A tea leaf screening device

Abstract

The application relates to the technical field of tea production, and particularly discloses a tea screening device, which comprises a base, a mounting seat rotatably arranged on the base, an inclined assembly arranged on the base, a supporting frame arranged on the mounting seat, a feeding hopper, a drying and primary screening assembly and a grading screening assembly sequentially arranged on the supporting frame, wherein the grading screening assembly comprises a sieve cylinder, a plurality of first sieve holes are uniformly arranged on the sieve cylinder, the diameters of the plurality of sieve holes gradually increase along the length direction of the sieve cylinder, a partition plate is arranged on the supporting frame, a cleaning assembly is arranged on the supporting frame, and an adjusting assembly is arranged on the outer wall of the sieve cylinder. The drying and primary screening assembly removes the excess moisture on the tea, the grading screening assembly can make the smaller tea be separated from the sieve cylinder first, and the larger tea is separated from the sieve cylinder later, so that the tea is graded and screened.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tea production, and particularly relates to a tea screening device. BACKGROUND

[0002] In the deep processing of tea, the tea needs to be graded and screened, and many tea factories directly use air separators or vibrating screens to screen and separate impurities such as sand, dust, green and yellow leaves in the tea. Tea is a kind of beverage that is deeply loved by the majority of people, and has the characteristics of being natural, healthy and convenient to drink. With the continuous improvement of people's living standards, more and more people have higher and higher requirements for tea. In the past, the screening of tea was often carried out manually, which was time-consuming and laborious, and the work efficiency was not high. The existing technology uses a mechanical vibration method to screen tea, but it is easy to damage the tea, and the vibration screening effect is not good due to the moisture of the tea. SUMMARY

[0003] In order to overcome the shortcomings of the prior art, the present application provides a tea screening device.

[0004] The present application provides a tea screening device, which adopts the following technical scheme:

[0005] A tea screening device, comprising a base, a mounting seat rotatably arranged on the base, an inclination assembly arranged on the base and used for driving the mounting seat to rotate, a support frame arranged on the mounting seat, an upper hopper, a drying and primary screening assembly and a grading and screening assembly arranged in sequence on the support frame, the grading and screening assembly comprising a screen cylinder, a plurality of first screen holes uniformly arranged on the screen cylinder, the diameters of the plurality of first screen holes gradually increasing along the length direction of the screen cylinder, a plurality of partition plates uniformly arranged on the support frame and used for partitioning the screen cylinder, a cleaning assembly arranged on the support frame, the cleaning assembly comprising a first outer gear ring coaxially arranged on the screen cylinder and a first driving motor fixedly arranged on the support frame, a first driving gear coaxially arranged on the output shaft of the first driving motor and engaged with the first outer gear ring, a cleaning seat slidingly arranged between two adjacent partition plates, a plurality of dredging rods uniformly arranged on the cleaning seat, a first spring arranged on the top of the cleaning seat and having the other end connected with the top of the partition plate, a rack arranged on the top of the cleaning seat, and an extension shaft coaxially arranged on the output shaft of the first driving motor, a half gear coaxially arranged on the extension shaft and engaged with the rack, and an adjusting assembly arranged on the outer wall of the screen cylinder and used for adjusting the length of the screen cylinder and the opening size of the first screen holes.

[0006] By adopting the above technical scheme, the staff adds the tea to be screened from the top of the feeding hopper, so that the tea enters the drying primary screening assembly, the drying primary screening assembly removes the excess moisture on the tea, and the mounting seat is driven from the horizontal state to the inclined state through the inclined assembly, so that the tea is conveniently screened from the drying primary screening assembly into the grading screening assembly. Since the first screen hole diameter on the screen cylinder gradually increases along the length direction of the screen cylinder, smaller tea will be separated from the screen cylinder first, and larger size tea will be separated from the end of the screen cylinder away from the drying primary screening assembly, so that the tea is separated.

[0007] Optionally, the drying primary screening assembly comprises a drying cylinder, a plurality of material lifting plates are uniformly arranged on the inner wall of the drying cylinder, a plurality of protrusions are uniformly arranged on the inner wall of the drying cylinder between two of the material lifting plates, a plurality of filter holes are uniformly arranged on the drying cylinder, a plurality of heating circular ring wires are uniformly arranged on the outer wall of the drying cylinder along the length direction of the drying cylinder, a waste hopper for collecting fine waste in the drying cylinder is arranged on the mounting seat, a cleaning brush for dredging the drying cylinder is arranged on the top of the waste hopper, a second outer gear ring is arranged on the drying cylinder, a second driving motor is arranged on the mounting seat, a second driving gear is coaxially arranged on the output shaft of the second driving motor, and the second driving gear is engaged with the second outer gear ring.

[0008] By adopting the above technical scheme, the tea is dried to a certain extent, so that the tea is conveniently screened subsequently.

