Hemerocallis fulva oolong tea and preparation method thereof

Abstract

The preparation method comprises the following specific preparation process steps: step S1, weighing raw materials: selecting fresh tea leaves suitable for preparing oolong tea, preferably selecting one bud with two leaves or one bud with three leaves, and requiring that the fresh leaves are fresh, free of plant diseases and insect pests and free of impurities; the method comprises the following steps: selecting fresh and mildew-free hemerocallis fulva, cleaning, and draining to avoid influence of excessive water on tea fermentation; according to flavor requirements, the ratio of the yellow flowers to the tea leaves (generally, the yellow flowers account for 5%-15%) is determined. The output end of the air cylinder shrinks to drive the transverse frame block to move downwards through the connecting block, then through transmission of the first connecting rod and the connecting rod, the two leaf containing frame nets are turned over outwards with the hinged position as the circle center, the two leaf containing frame nets are turned over to be in an inward inclined shape, and a gap is formed between the two leaf containing frame nets. Therefore, the tea leaves on the surface of the leaf containing frame net can slide towards the vacancy and directly fall into the green leaf rocking cylinder; therefore, the effect of feeding the tea leaves into the green leaf rocking device after the tea leaves are withered is achieved, and loss of the withered tea leaves is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of yellow flower oolong tea, in particular to yellow flower oolong tea and a preparation method thereof. Background Art

[0002] Oolong tea originated in Fujian and boasts a history of over a thousand years. Its origins and development can be traced back to Beiyuan Tea, the area surrounding Fenghuang Mountain in Jian'ou, Fujian. Tea production began in the late Tang Dynasty, with the production of "Grinding Paste Tea." During the reign of Emperor Taizong of Song, Longfeng Tea was produced. After Emperor Zhenzong of Song, small-ball tea was transformed into Longtuan Fengbing. At the time, the harvested raw materials, due to accumulation, partially turned red, essentially becoming semi-fermented, and thus the forerunner of oolong tea. Tea may have been present in Wuyi Mountain during the Tang Dynasty or even earlier. During the Yuan Dynasty, an "Imperial Tea Garden" was established at the Four Bends of Wuyi Mountain. During the Ming Dynasty, Longtuan tea production was discontinued and loose tea production was adopted. Wuyi tea replaced Beiyuan tea, and the processing techniques were modified to become loose tea. In the early Qing Dynasty, the Quanzhou and Zhangzhou people's love of tea brewing spurred a vibrant Wuyi tea market. The opening of the Five Ports to trade further fueled the export of large quantities of Wuyi tea.

[0003] In traditional tea production, withering and shaking are separate processes that require manual or simple conveying equipment to transport tea leaves. Specifically, after the fresh leaves are processed by withering equipment (such as withering troughs and withering curtains) to a moisture content of 60%-65%, they are manually scooped or transferred to the shaking drum via a conveyor belt. This process has the following problems:

[0004] Process interruptions lead to quality fluctuations: If the withered tea leaves are transported for too long, they are easily affected by the external environment. In a high-temperature, low-humidity environment, the surface moisture of the tea leaves is quickly lost, causing the leaves to become brittle and easily broken during subsequent shaking. In a high-humidity environment, the tea leaves may become partially moldy due to moisture regain, destroying the stability of oxidase activity and ultimately affecting the uniformity of fermentation. In addition, manual intervention is inefficient and causes high losses: During manual transportation, the tea leaves need to be dumped and stacked many times, which is not only labor-intensive but may also cause leaf damage due to improper operation. Damaged tea leaves will be over-oxidized in advance during the shaking stage, resulting in a bitter taste and mixed aroma. Therefore, the present inventors provide a yellow flower oolong tea and a preparation method thereof to solve the problems raised in the above-mentioned background technology. Summary of the Invention

[0005] The object of the present invention is to provide a yellow flower oolong tea and a preparation method thereof, so as to achieve the effect of feeding the tea leaves into a shaking device after withering, thereby preventing the loss of the tea leaves after withering.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A method for preparing yellow flower oolong tea, the specific preparation process steps are as follows:

