CN112237764B

CN112237764B - Primary treatment equipment and treatment process for urban domestic sewage

Info

Publication number: CN112237764B
Application number: CN202010975948.4A
Authority: CN
Inventors: 王作洋; 柴红鹰; 肖京京; 魏俊祥
Original assignee: Shenzhen Nanfang Water Co ltd
Current assignee: Shenzhen Nanfang Water Co ltd
Priority date: 2020-09-16
Filing date: 2020-09-16
Publication date: 2021-11-02
Anticipated expiration: 2040-09-16
Also published as: CN112237764A

Abstract

The utility model relates to an urban domestic sewage preliminary treatment equipment and processing technology thereof, include first filtering ponds and the second filtering ponds that set gradually along the rivers direction, set up the division board of slope between first filtering ponds and the second filtering ponds, a plurality of coarse filtration pores have been seted up on the division board, be provided with in the first filtering ponds and be used for clearing out the outer debris filter equipment of first filtering ponds with the great debris of sewage, be provided with in the second filtering ponds and be used for clearing out the outer thin grid filter equipment of second filtering ponds with less debris in the sewage, the delivery port of second filtering ponds has sewage treatment equipment through the pipeline intercommunication. This application has the automatic effect of clearing out from first filtering ponds and second filtering ponds of follow of debris in the sewage, and effectual reduction sewage treatment device's workload has also reduced staff's workload when having improved sewage treatment device's sewage treatment efficiency.

Description

Primary treatment equipment and treatment process for urban domestic sewage

Technical Field

The application relates to the technical field of sewage treatment, in particular to primary treatment equipment and a treatment process for urban domestic sewage.

Background

At present, domestic sewage is wastewater discharged in daily life of residents and mainly comes from residential buildings and public buildings, such as houses, institutions, schools, hospitals, shops, public places, industrial enterprise toilets and the like.

The pollutants contained in the existing domestic sewage are mainly organic matters (such as protein, carbohydrate, fat, urea, ammonia nitrogen and the like) and a large amount of pathogenic microorganisms (such as parasitic ova, intestinal infectious viruses and the like); organic matters existing in domestic sewage are extremely unstable and are easy to decay to generate stink; bacteria and pathogens propagate in large quantities by taking organic matters in the domestic sewage as nutrition, which can cause epidemic diseases, so the domestic sewage must be treated before being discharged, and therefore, sewage treatment equipment for treating the domestic sewage is produced, and the sewage treatment equipment can sterilize and purify the domestic sewage.

In view of the above-mentioned related art, the inventors consider that the following technical drawbacks exist: because there are more debris in the domestic sewage, if directly will include the domestic sewage direct discharge of more debris and handle in sewage treatment device, not only can increase sewage treatment device's work load, reduced sewage treatment device's sewage treatment efficiency moreover, consequently, need further improvement.

Disclosure of Invention

The utility model provides a not enough to prior art exists, an aim at of this application provides a municipal domestic sewage preliminary treatment equipment, have effectually clear up the debris in the sewage, thereby not only the effectual work load that reduces sewage treatment equipment, and the sewage treatment efficiency's of sewage treatment equipment effect has been improved, an aim at of this application lies in providing a municipal domestic sewage preliminary treatment equipment's processing technology, it clears out in first filtering ponds and the second filtering ponds the debris of sewage are automatic to have, the effect of the direct manual work load of clearing up of staff has also been reduced when improving work efficiency.

The application provides a municipal domestic sewage preliminary treatment equipment and treatment process adopts following technical scheme:

the utility model provides an urban domestic sewage preliminary treatment equipment, includes first filtering ponds and the second filtering ponds that set gradually along the rivers direction, set up the division board of slope between first filtering ponds and the second filtering ponds, a plurality of thick filtration pores of crossing have been seted up on the division board, be provided with in the first filtering ponds and be used for clearing out the outer debris filter equipment of first filtering ponds with the great debris of sewage, be provided with in the second filtering ponds and be used for clearing out the outer thin grid filter equipment of second filtering ponds with less debris in the sewage, the delivery port of second filtering ponds has sewage treatment equipment through the pipeline intercommunication.

Through adopting above-mentioned technical scheme, under the filtering action of division board, sewage passes through the coarse filtration pore flow direction second on the division board and filters the pond in, and outside the first filtering ponds of great debris then clearing out under debris filter equipment's effect in sewage, outside the second filtering ponds are cleared out with less debris in the sewage under thin grid filter equipment's effect, the effectual debris with in sewage of whole process are cleared up, thereby not only effectual reduction sewage treatment device's work load, sewage treatment device's sewage treatment efficiency has been improved moreover.

Optionally, the opening part of first filtering ponds is provided with the support frame, the support frame includes two vertical settings in the riser of first filtering ponds opening part and keeps away from the one end vertical fixation's of first filtering ponds loading board with two risers, debris filter equipment is including setting up actuating mechanism, two fixed connection that keep away from one side of riser in the loading board back to the channel-section steel of one side of second filtering ponds in the partition plate and set up between two channel-section steels and can follow the clearance fill that the extending direction of channel-section steel slided, two the opening of channel-section steel sets up relatively, just the incline direction of channel-section steel is unanimous with the incline direction of partition plate, actuating mechanism is used for the drive clearance to fight and slides along the extending direction of channel-section steel.

