A tea crusher with adjustable gap

Abstract

This invention discloses a tea crusher with adjustable gap, comprising an upper frame, a lower frame, a spiral crushing drum, and a crushing screen. Both the crushing screen and the spiral crushing drum are mounted on the upper frame, with the spiral crushing drum located inside the crushing screen. One side of the upper frame is hinged to the lower frame via an angle-adjusting hinge, while the other side has an angle-adjusting handwheel and an angle-adjusting screw. The lower end of the angle-adjusting screw is rotatably connected to the lower frame and axially fixed, while the upper end is threadedly connected to the upper frame, used to adjust the upper frame's swing around the hinge to change the installation angle. Each end of the spiral crushing drum has an independent gap adjustment mechanism for adjusting the gap between the drum and the crushing screen. This invention controls the material flow rate through angle adjustment and the discharge particle size through gap adjustment. These two functions are decoupled and do not interfere with each other, achieving independent and flexible adjustment of the angle and gap. The structure is simple and easy to operate, effectively crushing tea leaves while preserving the tea stems to the greatest extent possible.

Description

Technical Field

[0001] This invention relates to the field of tea processing equipment technology, specifically to an adjustable-gap crusher for tea processing. Background Technology

[0002] In tea processing, especially in the production of broken black tea, tea bags, and tea powder, tea leaves need to be crushed first to facilitate subsequent stem and leaf separation and drying. After pre-treatment such as withering, tea leaves become more brittle and prone to breakage, while tea stems are high in fiber, flexible, and less prone to breakage. The ideal processing state is to fully crush the tea leaves while preserving the integrity of the tea stems to the greatest extent possible, so that the stems can be separated from the broken tea leaves through winnowing later.

[0003] Existing tea crushing equipment suffers from inconvenient and low-precision adjustment of the crushing gap, resulting in inconsistent output particle size and affecting subsequent air separation effects, failing to meet the requirements of flexible gap adjustment in tea crushing. Furthermore, most existing equipment uses horizontal fixed installation, making it impossible to flexibly adjust the installation angle of the crushing unit according to different tea varieties and processing volumes. The axial flow velocity of tea leaves within the drum is uncontrollable, resulting in poor adaptability.

[0004] Therefore, there is an urgent need for a tea crusher that can flexibly adjust the installation angle and precisely adjust the gap between the drum and the screen to meet the crushing requirements of different varieties of tea. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a tea crusher with adjustable gap, which can adjust the installation angle of the crushing unit to control the material flow rate and precisely adjust the gap between the drum and the screen to control the output particle size.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: An adjustable-gap tea crusher includes an upper frame, a lower frame, a spiral crushing drum, and a crushing screen. Both the crushing screen and the spiral crushing drum are mounted on the upper frame, with the spiral crushing drum located inside the crushing screen. One side of the upper frame is hinged to the lower frame via an angle-adjusting hinge. The other side of the upper frame opposite the hinged side is provided with an angle-adjusting handwheel and an angle-adjusting screw. The angle-adjusting handwheel is fixedly mounted on the angle-adjusting screw, which is vertically oriented. Its lower end is rotatably connected to the lower frame and axially fixed, while its upper end is threadedly connected to the upper frame. The angle-adjusting handwheel is used to adjust the swing of the upper frame around the angle-adjusting hinge, thereby changing the installation angle of the spiral crushing drum and the crushing screen. Each end of the spiral crushing drum is provided with an independent gap adjustment mechanism, each mechanism independently adjusting the gap between the corresponding end of the spiral crushing drum and the crushing screen.

[0007] Furthermore, the shredding mesh is U-shaped.

[0008] Furthermore, each of the aforementioned gap adjustment mechanisms includes a fine-tuning screw, an adjusting nut, and a slider. The adjusting nut is fixedly installed on the upper frame, the fine-tuning screw is vertically inserted into the adjusting nut and threadedly engaged with it, and the slider is fixedly installed at the upper end of the fine-tuning screw and located below the bearing seat of the spiral crushing drum, for pushing the bearing seat.

[0009] Furthermore, the spiral crushing drum is equipped with spiral blades, which are used to squeeze and tear the tea leaves during rotation, and at the same time push the tea leaves to move axially from the feed end to the discharge end.

[0010] Furthermore, it also includes a feed hopper, which is located above the feed end of the spiral crusher drum and has a forward baffle inside to limit the amount of material passing through.

