Solid-liquid separation device for farmland sewage treatment

Abstract

The invention discloses a solid-liquid separation device for farmland sewage treatment, and relates to the technical field of sewage treatment, the solid-liquid separation device comprises a box body and a sealing door arranged outside the box body, and the surface of the sealing door is provided with a controller. The solid-liquid separation device for farmland sewage treatment has an automatic treatment function, sewage is put in by opening a main water inlet pipe, and due to the fact that a blocking plate is closed in an initial state, the sewage can only enter from a first flow dividing water pipe and enters a box body, and the sewage continuously impacts water wheel blades to drive the water wheel blades to rotate; when a threaded sleeve moves leftwards to the maximum position, a time delay switch controls an electric push rod to drive a plugging plate to reset, and after the threaded sleeve moves leftwards to the maximum position, the sewage and the purification liquid are conveyed into a spray head through a second one-way pipe, and the sewage and the purification liquid are stirred and mixed through a stirring rod to improve the sewage purification effect; at the moment, the sewage only can enter the first shunt water pipe, so that the solid-liquid separation device for farmland sewage treatment is driven to operate by utilizing the kinetic energy of water flow, the energy is saved, the environment is protected, and the purified sewage is discharged out of the box body through the drainage pipe.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, and in particular to a solid-liquid separation device for farmland sewage treatment. Background Art

[0002] The current sewage treatment system mainly includes three parts: pretreatment system, biochemical treatment system and muddy water filtration system; the pretreatment system is mainly composed of grid filter tank and regulating tank, which are used to filter out large particles of impurities and keep the sewage water quality uniform; the biochemical treatment system is mainly composed of anaerobic, anoxic and aerobic treatment systems. When the sewage treatment volume is large, it is usually composed of anaerobic tank, anoxic tank and aerobic tank. In the biochemical treatment tank, anaerobic bacteria and aerobic bacteria need to be added to react with nitrogen and sulfur elements in the sewage to remove nutrient-rich substances; the muddy water filtration system is mainly composed of air flotation system, secondary sedimentation tank, etc., which mainly performs physical separation of mud and clean water; The Chinese utility model patent with announcement number CN218089170U discloses a sewage treatment pretreatment pool, including a filter pool and a connecting pipe. A disinfection pool is arranged on the right side of the filter pool, and an inlet pipe is connected to the left side of the filter pool, and an outlet pipe is connected to the right side of the disinfection pool. The filter pool and the disinfection pool are provided with a connecting pipe. When in use, sewage flows from the inlet pipe into the filter pool, and is filtered. After the filtration is completed, it flows into the disinfection pool through the connecting pipe for disinfection, and finally flows out through the outlet pipe. When the sewage treatment pretreatment pool is used, the sewage flows from the inlet pipe into the filter barrel arranged inside the filter pool for debris filtering. The first motor drives multiple groups of scrapers to rotate, and the debris left by the filter screen at the lower end of the filter barrel can be cleaned to the outlet, and the scraper with an "L"-shaped structure can simultaneously clean the bottom and inner wall of the filter barrel when rotating. The above solutions mainly have the following problems: The energy consumption is relatively high. It needs to use a first motor to drive multiple groups of scrapers to rotate, and clean the debris left by the filter at the lower end of the filter barrel to the outlet. The power consumption is relatively high. At the same time, there is no structure for convenient removal of the filter, which is not convenient for regular removal and maintenance of the filter.

[0003] Therefore, we proposed a solid-liquid separation device for farmland sewage treatment in order to solve the above-mentioned problems. Summary of the invention

