A continuous belt drying equipment

Abstract

The present invention discloses a continuous belt drying device, comprising: a housing, a heating device arranged at the bottom of the housing, a screening assembly arranged at the discharging end of the top-layer conveying member, a conveying assembly arranged inside the housing, and a first conveying pipe and a second conveying pipe arranged below the screening assembly. The conveying assembly includes four conveying members arranged at longitudinal intervals. Among the four conveying members, the conveying member at the top layer is the top-layer conveying member, the conveying member at the second layer is the second-layer conveying member, the conveying member at the third layer is the third-layer conveying member, and the conveying part at the bottom layer is the bottom-layer conveying member. The conveying members are divided into a feeding end and a discharging end. Among two adjacent conveying members, the discharging end of one conveying member is correspondingly arranged with the feeding end of the other conveying member. By arranging a screening assembly at the discharging end of the top-layer conveying member, the materials are divided into multiple levels and respectively conveyed to the corresponding layers to avoid over-drying.

Description

Technical Field

[0001] The present invention relates to the technical field of drying equipment, and specifically, to a continuous belt drying equipment. Background Art

[0002] Currently, in current industrial production, multi-layer belt drying equipment is widely used in the drying process of various granular materials. This equipment conveys materials from one end to the other through continuous belt transmission, and at the same time uses hot air or other heat sources to dry the materials. The multi-layer design further improves the drying efficiency of the equipment, enabling it to process more materials in a limited space.

[0003] After retrieval, it is found that a Chinese patent with the publication number CN213599768U discloses a belt drying equipment. This patent includes a drying box, a heating component, and multiple layers of conveyor belts. The equipment is designed with feeding, pushing, drying, turning, and discharging processes. Materials enter the drying box through the conveyor belt, are flattened by the pushing plate, and are turned and dried during transmission. The dust and moisture generated during the drying process are respectively processed by the dust filter plate and the dehumidification component to ensure the drying quality of the materials. However, although this patent also adopts the design of multiple conveyor belts, when processing the same batch of granular materials, it still faces a significant problem: the inconsistency of material sizes. In the same batch of materials, due to the influence of various factors (such as raw material sources, processing processes, etc.), there are often large differences in the sizes of material particles. Although materials are often classified by pre-screening means such as vibrating screens and drum screens before entering the drying equipment, due to the limitations of screening accuracy, particle adhesion, or secondary mixing during transportation, it is still difficult to completely avoid the problem of mixing of large and small particles. Moreover, after preliminary drying in the drying equipment, the shrinkage degrees of the originally same-sized materials will also be different. For smaller material particles, they are more easily directly affected by the hot air during the drying process. This causes the small particle materials to absorb more heat than the large particle materials within the same drying time, and thus are more likely to reach or exceed their ideal drying degree, resulting in over-drying. Over-drying not only reduces the quality of the materials, but may also have an adverse impact on their subsequent processing and use. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the defects in the prior art and provide a continuous belt drying equipment, which divides the materials into multiple levels by setting a screening component at the discharge end of the top conveying component and conveys them to the corresponding layers respectively to avoid over-drying.

[0005] To solve the above technical problem, the technical solution of the present invention is: a continuous belt drying equipment, including:

[0006] A housing, on which a discharge port and a feed port are respectively provided;

[0007] A heating device disposed at the bottom of the housing, the heating device being adapted to introduce hot air into the housing from bottom to top;

[0008] A conveying assembly disposed in the housing, the conveying assembly including four conveying members arranged at longitudinal intervals. Among the four conveying members, the conveying member at the top layer is the top-layer conveying member, the conveying member at the second layer is the second-layer conveying member, the conveying member at the third layer is the third-layer conveying member, and the conveying part at the bottom layer is the bottom-layer conveying member. The conveying members are divided into a feeding end and a discharging end. Among two adjacent conveying members, the discharging end of one conveying member and the feeding end of the other conveying member are correspondingly arranged. The feeding end of the top-layer conveying member corresponds to the feeding port, and the discharging end of the bottom-layer conveying member corresponds to the discharging port;

[0009] A screening assembly disposed at the discharging end of the top-layer conveying member, the screening assembly being adapted to screen the material passing through the top-layer conveying member;

[0010] A first conveying pipe and a second conveying pipe disposed below the screening assembly. The first conveying pipe is adapted to convey part of the screened material to the feeding end of the third-layer conveying member, and the second conveying pipe is adapted to convey part of the screened material to the feeding end of the bottom-layer conveying member.

[0011] Further, the screening assembly includes a fixed guide plate, a connecting plate and a fixed bracket connected to the housing. Two ends of the connecting plate are respectively connected to the bottom of the fixed guide plate and the top of the fixed bracket;

[0012] A first screen is disposed in the fixed guide plate, a second screen is disposed in the fixed bracket. A first material receiving tray and a second material receiving tray are disposed at the bottom of the fixed bracket. The second material receiving tray is directly below the initial position of the second screen. A vibration mechanism is disposed between the second material receiving tray and the second screen, and the vibration mechanism is adapted to vibrate the second screen at the initial position. A linear movement mechanism is disposed in the fixed bracket, and the linear movement mechanism is connected to the second screen to drive the second screen to move towards the first material receiving tray;

[0013] The first conveying pipe is connected to the bottom of the first material receiving tray, and the second conveying pipe is connected to the bottom of the second material receiving tray;

[0014] The conveying member includes two driving rollers, a metal mesh belt and a driving motor;

[0015] Both of the two transmission rollers are rotatably installed in the housing. Transmission mechanisms are provided on both of the two transmission rollers. The transmission mechanisms are connected to the metal mesh belt. The drive motor is installed on the housing. The drive motor is connected to one of the transmission rollers so as to drive the two transmission rollers to rotate, thereby driving the metal mesh belt to rotate.

[0016] Furthermore, two limiting plates are provided in the fixed guide plate. One end of the first screen away from the top layer conveying component is horizontally inclined downward. A receiving plate is provided at the feeding end of the second layer conveying component. The receiving plate is connected to the housing. The receiving plate is adapted to block the materials that fail to pass through the mesh holes of the first screen, so that the materials fall on the corresponding conveying components.

[0017] Furthermore, the linear movement mechanism includes a slide rail, a slider, a moving plate and a fixed frame;

[0018] The slide rail is connected in the fixed bracket. The slider is slidably arranged in the slide rail. A first spring is arranged in the slide rail. Two ends of the first spring are respectively connected to the slide rail and the slider. The slider is connected to the moving plate. A rotating shaft is arranged between the moving plate and the fixed frame. One end of the fixed frame is connected to the moving plate through the rotating shaft. The second screen is arranged in the fixed frame;

[0019] A second spring is arranged in the slider. The bottom of the second spring is connected to the inner wall of the slider. The top of the second spring is connected with a mating block. A sliding groove is formed on the fixed bracket. The mating block is located in the sliding groove. A plurality of push blocks arranged at intervals are connected to the surface of the metal mesh belt corresponding to the top layer conveying component. The push blocks are adapted to contact the mating block under the drive of the metal mesh belt. The surfaces of the push blocks and the mating blocks in contact are both arranged in an inclined shape. The push blocks are adapted to push the mating block to move after contacting the mating block;

[0020] Two symmetrically arranged fixed blocks are provided at the bottom of the fixed bracket. The fixed blocks are adapted to support the other end of the fixed frame.

