Tea leaf impurity removing machine

Abstract

The utility model relates to the technical field of tea leaf equipment, and provides a tea leaf impurity removing machine which comprises a vibrating screen, an electrostatic mechanism, an air suction mechanism and a control unit. The electrostatic mechanism comprises a first electrostatic unit and a second electrostatic unit, each of the first electrostatic unit and the second electrostatic unit comprises an electrostatic roller and a conveying belt driven by the electrostatic roller, and the first electrostatic unit and the second electrostatic unit are arranged above the vibrating screen front and back in the conveying direction of the vibrating screen; the air suction mechanism comprises a first air suction opening and a second air suction opening, the first air suction opening is formed above the conveying belt of the first electrostatic unit, and the second air suction opening is formed above the conveying belt of the second electrostatic unit; and the control unit is used for controlling the electrostatic rollers in the first electrostatic unit and the second electrostatic unit to alternately obtain electricity once in a conveying belt rotation period, and the alternate electricity obtaining period is 1 / 2 of the conveying belt rotation period.

Description

Technical Field

[0001] The utility model relates to the technical field of tea preparation equipment, in particular to a tea impurity remover. Background Art

[0002] During the production process of tea, it is easy for woven bag fibers, dust, etc. to be mixed in. Therefore, in the process of tea production, an electrostatic roller is often introduced to adsorb these debris. The debris attached to the electrostatic roller is then scraped off by a scraper or a brush, and then the debris is sucked away by a suction mechanism to complete the removal of debris.

[0003] For example, the utility model patent with authorization announcement number CN218282695U and name "A new type of electrostatic impurity remover for tea production" discloses the above-mentioned scheme, which has the following disadvantages: when a scraper is used, the scraper is prone to generate noise, and is prone to wear and gap after long-term contact with the electrostatic roller; when a brush is used, the brush is prone to entanglement with filamentary debris, and the bristles of the brush itself are prone to fall off after long-term use, introducing new debris; at the same time, although the scraper or brush will scrape off the debris attached to the electrostatic roller, the suction mechanism needs to overcome a certain electrostatic suction force to absorb the debris, which puts forward requirements for the fan power of the suction mechanism. Utility Model Content

[0004] The utility model aims to provide a tea impurity remover, which aims to reduce the noise or secondary falling of impurities to a certain extent and reduce the power requirement of the air suction mechanism.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A tea impurity removal machine, comprising:

[0007] A vibrating screen, the vibrating screen is used to vibrate and transport tea leaves;

[0008] An electrostatic mechanism, the electrostatic mechanism comprising a first electrostatic unit and a second electrostatic unit, the first electrostatic unit and the second electrostatic unit both comprising an electrostatic roller and a conveyor belt driven by the electrostatic roller, and the first electrostatic unit and the second electrostatic unit are arranged above the vibrating screen in front and behind along the conveying direction of the vibrating screen;

[0009] A suction mechanism, the suction mechanism comprising a first suction port and a second suction port, the first suction port being arranged above the conveyor belt of the first electrostatic unit, and the second suction port being arranged above the conveyor belt of the second electrostatic unit;

[0010] A control unit, wherein the control unit is used to control the electrostatic rollers in the first electrostatic unit and the second electrostatic unit to be energized alternately once within a conveyor belt rotation cycle, and the cycle of alternating energization is 1 / 2 of the conveyor belt rotation cycle.

[0011] Preferably, the control unit includes five branches in parallel. In the first branch, the main coil of the first timer is connected in series with the normally closed contact of the intermediate relay; in the second branch, the main coil of the second timer is connected in series with the normally open contact of the intermediate relay; in the third branch, the normally open switch of the first timer, the normally closed switch of the second timer and the main coil of the intermediate relay are connected in series in sequence, and the normally open contact of the intermediate relay is connected in parallel with the normally open switch of the first timer; in the fourth branch, the normally closed contact of the intermediate relay is connected in series with the electrostatic roller of the first electrostatic unit; in the fifth branch, the normally open contact of the intermediate relay is connected in series with the electrostatic roller of the second electrostatic unit.

