Sewage treatment coarse screen

Abstract

The utility model belongs to the technical field of sewage treatment coarse grids, and particularly relates to a sewage treatment coarse grid which comprises a coarse grid body, a rotating shaft is rotatably mounted in the coarse grid body, and a plurality of rectangular plates are fixedly mounted on the circumferential side wall of the rotating shaft; the collecting frame is arranged in the coarse screen body and located above the rectangular plate, a sliding frame is installed in the collecting frame in a sliding mode, and a filter screen is fixedly installed on the sliding frame; and the two rotating columns are rotationally installed in the coarse screen body and located below the collecting frame, the two rotating columns make contact with the bottom of the filter screen, and a power cavity is formed in the coarse screen body and located at one end of each rotating column. Sewage in the collecting frame can be shaken off into a water pool through the filter screen, it is ensured that garbage in the collecting frame does not contain too much water, meanwhile, the collecting frame is convenient to disassemble and assemble, the garbage in the collecting frame can be taken out, operation is easy, and tools are not needed.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewage treatment coarse grids, and particularly relates to a sewage treatment coarse grid. Background Technique

[0002] The sewage treatment coarse grid is an important part of the sewage treatment process, mainly used to intercept large floating objects and suspended matters in the sewage to reduce the burden of subsequent treatment processes.

[0003] For example, the Chinese patent with the publication number CN217780783U discloses a shock-resistant and corrosion-proof coarse grid, belonging to the technical field of sewage treatment, including a base. A circular groove is opened at the top of the base, and a driving mechanism is arranged inside the circular groove. The top of the base is fixedly connected with a mounting plate and a coarse grid body. A support column is fixedly connected to the top of the mounting plate. A storage box is arranged on one side of the support column. A mounting column is fixedly connected to the inner side surface of the mounting plate. The coarse grid body is arranged between the mounting columns. The top end of the coarse grid body is fixedly connected with an arc-shaped grid. By setting a rake body, rake teeth, and a storage box, the rake teeth convey the large suspended matters and impurities blocked on one side of the coarse grid body from the bottom of the coarse grid to the storage box, so that the coarse grid body will not be blocked during the sewage treatment process, thereby making the sewage treatment effect better. Further, it prevents the coarse grid body from being damaged due to the increase in sewage pressure caused by blockage, and effectively extends the service life of the coarse grid device.

[0004] The above patent has the following problems:

[0005] When the above patent is in use, there are some disadvantages. For example, during the operation of the above device, the intercepted garbage will be sent into the storage box. If a large amount of sewage accumulates in the storage box for a long time, it will not only increase the weight of the garbage, making it more laborious for the staff to dump the garbage, but also may cause environmental pollution due to sewage overflow. At the same time, the storage box of the above device is not convenient to disassemble, and the difficulty of disassembly will exacerbate the difficulty of dumping the garbage, prolong the operation time, and affect the work efficiency. In view of this, we propose a sewage treatment coarse grid. Content of the Utility Model

[0006] The purpose of the utility model is to provide a sewage treatment coarse grid to solve the problems put forward in the above background technique.

[0007] In view of this, the utility model provides a sewage treatment coarse grid, including:

[0008] A coarse grid body, a rotating shaft is rotatably installed inside the coarse grid body, and a plurality of rectangular plates are fixedly installed on the circumferential side wall of the rotating shaft;

[0009] A collection box, the collection box is arranged inside the coarse grille body and above the rectangular plate, a sliding box is slidably installed in the collection box, and a filter screen is fixedly installed on the sliding box;

[0010] Two rotating columns, both of the two rotating columns are rotatably installed inside the coarse grille body and below the collection box, both of the two rotating columns are in contact with the bottom of the filter screen, a power cavity is opened inside the coarse grille body and at one end of the rotating column, one end of each of the two rotating columns extends into the power cavity, and a transmission wheel is fixedly installed at one end of each of the two rotating columns, a transmission belt is installed between the two transmission wheels in a transmission manner, and the two rotating columns and the two transmission wheels are all rotatably connected to the power cavity;

[0011] A driving assembly, the driving assembly is located inside the coarse grille body and is used to drive one of the transmission wheels to rotate;

[0012] Two limiting assemblies, both of the two limiting assemblies are located inside the collection box and are used to fix the position of the collection box.

