CN111891648A

CN111891648A - Lifting mechanism for drying machine

Info

Publication number: CN111891648A
Application number: CN202010682128.6A
Authority: CN
Inventors: 张书宏; 张利; 叶新国
Original assignee: Hefei Sanwu Mechanical Co ltd
Current assignee: Hefei Sanwu Mechanical Co ltd
Priority date: 2020-07-15
Filing date: 2020-07-15
Publication date: 2020-11-06

Abstract

The invention provides a lifting mechanism for a dryer, wherein a first channel and a second channel in a shell are arranged in parallel; the first channel is provided with a first feeding hole and a first discharging hole; the second channel is provided with a second feeding hole and a second discharging hole; the first hopper is slidably arranged in the first channel, and the second hopper is slidably arranged in the second channel; the fixed pulley is rotatably arranged at the top of the shell and is positioned between the first channel and the second channel; the transmission belt is matched on the fixed pulley, and two ends of the transmission belt are respectively connected with the first hopper and the second hopper; the driving piece is used for driving the fixed pulley to rotate in a reciprocating mode, after the first hopper reaches the bottom of the first channel, grains enter the first hopper from the first feeding hole, then the first hopper rises to lift the grains to the top of the first channel, after the second hopper reaches the bottom of the second channel, the grains enter the second hopper from the second feeding hole, and then the second hopper rises to lift the grains to the top of the second channel.

Description

Lifting mechanism for drying machine

Technical Field

The invention belongs to the field of dryers, and particularly relates to a lifting mechanism for a dryer.

Background

Hoist mechanism in the current drying-machine is equipped with the hopper in the hoist mechanism, and the hopper is taken the action of shovel and is got and shoveled grain into the hopper in, promotes grain to the drying-machine top again, and long-term shovel is got and is leaded to grain easy breakage, awaits urgent need to improve.

Disclosure of Invention

In order to solve the problems, the invention provides a lifting mechanism for a dryer, which comprises a shell, a first valve, a second valve, a first hopper, a second hopper, a first baffle, a second baffle, a fixed pulley, a transmission belt and a driving piece, wherein the first valve is arranged on the shell;

a first channel and a second channel are arranged in the shell and are arranged in parallel;

the bottom of the first channel is provided with a first feeding hole, a first valve is installed in the first feeding hole, and the top of the first channel is provided with a first discharging hole;

a second feed inlet is formed in the bottom of the second channel, a second valve is installed in the second feed inlet, and a second discharge outlet is formed in the top of the second channel;

the openings of the first feed inlet, the first discharge outlet, the second feed inlet and the second discharge outlet are in the same direction, and the openings of the first feed inlet, the first discharge outlet, the second feed inlet and the second discharge outlet are in the direction vertical to the length direction of the first channel;

the first hopper is slidably arranged in the first channel, the first hopper is provided with a first notch, the first baffle is rotatably connected with the bottom of the first notch, and a position covering the first notch is arranged in the rotating process of the first baffle;

the second hopper is slidably arranged in the second channel, the second hopper is provided with a second notch, the second baffle is rotatably connected with the bottom of the second notch, and a position for covering the second notch is arranged in the rotating process of the second baffle;

the fixed pulley is rotatably arranged at the top of the shell and is positioned between the first channel and the second channel;

the transmission belt is matched on the fixed pulley, and two ends of the transmission belt are respectively connected with the first hopper and the second hopper;

the driving piece is used for driving the fixed pulley to rotate in a reciprocating mode, and the fixed pulley has a first position and a second position in the rotating process, wherein:

the fixed pulley is arranged below the first position, the first hopper is positioned below the first feed inlet, the second hopper is positioned at the second discharge outlet, and the second baffle is positioned outside the second discharge outlet;

the fixed pulley is under the second position, and first hopper is located first discharge gate position, and first baffle is located first discharge gate outside, and the second hopper is located second feed inlet below.

Preferably, a first sensor and a second sensor are also included;

the first sensor is arranged at the bottom of the first channel and used for controlling the opening/closing of the first valve according to the sensing of the first hopper;

and a second sensor is arranged at the bottom of the second channel and is used for controlling the opening/closing of the second valve according to the sensing of the existence of the second hopper.

