A layered tea drying equipment with anti-accumulation function

Abstract

The present application relates to the field of tea production and processing, and discloses a layered tea uniform drying equipment with an anti-accumulation function, comprising: a drying bin, consisting of four drying chambers, the four drying chambers forming a cross shape and interconnected, the temperature in each drying chamber being different; a multi-layer conveying assembly, provided with four groups and respectively installed in each drying chamber, the multi-layer conveying assembly comprising a number of horizontally arranged conveyor belts, the plurality of conveyor belts being distributed at equal intervals from top to bottom, and the conveying directions of two adjacent conveyor belts being opposite, with one end of the bottom conveyor belt extending out of the drying chamber; a bin separation platform, located at the connection point of the four drying chambers, and located below the feed port of the drying bin, and used to convey the tea entering the drying bin to the conveyor belt of the designated drying chamber according to the drying temperature requirements. The present application realizes the ability to convey tea of different humidity levels to the drying chamber of the required temperature, and the tea can be turned over multiple times, which is conducive to uniform drying.

Description

Technical Field

[0001] The present application relates to the field of tea production and processing, and in particular to a layered tea uniform drying device with an anti-stacking function. Background Art

[0002] Drying is a crucial step in tea production, primarily to remove moisture from the tea leaves while also achieving their desired shape and oxidation resistance. Tea is typically dried in a drying oven, powered by either electricity or natural gas. Regardless of the energy source, it is ultimately converted into heat and released into the drying oven. The tea leaves within the drying oven absorb this heat, converting it into internal energy, gradually drying the tea leaves.

[0003] Currently, when drying tea leaves, the tea leaves are first spread on a drying tray, and then the drying tray is placed in a drying box, and then the drying temperature is set to dry the tea leaves.

[0004] However, due to the picking time or weather reasons, the humidity of the tea leaves is different even if they are picked on the same day. Therefore, drying ovens with different temperatures are needed to dry tea leaves with different humidity levels separately. Therefore, it is necessary to pick enough tea leaves with similar humidity levels to meet the requirements of drying in the same drying oven, which affects production efficiency. In addition, the tea leaves on the drying tray cannot be turned over and are prone to accumulation, making it difficult for some tea leaves to be dried evenly. Summary of the Invention

[0005] The present application provides a layered tea drying equipment with anti-stacking function, which solves the technical problems in the prior art that tea leaves with similar humidity levels need to be picked in order to be dried in the same drying box, and the tea leaves on the drying tray cannot be turned over and cannot be dried evenly. The application realizes the ability to transport tea leaves of different humidity levels to a drying room with the required temperature, and the tea leaves can be turned over multiple times, which is conducive to uniform drying.

[0006] The present application provides a layered tea uniform drying equipment with an anti-accumulation function, comprising: a drying bin, consisting of four drying chambers, the four drying chambers forming a cross shape and interconnected, the temperature in each drying chamber being different; a multi-layer conveying assembly, provided with four groups and respectively installed in each of the drying chambers, the multi-layer conveying assembly comprising a plurality of horizontally arranged conveyor belts, the plurality of conveyor belts being distributed at equal intervals from top to bottom, and the conveying directions of two adjacent conveyor belts being opposite, the tea leaves falling from the end of the upper conveyor belt to the end of the lower conveyor belt, and one end of the bottom conveyor belt extending out of the drying chamber and being used to convey the dried tea leaves to the outside of the drying bin; a bin separation platform, located at the connecting point of the four drying chambers and below the feed port of the drying bin, and being used to convey the tea leaves entering the drying bin to the conveyor belt of the designated drying chamber according to the drying temperature requirements.

[0007] Furthermore, the bin distribution platform includes: a base plate, installed at the bottom of the drying bin and located at the connection point of the four drying chambers; a rectangular frame plate, horizontally arranged and located above the base plate; a flip plate, located above the rectangular frame plate; a flip mechanism, installed between the base plate and the flip plate, and used to flip the flip plate toward the four drying chambers respectively, and flip it to be inclined with respect to the upper surface of the conveyor belt, and the side of the lowest point of the flip plate in the inclined state is located directly above the conveyor belt; a rigid chain lifting mechanism, installed between the base plate and the rectangular frame plate, and used to lift and lower the rectangular frame plate.

