CN215516870U - Sewage pretreatment device - Google Patents

Abstract

The sewage pretreatment device of the present invention comprises: the grid box body is communicated with the sewage inlet pipeline, and a gate is arranged on the sewage inlet pipeline; the grid lifting turnover mechanism is inserted into the grid box body; the grid component is arranged on the grid lifting turnover mechanism; the grid cleaning mechanism is arranged above the grid box body; the vertical pipe part of the flow guide pipe is connected and communicated with the bottom of the grid box body; the supporting pipe fitting is connected with the horizontal pipe part, a sand setting filtering structure is arranged at the joint of the supporting pipe fitting and the horizontal pipe part, and the sand setting filtering structure is obliquely arranged relative to the horizontal plane; the blocking structure is arranged at the joint of the supporting pipe fitting and the horizontal pipe part, the blocking structure is arranged on the horizontal pipe part, and the blocking structure is provided with a sand discharge cleaning structure; the weight monitor is mounted on the grid member. The sewage pretreatment device can remove suspended matters, floating objects and silt to the maximum extent, is convenient to clean and occupies a small area.

Description

Sewage pretreatment device

Technical Field

The utility model relates to the technical field of sewage treatment, in particular to a sewage pretreatment device.

Background

The living style, diet, health habit and the like of rural residents are different from those of cities, so that rural sewage has the characteristics of small and dispersed water amount and large water quality and water amount fluctuation. Due to the lack of garbage collection and transportation facilities, the operation and maintenance are relatively inadequate, and the rural sewage is usually provided with a large amount of floating objects and suspended matters such as plastic bags, cigarette cases and the like which are difficult to be biologically treated. Meanwhile, because rural roads and pipe networks are not maintained timely, a large amount of silt is deposited in a sewage pipeline, and the content of inorganic matters in sewage entering a sewage treatment station is high. Simultaneously because the operation scale of sewage treatment station is less, the sewage treatment station all adopts automatic control operation at present stage, be difficult to carry out timely clearance to the sewage treatment station, lead to solid accumulation such as a large amount of difficult degradation floater and inorganic gravel in the biochemical system of sewage treatment station, this not only can cause activated sludge's organic matter to compare and reduce, reduce biochemical efficiency and aeration efficiency, improve the operation energy consumption of sewage treatment station, still can form hardening because of its long-term accumulation in sewage treatment station living area, cause the equipment trouble of sewage treatment station. Meanwhile, because the construction land in rural areas is gradually tense at the present stage, how to reduce the occupied area of the pretreatment section as much as possible is also an urgent problem to be solved.

Therefore, a sewage pretreatment device which is suitable for the current situation of rural sewage treatment, can remove suspended matters, floaters and silt to the maximum extent, has high automation degree, is convenient to clean and occupies small area is urgently needed.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned shortcomings of the prior art, the present invention provides a sewage pretreatment device capable of removing suspended matters, floating matters and silt to the maximum extent, and having high automation degree, convenient cleaning and small floor space.

To achieve the above and other related objects, the present invention provides a sewage pretreatment device, including:

the grid box body is communicated with the output end of the sewage inlet pipeline, and the output end of the sewage inlet pipeline is provided with a gate;

the grid lifting and overturning mechanism is inserted into the grid box body;

the grid component is arranged on the grid lifting and overturning mechanism;

the grid cleaning mechanism is arranged above the grid box body;

the guide pipe comprises a vertical pipe part and a horizontal pipe part connected with the lower end of the vertical pipe part, and the upper end of the vertical pipe part is connected and communicated with the bottom of the grating box body;

the sand setting assembly comprises a supporting pipe fitting and a sand setting filtering structure, the upper end of the supporting pipe fitting is connected with the horizontal pipe part, the sand setting filtering structure is arranged at the joint of the supporting pipe fitting and the horizontal pipe part, and the sand setting filtering structure is obliquely arranged relative to the horizontal plane;

the sand discharge assembly comprises an extension pipe fitting, a valve, a sand discharge cleaning structure and a liftable blocking structure, the blocking structure is arranged at the joint of the support pipe fitting and the horizontal pipe part, the blocking structure is arranged on the horizontal pipe part, and the sand discharge cleaning structure is arranged on the blocking structure; when the blocking structure descends into the horizontal pipe part, the blocking structure blocks water flow from entering the supporting pipe fitting, the extending pipe fitting is connected with the lower end of the supporting pipe fitting, and a valve is arranged on the extending pipe fitting;

