Grape bunch screening machine and sulfur-free red wine brewing method based on the same

Abstract

The present invention belongs to the technical field of wine brewing, and specifically discloses a grape bunch screening machine and a method for brewing sulfur-free red wine based on the machine. The machine comprises a destemming mechanism for separating fruit grains and stems; a vibrating screening mechanism for screening and removing fine impurities and necrotic fruit; a stem guiding mechanism comprising a material guide member in the shape of a fence and articulated and swinging arrangement; and a stem removing mechanism comprising a hollow roller rotatably mounted below the material guide member. The surface of the hollow roller is telescopically mounted with a toggle rod staggered with the fence bars on the material guide member. When the hollow roller rotates clockwise, the toggle rod is gradually retracted into the hollow roller under the action of magnetic attraction, and the outer end of the toggle rod is kept inserted into the material guide member. When the toggle rod rotates to the top of the hollow roller, it retracts until its outer end is separated from the material guide member, thereby separating the stems. The present invention accelerates the efficiency and effect of raw material destemming and screening, thereby reducing the raw material microbial base number and promoting the subsequent brewing of sulfur-free red wine.

Description

Technical Field

[0001] The present invention relates to the technical field of wine brewing, in particular to a grape bunch screening machine and a method for brewing sulfur-free red wine based on the machine. Background Art

[0002] In conventional wine, SO2, as the primary additive, plays a dual role in the winemaking process, both as an antibacterial and anti-oxidant, ensuring product quality. However, the addition of excessive sulfur dioxide can also have adverse effects on the wine itself. More importantly, some people are allergic to sulfur dioxide (SO2), commonly used in wine, further limiting their consumption of conventional wine. Consequently, as people become more health-conscious, sulfur-free wine is gaining popularity. The emergence of sulfur-free wine aligns with people's pursuit of healthy, natural foods, and its importance lies in its healthier, purer, and more environmentally friendly qualities. However, the production of sulfur-free wine presents a series of technical difficulties. Due to the lack of SO2 protection, wine is more susceptible to oxidation and microbial contamination, leading to quality degradation or even deterioration.

[0003] Therefore, a grape bunch selection and screening machine is designed to achieve stem separation through the cooperation of a stem guiding mechanism and a stem removing mechanism to replace the traditional multi-layer grading guide roller separation method, so as to speed up the efficiency and effect of raw material stem removal and screening to ensure the quality of grape berries, thereby reducing the raw material microbial base, ensuring the sanitary condition of the raw materials, and promoting the subsequent brewing of sulfur-free red wine. The purpose of the present invention is to replace the sterilization, anti-oxidation and microbial contamination inhibition effects of SO2 through raw material control, high-pressure sterilization, pressurized fermentation, closed operation, etc., and adopt closed pressurized fermentation, pressure and oxygen control throughout the process to effectively avoid pollution and prevent oxidation. Summary of the Invention

[0004] In response to the technical problems existing in the above-mentioned prior art, the present invention provides a grape bunch selection and screening machine and a method for brewing sulfur-free red wine based on the grape bunch selection and screening machine and a method for brewing sulfur-free red wine based on the grape bunch selection and screening machine can effectively solve the technical problems existing in the above-mentioned prior art.

[0005] The technical solution of the present invention is:

[0006] A grape bunch screening machine, comprising:

[0007] frame;

[0008] The stem-removing mechanism comprises a hopper mounted on the upper front end of the frame, wherein a group of relatively synchronously swinging and fence-shaped driving members and three groups of toggle assemblies connected by corresponding gear meshing are rotatably mounted in the hopper, wherein the driving members are driven by corresponding motors to drive cams to rotate and drive the driving members to swing, and the toggle assembly comprises a driving shaft and a plurality of thumbwheels fixedly mounted on the driving shaft at laterally intervals, the thumbwheels being staggered with the fence plates on the driving members, and the three thumbwheels located at the same position on the driving shaft being arranged to rotate crosswise; the multiple groups of cross-shaped thumbwheels in the three toggle assemblies rotate to sequentially receive materials, and a group of driving members pushes them left and right to separate the grape berries and stems;

[0009] a vibrating screening mechanism for screening and removing fine impurities and necrotic fruit, comprising a screening carrying platform movably mounted on a frame below the discharge port of the destemming mechanism, and a drive assembly for driving the screening carrying platform to vibrate and screen, wherein at least one screen is detachably and fixedly mounted on the screening carrying platform;

[0010] The stem guide mechanism comprises a fence-like material guide member hingedly and swingably mounted on a frame located in front of the discharge end of the vibrating screening mechanism, the material guide member comprising a plurality of fence bars spaced apart and arranged side by side. The material guide member is downwardly inclined away from the direction in which the grape berries are conveyed, and extends to a distance from the upper surface of the screening support platform. A stem conveyor belt for conveying grape stems outward is disposed below one end of the upwardly inclined material guide member.

[0011] The stem-pushing mechanism includes a hollow roller rotatably installed under the material guide member, the surface of the hollow roller can be telescopically installed with a toggle rod staggered with the fence bars on the material guide member, and the outer end of the toggle rod extends outward and is inserted into the material guide member, and the inner end of the toggle rod is inserted into the hollow roller and fixed with a corresponding iron part, and a corresponding magnet is fixedly installed horizontally in the hollow roller, and the two ends of the magnet extend outward to pass through the hollow roller and are fixed on both sides of the frame, and the distance and thickness between the magnet and the inner surface of the hollow roller are along The thickness of the material is gradually increased in the clockwise direction; when the hollow roller rotates clockwise, the magnetic attraction of the magnet to the iron part causes the toggle rod to gradually shrink into the hollow roller and keep the outer end of the toggle rod inserted into the material guide; when the toggle rod rotates to the top of the hollow roller, that is, when the toggle rod is located at the position where the thickness of the magnet is the largest, the toggle rod shrinks to the outer end and disengages from the material guide; when the vibrating screening mechanism is activated, the material is transferred to its discharge port, and the material guide intercepts the stalks on the screening carrying platform and is gradually lifted by the cyclically rotating toggle rod and transported to the stalk conveyor belt;

[0012] The material holding mechanism comprises a collecting trough fixed on the frame below the screen and a material holding frame arranged below the discharge end of the screening carrying platform.