[0004] The purpose of the present invention is to provide a solid-liquid separation device for farm sewage treatment to solve the problems raised in the above background technology that the solid-liquid separation device for farm sewage treatment on the market currently has high energy consumption, is not provided with a structure for convenient disassembly of the filter, and is inconvenient to disassemble and maintain the filter regularly.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a solid-liquid separation device for farmland sewage treatment, comprising a box body and a sealing door arranged outside the box body, and a controller is arranged on the surface of the sealing door, and the box body is connected to a water inlet and outlet structure, and the water inlet and outlet structure comprises: a main water inlet pipe, which is arranged at the upper end of the box body, and a first branch water pipe and a second branch water pipe are respectively arranged on both sides of the upper end of the box body, and the main water inlet pipe is respectively connected to the first branch water pipe and the second branch water pipe, and a drainage pipe is arranged on one side of the box body close to the bottom; The first bracket is fixedly connected to the inner wall of the box body below the first and second diverter water pipes, and the first bracket is connected to the water wheel blade bearing, the shaft end of the water wheel blade is connected to the first bevel gear, and the inner wall of the box body is provided with a second bracket, the second bracket is connected to the threaded rod bearing, and the second bevel gear at one end of the threaded rod is meshed with the first bevel gear, and the threaded rod is connected to the threaded sleeve, the upper end of the threaded sleeve is provided with an extension rod, and the lower end of the second diverter water pipe is provided with a delay switch for starting the blocking structure; The lower end of the threaded sleeve is connected to a movable frame, and the movable frame is connected to the gear shaft bearing, and a fixed rack matching the gear shaft is arranged inside the box, and the lower end of the gear shaft is connected to a curved plate, and the curved plate is connected to the stirring rod; A filter screen plate is arranged inside the box and directly below the stirring rod; The lower end of the movable frame is connected to the piston cylinder, and the crankshaft is connected to the piston, and one end of the piston cylinder is connected to the liquid storage tank through a first one-way tube, and the other end of the piston cylinder is connected to the nozzle through a second one-way tube.

[0006] As a preferred technical solution of the present invention, a universal wheel is arranged at the bottom of the box, and the universal wheel is detachably connected to the box, and an anti-slip pattern is arranged on the outside of the universal wheel.

[0007] As a preferred technical solution of the present invention, the blocking structure includes: the upper end of the second diversion water pipe is connected to an electric push rod, and one end of the electric push rod is connected to a blocking plate, and a through groove for the blocking plate to enter and exit is opened at the upper end of the second diversion water pipe.

[0008] As a preferred technical solution of the present invention, a guide rod is fixedly arranged inside the box, and a guide groove is opened on the surface of the movable frame, and the guide groove is slidably matched with the guide rod.

[0009] As a preferred technical solution of the present invention, an inclined support plate is fixedly provided inside the box, and the inclined support plate is connected to the filter screen plate through a snap-fit ​​structure.

[0010] As a preferred technical solution of the present invention, the engaging structure includes: the lower end of the filter screen plate is connected to a block, and the upper end of the inclined support plate is provided with a slot, and the slot and the block are engaged with each other.

[0011] As a preferred technical solution of the present invention, an inner groove is opened inside the inclined support plate, and a stopper is slidably connected in the inner groove, and the stopper is engaged with a spring, the outer end of the stopper is connected to the pull rod, and the stopper is engaged with a recessed groove on the surface of the block.

[0012] As a preferred technical solution of the present invention, a liquid storage tank is detachably provided on the side of the box body, a box cover is provided on the upper end of the liquid storage tank, and a liquid level observation window is provided on the surface of the liquid storage tank.