a weight monitor mounted on the grid member;

the liquid level monitor is used for monitoring a liquid level value inside the grating box body, a liquid level value inside the grating component and a liquid level value of the sewage inlet pipeline;

the gate, the grid promotes tilting mechanism the grid wiper mechanism the valve the sediment outflow washs the structure the weight monitor the liquid level monitor with block the structure and all with the controller is connected.

Preferably, the grill member comprises a grill groove and a plurality of grill nets disposed inside the grill groove.

Preferably, the grid lifting and overturning mechanism includes: grid guide rail and driver part, the grid guide rail include vertical guide rail portion and with the arc guide rail portion that the top of vertical guide rail portion is connected, the grid part with grid guide rail swing joint, driver part with the grid part is connected, the driver part drive the grid part, along the grid guide rail removes, driver part with the controller is connected.

Preferably, the grill cleaning mechanism includes: the pulley, around being equipped with direction chain on the pulley, direction chain connection support frame, install a plurality of shower nozzles on the support frame.

Further, the support frame includes with the body frame body that the direction chain is connected, be equipped with a plurality of flexible support bodies on the body frame body, every all be equipped with on the body frame body the shower nozzle.

Preferably, the sand discharge cleaning structure comprises: the exhaust pipe and the flushing water pipe are arranged on the blocking structure.

Preferably, the lower end of the extension pipe fitting is provided with a sand collecting groove.

The utility model also relates to a sewage treatment method, which comprises the steps that by adopting the sewage pretreatment device, sewage enters the sewage pretreatment device through the sewage inlet pipeline for pretreatment, and substances with the particle size larger than the mesh diameter of the grid part in the sewage are intercepted inside the grid part to form grid slag; substances with the particle size smaller than the mesh diameter of the grating component in the sewage pass through the grating component and enter the grating box body;

sewage in the grating box body passes through the flow guide pipe, the sand setting filtering structure enables particles in the sewage passing through the horizontal pipe part to be adhered to the sand setting filtering structure, particles with the particle size larger than the pore size of the mesh of the sand setting filtering structure in the sewage are intercepted on the sand setting filtering structure, and the sewage is discharged after passing through the horizontal pipe part;

the liquid level monitor sends the monitored liquid level value inside the grating box body, the monitored liquid level value inside the grating part and the monitored liquid level value of the sewage inlet pipeline to a controller;

a weight monitor monitors the weight of the grid member;

the controller calculates to obtain an actual first liquid level value, wherein the first liquid level value is a difference value between a liquid level value of sewage entering a pipeline and a liquid level value inside the grid component, and when the controller judges that the actual first liquid level value is smaller than a preset first liquid level value, the controller controls the grid lifting and overturning mechanism to carry out slag removal operation on the grid component;

when the controller judges that the actual weight of the grid component is larger than the preset weight of the grid component, the controller controls the grid lifting and overturning mechanism to carry out slag removal operation on the grid component;

the slag removal operation comprises the following steps:

step 1) closing a gate;

step 2) the controller controls the grid lifting and overturning mechanism to lift and overturn the grid component, and then grid slag in the grid component is poured out;

step 3) the controller controls a grating cleaning mechanism to flush the grating part;

step 4), the controller controls the grid lifting and overturning mechanism to drive the grid component to reset into the grid box body;

step 5) opening the gate;

when the controller judges that the liquid level value in the grating box body monitored by the liquid level monitor is larger than the preset liquid level value in the grating box body, the controller controls the sand discharge assembly to start sand discharge operation;

the controller calculates to obtain an actual second liquid level value, the second liquid level value is a difference value between the liquid level value of the grating box body and the liquid level value inside the grating component, and when the controller judges that the actual second liquid level value is smaller than a preset second liquid level value, the controller controls the sand discharge assembly to start sand discharge operation;

the sand discharge operation comprises the following steps:

step 1) the controller controls the barrier structure to descend, and the controller controls the valve to open;

and step 2) the controller controls the sand discharge cleaning structure to wash the sand setting filtering structure.

