Wastewater filtering and sewage discharge device for sedimentation tank

Abstract

The present invention relates to the technical field of sewage discharge, and specifically to a wastewater filtering and sewage discharge device for a sedimentation tank, comprising two downwardly opening impurity removal tanks, the outer sides of the impurity removal tanks being provided with a transport assembly through two upper and lower groups of connecting pipes, a storage box being fixedly installed at the bottom of the transport assembly through two arc plates, a transmission assembly being arranged inside the storage box, a support assembly being fixedly installed at the inner wall of the impurity removal tank through a plurality of connecting plates, a capping assembly being arranged on the top of the support assembly, and a sewage discharge assembly being arranged at the bottom of the support assembly; the present invention adopts a design of two impurity removal tanks and a transmission assembly, when one impurity removal tank is performing filtering work, a movable tank inside the other impurity removal tank is staggered from a hollow seat, so that impurities fall to the outside for sewage discharge work, and the transmission assembly drives two bidirectional screw rods to rotate through forward and reverse motors, so that the working states of the two impurity removal tanks are reciprocally exchanged, so that the filtering and sewage discharge work is performed uninterruptedly.

Description

Technical Field

[0001] The invention relates to the technical field of sewage discharge, in particular to a wastewater filtering and sewage discharge device for a sedimentation tank. Background Art

[0002] Sedimentation tank is one of the key links in the sewage treatment process. Its main function is to allow the suspended solid particles in the sewage to settle, thereby achieving solid-liquid separation, which not only helps to improve the quality of subsequent treatment steps, but also reduces the impact on the environment and further improves the effluent quality. The wastewater after the sedimentation tank may pass through filtering equipment, such as sand filter, activated carbon filter, etc., to remove finer suspended matter and certain dissolved substances.

[0003] Current filter materials or equipment may become clogged during the filtration process due to the accumulation of particulate matter, which requires regular cleaning or replacement of the filter media.

[0004] The Chinese patent with publication number CN117205641B discloses a sludge treatment device for agricultural sewage treatment sedimentation tank, which uses the water flow of another sewage pipe as a driving force to clean the seriously blocked sewage pipe, thereby preventing sewage from continuing to flow into the blocked filter barrel during the cleaning process, thereby improving the efficiency of sludge cleaning.

[0005] A Chinese patent with publication number CN111974036B discloses a sedimentation tank drainage device that can clean impurities adsorbed on the surface of a filter cartridge through airflow to avoid drainage blockage.

[0006] The above-mentioned and similar prior arts can solve the problem of sewage filtration to a certain extent and improve the quality of effluent water. However, after the filtering and drainage structure of the prior art has been used for a period of time, impurities will accumulate, which may easily cause blockage of the filtering components. In addition, the process of cleaning the filtering structure is usually carried out manually using cleaning tools, which results in low cleaning efficiency and increased manpower consumption. In addition, before cleaning, the filtering and drainage structure needs to be closed so that the filtering and drainage process is no longer carried out before cleaning can be carried out, thereby reducing the filtering and drainage efficiency.

[0007] Therefore, the present invention provides a wastewater filtering and sewage discharge device for a sedimentation tank that can perform filtering and cleaning alternately. Summary of the invention

[0008] Aiming at the problems that the filtering and sewage discharge structure in the prior art needs to be cleaned manually and the filtering and sewage discharge structure needs to be closed before cleaning, a wastewater filtering and sewage discharge device for a sedimentation tank is designed.

