Drum-type tea leaf fixation machine

Abstract

The utility model discloses a drum-type tea leaf fixation machine which comprises a supporting seat, and a self-conveying fixation mechanism and a pneumatic turning mechanism are arranged above the supporting seat; the conveying barrel is fixedly installed at the upper end of the supporting base, a conveying screw rod is installed in the conveying barrel, and a spiral plate of the conveying screw rod is tightly attached to the inner wall of the conveying barrel. The motor support is fixed to the right end of the supporting base, the stepping motor is installed at the upper end of the motor support, and the transmission end of the stepping motor is connected with the conveying screw rod. The feeding hopper is fixed to the right end of the conveying barrel, and the discharging opening is formed in the left end of the conveying barrel. The heating cylinder fixedly wraps the middle part of the conveying cylinder, and multiple groups of heat conduction pipes are arranged in the heating cylinder around the conveying cylinder; the drum-type tea leaf fixation machine is additionally provided with the self-conveying fixation mechanism and the pneumatic turning mechanism, the self-conveying fixation mechanism improves the fixation uniformity through mechanical bidirectional stirring and heat conduction optimization, the pneumatic turning mechanism supplements a physical turning blind area through airflow disturbance, and efficient and automatic fixation of tea leaves is achieved through cooperation of the self-conveying fixation mechanism and the pneumatic turning mechanism. And energy conservation, consumption reduction and quality stability are achieved.

Description

Technical Field

[0001] This utility model relates to the field of tea processing technology, specifically a drum-type tea fixing machine. Background Technology

[0002] Tea fixation is a core step in tea processing that uses high temperatures to destroy the activity of oxidases in fresh leaves and terminate fermentation. The principle is to use continuous high temperatures of 150-300℃ to rapidly inactivate polyphenol oxidases, preventing the enzymatic oxidation of tea polyphenols. At the same time, some moisture in the fresh leaves is evaporated, softening the leaf tissue for subsequent rolling and shaping. During this process, a large amount of grassy substances in the fresh leaves volatilize, while floral and fruity aroma substances are retained and transformed. By precisely controlling the temperature curve, time parameters, and heat transfer methods, the enzyme activity is completely deactivated while the quality components such as theaflavins and theanine are preserved to the maximum extent, forming the quality basis of different tea types.

[0003] Based on existing drum-type tea fixing machines, it has been found that uneven heating of tea leaves is common during the fixing process, resulting in tea leaves accumulating inside the drum, with scorched edges and undercooked centers. In addition, existing drum-type tea fixing machines require manual filling and unloading, which is time-consuming and labor-intensive. Therefore, this utility model designs a drum-type tea fixing machine to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a drum-type tea fixing machine to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A drum-type tea fixing machine includes a support base, above which are a self-feeding fixing mechanism and a pneumatic turning mechanism. The self-feeding fixing mechanism includes a feeding cylinder, a feeding screw, a motor bracket, a stepper motor, a feeding hopper, a discharge port, a heating cylinder, and a heat-conducting pipe. The feeding cylinder is fixedly installed on the upper end of the support base, and a feeding screw is installed inside it, with the screw plate of the feeding screw tightly against the inner wall of the feeding cylinder. The motor bracket is fixed to the right end of the support base, and a stepper motor is installed on its upper end. The drive end of the stepper motor is connected to the feeding screw. The hopper is fixed to the right end of the conveying cylinder, and the discharge port is opened at the left end of the conveying cylinder; the heating cylinder is fixedly wrapped around the middle of the conveying cylinder, and multiple sets of heat-conducting pipes are arranged around the conveying cylinder inside; the pneumatic tipping mechanism includes an air pump body, a fixed plate, an air inlet pipe, an air outlet pipe, an air supply pipe, an air distribution pipe, a fixed frame, and a connecting frame. The air distribution pipe is inserted into the heating cylinder, and its upper end is connected to the air supply pipe. The air pump body is connected to the air supply pipe through the air outlet pipe. The fixed frame is installed on the upper end of the air pump body through the fixed plate. The fixed frame is a rectangular frame structure and is fixed to the support base through the connecting frame.

[0007] Optionally, the stepper motor can rotate in both directions to drive the feeding screw to achieve bidirectional conveying of tea leaves in the feeding cylinder.

[0008] Optionally, multiple heat-conducting pipes are arranged to surround the outside of the feed cylinder and are evenly distributed, and two gas distribution pipes are provided, which are inserted into both sides of the heating cylinder and extend into the interior of the feed cylinder.

[0009] Optionally, the gas supply pipeline is connected to two gas distribution pipes, which are connected to the gas pump body through the gas outlet pipe.

