Rotary vibration type tea screening and dust removing device

Abstract

The utility model discloses a rotary vibration type tea screening dust removal device, which comprises a base, a plurality of layers of screen bodies, damping springs, a motor, a heavy hammer and a block mechanism, the screen bodies are sequentially arranged from top to bottom and jointly form a screen group arranged above the base, and the damping springs are arranged between the screen group and the base in a surrounding manner; the motor drives the screen group to vibrate through the heavy hammer and enables materials poured into the screen group to be discharged from the screen body on the layer or fall into the screen body on the next layer along the spiral motion trail, and the screen body on each layer is provided with a blocking mechanism at the discharge port. The blocking mechanism is provided with a guide plate extending from the periphery to the middle, the guide plate is arranged on the side, away from the feeding direction, of the discharging port, tea can be prevented from escaping in advance, and therefore the screening efficiency is effectively improved, and dust removal thoroughness is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of tea production equipment, and in particular to the technical field of tea impurity removal equipment. Background Technology

[0002] Vibrating screens, such as the self-cleaning mechanism of a vibrating screen and a vibrating screen with it disclosed in CN118926081A, a shock-absorbing vibrating screen disclosed in CN106733601A, and a new type of vibrating screen with a spiral screen surface disclosed in CN117181588A, are widely used as high-efficiency vibrating screening equipment for material grading and impurity removal in chemical, food and pharmaceutical fields. The working principle of a vibrating screen is that the three-dimensional composite vibration (horizontal, vertical and inclined directions) generated by the motor causes the material on the screen surface to generate a spiral motion trajectory under the coupling action of centrifugal force and vibration force, ultimately achieving stratified screening according to particle size differences.

[0003] In the tea processing industry, vibrating screens are often used in the tea screening and dust removal process. The screen structure of a traditional vibrating screen is usually a flat or slightly inclined structure. After the material is fed into the center of the screen, it can move in a diffusion spiral motion along the screen surface under the action of vibration. Among them, finer dust and other impurities can fall into the lower screen through the mesh, while larger tea leaves can move along the screen surface to the discharge port at the edge and be discharged.

[0004] However, in practical applications, due to the low bulk density and high fluidity of tea leaves, during high-speed vibration, some insufficiently screened tea leaves are easily moved to the outer edge of the screen surface prematurely by centrifugal force and discharged directly from the outlet, ultimately leading to reduced screening efficiency and incomplete dust removal. In particular, tea leaves near the outlet area are prone to deviating from the effective screening path due to inertia, forming a "short circuit" phenomenon. Based on this, there is an urgent need for an improved solution that can control the premature escape of tea leaves without changing the vibration characteristics or increasing energy consumption. Summary of the Invention

[0005] The purpose of this invention is to solve the problems in the existing technology by proposing a rotary vibration type tea screening and dust removal device, which can prevent tea leaves from escaping prematurely, thereby effectively improving screening efficiency and increasing the thoroughness of dust removal.

[0006] To achieve the above objectives, this utility model proposes a rotary vibration type tea screening and dust removal device, including a base, a screen body, shock-absorbing springs, a motor, a counterweight, and a baffle mechanism. Several layers of the screen body are arranged sequentially from top to bottom and together form a screen group installed above the base. Several shock-absorbing springs are arranged in a ring between the screen group and the base. The motor drives the screen group to vibrate through the counterweight and causes the material poured into the screen group to be discharged from the screen body of its current layer or fall into the next screen body along a spiral motion trajectory. Each layer of the screen body is equipped with a baffle mechanism at the discharge port. The baffle mechanism has a guide plate extending from the periphery to the center and the guide plate is located on the side of the discharge port away from the material inflow direction.

[0007] Preferably, the screen body includes a bottom screen, a ring frame, and a discharge channel. The ring frame is fixed to the bottom screen at the outer ring and together they surround to form a screening chamber. The discharge port is located above the ring frame. The discharge channel is fixed to the ring frame, with one end connected to the screening chamber through the discharge port and the other end connected to the outside.

[0008] Preferably, both the bottom mesh and the ring frame are provided with a first outer edge extending outward from the edge, and two adjacent screen bodies are detachably connected by a clamping ring that holds the first outer edge.

[0009] Preferably, the upper and lower sides of the screen assembly are respectively provided with dust covers with feed inlets and bottom frames fixed to the base. The bottom frame and the dust cover have a second outer edge and a third outer edge corresponding to the first outer edge. The screen body at the bottom is detachably connected to the bottom frame by a retaining ring that holds the first outer edge and the second outer edge. The screen body at the top is detachably connected to the dust cover by a retaining ring that holds the first outer edge and the third outer edge.

[0010] Preferably, the blocking mechanism also has a base block indirectly connected to the ring frame via a bracket and a base shaft rotatably connected to the base block. The guide plate is indirectly connected to the base shaft via a connecting rod. The base block is also threaded with a limiting bolt that can press against the base shaft to limit the rotation of the base shaft.

