Sewage treatment apparatus with backflush protection

Abstract

The present application relates to sewage filtering technical field, and disclose sewage treatment device with backflush protection, including frame and rotary installation in the frame inner wall drum frame, the outer wall of drum frame is provided with several filter plates, the top surface of frame is fixedly installed with backflush shell matched with filter plate, the end of frame is provided with drive structure for driving drum frame, the present application is through the centrifugal force generated by drum frame rotation cooperation filter plate physical filtration, realize the efficient interception of large particle impurities in sewage and solid-liquid preliminary separation, the filtered water can directly enter subsequent depth treatment process, the preliminary purification effect is good, the efficiency is high, the backflush assembly and scraping assembly run synchronously with drum frame, high pressure backflush can all-roundly wash off the filter plate surface impurities, the closed backflush shell avoids washing water splashing pollution, the scraping assembly further removes stubborn impurities, double cleaning effectively prevents filter plate filter hole blockage, always guarantee the stability of filtering efficiency and treatment effect.

Description

Technical Field

[0001] This invention relates to the field of wastewater filtration technology, and more particularly to a wastewater treatment device with backwash protection. Background Technology

[0002] Rotary drum wastewater filters are continuously operating solid-liquid separation devices. The core of the filter is a horizontally rotating cylindrical filter screen, which relies on gravity / micro-pressure to drive filtration. It is combined with a top high-pressure spray / scraper to achieve backwashing without stopping the machine. It is widely used in municipal wastewater pretreatment, pre-treatment of industrial wastewater (paper / textile / food), pre-interception of MBR / ultrafiltration, and aquaculture tailwater treatment. It can replace traditional sedimentation tanks and significantly reduce the footprint.

[0003] Currently, most backwashing devices in traditional rotary drum filters on the market use a fixed installation structure during actual operation. The relative position of the backwash nozzle and the rotary drum filter plate remains unchanged, allowing only point-to-point rinsing of a localized area of ​​the filter plate. This fails to achieve full coverage rinsing of the entire circumferential and axial surfaces of the filter cartridge. During backwashing, the high-pressure water flow directly impacts the filter plate, and the lack of proper guidance and constraint in the water flow direction and impact intensity easily causes a large amount of backwash water to splash outwards, wasting water resources and polluting surrounding equipment and the working environment. Furthermore, due to the fixed rinsing position and limited rinsing range, areas far from the direct spray of the nozzle, as well as uneven areas and gaps on the filter plate, easily become rinsing dead zones. Suspended solids and impurities adhering to the filter plate surface cannot be effectively removed. Long-term operation leads to filter plate clogging, reduced water flow area, and increased filtration resistance, ultimately directly affecting the overall filtration effect and continuous stable operation capability of the rotary drum filter.

[0004] Therefore, it is necessary to design wastewater treatment devices with backflushing protection to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a wastewater treatment device with backflushing protection.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A wastewater treatment device with backwash protection includes a frame and a rotating drum frame rotatably mounted on the inner wall of the frame. The outer wall of the rotating drum frame is provided with a plurality of filter plates. A backwash shell adapted to the filter plates is fixedly mounted on the top surface of the frame. A drive structure for driving the rotating drum frame is provided at the end of the frame. A backwash assembly for backwashing the filter plates is provided on the inner wall of the backwash shell. A water supply pipe for supplying water to the backwash assembly is provided on the inner wall of the backwash shell. A scraping assembly that cooperates with the backwash assembly to scrape and clean the filter plates is provided on the inner side of the backwash shell. A linkage structure for linking the rotating drum frame, the backwash assembly, and the scraping assembly is provided at the end of the backwash shell. The recoil assembly includes a drive rod rotatably mounted on the inner wall of the recoil shell. A fixing plate corresponding to the drive rod is fixedly mounted on the inner wall of the recoil shell. Several recoil high-pressure nozzles arranged in a linear array are provided on the side of the fixing plate. Several sets of mounting structures for mounting the recoil high-pressure nozzles are provided on the drive rod.

