CN113968660A

CN113968660A - Constructed wetland sewage treatment plant

Info

Publication number: CN113968660A
Application number: CN202111130578.5A
Authority: CN
Inventors: 陶明花
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-09-26
Filing date: 2021-09-26
Publication date: 2022-01-25

Abstract

The invention discloses an artificial wetland sewage treatment device which comprises a shell, wherein the top of the shell is communicated with a water inlet pipe for sewage to enter, the inner top of the shell is provided with a pretreatment mechanism for treating garbage in sewage, the outer wall of the shell, which is close to the bottom, is communicated with a drain pipe for draining water, the pretreatment mechanism comprises a filter plate, and a cutting mechanism for cutting garbage is connected among a first fixed plate, a first movable plate, a second movable plate and a third movable plate. According to the garbage collecting device, the rectangular area formed by the first movable plate, the second movable plate, the third movable plate and the first fixed plate is reduced, and the cutting mechanism is matched, so that large garbage can be cut, meanwhile, the cut garbage can be concentrated and extruded, and the moisture can be extruded conveniently, so that the treatment efficiency is greatly improved.

Description

Constructed wetland sewage treatment plant

Technical Field

The invention relates to the technical field of artificial wetlands, in particular to an artificial wetland sewage treatment device.

Background

The artificial wetland is a technology for treating sewage and sludge by using a ground similar to a marshland and which is artificially constructed and operated under control to be thrown into the artificially constructed wetland, wherein the sewage and the sludge mainly utilize the physical, chemical and biological triple synergistic effects of soil, artificial media, plants and microorganisms in the process of flowing in a certain direction.

Disclosure of Invention

The invention aims to provide an artificial wetland sewage treatment device, which can cut large garbage by reducing a rectangular area formed by a first movable plate, a second movable plate, a third movable plate and a first fixed plate and matching with a cutting mechanism, and can concentrate and extrude the cut garbage to facilitate the extrusion of water, thereby greatly improving the treatment efficiency and solving the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the artificial wetland sewage treatment device comprises a shell, wherein the top of the shell is communicated with a water inlet pipe for sewage to enter, the inner top of the shell is provided with a pretreatment mechanism for treating garbage in sewage, and the outer wall of the shell, which is close to the bottom, is communicated with a drain pipe for draining water;

the pretreatment mechanism comprises a filter plate which is fixedly connected with the inner top of the shell through a connecting frame, the upper surface of the filter plate is provided with a fixed first fixed plate, a movable first movable plate, a second movable plate and a third movable plate, the first fixed plate, the first movable plate, the second movable plate and the third movable plate are distributed in a rectangular array, and the adjacent ends of the first fixed plate, the first movable plate, the second movable plate and the third movable plate are arranged in a staggered manner, the side wall of the filter plate where the third movable plate is located is connected with a first driving mechanism which is used for the third movable plate to move in parallel with the direction of the first fixed plate, the side wall of the filter plate where the first movable plate is located is connected with a second driving mechanism which is used for the first movable plate to move in parallel and in the direction of a third movable plate, and a cutting mechanism for cutting garbage is connected among the first fixed plate, the first movable plate, the second movable plate and the third movable plate.

Preferably, the cutting mechanism includes two first installation pieces, one of them first installation piece fixed connection is on the lateral wall of first fixed plate, another first installation piece slidable mounting is on the lateral wall of first fly leaf, two be connected with the four-bar linkage between the first installation piece, the inboard of four-bar linkage all is provided with the blade, the logical groove that is used for the four-bar linkage to pass through is seted up to the lateral wall of second fly leaf and third fly leaf.