Preferably, the grating member comprises grating grooves and grating nets arranged inside the grating grooves;

when the controller judges that the number of times of slag removal operation of the grid component reaches the preset maximum number of times of slag removal operation of the grid component, the controller starts a grid net replacement prompt to perform the grid net replacement operation;

when the controller judges that the liquid level value inside the grating component in the grating box body after being washed reaches a preset liquid level value corresponding to the replacement of a grating net, the controller starts a grating net replacement prompt to perform grating net replacement operation;

when the controller judges that the cleaning time interval of the two adjacent grid parts is smaller than the preset cleaning time interval of the grid parts, the controller starts a grid net replacement prompt to perform grid net replacement operation;

the grid net replacement operation comprises the following steps:

step 1) closing a gate;

step 2) after the controller controls the grid lifting and overturning mechanism to lift the grid component, replacing the grid net in the grid component;

step 3) the controller controls the grating lifting and overturning mechanism to drive the grating component to reset into the grating box body;

and 4) opening the gate.

As described above, the sewage pretreatment apparatus of the present invention has the following advantageous effects:

the sewage pretreatment device can realize slag removal and sand setting of rural sewage, can solve the problem of the deficiency of the existing rural sewage pretreatment equipment by using the sewage pretreatment device, separates inorganic matters in the rural sewage in the pretreatment stage, reduces the treatment load of a subsequent biochemical section, and reduces the management pressure of sewage treatment; the sewage pretreatment device can remove suspended matters, floating objects and silt to the maximum extent, and has the advantages of high automation degree, convenience in cleaning and small occupied area.

Drawings

Fig. 1 is a front view schematically illustrating a structure of a grid member of the sewage pretreatment apparatus of the present embodiment in a grid box.

Fig. 2 shows an enlarged structural diagram at a of fig. 1.

Fig. 3 is a front view schematically illustrating the structure of the grid member of the sewage pretreatment apparatus of the present embodiment after the grid member leaves the grid box and the grid member is turned over.

Fig. 4 is a schematic top view of the grid mesh of the present embodiment disposed in the grid grooves.

Fig. 5 is a side view schematically illustrating the structure of the grid member of the sewage pretreatment device of the present embodiment in the grid box.

Fig. 6 is an enlarged schematic view of the structure at B of fig. 5.

Fig. 7 is a schematic structural view illustrating the initial state of the grill cleaning mechanism of the sewage pretreatment apparatus according to the present embodiment.

Fig. 8 is a schematic structural view illustrating the lowered grille washing mechanism of the sewage pretreatment apparatus according to the present embodiment.

Fig. 9 is a schematic structural view illustrating the extended telescopic bracket of the grille cleaning mechanism of the sewage pretreatment apparatus according to the present embodiment.

Fig. 10 is a schematic diagram of the sewage pretreatment apparatus of the present embodiment under the control of the controller.

Description of the reference numerals

100 grid box

110 flow guide pipe

111 vertical tube part

112 horizontal pipe part

200 sewage inlet pipeline

210 output terminal

300 grid member

310 grid groove

320 grid net

410 grid lifting and overturning mechanism

411 grid guide rail

4111 vertical guide rail part

4112 an arc-shaped guide rail

412 drive component

420 grid cleaning mechanism

421 pulley

422 guide chain

423 support frame

4231 Main frame

4232 Telescopic frame

424 spray head

510 support tube

520 grit filtration

530 Filter

610 extension pipe

620 valve

630 arrange sand and wash structure

631 exhaust pipe

632 flushing water pipe

640 Barrier Structure

650 sand collecting groove

651 residue lifting hole

652 air intake hole

653 slag-stopping filter plate

710 weight monitor

720 liquid level monitor

721 grille box body internal liquid level monitor

722 internal liquid level monitor for grid member

723 sewage inlet pipeline liquid level monitor

800 controller

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

Please refer to the attached drawings. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.

