Tea residue screw conveyor

Abstract

The utility model relates to a kind of tea residue screw conveyer, including the sleeve of oblique upward arrangement, the screw conveying rod in the sleeve, the drive unit of driving screw conveying rod rotation;The sleeve lower part is provided with feed inlet, and upper part is provided with discharge port, it is characterized by: the sleeve is provided with several spray ports along its length direction, the jet axis of the spray port is configured as along the tangent direction of the sleeve circle section;The spray port is connected with water supply system by the pipeline of being provided with solenoid valve;In addition, the sleeve is also provided with drain at 1 / 5~1 / 3 from its lower end.Its advantages are: the sleeve is provided with several spray ports along length direction, and spray port is divided into three independent humidity control area, material moisture content in the sleeve is detected in real time by water content sensor, and moisture content requirement set in combination with material characteristics (black tea, green tea, fermented tea, large leaf tea etc.), solenoid valve opening degree is dynamically adjusted, to solve the rheological property difference problem of different tea residue.

Description

Technical Field

[0001] This utility model relates to the field of solid material conveying equipment, and in particular to a tea residue screw conveyor. Background Technology

[0002] Tea dregs are solid waste generated after the extraction process in tea factories. In the past, tea dregs were collected and transported using a dregs collection cart. Therefore, the tea dregs discharge outlet of the existing equipment is highly matched with the collection cart and is positioned low. However, the collection cart cannot meet the requirements of automated production and is also difficult to meet the hygiene standards of the food industry.

[0003] Therefore, using a screw conveyor to lift the tea residue discharged from the existing tea residue outlet to a higher level is a low-cost equipment modification solution. Chinese utility model patent CN205972722U provides a screw conveyor for conveying tea residue, which includes legs, a first support at the top of the legs, a second support at the top of the first support, a U-shaped conveyor on one side of the first support, a screw shaft inside the U-shaped conveyor, screw blades on the outside of the screw shaft, a thrust plate on one side of the screw blades, a drive box on one side of the U-shaped conveyor, a funnel at the top of the U-shaped conveyor, a water receiving tray at the bottom of the U-shaped conveyor, a water collecting tray at the bottom of the water receiving tray, a plug on one side of the water collecting tray, and support rods on both sides of the U-shaped conveyor.

[0004] However, tea leaves used in tea processing plants vary greatly in type and morphology. For example, black tea leaves are fibrous, green tea leaves are fine and crumbly, and fermented tea leaves are viscous. Furthermore, the moisture content of the tea leaves fluctuates significantly. This results in the following drawbacks of existing screw conveyors used for upward-inclined conveying of tea leaves: 1. Drier tea dregs (moisture content <45%), especially tea dregs with larger leaves, have a low coefficient of friction with the steel sleeve, causing the material to slip back and form a cavity inside the sleeve, resulting in the screw rod spinning idly.

[0005] 2. Fine tea dregs will adhere to the inner wall of the sleeve, forming a ring-shaped accumulation layer, which reduces the conveying efficiency.

[0006] 3. A "slag deposition zone" is formed at the bottom of the inclined conveyor sleeve, and the screw conveyor rod cannot effectively lift the tea dregs in the deposition zone.

[0007] 4. Tea residue contains a large amount of tannic acid, so the inside of the sleeve needs to be manually cleaned after transportation to avoid corrosion from the acidic tea residue, which increases labor costs.

[0008] Therefore, it is necessary to improve and optimize existing screw conveyors to better meet user needs. Utility Model Content

[0009] The purpose of this utility model embodiment is to address the shortcomings of the existing technology structure by proposing a tea residue screw conveyor to solve the defects in the existing technology.

[0010] To achieve the aforementioned objectives, the tea residue screw conveyor proposed in this utility model embodiment is implemented through the following technical solution: A screw conveyor for tea residue includes an upwardly inclined sleeve, a screw conveyor rod disposed within the sleeve, and a drive unit for rotating the screw conveyor rod. The sleeve has an inlet at its lower part and an outlet at its upper part. The sleeve is characterized by having a plurality of spray nozzles along its length, the jet axis of which is configured to be tangential to the circular cross-section of the sleeve. The spray nozzles are connected to a water supply system via pipes equipped with solenoid valves. Furthermore, the sleeve has a first drain outlet located 1 / 5 to 1 / 3 of the way from its lower end, also equipped with a solenoid valve. A second drain outlet is also located at the lower end of the sleeve, also equipped with a solenoid valve.

[0011] The spiral conveyor rod is a hollow shaft with radial flushing holes between the blades. The hollow shaft is connected to a high-pressure water pump via a rotary joint.

[0012] The jet axis of the radial flushing hole is configured to form an angle of 10°-20° with the normal of the helical blade.

[0013] The blade surface of the spiral conveyor is provided with serrated protrusions.

