Sludge dredging and scraping machine for secondary sedimentation tank of sewage plant

Abstract

The invention relates to the technical field of sewage treatment, in particular to a sewage plant secondary sedimentation tank sludge desilting sludge scraper which comprises a main beam and a branch beam, the branch beam is fixedly connected with the main beam through supporting rods fixedly installed at the two ends of the top face, a first air cylinder is arranged in the center of the inner wall of the bottom of the main beam, and the tail end of a telescopic rod of the first air cylinder is rotationally connected with an auxiliary rotating tooth roller; a first motor is arranged at the position, close to the first air cylinder, of the bottom face of the main beam, an output shaft of the first motor penetrates through the supporting beam and is fixedly provided with a main rotating fluted disc, and the main rotating fluted disc is in meshing transmission with the auxiliary rotating tooth roller; through a three-stage operation mode of bottom scraping, side scraping and re-scraping, equipment is forced to go deep into a sludge layer, conventional and stubborn sludge at the bottom, the wall and other corners of the tank is effectively removed, the desilting efficiency and cleanliness of the secondary sedimentation tank are remarkably improved, meanwhile, sludge dewatering and sewage recycling are synchronously realized by virtue of a screen plate filtering and negative pressure suction technology, and the sludge treatment efficiency is improved. The sludge treatment effect is further optimized.

Description

TECHNICAL FIELD

[0001] The application relates to the sewage treatment technical field, in particular to a sludge dredging and scraping machine for a secondary sedimentation tank of a sewage plant. BACKGROUND

[0002] In a sewage treatment process, the secondary sedimentation tank is one of the core structures of the activated sludge method, and mainly functions to realize the separation of sludge and treated water through gravity settling, so that the sludge deposited in the secondary sedimentation tank can be treated in time.

[0003] According to the patent No. CN219744023U, a sludge scraper for a sedimentation tank is disclosed, which can be flexibly adjusted according to the height of the sedimentation tank by setting a lengthened scraper, and can clean the sludge on the side wall and the bottom wall of the sedimentation tank under the action of a driving mechanism. Although the above-mentioned device can realize the cleaning of the side wall and the bottom wall of the sedimentation tank, its use effect still has the following defects: Firstly, although the length of the scraper is adjustable, the scraping structure is fixed, and only through simple rotation scraping, it is difficult to effectively remove stubborn sludge at the bottom wall and the side wall of the tank, which easily causes incomplete dredging of the tank wall; Secondly, a small amount of sludge is easily attached to the surface of the scraper during long-time scraping, which will affect the use effect of the scraper after the sludge is dried, and cause the loss of sludge; In addition, during the sludge pushing process, a small amount of water contained in the sludge is easily pushed away with the sludge, which leads to the unqualified water quality after treatment, increases the difficulty of subsequent treatment, and further reduces the sludge treatment effect. SUMMARY

[0004] The purpose of the present application is to force the equipment to penetrate into the sludge layer through the three-level operation modes of bottom scraping, side scraping and re-scraping, effectively remove the conventional and stubborn sludge in the corners such as the bottom and the wall of the tank, significantly improve the dredging efficiency and cleanliness of the secondary sedimentation tank, and simultaneously realize sludge dewatering and sewage recovery by means of the mesh plate filtration and negative pressure suction technology, further optimize the sludge treatment effect.

[0005] The purpose of the present application can be realized by the following technical scheme: a sludge dredging and scraping machine for a secondary sedimentation tank of a sewage plant, comprising a main beam and a support beam, the support beam is fixedly connected with the main beam through support rods fixedly installed at both ends of the top surface, a gas cylinder one is arranged at the center of the inner wall of the bottom of the main beam, and an auxiliary gear roller is rotatably connected to the end of the telescopic rod of the gas cylinder one, and a positioning cylinder is fixedly installed at the bottom of the auxiliary gear roller; A motor one is arranged adjacent to the gas cylinder one on the bottom surface of the main beam, and a main gear disc is fixedly installed on the output shaft of the motor one penetrating through the support beam, the main gear disc is in meshing transmission with the auxiliary gear roller, and a bottom wall dredging module, a re-scraping assembly and a side wall dredging module are annularly distributed on the outer wall of the bottom end of the positioning cylinder; The bottom wall dredging module comprises a horizontal frame one fixedly installed at the outer wall of one side of the positioning cylinder, a mud scraping vertical plate vertically and penetratingly arranged inside the horizontal frame one, and a sliding groove and a mesh plate respectively embedded at the upper and lower ends of the horizontal frame one.

