CN214347819U

CN214347819U - Automatic stifled sieve device that trembles of arranging of preventing of tealeaves

Info

Publication number: CN214347819U
Application number: CN202120146981.6U
Authority: CN
Inventors: 朱旭君; 王雷; 朱建一; 任太钰
Original assignee: Changzhou Jintan District Fudichun Tea Co ltd; Nanjing Agricultural University
Current assignee: Changzhou Jintan District Fudichun Tea Co ltd; Nanjing Agricultural University
Priority date: 2021-01-20
Filing date: 2021-01-20
Publication date: 2021-10-08
Anticipated expiration: 2031-01-20

Abstract

The invention discloses an automatic anti-blocking and blockage-removing sieve shaking device for tea leaves, which comprises a feeding device, a variable-frequency vibrating screen machine device, an automatic anti-blocking and blockage-removing device and a dust suction device. The automatic anti-blocking and blockage-removing device comprises a group of barriers which divide the upper screen surface and the lower screen surface into a plurality of areas, a group of marbles are placed in the barriers, and the marbles continuously hit the upper screen surface and the lower screen surface through the vibration of the screen bed. The invention can automatically prevent and remove blockage and has low noise and little environmental pollution.

Description

Automatic stifled sieve device that trembles of arranging of preventing of tealeaves

Technical Field

The invention relates to an automatic anti-blocking and blockage-removing sieve shaking device for tea, and belongs to the technical field of tea processing.

Background

A tea screening machine is one of important mechanical devices in tea refining and processing operation. The raw tea is classified according to length, size, thickness and weight, so as to be beneficial to blending.

At present, the screening machines used in tea factories mainly include a plane circular screen machine, a shaking screen machine, a roller circular screen machine, a floating screen machine and the like (the former two machines are particularly widely applied). The shaking screen machine can be divided into a horizontal shaking screen machine (also called a reciprocating shaking screen machine, generally called a shaking screen machine) and a vertical shaking screen machine (generally called a vibrating screen machine) according to the different vibration directions of the screen beds.

The outstanding problem of current tealeaves screening equipment in actual production:

the screening surface is rugged, and the screening surface blocks up the sieve seriously to lead to that screening efficiency is not high, and the wrong sieve rate is high moreover, and the net rate is low. Generally, the scraping and screening operation is required to be carried out manually in the screening process, and the problem of tea blockage is solved manually, so that the labor intensity is increased;

because the screening process needs the manual work to carry out the operation of scraping the sieve constantly in order to improve screening efficiency to screening machinery can not be sealed. In the screening process, tea dust is scattered to a refining workshop due to mechanical vibration, and the working environment is seriously polluted. At present, tea dust pollution is the first problem of environmental pollution of tea factories;

the mechanical noise of tea screening is high. Noise pollution directly affects the health of workers, mainly directly affects the auditory sense and nervous system of the workers.

Disclosure of Invention

The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides the automatic tea anti-blocking and blockage-removing shaking screen device which can automatically prevent and remove blockage and has low noise and little environmental pollution.

The technical scheme is as follows: in order to solve the technical problems, the automatic anti-blocking and blockage-removing shaking screen device for tea comprises a feeding device, a variable-frequency vibrating screen machine device, an automatic anti-blocking and blockage-removing device and a dust suction device;

the feeding device comprises a storage hopper 3, the storage hopper 3 is connected with one end of a traction device 4, and the other end of the traction device 4 is connected with a variable-frequency vibrating screen machine device;

the variable-frequency vibrating screen device comprises a vibrating feeding hopper 5 connected with a traction device 4, wherein the vibrating feeding hopper 5 can select an adjustable variable-frequency feeding device which can shake up and down in a reciprocating way; and the vibrating feeding hopper 5 can be additionally provided with a dust removal bag 17 to prevent the influence on the shaking efficiency caused by excessive tea dust generated in the shaking process. The vibrating feeding hopper 5 is connected with a sieve bed 12, the sieve bed 12 is obliquely arranged and comprises an upper sieve surface 9 and a lower sieve surface 8 which are arranged in parallel, and an automatic anti-blocking and blockage removing device is arranged between the upper sieve surface 9 and the lower sieve surface 8; the vibration exciter 11 is arranged at the lower part of the sieve bed 12, and the sieve bed is driven to vibrate by the vibration of the vibration exciter 11; the vibration exciter can select the centrifugal force generated by the rotation of the eccentric block as the vibration source, belongs to mechanical vibration excitation, and enables the sieve bed 12 to generate vertical vibration. The upper screen surface and the lower screen surface are thin metal punching screen plates, and the problem of screen mesh unevenness is solved. Circular punching holes are selected, and the circular punching holes are arranged in a shape like a Chinese character 'pin', so that the punching rate is increased, the screening area is increased, and the screening efficiency is improved. The upper part of each sieve pore is small, the lower part of each sieve pore is large, and each sieve pore is slightly tapered, so that the sieve blockage situation is reduced.

