Crushing device for tea classification and grading

Abstract

The utility model discloses a crushing device for tea classification and grading, which comprises a multi-stage net, the multi-stage net comprises a downwards concave arc-shaped multi-stage screen, one side of the multi-stage screen is connected with a fixed side plate, the other side of the multi-stage screen is connected with a movable side plate, the fixed side plate is fixedly arranged on one side of a support frame, and the movable side plate is movably lapped on the other side of the support frame; a sealing plate is attached to each of the two ends of the multi-stage screen, and the sealing plates are mounted on the supporting frame; rotating shafts are arranged at the two ends of the rotating drum, parts of the rotating shafts are inserted into the multi-stage screen, the rotating shafts are installed on the supporting frame through rotating drum distance adjusting pieces, and a plurality of stage smashing pieces are installed on the rotating drum along the longitudinal circumferential face and correspond to the multi-stage screen; one end of the screen distance adjusting piece is mounted on the support frame, and the other end is in transmission connection with the movable side plate; one end of the cover body is hinged with the support frame, the other end of the cover body is provided with a lapping plate, and when the cover body movably covers the rotary drum, the lapping plate is lapped with the movable side plate; one end of the locking mechanism is hinged with the support frame, and the other end of the locking mechanism movably locks the lapping plate and the movable side plate on the support frame; and the driving mechanism is in transmission connection with a rotating shaft.

Description

Technical Field

[0001] This utility model relates to a tea pulverizing device, specifically a pulverizing device for tea grading. Background Technology

[0002] The main components of tea include tea polyphenols, caffeine, amino acids, minerals, and vitamins. When tea is steeped, these components dissolve into the water. Drinking tea can stimulate the central nervous system, promote metabolism, strengthen the heart and relieve spasms, lower blood pressure and blood lipids, promote gastric juice secretion, aid digestion, relieve greasiness, and enhance the body's resistance.

[0003] Besides leaf-shaped tea, tea leaves also come in various forms such as broken tea and powdered tea. Broken tea and powdered tea are usually processed further using tea processing equipment.

[0004] The search revealed the following existing processing equipment for broken tea and powdered tea:

[0005] 1. Chinese patent application (CN119014471A) discloses a rotary cutting machine in its specification, comprising: a frame, a housing, a first roller, a second roller, and a cutter; the first roller is coaxially connected to the second roller to form a gap between the outer wall of the first roller and the inner wall of the first roller; the second roller rotates on the frame; the first roller and the second roller are placed horizontally, with one end of the first roller forming a feed inlet and the other end forming a first discharge outlet; the end of the second roller near the first discharge outlet forms a second discharge outlet; the first roller wall has multiple first through holes, and the second roller... The wall has multiple second through holes, the size of which is smaller than that of the first through hole. The outer casing is mounted on the frame and covers the second roller. The outer casing forms a first discharge channel, a second discharge channel, and a third discharge channel. The first discharge channel is opposite to and communicates with the first discharge port, the second discharge channel is opposite to and communicates with the second discharge port, and the third discharge channel is opposite to and communicates with the bottom of the second roller. The cutter includes a handle and a blade. The handle is connected to the frame and extends into the first roller, and the blade is connected to the handle and located within the first roller, forming a cutting space between the blade and the inner wall of the first roller. An adjustment assembly is also included, located between the frame and the handle, for adjusting the distance between the blade and the inner wall of the first roller.

[0006] 2. Chinese Patent (CN220211767U) discloses a multifunctional grinding device for tea production in its specification, including a processing tank and an inlet and an outlet opened at the top and bottom of the processing tank. A fixing ring is fixedly connected to the inner side wall of the processing tank. A coarse grinding ring-shaped upper grinding block and a fine grinding ring-shaped lower grinding block are rotatably connected to the inner side wall of the fixing ring. The inlet hole of the coarse grinding ring-shaped upper grinding block and the outlet hole of the fine grinding ring-shaped lower grinding block are respectively connected to the inlet and the outlet. Multiple fixing rods are fixedly connected to the inner side wall of the outlet. The top of the multiple fixing rods is fixedly connected to the same fine grinding ring-shaped upper grinding block. The top of the fine grinding ring-shaped upper grinding block is fixedly connected to the coarse grinding ring-shaped lower grinding block. A support frame is fixedly connected to the bottom of the processing tank. Multiple locking casters are fixedly installed at the bottom of the support frame. A rotating device is provided on the outer side wall of the processing tank to allow the coarse grinding ring-shaped upper grinding block and the fine grinding ring-shaped lower grinding block to rotate.

[0007] The inventor discovered that the position between the first and second rollers in the above-mentioned rolling cutter is fixed and cannot be adjusted. Although the adjusting component adjusts the distance between the blade and the inner wall of the first roller, a single adjustment of the distance between the blade and the inner wall of the first roller produces only one type of broken tea.

[0008] Furthermore, the aforementioned multi-functional pulverizing device for tea production can achieve secondary pulverization of tea leaves; however, it can only be used to produce pulverized tea, and its production function is limited.

[0009] Therefore, in order to address the shortcomings of the existing technology, a pulverizing device for tea grading has been developed. Utility Model Content

[0010] The purpose of this invention is to address the shortcomings of existing technologies by providing a pulverizing device for tea grading.

