a photo of the chestnut-shaped appearance.

[0023] Figure 2 This is a schematic structural diagram of an embodiment of the chestnut feeding production line of the present invention;

[0024] Figure 3 This is a schematic structural diagram of an embodiment of a turning device and a chestnut screening device of the present invention;

[0025] Figure 4 This is a schematic structural diagram of an embodiment of the tilting device in the chestnut screening device of the present invention;

[0026] Figure 5 This is a schematic structural diagram of an embodiment of the automatic spacing device of the present invention;

[0027] Figure 6 This is a schematic structural diagram of an embodiment of a vibration plate in an automatic spacing device of the present invention;

[0028] Figure 7 for Figure 6 Stereoscopic image.

[0029] Description of Reference Numerals

[0030] 1- flip device, 101- flip chassis, 102- eccentric wheel, 105- flip panel, 103- eccentric wheel connecting plate, 104- flip motor, 106- slide rail and slider mechanism, 107- slider connecting plate,

[0031] 2- chestnut screening device, 201- chestnut screening device chassis, 202- screening belt transmission device, 203- screening motor, 204- screening conveyor belt, 205- built-in bearing, 206- tilt shaft,

[0032] 3-automatic spacing device, 301-spacing device chassis, 302-spacing device bracket, 303-vibrating plate, 304-feeding vibrator, 305-spacing vibrator. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below through specific examples. The following examples are only illustrative and not restrictive, and the scope of protection of the present invention cannot be limited thereto.

[0034] The present invention uses the following method to achieve chestnut feeding: first, the chestnuts are turned over so that the flat surface faces downward, then the chestnuts are sorted, chestnuts with the curved surface facing upward are removed from the production line, and then the chestnuts are spaced so that the distance between adjacent chestnuts matches the frequency of downstream chestnut cutting, and then the chestnuts are continuously fed one by one to the chestnut cutting device.

[0035] The present invention preferably uses the following method to turn the chestnut over: the chestnut is turned over by rocking and / or vibrating back and forth so that the plane of the chestnut is turned downward and the arc surface is turned upward. At the same time, inclined surfaces are used on both sides of the chestnut's forward direction to constrain the chestnut so that it moves forward and does not move to the sides, so that the chestnut moves forward while turning over. The two inclined surfaces can be made to intersect so that the chestnut supports the plane of the chestnut with one inclined surface and limits the arc surface of the chestnut with the other inclined surface. A narrow plane can also be set between the two inclined surfaces, and the distance between the bottoms of the two inclined surfaces is no greater than the thickness of the chestnut. It can also play the role of supporting the chestnut plane with one inclined surface and limiting the chestnut with the other inclined surface. It can also be made so that the distance between the bottoms of the two inclined surfaces is greater than the thickness of the chestnut, so that the chestnut moves along the intersection of the two inclined surfaces and the plane. When the two inclined planes intersect, it is best that the angle between the inclination angle of the inclined plane at the discharge end and the horizontal plane gradually decreases, so that the notch formed by the two inclined planes gradually widens, so that the chestnuts with the plane facing downward can smoothly transition between the two planes, allowing them to stably enter the plane of the next process.

[0036] The following method is used to achieve chestnut screening: In the following description, for clarity, the position of the belt pulley is referred to as the end, and the direction along the length of the belt is referred to as the side. The turned chestnuts are fed onto an inclined conveyor belt with one side higher and the other lower, so that the friction between the chestnut plane and the conveyor belt surface is greater than the chestnut's gravity. As the chestnuts pass through the inclined conveyor belt, the friction of the chestnuts on the downward curved surface is less than their gravity, causing them to roll off the conveyor belt from the lower side. Preferably, a baffle is provided on the lower side of the conveyor belt, and an outlet is provided on the lower side at the discharge end. When the chestnuts are free from the baffle, they are discharged from the outlet for recovery.

[0037] The following method is used to separate the chestnuts: the received chestnuts are subjected to at least two linear vibrations in succession, and the frequency of the latter linear vibration is higher than that of the previous linear vibration. By making the frequency of the latter linear vibration higher than that of the previous linear vibration, the forward speed of the chestnut in the front is increased, thereby widening the distance between the chestnut and the rear to achieve separation. The distance adjustment is achieved by adjusting the difference in the vibration frequencies applied to the chestnuts in the front and rear.