[0013] As a preferred technical solution of the present invention, the inner bottom end of the box body has an angle with the horizontal plane, so that the sewage can be diverted into the drain pipe, and a detachable filter element is provided in the drain pipe.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The solid-liquid separation device for farmland sewage treatment is provided with an automatic processing function. The main water inlet pipe is opened to put in sewage. Since the plugging plate is closed in the initial state, the sewage can only enter from the first diversion pipe. The sewage enters the box body, and the sewage continuously impacts the water wheel blade to drive it to rotate, thereby driving the piston to be squeezed and sent to the nozzle through the second one-way pipe. The nozzle sprays the purified liquid into the sewage. At the same time, the stirring rod stirs and mixes the sewage and the purified liquid to improve the sewage purification effect. When the threaded sleeve moves to the maximum position to the left, the delay switch controls the electric push rod to drive the plugging plate to reset. At this time, the sewage can only enter the first diversion pipe, thereby realizing the use of the kinetic energy of the water flow itself to drive the operation of the solid-liquid separation device for farmland sewage treatment, which is energy-saving and environmentally friendly. After passing through the filter screen plate, the solid-liquid separation is completed, and the purified sewage is discharged from the box body through the drain pipe; 2. The solid-liquid separation device for farmland sewage treatment is convenient for disassembly and maintenance. When the interior of the box needs to be maintained, the sealing door can be opened to clean and maintain the inner wall of the box. When the filter screen plate needs to be removed, the hand-pull rod drives the block to disengage the card block, so that the card block at the lower end of the filter screen plate can be pulled out of the card slot on the upper end of the inclined support plate, thereby facilitating the cleaning and maintenance of the filter screen plate, which is very convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the main structure of the present invention; Figure 2 It is a schematic diagram of the main cross-sectional structure of the present invention; Figure 3 For the present invention Figure 2 The enlarged structural diagram at A in the middle; Figure 4For the present invention Figure 2 The enlarged structural diagram at B in the middle; Figure 5 It is a schematic diagram of the side view structure of the water wheel blade of the present invention; Figure 6 It is a schematic diagram of a half-section structure of the piston cylinder of the present invention; Figure 7 It is a schematic diagram of the connection structure of the inclined support plate and the filter screen plate of the present invention.