[0007] As a preferred embodiment of the present invention, the installation structure includes a collar fitted onto the outer wall of a drive rod, and the outer wall of the drive rod has a reciprocating thread that is screwed onto the collar. A connecting telescopic plate is fixedly installed on the outer wall of the collar. A swing arm is rotatably installed on the side of the fixed plate, and the telescopic end of the connecting telescopic plate is rotatably connected to the top end of the swing arm. An installation ring is fixedly installed at the bottom end of the swing arm. The backflush high-pressure nozzle is disposed inside the installation ring. The backflush high-pressure nozzle is connected to the water supply pipe through a conduit. A nozzle cleaning assembly for cleaning the nozzle of the backflush high-pressure nozzle is provided inside the backflush housing.

[0008] As a preferred embodiment of the present invention, the nozzle cleaning assembly includes a sliding plate that is slidably mounted on the inner wall of the backflush housing and is parallel to the fixed plate. The top surface of the backflush high-pressure nozzle is fixedly mounted with an mounting plate. The mounting plate and the sliding plate are rotatably connected by a shaft. The top surface of the sliding plate is fixedly mounted with an operating plate, and the top end of the operating plate passes through the outer wall of the backflush housing. A limit frame is fixedly fitted on the outer wall of the operating plate. A cleaning structure is provided on the inner side of the mounting ring.

[0009] As a preferred embodiment of the present invention, the shaft and the swing arm are coaxially arranged at the rotatable connection position with the fixed plate.

[0010] As a preferred embodiment of the present invention, the cleaning structure includes an installation port formed on the inner wall of the mounting ring, a rotating shaft rotatably mounted on the inner wall of the installation port, a cleaning plate fixedly fitted on the outer wall of the rotating shaft, a torsion spring fitted on the end of the rotating shaft, and the two ends of the torsion spring being fixedly connected to the rotating shaft and the installation port, respectively.

[0011] As a preferred embodiment of the present invention, the end of the cleaning plate away from the rotating shaft is configured as an arc shape that adapts to the inner wall of the mounting ring.

[0012] As a preferred embodiment of the present invention, the scraping assembly includes a drive rod 2 rotatably mounted on the inner wall of the backflush shell. The outer wall of the drive rod 2 is fitted with a plurality of collars 2 arranged in a linear array. The outer wall of the drive rod 2 is provided with a reciprocating thread that is screwed to the collars 2. The outer wall of the collars 2 is symmetrically hinged with two top plates. The bottom ends of the two top plates are hinged with scraping plates adapted to the filter plate. A spring is fixedly installed between the two top plates.

[0013] As a preferred embodiment of the present invention, connecting blocks are fixedly installed at the four corners of the scraper, and the bottom surface of the connecting blocks is provided with a ball mounting groove, and a supporting ball is movably installed on the inner wall of the ball mounting groove.

[0014] As a preferred embodiment of the present invention, the linkage structure includes a linkage gear rotatably mounted on the side wall of the recoil shell and fixedly connected to one end of the drive rod; a transmission wheel rotatably mounted on the side wall of the recoil shell and fixedly connected to the two ends of the drive rod; a drive gear fixedly mounted on the side of the transmission wheel; a drive ring body that fits against the outer wall of the transmission wheel fixedly mounted at the end of the drum frame; and a transmission gear rotatably mounted on the side wall of the recoil shell that meshes with the linkage gear and the drive gear.

[0015] As a preferred embodiment of the present invention, a sewage pipe for supplying water to the inside of the drum frame is provided on the side of the frame, and a drain pipe adapted to the backflush shell is provided through the side of the frame.