[0010] Optionally, the outlet axis of the injection hopper coincides with the axis of the conveying screw, and the air inlet pipe of the air pump body is arranged downward and perpendicular to the axis of the conveying cylinder.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This utility model is equipped with a self-feeding blanching mechanism. Through the bidirectional drive of the feeding screw and the variable pitch design, the tea leaves are reciprocated and the heating time is precisely controlled. With the uniform heating of the heat pipe, the problems of undercooked center and burnt edge are effectively solved. The axis alignment design of the feeding hopper and the discharge port, combined with the fixed installation of the feeding cylinder, realizes the fully automated feeding process and reduces manual intervention.

[0013] 2. In this utility model, a pneumatic turning mechanism is provided, which uses air distribution pipe injection to form an airflow disturbance structure covering the inside of the conveying cylinder, completely eliminating mechanical stirring dead zones; the rigid connection design of the fixed plate, fixed frame and connecting frame in the pneumatic turning mechanism ensures stable delivery of high-pressure airflow. Attached Figure Description

[0014] Figure 1 This is a three-dimensional front view structural diagram of the present invention;

[0015] Figure 2 This is a schematic diagram of the structure of this utility model from a frontal view.

[0016] Figure 3 This is a three-dimensional top view of the structure of this utility model;

[0017] Figure 4 This is a three-dimensional, bottom-view structural diagram of the present invention;

[0018] Figure 5 This is a top view of the structure of this utility model;

[0019] Figure 6 This is a three-dimensional sectional view of the structure of this utility model. Figure 1 ;

[0020] Figure 7This is a three-dimensional sectional view of the structure of this utility model. Figure 2 ;

[0021] Figure 8 This is a three-dimensional sectional view of the structure of this utility model. Figure 3 .

[0022] In the diagram: 1. Support base; 2. Self-feeding blanching mechanism; 201. Feeding cylinder; 202. Feeding screw; 203. Motor bracket; 204. Stepper motor; 205. Feeding hopper; 206. Discharge port; 207. Heating cylinder; 208. Heat conduction pipe; 3. Pneumatic turning mechanism; 301. Air pump body; 302. Fixing plate; 303. Air inlet pipe; 304. Air outlet pipe; 305. Air supply pipe; 306. Air distribution pipe; 307. Fixing frame; 308. Connecting frame. Detailed Implementation

[0023] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-8 In this embodiment of the invention, the drum-type tea fixing machine includes a support base 1, a self-feeding fixing mechanism 2, and a pneumatic turning mechanism 3, achieving uniform fixing of tea leaves through a combination of mechanical and pneumatic actions.

[0027] The self-feeding blanching mechanism 2 has a horizontal cylindrical feed cylinder 201 that is fixed to the upper end of the support base 1 by welding. The feed screw 202 is coaxially installed inside the cylinder. The gap between the outer edge of the screw plate and the inner wall of the feed cylinder 201 is ≤1mm to prevent tea residue.

[0028] Drive components: Stepper motor 204 is fixed to the upper end of motor bracket 203 by bolts, and motor bracket 203 is welded to the right end of support base 1; the output shaft of stepper motor 204 is connected to the right end of conveying screw 202 through a coupling, driving the screw to rotate in both directions.

[0029] Heating module: The heating cylinder 207 is a stainless steel annular shell, which is welded around the middle of the conveying cylinder 201; multiple sets of copper heat conduction pipes 208 are installed inside the conveying cylinder 201, and the heat conduction pipes 208 are connected to an external electric heating device, with segmented temperature control (100-120℃ at the front end and 80-90℃ at the rear end).

[0030] Inlet and outlet: The feeding hopper 205 is a guide funnel, welded to the top right end of the conveying cylinder 201, and its outlet axis coincides with the axis of the conveying screw 202; the discharge port 206 is a rectangular opening, located at the bottom left end of the conveying cylinder 201.

[0031] The pneumatic tipping mechanism 3 has an internal air pump body 301 that is fixed to the fixed plate 302 by bolts, and the fixed plate 302 is welded to the left side of the fixed frame 307.

[0032] Piping layout: One end of the air outlet pipe 304 is connected to the air outlet of the air pump body 301, and the other end is connected to the stainless steel air supply pipe 305; the lower end of the air supply pipe 305 is connected to two branch pipes 306, which pass through the side wall of the heating cylinder 207 and are inserted into the inner cavity of the feeding cylinder 201.

[0033] Fixed structure: The fixed frame 307 is a rectangular steel frame, which is connected to the connecting frame 308 by bolts. The connecting frame 308 is welded to the right side of the support base 1.

