Preliminary filter for domestic sewage treatment system

Abstract

The utility model discloses a preliminary filter for a domestic sewage treatment system, which comprises a filter tank main body, a filter tank, a filter tank and a filter tank, the filter screen plate is fixedly installed in the filter box main body, the left side of the filter screen plate is attached to the opening end of the sewage tank, the front side and the rear side of the filter screen plate are connected with the side wall of the filter box main body through water baffles, and the right side of the filter screen plate is attached to the opening end of the slag discharging chamber; the cleaning device comprises a first transmission roller and a second transmission roller which are rotatably arranged on the two sides of the upper surface of the filter screen plate, and a conveying belt is in transmission connection between the first transmission roller and the second transmission roller; a plurality of rubber scrapers are evenly arranged on the conveying belt at intervals, and brushes are arranged on the sides, away from the conveying belt, of the rubber scrapers. The filter box main body is also provided with a driving part for driving the first transmission drum to rotate; the filter screen plate is obliquely arranged upwards from left to right; a scraping plate with a rack is arranged on the top side of the left side wall of the deslagging chamber. The filtering device is simple in structure and convenient to operate, and can be widely applied to sewage treatment.

Description

Technical Field

[0001] The utility model relates to the technical field of filtering devices used in sewage treatment, and in particular to a primary filter used in a domestic sewage treatment system. Background Art

[0002] Sewage treatment equipment can effectively treat urban domestic sewage, industrial wastewater, and other wastewater, preventing sewage and pollutants from flowing directly into water bodies. This equipment is of great significance for improving the ecological environment, enhancing urban quality, and promoting economic development. Sewage contains a large amount of solid impurities. When treating it in a sewage treatment tank, a filter plate is usually installed inside the tank to separate the solid and liquid wastewater for subsequent treatment. However, impurities can easily clog the filter plate during filtration, affecting filtration efficiency and, in turn, overall work efficiency, resulting in poor practicality.

[0003] Chinese utility model patent publication number CN 213285805 U discloses a sewage treatment pool with a blocking function. This utility model relates to the field of sewage treatment technology, and more particularly to a sewage treatment pool with a blocking function, comprising a pool, a sewage pipe fixedly connected to the upper portion of the pool, a filter frame fixedly connected to the middle portion of the pool, a filter screen fixedly connected to the interior of the filter frame, and a chute formed transversely on the upper portion of the filter frame. The technical problem to be solved by the utility model is that, through the coordinated use of components such as a scraper, a brush plate, and a screw, when the sewage treatment pool is in use, when excessive floating debris adheres to the filter screen, the screw can be rotated to drive the brush plate to brush the floating debris off the filter screen, thereby facilitating the cleaning of the filter screen and improving the filtering effect of the filter screen. By coordinating the use of components such as the filter frame, the scraper, and the filter screen, the filter frame is tilted, and most of the garbage on the filter device is flushed to one side of the pool, effectively preventing debris in the sewage from clogging the filter device and improving sewage treatment efficiency. However, this technical solution requires the design of sliders, chute, scraper, arc groove, ball bearings, etc., which are complicated to manufacture and install.

[0004] In view of this, we propose a simple and practical sewage treatment device that prevents filter plates from being blocked. Utility Model Content

[0005] The technical problem to be solved by this application is that impurities in the sewage treatment tank are easily blocked by the filter screen during filtration, affecting the filtration efficiency. The commonly used solutions are relatively complicated.