[0009] Optionally, an exhaust assembly is arranged on the support frame, the exhaust assembly comprises a smoke collecting hood and a fan, the smoke collecting hood is fixedly arranged on the support frame and located at the top of the drying cylinder, the fan is communicatively arranged at the top of the smoke collecting hood, and the other end of the fan is communicatively provided with an exhaust pipe.

[0010] By adopting the above technical scheme, the dust and gas generated at the drying cylinder are conveniently extracted, so that they are not easy to affect the surrounding environment.

[0011] Optionally, a closing assembly for closing the drying cylinder is arranged on the support frame, the closing assembly comprises a closing seat, the closing seat is fixedly arranged on the support frame, one end of the closing seat is rotatably connected with the drying cylinder and the other end is rotatably connected with the screen cylinder, a through hole is arranged on the closing seat, a plugging plate for plugging the through hole is coaxially rotatably arranged on the closing seat, a third driving motor is fixedly arranged on the closing seat, a third driving gear is coaxially arranged on the output shaft of the third driving motor, a third outer gear ring is coaxially fixedly arranged on the plugging plate, and the third driving gear is engaged with the third outer gear ring.

[0012] By adopting the above technical scheme, the next batch of tea can be dried while the tea is screened, thereby improving the production efficiency.

[0013] Optionally, the adjusting assembly comprises an adjusting cylinder coaxially sleeved outside the screening cylinder, a plurality of second screen holes are uniformly arranged on the adjusting cylinder along the length direction of the adjusting cylinder, an adjusting rail is fixedly arranged on the supporting frame, a first adjusting seat is arranged on the top of the partition plate, the first adjusting seat is slidingly arranged in the adjusting rail, an adjusting screw rod is rotatably arranged on the adjusting rail, the first adjusting seat is threadedly connected with the adjusting screw rod, an adjusting motor is arranged at one end of the adjusting rail, an output shaft of the adjusting motor is coaxially connected with the adjusting screw rod, a second adjusting seat in the shape of a ring is rotatably arranged on the partition plate, the adjusting cylinder is coaxially rotatably arranged on the second adjusting seat, an adjusting arc-shaped slot is arranged on the second adjusting seat, an adjusting block is slidingly arranged in the adjusting arc-shaped slot, one end of the adjusting block is connected with the adjusting cylinder, a reciprocating screw rod is fixedly arranged on the second adjusting seat, a driving block is slidingly arranged on the second adjusting seat, one end of the driving block is slidingly arranged in a sliding groove on the reciprocating screw rod, the other end of the driving block is provided with a pushing rod, the pushing rod abuts against the adjusting block, a second spring is arranged in the adjusting arc-shaped slot, the other end of the second spring is connected with the adjusting block, an electromagnetic lock tongue is further arranged on the second adjusting seat, and the lock tongue of the electromagnetic lock tongue is inserted into the first screen hole on the screening cylinder.

[0014] By adopting the above technical scheme, the length of the screening cylinder and the adjusting cylinder as a whole can be adjusted, and the size of the first screen hole on the screening cylinder can be adjusted, thereby facilitating the adjustment of the size of the screened tea according to requirements.

[0015] Optionally, a rotating shaft is coaxially arranged in the interior of the screening cylinder, and a spiral conveying blade is arranged on the rotating shaft.

[0016] By adopting the above technical scheme, the spiral conveying blade can to some extent avoid the situation that the tea moves too fast on the screening cylinder, thereby causing poor screening effect of the tea.

[0017] Optionally, the inclination assembly comprises a power motor, a limiting sliding rail, a driving seat, a connecting rod and a driving screw rod, the limiting sliding rail is fixedly arranged on the base, the driving seat is slidingly arranged on the limiting sliding rail, the driving screw rod is rotatably arranged in the limiting sliding rail and threadedly connected with the driving seat, one end of the connecting rod is hingedly connected with the driving seat and the other end is hingedly connected with the bottom of the mounting seat, the power motor is arranged at one end of the limiting sliding rail and an output shaft of the power motor is coaxially connected with the driving screw rod, and the mounting seat is hingedly connected with the base away from the connecting rod.

[0018] By adopting the technical scheme, the mounting seat is conveniently driven from the horizontal state to the inclined state, so that the tea is conveniently discharged from the drying cylinder into the sieve cylinder for sieving.

[0019] Optionally, the rotating shaft is hollow, a plurality of air jets are uniformly arranged on the rotating shaft along the length direction of the rotating shaft and the air jets are in communication with the interior of the rotating shaft, a gas pump is arranged on the mounting seat and the gas pump is in communication with the rotating shaft through a gas conveying pipe.

[0020] By adopting the technical scheme, the gas pump is started, the compressed air is pressed into the hollow rotating shaft and then is sprayed out through the air jets, so that the interior of the sieve cylinder is conveniently cleaned.

[0021] Optionally, a plurality of collecting hoppers are uniformly arranged on the mounting seat, the collecting hoppers are located between the two partition plates, one side of the collecting hopper is hollow and a movable hopper is slidably arranged in the interior of the collecting hopper, and the other side of the movable hopper is fixedly connected with the partition plate.

