A disc dryer for environmental protection solid waste treatment

Abstract

This invention relates to the field of environmental engineering, and more particularly to a disc dryer for solid waste treatment in environmental protection. The dryer has a cylindrical body at the top, inside which are a heat exchange tube mechanism and a heat exchange disc mechanism. A main drive shaft is rotatably mounted inside the dryer, and multiple rake arms are mounted on the main drive shaft. Each rake arm has multiple rake teeth, allowing the main drive shaft to drive the rake arms and rake teeth to turn, spread, and convey the solid waste on the heat exchange disc mechanism. In this invention, the rake teeth of the dryer are equipped with crushing claws, limiting plates, and a U-shaped guide groove avoidance mechanism, which can classify and process the solid waste passing through the rake teeth. Crustable agglomerates are crushed under compression, while hard, difficult-to-crush debris is pushed aside by the crushing claws and guided into a collection cylinder for centralized processing, thereby reducing the impact of hard debris on the crushing disc and the overall material, thus improving drying efficiency.

Description

Technical Field

[0001] This invention relates to the field of environmental engineering technology, and in particular to a disc dryer for solid waste treatment in environmental protection. Background Technology

[0002] A disc dryer is a type of equipment commonly used for the continuous drying of solid materials. It typically provides heat through multiple layers of heat exchange discs and uses rotating rake arms and rake teeth to turn, spread, and convey the material, ensuring that the material makes full contact with the heat exchange discs during the layer-by-layer movement, thereby reducing the moisture content of the material. It is often used in the environmental protection field for the reduction of sludge, dewatered solid waste, and other water-containing solid waste.

[0003] In actual solid waste treatment processes, the composition of materials to be dried is usually quite complex. In addition to the main solid material that needs to be dried, it may also contain hard impurities such as stones and metal blocks. Furthermore, the material itself may contain entangled fibers, agglomerated particles, and agglomerates formed due to moisture. If these agglomerated materials are not properly treated, they are prone to forming large agglomerates during the drying process, making it difficult for the material's internal components to fully contact the heat exchange surface, thus affecting the uniform drying of the material. Existing disc dryers typically rely on rake teeth to turn and convey the material. Traditional rake tooth structures are simple and lack effective mechanisms for handling and decomposing agglomerated solid wastes. Therefore, a solution is urgently needed. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a disc dryer for environmentally friendly solid waste treatment.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A disc dryer for solid waste treatment in environmental protection includes a machine body, a cylinder body on the upper part of the machine body, a heat exchange tube mechanism and a heat exchange disc mechanism inside the cylinder body, a main drive shaft rotatably installed inside the machine body, a plurality of rake arms are installed on the main drive shaft, and a plurality of rake teeth are installed on each rake arm, so that the main drive shaft drives the rake arms and rake teeth to turn, spread and transport the solid waste on the heat exchange disc mechanism. The rake arm is provided with a crushing claw mechanism and a limiting plate on one side. A material passage is formed between the crushing claw mechanism and the limiting plate. The crushing claw mechanism is used to crush the crushable agglomerates that enter the material passage. The end of the crushing claw is provided with an inclined surface for forming a guiding contact with hard debris. A movable disc is slidably mounted on one side of the main drive shaft. The movable disc is elastically reset with the rake arm through a return spring. A connecting disc is rotatably mounted on one side of the movable disc. The connecting disc drives the crushing claw mechanism to reciprocate through a linkage mechanism to achieve extrusion crushing. The crushing claw mechanism includes a crushing claw, a connecting plate one, and a connecting plate two. The connecting plate two is slidably connected to the rake teeth and is linked to the linkage mechanism. A guide pin three is provided at the upper end of the crushing claw, and a spiral guide groove is provided on the rake teeth to form a limiting sliding fit with the guide pin three. The spiral guide groove includes a long guide groove and a stop groove.