[0014] The top surface of the upper part of the sleeve is provided with a cleaning window that can be slidably opened and closed, and a protective cover is provided for covering the cleaning window. The protective cover is open on the side facing the discharge direction, and a multi-directional rotating nozzle is installed on its inner side. The jet axis of the rotating nozzle forms an angle of 30°-60° with the axial direction of the screw conveyor.

[0015] The number of spray nozzles is no less than 5, and the spacing between them decreases sequentially along the discharge direction of the sleeve.

[0016] The tea residue screw conveyor also includes a wastewater filter tank, which is located below the drain outlet and is equipped with a metal filter screen.

[0017] The sleeve is also equipped with several moisture content sensors.

[0018] Compared with the prior art, the beneficial effects of this utility model are: 1. A segmented spray sleeve is adopted, with several spray nozzles set along the length of the sleeve. The spray nozzles are divided into three independent humidity control zones. The moisture content of the material inside the sleeve is detected in real time by a moisture content sensor. A preset algorithm is set based on the characteristics of the material (black tea, green tea, fermented tea, large leaf tea, etc.) to dynamically adjust the opening of the solenoid valve to solve the problem of different rheological characteristics of different tea residues.

[0019] 2. The screw conveyor is a hollow shaft with radial flushing holes between the blades. A quick-opening cleaning window is provided at the top of the sleeve, and a protective cover is provided over the cleaning window. A multi-directional rotating nozzle is installed inside the protective cover to facilitate cleaning inside the sleeve.

[0020] 3. Serrated protrusions are added to the edge of the blade to increase the gripping force of wet slag. Attached Figure Description

[0021] The above features and advantages of the present invention will become clearer and easier to understand from the following description of exemplary embodiments thereof in conjunction with the accompanying drawings.

[0022] Figure 1 This is a schematic diagram of the structure of the tea residue screw conveyor according to an embodiment of the present invention. Detailed Implementation

[0023] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] The terms "front," "rear," "left," "right," "inner," and "outer" used in this specification are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Any changes or adjustments to their relative relationships, without substantially altering the technical content, shall also be considered within the scope of implementation of this utility model.

[0025] In the description of the following embodiments, unless otherwise expressly specified and limited, the term "connection" and other such terms should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an indirect connection through an intermediate medium; it can be the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] See Figure 1As shown in the figure, this utility model embodiment proposes a tea residue screw conveyor, including an inclined upward sleeve 1, a screw conveying rod 2 disposed within the sleeve 1, and a drive unit 3 for driving the screw conveying rod 2 to rotate. The sleeve 1 has a feed inlet 4 at its lower part and a discharge outlet 5 at its upper part. Wherein: A sleeve 1 has several spray nozzles 11 arranged along its length. The jet axis of the spray nozzles 11 is configured to be tangential to the circular cross-section of the sleeve 1. Spray pipes 6 are connected to the outside of the spray nozzles 11, and solenoid valves 61 are installed on the spray pipes 6. The spray pipes 6 are connected to a water supply system. In this embodiment 1, the sleeve 1 has 5 spray nozzles 11, and the spacing decreases sequentially along the discharge direction of the sleeve. They are divided into three groups from bottom to top according to the combination of 1, 2, 2, and the three groups are independently humidity controlled. Correspondingly, a moisture content sensor 12 is also provided on the inner wall of the sleeve 1. The moisture content sensor 12 detects the moisture content of the material in the sleeve in real time, and combined with the moisture content requirements set according to the characteristics of the material (such as black tea, green tea, fermented tea, large-leaf tea, etc.), the PLC dynamically adjusts the opening of the solenoid valve 61, thereby solving the problem of different rheological characteristics of different tea residues.

[0027] In addition, a first drain outlet 13 is provided at a distance of 1 / 5 to 1 / 3 from the lower end of the sleeve 1, and a solenoid valve is installed in the first drain outlet 13. The first drain outlet 13 is not located at the lowest end, but at a higher position. The purpose of this arrangement is to allow water to accumulate at the lower end of the sleeve and avoid the formation of a slag deposition area at the bottom.

[0028] Correspondingly, a second drain port 14 is also provided at the lower end of the sleeve 1, and the second drain port 14 is also equipped with a solenoid valve. The function of providing the second drain port 14 is: 1. Used for draining water during the cleaning of the inside of the sleeve after the equipment has finished conveying, thereby preventing water from accumulating in the sleeve and being unable to drain; 2. When some tea residue cannot be lifted normally by the screw conveyor when water accumulates at the bottom, the water accumulation at the bottom of the sleeve 1 can be reduced by opening the second drain outlet 14 or periodically opening and closing the second drain outlet 14, so that the tea residue can be lifted normally.