Preferably, the fixed pulley is in the first position, the top of the first hopper is at a distance L1 from the bottom of the first feeding hole, the time required for the first sensor to send a closing signal to the first valve until the first valve is completely closed is t1, the maximum moving speed of the first hopper is v1, and L1 is more than v1 t 1.

Preferably, the fixed pulley is in the second position, the top of the second hopper is at a distance L2 from the bottom of the second feeding hole, the time required for the second sensor to send a closing signal to the second valve until the second valve is completely closed is t2, the maximum moving speed of the second hopper is v2, and L2 is more than v2 t 2.

Preferably, the inner wall of the first channel is provided with a first slide rail, the first hopper is slidably mounted on the first slide rail, the inner wall of the second channel is provided with a second slide rail, and the second hopper is slidably mounted on the second slide rail.

Preferably, the device also comprises a feeding pipe and a discharging pipe,

the feeding pipe is communicated with the first feeding hole and the second feeding hole, the feeding pipe is obliquely arranged, and the height of the feeding pipe gradually rises from one end close to the first feeding hole and the second feeding hole to one end far away from the first feeding hole and the second feeding hole;

the discharging pipe is communicated with the first discharging hole and the second discharging hole, the discharging pipe is arranged in an inclined mode, and the height of the discharging pipe is gradually reduced from one end close to the first discharging hole and one end far away from the second discharging hole.

Preferably, first hopper bottom slope sets up, and first hopper bottom height reduces gradually to the one side that is close to first breach from the one side of keeping away from first breach, and second hopper bottom slope sets up, and second hopper bottom height reduces gradually to the one side that is close to the second breach from the one side of keeping away from the second breach.

Preferably, the device further comprises a first spring and a second spring;

the first spring is arranged in the first hopper, the first baffle covers the position of the first notch, the first baffle abuts against the first spring, and the first spring is in a compressed state;

the second spring is installed in the second hopper, and under the position of second breach was covered to the second baffle, the second baffle leaned on with the second spring, and the second spring is in compression state.

According to the lifting mechanism for the dryer, after the first hopper reaches the bottom of the first channel, grains enter the first hopper from the first feeding hole, then the first hopper rises to lift the grains to the top of the first channel, after the second hopper reaches the bottom of the second channel, the grains enter the second hopper from the second feeding hole, and then the second hopper rises to lift the grains to the top of the second channel. Grain freely falls into first hopper and second hopper, does not have the action of scooping grain, therefore the breakage rate of grain obtains reducing.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

Fig. 1 is a schematic view showing a lifting mechanism for a dryer in the present embodiment;

fig. 2 is a schematic view showing a lifting mechanism for a dryer in the present embodiment;

FIG. 3 shows a schematic view of a first hopper in this embodiment;

FIG. 4 shows a schematic view of a first hopper in this embodiment;

FIG. 5 is a schematic view showing a fixed sheave in the present embodiment;

FIG. 6 shows a schematic view of the first hopper at the bottom most portion of the first channel in this embodiment;

FIG. 7 shows a schematic view of the first hopper at the top most portion of the first channel in this embodiment;

FIG. 8 is a schematic view of a lifting mechanism for a dryer with a feed pipe and a discharge pipe in the present embodiment;

fig. 9 shows a schematic view of the first spring in this embodiment.

In the figure, 1-shell, 11-first channel, 12-second channel, 13-first inlet, 14-first outlet, 15-second inlet, 16-second outlet, 21-first hopper, 22-second hopper, 211-first baffle, 3-fixed pulley, 4-driving belt, 5-first cover plate, 61-feeding pipe, 62-discharging pipe, and 7-first spring.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The embodiment of the invention provides a lifting mechanism for a dryer, which is used for being arranged on a circulating dryer and lifting grains at the bottom of the dryer to the top of the dryer so as to achieve the aim of circulating drying. Referring to fig. 1 and 2, the lifting mechanism for a dryer includes a housing 1, a first hopper 21, a second hopper 22, a first shutter 211, a second shutter, a fixed pulley 3, a belt 4, and a driving member. The housing 1 in fig. 1 and 2 is shown only at the two ends of the housing, and the middle of the housing 1 is not shown.