[0006] Preferably, the bottom of the movable disc is provided with a guide pin, which forms a periodic guiding fit with the flower-shaped guide disc provided on the heat exchange disc mechanism, so that when the main drive shaft drives the rake arm to rotate, the movable disc moves back and forth along the axial direction of the main drive shaft. The movable disc forms a limited sliding connection with the connecting disc through multiple limit pins, and the limit pins and the connecting disc are connected by a return spring.

[0007] Preferably, the linkage mechanism includes a connecting rod and a plurality of guide pins mounted on the connecting rod. One end of the connecting rod is fixedly mounted on one end of the connecting plate, and the guide pins are in a limiting sliding connection with the guide frame on one side of the connecting plate.

[0008] Preferably, the rake arm is hollow inside and has multiple guide boxes connected to one side. One side of the guide box is connected to the rake teeth. A waste box is provided in the middle of the rake teeth. A collection cylinder is installed inside the rake arm and is pressed by a locking cover.

[0009] Preferably, a first connecting plate is slidably mounted on one side of the rake teeth, and a second connecting plate is rotatably connected to one end of the first connecting plate. A crushing claw is provided on one side of the second connecting plate, and a torsion spring is installed at the rotatable connection between the crushing claw and the second connecting plate.

[0010] Preferably, one end of the connecting plate is equipped with multiple guide frames. A guide groove is opened in the middle of the guide frame, and a guide pin 2 is slidably installed inside the groove. Each guide pin 2 is rotatably installed in the middle of the connecting rod. One end of the connecting rod is connected to the connecting plate. When the connecting plate generates axial displacement, the connecting rod moves synchronously and drives each guide pin 2 to form a sliding constraint cooperation with the guide frame.

[0011] Preferably, the position of the limiting plate can be adjusted by adjusting the screw to change the position of the limiting plate relative to the crushing claw, wherein the limiting plate is slidably installed in the middle of the rake teeth by a slider, and the adjusting screw is rotatably installed on the side wall of the rake teeth and screwed to the limiting plate.

[0012] Preferably, the rake arm has a raised strip structure inside, which is aligned with the groove on the outer wall of the collecting cylinder to complete the alignment installation.

[0013] Preferably, the guide pin three forms a limiting sliding fit with the spiral guide groove opened on the top side of the middle part of the rake tooth. The spiral guide groove includes a spiral groove body, a long guide groove and a stop groove. The long guide groove is used to guide the movement direction of the crushing claw. The stop groove is recessed a distance behind the spiral groove body to limit the corresponding position of the crushing claw.

[0014] The beneficial effects of this invention are as follows: In this invention, the dryer's rake teeth are equipped with crushing claws, limiting plates, and a U-shaped guide groove avoidance mechanism, which can classify and process solid waste passing through the rake teeth, crushing crushable agglomerates under compression, and pushing hard debris that is difficult to crush to avoid it. At the same time, the hard debris is guided into the collection cylinder for centralized processing, thereby reducing the impact of hard debris on the crushing disc and the overall material, thus improving drying efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the internal structure of a disc dryer for solid waste treatment for environmental protection proposed in this invention; Figure 2 This is a schematic diagram of the external structure of a disc dryer for solid waste treatment for environmental protection proposed in this invention. Figure 3 This is a schematic diagram of the installation structure of the heat exchanger plate mechanism proposed in this invention; Figure 4 This is a schematic diagram of the heat exchanger plate mechanism and rake arm structure proposed in this invention. Figure 1 ; Figure 5 This is a schematic diagram of the heat exchanger plate mechanism and rake arm structure proposed in this invention. Figure 2 ; Figure 6 This is a schematic diagram of the external structure of the rake arm proposed in this invention; Figure 7 This is a schematic diagram of the movable disk mounting structure proposed in this invention; Figure 8 This is a schematic diagram of the rake arm connection structure proposed in this invention; Figure 9 This is a schematic diagram of the external structure of the rake teeth proposed in this invention. Figure 1 ; Figure 10 This is a schematic diagram of the unfolded limiting plate proposed in this invention; Figure 11 This is a schematic diagram of the external structure of the rake teeth proposed in this invention. Figure 2 ; Figure 12 This is a schematic diagram of a partial structure of the rake teeth proposed in this invention; Figure 13 This is a schematic diagram of the spiral guide groove structure proposed in this invention; Figure 14 This is a schematic diagram of the connection structure of the movable disk and the connecting disk proposed in this invention; Figure 15 This is a schematic diagram of the collection cylinder installation structure proposed in this invention.