[0008] Furthermore, the flip mechanism includes: a bracket, fixedly installed in the rectangular frame plate, and the height of the middle of the bracket is lower than the height of the bottom surface of the rectangular frame plate; a lower support, fixedly installed on the upper surface of the middle part of the bracket; an upper support, fixedly installed in the middle part of the lower surface of the flip plate; a lower universal shaft, installed in the lower support; an upper universal shaft, installed in the upper support; a lower swing rod, one end of which is hinged on the lower universal shaft; an upper swing rod, one end of which is hinged on the upper universal shaft, and the other end is hinged to the end of the lower swing rod away from the lower universal shaft; a motor 1, installed on the lower universal shaft To the shaft, and the output end is connected with the input end of the lower universal shaft; there are four suspension rods, which are respectively fixedly mounted on the edge of the bottom surface of the rectangular frame plate; there are four strip seats, which are respectively fixedly mounted on the upper surface of the four side rods of the rectangular frame plate, and the upper surface of the strip seats is provided with a semicircular groove for the suspension rod to be placed in; there are four telescopic cylinders, which are respectively fixedly mounted on the lower surfaces of the four side rods of the rectangular frame plate; a pressure plate, the end of the telescopic rod of each telescopic cylinder is fixed with the pressure plate, and the pressure plate is used to press the suspension rod in the semicircular groove.

[0009] Furthermore, the pressure plate is U-shaped and is located on the outside of the side rod of the rectangular frame plate. One end of the pressure plate is located above the rectangular frame plate, and the other end is located below the rectangular frame plate. The telescopic cylinder is installed on the inner side of the side rod of the rectangular frame plate, and the end of the telescopic rod is connected to the end of the pressure plate located below the rectangular frame plate. The pressure plate is located at the end above the rectangular frame plate and is used to press the suspension rod.

[0010] Furthermore, a circumferential groove is provided on the circumferential surface of the suspension shaft rod, and the circumferential groove is used for inserting the pressure plate.

[0011] Furthermore, the bracket is composed of three support rods with Y-shaped cross-sections, and the three support rods are respectively fixed on three side rods of the rectangular frame plate, and the motor is close to the side of the rectangular frame plate that is not occupied by the support rods.

[0012] Furthermore, the rigid chain lifting mechanism includes: a cross rod, which is provided in several groups and is connected between the base plate and the rectangular frame plate from top to bottom; a chain box, the chain boxes are symmetrically provided on both sides of the base plate; a rigid chain, one end of which is installed on the rectangular frame plate and the other end is wound in the chain box; an engagement box, which is installed in the middle of the base plate and is used to engage the rigid chains in the chain boxes on both sides; a second motor, which is installed on the base plate and is used to drive the engagement box to start engagement.

[0013] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0014] Due to the combination of drying rooms with different drying temperatures, the tea leaves transported to the sub-bin table will be transported to the designated drying room according to the drying needs. Then the tea leaves will be transported on different conveyor belts in the drying room. The tea leaves can be turned over so that they can be dried evenly. This makes it possible to transport tea leaves of different humidity levels to the drying room with the required temperature, and the tea leaves can be turned over multiple times, which is conducive to uniform drying.

[0015] Figure 1 This is a schematic diagram of the overall structure of the drying equipment in the embodiment of the present application;

[0016] Figure 2 This is a schematic diagram of four drying chambers in a drying bin in an embodiment of the present application;

[0017] Figure 3 Schematic diagram of the multi-layer conveying assembly in the drying chamber in the embodiment of the present application

[0018] Figure 4 This is a schematic diagram of the overall structure of the storage platform in the embodiment of the present application;

[0019] Figure 5 This is a schematic structural diagram of the flipping mechanism in an embodiment of the present application;

[0020] In the figure: 101, lifting belt; 102, steering belt; 103, rolling mill; 1, drying bin; 11, drying chamber; 2, multi-layer conveying assembly; 21, conveyor belt; 3, sub-bin platform; 31, base plate; 32, rectangular frame plate; 33, flip plate; 34, flip mechanism; 341, bracket; 342, lower support; 343, upper support; 344, lower universal joint; 345, upper universal joint; 346, lower swing rod; 347, upper swing rod; 348, motor 1; 349, suspension rod; 3491, circumferential groove; 3410, strip seat; 34101, semicircular groove; 3411, telescopic cylinder; 3412, pressing plate; 35, rigid chain lifting mechanism; 351, cross rod; 352, chain box; 353, rigid chain; 354, closing box; 355, motor 2. DETAILED DESCRIPTION

[0021] In order to better understand the technical solution of the present application, the technical solution of the present application will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0022] Reference Figures 1 to 3 A layered tea uniform drying equipment with anti-accumulation function includes a drying bin 1, a multi-layer conveying component 2, a bin platform 3, a lifting belt 101, a turning belt 102 and a rolling mill 103.