As shown in fig. 1 to 10, the sewage pretreatment apparatus of the present embodiment includes:

the device comprises a grating box body 100, wherein the grating box body 100 is an open box body and is positioned underground, the grating box body 100 is communicated with an output end 210 of a sewage inlet pipeline 200, and a gate is arranged on the output end 210 of the sewage inlet pipeline 200;

a grill lifting and turning mechanism 410 inserted into the grill casing 100; the grid component 300 is used for separating inorganic matters and sewage which are primarily screened in the pretreatment process;

a grill member 300 installed on the grill elevating and turning mechanism 410;

a grill cleaning mechanism 420 provided above the grill casing 100;

the draft tube 110 comprises a vertical tube part 111 and a horizontal tube part 112 connected with the lower end of the vertical tube part 111, and the upper end of the vertical tube part 111 is connected and communicated with the bottom of the grid box 100;

the sand setting assembly comprises a supporting pipe 510 and a sand setting filtering structure 520, the upper end of the supporting pipe 510 is connected with the horizontal pipe part 112, the sand setting filtering structure 520 is arranged at the joint of the supporting pipe 510 and the horizontal pipe part 112, and the sand setting filtering structure 520 is obliquely arranged relative to the horizontal plane;

the sand discharge assembly comprises an extension pipe fitting 610, a valve 620, a sand discharge cleaning structure 630 and a liftable blocking structure 640, wherein the blocking structure 640 is arranged at the joint of the support pipe fitting 510 and the horizontal pipe part 112, the blocking structure 640 is arranged on the horizontal pipe part 112, and the sand discharge cleaning structure 630 is arranged on the blocking structure 640; when the blocking structure 640 descends into the horizontal pipe part 112, the blocking structure 640 blocks water from entering the supporting pipe 510, the extending pipe 610 is connected with the lower end of the supporting pipe 510, and the valve 620 is arranged on the extending pipe 610;

a weight monitor 710 mounted on the grill member 300;

a liquid level monitor 720 for monitoring a level value inside the grating box 100, a level value inside the grating member 300, and a level value of the sewage entering the pipeline 200; a liquid level monitor 720 comprising a grill tank interior liquid level monitor 721, a grill member interior liquid level monitor 722, and a sewage intake pipe liquid level monitor 723; a grill tank interior level monitor 721 for monitoring the level value inside the grill tank 100, a grill member interior level monitor 722 for monitoring the level value inside the grill member 300, and a sewage inlet pipe level monitor 723 for monitoring the level value of sewage into the pipe 200

The controller 800, the gate, the grid lifting and turning mechanism 410, the grid cleaning mechanism 420, the valve 620, the sand discharging and cleaning structure 630, the weight monitor 710, the liquid level monitor 720 and the blocking structure 640 are all connected with the controller 800.

In the sewage pretreatment device, after entering the sewage pretreatment device through the gate, sewage is filtered by the grid mesh 320 of the grid part 300, large-particle solids are retained in the grid mesh 320, the sewage flows out of the sieve pores of the grid mesh 320 into the grid box body 100 to form a certain liquid level height, and then the sewage passes through the sand setting component through the draft tube 110 at the bottom of the grid box body 100 to finish sand-water separation and then flows out; when the controller 800 judges that the actual first liquid level value is smaller than the preset first liquid level value or the actual weight of the grid component 300 is larger than the preset weight of the grid component 300, the controller 800 closes the gate, and after the controller 800 controls the grid lifting and overturning mechanism 410 to lift and overturn the grid component 300, the grid slag in the grid component 300 is dumped to the slag-water separation zone in a gravity dumping manner; the controller 800 controls the grid cleaning mechanism 420 to wash the grid part 300, and the controller 800 controls the grid lifting and overturning mechanism 410 to drive the grid part 300 to reset into the grid box 100 and open the gate; when the controller 800 judges that the level value inside the grid box 100 monitored by the level monitor 720 is greater than the preset level value inside the grid box 100 or the controller 800 judges that the actual second level value is less than the preset second level value, the controller 800 controls the sand discharge assembly to start the sand discharge operation, and the sand discharge operation is as follows: the controller 800 controls the blocking structure 640 to descend, the controller 800 controls the valve 620 to open, and then the controller 800 controls the sand discharge cleaning structure 630 to flush the settled sand filtering structure 520.