[0016] In the diagram: 1. Machine body; 2. Cylinder; 3. Heat exchange tube mechanism; 31. Mounting bracket; 32. Main drive shaft; 4. Rake arm; 5. Rake teeth; 51. Material chute; 6. Heat exchange plate mechanism; 7. Movable plate; 71. Connecting plate; 72. Return spring one; 73. Guide pin one; 8. Flower-shaped guide plate; 9. Connecting plate one; 91. Connecting plate two; 92. Guide pin two; 10. Limiting plate; 11. Adjusting screw; 12. Crushing claw; 121. Inclined surface; 122. Guide pin three; 13. Discharge port; 14. Guide box; 15. Waste box; 16. U-shaped guide groove; 161. Long guide groove; 162. Stop groove; 17. Connecting rod; 18. Return spring two; 19. Locking cover; 20. Collection cylinder; 201. Feed inlet; 21. Guide frame. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0018] Reference Figure 1-5 A disc dryer for solid waste treatment for environmental protection includes a body 1, a cylinder 2 on the upper part of the body 1, a treatment chamber for containing solid waste to be treated inside the cylinder 2, and a main drive shaft 32 located in the middle of the body 1, which is driven to rotate by a drive mechanism inside the body 1.

[0019] Furthermore, a heat exchange tube mechanism 3 is provided inside the cylinder body 2. The heat exchange tube mechanism 3 is connected to the heat exchange plate mechanism 6 inside the machine body 1. The heat exchange tube mechanism 3 is fixedly installed on the upper part of the machine body 1 through the mounting bracket 31. Multiple heat exchange plate mechanisms 6 are arranged in layers along the axial direction of the main drive shaft 32, and a processing area for material conveying is formed between adjacent heat exchange plate mechanisms 6.

[0020] The heat exchange plate mechanism 6 includes multiple heat exchange plates arranged in an alternating manner. The heat exchange plates are used to receive and process materials and form a continuous material conveying path between different plate layers. Each heat exchange plate is equipped with a rake arm 4, which is rotatably mounted on the main drive shaft 32. Multiple rake teeth 5 are provided on the rake arm 4.

[0021] Next, a movable disc 7 is slidably mounted on one end of the main drive shaft 32, and a connecting disc 71 is rotatably connected to one side of the movable disc 7. The connecting disc 71 is movably sleeved on the outside of the rake arm 4.

[0022] In actual operation, the solid waste to be processed enters the internal processing area through the feed hopper at the top of the cylinder 2. The main drive shaft 32 rotates under the action of the external drive mechanism, driving the rake arm 4 and rake teeth 5 to rotate synchronously. During the rotation, the rake teeth 5 push and spread the material on the surface of the heat exchange plate mechanism 6, so that the material forms a relatively uniform distribution on the surface of the heat exchange plate mechanism 6, and moves to the next layer of heat exchange plate mechanism 6 along a predetermined path.

[0023] Furthermore, the rake arm 4 is provided with a material passage 51, which is used for the processed material to pass through. While the rake teeth 5 push the material, some of the material passes directly through the material passage 51, and some of the agglomerated material is guided to the area where the material passage 51 is located.

[0024] Reference Figure 6-11 A return spring 72 is installed at the sliding connection between the movable disc 7 and the rake arm 4. When the movable disc 7 moves along the axial direction of the rake arm 4, the return spring 72 deforms. Then, a guide pin 73 is installed at the bottom of the movable disc 7. The guide pin 73 and the flower-shaped guide disc 8 form a guiding fit.