[0022] By adopting the technical scheme, the movable hopper is synchronously moved in the moving process of the partition plate, so that the collecting hopper and the movable hopper as a whole collect the sieved tea.

[0023] Optionally, a material guiding frame is slidably arranged on the mounting seat, a material guiding plate is arranged on the material guiding frame and the top of the material guiding frame is connected with the partition plate close to the outlet end of the sieve cylinder.

[0024] By adopting the technical scheme, when the overall length of the sieve cylinder is adjusted by the adjusting assembly, the material guiding frame is synchronously moved, so that the tea or impurities with a size greater than the size of the first sieve hole of the sieve cylinder is discharged along the material guiding plate.

[0025] The present application has the following advantages:

[0026] 1. By arranging the drying and primary sieving assembly, the inclination assembly and the grading sieving assembly, the drying and primary sieving assembly removes the excess water on the tea, the inclination assembly drives the mounting seat from the horizontal state to the inclined state, so that the tea is conveniently discharged from the drying and primary sieving assembly into the sieve cylinder, the smaller tea is first separated from the sieve cylinder and the tea with a larger size is separated from the end of the sieve cylinder away from the drying and primary sieving assembly, so that the tea is graded and sieved.

[0027] 2. By arranging the cleaning assembly, the sieve cylinder can be cleaned in real time, so that the sieving effect of the sieve cylinder on the tea is maintained.

[0028] 3. By arranging the adjusting assembly, the length of the sieve cylinder and the adjusting cylinder as a whole can be conveniently adjusted and the size of the first sieve hole of the sieve cylinder can be adjusted, so that the size of the sieved tea can be adjusted according to the requirement. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 Structure diagram of the whole application;

[0030] Figure 2 Structure diagram of the installation of the tilting assembly of the application;

[0031] Figure 3 Structure diagram of the installation of the closing assembly of the application;

[0032] Figure 4 Structure diagram of the installation of the drying and preliminary screening assembly of the application;

[0033] Figure 5 Structure diagram of the installation of the adjusting assembly of the application;

[0034] Figure 6 Structure diagram of the installation of the first driving motor and the first outer gear ring of the application;

[0035] Figure 7 Structure diagram of the installation of the cleaning seat and the dredging rod of the application;

[0036] Figure 8 Structure diagram of the installation of the adjusting cylinder and the adjusting rail of the application;

[0037] Figure 9 Structure diagram of the installation of the first driving motor and the first outer gear ring of the application; Figure 8 Enlarged structure diagram of the A part in the middle;

[0038] In the figure: 1, base; 11, mounting seat; 12, support frame; 13, upper hopper; 2, drying primary screen assembly; 21, drying cylinder; 22, material lifting plate; 23, protruding block; 24, filter hole; 25, heating circular ring wire; 26, waste hopper; 27, cleaning brush; 28, second outer gear ring; 29, second driving motor; 291, second driving gear; 3, classification screening assembly; 31, screen cylinder; 311, first screen hole; 32, partition plate; 4, cleaning assembly; 41, first outer gear ring; 42, first driving motor; 43, first driving gear; 44, cleaning seat; 441, dredging rod; 442, first spring; 45, rack; 46, extension shaft; 47, half gear; 5, adjustment assembly; 51, adjustment cylinder; 511, second screen hole; 52, adjustment rail; 53, first adjustment seat; 54, adjustment screw rod; 55, adjustment motor; 56, second adjustment seat; 57, adjustment arc-shaped slot; 571, adjustment block; 572, second spring; 58, reciprocating screw rod; 59, driving block; 591, pushing rod; 592, second adjustment motor; 593, electromagnetic lock tongue; 6, exhaust assembly; 61, smoke collecting cover; 62, fan; 63, exhaust pipe; 7, sealing assembly; 71, sealing seat; 72, through hole; 73, sealing plate; 74, third driving motor; 75, third driving gear; 76, third outer gear ring; 8, rotating shaft; 81, spiral conveying blade; 82, fourth driving motor; 821, rotating gear; 822, driven gear; 83, air jet head; 831, air pump; 84, collection hopper; 85, movable hopper; 86, material guide frame; 87, material guide plate; 9, inclination assembly; 91, power motor; 92, limiting slide rail; 93, driving seat; 94, connecting rod; 95, driving screw rod. DETAILED DESCRIPTION

[0039] The application will be further described below in conjunction with the accompanying drawings, but the protection scope of the application is not limited to the following description.