The sewage pretreatment device can realize slag removal and sand setting of rural sewage, can solve the problem of the deficiency of the existing rural sewage pretreatment equipment by using the sewage pretreatment device, separates inorganic matters in the rural sewage in the pretreatment stage, reduces the treatment load of a subsequent biochemical section, and reduces the management pressure of sewage treatment.

The sewage pretreatment device can remove suspended matters, floating objects and silt to the maximum extent, and has the advantages of high automation degree, convenience in cleaning and small occupied area.

The grill member 300 includes a grill slot 310 and a plurality of replaceable grill nets 320 disposed inside the grill slot 310. The grill slots 310 serve as supports, and the replaceable grill net 320 can be easily removed from the grill slots 310. In this embodiment, a grill net 320 is inserted in the grill slots 310.

The grid lifting and overturning mechanism 410 includes: the grille guide rail 411 and the drive member 412, the grille guide rail 411 includes vertical rail portion 4111 and an arc rail portion 4112 connected with the top of the vertical rail portion 4111, the grille member 300 is movably connected with the grille guide rail 411, the drive member 412 is connected with the grille member 300, and the drive member 412 drives the grille member 300, so that the grille member 300 moves along the grille guide rail 411, and the drive member 412 is connected with the controller 800. The driving part 412 in the grating lifting and overturning mechanism 410 drives the grating groove 310, so that the grating groove 310 moves along the grating guide rail 411, and the grating part 300 is driven by the driving part 412 to overturn grating slag to the slag-water separation area in a gravity dumping manner. The arc-shaped rail portion 4112 of the present embodiment is an upwardly convex structure.

The grill cleaning mechanism 420 includes: the pulley 421, the pulley 421 is wound with a guide chain 422, the guide chain 422 is connected with a support frame 423, and the support frame 423 is provided with a plurality of spray heads 424. This configuration allows all of the spray heads 424 to be moved to the side of the grill member 300, facilitating the spray heads 424 to flush the grill member 300. In this embodiment, the grill cleaning mechanism 420 is configured to flush the grill member 300 in a back flush manner.

In this embodiment, two guide chains 422 and two pulleys 421 form a double-guide-chain pulley 421 system, the double-guide-chain pulley 421 system can transport the high-pressure nozzles 424 to a designated position under an operating condition, and keep a suitable distance between the nozzles 424, the high-pressure water mist nozzles 424 are water mist nozzles 424 with H ═ 60m, so that the cleaning water is uniformly sprayed on the grid mesh 320, and the cleaning is completed through the high-pressure characteristic; the magnetic coupling device keeps the position of the grid cleaning system in a stop running state fixed through the attraction of the magnet; the water pump and the pipeline system are used for providing a source of cleaning water, the cleaning water is preferably tail water treated by a sewage treatment station, a PPR pipe or a steel pipe is adopted in the device, and a plastic hose is lined in the device.

The support frame 423 comprises a main frame body 4231 connected with the guide chain 422, a plurality of telescopic frame bodies 4232 are arranged on the main frame body 4231, and the spray head 424 is arranged on each main frame body 4231. The telescopic frame 4232 is driven to move in a telescopic manner, so that the distance between the nozzles 424 can be adjusted, and the efficiency of flushing the grille member 300 can be improved. The cleaning of the grill member 300 is accomplished by the hydraulic cleaning action of the high pressure jets 424.

The sand discharge cleaning structure 630 includes: the exhaust pipe 631 and the flushing water pipe 632, the exhaust pipe 631 and the flushing water pipe 632 are all disposed on the blocking structure 640. The exhaust pipe 631 and the flushing water pipe 632 are operated simultaneously, and the sand setting filter structure 520 can be flushed. The sand discharge cleaning structure 630 is used for washing the sand setting filter structure 520 in a back washing manner.

In this embodiment, the blocking structure 640 is a gate valve. The sand setting filtering structure 520 comprises three screens with sequentially reduced apertures, wherein the three screens are sequentially arranged from top to bottom, and a filter 530 is arranged below the sand setting filtering structure 520. The valve 620 is an electrically controlled butterfly valve.