[0016] The present invention has the following beneficial effects: 1. This invention utilizes the centrifugal force generated by the rotation of the drum frame in conjunction with the physical filtration of the filter plate to achieve efficient interception of large particulate impurities and preliminary solid-liquid separation in wastewater. The filtered clean water can directly enter the subsequent deep treatment process, resulting in good preliminary purification effect and high efficiency. At the same time, the backwash component and the scraping component operate synchronously with the drum frame. The high-pressure backwash can wash away impurities on the surface of the filter plate from all directions, and the closed backwash shell avoids splashing and contamination by the backwash water. The scraping component further removes stubborn impurities. The dual cleaning effectively prevents the filter plate pores from clogging, ensuring the stability of filtration efficiency and treatment effect. 2. The backwash assembly of this invention converts the rotation of the drive rod into the reciprocating swing of the high-pressure backwash nozzle through a linkage structure. Combined with the high-pressure water jet, it achieves thorough backwash cleaning of the outer wall of the filter plate without dead angles. The cleaning coverage is wide and the impurity removal effect is excellent. At the same time, the nozzle is equipped with a convenient self-cleaning structure. The operator only needs to pull and reset the operation plate to clean the clogged nozzle by brushing and scraping through the torsion spring linkage cleaning plate. The operation is simple and convenient, without complicated disassembly, and can quickly restore the backwash effect of the nozzle, ensuring the continuous and stable operation of the backwash assembly. 3. The scraping assembly of this invention is driven by drive rod two to achieve reciprocating scraping. The reciprocating thread direction of drive rod one and drive rod two is opposite, so that the scraping plate and the backwash high-pressure nozzle form a reverse linkage, making the scraping and cleaning and high-pressure backwashing operations more seamlessly connected, improving the overall cleaning efficiency. At the same time, the scraping plate contacts the filter plate through the support ball, which not only provides support and reduces sliding friction, but also, with the elastic force of the spring, ensures that the scraping plate fits tightly against the filter plate while avoiding hard compression, effectively reducing the probability of filter plate deformation and ensuring the structural integrity of the filter plate and long-term filtration effect. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the wastewater treatment device with backflushing protection proposed in this invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the wastewater treatment device with backflushing protection proposed in this invention. Figure 2 ; Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 This is a schematic diagram of the backflush shell structure of the wastewater treatment device with backflush protection proposed in this invention; Figure 5 This is a partial cross-sectional view of the backflush shell of the wastewater treatment device with backflush protection proposed in this invention. Figure 6 for Figure 5 Enlarged structural diagram at point B; Figure 7 This is a schematic diagram of the end structure of the drive rod one and drive rod two of the wastewater treatment device with backwash protection proposed in this invention; Figure 8 This is a schematic diagram of the collar and mounting ring structure of the wastewater treatment device with backflushing protection proposed in this invention; Figure 9 This is a schematic diagram of the scraping assembly structure of the wastewater treatment device with backflushing protection proposed in this invention.

[0018] In the diagram: 1. Frame; 2. Drum frame; 3. Filter plate; 4. Backflush housing; 5. Backflush assembly; 51. Drive rod one; 52. Fixing plate; 53. Collar one; 54. Swing arm; 55. Connecting telescopic plate; 56. Mounting ring; 57. Backflush high-pressure nozzle; 58. Conduit; 6. Water supply pipes; 7. Cleaning nozzle assembly; 71. Slide plate; 72. Mounting plate; 73. Shaft; 74. Control panel; 75. Limit frame; 76. Mounting port; 77. Rotary shaft; 78. Cleaning plate; 79. Torsion spring; 8. Scraping assembly; 81. Drive rod two; 82. Collar two; 83. Top plate; 84. Scraping plate; 85. Spring; 86. Connecting block; 87. Mounting ball groove; 88. Support ball; 9. Linkage structure; 91. Linkage gear; 92. Transmission wheel; 93. Drive gear; 94. Drive ring body; 95. Transmission gear; 10. Drive structure; 11. Sewage pipe; 12. Drainage pipe. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] Example 1: This example describes a wastewater treatment device with backflushing protection disclosed in this embodiment. (Refer to...) Figure 1-9 The system includes a frame 1 and a rotating drum frame 2 rotatably mounted on the inner wall of the frame 1. The outer wall of the rotating drum frame 2 is provided with several filter plates 3. A backwash shell 4 adapted to the filter plates 3 is fixedly installed on the top surface of the frame 1. A drive structure 10 for driving the rotating drum frame 2 is provided at the end of the frame 1. A sewage pipe 11 for supplying water to the inside of the rotating drum frame 2 is provided on the side of the frame 1. A sewage pipe 12 adapted to the backwash shell 4 is provided through the side of the frame 1. A backwash assembly 5 for backwashing the filter plates 3 is provided on the inner wall of the backwash shell 4. A water supply pipe 6 for supplying water to the backwash assembly 5 is provided on the inner wall of the backwash shell 4. A scraping assembly 8 for scraping and cleaning the filter plates 3 in cooperation with the backwash assembly 5 is provided on the inner side of the backwash shell 4. A linkage structure 9 for linking the rotating drum frame 2, the backwash assembly 5, and the scraping assembly 8 is provided at the end of the backwash shell 4.

