Multistage screening device for tea processing

Abstract

The utility model discloses a multistage screening device for tea processing, which comprises an upper screening frame, a lower screening frame and a screening box, the upper screening frame and the lower screening frame are both movably installed inside the screening box, the upper screening frame and the lower screening frame are arranged side by side up and down, the inner side of the upper screening frame and the inner side of the lower screening frame are both movably provided with movable screening nets, and the movable screening nets are arranged in the screening box. Three kinds of screening holes are distributed in the surface of the movable screen, one end of the upper screen frame and one end of the lower screen frame are movably connected through cooperation of a lifting ejector rod and a rotating shaft, the other end of the upper screen frame and the other end of the lower screen frame are in butt joint with the screening box through the rotating shaft, and the lower portion of the upper screen frame and the lower portion of the lower screen frame are movably provided with material cleaning rotary drums used for cleaning the screening holes. A side material nozzle is fixedly installed on the outer surface of the side edge of the material screening box. The tea leaf screening machine is provided with an adjustable multi-stage screening structure, corresponding adjustment can be conducted according to the thickness degree of tea leaves, multi-stage screening operation is completed, meanwhile, the tea leaf screening machine is provided with an auxiliary cleaning structure, the screening structure is prevented from being blocked, and the stability of the tea leaf screening machine is improved.

Description

Technical Field

[0001] The utility model belongs to the field of tea processing, in particular to a multi-stage screening device for tea processing. Background Art

[0002] There are many types of screening devices. The following are some common screening devices: Linear motion vibrating screen: This type of screen is named because the motion trajectory of the screen box is directional linear vibration, including double-axis inertial vibrating screen and resonance screen, circular motion vibrating screen: This type of screen includes single-axis inertial vibrating screen, self-centering vibrating screen and heavy-duty vibrating screen, etc. When choosing a suitable screening device, it is necessary to consider factors such as the particle size characteristics, shape, density, humidity and adhesion of the material, as well as the required screening efficiency, effective screening area and other factors.

[0003] Patent document CN108543711A discloses a tea screening machine, comprising a frame, a vibration device and a sieve plate, wherein: an air bag is arranged between the vibration device and the sieve plate, the air bag is provided with a first opening which can be opened inwardly and a second opening which can be opened outwardly, a first collecting box is arranged on one side of the frame, the first collecting box is provided with a feeding port connected to the second opening, the feeding port is hinged with a sieve which can be opened inwardly; an upwardly movable cleaning plate is arranged on the frame, a cleaning rod is arranged on the upper surface of the cleaning plate, the cleaning rod is arranged opposite to the sieve hole of the sieve plate; a connecting rod is also arranged on the frame, the middle part of the connecting rod is hinged to the frame, and one end of the connecting rod is hinged to the first collecting box.

[0004] Traditional tea screening machines have certain shortcomings when in use. Traditional tea screening machines adopt a single-stage screening structure design, so that they can only complete single-weight screening operations of tea during screening operations. At the same time, they cannot make corresponding screening adjustments according to the coarseness of the tea, which reduces their screening effects. Secondly, when the tea screening machine is in use, it is affected by tea residues, which makes the filter structure of the tea screening machine prone to blockage, requiring manual cleaning operations regularly, which reduces the stability of the tea screening machine when in use. Utility Model Content

[0005] The problem solved by the utility model is:

[0006] 1. The traditional tea screening machine adopts a single-stage screening structure design, which makes it only able to complete the single-weight screening operation of tea during screening operation. At the same time, it cannot make corresponding screening adjustments according to the coarseness of the tea, which reduces its screening effect;

[0007] 2. Secondly, when the tea screening machine is in use, it is affected by the tea residue, which makes the filter structure of the tea screening machine prone to blockage, requiring manual cleaning operations regularly, which reduces the stability of the tea screening machine during use.