Preferably, the filter lateral wall at second fly leaf place is connected with and is used for rubbish to retrieve the mechanism, rubbish is retrieved the mechanism and is included first extension strip, first extension strip fixed mounting is on the lateral wall of filter, the inside slidable mounting of first extension strip has the movable block, be connected with the second spring between movable block and the first extension strip, the lateral wall that the second spring was kept away from to the movable block passes through the dead lever and fixes with the lateral wall of second fly leaf, the movable block passes through connecting strip fixedly connected with baffle, offer the rectangular channel that is used for rubbish discharge on the filter, the baffle sets up the below at the rectangular channel, surface movable mounting has the rubbish collection frame that is used for accepting rubbish under the filter.

Preferably, the first driving mechanism comprises a second extension strip and a first electric telescopic rod arranged on the second extension strip, the second extension strip is fixedly connected to the side wall of the filter plate, the output end of the first electric telescopic rod is fixed to the third movable plate, the second driving mechanism comprises a third extension strip and a second electric telescopic rod arranged on the third extension strip, the third extension strip is fixedly connected to the side wall of the filter plate, and the output end of the second electric telescopic rod is fixed to the first movable plate.

Preferably, the middle part of casing is connected with the mechanism of disinfecting that is used for disinfecting sewage, the mechanism of disinfecting includes two rollers that disinfect, two the roller that disinfect is installed on the inner wall of casing through installation hub rotation respectively, the water inlet that is used for sewage to get into is seted up to the roller outer wall that disinfects, the inside bactericidal ball that is used for disinfecting sewage that is provided with of roller that disinfects, the lateral wall of casing is connected with and is used for making a round trip to pivoted drive mechanism two rollers that disinfect.

Preferably, drive mechanism includes two first gears and rack, two first gear difference fixed connection is in the one end of two stoppers, the casing lateral wall fixedly connected with slide rail at first gear place, slidable mounting has the slider on the slide rail, be connected with first spring between slider and the slide rail bottom, fixedly connected with and first gear engagement's rack on the slider, the top of rack is connected with the stay cord, the one end that the rack was kept away from to the stay cord extends to inside the casing and through second installation piece and first electric telescopic handle fixed connection.

Preferably, the inner wall fixedly connected with that the casing is close to the below is used for secondary filter's filter screen, the shells inner wall of filter screen top is connected with the mechanism of striking off that is used for scraping mud to the filter screen surface, strike off the mechanism and include the lead screw, the lead screw rotates and installs on the lateral wall of casing, the outer wall fixed connection of casing is used for casing pivoted motor, threaded connection has the rod cover on the lead screw, the spacing of shells inner wall fixedly connected with of rod cover below, slidable mounting has the stopper on the spacing, the stopper is fixed with the rod cover, stopper below fixedly connected with is used for scraping the scraper blade of mud.

Preferably, the filter screen lateral wall inside the casing rotates through the round pin axle and installs out the flitch, the shells inner wall fixedly connected with second fixed plate of play flitch below, be connected with the third spring between second fixed plate and the play flitch.

Preferably, the upper portion fixedly connected with mounting bracket of rod cover, slidable mounting has two third installation pieces, two on the mounting bracket fixedly connected with spacing collar between the third installation piece, the spacing collar sets up in the interval between two sterilization rollers, two third installation piece back fixedly connected with is used for going out the depression bar that the flitch pushed down, fixedly connected with baffle between the bottom in the lower surface of filter screen and the casing.

Preferably, the detachable observation plate is slidably mounted on the outer wall of the shell corresponding to the garbage collection frame.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, through the arranged pretreatment mechanism, when the first movable plate and the third movable plate move, the reduction of a rectangular area formed by the first movable plate, the second movable plate, the third movable plate and the first fixed plate can be further realized by matching with the sliding action of the second movable plate, and the cutting of large garbage can be realized by matching with the arranged cutting mechanism.

2. According to the garbage collection frame, due to the arranged garbage recovery mechanism, when the first movable plate, the second movable plate and the third movable plate are reduced to the baffle area, the second movable plate can further move to further realize that the first extending strip moves in the movable block and compresses the second spring, the baffle can be further driven to be separated from the upper side of the garbage collection frame through the connection effect of the connecting strip, and the compressed garbage can fall into the garbage collection frame to realize the collection process.