The housing 1 in the present embodiment has a rectangular parallelepiped structure, but is not limited to the rectangular parallelepiped structure, and may have another structure, for example, a cylindrical shape. The casing 1 is installed the back and is vertically set up, be equipped with two vertical passageways along vertical direction in the casing 1, name first passageway 11 and second passageway 12 respectively, it separates to have the baffle between first passageway 11 and the second passageway 12, first passageway 11 and the parallel and level of second passageway 12 top, first passageway 11 and the parallel and level of second passageway 12 bottom, first passageway 11 and the horizontal cross-section of second passageway 12 are the rectangle in this embodiment, in other design, first passageway 11 and the cross-section of second passageway 12 are not limited to the rectangle, also can be circular, pentagon, hexagon etc..

First feed inlet 13 is equipped with on one side of first passageway 11 bottom, and

first feed inlet

13 and 11 bottom surfaces of first passageway are apart from presetting the distance, and first valve is installed in first feed inlet 13, and first valve is opened, and in grain got into first passageway 11 from first feed inlet 13, first valve was closed, and grain can't get into in the first passageway 11 from first feed inlet 13. A first discharge hole 14 is formed in one side of the top of the first channel 11, and grains in the first hopper 21 are discharged from the first discharge hole 14. The first inlet port 13 and the first outlet port 14 have a rectangular cross section.

A second feeding hole 15 is formed in one side of the bottom of the second channel 12, a preset distance is reserved between the second feeding hole 15 and the bottom surface of the second channel 12, a second valve is installed in the second feeding hole 15 and is opened, grains enter the second channel 12 from the second feeding hole 15, the second valve is closed, and the grains cannot enter the second channel 12 from the second feeding hole 15. A second discharge hole 16 is formed at one side of the top of the second channel 12, and the grains in the second hopper 22 are discharged from the second discharge hole 16. The second inlet 15 and the second inlet 15 have a rectangular cross section.

The openings of the first inlet 13, the first outlet 14, the second inlet 15 and the second outlet 16 are in the same direction, and the openings of the first inlet 13, the first outlet 14, the second inlet 15 and the second outlet 16 are perpendicular to the length direction of the first channel 11.

The first hopper 21 is slidably arranged in the first channel 11, when the first hopper 21 slides to the bottommost part of the first channel 11, the top of the first hopper 21 is lower than the bottom of the first feed opening 13, so that grains entering from the first feed opening 13 just fall into the first hopper 21; when the first hopper 21 slides to the top of the first channel 11, the first hopper 21 is located at one side of the first discharge port 14, the top of the first hopper 21 is lower than the top of the first discharge port 14, and the bottom of the first hopper 21 is lower than the bottom of the first discharge port 14.

The second hopper 22 is slidably mounted in the second channel 12, when the second hopper 22 slides to the bottommost part of the second channel 12, the top of the second hopper 22 is lower than the bottom of the second feed opening 15, so that the grains entering from the second feed opening 15 just fall into the second hopper 22; when the second hopper 22 slides to the top of the second channel 12, the second hopper 22 is located at one side of the second discharge port 16, the top of the second hopper 22 is lower than the top of the second discharge port 16, and the bottom of the second hopper 22 is lower than the bottom of the second discharge port 16.

The first hopper 21 and the second hopper 22 in this embodiment have the same structural shape, but may be designed differently. Referring to fig. 3 and 4, for the structure of the first hopper 21, the first hopper 21 includes a bottom plate, four side plates and a first baffle 211, the four side plates are fixed on the same side of the bottom plate, and the four side plates are connected in sequence, wherein the height of one side plate is lower than the height of the other three side plates, the side plate with the lower height is named as a first side plate, a gap is formed between the upper part of the first side plate and the two adjacent side plates, the gap is named as a first gap, and the first baffle 211 is rotatably connected with the top of the first side plate. The first flap 211 has a position during rotation in which it blocks the first recess, i.e. the position shown in fig. 3. First baffle 211 can rotate certain angle to first hopper 21 outside, and when first baffle 211 rotated to extreme position to first hopper 21 outside, the contained angle that first baffle 211 and first breach place plane formed was the obtuse angle, the position shown in fig. 4 promptly, and the grain in the first hopper 21 of being convenient for slides out along first baffle 211.