[0008] Step S1: Weighing raw materials: Select fresh tea leaves suitable for making oolong tea, preferably one bud and two leaves or one bud and three leaves, which should be fresh, free of pests and diseases, and free of impurities; select fresh, mold-free chrysanthemum flowers, wash them, and drain them to avoid excessive moisture that affects tea fermentation; determine the ratio of chrysanthemum flowers to tea leaves based on flavor requirements (usually chrysanthemum flowers account for 5%-15%);

[0009] Step S2: withering the tea leaves: withering the oolong tea leaves through a withering device;

[0010] Step S3: Shaking treatment: Shaking the withered oolong tea leaves and the treated yellow flowers through a shaking device;

[0011] Step S4: rolling treatment: Place the shaken tea leaves and chrysanthemum flowers into a rolling machine and set appropriate pressure (light → medium → heavy) to break the tea leaves' cells, allowing the tea juice to seep out and adhere to the leaf surface, while promoting the fusion of the chrysanthemum flower's flavor substances with the tea leaves;

[0012] Step S5: Fermentation: Spread the rolled tea leaves and yellow flowers on a fermentation rack to a thickness of about 10-15 cm. Control the ambient temperature at 25-30°C and the humidity at 80%-90%. Stir the tea leaves regularly during the fermentation process to ensure uniform fermentation. The degree of fermentation is determined by observing the color change of the tea leaves.

[0013] Step S6: Drying: The fermented tea leaves are placed in a dryer at a temperature of 80-100°C, spread to a thickness of about 3-5 cm, and dried until the moisture content of the tea leaves drops to 30%-40% (the tea leaves are tough and not sticky when squeezed by hand). During this period, the tea leaves are turned 2-3 times to avoid local overheating. The dried yellow flower oolong tea leaves are sieved to obtain the finished yellow flower oolong tea leaves;

[0014] The withering device in the above step S2 includes a main support, an operating port is provided on the right side of the main support, a withering mechanism is provided inside the main support, the withering mechanism includes a connecting frame, the front and rear sides of the connecting frame are hinged with a flip frame respectively through hinges, the inner side of the flip frame is fixedly connected to a leaf-containing frame net; the left side of the connecting frame is provided with a cross frame block that can move up and down relative to the connecting frame, the bottom of the cross frame block is hinged with a connecting rod 1 through a hinge, the bottom of the connecting rod 1 is rotatably connected to a connecting rod, and the right end of the connecting rod is rotatably connected to the corresponding flip frame. As a further solution of the present invention:

[0015] As a further solution of the present invention: the left rear end of the flip frame is fixedly connected to an L-shaped block, the L-shaped block includes a vertical block and a horizontal block connected vertically, the top of the horizontal block is fixedly connected to a cylinder, the output end of the cylinder is fixedly connected to a connecting block, and the front side of the connecting block is fixedly connected to the horizontal frame block.

[0016] As a further solution of the present invention: movable grooves are respectively opened on the front and rear sides inside the main bracket, and the left and right sides inside the movable groove are rotatably connected with threaded rods, and the outer sides of the two threaded rods are respectively threadedly connected with movable blocks, and the inner sides of the two movable blocks are fixedly connected to the connecting frame; the left end of the threaded rod passes through the left side of the main bracket and the outer left end of the threaded rod is fixedly connected to a synchronous pulley 1, and the outer ends of the two synchronous pulleys are jointly engaged with a transmission belt 1; the left side of the main bracket is fixedly connected to a motor 1 through a mounting frame, and the output end of the motor 1 is fixedly connected to the front threaded rod.

[0017] As a further solution of the present invention: a trough body is opened on the left side of the main bracket, a support plate is fixedly connected to the left side of the trough body, a blower is fixedly connected to the top of the support plate, an air outlet pipe is fixedly connected to the outer side of the air outlet end of the blower, and the right end of the air outlet pipe is upwardly inclined corresponding to the bottom of the leaf frame net; a hot air generator is fixedly connected to the left side of the top of the support plate.