[0013] The material guide member includes a support roller rotatably mounted on the frame, the fence bars are fixed to the support roller at equal intervals laterally and tilted downward, the end of the fence bar not connected to the support roller extends downward and is covered with a corresponding flexible protective cover, the distance between the end of the fence bar covered with the flexible protective cover and the screening support platform is greater than D1 and less than D2, where D1 is the diameter of the grape berry and D2 is twice the diameter of the grape berry.

[0014] Corresponding reset mechanisms are provided at the upper ends of both sides of the material guide member, and the reset mechanism includes a support plate fixed to the frame, and a corresponding first elastic member is connected between the support plate and the sidemost fence bar, and the first elastic member enables the material guide member to have a tendency to swing up and down.

[0015] An arc-shaped trigger plate is fixed downwardly on the material guide member below the support roller shaft. When the toggle rod is rotated to the top of the hollow roller, that is, the toggle rod is located at the position where the thickness of the magnet member is the largest, the distance between the outer end of the toggle rod and the outer surface of the hollow roller is greater than the distance between the trigger plate and the outer surface of the hollow roller, that is, the toggle rod pushes the trigger plate when it rotates.

[0016] A corresponding limiting tube is fixedly installed on the outer surface of the hollow roller, and the toggle rod is telescopically installed in the limiting tube. The outer side of the toggle rod is located between the iron part and the hollow roller and is sleeved with a corresponding second elastic part. The two ends of the second elastic part are respectively fixed to the inner side wall of the hollow roller and the iron part, and the side of the iron part facing the magnet part is rotatably installed with a corresponding abutment ball.

[0017] An auxiliary material-dipping mechanism is provided above the feed end of the material guide member, and the auxiliary material-dipping mechanism includes a rotating roller connected to the hollow roller by a gear meshing connection, and the rotation direction of the rotating roller is opposite to the rotation direction of the hollow roller, and a plurality of material-dipping members are fixedly connected to the circumferential surface of the rotating roller at equal intervals, and a plurality of material-dipping rods are arranged side by side at equal intervals on the left and right of the material-dipping members, and the material-dipping rods, fence bars and digging rods are staggered in sequence on the left and right, and the material-digging rods and the digging rods are cross-arranged; the screening bearing platform is mounted on the frame by at least four supporting spring columns installed at its end corners, and the driving assembly includes a vibration motor installed below the screening bearing platform and / or a driving motor fixedly installed on the frame 1, and a corresponding eccentric wheel is fixedly installed on the output shaft end of the driving motor, and the eccentric wheel abuts against the bottom of the screening bearing platform.

[0018] A method for brewing sulfur-free red wine based on the grape bunch screening machine described above comprises the following specific steps:

[0019] S1, screening the raw materials: feeding the harvested raw materials into the grape cluster screening machine, removing the stems, vibrating and screening, and separating the stems and fruits to obtain grape berries;

[0020] S2, freezing and high-pressure sterilization: The screened raw materials are frozen in a freezing sleeve, using an axial feeding method, and dry ice-frozen peels are added to the feeding. Then, they are added to the pressurized fermentation tank, and after entering the tank, they are sterilized by ultra-high pressure and immersed in a high-density CO2 environment;

[0021] S3, yeast inoculation, alcohol fermentation: the sterilized raw materials are inoculated with yeast and placed in a fermentation tank to maintain pressure for fermentation;

[0022] S4, malolactic fermentation: after the alcoholic fermentation is completed, lactic acid bacteria are inoculated and malolactic fermentation is carried out under controlled pressure and sealed;

[0023] S5, rapid post-processing: After fermentation, the grape wine is rapidly post-processed under a gas-protected environment. The rapid post-processing includes gelling clarification and freeze filtration.

[0024] S6, Filling: Rapid filling under sterile environment.

[0025] In step S2, during the raw material processing stage, a freezing sleeve and dry ice freezing sterilization technology are used to effectively kill microorganisms on the surface of the grapes. At the same time, high-pressure sterilization technology is combined to further reduce the base number of microorganisms in the grape juice before fermentation. After the ultra-high pressure sterilization is completed, the pressure is released to 0.1-0.2 MPa, followed by high-density CO2 immersion for 5-6 hours, and 20-25g / t pectinase OPTIZYM is added.

[0026] The alcohol fermentation in step S3 is maintained at a pressure of 0.1-0.2 MPa, and the temperature is controlled at 24-28°C during the fermentation process; the malolactic fermentation in step S4 is performed in a closed, normal-pressure fermentation throughout the entire process, and nitrogen is filled into the fermentation tank during transfer, maintaining a pressure of 0.01-0.02 MPa. By controlling the pressure in the fermentation tank, oxygen entry is effectively suppressed, and the oxygen concentration in the fermentation tank is monitored and adjusted in real time to ensure normal fermentation activity of the yeast; after the fermentation is completed, the pressure is maintained at 0.01-0.02 MPa.

[0027] The clarification step S5 uses egg white as the sizing material, with a sizing amount of 65-70 g / t. The freeze filtration process uses a scraper-type quick freezer to rapidly cool the wine to a temperature 1-2°C higher than the freezing point of the wine. The wine that passes the freeze stability test is filtered. During the entire rapid post-treatment process, N2 protection is maintained throughout the process, maintaining a pressure of 0.01-0.02 MPa.

[0028] Advantages of the present invention:

[0029] 1) The stem guide mechanism of the present invention is provided with corresponding material guide members at intervals of swinging intervals on the screening support platform. When the material vibrates up and down and passes to the discharge port, the long and irregular stems are easily intercepted by the fence-like material guide members. The fruit particles continue to pass forward and are further vibrated and screened to remove some fine impurities and necrotic fruit directly. At least one stem-pulling mechanism is provided below the stem guide mechanism. The stem-pulling mechanism includes a hollow roller driven to rotate by an electric motor. The surface of the hollow roller is provided with a toggle rod staggered with the fence bars of the material guide member. The rotation of the toggle rod can gradually transfer the stems on the toggle rod to the stem conveyor belt at the top, thereby effectively separating the stems from the fruit particles and transferring them outward. On the basis of the destemming mechanism separating the fruit particles and stems, and the vibrating screening mechanism screening and separating the fine impurities and necrotic fruit, the traditional multi-layer grading guide roller method of separating fruit particles is replaced by the additional stem guide mechanism and the stem-pulling mechanism to remove the stems, effectively solving the problems of insufficient separation of fruit particles and easy jamming of fruit particles between the guide rollers and causing damage.

