Tea screening device

Abstract

The utility model discloses a tea screening device, which belongs to the technical field of screening machines and comprises a vibration seat, a plurality of layers of screening trays can be stacked on the vibration seat, a screen is arranged in each screening tray, a blanking port is arranged on the periphery of each screening tray, the periphery of each screening tray is fixedly connected with the corresponding screening tray, each screening tray is in a disc shape, and when the vibration seat is static, each screening tray is provided with a blanking port. The middle position of the screen protrudes in the direction away from the ground to be higher than the discharging opening, a traction strip used for guiding the middle position of the screen to elastically deform is arranged below the screen, and a positioning assembly used for positioning the position of the traction strip is arranged on the vibration base. According to the tea screening device, by changing the shape of the screens, the time for materials to fall on each screen for screening is prolonged, and the overall screening effect of a screening machine is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of screening machines, in particular to a tea screening device. Background Art

[0002] A screening machine is a machine that uses a heavy hammer to hit the screen frame at a high frequency, causing several layers of screens on the screen frame to vibrate simultaneously, driving the material put into the top screen to gradually fall down due to the different sizes of the screen meshes, thereby achieving graded processing of granular materials.

[0003] Existing screening machines usually use three screens for grading when screening tea leaves. Inferior products such as larger tea stems are at the top, and good products suitable for making tea remain in the middle screen. Fine tea fragments and tea powder usually fall on the lower screen and the screen frame supporting the screen. Through vibration, the tea leaves in each layer of the screen are gradually discharged through the drop opening opened on the side of the screen.

[0004] However, in the actual screening process, when the screening machine is screening the tea leaves in the top screen and the tea leaves that have just fallen to the lower layers, it is easy to directly guide the tea leaves on the current screen to fall directly through the drop port. As the number of layers increases, the situation becomes more obvious, which seriously affects the screening situation during tea grading.

[0005] In view of the above problems, a technical solution of a tea screening device is proposed. Utility Model Content

[0006] The utility model aims to solve the problems in the prior art and proposes a tea screening device.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a tea screening device includes a vibration seat, on which several layers of sieve plates can be stacked, a sieve is arranged in the sieve plate, and the sieve plate is provided with a drop-out opening on the peripheral side of the sieve, the peripheral side of the sieve is fixedly connected to the sieve plate, the sieve is in the shape of a disc, and when the vibration seat is stationary, the middle position of the sieve protrudes in a direction away from the ground to be higher than the drop-out opening, a traction bar for guiding the elastic deformation of the middle position of the sieve is arranged under the sieve, and a positioning component for positioning the position of the traction bar is arranged on the vibration seat.

[0008] The utility model is further configured as follows: the traction bar includes a main traction bar arranged in close contact with the screen, a pair of connecting sleeves are relatively arranged on the lower end surface of the screen along the axis of the screen, the main traction bar slides through the pair of connecting sleeves, the main traction bar is elastically bent and inclinedly arranged, one end of the main traction bar is slidably abutted against the connecting sleeve, the other end of the main traction bar slides out of the screen plate and is connected to the positioning assembly, and the main traction bar can be elastically reset.

[0009] The utility model is further configured as follows: the positioning assembly includes a positioning member, an operating member and a plurality of connecting rods, the positioning member is fixedly arranged on the peripheral side of the vibration seat, the positioning member is provided with a plurality of limiting rods, the connecting rod is formed with a circular hole for accommodating the limiting rod, one end of the connecting rod is connected to the main traction bar at the circular hole, and the other end of the connecting rod is connected to the operating member at the circular hole, when the operating member pushes the connecting rod to rotate around the limiting rod and approach the vibration seat, the connecting rod elastically straightens the main traction bar.

[0010] The utility model is further configured as follows: the operating member includes a base that can be positioned and rotated around the vibration seat and a guide plate arranged around the circumference of the base, the side of the guide plate fits the circumference of the connecting rod, and the cross-section of the guide plate is arc-shaped. As the base rotates around its axis, the guide plate pushes the end of the connecting rod away from the main traction bar to rotate toward the axis direction of the base.

[0011] The utility model is further configured as follows: a plurality of handles are fixedly arranged on the peripheral side of the base.

[0012] The utility model is further configured as follows: the main traction bar is formed with an abutment interface with an oblong cross section, and the cross section of the connecting rod sliding through the abutment interface is circular.