[0011] In order to achieve the above-mentioned objectives of this utility model, the following technical solution is adopted:

[0012] A pulverizing device for grading tea varieties includes a multi-stage mesh, comprising a fixed-edge plate, a movable-edge plate, and a multi-stage sieve. The multi-stage sieve has a downwardly concave arc-shaped mesh structure, with one side connected to the fixed-edge plate and the other side connected to the movable-edge plate. The fixed-edge plate is fixedly installed on one side of a support frame, and the movable-edge plate is movably overlapped on the other side of the support frame. A sealing plate is attached to both ends of the multi-stage sieve and is installed on the support frame. A rotating drum has rotating shafts at both ends, partially inserted into the multi-stage sieve. Each rotating shaft is installed on the support frame via a rotating drum adjusting component. The rotating drum has a longitudinal circumferential surface... The system includes: a multi-stage screen with multiple crushing components; a screen adjustment component, one end of which is mounted on a support frame and the other end is connected to a moving side plate; a cover, one end of which is hinged to the support frame and the other end has a mounting plate, which overlaps the moving side plate when the cover is movably fastened to the rotating drum; a locking mechanism, one end of which is hinged to the support frame and the other end of which movably locks the mounting plate and the moving side plate to the support frame; a drive mechanism, which is connected to a rotating shaft; and a hopper, which is mounted on one end of the cover; wherein a discharge port is provided on the sealing plate away from the hopper.

[0013] Furthermore, the rotary drum adjusting component includes a support plate, one end of which is hinged to a support frame, and the other end extending downward at an incline; a bearing seat mounted on the support plate; a first limiting plate connected to the other end of the support plate; a second bolt threaded through the first limiting plate; a second limiting plate mounted on the first limiting plate and extending downward, and the second limiting plate having an arc-shaped adjusting groove; and a first bolt passing through the adjusting groove.

[0014] Furthermore, the pulverizing device for tea grading according to this utility model also includes a bushing, a support base and a support shaft. The support plate is provided with a bushing, the bushing is provided with a shaft hole, the support base is provided with a support shaft and is installed on the support frame, and the support shaft passes through the shaft hole.

[0015] Furthermore, the locking mechanism includes a swing rod, both ends of which are bent, one end of which is fitted with a threaded sleeve and the other end with a rotating shaft; a support sleeve, which is fitted onto the rotating shaft and installed on the support frame; and a support screw, the bolt of which is threaded through the support sleeve.

[0016] Furthermore, the pulverizing device for tea grading of this utility model also includes a guide plate, a partition plate, and a hopper. The guide plate is installed at the bottom of the multi-stage screen. A partition plate is provided between two adjacent screening screens on the outer side of the multi-stage screen, and the partition plate extends and connects to the guide plate. The hopper is installed at one end of the cover. The sealing plate away from the hopper has a zero-stage outlet.

[0017] Furthermore, the screen adjustment component includes a base plate, one end of which is mounted on a support frame, and the other end of which extends outward relative to the support frame and connects to a vertical plate. The vertical plate has a U-shaped groove. A threaded cylinder passes through the U-shaped groove. A retaining ring is mounted on one end of the threaded cylinder. A limiting boss is mounted on the other end of the threaded cylinder. A push-pull screw passes through the limiting boss, the threaded cylinder, and the retaining ring in sequence and is threadedly connected to the threaded cylinder.

[0018] Furthermore, the graded crushing components include a first-stage crushing component, a second-stage crushing component, and a third-stage crushing component. The third-stage crushing component, the second-stage crushing component, and the first-stage crushing component are distributed sequentially along the longitudinal direction on the rotating drum, and the third-stage crushing component corresponds to the hopper.

[0019] Furthermore, the third-stage crushing component is spirally mounted on the rotating drum.

[0020] Furthermore, the second-stage crushing component includes multiple second-stage crushing rods, which are circumferentially distributed on the circumferential surface of the rotating drum at intervals. Each second-stage crushing rod intersects the axis of the rotating drum, and the angle formed by the intersection is α, where 0 < α ≤ 30°.

[0021] Furthermore, the first-stage crushing component includes multiple first-stage crushing rods, which are circumferentially distributed on the circumferential surface of the rotating drum at intervals. Each first-stage crushing rod intersects the axis of the rotating drum, and the included angle formed by the intersection is β, where 5°≤β≤50°.

[0022] The advancements of this invention compared to the prior art are as follows:

[0023] 1. This utility model enables the simultaneous production of powdered tea, broken tea, and tea stems of different specifications from the same batch of raw materials. The rotating drum is equipped with multiple grades of pulverizing components, which can be used to pulverize tea leaves, push the tea leaves, and disperse them. During the production of broken and powdered tea, the distance between the multi-stage screens and the rotating drum is adjusted by the drum and screen adjustment components. This allows the multiple grades of pulverizing components to compress the tea leaves onto the screens, completing the grinding and pulverization. Broken tea and tea powder of different specifications are filtered by the corresponding grade of screen. Furthermore, partitions are installed between adjacent grades of screens, and the filtered broken tea and tea powder are guided by a guide plate to the corresponding grade outlet for discharge.

[0024] 2. In this invention, the rotating drum features a spiral-shaped third-stage crusher, a long-rod-shaped second-stage crusher, and a short-rod-shaped first-stage crusher, arranged sequentially from the hopper towards the zero-stage guide. The spiral-shaped blades evenly distribute the tea leaves falling from the hopper while propelling them forward, preventing localized overload, blocking, and improving crushing efficiency. The long-rod-shaped second-stage crusher and the short-rod-shaped third-stage crusher further disperse the tea leaves, increasing contact between the tea leaves and the graded crushers and multi-stage screens, resulting in more uniform crushing and faster crushing speed. It is understood that the graded crushers of this invention improve crushing efficiency and uniformity, reduce clogging and energy consumption, extend equipment life, and improve product quality.

