CN115025527A - A sewage treatment device and sewage treatment method - Google Patents

Abstract

The invention relates to the technical field of sewage treatment, and discloses a sewage treatment device and a sewage treatment method, wherein the sewage treatment device comprises a shell, the shell is provided with the sewage treatment device, the sewage treatment device is provided with a water inlet pipeline and a water outlet pipeline, and the water inlet pipeline and the water outlet pipeline are respectively provided with a valve mechanism for controlling the opening and the closing of the water inlet pipeline and the water outlet pipeline; the valve mechanism comprises two valve grooves which are respectively arranged on the water inlet pipeline and the water outlet pipeline, and valve plates are arranged in the two valve grooves in a sliding manner; the shell is provided with a driving mechanism for respectively driving the two valve mechanisms to operate, the driving mechanism comprises a motor arranged on the shell, a first screw rod is arranged on the motor, and a second screw rod is rotatably arranged on the shell; according to the sewage treatment device and the sewage treatment method, the traditional valve mechanism consisting of the valve groove and the valve plate can automatically cooperate with each other to control the opening and closing of the water inlet pipeline and the water outlet pipeline so as to facilitate sewage treatment through the arrangement of the driving mechanism.

Description

A sewage treatment device and sewage treatment method

technical field

The invention relates to the technical field of sewage treatment, in particular to a sewage treatment device and a sewage treatment method.

Background technique

Sewage treatment refers to the process of purifying sewage so that it can meet the water quality requirements for discharge into a water body or for reuse. Sewage treatment is widely used in construction, agriculture, transportation, energy, petrochemical, environmental protection, urban landscape, medical, catering and other fields. According to the classification of sewage sources, sewage treatment is generally divided into production sewage treatment and domestic sewage treatment. Production sewage includes industrial sewage, agricultural sewage and medical sewage, while domestic sewage is sewage produced in daily life, which refers to a complex mixture of various forms of inorganic and organic substances. There are many methods for treating sewage, which can generally be classified into physical methods, chemical methods and biological methods.

The existing various sewage treatment devices use mechanical valves and non-solenoid valves to control the opening and closing of the inlet and outlet pipes. Such valves lack an intelligently controlled opening and closing device to control the opening and closing of the inlet and outlet pipes. Cooperate with opening and closing to facilitate sewage treatment.

SUMMARY OF THE INVENTION

The invention provides a sewage treatment device and a sewage treatment method, which have the beneficial effect of enabling the positive and negative operation of the motor to realize the coordinated opening and closing of the water inlet pipe and the water outlet pipe through the setting of the transmission structure, so as to improve the efficiency of sewage treatment. The existing various sewage treatment devices mentioned in the above background technology, the water inlet pipe and the water outlet pipe part use mechanical valve non-solenoid valve to control the opening and closing, this kind of valve lacks a kind of intelligent control opening and closing equipment To control the opening and closing of the water inlet pipe and the water outlet pipe, so as to facilitate the problem of sewage treatment.

The present invention provides the following technical solutions: a sewage treatment device, comprising a casing, the casing is provided with a sewage treatment device, the sewage treatment device is provided with a water inlet pipe and a water outlet pipe, the water inlet pipe and all the The water outlet pipes are all provided with valve mechanisms to control their opening and closing;

The valve mechanism includes two valve grooves, the two valve grooves are respectively opened on the water inlet pipe and the water outlet pipe, and valve plates are slidably arranged in the two valve grooves;

The casing is provided with a driving mechanism for respectively driving the two valve mechanisms to operate. The driving mechanism includes a motor arranged on the casing, the motor is provided with a first screw rod, and the casing is provided with a first screw rod. A second screw rod is rotatably arranged on the body, and the two valve plates are respectively threadedly connected to the first screw rod and the second screw rod.