Second hopper 22 includes bottom plate, four curb plates and a second baffle, and four curb plates are fixed at the homonymy of bottom plate to four curb plates connect gradually, and one of them curb plate height is less than the other three curb plate height, denominates this highly low curb plate as the second curb plate, forms the breach between second curb plate upper portion and two adjacent curb plates, denominates the breach as the second breach, and the second baffle is connected with second curb plate top rotation. The second baffle rotates the in-process and has the position with the shutoff of second breach, and the second baffle can rotate certain angle to second hopper 22 outside, and when the second baffle rotated to extreme position to second hopper 22 outside, the contained angle that second baffle and second breach place plane formed was the obtuse angle, and the grain in the second hopper 22 of being convenient for comes out along the landing of second baffle.

Referring to fig. 5, the fixed block 3 is rotatably installed on the partition between the first passage 11 and the second passage 12 and is positioned on the top of the partition. The belt 4 is fitted over the fixed pulley 3, and both ends of the belt 4 are connected to the first hopper 21 and the second hopper 22. The driving piece is used for driving the fixed pulley 3 to rotate in a reciprocating mode, the transmission belt 4 moves when the fixed pulley 3 rotates, the transmission belt 4 drives the first hopper 21 and the second hopper 22 to move up and down in the first channel 11 and the second channel 12 respectively when moving, and the moving directions of the first hopper 21 and the second hopper 22 are opposite. The driving piece can be a motor, the motor is arranged on the shell 1, the output shaft of the motor is connected with the fixed pulley 3, and the motor drives the fixed pulley 3 to rotate in a reciprocating mode.

During the process that the driving piece drives the fixed pulley 3 to rotate, the moving directions of the first hopper 21 and the second hopper 22 are opposite. When the fixed pulley 3 reaches the first position, the position of the first hopper 21 is as shown in fig. 6, the first hopper 21 reaches the bottommost part of the first channel 11, at this time, the first hopper 21 is located below the first feeding hole 13, the grain entering from the first feeding hole 13 falls into the first hopper 21, meanwhile, the second hopper 22 just reaches the topmost part of the second channel 12, the second baffle plate on the second hopper 22 rotates to the outside of the second discharging hole 16 under the squeezing pressure of the grain in the second hopper 22, and the grain in the second hopper 22 is discharged through the second gap and the second discharging hole 16. When the fixed pulley 3 reaches the second position, the position of the first hopper 21 is as shown in fig. 7, the first hopper 21 reaches the topmost part of the first channel 11, the first baffle 211 on the first hopper 21 rotates to the outside of the first discharge hole 14 under the extrusion of the grains in the first hopper 21, the grains in the first hopper 21 are discharged through the first gap and the first discharge hole 14, meanwhile, the second hopper 22 reaches the bottommost part of the second channel 12, the second hopper 22 is located below the second feed opening 15, and the grains entering the second feed opening 15 fall into the second hopper 22.

In the working process, the driving part is started, the driving part drives the fixed pulley 3 to rotate in a reciprocating mode, the fixed pulley 3 reaches the first position and the second position in turn, and the first hopper 21 and the second hopper 22 reach the bottoms of the channels where the fixed pulley 3 and the second hopper are located in turn. When the first hopper 21 reaches the bottommost part of the first channel 11, the first valve is opened, the second valve is closed, grains enter the first hopper 21 through the first feeding hole 13, meanwhile, the second hopper 22 reaches the topmost part of the second channel 12, the second baffle plate on the second hopper 22 rotates to the outside of the second discharging hole 16 under the extrusion of the grains in the second hopper 22, and the grains in the second hopper 22 are discharged through the second gap and the second discharging hole 16. When the second hopper 22 reaches the bottommost part of the second channel 12, the second valve is opened, the first valve is closed, grains enter the second hopper 22 through the second feeding hole 15, meanwhile, the first hopper 21 reaches the topmost part of the first channel 11, the first baffle 211 on the first hopper 21 rotates to the outside of the first discharging hole 14 under the extrusion of the grains in the first hopper 21, and the grains in the first hopper 21 are discharged through the first notch and the first discharging hole 14. The first hopper 21 and the second hopper 22 lift grains in turn in such a circulating manner, so that the grains at the bottom of the dryer are continuously lifted to the top of the dryer.

