A landfill sludge waste screening device

Abstract

This invention discloses a landfill sludge screening device, relating to the field of sludge technology. It includes a discharge box with four support rods fixedly mounted on its side wall. A collection box is fixedly mounted at the bottom of the four support rods. Two rotating shafts are rotatably mounted in the middle of the collection box, with two sliding blocks fixedly mounted at both ends of one of the shafts. The side wall of the collection box is provided with sliding grooves and sliding elongated grooves. This invention, through the arrangement of a first L-shaped rack, screening gears, and a second L-shaped rack, achieves the simultaneous crushing of sludge and screening of stones, without causing collisions between stones and the crushing mechanism as in traditional crushing mechanisms. This significantly extends the device's service life. The sliding inclined plate prevents stones from re-mixing with the crushed sludge, and the crushed sludge makes subsequent landfilling easier, avoiding the risk of hidden pits at the landfill site.

Description

Technical Field

[0001] This invention relates to the field of sludge and waste technology, specifically to a landfill sludge and waste screening device. Background Technology

[0002] Sludge waste may contain large pieces of debris, such as stones, wood, and metal. If these debris are directly landfilled without treatment, they will cause pollution and harm to the environment. In order to reduce pollution and harm to the environment, sludge waste is usually screened.

[0003] Patent document CN219850679U discloses a landfill sludge screening device, comprising: a screening box with an internal receiving space; a vibration mechanism; and a multi-layer screening mechanism for screening sludge of different particle sizes. The multi-layer screening mechanism is located inside the screening box and is longitudinally distributed. The multi-layer screening mechanism allows for three-layer screening of sludge of different sizes, and the vibration mechanism prevents sludge from accumulating on the screening layers. Furthermore, the design of the first and second propulsion plates allows the sludge to be discharged.

[0004] The aforementioned device uses a multi-layer screening mechanism to screen sludge waste of different sizes in three layers. However, the existing landfill standard for sludge is a solids content of not less than 35%. Sludge contains various hard, lumpy solids such as stones and metals. If these lumpy solids are not removed, they will occupy a large amount of landfill space, resulting in resource waste. Even if screening is performed, some lumpy sludge will still be screened out as stones and metals. Workers will then need to transport these screened lumpy sludge pieces back to the landfill area for re-filling. It is impossible to distinguish between lumpy sludge and stones, increasing the workload and reducing landfill efficiency. Furthermore, the existing technology requires large lumps of sludge to be stirred and crushed into smaller pieces to avoid excessive spacing during sludge landfilling, which could lead to ground subsidence and pit formation. However, during stirring and crushing, the stirring and crushing device impacts the stones, resulting in a shorter lifespan for the stirring device, higher machine maintenance frequency, and relatively higher operating costs. Summary of the Invention

[0005] The present invention addresses the problem that existing technical solutions are too simplistic and provides a solution that is significantly different from existing technologies. Specifically, the purpose of the present invention is to provide a landfill sludge screening device to solve the problems mentioned in the background.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a landfill sludge screening device, comprising a discharge box, four support rods fixedly installed on the side wall of the discharge box, a collection box fixedly installed at the bottom of the four support rods, two rotating shafts rotatably installed in the middle of the collection box, two sliding blocks fixedly installed at both ends of one of the rotating shafts, a sliding groove and a sliding long groove provided on the side wall of the collection box, the two sliding blocks sliding in the two sliding grooves respectively, a screening mechanism provided at the bottom of each of the two sliding blocks, a vibration mechanism provided at the top of each of the two sliding blocks, a crushing assembly provided inside the collection box, the crushing assembly comprising a movable crushing roller and a fixed crushing roller, the fixed crushing roller fixedly installed on one of the rotating shafts, the movable crushing roller fixedly installed on the other rotating shaft, a sliding inclined plate fixedly installed between the two screening mechanisms, the two ends of the sliding inclined plate sliding in the sliding long groove, a buffer mechanism provided at the bottom of one of the screening mechanisms, a return spring provided on the side wall of each of the two sliding blocks, and a rotating motor provided at the end of each of the two rotating shafts.

[0007] Preferably, each of the screening mechanisms includes a first L-shaped rack, a screening gear, and a second L-shaped rack. The second L-shaped rack is fixedly disposed at the bottom of the sliding block, the screening gear is rotatably disposed on the side wall of the collection box, and the first L-shaped rack is slidably disposed at the bottom of the screening gear.