[0023] The drying bin 1 consists of four drying chambers 11, which are rectangular. The four drying chambers 11 form a cross shape and are interconnected. The top of the connecting point of the four drying chambers 11 is the feed port of the drying bin 1. The four drying chambers 11 can be adjusted to different drying temperatures to adapt to the drying of tea leaves with different humidity.

[0024] There are four groups of multi-layer conveying components 2, and the four groups of multi-layer conveying components 2 are respectively installed in four drying chambers 11. Each group of multi-layer conveying components 2 includes several horizontally arranged conveyor belts 21. The several conveyor belts 21 are distributed at equal intervals from top to bottom, and the conveying directions of two adjacent conveyor belts 21 are opposite. The conveying direction of the uppermost conveyor belt 21 is from the connection point of the four drying chambers 11 to the outer end of the drying chamber 11. The tea leaves fall from the end of the upper conveyor belt 21 to the end of the lower conveyor belt 21, and one end of the bottom conveyor belt 21 extends out of the drying chamber 11. The bottom conveyor belt 21 is used to transport the dried tea leaves to the outside of the drying bin 1.

[0025] A rolling roller 103 is installed on each conveyor belt 21. The rolling roller 103 is located at the starting end of the conveyor belt 21. The rolling roller 103 can be driven to rotate by a driving motor. The thorns on the rolling roller 103 can spread the tea leaves on the conveyor belt 21 to prevent the tea leaves from piling up on the conveyor belt 21.

[0026] The dividing platform 3 is installed in the drying bin 1 and is located at the connecting point of the four drying chambers 11 and below the feed port of the drying bin 1. The dividing platform 3 is used to transport the tea entering the drying bin 1 to the conveyor belt 21 of the designated drying chamber 11 according to the drying temperature requirements.

[0027] The lifting belt 101 is installed outside the drying chamber 1 . The lifting belt 101 is inclined. One end of the lifting belt 101 is close to the ground, and the other end extends above the top surface of the drying chamber 1 .

[0028] The steering belt 102 is installed on the top surface of the drying bin 1. The steering belt 102 is arranged horizontally. One end of the rotating belt is located below the top of the lifting belt 101, and the other end is located above the feed port of the drying bin 1.

[0029] When the tea needs to be dried, the tea is placed on the lifting belt 101, and the lifting belt 101 is used to transport the tea to the turning belt 102. The turning belt 102 can transport the tea to the feed port of the drying bin 1, and the tea will be transported to the separation platform 3. When enough weight of tea is gathered on the separation platform 3, the separation platform 3 can be used to transport the tea to the designated drying bin 1.

[0030] Reference Figure 4 The compartment platform 3 includes a base plate 31, a rectangular frame plate 32, a flip plate 33, a flip mechanism 34, and a rigid chain 353 lifting mechanism 35. The base plate 31 is fixedly installed at the bottom of the drying bin 1, and the base plate 31 is located at the connection point of the four drying chambers 11; the rectangular frame plate 32 is a rectangular frame with four equilateral rods, and the rectangular frame plate 32 is located above the base plate 31, and the rectangular frame plate 32 is arranged horizontally; the flip plate 33 is an equilateral plate, and the four corners are chamfered right angles. Baffles are fixed on the chamfered edges to guide the tea leaves to move out from the side of the flip plate 33; the flip mechanism 34 is installed on the base plate 31 and the flip plate 33; the rigid chain 353 lifting mechanism 35 is installed between the base plate 31 and the rectangular frame plate 32, and is used to lift the rectangular frame plate 32 so that the rectangular frame plate 32 moves up and down at the connection point of the four drying chambers 11.