[0034] The working principle of this utility model is as follows: The overall process is divided into four steps: feeding and heating, bidirectional stirring, pneumatic turning, and discharging. Feeding and heating: The tea leaves to be processed enter the conveying cylinder 201 through the feeding hopper 205. The stepper motor 204 drives the conveying screw 202 to rotate clockwise and convey the tea leaves from right to left, pushing them to the heating zone in the middle of the conveying cylinder 201. Multiple sets of heat-conducting pipes 208 surrounding the conveying cylinder 201 inside the heating cylinder 207 are activated for heating, and heat is evenly conducted to the tea leaves inside the conveying cylinder 201 through the wall of the conveying cylinder 201. Bidirectional stirring: When the tea leaves reach the front of the discharge port 206, the stepper motor 204 drives the conveying screw 202 in the opposite direction to convey them from left to right. The tea leaves move in opposite directions under the pressure of the screw plate, forming a reciprocating stirring motion to prevent accumulation. The screw plate of the conveying screw 202 is in close contact with the inner wall of the conveying cylinder 201 to ensure no residue remains. Pneumatic turning: Air pump body 301 draws in air through air inlet pipe 303, pressurizes it, and delivers it to air supply pipe 305 through air outlet pipe 304, then splits it into two air distribution pipes 306 inserted into heating cylinder 207; the ends of air distribution pipes 306 extend into the inside of conveying cylinder 201, and high-pressure airflow is sprayed obliquely upward through the spray holes on its side wall, impacting the tea leaves to form a vortex, further breaking up the clumps. Discharge stage: After the withering is completed, stepper motor 204 resumes unidirectional rotation, and conveying screw 202 pushes the tea leaves to discharge port 206 for automatic discharge.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A drum-type tea fixing machine, comprising a support base (1), characterized in that: Above the support base (1) are a self-feeding blanching mechanism (2) and a pneumatic turning mechanism (3); the self-feeding blanching mechanism (2) includes a feeding cylinder (201), a feeding screw (202), a motor bracket (203), a stepper motor (204), a feeding hopper (205), a discharge port (206), a heating cylinder (207), and a heat-conducting pipe (208). The feeding cylinder (201) is fixedly installed on the upper end of the support base (1), and a feeding screw (202) is installed inside it. The spiral plate of the feeding screw (202) is in close contact with the inner wall of the feeding cylinder (201). The motor bracket (203) is fixed to the right end of the support base (1), and a stepper motor (204) is installed on its upper end. The transmission end of the stepper motor (204) is connected to the feeding screw (202). The feeding hopper (205) is fixed to the right end of the feeding cylinder (201), and the discharge port (206) is connected to the feeding screw (202). The heating cylinder (207) is located at the left end of the conveying cylinder (201); the heating cylinder (207) is fixedly wrapped around the middle of the conveying cylinder (201), and multiple sets of heat-conducting pipes (208) are arranged around the conveying cylinder (201) inside; the pneumatic turning mechanism (3) includes an air pump body (301), a fixing plate (302), an air inlet pipe (303), an air outlet pipe (304), an air conveying pipe (305), an air distribution pipe (306), a fixing frame (307), and a connecting frame ( 308), the gas distribution pipe (306) is inserted into the heating cylinder (207), and its upper end is connected to the gas supply pipe (305). The gas pump body (301) is connected to the gas supply pipe (305) through the gas outlet pipe (304). The upper end of the gas pump body (301) is equipped with a fixing bracket (307) through a fixing plate (302). The fixing bracket (307) is a rectangular frame structure and is fixed to the support base (1) through a connecting bracket (308).

2. The drum-type tea fixing machine according to claim 1, characterized in that: The stepper motor (204) can rotate in both directions to drive the feeding screw (202) to realize bidirectional conveying of tea leaves in the feeding cylinder (201).

3. The drum-type tea fixing machine according to claim 1, characterized in that: Multiple heat-conducting pipes (208) are arranged to surround the outside of the feed cylinder (201) and are evenly distributed. Two gas distribution pipes (306) are provided, which are inserted into both sides of the heating cylinder (207) and extend into the interior of the feed cylinder (201).

4. The drum-type tea fixing machine according to claim 1, characterized in that: The gas supply pipe (305) is connected to two gas distribution pipes (306) respectively, and is connected to the gas pump body (301) through the gas outlet pipe (304).

5. A drum-type tea fixing machine according to claim 1, characterized in that: The outlet axis of the hopper (205) coincides with the axis of the conveying screw (202), and the air inlet pipe (303) of the air pump body (301) is arranged downward and perpendicular to the axis of the conveying cylinder (201).

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