Sand filtration treatment device for tail water of sewage plant

Abstract

The utility model belongs to the technical field of sewage treatment, and particularly relates to a sewage plant tail water sand filtration treatment device which comprises a sand filtration tank, a sand washing mechanism is installed in the sand filtration tank and comprises a sand scraping assembly and a sand washing assembly, the sand washing mechanism comprises a second rotating shaft, and a first bevel gear is fixedly arranged at one end of the second rotating shaft. The first bevel gear is in meshed connection with a second bevel gear which is fixedly arranged at one end of a transmission shaft, the other end of the transmission shaft is fixedly provided with a third bevel gear which is in meshed connection with a fourth bevel gear, the fourth bevel gear is fixedly arranged at one end of a first rotating shaft, and the second rotating shaft, the transmission shaft and the first rotating shaft are rotationally clamped on the outer shell. And a plurality of crushing teeth are uniformly distributed on the curved side surface of the crushing roller. When the sand scraping assembly is driven by the sand washing assembly to rotate around the axis of the sand filter tank, the crushing roller is driven by the gear mechanism to rotate, so that hardened filter sand is efficiently crushed through crushing teeth arranged on the crushing roller, and blockage during sand suction is prevented.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment technology, specifically relating to a sand filtration treatment device for wastewater effluent from a wastewater treatment plant. Background Technology

[0002] Utility model patent CN222342071U discloses a continuous backwashing sand filter device, including a sand filter tank. One side of the sand filter tank has an inlet pipe, and the other side has an outlet pipe. A distributor seat is located at the end of the inlet pipe that extends into the sand filter tank. The sand filter tank contains a sand washing mechanism, which includes a sand washing assembly and a stirring assembly. The sand washing assembly is located inside the sand filter tank and includes: a sand washing box, fixedly mounted on the top of the sand filter tank; a sand suction pipe, fixedly mounted inside the sand washing box, with the inlet pipe and distributor seat located on the outer side of the bottom of the sand suction pipe; and a sand outlet pipe, fixedly mounted at the bottom of the sand washing box. The stirring assembly is located inside the sand washing assembly and is used to stir the inside of the sand washing box and the bottom of the sand suction pipe. Rotation of the filter tank allows pollutants and water to be discharged from the outlet. The centrifugal force during rotation also prevents sand from caking. A rotating rod drives the stirring rod to rotate, stirring the bottom of the sand suction pipe.

[0003] However, the above-mentioned mechanism has the following problems: When the agitation component scrapes sand and foreign objects off the inner wall of the sand filter tank, if the viscosity of the foreign objects is high and the sand and gravel are severely compacted, the scraper in the agitation component cannot effectively crush the compacted sand and gravel. The resistance encountered during rotation is large, which can easily cause the agitation component to deform or break. In addition, the compacted sand and gravel will also cause blockage, which will greatly reduce the back suction and cleaning effect of the sand and gravel. Utility Model Content

[0004] To address the above problems, the purpose of this utility model is to provide a sand filtration treatment device for wastewater effluent, which solves the problem that existing sand filtration devices cannot effectively crush large pieces of hardened sand and gravel when cleaning the inner wall of the sand filter tank, thus causing equipment damage and reduced sand cleaning efficiency.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a sand filtration treatment device for wastewater effluent from a sewage treatment plant, comprising a sand filter tank, an inlet pipe on one side of the sand filter tank, an outlet pipe on the other side of the sand filter tank, a liquid separator installed at one end of the inlet pipe extending into the interior of the sand filter tank, a sand washing mechanism installed inside the sand filter tank, the sand washing mechanism comprising a sand scraping assembly and a sand washing assembly, the sand washing mechanism comprising a second rotating shaft, the second rotating shaft being installed at the bottom of a sand suction pipe in the sand washing assembly, a first helical gear fixed at one end of the second rotating shaft, the first helical gear meshing with the second helical gear, the second helical gear fixed at one end of a transmission shaft, a third helical gear fixed at the other end of the transmission shaft, the third helical gear meshing with a fourth helical gear, the fourth helical gear fixed at one end of the first rotating shaft, the second rotating shaft, the transmission shaft, and the first rotating shaft being rotatably mounted on a housing, a crushing roller being installed on the outer side of the first rotating shaft, and multiple crushing teeth being evenly distributed on the curved side surface of the crushing roller.