[0006] Further, a motor two is arranged at the center of the top end of the horizontal frame one through a machine base, a rotating disc is fixedly installed at the front end output shaft of the motor two, a circular shaft is fixedly installed at the center of the front end surface of the rotating disc, and the circular shaft is in sliding cooperation with the sliding groove.

[0007] Further, a mounting plate is fixedly installed at the top of the mud scraping vertical plate, the rear end plate body of the mounting plate extends to the outside of the horizontal frame one, a plurality of groups of water suction pipes in inverted T-shaped structure are fixedly installed at the bottom of the mounting plate away from the rear end of the horizontal frame one, a water suction pump is arranged between the top of the water suction pipe and the mounting plate, and the pipe body at the bottom of the water suction pipe is provided in a mesh surface.

[0008] Further, the re-scraping assembly comprises a sliding frame fixedly installed at the rear end of the positioning cylinder, a motor three is fixedly installed at the rear end inner wall of the sliding frame, a spiral rotating rod is fixedly installed at the front end output shaft of the motor three, a spiral sleeve frame is sleeved on the outside of the spiral rotating rod, and an inverted T-shaped scraping piece is movably arranged at the bottom of the spiral sleeve frame.

[0009] Further, a corrugated groove is arranged at the bottom surface of the sliding frame, the inverted T-shaped scraping piece is in sliding cooperation with the inner groove arranged at the bottom of the spiral sleeve frame, and the bottom end of the inverted T-shaped scraping piece penetrates through the corrugated groove and extends to the outside of the sliding frame.

[0010] Further, the side wall dredging module comprises a horizontal frame two fixedly installed at the outer wall of the other side of the positioning cylinder, the horizontal frame two is arranged in a left-right staggered manner with the horizontal frame one, a clamping groove is arranged at the end of the horizontal frame two away from the positioning cylinder, an inverted concave structure limiting frame one and a limiting frame two are fixedly installed inside the clamping groove, and a gear groove group is arranged at the top end rear end inner wall of the limiting frame two.

[0011] Further, a gas cylinder two is arranged at the top end inner wall of the limiting frame one, a sleeve is fixedly connected at the end of the telescopic rod of the gas cylinder two, a horizontal rod is transversely and penetratingly arranged inside the sleeve, a long toothed roller is sleeved at one end of the horizontal rod extending to the inside of the limiting frame two, and the long toothed roller is in sliding cooperation with the long groove arranged at the corresponding position of the outer wall of the horizontal rod through the fixed connection of the sliding strip and the inner wall of the long toothed roller.

[0012] Further, a spring damping shock-absorbing ring is fixedly installed between one end of the horizontal rod and the inner wall of the corresponding long toothed roller, a mud scraping horizontal plate is fixedly installed at one end of the long toothed roller extending to the outside of the limiting frame, and a curved surface structure matched with the pool wall is arranged at one side of the mud scraping horizontal plate.

[0013] Compared with the prior art, the beneficial effects of the present application are: The present application is through the cooperation of the bottom wall dredging module, the double scraping assembly and the side wall dredging module, realizes the comprehensive cleaning of the secondary sedimentation tank sludge, effectively improves the dredging efficiency and dredging quality; The bottom wall dredging module is matched with the mud scraping vertical plate and the water suction pump, the sludge is scraped from the bottom of the tank, the water is filtered out, the water in the sludge is sucked out through the water suction pipe, the residual water in the sludge is removed, and the sludge on the bottom of the tank is cleaned, the self-cleaning is realized through the up-down reciprocating movement of the mud scraping vertical plate, and the surface of the mud scraping vertical plate is kept clean; The double scraping assembly is matched with the spiral rotating rod and the inverted T-shaped scraping piece, the inverted T-shaped scraping piece is forced to move reciprocatingly in multiple directions, the stubborn sludge is further rubbed and cleaned, and the bottom dredging effect is further improved; The side wall dredging module is matched with the long-toothed roller and the mud scraping horizontal plate, the up-down reciprocating movement and the intermittent overturning movement of the mud scraping horizontal plate are realized, the sludge on the side wall of the tank is scraped, the sludge on the mud scraping horizontal plate is poured, the surface of the mud scraping horizontal plate is kept clean, and the secondary pollution of the tank wall is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to facilitate the understanding of those skilled in the art, the present application is further described below with reference to the drawings.

