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CN-122010382-A - Negative pressure mud exhauster device

CN122010382ACN 122010382 ACN122010382 ACN 122010382ACN-122010382-A

Abstract

The invention relates to the field of sludge treatment, in particular to a negative pressure sludge discharger device which comprises a bottom plate, semicircular covers, a filter pressing mechanism, a discharging mechanism, a cutting mechanism, an overflow mechanism, a hydraulic pump and a conveying belt mechanism, wherein the semicircular covers are symmetrically arranged at the top of the bottom plate and are connected through hinges, and one semicircular cover is respectively connected with the bottom plate and the filter pressing mechanism. According to the invention, the step precipitation and automatic scraping and cleaning of fine particles in filtrate are realized through the V-shaped groove on the overflow plate, the negative pressure formed by the rapid rising of the pressure filter block is utilized to prevent the filter cloth, and the leakage prevention plate is used for sealing leakage and the inclined plane of the cutting plate and the cutting groove are used for realizing uniform discharging when mud cakes are discharged, so that the technical problems of easy blockage of the filter cloth, easy blockage of a filter screen, sealing failure caused by discharging residues and frequent maintenance of the conventional equipment are effectively solved, and the continuity and the dewatering efficiency of the device are improved.

Inventors

  • Cai Honglu
  • MENG JUAN

Assignees

  • 山东宏科水电设备有限公司

Dates

Publication Date
20260512
Application Date
20260319

Claims (7)

  1. 1. The negative pressure sludge discharger device comprises a bottom plate (9), semicircular covers (8), a filter pressing mechanism (1), a discharging mechanism (2), a cutting mechanism (4), an overflow mechanism (5), a hydraulic pump (6) and a conveying belt mechanism (7), and is characterized in that the semicircular covers (8) are symmetrically arranged at the top of the bottom plate (9), the two semicircular covers (8) are connected through hinges, and one semicircular cover (8) is respectively connected with the bottom plate (9) and the filter pressing mechanism (1); The filter pressing mechanism (1) comprises a storage hopper (11), a first hydraulic cylinder (12), a filter pressing block (13), a filter pressing pipe (14), a filter cloth (15), a filter plate (16), a support column (17) and a support ring plate (18), wherein an inner ring of the support ring plate (18) is connected with the upper end of the storage hopper (11), the lower end of the storage hopper (11) is communicated with the filter pressing pipe (14), the first hydraulic cylinder (12) is arranged at the upper end of the filter pressing pipe (14), the first hydraulic cylinder (12) is connected with the support ring plate (18), the output end of the first hydraulic cylinder (12) is connected with the filter pressing block (13), the lower end of the filter pressing block (13) is provided with the filter plate (16), the upper end and the lower end of the filter plate (16) are respectively connected with the filter cloth (15) and the support column (17), the support column (17) is connected with a bottom plate (9), the lower end of the filter pressing pipe (14) is connected with the discharge mechanism (2) in a sliding manner, and the outer ring of the support column (17) is provided with an overflow mechanism (5). The overflow mechanism (5) comprises an overflow plate (51), a V-shaped groove (511), a scraping block (52) and an arc-shaped piston telescopic rod (53), wherein the overflow plate (51) is connected with a supporting column (17), the overflow plate (51) is conical, and the V-shaped groove (511) is formed in the conical surface of the overflow plate (51).
  2. 2. The negative pressure sludge discharging device according to claim 1, wherein the V-shaped groove (511) is in sliding connection with symmetrically arranged scraping blocks (52), the scraping blocks (52) are connected with the output ends of arc-shaped piston telescopic rods (53), the arc-shaped piston telescopic rods (53) are connected with the cutting mechanism (4), and the bottoms of the scraping blocks (52) are connected with the blocking mechanism (54).
  3. 3. The negative pressure sludge discharging device as claimed in claim 2, wherein the blocking mechanism (54) comprises a connecting rod (541), a first push rod (542), a second push rod (543), a pressing plate (544), a telescopic elastic member (545) and a supporting plate (546), the end of the connecting rod (541) is connected with the bottom of the scraping block (52), the two ends of the connecting rod (541) are respectively connected with the first push rod (542) and the second push rod (543), the end of the first push rod (542) and the end of the second push rod (543) are in transmission contact with the pressing plate (544), the bottom of the pressing plate (544) is connected with one end of the telescopic elastic member (545), the other end of the telescopic elastic member (545) is connected with the supporting plate (546), the supporting plate (546) is connected with the bottoms of the two ends of the overflow plate (51), the top of the pressing plate (544) is connected with symmetrically arranged cylinders (549), the tops of the cylinders (549) are connected with the drainage grooves (547), the grooves of the drainage grooves (547) are provided with the first push rods (542) and the second push rods (541) are staggered.
  4. 4. The negative pressure sludge discharging device as claimed in claim 1, wherein the discharging mechanism (2) comprises a second hydraulic cylinder (21), a blocking ring plate (22), a third hydraulic cylinder (23), a pushing plate (24) and a leakage-proof plate (25) which are symmetrically arranged, the second hydraulic cylinder (21) is connected with the inner wall of the supporting ring plate (18), the output end of the second hydraulic cylinder (21) is connected with one blocking ring plate (22), the blocking ring plate (22) is slidably connected with the filter pressing tube (14), the pushing plate (24) is arranged on the outer wall of the blocking ring plate (22), two ends of the pushing plate (24) are connected with one end of the leakage-proof plate (25) which is symmetrically and horizontally arranged, two leakage-proof plates (25) are connected through a supporting rod, the outer wall of the pushing plate (24) is connected with the output end of the second hydraulic cylinder (21), and the second hydraulic cylinder (21) is connected with one semicircular cover (8).
  5. 5. The negative pressure sludge discharging device as claimed in claim 1, wherein the cutting mechanism (4) comprises a fourth hydraulic cylinder (41), a mud pressing plate (42), a cutting plate (43), an inclined surface (431) and a cutting groove (432), the fourth hydraulic cylinder (41) is mounted on the inner wall of the supporting ring plate (18), the output end of the fourth hydraulic cylinder (41) is connected with the mud pressing plate (42), the lower end of the mud pressing plate (42) is provided with the cutting plate (43), and the cutting plate (43) is connected with the filter plate (16).
  6. 6. The negative pressure sludge discharge apparatus as claimed in claim 5, wherein the lower end of the cutting plate (43) is provided with a slope (431), and the slope (431) is provided with a plurality of strip-shaped cutting grooves (432) at equal intervals.
  7. 7. The negative pressure sludge discharging device according to claim 1, wherein a water baffle plate (512) is fixedly connected to the middle position of the top of the overflow plate (51), the overflow plate (51) on the outer side of the water baffle plate (512) is provided with a hollowed rectangular groove, and the lower end of the rectangular groove is provided with a conveying belt mechanism (7).

