A waste screening mechanism

Abstract

This utility model relates to the field of waste recycling technology, and in particular to a waste screening mechanism. The utility model includes a base, a housing fixed to the base and vertically arranged along its height, a detachable cover on top of the housing, a feed inlet on the cover, a dewatering screening assembly located inside the housing for separating moisture and fine particles from the waste, a collection assembly located inside the housing for collecting the screened moisture and fine particles, and a discharge outlet located at the lower end of the housing. The purpose of this device is to separate fine particles from the waste as much as possible during the dewatering process.

Description

Technical Field

[0001] This utility model relates to the field of waste recycling technology, and in particular to a waste screening mechanism. Background Technology

[0002] In the process of waste sorting, in order to separate different types of waste, the waste is often first soaked in water. Due to the difference in buoyancy between substances of different densities, floating materials such as plastics and cotton fibers are removed. Then, the sand, gravel, and non-ferrous metals that sink to the bottom are dehydrated before proceeding to the next step of separation and recycling. However, the following problems exist in the dehydration process of the soaked sand and gravel and non-ferrous metals:

[0003] 1. In existing centrifugal dewatering machines, waste is fed into the rotating drum through a hollow shaft. Under the centrifugal force generated by the high-speed rotation, it is immediately thrown into the drum cavity. Due to its higher density and centrifugal force, the waste particles adhere to the inner wall of the drum, forming a solid ring layer. Water, due to its lower density and lower centrifugal force, forms a liquid ring layer inside the solid ring layer. The waste in the solid ring layer is slowly propelled by a screw conveyor to the conical end of the drum and continuously discharged through outlets around the drum. The liquid in the liquid ring layer continuously overflows from the weir to the outside of the drum, forming a separated liquid. This liquid then collects and is discharged from the dewatering machine by gravity. During this process, because fine materials, although small in volume, have a high density and cannot be discharged with the liquid, fine sand is discharged along with large particles of stone and metal, failing to achieve the effect of separating fine and large materials during dewatering.

[0004] 2. Because existing dewatering machines often use centrifugal principle for dewatering, the sand and gravel are thrown onto the inner wall of the dewatering machine. During the dewatering rotation, the sand and gravel are moved to adhere to the inner wall, causing direct contact and friction between the sand and gravel and the inner wall of the dewatering machine. This makes the inner wall of the dewatering machine easily worn by the friction of the sand and gravel, which seriously affects the service life of the inner cylinder of the dewatering machine. Utility Model Content

[0005] In order to solve the above problems, the purpose of this utility model is to provide a waste screening mechanism, which aims to screen and separate fine materials in waste as much as possible during the dewatering process.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A waste screening mechanism includes a base, a housing fixed on the base and vertically arranged along the height direction, a cover detachably installed on the top of the housing, a feed inlet on the cover, a dewatering screening component installed inside the housing for screening and separating moisture and fine materials in the waste, a collection component installed inside the housing for collecting the screened moisture and fine materials, and a discharge port installed at the bottom of the housing.

[0008] The dewatering screening assembly includes a housing fixed in the middle of the machine casing, a rotating shaft rotatably disposed in the housing and coaxially arranged with the feed inlet and extending above the housing, a differential sleeve rotatably sleeved on the upper part of the rotating shaft, several extension rods fixed on the upper part of the outer wall of the differential sleeve, a mounting ring sleeved on the differential sleeve and fixedly connected to the inner wall of each extension rod away from the differential sleeve, a screen detachably disposed on the mounting ring, a scraper end fixed on the upper part of the rotating shaft, several scraper blades fixed on the side wall of the scraper end, and a drive sub-assembly disposed in the housing for causing the rotating shaft and the differential sleeve to rotate at different speeds.

[0009] More preferably, the drive sub-assembly includes a first differential gear fixed on the lower outer wall of the rotating shaft, a second differential gear fixed on the lower outer wall of the differential sleeve, a mounting groove on the lower side of the mounting housing, a drive shaft rotatably disposed within the mounting housing and with its lower end extending into the mounting groove, a first drive gear fixed on the drive shaft and meshing with the first differential gear, a second drive gear fixed on the drive shaft and meshing with the second differential gear, a drive pulley disposed in the mounting groove and fixedly connected to the lower end of the drive shaft, and a drive motor fixed on the base and connected to the output shaft and the drive pulley by a belt.