[0008] The purpose of the utility model can be achieved through the following technical solutions:

[0009] A multi-stage screening device for tea processing comprises an upper screen frame, a lower screen frame and a screening box, wherein the upper screen frame and the lower screen frame are both movably mounted inside the screening box, and are arranged side by side up and down, and movable screens are movably mounted on the inner sides of the upper screen frame and the lower screen frame, and three types of screening holes are distributed on the surface of the movable screens, and one end of the upper screen frame and the lower screen frame are movably connected through a lifting top rod and a rotating shaft, and the other ends of the upper screen frame and the lower screen frame are connected to the screening box through a rotating shaft, and a cleaning drum for cleaning the screening holes is movably mounted on the lower parts of the upper screen frame and the lower screen frame, and a side material nozzle is fixedly mounted on the side outer surface of the screening box.

[0010] As a further technical solution of the utility model, a motor is arranged at the lower part of the lifting push rod, and the lifting push rod and the motor are connected by a crankshaft transmission. By starting the motor, the motor drives the lifting push rod by the crankshaft, so that the lifting push rod drives the upper screen frame and the lower screen frame to vibrate reciprocatingly.

[0011] As a further technical solution of the utility model, a first rotating rod is movably installed at one end of the mobile screen, and a second rotating rod is movably installed at the other end of the mobile screen. By rotating the first rotating rod and the second rotating rod, the winding of the two ends of the mobile screen can be controlled to realize the adjustment operation of the position of the screening holes of the mobile screen.

[0012] As a further technical solution of the utility model, the second rotating rod and the cleaning drum are driven by a chain and gears, and a brush head is fixedly installed on the outer surface of the side of the cleaning drum. When the second rotating rod rotates, the chain and gears form a synchronous driving structure, so that the second rotating rod synchronously drives the cleaning drum to rotate, and the brush head on the surface of the cleaning drum is used to clean the obstructions on the mobile screen.

[0013] As a further technical solution of the utility model, a main material nozzle is fixedly installed on the outer surface of one end of the screening box, and two groups of discharge troughs are arranged inside the main material nozzle. By utilizing the setting of the main material nozzle, the tea leaves screened by the upper screen frame and the lower screen frame can be discharged separately.

[0014] As a further technical solution of the utility model, a distribution box is arranged at the lower part of the main material nozzle, and a partition is fixedly installed in the middle part of the distribution box, and a slag discharge plate used in conjunction with the side material nozzle is arranged below the lower screen frame.

[0015] The beneficial effects of the utility model are as follows: the utility model provides a lower screen frame, an upper screen frame and a movable screen, so that when the multi-stage screening device for tea processing is used, it has an adjustable multi-stage screening structure, which can be adjusted accordingly according to the coarseness and fineness of the tea leaves, so as to complete the multi-stage screening operation. When in use, firstly, the first rotating rod or the second rotating rod is independently driven to rotate by the motor, and the winding of the two ends of the movable screen can be controlled by the rotation of the first rotating rod and the first rotating rod, so as to realize the adjustment operation of the screening hole position on the movable screen, and the screening hole of three kinds of mesh structure screening holes of large, medium and small sizes are arranged on the movable screen, and the screening hole adjustment operation is completed by adjusting the position of the movable screen, and the user starts the motor so that the motor drives the lifting push rod by the crankshaft, so that the lifting push rod drives the upper screen frame and the lower screen frame to vibrate reciprocatingly, and the upper screen frame and the lower screen frame perform two-stage screening operation on the tea leaves from top to bottom, and the screened tea leaves are discharged through the side material nozzle, so as to realize the multi-stage screening of the tea leaves;

[0016] By arranging a cleaning drum, when the multi-stage screening device for tea processing is used, the use of the mobile screen is optimized, so that the lower part of the mobile screen has a synchronous cleaning structure to avoid blockage. During operation, when the second rotating rod rotates, a synchronous driving structure is formed by a chain and a gear, so that the second rotating rod synchronously drives the cleaning drum to rotate, and the brush head on the surface of the cleaning drum is used to clean the blockage on the mobile screen, thereby improving its screening stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 It is the overall structural diagram of the mobile screen in the utility model;

[0020] Figure 3 It is a planar structural diagram of the upper screen frame and the lower screen frame in the utility model.