[0018] As a further solution of the present invention: a leaf-turning mechanism is provided on the top of the connecting frame, and the leaf-turning mechanism includes a parallel frame, a group of laterally arranged rotating rods are rotatably connected between the front and rear sides of the parallel frame, a group of rake blocks are fixedly connected to the outer sides of the rotating rods, the front sides of a group of rotating rods pass through the parallel frame and the outer front ends of the rotating rods are respectively fixedly connected to two synchronous pulleys, and the outer sides of a group of two synchronous pulleys are jointly engaged with two transmission belts; the front side of the parallel frame is fixedly connected to motor two through a mounting frame, and the output end of motor two is fixedly connected to the end of the left rotating rod.

[0019] As a further solution of the present invention: a small gear is fixedly connected to the outer side of the rotating rod on the right side, a large gear is meshed on the right side of the small gear, a driving rod that passes through the large gear is fixedly connected to the front center of the large gear, the rear side of the driving rod is rotatably connected to the parallel frame, the front side of the driving rod is rotatably connected to the driving block, the other side of the driving block is hinged to a flip rod through a hinge, the other end of the flip rod is rotatably connected to a fixed rod, the rear side of the fixed rod is fixedly connected to the connecting frame; guide rails are fixedly connected to the tops of the front and rear sides of the connecting frame, and the guide rails are slidably connected to the parallel frame.

[0020] As a further solution of the present invention: a shaking mechanism is provided at the bottom inner side of the main bracket, and the shaking mechanism includes a shaking cylinder provided inside the main bracket, and the left and right sides of the shaking cylinder are rotatably connected to the inner wall of the main bracket through a rotating shaft respectively, and a group of convex ridges arranged in a circle are fixedly connected to the inside of the shaking cylinder, and an arc-shaped flip cover is provided on the top of the shaking cylinder, and a locking part is provided on the flip cover; a collection box is provided at the bottom of the shaking cylinder, and the left side of the main bracket is fixedly connected to motor three through a mounting frame, and the output end of motor three is fixedly connected to the left rotating shaft.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] In the preparation method of yellow flower oolong tea, the output end of the cylinder contracts and drives the cross frame block to move downward through the connecting block, and then the two leaf-containing frame nets are turned outward with the hinge as the center of the circle through the transmission of the connecting rod 1 and the connecting rod. The two leaf-containing frame nets are turned inward and inclined, and there is a gap between the two leaf-containing frame nets, so that the tea leaves on the surface of the leaf-containing frame nets slide toward the gap and directly fall into the interior of the green-shaking cylinder; thereby achieving the effect of feeding the tea leaves into the green-shaking device after withering, and preventing the loss of tea leaves after withering.

[0023] In addition, in the preparation method of yellow flower oolong tea, during the withering process of oolong tea, the tea leaves on the surface of the leaf-containing frame need to be turned over at regular intervals. At this time, the second motor needs to be used intermittently. When the second motor is used, the output end of the second motor drives the left rotating rod and the corresponding second synchronous pulley to rotate, and then as the second synchronous pulley and the second transmission belt rotate, the first group of rotating rods rotate synchronously, and the multiple groups of leaf raking blocks rotate slowly with the rotating rods, driving the tea leaves to be turned over, thereby achieving the effect of turning the oolong tea leaves over. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The figure is a schematic diagram of the overall structure of a method for preparing yellow flower oolong tea;

[0025] Figure 2 A schematic diagram of the overall structure from another perspective in a method for preparing yellow flower oolong tea;

[0026] Figure 3 This is a schematic diagram of the cross-sectional structure of a main support in a method for preparing yellow flower oolong tea;

[0027] Figure 4 This is a structural schematic diagram of another perspective of the main support cross section in a method for preparing yellow flower oolong tea;

[0028] Figure 5 This is a schematic diagram of the withering mechanism structure in a method for preparing yellow flower oolong tea;

[0029] Figure 6This is a structural schematic diagram of the withering mechanism in a preparation method of yellow flower oolong tea from another perspective.

[0030] Figure 7 The diagram is a cross-sectional structural diagram of a leaf-turning mechanism in a method for preparing yellow flower oolong tea.