[0009] The technical solution adopted by the present invention to solve its technical problems is: a wastewater filtering and sewage discharge device for a sedimentation tank, comprising two impurity removal tanks with downward openings, the tops of the two impurity removal tanks are connected through a shunt pipe, the outer side of the impurity removal tank is provided with a transport assembly through two upper and lower groups of connecting pipes, the transport assembly is equipped to transport filtered sewage and air, the bottom of the transport assembly is fixedly installed with a storage box through two arc plates, the storage box is provided with a transmission assembly inside, the transmission assembly includes two bidirectional screw rods driven to rotate, the inner wall of the impurity removal tank is fixedly installed with a support assembly through a plurality of connecting plates, the top of the support assembly is provided with a capping assembly, and the bottom of the support assembly is provided with a sewage discharge assembly; the support assembly is equipped to support the rotation of the bidirectional screw rod; the capping assembly is equipped to seal or open one end of the shunt pipe through the bidirectional screw rod; the sewage discharge assembly is equipped to seal or open the opening at the bottom of the impurity removal tank through the bidirectional screw rod.

[0010] Furthermore, a water inlet valve is installed through the top of the diversion pipe.

[0011] Furthermore, the transport component includes two ring pipes, which are respectively connected to the connecting pipes near the top of the two impurity removal tanks, a T-shaped water outlet pipe is installed between the two ring pipes, and the T-shaped water outlet pipe is connected to the two ring pipes, and the connecting pipes near the bottom of the two impurity removal tanks are connected to an air supply pipe, and a high-speed blower is fixedly installed at the bottom of the air supply pipe, and the output end of the high-speed blower is connected to the bottom of the air supply pipe, and the output end of the high-speed blower is connected to the bottom of the air supply pipe.

[0012] Furthermore, the support assembly includes a hollow seat, which is fixedly connected to one end of the connecting plate away from the inner wall of the impurity removal tank, and the top and bottom of the hollow seat are respectively provided with placement grooves, and the inner walls on both sides of the placement groove are respectively provided with limiting grooves.

[0013] Furthermore, the top of the arc plate is fixedly connected to the bottom of the air duct, and the two arc plates are respectively located on both sides of the high-speed blower.

[0014] Furthermore, the two bidirectional screw rods are respectively rotatably installed in the storage box through bearings, and the bidirectional screw rods are rotatably installed in the hollow seat through bearings. The transmission assembly also includes a sprocket, and the sprocket is fixedly installed on the outside of the bidirectional screw rod. The outer side of the sprocket is transmission-connected with a chain. The sprocket and the chain are located on the inner side of the storage box. A forward and reverse motor is fixedly installed on the bottom of the storage box, and the output end of the forward and reverse motor passes through the bottom of the storage box and is fixedly connected to one of the bidirectional screw rods.

[0015] Furthermore, the capping assembly includes a threaded tube, which is threadedly connected to the top end of the bidirectional screw rod, and the threaded tube is located on the inner side of a placement groove near the top of the hollow seat, and limiting plates are fixedly installed on both sides of the threaded tube, and the limiting plates are located on the inner side of the limiting groove near the bottom, and a top cover is fixedly installed on the top of the threaded tube, and a rubber ring is fixedly installed on the outer side of the top cover.

[0016] Furthermore, the sewage discharge assembly includes a threaded seat, which is threadedly installed on the outside of the bidirectional screw rod, and the threaded seat is located on the inner side of the placement groove of the hollow seat near the bottom, and other limiting plates are fixedly installed on both sides of the threaded part of the threaded seat, and the limiting plates are located on the inner side of the limiting groove near the bottom, and a plurality of L-plates are fixedly installed on the outside of the threaded seat, and a movable tank with an opening facing upward is fixedly installed on one end of the L-plate away from the threaded seat, and a plurality of filter screens are installed through the interior of the movable tank, and the outer side of the movable tank is sealed in contact with the inner wall of the impurity removal tank through a sealing ring.

[0017] Beneficial effects of the present invention:

[0018] (1) The wastewater filtering and sewage discharge device for a sedimentation tank described in the present invention adopts a design of two impurity removal tanks and a transmission component. When one impurity removal tank is performing filtering work, the movable tank inside the other impurity removal tank is offset from the hollow seat, so that impurities fall to the outside for sewage discharge. The transmission component drives two bidirectional screws to rotate through forward and reverse motors, so that the working states of the two impurity removal tanks are reciprocated and discharged without stopping the machine, so that the filtering and sewage discharge work can be carried out uninterruptedly, thereby improving work efficiency.