3. According to the invention, through the two sterilizing rollers, pretreated sewage is poured into the sterilizing rollers through the water inlet holes formed in the surfaces of the sterilizing rollers, at the moment, the sewage can be sterilized and disinfected through the sterilizing balls arranged in the sterilizing rollers, and when the third movable plate is driven to move through the first electric telescopic rod, due to the connection effect of the pull rope and the elastic connection effect of the first spring, the rack can be further driven to move up and down, and due to the meshing transmission between the rack and the first gear, the first gear can be further driven to rotate back and forth, so that the two sterilizing rollers can rotate back and forth, and the treatment efficiency of sewage sterilization and disinfection can be improved.

4. The invention can carry out secondary filtration on the treated sewage through the arranged filter screen, silt in the sewage can be accumulated on the upper surface of the filter screen, the screw rod can be further driven to rotate through the work of the driving motor, the rod sleeve can be further driven to move back and forth due to the threaded connection of the screw rod and the rod sleeve, so that the scraper blade can be scraped, the silt can be conveniently scraped to the upper surface of the discharging plate, when the limiting ring is driven to move through the limiting ring and the rod sleeve arranged on the mounting rack in a sliding way, the limiting ring can gradually move downwards due to the inclined surface effect of the two sterilizing rollers, when the limiting ring is close to the discharging plate and continues to move, the pressure rod can be enabled to move towards one end close to the discharging plate and simultaneously downwards extrude the discharging plate, so that the discharging plate is inclined and compresses the third spring, and at the moment, the silt can be discharged through the inclined discharging plate and fall on the other side of the shell for collection, the processing efficiency is further improved.

Drawings

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

FIG. 2 is a schematic side view of the present invention;

FIG. 3 is a schematic view of the cross-sectional structure of C-C of the present invention;

FIG. 4 is a schematic view of the cross-sectional structure of the present invention in D-D;

FIG. 5 is a schematic view of the cross-sectional structure of F-F of the present invention;

FIG. 6 is a schematic view of the cross-sectional structure of G-G of the present invention;

FIG. 7 is a schematic diagram of a G-G three-dimensional cross-sectional structure according to the present invention.

In the figure: 1. a water inlet pipe; 2. an observation plate; 3. a housing; 4. a drain pipe; 5. a motor; 6. a slide rail; 7. a first gear; 8. a first spring; 9. a slider; 10. a rack; 11. pulling a rope; 12. a filter plate; 13. a first extension bar; 14. a movable block; 15. a second spring; 16. a baffle plate; 17. a connecting strip; 18. a four-bar linkage; 19. a first mounting block; 20. a blade; 21. a first fixing plate; 22. a second mounting block; 23. a second extension bar; 24. a first electric telescopic rod; 25. a third extension bar; 26. a second electric telescopic rod; 27. a first movable plate; 28. a second movable plate; 30. a sterilizing roller; 31. a limiting ring; 32. a third mounting block; 33. a mounting frame; 34. a limiting block; 35. a squeegee; 36. a filter screen; 37. a partition plate; 38. a second fixing plate; 39. a third spring; 40. a limiting strip; 41. a lead screw; 43. installing a shaft; 44. a garbage collection frame; 45. a connecting frame; 46. a discharge plate; 47. a third movable plate; 48. a rod sleeve; 49. a pressure lever.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 7, the present invention provides a technical solution: an artificial wetland sewage treatment device comprises a shell 3, wherein the top of the shell 3 is communicated with a water inlet pipe 1 for sewage to enter, the inner top of the shell 3 is provided with a pretreatment mechanism for treating garbage in sewage, and the outer wall of the shell 3 close to the bottom is communicated with a drain pipe 4 for draining water;