[0031] In the figure: 10, main support; 11, operation port; 20, withering mechanism; 201, moving groove; 202, threaded rod; 203, moving block; 204, motor 1; 205, transmission belt 1; 206, synchronous pulley 1; 207, connecting frame; 208, turning frame; 209, leaf frame net; 210, L-shaped block; 211, cylinder; 212, connecting block; 213, cross frame block; 214, connecting rod 1; 215, connecting rod; 216, support plate; 217, hot steam generator; 218, drum Fan; 219, air outlet duct; 30, leaf-turning mechanism; 301, parallel frame; 302, guide rail; 303, rotating rod; 304, leaf-raking block; 305, motor 2; 306, transmission belt 2; 307, synchronous pulley 2; 308, small gear; 309, large gear; 310, driving rod; 311, fixing rod; 312, turning rod; 313, driving block; 40, shaking mechanism; 401, shaking cylinder; 402, motor 3; 403, turning cover; 404, ridge; 405, collection box. DETAILED DESCRIPTION

[0032] like Figure 1-7 As shown, a method for preparing yellow flower oolong tea, the specific preparation process steps are as follows:

[0033] Step S1: Weighing raw materials: Select fresh tea leaves suitable for making oolong tea, preferably one bud and two leaves or one bud and three leaves, which should be fresh, free of pests and diseases, and free of impurities; select fresh, mold-free chrysanthemums, wash and drain the water to avoid introducing too much water that affects the fermentation of the tea leaves; determine the ratio of chrysanthemums to tea leaves according to the flavor requirements (usually chrysanthemums account for 5%-15%).

[0034] Step S2: Tea leaf withering: The oolong tea leaves are withered using a withering device.

[0035] Step S3: Shaking treatment: Shaking the withered oolong tea leaves and the treated yellow flowers through a shaking device;

[0036] Step S4: rolling treatment: Place the shaken tea leaves and chrysanthemum flowers into a rolling machine and set appropriate pressure (light → medium → heavy) to break the tea leaves' cells, allowing the tea juice to seep out and adhere to the leaf surface, while promoting the fusion of the chrysanthemum flower's flavor substances with the tea leaves;

[0037] Step S5: Fermentation: Spread the rolled tea leaves and yellow flowers on a fermentation rack to a thickness of approximately 10-15 cm. Maintain an ambient temperature of 25-30°C and a humidity of 80%-90%. Stir the tea leaves regularly during fermentation to ensure uniform fermentation. The degree of fermentation can be determined by observing the color change of the tea leaves.

[0038] Step S6: Drying: The fermented tea leaves are placed in a dryer, the temperature is controlled at 80-100° C., the thickness is about 3-5 cm, and the tea leaves are dried until the moisture content of the tea leaves is reduced to 30%-40% (the tea leaves are tough and not sticky when squeezed by hand). During the drying process, the tea leaves are turned 2-3 times to avoid local overheating. The dried yellow flower oolong tea leaves are sieved to obtain the finished yellow flower oolong tea leaves.

[0039] refer to Figure 1-6 The withering device in the above step 2 includes a main bracket 10, an operating port 11 is opened on the right side of the main bracket 10, a withering mechanism 20 is arranged inside the main bracket 10, and the withering mechanism 20 includes a connecting frame 207, and the front and rear sides of the interior of the connecting frame 207 are respectively hinged with a flip frame 208 through a hinge, and the inner side of the flip frame 208 is fixedly connected to a leaf-containing frame net 209; the left side of the connecting frame 207 is provided with a cross frame block 213 that can move up and down relative to the connecting frame 207, the bottom of the cross frame block 213 is hinged with a connecting rod 214 through a hinge, the bottom of the connecting rod 214 is rotatably connected to a connecting rod 215, and the right end of the connecting rod 215 is rotatably connected to the corresponding flip frame 208.

[0040] Specifically, the left rear end of the flip frame 208 is fixedly connected to an L-shaped block 210, and the L-shaped block 210 includes a vertical block and a horizontal block vertically connected. The top of the horizontal block is fixedly connected to a cylinder 211, and the output end of the cylinder 211 is fixedly connected to a connecting block 212, and the front side of the connecting block 212 is fixedly connected to the horizontal frame block 213.