[0025] 3. The rotary drum adjusting component of this utility model is used to support and install the rotary drum, and can also adjust the position of the rotary drum. The support plate and the first limiting plate are connected at an intersection. The second bolt can thread-fix the first limiting plate to the support frame, and the first bolt can thread-fix the second limiting plate to the support frame.

[0026] 4. The screen spacing adjustment component of this utility model is used to push and pull the moving side plate. The moving side plate drives the multi-stage screen to move, thereby changing the spacing between the multi-stage screen and the multiple grades of crushing parts on the rotating drum. The limiting boss and the retaining ring clamp the threaded cylinder in the U-shaped groove of the vertical plate. When the threaded cylinder is rotated, the push-pull screw screws in and out of the threaded cylinder. The push-pull screw drives the moving side plate, which drives the multi-stage screen to move, thereby adjusting the spacing between the multi-stage screen and the rotating drum. Attached Figure Description

[0027] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0028] Figure 1 This is a schematic diagram of the structure of a tea grading and crushing device according to the present invention.

[0029] Figure 2 This is a schematic diagram of the structure of the rotating drum of this utility model, which is equipped with multiple levels of crushing components;

[0030] Figure 3 This is a schematic diagram of the installation structure of the multi-level network in this utility model;

[0031] Figure 4 This is a schematic diagram of the structure of the rotary drum adjusting component of this utility model;

[0032] Figure 5 This is a schematic diagram of the locking mechanism in this utility model;

[0033] Figure 6 This is a schematic diagram of a screen spacing adjustment component in this utility model;

[0034] The names and serial numbers of each component in the diagram are as follows:

[0035] 3-Grinding device; 31-Cover; 32-Rotating drum; 33-First-stage crushing component; 34-Second-stage crushing component; 35-Hopper; 36-Feed control valve; 37-Feed pipe; 38-Multi-stage screen; 381-Third-stage screen; 382-Second-stage screen; 383-First-stage screen; 384-Moving edge plate; 385-Fixed edge plate; 39-Support base; 391-Support shaft; 310-Rotating shaft; 311-Transmission component. 312-Driven wheel, 313-Driving wheel, 314-Drive shaft, 315-Drive motor, 316-Support frame, 317-Guide plate, 318-Third-stage outlet, 319-Third-stage unloading component, 320-Conveyor, 321-Second-stage outlet, 322-Second-stage unloading component, 323-Baffle plate, 324-First-stage outlet, 325-First-stage unloading component, 326-Longitudinal support component, 327-Vertical support;

[0036] 328-Rotating drum adjusting component, 3281-Shaft sleeve, 32811-Shaft hole, 3282-Second bolt, 3283-Support plate, 3284-Bearing seat, 3285-First limiting plate, 3286-First bolt, 3287-Second limiting plate, 32871-Adjusting groove;

[0037] 329-Locking mechanism, 3291-Support screw, 3292-Pulley, 3293-Anti-detachment plate, 3294-Threaded sleeve, 3295-Swing rod, 3296-Rotating shaft, 3297-Support sleeve;

[0038] 330-Screen adjustment part, 3301-Handle, 3302-Push-pull screw, 3303-Threaded cylinder, 3304-Snap ring, 3305-Base plate, 3306-Limiting boss, 3307-Vertical plate, 33071-U-shaped groove;

[0039] 331 - Third-stage crushing component, 332 - Sealing plate, 333 - Laying plate, 334 - Zero-stage outlet, 335 - Zero-stage unloading component. Detailed Implementation

[0040] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions of this utility model will be clearly and completely described below in conjunction with the accompanying drawings and embodiments. Obviously, the described embodiments are only a part of the embodiments in this application. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this application.

[0041] Example 1:

[0042] like Figures 1 to 6 As shown, this embodiment of a tea grading and crushing device 3 includes a multi-stage screen 38, a sealing plate 332, a guide plate 317, a partition plate 323, a rotating drum 32, a screen spacing adjustment component 330, a cover 31, a locking mechanism 329, a drive mechanism, and a hopper 35. The multi-stage screen 38 includes a fixed-edge plate 385, a movable-edge plate 384, and a multi-stage screen. The multi-stage screen has a downwardly concave arc-shaped mesh structure, with one side connected to the fixed-edge plate 385 and the other side connected to the movable-edge plate 384. The fixed-edge plate 385 is fixedly installed on one side of a support frame 316, and the movable-edge plate 384 is movably overlapped on the other side of the support frame 316. A sealing plate 332 is attached to both ends of the multi-stage screen, and the sealing plate 332 is installed on the support frame 316. The guide plate 317 is installed at the bottom of the multi-stage screen. A partition 323 is provided between adjacent screening screens on the outer side of the multi-stage screen, and the partition 323 extends and connects to the guide plate 317. Rotating shafts 310 are provided at both ends of the rotating drum 32, and are partially inserted into the multi-stage screen. Each rotating shaft 310 is mounted to the support frame 316 via a rotating drum adjusting member 328. Multiple grades of crushing components are installed on the longitudinal circumferential surface of the rotating drum 32, corresponding to the multi-stage screen. One end of the screen adjusting member 330 is mounted to the support frame 316, and the other end is connected to the moving side plate 384. One end of the cover 31 is hinged to the support frame 316, and the other end is provided with an overlapping plate 333. When the cover 31 is movably fastened to the rotating drum 32, the overlapping plate 333 overlaps the moving side plate 384. One end of the locking mechanism 329 is hinged to the support frame 316, and the other end movably locks the overlapping plate 333 and the moving side plate 384 to the support frame 316. The drive mechanism is connected to a rotating shaft 310; the hopper 35 is installed at one end of the cover 31; and the sealing plate 332 away from the hopper 35 has a zero-level outlet 334.