[0021] Furthermore, a plurality of third springs are arranged in the fixed frame. The second screen is connected to the plurality of third springs;

[0022] The vibration mechanism includes a linkage rod and a plurality of first cams fixedly sleeved outside the linkage rod. The linkage rod is rotatably installed inside the housing. A synchronous belt is jointly sleeved between the linkage rod and the transmission roller close to itself in the top layer conveying component through a synchronous pulley. The transmission roller is adapted to drive the linkage rod to rotate, thereby driving the first cams to impact the bottom of the second screen;

[0023] A fixing rod is commonly connected between the two fixing blocks. An fixing plate is fixedly sleeved outside the fixing rod. A material blocking plate is movably sleeved outside the fixing rod. A fourth spring is commonly connected between the material blocking plate and the fixing plate, and the fourth spring is sleeved outside the fixing rod.

[0024] Furthermore, a partition plate is arranged on the fixed guide plate, and a longitudinal movement mechanism is arranged in the connecting plate. The longitudinal movement mechanism is connected to the partition plate and is adapted to drive the partition plate to move longitudinally.

[0025] The longitudinal movement mechanism includes a transmission sleeve, a threaded rod, a gear and a rack. The transmission sleeve is connected to the bottom of the partition plate. The transmission sleeve passes through the fixed guide plate into the connecting plate. The threaded rod is rotatably installed in the connecting plate. The transmission sleeve is assembled outside the threaded rod. The gear is fixedly sleeved outside the threaded rod. The rack is connected to one side of the moving plate. The rack is adapted to move along with the moving plate, thereby driving the gear and the threaded rod to rotate, and then driving the transmission sleeve and the partition plate to move longitudinally.

[0026] Furthermore, a cloth feeding assembly is arranged at the feeding end of the conveying component. The cloth feeding assembly includes a mounting plate and a cloth roller. The mounting plate is connected to the housing, and the cloth roller is connected to the mounting plate.

[0027] An adjusting plate is arranged on the surface of the cloth roller facing the feeding end of the corresponding conveying component. An inclined guiding surface is arranged at the bottom of the adjusting plate. Diversion inclined surfaces are arranged on both sides of the adjusting plate. The diversion inclined surfaces are adapted to divert the material to both sides, and the inclined guiding surface is adapted to guide the material below the cloth roller.

[0028] Furthermore, a partition plate is arranged on the surface of the cloth roller opposite to the adjusting plate. A plurality of partition blocks are arranged at intervals on the partition plate. A material guiding inclined surface is arranged on one side of the partition block close to the adjusting plate. The partition block is adapted to make the material arranged at intervals in a strip shape after passing through.

[0029] A plurality of dispersion mechanisms are arranged at intervals between two corresponding driving rollers in the conveying component. The dispersion mechanisms are located between the partition plate and the discharging end of the corresponding conveying component.

[0030] The dispersion mechanism includes a support rod, an outer sleeve, and a fifth spring. The support rod is fixedly connected inside the housing. The outer sleeve is movably sleeved outside the support rod. A plurality of second cams arranged at intervals are fixedly sleeved outside the outer sleeve. The fifth spring is sleeved outside the support rod, and both ends of the fifth spring are respectively connected to the housing and the outer sleeve. The position where the second cam contacts the bottom of the metal mesh belt is the abutting part. When the metal mesh belt moves, the meshes of the metal mesh belt contact the abutting part, causing the second cam to deflect at an angle.

[0031] Further, the air outlet of the heating device extends into the housing from the bottom of the housing. A flow dividing plate is arranged inside the housing. The flow dividing plate divides the air flow in the air outlet. Part of the air flow blows to the bottom of the bottom layer conveying component, and the other part of the air flow blows to both sides of the bottom layer conveying component and flows upward;

[0032] An air distribution pipe corresponding to the fabric roller is arranged on the housing. The air distribution pipe is adapted to introduce the part of the air flow blowing to both sides into the corresponding fabric roller. The fabric roller is provided with a first air outlet hole and a second air outlet hole. The first air outlet hole penetrates through the adjusting plate;

[0033] An inclined plate is arranged at the top of the housing. A water accumulation plate is arranged at the low point of the inclined plate. A liquid outlet pipe is arranged on the housing. One end of the liquid outlet pipe passes through the housing and communicates with the water accumulation plate. The other end of the liquid outlet pipe is connected to a storage bucket.

[0034] Further, auger components are arranged in both the first conveying pipe and the second conveying pipe. The auger component includes a control motor, an auger shaft, and conveying blades. The control motor is installed on the corresponding conveying pipe. The auger shaft is rotatably installed inside the corresponding conveying pipe. The control motor is connected to the auger shaft to drive the auger shaft to rotate. The conveying blades are fixedly sleeved on the outer peripheral surface of the auger shaft;

[0035] A blanking assembly is arranged between the discharge end of the second-layer conveying component and the feed end of the third-layer conveying component, and between the discharge end of the third-layer conveying component and the feed end of the bottom-layer conveying component. The blanking assembly includes a rotary motor, a rotating shaft, and a mesh cylinder;

[0036] The mesh cylinder is fixedly connected inside the housing. The rotary motor is installed on the housing. The rotating shaft is rotatably installed inside the mesh cylinder. A plurality of blanking plates arranged at intervals are fixedly sleeved on the outer peripheral surface of the rotating shaft. The rotary motor is connected to the rotating shaft to drive the rotating shaft to rotate inside the mesh cylinder;

[0037] The outlets of the first conveying pipe and the second conveying pipe are respectively located above their corresponding mesh cylinders.

[0038] With the above technical solutions, the present invention has the following beneficial effects:

[0039] Through the arrangement of structures such as the first sieve and the second sieve, after the material passes through the top conveying component, it passes through the first sieve. The first sieve performs the first screening. Larger materials directly fall onto the adjacent lower-layer conveying component. The remaining materials pass through the first sieve and fall to the second sieve. At the second sieve, the second screening is performed by the vibration mechanism. After the second screening, medium-sized materials remain at the second sieve. Smaller materials fall into the second receiving tray and are directly sent to the bottom conveying component through the second conveying pipe. The materials remaining at the second sieve are sent into the first receiving tray through the linear movement mechanism and are sent to the third-layer conveying component through the first conveying pipe. By this method, the material is classified to avoid over-drying.

[0040] Through the arrangement of structures such as the cloth roller, the inclined guiding surface and the diversion inclined surface on the cloth roller, when the material first falls on the metal mesh belt of a certain layer of conveying component, as the metal mesh belt conveys the material, the regulating plate in contact with the material under the piled-up state contacts the cloth roller. The diversion inclined surface on the regulating plate diverts the piled-up material to both sides, so that the material is evenly spread on the metal mesh belt. Then, through the inclined guiding surface, the spread material is guided below the cloth roller. The materials below the cloth roller can ensure the same height. These two steps enable the piled-up material to be spread and make the most use of the entire surface of the metal mesh belt, while avoiding excessive thickness difference and uneven drying.

[0041] Through the arrangement of structures such as the partition plate and the dispersion mechanism, after the material passes through the partition plate, the partition plate divides the leveled and height-limited material into a form of strip-shaped intervals arranged. This form is more conducive to the flow of hot air and improves the drying uniformity. At the same time, to avoid too large a separation distance, resulting in the strip-shaped materials after separation being too dense and sticky, the second cam in the dispersion mechanism will be driven by the movement of the metal mesh belt. The metal mesh belt is in the form of a grid. The concave and convex parts of the grid push the second cam to generate an angular offset. Then, through the fifth spring, the second cam is reset. This cycle plays the effect of the second cam automatically and continuously slightly impacting the metal mesh belt to generate vibration. The second cam is arranged at the intervals of the strip-shaped materials. The vibration disperses the strip-shaped materials. Through multiple-step dynamic dispersion of separation plus vibration dispersion, the problems of accumulation and caking are solved, and the penetration effect of hot air is improved.