[0008] Preferably, the buffer mechanism includes a one-way valve, several through holes, a piston sleeve, a piston plate, a buffer spring, a mounting plate, and a piston rod. The piston rod is fixedly disposed on the side wall of the first L-shaped rack, the mounting plate is fixedly disposed on the end of the piston rod, the buffer spring is disposed on the mounting plate, the piston plate is fixedly disposed on the end of the buffer spring away from the mounting plate, the piston sleeve is fixedly disposed on the side wall of the collection tank, the one-way valve is disposed on the end of the piston sleeve, and several through holes are disposed on the end of the piston sleeve.

[0009] Preferably, the sliding inclined plate is provided with a plurality of screening grooves.

[0010] Preferably, each of the vibration mechanisms includes a plurality of L-shaped impact rods, a plurality of L-shaped abutment rods, a trapezoidal rod, a mounting rod, a rotating rod, a connecting rod, and a vibration spring. The mounting rod is fixedly mounted on the side wall of the discharge box, the rotating rod is rotatably mounted on the end of the mounting rod, one end of the connecting rod is fixedly mounted on the rotating rod, a plurality of L-shaped impact rods are fixedly mounted on the other end of the connecting rod, a plurality of L-shaped abutment rods are fixedly mounted above the connecting rod, and the buffer spring is located in the middle of the connecting rod.

[0011] Preferably, the end of each L-shaped impact rod is tapered, and the end of each L-shaped impact rod is made of rubber. The end of each L-shaped impact rod is provided with symmetrically arranged bevels.

[0012] Preferably, the trapezoidal rods are respectively engaged with the inclined surfaces at the ends of several L-shaped abutting rods.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] (1) By setting up the first L-shaped rack, the screening gear and the second L-shaped rack, the present invention can screen out stones while crushing mud, and will not cause stones to collide with the crushing mechanism like traditional crushing mechanisms, thus greatly extending the service life of the device. By setting up the sliding inclined plate, the stones are prevented from being mixed with the crushed sludge again, and the crushed sludge blocks make the subsequent sludge landfill work easier, avoiding the danger of hidden pits at the landfill location.

[0015] (2) The present invention, by setting up a vibration mechanism including several L-shaped impact rods, several L-shaped contact rods, trapezoidal rods, mounting rods, rotating rods, connecting rods and vibration springs, realizes automatic vibration of the discharge box without the need for an additional power source, avoids the situation where the subsequent mud blocks accumulate at the discharge port and cannot be continuously discharged when the stones are between the fixed contact roller and the movable contact roller, increases the practicality of the device, and does not require manual operation to clear the blockage;

[0016] (3) By setting up a one-way valve, several through holes, piston sleeve, piston plate, buffer spring, mounting plate and piston rod, the present invention can not affect the moving speed of the movable roller during normal screening, but also buffer the reset speed of the movable roller, avoid impact caused by rapid reset, and reduce the maintenance frequency of the device. Attached Figure Description

[0017] Figure 1 This is a front view of the overall structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the overall structure of the present invention from the rear.

[0019] Figure 3 This is a schematic cross-sectional view of the internal structure of the collection box of the present invention;

[0020] Figure 4 This is a cross-sectional view of the buffer mechanism of the present invention;

[0021] Figure 5 This is a schematic diagram of the front structure of the vibration mechanism of the present invention;

[0022] Figure 6 This is a schematic diagram of the back structure of the vibration mechanism of the present invention.