[0011] Preferably, an anti-slip pad is also provided between the limiting bolt and the base shaft.

[0012] Preferably, the guide plate and the bottom mesh are indirectly abutted by a spacer.

[0013] The beneficial effects of this utility model are:

[0014] 1) By installing a baffle mechanism at the discharge port of each layer of screen, the baffle mechanism can be set on the side of the discharge port away from the direction of incoming material and the guide plate extending from the outside to the middle to guide the material. This prevents the material from moving outwards too early or even being discharged directly from the discharge port instead of moving outwards along the spiral motion trajectory. This can effectively improve screening efficiency and increase the thoroughness of dust removal.

[0015] 2) By connecting the guide plate, connecting rod, base shaft, limit bolt and base block to form a blocking mechanism, the base shaft can be rotated freely after the limit bolt is loosened to adjust the tilt angle of the guide plate to meet different material guiding requirements. The limit bolt can also be used to press the base shaft with the limit bolt when the limit bolt is tightened to prevent the guide plate from continuing to rotate.

[0016] 3) By adding soft septa and anti-slip pads between the guide plate and the bottom mesh and between the limiting bolt and the base shaft, the septa can reduce material leakage, and the anti-slip pads can increase friction to improve the limiting stability of the limiting bolt on the base shaft.

[0017] The features and advantages of this utility model will be described in detail through embodiments and accompanying drawings. Attached Figure Description

[0018] Figure 1 This is a front view of the rotary vibration type tea screening and dust removal device of this utility model;

[0019] Figure 2 This is a top view of the sieve body and the baffle mechanism of the rotary vibrating tea screening and dust removal device during assembly.

[0020] Figure 3 This is a front view of the baffle mechanism of the rotary vibration type tea screening and dust removal device of this utility model;

[0021] In the diagram: 1-base, 2-screen body, 21-bottom mesh, 22-ring frame, 23-discharge channel, 24-first outer edge, 3-shock-absorbing spring, 4-motor, 5-weighted hammer, 6-dust cover, 7-binding ring, 8-gripping mechanism, 81-guide plate, 82-connecting rod, 83-base shaft, 84-limiting bolt, 85-anti-slip pad, 86-base block, 87-partition. Detailed Implementation

[0022] See Figure 1 , Figure 2 and Figure 3This utility model relates to a rotary vibration type tea screening and dust removal device, comprising a base 1, a screen body 2, shock-absorbing springs 3, a motor 4, a counterweight 5, and a baffle mechanism 8. Several layers of screen bodies 2 are arranged sequentially from top to bottom and together form a screen group installed above the base 1. Several shock-absorbing springs 3 are arranged in a ring between the screen group and the base 1. The motor 4 drives the screen group to vibrate through the counterweight 5, causing the material poured into the screen group to be discharged from the screen body 2 of its current layer or fall into the next screen body 2 along a spiral motion trajectory. Each layer of screen body 2 is equipped with a baffle mechanism 8 at the discharge port. The baffle mechanism 8 has a guide plate 81 extending from the periphery to the center, and the guide plate 81 is located on the side of the discharge port away from the material inflow direction.

[0023] The screen body 2 includes a bottom screen 21, a ring frame 22 and a discharge channel 23. The ring frame 22 is fixed together with the bottom screen 21 at the outer ring and together they surround to form a screening chamber. The discharge port is located above the ring frame 22. The discharge channel 23 is fixed to the ring frame 22 and one end of it is connected to the screening chamber through the discharge port, while the other end is connected to the outside.

[0024] Both the bottom mesh 21 and the ring frame 22 are provided with a first outer edge 24 extending outward from the edge, and the two adjacent screen bodies 2 are detachably connected by a binding ring 7 that holds the first outer edge 24.

[0025] The screen assembly is also provided with a dust cover 6 with a feed inlet on the upper and lower sides, and a bottom frame fixed to the base 1. The bottom frame and the dust cover 6 have a second outer edge and a third outer edge corresponding to the first outer edge 24, respectively. The screen body 2 at the bottom is detachably connected to the bottom frame by a retaining ring 7 that holds the first outer edge 24 and the second outer edge. The screen body 2 at the top is detachably connected to the dust cover 6 by a retaining ring 7 that holds the first outer edge 24 and the third outer edge.

[0026] The blocking mechanism 8 also has a base block 86 indirectly connected to the ring frame 22 via a bracket and a base shaft 83 rotatably connected to the base block 86. The guide plate 81 is indirectly connected to the base shaft 83 via a connecting rod 82. The base block 86 is also threaded with a limiting bolt 84 that can press against the base shaft 83 to limit the rotation of the base shaft 83. The bracket can also be detachably connected to the ring frame 22 via fasteners.