[0011] Furthermore, it also includes a transmission geared motor, which is located on the hinge side of the upper frame and connected to the rotating shaft of the spiral crushing drum via a coupling, for driving the spiral crushing drum to rotate.

[0012] Furthermore, there are two symmetrically arranged angle adjustment handwheels, which are respectively placed at both ends of the opposite side of the upper frame and the hinge side, and each angle adjustment handwheel is connected to an angle adjustment screw.

[0013] Compared with the prior art, the present invention provides a tea crusher with adjustable gap, which has the following beneficial effects: 1. This invention allows the entire crushing unit to swing around the hinge by adjusting the angle of the handwheel and the hinge, thereby flexibly adjusting the installation angle and controlling the axial flow speed of the tea leaves in the drum to meet the needs of different varieties and processing volumes. At the same time, independent gap adjustment mechanisms are set at both ends of the drum to precisely adjust the gap between the drum and the screen at both ends, so that the gap is uniform throughout the length and ensures the uniformity of the output particle size.

[0014] 2. Angle adjustment is achieved by the overall swing of the upper frame, changing the inclination angle of the entire crushing unit; gap adjustment is achieved through independent fine-tuning mechanisms at each end, changing the local gap between the drum and the screen. Each of the two adjustments performs its specific function, offering convenient operation and high precision.

[0015] 3. By using spiral blades to squeeze, rub, and crush the tea leaves while simultaneously propelling the material forward, the crushing and conveying processes are synchronized, resulting in uniform particle size. This process fully crushes the tea leaves while preserving the integrity of the tea stems to the greatest extent possible, creating favorable conditions for subsequent stem-leaf separation.

[0016] 4. By limiting the feed speed through forward baffles, controlling the material flow rate through angle adjustment, and controlling the discharge particle size through gap adjustment, the three work together to form a complete and controllable crushing scheme. Attached Figure Description

[0017] The present invention will now be described with reference to the accompanying drawings.

[0018] Figure 1 This is a side view schematic diagram of the overall structure of the crusher of the present invention.

[0019] Figure 2 This is a top view schematic diagram of the overall structure of the crusher of this invention.

[0020] Figure 3 This is a front view schematic diagram of the overall structure of the crusher of the present invention.

[0021] Figure 4 This is a cross-sectional schematic diagram of the spiral crushing cylinder and crushing mesh in this invention.

[0022] Figure 5 This is a front view schematic diagram of the gap adjustment mechanism in this invention.

[0023] In the diagram: 1-Upper frame; 2-Lower frame; 3-Spiral crushing drum; 4-Crushing screen; 5-Angle adjusting hinge; 6-Gap adjusting mechanism; 61-Fine-tuning screw; 62-Adjusting nut; 63-Slider; 7-Angle adjusting handwheel; 8-Angle adjusting screw; 9-Feed hopper; 91-Forward baffle; 10-Drive reduction motor. Detailed Implementation

[0024] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] like Figures 1 to 3 As shown in the figure, this embodiment provides a tea crusher with adjustable gap, including an upper frame 1, a lower frame 2, a spiral crushing drum 3, and a crushing screen 4.

[0026] The crushing screen 4 is U-shaped and fixedly installed on the upper frame 1. The spiral crushing drum 3 is arranged horizontally in the front-to-back direction, with a feed end and a discharge end at each end, and is installed on the upper frame 1 through bearing seats at both ends. Figure 4As shown, the spiral crushing drum 3 is located inside the crushing screen 4, and a crushing gap is formed between its outer wall and the inner wall of the crushing screen 4. The spiral crushing drum 3 is equipped with spiral blades, which squeeze and tear the tea leaves during rotation, and at the same time push the tea leaves axially from the feed end to the discharge end.

[0027] One side of the upper frame 1 is hinged to the lower frame 2 via an angle-adjusting hinge 5. The angle-adjusting hinge 5 is a precision rotary joint that allows the upper frame 1 to rotate around its axis while restricting its movement in other directions.

[0028] On the opposite side of the upper frame 1 from the hinged side, there are angle adjustment handwheels 7 and angle adjustment screws 8. Two angle adjustment handwheels 7 are symmetrically arranged, located at opposite ends of this side, and each handwheel is fixedly mounted on a corresponding angle adjustment screw 8. The angle adjustment screw 8 is vertically oriented, its lower end rotatably connected to the lower frame 2 and axially fixed, allowing it to rotate only around its own axis and preventing vertical movement; its upper end is threadedly connected to the upper frame 1.