[0023] In the diagram: 1. Collection box; 2. Crushing assembly; 21. Movable crushing roller; 22. Fixed crushing roller; 3. Support rod; 4. Discharge box; 5. Vibration mechanism; 51. L-shaped impact rod; 52. L-shaped contact rod; 53. Trapezoidal rod; 54. Mounting rod; 55. Rotating rod; 56. Connecting rod; 57. Vibration spring; 6. Buffer mechanism; 61. One-way valve; 62. Through hole; 63. Piston sleeve; 64. Piston plate; 65. Buffer spring; 66. Mounting plate; 67. Piston rod; 7. Screening mechanism; 71. First L-shaped rack; 72. Screening gear; 73. Second L-shaped rack; 9. Rotating motor; 10. Return spring; 11. Sliding groove; 13. Sliding inclined plate; 14. Rotating shaft; 15. Sliding block; 16. Sliding groove. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Please see Figure 1-6An embodiment of the present invention provides a landfill sludge screening device, comprising a discharge box 4, four support rods 3 fixedly mounted on the side wall of the discharge box 4, a collection box 1 fixedly mounted at the bottom of the four support rods 3, two rotating shafts 14 rotatably mounted in the middle of the collection box 1, two sliding blocks 15 fixedly mounted at both ends of one of the rotating shafts 14, sliding grooves 16 and sliding elongated grooves 11 provided on the side wall of the collection box 1, the two sliding blocks 15 sliding within the two sliding grooves 16 respectively, a screening mechanism 7 provided at the bottom of each of the two sliding blocks 15, and a screening mechanism 7 provided at the top of each of the two sliding blocks 15. The system includes a vibration mechanism 5, and a crushing assembly 2 is installed inside the collection box 1. The crushing assembly 2 includes a movable crushing roller 21 and a fixed crushing roller 22. The fixed crushing roller 22 is fixedly mounted on one of the rotating shafts 14, and the movable crushing roller 21 is fixedly mounted on the other rotating shaft 14. A sliding inclined plate 13 is fixedly installed between the two screening mechanisms 7. The two ends of the sliding inclined plate 13 slide within the sliding groove 11. A buffer mechanism 6 is installed at the bottom of one of the screening mechanisms 7. A return spring 10 is installed on the side wall of each of the two sliding blocks 15. A rotating motor 9 is installed at the end of each of the two rotating shafts 14. First, the dewatered sludge is poured into the discharge box 4. The sludge is discharged from the bottom outlet of the discharge box 4 between the movable crushing roller 21 and the fixed crushing roller 22. The output shaft of the rotating motor 9 drives the rotating shaft 14 to rotate, thereby crushing the lumps of sludge. When encountering stones or hard metal blocks, the stones abut against the movable crushing roller 21, causing the sliding block 15 to move towards the return spring 10. This simultaneously drives the screening mechanism 7 to work. The screening mechanism 7 drives the sliding inclined plate 13 to move between the movable crushing roller 21 and the fixed crushing roller 22 to catch the stones. The movement of the sliding block 15 also drives the vibration mechanism 5 to work, vibrating the discharge box 4. After the stones are screened out, the return spring 10 drives the sliding block 15 and the movable crushing roller 21 to return to their original positions. The buffer mechanism 6 slows down the return speed of the movable crushing roller 21, preventing it from rapidly returning to its original position and colliding with the fixed crushing roller 22. This increases the service life of the device and reduces the maintenance frequency.

[0026] Specifically, each screening mechanism 7 includes a first L-shaped rack 71, a screening gear 72, and a second L-shaped rack 73. The second L-shaped rack 73 is fixedly mounted on the bottom of the sliding block 15, the screening gear 72 is rotatably mounted on the side wall of the collection box 1, and the first L-shaped rack 71 is slidably mounted on the bottom of the screening gear 72. The movement of the sliding block 15 drives the second L-shaped rack 73 to move, which in turn drives the screening gear 72 to rotate. The rotation of the screening gear 72 drives the first L-shaped rack 71 to move, and the movement of the first L-shaped rack 71 drives the sliding inclined plate 13 to move synchronously, thereby catching the stones and preventing them from re-mixing with the crushed sludge.

[0027] Specifically, the buffer mechanism 6 includes a one-way valve 61, several through holes 62, a piston sleeve 63, a piston plate 64, a buffer spring 65, a mounting plate 66, and a piston rod 67. The piston rod 67 is fixedly disposed on the side wall of the first L-shaped rack 71. The mounting plate 66 is fixedly disposed on the end of the piston rod 67. The buffer spring 65 is disposed on the mounting plate 66. The piston plate 64 is fixedly disposed on the end of the buffer spring 65 away from the mounting plate 66. The piston sleeve 63 is fixedly disposed on the side wall of the collection box 1. The one-way valve 61 is disposed on the end of the piston sleeve 63. Several through holes 62 are disposed on the end of the piston sleeve 63. When the first L-shaped rack 71 moves toward the piston sleeve 63, the gas flow direction of the one-way valve 61 is consistent with the movement direction of the first L-shaped rack 71. This causes the first L-shaped rack 71 to move, driving the piston rod 67 and the mounting plate 66 to move, thereby squeezing the buffer spring 65. The buffer spring 65 pushes the piston plate 64 with minimal resistance. Conversely, if the one-way valve 61 cannot vent in the reverse direction, air can only enter the piston sleeve 63 through the through hole 62. This results in greater resistance in the reverse movement, thus slowing down the movement speed of the piston rod 67. This buffers the speed at which the movable roller resets, preventing impact caused by rapid reset and reducing the maintenance frequency of the device.