As an optional solution of the sewage treatment device of the present invention, wherein: the driving mechanism further includes a first gear arranged on the second screw rod, and a first rack is slidably arranged on the casing, The first rack is provided with a connecting plate, the connecting plate is provided with a second rack, and the second rack is engaged with the first gear.

As an optional solution of the sewage treatment device of the present invention, wherein: the driving mechanism further comprises a first rotating rod rotatably arranged on the sewage treatment device, and a second gear is disposed on the first rotating rod , and the second gear meshes with the first rack.

As an optional solution of the sewage treatment device of the present invention, wherein: the driving mechanism further includes a limit block disposed on the first rack, a limit groove is defined on the casing, and the The limiting block is slidably arranged in the limiting groove.

As an optional solution of the sewage treatment device of the present invention, wherein: the driving mechanism further includes a third gear arranged on the first screw rod, and a second rotating rod is rotatably arranged on the casing, A fourth gear is arranged on the second rotating rod, and the fourth gear is meshed with the third gear, and the second rotating rod is connected with the first rotating rod.

As an optional solution of the sewage treatment device of the present invention, wherein: the driving mechanism further comprises a ratchet wheel arranged on the second rotating rod, a connecting plate is provided on the first rotating rod, and the connecting A pawl is rotatably arranged on the disc, and the pawl is engaged with the ratchet wheel, and a spring sheet is arranged on the connecting disc.

As an optional solution of the sewage treatment device of the present invention, wherein: the sewage treatment device is provided with a filter mechanism, and the filter mechanism includes a filter pipe and a filter plate arranged on the sewage treatment device.

As an optional solution of the sewage treatment device of the present invention, wherein: the filtering mechanism further includes a connecting piece slidably arranged on the sewage treatment device, and the connecting piece is connected with the first rack, the A fixed push plate is movably hinged on the connecting piece through a hinge shaft, and two movable push plates are slidably arranged on the fixed push plate.

As an optional solution of the sewage treatment device of the present invention, the filtering mechanism further includes two springs, one end of the two springs is respectively connected with the two movable push plates, and the other end of the two springs is connected to the two movable push plates respectively. One end is connected with the fixed push plate.

The present invention also provides the following technical solutions: a sewage treatment method for a sewage treatment device, comprising the following steps:

S1. First, when the sewage is not injected into the sewage treatment device, the water inlet pipe is in a closed state, and the water outlet pipe is in an open state. At this time, the first screw rod is driven to rotate by the operation of the motor, and the first screw rod in turn drives the water inlet pipe. The displacement of the valve plate opens the water inlet pipe, while the reverse displacement of the valve plate in the water outlet pipe closes the water outlet pipe, and then the sewage is injected into the sewage treatment device through the water inlet pipe;

S2. When the sewage is injected, some impurities with larger particles will be filtered by the filter plate first. After the sewage is injected, the valve plate located in the water inlet pipe will be displaced by the reverse operation of the motor to close the water inlet pipe, and the water outlet pipe will remain closed, and then the sewage is treated by the sewage treatment device;

S3. After the sewage treatment is completed, the water inlet pipe and the water outlet pipe are opened by the operation of the motor, so that the filtered water is discharged through the water outlet pipe, and then the motor is operated in reverse to drive the water inlet pipe to be closed to restore the device for the next sewage treatment. , and during this process, the connecting piece moves back and forth with the first rack, which will drive the fixed push plate and the two movable push plates to discharge the impurities filtered on the filter plate through the filter pipe.

The present invention has the following beneficial effects:

1. In the sewage treatment device and the sewage treatment method, through the setting of the driving mechanism, the traditional valve mechanism composed of the valve groove and the valve plate can automatically cooperate to control the opening and closing of the water inlet pipe and the water outlet pipe for the convenience of sewage treatment. When the sewage does not enter the sewage treatment device, the water inlet pipe is in a closed state, and the water outlet pipe is in an open state. At this time, the water inlet pipe can be opened for sewage injection by running the motor, and the water outlet pipe is closed. After the sewage injection is completed When sewage treatment is carried out, the water inlet pipe is closed by the reverse operation of the motor, while the outlet pipe is kept closed. Then the motor runs in reverse and closes the water inlet pipe to restore the device for the next sewage treatment process.