[0015] Figure 1 The present application is the whole structure and the secondary sedimentation tank. Figure 2 The present application is the whole structure and the secondary sedimentation tank. Figure 3 The present application is the whole structure and the secondary sedimentation tank. Figure 4 The present application is the whole structure and the secondary sedimentation tank. Figure 5 The present application is the whole structure and the secondary sedimentation tank. Figure 6 The present application is the whole structure and the secondary sedimentation tank. Figure 7 The present application is the whole structure and the secondary sedimentation tank. Figure 8 The present application is the whole structure and the secondary sedimentation tank.

[0016] In the figure: 1, main beam; 2, support beam; 101, cylinder one; 102, auxiliary gear roller; 103, positioning cylinder; 104, motor one; 105, main gear disc; 3, bottom wall dredging module; 30, cross frame one; 31, mud scraping vertical plate; 32, motor two; 33, rotating disc; 34, circular shaft; 35, mounting plate; 36, water suction pipe; 4, re-scraping assembly; 41, sliding frame; 42, motor three; 43, spiral rotating rod; 44, spiral sleeve frame; 45, inverted T-shaped scraping piece; 5, side wall dredging module; 51, cross frame two; 52, limiting frame one; 53, limiting frame two; 54, cylinder two; 55, sleeve; 56, cross rod; 57, long gear roller; 58, spring damping shock absorbing ring; 59, mud scraping cross plate. DETAILED DESCRIPTION