[0006] The beneficial effects of this utility model are as follows: when the sand scraping assembly rotates around the axis of the sand filter tank under the drive of the sand washing assembly, the crushing roller rotates under the drive of the gear mechanism, thereby efficiently crushing the clumped filter sand through the crushing teeth arranged on the crushing roller, preventing blockage during sand suction.

[0007] To ensure the stability of the forces acting on the sand washing mechanism during operation;

[0008] As a further improvement to the above technical solution: the number of transmission shafts is two, and they are installed on the left and right sides below the second rotating shaft.

[0009] The beneficial effects of this improvement are: the two drive shafts and the two sets of gear mechanisms and crushing rollers installed on the drive shafts can avoid the rotating shaft being subjected to force on one side during the scraping process, effectively preventing the rotating shaft from being completely deformed or broken due to uneven force over a long period of time.

[0010] For easy replacement and installation of the crushing rollers;

[0011] As a further improvement to the above technical solution: the crushing roller is slidably mounted on the outside of the rotating shaft one, and the end of the rotating shaft one away from the helical gear four is formed with an annular groove adapted to fit the snap ring, and one end face of the snap ring is attached to one end face of the crushing roller.

[0012] The beneficial effect of this improvement is that after removing the retaining ring, the operator can easily replace and install the crushing roller on the rotating shaft.

[0013] In order to effectively reduce the manufacturing cost and weight of the crushing roller;

[0014] As a further improvement to the above technical solution: the crushing roller includes an inner tube body, one end of a connecting plate is connected to the outer side of the inner tube body, the other end of the connecting plate is connected to the inner wall of the outer tube body, and the crushing teeth are disposed on the outer side of the outer tube body.

[0015] The beneficial effects of this improvement are: the hollow structure of the crushing roller can effectively reduce its weight and cost.

[0016] To ensure the stability of the transmission between the rotating shaft and the crushing roller;

[0017] As a further improvement to the above technical solution: the inner wall of the inner tube is formed with a plug-in block, and the curved side surface of the first rotating shaft is formed with a plug-in groove adapted to the plug-in block, and the plug-in groove passes through the end face of the first rotating shaft away from the helical gear four.

[0018] The beneficial effect of this improvement is that after the insertion slot and the insertion block are engaged with each other, the power of the rotating shaft can be stably transmitted to the crushing roller.

[0019] In order to effectively ensure the cleaning effect of the crushing roller;

[0020] As a further improvement to the above technical solution: the axis of the first rotating shaft is parallel to the conical surface where the inclined inner wall of the lower side of the sand filter tank is located.

[0021] The beneficial effect of this improvement is that the crushing roller rotates around the axis of the sand filter tank during the rotation of the sand washing assembly, thereby effectively cleaning the inclined inner wall of the lower side of the sand filter tank.

[0022] The rotational operation is to make the scraping assembly rotate under the drive of the sand washing assembly;

[0023] As a further improvement to the above technical solution: the sand washing assembly includes a sand washing box fixedly installed on the top of the sand filter tank, a sand outlet pipe fixedly installed at the bottom of the sand washing box, the liquid inlet pipe and the liquid distribution seat are both located on the outside of the bottom of the sand suction pipe, a drive motor is installed on the top of the sand filter tank, the output shaft of the drive motor is connected to the filter box, the filter box is rotatably installed inside the sand washing box, and the filter box is fixedly connected to the sand suction pipe.

[0024] The beneficial effect of this improvement is that the sand washing component can drive the sand scraping component to rotate stably through the sand suction pipe.