[0040] As Figures 1 to 9As shown, a tea screening device, it includes base 1, base 1 is rotatably mounted on the mounting seat 11, base 1 is installed for driving mounting seat 11 to rotate the tilt assembly 9, mounting seat 11 is installed on the support frame 12, support frame 12 is installed in turn on the upper hopper 13, drying initial screening assembly 2 and grading screening assembly 3, upper hopper 13 is fixedly installed on the support frame 12, drying initial screening assembly 2 is rotatably mounted on the support frame 12, grading screening assembly 3 includes screen cylinder 31, screen cylinder 31 is uniformly provided with a plurality of first screen holes 311 along the length direction of itself, the aperture of a plurality of first screen holes 311 gradually increases along the length direction of screen cylinder 31, support frame 12 is uniformly installed with a plurality of separation plates 32 for separating screen cylinder 31, support frame 12 is installed with cleaning assembly 4, cleaning assembly 4 includes first outer gear ring 41 and first drive motor 42, first outer gear ring 41 is coaxially installed on screen cylinder 31, first drive motor 42 is fixedly installed on support frame 12, first drive motor 42 is coaxially installed with first drive gear 43 on the output shaft, first drive gear 43 is engaged with first outer gear ring 41, half gear 47 is rotatably mounted on support frame 12, cleaning rod is fixedly installed on half gear 47, the other end of cleaning rod is installed with connecting rod 94, connecting rod 94 is installed with cleaning seat 44, cleaning seat 44 is uniformly installed with a plurality of dredging rods 441, the top of cleaning seat 44 is installed with first spring 442, the other end of first spring 442 is fixedly connected with separation plate 32, first drive motor 42 is coaxially installed with extension shaft 46 on the output shaft, half gear 47 is coaxially installed on extension shaft 46, half gear 47 is engaged with rack 45, extension shaft 46 is fixedly installed with spline, in addition, half gear 47 is rotatably connected with cleaning seat 44, so that half gear 47 can slide along the length direction of extension shaft 46, and half gear 47 can be driven by extension shaft 46 to rotate, the outer wall of screen cylinder 31 is installed with adjusting assembly 5 for adjusting the length of screen cylinder 31 and the opening size of first screen hole 311.In use, the staff will add the tea to be screened from the top of the feeding hopper 13, so that the tea enters the drying and primary screening assembly 2, which removes excess moisture on the tea, facilitating subsequent screening of the tea, and also removes sand and dust entrapped in the tea, improving the effect of subsequent tea screening. When the tea drying is completed, the mounting seat 11 is driven by the tilting assembly 9 to rotate from the horizontal state to the inclined state, facilitating the tea entering the classification and screening assembly 3 from the drying and primary screening assembly 2 for screening. Since the first screen holes 311 on the screen cylinder 31 gradually increase in size along the length direction of the screen cylinder 31, smaller tea will be separated from the screen cylinder 31 first, and larger tea will be separated from the end of the screen cylinder 31 away from the drying and primary screening assembly 2, thereby separating the tea. During the screening process, in order to unblock the first screen holes 311 on the screen cylinder 31 and improve the screening effect of the tea, the first drive motor 42 is started, which rotates the first drive gear 43, which in turn rotates the first outer gear 41 synchronously, which in turn rotates the screen cylinder 31 synchronously. At the same time, the first drive motor 42 rotates the extension shaft 46 and the half gear 47 synchronously. When the half gear 47 engages with the rack 45, the half gear 47 moves the cleaning seat 44 away from the screen cylinder 31, and the first spring 442 is compressed. When the half gear 47 disengages from the rack 45, the cleaning seat 44 moves towards the screen cylinder 31 under the action of the first spring 442. When the unblocking rod 441 contacts the outer wall of the screen cylinder 31, the plurality of unblocking rods 441 on the cleaning seat 44 impact the screen cylinder 31. When the first screen hole 311 on the screen cylinder 31 is directly opposite the unblocking rod 441, the plurality of unblocking rods 441 are inserted into the first screen hole 311. During the reciprocating movement of the cleaning seat 44, the screen cylinder 31 is unblocked and cleaned, to some extent, preventing the first screen hole 311 from being blocked.

[0041] As Figures 1 to 9As shown, the drying and primary screening assembly 2 comprises a drying cylinder 21, a plurality of lifting plates 22 are uniformly arranged on the inner wall of the drying cylinder 21 along the length direction of the drying cylinder 21, a plurality of protrusions 23 are uniformly arranged on the inner wall of the drying cylinder 21 between two lifting plates 22, a plurality of filter holes 24 are uniformly arranged on the drying cylinder 21, a plurality of heating circular ring wires 25 are uniformly arranged on the outer wall of the drying cylinder 21 along the length direction of the drying cylinder 21, a waste hopper 26 for collecting the fine waste in the drying cylinder 21 is arranged on the mounting seat 11, a cleaning brush 27 for dredging the drying cylinder 21 is arranged on the top of the waste hopper 26, a second outer gear ring 28 is arranged on the drying cylinder 21, a second driving motor 29 is arranged on the mounting seat 11, a second driving gear 291 is coaxially arranged on the output shaft of the second driving motor 29, and the second driving gear 291 is engaged with the second outer gear ring 28; in use, the heating circular ring wires 25 are powered to heat and warm the drying cylinder 21, so that the tea leaves are dried, at the same time, the second driving motor 29 is started, the second driving motor 29 drives the second driving gear 291 to rotate synchronously in the process of rotating, the second gear drives the second outer gear ring 28 to rotate synchronously in the process of rotating, and the second outer gear ring 28 drives the drying cylinder 21 to rotate synchronously in the process of rotating, the tea leaves are lifted from low to high by the plurality of lifting plates 22 and then fall freely in the process of rotating of the drying cylinder 21, so that the tea leaves are turned over in the drying cylinder 21, so that the tea leaves are heated more uniformly, and the drying effect is better, the plurality of protrusions 23 make the tea leaves have a certain gap with the inner wall of the drying cylinder 21, which avoids the tea leaves from being warmed too quickly to a certain extent, and the fine sand or dust can leak out of the filter holes 24 in the process of turning over of the tea leaves, so that the subsequent screening effect of the tea leaves is improved.