[0013] In this technical solution, first, the coarse grille body conveys the garbage into the collection box. At the same time, the water flow drives several rectangular plates to rotate, and several rectangular plates drive the rotating shaft to rotate. By setting the driving assembly, one of the transmission wheels can be driven to rotate. One of the transmission wheels drives the transmission belt to drive, the transmission belt drives the other transmission wheel to rotate, the two transmission wheels respectively drive the two rotating columns to rotate. When the two rotating columns rotate 90°, the filter screen will be lifted up, and the filter screen drives the sliding box to slide upward in the collection box. When the two transmission wheels rotate 180°, under the action of gravity, the filter screen and the sliding box will slide downward. The continuous shaking can shake the sewage in the collection box through the filter screen into the pool, ensuring that the garbage in the collection box does not contain too much water;

[0014] When it is necessary to take out the garbage in the collection box, through the set limiting assembly, the operator can lift the collection box upward, take out the collection box and then take out the garbage inside. When it is necessary to install the collection box, first put the collection box back into the coarse grille body. Through the set limiting assembly, the position of the collection box can be fixed, which is convenient for disassembling and installing the collection box, and the garbage in the collection box can be taken out, and the operation is simple without using tools.

[0015] In the above technical solution, further, the driving assembly includes:

[0016] The bevel gear three is fixedly installed at one end of one of the transmission wheels. One end of the rotating shaft extends into the power chamber and is fixedly installed with a bevel gear one. A bevel gear two is meshed and installed on one side of each of the bevel gear one and the bevel gear three. The two bevel gear twos are coaxially connected. The bevel gear three, the two bevel gear twos, the bevel gear one, and one end of the rotating shaft are all rotationally connected to the power chamber.

[0017] In this technical solution, first, the coarse grid body conveys the garbage into the collection box. At the same time, the water flow drives several rectangular plates to rotate. The several rectangular plates drive the rotating shaft to rotate. The rotating shaft drives the bevel gear one to rotate. The bevel gear one drives one of the bevel gear twos meshed with it to rotate. One of the bevel gear twos drives the other bevel gear two to rotate. The other bevel gear two drives the bevel gear three meshed with it to rotate. The bevel gear three drives one of the transmission wheels to rotate. One of the transmission wheels drives the transmission belt to drive. The transmission belt drives the other transmission wheel to rotate. The two transmission wheels respectively drive the two rotating columns to rotate. When the two rotating columns rotate 90°, they will lift the filter screen. The filter screen drives the sliding frame to slide upward in the collection box. When the two transmission wheels rotate 180°, under the action of gravity, the filter screen and the sliding frame will slide downward. The continuous shaking can shake the sewage in the collection box through the filter screen into the pool, ensuring that the garbage in the collection box does not contain too much water.

[0018] In the above technical solution, further, the limiting component includes:

[0019] The limiting slot is opened in the collection box. A limiting rod is slidably installed in the limiting slot. One side of the limiting rod penetrates through the limiting slot and extends into the coarse grid body, and one side of the limiting rod is inserted and matched with the coarse grid body. Several springs fixed to the inner wall of the limiting slot are fixedly installed on the other side of the limiting rod.

[0020] In this technical solution, when it is necessary to take out the garbage in the collection box, first pull the two limiting rods to slide and approach each other. At the same time, several springs are compressed and contracted. When both limiting rods are separated from the coarse grid body, the personnel can lift the collection box upward, take out the collection box and then take out the garbage inside it. When it is necessary to install the collection box, first put the collection box back into the coarse grid body, and then release the two limiting rods. Under the action of the rebounding force of several springs, the two limiting rods slide and move away from each other. Then both limiting rods are inserted into the coarse grid body, and the position of the collection box can be fixed, which is convenient for disassembling and installing the collection box, taking out the garbage in the collection box, and the operation is simple without using tools.

[0021] In the above technical solution, further, a pull rod is fixedly installed at one end of the limiting rod. One end of the pull rod penetrates through the limiting slot and extends to the outside, and the pull rod is slidably connected to the limiting slot.

[0022] In this technical solution, the pull rod is provided to facilitate the personnel to pull the limit rod.

[0023] In the above technical solution, further, several of the rectangular plates are distributed at equal intervals, and several of the springs are distributed at equal intervals.