[0017] The technical solutions of the present application will be described below in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0018] Embodiment one: please refer to Figures 1-5 As shown in the figure, a sewage plant secondary sedimentation tank sludge dredging and mud scraping machine comprises a main beam 1 and a support beam 2, the support beam 2 is fixedly connected with the main beam 1 through support rods fixedly installed at the top surface of both ends, a cylinder one 101 is arranged at the center of the inner wall of the bottom of the main beam 1, and an auxiliary gear roller 102 is rotatably connected to the end of the telescopic rod of the cylinder one 101, and a positioning cylinder 103 is fixedly installed at the bottom of the auxiliary gear roller 102; A motor one 104 is arranged at the bottom surface of the main beam 1 adjacent to the cylinder one 101, and a main gear disc 105 is fixedly installed on the output shaft of the motor one 104 and penetrates the support beam 2, the main gear disc 105 is in meshing transmission with the auxiliary gear roller 102, and a bottom wall dredging module 3, a re-scraping assembly 4 and a side wall dredging module 5 are annularly distributed at the bottom end of the outer wall of the positioning cylinder 103; The bottom wall dredging module 3 comprises a cross frame one 30 fixedly installed at the outer wall of one side of the positioning cylinder 103, a mud scraping vertical plate 31 is vertically and penetratively arranged inside the cross frame one 30, a sliding groove and a screen are respectively inlaid at the upper and lower end positions of the cross frame one 30 inside the mud scraping vertical plate 31, a motor two 32 is arranged at the center of the top end of the cross frame one 30 through a machine base, a rotating disc 33 is fixedly installed on the front end output shaft of the motor two 32, a circular shaft 34 is fixedly installed at the lower center position of the front end surface of the rotating disc 33, and the circular shaft 34 is in sliding cooperation with the sliding groove; Before scraping mud, the main beam 1 is transversely placed on the top of the sedimentation tank, the support beam 2 is clamped at the tank opening of the sedimentation tank, then air cylinder one 101 is started, the auxiliary rotating tooth roller 102, the positioning cylinder 103, the bottom wall dredging module 3, the re-scraping assembly 4 and the side wall dredging module 5 are synchronously settled by the telescopic rod, the main rotating tooth disc 105 is driven to rotate by motor one 104 and rotates by meshing with the auxiliary rotating tooth roller 102, at this time, the positioning cylinder 103 drives the bottom wall dredging module 3, the re-scraping assembly 4 and the side wall dredging module 5 to rotate synchronously, and the inside wall and the side wall of the bottom of the sedimentation tank are treated by scraping mud in all directions in turn; When the bottom wall dredging module 3 is operated, the bottom of the mud scraping vertical plate 31 is in contact with the bottom surface of the sedimentation tank, the positioning cylinder 103 drives the horizontal frame one 30 and the mud scraping vertical plate 31 to rotate, and the sludge on the inside wall of the bottom of the sedimentation tank is scraped in a circle; The mud scraping vertical plate 31 is fixedly installed with the mounting plate 35 at the top, the rear end plate body of the mounting plate 35 extends to the outside of the horizontal frame one 30, a plurality of groups of water suction pipes 36 in inverted T-shaped structure are fixedly installed on the bottom of the mounting plate 35 and away from the rear end of the horizontal frame one 30, a water suction pump is arranged between the top of the water suction pipe 36 and the mounting plate 35, and the bottom pipe body of the water suction pipe 36 is provided in a mesh surface; When the mud scraping vertical plate 31 completes one circle scraping, the motor two 32 is started to drive the rotating disc 33 to rotate, the rotating disc 33 drives the circular shaft 34 to slide in the sliding groove, the circular shaft 34 pushes the mud scraping vertical plate 31 to move vertically in the horizontal frame one 30, and the sludge deposited on the bottom of the mud scraping vertical plate 31 is knocked off, so that the self-cleaning of the mud scraping vertical plate 31 is realized; It is worth noting that in the process of the mud scraping vertical plate 31 scraping mud in a circle, the amount of sludge pushed increases gradually, and the water content of the collected sludge also increases accordingly, therefore, when the accumulated sludge is higher than or flush with the mesh plate, the water in the sludge is discharged through the mesh holes, so that the excess water in the sludge is filtered; At the same time, the water suction pump is started to suck and collect the filtered water, and the bottom pipe body of the water suction pipe 36 is provided in a mesh surface, so that the water in the sludge is further filtered by the mesh surface to reduce the sludge entering the inside of the water suction pipe 36, so as to avoid affecting the scraping effect; The bottom wall dredging module 3 is arranged, the inside wall of the bottom of the sedimentation tank can be scraped and treated, the problem that the accumulation of sludge affects the normal use of the sedimentation tank is effectively avoided, the water suction pump and the water suction pipe 36 are arranged, and the discharged water can be sucked and collected.

[0019] Example two: please refer to Figure 2 , Figure 3 and Figure 6As shown, the complex scraping assembly 4 includes a sliding frame 41 fixedly installed at the rear end of the positioning cylinder 103, a motor three 42 fixedly installed at the inner wall of the rear end of the sliding frame 41, a spiral rotating rod 43 fixedly installed at the front end of the output shaft of the motor three 42, a spiral sleeve frame 44 sleeved outside the spiral rotating rod 43, and a T-shaped scraping piece 45 movably arranged at the bottom of the spiral sleeve frame 44. The bottom surface of the sliding frame 41 is provided with a corrugated groove, the top of the T-shaped scraping piece 45 is slidably connected with the inner groove arranged at the bottom of the spiral sleeve frame 44, and the bottom end of the T-shaped scraping piece 45 penetrates through the corrugated groove and extends to the outside of the sliding frame 41. During the cleaning process of the inner wall of the bottom of the sedimentation tank, the motor three 42 drives the spiral rotating rod 43 to rotate, the spiral rotating rod 43 drives the spiral sleeve frame 44 to reciprocate, and the T-shaped scraping piece 45 is synchronously moved. Through this way, the T-shaped scraping piece 45 is forced to reciprocate along the inner wall of the bottom of the tank, and the stubborn sludge on the inner wall of the bottom of the tank is scraped and wiped.

