CN214244034U

CN214244034U - Sewage pretreatment device

Info

Publication number: CN214244034U
Application number: CN202023232946.0U
Authority: CN
Inventors: 雷宇; 陈文波; 余沛
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-09-21
Anticipated expiration: 2030-12-28

Abstract

The utility model discloses a sewage pretreatment device, including box and water pump, still including can clear up prevent that the jam from preventing the jam structure, can get rid of the clearance structure of depositing mud and can automated inspection sewage pretreatment degree and can circulate the loop configuration who handles, driving motor is installed to the bottom of box, and installs the collecting vat in one side of the inside bottom of box, the agitator cabinet is installed to the opposite side of the inside bottom of box. The utility model discloses rotate first dwang pulling rope and pull up the filter screen in the use, then rotate the second dwang, drive first threaded rod by the second dwang and rotate for first screw thread piece horizontal migration because the scraper blade passes through the connecting block to be connected with first screw thread piece, lead to the scraper blade to carry out the cleaning work on the surface of filter screen, clear up solid waste to the collecting tank in, and because the spring block is installed to the connecting block, can adapt to and carry out better clearance to the filter screen surface.

Description

Sewage pretreatment device

Technical Field

The utility model relates to a sewage pretreatment technical field specifically is a sewage pretreatment device.

Background

Sewage pretreatment is a process of purifying sewage to meet the requirement of discharging the sewage into a certain water body or reusing the sewage, and the sewage pretreatment is widely applied to various fields such as buildings, agriculture, traffic, energy, petrifaction, environmental protection, urban landscape, medical treatment, catering and the like, and also increasingly enters the daily life of common people, and a device for sewage pretreatment is presented at present.

With the continuous installation and use of sewage pretreatment devices, the following problems are found in the use process:

1. traditional sewage pretreatment device does not have better clearance structure to the filter screen in the use, takes place to block up easily, influences sewage pretreatment next time.

2. Traditional sewage pretreatment devices do not have better clearance structure to silt in the use, pile up easily, influence quality of water.

3. Traditional sewage pretreatment device does not have better secondary treatment in the use, can not guarantee to carry out complete purification to sewage pretreatment.

It is necessary to design a sewage pretreatment apparatus in view of the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a sewage pretreatment device to propose current filter screen easy jam, silt can't be handled and do not carry out the problem of secondary treatment in solving above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a sewage pretreatment device comprises a box body, a water pump, an anti-blocking structure capable of cleaning and preventing blockage, a cleaning structure capable of removing precipitated sludge and a circulating structure capable of automatically detecting the sewage pretreatment degree and performing circulating treatment;

the cleaning device comprises a box body, a driving motor, a collecting tank, a stirring cabinet, a rotary table, a filtering and precipitating cabinet, a groove, a sewage discharge pipe, a cleaning structure and a cleaning mechanism, wherein the driving motor is installed at the bottom end of the box body, the collecting tank is installed at one side of the bottom end in the box body, the stirring cabinet is installed at the other side of the bottom end in the box body, the rotary table is installed at the bottom end in the stirring cabinet through a bearing, the output end of the driving motor penetrates through the box body and the bottom end of the stirring cabinet to be connected with the rotary table, stirring rods are evenly installed at the top end of the rotary table, the filtering and precipitating cabinet is installed at the top end of the stirring cabinet, the groove is formed in the bottom end in the filtering and precipitating cabinet, the sewage discharge pipe is installed at one side of the groove, one end of the sewage discharge pipe penetrates through one side of the filtering and precipitating cabinet, and the cleaning structure is installed at the front end and the back end in the groove;

the top end of the box body is provided with an input pipe, one end of the input pipe penetrates through the top end of the box body and extends into the filtering and precipitating cabinet, and the anti-blocking structure is arranged at the upper ends of two sides in the filtering and precipitating cabinet;

the water pump is installed in the middle of one end of the box body, the input end of the water pump is connected with a water inlet pipe, one end of the water inlet pipe penetrates through one ends of the box body and the filtering and precipitating cabinet and extends to the inside of the filtering and precipitating cabinet, the output end of the water pump is connected with a water outlet pipe, one end of the water outlet pipe penetrates through one ends of the box body and the stirring cabinet and extends to the inside of the stirring cabinet, and the circulating structure is installed on one side, close to the stirring cabinet, of the box body;

the circulation structure further comprises an output pipe, the output pipe is installed at the bottom end inside the stirring cabinet, one end of the output pipe penetrates through the stirring cabinet and one side of the box body, the water quality sensor is installed at one end of the output pipe, the bottom end of the output pipe is connected with a drain pipe, a second electromagnetic valve is installed at the bottom end of the drain pipe, a circulation pipe is installed at the top end of the output pipe, a first electromagnetic valve is installed at the bottom end of the circulation pipe, and a single chip microcomputer is installed at the middle position, close to one side of the circulation pipe, of the box body.