[0016] In the figure: 1, box; 2, universal wheel; 3, sealing door; 4, controller; 5, main water inlet pipe; 6, first branch water pipe; 7, second branch water pipe; 8, electric push rod; 9, blocking plate; 10, through slot; 11, delay switch; 12, first bracket; 13, water wheel blade; 14, first bevel gear; 15, second bracket; 16, threaded rod; 17, second bevel gear; 18, threaded sleeve; 19, extension rod; 20, movable frame; 21 , guide rod; 22, gear shaft; 23, fixed rack; 24, crank plate; 25, stirring rod; 26, piston cylinder; 27, crankshaft; 28, piston; 29, first one-way pipe; 30, liquid storage tank; 31, tank cover; 32, second one-way pipe; 33, nozzle; 34, inclined support plate; 35, filter screen plate; 36, block; 37, slot; 38, inner slot; 39, stopper; 40, spring; 41, pull rod; 42, drain pipe. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0018] See also Figure 1-7The present invention provides a technical solution: a solid-liquid separation device for farmland sewage treatment, comprising a box body 1 and a sealing door 3 arranged outside the box body, and a controller 4 is arranged on the surface of the sealing door 3, and the box body 1 is connected to a water inlet and outlet structure, and the water inlet and outlet structure comprises: a main water inlet pipe 5, which is arranged at the upper end of the box body 1, and a first branch water pipe 6 and a second branch water pipe 7 are respectively arranged on both sides of the upper end of the box body 1, and the main water inlet pipe 5 is respectively connected to the first branch water pipe 6 and the second branch water pipe 7, and a side of the box body 1 near the bottom is arranged There is a drain pipe 42, and the inner bottom end of the box body 1 is at an angle with the horizontal plane, so that the sewage can be diverted into the drain pipe 42, and a detachable filter element is provided in the drain pipe 42; a universal wheel 2 is provided at the bottom of the box body 1, and the universal wheel 2 is detachably connected to the box body 1, and the outer surface of the universal wheel 2 is provided with anti-slip grooves, and the first bracket 12 is fixedly connected to the inner wall of the box body 1 below the first diversion water pipe 6 and the second diversion water pipe 7, and the first bracket 12 is connected to the water wheel blade 13 bearing, and the shaft end of the water wheel blade 13 is connected to the inner wall of the box body 1. The first bevel gear 14 is connected, and the inner wall of the box body 1 is provided with a second bracket 15, the second bracket 15 is connected with the threaded rod 16 bearing, and the second bevel gear 17 at one end of the threaded rod 16 is meshed with the first bevel gear 14, and the threaded rod 16 is connected with the threaded sleeve 18, the upper end of the threaded sleeve 18 is provided with an extension rod 19, and the lower end of the second diversion water pipe 7 is provided with a delay switch 11 for starting the blocking structure; the blocking structure includes: the upper end of the second diversion water pipe 7 is connected to the electric push rod 8, and one end of the electric push rod 8 is connected to the blocking plate 9 is connected, and the upper end of the second branch water pipe 7 is provided with a through groove 10 for the plugging plate 9 to enter and exit, the lower end of the threaded sleeve 18 is connected to the movable frame 20, and the movable frame 20 is connected to the gear shaft 22 bearing, and the interior of the box body 1 is provided with a fixed rack 23 matched with the gear shaft 22, and the lower end of the gear shaft 22 is connected to a curved plate 24, and the curved plate 24 is connected to the stirring rod 25; a guide rod 21 is fixedly provided inside the box body 1, and a guide groove is provided on the surface of the movable frame 20, and the guide groove is slidably matched with the guide rod 21; Open the main water inlet pipe 5 and put in sewage. Since the blocking plate 9 is closed in the initial state, sewage can only enter from the first branch water pipe 6. The sewage enters the box body 1, and the sewage continuously impacts the water wheel blade 13 to drive it to rotate. The rotation of the water wheel blade 13 drives the first bevel gear 14 to rotate, and the first bevel gear 14 drives the second bevel gear 17 to rotate, thereby driving the threaded rod 16 to rotate, and then drives the movable frame 20 to slide along the guide rod 21. The gear shaft 22 is engaged with the fixed rack 23, thereby driving the crankshaft 24 to rotate. The crankshaft 27 drives the piston 28 to reciprocate in the piston cylinder 26, and the purified liquid inside the liquid storage tank 30 is drawn into the piston cylinder 26 through the first one-way tube 29, and is sent to the nozzle 33 through the second one-way tube 32 under the squeezing action of the piston 28. The nozzle 33 sprays into the sewage. At the same time, the rotation of the crankshaft 24 will drive the stirring rod 25 to stir and mix the sewage and the purified liquid, thereby improving the sewage purification effect. Some solid matter in the filter screen 35 will clog the filter screen plate 35. The stirring rod 25 can also dredge the filter screen plate 35 while stirring. When the movable frame 20 moves to the maximum position on the right side, the extension rod 19 touches the delay switch 11. The delay switch 11 starts the electric push rod 8, and the electric push rod 8 drives the blocking plate 9 to rise, so that the second branch water pipe 7 can be opened. Since a throttle valve is provided in the first branch water pipe 6, the sewage will enter the box body 1 through the second branch water pipe 7 without resistance. The sewage impacts the water wheel blade 13 at the lower end of the second branch water pipe 7, thereby driving the threaded rod 16 to reverse, so that the threaded sleeve 18 moves to the left. When the threaded sleeve 18 moves to the maximum position on the left, the delay switch 11 controls the electric push rod 8 to drive the blocking plate 9 to reset. At this time, the sewage can only enter the first branch water pipe 6, thereby realizing the use of the kinetic energy of the water flow itself to drive the operation of the solid-liquid separation device for farmland sewage treatment, which is energy-saving and environmentally friendly. The purified sewage is discharged from the box body 1 through the drain pipe 42; A filter screen plate 35 is arranged inside the box body 1 and directly below the stirring rod 25; an inclined support plate 34 is fixedly arranged inside the box body 1, and the inclined support plate 34 and the filter screen plate 35 are connected by a snap-fit ​​structure, and the snap-fit ​​structure includes: a card block 36 is connected to the lower end of the filter screen plate 35, and a card slot 37 is provided at the upper end of the inclined support plate 34, and the card slot 37 and the card block 36 are snap-fitted with each other, an inner groove 38 is provided inside the inclined support plate 34, and a stopper 39 is slidably connected in the inner groove 38, and the stopper 39 is connected to the spring The spring 40 is engaged, and the outer end of the stopper 39 is connected to the pull rod 41, and the stopper 39 is engaged with the concave groove on the surface of the block 36. When the interior of the box body 1 needs to be maintained, the sealing door 3 is opened to clean and maintain the inner wall of the box body 1. When the filter screen plate 35 needs to be removed, the pull rod 41 is pulled by hand to drive the stopper 39 and the block 36 to disengage, so that the block 36 at the lower end of the filter screen plate 35 can be pulled out from the groove 37 at the upper end of the inclined support plate 34, thereby facilitating the cleaning and maintenance of the filter screen plate 35, which is very convenient. The lower end of the movable frame 20 is connected to the piston cylinder 26, and the crank plate 24 is connected to the piston 28 through the crankshaft 27, and one end of the piston cylinder 26 is connected to the liquid storage tank 30 through the first one-way tube 29, and the other end of the piston cylinder 26 is connected to the nozzle 33 through the second one-way tube 32; the liquid storage tank 30 is detachably provided on the side of the box body 1, and the upper end of the liquid storage tank 30 is provided with a box cover 31, and the surface of the liquid storage tank 30 is provided with a liquid level observation window.