[0021] In the figure: 1. Side material nozzle; 2. Material distribution box; 3. Main material nozzle; 4. Mobile screen; 5. Upper screen frame; 6. Lifting top rod; 7. Screen box; 8. First rotating rod; 9. Second rotating rod; 10. Chain; 11. Cleaning drum; 12. Brush head; 13. Lower screen frame; 14. Motor; 15. Crankshaft; 16. Slag discharge plate. DETAILED DESCRIPTION

[0022] The technical solution of the utility model will be described clearly and completely in conjunction with the embodiments below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] like Figure 1-3 As shown, a multi-stage screening device for tea processing comprises an upper screen frame 5, a lower screen frame 13 and a screening box 7, wherein the upper screen frame 5 and the lower screen frame 13 are movably mounted inside the screening box 7, and the upper screen frame 5 and the lower screen frame 13 are arranged side by side up and down, and movable screens 4 are movably mounted on the inner sides of the upper screen frame 5 and the lower screen frame 13, and three types of screening holes are distributed on the surface of the movable screen 4, and one end of the upper screen frame 5 and the lower screen frame 13 are movably connected with a rotating shaft through a lifting push rod 6, and the other ends of the upper screen frame 5 and the lower screen frame 13 are connected to the screening box 7 through a rotating shaft, and a cleaning drum 11 for cleaning the screening holes is movably mounted on the lower parts of the upper screen frame 5 and the lower screen frame 13, and a side material nozzle 1 is fixedly mounted on the outer surface of the side edge of the screening box 7.

[0024] A motor 14 is provided at the lower part of the lifting push rod 6. The lifting push rod 6 and the motor 14 are connected by a crankshaft 15. By starting the motor 14, the motor 14 drives the lifting push rod 6 by the crankshaft 15, so that the lifting push rod 6 drives the upper screen frame 5 and the lower screen frame 13 to vibrate reciprocatingly.

[0025] A first rotating rod 8 is movably installed at one end of the mobile screen 4, and a second rotating rod 9 is movably installed at the other end of the mobile screen 4. By rotating the first rotating rod 8 and the second rotating rod 8, the winding of the two ends of the mobile screen 4 can be controlled to realize the adjustment operation of the position of the screening holes of the mobile screen 4.

[0026] The second rotating rod 9 and the cleaning drum 11 are driven by a chain 10 and gears. A brush head 12 is fixedly installed on the outer surface of the side of the cleaning drum 11. When the second rotating rod 9 rotates, the chain 10 and gears form a synchronous driving structure, so that the second rotating rod 9 synchronously drives the cleaning drum 11 to rotate, and the brush head 12 on the surface of the cleaning drum 11 is used to clean the blockages on the movable screen 4.

[0027] A main material nozzle 3 is fixedly mounted on the outer surface of one end of the screening box 7. Two groups of discharge troughs are arranged inside the main material nozzle 3. By using the arrangement of the main material nozzle 3, the tea leaves screened by the upper screening frame 5 and the lower screening frame 13 can be discharged separately.

[0028] A material distribution box 2 is provided at the lower part of the main material nozzle 3 , and a partition is fixedly installed in the middle part of the material distribution box 2 . A slag discharge pan 16 used in conjunction with the side material nozzle 1 is provided below the lower screen frame 13 .

