Aeration grating for sewage treatment

Abstract

The utility model relates to the field of sewage treatment, and discloses an aeration grating for sewage treatment, which comprises an aeration sedimentation tank and a grating machine arranged in the aeration sedimentation tank, the rake teeth are driven by the chain wheel, movable tooth parts are rotationally arranged on the rake teeth, the movable tooth parts are driven to swing so as to shake off impurities, and in a default state, the included angle between the movable tooth parts and the rake teeth is 180 degrees; the aeration pipe is arranged on the inner wall of the aeration sedimentation tank, and a nozzle of the aeration pipe faces the grillage machine. According to the aeration grid for sewage treatment, the air injection direction of the aeration pipe is opposite to the water inlet direction, so that small backflow of inlet water occurs, the time of sewage in the aeration sedimentation tank is prolonged, the sewage repeatedly passes through the grid machine, and meanwhile, the movable tooth part swings and shakes off dirt hooked on the movable tooth part, so that the dirt falls into the slag groove, and the sewage treatment effect is improved. The self-cleaning effect is achieved, and the cleaning mode does not affect the transmission chain wheel.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to an aeration grid for sewage treatment. Background Art

[0002] Aeration grids for sewage treatment are used to perform preliminary screening and aeration treatment on wastewater entering the sewage treatment system. Usually, the grid screening device is combined with an aeration sedimentation tank to effectively treat sewage impurities.

[0003] In conjunction with publication number CN108553986B, publication date 2020-08-07, a screen for sewage treatment is disclosed.

[0004] In the prior art including the above patent, there are a first mounting plate, a second mounting plate, a third mounting plate, a driving mechanism, a transmission belt, a grid plate, a driven mechanism, a collecting tank, a collecting frame, a discharge port, a baffle, a first fixing mechanism, a transmission mechanism and a knocking mechanism. In the above technology, the knocking mechanism is driven by the transmission mechanism to knock the transmission belt, so that the grid plate on the transmission belt vibrates and shakes off the debris, but long-term knocking will change the tension of the transmission belt, so that the service life of the transmission belt is reduced. Utility Model Content

[0005] The purpose of the utility model is to provide an aeration grid for sewage treatment, which is used to solve the above problems.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: an aeration grille for sewage treatment, comprising an aeration sedimentation tank and a grille machine arranged therein;

[0007] The rake teeth are driven by the sprocket, and the rake teeth are rotatably provided with movable teeth, and the movable teeth are driven to swing to shake off impurities. In the default state, the angle between the movable teeth and the rake teeth is 180°;

[0008] The aeration pipe is arranged on the inner wall of the aeration sedimentation tank, and the nozzle of the aeration pipe faces the grid machine.

[0009] Preferably, a pulling portion is provided at the first end of the rake tooth, and a lower fork tooth is provided at the second end opposite thereto, and through holes for fixing and inserting a pin shaft are provided on the pulling portion and the lower fork tooth, and the axis of the rotating shaft of the movable tooth portion is consistent with the axis of the through hole on the lower fork tooth.

[0010] Preferably, the pulling portion and the movable tooth portion are elastically connected via an elastic member, and the elastic member is in a stretched state in a default state.

[0011] Preferably, a pin rod is fixedly provided on the movable tooth portion, and a guide groove for guiding the pin rod is provided on the lower fork tooth, and the guide groove includes a retention groove and an arc-shaped groove.

[0012] Preferably, the grille machine is provided with a reset device for driving the movable teeth to return to a default state, and the reset device comprises:

[0013] A first guide slide block fixedly arranged on the top of the inner wall of the grille machine;

[0014] A second guide slide block is fixedly arranged at the bottom end of the inner wall of the grille machine.

[0015] Preferably, a cleaning mechanism is provided at the top of the grill machine, and the cleaning mechanism includes bristles, and the bristles are arranged on the first guide sliding block.

[0016] Preferably, a lower groove is provided at the bottom of the aeration sedimentation tank, and the bottom end of the screen machine is located in the lower groove.

[0017] Preferably, a bottom cleaning mechanism is provided in the lower groove, and the bottom cleaning mechanism comprises a rotatable movable roller, and a debris removal tooth for scraping the bottom of the lower groove is fixedly provided along a circumferential array on the movable roller, and the movable roller is driven to rotate.