[0019] (2) Compared with the existing alternating sewage discharge equipment, the wastewater filtering and sewage discharge device for a sedimentation tank described in the present invention adopts a special design of the transport component. When filtering is carried out in the impurity removal tank, the filter screen is connected to the ring pipe to discharge the filtered sewage. When sewage is discharged in the impurity removal tank, the filter screen is connected to the air supply pipe to allow high-speed air to pass through the filter screen and blow toward the inside of the movable tank, blowing away impurities attached to the surface of the filter screen, effectively reducing blockage and improving the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the filtering and sewage discharge device of the present invention;

[0022] Figure 2 For the present invention Figure 1 A schematic diagram of a cross-sectional three-dimensional structure;

[0023] Figure 3 It is a schematic diagram of the cross-sectional three-dimensional structure of the impurity removal tank of the present invention;

[0024] Figure 4It is a cross-sectional three-dimensional structural schematic diagram of the support assembly of the present invention;

[0025] Figure 5 It is a three-dimensional structural schematic diagram of the transmission assembly of the present invention;

[0026] Figure 6 It is a schematic diagram of the three-dimensional structure of the capping assembly of the present invention;

[0027] Figure 7 It is a schematic diagram of the three-dimensional structure of the sewage discharge assembly of the present invention;

[0028] Figure 8 It is a schematic diagram of the cross-sectional three-dimensional structure of the sewage discharge assembly of the present invention;

[0029] Fig. 9 It is a schematic diagram of the three-dimensional structure of the filtering and draining device of the present invention when it is working.

[0030] In the figure: 1. impurity removal tank; 2. diverter pipe; 3. water inlet valve; 4. connecting pipe; 5. transport component; 51. ring pipe; 52. T-shaped water outlet pipe; 53. air supply pipe; 6. high-speed blower; 7. connecting plate; 8. support component; 81. hollow seat; 82. placement groove; 83. limit groove; 9. arc plate; 10. storage box; 11. transmission component; 111. bidirectional screw rod; 112. sprocket; 113. chain; 12. forward and reverse motor; 13. capping component; 131. threaded pipe; 132. limit plate; 133. top cover; 134. rubber ring; 14. sewage discharge component; 141. threaded seat; 142. L plate; 143. movable tank; 144. filter screen; 145. sealing ring. DETAILED DESCRIPTION

[0031] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0032] Example: Figure 1-Figure 9 As shown, a wastewater filtering and sewage discharge device for a sedimentation tank described in the present invention comprises two impurity removal tanks 1 with downward openings, the tops of the two impurity removal tanks 1 are connected through a shunt pipe 2, a water inlet valve 3 is installed through the top of the shunt pipe 2, and a transport component 5 is provided on the outer side of the impurity removal tank 1 through two upper and lower groups of connecting pipes 4, the transport component 5 is assembled to transport filtered sewage and air, and the transport component 5 comprises two annular pipes 51, the two annular pipes 51 are respectively connected with the connecting pipes 4 near the tops of the two impurity removal tanks 1, a T-shaped water outlet pipe 52 is installed between the two annular pipes 51, and the T-shaped water outlet pipe 52 is communicated with the two annular pipes 51, the connecting pipes 4 near the bottom of the two impurity removal tanks 1 are connected with an air supply pipe 53, a high-speed blower 6 is fixedly installed at the bottom of the air supply pipe 53, and the output end of the high-speed blower 6 is communicated with the bottom of the air supply pipe 53.

[0033] Specifically, each group of connecting pipes 4 has multiple ones, and they are distributed in a circular array. The top group of connecting pipes 4 connects the annular pipe 51 with the impurity removal tank 1, and the bottom group of connecting pipes 4 connects the air supply pipe 53 with the impurity removal tank 1. The air supply pipe 53 is in the shape of "8", and the center position of the bottom of the air supply pipe 53 is in an open state. The high-speed blower 6 transports air into the air supply pipe 53 through the opening at the bottom of the air supply pipe 53. When the filter screen 144 in the impurity removal tank 1 is connected to the annular pipe 51, the water is filtered out. When the filter screen 144 in the impurity removal tank 1 is connected to the air supply pipe 53, the fan blows the outside air into the inner side of the impurity removal tank 1 to clean the filter screen 144.

