Sewage filtering and purification equipment for sewage treatment and use method

Abstract

The present invention relates to the technical field of sewage treatment, and discloses a sewage filtering and purification device for sewage treatment and a method of using the device, comprising a main body, and also comprising a water inlet mechanism, wherein the water inlet mechanism is arranged on the top of the main body, the water inlet mechanism comprises a water inlet frame, the water inlet frame is fixedly connected to the top of the main body, the top of the water inlet frame is fixedly connected to a water inlet box, a primary filter mechanism, the primary filter mechanism is arranged inside the water inlet box, the primary filter mechanism comprises a primary filter plate, the primary filter plate is slidably connected inside the water inlet box, and a closing mechanism is arranged on the inner wall of the primary filter plate, and the closing mechanism comprises a scraping plate. In the present invention, when the closing plate is pulled out of the cleaning port, the scraping plate will be driven to slide on the surface of the primary filter plate, so that the debris on the surface of the primary filter plate is pulled out of the cleaning port by the scraping plate, thereby cleaning the surface of the primary filter plate, avoiding the difficulty of cleaning the filter screen because most of the filter screens are distributed at the bottom of the water inlet box, and improving the convenience of cleaning the debris on the surface of the primary filter plate.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to sewage filtering and purification equipment for sewage treatment and a use method thereof. Background Art

[0002] Urban sewage refers to domestic sewage, industrial wastewater and runoff sewage within the urban area. It is generally collected by urban pipes and discharged into water bodies after being treated in urban sewage treatment plants. In addition to containing a large amount of organic matter, pathogens and viruses, urban sewage also contains a large amount of industrial wastewater (accounting for about 60% to 80% of the total urban sewage) and increasingly complex water quality and increasingly serious pollution of runoff sewage due to the rapid development of industry. Urban sewage contains various types and degrees of various toxic and harmful pollutants. The treatment of urban sewage involves many aspects, and it is necessary to make a comprehensive plan for the sewer system, the location and treatment process of sewage treatment plants, and the utilization and discharge requirements of treated sewage.

[0003] When filtering urban sewage, it is necessary to perform a preliminary filtration on the sewage to separate and filter the larger debris carried in the sewage to prevent sewage with large debris from directly entering the sewage filtration and purification equipment and causing the filter element to be contaminated too quickly. Generally, the large debris carried in the sewage varies in size, which will cause some debris to be stuck in the strip filter. If it is not cleaned for a long time, it will cause the filter to become clogged, thereby affecting the use of the filter. At the same time, because the filters are mostly distributed at the bottom of the water inlet tank, it is difficult to clean them and their practicality is low. Summary of the invention

[0004] The object of the present invention is to provide a sewage filtering and purification device for sewage treatment and a method of use to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention is a sewage filtering and purification device for sewage treatment and a method of using the device, comprising a main body and further comprising:

[0007] A water inlet mechanism is arranged on the top of the main body, and the water inlet mechanism includes a water inlet frame, which is fixedly connected to the top of the main body, and a water inlet tank is fixedly connected to the top of the water inlet frame;

[0008] A primary filter mechanism is arranged inside the water inlet tank, and the primary filter mechanism includes a primary filter plate, and the primary filter plate is slidably connected inside the water inlet tank;

[0009] The closing mechanism is arranged on the inner wall of the primary filter plate, and includes a scraper plate, which is slidably connected to the top of the primary filter plate, and a closing plate is fixedly connected to the left side of the scraper plate, and two sliding holes are formed through the outer wall of the closing plate;

[0010] The unclogging mechanism is arranged inside the water inlet tank. The unclogging mechanism includes two sliding frames, which are respectively slidably connected to the inner walls of the two sliding holes. The two sliding frames are located on one side inside the water inlet tank and are fixedly connected with a cleaning frame. The top of the cleaning frame is fixedly connected to one end away from the sliding frame, and the top of the connecting strip is fixedly connected to a pull rope.

[0011] Furthermore, a liquid outlet is provided at the bottom of the main body, a water outlet pipe is connected to the inside of the liquid outlet, three filter element installation ports are provided on the outer wall of the shrinkable main body, filter elements are inserted into the filter element installation ports, and two embedding grooves are provided on the outer wall of the main body, and the two embedding grooves are symmetrically distributed with the main body as the center.