[0029] The spiral crushing drum 3 has independent gap adjustment mechanisms 6 at both ends, which are used to independently adjust the gap between the corresponding ends of the spiral crushing drum 3 and the crushing screen 4. Figure 5 As shown, each gap adjustment mechanism 6 includes a fine-tuning screw 61, an adjusting nut 62, and a slider 63. The adjusting nut 62 is fixedly installed on the upper frame 1 at a position below the bearing seat at the end of the spiral crushing drum 3. The fine-tuning screw 61 is vertically inserted into the adjusting nut 62 and threadedly engaged with it. The slider 63 is fixedly installed at the upper end of the fine-tuning screw 61, located below the bearing seat of the spiral crushing drum 3, and is used to push the bearing seat.

[0030] The feed hopper 9 is positioned above the feed end of the spiral crushing drum 3. A forward baffle 91 is installed inside the feed hopper 9, which is inclined and fixedly mounted on the inner wall of the feed hopper 9 along the material flow direction, with a gap between its lower end and the opposite inner wall of the feed hopper 9. After the material enters from the feed hopper 9, it is intercepted by the forward baffle 91 and can only pass through this gap, thus limiting the amount of material passing through at one time. This ensures that the tea raw materials enter the spiral crushing drum 3 evenly, preventing uneven crushing or blockage caused by excessively rapid feeding.

[0031] The transmission reduction motor 10 is mounted on the upper frame 1 and connected to the rotating shaft of the spiral crushing drum 3 via a coupling, and is used to drive the spiral crushing drum 3 to rotate.

[0032] The angle adjustment process is as follows: Angle adjustment is used to change the overall installation tilt angle of the spiral crushing drum 3 and the crushing screen 4, thereby controlling the axial flow speed of tea leaves inside the drum.

[0033] The operator rotates the angle adjustment handwheels 7 on both sides simultaneously. The angle adjustment handwheels 7 drive the angle adjustment screw 8 to rotate synchronously. The lower end of the angle adjustment screw 8 is rotatably connected to the lower frame 2 and is axially fixed, so the screw can only rotate in place and cannot move up or down; the upper end drives the upper frame 1 to rise or fall vertically on the screw side through a threaded drive connection. Since the other side of the upper frame 1 is hinged to the lower frame 2 through the angle adjustment hinge 5, when the screw side rises or falls, the upper frame 1 as a whole swings around the angle adjustment hinge 5.

[0034] Since both the spiral crushing drum 3 and the crushing screen 4 are fixedly installed on the upper frame 1, they swing together as a whole with the upper frame 1, thereby changing the installation angle of the entire crushing unit. When the angle increases, the axial flow velocity of the tea leaves inside the drum increases; when the angle decreases, the axial flow velocity of the tea leaves inside the drum decreases. Operators can flexibly adjust the angle according to the tea variety and processing volume to achieve the best processing efficiency and crushing effect.

[0035] Gap adjustment operation process: The gap adjustment is used to precisely set the gap between the spiral crushing drum 3 and the crushing screen 4 in order to control the output particle size.

[0036] Each end of the spiral crushing drum 3 is equipped with an independent gap adjustment mechanism 6. The operator adjusts the gap adjustment mechanism 6 at each end by rotating the fine-tuning screw 61. The fine-tuning screw 61 moves vertically up and down in the adjusting nut 62, causing the slider 63 to move up and down synchronously. When the fine-tuning screw 61 rotates upward, the slider 63 rises accordingly, pushing against the bearing seat, thus increasing the gap between the drum and the crushing screen 4 at that end. When the fine-tuning screw 61 rotates downward, the slider 63 descends accordingly, releasing the bearing seat, and the drum moves downward under its own gravity, thus decreasing the gap.

[0037] By adjusting the gap adjustment mechanism 6 at both ends, the gap between the spiral crushing drum 3 and the crushing screen 4 can be made uniform along the entire length, ensuring the uniformity of the output particle size.

[0038] Crushing process: After completing the angle and gap adjustments, start the transmission reduction motor 10, which drives the spiral crushing drum 3 to rotate via the coupling. The tea raw materials are fed into the feed hopper 9, and after being limited by the forward baffle 91, they are evenly fed into the feed end of the spiral crushing drum 3.