[0038] The chestnut feeding method of the present invention utilizes the principle that a flat surface is the most stable when turning the chestnuts over and guides the chestnuts' forward direction through the inclined surface. The method is simple and reliable. The principle that the friction of a flat surface is greater than the friction of an arc surface is utilized during screening. The chestnuts are passed through a conveyor belt tilted to one side, so that the chestnuts with the arc surface facing downward are separated from the production line. The method is simple and saves power. The spacing method of the present invention utilizes the different forward speeds of the chestnuts due to the different vibration frequencies between linear vibrators. The chestnuts are first vibrated at a lower frequency and then at a higher frequency, so that the forward speed of the chestnuts in the front is greater than that of the chestnuts in the back. It is only necessary to adjust the frequency of the vibrator according to the beat of the downstream equipment. It is simple, reliable, and the spacing control is relatively accurate.

[0039] The chestnut feeding production line with the following structure can realize the above-mentioned chestnut feeding method:

[0040] The present invention preferably adopts the following structure of the chestnut feeding production line. Figure 2 As shown, the chestnut feeding production line includes a chestnut turning device 1, a chestnut screening device 2 and an automatic distance separating device 3. The chestnut turning device is used to turn the flat surface of the chestnut downward and the arc surface upward. The chestnut screening device is used to separate the round chestnuts, triangular chestnuts and double-sided flat chestnuts from the production line. The automatic distance separating device is used to adjust the distance between the chestnuts so that they can enter the chestnut support plate at a certain rhythm.

[0041] like Figure 2-7As shown, the chestnut turning device includes a turning base 101, a turning motor 104, a turning panel 105, and a slide rail slider mechanism 106. The turning panel adopts a V-shaped opening plate. The turning base 101 includes a front bracket and a rear bracket. The turning motor is located on the front bracket. The eccentric wheel 102 is arranged at the end of the eccentric wheel motor output shaft. The eccentric wheel connecting plate 103 is fixedly connected to the front lower surface of the turning panel and is hingedly connected to the eccentric wheel. Note that the eccentric wheel must be arranged at the end of the output shaft of the motor shaft to prevent the eccentric wheel connecting plate and the turning panel 105 from interfering with the eccentric wheel motor shaft when the eccentric wheel rotates. The slide rail slider mechanism is arranged above the rear bracket, and the length direction of its slide rail is arranged parallel to the rotation plane of the eccentric wheel. The slider connecting plate 107 is hingedly connected to the slider. The other end of the slider connecting plate is fixedly connected to the rear lower surface of the turning panel. When the eccentric wheel motor rotates, it drives the turning panel to rock back and forth, guided by the slide rail. The length of the flap is parallel to the rotational plane of the eccentric wheel, and the front end of the flap is preferably higher than the rear end. This facilitates the forward movement of the chestnuts. The flap is preferably provided with through holes distributed throughout the flap to increase friction between the chestnuts and the flap, preventing wet chestnuts from slipping and failing to flip properly. With the chestnut flipping device using the above structure, the flap moves back and forth under the combined action of the cam and guide rail, causing the chestnut with the curved surface facing downward to shake and flip, causing the chestnut to flip over, resulting in a stable posture with the flat surface facing downward. Thus, the chestnut with the curved surface facing upward can be turned over with its flat surface facing downward. Chestnuts whose flat surface contacts the inclined surface of the flap 105 will not flip over, but will only be pushed forward by the flap. Ultimately, the majority of chestnuts transported by the flipping device 1 are in a state with the flat surface at the bottom and the curved surface at the top. Of the two inclined surfaces of the V-shaped flap, one provides support for the chestnut's flat surface, while the other restricts the chestnut's forward movement, preventing it from moving to the sides. Of course, it is also possible to use an open plate with a trapezoidal cross-section, where the bottom width is smaller than the opening width. This way, as the chestnuts move forward, they tend to move along the slope on one side, while the slope on the other side prevents them from straying from the forward direction. When a V-shaped flap is used as the flap, the V-shaped opening angle gradually increases at the discharge end, causing the inclination angle of the side plate to gradually decrease with the horizontal plane, allowing the chestnuts to gradually transition to the position between the two slopes, helping the chestnuts to smoothly enter the screening conveyor belt of the next process.