[0034] In this embodiment, a storage box 10 is fixedly installed at the bottom of the transport component 5 through two arc plates 9, and a transmission component 11 is arranged inside the storage box 10. The transmission component 11 includes two bidirectional screw rods 111 that are driven to rotate, the top of the arc plate 9 is fixedly connected to the bottom of the air supply pipe 53, and the two arc plates 9 are respectively located on both sides of the high-speed blower 6, the two bidirectional screw rods 111 are respectively rotatably penetrated and installed in the interior of the storage box 10 through bearings, and the bidirectional screw rods 111 are rotatably penetrated through the interior of the hollow seat 81 through bearings, the transmission component 11 also includes a sprocket 112, and the sprocket 112 is fixedly installed on the outside of the bidirectional screw rod 111, and the outside of the sprocket 112 is transmission-connected with a chain 113, the sprocket 112 and the chain 113 are located on the inner side of the storage box 10, and a forward and reverse motor 12 is fixedly installed at the bottom of the storage box 10, and the output end of the forward and reverse motor 12 penetrates the bottom of the storage box 10 and is fixedly connected to one of the bidirectional screw rods 111.

[0035] Specifically, the air delivery pipe 53 can provide a stable support for the storage box 10 through the two arc plates 9, and the storage box 10 can provide a placement space and a protective function for the transmission component 11 to prevent the falling impurities from affecting the operation of the transmission component 11. The thread near the top of the bidirectional screw rod 111 is a coarse thread, and the thread near the bottom is a fine thread. The pitch of the coarse thread is twice that of the fine thread, and the length of the coarse thread is twice that of the fine thread. The thread directions of the coarse thread and the fine thread are opposite, so that when the bidirectional screw rod 111 rotates, the displacement of the capping component 13 is greater than that of the sewage discharge component 1 4, so that the top cover 133 and the inner side of the top wall of the impurity removal tank 1 reserve enough movable space to prevent the top cover 133 from obstructing the sewage from flowing down the diversion pipe 2, the coarse threads of the two bidirectional screw rods 111 are in opposite directions, and the fine threads of the two bidirectional screw rods 111 are in opposite directions, so that when the two bidirectional screw rods 111 rotate in the same direction under the transmission action of the chain 113 and the sprocket 112, the movement directions of the two capping components 13 and the two sewage discharge components 14 are opposite, so that the working states in the two impurity removal tanks 1 can be kept opposite.

[0036] In this embodiment, a support assembly 8 is fixedly installed on the inner wall of the impurity removal tank 1 through a plurality of connecting plates 7. The support assembly 8 is assembled to support the rotation of the bidirectional screw rod 111. The support assembly 8 includes a hollow seat 81. The hollow seat 81 is fixedly connected to one end of the connecting plate 7 away from the inner wall of the impurity removal tank 1. A placement groove 82 is respectively provided on the top and bottom of the hollow seat 81, and a limiting groove 83 is respectively provided on the inner walls on both sides of the placement groove 82.

[0037] Specifically, the fixed plate can provide stable support for the hollow seat 81, the interior of the hollow seat 81 can provide a through space and rotation support for the bidirectional screw rod 111 through the bearing, the hollow seat 81 can provide an opening space for two placement grooves 82, the placement grooves 82 can provide a movable space for the threaded tube 131 and the threaded seat 141, and the placement grooves 82 can provide an opening space for the limit grooves 83.