[0024] In this technical solution, it is ensured that the flowing water can drive several rectangular plates to rotate. Under the action of the rebounding force of several springs, the two limit rods slide and move away from each other.

[0025] In the above technical solution, further, the cross-section of the rotating column is elliptical.

[0026] In this technical solution, it is ensured that when the two rotating columns rotate 90°, the filter net will be lifted.

[0027] In the above technical solution, further, the cross-section of the sliding frame is T-shaped.

[0028] In this technical solution, it is ensured that the sliding frame can slide in the collection box.

[0029] The beneficial effects of the present utility model are:

[0030] 1. For this sewage treatment coarse grid, the flowing water drives several rectangular plates to rotate, and several rectangular plates drive the rotating shaft to rotate. Through the provided driving component, one of the transmission wheels can be driven to rotate. One of the transmission wheels drives the transmission belt to drive, and the transmission belt drives the other transmission wheel to rotate. The two transmission wheels respectively drive the two rotating columns to rotate. When the two rotating columns rotate 90°, the filter net will be lifted. The filter net drives the sliding frame to slide upward in the collection box. When the two transmission wheels rotate 180°, under the action of gravity, the filter net and the sliding frame will slide downward. The continuous shaking can shake the sewage in the collection box through the filter net and drop it into the pool, ensuring that the garbage in the collection box does not contain too much water.

[0031] 2. For this sewage treatment coarse grid, when it is necessary to take out the garbage in the collection box, through the provided limit component, the personnel can lift the collection box upward, take out the collection box and then take out the garbage inside it. When it is necessary to install the collection box, first place the collection box back into the main body of the coarse grid. Through the provided limit component, the position of the collection box can be fixed, which is convenient for disassembling and installing the collection box, taking out the garbage in the collection box, and the operation is simple without using tools. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is one of the overall structural schematic diagrams of the present utility model;

[0033] Figure 2 is one of the cross-sectional structural schematic diagrams of the main body of the coarse grid of the present utility model;

[0034] Figure 3 It is the second schematic cross-sectional structure diagram of the coarse grid body of the present utility model;

[0035] Figure 4 It is of the present utility model Figure 3 The enlarged structure diagram at position A in it;

[0036] Figure 5 It is the first schematic cross-sectional structure diagram of the collection box of the present utility model;

[0037] Figure 6 It is the second schematic cross-sectional structure diagram of the collection box of the present utility model;

[0038] Figure 7 It is the second schematic overall structure diagram of the present utility model;

[0039] Figure 8 It is the third schematic cross-sectional structure diagram of the coarse grid body of the present utility model;

[0040] Figure 9 It is the schematic structure diagram of the rotating shaft area of the present utility model.

[0041] The marks in the figure are indicated as:

[0042] 1. Coarse grid body; 2. Rotating shaft; 3. Rectangular plate; 4. Collection box; 5. Sliding box; 6. Filter net; 7. Rotating column; 8. Power cavity; 9. Transmission wheel; 10. Transmission belt; 11. Limit groove; 12. Limit rod; 13. Spring; 14. First bevel gear; 15. Second bevel gear; 16. Third bevel gear; 17. Pull rod. Specific embodiments

[0043] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope protected by the present application.

[0044] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments of the present application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific values should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters in the following drawings denote like items, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0045] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects and are not used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of the same type, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally indicates an "or" relationship between the associated objects before and after.

[0046] It should be noted that in the description of the present application, the orientation or positional relationships indicated by the orientation terms such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom" are usually based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Without contrary explanation, these orientation terms do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the protection scope of the present application; the orientation terms "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0047] It should be noted that in this application, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising such element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of this application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0048] Embodiment 1:

[0049] Please refer to Figure 1 - Figure 9 as shown, this embodiment provides a sewage treatment coarse grid, including:

[0050] A coarse grid body 1, in which a rotating shaft 2 is rotatably installed, and a plurality of rectangular plates 3 are fixedly installed on the circumferential side wall of the rotating shaft 2;

[0051] A collection frame 4, which is arranged in the coarse grid body 1 and above the rectangular plates 3. A sliding frame 5 is slidably installed in the collection frame 4, and a filter screen 6 is fixedly installed on the sliding frame 5;