[0025] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0026] Figure 1 This is a cross-sectional view of the present invention;

[0027] Figure 2 This is a cross-sectional view of the sand-scraping component in this utility model;

[0028] Figure 3 This is a schematic diagram of the rotating shaft in this utility model;

[0029] Figure 4 This is a schematic diagram of the structure of the crushing roller in this utility model;

[0030] In the diagram: 1. Sand filter tank; 2. Inlet pipe; 3. Outlet pipe; 4. Sand washing mechanism; 5. Liquid distribution seat; 6. Sand scraping assembly; 7. Outer shell; 8. Helical gear one; 9. Drive shaft; 10. Helical gear two; 11. Helical gear three; 12. Helical gear four; 13. Rotating shaft one; 131. Insert groove; 14. Crushing roller; 141. Inner tube; 142. Insert block; 143. Connecting plate; 144. Outer tube; 145. Crushing teeth; 15. Compressed air lifting assembly; 16. Sand washing assembly; 17. Rotating shaft two; 18. Snap ring. Detailed Implementation

[0031] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0032] Example 1:

[0033] like Figure 1As shown in Figure 4: A wastewater treatment plant effluent sand filtration device includes a sand filter tank 1. An inlet pipe 2 is provided on one side of the sand filter tank 1, and an outlet pipe 3 is provided on the other side. A liquid separator 5 is installed at one end of the inlet pipe 2 that extends into the sand filter tank 1. A sand washing mechanism 4 is installed inside the sand filter tank 1. The sand washing mechanism 4 includes a sand scraping assembly 6 and a sand washing assembly 16. The sand washing mechanism 4 includes a second rotating shaft 17, which is installed at the bottom of a suction pipe in the sand washing assembly 16. A helical gear 8 is fixedly mounted at one end of the second rotating shaft 17, and the helical gear 8 meshes with a second helical gear 10. The second helical gear 10 is fixedly mounted at one end of a transmission shaft 9, and a third helical gear 11 is fixedly mounted at the other end of the transmission shaft 9. Helical gear 311 meshes with helical gear 412. Helical gear 412 is fixed at one end of rotating shaft 13. Rotating shaft 217, transmission shaft 9, and rotating shaft 13 are rotatably mounted on housing 7. A crushing roller 14 is installed on the outer side of rotating shaft 13. Multiple crushing teeth 145 are evenly distributed on the curved side of crushing roller 14. When the sand scraping assembly 6 rotates around the axis of sand filter tank 1 under the drive of sand washing assembly 16, crushing roller 14 rotates under the drive of gear mechanism, thereby efficiently crushing the compacted filter sand through the crushing teeth 145 arranged on crushing roller 14, preventing blockage during sand suction. There are two transmission shafts 9, which are installed on the left and right sides below rotating shaft 217. The two transmission shafts 9 and two sets of... The gear mechanism and crushing roller 14 on the drive shaft 9 can prevent the rotating shaft 17 from being subjected to force on one side during the scraping process, effectively preventing the rotating shaft 17 from being completely deformed or broken due to uneven force over a long period of time. The crushing roller 14 is slidably fitted on the outside of the rotating shaft 13. The end of the rotating shaft 13 away from the helical gear 12 is formed with an annular groove for fitting a snap ring 18. One end face of the snap ring 18 is close to one end face of the crushing roller 14. After removing the snap ring 18, the operator can easily replace and install the crushing roller 14 on the rotating shaft 13. The crushing roller 14 includes an inner tube 141. The outer side of the inner tube 141 is connected to one end of a connecting plate 143, and the other end of the connecting plate 143 is connected to the inner wall of the outer tube 144. The teeth 145 are set on the outer surface of the outer tube 144. The hollow structure of the crushing roller 14 can effectively reduce its weight and cost. The inner wall of the inner tube 141 is formed with a plug-in block 142. The curved side surface of the rotating shaft 13 is formed with a plug-in groove 131 that fits the plug-in block 142. The plug-in groove 131 passes through the end face of the rotating shaft 13 away from the helical gear 12. After the plug-in groove 131 and the plug-in block 142 are engaged with each other, the power of the rotating shaft 13 can be stably transmitted to the crushing roller 14. The axis of the rotating shaft 13 is parallel to the conical surface where the inclined inner wall of the sand filter tank 1 is located. During the rotation of the sand washing assembly 16, the crushing roller 14 rotates around the axis of the sand filter tank 1, thereby effectively cleaning the inclined inner wall of the sand filter tank 1.The sand washing assembly 16 includes a sand washing box fixedly installed on the top of the sand filter tank 1. A sand outlet pipe is fixedly installed at the bottom of the sand washing box. The liquid inlet pipe 2 and the liquid separator 5 are both located on the outer side of the bottom of the suction pipe. A drive motor is installed on the top of the sand filter tank 1. The output shaft of the drive motor is connected to the filter box, which is rotatably installed inside the sand washing box. The filter box is fixedly connected to the suction pipe. The sand washing assembly 16 can drive the sand scraping assembly 6 to rotate stably through the suction pipe.