[0039] The spiral blades on the spiral crushing drum 3 squeeze and tear the tea leaves during rotation. Tea pieces crushed to a size smaller than the mesh size of the crushing screen 4 pass through the mesh and fall into the next process; intact tea stems and large leaves that fail to pass through the mesh are pushed to the discharge end by the spiral blades and discharged.

[0040] Because the installation tilt angle has been precisely set through angle adjustment, the axial flow speed of the tea leaves in the drum is appropriate; because the gaps between the two ends of the drum and the screen have been precisely adjusted by their respective gap adjustment mechanisms 6, the crushing effect on the tea leaves along the entire length of the drum is uniform and controllable, thereby achieving the effect of fully crushing the tea leaves while maintaining the integrity of the tea stems to the greatest extent.

[0041] Other aspects of this invention that are not detailed herein are all conventional techniques known to those skilled in the art.

[0042] It should be noted that the terms “comprising,” “including,” or any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] The scope of protection of this invention is not limited to the technical solutions disclosed in the specific embodiments. Any modifications, equivalent substitutions, improvements, etc., made to the above embodiments based on the technical essence of this invention shall fall within the scope of protection of this invention.

Claims

1. A tea leaf breaker with adjustable gap, characterized by: The assembly includes an upper frame (1), a lower frame (2), a spiral crushing drum (3), and a crushing screen (4). Both the crushing screen (4) and the spiral crushing drum (3) are mounted on the upper frame (2), with the spiral crushing drum (3) located inside the crushing screen (4). One side of the upper frame (1) is hinged to the lower frame (2) via an angle-adjusting hinge (5). The other side of the upper frame (1), opposite to the hinged side, is equipped with an angle-adjusting handwheel (7) and an angle-adjusting screw (8). The angle-adjusting handwheel (7) is fixedly mounted on the angle-adjusting screw (8). Angle adjustment screw (8) is set in the vertical direction. Its lower end is rotatably connected to the lower frame (2) and axially fixed. Its upper end is threadedly connected to the upper frame (1). The angle adjustment handwheel (7) is used to adjust the upper frame (1) to swing around the angle adjustment hinge (5) to change the installation angle of the spiral crushing drum (3) and the crushing screen (4). The two ends of the spiral crushing drum (3) are respectively provided with independent gap adjustment mechanisms (6). Each gap adjustment mechanism (6) is used to independently adjust the gap between the corresponding end of the spiral crushing drum (3) and the crushing screen (4).

2. A tea breaker with adjustable gap as claimed in claim 1 wherein: The crushing mesh (4) is U-shaped.

3. A tea breaker with adjustable gap as claimed in claim 1 wherein: Each of the gap adjustment mechanisms (6) includes a fine-tuning screw (61), an adjusting nut (62), and a slider (63). The adjusting nut (62) is fixedly installed on the upper frame (1). The fine-tuning screw (61) is vertically inserted into the adjusting nut (62) and threadedly engaged with it. The slider (63) is fixedly installed at the upper end of the fine-tuning screw (61) and located below the bearing seat of the spiral crushing drum (3) for pushing the bearing seat.

4. The gap-adjustable tea leaf breaker as claimed in claim 1, wherein: The spiral crushing drum (3) is equipped with spiral blades, which are used to squeeze and tear the tea leaves during rotation, and at the same time push the tea leaves to move axially from the feed end to the discharge end.

5. The gap adjustable tea leaf breaker as claimed in claim 1, wherein: It also includes a feed hopper (9), which is located above the feed end of the spiral crushing drum (3) and has a forward baffle (91) inside to limit the amount of material passing through.

6. A tea breaker with adjustable gap as claimed in claim 1 wherein: It also includes a transmission reduction motor (10), which is located on the hinge side of the upper frame (1) and connected to the rotating shaft of the spiral crushing drum (3) through a coupling, for driving the spiral crushing drum (3) to rotate.

7. The gap adjustable tea leaf breaker as claimed in claim 1, wherein: The angle adjustment handwheels (7) are two symmetrically arranged, respectively placed at both ends of the upper frame (1) opposite to the hinge side, and each angle adjustment handwheel (7) is connected to an angle adjustment screw (8).

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