Through adopting above-mentioned technical scheme, the setting of clearance fill is used for bearing the debris in the sewage, under the mating action of channel-section steel for the clearance fill slides along the extending direction of channel-section steel under actuating mechanism's actuating action, thereby conveys the predetermined position with the debris that the clearance was fought and clears up.

Optionally, a mounting frame is arranged on one side of each of the two vertical plates close to the water inlet of the first filtering tank, the mounting frame comprises two mounting plates horizontally arranged on one side of the water inlet of the first filtering tank close to the two vertical plates respectively and a mounting column fixedly connected with one side of each of the two mounting plates, opposite ends of the mounting column are respectively close to the two mounting plates, two mounting blocks are arranged on one side of each of the mounting columns close to the vertical plates, swing arms are hinged to opposite sides of the two mounting blocks, a scraper is arranged between the two swing arms, opposite ends of the scraper are respectively fixedly connected with one ends of the two swing arms far away from the hinged parts, the scraper is abutted against the inner bottom wall of the cleaning bucket, a reset spring for adjusting the scraping radian of the scraper is arranged between each swing arm and the bearing plate, and opposite ends of the reset spring are respectively fixedly connected with the swing arms and one side of the bearing plate close to the vertical plates, and the second filtering tank is provided with a collecting box with an opening at the upper part, and the collecting box is positioned at one side of the separation plate, which is far away from the cleaning hopper.

Through adopting above-mentioned technical scheme, at the in-process that the clearance fill rises, make the scraper blade be close to swing arm one side inner wall butt with the arc, at the in-process that the clearance fill continues to rise, the scraper blade is close to the direction swing of mounting bracket along the inner arc side direction of arc to the debris that the scraper blade was fought in with the clearance are scraped the collecting box and are collected, and at the in-process that the clearance fill descends, under reset spring's reset action, the scraper blade resumes initial condition.

Optionally, the cleaning bucket comprises an arc-shaped plate and sector plates arranged at two opposite sides of the arc-shaped plate, pulleys are arranged at one sides of the two sector plates, which are far away from the arc-shaped plate, the two pulleys are respectively connected with one sides of the two channel steels, which are far away from the partition plate in a sliding manner, guide wheels are arranged at one sides of the two sector plates, which are opposite to each other, the guide wheels and the pulleys on the same sector plate are respectively positioned at two opposite ends of the sector plate, the guide wheel extends into the adjacent channel steel and is connected with the two inner side walls of the channel steel in a sliding way, one sides of the two sector plates far away from the arc-shaped plate are respectively hinged with two connecting arms, the pulley and the connecting arms on the same sector plate are positioned on the same arc line, the one end that the articulated department in its place was kept away from to the linking arm is provided with the guide block, the guide block sets up in one side that the linking arm is fought back to the clearance, the guide block extends to rather than adjacent in the channel-section steel and with the channel-section steel connection that slides.

Through adopting above-mentioned technical scheme, under the cooperative action of pulley, leading wheel and guide block for the clearance fill more steady along the extending direction of channel-section steel slide.

Optionally, actuating mechanism including set up in the loading board keep away from first driving piece, two fixed connection on the loading end of riser one side and the relative supporting seat that sets up, set up between two supporting seats and the output shaft fixed connection's of tip and first driving piece first connecting axle, cover locate on the first connecting axle and with first connecting axle fixed connection's first serving and second serving and fixed connection on the first connecting axle and lie in the driving gear between first serving and the second serving, the relative both ends of first connecting axle pass two supporting seats respectively and rotate with two supporting seats and be connected, two one side that the sector board is close to each other all is provided with the connecting seat, it has first wire rope to wind on the first serving, it has second wire rope to wind on the second serving, the one end that first wire rope was kept away from to first serving passes the loading board and extends to on the connecting seat corresponding with its position and through first hasp and this is connected And one end of the second steel wire rope, which is far away from the second rope winder, penetrates through the bearing plate to extend to the connecting seat corresponding to the position of the bearing plate, and is fastened with the connecting seat through a second lock catch.

Through adopting above-mentioned technical scheme, actuating mechanism's setting is used for switching the clearance that is located first filtration pond and fights the state to make the clearance fight and be in the state of keeping flat when being located first filtration pond, with bearing more debris, when needs fight the clearance and rise and clear the material, reversal actuating mechanism fights the clearance and switches into the state of perk, thereby makes the clearance fight interior debris more surely by the rise.

Optionally, an adjusting device is further disposed on one side of the bearing plate away from the vertical plate, the adjusting device includes a sliding seat disposed on the bearing surface of the bearing plate, a second connecting shaft disposed on the sliding seat, a third rope winder fixedly connected to the second connecting shaft, a driven gear fixedly connected to the second connecting shaft and corresponding to the driving gear, and a second driving member disposed on one side of the bearing plate away from the mounting bracket for driving the driven gear to move toward the driving gear, a third steel wire rope is wound on the third rope winder, a strip hole for the third steel wire rope to pass through is disposed on the bearing plate, one end of the third steel wire rope remote from the third rope winder is fixedly connected to one side of the arc plate remote from the partition plate, a T-shaped block is disposed on one side of the sliding seat near the bearing plate, and a T-shaped groove matched with the T-shaped block is disposed on the bearing surface of the bearing plate, the T-shaped block slides and is connected with the T-shaped groove, a lead screw is arranged in the T-shaped groove, an output shaft of the second driving piece extends to the T-shaped groove and is fixedly connected with the end part of the lead screw, one end, far away from the second driving piece, of the lead screw penetrates through the T-shaped block and is in threaded connection with the T-shaped block, and one end, far away from the second driving piece, of the lead screw is rotatably connected with the inner end wall of the T-shaped groove.