[0043] To facilitate the centralized conveying of tea leaves discharged from the zero-stage outlet 334, a zero-stage unloading component 335 is added. One end of the zero-stage unloading component 335 is installed at the zero-stage outlet 334, and the other end extends downward at an angle relative to the support frame 316. Tea leaves fall from the multi-stage screen 38 through the zero-stage outlet 334 into the zero-stage unloading component 335, which then guides the tea leaves outward.

[0044] One structure of the drive mechanism includes a drive motor 315, a drive shaft 314, a driven wheel 312 and a drive wheel 313. The drive motor 315 is provided with a drive shaft 314. The drive wheel 313 is keyed to the drive shaft 314. The driven wheel 312 is keyed to a rotating shaft 310. The drive wheel 313 and the driven wheel 312 are connected by a transmission.

[0045] One transmission connection method between the driving pulley 313 and the driven pulley 312: The driving pulley 313 and the driven pulley 312 are connected by a transmission component 311. The transmission component 311 can be a transmission belt or a transmission chain. When the transmission component is a transmission belt, both the driving pulley 313 and the driven pulley 312 are pulleys. When the transmission component 311 is a transmission chain, both the driving pulley 313 and the driven pulley 312 are sprockets.

[0046] It should be noted that U-shaped grooves are provided on both ends of the cover 31 corresponding to the rotating shaft 310, and the two ends of the cover are fitted onto the rotating shaft through the U-shaped grooves. The overlapping plate 333 on the cover overlaps with the moving edge plate 384.

[0047] Understandably, the inner side of the hopper 35 is connected to the inner side of the cover 31. The tea leaves in the hopper can fall into the space between the rotating drum and the cover.

[0048] like Figure 1 As shown, to facilitate control of the tea leaves falling from the hopper 35 into the space between the rotating drum and the lid, a feed pipe 37 and a feed control valve 36 are added. One end of the feed pipe 37 is connected to the inner side of the lid 31, and the other end is connected to the hopper 35 via the feed control valve 36. When the feed control valve 36 is open, the tea leaves in the hopper fall into the space between the rotating drum and the lid. When the feed control valve 36 is closed, the tea leaves in the hopper stop falling into the space between the rotating drum and the lid. It can be understood that the amount of tea leaves falling can be adjusted by the degree of opening of the feed control valve 36.

[0049] One structure of the feed control valve 36 includes a first valve plate, a second valve plate, a gasket plate, and a slide plate. The first and second valve plates have corresponding through holes. The first valve plate is connected to the discharge port at the bottom of the hopper, and the second valve plate is connected to the feed pipe. Two gasket plates are installed parallel to each other between the first and second valve plates, forming a through groove between the two gasket plates and the first and second valve plates. The slide plate is movably inserted into the through groove. When the slide plate is inserted into the through groove to block the discharge port, the tea leaves in the hopper stop falling. Pulling out the slide plate connects the discharge port to the feed pipe, and the tea leaves fall from the discharge hopper into the feed pipe.

[0050] It should be noted that the gasket is placed along the edges of the first valve plate and the second valve plate. The gasket, the first valve plate, and the second valve plate can be fixedly connected by multiple bolts.

[0051] Another configuration for the feed control valve 36 is a gate valve. Furthermore, the feed control valve can be an electrically operated gate valve.

[0052] While supporting the installation of the rotating drum, the rotary drum adjusting component 328 can also adjust the interval between the rotating drum and the multi-stage screens, thereby adjusting the interval between the multiple grades of crushing parts and the multi-stage screens.

[0053] The screen spacing adjustment component 330 is used to adjust the interval between the multi-stage screen and the rotating drum, thereby adjusting the spacing between the multi-stage screen and the multiple grades of grinding components, which can grind tea into broken tea and powdered tea with different particle sizes. For example... Figure 1-3 As shown, the screen spacing adjustment device can be installed in quantities of 1, 2, or 3. Of course, an appropriate number of screen spacing adjustment devices can also be installed according to the length of the multi-stage screen.

[0054] The locking mechanism 329 is used to lock and fix the overlapping plate 333 and the moving side plate to the support frame 316. When the locking mechanism is released, the overlapping plate can be separated from the moving side plate, and the cover 31 can be opened. When the locking mechanism is in the locked state, it locks and fixes the overlapping plate 333 and the moving side plate 384 to the support frame 316. It is understood that the number of locking mechanisms can be 2, 3, 4, 5, or 6, etc. Of course, an appropriate number of locking mechanisms can be installed according to the length of the cover.

[0055] A structure for a graded crushing component is given. The graded crushing component includes a first-stage crushing component 33, a second-stage crushing component 34, and a third-stage crushing component 331. The third-stage crushing component 331, the second-stage crushing component 34, and the first-stage crushing component 33 are distributed longitudinally on the rotating drum 32. The third-stage crushing component 331 corresponds to the hopper 35.

[0056] The multiple levels of crushing elements on the rotating drum 32 correspond to a multi-stage screen. The multi-stage screen may include a first-stage screen 383, a second-stage screen 382, ​​and a third-stage screen 381. The third-stage screen 381 corresponds to the third-stage crushing element 331. The second-stage screen 382 corresponds to the second-stage crushing element 34. The first-stage screen 383 corresponds to the third-stage crushing element 33.