[0025] Furthermore, the flower-shaped guide plate 8 is installed on the upper part of each heat exchange plate, and the outer edge of the flower-shaped guide plate 8 has a periodic concave and convex profile. When the main drive shaft 32 drives the rake arm 4 to rotate, the movable plate 7 undergoes a corresponding position change under the guidance of the guide pin 73 and the flower-shaped guide plate 8, thereby driving the movable plate 7 and the connecting plate 71 to move axially, and obtaining a reset effect through the reset spring 72.

[0026] Furthermore, the rake arm 4 is hollow inside and has multiple guide boxes 14 connected to one side. One side of the guide box 14 is connected to the rake teeth 5. The rake teeth 5 have a waste box 15 in the middle. The waste box 15 is used to store hard-to-crush solid waste and stores it into the rake arm 4 through the guide box 14. Next, a connecting plate 9 is slidably installed on one side of the rake tooth 5. A connecting plate 91 is rotatably connected to one end of the connecting plate 9. A crushing claw 12 is provided on one side of the connecting plate 91, and a torsion spring is installed at the rotatable connection between the two. The crushing claw 12 is driven to deflect towards the rake tooth 5 by the pre-tightening force of the torsion spring. In addition, a number of guide frames 13 are installed on one end of the connecting plate 9. A guide groove is opened in the middle of the guide frame 13, and a guide pin 92 is slidably installed inside the groove. Each guide pin 92 is rotatably installed in the middle of the connecting rod 17. One end of the connecting rod 17 is connected to the connecting plate 71. When the connecting plate 71 is axially displaced, the connecting rod 17 is displaced synchronously and drives each guide pin 92 to form a sliding constraint fit with the guide frame 13. Furthermore, a limiting plate 10 is adjustablely installed at one end of the rake tooth 5, and a crushing claw 12 is provided on the side away from the limiting plate 10. A gap is left between the crushing claw 12 and the limiting plate 10 to form a material passage trough 51. The limiting plate 10 is used to limit the solid waste entering the crushing area, so that the material entering the material passage trough 51 is kept within the predetermined passage area.

[0027] Furthermore, the crushing claw 12 is used to crush the agglomerated solid waste entering the feed trough 51. The end of the crushing claw 12 is provided with an inclined surface 121, which is set towards the material entry direction, so that the crushing claw 12 has a certain guiding effect when it comes into contact with the material.

[0028] In actual processing, the dried solid waste moves with the rake teeth 5 to between the crushing claws 12 and the limiting plate 10. Normal materials can pass directly through the rake teeth 5 and the feed chute 51. When the material is fiber, agglomerate, or solid agglomerate formed by the bonding of multiple smaller particles, it will be intercepted by the feed chute 51. The overall structure can be crushed under the squeezing action of the crushing claws 12. The size of the crushed material is reduced and it can continue to be conveyed to the subsequent area through the feed chute 51.

[0029] For hard debris that cannot be directly crushed, when it is intercepted by the feed chute 51, the end of the crushing claw 12 is subjected to force and guided by the inclined surface 121, and deflected at the rotation axis of the crushing claw 12.

[0030] Reference Figure 11-15 The position of the limiting plate 10 can be adjusted by adjusting the screw 11. When the adjusting screw 11 is rotated, the position of the limiting plate 10 relative to the crushing claw 12 can be changed, thereby changing the effective width of the feed trough 51. Specifically, the limiting plate 10 is slidably installed in the middle of the rake tooth 5 by a slider, and the adjusting screw 11 is rotatably installed on the side wall of the rake tooth 5 and screwed to the limiting plate 10.

[0031] Furthermore, a guide pin 122 is provided on the upper part of the crushing claw 12. The guide pin 122 and the spiral guide groove 16 opened on the top side of the middle part of the rake tooth 5 form a limiting sliding fit. The spiral guide groove 16 includes a spiral groove body, a long guide groove 161 and a stop groove 162. The long guide groove 161 is used to guide the movement direction of the crushing claw 12. The stop groove 162 is recessed a distance behind the spiral groove body to limit the corresponding position of the crushing claw 12, so as to prevent the guide pin 122 from directly realizing the spiral movement through the spiral groove body, thereby limiting the movement range of the crushing claw 12.