[0042] As shown in Figures 1 to 9 , the support frame 12 is fixedly provided with an exhaust assembly 6, the exhaust assembly 6 comprises a smoke collecting hood 61 and a fan 62, the smoke collecting hood 61 is fixedly arranged on the support frame 12 and located at the top of the drying cylinder 21, the fan 62 is communicatedly arranged at the top of the smoke collecting hood 61, and the other end of the fan 62 is communicatedly provided with an exhaust pipe 63; in use, since the drying and primary screening assembly 2 warms and dries the tea leaves, a lot of dust and gas are generated, at this time, the fan 62 is started, the fan 62 makes the air exhaust from the exhaust pipe 63, so that a negative pressure is formed near the smoke collecting hood 61, thus the dust and gas generated at the drying cylinder 21 are easily extracted, so that the surrounding environment is not easily affected.

[0043] As shown in Figures 1 to 9As shown, the support frame 12 is provided with a closing assembly 7 for closing the drying cylinder 21, the closing assembly 7 comprises a closing seat 71 fixedly installed on the support frame 12, one end of the closing seat 71 is rotatably connected with the drying cylinder 21 and the other end is rotatably connected with the screening cylinder 31, a through hole 72 is formed in the closing seat 71, a plugging plate 73 for plugging the through hole 72 is coaxially rotatably installed on the closing seat 71, a third driving motor 74 is fixedly installed on the closing seat 71, a third driving gear 75 is coaxially installed on an output shaft of the third driving motor 74, a third outer gear ring 76 is coaxially fixedly installed on the plugging plate 73, and the third driving gear 75 is engaged with the third outer gear ring 76; when the screening cylinder 31 is screening tea leaves, the third driving motor 74 is started, the third driving motor 74 rotates to drive the third driving gear 75 to rotate, the third driving gear 75 rotates to drive the third outer gear ring 76 to synchronously rotate, thereby driving the plugging plate 73 to rotate, so that the plugging plate 73 plugs the through hole 72, at this time, the next batch of tea leaves can be dried while the tea leaves are screened, thereby improving the production efficiency.

[0044] As Figures 1 to 9As shown, the adjusting assembly 5 comprises an adjusting cylinder 51 coaxially sleeved outside the screen cylinder 31, a plurality of second screen holes 511 are uniformly arranged on the adjusting cylinder 51 along the length direction of the adjusting cylinder 51, an adjusting rail 52 is fixedly installed on the support frame 12, a first adjusting seat 53 is installed on the top of the partition plate 32, the first adjusting seat 53 is slidingly installed in the adjusting rail 52, an adjusting lead screw 54 is rotatably installed on the adjusting rail 52, the first adjusting seat 53 is threadedly connected with the adjusting lead screw 54, an adjusting motor 55 is installed at one end of the adjusting rail 52, the output shaft of the adjusting motor 55 is coaxially connected with the adjusting lead screw 54, a second adjusting seat 56 in the shape of a ring is rotatably installed on the partition plate 32, the adjusting cylinder 51 is coaxially rotatably installed on the second adjusting seat 56, an adjusting arc-shaped slot 57 is arranged on the second adjusting seat 56, an adjusting block 571 is slidingly installed in the adjusting arc-shaped slot 57, one end of the adjusting block 571 is connected with the adjusting cylinder 51, a reciprocating lead screw 58 is fixedly installed on the second adjusting seat 56, a driving block 59 is slidingly installed on the second adjusting seat 56, one end of the driving block 59 is slidingly installed in a sliding slot on the reciprocating lead screw 58, the other end of the driving block 59 is installed with a push rod 591, the push rod 591 abuts against the adjusting block 571, a second spring 572 is installed in the adjusting arc-shaped slot 57, the other end of the second spring 572 is connected with the adjusting block 571, an electromagnetic lock tongue 593 is further installed on the second adjusting seat 56, the lock tongue of the electromagnetic lock tongue 593 is inserted into the first screen hole 311 on the screen cylinder 31.When in use, when it is needed to prolong the overall length of the screening cylinder 31, the adjusting motor 55 is started, and the adjusting motor 55 rotates to drive the adjusting lead screw 54 to rotate synchronously, the adjusting lead screw 54 rotates to drive the first adjusting seat 53 to slide along the length direction of the adjusting rail 52, the first adjusting seat 53 moves to drive the partition plate 32 to move synchronously, the partition plate 32 moves to drive the adjusting cylinder 51 to move synchronously, so as to adjust the overall length of the screening cylinder 31 and the adjusting cylinder 51, and then prolong the moving time of the tea leaves on the screening cylinder 31 and the adjusting cylinder 51 as a whole, improve the screening effect of the tea leaves, and meanwhile, the partition plate 32 moves to adjust the separation of the tea leaves of different size ranges by the partition plate 32, so as to collect the tea leaves of the required size range together, when it is needed to adjust the size of the first screen hole 311 on the screening cylinder 31, in the embodiment, the electromagnetic lock tongue 593 is of the energized unlocking type electromagnetic lock, the electromagnetic lock tongue 593 is energized to make the lock tongue retract, so that the adjusting cylinder 51 can move, and then the adjusting motor 55 is started, the adjusting motor 55 rotates to drive the reciprocating lead screw 58 to rotate synchronously, the reciprocating lead screw 58 rotates to drive the driving block 59 to move along the length direction of the reciprocating lead screw 58, the driving block 59 moves to drive the push rod 591 to move synchronously, the push rod 591 drives the adjusting cylinder 51 to move along the adjusting arc-shaped slot 57, so that the second screen hole 511 is dislocated with the first screen hole 311, that is, the adjusting cylinder 51 partially shields the first screen hole 311, so as to reduce the size of the first screen hole 311, and then the size of the screened tea leaves can be adjusted according to the production requirement.