[0020] At the same time, the T-shaped scraping piece 45 also slides along the corrugated groove during the movement, which not only realizes the front and back movement, but also limits the left and right movement direction, further enhances the friction of the T-shaped scraping piece 45 on the inner wall of the bottom of the sedimentation tank, more effectively scrapes and removes the sludge at the bottom of the sedimentation tank, and avoids the residue of the sludge.

[0021] Example three: please refer to Figure 2 , Figure 3 , Figure 7 - Figure 8 As shown, the side wall dredging module 5 includes a horizontal frame two 51 fixedly installed at the other side of the outer wall of the positioning cylinder 103, and the horizontal frame two 51 is arranged in a left-right staggered manner with the horizontal frame one 30. The horizontal frame two 51 is provided with a clamping groove at the end away from the positioning cylinder 103, and a limiting frame one 52 and a limiting frame two 53 in a reverse concave shape are fixedly installed in the clamping groove. The limiting frame two 53 is provided with a gear groove group at the top end of the inner wall of the rear end; The limiting frame one 52 is provided with a gas cylinder two 54 at the top inner wall, and the distal end of the telescopic rod of the gas cylinder two 54 is fixedly connected with a sleeve 55. The sleeve 55 is transversely provided with a horizontal rod 56 inside, one end of the horizontal rod 56 extends to the inside of the limiting frame two 53 and is sleeved with a long toothed roller 57. The inner wall of the long toothed roller 57 is slidably connected with a slide bar through a fixed connection, and the outer wall of the horizontal rod 56 is provided with a long groove at the corresponding position; A spring damping shock absorbing ring 58 is fixedly installed between one end of the horizontal rod 56 and the inner wall of the corresponding long toothed roller 57. The long toothed roller 57 is fixedly installed with a mud scraping plate 59 at one end extending to the outside of the limiting frame, and the mud scraping plate 59 is provided with a curved surface structure on one side matched with the wall of the tank, so that the mud scraping plate 59 can better fit the shape of the side wall of the sedimentation tank, thereby improving the uniformity and completeness of the mud scraping; When the side wall of the sedimentation tank is cleaned, the positioning cylinder 103 drives the horizontal frame two 51 to rotate synchronously. At this time, the curved end of the mud scraping plate 59 is in close contact with the pool wall. The air cylinder two 54 is started, which uses the telescopic rod to pull the sleeve 55, the horizontal rod 56, the long tooth roller 57 and the mud scraping plate 59 to reciprocate up and down. Through this way, the mud scraping plate 59 is forced to repeatedly scrape the side wall of the sedimentation tank up and down. When the mud scraping plate 59 moves upward, the sludge on the pool wall is pushed upward until it approaches the pool opening position. At this time, the long tooth roller 57 is engaged with the tooth groove group at the top end of the limiting frame two 53, so as to realize the overturning of the long tooth roller 57, the horizontal rod 56 and the mud scraping plate 59. In this way, the accumulated sludge on the surface of the mud scraping plate 59 is poured down, reducing the sludge adhered to the surface of the mud scraping plate 59. The sludge falls to the bottom of the pool and is subsequently scraped and discharged by the mud scraping vertical plate 31. When the air cylinder two 54 pushes the mud scraping plate 59 to move downward, the sludge area is further scraped again, and the mud scraping plate 59 is assisted to return to the original position. The horizontal frame two 51 continues to rotate with the positioning cylinder 103, and the mud scraping area of the mud scraping vertical plate 31 also changes constantly. It is worth noting that the spring damping shock absorbing ring 58 fixedly installed between one end of the horizontal rod 56 and the inner wall of the corresponding long tooth roller 57 plays a buffering and damping role. During the mud scraping process, when the mud scraping plate 59 encounters the protrusions or uneven parts of the side wall of the sedimentation tank, the spring damping shock absorbing ring 58 can absorb part of the impact force, protecting the mud scraping mechanism and the sedimentation tank from being damaged. As shown above, by setting the bottom wall dredging module 3, the re-scraping assembly 4 and the side wall dredging module 5 and other structures, the sludge in the secondary sedimentation tank of the sewage plant is fully dredged and scraped, the mechanisms work cooperatively, the mud scraping efficiency and effect are improved, and the tediousness and cost of manual cleaning are reduced.