[0012] Furthermore, a collecting mechanism is provided on the outer wall of the main body, two placing plates are fixedly connected to the bottom of the two engaging grooves, supporting legs are fixedly connected to the bottom of the placing plates, a collecting box is engaged in the engaging grooves, the bottom of the collecting box is abutted against the top of the placing plates, and handles are fixedly connected to the left and right sides of the collecting box.

[0013] Furthermore, the water inlet rack is connected to the interior of the main body, and the water inlet mechanism also includes a cleaning port, which is respectively opened on the front and back of the water inlet tank. Two slide grooves are opened on the left and right sides of the main body. Extension strips are fixedly connected to the front and back of the water inlet rack, and two limit grooves are opened on the top of the water inlet tank. Four protrusions are fixedly connected to the four corners of the top of the water inlet tank.

[0014] Furthermore, the primary filter mechanism also includes a sliding closed frame, which is slidably connected inside the slide groove, and a support plate is fixedly connected to the top of the sliding closed frame, and the bottom of the support plate is abutted against the top of the water inlet tank, and the bottom of the sliding closed frame is fixedly connected to the primary filter plate, and the primary filter plate is a strip mesh structure.

[0015] Furthermore, a plurality of tooth blocks are arranged at the bottom of the scraper plate, and the plurality of tooth blocks are arranged corresponding to the strip holes of the strip mesh structure of the primary filter plate, the closing plate is arranged corresponding to the cleaning port, a contraction groove is opened on the top inner wall of the sliding hole, and a compression spring is fixedly connected to the top inner wall of the contraction groove.

[0016] Furthermore, a blocking block is slidably connected to the inner wall of the shrinkage groove, and the bottom of the blocking block is against the top of the sliding frame. There are two closing mechanisms, and the two closing mechanisms are symmetrically distributed with the water inlet tank as the center. The bottoms of the two extension strips are fixedly connected to a hydraulic cylinder, which is a bidirectional hydraulic cylinder. The two output ends of the hydraulic cylinder are respectively fixedly connected to the two closing plates.

[0017] Furthermore, blocking plates are provided at two locations on the top of the sliding frame near the outer wall and the inner wall of the closing plate. The cleaning frame is inserted into the strip holes of the strip mesh structure. The dredging mechanism also includes a pull rod, which is fixedly connected to the tops of the two sliding frames. The cleaning frame is made of elastic material, and the pull rope is engaged with the limit groove. There are two groups of dredging mechanisms, and the two groups of dredging mechanisms are respectively arranged corresponding to the two closing mechanisms.

[0018] A method for using a sewage filtering and purification device for sewage treatment comprises the following steps:

[0019] S1: Add sewage into the water inlet tank, filter the impurities in the sewage through the primary filter plate, and let the sewage after the primary filtration enter the main body;

[0020] S2: The sewage entering the main body will be filtered by the filter element inside the filter element installation port, and then discharged into the collection bucket below through the liquid outlet;

[0021] S3: Pull the pull rod upward to drive the sliding frame to slide upward inside the sliding hole, so that the cleaning frame moves inside the gap on the primary filter plate, thereby pushing out the debris stuck inside the gap on the primary filter plate, and clearing the primary filter plate;

[0022] S4: After the debris on the surface of the primary filter plate is pulled out of the primary filter plate, it can drop directly into the collection box.

[0023] The present invention has the following beneficial effects:

[0024] (1) The present invention pulls the pull rod upward to drive the sliding frame to slide upward inside the sliding hole, and at the same time drives the blocking block to shrink into the shrinkage groove, compresses the compression spring, and makes the cleaning frame move inside the gap on the primary filter plate, thereby pushing out the debris stuck in the gap on the primary filter plate, and clearing and cleaning the primary filter plate. The cleaning can be performed at any time during use to avoid the phenomenon that the filter screen is blocked if it is not cleaned for a long time, thereby avoiding affecting the use of the filter screen. After the debris is cleaned to the top of the primary filter plate, the cleaning frame is kept on the surface of the primary filter plate, and then the two closing plates are pushed by the hydraulic cylinder to move relative to each other, so that the closing plates leave the cleaning port. When the closing plate is pulled out of the cleaning port, it will drive the scraper plate to slide on the surface of the primary filter plate, so that the debris on the surface of the primary filter plate is pulled out of the cleaning port by the scraper plate, thereby cleaning the surface of the primary filter plate, avoiding the difficulty in cleaning the filter screen because most of the filter screens are distributed at the bottom of the water inlet tank, and improving the convenience of cleaning the debris on the surface of the primary filter plate.