Through adopting above-mentioned technical scheme, adjusting device's setting is used for making driven gear and driving gear meshing or break away from.

Optionally, a locking assembly is further arranged on the bearing plate, the locking assembly comprises two lifting cylinders which are oppositely arranged and vertically arranged on the bearing surface of the bearing plate, a lifting plate fixedly connected with the telescopic ends of the two lifting cylinders, a brake block which is arranged on one side of the lifting plate close to the bearing plate and is positioned between the two lifting cylinders, and a brake gear which is arranged on the end part of the second connecting shaft and is positioned between the two lifting cylinders, the brake gear is positioned on one side of the driven gear far away from the third rope winder, and sharp teeth matched with the teeth of the brake gear are arranged at one end of the brake block far away from the lifting plate.

By adopting the technical scheme, the locking assembly is arranged for preventing the third rope winder from rotating when the driven gear is separated from the driving gear, and when the third rope winder needs to be locked, the lifting cylinder enables sharp teeth on the brake block to be in inserted fit with the brake gear, so that the rotation of the second connecting shaft is limited; when the third rope winder needs to be unlocked, the sharp teeth on the brake block are separated from the brake gear.

Optionally, the fine grid filtering device is disposed on a side of the partition plate away from the first filtering tank, the fine grid filtering device includes a third driving member, a first filter cartridge, a second filter cartridge, a third filter cartridge and a conveying shaft disposed in the second filter cartridge and the third filter cartridge, a first notch with an opening facing the partition plate is disposed on an outer circumferential surface of the first filter cartridge, the second filter cartridge and the first filter cartridge are coaxially disposed, the second filter cartridge is inserted into the first filter cartridge, a second notch with the same direction as the first notch is disposed on an outer circumferential surface of the second filter cartridge extending to the first filter cartridge, the third filter cartridge and the second filter cartridge are coaxially disposed, a radius of the third filter cartridge is equal to a radius of the second filter cartridge, and one end of the third filter cartridge extends to the first filter cartridge and is communicated with the second filter cartridge, the third driving part is installed on the end face, far away from the first filter cartridge, of the third filter cartridge, the conveying shaft is coaxially arranged with the second filter cartridge and the third filter cartridge, the output shaft of the third driving part penetrates through the end face, far away from the first filter cartridge, of the third filter cartridge and is fixedly connected with the end of the conveying shaft, the outer peripheral face of the conveying shaft is provided with a screw propeller blade, one end, far away from the third driving part, of the conveying shaft is provided with a guide assembly, the diameter of the conveying shaft is gradually increased from the second filter cartridge to the third filter cartridge, fine filter holes are formed in the outer peripheral faces of the third filter cartridge and the first filter cartridge, the aperture of each fine filter hole is smaller than that of each coarse filter hole, and the outer peripheral face of the third filter cartridge is provided with a discharge hopper.

Through adopting above-mentioned technical scheme, under the effect of direction subassembly, with the less debris propelling movement in the first cartridge filter to the second cartridge filter, under the mating reaction of carrying axle and propeller blade, compress and solid-liquid separation with less debris in the second cartridge filter.

Optionally, the guide assembly comprises a guide rod arranged on the side of the conveying shaft away from one end of the third driving part, a guide plate vertically fixed on the guide rod away from one end of the conveying shaft, and bristles uniformly and densely distributed on one side, back to the second filter cartridge, of the guide plate, and one end, away from the guide plate, of the bristles is abutted to the inner side wall of the first filter cartridge.

Through adopting above-mentioned technical scheme, under the driving action of third driving piece, pivoted delivery shaft drives the guide bar and rotates, under the common pushing action of stock guide and brush hair, promotes the top in the second cartridge filter from the second breach with less debris in the first cartridge filter, has realized handling in the automatic less debris propelling movement to the second cartridge filter with in the first cartridge filter.