[0030] 2) Since the rotating stem-pulling mechanism and the stem-guiding mechanism cooperate to separate and transfer the stems, in order to ensure the stem-pulling effect, the length of the toggle rod needs to be extended. However, an overly long toggle rod is easily stuck at the top of the stem-guiding mechanism and cannot operate. Therefore, the present invention further installs the toggle rod in a telescopic manner in the hollow roller, and fixes a corresponding magnet part in the hollow roller, and the spacing and thickness between the magnet part and the inner surface of the hollow roller gradually increase in the clockwise direction. During the rotation of the toggle rod, the iron part installed at the end of the toggle rod is attracted by the magnet part, thereby driving the rotating toggle rod to gradually shrink into the hollow roller. When the toggle rod rotates to the top of the hollow roller, that is, when the toggle rod is at the position with the largest thickness of the magnet part, the toggle rod shrinks to the outer end and disengages from the guide part, thereby effectively avoiding the problem of jamming during the operation of the stem-guiding mechanism and the stem-pulling mechanism, improving the adaptability of the equipment, and ensuring the smooth operation and practical effect of the present invention.

[0031] 3) The present invention further provides an arc-shaped trigger plate fixed downwardly on the material guide member below the support roller. When the toggle lever rotates to the top of the hollow roller, the toggle lever continues to rotate to push the trigger plate, thereby causing the material guide member to swing downward, and a corresponding first elastic member is connected between the fence bar located on the outermost side of the material guide member and the frame. The material guide member swings downward and drives the material guide member to swing up and down under the elastic force of the first elastic member, thereby forming a certain swing amplitude for the downwardly inclined end portion of the material guide member, and cooperating with the vibrating screening support platform to flatten and loosen the material, so that the fruit particles are transferred evenly and in a single layer, so as to promote the improvement of the efficiency and effect of subsequent vibratory screening.

[0032] 4) The present invention uses a telescopic installation of a toggle rod through the cooperation of a second elastic member and a limiting tube, and a corresponding iron member is provided at the end of the toggle rod. Moreover, through the provision of a non-standard magnet member, the toggle rod is gradually attracted by the iron member during rotation and shrinks into the hollow roller to ensure that the toggle rod can be smoothly separated from the material guide member. Furthermore, a corresponding abutment ball is rotatably installed on the iron member. When the iron member is attracted by the magnet member and abuts against the magnet member, the intervention of the abutment ball can effectively reduce the resistance of the toggle rod during the rotation of the hollow roller, thereby further improving the practical effect of the present invention.

[0033] 5) The vibrating screening mechanism of the present invention can be equipped with two front and rear screens. The front screen performs preliminary screening and stem separation before further vibrating and screening to improve screening efficiency and quality, ensuring more comprehensive grape screening and more thorough separation of unusable materials such as diseased, rotten, moldy fruit, and impurities. The screen is removably mounted on the screening support platform for easy cleaning. The welded slats of the screen are trapezoidal, wider at the top and narrower at the bottom, to prevent clogging when small grapes enter the screen. The screening support platform can generate a combined vibration of the vibration motor and eccentric wheel, causing the support platform to vibrate in both vertical and horizontal directions, thereby fully tumbling and dispersing the grapes on the support platform and improving the screening effect. The eccentric wheel is connected to a variable frequency motor, and the motor speed can be adjusted by the inverter to control the frequency and intensity of the vibration, further improving the vibration effect and promoting grape screening. The present invention provides a collection trough below the screen to collect residue and juice, facilitating centralized cleaning. Corresponding ball valves are connected to the side and bottom of the collection trough for draining grape juice and dirty washing water.

[0034] 6) Due to the limitation of the length setting of the toggle rod of the toggle mechanism, the material at the feeding end of the material guide is easily piled up because it cannot be pushed upward by the toggle rod in time. Therefore, the present invention further adds an auxiliary toggle mechanism, which includes a rotating roller whose rotation direction is opposite to the direction of the hollow roller. Multiple rows of toggle rods are installed on the rotating roller. The toggle rods, fence bars and toggle rods are staggered in sequence from left to right, and the toggle rods and the toggle rods are cross-arranged. The transmitted stalks are intercepted and gathered by the fence bars, and the intercepted stalks are pushed upward along the fence bars by the rotating toggle rods. Since the toggle rods are staggered and cross-arranged with the toggle rods, the toggle rods rotate in the opposite direction from the bottom of the toggle rods to receive the stalks on the toggle rods and continue to push them in the direction of the fence bars. Not only can the stalks be continuously transmitted along the direction of the fence bars, but the toggle rods can also effectively receive the stalks on the toggle rods, preventing the stalks from returning to the screening support platform as the toggle rods rotate, further ensuring the practical effect of the present invention.

[0035] 7) The present invention utilizes a grape bunch screening machine to accelerate the efficiency and effect of raw material stem removal and screening to ensure the quality of grape berries, thereby reducing the raw material microbial base, ensuring the sanitary condition of the raw materials, and promoting the subsequent brewing of sulfur-free red wine. In addition, measures such as freezing sleeves, dry ice freeze sterilization, high-pressure sterilization, and high-density CO2 immersion are used to effectively kill microorganisms on the surface of grapes, further reducing the microbial base in the grape juice before fermentation. Adding 20-25g / t pectinase OPTIZYM and immersing for about 6 hours in a high-density CO2 environment not only helps to extract flavor substances, but also further ensures the sanitary condition of the raw materials through the antibacterial effect of CO2, fundamentally solving the problem of SO2 intake. Alcoholic fermentation and lactic fermentation are carried out in sequence. The alcoholic fermentation process adopts 0.1-0.2 MPa sealed fermentation with pressure, and the lactic fermentation adopts 0.01-0.02 MPa sealed fermentation with pressure. After fermentation, the pressure is maintained at 0.01-0.02 MPa pressure, automatic oxygen control ensures normal yeast fermentation, and closed operation is implemented to avoid environmental microbial contamination and effectively prevent oxidation; after fermentation is completed, rapid post-processing of gelling clarification and freeze filtration is performed, using 65-70g / t egg white as the gelling material for gelling clarification, using a scraper-type quick freezer to quickly cool the wine to 1-2°C above the freezing point of the wine for freeze filtration, and filtering the wine after passing the freeze stability test. The entire process of rapid post-processing is protected by N2, maintaining a pressure of 0.01-0.02MPa, which can better preserve the fruity aroma and sensory quality of the wine. During the production process, the present invention replaces the sterilization, anti-oxidation and microbial contamination inhibition functions of SO2 through raw material control, high-pressure sterilization, pressurized fermentation, and closed operation. The full closed pressurized fermentation process, full pressure control and oxygen limitation effectively avoid contamination and oxidation, thereby achieving sulfur-free brewing of high-quality wine. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural schematic diagram of the present invention.