2. In the sewage treatment device and the sewage treatment method, before the sewage enters the sewage treatment device for sewage treatment, the impurities with larger particles are filtered through the filter plate, and the fixed push plate is used to slide back and forth along the surface of the filter plate. To push impurities into the filter pipe in time and discharge to avoid clogging. A movable push plate is slidably installed in the front and rear openings of the fixed push plate, and the two movable push plates are elastically connected with the fixed push plate through two springs, and the two springs are in a compressed state. Therefore, when the fixed push plate reciprocates left and right, the two movable push plates will automatically expand and contract with the inner wall of the sewage treatment device, thereby pushing all the impurities on the circular filter plate into the filter pipe.

3. The sewage treatment device and the sewage treatment method, when the motor is running forward and reverse, are set through the one-way transmission of the ratchet wheel, the connecting plate, the pawl and the spring sheet, so that the first rotating rod can only rotate in one direction, and the second gear rotates only in one direction. Intermittently meshing with the upper and lower teeth of the first rack can drive the first rack to reciprocate. And the first rack is fixed with the connecting piece, so the fixed push plate will reciprocate left and right linear motion under the driving of the motor. And in order to prevent the sewage from being discharged with the filter pipe, the filter pipe is set higher than the filter plate, and the inner wall of the sewage treatment device close to the filter pipe is set to be inclined upward, and the fixed push plate is hinged on the connector. , which can automatically rotate with the inclined wall to push impurities into the filter pipe.

Description of drawings

FIG. 1 is a schematic diagram of the overall structure of the present invention.

Figure 2 is a schematic diagram of the overall explosion structure of the present invention.

3 is a schematic diagram of a first partial explosion structure of the present invention.

FIG. 4 is a schematic diagram of a second partial explosion structure of the present invention.

FIG. 5 is a schematic diagram of the first internal structure of the present invention.

FIG. 6 is a partial enlarged view of A in FIG. 5 .

FIG. 7 is a partial enlarged view of B in FIG. 5 .

FIG. 8 is a schematic diagram of the second internal structure of the present invention.

In the figure: 1, shell; 2, sewage treatment device; 201, water inlet pipe; 202, water outlet pipe; 3, valve mechanism; 301, valve groove; 302, valve plate; 4, driving mechanism; 401, motor; 402 403, the second screw; 404, the first gear; 405, the first rack; 406, the connecting plate; 407, the second rack; 408, the first lever; 409, the second gear 410, limit block; 411, limit slot; 412, third gear; 413, second lever; 414, fourth gear; 415, ratchet; 416, connecting plate; 417, pawl; 418, spring plate 5. Filtering mechanism; 501, connecting piece; 502, fixed push plate; 503, movable push plate; 504, spring; 505, filter pipe; 506, filter plate.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Example 1

In order to realize the coordinated opening and closing of the water inlet pipe 201 and the water outlet pipe 202, Embodiment 1 is proposed;

Please refer to FIG. 1 to FIG. 8 , including a casing 1, a sewage treatment device 2 is arranged on the casing 1, and a water inlet pipe 201 and a water outlet pipe 202 are arranged on the sewage treatment device 2. The water inlet pipe 201 and the water outlet pipe 202 are both A valve mechanism 3 is provided to control its opening and closing;

The valve mechanism 3 includes two valve grooves 301, the two valve grooves 301 are respectively opened on the water inlet pipe 201 and the water outlet pipe 202, and a valve plate 302 is slidably arranged in the two valve grooves 301;

The casing 1 is provided with a driving mechanism 4 for driving the two valve mechanisms 3 to operate respectively. The driving mechanism 4 includes a motor 401 arranged on the casing 1. The motor 401 is provided with a first lead screw 402, which rotates on the casing 1. A second screw rod 403 is provided, and the two valve plates 302 are respectively screwed to the first screw rod 402 and the second screw rod 403 .