Preferably, the anti-blocking structure comprises a first rotating rod, ropes, a filter screen, a first threaded rod, a connecting block, a first threaded block, a spring block, a scraper, a second rotating rod and a guide wheel, wherein the first rotating rod is installed in a filtering and precipitating cabinet, the guide wheel is installed at the top end of one side, close to the first rotating rod, of the filtering and precipitating cabinet, the filter screen is arranged in the filtering and precipitating cabinet, two ropes are connected to one end of the first rotating rod, the other end of each rope is attached to the guide wheel and is respectively connected with two sides of the filter screen, the first threaded rod is installed at the top ends of two sides in the box body through a bearing, the first threaded block is sleeved on the outer wall of the first threaded rod, the connecting block is installed at the bottom end of the first threaded block, the spring block is installed at the top end of the connecting block, the scraper is installed at the bottom end of the spring block, and one end of the scraper penetrates through the bottom end of the connecting block, a second rotating rod is installed on one side of the box body, and one end of the second rotating rod penetrates through one side of the box body to be connected with the first threaded rod.

Preferably, the cleaning structure comprises a second threaded rod, a second threaded block, a movable plate, a third threaded rod, a connecting rod, a servo motor and a third threaded block, the third threaded rod is arranged at one end inside the groove through a bearing, and the outer wall of the third threaded rod is sleeved with a third threaded block, one end of the box body is provided with a servo motor, the output end of the servo motor penetrates through the box body and the filtering and settling cabinet to be connected with a third threaded rod, the other end inside the groove is provided with a second threaded rod through a bearing, and the outer wall of the second threaded rod is sleeved with a second threaded block, one end of the second threaded rod is connected with one end of a third threaded rod, two sides of the bottom end in the filtering and settling cabinet are respectively provided with a movable plate, and one side of the movable plate is hinged with two connecting rods through a hinge piece, and the connecting rods are respectively hinged with the second thread block and the third thread block through the hinge piece.

Preferably, the threads of the second threaded rod are opposite in direction to the threads of the third threaded rod.

Preferably, the filter screen is concave, and the filter screen and the filtering sedimentation cabinet form a sliding connection.

Preferably, the output end of the water quality sensor is electrically connected with the input end of the single chip microcomputer, and the output end of the single chip microcomputer is electrically connected with the first electromagnetic valve and the second electromagnetic valve.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the filter screen cleaning device is provided with a first rotating rod, a rope, a filter screen, a second rotating rod, a first threaded block, a connecting block, a scraper and a collecting tank, wherein the first rotating rod is rotated to pull the filter screen up so as to be convenient to clean in the use process;

2. by arranging the servo motor, the second threaded rod, the second threaded block, the third threaded rod, the third threaded block, the movable handle, the connecting rod, the collecting tank and the sewage discharge pipe, when sludge is cleaned, the servo motor is started, the second threaded rod and the third threaded rod are driven to rotate by the servo motor, so that the second threaded block and the third threaded block are reciprocated, and the movable plate is reciprocated at the bottom end inside the filtering and settling cabinet under the driving of the connecting rod, so that the sludge at the bottom end inside the filtering and settling cabinet is cleaned to the bottom end of the groove, and then the sludge is discharged to the collecting tank through the sewage discharge pipe, thereby realizing the cleaning work of the filtering and settling cabinet;

3. through being provided with the quality of water sensor, first solenoid valve, the second solenoid valve, the circulating pipe, the output tube, input tube and drain pipe, the water that has advanced the medicament stirring and has handled is discharged through the output tube, through the detection of quality of water sensor, if the discharged water reaches corresponding standard, open the second solenoid valve through the singlechip and pass through the drain pipe discharge collection with water, if through detecting that the discovery discharged water does not reach corresponding standard, the quality of water sensor can open first solenoid valve through the singlechip and get into the circulating pipe with water, then get into the input tube under the guide of circulating pipe, handle again, thereby realized the secondary treatment of sewage and guaranteed that the discharged water is the quality of water that reaches the standard.