A treatment process adopting any one of the above primary treatment equipment for urban domestic sewage comprises the following steps:

the method comprises the following steps: domestic sewage is discharged into the first filtering tank from the water inlet, the first connecting shaft is driven to rotate through the first driving piece, the first steel wire rope and the second steel wire rope lift the cleaning bucket to be close to two sides of the partition plate, at the moment, the cleaning bucket is changed from an original tilted state into a flat state, and large sundries in the sewage are blocked on the partition plate and fall into the cleaning bucket for collection;

step two: the first driving part is driven in a reverse direction, under the matching action of the first steel wire rope and the second steel wire rope, the cleaning bucket in a flat state is enabled to tilt, the second driving part is started, the second driving part drives the screw rod to rotate, so that the T-shaped block drives the sliding seat to move towards the direction close to the second driving part until the driven gear and the driving gear are meshed with each other, the second driving part stops running, the first driving part is driven to enable the first steel wire rope, the second steel wire rope and the third steel wire rope to simultaneously drive the cleaning bucket to stably lift along the extending direction of the channel steel, in the process that the cleaning bucket gradually rises, the scraper blade swings along the direction of the inner arc side of the arc plate towards the mounting frame, so that larger sundries in the cleaning bucket are scraped into the collecting box to be collected, at the moment, the reset spring is in a compressed state, after the cleaning bucket is cleaned, under the reverse driving action of the first driving part, the cleaning bucket descends, and the return spring returns the swing arm, so that the swing arm is restored to the initial state;

step three: sewage containing small impurities flows into a first filter cartridge in a second filter cartridge, the sewage is finally discharged from a water outlet of the second filter cartridge through a fine filter hole, the small impurities are collected in the first filter cartridge to drive a third driving piece, the third driving piece drives a conveying shaft to rotate, the rotating conveying shaft simultaneously drives a screw propeller blade and a guide rod to rotate, the guide rod drives bristles on a material guide plate to rotate along the inner side wall of the first filter cartridge, and the small impurities falling into the first filter cartridge are pushed into the second filter cartridge under the common pushing action of the material guide plate and the bristles;

step four: the rotatory propeller blade conveys the less debris in the second cartridge filter to the third cartridge filter, discharges through discharging the fill at last, simultaneously at the less debris of propeller blade conveying in-process, because the diameter of carrying the axle grow gradually, lead to the volume between the propeller blade to diminish gradually, less debris are also compressed gradually, make the solid and the liquid separation in the less debris through the compression, the filtrating is discharged to the second filtering ponds through the fine filtration pore on the third cartridge filter, discharges from the delivery port at last.

Through adopting above-mentioned technical scheme, under debris filter equipment and fine grid filter equipment's common cooperation, with the automatic first filtering ponds of follow of debris in the sewage and the interior clearance of second filtering ponds, reduced artifical manual flow of clearing up debris in first filtering ponds and the second filtering ponds respectively, also reduced staff's work load when improving work efficiency.

In summary, the present application includes at least one of the following beneficial technical effects:

1. under the filtering action of the partition plate, sewage flows into the second filtering tank through the coarse filtering holes in the partition plate, larger impurities in the sewage are removed out of the first filtering tank under the action of the impurity filtering device, and smaller impurities in the sewage are removed out of the second filtering tank under the action of the fine grid filtering device, so that the impurities in the sewage are effectively cleaned in the whole process, the workload of sewage treatment equipment is effectively reduced, and the sewage treatment efficiency of the sewage treatment equipment is improved;

2. under debris filter equipment and fine grid filter equipment's common mating reaction, clear out in the automatic first filtering ponds of follow of debris in the sewage and the second filtering ponds, reduced artifical manual flow of clearing up debris in following first filtering ponds and the second filtering ponds respectively, also reduced staff's work load when improving work efficiency.

Drawings

Fig. 1 is a schematic view of the overall structure of the present application.

Fig. 2 is a schematic sectional structure view of fig. 1.

Fig. 3 is a schematic structural diagram of a support frame, a mounting frame and a sundry filtering device in the application.

Fig. 4 is a schematic diagram of the exploded structure of fig. 3.

Fig. 5 is a schematic structural view of a portion a in fig. 4.

Fig. 6 is a schematic structural view of a portion B in fig. 4.

Fig. 7 is a schematic view of the construction of the fine grid filter arrangement of the present application.

Fig. 8 is a schematic structural view of a portion C in fig. 7.

Fig. 9 is a schematic cross-sectional structure of fig. 7.

Description of reference numerals: 1. a first filtration tank; 11. a water inlet; 12. a partition plate; 121. coarse filtering holes; 13. a support frame; 131. a carrier plate; 1311. a strip hole; 132. a vertical plate; 133. a T-shaped slot; 134. a screw rod; 2. a second filtration tank; 21. a water outlet; 3. a sundry filtering device; 31. channel steel; 311. a sliding strip; 4. a fine grid filtration device; 41. a third driving member; 42. a first filter cartridge; 421. a first notch; 43. a second filter cartridge; 431. a second notch; 432. a guide plate; 44. a third filter cartridge; 441. fine filtration pores; 442. a discharge hopper; 45. a delivery shaft; 451. a propeller blade; 46. a guide assembly; 461. a guide bar; 462. a material guide plate; 463. brushing; 47. a shower pipe; 471. a spray head; 5. cleaning the bucket; 51. an arc-shaped plate; 52. a sector plate; 521. a pulley; 5211. a chute; 522. a guide wheel; 523. a connecting arm; 5231. a guide block; 524. a connecting seat; 5241. a rotating shaft; 6. a drive mechanism; 61. a first driving member; 62. a supporting seat; 63. a first connecting shaft; 64. a first cord winder; 641. a first wire rope; 642. a first lock catch; 65. a second rope winder; 651. a second wire rope; 652. a second lock catch; 66. a driving gear; 7. a mounting frame; 71. mounting a plate; 72. mounting a column; 721. mounting blocks; 722. tightly abutting against the bolt; 73. a swing arm; 731. a return spring; 74. a squeegee; 75. a collection box; 8. an adjustment device; 81. a sliding seat; 811. a base plate; 812. a side plate; 813. a T-shaped block; 82. a second connecting shaft; 83. a third rope winder; 831. a third wire rope; 84. a driven gear; 85. a second driving member; 86. a locking assembly; 861. a lifting cylinder; 862. a lifting plate; 863. a brake pad; 864. a brake gear; 865. tines.