[0042] Through the settings of structures such as the shunt plate and the air distribution pipe, the shunt plate divides the hot air from the heating device from bottom to top into two parts. One part penetrates each layer of the conveying component upward from the bottom layer conveying component and dries the materials on each layer of the conveying component. The other part bypasses the bottom layer conveying component and flows directly upward to the conveying component on both sides of the conveying component, avoiding excessive drying of the materials on the bottom layer conveying component. Several strands of air will also be separated from this part of the air flow and enter the air distribution pipe. The air distribution pipe conveys this part of the hot air to the corresponding cloth rollers and flows out through the air outlet holes one and two on the cloth rollers. The flowing air generates a slight thrust on the materials, assisting the cloth rollers to accelerate the cloth feeding speed, and introducing the hot air into the interior of the cloth rollers, directly blowing on the surface of the materials during the cloth feeding process, shortening the total drying time.

[0043] Through the settings of structures such as the grid cylinder and the blanking plate, a temporary storage space is formed between adjacent blanking plates. The materials directly transported across layers through the first conveying pipe or the second conveying pipe and the materials sequentially transported on the current layer will enter different storage spaces respectively, and these materials will be placed on the corresponding conveying components in batches through the rotation of the blanking plate, so that these different materials are arranged at intervals, avoiding the mixing of materials in different drying stages, optimizing the hot air distribution at the same time, avoiding local over-drying or insufficiency, and the setting of the grid of the grid cylinder also avoids the blockage of the hot air from bottom to top caused by its own occupation. Brief Description of the Drawings

[0044] Figure 1 Schematic diagram of the overall structure of the present invention Figure 1 ;

[0045] Figure 2 Schematic diagram of the overall structure of the present invention Figure 2 ;

[0046] Figure 3 Schematic plan view of the internal structure of the present invention;

[0047] Figure 4 Schematic diagram of the internal structure of the outer shell of the present invention Figure 1 ;

[0048] Figure 5 Schematic diagram of the internal structure of the outer shell of the present invention Figure 2 ;

[0049] Figure 6 Schematic diagram of the structure of the conveying component of the present invention;

[0050] Figure 7 Schematic diagram of the overall structure of the screening component of the present invention;

[0051] Figure 8 Schematic diagram of the internal structure of the fixed guide plate of the present invention;

[0052] Figure 9 For the present invention Figure 8 Enlarged view of part A in

[0053] Figure 10 Schematic diagram of the internal structure of the connecting plate of the present invention;

[0054] Figure 11 Schematic diagram of the internal structure of the fixed frame of the present invention;

[0055] Figure 12 For the present invention Figure 11 Enlarged view of part B in

[0056] Figure 13 For the present invention Figure 11 Enlarged view of part C in

[0057] Figure 14 For the present invention Figure 10 Enlarged view of part D in

[0058] Figure 15 Schematic diagram of the vibration mechanism structure of the present invention;

[0059] Figure 16 Schematic diagram of the auger structure of the present invention;

[0060] Figure 17 Schematic diagram of the fabric roller structure of the present invention Figure 1 ;

[0061] Figure 18 Schematic diagram of the fabric roller structure of the present invention Figure 2 ;

[0062] Figure 19 Schematic diagram of the fabric roller structure of the present invention Figure 3 ;

[0063] Figure 20 Schematic diagram of the partition plate structure of the present invention Figure 1 ;

[0064] Figure 21 Schematic diagram of the partition plate structure of the present invention Figure 2 ;

[0065] Figure 22 Schematic diagram of the dispersion mechanism structure of the present invention;

[0066] Figure 23 Schematic diagram of the blanking component structure of the present invention.

[0067] In the figure: 1. Outer shell; 11. Discharge port; 12. Feed port; 13. Heating device; 14. Liquid outlet pipe; 15. Storage barrel; 16. Shunt plate; 17. Gas distribution pipe; 18. Inclined plate; 19. Water accumulation plate;

[0068] 2. Conveyor assembly; 21. Driving roller; 22. Driving mechanism; 23. Metal mesh belt; 24. Driving motor;

[0069] 3. Screening assembly; 31. Fixed guide plate; 32. Baffle plate; 33. First sieve; 34. Limiting plate; 35. Connecting plate; 36. Fixed bracket; 37. Second receiving tray; 38. First receiving tray; 39. Sliding groove; 310. Second sieve; 311. Slide rail; 312. First spring; 313. Slide block; 314. Second spring; 315. Fitting block; 316. Moving plate; 317. Rotating shaft; 318. Fixed frame; 319. Third spring; 320. Pushing block; 321. Driving sleeve; 322. Threaded rod; 323. Gear; 324. Rack; 325. Material retaining plate; 326. Fixed block; 327. Fixed plate; 328. Fixed rod; 329. Fourth spring; 330. Synchronous belt; 331. Linking rod; 332. First cam; 333. Receiving plate;

[0070] 4. Second conveying pipe; 5. First conveying pipe; 6. Auger component; 61. Control motor; 62. Auger shaft; 63. Conveying blade;

[0071] 7. Cloth feeding assembly; 71. Mounting plate; 72. Cloth feeding roller; 73. Adjusting plate; 74. Inclined guide surface; 75. Diverting inclined surface; 76. Air outlet one; 77. Air outlet two; 78. Partition plate; 79. Partition block; 710. Material guiding inclined surface;

[0072] 8. Dispersion mechanism; 81. Support rod; 82. Outer sleeve; 83. Second cam; 84. Fifth spring; 85. Contact part;

[0073] 9. Feeding component; 91. Rotating motor; 92. Rotating shaft; 93. Feeding plate; 94. Mesh cylinder. Detailed implementation mode

[0074] In order to make the content of the present invention easier to be clearly understood, the present invention will be further described in detail below according to specific embodiments in conjunction with the drawings.

[0075] Embodiment 1: As Figure 1-2 , Figure 4-5 , Figure 7 shown, a continuous belt drying device includes:

[0076] A housing 1, on which a discharge port 11 and a feed port 12 are respectively provided;

[0077] A heating device 13 arranged at the bottom of the housing 1, and the heating device 13 is adapted to introduce hot air into the housing 1 from bottom to top;

[0078] The conveying assembly 2 is disposed within the outer shell 1. The conveying assembly 2 includes four longitudinally spaced conveying members. Among the four conveying members, the conveying member at the top layer is the top-layer conveying member, the conveying member at the second layer is the second-layer conveying member, the conveying member at the third layer is the third-layer conveying member, and the conveying portion at the bottom layer is the bottom-layer conveying member. The conveying members are divided into a feed end and a discharge end. In two adjacent conveying members, the discharge end of one conveying member and the feed end of the other conveying member are correspondingly arranged. The feed end of the top-layer conveying member corresponds to the feed port 12, and the discharge end of the bottom-layer conveying member corresponds to the discharge port 11;

[0079] The screening assembly 3 is disposed at the discharge end of the top-layer conveying member. The screening assembly 3 is adapted to screen the materials passing through the top-layer conveying member;

[0080] The first conveying pipe 5 and the second conveying pipe 4 are disposed below the screening assembly. The first conveying pipe 5 is adapted to convey part of the screened materials to the feed end of the third-layer conveying member, and the second conveying pipe 4 is adapted to convey part of the screened materials to the feed end of the bottom-layer conveying member.