The automatic anti-blocking and blockage removing device comprises a group of barriers 20 which divide an upper screen surface 9 and a lower screen surface 8 into a plurality of areas, wherein a group of marbles with different sizes are placed in the barriers 20, and the marbles continuously hit the upper screen surface 9 and the lower screen surface 8 through the vibration of a screen bed; due to the arrangement of the barrier, the marbles can not fall into the bottom of the sieve bed completely under the action of gravity, and meanwhile, due to the shaking of the sieve bed, the marbles can be uniformly distributed in the barrier and continuously hit the upper sieve surface and the lower sieve surface. The marble is an elastic sphere with different density and different diameter, and the elastic sphere automatically bounces mainly by vibration. Under the state that the inclination exists, the marble can strike two layers of screen surfaces continuously in the vibration process. On one hand, the marbles can interrupt the tea blocking the exposed part in the sieve pores by the elasticity and the vibration force given by the vibrating sieve; on the other hand, marbles can be automatically dispersed on different area surfaces to hit the screen surface, the screen surface is made of thin steel plate materials and has certain elasticity, and the marbles hit and the screen bed vibrates to enable the screen surface to have certain amplitude, so that tea leaves blocked can jump. The selection of marbles with different densities and different diameters mainly considers that marbles arranged in different densities can obtain different exciting forces in the variable-frequency vibration process, so that different displacements can be generated, and different screen surface areas can be dispersedly hit. The selection of marbles of different diameters takes into account: when the pinball is hit, the area of the blind spot area is reduced, the pinball with the small diameter can hit more areas, the hitting speed of the pinball is high, the inertia force of the large pinball is high, and the shearing stress to the tea leaves is large when the pinball is hit. The number of the marbles and the diameter of the marbles are determined according to the actual situation of different tea in production practice.

The sieve bed 12 is provided with a group of tea outlets, and the bottom surface plate of the tea outlets is not higher than the sieve surface of the corresponding layer, so that the tea on the sieve surface can smoothly flow out from the corresponding tea outlets.

Furthermore, two ends of a traction device 4 are provided with a leaf storage groove 2, continuous flow conveying is adopted, the traction device 4 is driven by a driving device (1) arranged at the top end to move upwards to convey tea leaves, and fresh tea leaves can automatically fall into a quantitative leaf storage groove under the action of gravity; and the tea storage groove can accept tea, so that the tea is prevented from sliding downwards on the inclined traction device, namely the conveying belt.

The traction device 4 is driven by the driving device 1 arranged at the top end to move upwards to convey tea leaves. The drive device 1 is supported by a bracket 22. A traction device is selected for conveying tea leaves, automatic feeding is carried out, and then a small reciprocating shaking adjustable variable-frequency feeding device is added, so that the tea leaves can be automatically dispersed and arranged in the feeding device, and the tea leaves with moderate thickness enter a screen surface, so that the tea leaf screening effect and the production efficiency are improved.

Further, the sieve bed 12 is supported by the base frame 7, and the vibration isolation spring 10 is provided between the sieve bed 12 and the base frame 7.

Further, the tea outlet comprises a tea head outlet 6, a main tea outlet 14 and a tendon outlet 13; the tea head outlet 6 is arranged at the tail part of the upper sieve surface 9; a positive tea outlet 14 is arranged at the tail part of the lower sieve surface 8; the rib stalk outlet 13 is arranged at the bottom of the sieve bed 12.

Furthermore, dust removing bags are additionally arranged on the tea head outlet 6, the main tea outlet 14 and the tendon outlet 13.

Further, the dust suction means includes a closed dust removing device 15 provided at an upper portion of the sieve bed 12. The closed dust removal device is a shell which wraps the sieve bed, and can reduce the problem of tea dust pollution.