[0018] Preferably, the rotation direction of the movable roller is opposite to the transmission direction of the sprocket wheel.

[0019] In the above technical scheme, the utility model provides an aeration screen for sewage treatment, which has the following beneficial effects: the jet direction of the aeration pipe is opposite to the water inlet direction, so that a small backflow occurs in the inlet water, which prolongs the time of sewage in the aeration sedimentation tank and allows the sewage to repeatedly pass through the screen machine. At the same time, the movable teeth swing and shake off the dirt hooked on it, so that the dirt falls into the slag trough, achieving a self-cleaning effect, and this cleaning method will not affect the transmission sprocket. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0021] Figure 1 An overall three-dimensional schematic diagram provided for an embodiment of the utility model;

[0022] Figure 2 A schematic diagram of the lower groove and bottom cleaning mechanism provided by an embodiment of the utility model;

[0023] Figure 3 A schematic diagram of a rake tooth connection method provided in an embodiment of the utility model;

[0024] Figure 4 A schematic diagram of the rake tooth structure provided in an embodiment of the utility model;

[0025] Figure 5 The embodiment of the utility model provides Figure 2 Middle A is an enlarged schematic diagram;

[0026] Figure 6 A schematic diagram of the contact state between the transmission roller and the rake teeth provided in an embodiment of the utility model;

[0027] Figure 7 A schematic diagram of a debris removal tooth provided in an embodiment of the utility model.

[0028] Description of reference numerals:

[0029] 1. Screen machine; 11. Rake teeth; 111. Pulling part; 112. Lower fork teeth; 113. Guide slide groove; 12. Movable tooth part; 2. Aeration pipe; 3. Lower groove; 4. First guide slide block; 41. Brush; 5. Second guide slide block; 6. Movable roller; 61. De-dusting teeth. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0031] like Figure 1-7 As shown, an aeration grid for sewage treatment includes an aeration sedimentation tank and a grid machine 1 arranged therein;

[0032] The rake teeth 11 are driven by the sprocket, and the rake teeth 11 are rotatably provided with movable tooth portions 12, and the movable tooth portions 12 are driven to swing to shake off impurities. In a default state, the angle between the movable tooth portions 12 and the rake teeth 11 is 180°;

[0033] The aeration pipe 2 is arranged on the inner wall of the aeration sedimentation tank, and the nozzle of the aeration pipe 2 faces the screen machine 1.

[0034] Specifically, the rake teeth 11 are arranged in a linear array on the pin shaft of the sprocket in a horizontal direction in groups of two, and the two rake teeth 11 in a group are staggered with each other, and the screen machine 1 is arranged toward the water inlet direction.

[0035] Furthermore, the screen machine 1 is started, and the rake teeth 11 are driven by the sprocket to circulate from bottom to top, and the movable tooth portion 12 picks up the dirt in the pool, and the nozzle of the aeration pipe 2 is directed toward the screen machine 1. Compared with the traditional aeration pipe 2 arranged on the side of the water flow direction, the aeration pipe 2 makes the jet direction opposite to the water inlet direction, and the water inlet has a small vortex, which prolongs the time of sewage in the aeration sedimentation tank and makes the sewage pass through repeatedly, which cooperates better with the screen machine 1; in the default state, the rake teeth 11 are driven from bottom to top, and the movable tooth portion 12 picks up the dirt in the pool, and the nozzle of the aeration pipe 2 is directed toward the screen machine 1. 12 is pulled upward by the rake teeth 11 to move along the transmission path of the sprocket. The rake teeth 11 are provided with guide grooves 113 to limit the rotation trajectory of the movable tooth portion 12. At this time, the angle between the movable tooth portion 12 and the rake teeth 11 is 180°. The movable tooth portion 12 and the adjacent rake teeth 11 form a grid facing the water inlet direction to intercept dirt. When the rake teeth 11 run to the top of the grid machine 1, they contact the sprocket drive roller, and then the movable tooth portion 12 swings and shakes off the dirt hooked on it, so that the dirt falls into the slag trough.

[0036] In the above technology, the jet direction of the aeration pipe 2 is opposite to the water inlet direction, so that a small vortex occurs in the inlet water, which prolongs the time of sewage in the aeration sedimentation tank and allows the sewage to repeatedly pass through the screen machine 1. At the same time, the movable tooth portion 12 swings and shakes off the dirt hooked on it, so that the dirt falls into the slag trough, achieving a self-cleaning effect, and this cleaning method will not affect the transmission sprocket.