[0032] Therefore, in practical applications, when the crushing claw 12 is blocked by hard debris, a stable contact surface cannot be formed at the end of the crushing claw 12, and the hard debris will contact the inclined surface 121 at the end of the crushing claw 12. Since the inclined surface 121 has an inclined structure, the force exerted by the hard debris on the crushing claw 12 can form a component force that causes the crushing claw 12 to make an avoidance movement, so that the crushing claw 12 will displace or rotate in the predetermined movement direction to avoid the obstacle when it is subjected to greater resistance.

[0033] After the crushing claw 12 makes an avoidance movement, the guide pin 3 122 will enter the long guide groove 161 under the guidance of the U-shaped groove body. The end stroke of the long guide groove 161 is longer, which makes the crushing claw 12 move further back when resetting. After avoiding the obstacle, the claw structure will hook and grab the hard impurities and bring them into the waste box 15 in the middle of the rake teeth 5 with the resetting movement, so that the crushing claw 12 can get away from the direct obstruction of hard impurities within a certain range. Thus, during the processing, it is possible to distinguish between agglomerated materials that need to be crushed and hard impurities that are not suitable for forced crushing, reducing the occurrence of hard impurities in the drying process.

[0034] Under normal material flow conditions, guide pin 3 122 is limited by stop groove 162, realizing linear reciprocating motion.

[0035] Furthermore, a collection cylinder 20 is installed inside the rake arm 4. The collection cylinder 20 is used to receive hard debris entering the waste box 15. The upper part of the collection cylinder 20 is provided with a feed inlet 201, which corresponds to the debris conveying path inside the waste box 15, so that the separated hard debris can enter the collection cylinder 20 through the feed inlet 201. A locking cover 19 is screwed to the end of the rake arm 4. The locking cover 19 is used to seal the collection cylinder 20.

[0036] When a certain amount of hard debris accumulates inside the collection cylinder 20, the collection cylinder 20 can be removed by opening the locking cover 19. Stones, metal blocks, and other debris that are unsuitable for subsequent processing can then be centrally cleaned. After cleaning, the collection cylinder 20 can be reinstalled and the locking cover 19 tightened to restore normal operation.

[0037] The rake arm 4 has a raised strip structure inside, which is aligned with the groove on the outer wall of the collection cylinder 20 to complete the alignment installation.

[0038] Furthermore, the movable plate 7 is connected to the connecting plate 71 by multiple limiting posts, and the limiting posts and the connecting plate 71 are connected by a return spring 18.

[0039] In this embodiment, the solid waste to be processed is put into the cylinder 2, and the drive system of the machine body 1 and the heat exchange tube mechanism 3 are started. After the heat exchange tube mechanism 3 is running, it provides the heat required for drying to the heat exchange plate mechanism 6, and the main drive shaft 32 rotates synchronously, driving the rake arm 4 and rake teeth 5 to move continuously.

[0040] After solid waste enters the cylinder 2, it first falls onto the surface of the heat exchange plate mechanism 6 of the corresponding level. As the rake teeth 5 continue to rotate, the solid waste is pushed, turned over and spread out, forming a relatively dispersed material layer on the surface of the heat exchange plate mechanism 6, and gradually moves to the corresponding lower processing area. After continuous drying, it is finally discharged from the machine outlet.

[0041] During this drying process, while the main drive shaft 32 drives the rake arm 4 to rotate, the guide pin 73 at the bottom of the movable disc 7 periodically passes through the concave and convex contours of the flower-shaped guide disc 8, causing the movable disc 7 to move periodically in a predetermined direction, thereby causing the linkage rod 17 to move accordingly.