[0081] As Figure 6 shown, the screening assembly 3 includes a fixed guide plate 31, a connecting plate 35, and a fixed bracket 36 connected to the outer shell 1. Two ends of the connecting plate 35 are respectively connected to the bottom of the fixed guide plate 31 and the top of the fixed bracket 36;

[0082] A first screen 33 is disposed within the fixed guide plate 31, a second screen 310 is disposed within the fixed bracket 36. A first receiving tray 38 and a second receiving tray 37 are disposed at the bottom of the fixed bracket 36. The second receiving tray 37 is directly below the initial position of the second screen 310. A vibration mechanism is disposed between the second receiving tray 37 and the second screen 310. The vibration mechanism is adapted to vibrate the second screen 310 at the initial position. A linear movement mechanism is disposed within the fixed bracket 36. The linear movement mechanism is connected to the second screen 310 to be adapted to drive the second screen 310 to move towards the first receiving tray 38;

[0083] The first conveying pipe 5 is connected to the bottom of the first receiving tray 38, and the second conveying pipe 4 is connected to the bottom of the second receiving tray 37;

[0084] The conveying member includes two driving rollers 21, a metal mesh belt 23, and a driving motor 24;

[0085] Both of the two driving rollers 21 are rotatably installed within the outer shell 1. Transmission mechanisms 22 are disposed on both of the two driving rollers 21. The transmission mechanisms 22 are connected to the metal mesh belt 23. The driving motor 24 is installed on the outer shell 1. The driving motor 24 is connected to one of the driving rollers 21 to be adapted to drive the two driving rollers 21 to rotate, and further drive the metal mesh belt 23 to rotate.

[0086] As shown Figure 7 in FIG. Figure 7 , two limiting plates 34 are arranged inside the fixed guide plate 31. One end of the first screen 33 away from the top conveying member is horizontally inclined downward. A receiving plate 333 is arranged at the feeding end of the second layer conveying member. The receiving plate 333 is connected to the housing 1. The receiving plate 333 is adapted to block the materials that fail to pass through the mesh holes of the first screen 33, so that the materials fall on the corresponding conveying member.

[0087] As shown Figure 8-13 in FIG. Figure 8-13 , the linear movement mechanism includes a slide rail 311, a slider 313, a moving plate 316 and a fixed frame 318;

[0088] The slide rail 311 is connected inside the fixed support 36. The slider 313 is slidably arranged inside the slide rail 311. A first spring 312 is arranged inside the slide rail 311. Two ends of the first spring 312 are respectively connected to the slide rail 311 and the slider 313. The slider 313 is connected to the moving plate 316. A rotating shaft 317 is arranged between the moving plate 316 and the fixed frame 318. One end of the fixed frame 318 is connected to the moving plate 316 through the rotating shaft 317. The second screen 310 is arranged inside the fixed frame 318;

[0089] A second spring 314 is arranged inside the slider 313. The bottom of the second spring 314 is connected to the inner wall of the slider 313. The top of the second spring 314 is connected with a mating block 315. A sliding groove 39 is formed on the fixed support 36. The mating block 315 is located inside the sliding groove 39. A plurality of push blocks 320 arranged at intervals are connected to the surface of the metal mesh belt 23 corresponding to the top conveying member. The push blocks 320 are adapted to contact the mating block 315 driven by the metal mesh belt 23. The contacting surfaces of the push blocks 320 and the mating block 315 are both inclined. The push blocks 320 are adapted to push the mating block 315 to move after contacting the mating block 315;

[0090] Two symmetrically arranged fixing blocks 326 are arranged at the bottom of the fixed support 36. The fixing blocks 326 are adapted to support the other end of the fixed frame 318.

[0091] As shown Figure 12-15 in FIG. Figure 12-15 , a plurality of third springs 319 are arranged inside the fixed frame 318. The second screen 310 is connected to the plurality of third springs 319;

[0092] The vibration mechanism includes a linkage rod 331 and a plurality of first cams 332 fixedly sleeved outside the linkage rod 331. The linkage rod 331 is rotatably installed inside the housing 1. A synchronous belt 330 is jointly sleeved between the linkage rod 331 and the driving roller 21 close to itself in the top conveying member through a synchronous pulley. The driving roller 21 is adapted to drive the linkage rod 331 to rotate, so as to drive the first cams 332 to impact the bottom of the second screen 310;

[0093] A fixing rod 328 is commonly connected between two fixing blocks 326. An fixing plate 327 is fixedly sleeved outside the fixing rod 328. A material blocking plate 325 is movably sleeved outside the fixing rod 328. A fourth spring 329 is commonly connected between the material blocking plate 325 and the fixing plate 327. The fourth spring 329 is sleeved outside the fixing rod 328.

[0094] As Figure 14 shown, a barrier plate 32 is arranged on the fixed guide plate 31. A longitudinal movement mechanism is arranged in the connecting plate 35. The longitudinal movement mechanism is connected to the barrier plate 32 to drive the barrier plate 32 to move longitudinally.

[0095] The longitudinal movement mechanism includes a transmission sleeve 321, a threaded rod 322, a gear 323 and a rack 324. The transmission sleeve 321 is connected to the bottom of the barrier plate 32. The transmission sleeve 321 passes through the fixed guide plate 31 into the connecting plate 35. The threaded rod 322 is rotatably installed in the connecting plate 35. The transmission sleeve 321 is assembled outside the threaded rod 322. The gear 323 is fixedly sleeved outside the threaded rod 322. The rack 324 is connected to one side of the moving plate 316. The rack 324 is adapted to move along with the moving plate 316, thereby driving the gear 323 and the threaded rod 322 to rotate, and then driving the transmission sleeve 321 and the barrier plate 32 to move longitudinally.

[0096] The working principle of this embodiment is as follows:

[0097] The outer shell 1 serves as the protection and support for the entire drying equipment. During use, the granular material to be dried is put onto the top-layer conveying component through the feed port 12 on the outer shell 1 manually or by an external conveying device. There are four layers of conveying components in total. The material is conveyed from the top layer to the bottom layer and leaves the inside of the outer shell 1 through the discharge port 11 at the bottom-layer conveying component. During the entire conveying process, the drying of the material mainly relies on the heating device 13 at the bottom of the outer shell 1. The heating device 13 can heat the air and blow out hot air. The hot air enters the inside of the outer shell 1 from the bottom of the outer shell 1 through the heating device 13. After entering the inside of the outer shell 1, the hot air passes through the metal mesh belts 23 in each layer of the conveying component and dries the material located thereon. It should be noted that additional physical seals such as baffles or curtains can be provided at the feed port 12 and the discharge port 11 to avoid heat loss inside the outer shell 1.

[0098] When the conveying component works, the driving motor 24 is started. The driving motor 24 drives one of the driving rollers 21 to rotate. The driving roller 21 drives the other driving roller 21 and the metal mesh belt 23 to rotate through the transmission mechanism 22. In this embodiment, the transmission mechanism 22 is a conveyor belt sleeved on the two driving rollers 21 through synchronous pulleys. The metal mesh belt 23 and the conveyor belt can be fixed through connecting parts such as bolts. In another embodiment, the transmission mechanism 22 can be a sprocket and a chain. The sprocket is sleeved on the driving roller 21, and the chain is connected to the metal mesh belt 23. The sprocket rotates following the driving roller 21 and drives the chain and the metal mesh belt 23 to rotate. This part is the prior art and will not be described in detail here. It should be noted that the grid size of the metal mesh belt 23 allows hot air to pass through, but the material cannot directly pass through the grid;

[0099] The order of the four conveying components cooperating to convey materials is that the material falls on the top-layer conveying component through the feed port 12 at the housing 1. The material moves from the feed end to the discharge end of the top-layer conveying component, and then drops to the feed end of the adjacent second-layer conveying component, then moves to the discharge end of the second-layer conveying component and drops to the feed end of the adjacent third-layer conveying component, then moves to the discharge end of the third-layer conveying component and drops to the feed end of the adjacent bottom-layer conveying component. Finally, the material leaves the interior of the housing 1 through the discharge port 11 opened on the housing 1, completing the entire drying process;