[0013] The utility model is further configured as follows: the traction bar also includes a plurality of secondary traction bars which are sequentially stacked and arranged below the main traction bar; the screen is also provided with a plurality of pairs of connecting sleeves for sliding through the secondary traction bars; the two ends of the secondary traction bars respectively slide against the side walls of the connecting sleeves; and the secondary traction bars can be elastically reset.

[0014] In summary, the utility model has the following beneficial effects: by changing the shape of the screen, the time for the material to be screened when it first falls on each screen is prolonged, thereby effectively improving the overall screening effect of the screening machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the screen plate, screen mesh, main traction bar and secondary traction bar of the utility model;

[0017] Figure 3 It is a partial schematic diagram of the vibration seat of the utility model, mainly showing the shape of the guide plate;

[0018] Figure 4 for Figure 1 Enlarged view of point A in the middle.

[0019] In the figure: 1. vibration seat; 2. sieve plate; 21. drop port; 3. sieve; 31. connecting sleeve; 4. operating part; 41. guide plate; 42. handle; 5. positioning part; 51. limit rod; 6. connecting rod; 61. round hole; 7. main traction bar; 71. abutment interface; 8. secondary traction bar. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. Obviously, the embodiments described are only some embodiments of the present invention, rather than all embodiments.

[0021] Tea screening device, such as Figure 1 as well as Figure 2 As shown, it includes a vibration seat 1. In this specific embodiment, the vibration seat 1 includes a frame, a weight, a vibrating body, a motor, a plurality of springs and a support plate. The motor is fixedly arranged on the frame, and the support frame is connected to the base through a plurality of springs. The motor and the vibrating body provide power for the weight to hammer the support plate at a high frequency. A plurality of sieve plates 2 can be stacked on the vibration seat 1. A sieve 3 is arranged in the sieve plate 2. The sieve plate 2 is provided with a drop opening 21 on the peripheral side of the sieve 3. The peripheral side of the sieve 3 is fixedly connected to the sieve plate 2.

[0022] Among them, the screen 3 is in the shape of a disc, and when the vibration seat 1 is stationary, the middle position of the screen 3 protrudes in the direction away from the ground to above the drop port 21, and a traction bar for guiding the elastic deformation of the middle position of the screen 3 is arranged below the screen 3, and a positioning component for positioning the traction bar is arranged on the vibration seat 1. The shape of the screen 3 is changed by controlling the traction bar in different time periods of the screening machine to restrict the material falling on the screen 3 from being close to the peripheral side of the sieve plate 2 and then falling from the drop port 21, that is, when the middle position of the screen 3 is convex, the material can be quickly vibrated to the peripheral side of the sieve plate 2, and when the middle position of the screen 3 is concave, although the material is vibrated and dispersed around the sieve plate 2, it does not contact the peripheral side of the sieve plate 2.

[0023] Practical effect: By changing the shape of the screen 3, the time when the material first falls on each screen 3 for screening is prolonged, effectively improving the overall screening effect of the screening machine.

[0024] like Figure 2 , Figure 3 as well as Figure 4 As shown, specifically, the traction bar includes a main traction bar 7 arranged in contact with the screen 3, and a pair of connecting sleeves 31 are relatively arranged on the lower end surface of the screen 3 along the axis of the screen 3. The main traction bar 7 slides through the pair of connecting sleeves 31, and the main traction bar 7 is elastically bent and arranged obliquely. One end of the main traction bar 7 slides and abuts against the connecting sleeve 31, and the other end of the main traction bar 7 slides out of the sieve plate 2 and is connected to the positioning component, and the main traction bar 7 can be elastically reset, wherein the positioning component includes a positioning member 5, an operating member 4 and a plurality of connecting rods 6, the positioning member 5 is fixedly arranged on the peripheral side of the vibration seat 1, and a plurality of limiting rods 51 are arranged on the positioning member 5, and the connecting rod 6 is formed with a circular hole 61 for accommodating the limiting rod 51, and one end of the connecting rod 6 is in the circular hole 61 and abuts against the main traction bar 7. The guide bar 7 is connected, and the other end of the connecting rod 6 in the circular hole 61 is connected to the operating member 4. When the operating member 4 pushes the connecting rod 6 to rotate around the limit rod 51 and approach the vibration seat 1, the connecting rod 6 elastically straightens the main traction bar 7. More specifically, the operating member 4 includes a base that can be positioned and rotated around the vibration seat 1 and a guide plate 41 arranged around the circumference of the base. The side of the guide plate 41 fits the circumference of the connecting rod 6. The cross-section of the guide plate 41 is arc-shaped. As the base rotates around its axis, the guide plate 41 pushes the end of the connecting rod 6 away from the main traction bar 7 to rotate toward the axis direction of the base. In this specific embodiment, according to the structural changes of similar triangles, it can be seen that the distance pushed by the guide plate 41 can pull the main traction bar 7 to move a longer distance outside the sieve plate 2.