[0028] Specifically, the sliding inclined plate 13 is provided with several screening grooves.

[0029] Specifically, each vibration mechanism 5 includes several L-shaped impact rods 51, several L-shaped contact rods 52, trapezoidal rods 53, mounting rods 54, rotating rods 55, connecting rods 56, and vibration springs 57. The mounting rods 54 are fixedly mounted on the side wall of the discharge box 4. The rotating rods 55 are rotatably mounted on the end of the mounting rods 54. One end of the connecting rods 56 is fixedly mounted on the rotating rods 55. Several L-shaped impact rods 51 are fixedly mounted on the other end of the connecting rods 56. Several L-shaped contact rods 52 are fixedly mounted above the connecting rods 56. The buffer springs 65 are located in the middle of the connecting rods 56. The sliding block 15 moves, driving the trapezoidal rod 53 to move. The trapezoidal rod 53 moves and abuts against the end of the L-shaped abutment rod 52, causing the L-shaped abutment rod 52 to drive the connecting rod 56 to rotate around the rotating rod 55. When the trapezoidal rod 53 continues to move to a position where it no longer abuts against the L-shaped abutment rod 52, the connecting rod 56 is reset by the force of the vibration spring 57, thereby driving the L-shaped impact rod 51 to impact the discharge box 4. This achieves automatic vibration of the discharge box 4 without the need for an additional power source, avoiding the situation where subsequent mud blocks accumulate at the discharge port and cannot be continuously discharged when stones are between the fixed abutment roller and the movable abutment roller, increasing the practicality of the device, and eliminating the need for manual operation to clear blockages.

[0030] Specifically, the end of each L-shaped impact rod 51 is tapered, and the end of each L-shaped impact rod 51 is made of rubber. The end of each L-shaped abutment rod 52 is provided with symmetrically arranged inclined surfaces.

[0031] Specifically, the trapezoidal rod 53 is in contact with the inclined surfaces at the ends of several L-shaped abutting rods 52.

[0032] Working principle: First, the dewatered sludge is poured into the discharge box 4. The sludge is discharged from the bottom outlet of the discharge box 4 between the movable crushing roller 21 and the fixed crushing roller 22. The output shaft of the rotating motor 9 drives the rotating shaft 14 to rotate, thereby crushing the lumps of sludge. When encountering stones or hard metal blocks, the stones abut against the movable crushing roller 21, causing the sliding block 15 to move towards the return spring 10. The movement of the sliding block 15 drives the second L-shaped rack 73 to move. The movement of the second L-shaped rack 73 drives the screening gear 72 to rotate, which in turn drives the first L-shaped rack 71 to move. The movement of the first L-shaped rack 71 then drives the sliding inclined plate 13 to move synchronously, thus catching the stones and preventing them from re-mixing with the crushed sludge. Simultaneously, the movement of the sliding block 15 drives the trapezoidal rod 53 to move. The trapezoidal rod 53 abuts against the end of the L-shaped contact rod 52, causing the L-shaped contact rod 52 to drive the connecting rod 56 to rotate around the rotating rod 55. The trapezoidal rod 53 continues to move... When the connecting rod 56 moves to a position where it is no longer in contact with the L-shaped contact rod 52, it is reset by the force of the vibration spring 57, thereby driving the L-shaped impact rod 51 to impact the discharge box 4 and vibrate the discharge box 4. After the stones are screened out, the reset spring 10 drives the sliding block 15 and the movable crushing roller 21 to reset. When the first L-shaped rack 71 moves towards the piston sleeve 63, the gas flow direction of the one-way valve 61 is consistent with the movement direction of the first L-shaped rack 71, so the movement of the first L-shaped rack 71 drives the piston rod 67 and the mounting plate 66 to move, thereby squeezing the buffer spring 65. The buffer spring 65 pushes the piston plate 64 to move with very little resistance. Conversely, if the one-way valve 61 cannot pass air in the reverse movement, the air can only enter the piston sleeve 63 through the through hole 62, thus making the resistance to the reverse movement greater, thereby slowing down the movement speed of the piston rod 67, thereby buffering the reset speed of the movable crushing roller, avoiding impact caused by rapid reset, and reducing the maintenance frequency of the device.