[0012] Preferably, the vibrating screen comprises a sieve shell, elastic feet, a first sieve plate and a vibrator, the elastic feet support the sieve shell, the first sieve plate is obliquely installed in the sieve shell and is located below the electrostatic mechanism, and the vibrator vibrates the sieve shell.

[0013] Preferably, the vibrating screen further comprises a material receiving plate, and the material receiving plate is arranged at the front end of the first screen plate.

[0014] Preferably, the vibrating screen further comprises a second sieve plate, the second sieve plate is arranged below the first sieve plate, and the mesh number of the second sieve plate is greater than the mesh number of the first sieve plate.

[0015] Preferably, it further comprises a first conveyor belt and a second conveyor belt, wherein the receiving end of the first conveyor belt is arranged below the end of the first screen plate, and the receiving end of the second conveyor belt is arranged below the end of the second screen plate.

[0016] Preferably, the vibrating screen further comprises a dust hopper and a dust receiving basket, the dust hopper is arranged at the bottom end of the sieve shell, and the dust receiving basket is placed corresponding to the end of the dust hopper.

[0017] Preferably, the electrostatic mechanism is supported by a support column separated from the sieve housing.

[0018] After adopting the above technical solution, the utility model has the following advantages compared with the background technology:

[0019] 1. The utility model controls the power loss of the electrostatic rollers in the first electrostatic unit and the second electrostatic unit, so that at any time, the conveyor belt of one electrostatic unit is in a power-off state so that the debris carried above it is sucked away by the suction port, and the conveyor belt of one electrostatic unit is in a power-on state so that the belt body below it absorbs the debris and transports it to the belt body above. In this way, there is no need for a scraper or a brush, and the suction mechanism can directly absorb the debris. At the same time, the power requirement for the suction mechanism can be reduced, and the noise can be further reduced.

[0020] 2. The utility model is provided with a first sieve plate and a second sieve plate, which can grade and filter the crumbs, broken stems and dust in the tea leaves, and recycle the crumbs and broken stems for use as deodorizing bags and other tea products, thereby improving the utilization rate of the tea leaves. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the utility model;

[0022] Figure 2 It is a working schematic diagram of the first electrostatic unit and the second electrostatic unit of the utility model;

[0023] Figure 3 Schematic diagram of the control principle of the control unit.

[0024] Description of reference numerals:

[0025] Vibrating screen: 110, screen shell; 120, elastic support foot; 130, first screen plate; 140, vibrator; 150, receiving plate; 160, second screen plate; 170, dust hopper; 180, dust collecting basket;

[0026] Electrostatic mechanism: 210, first electrostatic unit; 220, second electrostatic unit; 211, first electrostatic roller; 212, first conveyor belt; 230, support column;

[0027] Air suction mechanism: 310, first air suction port; 320, second air suction port;

[0028] Control unit: 410, first timer; 420, intermediate relay; 430, second timer;

[0029] 510. First conveyor belt; 520. Second conveyor belt. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model.

[0031] In addition, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientation or position relationship 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 of the present invention must have a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] When an element is referred to as being “fixed to” or “disposed on” or “provided on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0033] Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0034] Example

[0035] Please refer to Figure 1 As shown, this embodiment provides a tea impurity remover, which includes a vibrating screen, an electrostatic mechanism, an air suction mechanism and a control unit.

[0036] Among them, the vibrating screen is used to vibrate and transport tea leaves, so that the tea leaves are dispersed due to vibration during the transportation process, and it is easy for the debris in the tea leaves to contact with the electrostatic mechanism;

[0037] The electrostatic mechanism includes a first electrostatic unit 210 and a second electrostatic unit 220. The first electrostatic unit 210 and the second electrostatic unit 220 both include an electrostatic roller and a conveyor belt driven by the electrostatic roller (i.e., the first electrostatic unit includes a first electrostatic roller 211 and a first conveyor belt 212, and the second electrostatic roller includes a second electrostatic roller 221 and a second conveyor belt 222). When the electrostatic roller is charged, the surface of the conveyor belt is charged to complete the adsorption of foreign matter. Along the conveying direction of the vibrating screen 100, the first electrostatic unit 210 and the second electrostatic unit 220 are arranged above the vibrating screen 100 in front and back.