The working principle is as follows: put into storage hopper with tealeaves, along with draw gear's promotion, tealeaves can get into sieve bed through vibration feeding hopper, and through the vibration of sieve bed, the screening of tea process sifter flows through the export of tea, and positive tea is through the screening of sifter down, and through positive tea export outflow, the muscle stalk spills from the sieve mesh of sifter down, flows through muscle stalk export. When the sieve bed works, the upper sieve surface and the lower sieve surface vibrate at high frequency along the direction vertical to the sieve surface, tea leaves leave the sieve surface under the action of inertia force on the sieve surface, do throwing motion, fall down according to the trajectory of a parabola, repeat the process, continuously move forwards and sieve simultaneously. The finer stem and tea strips pass through the sieve surface to become tea at the bottom of the sieve, and the coarse tea strips cannot pass through the sieve surface to become sieve heads. In order to be more beneficial to screening operation, the output frequency of the vibration exciter is selected to be variable-frequency vibration output, the higher frequency can accelerate the screening speed of materials, and the automatic discharge of materials on the screen can also be promoted. When the amplitude is fixed, the frequency is changed, the inertia force is also changed, the motion rule is also obviously changed, different vibration frequencies can enable materials with different masses and different gravity points to be normally erected and screened in layers under a certain adaptive vibration frequency, and therefore the variable frequency vibration mode is used instead, the tea screening probability is increased, the screening efficiency is improved, the false screening rate is reduced, the screening rate is improved, and the noise decibel is reduced.

Has the advantages that: (1) the automatic blockage removing and preventing device solves the problems that the tea leaves block the sieve and need manual work to assist in removing the blockage in the sieving process. (2) The sieve plate material is used instead, so that the problem of concave-convex screen cloth is solved. (3) The invention changes a frequency conversion vibration mode, increases the tea sieving probability, improves the sieving efficiency, reduces the error sieving rate, improves the sieving net rate and reduces the noise decibel so that the tea sieving net rate accords with the sanitary limit value of the noise sound level of the industrial enterprise design sanitary standard to the working place. (4) The closed outer cover device adopted by the invention solves the problem of tea dust pollution of a refining workshop caused by a traditional tea screening machine, and further realizes the aim of cleaning the production environment.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the automatic anti-blocking and blockage-removing device of the invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

Examples

A sieve shaking device for automatically preventing and removing the blockage of tea comprises a feeding device, a variable-frequency vibrating screen machine device, an automatic blockage preventing and removing device and a dust suction device;

the variable-frequency vibrating screen device comprises a vibrating feeding hopper 5 connected with a traction device 4, wherein the vibrating feeding hopper 5 can select an adjustable variable-frequency feeding device which can shake in a reciprocating way; and the vibrating feeding hopper 5 can be additionally provided with a dust removal bag 17 to prevent the influence on the shaking efficiency caused by excessive tea dust generated in the shaking process. The vibrating feeding hopper 5 is connected with a sieve bed 12, the sieve bed 12 is obliquely arranged and comprises an upper sieve surface 9 and a lower sieve surface 8 which are arranged in parallel, and an automatic anti-blocking and blockage removing device is arranged between the upper sieve surface 9 and the lower sieve surface 8; the vibration exciter 11 is arranged at the lower part of the sieve bed 12, and the sieve bed is driven to vibrate by the vibration of the vibration exciter 11; the vibration exciter can select the centrifugal force generated by the rotation of the eccentric block as the vibration source, and belongs to mechanical vibration excitation. The upper and lower screen surfaces are thin metal punched screen plates, circular punched holes are selected and arranged in a shape like a Chinese character pin, and the screen holes are small in the upper part and large in the lower part and are slightly tapered.

The automatic anti-blocking and blockage removing device comprises a frame 18 and a group of barriers 20 which divide the upper screen surface 9 and the lower screen surface 8 into a plurality of areas, wherein a group of marbles with different sizes are placed in the barriers 20, and the marbles continuously hit the upper screen surface 9 and the lower screen surface 8 through the vibration of the sieve bed; due to the arrangement of the barrier, the marbles can not fall into the bottom of the sieve bed completely under the action of gravity, and meanwhile, due to the shaking of the sieve bed, the marbles can be uniformly distributed in the barrier and continuously hit the upper sieve surface and the lower sieve surface. The marble is an elastic sphere with different density and different diameter, and the elastic sphere automatically bounces mainly by vibration. Under the state that the inclination exists, the marble can strike two layers of screen surfaces continuously in the vibration process.