[0052] Two rotating columns 7, both of which are rotatably installed in the coarse grid body 1 and below the collection frame 4. Both of the two rotating columns 7 are in contact with the bottom of the filter screen 6. A power cavity 8 is opened in the coarse grid body 1 and at one end of the rotating column 7. One end of each of the two rotating columns 7 extends into the power cavity 8, and a transmission wheel 9 is fixedly installed at one end of each of the two rotating columns 7. A transmission belt 10 is installed between the two transmission wheels 9 in a transmission manner. Both of the two rotating columns 7 and the two transmission wheels 9 are rotatably connected to the power cavity 8;

[0053] A driving assembly, which is located in the coarse grid body 1 and is used to drive one of the transmission wheels 9 to rotate;

[0054] Two limiting assemblies, both of which are located in the collection frame 4 and are used to fix the position of the collection frame 4.

[0055] Among them, first, the coarse grid body 1 conveys the garbage into the collection box 4. At the same time, the water flow drives several rectangular plates 3 to rotate, and several rectangular plates 3 drive the rotating shaft 2 to rotate. Through the set driving component, one of the transmission wheels 9 can be driven to rotate. One of the transmission wheels 9 drives the transmission belt 10 to transmit, and the transmission belt 10 drives the other transmission wheel 9 to rotate. The two transmission wheels 9 respectively drive the two rotating columns 7 to rotate. When the two rotating columns 7 rotate 90°, the filter screen 6 will be lifted up. The filter screen 6 drives the sliding frame 5 to slide upward in the collection box 4. When the two transmission wheels 9 rotate 180°, under the action of gravity, the filter screen 6 and the sliding frame 5 will slide downward. The continuous jitter can shake the sewage in the collection box 4 through the filter screen 6 and drop it into the pool, ensuring that the garbage in the collection box 4 does not contain too much water;

[0056] When it is necessary to take out the garbage in the collection box 4, through the set limiting component, the personnel can lift the collection box 4 upward, take out the collection box 4 and then take out the garbage inside it. When it is necessary to install the collection box 4, first place the collection box 4 back into the coarse grid body 1. Through the set limiting component, the position of the collection box 4 can be fixed, which is convenient for disassembling and installing the collection box 4, taking out the garbage in the collection box 4, and the operation is simple without using tools.

[0057] In this embodiment, the driving component includes:

[0058] The third bevel gear 16 is fixedly installed at one end of one of the transmission wheels 9. One end of the rotating shaft 2 extends into the power chamber 8 and is fixedly installed with the first bevel gear 14. The first bevel gear 14 and one side of the third bevel gear 16 are both meshed with the second bevel gear 15. The two second bevel gears 15 are coaxially connected. The third bevel gear 16, the two second bevel gears 15, the first bevel gear 14 and one end of the rotating shaft 2 are all rotationally connected to the power chamber 8;

[0059] Among them, first, the coarse grid body 1 conveys the garbage into the collection box 4. At the same time, the water flow drives several rectangular plates 3 to rotate. The several rectangular plates 3 drive the rotating shaft 2 to rotate. The rotating shaft 2 drives the first bevel gear 14 to rotate. The first bevel gear 14 drives one of the second bevel gears 15 meshing with it to rotate. One of the second bevel gears 15 drives the other second bevel gear 15 to rotate. The other second bevel gear 15 drives the third bevel gear 16 meshing with it to rotate. The third bevel gear 16 drives one of the transmission wheels 9 to rotate. One of the transmission wheels 9 drives the transmission belt 10 to transmit power. The transmission belt 10 drives the other transmission wheel 9 to rotate. The two transmission wheels 9 respectively drive the two rotating columns 7 to rotate. When the two rotating columns 7 rotate 90°, they will lift the filter screen 6. The filter screen 6 drives the sliding frame 5 to slide upward in the collection box 4. When the two transmission wheels 9 rotate 180°, under the action of gravity, the filter screen 6 and the sliding frame 5 will slide downward. The continuous jitter can shake the sewage in the collection box 4 through the filter screen 6 into the pool, ensuring that the garbage in the collection box 4 does not contain too much water.