[0041] Furthermore, movable grooves 201 are respectively provided on the front and rear sides of the interior of the main bracket 10, and the left and right sides of the interior of the movable groove 201 are rotatably connected with threaded rods 202. The outer sides of the two threaded rods 202 are respectively threadedly connected with movable blocks 203, and the inner sides of the two movable blocks 203 are fixedly connected to the connecting frame 207; the left end of the threaded rod 202 passes through the left side of the main bracket 10 and the outer left end of the threaded rod 202 is fixedly connected to a synchronous pulley 206, and the outer ends of the two synchronous pulleys 206 are jointly engaged with a transmission belt 205; the left side of the main bracket 10 is fixedly connected to a motor 204 through a mounting frame, and the output end of the motor 204 is fixedly connected to the front threaded rod 202.

[0042] During use, the motor 204 is started by an external power supply, and the output end of the motor 204 drives the front threaded rod 202 and the synchronous pulley 206 to rotate, and the two threaded rods 202 are rotated synchronously through the transmission of the synchronous pulley 206 and the transmission belt 205, thereby driving the two moving blocks 203 to move to the right, until the moving block 203 moves to the right boundary of the moving groove 201, so that the connecting frame 207 is completely moved out of the main bracket 10 through the operating port 11, and then the staff evenly spreads the screened oolong tea on the top of the two leaf-filling frame nets 209, and then reverses the output end of the motor 204, so that the moving block 203 and the connecting frame 207 move to the left, until the connecting frame 207 and the leaf-filling frame net 209 move back to their original position.

[0043] Furthermore, a trough is provided on the left side of the main bracket 10, and a support plate 216 is fixedly connected to the left side of the trough, and a blower 218 is fixedly connected to the top of the support plate 216. An air outlet pipe 219 is fixedly connected to the outer side of the air outlet end of the blower 218, and the right end of the air outlet pipe 219 is upwardly inclined corresponding to the bottom of the leaf frame net 209; a hot air generator 217 is fixedly connected to the left side of the top of the support plate 216.

[0044] When in use, the blower 218 and the hot air generator 217 are started by an external power supply. The hot air after passing through the hot air generator 217 is blown into the air inlet end of the blower 218, and then blown to the bottom surface of the leaf frame 209 through the air outlet pipe 219, thereby achieving the effect of withering the oolong tea leaves.

[0045] refer to Figure 4-7 , a leaf-turning mechanism 30 is provided on the top of the connecting frame 207, and the leaf-turning mechanism 30 includes a parallel frame 301, and a group of laterally arranged rotating rods 303 are rotatably connected between the front and rear sides of the parallel frame 301, and a group of rake blocks 304 are fixedly connected to the outer sides of a group of rotating rods 303, and the front sides of a group of rotating rods 303 pass through the parallel frame 301 and the outer front ends of the rotating rods 303 are respectively fixedly connected to synchronous pulleys 2 307, and the outer sides of a group of synchronous pulleys 2 307 are jointly engaged with transmission belts 2 306; the front side of the parallel frame 301 is fixedly connected to motor 2 305 through a mounting frame, and the output end of motor 2 305 is fixedly connected to the end of the left rotating rod 303.

[0046] During the withering process of oolong tea, the tea leaves on the surface of the leaf-containing frame net 209 need to be turned over at regular intervals. At this time, the motor 2 305 needs to be used intermittently. When the motor 2 305 is used, the output end of the motor 2 305 drives the left rotating rod 303 and the corresponding synchronous pulley 2 307 to rotate, and then as the group of synchronous pulleys 307 and the transmission belt 2 306 rotate, the group of rotating rods 303 rotate synchronously, and the multiple groups of leaf raking blocks 304 rotate slowly with the rotating rods 303, driving the tea leaves to turn over, thereby achieving the effect of turning the oolong tea leaves over.