[0034] The working principle of this technical solution is as follows: Wastewater is transported to the sand filter tank 1 through the inlet pipe 2. The liquid distribution seat 5 installed at one end of the inlet pipe 2 extends into the sand filter tank 1, which will evenly disperse the wastewater and avoid excessive local water flow from impacting the filter sand layer, thus ensuring the stable filtration effect of the filter sand on the wastewater. Under the action of gravity, the wastewater passes through the filter sand layer from top to bottom. Impurities in the water are intercepted by the filter sand, and the purified water is discharged from the outlet pipe 3. The drive motor starts, and its output shaft drives the filter box in the sand washing box to rotate, thereby rotating the suction pipe in the sand washing assembly 16. Since the sand scraping assembly 6 is connected to the suction pipe, the sand scraping assembly 6 will rotate during the sand washing process. Driven by the sand scraping component 16, the sand scraping component 6 rotates around the axis of the sand filter tank 1. During the rotation, it can scrape up the impurities accumulated at the bottom of the sand filter tank 1, preventing the impurities from accumulating and causing the filter sand to clump, thus maintaining the filtration performance of the filter sand. When the sand suction pipe rotates, the rotating shaft 17 installed at its bottom rotates accordingly. The helical gear 8 at one end of the rotating shaft 17 meshes with the helical gear 10. The helical gear 10 is fixed at one end of the transmission shaft 9. Therefore, the rotation of the rotating shaft 17 is transmitted to the transmission shaft 9 through the meshing of the helical gear 8 and the helical gear 10, causing the transmission shaft 9 to rotate. The helical gear 11 at the other end of the transmission shaft 9 meshes with the helical gear 12. The helical gear 12 is fixed at one end of the rotating shaft 13. The rotation of the drive shaft 9 drives the rotating shaft 13 to rotate, which in turn causes the crushing roller 14, mounted on the outside of the rotating shaft 13, to rotate. The two drive shafts 9 are mounted opposite each other on the left and right sides below the rotating shaft 17, preventing the rotating shaft 17 from being subjected to force on one side and thus preventing deformation or breakage due to uneven stress over a long period. When the crushing roller 14 rotates, the crushing teeth 145 on its curved side surface crush the clump of filter sand, preventing blockage during sand suction. The inner tube 141 of the crushing roller 14 is connected to the outer tube 144 via a connecting plate 143, forming a hollow structure. The weight and manufacturing cost of the crushing roller 14 are reduced. The insertion block 142 on the inner wall of the inner tube 141 is engaged with the insertion groove 131 on the curved side of the rotating shaft 13, ensuring that the power of the rotating shaft 13 is stably transmitted to the crushing roller 14. The axis of the rotating shaft 13 is parallel to the conical surface of the inclined inner wall on the lower side of the sand filter tank 1, so that the crushing roller 14 can effectively clean the inclined inner wall on the lower side of the sand filter tank 1 when rotating around the axis of the sand filter tank 1. The sand suction pipe of the sand washing component 16 sucks the scraped impurities and crushed filter sand into the sand washing box, and then discharges them from the sand filter tank 1 through the sand outlet pipe, thereby realizing the cleaning of the filter sand and the removal of impurities.