[0100] To prevent the smaller materials from being over-dried when the granular materials of different sizes follow the entire drying route in sequence, a screening component 3 is provided at the discharge end of the top-layer conveying component. The screening component 3 mainly includes a first screen 33 and a second screen 310. The mesh holes of the second screen 310 are smaller than those of the first screen 33. When the material is preliminarily heated when passing from the feed end to the discharge end on the top-layer conveying component, in addition to the materials that were originally of different sizes, the materials that were originally of the same size will also change. These materials of different sizes will move along the fixed guide plate 31 to the first screen 33 when passing through the top-layer conveying component, and the materials are screened for the first time on the first screen 33. The larger-sized materials will directly pass through the first screen 33 and drop onto the second-layer conveying component. A receiving plate 333 is provided at the feed end of the second-layer conveying component. The receiving plate 333 can prevent the materials dropping onto the second-layer conveying component from falling out of the range of the second-layer conveying component;

[0101] Materials smaller than those directly passing through the first sieve 33 will pass through the mesh holes of the first sieve 33 and fall onto the second sieve 310. A vibration mechanism is provided at the bottom of the second sieve 310. The vibration mechanism is driven by a transmission roller 21 near the second sieve 310 in the top layer conveying component. A synchronous belt 330 is sleeved on the transmission roller 21 through a synchronous pulley. The synchronous belt 330 is also connected to a linkage rod 331 through a synchronous pulley. The transmission roller 21 drives the linkage rod 331 to rotate, and then drives the first cam 332 on the linkage rod 331 to rotate. The rotation of the first cam 332 intermittently impacts the second sieve 310 located within the fixed frame 318. After being impacted, the second sieve 310 vibrates longitudinally within the fixed frame 318 in cooperation with the third spring 319. It should be noted that the force generated by the first cam 332 only drives the second sieve 310 to vibrate, and the fixed frame 318 will not have a large longitudinal movement. The vibrating second sieve 310 performs a second screening on the materials thereon. Smaller materials will pass through the mesh holes of the second sieve 310 and fall into the second receiving tray 37, while relatively larger materials remain on the second sieve 310. It should be noted that a fixing block 326 is provided on the fixing bracket 36. The fixing block 326 supports the fixed frame 318. A baffle plate 325 is provided on the fixing block 326. The baffle plate 325 can prevent some materials from slipping when the second sieve 310 vibrates;

[0102] The materials remaining on the second sieve 310 are mainly fed into the first receiving tray 38 by a linear movement mechanism. The linear movement mechanism is mainly driven by a pushing block 320. The metal mesh belt 23 conveys materials driven by the driving roller 21, and the pushing block 320 is connected to the metal mesh belt 23. When the pushing block 320 moves with the metal mesh belt 23 to the mating block 315 in the linear movement mechanism, the inclined surface on the pushing block 320 contacts the inclined surface on the mating block 315, and the two surfaces abut against each other. The continuously moving pushing block 320 generates a horizontal thrust on the mating block 315. Under the action of this thrust, the mating block 315 and the slider 313 move within the slide rail 311. At the same time, the first spring 312 connected to the slider 313 is stretched. When the slider 313 moves, it drives the moving plate 316 to move, and the moving plate 316 drives the fixed frame 318 to move. During the movement of the fixed frame 318, it generates a thrust on the baffle plate 325. The baffle plate 325 rotates on the fixed rod 328 and releases the blockage of the second sieve 310. When the baffle plate 325 rotates, it twists the fourth spring 329. When the fixed frame 318 moves to a position close to the first receiving tray 38, the end of the fixed frame 318 close to the first receiving tray 38 loses the support of the fixed block 326. The other end of the fixed frame 318 is connected to the moving plate 316 through a rotating shaft 317. The unsupported end tilts downward, pouring the materials on the second sieve 310 into the first receiving tray 38. When this pouring process is completed, the moving stroke of the pushing block 320 driving the mating block 315 reaches the limit distance of the sliding groove 39, and the mating block 315 cannot move horizontally any further. At this time, the continuously moving pushing block 320 squeezes the mating block 315 through the inclined surface on it. The squeezed mating block 315 squeezes the second spring 314 in the slider 313, forcing the mating block 315 to retract into the slider 313. At this time, the pushing block 320 no longer exerts a force on the mating block 315. As the pushing block 320 continues to move, the pushing block 320 separates from the mating block 315. The mating block 315 that loses the acting force of the pushing block 320 is reset under the action of the second spring 314, and the slider 313 is reset through the first spring 312. The reset of the slider 313 drives the reset of the fixed frame 318. After the fixed frame 318 is reset, the baffle plate 325 loses the extrusion force and is reset through the fourth spring 329. At this time, the three-level classification of the materials is completed. Larger materials fall onto the second-layer conveying component, medium-sized materials are temporarily stored in the first receiving tray 38 and are conveyed to the third-layer conveying component through the first conveying pipe 5, and smaller materials are temporarily stored in the second receiving tray 37 and are conveyed to the bottom-layer conveying component through the second conveying pipe 4, so as to avoid excessive drying of the materials. It should be noted that when the entire fixed frame 318 is driven by the moving plate 316 to move towards the first receiving tray 38, it will not interfere with the first cam 332. A groove corresponding to a number of first cams 332 is provided at one end of the fixed frame 318 connected to the moving plate 316 through the rotating shaft 317.When the fixed frame 318 moves, the first cam 332 passes through the groove without contacting the fixed frame 318. However, when the fixed frame 318 has not moved into place, the first cam 332 still generates continuous vibration on the second screen 310. At this time, the vibration is not for screening. The screening work has been completed when the fixed frame 318 is not moving. The vibration when the fixed frame 318 moves can improve the fluidity of the material on the second screen 310, making the material on the second screen 310 pour into the first receiving tray 38 more smoothly. At the same time, when the fixed frame 318 moves to one end and loses the support of the fixed block 326 and tilts downward, the squeezed baffle 325 is located below the fixed frame 318 at this time. The weight of the fixed frame 318 itself is greater than the supporting force generated by the fourth spring 329 on the baffle 325. Therefore, the baffle 325 will not interfere with the normal downward tilt of the fixed frame 318, and it can ensure that the material falls into the first receiving tray 38;

[0103] A plurality of push blocks 320 arranged at intervals are provided on the metal mesh belt 23. The interval arrangement between the push blocks 320 can ensure that the first cam 332 generates sufficient vibration on the second screen 310, ensuring the screening quality. Since the fixed frame 318 drives the second screen 310 to move linearly as a whole when the second screen 310 feeds the screened material into the first receiving tray 38, therefore, the bottom of the first screen 33 will directly correspond to the second receiving tray 37. To prevent the material of the first screen 33 continuously coming through the fixed guide plate 31 from passing through the mesh holes of the first screen 33 and directly entering the second receiving tray 37, the baffle plate 32 on the fixed guide plate 31 needs to be raised when the fixed frame 318 moves, to prevent the material from continuously passing through the first screen 33. When the moving plate 316 moves, it drives the rack 324 to move. During the movement of the rack 324, it meshes with the gear 323 in the connecting plate 35 and drives the gear 323 to rotate. The rotating gear 323 drives the threaded rod 322 to rotate. When the threaded rod 322 rotates, the transmission sleeve 321 assembled outside it moves upward, thereby driving the baffle plate 32 to move upward. The upward-moving baffle plate 32 can block the material from passing through the first screen 33. The assembly method between the transmission sleeve 321 and the threaded rod 322 can be assembled through a ball nut. The rotation of the threaded rod 322 drives the assembled component to move linearly, which is a prior art, and its working principle will not be elaborated here in detail. When the second screen 310 pours the material on it into the first receiving tray 38, the moving plate 316 resets. The reset of the moving plate 316 drives the reverse movement of the rack 324. At this time, the rack 324 drives the gear 323 to reverse, the threaded rod 322 reverses, the transmission sleeve 321 and the baffle plate 32 reset. After the baffle plate 32 resets, the material loses the block and can pass through the first screen 33 normally, for the next round of multi-stage screening work. It should be noted that rotary seals need to be provided between the parts that need to be externally driven to rotate and the housing 1. The screening setting by size classification can not only classify the same kind of material with different sizes, but also be applicable to the unified drying treatment of different kinds of materials with different sizes.