[0038] In this embodiment, a capping assembly 13 is provided at the top of the support assembly 8. The capping assembly 13 is assembled to seal or open one end of the shunt pipe 2 through a bidirectional screw rod 111. The capping assembly 13 includes a threaded tube 131. The threaded tube 131 is threadedly connected to the top end of the bidirectional screw rod 111, and the threaded tube 131 is located on the inner side of the placement groove 82 near the top of the hollow seat 81. Limiting plates 132 are fixedly installed on both sides of the threaded tube 131, and the limiting plates 132 are located on the inner side of the limiting groove 83 near the top. A top cover 133 is fixedly installed on the top of the threaded tube 131, and a rubber ring 134 is fixedly installed on the outer side of the top cover 133.

[0039] Specifically, the placement groove 82 near the top can provide a movable space for the threaded tube 131. When the bidirectional screw rod 111 rotates, the bidirectional screw rod 111 and the threaded tube 131 have a threaded effect. The threaded tube 131 moves up and down through the resistance of the limit plate 132 and the limit groove 83. The threaded tube 131 can provide a stable support for the top cover 133. The top cover 133 can provide a stable support for the rubber ring 134. The rubber ring 134 can seal the top cover 133 and the diversion pipe 2, thereby improving the sewage blocking effect.

[0040] In this embodiment, a sewage discharge component 14 is provided at the bottom of the support component 8; the sewage discharge component 14 is assembled to seal or open the opening at the bottom of the impurity removal tank 1 through a bidirectional screw rod 111, and the sewage discharge component 14 includes a threaded seat 141, the threaded seat 141 is threadedly installed on the outer side of the bidirectional screw rod 111, and the threaded seat 141 is located on the inner side of the placement groove 82 near the bottom of the hollow seat 81, and the threaded seat 141 has two sides of the threaded portion respectively fixedly installed with other limiting plates 132, and the limiting plates 132 are located on the inner side of the limiting groove 83 near the bottom, a plurality of L plates 142 are fixedly installed on the outer side of the threaded seat 141, and a movable tank 143 with an opening upward is fixedly installed on one end of the L plate 142 away from the threaded seat 141, and a plurality of filter screens 144 are installed through the interior of the movable tank 143, and the outer side of the movable tank 143 is in sealing contact with the inner wall of the impurity removal tank 1 through a sealing ring 145.

[0041] Specifically, the placement groove 82 near the bottom can provide a movable space for the threaded seat 141. When the bidirectional screw rod 111 rotates, the bidirectional screw rod 111 and the threaded seat 141 have a threaded effect. The threaded seat 141 moves up and down through the resistance of the limit plate 132 and the limit groove 83. The threaded seat 141 can provide movable support for the movable tank 143 through multiple L plates 142. The movable tank 143 can provide a through space for the filter screen 144. The filter screen 144 can filter impurities in the sewage. The movable tank 143 can provide a stable support for the sealing ring 145. The sealing ring 145 can seal the movable tank 143 and the impurity removal tank 1. When the filter screen 144 is connected to one of the annular pipe 51 or the air supply pipe 53, the sealing ring 145 can seal the other one, so that during the filtration process of the impurity removal tank 1, the sewage will not enter the inner side of the other impurity removal tank 1 along the annular pipe 51 and the T-shaped outlet pipe 52.

[0042] Working principle: The initial state is as follows Figure 2As shown, the staff first connects the water inlet valve 3 to the external sedimentation tank sewage pipe. At this time, the diverter pipe 2 is sealed by the top cover 133 and the rubber ring 134. Then, the forward and reverse motor 12 is started to rotate forward, so that the output end of the forward and reverse motor 12 drives the left bidirectional screw rod 111 to rotate, and the transmission effect of the chain 113 and the sprocket 112 drives the right bidirectional screw rod 111 to rotate together. The left bidirectional screw rod 111 drives the capping assembly 13 upward by the thread effect, so that the left capping assembly 13 moves upward and penetrates into the inner side of the diverter pipe 2, and at the same time drives the left bidirectional screw rod 111 to rotate upward. The screw rod 111 drives the sewage discharge component 14 to move downward by the thread action, so that the bottom of the movable tank 143 on the left is away from the position of the hollow seat 81, and drives the filter screen 144 to communicate with a group of connecting pipes 4 near the bottom, so that the inner side of the movable tank 143 is connected with the air supply pipe 53, and the capping component 13 on the right side moves downward to a position in contact with the hollow seat 81, and the bottom of the movable tank 143 on the right side moves upward to form a sealing contact with the hollow seat 81, and drives the filter screen 144 to communicate with the connecting pipe 4 near the top, so that the inner side of the movable tank 143 is connected with the annular pipe 51, as shown in FIG. Fig. 9 As shown;