the pretreatment mechanism comprises a filter plate 12, the filter plate 12 is fixedly connected to the inner top of the shell 3 through a connecting frame 45, the upper surface of the filter plate 12 is provided with a fixed first fixed plate 21 and a movable first movable plate 27, a second movable plate 28 and a third movable plate 47, the first fixed plate 21, the first movable plate 27, the second movable plate 28 and the third movable plate 47 are distributed in a rectangular array, the adjacent ends of the first fixed plate 21, the first movable plate 27, the second movable plate 28 and the third movable plate 47 are arranged in a staggered manner, the side wall of the filter plate 12 where the third movable plate 47 is located is connected with a first driving mechanism for the third movable plate 47 to move in the direction parallel to the first fixed plate 21, the side wall of the filter plate 12 where the first movable plate 27 is located is connected with a second driving mechanism for the first movable plate 27 to move in the direction parallel to the third movable plate 47, the side wall of the first fixed plate 21 is connected with a second driving mechanism for the first movable plate 27 to move in the direction parallel to the third movable plate 47, and the side wall of the filter plate 12 where the first movable plate 27 is located, A cutting mechanism for cutting the garbage is connected between the first flap 27, the second flap 28 and the third flap 47.

Through the pretreatment mechanism that sets up, when first movable plate 27 and third movable plate 47 take place the motion, the sliding action of cooperation second movable plate 28 can further realize that the rectangle region that first movable plate 27, second movable plate 28, third movable plate 47 and first fixed plate 21 constitute reduces to the cutting mechanism that the cooperation set up, can realize the cutting to large-scale rubbish, when first movable plate 27, second movable plate 28 and third movable plate 47 reduce to baffle 16 region, thereby can concentrate and realize the extrusion to the rubbish after the cutting, be convenient for extrude moisture, thereby very big improvement treatment effeciency.

Further, the cutting mechanism includes two first mounting blocks 19, one of the first mounting blocks 19 is fixedly connected to the side wall of the first fixing plate 21, the other first mounting block 19 is slidably mounted on the side wall of the first movable plate 27, a four-bar linkage 18 is connected between the two first mounting blocks 19, blades 20 are disposed on the inner sides of the four-bar linkage 18, and through grooves for the four-bar linkage 18 to pass through are formed in the side walls of the second movable plate 28 and the third movable plate 47.

By the cutting mechanism, when the first movable plate 27 approaches to one end close to the first fixed plate 21, the four-bar linkage 18 is compressed and causes the two ends to expand outwards and pass through the through slots where the second movable plate 28 and the third movable plate 47 are located, and at this time, the cutting of the large garbage can be realized by the approach between the blades 20.

Further, the side wall of the filter plate 12 where the second movable plate 28 is located is connected with a garbage collection mechanism, the garbage collection mechanism comprises a first extension strip 13, the first extension strip 13 is fixedly installed on the side wall of the filter plate 12, the inside sliding installation of the first extension strip 13 is provided with a movable block 14, the movable block 14 and the first extension strip 13 are connected with a second spring 15, the side wall of the movable block 14 far away from the second spring 15 is fixed with the side wall of the second movable plate 28 through a fixing rod, the movable block 14 is fixedly connected with a baffle 16 through a connecting strip 17, a rectangular groove for garbage discharge is formed in the filter plate 12, the baffle 16 is arranged below the rectangular groove, and a garbage collection frame 44 for receiving garbage is movably installed on the lower surface of the filter plate 12.

Through the garbage recycling mechanism, when the first movable plate 27, the second movable plate 28 and the third movable plate 47 are reduced to the area of the baffle 16, at this time, the movement of the second movable plate 28 can further realize the movement of the first extension bar 13 inside the movable block 14 and compress the second spring 15, and through the connection effect of the connection bar 17, the baffle 16 can be further driven to be separated from the upper side of the garbage collection frame 44, and the compressed garbage can fall into the garbage collection frame 44 at this time, so that the collection process is realized.