[0031] Reference Figure 5 The flip mechanism 34 includes a bracket 341, a lower support 342, an upper support 343, a lower universal joint 344, an upper universal joint 345, a lower swing arm 346, an upper swing arm 347, a motor 348, a suspension rod 349, a bar seat 3410, a telescopic cylinder 3411, and a pressure plate 3412. The bracket 341 is composed of three Y-shaped cross-section rods, each fixed to the three side rods of the rectangular frame plate 32. The ends of the two same-side ends of the Y-shaped rods are fixed to the bottom surface of the rectangular frame plate 32, while the end of the single end is located at the center of the rectangular frame plate 32 and is lower than the bottom surface of the rectangular frame plate 32. As a result, there is a large gap between the frame edge of the rectangular frame plate 32 without a fixed rod and the bracket 341. The lower support 342 is fixedly mounted on the upper surface of the middle portion of the bracket 341. The upper support 343 is fixedly mounted on the middle portion of the lower surface of the flip plate 33. A lower universal joint 344 is mounted in the lower support 342. An upper universal joint 345 is mounted in the upper support 343. A lower swing arm 346 has one end hinged to the lower universal joint 344, with the other end facing the flip plate 33. An upper swing arm 347 has one end hinged to the upper universal joint 345, and the other end hinged to the end of the lower swing arm 346 away from the lower universal joint 344. Motor 1 348 is mounted on the lower universal joint 344, with its output end connected to the input end of the lower universal joint 344. Motor 1 348 is located in the gap between the edge of the rectangular frame 32 (where no supporting rods are fixed) and the support 341, allowing sufficient space for motor 1 348 to swing.

[0032] The suspension rod 349 is in the shape of a round rod. There are four suspension rods 349. The four suspension rods 349 are respectively located below the four sides of the rectangular frame plate 32. The length direction of the suspension rod 349 is consistent with the length direction of the side of the rectangular frame plate 32. A circumferential groove 3491 is opened on the circumference of the suspension rod 349. The circumferential groove 3491 is opened along the circumference of the suspension rod 349 and is located in the middle of the suspension rod 349.

[0033] There are four strip seats 3410, which are fixedly installed on the upper surfaces of the four side bars of the rectangular frame plate 32 respectively, and the length direction of the strip seat 3410 is consistent with the length direction of the side bars of the rectangular frame plate 32. The upper surface of the strip seat 3410 is provided with a semicircular groove 34101 for placing the suspension rod 349.

[0034] There are four pressing plates 3412, which are respectively arranged at the four side bars of the rectangular frame plate 32. The pressing plates 3412 are U-shaped and are located on the outside of the side bars of the rectangular frame plate 32. The opening of the pressing plate 3412 faces the side bars of the rectangular frame plate 32. One end of the pressing plate 3412 is located above the rectangular frame plate 32, and the other end is located below the rectangular frame plate 32. The pressing plate 3412 is located at one end above the rectangular frame plate 32 and is used to press the suspension shaft rod 349.

[0035] There are four telescopic cylinders 3411, which are respectively arranged at the four side rods of the rectangular frame plate 32. The telescopic cylinders 3411 are installed on the inner side of the side rods of the rectangular frame plate 32, and the ends of the telescopic rods in the telescopic cylinders 3411 are connected to the end of the pressure plate 3412 located at the lower end of the rectangular frame plate 32.

[0036] When it is necessary to flip the flip plate 33 to the designated drying chamber 11, the telescopic cylinder 3411 corresponding to the designated drying chamber 11 will remain stationary, so that the pressure plate 3412 on the telescopic cylinder 3411 is in a state of pressing the suspension rod 349, and the other three telescopic cylinders 3411 are started, so that the other three pressure plates 3412 are released from pressing the suspension rod 349, and then the motor 1 348 is started. The start of the motor 1 348 will drive the lower universal shaft 344 on the lower support 342 to rotate, thereby causing the lower swing rod 346 to swing, so that the flip plate 33 will flip around the axis of the suspension rod 349 in the pressing state, so that the tea leaves on the flip plate 33 can be transported to the conveyor belt 21, and when it is necessary to transport the tea leaves to other drying chambers 11, it is only necessary to press the corresponding suspension rod 349.