Description

Negative pressure mud exhauster device Technical Field The invention relates to the technical field of sludge treatment, in particular to a negative pressure sludge discharge device. Background Sludge drying treatment is an important link in environmental protection engineering, and the core aim is to reduce the water content of sludge so as to facilitate subsequent treatment or resource utilization. In the existing mechanical filtering equipment, in order to improve the dehydration efficiency, a double-acting equipment combining positive pressure filtration and negative pressure suction is developed. For example, patent document CN118978310B proposes a sludge drying treatment device based on negative pressure drainage and dehumidification, which drives a sealing disc and a piston disc to move synchronously through a rotating rod, applies pressure above a screen plate and forms negative pressure below the screen plate so as to realize bidirectional dehydration of sludge, and controls a push plate to automatically open a discharge groove after dehydration is completed through the cooperation of a guide groove and a limiting block, so that dried sludge cakes are pushed out. After the dehydration is completed, the mud cake on the sieve plate is pushed out of the discharge groove through the push plate. However, in the resetting process of the push plate, tiny fit gaps exist between the edges of the push plate and the inner wall of the processing pipe and the surface of the screen plate, for the sludge with higher viscosity, a small amount of sludge is easy to squeeze into the gaps during sludge discharge, or hanging residues are formed at the discharge notch, when the push plate is retracted from two sides to the middle, the residual sludge possibly falls onto the surface or the back of a sliding rail of the push plate, the sludge is gradually accumulated and dried along with the increase of the circulation times to form hard sludge scale, so that the push plate cannot be completely reset to an initial closed position, once the push plate cannot be closed, the plugging ring of the discharge groove cannot form effective sealing, the sludge leaks from the discharge groove during the next filter pressing circulation, equipment is required to be stopped for cleaning, and the continuous operation efficiency is affected. In addition, the existing equipment comprising the equipment lacks an effective step precipitation and self-cleaning mechanism, when filtrate containing fine particles is processed, the fine particles are easy to directly impact a filtering element at the tail end along with water flow, so that a filter screen is frequently blocked, repeated shutdown, disassembly and cleaning are required, and the maintenance burden and the operation cost of the equipment are further increased. Disclosure of Invention In order to solve the technical problems, the technical scheme of the invention is that the negative pressure sludge discharger comprises a bottom plate, semicircular covers, a filter pressing mechanism, a discharge mechanism, a cutting mechanism, an overflow mechanism, a hydraulic pump and a conveying belt mechanism, wherein the semicircular covers are symmetrically arranged at the top of the bottom plate and are connected through hinges, and one semicircular cover is respectively connected with the bottom plate and the filter pressing mechanism; The filter pressing mechanism comprises a storage hopper, a first hydraulic cylinder, a filter pressing block, a filter pressing pipe, filter cloth, a filter plate, a support column and a support ring plate, wherein the inner ring of the support ring plate is connected with the upper end of the storage hopper, the lower end of the storage hopper is communicated with the filter pressing pipe, the first hydraulic cylinder is arranged at the upper end of the filter pressing pipe and is connected with the support ring plate, the output end of the first hydraulic cylinder is connected with the filter pressing block, the lower end of the filter pressing block is provided with the filter plate, the upper end and the lower end of the filter plate are respectively connected with the filter cloth and the support column, the support column is connected with a bottom plate, the lower end of the filter pressing pipe is in sliding connection with the discharge mechanism, and the outer ring of the support column is provided with an overflow mechanism; The overflow mechanism comprises an overflow plate, a V-shaped groove, a scraping block and an arc-shaped piston telescopic rod, wherein the overflow plate is connected with the support column and is conical, and the V-shaped groove is formed in the conical surface of the overflow plate. Further, the V-shaped groove is in sliding connection with symmetrically arranged scraping blocks, the scraping blocks are connected with the output ends of the arc-shaped piston telescopic rods, the arc-shaped piston telescopic rods are conne