Further, the first driving mechanism comprises a second extension bar 23 and a first electric telescopic rod 24 arranged on the second extension bar 23, the second extension bar 23 is fixedly connected to the side wall of the filter plate 12, the output end of the first electric telescopic rod 24 is fixed to the third movable plate 47, the second driving mechanism comprises a third extension bar 25 and a second electric telescopic rod 26 arranged on the third extension bar 25, the third extension bar 25 is fixedly connected to the side wall of the filter plate 12, and the output end of the second electric telescopic rod 26 is fixed to the first movable plate 27.

The third movable plate 47 can be driven by the first electric telescopic rod 24 and the first movable plate 27 can be driven by the second electric telescopic rod 26.

Further, the middle part of casing 3 is connected with and is used for carrying out sterile mechanism of disinfecting to sewage, and the mechanism of disinfecting includes two rollers 30 that disinfect, and two rollers 30 that disinfect rotate through installation axle 43 respectively and install on the inner wall of casing 3, disinfect the roller 30 outer wall and offer the water inlet that is used for the sewage to get into, disinfect the inside ball that disinfects that is used for disinfecting sewage that is provided with of roller 30, and the lateral wall of casing 3 is connected with and is used for making a round trip the pivoted drive mechanism to two rollers 30 that disinfect.

Through two sterilization roller 30 that set up for inside the inlet opening that the sewage after the preliminary treatment was seted up through sterilization roller 30 surface pours into sterilization roller 30, at this moment, can disinfect the disinfection to sewage through the inside bactericidal ball that sets up of sterilization roller 30.

Further, drive mechanism includes two first gears 7 and rack 10, two first gears 7 are fixed connection respectively in the one end of two

stopper

34, 3 lateral wall fixedly connected with slide rails 6 of casing at first gear 7 place, slidable mounting has slider 9 on slide rail 6, be connected with first spring 8 between slider 9 and the 6 bottom of slide rail, fixedly connected with and the rack 10 of first gear 7 meshing on the slider 9, the top of rack 10 is connected with stay cord 11, the one end that rack 10 was kept away from to stay cord 11 extends to inside 3 casings and through second installation piece 22 and first electric telescopic handle 24 fixed connection.

When driving the third movable plate 47 to move through the first electric telescopic rod 24, due to the connection effect of the pull rope 11, the elastic connection effect of the first spring 8 is matched, so that the rack 10 can be further driven to move up and down, and the rack 10 and the first gear 7 are meshed for transmission, so that the first gear 7 can be further driven to rotate back and forth, the two sterilization rollers 30 can rotate back and forth, and the treatment efficiency of sewage sterilization and disinfection can be improved.

Further, the inner wall fixedly connected with that casing 3 is close to the below is used for secondary filter's

filter screen

36, 3 inner wall connections of casing above the filter screen 36 have and are used for scraping the mechanism that scrapes mud to the filter screen 36 surface, it includes lead screw 41 to strike off the mechanism, lead screw 41 rotates and installs on the lateral wall of casing 3, the outer wall fixed connection of casing 3 is used for casing 3 pivoted motor 5, threaded connection has rod cover 48 on the

lead screw

41, 3 inner wall fixedly connected with spacing strips 40 of casing below the rod cover 48, slidable mounting has stopper 34 on the spacing strips 40, stopper 34 is fixed with rod cover 48, stopper 34 below fixedly connected with is used for scraping the scraper blade 35 of mud.

Through the filter screen 36 that sets up, can carry out the secondary filter to the sewage after handling, silt in the sewage can gather at the upper surface of filter screen 36 this moment, and accessible driving motor 5 work this moment can further drive lead screw 41 and take place to rotate, because lead screw 41 and rod cover 48's threaded connection, can further drive rod cover 48 and take place the round trip movement to make scraper blade 35 take place to scrape, be convenient for scrape silt to the upper surface of play flitch 46.

Furthermore, a discharge plate 46 is rotatably mounted on the side wall of the filter screen 36 inside the housing 3 through a pin shaft, a second fixing plate 38 is fixedly connected to the inner wall of the housing 3 below the discharge plate 46, and a third spring 39 is connected between the second fixing plate 38 and the discharge plate 46.