[0025] (2) The present invention adds sewage into the water inlet tank and performs preliminary filtering on the debris in the sewage through the preliminary filter plate to prevent the debris from accumulating on the surface of the filter element and reducing the service life of the filter element. After the cleaning frame and the connecting strip are completely pushed out of the cleaning port, the abutment plate can be pulled to make the sliding closing frame slide inside the slide groove, so that the preliminary filter plate can be taken out for replacement or maintenance. After the cleaning frame is reset, the block is pushed out of the contraction groove by the compression spring, and the elastic force of the compression spring makes the block tightly abut against the top of the sliding frame, so as to close the slide hole and prevent the sewage inside the water inlet tank from overflowing through the slide hole. In the process of filtering the sewage through the preliminary filter plate, if the filtering is too slow due to the blockage of the preliminary filter plate, the pull rope can be pulled to deform the cleaning frame, so that it can move in the gap of the preliminary filter plate to temporarily clear the preliminary filter plate.

[0026] (3) After the debris on the surface of the primary filter plate is pulled out of the primary filter plate, the debris can be directly dropped into the collection box, thereby collecting and storing the debris, which is convenient for centralized processing of the debris. The collection box can be supported and placed by placing the plate in the fitting groove, and combined with the handle, it is convenient to take and place the collection box, thereby improving the practicality of the device. The filter element is installed inside the main body through the filter element installation port, and the sewage entering the main body through the water inlet frame will be filtered by the filter element inside the filter element installation port, and then discharged into the collection bucket below through the liquid outlet.

[0027] Of course, any product implementing the present invention does not necessarily need to achieve all of the above advantages at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 It is a cross-sectional view of the present invention;

[0031] Figure 3 It is a schematic diagram of the main structure of the present invention;

[0032] Figure 4 It is a schematic diagram of the structure of the water inlet mechanism of the present invention;

[0033] Figure 5 This is a schematic diagram of the structure of the primary filtration mechanism of the present invention;

[0034] Figure 6 It is a schematic diagram of the structure of the closing mechanism of the present invention;

[0035] Figure 7 It is a schematic diagram of the structure of the dredging mechanism of the present invention;

[0036] Figure 8 for Figure 6 Enlarged view of point A in the middle;

[0037] Fig. 9 Figure 2 is a diagram of the method of the present invention.

[0038] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0039] In the figure: 1. Main body; 101. Liquid outlet; 102. Filter element installation port; 103. Fitting groove; 2. Collection mechanism; 201. Placement plate; 202. Support leg; 203. Collection box; 204. Handle; 3. Water inlet mechanism; 301. Water inlet rack; 302. Water inlet tank; 303. Cleaning port; 304. Slide; 305. Extension strip; 306. Limiting groove; 307. Bump; 4. Initial Filter mechanism; 401, sliding closing frame; 402, abutment plate; 403, primary filter plate; 5, closing mechanism; 501, scraper abutment plate; 502, closing plate; 503, sliding hole; 504, contraction groove; 505, compression spring; 506, blocking block; 507, hydraulic cylinder; 6, unblocking mechanism; 601, sliding frame; 602, pull rod; 603, cleaning frame; 604, connecting strip; 605, pull rope. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] Example 1, please refer to Figure 1-Figure 8As shown, the present invention is a sewage filtering and purification device for sewage treatment and a method of using the same, comprising a primary filtering mechanism 4, the primary filtering mechanism 4 being arranged inside a water inlet tank 302, the primary filtering mechanism 4 comprising a primary filtering plate 403, the primary filtering plate 403 being slidably connected inside the water inlet tank 302, the primary filtering mechanism 4 further comprising a sliding closed frame 401, the sliding closed frame 401 being slidably connected inside a chute 304, a butt plate 402 being fixedly connected to the top of the sliding closed frame 401, the bottom of the butt plate 402 butting against the top of the water inlet tank 302, the bottom of the sliding closed frame 401 being fixedly connected to the primary filtering plate 403, the primary filtering plate 403 being a strip-shaped mesh structure, the primary filtering plate 403 is used to perform primary filtering on the sundries in the sewage, after the cleaning frame 603 and the connecting strip 604 are completely pushed out of the cleaning port 303, the butt plate 402 can be pulled to make the sliding closed frame 401 slide inside the chute 304, thereby taking out the primary filtering plate 403 for replacement or maintenance;