[0060] In this embodiment, the limiting component includes:

[0061] The limiting groove 11 is opened in the collection box 4. A limiting rod 12 is slidably installed in the limiting groove 11. One side of the limiting rod 12 penetrates through the limiting groove 11 and extends into the coarse grid body 1, and one side of the limiting rod 12 is inserted and matched with the coarse grid body 1. A plurality of springs 13 fixed to the inner wall of the limiting groove 11 are fixedly installed on the other side of the limiting rod 12;

[0062] Among them, when it is necessary to take out the garbage in the collection box 4, first pull the two limiting rods 12 to slide and approach each other. At the same time, the plurality of springs 13 are compressed and contracted. When both of the two limiting rods 12 are separated from the inside of the coarse grid body 1, the personnel can lift the collection box 4 upward, take out the collection box 4 and then take out the garbage inside it. When it is necessary to install the collection box 4, first put the collection box 4 back into the coarse grid body 1, and then release the two limiting rods 12. Under the action of the rebounding force of the plurality of springs 13, the two limiting rods 12 slide and move away from each other. Then, both of the two limiting rods 12 are inserted into the coarse grid body 1, and the position of the collection box 4 can be fixed, which is convenient for disassembling and installing the collection box 4, taking out the garbage in the collection box 4, and the operation is simple without using tools.

[0063] Embodiment 2:

[0064] This embodiment provides a sewage treatment coarse grid. In addition to including the technical solutions of the above embodiment, it also has the following technical features.

[0065] In this embodiment, one end of the limiting rod 12 is fixedly installed with a pull rod 17. One end of the pull rod 17 penetrates through the limiting groove 11 and extends to the outside, and the pull rod 17 is slidably connected to the limiting groove 11.

[0066] Among them, the pull rod 17 is provided to facilitate the personnel to pull the limit rod 12.

[0067] Embodiment 3:

[0068] This embodiment provides a sewage treatment coarse grid. In addition to the technical solutions of the above embodiments, it also has the following technical features.

[0069] In this embodiment, several rectangular plates 3 are evenly distributed, and several springs 13 are evenly distributed.

[0070] Among them, it is ensured that the water flow can drive several rectangular plates 3 to rotate. Under the action of the elastic force of several springs 13, the two limit rods 12 slide and move away from each other.

[0071] Embodiment 4:

[0072] This embodiment provides a sewage treatment coarse grid. In addition to the technical solutions of the above embodiments, it also has the following technical features.

[0073] In this embodiment, the cross-section of the rotating column 7 is elliptical.

[0074] Among them, it is ensured that when the two rotating columns 7 rotate 90°, the filter net 6 will be lifted.

[0075] Embodiment 5:

[0076] This embodiment provides a sewage treatment coarse grid. In addition to the technical solutions of the above embodiments, it also has the following technical features.

[0077] In this embodiment, the cross-section of the sliding frame 5 is T-shaped.

[0078] Among them, it is ensured that the sliding frame 5 can slide in the collection box 4.

[0079] It should be noted that: the height of the rotating shaft 2 is the same as the water surface height, ensuring that the water flow can drive the rotating shaft 2 to rotate through several rectangular plates 3.

[0080] It should be noted that: the structure and principle of intercepting garbage in this embodiment are all prior arts. Specifically, reference can be made to the comparative document (publication number: CN217780783U, patent name: a coarse grid resistant to impact and corrosion), which will not be elaborated here.

[0081] Working principle: First, the coarse grille body 1 conveys the garbage into the collection box 4. At the same time, the water flow drives several rectangular plates 3 to rotate. The several rectangular plates 3 drive the rotating shaft 2 to rotate. The rotating shaft 2 drives the first bevel gear 14 to rotate. The first bevel gear 14 drives one of the second bevel gears 15 meshing with it to rotate. One of the second bevel gears 15 drives the other second bevel gear 15 to rotate. The other second bevel gear 15 drives the third bevel gear 16 meshing with it to rotate. The third bevel gear 16 drives one of the transmission wheels 9 to rotate. One of the transmission wheels 9 drives the transmission belt 10 to transmit power. The transmission belt 10 drives the other transmission wheel 9 to rotate. The two transmission wheels 9 respectively drive the two rotating columns 7 to rotate. When the two rotating columns 7 rotate 90°, they will lift up the filter net 6. The filter net 6 drives the sliding frame 5 to slide upward in the collection box 4. When the two transmission wheels 9 rotate 180°, under the action of gravity, the filter net 6 and the sliding frame 5 will slide downward. The continuous jitter can shake the sewage in the collection box 4 through the filter net 6 and drop it into the pool, ensuring that the garbage in the collection box 4 does not contain too much water;