[0006] In order to solve the above technical problems, the present application provides a preliminary filter for a domestic sewage treatment system, comprising: a filter box main body, a water inlet is provided on the left side, and the water inlet leads to a sewage trough; a filter screen plate is fixedly installed inside the filter box main body, the left side of the filter screen plate is attached to the top of the right side wall of the open end of the sewage trough, the front and rear sides of the filter screen plate are connected to the side wall of the filter box main body through a water baffle, and the right side of the filter screen plate is attached to the top of the left side wall of the open end of the slag discharge chamber; a cleaning device comprises a first transmission roller rotatably arranged on the right side of the upper surface of the filter screen plate and a second transmission roller rotatably arranged on the left side of the upper surface of the filter screen plate, the first transmission roller and the second transmission roller are aligned with the corresponding side surfaces of the filter screen plate; the first transmission roller is aligned in parallel with the second transmission roller, and a conveyor belt is connected therebetween, and the conveyor belt wraps the first transmission roller The movable roller is connected to the outer periphery of the second transmission roller and is connected end to end; a number of parallel and aligned rubber scrapers are evenly spaced on the conveyor belt, and the rubber scrapers are arranged across the front and rear sides of the filter screen plate. A brush is provided on the side of the rubber scraper away from the conveyor belt, and several brushes abut against the filter screen plate when they rotate to the side close to the filter screen plate; the filter box body is also provided with a driving member for driving the first transmission roller to rotate; wherein the filter screen plate is tilted upward from left to right; a scraper with a rack is provided on the top side of the left side wall of the slag discharge chamber, and the scraper is arranged obliquely above the slag discharge chamber, and several brushes contact the rack of the scraper when they rotate to the side close to the scraper; the right side wall of the sewage trough, the filter screen plate, the left side wall of the slag discharge chamber and the inner wall of the filter box body are ringed to form a filtered water chamber, and a water outlet is provided at the lower part of the filtered water chamber, the sewage trough is provided with a first slag discharge port, and the slag discharge chamber is provided with a second slag discharge port.

[0007] According to an embodiment of the present application, the filter mesh plate is a rotary mechanical grille mesh plate, and the rotary mechanical grille mesh plate is a filter plate made of 304 stainless steel.

[0008] According to an embodiment of the present application, the brush is arranged on a brush fixing plate, and the brush fixing plate is fixed to the rubber scraper with glue.

[0009] According to an embodiment of the present application, the driving member includes a motor and a built-in reducer. The motor power is transmitted to the built-in reducer via a coupling, and the built-in reducer is connected to the first transmission roller shaft.

[0010] According to an embodiment of the present application, the first slag discharge port is located at the lower left portion of the front side of the filter box body, and the first slag discharge port is a square slag discharge port with a length of 200 mm and a width of 200 mm.

[0011] According to an embodiment of the present application, the height of the right side wall of the sewage tank is 170 mm.

[0012] According to an embodiment of the present application, the height of the filter box body is 1000 mm and the width is 1500 mm.

[0013] According to an embodiment of the present application, the sewage tank also includes an overflow port and a drain port.

[0014] According to an embodiment of the present application, the water retaining plate is arranged at an angle and is located in the same plane as the filter screen plate.

[0015] According to an embodiment of the present application, the second slag discharge port is located at the lower right side of the filter box body. The second slag discharge port is a square slag discharge port with a length of 500 mm and a width of 500 mm. The second slag discharge port is connected to the slag receiving bucket through a pipe.

[0016] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0017] 1. The present application adopts a transmission roller device driven by a motor, so that the scraper device installed on the conveyor belt driven by the roller cleans the filter screen reciprocally, so that the dust, impurities, etc. on the filter screen can be cleaned by the brush, which is beneficial to improving the filtering efficiency, reducing the difficulty of cleaning the filter screen, reducing the need for high-altitude operations when manually disassembling and cleaning the filter screen, and reducing the danger of cleaning the filter screen.

[0018] 2. This application sets the filter screen at an angle so that when the water from the sewage pipe rushes over, most of the garbage on the filter device will be flushed to one side of the sewage tank, effectively preventing the debris in the sewage from clogging the filter device and improving the sewage treatment efficiency.

[0019] 3. A toothed scraper is provided at the entrance of the slag discharge chamber to scrape off impurities adhering to the brush of the rubber scraper, which is conducive to cleaning the filter more conveniently and extending the service life of the entire cleaning device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only relate to some embodiments of the present application, and are not limitations to the present application.

[0021] Figure 1 This is a schematic diagram of the internal structure of a primary filter for a domestic sewage treatment system according to an example of the present invention, viewed from the front;

[0022] Figure 2 This is a schematic diagram of the internal structure of a primary filter used in a domestic sewage treatment system as an example of the present invention, viewed from a top view.