[0037] Figure 2 for Figure 1 Schematic diagram of the structure with some racks removed.

[0038] Figure 3 This is a schematic diagram of the installation structure of the stem-removing mechanism, stem-guiding mechanism, stem-pushing mechanism and auxiliary-pushing mechanism.

[0039] Figure 4 for Figure 3 Schematic side view of .

[0040] Figure 5 for Figure 3 Enlarged schematic diagram of part A.

[0041] In the accompanying drawings: frame 1, stem removing mechanism 2, hopper 201, driving member 202, thumbwheel 203, vibrating screening mechanism 3, screening carrying platform 301, driving assembly 302, screen 303, stem guiding mechanism 4, material guiding member 401, supporting roller 4011, flexible protective cover 4012, fence bar 4013, stem conveyor belt 402, stem removing mechanism 5, hollow roller 501, toggle rod 502, iron member 503, magnet member 504, limiting tube 505, second elastic member 506, abutting ball 507, material receiving mechanism 6, collecting trough 601, material holding frame 602, reset mechanism 7, support plate 701, first elastic member 702, trigger plate 8, auxiliary toggle mechanism 9, rotating roller 901, material removing member 902, material removing rod 9021. DETAILED DESCRIPTION

[0042] In order to facilitate understanding by those skilled in the art, the structure of the present invention is further described in detail with reference to the embodiments and the accompanying drawings:

[0043] Example 1

[0044] refer to Figure 1-5 , a grape bunch screening machine, comprising:

[0045] Rack 1;

[0046] The stem-removing mechanism 2 comprises a hopper 201 mounted on the upper front end of the frame 1, wherein a group of relatively synchronously swinging and fence-shaped driving members 202 and three groups of toggle assemblies connected by corresponding gear meshing are rotatably mounted in the hopper 201, wherein the driving members 202 are driven by corresponding motor-driven cams to rotate and drive the driving members 202 to swing, and the toggle assembly comprises a driving shaft and a plurality of laterally spaced thumbwheels 203 fixedly mounted on the driving shaft, the thumbwheels 203 being staggered with the fence plates on the driving members 202, and the three thumbwheels 203 located at the same position on the driving shaft being arranged to rotate crosswise; the multiple groups of cross thumbwheels 203 in the three toggle assemblies rotate to sequentially receive materials, and a group of driving members 202 pushes the grape berries and stems left and right to separate them;

[0047] a vibrating screening mechanism 3 for screening and removing fine impurities and necrotic fruit, comprising a screening carrying platform 301 movably mounted on the frame 1 below the discharge port of the destemming mechanism 2, and a drive assembly 302 for driving the screening carrying platform 301 to vibrate and screen, and at least one screen 303 detachably fixedly mounted on the screening carrying platform 301;

[0048] The stem guide mechanism 4 comprises a fence-like guide member 401 pivotally mounted on the frame 1 in front of the discharge end of the vibrating screening mechanism 3. The guide member 401 comprises a plurality of fence bars 4013 spaced apart and arranged side by side. The guide member 401 is tilted downwardly, facing away from the direction in which the grape berries are conveyed, and extends to a distance from the upper surface of the screening platform 301. A stem conveyor belt 402 for conveying grape stems outward is disposed below the upwardly tilted end of the guide member 401.

[0049] The stem-pushing mechanism 5 comprises a hollow roller 501 rotatably mounted below the material guide 401, the surface of the hollow roller 501 being telescopically mounted with a toggle rod 502 staggered with the fence bars 4013 on the material guide 401, and the outer end of the toggle rod 502 extending outwardly and inserted into the material guide 401, the inner end of the toggle rod 502 inserting into the hollow roller 501 and fixedly connected with a corresponding iron part 503, a corresponding magnet part 504 being fixedly mounted laterally in the hollow roller 501, the two ends of the magnet part 504 extending outwardly through the hollow roller 501 and fixed on both sides of the frame 1, the spacing and thickness between the magnet part 504 and the inner surface of the hollow roller 501 The rotation of the toggle rod 502 gradually increases in the clockwise direction; when the hollow roller 501 rotates clockwise, the magnetic attraction of the magnet 504 on the iron part 503 causes the toggle rod 502 to gradually retract into the hollow roller 501 and keep the outer end of the toggle rod 502 inserted into the material guide 401; when the toggle rod 502 rotates to the top of the hollow roller 501, that is, when the toggle rod 502 is located at the position where the thickness of the magnet 504 is the largest, the toggle rod 502 retracts to the outer end and disengages from the material guide 401; when the vibrating screening mechanism 3 is actuated, the material is transferred to its discharge port, and the material guide 401 intercepts the stalks on the screening carrying platform 301 and is gradually lifted and transported to the stalk conveyor belt 402 by the circularly rotating toggle rod 502;

[0050] The material holding mechanism 6 includes a collecting trough 601 fixed on the frame 1 below the screen 303 and a material holding frame 602 arranged below the discharge end of the screening carrying platform 301.