The lower end of the extension pipe 610 is provided with a sand collection tank 650, after inorganic matters accumulated at the bottom of the sand discharge system and inorganic matters accumulated on the surface of the screen mesh are flushed to the sand collection tank 650 by the exhaust pipe 631 and the flushing water pipe 632, the upper end of the sand collection tank 650 is provided with a slag lifting hole 651 and an air inlet hole 652, a slag blocking filter plate 653 is arranged inside the sand collection tank 650, air flow released by the blower enters the sand collection tank 650 through the air inlet hole 652, and sand and stone in the sand collection tank 650 is lifted to a solid-liquid separation zone on the ground through the slag lifting hole 651 after the air flow exhausted from the air inlet hole 652 passes through the slag blocking filter plate 653, so that gas stripping and slag discharge are realized. The device lifts the solids accumulated by sand storage to a solid-liquid separation zone on the ground in a gas stripping sand discharging mode.

In this embodiment, the aperture of the grid mesh 320 is smaller than the particle size of the grid slag, and the aperture of the grid mesh 320 is 5mm or 10 mm.

The opening on the screen can adopt 20 meshes, 100 meshes, 200 meshes, 50 meshes or 150 meshes; the screen mesh can adopt 20 meshes: 100 meshes: 200 mesh or 50 mesh: 150-purpose set combination.

The water pump used by the grille cleaning mechanism 420 and the water pump used by the sand discharging cleaning structure 630 can be the same water pump, the controller 800 is set at different priorities, and the grille cleaning mechanism 420 and the sand discharging cleaning structure 630 are started when the water pumps respectively reach set values; when the above-mentioned grating cleaning mechanism 420 and the sand discharge cleaning structure 630 reach the set value at the same time, the backwashing is preferentially performed for the sand discharge cleaning structure 630.

The water outlet hole at the bottom of the grating box body 100 is mainly used for collecting sewage separated by the grating groove 310 and the replaceable grating net 320 in the grating groove 310, maintaining the liquid level elevation in the grating box body 100 and ensuring the smooth operation of a subsequent treatment link; the calculation mode of water outlet holes adopts the calculation mode of small hole outflow.

The grill tank 310 is preferably made of SS304 stainless steel, and serves as a support and fixing member for the replaceable grill net 320 and also as a fixing member for the liquid level monitor 720.

The grid net 320 is made of PVDF lining steel wires, the shape of the openings of the grid net 320 is not limited, and the openings can be in the form of ribs, rectangles, circles, hexagons and the like. When the openings of the grid mesh 320 are circular, the diameter of the openings of the grid mesh can be 5-20mm according to the process requirements.

The sewage of the preliminary solid-liquid separation of grid part 300 gets into subsequent honeycomb duct 110 along the apopore at grid box 100 middle part and carries out the sand-water separation, and the screen cloth is the downward sloping setting, and the contained angle between screen cloth and the horizontal plane is 20-25, and the screen cloth is for adopting 22.5 reverse current direction, and through the effect of screen cloth, the solid that the particle diameter is greater than the screen cloth diameter gets into filter 530 under the screen cloth, and sewage gets into follow-up collection sand groove 650 through the screen cloth to promote the grit in the collection sand groove 650.

The utility model also relates to a sewage treatment method, which adopts a sewage pretreatment device, sewage enters the sewage pretreatment device through the sewage inlet pipeline 200 for pretreatment, and substances with the particle size larger than the mesh diameter of the grid part 300 in the sewage are intercepted inside the grid part 300 to form grid slag; substances in the sewage, the particle size of which is smaller than the diameter of the meshes of the grating member 300, pass through the grating member 300 and enter the grating housing 100;

when the water level in the grating box 100 reaches a certain height, the sewage pretreated by the grating net 320 is acted by hydrostatic pressure, the sewage in the grating box 100 passes through the draft tube 110, the sand setting filtering structure 520 makes particles in the sewage passing through the horizontal tube part 112 adhere to the sand setting filtering structure 520, the particles in the sewage with the particle diameter larger than the mesh aperture of the sand setting filtering structure 520 are intercepted on the sand setting filtering structure 520, and the sewage is discharged after passing through the horizontal tube part 112;

the liquid level monitor 720 sends the monitored liquid level value inside the grating box 100, the monitored liquid level value inside the grating component 300 and the monitored liquid level value of the sewage inlet pipeline 200 to the controller 800;

the weight monitor 710 monitors the weight of the grill member 300;