Detailed Description

The present application is described in further detail below with reference to figures 1-9.

The embodiment of the application discloses urban domestic sewage primary treatment equipment and a treatment process thereof. As shown in fig. 1 and 2, the device comprises a first filtering tank 1 and a second filtering tank 2 which are sequentially arranged along the water flow direction, wherein a water inlet 11 is formed in one side of the first filtering tank 1, which is far away from the second filtering tank 2, and a water outlet 21 is formed in one side of the second filtering tank 2, which is far away from the first filtering tank 1; the water inlet 11 is located above the water outlet 21. The water outlet 21 of the second filtering tank 2 is communicated with a sewage treatment device (not shown in the figure) through a pipeline, the first filtering tank 1 is internally provided with a sundries filtering device 3, and the second filtering tank 2 is internally provided with a fine grid filtering device 4.

Wherein, the openings of the first filtering tank 1 and the second filtering tank 2 are parallel and level, and the depth of the first filtering tank 1 is less than that of the second filtering tank 2. Set up division board 12 between first filtering ponds 1 and the second filtering ponds 2, division board 12 slope sets up, one side of division board 12 and the diapire fixed connection of first filtering ponds 1, the incline direction of division board 12 to the one side tilt up setting of keeping away from first filtering ponds 1 diapire, division board 12 keeps away from one side of first filtering ponds 1 diapire and the opening parallel and level of second filtering ponds 2. A plurality of coarse filter holes 121 are formed in the partition plate 12, and the coarse filter holes 121 are uniformly distributed on the partition plate 12.

As shown in fig. 1 and 3, a support frame 13 is arranged at the opening of the first filtering tank 1, and the support frame 13 includes a bearing plate 131 and two vertical plates 132 vertically arranged at the opening of the first filtering tank 1; two risers 132 set up relatively, and the same end of two risers 132 respectively with the both sides wall top surface fixed connection of first filtering ponds 1, the one end that first filtering ponds 1 were kept away from to two risers 132 and one side fixed connection that loading board 131 is close to first filtering ponds 1.

As shown in fig. 2 and 3, the sundries filtering device 3 comprises two channel steels 31 fixedly connected to one side of the partition plate 12 back to the second filtering tank 2, a cleaning bucket 5 arranged between the two channel steels 31, and a driving mechanism 6 arranged on one side of the bearing plate 131 far away from the vertical plate 132 and used for driving the cleaning bucket 5; the two channel steels 31 are obliquely arranged, and the two channel steels 31 are positioned between the two vertical plates 132; the openings of the two channel steels 31 are arranged oppositely, and the inclination directions of the two channel steels 31 are consistent with the inclination direction of the partition plate 12. One end of the two channel steel 31 far away from the bottom wall of the first filtering tank 1 extends to the outside of the first filtering tank 1 and is fixedly connected with one side of the bearing plate 131 close to the first filtering tank 1.

As shown in fig. 3, the cleaning bucket 5 includes an arc-shaped plate 51 and sector plates 52 arranged on opposite sides of the arc-shaped plate 51, wherein pulleys 521 are arranged on both sides of the two sector plates 52 away from the arc-shaped plate 51, and the two pulleys 521 are connected with one sides of the two channel steels 31 away from the partition plate 12 in a sliding manner; meanwhile, in order to enable the mixing wheel to be connected with the channel steel 31 in a sliding mode more stably, the concave chute 5211 is annularly arranged on the outer peripheral surface of the pulley 521, the sliding strip 311 which is matched with the chute 5211 and is triangular is arranged on one side, away from the partition plate 12, of the channel steel 31, and the sliding strip 311 is connected with the chute 5211 in a sliding mode.

As shown in fig. 3 and 4, guide wheels 522 are further disposed on opposite sides of the two sector plates 52, the guide wheels 522 and the pulleys 521 on the same sector plate 52 are respectively located at opposite ends of the sector plate 52, and the guide wheels 522 extend into the adjacent channel steel 31 and are connected with two inner side walls of the channel steel 31 in a sliding manner. One sides of the two sector plates 52 far away from the arc-shaped plate 51 are respectively hinged with two connecting arms 523, and the pulley 521 and the connecting arms 523 on the same sector plate 52 are positioned on the same arc line; one end of the connecting arm 523, which is far away from the hinge where the connecting arm is located, is provided with a guide block 5231, the guide block 5231 is arranged on one side of the connecting arm 523, which is back to the cleaning bucket 5, and the guide block 5231 extends into the channel steel 31 adjacent to the connecting arm and is connected with the channel steel 31 in a sliding manner.