[0104] Embodiment 2: As Figure 17-19 shown, on the basis of Embodiment 1, this embodiment further includes the following structure: A cloth-feeding assembly 7 is provided at the feeding end of the conveying component. The cloth-feeding assembly 7 includes a mounting plate 71 and a cloth roller 72. The mounting plate 71 is connected to the housing 1, and the cloth roller 72 is connected to the mounting plate 71;

[0105] On the surface of the cloth roller 72 facing the feeding end of the corresponding conveying component, an adjusting plate 73 is provided. An inclined guiding surface 74 is provided at the bottom of the adjusting plate 73, and diversion inclined surfaces 75 are provided on both sides of the adjusting plate 73. The diversion inclined surfaces 75 are adapted to divert the material to both sides, and the inclined guiding surface 74 is adapted to guide the material under the cloth roller 72.

[0106] As Figure 20-22 shown, a partition plate 78 is provided on the surface of the fabric roller 72 opposite to the adjusting plate 73. A number of spaced-apart partition blocks 79 are provided on the partition plate 78. A material guiding inclined surface 710 is provided on the side of the partition block 79 close to the adjusting plate 73. The partition blocks 79 are adapted to arrange the materials in a strip-shaped and spaced manner after passing through;

[0107] A number of spaced-apart dispersion mechanisms 8 are provided between two corresponding driving rollers 21 in the conveying component. The dispersion mechanism 8 is located between the partition plate 78 and the discharging end of the corresponding conveying component;

[0108] The dispersion mechanism 8 includes a support rod 81, an outer sleeve 82, and a fifth spring 84. The support rod 81 is fixedly connected inside the housing 1. The outer sleeve 82 is movably sleeved outside the support rod 81. A number of spaced-apart second cams 83 are fixedly sleeved outside the outer sleeve 82. The fifth spring 84 is sleeved outside the support rod 81. Two ends of the fifth spring 84 are respectively connected to the housing 1 and the outer sleeve 82. The contact position between the second cam 83 and the bottom of the metal mesh belt 23 is the abutting portion 85. When the metal mesh belt 23 moves, the mesh of the metal mesh belt 23 contacts the abutting portion 85 to cause an angular offset of the second cam 83.

[0109] As Figure 3 、 Figure 17-19 shown, this embodiment further includes the following structure on the basis of Embodiment 1: The air outlet of the heating device 13 extends into the housing 1 from the bottom of the housing 1. A flow dividing plate 16 is provided inside the housing 1. The flow dividing plate 16 divides the air flow in the air outlet. Part of the air flow blows to the bottom of the bottom conveying component, and the other part of the air flow blows to both sides of the bottom conveying component and flows upward;

[0110] An air distributing pipe 17 corresponding to the fabric roller 72 is provided on the housing 1. The air distributing pipe 17 is adapted to introduce the part of the air flow blowing to both sides into the corresponding fabric roller 72. Air outlet holes 76 and 77 are provided on the fabric roller 72. The air outlet hole 76 penetrates through the adjusting plate 73;

[0111] An inclined plate 18 is provided at the top of the housing 1. A water accumulating plate 19 is provided at the low point of the inclined plate 18. A liquid outlet pipe 14 is provided on the housing 1. One end of the liquid outlet pipe 14 passes through the housing 1 and communicates with the water accumulating plate 19. The other end of the liquid outlet pipe 14 is connected to a storage bucket 15.

[0112] The working principle of this embodiment is as follows:

[0113] At the feeding end of the conveying components on each layer, a cloth distributing assembly 7 is provided. The cloth roller 72 in the cloth distributing assembly 7 mainly serves to make the thickness of the piled materials uniform to ensure the uniformity of drying. Whether it is the materials that just fall on the top-layer conveying component through the feeding port 12 on the outer shell 1, the materials that enter each layer of conveying components in sequence, or the materials that cross layers through the first conveying pipe 5 or the second conveying pipe 4, they all need to be processed by the corresponding cloth rollers 72 on each layer to avoid the occurrence of piling;

[0114] The materials continuously moving under the drive of the metal mesh belt 23 first come into contact with the adjusting plate 73 on the cloth roller 72. The diverging inclined surface 75 on the adjusting plate 73 diverts the materials piled up and concentrated at the middle position of the metal mesh belt 23, diverting the piled materials to both sides, achieving the effect of spreading the materials on the metal mesh belt 23, improving the utilization rate of the surface area of the metal mesh belt 23. The spread materials gradually limit their height along the inclined guiding surface 74 and pass through the bottom of the cloth roller 72 under continuous movement. This process completes the spreading and thickness limitation of the materials. The materials pass through the inverted material inclined surface on the separating block 79 at the bottom of the cloth roller 72 and enter the gaps formed by multiple separating blocks 79. Finally, all the materials passing through the separating blocks 79 are arranged in a strip-like and spaced manner as a whole. The strip-like and spaced materials come above the dispersing mechanism 8 during continuous movement. The support rod 81 in the dispersing mechanism 8 serves as a support, with an outer sleeve 82 and a second cam 83 provided on the outside. The abutting part 85 of the second cam 83 contacts the metal grid. During the continuous movement of the metal grid, the concave and convex parts of the grid will cause intermittent thrust on the second cam 83. The second cam 83 distorted the fifth spring 84 under the thrust. When the thrust is lost, the fifth spring 84 resets and drives the second cam 83 to reset. Over and over again, the abutting part 85 of the second cam 83 will intermittently impact the metal mesh belt 23 slightly, so that the metal mesh belt 23 and the materials thereon vibrate. The position of the second cam 83 is set at the interval between adjacent strip-like materials. Under the vibration of the second cam 83, the originally strip-like materials are dispersed again. Through three steps of spreading, separating, and vibration dispersion, dynamic dispersion is achieved, which not only avoids the piling and caking of materials but also makes the dispersion of materials more uniform, enabling the hot air to have better penetration through the metal grid and strengthening the drying effect;

[0115] The heating device 13 blows hot air into the housing 1 from the bottom of the housing 1. A flow dividing plate 16 is arranged in the housing 1. The flow dividing plate 16 divides the hot air blown into the housing 1 into two streams. One stream directly acts on the bottom conveying component, and the hot air then passes through each conveying component layer by layer to achieve the effect of drying the materials in the partition layer. The other stream of hot air bypasses the bottom of the bottom conveying component and directly enters the upper space from both sides of the conveying component. This setting prevents the materials on the bottom conveying component from being over-dried. In this stream of hot air, part of the hot air flows into the fabric roller 72 through the air distribution pipe 17 corresponding to the fabric roller 72. The hot air flows out of the fabric roller 72 through the first air outlet 76 and the second air outlet 77. During the fabric conveying process, part of the hot air is directly blown onto the materials to perform primary heating on the passing materials, shortening the entire drying time and enhancing the drying effect. At the same time, the hot air ejected from the first air outlet 76 located on the flow dividing slope 75 can enhance the material flow dividing efficiency through the rapid flow of air, improve the effect of the paving step, and make the materials more dispersed to avoid adhesion;

[0116] The inclined plate 18 arranged at the top of the housing 1 can make the condensed water generated after drying the materials flow into the corresponding water collecting plate 19 along the inclination angle of the inclined plate 18. The condensed water flows in the water collecting plate 19 towards the liquid outlet pipe 14, and finally the condensed water flows into the storage bucket 15 for storage and can be processed and reused later.