the controller 800 calculates to obtain an actual first liquid level value, wherein the first liquid level value is a difference value between a liquid level value of sewage entering the pipeline 200 and a liquid level value inside the grid part 300, and when the controller 800 judges that the actual first liquid level value is smaller than a preset first liquid level value, the controller 800 controls the grid lifting and overturning mechanism 410 to carry out slag removal operation on the grid part 300;

when the controller 800 judges that the actual weight of the grill member 300 is greater than the preset weight of the grill member 300, the controller 800 controls the grill lifting and overturning mechanism 410 to perform a slag removal operation on the grill member 300;

the slag removal operation comprises the following steps:

step 1) closing a gate;

step 2) the controller 800 controls the grid lifting and overturning mechanism 410 to lift and overturn the grid part 300, and then the grid slag in the grid part 300 is poured out;

step 3) the controller 800 controls the grill cleaning mechanism 420 to flush the grill member 300;

step 4), the controller 800 controls the grating lifting and overturning mechanism 410 to drive the grating component 300 to reset into the grating box body 100;

step 5), opening a gate;

when the controller 800 judges that the liquid level value inside the grating box body 100 monitored by the liquid level monitor 720 is greater than the preset liquid level value inside the grating box body 100, the controller 800 controls the sand discharge assembly to start sand discharge operation;

the controller 800 calculates to obtain an actual second liquid level value, wherein the second liquid level value is a difference value between the liquid level value of the grating box body 100 and the liquid level value inside the grating component 300, and when the controller 800 judges that the actual second liquid level value is smaller than a preset second liquid level value, the controller 800 controls the sand discharge assembly to start sand discharge operation;

the sand discharge operation comprises the following steps:

step 1), the controller 800 controls the blocking structure 640 to descend, and the controller 800 controls the valve 620 to open;

step 2) the controller 800 controls the sand discharge cleaning structure 630 to wash the sand setting filter structure 520.

The sewage pretreatment device can solve the problems of large water quality and water quantity fluctuation, more suspended matters, more inorganic silt and other particles of rural sewage, and also considers the actual operation and maintenance current situation of rural sewage treatment facilities, and also considers the problems of improving the automation degree to reduce the operation and maintenance pressure and reduce the occupied area of a pretreatment section.

Further, the grill member 300 includes a grill groove 310 and a replaceable grill net 320 disposed inside the grill groove 310;

when the controller 800 judges that the number of times of slag removal operation of the grid member 300 reaches the preset maximum number of times of slag removal operation of the grid member 300, the controller 800 starts a grid mesh 320 replacement prompt to perform grid mesh 320 replacement operation;

when the controller 800 judges that the level value inside the grille part 300 which is washed and is positioned in the grille box 100 reaches the preset level value corresponding to the replacement grille net 320, the controller 800 starts the replacement prompt of the grille net 320 to perform the replacement operation of the grille net 320;

when the controller 800 determines that the cleaning time interval between two adjacent grid members 300 is smaller than the preset cleaning time interval of the grid members 300, the controller 800 starts a grid net 320 replacement prompt to perform a grid net 320 replacement operation;

the grille net 320 replacement operation comprises the steps of:

step 1) closing a gate;

step 2) the controller 800 controls the grille lifting and overturning mechanism 410 to lift the grille part 300, and then the grille net 320 in the grille part 300 is replaced;

step 3) the controller 800 controls the grating lifting and overturning mechanism 410 to drive the grating component 300 to reset into the grating box 100;

and 4) opening the gate.

The replacement operation of the grid net 320 is used for achieving the service life of the grid net 320 after the grid net 320 finishes deslagging and cleaning at a certain frequency, and the grid net 320 is replaced to update the grid net 320, so that the effectiveness of the sewage pretreatment device is ensured.

In this embodiment, the sand collection tank 650 is provided with a slag-stopping filter plate. The setting of pushing off the slag filter plate prevents because there is the large granule to get into the gas supply line and to the gas supply line certain possibility of blocking in the solid-liquid separation in-process for the maintenance of gas supply line is more convenient.