[0037] As an embodiment further provided by the present invention, a pulling portion 111 is provided at the first end of the rake tooth 11, and a lower fork tooth 112 is provided at the second end opposite thereto, and through holes for fixing and plugging a pin shaft are provided on the pulling portion 111 and the lower fork tooth 112, and the axis of the rotating shaft of the movable tooth portion 12 is consistent with the axis of the through hole on the lower fork tooth 112.

[0038] Specifically, in the default state, the centers of gravity of the lower fork teeth 112, the pulling portion 111, and the movable tooth portion 12 are colinear. When the rake teeth 11 move to a position close to the sprocket drive roller, since the drive roller is a circular structure, multiple rake teeth 11 are circumferentially arrayed on the outer periphery of the drive roller, and the movable tooth portion 12 swings when passing the drive roller. At this time, an angle appears between the movable tooth portion 12 and the lower fork teeth 112, and the movable tooth portion 12 and the lower fork teeth 112 extend out of the grid formed by adjacent rake teeth 11, so that the dirt stuck between two adjacent rake teeth 11 is hooked out by the movable tooth portion 12 and the lower fork teeth 112, avoiding blockage of the grid.

[0039] As another embodiment further provided by the present invention, the pulling portion 111 is elastically connected to the movable tooth portion 12 via an elastic member, and the elastic member is in a stretched state in a default state.

[0040] Specifically, since the axis of the rotating shaft of the movable tooth portion 12 is consistent with the axis of the through hole on the lower fork tooth 112, and the two rake teeth 11 are staggered, the pulling portion 111 of the rake tooth 11 is elastically connected to the movable tooth portion 12 rotatably connected on the other rake tooth 11 through an elastic member. In the default state, the angle between the rake tooth 11 and the movable tooth portion 12 is 180°. At this time, the pulling portion 111 and the movable tooth portion 12 are respectively located at the two ends of the elastic member in the stretched state. A hole can be opened on the rotating shaft corresponding to the movable tooth portion 12 to accommodate the elastic member, or a specially shaped elastic member can be used to allow the elastic member to move along the pulling portion 111 and the movable tooth portion 12. The center of gravity line of the two extends, and the rotating shaft is also located on the center of gravity line of the two. At this time, due to the influence of elastic potential energy, the two ends of the elastic member approach each other along the center of gravity line, the pulling portion 111 exerts a force on the rotating shaft, and the movable tooth portion 12 exerts a force on the rotating shaft. At the same time, the reaction force of the rotating shaft and the elastic potential energy are offset. The pulling portion 111 and the movable tooth portion 12 maintain an angle of 180 degrees. Once the pulling portion 111 contacts the outer periphery of the transmission roller and moves along the outer periphery of the transmission roller, an angle appears between it and the movable tooth portion 12, which changes the direction of the elastic potential energy and no longer points to the rotating shaft. The movable tooth portion 12 will be driven by the elastic member to swing close to the pulling portion 111.

[0041] As another embodiment further provided by the present invention, a pin rod is fixedly provided on the movable tooth portion 12, and a guide groove 113 for guiding the pin rod is provided on the lower fork tooth 112, and the guide groove 113 includes a retention groove and an arc-shaped groove.

[0042] Specifically, in the default state, the elastic member is in a stretched state, and the movable tooth portion 12 and the pulling portion 111 tend to approach each other, but the pin rod is located in the retention groove, which limits the position of the movable tooth portion 12. Only when the pulling portion 111 contacts the outer periphery of the transmission roller and moves along the outer periphery of the transmission roller, an angle appears between the pin rod and the movable tooth portion 12, and the pin rod slides out of the retention groove to the arc-shaped slide groove, no longer limiting the position of the movable tooth portion 12. The movable tooth portion 12 is driven by the elastic member to swing close to the pulling portion 111.

[0043] As another embodiment further provided by the present invention, the grill machine 1 is provided with a reset device for driving the movable tooth portion 12 to return to a default state, and the reset device includes:

[0044] A first guide slide block 4 fixedly arranged on the top of the inner wall of the grill machine 1;

[0045] A second guide slide block 5 is fixedly arranged at the bottom end of the inner wall of the grill machine 1 .