[0021] The implementation principle of this embodiment is as follows: When the equipment is put into use, the wastewater to be treated is continuously transported to the inside of the drum frame 2 through the wastewater pipe 11. The drum frame 2 maintains stable rotation under the power drive of the matching drive structure 10. After the wastewater enters the drum frame 2, it quickly adheres to the outer filter plate 3 under the centrifugal force generated by the rotation of the drum frame 2. At the same time, with the help of the physical filtration effect of the filter plate 3, large particulate solid impurities in the wastewater are effectively intercepted and filtered out, achieving preliminary solid-liquid separation. The filtered clean water then smoothly passes through the filter holes of the filter plate 3 and exits the drum frame 2 to enter the subsequent deep treatment process. Through the combination of the rotation centrifugal force of the drum frame 2 and the precise filtration of the filter plate 3, the preliminary purification and filtration treatment of the wastewater is efficiently completed. During the continuous filtration process, the backwash assembly 5 and scraping assembly 8 mounted on the backwash shell 4 are synchronized with the drum frame 2 through the transmission of the linkage structure 9. The backwash cleaning water supplied by the external water supply pipe 6 is pressurized by the water outlet structure of the backwash assembly 5 and sprayed evenly, and the spray range can cover the entire outer wall of the filter plate 3, achieving all-round high-pressure rinsing without dead angles. It can quickly wash off the impurities attached to and trapped on the surface of the filter plate 3. At the same time, the closed structure of the backwash shell 4 can effectively contain the rinsing water, avoiding water splashing during the rinsing process and preventing the surrounding environment from being polluted. The rinsing wastewater carrying the washed-off impurities can be discharged through the drain pipe 12 to the collection frame located at one end of the inner side of the drum frame 2 (e.g., Figure 4(As shown) The wastewater is collected centrally and discharged along the sewage pipe 12 for treatment; at the same time, the scraping component 8 moves synchronously with the linkage structure 9 to continuously scrape and clean the outer wall of the filter plate 3, further removing stubborn impurities remaining on the filter plate 3 after rinsing, preventing the filter holes of the filter plate 3 from becoming clogged, and always ensuring that the filter plate 3 maintains a good permeability state, so as to ensure that the filtration efficiency and treatment effect of the entire sewage preliminary filtration process are stable and reliable.

[0022] Example 2: Based on Example 1, this example discloses a wastewater treatment device with backflushing protection, such as... Figure 5 , Figure 7 and Figure 8 As shown, the recoil assembly 5 includes a drive rod 51 rotatably mounted on the inner wall of the recoil shell 4. A fixing plate 52 corresponding to the drive rod 51 is fixedly mounted on the inner wall of the recoil shell 4. Several recoil high-pressure nozzles 57 arranged in a linear array are provided on the side of the fixing plate 52. Several sets of mounting structures for mounting the recoil high-pressure nozzles 57 are provided on the drive rod 51. The mounting structure includes a collar 53 fitted onto the outer wall of a drive rod 51, and the outer wall of the drive rod 51 has a reciprocating thread that is screwed onto the collar 53. A connecting telescopic plate 55 is fixedly mounted on the outer wall of the collar 53. A swing arm 54 is rotatably mounted on the side of the fixed plate 52, and the telescopic end of the connecting telescopic plate 55 is rotatably connected to the top end of the swing arm 54. An mounting ring 56 is fixedly mounted on the bottom end of the swing arm 54. A backflush high-pressure nozzle 57 is located inside the mounting ring 56. The backflush high-pressure nozzle 57 is connected to the water supply pipe 6 through a conduit 58. A nozzle cleaning assembly 7 for cleaning the nozzle of the backflush high-pressure nozzle 57 is provided inside the backflush housing 4.