[0042] The closing mechanism 5 is arranged on the inner wall of the primary filter plate 403. The closing mechanism 5 includes a scraper plate 501, which is slidably connected to the top of the primary filter plate 403. A closing plate 502 is fixedly connected to the left side of the scraper plate 501. Two sliding holes 503 are penetrated through the outer wall of the closing plate 502. A plurality of tooth blocks are arranged at the bottom of the scraper plate 501, and the plurality of tooth blocks are arranged corresponding to the strip holes of the strip mesh structure of the primary filter plate 403. The closing plate 502 is arranged corresponding to the cleaning port 303. A contraction groove 504 is arranged on the inner wall at the top of the sliding hole 503. A compression spring 505 is fixedly connected to the inner wall at the top of the contraction groove 504. After the debris is cleaned to the top of the primary filter plate 403, The cleaning frame 603 is kept on the surface of the primary filter plate 403, and then the two closing plates 502 are pushed by the hydraulic cylinder 507 to move relatively, so that the closing plate 502 leaves the cleaning port 303. When the closing plate 502 is pulled out of the cleaning port 303, the scraping plate 501 is driven to slide on the surface of the primary filter plate 403, so that the debris on the surface of the primary filter plate 403 is pulled out of the cleaning port 303 by the scraping plate 501, so as to clean the surface of the primary filter plate 403. After the cleaning frame 603 is reset, the blocking block 506 is pushed out of the contraction groove 504 by the compression spring 505, and the elastic force of the compression spring 505 makes the blocking block 506 tightly abut against the top of the sliding frame 601, so as to close the sliding hole 503.

[0043] The dredging mechanism 6 is arranged inside the water inlet box 302. The dredging mechanism 6 includes two sliding frames 601, and the two sliding frames 601 are respectively slidably connected to the inner walls of the two sliding holes 503. The two sliding frames 601 are located on one side of the water inlet box 302 and are fixedly connected with a cleaning frame 603. The end of the top of the cleaning frame 603 away from the sliding frame 601 is fixedly connected with a connecting strip 604, and the top of the connecting strip 604 is fixedly connected with a pull rope 605. The top of the sliding frame 601 is close to the outer wall and the inner wall of the closing plate 502. The cleaning frame 603 is inserted into the strip holes of the strip mesh structure. The dredging mechanism 6 also includes a pull rope. Rod 602, the pull rod 602 is fixedly connected to the top of the two sliding frames 601, the cleaning frame 603 is made of elastic material, the pull rope 605 is engaged with the limit groove 306, there are two groups of dredging mechanisms 6, and the two groups of dredging mechanisms 6 are respectively arranged corresponding to the two closing mechanisms 5. Pull the pull rod 602 upward to drive the sliding frame 601 to slide upward inside the sliding hole 503, and at the same time drive the blocking block 506 to shrink into the shrinkage groove 504, compress the compression spring 505, and make the cleaning frame 603 move inside the gap on the primary filter plate 403, thereby pushing out the debris stuck in the gap on the primary filter plate 403, and dredging and cleaning the primary filter plate 403.