In order to realize the automatic opening and closing of the first valve and the second valve, a first sensor and a second sensor are respectively arranged at the bottoms of the first channel 11 and the second channel 12. The first sensor is connected with the first valve and is used for controlling the first valve to be opened and closed, the first sensor is used for sensing the first hopper 21, when the first hopper 21 reaches the bottommost part of the first channel 11, the first sensor senses the first hopper 21, the first sensor sends an opening signal to the first valve at the moment, the first valve is opened after receiving the opening signal, when the first hopper 21 leaves the bottom of the first channel 11, the first sensor does not sense the first hopper 21, the first sensor sends a closing signal to the first valve at the moment, and the first valve is closed after receiving the closing signal.

The second sensor is connected with the second valve and is used for controlling the second valve to be opened and closed, the second sensor is used for sensing the second hopper 22, when the second hopper 22 reaches the bottommost part of the second channel 12, the second sensor senses the second hopper 22, the second sensor sends an opening signal to the second valve at the moment, the second valve is opened after receiving the opening signal, when the second hopper 22 leaves the bottom of the second channel 12, the second sensor cannot sense the second hopper 22, the second sensor sends a closing signal to the second valve at the moment, and the second valve is closed after receiving the closing signal.

When the first hopper 21 leaves the bottom of the first channel 11, the first sensor sends a closing signal to the first valve, the first valve starts to close and finally closes completely, and during the period from the time when the first sensor sends the closing signal to the time when the first valve closes completely, the grains still enter the first channel 11 through the first valve, if the first hopper 21 moves upwards above the first feeding hole 13 during the period, grains fall to the bottom of the first channel 11 during the period, but do not fall into the first hopper 21, and the second hopper 22 also has the problem. To solve this problem, the following solutions are proposed.

The fixed pulley 3 is in the first position, the first hopper 21 is positioned below the first feeding hole 13, the distance between the top of the first hopper 21 and the bottom of the first feeding hole 13 is L1, the time required by the first valve from the receiving of the closing signal of the first sensor to the complete closing of the first valve is t1, the maximum moving speed of the first hopper 21 is v1, and L1 is more than v1 × t 1. Then, in the time t1, the moving distance v1 × t1 of the first hopper 21 is smaller than L1, still located below the first feeding hole 13, still able to receive the grain dropped from the first feeding hole 13, thereby preventing the grain from dropping to the bottom of the first channel 11.

When the fixed pulley 3 is at the second position, the second hopper 22 is located below the second feeding hole 15, the distance between the top of the second hopper 22 and the bottom of the second feeding hole 15 is L2, the time required by the second valve from the receiving of the closing signal of the second sensor to the complete closing of the second valve is t2, the maximum moving speed of the second hopper 22 is v2, and L2 is more than v2 t 2. Then, in the time t2, the moving distance v2 t2 of the second hopper 22 is smaller than L2, still located below the second feeding hole 15, still able to receive the grain dropped from the second feeding hole 15, thereby preventing the grain from dropping to the bottom of the second channel 12.

In this embodiment, the first valve and the second valve have the same structure, and the first valve is taken as an example for description, the first valve includes a first cover plate 5 and a first hydraulic cylinder, the first hydraulic cylinder is not shown, the first cover plate 5 is slidably mounted on the outer side of the housing 1, the first hydraulic cylinder is mounted on the outer side of the housing 1, a piston rod of the first hydraulic cylinder is connected to the first cover plate 5, the first hydraulic cylinder is connected to an external first hydraulic pump, and the first hydraulic pump is connected to the first sensor. First sensor sends opening signal to first hydraulic pump, and the piston rod rebound of the first pneumatic cylinder of first hydraulic pump control, first apron 5 leave first feed inlet 13, and grain can pass through first feed inlet 13, and first sensor sends closing signal to first hydraulic pump, and the piston rod rebound of the first pneumatic cylinder of first hydraulic pump control, first apron 5 covers first feed inlet 13 gradually, and final grain can't pass through first feed inlet 13.