[0023] The implementation principle of this embodiment is as follows: During operation, the power of the drum frame 2 is synchronously transmitted to the drive rod 51 through the linkage structure 9, causing the drive rod 51 to rotate continuously. Because the outer wall of the drive rod 51 has reciprocating threads and is threadedly engaged with the collar 53, and the collar 53 is connected to the outer swing arm 54 of the fixed plate 52 fixed to the inner wall of the recoil shell 4 via the connecting telescopic plate 55, the rotational motion of the drive rod 51 can be precisely converted into the reciprocating horizontal movement of the collar 53 along the axial direction of the drive rod 51. During this movement, the collar 53 exerts a pulling and pushing force on the swing arm 54 through the connecting telescopic plate 55, causing the swing arm 54 to hinge with the fixed plate 52. The contact point is a pivot point that reciprocates on the side of the fixed plate 52, thereby driving the backwash high-pressure nozzle 57 on the inner side of the mounting ring 56 at the bottom of the swing arm 54 to reciprocate synchronously with the swing arm 54; the flushing water in the external water supply pipe 6 is stably delivered to the backwash high-pressure nozzle 57 through the special conduit 58, and after being pressurized by the nozzle, it is sprayed out in the form of high-pressure water jet. With the reciprocating swing trajectory of the backwash high-pressure nozzle 57, the high-pressure flushing water can form a large-area spray coverage area, covering the outer surface of the filter plate 3 in all directions without dead angles, and efficiently backwashing and cleaning the impurities attached to the filter plate 3, ensuring that the impurities on the surface of the filter plate 3 are completely washed off, and ensuring the filtration permeability of the filter plate 3.

[0024] Example 3: Based on Example 1, this example discloses a wastewater treatment device with backflushing protection, such as... Figure 4 , Figure 6 , Figure 7 and Figure 8 As shown, the nozzle assembly 7 includes a slide plate 71 that is slidably installed on the inner wall of the backflush housing 4 and is parallel to the fixed plate 52. The top surface of the backflush high-pressure nozzle 57 is fixedly installed with a mounting plate 72. The mounting plate 72 and the slide plate 71 are rotatably connected by a shaft 73. The shaft 73 and the swing arm 54 are coaxially arranged at the rotatable connection position with the fixed plate 52. The top surface of the slide plate 71 is fixedly installed with an operating plate 74, and the top of the operating plate 74 passes through the outer wall of the backflush housing 4. The outer wall of the operating plate 74 is fixedly fitted with a limit frame 75. A cleaning structure is provided on the inner side of the mounting ring 56. The cleaning structure includes a mounting port 76 opened in the inner wall of the mounting ring 56. A rotating shaft 77 is rotatably mounted on the inner wall of the mounting port 76. A cleaning plate 78 is fixedly fitted on the outer wall of the rotating shaft 77. The end of the cleaning plate 78 away from the rotating shaft 77 is set to an arc shape that matches the inner wall of the mounting ring 56. A torsion spring 79 is fitted on the end of the rotating shaft 77, and the two ends of the torsion spring 79 are fixedly connected to the rotating shaft 77 and the mounting port 76, respectively.