Extrude flitch 46 downwards when being close to the one end motion of play flitch 46 through depression bar 49 to make play flitch 46 take place to incline and compress third spring 39, at this moment, silt alright discharge through the play flitch 46 of slope and fall to the opposite side of casing 3 and collect, further improved the treatment effeciency.

Further, the upper portion of the rod sleeve 48 is fixedly connected with the mounting frame 33, the two third mounting blocks 32 are mounted on the mounting frame 33 in a sliding mode, the limiting ring 31 is fixedly connected between the two third mounting blocks 32, the limiting ring 31 is arranged in the interval between the two sterilization rollers 30, the back faces of the two third mounting blocks 32 are fixedly connected with the pressing rods 49 used for pressing down the discharge plate 46, and the partition plate 37 is fixedly connected between the lower surface of the filter screen 36 and the bottom in the shell 3.

When the limiting ring 31 is driven by the rod sleeve 48 on the limiting ring 31 which is arranged on the mounting rack 33 in a sliding manner to move, the limiting ring 31 can gradually move downwards due to the inclined surface effect of the two sterilizing rollers 30, and when the limiting ring 31 is close to the discharging plate 46 and continues to move, the pressing rod 49 can be enabled to extrude the discharging plate 46 downwards while moving towards one end close to the discharging plate 46.

Further, the outer wall of the housing 3 corresponding to the garbage collection frame 44 is slidably mounted with the detachable observation plate 2.

Through the detachable observation board 2 that sets up, can conveniently take out the cleanness to rubbish collection frame 44.

The working principle is as follows: when the artificial wetland sewage treatment device is used, firstly, sewage to be treated is communicated with the inside of the device through a water inlet pipe 1, the second electric telescopic rod 26 and the first movable plate 27 can be driven to move at regular time through the arranged pretreatment mechanism, when the first electric telescopic rod 24 drives the third movable plate 47 to move and the second electric telescopic rod 26 drives the first movable plate 27 to move, the rectangular area formed by the first movable plate 27, the second movable plate 28, the third movable plate 47 and the first fixed plate 21 can be further reduced by matching with the sliding action of the second movable plate 28, and the arranged cutting mechanism is matched, when the first movable plate 27 approaches to one end close to the first fixed plate 21, the four connecting rods 18 are compressed, two ends of the four connecting rods are expanded outwards and penetrate through the through grooves where the second movable plate 28 and the third movable plate 47 are located, and at the moment, the cutting of large garbage can be realized through the approach between the blades 20, when the first movable plate 27, the second movable plate 28 and the third movable plate 47 are contracted to the area of the baffle 16, the cut garbage can be concentrated and squeezed, and the moisture can be squeezed out conveniently;

through the arranged garbage recycling mechanism, when the first movable plate 27, the second movable plate 28 and the third movable plate 47 are contracted to the area of the baffle 16, at this time, the movement of the second movable plate 28 can further realize that the first extending strip 13 moves in the movable block 14 and compresses the second spring 15, and through the connection action of the connecting strip 17, the baffle 16 can be further driven to be separated from the upper part of the garbage collecting frame 44, and at this time, the compressed garbage can fall into the garbage collecting frame 44;

through the two sterilizing rollers 30, pretreated sewage is poured into the sterilizing rollers 30 through the water inlet holes formed in the surfaces of the sterilizing rollers 30, at the moment, the sewage can be sterilized and disinfected through the sterilizing balls arranged in the sterilizing rollers 30, and when the third movable plate 47 is driven to move through the first electric telescopic rod 24, due to the connection effect of the pull rope 11, the rack 10 can be further driven to move up and down by matching with the elastic connection effect of the first spring 8, and due to the meshing transmission between the rack 10 and the first gear 7, the first gear 7 can be further driven to rotate back and forth, so that the two sterilizing rollers 30 can rotate back and forth;