The sewage pretreatment device has the advantages of simple structure, low cost, low energy consumption, automatic control and convenient sewage disposal, and the sewage pretreatment method is suitable for rural sewage treatment projects; the sewage pretreatment device can effectively separate solid particles with the particle size of more than 100 micrometers, and reduce the treatment pressure of a subsequent biochemical section.

In conclusion, the present invention effectively overcomes various disadvantages of the prior art and has high industrial utilization value.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the utility model. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (7)

1. A sewage pretreatment device, comprising:

the device comprises a grid box body (100), wherein the grid box body (100) is communicated with an output end (210) of a sewage inlet pipeline (200), and a gate is arranged on the output end (210) of the sewage inlet pipeline (200);

a grid lifting and turning mechanism (410) inserted into the grid box body (100);

a grid member (300) mounted on the grid lifting and turning mechanism (410);

a grid cleaning mechanism (420) arranged above the grid box body (100);

the guide pipe (110) comprises a vertical pipe part (111) and a horizontal pipe part (112) connected with the lower end of the vertical pipe part (111), and the upper end of the vertical pipe part (111) is connected and communicated with the bottom of the grating box body (100);

the sand setting assembly comprises a supporting pipe (510) and a sand setting filtering structure (520), the upper end of the supporting pipe (510) is connected with the horizontal pipe part (112), the sand setting filtering structure (520) is arranged at the joint of the supporting pipe (510) and the horizontal pipe part (112), and the sand setting filtering structure (520) is obliquely arranged relative to the horizontal plane;

the sand discharge assembly comprises an extension pipe fitting (610), a valve (620), a sand discharge cleaning structure (630) and a liftable blocking structure (640), wherein the blocking structure (640) is arranged at the joint of the support pipe fitting (510) and the horizontal pipe part (112), the blocking structure (640) is arranged on the horizontal pipe part (112), and the sand discharge cleaning structure (630) is arranged on the blocking structure (640); when the blocking structure (640) descends into the horizontal pipe part (112), the blocking structure (640) blocks water flow from entering the supporting pipe (510), the extension pipe (610) is connected with the lower end of the supporting pipe (510), and a valve (620) is arranged on the extension pipe (610);

a weight monitor (710) mounted on the grid member (300);

a liquid level monitor (720) for monitoring a liquid level value inside the grating box body (100), a liquid level value inside the grating component (300) and a liquid level value of the sewage inlet pipeline (200);

a controller (800), the gate the grid promote tilting mechanism (410) the grid wiper mechanism (420) valve (620) arrange the sand and wash structure (630) weight monitor (710) liquid level monitor (720) with block structure (640) all with controller (800) are connected.

2. The sewage pretreatment device according to claim 1, characterized in that: the grill member (300) includes a grill groove (310) and a plurality of grill nets (320) disposed inside the grill groove (310).

3. The sewage pretreatment device according to claim 1, characterized in that: the grid lifting and turning mechanism (410) comprises: the grille guide rail comprises a grille guide rail (411) and a driving part (412), wherein the grille guide rail (411) comprises a vertical guide rail part (4111) and an arc guide rail part (4112) connected with the top of the vertical guide rail part (4111), the grille part (300) is movably connected with the grille guide rail (411), and the driving part (412) is connected with the grille part (300); the driving component (412) drives the grid component (300) to move along the grid guide rail (411); the drive component (412) is connected to the controller (800).

4. The sewage pretreatment device according to claim 1, characterized in that: the grill cleaning mechanism (420) includes: pulley (421), the winding is equipped with direction chain (422) on pulley (421), direction chain (422) connection support frame (423), install a plurality of shower nozzles (424) on support frame (423).

5. The sewage pretreatment device according to claim 4, characterized in that: the support frame (423) comprises a main frame body (4231) connected with the guide chain (422), a plurality of telescopic frame bodies (4232) are arranged on the main frame body (4231), and each main frame body (4231) is provided with the spray head (424).

6. The sewage pretreatment device according to claim 1, characterized in that: the sand discharge cleaning structure (630) comprises: an exhaust pipe (631) and a flushing water pipe (632), the exhaust pipe (631) and the flushing water pipe (632) are both arranged on the blocking structure (640).

7. The sewage pretreatment device according to claim 1, characterized in that: the lower end of the extension pipe fitting (610) is provided with a sand collecting groove (650).

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