[0025] The implementation principle of this embodiment is as follows: During the swinging backwash operation of the backwash high-pressure nozzle 57, the shaft 73 on the top surface of the backwash high-pressure nozzle 57 is coaxially positioned with the swing arm 54 and the fixed plate 52. This structural design allows the mounting plate 72 and the shaft 73 to rotate synchronously with the backwash high-pressure nozzle 57. Simultaneously, the connection between the shaft 73 and the slide plate 71 has a certain degree of damping. Damping is a mature existing technology and will not be elaborated upon here. After long-term use, the nozzle of the backwash high-pressure nozzle 57 is prone to rust due to impurities adhering to it in the water. The current blockage problem directly reduces the backwash water pressure and coverage area, therefore, regular cleaning and maintenance of the nozzles are necessary. During operation, the operator simply pulls the control plate 74 outwards until the limit frame 75 on the control plate 74 contacts the backwash housing 4. At this point, the control plate 74 is fully pulled into position. During the pulling of the control plate 74, the sliding plate 71 drives the shaft 73 and mounting plate 72 in a coordinated manner, thereby pulling the backwash high-pressure nozzle 57 to slide along the mounting ring 56. The sliding of the backwash high-pressure nozzle 57... During the process, under the elastic force of the torsion spring 79, the rotating shaft 77 will drive the cleaning plate 78 to rotate synchronously. When the backwash high-pressure nozzle 57 smoothly slides out of the limit range of the mounting ring 56, the cleaning plate 78 just completes the rotation and is precisely positioned at the corresponding position of the nozzle of the backwash high-pressure nozzle 57. At this time, the equipment maintains normal operation. The mounting ring 56 continues to swing with the swing arm 54, and the cleaning plate 78 will also swing together. During the swing, the bristles on the cleaning plate 78 will fully contact and rub against the nozzle surface, which can effectively brush away and clean the impurities attached to the nozzle, thus avoiding nozzle blockage from the root. During this process, the damping between the shaft 73 and the slide plate 71 can ensure the stability of the backwash high-pressure nozzle 57. After the nozzle cleaning work is completed, the operator only needs to push the operating plate 74 in the opposite direction to easily reset the backwash high-pressure nozzle 57 to the working position in the mounting ring 56, and the equipment can resume normal operation. The backwash high-pressure nozzle 57 continues to perform all-round high-pressure backwashing treatment on the filter plate 3 to ensure the filtration permeability of the filter plate 3.

[0026] Example 4: Based on Example 1, this example discloses a wastewater treatment device with backflushing protection, such as... Figure 7 and Figure 9 As shown, the scraping assembly 8 includes a drive rod 81 rotatably mounted on the inner wall of the recoil shell 4. The outer wall of the drive rod 81 is fitted with several collars 82 arranged in a linear array. The outer wall of the drive rod 81 is provided with reciprocating threads that are screwed to the collars 82. The outer wall of the collars 82 is symmetrically hinged with two top plates 83. The bottom ends of the two top plates 83 are hinged with scraping plates 84 that are adapted to the filter plate 3. A spring 85 is fixedly installed between the two top plates 83. Connecting blocks 86 are fixedly installed at the four corners of the scraping plates 84. The bottom surface of the connecting blocks 86 is provided with a ball mounting groove 87. A supporting ball 88 is movably installed on the inner wall of the ball mounting groove 87.

[0027] The implementation principle of this embodiment is as follows: During the sewage filtration process, the power of the rotary drum 2 is synchronously transmitted to the drive rod 81 through the linkage structure 9, causing the drive rod 81 to rotate continuously. Because the outer wall of the drive rod 81 has reciprocating threads and is threadedly engaged with the collar 82, and the scraper 84 connected to the top plate 83 by the collar 82 always remains in contact with the outer wall of the filter plate 3, the rotational motion of the drive rod 81 is precisely converted into the horizontal reciprocating sliding of the collar 82 along the axial direction of the drive rod 81. When the collar 82 moves, it drives the scraper 84 to reciprocate synchronously through the top plate 83, allowing the scraper 84 to continuously scrape the outer wall of the filter plate 3, removing solid impurities attached to the surface of the filter plate 3. Furthermore, the reciprocating threads of the drive rod 51 and the drive rod 81 are set in opposite directions, ensuring that the reciprocating sliding direction of the scraper 84 is always opposite to the reciprocating swing direction of the backwash high-pressure nozzle 57. The reverse linkage allows for a more seamless connection between scraping and high-pressure backwashing, improving the overall cleaning effect. Simultaneously, the supporting balls 88 within the ball grooves 87 on the bottom surface of the connecting blocks 86 at the four corners of the scraper 84 directly contact the outer wall of the filter plate 3. This provides stable support for the scraper 84 and reduces frictional resistance between the scraper 84 and the filter plate 3 during sliding. Meanwhile, the springs 85 between the top plates 83 maintain an elastic contraction tendency, generating an elastic force that keeps the two top plates 83 moving closer together. This continuously presses the scraper 84 against the outer wall of the filter plate 3, ensuring a good fit and effective scraping. Furthermore, the limiting support of the supporting balls 88 prevents the scraper 84 from directly and rigidly pressing against the surface of the filter plate 3, effectively reducing the probability of deformation due to excessive force and ensuring the integrity and efficiency of the filter plate 3's filtration structure.