[0037] Reference Figure 4As shown, the rigid chain 353 lifting mechanism 35 includes a cross bar 351, a chain box 352, a rigid chain 353, an engagement box 354, and a second motor 355. Several groups of cross bars 351 are provided and connected from top to bottom between the base plate 31 and the rectangular frame plate 32. Two chain boxes 352 are provided, and the two chain boxes 352 are symmetrically mounted on both sides of the base plate 31. A rigid chain 353 is wound around each chain box 352, with one end of the rigid chain 353 mounted on the rectangular frame plate 32 and the other end wound around the chain box 352. The engagement box 354 is installed in the middle of the base plate 31, located midway between the two chain boxes 352. The engagement box 354 is used to engage the rigid chains 353 in the two chain boxes 352. The second motor 355 is installed on the base plate 31 and is used to drive the engagement box 354 to start engaging the rigid chains 353 on both sides.

[0038] The rectangular frame plate 32 can be moved up and down by using the rigid chain 353 lifting mechanism 35. Therefore, when the tea leaves conveyed to the flip plate 33 do not need to be dried for a long time, the rigid chain 353 lifting mechanism 35 is used to move the flip plate 33 to the conveyor belt 21 below the drying chamber 11, and then the flip mechanism 34 is used to flip the tea leaves on the flip plate 33 to the conveyor belt 21 below, thereby reducing the drying time of the tea leaves to meet the needs of tea leaves that do not need to be dried for a long time.

[0039] This application can explain its functional principles through the following operation methods:

[0040] When the tea leaves need to be dried, they are placed on the lifting belt 101 and transported to the turning belt 102 by the lifting belt 101. The turning belt 102 can transport the tea leaves to the feed port of the drying bin 1, and the tea leaves will be transported to the flip plate 33 of the bin platform 3.

[0041] When tea leaves of sufficient weight are gathered on the flip plate 33, the telescopic cylinder 3411 corresponding to the designated tea drying chamber 11 in the flip mechanism 34 is controlled to remain stationary, and the other three telescopic cylinders 3411 are started, so that the other three pressing plates 3412 are released from the pressure on the suspension rod 349, and then the motor 1 348 is started. The start of the motor 1 348 will drive the lower universal shaft 344 on the lower support 342 to rotate, thereby causing the lower swing rod 346 to swing, thereby causing the flip plate 33 to flip around the axis of the suspension rod 349 in the pressing state, so that the tea leaves on the flip plate 33 can be transported to the conveyor belt 21 at the top of the designated drying chamber 11.

[0042] As the tea leaves are transported on different conveyor belts 21 in the drying chamber 11, they can be turned over so that they can be dried evenly. In addition, when tea leaves of other humidity levels are picked and require drying at other drying temperatures, it is only necessary to adjust the pressing plate 3412 corresponding to the required drying chamber 11 to the state of pressing the suspension rod 349 to transport the tea leaves to the required drying chamber 11. This is convenient and quick, and is conducive to improving the drying efficiency of the tea leaves.

[0043] In addition, when the tea leaves transported to the flip plate 33 do not need to be dried for a long time, the rigid chain 353 lifting mechanism 35 is used to move the flip plate 33 to the conveyor belt 21 below the drying chamber 11, and then the flip mechanism 34 is used to flip the tea leaves on the flip plate 33 to the conveyor belt 21 below, thereby reducing the drying time of the tea leaves to meet the needs of tea leaves that do not need to be dried for a long time.

[0044] Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.

[0045] The above is only a preferred specific implementation method of the embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and concept of the present application within the technical scope disclosed in the present application, and they should be covered by the scope of protection of the present application.

Claims

1. A layered tea drying equipment with anti-stacking function, characterized in that: include: The drying chamber (1) is composed of four drying chambers (11), the four drying chambers (11) are arranged in a cross shape and are interconnected, and the temperature in each of the drying chambers (11) is different; A multi-layer conveying assembly (2) is provided with four groups and is respectively installed in each of the drying chambers (11). The multi-layer conveying assembly (2) includes a plurality of horizontally arranged conveyor belts (21). The plurality of conveyor belts (21) are distributed at equal intervals from top to bottom, and the conveying directions of two adjacent conveyor belts (21) are opposite. Tea leaves fall from the end of the upper conveyor belt (21) to the end of the lower conveyor belt (21), and one end of the bottom conveyor belt (21) extends out of the drying chamber (11) and is used to convey the dried tea leaves to the outside of the drying bin (1); The compartment separation platform (3) is located at the connection point of the four drying chambers (11) and below the feed port of the drying chamber (1), and is used to convey the tea leaves entering the drying chamber (1) to the conveyor belt (21) of the designated drying chamber (11) according to the drying temperature requirements; The compartment distribution platform (3) includes: A base plate (31) is installed at the bottom of the drying chamber (1) and is located at the connection point of the four drying chambers (11); A rectangular frame plate (32) is horizontally arranged and located above the base plate (31); A flip plate (33) is located above the rectangular frame plate (32); a turning mechanism (34) installed between the base plate (31) and the turning plate (33), and used to turn the turning plate (33) toward the four drying chambers (11) respectively, and to turn the turning plate (33) to be inclined with respect to the upper surface of the conveyor belt (21), and the side edge of the lowest point of the turning plate (33) in the inclined state is located directly above the conveyor belt (21); A rigid chain lifting mechanism (35) is installed between the base plate (31) and the rectangular frame plate (32) and is used to lift the rectangular frame plate (32).