[0019] Working principle: when using the solid-liquid separation device for farmland sewage treatment, first open the main water inlet pipe 5 to put in sewage. Since the blocking plate 9 is closed in the initial state, sewage can only enter from the first diversion pipe 6. The sewage enters the box body 1, and the sewage continuously impacts the water wheel blade 13 to drive it to rotate. The rotation of the water wheel blade 13 drives the first bevel gear 14 to rotate, and the first bevel gear 14 drives the second bevel gear 17 to rotate, thereby driving the threaded rod 16 to rotate, and then drives the movable frame 20 to slide along the guide rod 21. The gear shaft 22 is engaged with the fixed rack 23, thereby driving the crankshaft 24 to rotate. The crankshaft 27 drives the piston 28 to reciprocate in the piston cylinder 26, and the purified liquid inside the liquid storage tank 30 is drawn into the piston cylinder 26 through the first one-way tube 29, and is sent to the nozzle 33 through the second one-way tube 32 under the extrusion of the piston 28. The nozzle 33 sprays into the sewage. At the same time, the rotation of the crankshaft 24 will drive the stirring rod 25 to stir and mix the sewage and the purified liquid, thereby improving the sewage purification effect. Some solid matter in the filter screen 35 will clog the filter screen plate 35. The stirring rod 25 can also dredge the filter screen plate 35 while stirring. At the same time, the filter screen plate 35 is used to separate the liquid and the solid. When the movable frame 20 moves to the maximum position on the right side, the extension rod 19 touches the delay switch 11. The delay switch 11 starts the electric push rod 8, and the electric push rod 8 drives the blocking plate 9 to rise, so that the second branch water pipe 7 can be opened. Since a throttle valve is provided in the first branch water pipe 6, the sewage will enter the box body 1 through the second branch water pipe 7 without resistance. The sewage impacts the water wheel blade 13 at the lower end of the second branch water pipe 7, thereby driving the threaded rod 16 to reverse, so that the threaded sleeve 18 moves to the left. When the threaded sleeve 18 moves to the maximum position on the left, the delay switch 11 controls the electric push rod 8 to drive the blocking plate 9 to reset. At this time, the sewage can only enter the first branch water pipe 6, thereby realizing the use of the kinetic energy of the water flow itself to drive the operation of the solid-liquid separation device for farmland sewage treatment, which is energy-saving and environmentally friendly. The purified sewage is discharged from the box body 1 through the drain pipe 42; When it is necessary to maintain the interior of the box body 1, the sealing door 3 is opened to clean and maintain the inner wall of the box body 1. When it is necessary to remove the filter screen plate 35, the hand-pull rod 41 drives the block 39 to disengage the block 36, so that the block 36 at the lower end of the filter screen plate 35 can be pulled out from the slot 37 at the upper end of the inclined support plate 34, thereby facilitating the cleaning and maintenance of the filter screen plate 35, which is very convenient.