[0046] Specifically, the relative positions of the first guide slide 4 and the second guide slide 5 and the rake teeth 11 are as follows: Figure 6As shown, when the movable tooth portion 12 moves to the corresponding position after swinging, the movable tooth portion 12 will slide with the outer wall of the first guide slider 4 or the second guide slider 5 and be pushed, so that the movable tooth portion 12 swings back to the default state again.

[0047] As another embodiment further provided by the present invention, a cleaning mechanism is provided at the top of the grill machine 1 , and the cleaning mechanism includes bristles 41 , and the bristles 41 are arranged on the first guide sliding block 4 .

[0048] Specifically, the contact surface between the first guide slider 4 and the movable tooth portion 12 is an inclined surface, so that the movable tooth portion 12 swings, and at the same time, the two sides of the movable tooth portion 12 are cleaned by the bristles 41 to avoid dirt residue.

[0049] As another embodiment further provided by the present invention, a lower groove 3 is provided at the bottom of the aeration sedimentation tank, and the bottom end of the screen machine 1 is located in the lower groove 3 .

[0050] Specifically, since the jet direction of the aeration pipe 2 is consistent with the water inlet direction, the water flow is decelerated, so that the impurities in the sewage are naturally settled. The settled impurities are gathered by setting the lower groove 3, and the lower groove 3 is cleaned by the bottom cleaning mechanism set in the lower groove 3. The movable roller 6 can be driven by a motor to drive the impurity removal teeth 61 fixedly set in the circumferential array along the upper edge to rotate, or the movable roller 6 can be driven to rotate by water pressure by setting an impeller, so that the impurity removal teeth 61 scrape the bottom of the lower groove 3.

[0051] As another embodiment further provided by the present invention, the rotation direction of the movable roller 6 is opposite to the transmission direction of the sprocket wheel.

[0052] Specifically, the friction force of the movable roller 6 is small, so that the debris removal teeth 61 will not drive the movable tooth portion 12 to swing. The debris removal teeth 61 are a comb-tooth structure, such as Figure 7 As shown, the movable tooth portion 12 can be abutted against the movable tooth portion 12 during the rotation. Since the movable tooth portion 12 is staggered, if the protruding portion in the comb teeth contacts the movable tooth portion 12, it will be abutted against the movable tooth portion 12, so that the debris removal teeth 61 drive the movable roller 6 to rotate, and the concave portion in the comb teeth will not block the movable tooth portion 12, but the debris removal teeth 61 will intercept impurities in the sewage, and the movable tooth portion 12 will take away the impurities when passing through the concave portion of the comb teeth.

[0053] Working principle: Start the screen machine 1, the rake teeth 11 are driven by the sprocket to circulate from bottom to top, the movable tooth part 12 picks up the dirt in the pool, and the nozzle of the aeration pipe 2 faces the screen machine 1. Compared with the traditional aeration pipe 2 arranged on the side of the water flow direction, the aeration pipe 2 makes the jet direction opposite to the water inlet direction, and the water inlet has a small vortex, which prolongs the time of sewage in the aeration sedimentation tank and makes the sewage pass through repeatedly, which cooperates better with the screen machine 1; in the default state, the rake teeth 11 are driven from bottom to top, and the movable tooth part 12 is pulled upward by the rake teeth 11 to move along the transmission path of the sprocket. The rake teeth 11 are provided with guide grooves 113 to The rotation trajectory of the movable tooth portion 12 is limited. At this time, the angle between the movable tooth portion 12 and the rake teeth 11 is 180°. The movable tooth portion 12 and the adjacent rake teeth 11 form a grid facing the water inlet direction to intercept dirt. When the rake teeth 11 move to a position close to the sprocket drive roller, since the drive roller is a circular structure, multiple rake teeth 11 are circumferentially arrayed on the outer periphery of the drive roller. The movable tooth portion 12 swings when passing the drive roller. At this time, an angle appears between the movable tooth portion 12 and the lower fork teeth 112. The movable tooth portion 12 and the lower fork teeth 112 extend out of the grid formed by the adjacent rake teeth 11, so that the dirt is stuck between two adjacent rake teeth 11. The dirt is hooked out by the movable tooth portion 12 and the lower fork tooth 112. At the same time, when the pulling portion 111 contacts the outer periphery of the transmission roller and moves along the outer periphery of the transmission roller, an angle appears between the movable tooth portion 12 and the pin rod, and the pin rod slides out of the retention groove to the arc-shaped slide groove, and no longer limits the position of the movable tooth portion 12. The movable tooth portion 12 is driven by the elastic member to swing close to the pulling portion 111, and the movable tooth portion 12 swings and shakes off the dirt hooked thereon, so that the dirt falls into the slag trough. When the movable tooth portion 12 moves to the corresponding position after the swing, the movable tooth portion 12 will slide with the outer wall of the first guide slider 4 and be pushed, so that the movable tooth portion 12 can move to the corresponding position. It swings back to the default state for the second time, and at the same time, the bristles 41 are used to clean both sides of the movable tooth portion 12 to prevent dirt from remaining. When the movable tooth portion 12 passes through the transmission roller again, it starts to swing to hook the impurities in the lower groove 3. Then, since the movable tooth portion 12 is staggered, if the protruding part of the comb teeth contacts the movable tooth portion 12, it will be resisted by the movable tooth portion 12, so that the impurity removal teeth 61 drive the movable roller 6 to rotate, and the concave part of the comb teeth will not block the movable tooth portion 12, but the impurity removal teeth 61 will intercept the impurities in the sewage, and the movable tooth portion 12 will take away the impurities when passing through the concave part of the comb teeth.