[0047] Furthermore, a small gear 308 is fixedly connected to the outer side of the rotating rod 303 on the right side, and a large gear 309 is meshed on the right side of the small gear 308. A driving rod 310 that passes through the large gear 309 is fixedly connected to the front center of the large gear 309. The rear side of the driving rod 310 is rotatably connected to the parallel frame 301, and the front side of the driving rod 310 is rotatably connected to a driving block 313. The other side of the driving block 313 is hinged to a flip rod 312 through a hinge. The other end of the flip rod 312 is rotatably connected to a fixed rod 311, and the rear side of the fixed rod 311 is fixedly connected to the connecting frame 207; the front and rear tops of the connecting frame 207 are respectively fixedly connected to guide rails 302, and the guide rails 302 are slidably connected to the parallel frame 301.

[0048] When the output end of motor 2 305 rotates clockwise, it drives a group of rotating rods 303 to rotate in the same direction, and the driving rod 310 is slowly rotated counterclockwise through the transmission of the small gear 308 and the large gear 309, and the driving block 313 is rotated with the driving rod 310 as the axis, thereby driving the flip rod 312 to flip accordingly; since the fixed rod 311 is connected to the connecting frame 207, its position is fixed, and initially the flip rod 312 and the driving block 313 are coincident in position, so that the parallel frame 301 is closest to the right side of the connecting frame 207. When the driving rod 310 rotates counterclockwise, the angle between the flip rod 312 and the driving block 313 becomes closer and closer (when the parallel frame 301 is closer to the connecting frame after half a circle of flipping). The distance to the right of 207 is the largest), and at the same time, the parallel frame 301 will move to the left along the guide rail 302 to fit the movement trajectory of the driving block 313 and the flipping rod 312, thereby allowing the rotating rod 303 and the raking block 304 to flip and move to the left at the same time; and when the driving rod 310 rotates half a circle, the angle between the flipping rod 312 and the driving block 313 gradually becomes smaller, causing the parallel frame 301 to move right and return directly to its original position. The rotation of the driving rod 310 will cause the parallel frame 301 to move back and forth slowly left and right, and while moving, the oolong tea leaves on the surface of the leaf frame net 209 are turned over by the raking block 304, thereby achieving the effect of increasing the raking range of the raking block 304.

[0049] refer to Figure 1-4A shaking mechanism 40 is provided at the bottom inner side of the main bracket 10, and the shaking mechanism 40 includes a shaking tube 401 provided inside the main bracket 10, and the left and right sides of the shaking tube 401 are rotatably connected to the inner wall of the main bracket 10 through a rotating shaft respectively, and a group of convex ridges 404 arranged in a circle are fixedly connected to the inside of the shaking tube 401, and an arc-shaped flip cover 403 is provided on the top of the shaking tube 401, and a locking piece is provided on the flip cover 403; a collecting box 405 is provided at the bottom of the shaking tube 401, and a motor three 402 is fixedly connected to the left side of the main bracket 10 through a mounting frame, and the output end of the motor three 402 is fixedly connected to the left rotating shaft.

[0050] After the oolong tea leaves wither, the cylinder 211 is started by an external power supply, and the output end of the cylinder 211 contracts and drives the cross frame block 213 to move downward through the connecting block 212, and then the two leaf-containing frame nets 209 are turned outward with the hinge as the center of the circle through the transmission of the connecting rod 214 and the connecting rod 215. The two leaf-containing frame nets 209 are turned inward and there is a gap between the two leaf-containing frame nets 209, so that the tea leaves on the surface of the leaf-containing frame nets 209 will slide towards the gap. The tea leaves fall directly into the shaking cylinder 401. Once the tea leaves have completely entered the shaking cylinder 401, the operator closes the flip cover 403 through the operating port 11 and secures it to the shaking cylinder 401 using a locking mechanism. Then, an external power source is used to activate motor 3 402. The output of motor 3 402 slowly rotates the shaking cylinder 401, causing the oolong tea leaves to rotate with the cylinder to a certain height before falling. There, they lightly collide with the cylinder wall and other tea leaves, damaging the leaf margin cells first while leaving the mesophyll cells intact. The raised ridges 404 on the cylinder wall act as a "steering wheel" during this stage, preventing the tea leaves from accumulating at the bottom. This effectively shakes the oolong tea leaves.