[0057] It should be noted that the third-stage pulverizer is used as the starting point for pulverization. The third-stage sieve can filter out powder and fine tea fragments mixed in with the tea leaves. Understandably, the highest pulverization level corresponds to the hopper and is used as the starting point for pulverization.

[0058] like Figure 1-3 As shown, the partition 323 separates adjacent screens to prevent tea leaves, broken tea leaves, and powder from adjacent screens from mixing with each other.

[0059] A third-stage outlet 318 is formed between the third-stage screen 381, the partition 323 and the guide plate 317. The third-stage outlet 318 is equipped with a third-stage unloading component 319, which collects the material discharged from the third-stage outlet.

[0060] A second-stage outlet 321 is formed between the second-stage screen 382, ​​the partition 323 and the guide plate 317. The second-stage outlet 321 is equipped with a second-stage unloading component 322, which collects the material discharged from the second-stage outlet.

[0061] The first-stage outlet 324 is formed between the first-stage screen 383, the partition 323 and the guide plate 317. The first-stage outlet 324 is equipped with a first-stage unloading component 325, which collects the material discharged from the first-stage outlet.

[0062] The sealing plate 332, which is away from the hopper 35, has a zero-level outlet 334, and the zero-level outlet 334 is equipped with a zero-level unloading component 335.

[0063] It should be noted that the particle size of the tea leaves screened at the third, second, first, and zeroth stages increases sequentially. It is understandable that this is not limited to four stages; multiple stages can be set according to production needs.

[0064] The mesh size of the third-stage sieve can be 80 to 120 mesh. Selectable mesh sizes include 80, 90, 100, 110, or 120 mesh.

[0065] The mesh size of the second-stage sieve can be 30 to 50 mesh. Selectable mesh sizes include 30, 40, or 50 mesh.

[0066] The mesh size of the first-stage sieve can be 15 to 25 mesh. Selectable mesh sizes include 15, 20, or 25 mesh.

[0067] It is understandable that the third-stage, second-stage, and first-stage screens are not limited to the mesh sizes listed above; appropriate mesh sizes can be selected according to production needs.

[0068] like Figure 1 , 2 As shown, this is one structure of the third-stage crusher. The third-stage crusher 331 is spirally mounted on the rotating drum 32. The spiral structure of the third-stage crusher can both crush tea leaves and propel the material on the multi-stage screen.

[0069] It should be noted that the third-stage crushing component can be a ribbon-type spiral blade. The thickness of the spiral blade can be 10–20 mm, with selectable thicknesses including 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, or 20 mm. The width of the spiral blade can also be 10–20 mm, with selectable widths including 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, or 20 mm.

[0070] like Figure 1 , 2As shown, the second-stage crushing component 34 includes multiple second-stage crushing rods, which are circumferentially distributed at intervals on the circumferential surface of the rotating drum 32. Each second-stage crushing rod intersects the axis of the rotating drum 32, and the included angle formed by the intersection is α, where 0 < α ≤ 30°. The included angle α can be selected from 5°, 10°, 15°, 20°, 25°, or 30°, etc.

[0071] When multiple secondary crushing rods are installed along the circumference of the rotating drum, they form a spiral-like structure. While crushing the tea leaves, the multiple secondary crushing rods push the material on the multi-stage screen to move.

[0072] like Figure 1 , 2 As shown, the first-stage crushing component 33 includes multiple first-stage crushing rods, which are circumferentially distributed at intervals on the circumferential surface of the rotating drum 32. Each first-stage crushing rod intersects the axis of the rotating drum 32, and the included angle formed by the intersection is β, where 5°≤β≤50°. The included angle β can be selected from 5°, 10°, 15°, 20°, 25°, 30°, 35°, 40°, 45°, or 50°, etc.

[0073] The first-stage and second-stage crushing rods are intersecting on the rotating drum, and are also staggered.

[0074] The height of the first-stage crushing rod and the second-stage crushing rod can be 10-20mm, and the selectable heights can be 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm or 20mm, etc.

[0075] The width of the first-stage crusher and the second-stage crusher can be 10-20mm. Optional widths include 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, or 20mm.

[0076] It should be noted that the rotating drum features a spiral-shaped third-stage crusher, a long-rod-shaped second-stage crusher, and a short-rod-shaped first-stage crusher, arranged sequentially from the hopper towards the zero-stage guide. The spiral-shaped blades evenly distribute the tea leaves falling from the hopper while propelling them forward, preventing localized overload, clogging, and improving crushing efficiency. The long-rod-shaped second-stage crusher and the short-rod-shaped third-stage crusher further disperse the tea leaves, increasing contact between the tea leaves and the graded crushers and multi-stage screens, resulting in more uniform crushing and faster crushing speed. Understandably, the graded crushers of this invention improve crushing efficiency and uniformity, reduce clogging and energy consumption, extend equipment life, and improve product quality.

[0077] like Figure 1As shown, the discharged broken tea leaves and tea powder can be conveyed by conveyor 320. Each of the first-stage outlet 324, the second-stage outlet 321, and the third-stage outlet 318 can be equipped with a conveyor 320. Alternatively, the first-stage outlet 324, the second-stage outlet 321, and the third-stage outlet 318 can share a single conveyor. That is, the conveyor belt is aligned with the first-stage outlet 324, the second-stage outlet 321, and the third-stage outlet 318, and the tea materials discharged from the first-stage outlet 324, the second-stage outlet 321, and the third-stage outlet 318 are conveyed in a straight line on the conveyor belt, spaced apart from each other, without interference.