Among them, the sewage treatment device 2 is installed on the housing 1, and the sewage treatment device 2 can be various types of sewage treatment devices, such as MA515 domestic sewage purification equipment. The water inlet pipe 201 and the water outlet pipe 202 are installed on the sewage treatment device 2. The water inlet pipe 201 and the water outlet pipe 202 are both provided with valve grooves 301, and valve plates 302 are slidably installed in the two valve grooves 301. The valve plates 302 slide back and forth along the two valve grooves 301 respectively, and can control the opening and closing of the water inlet pipe 201 and the water outlet pipe 202 .

When the sewage does not enter the sewage treatment device 2 through the water inlet pipe 201 for sewage treatment, the valve plate 302 on the upper side is in the state of closing the water inlet pipe 201, and the valve plate 302 on the lower side is in the state of opening the water inlet pipe 201 .

A motor 401 is installed on the side end of the housing 1 , a first screw rod 402 is coaxially fixed on the output shaft of the motor 401 , and the valve plate 302 on the upper side is threadedly connected to the first screw rod 402 and passes through the valve groove 301 The limiting action of the valve plate 302 realizes the displacement of the valve plate 302 . A second screw rod 403 is also rotatably mounted on the side end of the housing 1 , and the valve plate 302 on the lower side is threadedly connected to the second screw rod 403 .

The first screw rod 402 is driven to rotate by the operation of the motor 401, and the second screw rod 403 is driven to rotate by transmission, so that the front and rear displacement of the two valve plates 302 can be realized.

Example 2

In order to realize that the water inlet pipe 201 is opened and the outlet pipe 202 is closed when the sewage is injected, when the sewage treatment is completed, the inlet pipe 201 is closed and the outlet pipe 202 is kept closed, and the outlet pipe 202 is opened when the filtered water is discharged. Example 2;

This embodiment is an improved description made on the basis of Embodiment 1. For details, please refer to FIG. 1 to FIG. 6 . The driving mechanism 4 further includes a first gear 404 arranged on the second screw rod 403 . The housing 1 A first rack 405 is slidably arranged on the upper side, a connecting plate 406 is arranged on the first rack 405, a second rack 407 is arranged on the connecting plate 406, and the second rack 407 meshes with the first gear 404;

The driving mechanism 4 also includes a first rotating rod 408 rotatably arranged on the sewage treatment device 2, a second gear 409 is provided on the first rotating rod 408, and the second gear 409 meshes with the first rack 405;

The drive mechanism 4 further includes a limit block 410 disposed on the first rack 405, a limit slot 411 is defined on the housing 1, and the limit block 410 is slidably arranged in the limit slot 411;

The driving mechanism 4 also includes a third gear 412 disposed on the first screw rod 402 , a second rotating rod 413 is rotatably disposed on the housing 1 , a fourth gear 414 is disposed on the second rotating rod 413 , and the fourth gear 414 Meshing with the third gear 412, the second rotating rod 413 is connected with the first rotating rod 408;

The driving mechanism 4 also includes a ratchet wheel 415 arranged on the second rotating rod 413 , a connecting plate 416 is disposed on the first rotating rod 408 , and a pawl 417 is rotatably provided on the connecting plate 416 , and the pawl 417 is engaged with the ratchet wheel 415 to connect A spring plate 418 is provided on the disc 416 .

Wherein, a third gear 412 is fixed on the surface of the first screw rod 402, a fourth gear 414 is rotatably installed on the side end of the housing 1 between the motor 401 and the second screw rod 403, and the motor 401, the second screw The rod 413 and the second screw rod 403 are linearly distributed up and down, a fourth gear 414 is fixed on the surface of the second rotating rod 413, the fourth gear 414 meshes with the third gear 412, and the third gear 412 and the fourth gear 414 The gear ratio is 2:1.