Drawings

FIG. 1 is a schematic front sectional view of the present invention;

FIG. 2 is a schematic top view of the cleaning structure of the present invention;

FIG. 3 is a schematic side view of the present invention;

fig. 4 is a schematic view of the anti-blocking structure of the present invention.

In the figure: 1. a box body; 2. collecting tank; 3. a blow-off pipe; 4. a filtration and sedimentation cabinet; 5. an anti-clogging structure; 501. a first rotating lever; 502. a rope; 503. a filter screen; 504. a first threaded rod; 505. connecting blocks; 506. a first thread block; 507. a spring block; 508. a squeegee; 509. a second rotating lever; 510. a guide wheel; 6. an input tube; 7. cleaning the structure; 701. a second threaded rod; 702. a second thread block; 703. a movable plate; 704. a third threaded rod; 705. a connecting rod; 706. a servo motor; 707. a third thread block; 8. a groove; 9. a circulation pipe; 10. a first solenoid valve; 11. a water quality sensor; 12. a second solenoid valve; 13. a drain pipe; 14. an output pipe; 15. a stirring cabinet; 16. a drive motor; 17. a stirring rod; 18. a water pump; 19. a water outlet pipe; 20. a water inlet pipe; 21. a turntable; 22. and a single chip microcomputer.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1: referring to fig. 1-4, the present invention provides a technical solution: a sewage pretreatment device comprises a box body 1, a water pump 18, an anti-blocking structure 5 capable of cleaning and preventing blocking, a cleaning structure 7 capable of removing precipitated sludge and a circulating structure capable of automatically detecting the sewage pretreatment degree and performing circulating treatment;

a driving motor 16 is installed at the bottom end of the box body 1, the type of the driving motor 16 can be TC7132, a collecting tank 2 is installed at one side of the bottom end inside the box body 1, a stirring cabinet 15 is installed at the other side of the bottom end inside the box body 1, a rotary table 21 is installed at the bottom end inside the stirring cabinet 15 through a bearing, the output end of the driving motor 16 penetrates through the box body 1 and the bottom end of the stirring cabinet 15 to be connected with the rotary table 21, stirring rods 17 are evenly installed at the top end of the rotary table 21, a filtering and precipitating cabinet 4 is installed at the top end of the stirring cabinet 15, a groove 8 is formed in the bottom end inside the filtering and precipitating cabinet 4, a sewage discharge pipe 3 is installed at one side of the groove 8, one end of the sewage discharge pipe 3 penetrates through one side of the filtering and precipitating cabinet 4, and cleaning structures 7 are installed at the front end and the rear end inside the groove 8;

an input pipe 6 is arranged at the top end of the box body 1, one end of the input pipe 6 penetrates through the top end of the box body 1 and extends into the filtering and precipitating cabinet 4, and anti-blocking structures 5 are arranged at the upper ends of two sides in the filtering and precipitating cabinet 4;

a water pump 18 is installed in the middle of one end of the box body 1, the type of the water pump 18 can be 25ZW8-15, the input end of the water pump 18 is connected with a water inlet pipe 20, one end of the water inlet pipe 20 penetrates through one ends of the box body 1 and the filtering and precipitating cabinet 4 and extends into the filtering and precipitating cabinet 4, the output end of the water pump 18 is connected with a water outlet pipe 19, one end of the water outlet pipe 19 penetrates through one ends of the box body 1 and the stirring cabinet 15 and extends into the stirring cabinet 15, and a circulating structure is installed on one side, close to the stirring cabinet 15, of the box body 1;

referring to fig. 1-4, the present invention provides a water dispenser, which further comprises a circulation structure, the circulation structure further comprises an output pipe 14, the output pipe 14 is installed AT the bottom end inside the stirring cabinet 15, one end of the output pipe 14 penetrates through the stirring cabinet 15 and one side of the box body 1, one end of the output pipe 14 is installed with a water quality sensor 11, the model of the water quality sensor 11 can be SXXC, the bottom end of the output pipe 14 is connected with a drain pipe 13, the bottom end of the drain pipe 13 is installed with a second electromagnetic valve 12, the top end of the output pipe 14 is installed with a circulation pipe 9, the bottom end of the circulation pipe 9 is installed with a first electromagnetic valve 10, a single chip microcomputer 22 is installed AT the middle position of the box body 1 near one side of the circulation pipe 9, and the model of the single chip microcomputer 22 can be AT89S 51;