[0043] At this time, the right-hand shunt pipe 2 is opened, so that the sewage in the sedimentation tank enters the space formed by the impurity removal tank 1, the movable tank 143 and the hollow seat 81 through the water inlet valve 3 and the shunt pipe 2. The sewage volume in the right-hand movable tank 143 rises until it submerges the filter screen 144, so that the sewage passes through the filter screen 144 and enters the inner side of the annular pipe 51 through the connecting pipe 4, and flows out to the outside from the T-shaped outlet pipe 52. The impurities are retained in the inner side of the movable tank 143 under the filtering effect of the filter screen 144, thereby performing the filtering and sewage discharge work. The left-hand annular pipe 51 and the connecting pipe 4 are sealed under the obstruction of the movable tank 143, so that the sewage cannot enter the left-hand movable tank 143.

[0044] After working for a certain period of time, the forward and reverse motors 12 start to rotate in the reverse direction again, so that the working states of the left and right impurity removal tanks 1 are exchanged, and the capping assembly 13 on the right side moves upward to block and seal the diversion pipe 2, and the movable tank 143 on the right side moves downward to be offset from the hollow seat 81, and drives the filter screen 144 to move to communicate with the air supply pipe 53, so that the impurities inside the right movable tank 143 are accompanied by a certain amount of sewage and fall to the outside from the gap between the movable tank 143 and the hollow seat 81, and the high-speed blower 6 works to blow air toward the inside of the air supply pipe 53, so that the air passes through the filter screen 144 and blows air toward the inside of the movable tank 143, blowing off the impurities attached to the surface of the filter screen 144, thereby discharging the impurities, while the filtering and sewage discharge work is carried out in the movable tank 143 on the left.

[0045] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A wastewater filtering and sewage discharge device for a sedimentation tank, comprising two impurity removal tanks (1) with openings facing downward, wherein the tops of the two impurity removal tanks (1) are connected through a shunt pipe (2), and characterized in that: The outer side of the impurity removal tank (1) is provided with a transport assembly (5) through two upper and lower groups of connecting pipes (4), the transport assembly (5) being configured to transport filtered sewage and air, the bottom of the transport assembly (5) being fixedly mounted with a storage box (10) through two arc plates (9), the interior of the storage box (10) being provided with a transmission assembly (11), the transmission assembly (11) comprising two bidirectional screw rods (111) driven to rotate, the inner wall of the impurity removal tank (1) being fixedly mounted with a support assembly (8) through a plurality of connecting plates (7), the top of the support assembly (8) being provided with a capping assembly (13), the bottom of the support assembly (8) being provided with a sewage discharge assembly (14), the sewage discharge assembly (14) comprising a movable tank (143), the interior of the movable tank (143) being penetrated by a plurality of filter screens (144); A support assembly (8) configured to support the bidirectional screw rod (111) for rotation; A capping assembly (13) which is configured to seal or open one end of the shunt pipe (2) via a bidirectional screw rod (111); A sewage discharge assembly (14) which is configured to seal or open the opening at the bottom of the impurity removal tank (1) via a bidirectional screw rod (111); The transmission assembly (11) drives the two bidirectional screw rods (111) to rotate, so that the movable tank (143) drives the filter screen (144) to move up and down respectively, correspondingly connecting the sewage and the air, so that the working states of the two impurity removal tanks (1) are reciprocated.