[0117] Embodiment Three: As Figure 16 、 Figure 23 shown, auger components 6 are arranged in both the first conveying pipe 5 and the second conveying pipe 4. The auger component 6 includes a control motor 61, an auger shaft 62, and conveying blades 63. The control motor 61 is installed on the corresponding conveying pipe. The auger shaft 62 is rotatably installed in the corresponding conveying pipe. The control motor 61 is connected to the auger shaft 62 to drive the auger shaft 62 to rotate. The conveying blades 63 are fixedly sleeved on the outer peripheral surface of the auger shaft 62;

[0118] A blanking assembly 9 is arranged between the discharge end of the second-layer conveying component and the feed end of the third-layer conveying component, and between the discharge end of the third-layer conveying component and the feed end of the bottom conveying component. The blanking assembly 9 includes a rotating motor 91, a rotating shaft 92, and a mesh cylinder 94;

[0119] The mesh cylinder 94 is fixedly connected inside the housing 1. The rotating motor 91 is installed on the housing 1. The rotating shaft 92 is rotatably installed inside the mesh cylinder 94. A plurality of blanking plates 93 arranged at intervals are fixedly sleeved on the outer peripheral surface of the rotating shaft 92. The rotating motor 91 is connected to the rotating shaft 92 to drive the rotating shaft 92 to rotate inside the mesh cylinder 94;

[0120] The outlets of the first conveying pipe 5 and the second conveying pipe 4 are respectively located above their corresponding mesh cylinders 94.

[0121] The working principle of this embodiment is as follows:

[0122] A screw conveyor assembly is installed in the first conveying pipe 5 and the second conveying pipe 4 to prevent the materials in the first conveying pipe 5 and the second conveying pipe 4 from failing to flow normally onto the conveying components of the designated layer. The screw conveyor assembly drives the screw shaft 62 and the conveying blades 63 to rotate by starting the control motor 61, and the materials are conveyed through the rotation of the conveying blades 63. The screw conveyor is a prior art, and its working principle will not be described in detail here;

[0123] A blanking assembly 9 is provided between the first conveying pipe 5 and the conveying component of the corresponding layer at its outlet, and between the second conveying pipe 4 and the conveying component of the corresponding layer at its outlet. The blanking assembly 9 is a grid cylinder 94 fixedly arranged in the housing 1. A number of blanking plates 93 arranged at intervals are provided in the grid cylinder 94. A temporary storage space is formed between adjacent blanking plates 93. The materials directly conveyed across layers through the first conveying pipe 5 or the second conveying pipe 4 and the materials sequentially conveyed on the current layer will enter different storage spaces respectively, and the blanking plates 93 are driven to rotate by the rotating motor 91 to place these materials on the corresponding conveying components in batches, so that these different materials are arranged at intervals to avoid the mixing of materials in different drying stages. At the same time, the setting of the grid of the grid cylinder 94 also avoids the blockage of the hot air from bottom to top caused by its own occupation.

[0124] In the above specific embodiments, the technical problems solved by the present invention, the technical solutions and the beneficial effects are further described in detail. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A continuous belt drying equipment, characterized in that, Comprising: A housing (1) with a discharge port (11) and a feed port (12) respectively formed thereon; A heating device (13) disposed at the bottom of the housing (1), the heating device (13) being adapted to introduce hot air into the housing (1) from bottom to top; A conveying assembly (2) disposed in the housing (1), the conveying assembly (2) including four longitudinally spaced conveying members. Among the four conveying members, the conveying member at the top layer is the top-layer conveying member, the conveying member at the second layer is the second-layer conveying member, the conveying member at the third layer is the third-layer conveying member, and the conveying member at the bottom layer is the bottom-layer conveying member. The conveying members are divided into a feed end and a discharge end. Among two adjacent conveying members, the discharge end of one conveying member and the feed end of the other conveying member are correspondingly arranged. The feed end of the top-layer conveying member corresponds to the feed port (12), and the discharge end of the bottom-layer conveying member corresponds to the discharge port (11); A screening assembly (3) disposed at the discharge end of the top-layer conveying member, the screening assembly (3) being adapted to screen the material passing through the top-layer conveying member; A first conveying pipe (5) and a second conveying pipe (4) disposed below the screening assembly. The first conveying pipe (5) is adapted to convey part of the screened material to the feed end of the third-layer conveying member, and the second conveying pipe (4) is adapted to convey part of the screened material to the feed end of the bottom-layer conveying member; The screening assembly (3) includes a fixed guide plate (31), a connecting plate (35) and a fixed bracket (36) connected to the housing (1). Two ends of the connecting plate (35) are respectively connected to the bottom of the fixed guide plate (31) and the top of the fixed bracket (36); A first screen (33) is disposed in the fixed guide plate (31), a second screen (310) is disposed in the fixed bracket (36), a first receiving tray (38) and a second receiving tray (37) are disposed at the bottom of the fixed bracket (36). The second receiving tray (37) is located directly below the initial position of the second screen (310). A vibration mechanism is disposed between the second receiving tray (37) and the second screen (310), and the vibration mechanism is adapted to vibrate the second screen (310) at the initial position. A linear movement mechanism is disposed in the fixed bracket (36), and the linear movement mechanism is connected to the second screen (310) to drive the second screen (310) to move towards the first receiving tray (38); The first conveying pipe (5) is connected to the bottom of the first receiving tray (38), and the second conveying pipe (4) is connected to the bottom of the second receiving tray (37); Two limiting plates (34) are arranged in the fixed guide plate (31). One end of the first screen (33) away from the top conveying component is horizontally inclined downward. A receiving plate (333) is arranged at the feeding end of the second-layer conveying component. The receiving plate (333) is connected to the housing (1). The receiving plate (333) is adapted to block the materials that fail to pass through the mesh holes of the first screen (33), so that the materials fall on the corresponding conveying component.

2. The continuous belt drying equipment according to claim 1, characterized in that, The conveying component includes two driving rollers (21), a metal mesh belt (23) and a driving motor (24); Both of the two driving rollers (21) are rotatably installed in the housing (1). Transmission mechanisms (22) are arranged on both of the two driving rollers (21). The transmission mechanisms (22) are connected to the metal mesh belt (23). The driving motor (24) is installed on the housing (1). The driving motor (24) is connected to one of the driving rollers (21) to drive the two driving rollers (21) to rotate, and then drive the metal mesh belt (23) to rotate.