[0044] When in use, the pull rod 602 is pulled upward to drive the sliding frame 601 to slide upward inside the sliding hole 503, and at the same time drive the blocking block 506 to shrink into the shrinkage groove 504, compressing the compression spring 505, so that the cleaning frame 603 moves inside the gap on the primary filter plate 403, thereby pushing out the internal debris stuck in the gap on the primary filter plate 403, and dredging and cleaning the primary filter plate 403. After the debris is cleaned to the top of the primary filter plate 403, the cleaning frame 603 is kept on the surface of the primary filter plate 403, and then the two closing plates 502 are pushed by the hydraulic cylinder 507 to move relative to each other, so that the closing plate 502 leaves the cleaning port 303. When the closing plate 502 is pulled out of the cleaning port 303, it will drive the scraper plate 501 to slide on the surface of the primary filter plate 403, so that the debris on the surface of the primary filter plate 403 is pulled out of the cleaning port 303 by the scraper plate 501, so as to clean the surface of the primary filter plate 403. The debris in the sewage is initially filtered through the primary filter plate 403. After the cleaning frame 603 and the connecting strip 604 are completely pushed out of the cleaning port 303, the abutment plate 402 can be pulled to make the sliding closing frame 401 slide inside the sliding groove 304, so that the primary filter plate 403 can be taken out for replacement or maintenance. After the cleaning frame 603 is reset, the blocking block 506 is pushed out of the shrinkage groove 504 by the compression spring 505. The blocking block 506 is tightly abutted against the top of the sliding frame 601 by the elastic force of the compression spring 505, so that the sliding hole 503 is closed to prevent the sewage inside the water inlet tank 302 from overflowing through the sliding hole 503. In the process of filtering sewage through the primary filter plate 403, if the primary filter plate 403 is blocked and the filtration is too slow, the pull rope 605 can be pulled to deform the cleaning frame 603, so that it can move in the gap of the primary filter plate 403 to temporarily dredge the primary filter plate 403.

[0045] Example 2, please refer to Figure 1-Figure 8 As shown, it also includes a water inlet mechanism 3, which is arranged on the top of the main body 1. The water inlet mechanism 3 includes a water inlet frame 301, which is fixedly connected to the top of the main body 1, and a water inlet box 302 is fixedly connected to the top of the water inlet frame 301. The water inlet frame 301 is communicated with the inside of the main body 1. The water inlet mechanism 3 also includes a cleaning port 303, which is respectively arranged on the front and back of the water inlet box 302, and two slide grooves 304 are arranged on the left and right sides of the main body 1. The front and back of the water inlet frame 301 are fixedly connected with extension strips 305, and two limiting grooves 306 are arranged on the top of the water inlet box 302. Four protrusions 307 are fixedly connected at the four corners of the top of the water inlet box 302. The cleaning port 303 is convenient for discharging the debris inside the primary filter plate 403, and the sewage is added to the inside of the water inlet box 302. The debris in the sewage is preliminarily filtered by the preliminarily filter plate 403, so that the preliminarily filtered sewage enters the inside of the main body 1.

[0046] A liquid outlet 101 is provided at the bottom of the main body 1, and a water outlet pipe is externally connected to the liquid outlet 101. Three filter element installation ports 102 are provided on the outer wall of the shrinking main body 1, and filter elements are inserted into the filter element installation ports 102. Two interlocking grooves 103 are provided on the outer wall of the main body 1, and the two interlocking grooves 103 are symmetrically distributed with the main body 1 as the center. The filter element is installed inside the main body 1 through the filter element installation port 102, and the sewage entering the main body 1 through the water inlet frame 301 will be filtered by the filter element inside the filter element installation port 102, and then discharged to the collection bucket below through the liquid outlet 101;

[0047] A collecting mechanism 2 is provided on the outer wall of the main body 1, and two placing plates 201 are fixedly connected to the bottom of the two interlocking grooves 103, and a supporting leg 202 is fixedly connected to the bottom of the placing plate 201. A collecting box 203 is interlocked inside the interlocking groove 103, and the bottom of the collecting box 203 is against the top of the placing plate 201, and handles 204 are fixedly connected to the left and right sides of the collecting box 203. After the debris on the surface of the primary filter plate 403 is pulled out of the primary filter plate 403, it can directly fall into the collecting box 203, so that the debris is collected and stored, and the collecting box 203 can be supported and placed by the placing plate 201 in the interlocking groove 103, and cooperated with the handle 204 to facilitate the taking and placing of the collecting box 203.

[0048] When in use, after the debris on the surface of the primary filter plate 403 is pulled out of the primary filter plate 403, it can directly fall into the collection box 203, so that the debris is collected and stored, and the collection box 203 can be supported and placed by placing the plate 201 in the fitting groove 103, which cooperates with the handle 204 to facilitate the collection box 203 to be taken and placed, and the filter element is installed in the main body 1 through the filter element installation port 102. The sewage entering the main body 1 through the water inlet frame 301 will be filtered by the filter element inside the filter element installation port 102, and then discharged to the collection bucket below through the liquid outlet 101.