[0022] Working principle: First, the main beam 1 is horizontally erected above the secondary sedimentation tank of the sewage plant, ensuring that the support beam 2 can be stably clamped at the edge of the pool opening of the sedimentation tank. Then, the air cylinder one 101 pushes the auxiliary gear roller 102, the positioning cylinder 103, the bottom wall dredging module 3, the re-scraping assembly 4 and the side wall dredging module 5 installed on the positioning cylinder 103 to descend as a whole by using the telescopic rod, until the mud scraping parts are in close contact with the inner wall and the bottom of the sedimentation tank. At the same time, the motor one 104 drives the main gear disc 105 to rotate. Since the main gear disc 105 and the auxiliary gear roller 102 are in meshing transmission, the auxiliary gear roller 102, the positioning cylinder 103, the bottom wall dredging module 3, the re-scraping assembly 4 and the side wall dredging module 5 are forced to rotate synchronously, and the bottom and side wall of the sedimentation tank are subjected to all-round mud scraping treatment. During the mud scraping process, the bottom of the mud scraping vertical plate 31 of the bottom wall dredging module 3 is in close contact with the bottom surface of the sedimentation tank. With the rotation of the positioning cylinder 103, the mud scraping vertical plate 31 performs circumferential scraping on the sludge on the inner wall of the bottom of the sedimentation tank. At the same time, the water suction pipe 36 at the top of the mud scraping vertical plate 31 continuously sucks the water in the scraped sludge under the action of the water suction pump, realizing the separation of sludge and water, reducing the sludge entering the inside of the water suction pipe 36, and avoiding affecting the mud scraping effect; The inverted T-shaped scraping sheet 45 in the re-scraping assembly 4 moves back and forth along the inner wall of the bottom of the sedimentation tank under the driving of the spiral rotating rod 43, and performs scraping treatment on stubborn sludge blocks. The multidirectional reciprocating movement enhances the friction of the inverted T-shaped scraping sheet 45 on the sludge, more effectively scrapes and removes the sludge, and avoids sludge residue; Then, the mud scraping horizontal plate 59 of the side wall dredging module 5 reciprocates up and down with the rotation of the positioning cylinder 103, and scrapes the side wall of the sedimentation tank. When the mud scraping horizontal plate 59 moves upward, it pushes the sludge on the tank wall upward, and when it moves downward, it further scrapes the sludge area. At the same time, the long-toothed roller 57 is engaged with the tooth groove group at the top end of the limiting frame two 53, realizing the overturning of the mud scraping horizontal plate 59, and dumping the sludge accumulated on the surface of the mud scraping horizontal plate 59; During the entire mud scraping process, the mechanisms work cooperatively to ensure comprehensive dredging and mud scraping treatment of the sludge. After the mud scraping is completed, the main beam 1 and the support beam 2 are lifted out of the sedimentation tank as a whole through the corresponding lifting mechanism, and the one-time dredging and mud scraping operation is completed.

[0023] The preferred embodiments disclosed above are only used to help explain the application. The preferred embodiments do not describe all the details and do not limit the application to the specific embodiments. Obviously, many modifications and changes can be made according to the content of the specification. The embodiments are selected and described in detail in order to better explain the principles and practical applications of the application, so that those skilled in the art can well understand and utilize the application. The application is limited by the claims and their entire scope and equivalents.

Claims

1. A sludge dredging and scraping machine for secondary sedimentation tanks of sewage plants, comprising a main beam (1) and a support beam (2), characterized in that: The support beam (2) is fixedly connected with the main beam (1) through the support rod fixedly installed at the top end, the bottom inner wall of the main beam (1) is provided with a cylinder (101), and the telescopic rod of the cylinder (101) is rotatably connected with an auxiliary gear roller (102), and the bottom of the auxiliary gear roller (102) is fixedly installed with a positioning cylinder (103). The bottom surface of the main beam (1) is provided with a motor (104) adjacent to the cylinder (101), and the output shaft of the motor (104) penetrates the support beam (2) and is fixedly installed with a main gear disc (105), the main gear disc (105) is in meshing transmission with the auxiliary gear roller (102), and the outer wall of the positioning cylinder (103) is annularly provided with a bottom wall dredging module (3), a double scraping assembly (4) and a side wall dredging module (5). The bottom wall dredging module (3) comprises a horizontal frame (30) fixedly installed on the outer wall of one side of the positioning cylinder (103), a mud scraping vertical plate (31) is vertically and penetratively arranged in the horizontal frame (30), and a sliding groove and a mesh are respectively embedded in the inside of the mud scraping vertical plate (31) and located at the upper and lower ends of the horizontal frame (30).