2. The layered tea drying equipment with anti-stacking function according to claim 1, characterized in that: The turning mechanism (34) comprises: A bracket (341) is fixedly installed in the rectangular frame plate (32), and the height of the middle of the bracket (341) is lower than the height of the bottom surface of the rectangular frame plate (32); A lower support (342) is fixedly mounted on the upper surface of the middle portion of the bracket (341); An upper support (343) is fixedly mounted on the middle portion of the lower surface of the flip plate (33); A lower universal shaft (344) is installed in the lower support (342); An upper universal joint (345) is installed in the upper support (343); A lower swing rod (346), one end of which is hinged to the lower universal shaft (344); An upper swing rod (347), one end of which is hinged to the upper universal shaft (345), and the other end of which is hinged to an end of the lower swing rod (346) away from the lower universal shaft (344); Motor 1 (348), mounted on the lower universal shaft (344), with its output end connected to the input end of the lower universal shaft (344); Four suspension rods (349) are provided and are respectively fixedly mounted on the edges of the bottom surface of the rectangular frame plate (32); Four strip seats (3410) are provided and fixedly mounted on the upper surfaces of the four side bars of the rectangular frame plate (32), and the upper surfaces of the strip seats (3410) are provided with semicircular grooves (34101) for receiving the suspension rods (349); There are four telescopic cylinders (3411), which are respectively fixedly mounted on the lower surfaces of the four side bars of the rectangular frame plate (32); A pressing plate (3412) is fixed to the end of the telescopic rod of each telescopic cylinder (3411), and the pressing plate (3412) is used to press the suspension rod (349) in the semicircular groove (34101).

3. The layered tea drying equipment with anti-accumulation function as claimed in claim 2, characterized in that: The pressing plate (3412) is U-shaped and is located outside the side rod of the rectangular frame plate (32). One end of the pressing plate (3412) is located above the rectangular frame plate (32), and the other end is located below the rectangular frame plate (32). The telescopic cylinder (3411) is installed on the inner side of the side rod of the rectangular frame plate (32), and the end of the telescopic rod is connected to the end of the pressing plate (3412) located below the rectangular frame plate (32). The pressing plate (3412) is located at the end above the rectangular frame plate (32) and is used to press the suspension rod (349).

4. The layered tea drying equipment with anti-stacking function according to claim 2, characterized in that: A circumferential groove (3491) is provided on the circumferential surface of the suspension rod (349), and the circumferential groove (3491) is used for inserting the pressing plate (3412).

5. The layered tea drying equipment with anti-accumulation function as claimed in claim 2, characterized in that: The bracket (341) is composed of three Y-shaped support rods, which are respectively fixed to three side rods of the rectangular frame plate (32). The motor 1 (348) is close to the side of the rectangular frame plate (32) that does not occupy the support rods.

6. The layered tea drying equipment with anti-accumulation function according to claim 1, characterized in that: The rigid chain lifting mechanism (35) comprises: Cross bars (351) are provided in a plurality of groups and are connected between the base plate (31) and the rectangular frame plate (32) from top to bottom; A chain box (352), the chain box (352) being symmetrically arranged on both sides of the base plate (31); A rigid chain (353), one end of which is mounted on the rectangular frame plate (32) and the other end of which is wound in the chain box (352); An engagement box (354) is installed in the middle of the base plate (31) and is used to engage the rigid chains (353) in the chain boxes (352) on both sides; Motor 2 (355) is mounted on the base plate (31) and is used to drive the engagement box (354) to start engagement.

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