[0045] As shown in Figures 1 to 9 The inside of the screening cylinder 31 is coaxially provided with a rotating shaft 8, the rotating shaft 8 is provided with a spiral conveying blade 81, and the supporting frame 12 is provided with a fourth driving motor 82 for driving the rotating shaft 8 to rotate; when in use, the fourth driving motor 82 is started, and the fourth driving motor 82 rotates to drive the spiral conveying blade 81 to rotate synchronously, the spiral conveying blade 81 drives the tea leaves to slowly move along the length direction of the screening cylinder 31, and the first screen holes 311 of different sizes on the screening cylinder 31 screen the tea leaves during the slow movement of the tea leaves, and the spiral conveying blade 81 can avoid the tea leaves from moving too fast on the screening cylinder 31 to a certain extent, so as to avoid the poor screening effect of the tea leaves.

[0046] As shown in Figures 1 to 9As shown, the inclination assembly 9 comprises a power motor 91, a limiting slide rail 92, a driving seat 93, a connecting rod 94 and a driving screw rod 95, the limiting slide rail 92 is fixedly installed on the base 1, the driving seat 93 is slidingly installed on the limiting slide rail 92, the driving screw rod 95 is rotatably installed in the limiting slide rail 92 and is threadedly connected with the driving seat 93, one end of the connecting rod 94 is hingedly connected with the driving seat 93 and the other end is hingedly connected with the bottom of the mounting seat 11, the power motor 91 is installed at one end of the limiting slide rail 92 and the output shaft of the power motor 91 is coaxially connected with the driving screw rod 95, and the end of the mounting seat 11 away from the connecting rod 94 is hingedly connected with the base 1; in use, the power motor 91 is started, the power motor 91 drives the driving screw rod 95 to rotate synchronously, so that the driving screw rod 95 drives the driving seat 93 to slide along the length direction of the limiting slide rail 92, and in the process of movement of the driving seat 93, the mounting seat 11 is driven by the connecting rod 94 to rotate from the horizontal state to the inclined state, so that the tea is discharged from the drying cylinder 21 into the sieve cylinder 31 for screening, after use, the power motor 91 is started again, in the process of rotation of the power motor 91, the driving screw rod 95 is driven to rotate reversely, so that the driving seat 93 is reversely slid along the length direction of the limiting slide rail 92, so that the mounting seat 11 in the inclined state is moved to the horizontal state more stably.

[0047] As shown in Figures 1 to 9 The rotating shaft 8 is hollow, a plurality of air jet heads 83 are uniformly installed on the rotating shaft 8 along the length direction of the rotating shaft 8, the air jet heads 83 are communicated with the inside of the rotating shaft 8, the air pump 831 is installed on the mounting seat 11, and the air pump 831 is communicated with the rotating shaft 8 through the air conveying pipe; in use, the air pump 831 is started, the air pump 831 pressurizes the compressed air into the hollow rotating shaft 8, and then the compressed air is sprayed out through the air jet heads 83, so that the inside of the sieve cylinder 31 is cleaned.

[0048] As shown in Figures 1 to 9 A plurality of collecting hoppers 84 are uniformly installed on the mounting seat 11, the collecting hoppers 84 are located between the two partition plates 32, one side of the collecting hoppers 84 is hollow, and the movable hopper 85 is slidingly installed in the inside of the collecting hoppers 84, and the other side of the movable hopper 85 is fixedly connected with the partition plate 32; in the use process, when the adjustment assembly 5 drives the partition plates 32 to move to adjust the overall length of the sieve cylinder 31, in the process of movement of the partition plates 32, the movable hopper 85 is synchronously moved, so that the collecting hoppers 84 and the movable hopper 85 collectively collect the screened tea.