[0051] The stem guiding mechanism 4 of the present invention is provided with corresponding material guide members 401 at intervals and swingingly arranged on the screening supporting platform 301. When the material vibrates up and down and is transferred to the discharge port, the long and irregular stems are easily intercepted by the fence-shaped material guide members 401, and the fruit particles continue to be transferred forward and further vibrated to pass through the screening area where some fine impurities and necrotic fruits are directly collected; and a stem removing mechanism 5 is provided below the stem guiding mechanism 4. The stem removing mechanism 5 includes a hollow roller 501 that is driven to rotate by an electric motor. The surface of the hollow roller 501 is retractably provided with a toggle rod 502 that is staggered with the fence bars 4013 of the material guide member 401. The rotation of the toggle rod 502 can gradually transfer the stems on the toggle rod 502 to the stem conveyor belt on the top, thereby effectively separating the stems from the fruit particles and transferring them outward. On the basis of the destemming mechanism 2 separating the fruit particles and stems, and the vibrating screening mechanism 3 screening and separating the fine impurities and necrotic fruits, the additional stem guiding mechanism 4 and the stem removing mechanism 5 cooperate to remove the stems to replace the traditional multi-layer grading guide roller separation method of the fruit particles, effectively solving the problems of insufficient separation of the fruit particles and the fruit particles being easily stuck between the guide rollers and causing damage.

[0052] Since the rotating stem-pulling mechanism 5 cooperates with the stem-guiding mechanism 4 to separate and transfer the stems, in order to ensure the stem-pulling effect, the length of the toggle rod 502 needs to be extended. However, an overly long toggle rod 502 is easily stuck at the top of the stem-guiding mechanism 4 and cannot operate. Therefore, the present invention further installs the toggle rod 502 in a telescopic manner in the hollow roller 501, and fixes a corresponding magnet 504 in the hollow roller 501, and the distance and thickness between the magnet 504 and the inner surface of the hollow roller 501 gradually increase in the clockwise direction. During the rotation of the toggle rod 502, its end is installed The iron part 503 is attracted by the magnet part 504, and the distance and thickness between the magnet part 504 and the inner surface of the hollow roller 501 gradually increase in the clockwise direction, thereby driving the rotating toggle rod 502 to gradually shrink into the hollow roller 501. When the toggle rod 502 rotates to the top of the hollow roller 501, that is, when the toggle rod 502 is located at the position with the largest thickness of the magnet part 504, the toggle rod 502 shrinks to the outer end and disengages from the guide part 401, thereby effectively avoiding the problem of jamming of the guide mechanism 4 and the toggle mechanism 5 during operation, improving the adaptability of the equipment, and ensuring the smooth operation and practical effect of the present invention.

[0053] The material guide member 401 includes a support roller 4011 rotatably mounted on the frame 1, and the fence bars 4013 are fixed to the support roller 4011 at equal intervals and tilted downward. The end of the fence bar 4013 not connected to the support roller 4011 extends downward and is covered with a corresponding flexible protective cover 4012. The distance between the end of the fence bar 4013 covered with the flexible protective cover 4012 and the screening support platform 301 is greater than D1 and less than D2, where D1 is the diameter of the grape berry and D2 is twice the diameter of the grape berry.

[0054] Corresponding reset mechanisms 7 are provided at the upper ends of both sides of the material guide member 401, and the reset mechanism 7 includes a support plate 701 fixed to the frame 1, and a corresponding first elastic member 702 is connected between the support plate 701 and the sidemost fence bar 4013. The first elastic member 702 enables the material guide member 401 to have a movement tendency of swinging up and down.

[0055] An arc-shaped trigger plate 8 is fixed downwardly on the material guide member 401 below the support roller shaft 4011. When the toggle rod 502 rotates to the top of the hollow roller 501, that is, when the toggle rod 502 is located at the position where the thickness of the magnet member 504 is the largest, the distance between the outer end of the toggle rod 502 and the outer surface of the hollow roller 501 is greater than the distance between the trigger plate 8 and the outer surface of the hollow roller 501, that is, the toggle rod 502 pushes the trigger plate 8 when it rotates.

[0056] The present invention further provides an arc-shaped trigger plate 8 fixed downwardly on the material guide member 401 below the support roller 4011. When the toggle rod 502 rotates to the top of the hollow roller 501, the toggle rod 502 continues to rotate to push the trigger plate 8, thereby causing the material guide member 401 to swing downward, and a corresponding first elastic member 702 is connected between the fence bar 4013 located on the outermost side of the material guide member 401 and the frame 1. The material guide member 401 swings downward and drives the material guide member 401 to swing up and down under the elastic force of the first elastic member 702, thereby forming a certain swing amplitude for the downwardly inclined end portion of the material guide member 401, and cooperating with the vibrating screening support platform 301 to flatten and loosen the material, so that the fruit particles are transferred evenly and in a single layer, so as to promote the improvement of the efficiency and effect of subsequent vibration screening.

[0057] A corresponding limiting tube 505 is fixedly installed on the outer surface of the hollow roller 501, and the toggle rod 502 is telescopically installed in the limiting tube 505. The outer side of the toggle rod 502 is located between the iron part 503 and the hollow roller 501 and is sleeved with a corresponding second elastic part 506. The two ends of the second elastic part 506 are respectively fixed to the inner side wall of the hollow roller 501 and the iron part 503. The side of the iron part 503 facing the magnet part 504 is rotatably installed with a corresponding abutting ball 507.

[0058] The present invention can telescopically install the toggle rod 502 through the cooperation of the second elastic member 506 and the limiting tube 505, and the corresponding iron part 503 is set at the end of the toggle rod 502. Moreover, through the setting of the non-standard magnet part 504, the toggle rod 502 is gradually attracted by the iron part 503 during the rotation and shrinks into the hollow roller 501 to ensure that the toggle rod 502 can be smoothly separated from the material guide part 401, and the corresponding abutment ball 507 is rotatably installed on the iron part 503. When the iron part 503 is attracted by the magnet part 504 and abuts against the magnet part 504, the intervention of the abutment ball 507 can effectively reduce the resistance of the toggle rod 502 during the rotation of the hollow roller 501, thereby further improving the practical effect of the present invention.

[0059] An auxiliary material shifting mechanism 9 is provided above the feeding end of the material guide member 401, and the auxiliary material shifting mechanism 9 includes a rotating roller 901 connected to the hollow roller 501 by gear meshing connection, and the rotation direction of the rotating roller 901 is opposite to the rotation direction of the hollow roller 501, and a plurality of material shifting members 902 are fixedly connected at equal intervals on the circumferential surface of the rotating roller 901, and a plurality of material shifting rods 9021 are arranged side by side at equal intervals on the left and right of the material shifting member 902, and the material shifting rods 9021, the fence bars 4013 and the shifting rods 502 are staggered in sequence on the left and right, and the material shifting rods 9021 and the shifting rods 502 are cross-arranged.