3. The continuous belt drying equipment according to claim 2, characterized in that, The linear movement mechanism includes a slide rail (311), a slider (313), a moving plate (316) and a fixed frame (318); The slide rail (311) is connected in the fixed bracket (36). The slider (313) is slidably arranged in the slide rail (311). A first spring (312) is arranged in the slide rail (311). Two ends of the first spring (312) are respectively connected to the slide rail (311) and the slider (313). The slider (313) is connected to the moving plate (316). A rotating shaft (317) is arranged between the moving plate (316) and the fixed frame (318). One end of the fixed frame (318) is connected to the moving plate (316) through the rotating shaft (317). The second screen (310) is arranged in the fixed frame (318); A second spring (314) is arranged in the slider (313). The bottom of the second spring (314) is connected to the inner wall of the slider (313). The top of the second spring (314) is connected with a mating block (315). A sliding groove (39) is formed on the fixed bracket (36). The mating block (315) is located in the sliding groove (39). A plurality of spaced push blocks (320) are connected to the surface of the metal mesh belt (23) corresponding to the top conveying component. The push blocks (320) are adapted to contact the mating block (315) driven by the metal mesh belt (23). The contacting surfaces of the push blocks (320) and the mating block (315) are both inclined. The push blocks (320) are adapted to push the mating block (315) to move after contacting the mating block (315); Two symmetrically arranged fixing blocks (326) are arranged at the bottom of the fixed bracket (36). The fixing blocks (326) are adapted to support the other end of the fixed frame (318).

4. The continuous belt drying equipment according to claim 3, wherein A number of third springs (319) are arranged inside the fixed frame (318), and the second screen (310) is connected to the number of third springs (319); The vibration mechanism includes a linkage rod (331) and a number of first cams (332) fixedly sleeved outside the linkage rod (331). The linkage rod (331) is rotatably installed inside the housing (1). A synchronous belt (330) is commonly sleeved between the linkage rod (331) and the transmission roller (21) close to itself in the top layer conveying component through a synchronous pulley. The transmission roller (21) is adapted to drive the linkage rod (331) to rotate, and then drive the first cam (332) to impact the bottom of the second screen (310); A fixed rod (328) is commonly connected between the two fixed blocks (326). A fixing plate (327) is fixedly sleeved outside the fixed rod (328). A material blocking plate (325) is movably sleeved outside the fixed rod (328). A fourth spring (329) is commonly connected between the material blocking plate (325) and the fixing plate (327), and the fourth spring (329) is sleeved outside the fixed rod (328).

5. The continuous belt drying equipment according to claim 3 or 4, characterized in that, A blocking plate (32) is arranged on the fixed guide plate (31). A longitudinal movement mechanism is arranged inside the connecting plate (35), and the longitudinal movement mechanism is connected to the blocking plate (32) to be adapted to drive the blocking plate (32) to move longitudinally; The longitudinal movement mechanism includes a transmission sleeve (321), a threaded rod (322), a gear (323), and a rack (324). The transmission sleeve (321) is connected to the bottom of the blocking plate (32). The transmission sleeve (321) passes through the fixed guide plate (31) into the connecting plate (35). The threaded rod (322) is rotatably installed inside the connecting plate (35). The transmission sleeve (321) is assembled outside the threaded rod (322). The gear (323) is fixedly sleeved outside the threaded rod (322). The rack (324) is connected to one side of the moving plate (316). The rack (324) is adapted to move following the moving plate (316), and then drive the gear (323) and the threaded rod (322) to rotate, so as to drive the transmission sleeve (321) and the blocking plate (32) to move longitudinally.

6. The continuous belt drying equipment according to claim 2, characterized in that, A cloth feeding component (7) is arranged at the feeding end of the conveying component. The cloth feeding component (7) includes a mounting plate (71) and a cloth roller (72). The mounting plate (71) is connected to the housing (1), and the cloth roller (72) is connected to the mounting plate (71); An adjusting plate (73) is arranged on the surface of the cloth roller (72) facing the feeding end of the corresponding conveying component. An inclined guiding surface (74) is arranged at the bottom of the adjusting plate (73). Diversion inclined surfaces (75) are arranged on both sides of the adjusting plate (73). The diversion inclined surfaces (75) are adapted to divert materials to both sides, and the inclined guiding surface (74) is adapted to guide materials under the cloth roller (72).

7. The continuous belt drying equipment according to claim 6, characterized in that, A partition plate (78) is provided on the surface of the fabric roller (72) opposite to the adjusting plate (73). A number of spaced partition blocks (79) are provided on the partition plate (78). A material guiding inclined surface (710) is provided on the side of the partition block (79) close to the adjusting plate (73). The partition blocks (79) are adapted to arrange the materials in a strip-like and spaced manner after passing through. A number of spaced dispersion mechanisms (8) are provided between two corresponding driving rollers (21) in the conveying component. The dispersion mechanism (8) is located between the partition plate (78) and the discharge end of the corresponding conveying component. The dispersion mechanism (8) includes a support rod (81), an outer sleeve (82), and a fifth spring (84). The support rod (81) is fixedly connected inside the housing (1). The outer sleeve (82) is movably sleeved outside the support rod (81). A number of spaced second cams (83) are fixedly sleeved outside the outer sleeve (82). The fifth spring (84) is sleeved outside the support rod (81). Two ends of the fifth spring (84) are respectively connected to the housing (1) and the outer sleeve (82). The position where the second cam (83) contacts the bottom of the metal mesh belt (23) is the abutting part (85). When the metal mesh belt (23) moves, the mesh of the metal mesh belt (23) contacts the abutting part (85) to cause an angular offset of the second cam (83).

8. The continuous belt drying equipment according to claim 6 or 7, characterized in that The air outlet of the heating device (13) extends into the housing (1) from the bottom of the housing (1). A flow dividing plate (16) is provided inside the housing (1). The flow dividing plate (16) divides the air flow in the air outlet. A part of the air flow blows towards the bottom of the bottom layer conveying component, and the other part of the air flow blows towards both sides of the bottom layer conveying component and flows upward. An air distribution pipe (17) corresponding to the fabric roller (72) is provided on the housing (1). The air distribution pipe (17) is adapted to introduce the part of the air flow blowing towards both sides into the corresponding fabric roller (72). The fabric roller (72) is provided with a first air outlet hole (76) and a second air outlet hole (77). The first air outlet hole (76) penetrates through the adjusting plate (73). An inclined plate (18) is provided at the top of the housing (1). A water accumulation plate (19) is provided at the low point of the inclined plate (18). A liquid outlet pipe (14) is provided on the housing (1). One end of the liquid outlet pipe (14) passes through the housing (1) and communicates with the water accumulation plate (19). The other end of the liquid outlet pipe (14) is connected to a storage bucket (15).

9. The continuous belt drying equipment according to claim 1, wherein, The first conveying pipe (5) and the second conveying pipe (4) are both provided with auger components (6). The auger component (6) includes a control motor (61), an auger shaft (62) and conveying blades (63). The control motor (61) is installed on the corresponding conveying pipe. The auger shaft (62) is rotatably installed in the corresponding conveying pipe. The control motor (61) is connected to the auger shaft (62) to drive the auger shaft (62) to rotate. The conveying blades (63) are fixedly sleeved on the outer peripheral surface of the auger shaft (62). A blanking assembly (9) is provided between the discharge end of the second-layer conveying component and the feed end of the third-layer conveying component, and between the discharge end of the third-layer conveying component and the feed end of the bottom-layer conveying component. The blanking assembly (9) includes a rotating motor (91), a rotating shaft (92) and a mesh cylinder (94). The mesh cylinder (94) is fixedly connected in the housing (1). The rotating motor (91) is installed on the housing (1). The rotating shaft (92) is rotatably installed in the mesh cylinder (94). A plurality of blanking plates (93) arranged at intervals are fixedly sleeved on the outer peripheral surface of the rotating shaft (92). The rotating motor (91) is connected to the rotating shaft (92) to drive the rotating shaft (92) to rotate in the mesh cylinder (94). The outlets of the first conveying pipe (5) and the second conveying pipe (4) are respectively located above their corresponding mesh cylinders (94).

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