[0010] More preferably, the collection assembly includes a material collection ring groove that surrounds the outer wall of the mounting ring and is fixedly connected to the inner wall of the housing, and a pair of drainage holes that are respectively provided on opposite sides of the inner wall of the mounting ring on one side of the material collection ring groove and penetrate the housing.

[0011] More preferably, the cover and the housing are detachably connected by fastening screws, and the screen and the mounting ring are detachably connected by fastening screws.

[0012] This utility model has the following beneficial effects:

[0013] 1. This utility model uses a dewatering screening component to make the garbage undergo centrifugal motion inside the screen under the action of the scraper blades, and throws larger garbage such as sand and gravel onto the inner wall of the screen, while fine sand and water are thrown out from the screen holes, thereby achieving the effect of screening fine materials and large materials during the dewatering process.

[0014] 2. In the process of screening fine materials, the rotating scraper blades drive the sand and gravel to make centrifugal motion within the screen. Under the action of the drive component, the relative rotation speed between the screen and the scraper blades is reduced, thereby regulating and reducing the relative motion speed between the sand and gravel and the screen, thus reducing the wear of the sand and gravel on the screen surface.

[0015] 3. This utility model ensures that the screen and the scraper blade do not rotate at the same speed through the drive component, thereby ensuring that the scraper blade drives the sand and gravel to move in contact with the screen surface. This causes the screen to push the fine material stuck to the screen surface into the screen holes. As the sand and gravel pass through the screen holes, they impact the fine material accumulated in the screen holes, thereby pushing the fine material that is clogging the screen holes out of the screen, achieving the effect of preventing clogging and improving the screening effect of fine material. Attached Figure Description

[0016] Figure 1 This is an overall exploded view of the present invention;

[0017] Figure 2 This is an overall axonometric view of the present invention;

[0018] Figure 3 This is an overall sectional view of the present invention.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Base; 2. Casing; 3. Cover; 4. Feed inlet; 5. Dewatering and screening assembly; 51. Housing; 52. Rotating shaft; 53. Differential sleeve; 54. Extension rod; 55. Mounting ring; 56. Screen; 57. Scraper end; 58. Scraper blade; 59. Drive sub-assembly; 591. First differential gear; 592. Second differential gear; 593. Mounting groove; 594. Drive shaft; 595. First drive gear; 596. Second drive gear; 597. Drive pulley; 598. Drive motor; 6. Collection assembly; 61. Collection ring groove; 62. Drain hole; 7. Discharge port; 8. Fastening screws. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] like Figure 1 , Figure 2 and Figure 3 As shown, a waste screening mechanism in this embodiment includes a base 1, a housing 2 fixed on the base 1 and vertically arranged along the height direction, a cover 3 detachably covered above the housing 2, a feed inlet 4 on the cover 3, a dewatering screening component 5 disposed inside the housing 2 for screening and separating moisture and fine materials in the waste, a collection component 6 disposed inside the housing 2 for collecting the screened moisture and fine materials, and a discharge port 7 disposed at the lower end of the housing 2.

[0023] The dewatering screening assembly 5 includes a housing 51 fixed in the middle of the housing 2, a rotating shaft 52 rotatably disposed in the housing 51 and coaxially arranged with the feed inlet 4 and extending above the housing 51, a differential sleeve 53 rotatably sleeved on the upper part of the rotating shaft 52, several extension rods 54 fixed on the upper part of the outer wall of the differential sleeve 53, a mounting ring 55 sleeved on the differential sleeve 53 and fixedly connected to the inner wall of each extension rod 54 away from the differential sleeve 53, a screen 56 detachably disposed on the mounting ring 55, a scraper end 57 fixed on the upper part of the rotating shaft 52, several scraper blades 58 fixed on the side wall of the scraper end 57, and a drive sub-assembly 59 disposed in the housing 51 for causing the rotating shaft 52 and the differential sleeve 53 to rotate at different speeds.

[0024] When using this product, the waste that needs to be dehydrated is poured into the screen 56 through the feed port 4. Under the rotational thrust of the scraper blades 58, the waste undergoes centrifugal rotation within the screen 56, causing it to be thrown against the inner wall of the screen 56, whereupon the water and fine particles in the waste are ejected through the screen holes of the screen 56.