[0042] After the connecting rod 17 moves, it drives multiple guide pins 92 to move synchronously. The guide pins 92 slide along the guide groove in the middle of the guide frame 13, causing the connecting plate 9 to move with the guide pins 92. Then, the connecting plate 9, together with the connecting plate 91, drives the crushing claw 12 to change its working position periodically. Thus, the crushing claw 12 can reciprocate within a predetermined working range as the main drive shaft 32 rotates continuously.

[0043] When solid waste contains fibrous entanglement, particle adhesion, or agglomerates formed by the adhesion of multiple material particles, such materials may still maintain internal moisture and agglomeration after passing through the multi-layer heat exchange plate mechanism 6. Therefore, such materials move with the rake teeth 5 and enter the corresponding area of ​​the feed trough 51. For agglomerates whose overall size is larger than that of normal loose materials, they are constrained by the limiting plate 10 when passing through the feed trough 51 and come into contact with the crushing claws 12.

[0044] At this time, the periodic movement of the crushing claw 12 will compress the agglomerates. The crushing claw 12 and the limiting plate 10 together exert a compressive effect on the agglomerates, causing the fiber entanglements, adhesive blocks and other agglomerates with a certain degree of breakability to gradually break down.

[0045] When agglomerates are compressed, their overall structure gradually loosens and forms smaller material particles. The crushed material can then re-enter the normal material conveying path and continue moving to the next heat exchange plate mechanism 6 with the rake teeth 5. Therefore, during the solid waste drying process, some agglomerates formed due to water content, fibers, or adhesion can be crushed simultaneously, reducing the impact of larger agglomerates on the normal spreading and conveying of materials.

[0046] For stones, metal blocks, and other hard debris mixed in with solid waste, continuous forced compression is not used for treatment. When hard debris enters the feed trough 51 and comes into contact with the crushing claw 12, the resistance it generates to the crushing claw 12 increases significantly due to the high resistance of the hard debris itself to damage.

[0047] At this point, the end of the crushing claw 12 cannot form a stable force-bearing surface with the hard impurities. Therefore, it will be guided and avoided by the inclined surface 121. The force exerted by the hard impurities on the crushing claw 12 can form a component force that causes the crushing claw 12 to move in an avoidance motion, so that the crushing claw 12 will not continuously exert rigid pressure on the hard impurities with its end face. After the crushing claw 12 encounters greater resistance, the crushing claw 12 drives the guide pin 3 122 to move along the U-shaped guide groove 16, so that the crushing claw 12 produces a predetermined avoidance displacement. As the avoidance process proceeds, the guide pin 3 122 enters the long guide groove 161, so that the crushing claw 12 obtains more corresponding backward movement space, thereby allowing the crushing claw 12 to gradually get away from the direct obstruction of the hard impurities.

[0048] After the hard debris is removed from the main force-bearing position of the crushing claw 12, the crushing claw 12 gradually returns to its working position under the action of the return spring 18. During the reset process, the crushing claw 12 can exert a certain hooking and pulling effect on the hard debris in its movement path, causing some of the hard debris to enter the waste box 15 inside the rake tooth 5 with the reset movement of the crushing claw 12.

[0049] During this process, the U-shaped guide groove 16 restricts the movement range of the crushing claw 12. When the crushing claw 12 is in the normal material handling state, the guide pin 122 is restricted by the position of the stop groove 162, etc., so that the crushing claw 12 is kept within the corresponding working stroke. When the crushing claw 12 is blocked by hard debris, the guide pin 122 moves along the long guide groove 161 to avoid it, so that the crushing claw 12 can switch between the normal crushing position and the avoidance position.

[0050] It should be noted that in this embodiment, the distinction between pulverizable materials and non-pulverizable debris is not based on the material name, but primarily on the resistance generated by the material on the crushing claw 12 after entering the crushing zone. For materials such as fiber agglomerates and bonded particles that can undergo structural damage under the action of the crushing claw 12 and the limiting plate 10, the crushing claw 12 continues to perform the compression and crushing process. For hard debris such as stones and metal blocks that generate significant resistance during the compression process and are not easily damaged, the crushing claw 12 uses the inclined surface 121 and the U-shaped guide groove 16 to create an avoidance movement, thereby reducing the continuous forced compression.