[0051] The yellow flower oolong tea is prepared by mixing yellow flowers and oolong tea. The content of the yellow flowers is 5%-15%, and the content of the oolong tea is 95%-85%.

[0052] The working principle of the present invention is: the cylinder 211 is started by an external power supply, and the output end of the cylinder 211 contracts to drive the cross frame block 213 to move downward through the connecting block 212, and then through the transmission of the connecting rod 214 and the connecting rod 215, the two leaf-containing frame nets 209 are flipped outward with the hinge as the center of the circle, and the two leaf-containing frame nets 209 are flipped inward and there is a gap between the two leaf-containing frame nets 209, so that the tea leaves on the surface of the leaf-containing frame nets 209 will slide to the gap and directly fall into the interior of the shaking tube 401; thereby achieving the effect of automatically entering the next process after the oolong tea leaves are withered.

[0053] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. A method for preparing yellow flower oolong tea, characterized in that: The specific preparation process steps are as follows: Step S1: Weighing raw materials: Select fresh tea leaves suitable for making oolong tea, preferably one bud and two leaves or one bud and three leaves, which should be fresh, free of pests and diseases, and free of impurities; select fresh, mold-free chrysanthemum flowers, wash them, and drain them to avoid excessive moisture that affects tea fermentation; determine the ratio of chrysanthemum flowers to tea leaves based on flavor requirements (usually chrysanthemum flowers account for 5%-15%); Step S2: withering the tea leaves: withering the oolong tea leaves through a withering device; Step S3: Shaking treatment: Shaking the withered oolong tea leaves and the treated yellow flowers through a shaking device; Step S4: rolling treatment: Place the shaken tea leaves and chrysanthemum flowers into a rolling machine and set appropriate pressure (light → medium → heavy) to break the tea leaves' cells, allowing the tea juice to seep out and adhere to the leaf surface, while promoting the fusion of the chrysanthemum flower's flavor substances with the tea leaves; Step S5: Fermentation: Spread the rolled tea leaves and yellow flowers on a fermentation rack to a thickness of about 10-15 cm. Control the ambient temperature at 25-30°C and the humidity at 80%-90%. Stir the tea leaves regularly during the fermentation process to ensure uniform fermentation. The degree of fermentation is determined by observing the color change of the tea leaves. Step S6: Drying: The fermented tea leaves are placed in a dryer at a temperature of 80-100°C, spread to a thickness of about 3-5 cm, and dried until the moisture content of the tea leaves drops to 30%-40% (the tea leaves are tough and not sticky when squeezed by hand). During this period, the tea leaves are turned 2-3 times to avoid local overheating. The dried yellow flower oolong tea leaves are sieved to obtain the finished yellow flower oolong tea leaves; The withering device in the above step S2 includes a main support (10), an operating port (11) is provided on the right side of the main support (10), a withering mechanism (20) is arranged inside the main support (10), and the withering mechanism (20) includes a connecting frame (207), the front and rear sides of the interior of the connecting frame (207) are hinged with a flip frame (208) respectively through a hinge, and the inner side of the flip frame (208) is fixedly connected with a leaf-containing frame net (209); the left side of the connecting frame (207) is provided with a cross frame block (213) that can move up and down relative to the connecting frame (207), the bottom of the cross frame block (213) is hinged with a connecting rod (214) through a hinge, the bottom of the connecting rod (214) is rotatably connected to a connecting rod (215), and the right end of the connecting rod (215) is rotatably connected to the corresponding flip frame (208).

2. The method for preparing yellow flower oolong tea according to claim 1, wherein: An L-shaped block (210) is fixedly connected to the rear end of the left side of the flip frame (208), and the L-shaped block (210) includes a vertical block and a horizontal block connected vertically. The top of the horizontal block is fixedly connected to a cylinder (211), and the output end of the cylinder (211) is fixedly connected to a connecting block (212). The front side of the connecting block (212) is fixedly connected to a horizontal frame block (213).