[0060] Since there are limitations in the length setting of the toggle rod 502 of the toggle mechanism 5, the material at the feeding end of the material guide 401 is easily accumulated because it cannot be pushed upward by the toggle rod 502 in time. Therefore, the present invention further adds an auxiliary toggle mechanism 9, which includes a rotating roller 901 whose rotation direction is opposite to that of the hollow roller 501. Multiple rows of toggle rods 902 are installed on the rotating roller 901. The toggle rods 902, the fence bars 4013 and the toggle rods 502 are staggered in sequence on the left and right, and the toggle rods 902 and the toggle rods 502 are cross-arranged. The transmitted stalks are intercepted and gathered by the fence bars 4013, and the intercepted stalks are pushed upward along the fence bars 4013 by the rotating material selection rod 902. Since the toggle rod 502 is staggered and cross-arranged with the material selection rod 902, the toggle rod 502 rotates in the opposite direction from the bottom of the material selection rod 902 to receive the stalks on the material selection rod 902 and continue to push them in the direction of the fence bars 4013. Not only can the stalks be continuously transmitted along the direction of the fence bars 4013, but the toggle rod 502 can also effectively receive the stalks on the material selection rod 902, preventing the stalks from returning to the screening support platform 301 as the material selection rod 902 rotates, further ensuring the practical effect of the present invention.

[0061] The screening supporting platform 301 is mounted on the frame 1 via at least four supporting spring columns mounted at its end corners. The driving assembly 302 includes a vibration motor mounted below the screening supporting platform 301 and / or a driving motor fixedly mounted on the frame 1. A corresponding eccentric wheel is fixedly mounted on the output shaft end of the driving motor, and the eccentric wheel abuts against the bottom of the screening supporting platform 301.

[0062] The vibrating screening mechanism 3 of the present invention can be provided with two front and rear screens 303. The front side is preliminarily screened and the stems are separated before further vibrating and screening to improve the efficiency and quality of screening, ensure that the grapes are screened more comprehensively, and that unusable substances such as diseased, rotten, moldy, and impurities can be screened and separated more thoroughly. The screen 303 is movably and detachably mounted on the screening support platform 301 for easy cleaning. The welded slats of the screen are trapezoidal strips that are wide at the top and narrow at the bottom to avoid clogging when small grapes enter the screen. The screening support platform 301 can be vibrated by a combination of a vibration motor and an eccentric wheel. The supporting platform generates composite vibrations in the up-down and left-right directions, thereby allowing the grapes to fully roll and disperse on the supporting platform, thereby improving the screening effect; wherein the eccentric wheel is connected to the variable frequency motor, and the speed of the motor can be adjusted by the inverter to control the frequency and intensity of the vibration, thereby further improving the vibration effect and promoting the screening of the grapes; the present invention is provided with a collection trough 601 below the screen 303, and the collection trough 601 is used to collect residues and juice, and is convenient for centralized cleaning. Corresponding ball valves are connected to the side and bottom of the collection trough 601 for discharging grape juice and dirty water for washing.

[0063] Example 2

[0064] A method for brewing sulfur-free red wine based on the grape bunch screening machine described above comprises the following specific steps:

[0065] S1, screening the incoming material: feeding the harvested raw materials into the grape bunch screening machine, removing the stems, vibrating and screening, and separating the stems and fruits to obtain grape berries; commercially available optical imaging screening technology and equipment can be used to remove moldy, diseased, rotten fruits and impurities to reduce the raw material colony base;

[0066] S2, freezing and high-pressure sterilization: The screened raw materials are frozen in a freezing sleeve, using an axial feeding method, and dry ice-frozen peels are added to the feeding, and then added to the pressurized fermentation tank. After entering the tank, ultra-high pressure sterilization and maceration are performed;

[0067] S3, yeast inoculation, alcohol fermentation: the sterilized raw materials are inoculated with yeast and placed in a fermentation tank to maintain pressure for fermentation;

[0068] S4, malolactic fermentation: after the alcoholic fermentation is completed, lactic acid bacteria are inoculated and malolactic fermentation is carried out under controlled pressure and sealed;

[0069] S5, rapid post-processing: After fermentation, the grape wine is rapidly post-processed under a gas-protected environment. The rapid post-processing includes gelling clarification and freeze filtration.

[0070] S6, Filling: Rapid filling under sterile environment.

[0071] In step S2, during the raw material processing stage, a freezing sleeve and dry ice freezing sterilization technology are used to effectively kill microorganisms on the surface of the grapes. At the same time, high-pressure sterilization technology is combined to further reduce the base number of microorganisms in the grape juice before fermentation. After the ultra-high pressure sterilization is completed, the pressure is released to 0.1-0.2 MPa, followed by high-density CO2 immersion for 5-6 hours, and 20-25g / t pectinase OPTIZYM is added.

[0072] The alcohol fermentation in step S3 is maintained at a pressure of 0.1-0.2 MPa, and the temperature is controlled at 24-28°C during the fermentation process; the malolactic fermentation in step S4 is performed in a closed, normal-pressure fermentation throughout the entire process, and nitrogen is filled into the fermentation tank during transfer, maintaining a pressure of 0.01-0.02 MPa. By controlling the pressure in the fermentation tank, oxygen entry is effectively suppressed, and the oxygen concentration in the fermentation tank is monitored and adjusted in real time to ensure normal fermentation activity of the yeast; after the fermentation is completed, the pressure is maintained at 0.01-0.02 MPa.

[0073] The clarification step S5 uses egg white as the sizing material, with a sizing amount of 65-70 g / t. The freeze filtration process uses a scraper-type quick freezer to rapidly cool the wine to a temperature 1-2°C higher than the freezing point of the wine. The wine that passes the freeze stability test is filtered. During the entire rapid post-treatment process, N2 protection is maintained throughout the process, maintaining a pressure of 0.01-0.02 MPa.

