Solid material continuous conveying and grading device

Abstract

The invention relates to the technical field of solid material grading devices, and discloses a solid material continuous conveying and grading device which comprises a rack, a first screen, a second screen, a connecting shaft and a conveying mechanism, meshes of the first screen are smaller than those of the second screen, the first screen is obliquely arranged, the lower end of the first screen is an inclined edge, and the lower end of the second screen is an inclined edge. The connecting shaft is obliquely installed on the machine frame, the inclination degree of the connecting shaft is consistent with the inclination degree of the inclined edge, the inclined edge is fixedly connected with the connecting shaft, the second screen is obliquely arranged in the inclined extending direction of the connecting shaft, and the second screen is in horizontal sliding fit with the machine frame. The second screen is elastically connected with the connecting shaft, and a cam driving mechanism is arranged on the machine frame. According to the continuous conveying and grading device for the solid materials, the problem that loss is high in the screening process of fine materials through an existing screening machine is solved.

Description

Technical Field

[0001] The invention relates to the technical field of solid material classification devices, and in particular to a solid material continuous conveying and classification device. Background Art

[0002] During the transportation of solid granular materials, the materials are usually mixed together for transportation. Therefore, the granular materials need to be screened and the particles of different particle sizes need to be screened and graded. At present, the aperture of the traditional upper and lower interval layered screening machine decreases from top to bottom. The coarse material is screened out first, and the fine material needs to pass through multiple layers of screens before being screened out. The fine material will also produce a certain loss during the screening process. When the quality of fine material is better than that of coarse material, the long-term use of traditional screening machines will inevitably produce more fine material loss. Therefore, there is an urgent need for a grading device that can first screen out the fine material, thereby reducing the loss of fine material. Summary of the invention

[0003] The object of the present invention is to provide a solid material continuous conveying and grading device to solve at least one of the above problems existing in the prior art.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A solid material continuous conveying and grading device comprises a frame, a first screen, a second screen, a connecting shaft and a conveying mechanism, wherein the mesh openings of the first screen are smaller than the mesh openings of the second screen, the first screen is tilted, the lower end of the first screen is a tilted edge, the connecting shaft is tiltedly mounted on the frame, the inclination of the connecting shaft is consistent with the inclination of the tilted edge, the tilted edge is fixedly connected to the connecting shaft, the second screen is tilted along the tilted extension direction of the connecting shaft, the second screen is horizontally slidably matched with the frame, the second screen is elastically connected to the connecting shaft, a cam driving mechanism is provided on the frame, the cam driving mechanism drives the second screen away from one end of the connecting shaft, and an inclined baffle is provided at one end of the second screen away from the connecting shaft;

[0006] The conveying mechanism includes a first conveyor belt and a second conveyor belt, the first conveyor belt is located below the first screen, the second conveyor belt is located below the second screen, a collecting trough is provided below the discharge end of the first conveyor belt and the second conveyor belt, and an inclined guide plate is provided below the discharge end of the second screen.

[0007] In the technical solution, since the first screen is tilted, the mesh of the first screen is smaller than the mesh of the second screen. When the material is put from the upper end of the first screen onto the first screen, under the action of gravity, the material slides down along the first screen, and the finest material leaks out and falls into the first conveyor belt below the first screen during the sliding process on the first screen, and is output to the corresponding aggregate trough by the first conveyor belt. Since the lower end of the first screen is an inclined edge, the connecting shaft is tiltedly installed on the frame, the inclination of the connecting shaft is consistent with the inclination of the inclined edge, the inclined edge is fixedly connected to the connecting shaft, the second screen is tilted along the inclined extension direction of the connecting shaft, the second screen and the frame are horizontally slidably matched, the second screen and the connecting shaft are elastically connected, the connecting shaft realizes the fixed installation of the lower end inclined edge of the first screen, and the connecting shaft cooperates with the frame to realize the tilted setting of the second screen, so that the coarse material located on the second screen during the screening process can be output to the inclined guide plate along the inclination of the second screen, and output by the inclined guide plate. Due to the horizontal sliding fit between the second screen and the frame, the second screen is elastically connected to the connecting shaft, and a cam driving mechanism is provided on the frame. The cam driving mechanism drives the second screen away from the end of the connecting shaft, and the rotation of the cam can drive the second screen plate to shake, so as to realize the screening of the material on the second screen. The end of the second screen away from the connecting shaft is provided with an inclined baffle, which can shield the material during the material screening process. The material output above the second screen is the coarsest material, and the smaller material falls from the mesh of the second screen to the second conveyor belt below the second screen, and is output by the second conveyor belt to the corresponding aggregate trough. In this technical solution, the inclination direction of the second screen is different from the inclination direction of the first screen, and the amount of material passing through the first screen is more. Therefore, the width direction of the first screen is the length direction of the second screen, which is also the inclination direction of the second screen, which can reduce the length of the equipment and ensure the adequacy of material screening; the inclination of the second screen is small, and the cam driving mechanism is used to enable the material to be output from the second screen, and the screening of the material can be better realized, and the overall height of the equipment can be reduced. In summary, the technical solution has a reasonable structural design and can meet the requirement of screening out the finest materials first, thus solving the problem of high loss caused by the existing screening machines in the process of screening fine materials.