[0025] like Figure 1 and Figure 3 As shown, the drive sub-assembly 59 includes a first differential gear 591 fixed on the lower outer wall of the rotating shaft 52, a second differential gear 592 fixed on the lower outer wall of the differential sleeve 53, a mounting groove 593 located on the lower side of the mounting housing 51, a drive shaft 594 rotatably disposed within the mounting housing 51 with its lower end extending into the mounting groove 593, a first drive gear 595 fixed on the drive shaft 594 and meshing with the first differential gear 591, a second drive gear 596 fixed on the drive shaft 594 and meshing with the second differential gear 592, a drive pulley 597 located within the mounting groove 593 and fixedly connected to the lower end of the drive shaft 594, and a drive motor 598 fixed on the base 1 with its output shaft connected to the drive pulley 597 via a belt.

[0026] When this product is in use, the drive motor 598 is started, and the rotational power of the output shaft of the drive motor 598 is transmitted to the drive pulley 597 via a belt. This causes the drive pulley 597 to drive the drive shaft 594 to rotate, resulting in the first drive gear 595 and the second drive gear 596 on the drive shaft 594 rotating synchronously. This, in turn, drives the first differential gear 591 and the second differential gear 592, which mesh with the drive shaft 594, to rotate synchronously. Due to the different number of teeth, the first differential gear 591 and the second differential gear 592 rotate at different speeds, causing the differential sleeve 53 and the rotating shaft 52 to rotate differentially. Shaft 52 rotates at high speed, while differential sleeve 53 rotates at low speed. When the sand and gravel rotate centrifugally inside the screen 6, the rotation speed of the sand and gravel inside the screen 56 is faster than the rotation speed of the screen 56 due to the influence of the rotation speed of the scraper blade 58. Thus, the scraper blade 58 has the effect of driving the sand and gravel to adhere to the screen surface of the screen 56, causing the sand and gravel to adhere to the screen surface of the screen 56. This drives the fine material adhering to the screen surface of the screen 56 to move along the screen surface and enter the screen holes of the screen 56. At the same time, when the sand and gravel move to the position of the screen holes of the screen 56, the sand and gravel form a pushing force on the fine material accumulated in the screen holes, causing the fine material in the screen holes to be pushed out of the screen 56, preventing the screen holes from being blocked.

[0027] like Figure 1 , Figure 2 and Figure 3 As shown, the collecting component 6 includes a material collecting ring groove 61 that surrounds the outer wall of the mounting ring 55 and is fixedly connected to the inner wall of the housing 2, and a pair of drainage holes 62 that are respectively provided on opposite sides of the inner wall of the mounting ring 55 on one side of the material collecting ring groove 61 and penetrate the housing 2.

[0028] When this product is in use, the water and fine materials thrown out from the screen 56 are thrown onto the inner wall of the shell cover 3 and slide down into the collection ring groove 61 under their own gravity, and are discharged in a concentrated manner through the drain hole 62.

[0029] like Figure 1 and Figure 3 As shown, the cover 3 and the housing 2 are detachably connected by fastening screws 8, and the screen 56 and the mounting ring 55 are detachably connected by fastening screws 8.

[0030] When using this product, the screen 56 is inevitably worn by sand and gravel. The operator can disassemble and replace the screen 56 by tightening the screws 8.

[0031] The working principle of this device is as follows:

[0032] Step 1: Start the drive motor 598. The rotational power of the output shaft of the drive motor 598 is transmitted to the drive pulley 597 through the belt. The drive pulley 597 drives the drive shaft 594 to rotate, causing the first drive gear 595 and the second drive gear 596 on the drive shaft 594 to rotate synchronously with the drive shaft 594. This drives the first differential gear 591 and the second differential gear 592 that mesh with it to rotate synchronously. Due to the difference in the number of teeth, the first differential gear 591 and the second differential gear 592 rotate at different speeds, causing the differential sleeve 53 and the rotating shaft 52 to rotate at different speeds. This causes the rotating shaft 52 to rotate at high speed and the differential sleeve 53 to rotate at low speed.