[0023] The following are the descriptions of the reference numerals:

[0024] 10. Filter box body, 11. Water inlet, 12. First slag discharge port, 13. Second slag discharge port, 20. Sewage trough, 21. Right side wall, 30. Cleaning device, 31. First transmission roller, 32. Second transmission roller, 33. Rubber scraper, 34. Conveyor belt, 35. Driving element, 40. Slag discharge chamber, 41. Left side wall, 42. Scraper with rack, 50. Filter water chamber. DETAILED DESCRIPTION

[0025] To make the purpose, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0026] Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by persons of ordinary skill in the art to which this application belongs. The terms "first," "second," and similar expressions used in this patent specification and claims do not denote any order, quantity, or importance, but are merely used to distinguish different components. Similarly, terms such as "a" or "an" do not denote a limitation of quantity, but rather denote the presence of at least one.

[0027] like Figures 1 to 2 As shown, the example of the present invention is a preliminary filter for a domestic sewage treatment system, comprising a filter box body 10, a filter screen and a cleaning device 30. Compared with the prior art, the filter screen needs to be pulled out of the sewage treatment device after the filter screen has filtered the sewage. During long-term use, the staff needs to repeatedly pull the filter screen out of the device for cleaning. This method increases the workload of the staff and brings great inconvenience to the staff. The present application allows impurities on the filter screen to be repeatedly and automatically cleaned by a brush, which is beneficial to reducing the difficulty of cleaning the filter screen and the workload of manually disassembling and cleaning the filter screen.

[0028] In this embodiment, the filter box body 10 is a rectangular body, and a water inlet 11 is provided on the left side thereof. The water inlet 11 leads to the sewage tank 20 .

[0029] Specifically, the filter box body 10 can be made of 304 stainless steel, which is low in cost. The filter box body 10 can be 1000 mm in height and 1500 mm in width.

[0030] In this embodiment, the filter screen is fixedly installed inside the filter box body 10, the left side of the filter screen is attached to the top of the right side wall 21 of the open end of the sewage tank 20, the front and rear sides of the filter screen are connected to the side wall of the filter box body 10 through the water baffle, and the right side of the filter screen is attached to the top of the left side wall 41 of the open end of the slag discharge chamber 40.

[0031] Specifically, the filter screen plate can be preferably a rotary mechanical grille screen plate, which is a filter plate made of 304 stainless steel. The filter screen plate has a filter mesh diameter of 5 mm.

[0032] Specifically, the filter screen is tilted upward from left to right, with its upper surface facing the direction of the sewage source. This tilted arrangement allows water from the sewage pipe to flush most of the debris on the filter device to one side of the sewage tank 20, effectively preventing debris in the sewage from clogging the filter device and improving sewage treatment efficiency.

[0033] Specifically, the water retaining plate is tilted and located in the same plane as the filter screen plate. The water retaining plate is provided to facilitate the treatment of impurities at the edge of the filter screen plate and to facilitate the installation of the filter screen plate.

[0034] Specifically, the sewage trough 20 is provided with a first slag discharge port 12, located on the lower left side of the front side of the filter box body 10, to facilitate the disposal of settled waste. The first slag discharge port 12 is a square slag discharge port, 200 mm long and 200 mm wide. The right side wall 21 of the sewage trough 20 is 170 mm high and also includes an overflow port and a drain port.

[0035] Specifically, the slag discharge chamber 40 is provided with a second slag discharge port 13, which is located at the lower part of the right side of the filter box body 10. The second slag discharge port 13 is a square slag discharge port with a length of 500 mm and a width of 500 mm. The second slag discharge port 13 can be connected to the slag receiving bucket through a pipe.

[0036] In this embodiment, the cleaning device 30 includes a first transmission roller rotatably arranged on the right side of the upper surface of the filter screen plate and a second transmission roller rotatably arranged on the left side of the upper surface of the filter screen plate. The first transmission roller and the second transmission roller 32 are aligned with the corresponding sides of the filter screen plate; the first transmission roller and the second transmission roller 32 are aligned in parallel, and a conveyor belt 34 is connected between the two, and the conveyor belt 34 wraps the outer periphery of the first transmission roller and the second transmission roller 32 and is connected end to end; a number of parallel and aligned rubber scrapers 33 are evenly spaced on the conveyor belt 34, and the rubber scrapers 33 are arranged across the front and rear sides of the filter screen plate. A brush is provided on the side of the rubber scraper 33 away from the conveyor belt 34, and when the brushes rotate to the side close to the filter screen plate, they abut against the filter screen plate; the filter box body 10 is also provided with a driving member 35 for driving the first transmission roller 31 to rotate.