[0008] Furthermore, in order to guide the fine materials falling onto the first conveyor belt, a guide plate is provided on the connecting shaft along its length direction, and the guide plate is inclined toward the first conveyor belt.

[0009] Furthermore, in order to vibrate and screen the second screen, the cam drive mechanism includes a first motor, a rotating shaft and a cam. The first motor is installed on a frame, and the output shaft of the first motor is transmission-connected to the rotating shaft. The inclination of the rotating shaft is consistent with the inclination of the second screen. The rotating shaft is rotatably connected to the frame, and the cam is fixed on the rotating shaft, and the cam abuts against one end of the second screen away from the connecting shaft.

[0010] Furthermore, in order to enable the second screen to vibrate, a first mounting groove is provided on the connecting shaft along its length direction, a plurality of elastic members are provided at equal intervals between the first mounting groove and one end of the second screen, a T-shaped seat is provided at the other end of the second screen, the front and rear ends of the T-shaped seat are respectively slidably matched with the frame at different height levels, and the cam abuts against the vertical plate of the T-shaped seat.

[0011] Furthermore, in order to be able to synchronously control the first conveyor belt and the second conveyor belt, it also includes a second motor and a driving wheel, the second motor is installed on the frame, the output shaft of the second motor is fixedly connected to the driving wheel, and the driving wheel, the right driving wheel of the first conveyor belt and the left driving wheel of the second conveyor belt are connected by a transmission belt.

[0012] Furthermore, in order to avoid dust during the screening process of materials, the frame includes an outer shell and a support frame, the support frame includes symmetrically arranged cross bars and multiple columns arranged at the lower end of the cross bars, the cross bars are fixedly connected to the outer shell, and a discharge opening is provided on the outer shell at a position opposite to the discharge end of the second screen.

[0013] Furthermore, in order to facilitate the installation of the rotating shafts on the first conveyor belt and the second conveyor belt, three columns are provided at the lower end of the cross bar, the left column is rotatably connected to the left transmission shaft of the first conveyor belt, a connecting frame is provided between the middle column and the right column, the right transmission shaft of the first conveyor belt and the left transmission shaft of the second conveyor belt are both rotatably connected to the connecting frame, and the right column is rotatably connected to the right transmission shaft of the second conveyor belt.

[0014] Furthermore, in order to better realize the installation of the first screen, a connecting platform is provided at the upper end of the outer shell, a strip groove is provided on the connecting platform, a vertical plug-in edge is provided at the upper end of the first screen, the vertical plug-in edge is snap-fitted with the strip groove, a second installation groove is provided on the connecting shaft, and the inclined edge is snap-fitted in the second installation groove.

[0015] Furthermore, in order to facilitate the assembly of the first screen and the second screen, the first screen and the second screen both include a plate frame and an intermediate net, the intermediate net is fixed in the middle of the plate frame, the plate frame of the first screen is snap-fitted with the second mounting groove, the plate frame of the second screen is slidingly fitted with the first mounting groove, and the elastic member is a spring.

[0016] Furthermore, in order to ensure that materials are transported on the first conveyor belt and the second conveyor belt, enclosure plates are provided on both sides of the first conveyor belt and the second conveyor belt.