[0035] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or changes can be made without departing from the principles of the present invention, and the above technical features can also be combined in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A sand filtration treatment device for wastewater effluent from a wastewater treatment plant, characterized in that: The system includes a sand filter tank (1), with an inlet pipe (2) on one side and an outlet pipe (3) on the other side. A liquid separator (5) is installed at one end of the inlet pipe (2) that extends into the sand filter tank (1). A sand washing mechanism (4) is installed inside the sand filter tank (1). The sand washing mechanism (4) includes a scraping assembly (6) and a washing assembly (16). The washing mechanism (4) includes a second rotating shaft (17), which is installed at the bottom of the suction pipe in the washing assembly (16). A helical gear (8) is fixed at one end of the second rotating shaft (17). Helical gear 1 (8) meshes with helical gear 2 (10), helical gear 2 (10) is fixed at one end of transmission shaft (9), helical gear 3 (11) is fixed at the other end of transmission shaft (9), helical gear 3 (11) meshes with helical gear 4 (12), helical gear 4 (12) is fixed at one end of rotating shaft 1 (13), rotating shaft 2 (17), transmission shaft (9) and rotating shaft 1 (13) are rotatably clamped on outer shell (7), crushing roller (14) is installed on the outer side of rotating shaft 1 (13), and multiple crushing teeth (145) are evenly distributed on the curved side surface of crushing roller (14).

2. The wastewater treatment plant effluent sand filtration device according to claim 1, characterized in that: There are two drive shafts (9), which are installed on the left and right sides below the rotating shaft (17).

3. The wastewater treatment plant effluent sand filtration device according to claim 1, characterized in that: The crushing roller (14) is slidably mounted on the outside of the rotating shaft (13). The end of the rotating shaft (13) away from the helical gear (12) is formed with an annular groove adapted to the snap ring (18). One end face of the snap ring (18) is attached to one end face of the crushing roller (14).

4. The wastewater treatment plant effluent sand filtration device according to claim 1, characterized in that: The crushing roller (14) includes an inner tube (141), one end of a connecting plate (143) is connected to the outer side of the inner tube (141), the other end of the connecting plate (143) is connected to the inner wall of the outer tube (144), and the crushing teeth (145) are disposed on the outer side of the outer tube (144).

5. The wastewater treatment plant effluent sand filtration device according to claim 4, characterized in that: The inner wall of the inner tube (141) is formed with a plug-in block (142), and the curved side surface of the first rotating shaft (13) is formed with a plug-in groove (131) adapted to the plug-in plug-in block (142), and the plug-in groove (131) passes through the end face of the first rotating shaft (13) away from the helical gear (12).

6. The wastewater treatment plant effluent sand filtration device according to claim 1, characterized in that: The axis of the rotating shaft (13) is parallel to the conical surface of the inclined inner wall on the lower side of the sand filter tank (1).

7. The wastewater treatment plant effluent sand filtration device according to claim 1, characterized in that: The sand washing assembly (16) includes a sand washing box fixedly installed on the top of the sand filter tank (1), a sand outlet pipe fixedly installed at the bottom of the sand washing box, the liquid inlet pipe (2) and the liquid separator (5) are both located on the outside of the bottom of the sand suction pipe, a drive motor is installed on the top of the sand filter tank (1), the output shaft of the drive motor is connected to the filter box, the filter box is rotatably installed inside the sand washing box, and the filter box is fixedly connected to the sand suction pipe.

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