2. A sludge dredging and scraping machine for secondary sedimentation tanks of sewage plants according to claim 1, characterized in that The center of the top end of the horizontal frame (30) is provided with a motor (32) through a machine base, and the front end output shaft of the motor (32) is fixedly installed with a rotating disc (33), the center of the front end surface of the rotating disc (33) is fixedly installed with a circular shaft (34), and the circular shaft (34) is in sliding cooperation with the sliding groove.

3. A secondary sedimentation tank sludge dredging and scraping device according to claim 2, characterized in that The top of the mud scraping vertical plate (31) is fixedly installed with a mounting plate (35), and the rear end plate body of the mounting plate (35) extends to the outside of the horizontal frame (30), a plurality of groups of water suction pipes (36) of inverted T-shaped structure are fixedly installed on the bottom of the mounting plate (35) and located away from the rear end of the horizontal frame (30), a water suction pump is arranged between the top of the water suction pipe (36) and the mounting plate (35), and the bottom pipe body of the water suction pipe (36) is provided with a mesh surface.

4. A sludge dredging and scraping machine for secondary sedimentation tanks of sewage plants according to claim 1, characterized in that The double scraping assembly (4) comprises a sliding frame (41) fixedly installed at the rear end of the positioning cylinder (103), a motor (42) is fixedly installed on the rear end inner wall of the sliding frame (41), the output shaft of the motor (42) is fixedly installed with a spiral rotating rod (43), the spiral rotating rod (43) is sleeved with a spiral sleeve frame (44), and the spiral sleeve frame (44) is movably provided with an inverted T-shaped scraping piece (45).

5. A secondary sedimentation tank sludge dredging and scraping device according to claim 4, characterized in that The bottom surface of the sliding frame (41) is provided with a corrugated groove, the top of the inverted T-shaped scraping piece (45) is in sliding cooperation with the inner groove arranged at the bottom of the spiral sleeve frame (44), and the bottom end of the inverted T-shaped scraping piece (45) penetrates the corrugated groove and extends to the outside of the sliding frame (41).

6. A sludge dredging and scraping machine for secondary sedimentation tanks of sewage plants according to claim 1, characterized in that The side wall dredging module (5) comprises a horizontal frame (51) fixedly installed on the outer wall of the other side of the positioning cylinder (103), and the horizontal frame (51) is arranged in a left-right staggered manner with the horizontal frame (30), the horizontal frame (51) is provided with a clamping groove away from the positioning cylinder (103), and the clamping groove is fixedly installed with a limiting frame (52) and a limiting frame (53) of inverted concave structure, and the rear end inner wall of the limiting frame (53) is provided with a gear slot group at the top end.

7. A secondary sedimentation tank sludge dredging and scraping device according to claim 6, characterized in that The inner wall at the top of the limiting frame one (52) is provided with a cylinder two (54), and the telescopic rod tail of the cylinder two (54) is fixedly connected with a sleeve (55), and the inside of the sleeve (55) is transversely provided with a horizontal rod (56), one end of the horizontal rod (56) extends into the inside of the limiting frame two (53) and is sleeved with a long toothed roller (57), and the inner wall of the long toothed roller (57) is slidably connected with the long groove provided at the corresponding position of the outer wall of the horizontal rod (56) through fixed connection.

8. A secondary sedimentation tank sludge dredging and scraping device according to claim 7, characterized in that A spring damping shock absorbing ring (58) is fixedly installed between one end of the horizontal rod (56) and the inner wall of the corresponding long toothed roller (57), one end of the long toothed roller (57) extends to the outside of the limiting frame and is fixedly installed with a mud scraping horizontal plate (59), and one side of the mud scraping horizontal plate (59) is provided with a curved surface structure matched with the pool wall.

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