[0029] The multi-stage screening device for tea processing is provided with a lower screen frame 13, an upper screen frame 5 and a movable screen 4. When the multi-stage screening device for tea processing is used, it has an adjustable multi-stage screening structure, which can be adjusted accordingly according to the coarseness of the tea leaves to complete the multi-stage screening operation. When in use, the first rotating rod 8 or the second rotating rod 9 is independently driven by the motor to rotate, and the rotation of the first rotating rod 8 and the second rotating rod 8 can control the winding of the two ends of the movable screen 4 to achieve the screening of the material on the movable screen 4. The adjustment operation of the hole position, the movable screen 4 is provided with three kinds of mesh structure screening holes of large, medium and small sizes. The adjustment operation of the screening holes is completed by adjusting the position of the movable screen 4. The user starts the motor 14 so that the motor 14 drives the lifting push rod 6 by the crankshaft 15, so that the lifting push rod 6 drives the upper screen frame 5 and the lower screen frame 13 to vibrate back and forth, and the upper screen frame 5 and the lower screen frame 13 perform two-stage screening operation on the tea leaves from top to bottom, and the screened tea leaves are discharged through the side material nozzle 1, so as to realize multi-stage screening of the tea leaves;

[0030] By providing a cleaning drum 11, when the multi-stage screening device for tea processing is used, the use of the mobile screen 4 is optimized, so that the lower part of the mobile screen 4 has a synchronous cleaning structure to avoid blockage. During operation, when the second rotating rod 9 rotates, the chain 10 cooperates with the gear to form a synchronous driving structure, so that the second rotating rod 9 synchronously drives the cleaning drum 11 to rotate, and the brush head 12 on the surface of the cleaning drum 11 is used to clean the blockage on the mobile screen 4, thereby improving its screening stability.

[0031] The above contents are merely examples and explanations of the structure of the utility model. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of the utility model.

Claims

1. A multi-stage screening device for tea processing, characterized in that: The invention comprises an upper screen frame (5), a lower screen frame (13) and a screen box (7), wherein the upper screen frame (5) and the lower screen frame (13) are both movably mounted inside the screen box (7), and the upper screen frame (5) and the lower screen frame (13) are arranged side by side in an upper and lower direction, and movable screens (4) are movably mounted inside the upper screen frame (5) and the lower screen frame (13), and three types of screen holes are distributed on the surface of the movable screens (4), and one end of the upper screen frame (5) and the lower screen frame (13) are movably connected to each other through a lifting push rod (6) and a rotating shaft, and the other ends of the upper screen frame (5) and the lower screen frame (13) are connected to the screen box (7) through a rotating shaft, and a cleaning drum (11) for cleaning the screen holes is movably mounted on the lower part of the upper screen frame (5) and the lower screen frame (13), and a side material nozzle (1) is fixedly mounted on the outer surface of the side edge of the screen box (7).

2. The multi-stage screening device for tea processing according to claim 1, characterized in that: A motor (14) is provided at the lower part of the lifting push rod (6), and the lifting push rod (6) and the motor (14) are connected in transmission via a crankshaft (15).

3. The multi-stage screening device for tea processing according to claim 1, characterized in that: A first rotating rod (8) is movably mounted on one end of the movable screen (4), and a second rotating rod (9) is movably mounted on the other end of the movable screen (4).

4. The multi-stage screening device for tea processing according to claim 3, characterized in that: The second rotating rod (9) and the cleaning rotating drum (11) are driven by a chain (10) in cooperation with gears, and a brush head (12) is fixedly mounted on the outer surface of the side edge of the cleaning rotating drum (11).

5. The multi-stage screening device for tea processing according to claim 1, characterized in that: A main material nozzle (3) is fixedly mounted on the outer surface of one end of the screening box (7), and two groups of discharge troughs are arranged inside the main material nozzle (3).

6. The multi-stage screening device for tea processing according to claim 5, characterized in that: A material distribution box (2) is arranged at the lower part of the main material nozzle (3), and a partition is fixedly installed in the middle part of the material distribution box (2). A slag discharge plate (16) used in conjunction with the side material nozzle (1) is arranged below the lower screen frame (13).

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