Therefore, sewage and sundries enter the first filtering tank 1 from the water inlet 11 of the first filtering tank 1, and the sundries in the sewage drop into the cleaning hopper 5 through the filtration of the coarse filtering holes 121 on the partition plate 12 in the process that the sewage flows to the second filtering tank 2; when the impurities in the cleaning bucket 5 need to be cleaned, the driving mechanism 6 lifts the cleaning bucket 5 along the extending direction of the channel steel 31 under the guiding action of the guide wheels 522 and the guide blocks 5231, so that the impurities collected in the cleaning bucket 5 are lifted.

As shown in fig. 3 and 4, a mounting frame 7 is arranged on one side of each of the two vertical plates 132 close to the water inlet 11 of the first filtering tank 1, the mounting frame 7 includes two mounting plates 71 horizontally arranged on one sides of the two vertical plates 132 close to the water inlet 11 of the first filtering tank 1 and a mounting column 72 fixedly connected with one sides of the two mounting plates 71, opposite ends of the mounting column 72 are respectively close to the two mounting plates 71, two mounting blocks 721 are arranged on one sides of the mounting column 72 close to the vertical plates 132, and the two mounting blocks 721 are arranged at intervals and are all fixedly connected with the mounting column 72. The opposite sides of the two mounting blocks 721 are hinged to swing arms 73, a scraper 74 is arranged between the two swing arms 73, and the two opposite ends of the scraper 74 are respectively fixedly connected with the ends of the two swing arms 73 far away from the hinged position.

As shown in fig. 3 and 5, a tightening bolt 722 screwed with the mounting block 721 is inserted into each mounting block 721, and the tightening bolt 722 penetrates through one end of the mounting block 721 and abuts against the corresponding swing arm 73. A return spring 731 is fixedly connected to a side of the swing arm 73 away from the corresponding abutting bolt 722, and one end of the return spring 731 away from the swing arm 73 is fixedly connected to a side of the bearing plate 131 close to the riser 132. The second filtering pond 2 is provided with a collecting box 75 with an upper opening, and the collecting box 75 is positioned on one side of the partition plate 12 far away from the cleaning hopper 5.

Therefore, under the action of the elastic force of the return spring 731, the swinging arm 73 inclines to a side away from the mounting frame 7 by a predetermined angle, and the abutting bolt 722 is adjusted to abut against the corresponding swinging arm 73 through the abutting bolt 722 so as to limit the swinging arm 73, so that the swinging arm 73 is at an optimal inclination angle; in the process of lifting the cleaning bucket 5, the scraper 74 can be abutted against the inner wall of the arc-shaped plate 51 close to one side of the swinging arm 73; in the process that the cleaning bucket 5 continues to rise, the scraper 74 swings along the inner arc side of the arc-shaped plate 51 in the direction close to the mounting frame 7, so that the scraper 74 scrapes sundries in the cleaning bucket 5 into the collecting box 75 for collection; the return spring 731 is in a compressed state and has an outward tension, and when the cleaning bucket 5 descends, the return spring 731 returns the swing arm 73, so that the swing arm 73 returns to the original state; thereby achieving the purpose of automatically discharging the sundries in the cleaning bucket 5.

As shown in fig. 3 and 6, the driving mechanism 6 includes a first driving member 61 disposed on one side of the supporting plate 131 far from the vertical plate 132, two supporting seats 62 fixedly connected to the supporting surface of the supporting plate 131 and disposed oppositely, a first connecting shaft 63 disposed between the two supporting seats 62 and having an end fixedly connected to an output shaft of the first driving member 61, a first rope winder 64 and a second rope winder 65 sleeved on the first connecting shaft 63 and fixedly connected to the first connecting shaft 63, and a driving gear 66 fixedly connected to the first connecting shaft 63 and located between the first rope winder 64 and the second rope winder 65, wherein two opposite ends of the first connecting shaft 63 respectively pass through the two supporting seats 62 and are rotatably connected to the two supporting seats 62. The connecting seats 524 are arranged on the sides of the two fan-shaped plates 52 close to each other, the connecting seats 524 are L-shaped, and included angles of the two connecting seats 524 are opposite to each other; the connecting blocks 524 and the guide wheels 522 of the same sector plate 52 are arranged opposite to each other, and a rotating shaft 5241 is arranged between each connecting block 524 and the adjacent sector plate 52. A first wire rope 641 is wound on the first rope winder 64, a second wire rope 651 is wound on the second rope winder 65, one end of the first wire rope 641, which is far away from the first rope winder 64, passes through the bearing plate 131 and extends to the connecting seat 524 corresponding to the position of the bearing plate and is fastened with the rotating shaft 5241 through the first lock 642, and one end of the second wire rope 651, which is far away from the second rope winder 65, passes through the bearing plate 131 and extends to the connecting seat 524 corresponding to the position of the bearing plate and is fastened with the rotating shaft 5241 through the second lock 652.

Therefore, in the process that the cleaning bucket 5 sinks below the liquid level of the first filtering tank 1, in order to enable the cleaning bucket 5 to be in a flat state, the first connecting shaft 63 is driven to rotate by the first driving piece 61, so that the first steel wire rope 641 and the second steel wire rope 651 lift the cleaning bucket 5 to be close to two sides of the partition plate 12, and the cleaning bucket 5 is in a flat state, so that more impurities can be accommodated.