[0028] Example 5: Based on Example 1, this example discloses a wastewater treatment device with backflushing protection, such as... Figure 2 and Figure 3 As shown, the linkage structure 9 includes a linkage gear 91 rotatably mounted on the side wall of the recoil shell 4 and fixedly connected to the end of the drive rod 51; a transmission wheel 92 rotatably mounted on the side wall of the recoil shell 4 and fixedly connected to the end of the drive rod 81; a drive gear 93 fixedly mounted on the side of the transmission wheel 92; a drive ring 94 fixedly mounted at the end of the drum frame 2 and fitting against the outer wall of the transmission wheel 92; and a transmission gear 95 rotatably mounted on the side wall of the recoil shell 4 and meshing with the linkage gear 91 and the drive gear 93.

[0029] The implementation principle of this embodiment is as follows: The drum frame 2 rotates continuously during wastewater filtration. Its rotational power is synchronously transmitted to the drive ring 94, causing it to rotate as well. The outer wall of the drive ring 94 and the outer wall of the transmission wheel 92 maintain a tight contact during transmission. Under the friction between them, the rotational motion of the drive ring 94 is precisely transmitted to the transmission wheel 92, thereby driving the transmission wheel 92 and the coaxially fixed drive gear 93 to rotate synchronously. The drive gear 93 meshes with the linkage gear 91 through the transmission gear 95. Under the meshing transmission between gears, the drive gear 93 and the linkage gear 91 rotate synchronously. The drive rod 51 and the drive rod 81 are connected to the corresponding linkage gear 91 and drive gear 93, respectively. Finally, through this series of gear meshing transmissions, the synchronous power drive of the drive rod 51 and the drive rod 81 is realized, so that the two can obtain stable rotational power to drive the subsequent backwash and scraping components to operate. This ensures that the backwash cleaning and scraping impurity removal operations can be carried out synchronously with the filtration operation of the drum frame 2, forming a linkage and cooperation working state.

[0030] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A wastewater treatment device with backwash protection, comprising a frame (1) and a rotating drum frame (2) rotatably mounted on the inner wall of the frame (1), wherein the outer wall of the rotating drum frame (2) is provided with a plurality of filter plates (3), a backwash shell (4) adapted to the filter plates (3) is fixedly mounted on the top surface of the frame (1), and a drive structure (10) for driving the rotating drum frame (2) is provided at the end of the frame (1), characterized in that, The inner wall of the backwash shell (4) is provided with a backwash assembly (5) for backwashing the filter plate (3), the inner wall of the backwash shell (4) is provided with a water supply pipe (6) for supplying water to the backwash assembly (5), the inner side of the backwash shell (4) is provided with a scraping assembly (8) that cooperates with the backwash assembly (5) to scrape and clean the filter plate (3), and the end of the backwash shell (4) is provided with a linkage structure (9) for linking the drum frame (2), the backwash assembly (5), and the scraping assembly (8). The recoil assembly (5) includes a drive rod (51) rotatably mounted on the inner wall of the recoil shell (4). The inner wall of the recoil shell (4) is fixedly mounted with a fixing plate (52) corresponding to the drive rod (51). The side of the fixing plate (52) is provided with a number of recoil high-pressure nozzles (57) arranged in a linear array. The drive rod (51) is provided with a number of mounting structures for mounting the recoil high-pressure nozzles (57).