A first rotating rod 408 is rotatably installed on the side end of the sewage treatment device 2 , a connecting plate 416 is coaxially fixed on the first rotating rod 408 , a ratchet 415 is coaxially fixed on the second rotating rod 413 , and the connecting plate 416 rotates on it. Two pawls 417 are installed, both of which are engaged with the ratchet 415 , and two spring pieces 418 are also installed on the side wall of the connecting plate 416 . The two pawls 417 are pressed against the ratchet wheel 415 by the two spring pieces 418 .

A second gear 409 is fixed on the surface of the first rotating rod 408 , the second gear 409 is a half gear, a limiting groove 411 is formed on the upper inner wall of the housing 1 , and a limiting block 410 is slidably installed in the limiting groove 411 to limit the The block 410 and the limiting slot 411 are both T-shaped. A first rack 405 is fixed at the lower end of the limiting block 410 . The first rack 405 is an annular rack with linear teeth distributed on its upper and lower inner walls.

A connecting plate 406 is fixed on the lower end of the first rack 405 , a second rack 407 is fixed on the lower end of the connecting plate 406 , a first gear 404 is fixed on the surface of the second screw 403 , the first gear 404 and the second tooth Strip 407 engages.

First, the motor 401 is operated to drive the first screw rod 402 and the third gear 412 to rotate, so that the valve plate 302 located on the upper side moves forward to open the water inlet pipe 201, and the third gear 412 rotates a quarter turn at this time. The second rotating rod 413 and the fourth gear 414 are driven to rotate for half a circle, and then the ratchet wheel 415 is driven to rotate. At this time, the rotation direction of the ratchet wheel 415 is opposite to the direction of the teeth of the pawl 417, and the two are stuck. At this time, the connecting plate 416 and the The first rotating rod 408 rotates along with the ratchet 415 . The first rotating rod 408 drives the second gear 409 to rotate, so that the first rack 405 moves to the left, which in turn drives the first gear 404 to rotate, so that the valve plate 302 on the lower side moves backward to close the water outlet pipe 202 .

Then the motor 401 runs in the reverse direction. At this time, the rotation direction of the ratchet wheel 415 is in line with the direction of the teeth of the pawl 417. The pawl 417 will continue to move under the action of the spring plate 418, but it will not affect the rotation of the ratchet wheel 415. The connecting plate 416 and the first rotating rod 408 will be driven to rotate, and the water outlet pipe 202 will remain closed.

When the motor 401 operates again to drive the upper valve plate 302 to move forward to open the water inlet pipe 201 , the second rack 407 moves to the right and drives the lower valve plate 302 to move forward to open the water outlet pipe 202 .

Example 3

In order to filter the impurities of larger particles in the sewage and discharge it out of the sewage treatment device 2 in time, Example 3 is proposed;

This embodiment is an improved description made on the basis of Embodiment 2. For details, please refer to FIG. 1 to FIG. 8 . The sewage treatment device 2 is provided with a filter mechanism 5 , and the filter mechanism 5 includes a filter mechanism 5 disposed on the sewage treatment device 2 The filter pipe 505 and the filter plate 506;

The filter mechanism 5 also includes a connecting piece 501 slidably arranged on the sewage treatment device 2, and the connecting piece 501 is connected with the first rack 405. A fixed push plate 502 is hinged on the connecting piece 501 through a hinge shaft. Two movable push plates 503 are provided on the slide;

The filter mechanism 5 further includes two springs 504 , one end of the two springs 504 is connected to the two movable push plates 503 respectively, and the other ends of the two springs 504 are both connected to the fixed push plate 502 .