As shown in fig. 3 and 6, an adjusting device 8 is further disposed on a side of the bearing plate 131 away from the vertical plate 132, the adjusting device 8 includes a sliding seat 81 disposed on a bearing surface of the bearing plate 131 and located between the mounting frame 7 and the driving mechanism 6, a second connecting shaft 82 disposed on the sliding seat 81, a third rope winder 83 sleeved on the second connecting shaft 82 and fixedly connected to the second connecting shaft 82, a driven gear 84 fixedly connected to the second connecting shaft 82 and corresponding to the driving gear 66, and a second driving member 85 disposed on a side of the bearing plate 131 away from the mounting frame 7 for driving the driven gear 84 to move toward a direction close to the driving gear 66; a third wire rope 831 is wound on the third rope winder 83, a long hole 1311 through which the third wire rope 831 can pass is formed in the bearing plate 131, and one end of the third wire rope 831, which is far away from the third rope winder 83, is fixedly connected with one side of the arc-shaped plate 51, which is far away from the partition plate 12.

As shown in fig. 4 and 6, the sliding seat 81 is a U-shaped seat with an opening facing vertically upward, and the sliding seat 81 includes a bottom plate 811 disposed on the bearing surface of the bearing plate 131 and side plates 812 disposed at two opposite ends of one side of the bottom plate 811 away from the bearing plate 131; the second connecting shaft 82 is disposed between the two side plates 812, and opposite ends of the second connecting shaft 82 are rotatably connected to the two side plates 812, respectively. One side that bottom plate 811 is close to loading board 131 is provided with T-shaped piece 813, offer on the bearing surface of loading board 131 with T-shaped piece 813 assorted T-slot 133, T-slot 133 extends along the width direction of loading board 131, and T-shaped piece 813 slides with T-slot 133 and is connected.

As shown in fig. 4 and 6, a screw 134 is disposed in the T-shaped groove 133, an output shaft of the second driving element 85 (see fig. 1) extends into the T-shaped groove 133 and is fixedly connected to an end of the screw 134, one end of the screw 134, which is far away from the second driving element 85 (see fig. 1), extends to a terminating end of the T-shaped groove 133 and is rotatably connected to an inner end wall of the T-shaped groove 133, and one end of the screw 134, which is far away from the second driving element 85, passes through the T-shaped block 813 and is in threaded connection with the T-shaped block 813.

Therefore, when sundries in the cleaning bucket 5 need to be cleaned, the first driving piece 61 is driven reversely, and the cleaning bucket 5 in a flat state is tilted under the matching action of the first steel wire rope 641 and the second steel wire rope 651; in order to raise the tilted bucket 5 more smoothly, the driving gear 66 and the driven gear 84 need to be meshed; the second driving member 85 is started, the second driving member 85 drives the screw rod 134 to rotate, due to the fact that the screw rod 134 is in threaded connection with the T-shaped block 813, under the guiding effect of the T-shaped block 813 and the T-shaped groove 133, the screw rod 134 drives the T-shaped block 813 to move towards the direction close to the second driving member 85 along the T-shaped groove 133, the T-shaped block 813 drives the sliding seat 81 to move towards the direction close to the second driving member 85 until the driven gear 84 and the driving gear 66 are meshed with each other, and the second driving member 85 stops running. At this time, the first driving member 61 is driven to make the first wire rope 641, the second wire rope 651 and the third wire rope 831 simultaneously drive the cleaning bucket 5 to stably rise along the extending direction of the channel steel 31.

As shown in fig. 6, in the process of disengaging the driven gear 84 and the driving gear 66, in order to prevent the third rope winder 83 from rotating, a locking assembly 86 is further disposed on the bearing plate 131, the locking assembly 86 includes two lifting cylinders 861 disposed oppositely and vertically mounted on the bearing surface of the bearing plate 131, a lifting plate 862 fixedly connected to the telescopic ends of the two lifting cylinders 861, a brake block 863 disposed on one side of the lifting plate 862 close to the bearing plate 131 and located between the two lifting cylinders 861, and a brake gear 864 disposed on the end of the second connecting shaft 82 and located between the two lifting cylinders 861; the brake gear 864 is located at a side of the driven gear 84 away from the third rope winder 83, and an end of the brake block 863 away from the lifter plate 862 is provided with tines 865 which fit into the teeth of the brake gear 864.

Therefore, in the process of self-locking the driven gear 84, the lifting cylinder 861 drives the lifting plate 862 to descend, so that the sharp teeth 865 on the brake block 863 are in insertion fit with the brake gear 864, thereby limiting the rotation of the second connecting shaft 82 and achieving the effect of locking the third rope winder 83.