[0017] The beneficial effects of the present invention are as follows: in the technical solution, since the first screen is inclined, the mesh of the first screen is smaller than the mesh of the second screen, and in the process of the material being put from the upper end of the first screen onto the first screen, under the action of gravity, the material slides down along the first screen, and the finest material leaks out and falls into the first conveyor belt below the first screen during the process of sliding down the first screen, and is output to the corresponding aggregate trough by the first conveyor belt. Since the lower end of the first screen is an inclined edge, the connecting shaft is obliquely installed on the frame, the inclination of the connecting shaft is consistent with the inclination of the inclined edge, the inclined edge is fixedly connected to the connecting shaft, the second screen is inclined along the inclined extension direction of the connecting shaft, the second screen is horizontally slidably matched with the frame, the second screen is elastically connected with the connecting shaft, the connecting shaft realizes the fixed installation of the inclined edge at the lower end of the first screen, and the connecting shaft cooperates with the frame to realize the inclined setting of the second screen, so that the coarse material located on the second screen during the screening process can be output to the inclined guide plate along the inclination of the second screen, and output by the inclined guide plate. Due to the horizontal sliding fit between the second screen and the frame, the second screen is elastically connected to the connecting shaft, and a cam driving mechanism is provided on the frame. The cam driving mechanism drives the second screen away from the end of the connecting shaft, and the rotation of the cam can drive the second screen plate to shake, so as to realize the screening of the material on the second screen. The end of the second screen away from the connecting shaft is provided with an inclined baffle, which can shield the material during the material screening process. The material output above the second screen is the coarsest material, and the smaller material falls from the mesh of the second screen to the second conveyor belt below the second screen, and is output by the second conveyor belt to the corresponding aggregate trough. In this technical solution, the inclination direction of the second screen is different from the inclination direction of the first screen, and the amount of material passing through the first screen is more. Therefore, the width direction of the first screen is the length direction of the second screen, which is also the inclination direction of the second screen, which can reduce the length of the equipment and ensure the adequacy of material screening; the inclination of the second screen is small, and the cam driving mechanism is used to enable the material to be output from the second screen, and the screening of the material can be better realized, and the overall height of the equipment can be reduced. In summary, the technical solution has a reasonable structural design and can meet the requirement of screening out the finest materials first, thus solving the problem of high loss caused by the existing screening machines in the process of screening fine materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the first viewing angle of the partial cross-section state of the present invention;

[0019] Figure 2It is a structural schematic diagram of the second viewing angle of the partial cross-section state of the present invention;

[0020] Figure 3 It is a schematic diagram of the internal structure of the present invention;

[0021] Figure 4 for Figure 3 A schematic diagram of the local enlarged structure at point A in the middle;

[0022] Figure 5 for Figure 3 A schematic diagram of the local enlarged structure at B in the middle;

[0023] Figure 6 It is a structural schematic diagram of another viewing angle inside the present invention;

[0024] Figure 7 It is a structural schematic diagram of another perspective of the present invention;

[0025] Figure 8 It is a structural schematic diagram of the screening state of the present invention.

[0026] In the figure: frame 1; first screen 2; second screen 3; connecting shaft 4; inclined edge 5; cam drive mechanism 6; inclined baffle 7; first conveyor belt 8; second conveyor belt 9; collecting trough 10; inclined guide plate 11; guide plate 12; first motor 13; rotating shaft 14; cam 15; first mounting groove 16; elastic member 18; T-shaped seat 19; second motor 20; driving wheel 21; right driving wheel 22; left driving wheel 23; transmission belt 24; housing 25; cross bar 27; column 28; discharge opening 29; left transmission shaft; connecting frame 31; right transmission shaft; connecting platform 33; strip groove 34; vertical plug-in edge 35; second mounting groove 36; plate frame 37; enclosure 38. DETAILED DESCRIPTION

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be briefly introduced below in combination with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention.