Among them, a filter plate 506 is fixed on the inner wall of the sewage treatment device 2, a filter pipe 505 is fixed on the upper part of the filter plate 506 in the sewage treatment device 2, and the filter plate 506 in the sewage treatment device 2 faces the inner wall of the filter pipe 505 direction Set for sloped walls. A connecting piece 501 is fixed on the side end of the first rack 405, the connecting piece 501 slides left and right along the sewage treatment device 2, a fixed push plate 502 is fixed on the left end of the connecting piece 501, and the front and rear ends of the fixed push plate 502 are opened. A movable push plate 503 is slidably installed inside, and the two movable push plates 503 are connected to the fixed push plate 502 through two springs 504 respectively. The movable push plate 503 will automatically expand and contract under the elastic force of the two springs 504 , and discharge the filtered impurities into the filter pipe 505 for discharge.

Example 4

The invention also provides a sewage treatment method of the sewage treatment device;

Specifically, please refer to Figure 1-Figure 8, including the following steps:

S1. First, when the sewage is not injected into the sewage treatment device 2, the water inlet pipe 201 is in a closed state, and the water outlet pipe 202 is in an open state. At this time, the operation of the motor 401 drives the first screw rod 402 to rotate, and the first screw rod 402 further drives the rotation of the first screw rod 402. The valve plate 302 located in the water inlet pipe 201 is displaced to open the water inlet pipe 201, while the valve plate 302 located in the water outlet pipe 202 is displaced in reverse to close the water outlet pipe 202, and then the sewage is injected into the sewage treatment device 2 through the water inlet pipe 201 ;

S2. When the sewage is injected, some impurities with larger particles will be filtered by the filter plate 506 first. After the sewage is injected, the reverse operation of the motor 401 drives the displacement of the valve plate 302 located in the water inlet pipe 201 to close the water inlet pipe 201. , and the outlet pipe 202 remains closed, and then the sewage is treated by the sewage treatment device 2;

S3. After the sewage treatment is completed, the water inlet pipe 201 and the water outlet pipe 202 are driven to open by the operation of the motor 401, so that the filtered water is discharged through the water outlet pipe 202, and then the motor 401 is reversely operated to drive the water inlet pipe 201 to be closed to restore the device. For the next sewage treatment, and during this process, the connecting piece 501 moves back and forth with the first rack 405, which will drive the fixed push plate 502 and the two movable push plates 503 to filter the impurities on the filter plate 506. Conduit 505 discharges.

It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any relationship between these entities or operations. any such actual relationship or sequence exists. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the technical principles of the present invention, several improvements and modifications can be made. These improvements and modifications It should also be regarded as the protection scope of the present invention.

Claims (10)

