Scraper device for sewage sedimentation tank

Abstract

The utility model discloses a scraper device for sewage sedimentation tank, including sedimentation tank body and set up the sewage collection bin on one side of the bottom of sedimentation tank body, both sides inner wall of sedimentation tank body are sealed rotatingly install two assembly shaft, four assembly shaft all be equipped with double-headed elastic limit shaft, and the limit shaft is equipped with two-headed elastic limit shaft, and the two-headed elastic limit shaft is equipped with two-headed elastic limit shaft through the two-headed elastic limit shaft through the two-headed elastic limit shaft. The outer surfaces of the four elastic limiting shafts are fixedly sleeved with chain wheels. And the two chain wheels on the same side are jointly engaged and sleeved with chains, and the adjacent sides of the two chains are jointly and fixedly connected with a mounting rod. According to the sludge scraping device, the assembly shaft, the double-end elastic limiting shaft, the chain wheel, the chain, the mounting rod, the mounting seat, the scraping plate, the transmission shaft assembly and the motor are arranged, and a concentric-square-shaped path design is adopted, so that the scraping plate runs along a preset track, sludge is ensured to be continuously scraped and intensively collected, and accumulation of impurities at the bottom of a pool is avoided. The structure can effectively prevent sludge from being pushed back to the pool wall when the scraper blade is reset, and the sludge scraping efficiency is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of scraper technology, and in particular to a scraper device for sewage sedimentation tanks. Background Technology

[0002] Wastewater sedimentation tanks, as the primary component of a wastewater treatment system, mainly utilize sedimentation to remove suspended solids from water, thereby purifying the water quality. Sedimentation tanks remove suspended solids through natural sedimentation or coagulation sedimentation, improving the efficiency of subsequent processes. They effectively reduce the suspended solids content in water through natural sedimentation or coagulation sedimentation. The design and operation of sedimentation tanks directly affect the efficiency of subsequent treatment processes and the overall treatment effect.

[0003] Currently, some sewage sedimentation tanks are equipped with scraper devices to help remove the sludge settled at the bottom of the sewage sedimentation tank.

[0004] A wastewater treatment sedimentation tank with prior art disclosure number CN222358012U includes a sedimentation tank, a cleaning mechanism and a filtration mechanism. The sedimentation tank has an inlet pipe and an outlet pipe installed on its side wall, and a sludge collection bin is connected to the bottom of the sedimentation tank. A sewage discharge pipe is installed at the bottom of the sludge collection bin.

[0005] The scraper in this sedimentation tank uses a linear reciprocating design. During the resetting process, sludge and impurities that detach from the tank wall accumulate on one side of the sedimentation tank, preventing these impurities from being effectively removed. Long-term accumulation not only hinders the normal operation of the scraper but also affects the overall sedimentation effect of the sedimentation tank.

[0006] Therefore, improvements are proposed. Utility Model Content

[0007] This utility model is a scraper device for sewage sedimentation tanks proposed to overcome the shortcomings of existing technologies.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: a scraper device for a sewage sedimentation tank, comprising a sedimentation tank body and a sludge collection bin disposed on one side of the bottom of the sedimentation tank body, wherein two assembly shafts are rotatably and sealed on both inner walls of the sedimentation tank body, and each of the four assembly shafts is limited by a double-headed elastic limiting shaft, and a sprocket is fixedly sleeved on the outer surface of each of the four elastic limiting shafts.

[0009] A chain is meshed between two sprockets on the same side, and a mounting rod is fixedly connected to the adjacent side of the two chains. A mounting base is fixedly installed on the top of the mounting rod, and a scraper is detachably fixedly inserted into the top of the mounting base.

[0010] A drive shaft assembly is installed between two adjacent double-headed elastic limiting shafts;

[0011] A motor is fixedly installed on one side of the outer surface of the sedimentation tank body, and the drive shaft of the motor passes through the sedimentation tank body and is fixedly connected to the adjacent assembly shaft.

[0012] Furthermore, the bottom side of the sedimentation tank body adopts an arc-shaped design, which facilitates better contact between the scraper and the inner wall of the sedimentation tank body.

[0013] Furthermore, each of the four assembly shafts has a spline hole at one end, which facilitates the installation of the double-headed assembly shaft.

[0014] Furthermore, each of the four double-headed elastic limiting shafts includes a support shaft, and a sprocket is fixedly sleeved on the outer surface of the support shaft. Both ends of the support shaft are provided with mounting grooves. Springs are fixedly connected to the inner wall of one side of each of the two mounting grooves. Limiting plates are fixedly connected to the other ends of each of the two springs. Splined shafts are fixedly connected to the ends of the two limiting plates away from the springs. The splined shafts pass through the mounting grooves and slide in a sealed fit with the mounting grooves. Without external force, the limiting plates and splined shafts remain in their original positions under the action of the springs.