[0028] Embodiment 1:

[0029] like Figure 1-Figure 8As shown, the present embodiment provides a solid material continuous conveying and grading device, comprising a frame 1, a first screen 2, a second screen 3, a connecting shaft 4 and a conveying mechanism, the mesh of the first screen 2 is smaller than the mesh of the second screen 3, the first screen 2 is tilted, the lower end of the first screen 2 is an inclined edge 5, the connecting shaft 4 is tiltedly installed on the frame 1, the inclination of the connecting shaft 4 is consistent with the inclination of the inclined edge 5, the inclined edge 5 is fixedly connected to the connecting shaft 4, the second screen 3 is tilted along the inclined extension direction of the connecting shaft 4, the second screen 3 and the frame 1 are horizontally slidably matched, the second screen 3 and the connecting shaft 4 are elastically connected, a cam driving mechanism 6 is provided on the frame 1, the cam driving mechanism 6 drives the second screen 3 away from the end of the connecting shaft 4, and an inclined baffle 7 is provided at the end of the second screen 3 away from the connecting shaft 4;

[0030] The conveying mechanism includes a first conveyor belt 8 and a second conveyor belt 9. The first conveyor belt 8 is located below the first screen 2, and the second conveyor belt 9 is located below the second screen 3. A collection trough 10 is provided below the discharge end of the first conveyor belt 8 and the second conveyor belt 9, and an inclined guide plate 11 is provided below the discharge end of the second screen 3.

[0031] In the present technical solution, since the first screen 2 is arranged at an angle, the mesh holes of the first screen 2 are smaller than the mesh holes of the second screen 3. When the material is dropped from the upper end of the first screen 2 onto the first screen 2, the material slides down along the first screen 2 under the action of gravity. The finest material will leak out and fall onto the first conveyor belt 8 under the first screen 2 during the process of the first screen 2 sliding up and down, and will be output by the first conveyor belt 8 to the corresponding aggregate trough 10. Since the lower end of the first screen 2 is an inclined edge 5, the connecting shaft 4 is obliquely installed on the frame 1, the inclination of the connecting shaft 4 is consistent with the inclination of the inclined edge 5, the inclined edge 5 is fixedly connected to the connecting shaft 4, the second screen 3 is inclined along the inclined extension direction of the connecting shaft 4, the second screen 3 and the frame 1 are horizontally slidably matched, the second screen 3 and the connecting shaft 4 are elastically connected, the connecting shaft 4 realizes the fixed installation of the inclined edge 5 at the lower end of the first screen 2, and the connecting shaft 4 cooperates with the frame 1 to realize the inclined setting of the second screen 3, so that the coarse material located on the second screen 3 during the screening process can be output to the inclined guide plate 11 along the inclination of the second screen 3 and output by the inclined guide plate 11. Due to the horizontal sliding fit between the second screen 3 and the frame 1, the second screen 3 is elastically connected to the connecting shaft 4, and a cam driving mechanism 6 is provided on the frame 1. The cam driving mechanism 6 drives the second screen 3 away from one end of the connecting shaft 4. The rotation of the cam 15 can drive the second mesh plate to shake, thereby realizing the screening of the material on the second screen 3. An inclined baffle 7 is provided at the end of the second screen 3 away from the connecting shaft 4, which can shield the material during the material screening process. The material output above the second screen 3 is the coarsest material, and the smaller material falls from the mesh holes of the second screen 3 to the second conveyor belt 9 below the second screen 3, and is output by the second conveyor belt 9 to the corresponding aggregate trough 10. In the present technical solution, the inclination direction of the second screen 3 is different from that of the first screen 2, and the amount of material passing through the first screen 2 is greater. Therefore, the width direction of the first screen 2 is the length direction of the second screen 3, which is also the inclination direction of the second screen 3, which can reduce the length of the equipment and ensure the adequacy of material screening; the inclination of the second screen 3 is smaller, and the cam drive mechanism 6 is used to enable the material to be output from the second screen 3, and the screening of the material can be better achieved, and at the same time, the overall height of the equipment can be reduced. In summary, the present technical solution has a reasonable structural design, which can meet the requirement of screening out the finest materials first, and solves the problem of high loss caused by the existing screening machine in the screening process of fine materials.

[0032] Embodiment 2:

[0033] This embodiment is optimized based on the above-mentioned embodiment 1.

[0034] In order to guide the fine materials to fall onto the first conveyor belt 8 , a guide plate 12 is provided on the connecting shaft 4 along its length direction, and the guide plate 12 is inclined toward the first conveyor belt 8 .

[0035] Embodiment 3:

[0036] This embodiment is optimized based on the above-mentioned embodiment 1.