[0038] The suction mechanism includes a first suction port 310 and a second suction port 320. The first suction port 310 is disposed above the conveyor belt 212 of the first electrostatic unit 210 to absorb debris transported above the conveyor belt 212 of the first electrostatic unit 210. The second suction port 320 is disposed above the conveyor belt 212 of the second electrostatic unit 220 to absorb debris transported above the conveyor belt 212 of the second electrostatic unit 220. The air ducts of the first suction port 310 and the second suction port 320 are independent and not shared. The suction mechanism is a common device and will not be described in detail here.

[0039] The control unit is used to control the electrostatic roller 211 of the first electrostatic unit 210 and the electrostatic roller in the second electrostatic unit 220 to be energized alternately once within one conveyor belt rotation cycle, and the cycle of alternating energization is 1 / 2 of the conveyor belt rotation cycle.

[0040] In this way, the control unit supplies power to the first electrostatic roller 211 of the first electrostatic unit 210 and the second electrostatic roller 221 of the second electrostatic unit 220 in turn, and the two electrostatic rollers are in a state of alternating power loss. Figure 2 As shown, at any time, one of the electrostatic units of the conveyor belt is in a de-energized state, so that the debris carried above it is sucked away by the suction port, and one of the electrostatic units of the conveyor belt is in a powered state, so that the belt body below it absorbs the debris and transports it to the belt body above. In this way, there is no need for a scraper or a brush, and the suction mechanism can directly absorb the debris. At the same time, the power requirement for the suction mechanism can be reduced, further reducing noise.

[0041] It is easy to understand that in order to further improve the degree of removing impurities, multiple groups of first electrostatic units 210 and second electrostatic units 220 can be provided.

[0042] Please refer to Figure 3 As shown, the control unit includes five branches in parallel. In the first branch, the main coil of the first timer 410 is connected in series with the normally closed contact of the intermediate relay 420; in the second branch, the main coil of the second timer 430 is connected in series with the normally open contact of the intermediate relay 420; in the third branch, the normally open switch of the first timer 410, the normally closed switch of the second timer 430 and the main coil of the intermediate relay 420 are connected in series in sequence, and the normally open contact of the intermediate relay 420 is connected in parallel with the normally open switch of the first timer 410; in the fourth branch, the normally closed contact of the intermediate relay 420 is connected in series with the first electrostatic roller 211; in the fifth branch, the normally open contact of the intermediate relay 420 is connected in series with the second electrostatic roller 221.

[0043] In this way, when the start switch S1 is pressed, the first electrostatic roller 211 is energized to work, the main coil of the first timer 410 is energized, and timing begins; when the first timer 410 reaches the set time, its normally open contact is closed, the main coil of the intermediate relay 420 is energized, the normally open contact of the intermediate relay 420 is closed and self-locked, the normally closed contact is disconnected, the first electrostatic roller 211 loses power, and at the same time, the second electrostatic roller 221 is energized to work; when the second timer 430 reaches the set time, its normally closed contact is disconnected, the coil of the intermediate relay 420 loses power, its normally open contact is restored to disconnect, the second electrostatic roller 221 loses power, the first electrostatic roller 211 is energized, and a new round of work begins.

[0044] In this embodiment, the vibrating screen includes a sieve shell 110, elastic support feet 120, a first sieve plate 130 and an exciter 140. The elastic support feet 120 support the sieve shell 110. The first sieve plate 130 is installed in the sieve shell 110 and is located below the electrostatic mechanism. The exciter 140 excites the sieve shell 110 to make the first sieve plate 130 vibrate and oscillate the tea leaves. Since the first sieve plate 130 is inclined, the tea leaves are transported during the oscillation process.

[0045] The vibrating screen also includes a receiving plate 150 and a second sieve plate 160, a dust hopper 170 and a dust basket 180. The receiving plate 150 is arranged at the front end of the first sieve plate 130 to receive the feeding from the elevator; the second sieve plate 160 is arranged below the first sieve plate 130, and the mesh number of the second sieve plate 160 is greater than the mesh number of the first sieve plate 130. In this way, the tea leaves can be graded and screened. The first sieve plate 130 screens out broken leaves and stems, which are used as other tea products such as deodorizing bags to improve utilization; the second sieve plate 160 screens out dust; the dust hopper 170 is arranged at the bottom end of the sieve shell 110 to discharge the dust screened out by the second sieve plate 160, and the dust basket 180 is placed corresponding to the end of the dust hopper 170 to receive dust.