[0049] A method for using a sewage filtering and purification device for sewage treatment comprises the following steps:

[0050] S1: Add sewage into the water inlet tank 302, filter the impurities in the sewage through the primary filter plate 403, and let the sewage after the primary filtration enter the main body 1;

[0051] S2: The sewage entering the main body 1 is filtered by the filter element inside the filter element installation port 102, and then discharged into the collection bucket below through the liquid outlet 101;

[0052] S3: Pull the pull rod 602 upward to drive the sliding frame 601 to slide upward inside the sliding hole 503, so that the cleaning frame 603 moves inside the gap on the primary filter plate 403, thereby pushing out the debris stuck inside the gap on the primary filter plate 403, and clearing the primary filter plate 403;

[0053] S4: After the debris on the surface of the primary filter plate 403 is pulled out of the primary filter plate 403 , it can directly fall into the collection box 203 .

[0054] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A sewage filtering and purification device for sewage treatment, comprising a main body (1), characterized in that: Also includes: A water inlet mechanism (3), the water inlet mechanism (3) being arranged on the top of the main body (1), the water inlet mechanism (3) comprising a water inlet frame (301), the water inlet frame (301) being fixedly connected to the top of the main body (1), the top of the water inlet frame (301) being fixedly connected to a water inlet box (302); A primary filter mechanism (4), the primary filter mechanism (4) being arranged inside the water inlet box (302), the primary filter mechanism (4) comprising a primary filter plate (403), the primary filter plate (403) being slidably connected inside the water inlet box (302); A closing mechanism (5), the closing mechanism (5) being arranged on the inner wall of the primary filter plate (403), the closing mechanism (5) comprising a scraping plate (501), the scraping plate (501) being slidably connected to the top of the primary filter plate (403), a closing plate (502) being fixedly connected to the left side of the scraping plate (501), and two sliding holes (503) being provided through the outer wall of the closing plate (502); A dredging mechanism (6), the dredging mechanism (6) being arranged inside the water inlet box (302), the dredging mechanism (6) comprising two sliding frames (601), the two sliding frames (601) being respectively slidably connected to the inner walls of the two sliding holes (503), a cleaning frame (603) being fixedly connected to one side of the two sliding frames (601) located inside the water inlet box (302), a connecting strip (604) being fixedly connected to the top of the cleaning frame (603) away from the sliding frame (601), and a pull rope (605) being fixedly connected to the top of the connecting strip (604); The water inlet frame (301) is in communication with the interior of the main body (1), the water inlet mechanism (3) further comprises a cleaning port (303), the cleaning port (303) is respectively provided on the front and back of the water inlet box (302), two slide grooves (304) are provided on the left and right sides of the main body (1), the front and back of the water inlet frame (301) are fixedly connected with extension strips (305), the top of the water inlet box (302) is provided with two limiting grooves (306), and the four corners of the top of the water inlet box (302) are fixedly connected with four protrusions (307); The primary filter mechanism (4) further comprises a sliding closed frame (401), wherein the sliding closed frame (401) is slidably connected inside the slide groove (304), a support plate (402) is fixedly connected to the top of the sliding closed frame (401), the bottom of the support plate (402) is abutted against the top of the water inlet tank (302), the bottom of the sliding closed frame (401) is fixedly connected to a primary filter plate (403), and the primary filter plate (403) is a strip-shaped mesh structure; The scraping plate (501) is provided with a plurality of tooth-shaped blocks at the bottom thereof, and the plurality of tooth-shaped blocks are provided corresponding to the strip-shaped holes of the strip-shaped mesh structure of the primary filter plate (403); the closing plate (502) is provided corresponding to the cleaning port (303); a contraction groove (504) is provided on the top inner wall of the sliding hole (503); and a compression spring (505) is fixedly connected to the top inner wall of the contraction groove (504); The inner wall of the shrinkage groove (504) is slidably connected with a blocking block (506), the bottom of the blocking block (506) is against the top of the sliding frame (601), there are two closing mechanisms (5), the two closing mechanisms (5) are symmetrically distributed with the water inlet tank (302) as the center, the bottoms of the two extension bars (305) are fixedly connected with a hydraulic cylinder (507), the hydraulic cylinder (507) is a bidirectional hydraulic cylinder, and the two output ends of the hydraulic cylinder (507) are respectively fixedly connected to the two closing plates (502); Blocking plates are provided at two locations on the top of the sliding frame (601) close to the outer wall and the inner wall of the closing plate (502); the cleaning frame (603) is inserted into the strip holes of the strip mesh structure; the dredging mechanism (6) also includes a pull rod (602); the pull rod (602) is fixedly connected to the tops of the two sliding frames (601); the cleaning frame (603) is made of elastic material; the pull rope (605) is engaged with the limiting groove (306); the dredging mechanism (6) has two groups, and the two groups of dredging mechanisms (6) are respectively arranged corresponding to the two closing mechanisms (5); After the cleaning frame (603) is reset, the blocking block (506) is pushed out of the contraction groove (504) by the compression spring (505), and the blocking block (506) is tightly abutted against the top of the sliding frame (601) by the elastic force of the compression spring (505), thereby closing the sliding hole (503) to prevent the sewage inside the water inlet tank (302) from overflowing through the sliding hole (503). When the sewage is filtered through the primary filter plate (403) and the filtering is too slow due to the blockage of the primary filter plate (403), the pull rope (605) is pulled to deform the cleaning frame (603), so that the cleaning frame (603) moves in the gap of the primary filter plate (403) to temporarily clear the primary filter plate (403); The pull rod (602) is pulled upward to drive the sliding frame (601) to slide upward inside the sliding hole (503), and at the same time drive the blocking block (506) to shrink into the shrinkage groove (504), compressing the compression spring (505) so that the cleaning frame (603) moves inside the gap on the primary filter plate (403), thereby pushing out the debris stuck inside the gap on the primary filter plate (403), and clearing the primary filter plate (403). After the debris is cleaned to the top of the primary filter plate (403), the cleaning frame (603) is kept on the surface of the primary filter plate (403), and then the two closing plates (502) are pushed by the hydraulic cylinder (507) to move relative to each other, so that the closing plates (502) After leaving the cleaning port (303), when the closing plate (502) is pulled out of the cleaning port (303), the scraping plate (501) is driven to slide on the surface of the primary filter plate (403), thereby pulling the debris on the surface of the primary filter plate (403) out of the cleaning port (303) by the scraping plate (501), thereby cleaning the surface of the primary filter plate (403), and performing a preliminary filtration of the debris in the sewage by the primary filter plate (403). After the cleaning frame (603) and the connecting strip (604) are completely pushed out of the cleaning port (303), the plate (402) is pulled to make the sliding closing frame (401) slide inside the slide groove (304), thereby taking out the primary filter plate (403) for replacement or maintenance.