[0082] When it is necessary to remove the garbage in the collection box 4, first pull the two pull rods 17 to slide and approach each other. The two pull rods 17 respectively drive the two limiting rods 12 to slide and approach each other. At the same time, several springs 13 are compressed and contracted. When both of the two limiting rods 12 are disengaged from the coarse grille body 1, the personnel can lift the collection box 4 upward, take out the garbage inside the collection box 4 after taking out the collection box 4. When it is necessary to install the collection box 4, first place the collection box 4 back into the coarse grille body 1, and then release the two pull rods 17. Under the action of the elastic force of the several springs 13, the two limiting rods 12 slide and move away from each other. Subsequently, both of the two limiting rods 12 are inserted into the coarse grille body 1, and the position of the collection box 4 can be fixed, which is convenient for disassembling and installing the collection box 4, taking out the garbage in the collection box 4, and the operation is simple without using tools.

[0083] The embodiments of the present application are described above in conjunction with the accompanying drawings. Without conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above specific implementation manners. The above specific implementation manners are only illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all belong to the protection scope of the present application.

Claims

1. A sewage treatment coarse grid, characterized in that, Including: A coarse grille body (1), a rotating shaft (2) is rotatably installed in the coarse grille body (1), and a plurality of rectangular plates (3) are fixedly installed on the circumferential side wall of the rotating shaft (2); A collection box (4), the collection box (4) is arranged in the coarse grille body (1) and above the rectangular plates (3), a sliding box (5) is slidably installed in the collection box (4), and a filter screen (6) is fixedly installed on the sliding box (5); Two rotating columns (7), both of the two rotating columns (7) are rotatably installed in the coarse grille body (1) and below the collection box (4), both of the two rotating columns (7) are in contact with the bottom of the filter screen (6), a power cavity (8) is opened in the coarse grille body (1) and at one end of the rotating column (7), one ends of the two rotating columns (7) both extend into the power cavity (8), and a transmission wheel (9) is fixedly installed at one end of each of the two rotating columns (7), a transmission belt (10) is installed between the two transmission wheels (9) in a transmission manner, and the two rotating columns (7) and the two transmission wheels (9) are all rotatably connected to the power cavity (8); A driving assembly, the driving assembly is located in the coarse grille body (1) and is used for driving one of the transmission wheels (9) to rotate; Two limiting assemblies, both of the two limiting assemblies are located in the collection box (4) and are used for fixing the position of the collection box (4).

2. A sewage treatment coarse grid according to claim 1, characterized in that, The driving assembly includes: A third bevel gear (16), the third bevel gear (16) is fixedly installed at one end of one of the transmission wheels (9), one end of the rotating shaft (2) extends into the power cavity (8) and is fixedly installed with a first bevel gear (14), a second bevel gear (15) is meshed and installed on one side of each of the first bevel gear (14) and the third bevel gear (16), the two second bevel gears (15) are coaxially connected, and the third bevel gear (16), the two second bevel gears (15), the first bevel gear (14) and one end of the rotating shaft (2) are all rotatably connected to the power cavity (8).

3. A sewage treatment coarse grid according to claim 2, characterized in that, The limiting assembly includes: A limiting groove (11), the limiting groove (11) is opened in the collection box (4), a limiting rod (12) is slidably installed in the limiting groove (11), one side of the limiting rod (12) penetrates through the limiting groove (11) and extends into the coarse grille body (1), and one side of the limiting rod (12) is inserted and matched with the coarse grille body (1), and a plurality of springs (13) fixed to the inner wall of the limiting groove (11) are fixedly installed on the other side of the limiting rod (12).

4. A sewage treatment coarse grid according to claim 3, characterized in that, One end of the limiting rod (12) is fixedly installed with a pull rod (17), one end of the pull rod (17) penetrates through the limiting groove (11) and extends to the outside, and the pull rod (17) is slidably connected to the limiting groove (11).

5. A sewage treatment coarse grid according to claim 3, characterized in that, A plurality of the rectangular plates (3) are distributed at equal intervals, and a plurality of the springs (13) are distributed at equal intervals.

6. A sewage treatment coarse grid according to claim 1, characterized in that, The cross section of the rotating column (7) is elliptical.

7. A sewage treatment coarse grid according to claim 1, characterized in that, The cross section of the sliding box (5) is T-shaped.

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