through the arranged filter screen 36, the treated sewage can be secondarily filtered, silt in the sewage can be accumulated on the upper surface of the filter screen 36 at the moment, the screw rod 41 can be further driven to rotate through the work of the driving motor 5, the rod sleeve 48 can be further driven to move back and forth due to the threaded connection of the screw rod 41 and the rod sleeve 48, so that the scraping plate 35 is scraped, the silt is conveniently scraped to the upper surface of the discharge plate 46, when the limiting ring 31 is driven to move by the rod sleeve 48 on the limiting ring 31 which is arranged on the mounting rack 33 in a sliding way, the limiting ring 31 can gradually move downwards due to the inclined surface effect of the two sterilizing rollers 30, when the limiting ring 31 is close to the discharge plate 46 and continues to move, the press rod 49 can move towards one end close to the discharge plate 46 and extrude the flitch 46 downwards, so that the discharge plate 46 inclines and compresses the third spring 39, at this point, the silt can be discharged through the inclined discharge plate 46 and fall to the other side of the housing 3 for collection.

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 an artificial wetland sewage treatment plant, includes casing (3), its characterized in that: the top of the shell (3) is communicated with a water inlet pipe (1) for sewage to enter, the inner top of the shell (3) is provided with a pretreatment mechanism for treating garbage in the sewage, and the outer wall of the shell (3) close to the bottom is communicated with a drain pipe (4) for draining water;

the pretreatment mechanism comprises a filter plate (12), the filter plate (12) is fixedly connected to the inner top of the shell (3) through a connecting frame (45), a fixed first fixed plate (21), a movable first movable plate (27), a second movable plate (28) and a third movable plate (47) are arranged on the upper surface of the filter plate (12), the first fixed plate (21), the first movable plate (27), the second movable plate (28) and the third movable plate (47) are distributed in a rectangular array, the adjacent ends of the first fixed plate (21), the first movable plate (27), the second movable plate (28) and the third movable plate (47) are arranged in a staggered mode, the side wall of the filter plate (12) where the third movable plate (47) is located is connected with a first driving mechanism for enabling the third movable plate (47) to move in the direction parallel to the first fixed plate (21), the side wall of the filter plate (12) where the first movable plate (27) is located is connected with a second driving mechanism which is used for enabling the first movable plate (27) to move in the direction parallel to the third movable plate (47), and a cutting mechanism used for cutting garbage is connected among the first fixing plate (21), the first movable plate (27), the second movable plate (28) and the third movable plate (47).

2. The constructed wetland sewage treatment plant of claim 1, characterized in that: the cutting mechanism comprises two first mounting blocks (19), one of the first mounting blocks (19) is fixedly connected to the side wall of a first fixing plate (21), the other one of the first mounting blocks (19) is slidably mounted on the side wall of a first movable plate (27), two four connecting rods (18) are connected between the first mounting blocks (19), blades (20) are arranged on the inner sides of the four connecting rods (18), and through grooves for the four connecting rods (18) to pass through are formed in the side walls of a second movable plate (28) and a third movable plate (47).

3. The constructed wetland sewage treatment plant of claim 1, characterized in that: the side wall of the filter plate (12) where the second movable plate (28) is located is connected with a garbage recycling mechanism, the garbage recycling mechanism comprises a first extension strip (13), the first extension strip (13) is fixedly arranged on the side wall of the filter plate (12), a movable block (14) is arranged in the first extension bar (13) in a sliding way, a second spring (15) is connected between the movable block (14) and the first extension bar (13), the side wall of the movable block (14) far away from the second spring (15) is fixed with the side wall of the second movable plate (28) through a fixed rod, the movable block (14) is fixedly connected with a baffle (16) through a connecting strip (17), the filter plate (12) is provided with a rectangular groove for discharging garbage, the baffle (16) is arranged below the rectangular groove, the lower surface of the filter plate (12) is movably provided with a garbage collecting frame (44) for receiving garbage.