[0015] Furthermore, auxiliary rings are fixedly fitted onto the outer surfaces of both splined shafts, and the auxiliary rings facilitate manual movement of the splined shafts.

[0016] Furthermore, both of the aforementioned drive shaft assemblies include two bearing seats, and the bearing seats are fixedly installed on one side of the inner wall of the sedimentation tank body. The inner rings of the bearings built into the two bearing seats are fixedly connected to a connecting shaft. Spline shafts are also provided at both ends of the connecting shaft. The bearing seats provide support for the connecting shaft, which is conducive to the installation of the connecting shaft.

[0017] The beneficial effects of this utility model are:

[0018] In use, this utility model discloses a scraper device for a wastewater sedimentation tank. Through an assembly shaft, a double-headed elastic limiting shaft, a sprocket, a chain, a mounting rod, a mounting base, a scraper, a transmission shaft assembly, and a motor, it employs a loop-shaped path design to ensure the scraper runs along a predetermined trajectory. This ensures continuous scraping and centralized collection of sludge, preventing the accumulation of impurities at the bottom of the tank. This structure effectively prevents sludge from being pushed back against the tank wall when the scraper resets, ensuring scraping efficiency while avoiding affecting the sedimentation effect of the sedimentation tank.

[0019] In use, this utility model provides a scraper device for a sewage sedimentation tank. The sprocket is installed via a double-headed elastic limiting shaft, which facilitates the disassembly and replacement of the sprocket and chain. Attached Figure Description

[0020] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 : Front view of this utility model;

[0022] Figure 2 : A cross-sectional view of this utility model;

[0023] Figure 3 Partial perspective view of this utility model;

[0024] Figure 4 : Schematic diagram of the installation of the double-headed elastic limiting shaft of this utility model;

[0025] Figure 5 : Schematic diagram of the double-headed elastic limiting shaft structure of this utility model.

[0026] The attached figures are labeled as follows:

[0027] 1. Sedimentation tank body; 2. Motor; 3. Sludge collection bin; 4. Bearing housing; 5. Chain; 6. Scraper; 7. Mounting base; 8. Mounting rod; 9. Sprocket; 10. Assembly shaft; 11. Support shaft; 12. Connecting shaft; 13. Spline hole; 14. Spline shaft; 15. Auxiliary ring; 16. Spring; 17. Mounting groove; 18. Limiting plate. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0029] like Figures 1 to 5 As shown, a scraper device for a sewage sedimentation tank is disclosed, including a sedimentation tank body 1 and a sludge collection bin 3 disposed on one side of the bottom of the sedimentation tank body 1. The bottom side of the sedimentation tank body 1 adopts an arc-shaped design, which can effectively guide the sludge to flow towards the sludge collection bin 3, while reducing the sludge residue at the bottom of the tank.

[0030] Two assembly shafts 10 are rotatably mounted on both sides of the inner wall of the sedimentation tank body 1. Mechanical seals are provided at the mounting points of the assembly shafts 10 and the sedimentation tank body 1 to prevent sewage from seeping into the bearings. One end of each of the four assembly shafts 10 has a spline hole 13. Each of the four assembly shafts 10 is fitted with a double-headed elastic limiting shaft. A sprocket 9 is fixedly sleeved on the outer surface of each of the four elastic limiting shafts. Each of the four double-headed elastic limiting shafts includes a support shaft 11, with the sprocket 9 fixedly sleeved on the outer surface of the support shaft 11. Both ends of the support shaft 11 have mounting points. The inner wall of one side of each of the two mounting slots 17 is fixedly connected to a spring 16. The spring 16 is made of stainless steel and has excellent corrosion resistance. Its elastic coefficient has been precisely calculated to provide sufficient preload. The other end of each of the two springs 16 is fixedly connected to a limiting plate 18. The end of each of the two limiting plates 18 away from the spring 16 is fixedly connected to a spline shaft 14. The spline shaft 14 passes through the mounting slot 17 and slides in a sealed and fitted manner with the mounting slot 17. The outer surface of each of the two spline shafts 14 is fixedly fitted with an auxiliary ring 15.

[0031] Two sprockets 9 on the same side are meshed with a chain 5. The chain 5 is made of stainless steel and its surface is specially treated to improve wear resistance. The two chains 5 are fixedly connected to a mounting rod 8 on adjacent sides. The mounting rod 8 is a hollow square tube structure, which ensures strength and reduces weight. A mounting base 7 is fixedly installed on the top of the mounting rod 8. A scraper 6 is detachably fixed to the top of the mounting base 7. The scraper 6 is fixed to the mounting base 7 by multiple bolts, which facilitates the replacement of the scraper 6.