[0078] In some alternative embodiments, one structure for the rotary drum adjusting element is provided. For example... Figure 4 As shown, the rotary drum adjusting component 328 includes a support plate 3283, a first limiting plate 3285, a second bolt 3282, a second limiting plate 3287, and a first bolt 3286. One end of the support plate 3283 is hinged to the support frame 316, and the other end extends downward at an incline; the first limiting plate 3285 is connected to the other end of the support plate 3283; the second bolt 3282 is threaded through the first limiting plate 3285; the second limiting plate 3287 is installed on the first limiting plate 3285 and extends downward, and the second limiting plate 3287 has an arc-shaped adjusting groove 32871; the first bolt 3286 passes through the adjusting groove 32871; the bearing seat 3284 is installed on the support plate 3283 and is used to support and install the rotating shaft 310.

[0079] like Figure 1-3 As shown, the support plate 3283 is installed at an angle on the support frame 316.

[0080] The second bolt 3282 is threaded through the first limiting plate 3285 and threadedly connected to the support frame 316. The second limiting plate 3285 is installed on the side of the first limiting plate, and the first bolt 3286 is threaded through the adjusting groove 32871 and threadedly connected to the support frame 316.

[0081] The first limiting plate 3285, the second bolt 3282, the second limiting plate 3287, and the first bolt 3286 work together to fix the support plate 3283 to the support frame 316.

[0082] The working principle of the adjustable drum: Loosen the second bolt 3282 from the support frame 316, then loosen the first bolt 3286. At this point, the first limiting plate 3285, the second limiting plate 3287, and the support plate 3283 can all move. This allows the adjustable drum 32 to move relative to the multi-stage screen, thus adjusting the drum. After adjusting to the desired interval, tighten the first bolt 3286 and the second bolt 3282 to secure it.

[0083] It should be noted that when adjusting the distance between the rotating drum and the multi-stage screen, the distance between the rotating drum 32 and the multi-stage screen is adjusted. When the support plate 3283 is swung downwards, the distance between the rotating drum 32 and the multi-stage screen decreases. When the support plate 3283 is swung upwards, the distance between the rotating drum 32 and the multi-stage screen increases. Understandably, when the distance between the rotating drum and the multi-stage screen changes, the distance between the multiple grade grinding components and the multi-stage screen also changes. A smaller distance between the grade grinding components and the multi-stage screen results in smaller tea powder or broken tea particles. A larger distance between the grade grinding components and the multi-stage screen results in larger tea powder or broken tea particles.

[0084] A hinge connection structure for the support plate 3283 is provided, which includes a bushing 3281, a support base 39, and a support shaft 391. The support plate 3283 is provided with a bushing 3281, which has a shaft hole 32811. The support base 39 is provided with a support shaft 391 and is installed on the support frame 316. The support shaft 391 passes through the shaft hole 32811.

[0085] The support shaft 391 can rotate relative to the support base 39, and the support plate 3283 can swing relative to the support base 39 via the support shaft 391.

[0086] The adjusting groove 32871 has an arc-shaped structure, which corresponds to the arc-shaped trajectory of the support plate's swing. Therefore, when the support plate needs to swing, the first bolt 3286 and the second limiting plate 3287 do not obstruct the swing of the support plate.

[0087] In some alternative embodiments, one structure for the screen adjustment element is provided. For example... Figure 6 As shown, the screen adjustment component 330 includes a base plate 3305, a threaded cylinder 3303, a retaining ring 3304, a limiting boss 3306, and a push-pull screw 3302. One end of the base plate 3305 is mounted on a support frame 316, and the other end extends outward relative to the support frame 316 and connects to a vertical plate 3307. The vertical plate 3307 has a U-shaped groove 33071. The threaded cylinder 3303 passes through the U-shaped groove 33071. The retaining ring 3304 is mounted on one end of the threaded cylinder 3303. The limiting boss 3306 is mounted on the other end of the threaded cylinder 3303. The push-pull screw 3302 passes through the limiting boss 3306, the threaded cylinder 3303, and the retaining ring 3304 in sequence, and is threadedly connected to the threaded cylinder 3303.

[0088] The threaded cylinder 3303 is placed in the U-shaped groove 33071, with a limiting boss 3306 and a retaining ring 3304 at each end. The limiting boss 3306 and the retaining ring 3304 confine the threaded cylinder 3303 to the vertical surface of the U-shaped groove 33071. That is, the threaded cylinder 3303 is clamped to the vertical plate 3307 in its longitudinal direction by the limiting boss 3306 and the retaining ring 3304.

[0089] To facilitate the turning of the threaded cylinder 3303, a handle 3301 is added, which is connected to the limiting boss 3306. Turning the handle 3301 causes the limiting boss 3306 to rotate, which in turn causes the threaded cylinder 3303 and the retaining ring 3304 to rotate. The limiting boss 3306 and the retaining ring 3304 prevent the threaded cylinder from moving relative to the vertical plate. The threaded cylinder 3303 is threadedly connected to the push-pull screw 3302, which moves relative to the threaded cylinder 3303. The push-pull screw 3302 is connected to the moving side plate 384, which in turn moves the moving side plate 384. The moving side plate 384 then moves the multi-stage screen, thus adjusting the distance between the multi-stage screen and the rotating drum. This allows for adjustment of the distance between the graded pulverizing parts on the rotating drum and the multi-stage screen, thereby changing the particle size of the tea powder.

[0090] In some alternative embodiments, one structure of the locking mechanism is provided. The locking mechanism 329 includes a swing rod 3295, a support sleeve 3297, and a support screw 3291. Both ends of the swing rod 3295 are bent, with a threaded sleeve 3294 installed at one end and a rotating shaft 3296 installed at the other end; the support sleeve 3297 is sleeved on the rotating shaft 3296 and installed on the support frame 316; the support screw 3291 is bolted through the threaded sleeve 3294.