In order to make the first hopper 21 and the second hopper 22 slide more smoothly, a first slide rail is arranged on the inner wall of the first channel 11, the first hopper 21 is slidably mounted on the first slide rail, a second slide rail is arranged on the inner wall of the second channel 12, and the second hopper 22 is slidably mounted on the second slide rail.

Referring to fig. 8, the lifting mechanism in this embodiment further includes a feeding pipe 61 and a discharging pipe 62, the feeding pipe 61 is communicated with the first feeding hole 13 and the second feeding hole 15, the feeding pipe 61 is disposed obliquely, the height of the feeding pipe 61 gradually increases from an end close to the first feeding hole 13 and the second feeding hole 15 to an end far from the first feeding hole 13 and the second feeding hole 15, and the feeding pipe 61 is used for guiding grains to reach the first feeding hole 13 and the second feeding hole 15.

The discharging pipe 62 is communicated with the first discharging port 14 and the second discharging port 16, the discharging pipe 62 is obliquely arranged, the height of the discharging pipe 62 is gradually reduced from one end close to the first discharging port 14 and the second discharging port 16 to one end far away from the first discharging port 14 and the second discharging port 16, and the discharging pipe 62 is used for guiding grains discharged from the first discharging port 14 and the second discharging port 16 to enter the dryer.

In order to facilitate the grain discharge in the first hopper 21 and the second hopper 22, the bottom of the first hopper 21 is inclined, the bottom height of the first hopper 21 is gradually reduced from one side far away from the first notch to one side close to the first notch, the bottom of the second hopper 22 is inclined, and the bottom height of the second hopper 22 is gradually reduced from one side far away from the second notch to one side close to the second notch.

In order to make the first shutter 211 and the second shutter 211 more easily rotate when the first hopper 21 and the second hopper 22 reach the top of the casing 1, the first shutter 211 and the second shutter further include a first spring 7 and a second spring; the first spring 7 is arranged in the first hopper 21, the first baffle 211 covers the position of the first gap, the first baffle 211 abuts against the first spring 7, and the first spring 7 is in a compressed state; the second spring is installed in the second hopper 22, and under the position that the second breach was covered to the second baffle, the second baffle leaned on with the second spring, and the second spring is in compression state.

Exemplarily, taking the first hopper 21 as an example, referring to fig. 9, two side plates connected to the first side plate are provided with a step surface on the first hopper 21, the first spring 7 is fixed on the step surface, after the first baffle 211 blocks the first gap, the first baffle 211 abuts against the first spring 7, when the first hopper 21 does not reach the position of the first discharge port 14, the inner wall of the first passage 11 limits the first baffle 211 at the position abutting against the first spring 7, when the first hopper 21 reaches the position of the first discharge port 14, the first spring 7 pops the first baffle 211 open, the first baffle 211 leaves the first gap, and the grains can flow out of the first gap.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A lifting mechanism for a dryer is characterized by comprising a shell (1), a first valve, a second valve, a first hopper (21), a second hopper (22), a first baffle (211), a second baffle, a fixed pulley (3), a transmission belt (4) and a driving piece;

a first channel (11) and a second channel (12) are arranged in the shell (1), and the first channel (11) and the second channel (12) are arranged in parallel;

a first feeding hole (13) is formed in the bottom of the first channel (11), a first valve is installed in the first feeding hole (13), and a first discharging hole (14) is formed in the top of the first channel (11);

a second feed inlet (15) is formed in the bottom of the second channel (12), a second valve is installed in the second feed inlet (15), and a second discharge outlet (16) is formed in the top of the second channel (12);

the openings of the first feeding hole (13), the first discharging hole (14), the second feeding hole (15) and the second discharging hole (16) are in the same direction, and the openings of the first feeding hole (13), the first discharging hole (14), the second feeding hole (15) and the second discharging hole (16) are in the direction vertical to the length direction of the first channel (11);

the first hopper (21) is slidably mounted in the first channel (11), the first hopper (21) is provided with a first notch, the first baffle (211) is rotatably connected with the bottom of the first notch, and the first baffle (211) has a position covering the first notch in the rotating process;