[0049] As shown in Figures 1 to 9As shown, the guide frame 86 is slidably mounted on the mounting seat 11, and the guide plate 87 is mounted on the guide frame 86, and the top of the guide frame 86 is connected with the partition plate 32 close to the outlet end of the screen cylinder 31; in use, when the adjusting assembly 5 adjusts the overall length of the screen cylinder 31, the guide frame 86 is driven to move synchronously, so that the tea leaves or impurities with a size larger than the size of the first screen hole 311 on the screen cylinder 31 are discharged along the guide plate 87.

[0050] The implementation principle of the embodiment is that the staff adds the tea leaves to be screened from the top of the feeding hopper 13, so that the tea leaves enter the drying and primary screening assembly 2, the drying and primary screening assembly 2 removes the excess moisture on the tea leaves, the mounting seat 11 is driven by the tilting assembly 9 to rotate from the horizontal state to the inclined state, so that the tea leaves are conveniently screened in the grading and screening assembly 3 from the drying and primary screening assembly 2, and since the first screen hole 311 on the screen cylinder 31 gradually increases along the length direction of the screen cylinder 31, the smaller tea leaves are first separated from the screen cylinder 31, and the tea leaves with a larger size are separated from the end of the screen cylinder 31 away from the drying and primary screening assembly 2, so that the tea leaves are separated.

[0051] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Any person skilled in the art can make many possible changes and modifications to the technical solution of the present application, or modify it into equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of the present application. Therefore, any modification, equivalent change and modification made to the above embodiment according to the technical solution of the present application, without departing from the scope of the technical solution of the present application, all belong to the protection scope of the technical solution.

Claims

1. A tea leaf screening apparatus characterised in that: The utility model provides a kind of drying and screening device, including base (1), the mounting seat (11) is rotationally arranged on the base (1), the base (1) is provided with the inclination component (9) for driving mounting seat (11) rotation, the support frame (12) is provided on the mounting seat (11), the support frame (12) is sequentially provided with upper hopper (13), drying initial screen component (2) and grading screening component (3), the grading screening component (3) includes sieve cylinder (31), multiple first screen holes (311) are evenly provided on the sieve cylinder (31), the aperture of multiple first screen holes (311) gradually increases along the length direction of sieve cylinder (31), the support frame (12) is evenly provided with multiple partition plates (32) for separating sieve cylinder (31), the support frame (12) is provided with cleaning component (4), the cleaning component (4) includes first outer gear (41) and first drive motor (42), the first outer gear (41) is coaxially arranged on sieve cylinder (31), the first drive motor (42) is fixedly arranged on the support frame (12), first drive gear (43) is coaxially arranged on the output shaft of first drive motor (42), and the first drive gear (43) is engaged with first outer gear (41), cleaning seat (44) is slidably arranged between the adjacent two partition plates (32), the cleaning seat (44) is evenly provided with multiple dredging rods (441), the top of the cleaning seat (44) is provided with first spring (442), the other end of the first spring (442) is connected with the top of the partition plate (32), the top of the cleaning seat (44) is provided with rack (45), the output shaft of the first drive motor (42) is also coaxially provided with extension shaft (46), half gear (47) is coaxially arranged on the extension shaft (46), and the half gear (47) is engaged with rack (45), and the outer wall of the sieve cylinder (31) is provided with adjustment component (5) for adjusting the length of sieve cylinder (31) and the opening size of first screen hole (311).

2. A tea screening apparatus as claimed in claim 1, wherein: The drying initial screen component (2) includes drying cylinder (21), the inner wall of the drying cylinder (21) is evenly provided with multiple material lifting plates (22), the inner wall of the drying cylinder (21) is evenly provided with multiple protrusions (23) between two material lifting plates (22), the drying cylinder (21) is evenly provided with multiple filter holes (24), the outer wall of the drying cylinder (21) is evenly provided with multiple heating circular ring wires (25) along the length direction of itself, the mounting seat (11) is provided with waste hopper (26) for collecting small waste in the drying cylinder (21), the top of the waste hopper (26) is provided with cleaning brush (27) for dredging the drying cylinder (21), the mounting seat (11) is provided with second outer gear (28), the mounting seat (11) is provided with second drive motor (29), the output shaft of the second drive motor (29) is coaxially provided with second drive gear (291), and the second drive gear (291) is engaged with second outer gear (28).

3. A tea screening apparatus as claimed in claim 2, wherein: The support frame (12) is provided with an exhaust assembly (6), the exhaust assembly (6) comprises a smoke hood (61) and a fan (62), the smoke hood (61) is fixedly arranged on the support frame (12) and located at the top of the drying cylinder (21), the fan (62) is communicatedly arranged at the top of the smoke hood (61), and the other end of the fan (62) is communicatedly provided with an exhaust pipe (63).