[0037] Specifically, a scraper with racks is installed on the top side of the left side wall 41 of the slag discharge chamber. The scraper is positioned obliquely upward from the slag discharge chamber 40. When the brushes rotate to the side closest to the scraper, they come into contact with the scraper's racks. This rack-mounted scraper arrangement allows the rubber scraper 33 to clean the filter screen, removing any impurities stuck to the brushes and preventing them from falling off. This helps maintain the cleaning efficiency of the cleaning device 30, ensuring that all removed impurities fall into the slag discharge chamber 40 for collection and disposal.

[0038] Specifically, the brush is arranged on a brush fixing plate, and the brush fixing plate is glued to the rubber scraper 33. The scraper plus the brush forms a plate brush effect, which is conducive to scraping off impurities adhering to the surface of the filter screen plate and the filter holes when sliding on the filter screen plate.

[0039] Specifically, the driving member 35 includes a motor and a built-in reducer. The motor power is transmitted to the built-in reducer through a coupling. The built-in reducer is connected to the first transmission roller shaft. Figure 2 As shown, the driving member 35 can be installed on the rear side of the filter box body 10.

[0040] In this embodiment, Figure 1 As shown, the right side wall 21 of the sewage tank 20, the filter screen, the left side wall 41 of the slag discharge chamber and the inner wall of the filter box body 10 are combined to form a filtered water chamber 50. The water filtered by the filter screen enters the filtered water chamber 50, and a water outlet is provided at the bottom of the filtered water chamber 50.

[0041] The implementation principle of a preliminary filter for a domestic sewage treatment system in the embodiment of the present application is as follows: when the preliminary filter is filtering garbage and other debris flowing out of the water inlet 11 of the sewage, the filter screen is tilted so that most of the garbage in the sewage is cleaned to the bottom side of the sewage tank 20, that is, the left side of the filter plate, under the impact of the water flow inside the sewage tank 20, effectively avoiding the debris in the sewage from clogging the filter device and improving the sewage treatment efficiency. During long-term use, some smaller floating objects and other impurities are easily accumulated on the surface of the filter screen, affecting the filtering effect of the filter screen. At this time, the driving member 35 is started to drive the first transmission roller 31 to rotate. The second driving roller starts to rotate, and the rubber scraper 33 with a brush on the conveyor belt 34 starts to move along the upper surface of the filter screen plate. As the rubber scraper 33 moves, the remaining garbage on the filter screen plate is scraped to the top of the right side of the filter screen plate, and is swept into the slag discharge chamber 40 as the scraper moves. At the same time, the scraper with a rack fixed at the open end of the slag discharge chamber 40 cleans up floating objects and other debris adhered to the brush of the rubber scraper 33. Finally, as the motor rotates, several rubber scrapers 33 can repeatedly clean the garbage on the filter screen plate, so that the garbage on the filter screen plate can be easily removed. The operation is simple and convenient, and the filtering effect of the filter screen plate is improved.

[0042] In summary, the technical solution of this application has the following beneficial effects:

[0043] 1. The present application adopts a transmission roller device driven by a motor, so that the scraper device installed on the conveyor belt driven by the roller cleans the filter screen reciprocally, so that the dust, impurities, etc. on the filter screen can be cleaned by the brush, which is beneficial to improving the filtering efficiency, reducing the difficulty of cleaning the filter screen, reducing the need for high-altitude operations when manually disassembling and cleaning the filter screen, and reducing the danger of cleaning the filter screen.

[0044] 2. This application sets the filter screen at an angle so that when the water from the sewage pipe rushes over, most of the garbage on the filter device will be flushed to one side of the sewage tank, effectively preventing the debris in the sewage from clogging the filter device and improving the sewage treatment efficiency.