[0033] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A landfill sludge screening device, comprising a discharge box (4), wherein four support rods (3) are fixedly installed on the side wall of the discharge box (4), characterized in that: A collection box (1) is fixedly installed at the bottom of the four support rods (3). Two rotating shafts (14) are rotatably installed in the middle of the collection box (1). Two sliding blocks (15) are fixedly installed at both ends of one of the rotating shafts (14). The side walls of the collection box (1) are provided with sliding grooves (16) and sliding long grooves (11). The two sliding blocks (15) slide in the two sliding grooves (16) respectively. The bottom of the two sliding blocks (15) is provided with a screening mechanism (7), and the top of the two sliding blocks (15) is provided with a vibration mechanism (5). (1) An internal crushing assembly (2) is provided, which includes a movable crushing roller (21) and a fixed crushing roller (22). The fixed crushing roller (22) is fixedly mounted on one of the rotating shafts (14), and the movable crushing roller (21) is fixedly mounted on the other rotating shaft (14). A sliding inclined plate (13) is fixedly mounted between the two screening mechanisms (7). The two ends of the sliding inclined plate (13) slide within the sliding groove (11). A buffer mechanism (6) is provided at the bottom of one of the screening mechanisms (7). The side walls of the two sliding blocks (15) are both A return spring (10) is provided, and a rotating motor (9) is provided at the ends of both rotating shafts (14). Each screening mechanism (7) includes a first L-shaped rack (71), a screening gear (72), and a second L-shaped rack (73). The second L-shaped rack (73) is fixedly disposed at the bottom of the sliding block (15). The screening gear (72) is rotatably disposed on the side wall of the collection box (1). The first L-shaped rack (71) is slidably disposed at the bottom of the screening gear (72). Each vibration mechanism (5) includes several L-shaped impact rods (51) and several L-shaped abutment rods (52). 52), trapezoidal rod (53), mounting rod (54), rotating rod (55), connecting rod (56) and vibration spring (57), wherein the mounting rod (54) is fixedly installed on the side wall of the discharge box (4), the rotating rod (55) is rotatably installed at the end of the mounting rod (54), one end of the connecting rod (56) is fixedly installed on the rotating rod (55), several L-shaped impact rods (51) are fixedly installed at the other end of the connecting rod (56), several L-shaped abutment rods (52) are fixedly installed above the connecting rod (56), and the vibration spring (57) is installed in the middle of the connecting rod (56).

2. The landfill sludge screening device according to claim 1, characterized in that: The buffer mechanism (6) includes a one-way valve (61), several through holes (62), a piston sleeve (63), a piston plate (64), a buffer spring (65), a mounting plate (66), and a piston rod (67). The piston rod (67) is fixedly disposed on the side wall of the first L-shaped rack (71). The mounting plate (66) is fixedly disposed on the end of the piston rod (67). The buffer spring (65) is disposed on the mounting plate (66). The piston plate (64) is fixedly disposed on the end of the buffer spring (65) away from the mounting plate (66). The piston sleeve (63) is fixedly disposed on the side wall of the collection box (1). The one-way valve (61) is disposed on the end of the piston sleeve (63). Several through holes (62) are disposed on the end of the piston sleeve (63).

3. The landfill sludge screening device according to claim 1, characterized in that: The sliding inclined plate (13) is provided with several screening grooves.

4. The landfill sludge screening device according to claim 1, characterized in that: Each of the L-shaped impact rods (51) has a tapered end, and each of the L-shaped impact rods (51) has a rubber end. Each of the L-shaped abutment rods (52) has a symmetrically arranged inclined surface at its end.

5. A landfill sludge screening device according to claim 4, characterized in that: The trapezoidal rod (53) engages with the inclined surfaces at the ends of several L-shaped abutting rods (52).

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