[0042] The chestnut screening device 2 is located downstream of the chestnut turning device and receives chestnuts with the plane facing downwards that are conveyed by the turning panel. The main structure of the chestnut screening device is a conveyor belt device. Its screening conveyor belt 204 is set on the screening device chassis 201 via a pulley. The screening belt transmission device 202 is connected to the output end and the driving pulley of the screening motor 203. The motor drives the screening conveyor belt to run around the pulley, and the screening conveyor belt is docked with the turning panel. At least two screening belt tilting devices are provided below the screening conveyor belt 204. The screening belt tilting devices tilt the belt body from one side to the other along its running direction. When tilted, the height of the lower side is flush with the conveying plane constructed by the pulley. The present invention adopts a screening belt tilting device with the following structure, including a tilting shaft 206 and a built-in bearing 205 arranged outside the tilting shaft 206. The tilting shaft tilts from one side of the screening conveyor belt to the other side in a plane perpendicular to the running direction of the screening conveyor belt. The two ends of the tilting shaft are respectively connected to the corresponding sides of the screening device chassis. One end of the tilting shaft is higher and the other end is lower and is tilted relative to the horizontal plane, so that the built-in bearing is also tilted at the same angle. At least one screening belt tilting device is provided below each end of the screening conveyor belt. The screening conveyor belt located between the pulleys is supported and tensioned by the built-in bearing. Since the built-in bearing is tilted, the screening conveyor belt also tilts from one side of the belt to the other side, pushing out an inclined surface of the screening conveyor belt. After the screening motor is started, the screening conveyor belt conveys the received chestnuts forward. When the chestnuts reach the screening belt tilting device in front, the chestnuts with qualified posture, that is, the chestnuts with the flat surface at the bottom and the curved surface at the top, have a large friction force due to the surface contact between them and the screening conveyor belt. Under the action of friction, when the screening conveyor belt 204 is tilted by the tilting device, they will not slide down. However, chestnuts with unqualified posture and round chestnuts have a small friction force due to the point contact with the screening conveyor belt. When the screening conveyor belt is tilted by the tilting device, they will roll down to the lower side of the belt. Therefore, the chestnuts with unqualified posture are screened out. It is best to set a baffle at least on the lower side of the screening conveyor belt along the running direction of the conveyor belt to block the chestnuts that roll down from the screening conveyor belt and make them move forward under the action of the screening conveyor belt. A discharge port is set at the discharge end of the screening conveyor belt so that the chestnuts that roll down along the baffle can be discharged from the screening conveyor belt through the discharge port, which is convenient for chestnut collection and reuse.

[0043] The present invention adopts an automatic spacing device 3 with the following structure. It includes a feeding vibrator 304, a spacing vibrator 305 and a vibration plate 305. The feeding vibrator 304 and the spacing vibrator are arranged in front and back, and a vibration plate 305 is fixed above each vibrator. The two vibration plates 305 have the same structure and are both V-shaped plates, which can ensure that the chestnuts with adjusted posture no longer change their posture during the spacing process, so that their planes are always facing downward. The two vibration plates are connected front and back and arranged at the same height. The feeding vibrating plate is connected to the screening conveyor belt, and the spacing vibrating plate is connected to the chestnut supporting plate. The vibration frequency of the spacing vibrator is greater than the vibration frequency of the feeding vibrator. In this way, the chestnuts are adjusted in direction on the feeding vibrator under the action of the vibrator and the V-shaped plate, and their length directions are all facing the forward direction, which is commonly known as straightening in the industry. After the straightened chestnuts reach the spacing vibrator, due to the high vibration frequency of the spacing vibrator, the forward movement speed is accelerated, thereby widening the distance between the chestnuts to achieve distance adjustment between the chestnuts. Both the feeding vibrator and the spacing vibrator are mounted on the spacing device chassis 301. To facilitate height adjustment of the spacing device, a spacing device bracket 302 is also provided. The spacing device bracket is fixed above the spacing device chassis via adjusting bolts. Both the feeding vibrator and the spacing vibrator are fixed above the spacing device bracket. The height of the spacing device is adjusted by adjusting the length of the adjusting bolts to maintain a horizontal position between the vibrating plate and the output end of the screening conveyor belt. In this device, the vibrating plate 303 serves as a channel for conveying chestnuts. Its structure is designed as a V-shaped plate with an angle at the center. This design ensures that the chestnuts do not flip horizontally when conveyed on the vibrating plate 303. The two vibrators are set to different vibration frequencies to increase the speed of chestnut feeding, achieving chestnut spacing while ensuring that the chestnuts are aligned in their length direction, providing a foundation for the subsequent hand clamping of the chestnuts during the ring cutting operation. The spacing device bracket 302 can be adjusted in height via bolts to ensure that the automatic spacing device 3 and the chestnut screening device 2 are on the same horizontal plane. In the present invention, the feeding vibrator and the spacing vibrator both adopt linear vibrating feeders.