[0051] As the main drive shaft 32 continues to rotate, the flower-shaped guide disc 8 periodically guides the guide pin 73, causing the movable disc 7 to continuously move back and forth, which in turn drives the connecting disc 71, connecting rod 17, guide pin 92, connecting plate 9, and connecting plate 91 to move accordingly. Therefore, the crushing claw 12 can periodically enter the working position to crush and squeeze the subsequently passing agglomerated material, while avoiding hard impurities. This allows the drying, spreading, agglomerated material crushing, and hard impurity separation processes to occur simultaneously during the continuous operation of the disc dryer.

[0052] During later maintenance, after a certain amount of hard debris accumulates inside the collection cylinder 20, the machine body 1 can be stopped and the rake arm 4 rotated to flip the rake teeth 5 and guide the impurities inside into the collection cylinder 20 through the guide box 14. Then, the locking cover 19 can be opened to remove the collection cylinder 20 for cleaning. After cleaning, the collection cylinder 20 can be reinstalled and the locking cover 19 can be closed to continue solid waste treatment.

[0053] Next, in practical application, the movable disk 7 reciprocates under the periodic guidance of the flower-shaped guide disk 8, and resets itself through the return spring 72. During the displacement of the movable disk 7, the movable disk 7 applies a pushing force to the connecting disk 71 through the limiting post and the return spring 18, causing the connecting disk 71 to move synchronously.

[0054] When the movable disc 7 begins to reset, the second reset spring 18 pulls back the connecting disc 71, causing the connecting disc 71 to reset synchronously with the movable disc 7. However, when the crushing claw 12 is in its normal working position, the third guide pin 122 is limited by the stop groove 162, restricting the reset stroke of the crushing claw 12. At this time, the connecting disc 71 cannot continue to move to the fully reset position, and the second reset spring 18 remains in a certain state of compression or tension deformation. When the crushing claw 12 is blocked by hard debris and moves along the long guide groove 161 to avoid it, the third guide pin 122 disengages from the limiting area of ​​the stop groove 162, and the crushing claw 12 gains further movement space. At this time, the second reset spring 18 can continue to release its remaining elastic potential energy and push the crushing claw 12 further backward through the connecting disc 71 and the corresponding transmission structure, so that the crushing claw 12 obtains a greater backward distance than in the normal working state. This is beneficial for the crushing claw 12 to fully detach from the hard debris and provides sufficient movement stroke for subsequent return to the normal crushing position.

[0055] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A disc dryer for solid waste treatment in environmental protection, comprising a body (1), characterized in that, The upper part of the machine body (1) is provided with a cylinder (2), and the cylinder (2) is provided with a heat exchange tube mechanism (3) and a heat exchange plate mechanism (6). The main drive shaft (32) is rotatably installed inside the machine body (1). Multiple rake arms (4) are installed on the main drive shaft (32), and multiple rake teeth (5) are installed on each rake arm (4) so ​​that the main drive shaft (32) drives the rake arms (4) and rake teeth (5) to turn over, spread and transport the solid waste on the heat exchange plate mechanism (6). The rake arm (4) is provided with a crushing claw mechanism and a limiting plate (10) on one side. A material passage (51) is formed between the crushing claw mechanism and the limiting plate (10). The crushing claw mechanism is used to crush the crushable agglomerates that enter the material passage (51). The end of the crushing claw (12) is provided with an inclined surface (121) for forming a guiding contact with hard debris. A movable disc (7) is slidably installed on one side of the main drive shaft (32). The movable disc (7) forms an elastic reset cooperation with the rake arm (4) through a reset spring (72). A connecting disc (71) is installed on one side of the movable disc (7) for limited rotation. The connecting disc (71) drives the crushing claw mechanism to reciprocate through a linkage mechanism to achieve crushing. The crushing claw mechanism includes a crushing claw (12), a connecting plate one (9), and a connecting plate two (91). The connecting plate two (91) is slidably connected to the rake teeth (5). The connecting plate two (91) is linked with the linkage mechanism. A guide pin three (122) is provided at the upper end of the crushing claw (12). A spiral guide groove (16) is provided on the rake teeth (5) to form a limiting sliding fit with the guide pin three (122). The spiral guide groove (16) includes a long guide groove (161) and a stop groove (162).