[0032] A drive shaft assembly is installed between two adjacent double-headed elastic limiting shafts. Both drive shaft assemblies include two bearing seats 4, and the bearing seats 4 are fixedly installed on the inner wall of one side of the sedimentation tank body 1. The inner rings of the bearings built into the two bearing seats 4 are fixedly connected to the connecting shaft 12. Spline holes 13 are also opened at both ends of the connecting shaft 12. The bearings built into the bearing seats 4 are sealed bearings to avoid sewage affecting the use of the bearings.

[0033] A motor 2 is fixedly installed on one side of the outer surface of the sedimentation tank body 1, and the drive shaft of the motor 2 passes through the sedimentation tank body 1 and is fixedly connected to the adjacent assembly shaft 10. The motor 2 adopts an existing waterproof and explosion-proof motor with a protection level of IP68. The speed of the motor 2 is controlled by an existing frequency converter.

[0034] Working principle: After the motor 2 starts, it drives the assembly shaft 10 connected to it to rotate, and transmits power to the double-headed elastic limit shaft through spline connection.

[0035] The sprocket 9 on the double-headed elastic limit shaft rotates with the support shaft 11 and drives the chain 5 to run in a cycle.

[0036] The sprocket 9 drives another double-headed elastic limiting shaft to rotate through the spline hole 13, spline shaft 14 and connecting shaft 12, thereby driving the sprocket 9 connected to it to rotate, so that the other chain 5 can run in a cycle.

[0037] Since the chain 5 may experience slight deviation due to uneven force during operation, the double-headed elastic limit shaft automatically compensates for the axial deviation through the structure of spring 16 + spline shaft 14.

[0038] When the chain 5 is subjected to uneven force, the spline shaft 14 can slide in the mounting groove 17, and the spring 16 provides buffering to ensure that the sprocket 9 is always stably engaged with the chain 5, avoiding skipping or jamming.

[0039] Chain 5 drives the mounting rod 8 to move, so that scraper 6 is in close contact with the bottom of the pool to perform a closed-loop sludge scraping motion, avoiding the problem of sludge being pushed back when the traditional linear scraper is reset.

[0040] When it is necessary to replace sprocket 9 or chain 5, the spline shaft 14 is moved away from the spline hole 13 by the auxiliary ring 15. When both spline shafts 14 are disengaged from the spline hole 13, the sprocket 9 is disassembled and the replacement operation can be carried out.

[0041] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A scraper device for a sewage sedimentation tank, comprising a sedimentation tank body (1) and a sludge collection bin (3) disposed on one side of the bottom of the sedimentation tank body (1), characterized in that: The sedimentation tank body (1) has two assembly shafts (10) sealed and rotatably installed on both sides of its inner wall. Each of the four assembly shafts (10) is equipped with a double-headed elastic limiting shaft, and each of the four elastic limiting shafts has a sprocket (9) fixedly sleeved on its outer surface. A chain (5) is meshed between two sprockets (9) on the same side. An installation rod (8) is fixedly connected to the adjacent side of the two chains (5). An installation seat (7) is fixedly installed on the top of the installation rod (8). A scraper (6) is detachably fixedly inserted into the top of the installation seat (7). A drive shaft assembly is installed between two adjacent double-headed elastic limiting shafts; A motor (2) is fixedly installed on one side of the outer surface of the sedimentation tank body (1), and the drive shaft of the motor (2) passes through the sedimentation tank body (1) and is fixedly connected to the adjacent assembly shaft (10).

2. The scraper device for a sewage sedimentation tank according to claim 1, characterized in that: The bottom side of the sedimentation tank body (1) adopts an arc-shaped design.

3. The scraper device for a sewage sedimentation tank according to claim 1, characterized in that: Each of the four assembly shafts (10) has a spline hole (13) at one end.

4. The scraper device for a sewage sedimentation tank according to claim 1, characterized in that: Each of the four double-headed elastic limiting shafts includes a support shaft (11), and a sprocket (9) is fixedly sleeved on the outer surface of the support shaft (11). Both ends of the support shaft (11) are provided with mounting grooves (17). A spring (16) is fixedly connected to the inner wall of one side of each of the two mounting grooves (17). A limiting plate (18) is fixedly connected to the other end of each of the two springs (16). A spline shaft (14) is fixedly connected to the end of each of the two limiting plates (18) away from the spring (16). The spline shaft (14) passes through the mounting groove (17) and slides in a sealed fit with the mounting groove (17).

5. The scraper device for a sewage sedimentation tank according to claim 4, characterized in that: An auxiliary ring (15) is fixedly sleeved on the outer surface of both splined shafts (14).

6. The scraper device for a sewage sedimentation tank according to claim 1, characterized in that: Both of the drive shaft assemblies include two bearing seats (4), and the bearing seats (4) are fixedly installed on the inner wall of one side of the sedimentation tank body (1). The inner rings of the bearings built into the two bearing seats (4) are fixedly connected to a connecting shaft (12), and spline holes (13) are also provided at both ends of the connecting shaft (12).

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