[0054] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An aeration grid for sewage treatment, characterized in that: It comprises an aeration sedimentation tank and a screen machine (1) arranged therein; A rake tooth (11) driven by a sprocket wheel, and a movable tooth portion (12) is rotatably provided on the rake tooth (11), the movable tooth portion (12) is driven to swing to shake off impurities, and in a default state, the angle between the movable tooth portion (12) and the rake tooth (11) is 180°; An aeration pipe (2) is arranged on the inner wall of the aeration sedimentation tank, and a nozzle of the aeration pipe (2) faces the grid machine (1).

2. The aeration grid for sewage treatment according to claim 1, characterized in that: The first end of the rake tooth (11) is provided with a pulling portion (111), and the second end opposite thereto is provided with a lower fork tooth (112), and both the pulling portion (111) and the lower fork tooth (112) are provided with through holes for fixing and plugging a pin shaft, and the axis of the rotating shaft of the movable tooth portion (12) is consistent with the axis of the through hole on the lower fork tooth (112).

3. The aeration grid for sewage treatment according to claim 2, characterized in that: The pulling portion (111) and the movable tooth portion (12) are elastically connected via an elastic member, and the elastic member is in a stretched state in a default state.

4. The aeration grid for sewage treatment according to claim 3, characterized in that: A pin rod is fixedly arranged on the movable tooth portion (12), and a guide groove (113) for guiding the pin rod is provided on the lower fork tooth (112), wherein the guide groove (113) comprises a retention groove and an arc-shaped groove.

5. The aeration grid for sewage treatment according to claim 1, characterized in that: The grill machine (1) is provided with a reset device for driving the movable tooth portion (12) to return to a default state, the reset device comprising: A first guide slide block (4) fixedly arranged on the top end of the inner wall of the grill machine (1); A second guide sliding block (5) is fixedly arranged at the bottom end of the inner wall of the grill machine (1).

6. The aeration grid for sewage treatment according to claim 5, characterized in that: The top of the grille machine (1) is provided with a cleaning mechanism, the cleaning mechanism comprising bristles (41), and the bristles (41) are arranged on the first guide slide block (4).

7. The aeration grid for sewage treatment according to claim 1, characterized in that: A lower groove (3) is provided at the bottom of the aeration sedimentation tank, and the bottom end of the screen machine (1) is located in the lower groove (3).

8. The aeration grid for sewage treatment according to claim 7, characterized in that: A bottom cleaning mechanism is arranged in the lower groove (3), the bottom cleaning mechanism comprising a rotatably arranged movable roller (6), and impurity-removing teeth (61) for scraping the bottom of the lower groove (3) are fixedly arranged in a circumferential array on the movable roller (6), and the movable roller (6) is driven to rotate.

9. The aeration grid for sewage treatment according to claim 8, characterized in that: The rotation direction of the movable roller (6) is opposite to the transmission direction of the sprocket wheel.

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