[0046] Corresponding to the first sieve plate 130 and the second sieve plate 160, the tea impurity remover also includes a first conveyor belt 510 and a second conveyor belt 520. The receiving end of the first conveyor belt 510 is arranged below the end of the first sieve plate 130 to transport the sieved tea leaves to the subsequent process. The receiving end of the second conveyor belt 520 is arranged below the end of the second sieve plate 160 to transport the sieved broken leaves and stems to the subsequent process.

[0047] In this embodiment, the inclination angles of the first sieve plate 130 and the second sieve plate 160 are 5-15°.

[0048] In this embodiment, the electrostatic mechanism is supported by a support column 230 separated from the sieve shell 110, so as to prevent the vibration of the vibrating screen from affecting the adsorption effect of the electrostatic mechanism.

[0049] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A tea impurity removal machine, characterized in that: include: A vibrating screen, the vibrating screen is used to vibrate and transport tea leaves; An electrostatic mechanism, the electrostatic mechanism at least comprising a first electrostatic unit and a second electrostatic unit, the first electrostatic unit and the second electrostatic unit both comprising an electrostatic roller and a conveyor belt driven by the electrostatic roller, and the first electrostatic unit and the second electrostatic unit are arranged above the vibrating screen in front and behind along the conveying direction of the vibrating screen; A suction mechanism, the suction mechanism comprising a first suction port and a second suction port, the first suction port being arranged above the conveyor belt of the first electrostatic unit, and the second suction port being arranged above the conveyor belt of the second electrostatic unit; A control unit, wherein the control unit is used to control the electrostatic rollers in the first electrostatic unit and the second electrostatic unit to be energized alternately once within a conveyor belt rotation cycle, and the cycle of alternating energization is 1 / 2 of the conveyor belt rotation cycle.

2. The tea impurity remover according to claim 1, characterized in that: The control unit includes five branches in parallel. In the first branch, the main coil of the first timer is connected in series with the normally closed contact of the intermediate relay; in the second branch, the main coil of the second timer is connected in series with the normally open contact of the intermediate relay; in the third branch, the normally open switch of the first timer, the normally closed switch of the second timer and the main coil of the intermediate relay are connected in series in sequence, and the normally open contact of the intermediate relay is connected in parallel with the normally open switch of the first timer; in the fourth branch, the normally closed contact of the intermediate relay is connected in series with the electrostatic roller of the first electrostatic unit; in the fifth branch, the normally open contact of the intermediate relay is connected in series with the electrostatic roller of the second electrostatic unit.

3. The tea impurity remover according to claim 1, characterized in that: The vibrating screen includes a sieve shell, elastic feet, a first sieve plate and a vibrator. The elastic feet support the sieve shell. The first sieve plate is obliquely installed in the sieve shell and is located below the electrostatic mechanism. The vibrator vibrates the sieve shell.

4. The tea impurity remover according to claim 3, characterized in that: The vibrating screen further comprises a material receiving plate, and the material receiving plate is arranged at the front end of the first screen plate.

5. The tea impurity remover according to claim 3, characterized in that: The vibrating screen further comprises a second sieve plate, which is arranged below the first sieve plate, and the mesh number of the second sieve plate is greater than the mesh number of the first sieve plate.

6. The tea impurity remover according to claim 5, characterized in that: It also includes a first conveyor belt and a second conveyor belt. The receiving end of the first conveyor belt is arranged below the end of the first screen plate, and the receiving end of the second conveyor belt is arranged below the end of the second screen plate.

7. The tea impurity remover according to claim 5, characterized in that: The vibrating screen further comprises a dust hopper and a dust receiving basket. The dust hopper is arranged at the bottom end of the sieve shell, and the dust receiving basket is placed corresponding to the end of the dust hopper.

8. The tea impurity remover according to claim 3, characterized in that: The electrostatic mechanism is supported by a support column separated from the sieve housing.

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