2. A disc dryer for solid waste treatment in environmental protection according to claim 1, characterized in that, The bottom of the movable disc (7) is provided with a guide pin (73). The guide pin (73) and the flower-shaped guide disc (8) provided on the heat exchange disc mechanism (6) form a periodic guiding fit so that when the main drive shaft (32) drives the rake arm (4) to rotate, the movable disc (7) moves back and forth along the axial direction of the main drive shaft (32). The movable disc (7) is connected to the connecting disc (71) by multiple limit pins. The limit pins and the connecting disc (71) are connected by a return spring (18).

3. A disc dryer for solid waste treatment in environmental protection according to claim 1, characterized in that, The linkage mechanism includes a connecting rod (17) and a plurality of guide pins (92) mounted on the connecting rod (17). One end of the connecting rod (17) is fixedly mounted on one end of the connecting plate (71). The guide pins (92) and the guide frame (13) on one side of the connecting plate (9) form a limiting sliding connection.

4. A disc dryer for solid waste treatment in environmental protection according to claim 1, characterized in that, The rake arm (4) is hollow inside and has multiple guide boxes (14) connected to one side. One side of the guide box (14) is connected to the rake teeth (5). A waste box (15) is provided in the middle of the rake teeth (5). A collection cylinder (20) is installed inside the rake arm (4). The collection cylinder (20) is pressed by a locking cover (19).

5. A disc dryer for solid waste treatment in environmental protection according to claim 1, characterized in that, A connecting plate 1 (9) is slidably installed on one side of the rake tooth (5). A connecting plate 2 (91) is rotatably connected to one end of the connecting plate 1 (9). A crushing claw (12) is provided on one side of the connecting plate 2 (91). A torsion spring is installed at the rotatable connection between the crushing claw (12) and the connecting plate 2 (91).

6. A disc dryer for solid waste treatment in environmental protection according to claim 5, characterized in that, Multiple guide frames (13) are installed at one end of the connecting plate (9). A guide groove is provided in the middle of the guide frame (13), and a guide pin (92) is slidably installed inside the groove. Each guide pin (92) is rotatably installed in the middle of the connecting rod (17). One end of the connecting rod (17) is connected to the connecting plate (71). When the connecting plate (71) generates axial displacement, the connecting rod (17) moves synchronously and drives each guide pin (92) to form a sliding constraint cooperation with the guide frame (13).

7. A disc dryer for solid waste treatment in environmental protection according to claim 1, characterized in that, The position of the limiting plate (10) can be adjusted by adjusting screw (11) to change the position of the limiting plate (10) relative to the crushing claw (12). The limiting plate (10) is slidably installed in the middle of the rake tooth (5) by a slider, and the adjusting screw (11) is rotatably installed on the side wall of the rake tooth (5) and screwed to the limiting plate (10).

8. A disc dryer for solid waste treatment in environmental protection according to claim 4, characterized in that, The rake arm (4) has a raised strip structure inside and forms a matching fit with the groove opened on the outer wall of the collection cylinder (20) to complete the alignment installation.

9. A disc dryer for solid waste treatment in environmental protection according to claim 1, characterized in that, The guide pin three (122) and the spiral guide groove (16) opened on the top side of the middle part of the rake tooth (5) form a limiting sliding fit. The spiral guide groove (16) includes a spiral groove body, a long guide groove (161) and a stop groove (162). The long guide groove (161) is used to guide the movement direction of the crushing claw (12). The stop groove (162) is recessed a distance behind the spiral groove body to limit the corresponding position of the crushing claw (12).

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