the second hopper (22) is slidably arranged in the second channel (12), the second hopper (22) is provided with a second notch, the second baffle is rotatably connected with the bottom of the second notch, and the second baffle is provided with a position covering the second notch in the rotating process;

the fixed pulley (3) is rotatably arranged at the top of the shell (1) and is positioned between the first channel (11) and the second channel (12);

the transmission belt (4) is matched on the fixed pulley (3), and two ends of the transmission belt (4) are respectively connected with the first hopper (21) and the second hopper (22);

the driving piece is used for driving the fixed pulley (3) to rotate in a reciprocating mode, the fixed pulley (3) has a first position and a second position in the rotating process, and the fixed pulley (3) comprises:

the fixed pulley (3) is positioned below the first feeding hole (13), the first hopper (21) is positioned below the second feeding hole (16), the second hopper (22) is positioned at the second discharging hole (16), and the second baffle is positioned outside the second discharging hole (16);

the fixed pulley (3) is arranged at the second position, the first hopper (21) is positioned at the first discharge hole (14), the first baffle (211) is positioned outside the first discharge hole (14), and the second hopper (22) is positioned below the second feed hole (15).

2. The lifting mechanism for a dryer of claim 1 further comprising a first sensor and a second sensor;

the first sensor is arranged at the bottom of the first channel (11) and is used for controlling the opening/closing of the first valve according to the sensing of the existence of the first hopper (21);

a second sensor is installed at the bottom of the second passage (12) and is used for controlling the opening/closing of the second valve according to the sensing of the existence of the second hopper (22).

3. The lifting mechanism for dryer as claimed in claim 2,

the fixed pulley (3) is in the first position, the distance between the top of the first hopper (21) and the bottom of the first feeding hole (13) is L1, the time required by the first sensor to send a closing signal to the first valve until the first valve is completely closed is t1, the maximum moving speed of the first hopper (21) is v1, and L1 is more than v1 x t 1.

4. The lifting mechanism for dryer as claimed in claim 2,

and when the fixed pulley (3) is in the second position, the distance between the top of the second hopper (22) and the bottom of the second feeding hole (15) is L2, the time required by the second sensor to send a closing signal to the second valve until the second valve is completely closed is t2, the maximum moving speed of the second hopper (22) is v2, and L2 is more than v2 x t 2.

5. The lifting mechanism for drying machines according to any of claims 1 to 4, characterized in that the inner wall of the first channel (11) is provided with a first sliding track on which the first hopper (21) is slidably mounted, the inner wall of the second channel (12) is provided with a second sliding track on which the second hopper (22) is slidably mounted.

6. The lifting mechanism for dryer according to any one of claims 1-4, further comprising a feeding pipe (61) and a discharging pipe (62),

the feeding pipe (61) is communicated with the first feeding hole (13) and the second feeding hole (15), the feeding pipe (61) is obliquely arranged, and the height of the feeding pipe (61) is gradually increased from one end close to the first feeding hole (13) and the second feeding hole (15) to one end far away from the first feeding hole (13) and the second feeding hole (15);

discharging pipe (62) and first discharge gate (14) and second discharge gate (16) intercommunication, discharging pipe (62) slope setting, and discharging pipe (62) height reduces gradually to the one end of keeping away from first discharge gate (14) and second discharge gate (16) from the one end that is close to first discharge gate (14) and second discharge gate (16).

7. The lifting mechanism for dryer according to any one of claims 1-4, characterized in that the bottom of the first hopper (21) is arranged obliquely, the bottom height of the first hopper (21) is gradually reduced from the side far away from the first gap to the side near the first gap, the bottom of the second hopper (22) is arranged obliquely, and the bottom height of the second hopper (22) is gradually reduced from the side far away from the second gap to the side near the second gap.

8. The lifting mechanism for dryer according to any of claims 1-4, further comprising a first spring (7) and a second spring;

the first spring (7) is arranged in the first hopper (21), the first baffle (211) covers the position of the first gap, the first baffle (211) is abutted against the first spring (7), and the first spring (7) is in a compressed state;

the second spring is installed in the second hopper (22), and under the position that the second breach was covered to the second baffle, the second baffle leaned on with the second spring, and the second spring is in compression state.