the output end of the water quality sensor 11 is electrically connected with the input end of the singlechip 22, and the output end of the singlechip 22 is electrically connected with the first electromagnetic valve 10 and the second electromagnetic valve 12;

specifically, as shown in fig. 1 and 3, after sewage enters a stirring cabinet 15, corresponding chemicals are added, a driving motor 16 is started to drive a stirring rod 17 to perform sufficient stirring reaction, then the treated water is discharged through an output pipe 14, and after detection of a water quality sensor 11, if the discharged water reaches a corresponding standard, a second electromagnetic valve 12 is started through a singlechip switch 22 to discharge and collect the water through a drain pipe 13, and if the discharged water does not reach the corresponding standard, the water quality sensor 11 opens a first electromagnetic valve 10 through the singlechip switch 22 to enable the water to enter a circulating pipe 9, then the water enters an input pipe 6 under the guidance of the circulating pipe 9, and then the water is treated again, so that the treated water quality is subjected to secondary treatment;

example 2: the anti-blocking structure 5 comprises a first rotating rod 501, ropes 502, a filter screen 503, a first threaded rod 504, a connecting block 505, a first threaded block 506, a spring block 507, a scraper 508, a second rotating rod 509 and a guide wheel 510, wherein the first rotating rod 501 is installed on the filtering and precipitating cabinet 4, the guide wheel 510 is installed at the top end of one side, close to the first rotating rod 501, of the filtering and precipitating cabinet 4, the filter screen 503 is arranged inside the filtering and precipitating cabinet 4, two ropes 502 are connected to one end of the first rotating rod 501, the other end of each rope 502 is attached to the guide wheel 510 and respectively connected with two sides of the filter screen 503, the first threaded rods 504 are installed at the top ends of two sides inside the box body 1 through bearings, the first threaded blocks 506 are sleeved on the outer walls of the first threaded rods 504, the connecting block 505 is installed at the bottom end of the first threaded blocks 506, the spring block 507 is installed at the top end of the inside the connecting block 505, and the scraper 508 is installed at the bottom end of the spring block 507, one end of the scraper 508 penetrates through the bottom end of the connecting block 505, a second rotating rod 509 is mounted on one side of the box body 1, and one end of the second rotating rod 509 penetrates through one side of the box body 1 and is connected with the first threaded rod 504;

the filter screen 503 is concave, and the filter screen 503 is connected with the filtering precipitation cabinet 4 in a sliding way;

specifically, as shown in fig. 1 and 4, the rope 502 is pulled by rotating the first rotating rod 501 to pull up the filter screen 503, then the second rotating rod 509 is rotated, the first threaded rod 504 is driven by the second rotating rod 509 to rotate, so that the first threaded block 506 moves horizontally, because the scraper 508 is connected with the first threaded block 506 through the connecting block 505, the scraper 508 can perform cleaning work on the surface of the filter screen 503 to clean solid waste into the collecting tank 2, and because the connecting block 505 is provided with the spring block 507, the surface of the filter screen 503 can be cleaned well, so that the filter screen 503 can be cleaned more completely;

example 3: : the cleaning structure 7 comprises a second threaded rod 701, a second threaded block 702, a movable plate 703, a third threaded rod 704, a connecting rod 705, a servo motor 706 and a third threaded block 707, the third threaded rod 704 is mounted at one end inside the groove 8 through a bearing, and the outer wall of third threaded rod 704 is sleeved with third threaded block 707, one end of box 1 is installed with servo motor 706, and the output end of the servo motor 706 penetrates through the box body 1 and the filtering and settling cabinet 4 to be connected with a third threaded rod 704, the other end inside the groove 8 is provided with a second threaded rod 701 through a bearing, and the outer wall of the second threaded rod 701 is sleeved with a second threaded block 702, one end of the second threaded rod 701 is connected with one end of a third threaded rod 704, two sides of the bottom end inside the filtering and settling cabinet 4 are respectively provided with a movable plate 703, one side of the movable plate 703 is hinged with two connecting rods 705 through a hinge, and the connecting rods 705 are respectively hinged with the second thread block 702 and the third thread block 707 through the hinge;

the threads of second threaded rod 701 are opposite in direction to the threads of third threaded rod 704;