[0020] Thereby completing a series of tasks, the contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0021] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A solid-liquid separation device for treating farmland sewage, comprising a housing (1) and a sealing door (3) arranged outside the housing, wherein a controller (4) is arranged on the surface of the sealing door (3), and the housing (1) is connected to a water inlet and outlet structure, characterized in that: The water inlet and outlet structure comprises: a main water inlet pipe (5) which is arranged at the upper end of the box body (1), and a first diversion water pipe (6) and a second diversion water pipe (7) are respectively arranged on both sides of the upper end of the box body (1), and the main water inlet pipe (5) is respectively connected to the first diversion water pipe (6) and the second diversion water pipe (7), and a drainage pipe (42) is arranged on one side of the box body (1) close to the bottom; A first bracket (12) is fixedly connected to the inner wall of the housing (1) below the first diverter water pipe (6) and the second diverter water pipe (7), and the first bracket (12) is connected to a bearing of a water wheel blade (13), and the shaft end of the water wheel blade (13) is connected to a first bevel gear (14), and a second bracket (15) is provided on the inner wall of the housing (1), and the second bracket (15) is connected to a bearing of a threaded rod (16), and a second bevel gear (17) at one end of the threaded rod (16) is meshed with the first bevel gear (14), and the threaded rod (16) is connected to a threaded sleeve (18), and an extension rod (19) is provided at the upper end of the threaded sleeve (18), and a delay switch (11) for starting a blocking structure is provided at the lower end of the second diverter water pipe (7); The lower end of the threaded sleeve (18) is connected to a movable frame (20), and the movable frame (20) is connected to a bearing of a gear shaft (22), and a fixed rack (23) matching the gear shaft (22) is arranged inside the housing (1), and the lower end of the gear shaft (22) is connected to a curved plate (24), and the curved plate (24) is connected to a stirring rod (25); A filter screen plate (35) is arranged inside the box (1) and directly below the stirring rod (25); The lower end of the movable frame (20) is connected to the piston cylinder (26), and the crank plate (24) is connected to the piston (28) via a crankshaft (27). One end of the piston cylinder (26) is connected to the liquid storage tank (30) via a first one-way tube (29), and the other end of the piston cylinder (26) is connected to the nozzle (33) via a second one-way tube (32).

2. The solid-liquid separation device for farmland sewage treatment according to claim 1, characterized in that: A universal wheel (2) is provided at the bottom of the box (1), and the universal wheel (2) is detachably connected to the box (1), and anti-slip grooves are provided on the outside of the universal wheel (2).

3. The solid-liquid separation device for farmland sewage treatment according to claim 1, characterized in that: The blocking structure comprises: the upper end of the second diverter water pipe (7) is connected to an electric push rod (8), one end of the electric push rod (8) is connected to a blocking plate (9), and a through groove (10) for the blocking plate (9) to enter and exit is provided at the upper end of the second diverter water pipe (7).

4. The solid-liquid separation device for farmland sewage treatment according to claim 1, characterized in that: A guide rod (21) is fixedly arranged inside the box body (1), and a guide groove is provided on the surface of the movable frame (20), and the guide groove and the guide rod (21) are slidably matched.

5. The solid-liquid separation device for farmland sewage treatment according to claim 1, characterized in that: An inclined support plate (34) is fixedly arranged inside the box body (1), and the inclined support plate (34) is connected to the filter screen plate (35) via a snap-fit ​​structure.

6. The solid-liquid separation device for farmland sewage treatment according to claim 5, characterized in that: The engaging structure comprises: the lower end of the filter screen plate (35) is connected to a engaging block (36), and the upper end of the inclined support plate (34) is provided with an engaging groove (37), and the engaging groove (37) and the engaging block (36) are mutually engaged.

7. The solid-liquid separation device for farmland sewage treatment according to claim 6, characterized in that: An inner groove (38) is provided inside the inclined support plate (34), and a stopper (39) is slidably connected in the inner groove (38), and the stopper (39) is engaged with a spring (40). The outer end of the stopper (39) is connected to a pull rod (41), and the stopper (39) is engaged with a recessed groove on the surface of the clamping block (36).

8. The solid-liquid separation device for farmland sewage treatment according to claim 1, characterized in that: A liquid storage box (30) is detachably provided on the side of the box body (1), a box cover (31) is provided at the upper end of the liquid storage box (30), and a liquid level observation window is provided on the surface of the liquid storage box (30).

9. The solid-liquid separation device for farmland sewage treatment according to claim 1, characterized in that: The inner bottom end of the box body (1) forms an angle with the horizontal plane, so that sewage can be diverted into the drainage pipe (42), and a detachable filter element is provided in the drainage pipe (42).

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