[0025] In order to make it easier for the traction bar to guide the screen 3 to perform elastic deformation, the traction bar also includes a plurality of secondary traction bars 8 sequentially stacked and arranged below the main traction bar 7. The screen 3 is also provided with a plurality of pairs of connecting sleeves 31 for sliding through the secondary traction bars 8. The two ends of the secondary traction bars 8 are respectively slidably abutted against the side walls of the connecting sleeves 31, and the secondary traction bars 8 can be elastically reset.

[0026] In order to improve the convenience of installation, the main traction bar 7 is formed with an abutment interface 71 with an oblong cross-section. The connecting rod 6 slides through the abutment interface 71 with a circular cross-section. The sieve plate 2 can be placed first, and then the connecting rod 6 can be connected to the main traction bar 7 and the limiting rod 51. In order to improve the convenience of operation, a number of handles 42 are also fixedly provided on the surrounding side of the base.

[0027] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0028] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A tea screening device, comprising a vibration seat, on which a plurality of sieve plates can be stacked, wherein a sieve is arranged in the sieve plate, and a material drop opening is provided on the sieve around the sieve, characterized in that: The circumferential side of the screen is fixedly connected to the screen plate. The screen is in the shape of a circular disc, and when the vibration seat is stationary, the middle position of the screen protrudes away from the ground to above the drop port. A traction bar for guiding the elastic deformation of the middle position of the screen is arranged below the screen, and a positioning component for positioning the traction bar is arranged on the vibration seat.

2. The tea screening device according to claim 1, characterized in that: The traction bar includes a main traction bar arranged in close contact with the screen, and a pair of connecting sleeves are arranged relatively along the axis of the screen on the lower end surface of the screen. The main traction bar slides through the pair of connecting sleeves. The main traction bar is elastically bent and arranged obliquely. One end of the main traction bar is slidably abutted against the connecting sleeve, and the other end of the main traction bar slides out of the screen plate and is connected to the positioning assembly. The main traction bar can be elastically reset.

3. The tea screening device according to claim 2, characterized in that: The positioning assembly includes a positioning member, an operating member and a plurality of connecting rods. The positioning member is fixedly arranged on the peripheral side of the vibration seat. The positioning member is provided with a plurality of limiting rods. The connecting rod is formed with a circular hole for accommodating the limiting rod. One end of the connecting rod is connected to the main traction bar at the circular hole, and the other end of the connecting rod is connected to the operating member at the circular hole. When the operating member pushes the connecting rod to rotate around the limiting rod and approach the vibration seat, the connecting rod elastically straightens the main traction bar.

4. The tea screening device according to claim 3, characterized in that: The operating member includes a base that can be positioned and rotated around a vibration seat and a guide plate arranged around the circumference of the base. The side of the guide plate fits the circumference of the connecting rod, and the cross-section of the guide plate is an arc shape. As the base rotates around its axis, the guide plate pushes the end of the connecting rod away from the main traction bar to rotate toward the axis direction of the base.

5. The tea screening device according to claim 4, characterized in that: A plurality of handles are also fixedly arranged on the peripheral side of the base.

6. The tea screening device according to claim 3, characterized in that: The main traction bar is formed with an abutment interface with an oblong cross section, and the cross section of the connecting rod sliding through the abutment interface is circular.

7. The tea screening device according to claim 2, characterized in that: The traction bar also includes a plurality of secondary traction bars which are sequentially stacked and arranged below the main traction bar. The screen is also provided with a plurality of pairs of connecting sleeves for sliding through the secondary traction bars. The two ends of the secondary traction bars respectively slide against the side walls of the connecting sleeves, and the secondary traction bars can be elastically reset.

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