[0045] 3. A toothed scraper is provided at the entrance of the slag discharge chamber to scrape off impurities adhering to the brush of the rubber scraper, which is conducive to cleaning the filter more conveniently and extending the service life of the entire cleaning device.

[0046] The above are merely exemplary embodiments of the present application and are not intended to limit the scope of protection of the present application. The scope of protection of the present application is determined by the appended claims.

Claims

1. A primary filter for a domestic sewage treatment system, characterized in that: include: The filter box body has a water inlet on the left side, and the water inlet leads to the sewage tank; A filter screen plate is fixedly installed inside the filter box body, with the left side of the filter screen plate being attached to the top of the right side wall of the open end of the sewage tank, the front and rear sides of the filter screen plate are connected to the side wall of the filter box body through a water retaining plate, and the right side of the filter screen plate is attached to the top of the left side wall of the open end of the slag discharge chamber; The cleaning device comprises a first transmission roller rotatably arranged on the right side of the upper surface of the filter screen plate and a second transmission roller rotatably arranged on the left side of the upper surface of the filter screen plate, the first transmission roller and the second transmission roller are aligned with the corresponding side surfaces of the filter screen plate; the first transmission roller is aligned in parallel with the second transmission roller, and a conveyor belt is connected between the two, and the conveyor belt wraps the outer circumference of the first transmission roller and the second transmission roller and is connected end to end; a plurality of parallel and aligned rubber scrapers are evenly spaced on the conveyor belt, and the rubber scrapers are arranged across the front and rear sides of the filter screen plate, and a brush is provided on the side of the rubber scraper away from the conveyor belt, and when the brushes rotate to the side close to the filter screen plate, they abut against the filter screen plate; the filter box main body is also provided with a driving member for driving the first transmission roller to rotate; Wherein, the filter screen plate is placed tilted upward from left to right; A scraper with a rack is provided on the top side of the left side wall of the slag discharge chamber. The scraper is arranged obliquely upwards to the slag discharge chamber. When the brushes rotate to a side close to the scraper, they come into contact with the rack of the scraper. Among them, the right side wall of the sewage trough, the filter mesh plate, the left side wall of the slag discharge chamber and the inner wall of the filter box body are combined to form a filtered water chamber, the lower part of the filtered water chamber is provided with a water outlet, the sewage trough is provided with a first slag discharge port, and the slag discharge chamber is provided with a second slag discharge port.

2. A primary filter for a domestic sewage treatment system according to claim 1, characterized in that: The filter screen is a rotary mechanical grille screen, and the rotary mechanical grille screen is a filter plate made of 304 stainless steel.

3. A primary filter for a domestic sewage treatment system according to claim 1, characterized in that: The brush is arranged on a brush fixing plate, and the brush fixing plate is fixed to the rubber scraper by glue.

4. A primary filter for a domestic sewage treatment system according to claim 1, characterized in that: The driving component includes a motor and a built-in reducer. The power of the motor is transmitted to the built-in reducer through a coupling. The built-in reducer is connected to the first transmission roller shaft.

5. The primary filter for a domestic sewage treatment system according to claim 1, characterized in that: The first slag discharge port is located at the lower left portion of the front side of the filter box body. The first slag discharge port is a square slag discharge port with a length of 200 mm and a width of 200 mm.

6. A primary filter for a domestic sewage treatment system according to claim 1, characterized in that: The height of the right side wall of the sewage tank is 170 mm.

7. A primary filter for a domestic sewage treatment system according to claim 1, characterized in that: The height of the filter box body is 1000 mm and the width is 1500 mm.

8. The primary filter for a domestic sewage treatment system according to claim 1, characterized in that: The sewage tank also includes an overflow port and a drain port.

9. The primary filter for a domestic sewage treatment system according to claim 1, characterized in that: The water retaining plate is arranged obliquely and is located in the same plane as the filter screen plate.

10. The primary filter for a domestic sewage treatment system according to claim 1, characterized in that: The second slag discharge port is located at the lower right side of the filter box body. The second slag discharge port is a square slag discharge port with a length of 500 mm and a width of 500 mm. The second slag discharge port is connected to the slag receiving bucket through a pipe.

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