specifically, as shown in fig. 1 and fig. 2, after the sewage is subjected to standing precipitation in the filtering and precipitating cabinet 4, the water pump 18 is started to pump the sewage in the filtering and precipitating cabinet 4 into the stirring cabinet 15 through the water inlet pipe 20 and the water outlet pipe 19, then the servo motor 706 is started, the second threaded rod 701 and the third threaded rod 704 are driven by the servo motor 706 to rotate, so that the second threaded block 702 and the third threaded block 707 reciprocate, and the movable plate 703 reciprocates at the bottom end inside the filtering and precipitating cabinet 4 under the driving of the connecting rod 705, so that the sludge at the bottom end inside the filtering and precipitating cabinet 4 is cleaned to the bottom end of the groove 8, and then the sludge is discharged into the collecting tank 2 through the sewage discharge pipe 3, thereby realizing the cleaning operation of the filtering and precipitating cabinet 4.

The working principle is as follows: when the device is used, sewage is firstly discharged into the filtering and settling cabinet 4 through the input pipe 6, solid garbage is filtered in the filtering and settling cabinet 4 through the filtering of the filtering net 503, then the solid garbage is settled in the filtering and settling cabinet 4, if the filtering net 503 is blocked, the filtering net 503 is pulled up by rotating the first rotating rod 501 to pull the rope 502, then the second rotating rod 509 is rotated, the first threaded rod 504 is driven to rotate by the second rotating rod 509 to enable the first threaded block 506 to horizontally move, and because the scraper 508 is connected with the first threaded block 506 through the connecting block 505, the scraper 508 can perform cleaning work on the surface of the filtering net 503 to clean the solid garbage into the collecting groove 2, and because the connecting block 505 is provided with the spring block 507, the device can be suitable for better cleaning the surface of the filtering net 503;

after the filtration and sedimentation cabinet 4 is subjected to standing sedimentation, a water pump 18 is started to pump sewage of the filtration and sedimentation cabinet 4 into the stirring cabinet 15 through a water inlet pipe 20 and a water outlet pipe 19, then a servo motor 706 is started, a second threaded rod 701 and a third threaded rod 704 are driven to rotate by the servo motor 706, so that a second threaded block 702 and a third threaded block 707 perform reciprocating movement, a movable plate 703 performs reciprocating movement at the bottom end inside the filtration and sedimentation cabinet 4 under the driving of a connecting rod 705 due to the movement of the second threaded block 702 and the third threaded block 707, sludge at the bottom end inside the filtration and sedimentation cabinet 4 is cleaned to the bottom end of a groove 8, and then the sludge is discharged into a collecting tank 2 through a sewage discharge pipe 3, so that the cleaning work of the filtration and sedimentation cabinet 4 is realized;

after sewage enters the stirring cabinet 15, corresponding medicaments are added, then the driving motor 16 is started, the stirring rod 17 is driven to perform sufficient stirring reaction, then treated water is discharged through the output pipe 14, the water quality sensor 11 detects that the discharged water reaches corresponding standards, the second electromagnetic valve 12 is started through the singlechip 22 to discharge and collect the water through the drain pipe 13, if the discharged water is detected to not reach the corresponding standards, the water quality sensor 11 opens the first electromagnetic valve 10 through the singlechip 22 to enable the water to enter the circulating pipe 9, then the water enters the input pipe 6 under the guide of the circulating pipe 9, and the water is treated again.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a sewage pretreatment device, includes box (1) and water pump (18), its characterized in that: the device also comprises an anti-blocking structure (5) capable of cleaning and preventing blockage, a cleaning structure (7) capable of removing precipitated sludge and a circulating structure capable of automatically detecting the pretreatment degree of sewage and circularly treating;

a driving motor (16) is installed at the bottom end of the box body (1), a collecting tank (2) is installed at one side of the inner bottom end of the box body (1), a stirring cabinet (15) is installed at the other side of the inner bottom end of the box body (1), and the bottom end in the stirring cabinet (15) is provided with a turntable (21) through a bearing, the output end of the driving motor (16) penetrates through the box body (1) and the bottom end of the stirring cabinet (15) to be connected with the turntable (21), and the top end of the turntable (21) is uniformly provided with a stirring rod (17), the top end of the stirring cabinet (15) is provided with a filtering and precipitating cabinet (4), a groove (8) is arranged at the bottom end inside the filtering and settling cabinet (4), a sewage discharge pipe (3) is arranged at one side of the groove (8), one end of the drain pipe (3) penetrates through one side of the filtering and precipitating cabinet (4), and the cleaning structures (7) are arranged at the front end and the rear end inside the groove (8);