2. The sewage filtering and purification equipment for sewage treatment according to claim 1, characterized in that: The bottom of the main body (1) is provided with a liquid outlet (101), the inside of the liquid outlet (101) is externally connected to a water outlet pipe, the outer wall of the shrinkable main body (1) is provided with three filter element installation openings (102), the filter elements are inserted into the filter element installation openings (102), and the outer wall of the main body (1) is provided with two embedding grooves (103), and the two embedding grooves (103) are symmetrically distributed with the main body (1) as the center.

3. The sewage filtering and purification equipment for sewage treatment according to claim 2, characterized in that: The outer wall of the main body (1) is provided with a collecting mechanism (2); the bottoms of the two engaging grooves (103) are fixedly connected to two placement plates (201); the bottoms of the placement plates (201) are fixedly connected to supporting legs (202); a collecting box (203) is engaged inside the engaging grooves (103); the bottom of the collecting box (203) abuts against the top of the placement plates (201); and handles (204) are fixedly connected to the left and right sides of the collecting box (203).

4. The sewage filtering and purification equipment for sewage treatment according to claim 3 is characterized in that: The method for using the sewage filtering and purification equipment for sewage treatment comprises the following steps: S1: Add sewage into the water inlet tank (302), filter impurities in the sewage through the primary filter plate (403), and allow the sewage after the primary filtration to enter the main body (1); S2: The sewage entering the main body (1) is filtered by the filter element inside the filter element installation port (102), and then discharged into the collection bucket below through the liquid outlet (101); S3: Pull the pull rod (602) upwards, driving the sliding frame (601) to slide upwards inside the sliding hole (503), so that the cleaning frame (603) moves inside the gap on the primary filter plate (403), thereby pushing out the debris stuck inside the gap on the primary filter plate (403), and clearing and cleaning the primary filter plate (403); S4: After the debris on the surface of the primary filter plate (403) is pulled out of the primary filter plate (403), it can directly fall into the collection box (203).

Images