[0091] The two ends of the swing rod 3295 are bent to facilitate the swing rod to swing and engage between the overlapping plate and the moving edge plate.

[0092] The pivot 3296 can rotate relative to the support sleeve 3297, and the swing rod 3295 swings relative to the support sleeve 3297 via the pivot 3296.

[0093] The support screw 3291 is threadedly connected to the threaded sleeve 3294. Turning the support screw clockwise screws it into the threaded sleeve. Turning the support screw counterclockwise screws it out of the threaded sleeve.

[0094] During operation, the cover 31 is fastened onto the rotating cylinder 32, the overlapping plate 333 overlaps the moving side plate 384, and the driving swing rod 3295 swings and engages with the overlapping plate and the moving side plate. The threaded sleeve is perpendicular to the overlapping plate 333. When the support screw 3291 is turned, the support screw 3291 screws into the threaded sleeve 3294 and moves towards the overlapping plate 333. When the support screw is turned until it is tightened against the overlapping plate, the support screw tightens and fixes the overlapping plate and the moving side plate to the support frame 316. The locking mechanism fixes the cover to the support frame.

[0095] When the cover needs to be opened, loosen the support screw 3295. The support screw 3295 will disengage from the overlapping plate 333. Push the swing rod 3295, and the support screw and threaded sleeve will swing away from the overlapping plate, releasing the locking state of the locking mechanism, and the cover can be opened.

[0096] A drive structure for the support screw is provided, which adds a lever 3292 and an anti-detachment plate 3293. The lever 3292 passes through the end of the support screw 3291 away from the threaded sleeve 3294, and anti-detachment plates 3293 are installed at both ends.

[0097] Both ends of the lever are equipped with anti-detachment plates to prevent the lever from separating from the support screw.

[0098] One structure for the anti-detachment plate can be a circular plate. Understandably, the diameter of the circular plate is larger than the diameter of the through hole on the support screw used to pass the lever. The circular plate prevents the lever from detaching from the support screw.

[0099] like Figure 1-3 As shown, a longitudinal support member 326 and a vertical support 327 are added to the support frame 316. Both ends of the longitudinal support member 326 are mounted to the support frame 316 via the vertical support 327. A gap is formed between the bottom of the longitudinal support member 326 and the support frame 316, providing space for the swing rod 3295 to swing downwards. A support sleeve 3297 is mounted on the longitudinal support member 326.

[0100] According to the above embodiments, the working principle of this utility model is as follows:

[0101] The tea leaves to be crushed are placed into the hopper 35. The tea leaves enter the space formed by the cover 31, the rotating drum 32 and the multi-stage screen through the hopper 35. The third-stage crushing component 331 evenly distributes the falling tea leaves, pushes them forward and crushes them. The third-stage crushing component squeezes the tea leaves onto the third-stage screen 381 to achieve the grinding and crushing of the tea leaves. The crushed powder is filtered through the third-stage screen and falls into the guide plate 317. It then falls from the third-stage outlet 318 into the third-stage discharge component 319. The third-stage discharge component 319 guides the tea powder outward and discharges it.

[0102] The third-stage crusher 331 pushes the tea material to the second-stage crusher 34. The second-stage crusher further disperses and distributes the pushed tea material and pushes it back to the first-stage crusher. The second-stage crusher 34 squeezes the tea material onto the second-stage screen 382 to grind and cut it into the first type of broken tea. The first type of broken tea is filtered through the second-stage screen 382 and falls into the guide plate 317. The guide plate 317 guides the first type of broken tea to the second-stage outlet 321. The second-stage outlet 321 unloads the first type of broken tea into the second-stage unloading member 322. The second unloading member 322 discharges the first type of broken tea outward.

[0103] The second-stage crusher 34 pushes the tea material to the first-stage crusher 33. The first-stage crusher 33 further disperses and distributes the tea material and pushes it towards the zero-stage outlet 334. The first-stage crusher 33 squeezes the tea material against the first-stage screen 383 to grind and cut it into a second type of broken tea. The first-stage screen 383 filters out the second type of broken tea, which falls into the guide plate. The guide plate guides the second type of broken tea to the first-stage outlet 324. The first-stage outlet 324 introduces the second type of broken tea into the first unloading component 325, which discharges the second type of broken tea outward.

[0104] The first-stage crusher 33 pushes the remaining tea material into the zero-stage outlet 334 opened on the sealing plate 332. The tea material falls into the zero-stage unloading component 335 through the zero-stage outlet 334. The zero-stage unloading component 335 discharges the remaining tea material, which is the tea stem, outward.

[0105] The distance between the rotating drum and the multi-stage screen can be adjusted using the rotating drum adjustment component and the screen adjustment component, thereby producing broken tea and tea powder of corresponding particle sizes. When it is necessary to adjust the multi-stage screen using the screen adjustment component, the locking mechanism on the cover can be released first, and the moving side plate 384 can be released from its pressing state. This allows the screen adjustment component to push and pull the moving side plate to adjust the distance between the multi-stage screen and the rotating drum. Then, the locking mechanism can be locked onto the cover.