[0033] Step 2: Pour the waste that needs to be dehydrated into the screen 56 through the feed port 4. Under the rotational thrust of the scraper blades 58, the waste will undergo centrifugal rotation within the screen 56, causing it to be thrown against the inner wall of the screen 56. This will cause the water and fine particles in the waste to be thrown out through the screen holes of the screen 56. Some of the fine particles, due to their stickiness, will accumulate in the screen holes or remain on the inner wall of the screen 56.

[0034] Step 3: When the sand and gravel rotate centrifugally inside the screen 6, the rotation speed of the sand and gravel inside the screen 56 is faster than the rotation speed of the screen 56 due to the influence of the rotation speed of the scraper blade 58. Thus, the scraper blade 58 has the effect of driving the sand and gravel to adhere to the screen surface of the screen 56, causing the sand and gravel to adhere to the screen surface of the screen 56. This causes the fine material adhering to the screen surface of the screen 56 to move along the screen surface and enter the screen holes of the screen 56. At the same time, when the sand and gravel move to the position of the screen holes of the screen 56, the sand and gravel form a pushing force on the fine material accumulated in the screen holes, causing the fine material in the screen holes to be pushed out of the screen 56, preventing the screen holes from being blocked.

[0035] Step 4: The water and fine materials thrown out from the screen 56 are thrown onto the inner wall of the shell cover 3 and slide down into the collection ring groove 61 under their own gravity, and are discharged in a concentrated manner through the drainage hole 62. Large-diameter sand and gravel and non-ferrous metals in the waste fall from the lower opening of the screen 56 and fall out from the discharge port 7.

[0036] The above description is only a specific embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural transformations made based on the contents of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A waste screening mechanism, characterized in that: Includes a base (1), a housing (2) fixed on the base (1) and vertically arranged along the height direction, a detachable cover (3) covering the top of the housing (2), a feed inlet (4) on the cover (3), a dewatering screening assembly (5) located inside the housing (2) for screening and separating moisture and fine materials in the waste, a collection assembly (6) located inside the housing (2) for collecting the screened moisture and fine materials, and a discharge port (7) located at the lower end of the housing (2); The dewatering screening assembly (5) includes a housing (51) fixed in the middle of the housing (2), a rotating shaft (52) rotatably disposed in the housing (51) and coaxially arranged with the feed inlet (4) and extending above the housing (51), a differential sleeve (53) rotatably sleeved on the upper part of the rotating shaft (52), several extension rods (54) fixed on the upper part of the outer wall of the differential sleeve (53), and extension rods (54) sleeved on the differential sleeve (53) with their inner walls aligned with the upper part of the differential sleeve (53). An extension rod (54) is fixedly connected to a mounting ring (55) at the end away from the differential sleeve (53), a screen (56) detachably mounted on the mounting ring (55), a scraper end (57) fixed to the upper end of the rotating shaft (52), several scraper blades (58) fixed to the side wall of the scraper end (57), and a drive sub-assembly (59) located in the housing (51) for causing the rotating shaft (52) and the differential sleeve (53) to rotate at different speeds.

2. The waste screening mechanism according to claim 1, characterized in that: The drive sub-assembly (59) includes a first differential gear (591) fixed on the lower outer wall of the rotating shaft (52), a second differential gear (592) fixed on the lower outer wall of the differential sleeve (53), a mounting groove (593) located on the lower side of the mounting housing (51), a drive shaft (594) rotatably located in the mounting housing (51) and with its lower end extending into the mounting groove (593), a first drive gear (595) fixed on the drive shaft (594) and meshing with the first differential gear (591), a second drive gear (596) fixed on the drive shaft (594) and meshing with the second differential gear (592), a drive pulley (597) located in the mounting groove (593) and fixedly connected to the lower end of the drive shaft (594), and a drive motor (598) fixed on the base (1) and connected to the output shaft and the drive pulley (597) by a belt.

3. The waste screening mechanism according to claim 2, characterized in that: The collecting component (6) includes a collecting ring groove (61) that surrounds the outer wall of the mounting ring (55) and is fixedly connected to the inner wall of the housing (2), and a pair of drain holes (62) that are respectively located on opposite sides of the inner wall of the collecting ring groove (61) on one side of the mounting ring (55) and penetrate the housing (2).

4. The waste screening mechanism according to claim 3, characterized in that: The cover (3) and the housing (2) are detachably connected by fastening screws (8), and the screen (56) and the mounting ring (55) are detachably connected by fastening screws (8).

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