1. A sewage treatment device, characterized in that it comprises a casing (1), a sewage treatment device (2) is arranged on the casing (1), and a water inlet pipe is arranged on the sewage treatment device (2). (201) and a water outlet pipe (202), both the water inlet pipe (201) and the water outlet pipe (202) are provided with a valve mechanism (3) for controlling their opening and closing; The valve mechanism (3) includes two valve grooves (301), the two valve grooves (301) are respectively opened on the water inlet pipe (201) and the water outlet pipe (202), and the two valve grooves (301) are respectively opened on the water inlet pipe (201) and the water outlet pipe (202). A valve plate (302) is slidably arranged in the valve groove (301); The casing (1) is provided with a driving mechanism (4) for respectively driving the two valve mechanisms (3) to operate, and the driving mechanism (4) comprises a motor arranged on the casing (1). (401), the motor (401) is provided with a first screw rod (402), the housing (1) is rotatably provided with a second screw rod (403), and the two valve plates (302) are respectively The screw is connected to the first screw rod (402) and the second screw rod (403). 2 . The sewage treatment device according to claim 1 , wherein the driving mechanism ( 4 ) further comprises a first gear ( 404 ) arranged on the second screw rod ( 403 ), and the housing (1) A first rack (405) is slidably arranged on the top, a connecting plate (406) is arranged on the first rack (405), and a second rack (407) is arranged on the connecting plate (406) , and the second rack (407) meshes with the first gear (404). 3. The sewage treatment device according to claim 1 or 2, wherein the driving mechanism (4) further comprises a first rotating rod (408) rotatably arranged on the sewage treatment device (2), so that the A second gear (409) is provided on the first rotating rod (408), and the second gear (409) meshes with the first rack (405). 4. The sewage treatment device according to any one of claims 1-3, wherein the driving mechanism (4) further comprises a limit block (410) disposed on the first rack (405) , a limiting groove (411) is provided on the casing (1), and the limiting block (410) is slidably arranged in the limiting groove (411). 5. The sewage treatment device according to any one of claims 1-4, wherein the driving mechanism (4) further comprises a third gear (412) arranged on the first screw rod (402) A second rotating rod (413) is rotatably arranged on the housing (1), a fourth gear (414) is arranged on the second rotating rod (413), and the fourth gear (414) is connected to the The third gear (412) is engaged, and the second rotating rod (413) is connected with the first rotating rod (408). 6 . The sewage treatment device according to claim 5 , wherein the driving mechanism ( 4 ) further comprises a ratchet ( 415 ) arranged on the second rotating rod ( 413 ), and the first rotating rod (408) is provided with a connecting plate (416), a pawl (417) is rotatably provided on the connecting plate (416), and the pawl (417) is engaged with the ratchet (415), the connecting plate (416) is provided with a spring piece (418). 7. The sewage treatment device according to claim 1, characterized in that: the sewage treatment device (2) is provided with a filter mechanism (5), and the filter mechanism (5) comprises a filter mechanism (5) disposed in the sewage treatment device (2). 2) on the filter pipe (505) and filter plate (506). 8 . The sewage treatment device according to claim 7 , wherein the filter mechanism ( 5 ) further comprises a connecting piece ( 501 ) slidably arranged on the sewage treatment device ( 2 ), and the connecting piece (501) is connected to the first rack (405), and a fixed push plate (502) is movably hinged on the connecting piece (501) through a hinge shaft, and two movable push plates (502) are slidably arranged on the fixed push plate (502). plate (503). 9 . The sewage treatment device according to claim 8 , wherein the filter mechanism ( 5 ) further comprises two springs ( 504 ), and one end of the two springs ( 504 ) is respectively connected with the two movable push plates. 10 . (503) is connected, and the other ends of the two springs (504) are both connected to the fixed push plate (502). 10. The sewage treatment method of a sewage treatment plant according to any one of claims 1-9, characterized in that, comprising the steps of: S1. First, when the sewage is not injected into the sewage treatment device (2), the water inlet pipe (201) is in a closed state, and the water outlet pipe (202) is in an open state. At this time, the first screw rod (402) is driven by the operation of the motor (401). ) rotates, the first screw rod (402) further drives the valve plate (302) located in the water inlet pipe (201) to displace to open the water inlet pipe (201), and at the same time the valve plate (302) located in the water outlet pipe (202) Reverse displacement closes the water outlet pipe (202), and then injects the sewage into the sewage treatment device (2) through the water inlet pipe (201); S2. When the sewage is injected, some impurities with larger particles will be filtered by the filter plate (506) first. After the sewage is injected, the motor (401) will run in reverse to drive the valve plate ( 302) Displacement closes the water inlet pipe (201), while the water outlet pipe (202) is kept closed, and then the sewage is treated by the sewage treatment device (2); S3. After the sewage treatment is completed, the water inlet pipe (201) and the water outlet pipe (202) are driven to open by the operation of the motor (401), so that the filtered water is discharged through the water outlet pipe (202), and then the motor (401) is driven in the reverse direction. When the water inlet pipe (201) is closed, the device can be restored for the next sewage treatment, and during this process, the connecting piece (501) moves back and forth with the first rack (405), which drives the fixed push plate (502) and two movable push plates (503) to discharge the impurities filtered on the filter plate (506) through the filter pipe (505).

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