[0074] Before step S1, raw material control is required. By picking leaves and installing an intelligent windmill device, the occurrence of diseases is reduced and the hygienic condition of the raw materials is ensured. Harvesting standards for raw materials with high acidity, high sugar content, and low pH are formulated to better inhibit bacteria. Among them, leaf picking treatment involves removing all leaves below the position of the second bunch of fruit to ensure ventilation and light transmission, thereby reducing the probability of fruit diseases. The intelligent windmill device is automatically controlled according to rainfall or humidity. When the air humidity in the vineyard reaches 75%, the windmill will automatically turn on. On rainy days, the air humidity is high, and when the humidity is above 80%, pathogens such as gray mold and downy mildew germinate and invade the grapes. When the humidity reaches 75%, the windmill will automatically turn on, which can reduce the humidity, thereby reducing the occurrence of diseases and ensuring the hygienic condition of the raw materials. At the same time, the use of pesticides can be reduced and pesticide residues can be reduced.

[0075] The present invention utilizes a grape bunch screening machine to accelerate the efficiency and effect of raw material destemming and screening to ensure the quality of grape berries, thereby reducing the raw material microbial base, ensuring the sanitary condition of the raw materials, and promoting the subsequent brewing of sulfur-free red wine. In addition, measures such as freezing sleeves, dry ice freeze sterilization, high-pressure sterilization, and high-density CO2 immersion are used to effectively kill microorganisms on the surface of grapes, further reducing the microbial base in grape juice before fermentation. 20-25 g / t pectinase OPTIZYM is added and the grape juice is immersed in a high-density CO2 environment for about 6 hours, which not only helps to extract flavor substances, but also further ensures the sanitary condition of the raw materials through the antibacterial effect of CO2, and fundamentally solves the problem of SO2 intake. Alcohol fermentation and flat milk fermentation are carried out in sequence. The alcohol fermentation process adopts 0.1-0.2 MPa pressure-sealed fermentation, and the flat milk fermentation adopts 0.01-0.02 MPa pressure-sealed fermentation. After fermentation, the pressure is maintained at 0.01-0.02. MPa pressure, automatic oxygen control ensures normal yeast fermentation, and closed operation is implemented to avoid environmental microbial contamination and effectively prevent oxidation; after fermentation is completed, rapid post-processing of gelling clarification and freeze filtration is performed, using 65-70g / t egg white as the gelling material for gelling clarification, using a scraper-type quick freezer to quickly cool the wine to 1-2°C above the freezing point of the wine for freeze filtration, and filtering the wine after passing the freeze stability test. The entire process of rapid post-processing is protected by N2, maintaining a pressure of 0.01-0.02MPa, which can better preserve the fruity aroma and sensory quality of the wine. During the production process, the present invention replaces the sterilization, anti-oxidation and microbial contamination inhibition functions of SO2 through raw material control, high-pressure sterilization, pressurized fermentation, and closed operation. The full closed pressurized fermentation process, full pressure control and oxygen limitation effectively avoid contamination and oxidation, thereby achieving sulfur-free brewing of high-quality wine.

[0076] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A grape bunch screening machine, characterized in that: include: Rack (1); The stem-removing mechanism (2) comprises a hopper (201) mounted on the upper front end of the frame (1), a group of relatively synchronously swinging and fence-shaped driving members (202) and three groups of toggle assemblies connected by corresponding gear meshing are rotatably mounted in the hopper (201), the driving member (202) is driven by a corresponding motor to drive the cam to rotate and drive the driving member (202) to swing, the toggle assembly comprises a driving shaft and a plurality of thumbwheels (203) fixedly mounted on the driving shaft at laterally intervals, the thumbwheels (203) and the fence plates on the driving member (202) are staggered, and the three thumbwheels (203) located at the same position on the driving shaft are arranged to rotate crosswise; the multiple groups of cross thumbwheels (203) in the three toggle assemblies rotate to sequentially receive materials and are pushed left and right by a group of driving members (202) to separate the grape berries and stems; a vibrating screening mechanism (3) for screening to remove fine impurities and necrotic fruit, comprising a screening carrying platform (301) movably mounted on a frame (1) located below the discharge port of the destemming mechanism (2), and a driving assembly (302) for driving the screening carrying platform (301) to vibrate and screen, wherein at least one screen (303) is detachably and fixedly mounted on the screening carrying platform (301); a stem guide mechanism (4) comprising a fence-shaped material guide member (401) hingedly and swingably mounted on a frame (1) located in front of the discharge end of the vibrating screening mechanism (3); the material guide member (401) comprising a plurality of fence bars (4013) spaced apart and arranged side by side; the material guide member (401) being tilted downwardly in the direction opposite to the direction in which the grape berries are conveyed, and extending to a distance from the upper surface of the screening support platform (301); and a stem conveyor belt (402) for conveying grape stems outwardly being arranged below one end of the material guide member (401) tilted upwardly; The stem-pushing mechanism (5) comprises a hollow roller (501) rotatably mounted below the material guide (401), the surface of the hollow roller (501) being telescopically mounted with a toggle rod (502) staggered with the fence bars (4013) on the material guide (401), and the outer end of the toggle rod (502) extending outwards and inserted into the material guide (401), the inner end of the toggle rod (502) inserting into the hollow roller (501) and fixedly connected to a corresponding iron member (503), a corresponding magnet member (504) being fixedly mounted transversely in the hollow roller (501), the two ends of the magnet member (504) extending outwards through the hollow roller (501) and fixed on both sides of the frame (1), the spacing and thickness between the magnet member (504) and the inner surface of the hollow roller (501) being equal to or greater than the inner surface of the hollow roller (501). The degree of the magnet (504) gradually increases in the clockwise direction; when the hollow roller (501) rotates clockwise, the magnet (504) exerts a magnetic attraction on the iron part (503), causing the toggle rod (502) to gradually shrink into the hollow roller (501) and keep the outer end of the toggle rod (502) inserted into the material guide (401); when the toggle rod (502) rotates to the top of the hollow roller (501), that is, when the toggle rod (502) is located at the position where the thickness of the magnet (504) is the largest, the toggle rod (502) shrinks to the outer end and separates from the material guide (401); when the vibrating screening mechanism (3) is actuated, the material is transferred to its discharge port, and the material guide (401) intercepts the stalks on the screening carrying platform (301) and gradually lifts the stalks by the cyclically rotating toggle rod (502) and transports them to the stalk conveyor belt (402); The material receiving mechanism (6) comprises a collecting trough (601) fixed on the frame (1) below the screen (303) and a material receiving frame (602) arranged below the discharge end of the screening carrying platform (301).