2. The wastewater filtering and sewage discharge device for a sedimentation tank according to claim 1, characterized in that: A water inlet valve (3) is installed through the top of the diversion pipe (2).

3. The wastewater filtering and sewage discharge device for a sedimentation tank according to claim 1, characterized in that: The transport assembly (5) comprises two annular tubes (51), the two annular tubes (51) being respectively connected to the connecting tubes (4) near the top of the two impurity removal tanks (1), a T-shaped water outlet pipe (52) being installed between the two annular tubes (51), and the T-shaped water outlet pipe (52) being connected to the two annular tubes (51), the connecting tubes (4) near the bottom of the two impurity removal tanks (1) being connected to an air supply pipe (53), a high-speed blower (6) being fixedly installed at the bottom of the air supply pipe (53), and the output end of the high-speed blower (6) being connected to the bottom of the air supply pipe (53).

4. The wastewater filtering and sewage discharge device for a sedimentation tank according to claim 1, characterized in that: The support assembly (8) comprises a hollow seat (81), the hollow seat (81) being fixedly connected to an end of the connecting plate (7) away from the inner wall of the impurity removal tank (1), the top and bottom of the hollow seat (81) being respectively provided with placement grooves (82), and the inner walls on both sides of the placement groove (82) being respectively provided with limiting grooves (83).

5. The wastewater filtering and sewage discharge device for a sedimentation tank according to claim 3, characterized in that: The top of the arc plate (9) is fixedly connected to the bottom of the air delivery pipe (53), and the two arc plates (9) are respectively located on both sides of the high-speed blower (6).

6. The wastewater filtering and sewage discharge device for a sedimentation tank according to claim 4, characterized in that: The two bidirectional screw rods (111) are respectively rotatably installed through bearings and penetrate the interior of the storage box (10), and the bidirectional screw rods (111) are rotatably installed through bearings and penetrate the interior of the hollow seat (81). The transmission assembly (11) also includes a sprocket (112), and the sprocket (112) is fixedly installed on the outside of the bidirectional screw rods (111), and the outer side of the sprocket (112) is transmission-connected with a chain (113), and the sprocket (112) and the chain (113) are located on the inner side of the storage box (10). A forward and reverse motor (12) is fixedly installed at the bottom of the storage box (10), and the output end of the forward and reverse motor (12) penetrates the bottom of the storage box (10) and is fixedly connected to one of the bidirectional screw rods (111).

7. A wastewater filtering and sewage discharge device for a sedimentation tank according to claim 6, characterized in that: The capping assembly (13) comprises a threaded tube (131), the threaded tube (131) being threadedly connected to the top end of the bidirectional screw rod (111), and the threaded tube (131) being located inside a placement groove (82) near the top of the hollow seat (81), limiting plates (132) being fixedly mounted on both sides of the threaded tube (131), and the limiting plates (132) being located inside a limiting groove (83) near the top, and a top cover (133) being fixedly mounted on the top of the threaded tube (131), and a rubber ring (134) being fixedly mounted on the outside of the top cover (133).

8. The wastewater filtering and sewage discharge device for a sedimentation tank according to claim 7, characterized in that: The sewage discharge assembly (14) further comprises a threaded seat (141), the threaded seat (141) being threadedly mounted on the outer side of the bidirectional screw rod (111), and the threaded seat (141) being located on the inner side of a placement groove (82) near the bottom of the hollow seat (81), a plurality of L-plates (142) being fixedly mounted on the outer side of the threaded seat (141), and other limiting plates (132) being fixedly mounted on both sides of the threaded portion of the threaded seat (141), and the limiting plates (132) being located on the inner side of the limiting groove (83) near the bottom, and one end of the L-plate (142) away from the threaded seat (141) being fixedly connected to the bottom of the movable tank (143), and the movable tank (143) being in an open upward state, and the outer side of the movable tank (143) being in sealing contact with the inner wall of the impurity removal tank (1) via a sealing ring (145).

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