[0037] In order to vibrate and screen the second sieve 3, the cam drive mechanism 6 includes a first motor 13, a rotating shaft 14 and a cam 15. The first motor 13 is installed on the frame 1, and the output shaft of the first motor 13 is transmission-connected with the rotating shaft 14. The inclination of the rotating shaft 14 is consistent with the inclination of the second sieve 3. The rotating shaft 14 is rotationally connected to the frame 1, and the cam 15 is fixed on the rotating shaft 14. The cam 15 abuts against the end of the second sieve 3 away from the connecting shaft 4.

[0038] Embodiment 4:

[0039] This embodiment is optimized based on the above-mentioned embodiment 3.

[0040] In order to enable the second screen 3 to vibrate, a first mounting groove 16 is provided on the connecting shaft 4 along its length direction, a plurality of elastic members 18 are provided at equal intervals between the first mounting groove 16 and one end of the second screen 3, a T-shaped seat 19 is provided at the other end of the second screen 3, and the front and rear ends of the T-shaped seat 19 are respectively slidably matched with the frame 1 at different heights, and the cam 15 is in contact with the vertical plate of the T-shaped seat 19.

[0041] Embodiment 5:

[0042] This embodiment is optimized based on the above-mentioned embodiment 1.

[0043] In order to be able to synchronously control the first conveyor belt 8 and the second conveyor belt 9, a second motor 20 and a driving wheel 21 are also included. The second motor 20 is installed on the frame 1, and the output shaft of the second motor 20 is fixedly connected to the driving wheel 21. The driving wheel 21, the right driving wheel 22 of the first conveyor belt 8 and the left driving wheel 23 of the second conveyor belt 9 are connected through a transmission belt 24.

[0044] Embodiment 6:

[0045] This embodiment is optimized based on the above-mentioned embodiment 4.

[0046] In order to avoid dust during the screening process, the frame 1 includes an outer shell 25 and a support frame. The support frame includes a symmetrically arranged cross bar 27 and a plurality of columns 28 arranged at the lower end of the cross bar 27. The cross bar 27 is fixedly connected to the outer shell 25. A discharge opening 29 is provided on the outer shell 25 at a position facing the discharge end of the second screen 3.

[0047] Embodiment 7:

[0048] This embodiment is optimized based on the above-mentioned embodiment 6.

[0049] In order to facilitate the installation of the rotating shafts on the first conveyor belt 8 and the second conveyor belt 9, three columns 28 are provided at the lower end of the cross bar 27. The left column 28 is rotatably connected to the left transmission shaft of the first conveyor belt 8. A connecting frame 31 is provided between the middle column 28 and the right column 28. The right transmission shaft of the first conveyor belt 8 and the left transmission shaft of the second conveyor belt 9 are both rotatably connected to the connecting frame 31, and the right column 28 is rotatably connected to the right transmission shaft of the second conveyor belt 9.

[0050] Embodiment 8:

[0051] This embodiment is optimized based on the above-mentioned embodiment 6.

[0052] In order to better realize the installation of the first screen 2, a connecting platform 33 is provided at the upper end of the outer shell 25, and a strip groove 34 is provided on the connecting platform 33. A vertical plug-in edge 35 is provided at the upper end of the first screen 2, and the vertical plug-in edge 35 is snap-fitted with the strip groove 34. A second installation groove 36 is provided on the connecting shaft 4, and the inclined edge 5 is snap-fitted into the second installation groove 36.

[0053] Embodiment 9:

[0054] This embodiment is optimized based on the above-mentioned embodiment 8.

[0055] In order to facilitate the assembly of the first screen 2 and the second screen 3, the first screen 2 and the second screen 3 both include a plate frame 37 and an intermediate net, the intermediate net is fixed in the middle of the plate frame 37, the plate frame 37 of the first screen 2 is snap-fitted with the second mounting groove 36, the plate frame 37 of the second screen 3 is slidingly fitted with the first mounting groove 16, and the elastic member 18 is a spring.

[0056] Embodiment 10:

[0057] This embodiment is optimized based on the above-mentioned embodiment 1.

[0058] In order to ensure that the materials are transported on the first conveyor belt 8 and the second conveyor belt 9 , enclosure plates 38 are provided on both sides of the first conveyor belt 8 and the second conveyor belt 9 .