2. A grape bunch screening machine according to claim 1, characterized in that: The material guide member (401) includes a support roller (4011) rotatably mounted on the frame (1); the fence bars (4013) are fixedly connected to the support roller (4011) at equal intervals in the horizontal direction and tilted downward; one end of the fence bar (4013) not connected to the support roller (4011) extends downward and is covered with a corresponding flexible protective sleeve (4012); the distance between the end of the fence bar (4013) covered with the flexible protective sleeve (4012) and the screening support platform (301) is greater than D1 and less than D2, wherein D1 is the diameter of the grape berry and D2 is twice the diameter of the grape berry.

3. The grape bunch screening machine according to claim 1, characterized in that: Corresponding reset mechanisms (7) are provided at the upper ends of both sides of the material guide member (401), and the reset mechanism (7) comprises a support plate (701) fixed to the frame (1), and a corresponding first elastic member (702) is connected between the support plate (701) and the sidemost fence bar (4013), and the first elastic member (702) enables the material guide member (401) to have a tendency to swing up and down.

4. A grape bunch screening machine according to claim 2, characterized in that: An arc-shaped trigger plate (8) is fixed downwardly on the material guide member (401) below the support roller shaft (4011). When the toggle rod (502) rotates to the top of the hollow roller (501), that is, when the toggle rod (502) is located at the position where the thickness of the magnet member (504) is the largest, the distance between the outer end of the toggle rod (502) and the outer surface of the hollow roller (501) is greater than the distance between the trigger plate (8) and the outer surface of the hollow roller (501), that is, when the toggle rod (502) rotates, it pushes the trigger plate (8).

5. The grape bunch screening machine according to claim 1, characterized in that: A corresponding limiting tube (505) is fixedly mounted on the outer surface of the hollow roller (501); the toggle rod (502) is telescopically inserted and mounted in the limiting tube (505); a corresponding second elastic member (506) is sleeved on the outer side of the toggle rod (502) between the iron member (503) and the hollow roller (501); two ends of the second elastic member (506) are respectively fixed to the inner side wall of the hollow roller (501) and the iron member (503); and a corresponding abutting ball (507) is rotatably mounted on the side of the iron member (503) facing the magnet member (504).

6. The grape bunch screening machine according to claim 1, characterized in that: An auxiliary shifting mechanism (9) for assisting in shifting is provided above the feeding end of the material guide (401), the auxiliary shifting mechanism (9) comprising a rotating roller (901) connected to the hollow roller (501) by means of a gear meshing connection, the rotating roller (901) rotating in a direction opposite to that of the hollow roller (501), a plurality of shifting members (902) being fixedly connected to the circumferential surface of the rotating roller (901) at equal intervals, a plurality of shifting rods (9021) being arranged side by side at equal intervals on the left and right of the material shifting member (902), the shifting rods (9021), the fence bars (40 13) and the toggle rod (502) are alternately arranged on the left and right sides, and the toggle rod (9021) and the toggle rod (502) are cross-arranged; the screening bearing platform (301) is mounted on the frame (1) through at least four supporting spring columns mounted on its end corners, and the driving assembly (302) includes a vibration motor mounted below the screening bearing platform (301) and / or a driving motor fixedly mounted on the frame (1), and a corresponding eccentric wheel is fixedly mounted on the output shaft end of the driving motor, and the eccentric wheel abuts against the bottom of the screening bearing platform (301).

7. A method for brewing sulfur-free red wine based on the grape bunch screening machine according to any one of claims 1 to 6, characterized in that: The following specific steps are included: S1, screening the raw materials: feeding the harvested raw materials into the grape cluster screening machine, removing the stems, vibrating and screening, and separating the stems and fruits to obtain grape berries; S2, freezing and high-pressure sterilization: The screened raw materials are frozen in a freezing sleeve, using an axial feeding method, and dry ice-frozen peels are added to the feeding. Then, they are added to the pressurized fermentation tank, and after entering the tank, they are sterilized by ultra-high pressure and immersed in a high-density CO2 environment; S3, yeast inoculation, alcohol fermentation: the sterilized raw materials are inoculated with yeast and placed in a fermentation tank under pressure and sealed for fermentation; S4, malolactic fermentation: after the alcoholic fermentation is completed, lactic acid bacteria are inoculated and malolactic fermentation is carried out under sealed pressure; S5, rapid post-processing: After fermentation, the grape wine is rapidly post-processed under a gas-protected environment. The rapid post-processing includes gelling clarification and freeze filtration. S6, Filling: Rapid filling under sterile environment.

8. The method for brewing sulfur-free red wine according to claim 7, characterized in that: In step S2, during the raw material processing stage, a freezing sleeve and dry ice freezing sterilization technology are used to effectively kill microorganisms on the surface of the grapes. At the same time, high-pressure sterilization technology is combined to further reduce the base number of microorganisms in the grape juice before fermentation. After the ultra-high pressure sterilization is completed, the pressure is released to 0.1-0.2 MPa, followed by high-density CO2 immersion for 5-6 hours, and 20-25g / t pectinase OPTIZYM is added.

9. The method for brewing sulfur-free red wine according to claim 7, characterized in that: The alcohol fermentation in step S3 is maintained at a pressure of 0.1-0.2 MPa, and the temperature is controlled at 24-28°C during the fermentation process; the malolactic fermentation in step S4 is performed in a closed, normal-pressure fermentation throughout the entire process, and nitrogen is filled into the fermentation tank during transfer, maintaining a pressure of 0.01-0.02 MPa. By controlling the pressure in the fermentation tank, oxygen entry is effectively suppressed, and the oxygen concentration in the fermentation tank is monitored and adjusted in real time to ensure normal fermentation activity of the yeast; after the fermentation is completed, the pressure is maintained at 0.01-0.02 MPa.

10. The method for brewing sulfur-free red wine according to claim 7, characterized in that: The clarification step S5 uses egg white as the sizing material, with a sizing amount of 65-70 g / t. The freeze filtration process uses a scraper-type quick freezer to rapidly cool the wine to a temperature 1-2°C higher than the freezing point of the wine. The wine that passes the freeze stability test is filtered. During the entire rapid post-treatment process, N2 protection is maintained throughout the process, maintaining a pressure of 0.01-0.02 MPa.

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