4. A tea screening apparatus as claimed in claim 1, wherein: The support frame (12) is provided with a closing assembly (7) for closing the drying cylinder (21), the closing assembly (7) comprises a closing seat (71), the closing seat (71) is fixedly arranged on the support frame (12), one end of the closing seat (71) is rotatably connected with the drying cylinder (21), the other end is rotatably connected with the sieve cylinder (31), a through hole (72) is formed in the closing seat (71), a plugging plate (73) for plugging the through hole (72) is rotatably arranged on the closing seat (71), a third driving motor (74) is fixedly arranged on the closing seat (71), a third driving gear (75) is coaxially arranged on the output shaft of the third driving motor (74), a third outer gear ring (76) is fixedly arranged on the plugging plate (73), and the third driving gear (75) is meshed with the third outer gear ring (76).

5. A tea screening apparatus as claimed in claim 1, wherein: The adjusting assembly (5) comprises an adjusting cylinder (51) coaxially sleeved outside the screen cylinder (31), a plurality of second screen holes (511) are uniformly formed on the adjusting cylinder (51) along the length direction of the adjusting cylinder (51), an adjusting rail (52) is fixedly arranged on the support frame (12), a first adjusting seat (53) is arranged at the top of the partition plate (32), the first adjusting seat (53) is slidingly arranged in the adjusting rail (52), an adjusting screw rod (54) is rotatably arranged on the adjusting rail (52), the first adjusting seat (53) is in threaded connection with the adjusting screw rod (54), an adjusting motor (55) is arranged at one end of the adjusting rail (52), the output shaft of the adjusting motor (55) is coaxially connected with the adjusting screw rod (54), a second adjusting seat (56) in the shape of a ring is rotatably arranged on the partition plate (32), the adjusting cylinder (51) is coaxially rotatably arranged on the second adjusting seat (56), an adjusting arc-shaped groove (57) is formed on the second adjusting seat (56), an adjusting block (571) is slidingly arranged in the adjusting arc-shaped groove (57), one end of the adjusting block (571) is connected with the adjusting cylinder (51), a reciprocating screw rod (58) is fixedly arranged on the second adjusting seat (56), a driving block (59) is slidingly arranged on the second adjusting seat (56), one end of the driving block (59) is slidingly arranged in a sliding groove on the reciprocating screw rod (58), the other end of the driving block (59) is provided with a push rod (591), the push rod (591) abuts against the adjusting block (571), a second spring (572) is arranged in the adjusting arc-shaped groove (57), the other end of the second spring (572) is connected with the adjusting block (571), an electromagnetic lock tongue (593) is further arranged on the second adjusting seat (56), the lock tongue of the electromagnetic lock tongue (593) is inserted into the first screen hole (311) on the screen cylinder (31).

6. A tea screening apparatus as claimed in claim 1, wherein: The inside of the screen cylinder (31) is coaxially provided with a rotating shaft (8), the rotating shaft (8) is provided with a spiral conveying blade (81), the support frame (12) is provided with a fourth driving motor (82) for driving the rotating shaft (8) to rotate.

7. A tea screening apparatus as claimed in claim 1, wherein: The inclination assembly (9) comprises a power motor (91), a limiting sliding rail (92), a driving seat (93), a connecting rod (94) and a driving screw rod (95), the limiting sliding rail (92) is fixedly arranged on the base (1), the driving seat (93) is slidingly arranged on the limiting sliding rail (92), the driving screw rod (95) is rotatably arranged in the limiting sliding rail (92), and the driving screw rod (95) is in threaded connection with the driving seat (93), one end of the connecting rod (94) is hinged with the driving seat (93), the other end of the connecting rod (94) is hinged with the bottom of the mounting seat (11), the power motor (91) is arranged at one end of the limiting sliding rail (92), and the output shaft of the power motor (91) is coaxially connected with the driving screw rod (95), and the mounting seat (11) is hinged with the base (1) away from one end of the connecting rod (94).

8. A tea screening apparatus as claimed in claim 6, wherein: The rotating shaft (8) is hollow, a plurality of air jet heads (83) are uniformly arranged on the rotating shaft (8) along the length direction of the rotating shaft (8), the air jet heads (83) are communicated with the inside of the rotating shaft (8), and the mounting base (11) is provided with an air pump (831), and the air pump (831) is communicated with the rotating shaft (8) through a gas conveying pipe.

9. A tea screening apparatus as claimed in claim 5, wherein: A plurality of collecting hoppers (84) are uniformly arranged on the mounting base (11), the collecting hoppers (84) are located between the two partition plates (32), one side of the collecting hoppers (84) is hollow, and a movable hopper (85) is slidably arranged in the inside of the collecting hopper (84), and the other side of the movable hopper (85) is fixedly connected with the partition plate (32).

10. A tea screening apparatus as claimed in claim 9, wherein: A material guide frame (86) is slidably arranged on the mounting base (11), the material guide frame (86) is provided with a material guide plate (87), and the top of the material guide frame (86) is connected with the partition plate (32) close to the outlet end of the screen cylinder (31).

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