Claims

1. A chestnut feeding production line, including a chestnut turning device, characterized in that: The cam is fixedly mounted on the frame, and the cam is connected to the transmission mechanism, and the cam is connected to the transmission mechanism, and the cam is connected to the transmission mechanism, and the cam is connected to the transmission mechanism, and the cam is connected to the transmission mechanism. A screening belt tilting device is provided, which tilts the belt body of the screening conveyor belt from one side to the other side along its running direction and supports the screening conveyor belt body. The screening belt tilting device includes a tilting shaft and a built-in bearing arranged on the tilting shaft. The two ends of the tilting shaft are respectively connected to the frames on both sides of the screening conveyor belt, and one end of the tilting shaft is tilted higher than the other end. The discharge end of the flip panel is docked with the feed end of the screening conveyor belt; when the screening motor is started, the screening conveyor belt will receive the chestnuts When the chestnuts are transported forward, they will reach the tilting device of the screening belt in front. The chestnuts with qualified posture, that is, the chestnuts with the flat surface at the bottom and the arc surface at the top, will not slide down the tilted screening conveyor belt due to the surface contact between them and the screening conveyor belt. However, the chestnuts with unqualified posture will roll to the lower side of the screening conveyor belt when passing through the screening conveyor belt due to the point contact between them and the screening conveyor belt. Thus, the chestnuts with unqualified posture will be screened out.

2. A chestnut feeding production line according to claim 1, characterized in that: The flip panel is provided with through holes for increasing friction; and / or when the flip panel is a V-shaped plate, the opening angle of the discharge end thereof gradually increases.

3. A chestnut feeding production line according to claim 1, characterized in that: A baffle is provided at least on the lower side of the screening conveyor belt along the length direction of the screening conveyor belt, and a discharge port is provided at the discharge end of the screening conveyor belt. The baffle is used to guide the screened chestnuts to escape from the screening conveyor belt through the discharge port.

4. A chestnut feeding production line according to claim 1, characterized in that: It also includes an automatic spacing device, which includes a feeding vibrator and a spacing vibrator. V-shaped vibrating plates are respectively arranged above the feeding vibrator and the spacing vibrator. The two V-shaped vibrating plates are connected at the same height front and back. The vibration frequency of the spacing vibrator is greater than the vibration frequency of the feeding vibrator. The spacing vibrator vibrates at a predetermined frequency and conveys chestnuts to the chestnut support plate at a certain rhythm. The feeding vibrator and the spacing vibrator are both linear vibrating feeders. The feeding vibrating plate is connected to the screening conveyor belt, and the spacing vibrating plate is connected to the chestnut support plate.

5. A method for feeding chestnuts, characterized in that: The chestnut feeding production line according to any one of claims 1 to 4 includes the step of turning the chestnuts over: The method of shaking and / or vibrating back and forth is used to make the flat surface of the chestnuts downward and the arc surface upward, and at the same time, the chestnuts are constrained by inclined surfaces on both sides of the chestnut's forward direction to make them move forward instead of moving to the sides, so that the chestnuts are turned over and moved forward at the same time to achieve chestnut turning over. After the chestnuts are turned over, the chestnuts are screened and the chestnuts with the arc surface downward are screened out of the production line. The following chestnut screening method is used, and the chestnuts with the flipped flat surface downward are sent to an inclined screening conveyor belt with one side higher and the other side lower, so that the friction force between the chestnut flat surface and the surface of the screening conveyor belt is greater than the gravity component of the chestnuts. When the chestnuts pass through the inclined screening conveyor belt, the friction force of the chestnuts with the arc surface downward is less than its gravity component, and thus they leave the screening conveyor belt from the lower side of the screening conveyor belt.

6. The chestnut feeding method according to claim 5, characterized in that: It also includes a chestnut separation step, through which the distance between two adjacent chestnuts reaches a predetermined value, and the chestnuts are separated by the following chestnut separation method: the received chestnuts are subjected to at least two linear vibrations in succession, and the frequency of the latter linear vibration is higher than the frequency of the former linear vibration. By making the frequency of the latter linear vibration higher than the frequency of the former linear vibration, the forward speed of the chestnut in the front is increased, thereby widening the distance between the chestnut and the rear to achieve separation, and the distance adjustment is achieved by adjusting the difference in the vibration frequencies applied to the chestnuts in the front and rear.

7. The chestnut feeding method according to claim 5, characterized in that: When the two inclined surfaces intersect, the angle of intersection of the two inclined surfaces is adjusted at the discharge end so that the angle of the opening formed by the two inclined surfaces is increased.

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