4. The constructed wetland sewage treatment plant of claim 1, characterized in that: the first driving mechanism comprises a second extension strip (23) and a first electric telescopic rod (24) arranged on the second extension strip (23), the second extension strip (23) is fixedly connected to the side wall of the filter plate (12), the output end of the first electric telescopic rod (24) is fixed to a third movable plate (47), the second driving mechanism comprises a third extension strip (25) and a second electric telescopic rod (26) arranged on the third extension strip (25), the third extension strip (25) is fixedly connected to the side wall of the filter plate (12), and the output end of the second electric telescopic rod (26) is fixed to a first movable plate (27).

5. The constructed wetland sewage treatment plant of claim 1, characterized in that: the middle part of casing (3) is connected with the mechanism of disinfecting that is used for disinfecting to sewage, the mechanism of disinfecting includes two sterilization roller (30), two sterilization roller (30) rotate respectively through installation axle (43) and install on the inner wall of casing (3), the water inlet that is used for sewage to get into is offered to sterilization roller (30) outer wall, sterilization roller (30) inside is provided with the ball that disinfects that is used for disinfecting sewage, the lateral wall of casing (3) is connected with and is used for making a round trip the pivoted drive mechanism to two sterilization roller (30).

6. The constructed wetland sewage treatment plant of claim 5, wherein: drive mechanism includes two first gears (7) and rack (10), two first gear (7) is fixed connection respectively in the one end of two stopper (34), casing (3) lateral wall fixedly connected with slide rail (6) at first gear (7) place, slidable mounting has slider (9) on slide rail (6), be connected with first spring (8) between slider (9) and slide rail (6) bottom, fixedly connected with and rack (10) of first gear (7) meshing on slider (9), the top of rack (10) is connected with stay cord (11), the one end that rack (10) were kept away from in stay cord (11) extends to casing (3) inside and through second installation piece (22) and first electric telescopic handle (24) fixed connection.

7. The constructed wetland sewage treatment plant of claim 1, characterized in that: inner wall fixedly connected with that casing (3) are close to the below is used for secondary filter's filter screen (36), casing (3) inner wall connection of filter screen (36) top has the mechanism of scraping that is used for scraping mud to filter screen (36) surface, it includes lead screw (41) to strike off the mechanism, lead screw (41) rotate and install on the lateral wall of casing (3), the outer wall fixed connection of casing (3) is used for casing (3) pivoted motor (5), threaded connection has rod cover (48) on lead screw (41), casing (3) inner wall fixedly connected with spacing (40) of rod cover (48) below, slidable mounting has stopper (34) on spacing (40), stopper (34) are fixed with rod cover (48), stopper (34) below fixedly connected with is used for scraping scraper blade (35) of mud.

8. The constructed wetland sewage treatment plant of claim 1, characterized in that: the filter screen (36) lateral wall inside the shell (3) is rotatably provided with a discharge plate (46) through a pin shaft, the inner wall of the shell (3) below the discharge plate (46) is fixedly connected with a second fixing plate (38), and a third spring (39) is connected between the second fixing plate (38) and the discharge plate (46).

9. The constructed wetland sewage treatment plant of claim 7, wherein: upper portion fixedly connected with mounting bracket (33) of rod cover (48), slidable mounting has two third installation pieces (32), two on mounting bracket (33) fixedly connected with spacing collar (31) between third installation piece (32), spacing collar (31) set up in the interval between two sterilization roller (30), two third installation piece (32) back fixedly connected with is used for depression bar (49) that play flitch (46) pushed down, fixedly connected with baffle (37) between the lower surface of filter screen (36) and casing (3) bottom.

10. The constructed wetland sewage treatment plant of claim 3, wherein: the outer wall of the shell (3) corresponding to the garbage collection frame (44) is provided with a detachable observation plate (2) in a sliding manner.