[0029] In addition, the top surface of the upper part of the sleeve 1 is provided with a cleaning window 15 that can be slidably opened and closed, and a protective cover 16 is provided to cover the cleaning window 15. The protective cover 16 is open on the side facing the discharge direction, and a multi-directional rotating nozzle 17 is installed on its inner side. The jet axis of the rotating nozzle 17 forms an angle of 30°-60° with the axis of the screw conveyor. The rotating nozzle 17 is connected to the water supply system through a flushing pipe 7, and a solenoid valve 71 is installed on the flushing pipe 7.

[0030] The spiral conveyor 2 is a hollow shaft with radial flushing holes 21 formed between the blades. The hollow shaft is connected to a high-pressure water pump via a rotary joint. The jet axis of the radial flushing holes 21 is configured at an angle of 10°-20° to the normal of the spiral blades 22 for flushing the spiral blades. In addition, the blade surfaces of the spiral conveyor 2 have serrated protrusions to increase the gripping force of wet slag.

[0031] In addition, the tea residue screw conveyor also includes a wastewater filter tank 8, which is located below the first drain outlet and is equipped with a metal filter screen.

[0032] Compared with the prior art, the beneficial effects of this utility model are: 1. A segmented spray sleeve is adopted, with several spray nozzles set along the length of the sleeve. The spray nozzles are divided into three independent humidity control zones. The moisture content of the material inside the sleeve is detected in real time by a moisture content sensor. The opening of the solenoid valve is dynamically adjusted in combination with the moisture content requirements set according to the characteristics of the material (black tea, green tea, fermented tea, large leaf tea, etc.) to solve the problem of different rheological characteristics of different tea residues.

[0033] 2. The screw conveyor is a hollow shaft with radial flushing holes between the blades. A quick-opening cleaning window is provided at the top of the sleeve, and a protective cover is provided over the cleaning window. A multi-directional rotating nozzle is installed inside the protective cover to facilitate cleaning inside the sleeve.

[0034] 3. Serrated protrusions are added to the edges of the blades. The present invention has been described in detail above through embodiments. However, those skilled in the art will understand that the above embodiments are only one of the preferred embodiments of the present invention. Due to space limitations, not all embodiments can be listed here. Any implementation that can embody the technical solution of the claims of the present invention is within the protection scope of the present invention.

[0035] It should be noted that the above content is a further detailed description of the present utility model in conjunction with specific embodiments, and it should not be considered that the specific embodiments of the present utility model are limited to this. Under the guidance of the above embodiments, those skilled in the art can make various improvements and modifications based on the above embodiments, and these improvements or modifications fall within the protection scope of the present utility model.

Claims

1. A screw conveyor for tea residue, comprising an upwardly inclined sleeve, a screw conveying rod disposed within the sleeve, and a drive unit for rotating the screw conveying rod; the sleeve has a feed inlet at its lower part and a discharge outlet at its upper part, characterized in that: The sleeve is provided with a plurality of spray nozzles along its length, and the jet axis of the spray nozzles is configured to be along the tangent direction of the circular cross section of the sleeve; the spray nozzles are connected to a water supply system through pipelines equipped with solenoid valves; in addition, the sleeve is provided with a first drain outlet at a distance of 1 / 5 to 1 / 3 from its lower end, and the first drain outlet is equipped with a solenoid valve; the lower end of the sleeve is also provided with a second drain outlet, and the second drain outlet is equipped with a solenoid valve.

2. The tea residue screw conveyor according to claim 1, characterized in that: The spiral conveyor rod is a hollow shaft with radial flushing holes between the blades. The hollow shaft is connected to a high-pressure water pump via a rotary joint.

3. A screw conveyor for tea dregs according to claim 2, characterized in that: The jet axis of the radial flushing hole is configured to form an angle of 10°-20° with the normal of the helical blade.

4. The tea residue screw conveyor according to claim 1, characterized in that: The blades of the spiral conveyor are provided with serrated protrusions.

5. A screw conveyor for tea dregs according to claim 1, characterized in that: The top surface of the upper part of the sleeve is provided with a cleaning window that can be slidably opened and closed, and a protective cover is provided for covering the cleaning window. The protective cover is open on the side facing the discharge direction, and a multi-directional rotating nozzle is installed on its inner side. The jet axis of the rotating nozzle forms an angle of 30°-60° with the axial direction of the screw conveyor.

6. A screw conveyor for tea dregs according to claim 1, characterized in that: The number of spray nozzles is no less than 5, and the spacing between them decreases sequentially along the discharge direction of the sleeve.

7. A screw conveyor for tea dregs according to claim 1, characterized in that: The tea residue screw conveyor also includes a wastewater filtration tank, which is located below the first drain outlet and is equipped with a metal filter screen.

8. A screw conveyor for tea dregs according to claim 1, characterized in that: The sleeve is also equipped with several moisture content sensors.

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