3. The method for preparing yellow flower oolong tea according to claim 1, wherein: The main bracket (10) is provided with a movable groove (201) on both the front and rear sides of the interior, and the left and right sides of the interior of the movable groove (201) are connected to a threaded rod (202) in a common rotation manner. The outer sides of the two threaded rods (202) are respectively threadedly connected to a movable block (203), and the inner sides of the two movable blocks (203) are fixedly connected to a connecting frame (207); the left end of the threaded rod (202) passes through the left side of the main bracket (10) and the outer left end of the threaded rod (202) is fixedly connected to a synchronous pulley (206), and the outer ends of the two synchronous pulleys (206) are jointly engaged with a transmission belt (205); the left side of the main bracket (10) is fixedly connected to a motor (204) through a mounting frame, and the output end of the motor (204) is fixedly connected to the front threaded rod (202).

4. The method for preparing yellow flower oolong tea according to claim 1, wherein: A trough body is provided on the left side of the main bracket (10), a support plate (216) is fixedly connected to the left side of the trough body, a blower (218) is fixedly connected to the top of the support plate (216), an air outlet pipe (219) is fixedly connected to the outside of the air outlet end of the blower (218), and the right end of the air outlet pipe (219) is upwardly inclined and corresponds to the bottom of the leaf frame (209); a hot air generator (217) is fixedly connected to the left side of the top of the support plate (216).

5. The method for preparing yellow flower oolong tea according to claim 1, wherein: A leaf-turning mechanism (30) is provided on the top of the connecting frame (207), and the leaf-turning mechanism (30) comprises a parallel frame (301), a group of transversely arranged rotating rods (303) are rotatably connected between the front and rear sides of the interior of the parallel frame (301), a group of leaf-raking blocks (304) are fixedly connected to the outer sides of a group of rotating rods (303), the front sides of a group of rotating rods (303) pass through the parallel frame (301), and the outer front ends of the rotating rods (303) are respectively fixedly connected to synchronous pulleys (307), and the outer sides of a group of synchronous pulleys (307) are jointly engaged with transmission belts (306); the front side of the parallel frame (301) is fixedly connected to motor (305) through a mounting frame, and the output end of motor (305) is fixedly connected to the end of the left rotating rod (303).

6. The method for preparing yellow flower oolong tea according to claim 5, characterized in that: The outer side of the right rotating rod (303) is fixedly connected with a small gear (308), and the right side of the small gear (308) is meshed with a large gear (309). The center of the front of the large gear (309) is fixedly connected with a driving rod (310) that passes through the large gear (309). The rear side of the driving rod (310) is rotatably connected to the parallel frame (301). The front side of the driving rod (310) is rotatably connected to a driving block (313). The other side of the driving block (313) is hingedly connected to a flip rod (312) through a hinge. The other end of the flip rod (312) is rotatably connected to a fixed rod (311). The rear side of the fixed rod (311) is fixedly connected to the connecting frame (207); the tops of the front and rear sides of the connecting frame (207) are respectively fixedly connected with guide rails (302), and the guide rails (302) are slidably connected to the parallel frame (301).

7. The method for preparing yellow flower oolong tea according to claim 1, characterized in that: A green tea shaking mechanism (40) is provided at the bottom inner side of the main bracket (10), and the green tea shaking mechanism (40) includes a green tea shaking cylinder (401) provided inside the main bracket (10), and the left and right sides of the green tea shaking cylinder (401) are rotatably connected to the inner wall of the main bracket (10) through a rotating shaft respectively. A group of convex ridges (404) arranged in a circular pattern are fixedly connected inside the green tea shaking cylinder (401), and an arc-shaped flip cover (403) is provided on the top of the green tea shaking cylinder (401), and a locking member is provided on the flip cover (403); a collecting box (405) is provided at the bottom of the green tea shaking cylinder (401), and a motor three (402) is fixedly connected to the left side of the main bracket (10) through a mounting frame, and the output end of the motor three (402) is fixedly connected to the left rotating shaft.

8. The method for preparing yellow flower oolong tea according to any one of claims 1 to 7, characterized in that: The yellow flower oolong tea is prepared by mixing yellow flowers and oolong tea. The content of the yellow flowers is 5%-15%, and the content of the oolong tea is 95%-85%.

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