The sieve bed 12 is provided with a group of tea outlets, and the bottom surface plate of the tea outlets is not higher than the sieve surface of the corresponding layer, so that the tea on the sieve surface can smoothly flow out from the corresponding tea outlets. The two ends of the traction device 4 are provided with the leaf storage grooves 2, and the traction device 4 is driven by the driving device 1 arranged at the top end to move upwards to convey tea leaves. The drive device 1 is supported by a bracket 22. The sieve bed 12 is supported by the base frame 7, and the vibration isolation spring 10 is arranged between the sieve bed 12 and the base frame 7. The tea outlet comprises a tea head outlet 6, a main tea outlet 14 and a tendon outlet 13; the tea head outlet 6 is arranged at the tail part of the upper sieve surface 9; a positive tea outlet 14 is arranged at the tail part of the lower sieve surface 8; the rib stalk outlet 13 is arranged at the bottom of the sieve bed 12. Dust removal bags are additionally arranged on the tea head outlet 6, the tea straightening outlet 14 and the tendon outlet 13. The dust suction device comprises a closed dust removal device 15 arranged at the upper part of the sieve bed 12. The closed dust removal device is a shell which wraps the sieve bed, and can reduce the problem of tea dust pollution.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by using equivalent alternatives or equivalent variations fall within the scope of the present invention.

Claims

1. The utility model provides an automatic stifled row of preventing of tealeaves is blocked up trembles sieve device, includes loading attachment and frequency conversion shale shaker device, its characterized in that: the automatic anti-blocking and blockage-removing device and the dust suction device are also included;

the feeding device comprises a storage hopper (3), the storage hopper (3) is connected with one end of a traction device (4), and the other end of the traction device (4) is connected with a variable-frequency vibrating screen machine device;

the variable-frequency vibrating screen device comprises a vibrating feeding hopper (5) connected with a traction device (4), the vibrating feeding hopper (5) is connected with a screen bed (12), the screen bed (12) is obliquely arranged and comprises an upper screen surface (9) and a lower screen surface (8) which are arranged in parallel, and an automatic anti-blocking and blockage-removing device is arranged between the upper screen surface (9) and the lower screen surface (8); a vibration exciter (11) is arranged at the lower part of the sieve bed (12);

the automatic anti-blocking and blockage-removing device comprises a group of barriers (20) which divide an upper screen surface (9) and a lower screen surface (8) into a plurality of areas, wherein a group of marbles are placed in the barriers (20), and the marbles continuously hit the upper screen surface (9) and the lower screen surface (8) through vibration of a screen bed;

a group of tea outlets are arranged on the sieve bed (12).

2. The automatic anti-blocking and anti-blocking sieve shaking device for tea leaves as claimed in claim 1, wherein: the tea leaf conveying device is characterized in that leaf storage grooves (2) are formed in two ends of the traction device (4), and the traction device (4) is driven by the driving device (1) arranged at the top end to move upwards to convey tea leaves.

3. The automatic anti-blocking and anti-blocking sieve shaking device for tea leaves as claimed in claim 1, wherein: the sieve bed (12) is supported by the base frame (7), and a vibration isolation spring (10) is arranged between the sieve bed (12) and the base frame (7).

4. The automatic anti-blocking and anti-blocking sieve shaking device for tea leaves as claimed in claim 1, wherein: the tea outlet comprises a tea head outlet (6), a main tea outlet (14) and a tendon outlet (13);

the tea head outlet (6) is arranged at the tail part of the upper sieve surface (9); the positive tea outlet (14) is arranged at the tail part of the lower sieve surface (8); the rib stalk outlet (13) is arranged at the bottom of the sieve bed (12).

5. The automatic anti-blocking and anti-blocking sieve shaking device for tea leaves as claimed in claim 4, wherein: dust removal bags are additionally arranged on the tea head outlet (6), the main tea outlet (14) and the tendon outlet (13).

6. The automatic anti-blocking and anti-blocking sieve shaking device for tea leaves as claimed in claim 1, wherein: the dust suction device comprises a closed dust removal device (15) arranged at the upper part of the sieve bed (12).