2. The wastewater treatment device with backflushing protection according to claim 1, characterized in that, The installation structure includes a collar (53) fitted on the outer wall of the drive rod (51), and the outer wall of the drive rod (51) is provided with a reciprocating thread that is screwed to the collar (53). A connecting telescopic plate (55) is fixedly installed on the outer wall of the collar (53). A swing arm (54) is rotatably installed on the side of the fixed plate (52), and the telescopic end of the connecting telescopic plate (55) is rotatably connected to the top end of the swing arm (54). An installation ring (56) is fixedly installed at the bottom end of the swing arm (54). The backwash high-pressure nozzle (57) is located inside the installation ring (56). The backwash high-pressure nozzle (57) is connected to the water supply pipe (6) through a conduit (58). A nozzle cleaning assembly (7) for cleaning the nozzle of the backwash high-pressure nozzle (57) is provided inside the backwash shell (4).

3. The wastewater treatment device with backflushing protection according to claim 2, characterized in that, The nozzle assembly (7) includes a slide plate (71) that is slidably mounted on the inner wall of the backflush housing (4) and parallel to the fixing plate (52). The top surface of the backflush high-pressure nozzle (57) is fixedly mounted with an mounting plate (72). The mounting plate (72) and the slide plate (71) are rotatably connected by a shaft (73). The top surface of the slide plate (71) is fixedly mounted with an operating plate (74), and the top of the operating plate (74) passes through the outer wall of the backflush housing (4). The outer wall of the operating plate (74) is fixedly fitted with a limit frame (75). The inner side of the mounting ring (56) is provided with a cleaning structure.

4. The wastewater treatment device with backflushing protection according to claim 3, characterized in that, The shaft (73) and the swing arm (54) are coaxially arranged at the rotatable connection position with the fixed plate (52).

5. The wastewater treatment device with backflushing protection according to claim 3, characterized in that, The cleaning structure includes an installation port (76) opened on the inner wall of the installation ring (56), a rotating shaft (77) is rotatably installed on the inner wall of the installation port (76), a cleaning plate (78) is fixedly fitted on the outer wall of the rotating shaft (77), a torsion spring (79) is fitted on the end of the rotating shaft (77), and the two ends of the torsion spring (79) are fixedly connected to the rotating shaft (77) and the installation port (76) respectively.

6. The wastewater treatment device with backflushing protection according to claim 5, characterized in that, The end of the cleaning plate (78) away from the pivot (77) is configured to be arc-shaped to fit the inner wall of the mounting ring (56).

7. The wastewater treatment device with backflushing protection according to claim 1, characterized in that, The scraping assembly (8) includes a second drive rod (81) rotatably mounted on the inner wall of the recoil shell (4). The outer wall of the second drive rod (81) is fitted with several collars (82) arranged in a linear array. The outer wall of the second drive rod (81) is provided with a reciprocating thread that is screwed to the collars (82). The outer wall of the collars (82) is symmetrically hinged with two top plates (83). The bottom ends of the two top plates (83) are hinged with scraping plates (84) that are adapted to the filter plate (3). A spring (85) is fixedly installed between the two top plates (83).

8. The wastewater treatment device with backflushing protection according to claim 7, characterized in that, Connecting blocks (86) are fixedly installed at the four corners of the scraper (84). The bottom surface of the connecting block (86) is provided with a ball mounting groove (87), and a supporting ball (88) is movably installed on the inner wall of the ball mounting groove (87).

9. The wastewater treatment device with backflushing protection according to claim 7, characterized in that, The linkage structure (9) includes a linkage gear (91) rotatably mounted on the side wall of the recoil shell (4) and fixedly connected to the end of the drive rod (51). A transmission wheel (92) fixedly connected to the end of the drive rod (81) is rotatably mounted on the side wall of the recoil shell (4). A drive gear (93) is fixedly mounted on the side of the transmission wheel (92). A drive ring body (94) that fits against the outer wall of the transmission wheel (92) is fixedly mounted on the end of the drum frame (2). A transmission gear (95) that meshes with the linkage gear (91) and the drive gear (93) is rotatably mounted on the side wall of the recoil shell (4).

10. The wastewater treatment device with backflushing protection according to claim 1, characterized in that, The side of the frame (1) is provided with a sewage pipe (11) for supplying water to the inside of the drum frame (2), and the side of the frame (1) is provided with a sewage pipe (12) adapted to the backflush shell (4).

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