an input pipe (6) is installed at the top end of the box body (1), one end of the input pipe (6) penetrates through the top end of the box body (1) and extends into the filtering and precipitating cabinet (4), and the anti-blocking structure (5) is installed at the upper ends of two sides in the filtering and precipitating cabinet (4);

a water pump (18) is installed in the middle of one end of the box body (1), the input end of the water pump (18) is connected with a water inlet pipe (20), one end of the water inlet pipe (20) penetrates through the box body (1) and one end of the filtering and precipitating cabinet (4) and extends into the filtering and precipitating cabinet (4), the output end of the water pump (18) is connected with a water outlet pipe (19), one end of the water outlet pipe (19) penetrates through the box body (1) and one end of the stirring cabinet (15) and extends into the stirring cabinet (15), and the circulating structure is installed on one side, close to the stirring cabinet (15), of the box body (1);

circulation structure still includes output tube (14), the bottom in agitator cabinet (15) inside is installed in output tube (14), and the one end of output tube (14) runs through agitator cabinet (15) and box (1) one side, water quality sensor (11) are installed to the one end of output tube (14), and the bottom of output tube (14) is connected with drain pipe (13), state second solenoid valve (12) are installed to the bottom of drain pipe (13), circulating pipe (9) are installed on the top of output tube (14), just first solenoid valve (10) are installed to the bottom of circulating pipe (9), box (1) are close to intermediate position department on circulating pipe (9) one side and install singlechip (22).

2. The sewage pretreatment apparatus according to claim 1, wherein: the anti-blocking structure (5) comprises a first rotating rod (501), ropes (502), a filter screen (503), a first threaded rod (504), a connecting block (505), a first threaded block (506), a spring block (507), a scraper (508), a second rotating rod (509) and a guide wheel (510), wherein the first rotating rod (501) is installed on the filtering and precipitating cabinet (4), the guide wheel (510) is installed at the top end, close to one side of the first rotating rod (501), of the filtering and precipitating cabinet (4), the filter screen (503) is arranged inside the filtering and precipitating cabinet (4), one end of the first rotating rod (501) is connected with the two ropes (502), the other end of each rope (502) is attached to the guide wheel (510) and is respectively connected with two sides of the filter screen (503), the top ends of two sides inside the box body (1) are provided with the first threaded rod (504) through bearings, and the outer wall of the first threaded rod (504) is sleeved with the first threaded block (506), connecting block (505) is installed to the bottom of first screw thread piece (506), and spring block (507) is installed on the inside top of connecting block (505), scraper blade (508) are installed to the bottom of spring block (507), and the one end through connection piece (505) bottom of scraper blade (508), second dwang (509) are installed to one side of box (1), and the one end of second dwang (509) runs through box (1) one side and is connected with first threaded rod (504).

3. The sewage pretreatment apparatus according to claim 1, wherein: the cleaning structure (7) comprises a second threaded rod (701), a second threaded block (702), a movable plate (703), a third threaded rod (704), a connecting rod (705), a servo motor (706) and a third threaded block (707), the third threaded rod (704) is installed at one end inside the groove (8) through a bearing, the outer wall of the third threaded rod (704) is sleeved with the third threaded block (707), the servo motor (706) is installed at one end of the box body (1), the output end of the servo motor (706) penetrates through the box body (1) and the filtering and settling cabinet (4) to be connected with the third threaded rod (704), the second threaded rod (701) is installed at the other end inside the groove (8) through a bearing, the second threaded block (702) is sleeved on the outer wall of the second threaded rod (701), one end of the second threaded rod (701) is connected with one end of the third threaded rod (704), two sides of the bottom end in the filtering and settling cabinet (4) are respectively provided with a movable plate (703), one side of the movable plate (703) is hinged with two connecting rods (705) through hinges, and the connecting rods (705) are respectively hinged with a second thread block (702) and a third thread block (707) through hinges.

4. A sewage pretreatment device according to claim 3, characterized in that: the thread of the second threaded rod (701) is opposite to the thread of the third threaded rod (704).

5. The sewage pretreatment apparatus according to claim 2, wherein: the filter screen (503) is concave, and the filter screen (503) is connected with the filtering and settling cabinet (4) in a sliding manner.

6. The sewage pretreatment apparatus according to claim 1, wherein: the output end of the water quality sensor (11) is electrically connected with the input end of the single chip microcomputer (22), and the output end of the single chip microcomputer (22) is electrically connected with the first electromagnetic valve (10) and the second electromagnetic valve (12).