[0106] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, any obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A pulverizing device for tea leaf classifying, characterized by: Comprising Multi-stage net (38), the multi-stage net (38) includes fixed edge plate (385), the moving edge plate (384) and the multi-stage screen, the multi-stage screen is downward concave arc net structure, one side is connected with fixed edge plate (385), the other side is connected with moving edge plate (384), the fixed edge plate (385) is fixedly installed on one side of support frame (316), the moving edge plate (384) is hinged to the other side of support frame (316); End plate (332), both ends of the multi-stage screen are respectively fitted with an end plate (332), and the end plate (332) is installed on the support frame (316); Rotating drum (32), both ends of the rotating drum (32) are provided with rotating shafts (310) and are partially inserted into the multi-stage screen, each rotating shaft (310) is installed on the support frame (316) through a rotating drum distance adjusting piece (328), and a plurality of level crushing pieces are installed on the longitudinal circumferential surface of the rotating drum (32) corresponding to the multi-stage screen; Screen distance adjusting piece (330), one end of the screen distance adjusting piece (330) is installed on the support frame (316), and the other end is in transmission connection with the moving edge plate (384); Cover body (31), one end of the cover body (31) is hingedly connected with the support frame (316), and the other end is provided with a clamping plate (333), when the cover body (31) is hingedly connected with the rotating drum (32), the clamping plate (333) is clamped with the moving edge plate (384); Locking mechanism (329), one end of the locking mechanism (329) is hingedly connected with the support frame (316), and the other end is used for hingedly locking the clamping plate (333) and the moving edge plate (384) on the support frame (316); and Driving mechanism, the driving mechanism is in transmission connection with a rotating shaft (310).

2. A pulverizing device for classifying tea leaves according to claim 1, characterized in that: The rotating drum distance adjusting piece (328) comprises Support plate (3283), one end of the support plate (3283) is hingedly connected with the support frame (316), and the other end extends downwardly and obliquely; Bearing seat (3284), the bearing seat (3284) is installed on the support plate (3283); First limiting plate (3285), the first limiting plate (3285) is connected with the other end of the support plate (3283); Second bolt (3282), the second bolt (3282) is threaded through the first limiting plate (3285); Second limiting plate (3287), the second limiting plate (3287) is installed on the first limiting plate (3285) and extends downwardly, and the second limiting plate (3287) is provided with an arc-shaped adjusting groove (32871); and First bolt (3286), the first bolt (3286) is threaded through the adjusting groove (32871).

3. A pulverizing device for classifying tea leaves according to claim 2, characterized in that: It also comprises a shaft sleeve (3281), a support seat (39) and a support shaft (391), the support plate (3283) is provided with the shaft sleeve (3281), the shaft sleeve (3281) is provided with a shaft hole (32811), the support seat (39) is provided with the support shaft (391) and is installed on the support frame (316), and the support shaft (391) is threaded through the shaft hole (32811).

4. The tea leaf classifying and pulverizing device according to claim 1, wherein: The locking mechanism (329) comprises Swing rod (3295), both ends of the swing rod (3295) are bent structures, one end is provided with a threaded sleeve (3294), and the other end is provided with a rotating shaft (3296); A support sleeve (3297) is sleeved on the rotating shaft (3296) and is installed on the support frame (316); and A supporting screw rod (3291) is bolted through the threaded sleeve (3294).

5. The tea leaf classifying and pulverizing device according to claim 1, wherein: It also includes a material guide plate (317), a partition plate (323) and a hopper (35), the material guide plate (317) is installed at the bottom of the multi-stage screen, partition plates (323) are arranged between adjacent two screening screens on the outer side of the multi-stage screen, the partition plates (323) are connected with the material guide plate (317), and the hopper (35) is installed at one end of the cover (31); wherein the baffle (332) away from the hopper (35) is provided with a zeroth stage outlet (334).

6. The tea leaf classifying and pulverizing device according to claim 1, wherein: The screen distance adjusting piece (330) comprises A bottom plate (3305) is installed at one end of the support frame (316) and connected with a vertical plate (3307) which extends outward relative to the support frame (316) at the other end, and the vertical plate (3307) is provided with a U-shaped groove (33071); A threaded cylinder (3303) is arranged through the U-shaped groove (33071); A clamping ring (3304) is installed at one end of the threaded cylinder (3303); A limiting boss (3306) is installed at the other end of the threaded cylinder (3303); and A push-pull screw rod (3302) is arranged through the limiting boss (3306), the threaded cylinder (3303) and the clamping ring (3304) in sequence and is threadedly connected with the threaded cylinder (3303).

7. A comminution apparatus for classifying tea leaves according to any one of claims 1 to 6, characterised in that: The grade crushing piece comprises a first grade crushing piece (33), a second grade crushing piece (34) and a third grade crushing piece (331), the third grade crushing piece (331), the second grade crushing piece (34) and the first grade crushing piece (33) are sequentially arranged on the rotating drum (32) along the longitudinal direction, and the third grade crushing piece (331) corresponds to the hopper (35).

8. A pulverizing device for classifying tea leaves according to claim 7, characterized in that: The third grade crushing piece (331) is spirally installed on the rotating drum (32).

9. The tea leaf classifying and pulverizing device according to claim 7, wherein: The second grade crushing piece (34) comprises a plurality of second grade crushing rods which are circumferentially arranged on the circumferential surface of the rotating drum (32) at intervals, each second grade crushing rod intersects with the axis of the rotating drum (32), and the included angle formed by the intersection is α, 0 < α ≤ 30°.

10. The tea leaf classifying and pulverizing device according to claim 7, wherein: The first grade crushing piece (33) comprises a plurality of first grade crushing rods which are circumferentially arranged on the circumferential surface of the rotating drum (32) at intervals, each first grade crushing rod intersects with the axis of the rotating drum (32), and the included angle formed by the intersection is β, 5° ≤ β ≤ 50°.

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