[0059] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A solid material continuous conveying and grading device, characterized in that: The invention comprises a frame, a first screen, a second screen, a connecting shaft and a conveying mechanism, wherein the mesh of the first screen is smaller than the mesh of the second screen, the first screen is arranged obliquely, the lower end of the first screen is an inclined edge, the connecting shaft is obliquely installed on the frame, the inclination of the connecting shaft is consistent with the inclination of the inclined edge, the inclined edge is fixedly connected to the connecting shaft, the second screen is arranged obliquely along the oblique extension direction of the connecting shaft, the second screen is horizontally slidably matched with the frame, the second screen is elastically connected with the connecting shaft, a cam driving mechanism is arranged on the frame, the cam driving mechanism drives the second screen away from one end of the connecting shaft, and an inclined baffle is arranged at one end of the second screen away from the connecting shaft; The conveying mechanism includes a first conveyor belt and a second conveyor belt, the first conveyor belt is located below the first screen, the second conveyor belt is located below the second screen, a collecting trough is provided below the discharge end of the first conveyor belt and the second conveyor belt, and an inclined guide plate is provided below the discharge end of the second screen.

2. A solid material continuous conveying and grading device according to claim 1, characterized in that: A guide plate is provided on the connecting shaft along its length direction, and the guide plate is inclined toward the first conveyor belt.

3. A solid material continuous conveying and grading device according to claim 1, characterized in that: The cam driving mechanism includes a first motor, a rotating shaft and a cam. The first motor is installed on a frame. The output shaft of the first motor is drivingly connected to the rotating shaft. The inclination of the rotating shaft is consistent with the inclination of the second screen. The rotating shaft is rotatably connected to the frame. The cam is fixed on the rotating shaft. The cam abuts against one end of the second screen away from the connecting shaft.

4. A solid material continuous conveying and grading device according to claim 3, characterized in that: The connecting shaft is provided with a first mounting groove along its length direction, a plurality of elastic members are provided at equal intervals between the first mounting groove and one end of the second screen, a T-shaped seat is provided at the other end of the second screen, the front and rear ends of the T-shaped seat are respectively slidably matched with the frame at different height levels, and the cam is in contact with the vertical plate of the T-shaped seat.

5. The solid material continuous conveying and grading device according to claim 1, characterized in that: It also includes a second motor and a driving wheel, wherein the second motor is mounted on a frame, an output shaft of the second motor is fixedly connected to the driving wheel, and the driving wheel, the right driving wheel of the first conveyor belt and the left driving wheel of the second conveyor belt are connected through a transmission belt.

6. A solid material continuous conveying and grading device according to claim 4, characterized in that: The frame includes a shell and a support frame, the support frame includes symmetrically arranged cross bars and multiple columns arranged at the lower end of the cross bars, the cross bars are fixedly connected to the shell, and a discharge opening is provided on the shell at a position facing the discharge end of the second screen.

7. A solid material continuous conveying and grading device according to claim 6, characterized in that: Three columns are provided at the lower end of the cross bar, the left column is rotatably connected to the left transmission shaft of the first conveyor belt, a connecting frame is provided between the middle column and the right column, the right transmission shaft of the first conveyor belt and the left transmission shaft of the second conveyor belt are both rotatably connected to the connecting frame, and the right column is rotatably connected to the right transmission shaft of the second conveyor belt.

8. The solid material continuous conveying and grading device according to claim 6, characterized in that: A connecting platform is provided at the upper end of the shell, a strip groove is provided on the connecting platform, a vertical plug-in edge is provided at the upper end of the first screen, the vertical plug-in edge is snap-fitted with the strip groove, a second mounting groove is provided on the connecting shaft, and the inclined edge is snap-fitted into the second mounting groove.

9. A solid material continuous conveying and grading device according to claim 8, characterized in that: The first screen and the second screen both include a plate frame and an intermediate net, the intermediate net is fixed in the middle of the plate frame, the plate frame of the first screen is snap-fitted with the second mounting groove, the plate frame of the second screen is slidingly fitted with the first mounting groove, and the elastic member is a spring.

10. The solid material continuous conveying and grading device according to claim 1, characterized in that: Both sides of the first conveyor belt and the second conveyor belt are provided with enclosure plates.

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