[0027] An anti-slip pad 85 is also provided between the limiting bolt 84 and the base shaft 83; wherein the anti-slip pad 85 can be fixed to the end of the screw of the limiting bolt 84.

[0028] The guide plate 81 and the bottom mesh 21 are indirectly abutted by a spacer 87; in addition, the spacer 87 can be fixed to the guide plate 81 by adhesive or fastener thread connection, so that it can be easily replaced when the wear is severe in the later stage.

[0029] The working process of this utility model:

[0030] In use, first pour the tea leaves to be screened into the screen group along the feed inlet, then start the motor 4 to drive the screen group to vibrate using the weight 5. Taking a screen body 2 with three layers (referred to as the first screening space, the second screening space, and the third screening space from top to bottom) as an example, under the action of vibration, large tea leaves will gradually move from the center to the outside along the spiral motion trajectory in the first screening space until they are discharged through the discharge channel 23, while small tea leaves and dust impurities will penetrate the bottom screen 21 and fall into the second screening space. Subsequently, small tea leaves will move outward along the spiral motion trajectory in the second screening space until they are discharged through the discharge channel 23, while dust impurities will penetrate the bottom screen 21 and fall into the third screening space. Finally, dust impurities will gradually move outward along the spiral motion trajectory in the third screening space until they are discharged through the discharge channel 23.

[0031] Before use, the tilt of the guide plate 81 of the grid mechanism 8 located in each layer of screen body 2 can be adjusted. Specifically, first rotate the base shaft 83 as required until the guide plate 81 rotates to the required orientation, and then tighten the limit bolt 84 until the limit bolt 84 presses against the base shaft 83 through the anti-slip pad 85 (making it difficult for the base shaft 83 to rotate).

[0032] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. A rotary-vibrating tea screening and dust removing device, characterized in that: The application relates to a vibrating screen, which comprises a base (1), a screen body (2), damping springs (3), a motor (4), a heavy hammer (5) and a blocking mechanism (8), a plurality of screen bodies (2) are arranged from top to bottom and jointly form a screen group which is installed above the base (1), a plurality of damping springs (3) are arranged around the screen group and the base (1), the motor (4) drives the screen group to vibrate through the heavy hammer (5) and makes materials poured into the screen group move along a spiral track and be discharged from a layer of the screen body (2) or fall into the next layer of the screen body (2), the blocking mechanism (8) is installed at a discharge port of each layer of the screen body (2), and the blocking mechanism (8) is provided with a guide plate (81) extending from the periphery to the middle part and arranged on the side of the discharge port away from the material feeding direction.

2. The rotary vibration type tea screening and dust removing device according to claim 1, characterized in that: The screen body (2) comprises a bottom net (21), a ring frame (22) and a discharge channel (23), the ring frame (22) is fixed with the bottom net (21) at the outer ring and jointly encloses a screening cavity, the discharge port is located above the ring frame (22), and the discharge channel (23) is fixed with the ring frame (22) and one end of the discharge channel (23) is connected to the screening cavity through the discharge port and the other end is connected to the outside.

3. The rotary vibration type tea screening and dust removing device according to claim 2, characterized in that: The bottom net (21) and the ring frame (22) are provided with first outer extension edges (24) extending outward from the edges, and two adjacent screen bodies (2) are detachably connected through a clamping ring (7) clamped outside the first outer extension edges (24).

4. The rotary vibration type tea screening and dust removing device according to claim 3, characterized in that: The upper and lower sides of the screen group are respectively provided with a dust cover (6) with a feeding port and a bottom frame fixed with the base (1), the bottom frame and the dust cover (6) are respectively provided with second outer extension edges and third outer extension edges corresponding to the first outer extension edges (24), the screen body (2) located at the lowermost position is detachably connected with the bottom frame through the clamping ring (7) clamped between the first outer extension edges (24) and the second outer extension edges, and the screen body (2) located at the uppermost position is detachably connected with the dust cover (6) through the clamping ring (7) clamped between the first outer extension edges (24) and the third outer extension edges.

5. The rotary vibration type tea screening and dust removing device according to any one of claims 2 to 4, characterized in that: The blocking mechanism (8) further comprises a base block (86) indirectly connected with the ring frame (22) through a support and a base shaft (83) rotatably connected with the base block (86), the guide plate (81) is indirectly connected with the base shaft (83) through a connecting rod (82), and the base block (86) is further screwed with a limiting bolt (84) which can tightly press the base shaft (83) to limit the rotation of the base shaft (83).

6. The rotary vibration type tea screening and dust removing device according to claim 5, characterized in that: A non-slip gasket (85) is arranged between the limiting bolt (84) and the base shaft (83).

7. The rotary vibration type tea screening and dust removing device according to claim 5, characterized in that: The guide plate (81) and the bottom net (21) are indirectly abutted through a spacer (87).

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