As shown in fig. 1 and 7, the fine grid filtering device 4 is arranged on one side of the partition plate 12 far away from the first filtering tank 1; the fine grille filter device 4 is disposed obliquely, and the direction of inclination of the fine grille filter device 4 is disposed obliquely upward to a side away from the partition plate 12. The fine grid filter device 4 includes a third driving member 41, a first filter cylinder 42, a second filter cylinder 43, a third filter cylinder 44, and a conveying shaft 45 provided in the second filter cylinder 43 and the third filter cylinder 44; the first filter cylinder 42 is a hollow cylindrical cylinder with an open end, the opening of the first filter cylinder 42 faces the partition plate 12, and the outer peripheral surface of the first filter cylinder 42 is provided with a first notch 421 facing the partition plate 12. The second filter cylinder 43 is also a hollow cylindrical cylinder with an open end, the second filter cylinder 43 and the first filter cylinder 42 are coaxially arranged, and the radius of the second filter cylinder 43 is smaller than that of the first filter cylinder 42. The second filter cartridge 43 is inserted into the first filter cartridge 42; the second filter cylinder 43 extends to the inner peripheral surface of the first filter cylinder 42 and is provided with a second notch 431 in the same direction as the first notch 421. Two inclined guide plates 432 are symmetrically disposed at the second notch 431 of the second filter cylinder 43, and the inclined direction of the guide plates 432 is inclined upward in a direction away from the second filter cylinder 43.

As shown in fig. 1 and 7, the third filter cylinder 44 is arranged coaxially with the second filter cylinder 43, and the radius of the third filter cylinder 44 is equal to the radius of the second filter cylinder 43; one end of the third filter cartridge 44 extends into the first filter cartridge 42 to communicate with the second filter cartridge 43. Fine filter holes 441 are formed in the outer peripheral surfaces of the third filter cylinder 44 and the first filter cylinder 42; wherein, the aperture of the fine filtering hole 441 is smaller than that of the coarse filtering hole 121.

As shown in fig. 7 and 8, the third driving element 41 is mounted on the end surface of the third filter cylinder 44 away from the first filter cylinder 42, the delivery shaft 45 is coaxially arranged with the second filter cylinder 43 and the third filter cylinder 44, and the output shaft of the third driving element 41 passes through the end surface of the third filter cylinder 44 away from the first filter cylinder 42 and is fixedly connected with the end of the delivery shaft 45; one end of the conveying shaft 45, which is far away from the third driving element 41, is provided with two groups of guide assemblies 46 for guiding the sundries in the first filter cylinder 42 into the second filter cylinder 43, and the two groups of guide assemblies 46 are symmetrically arranged on the outer peripheral surface of the second filter cylinder 43.

As shown in fig. 7 and 8, the guiding assembly 46 includes a guiding rod 461 disposed on the side of the end of the transporting shaft 45 away from the third driving element 41, a material guiding plate 462 vertically fixed to the end of the guiding rod 461 away from the transporting shaft 45, and bristles 463 uniformly densely distributed on the side of the material guiding plate 462 opposite to the second filter cartridge 43, wherein the end of the bristles 463 away from the material guiding plate 462 abuts against the inner sidewall of the first filter cartridge 42.

As shown in fig. 7 and 8, in order to make the sundries attached to the material guiding plate 462 smoothly drop into the second filter cylinder 43, the first filter cylinder 42 is further provided with a spray pipe 47 which can be externally connected with a water source, and a plurality of spray heads 471 are uniformly distributed on one side of the spray pipe 47 close to the second gap 431 along the length direction thereof. When small impurities adhere to the material guiding plate 462, the spray head 471 flushes the material guiding plate 462, so that the small impurities adhering to the material guiding plate 462 are flushed into the second filter cartridge 43.

As shown in fig. 7 and 9, the conveying shaft 45 is provided with a screw blade 451 on its outer peripheral surface, and the diameter of the conveying shaft 45 gradually increases from the second filter cylinder 43 to the third filter cylinder 44. A discharge hopper 442 is arranged on the outer peripheral surface of the third filter cylinder 44, the discharge hopper 442 is located on the side of the third filter cylinder 44 away from the first filter cylinder 42, and one end of the discharge hopper 442 away from the third filter cylinder 44 extends out of the second filter tank 2.

Therefore, the third driving member 41 is driven, the third driving member 41 drives the conveying shaft 45 to rotate, the rotating conveying shaft 45 simultaneously drives the propeller blade 451 and the guide rod 461 to rotate, the guide rod 461 drives the bristles 463 on the material guide plate 462 to rotate along the inner side wall of the first filter cylinder 42, under the common pushing action of the material guide plate 462 and the bristles 463, small sundries falling into the first filter cylinder 42 are pushed to the upper part of the second gap 431, and then the small sundries fall into the second filter cylinder 43 from the second gap 431 under the action of self gravity. The propeller blade 451 rotating at this time transfers the smaller impurities in the second filter cartridge 43 to the third filter cartridge 44 and is finally discharged through the discharge hopper 442. Meanwhile, in the process that the screw blades 451 convey the small impurities, the conveying shaft 45 gradually increases in diameter, so that the volume between the screw blades 451 gradually decreases, the small impurities are also gradually compressed, solid and liquid in the small impurities are separated through compression, and the filtrate is discharged to the second filter tank 2 through the fine filter holes 441 in the third filter cylinder 44 and finally discharged from the water outlet 21.

The treatment process adopting the urban domestic sewage primary treatment equipment comprises the following steps:

the method comprises the following steps: domestic sewage is discharged into the first filtering tank 1 from the water inlet 11, the first connecting shaft 63 is driven to rotate by the first driving piece 61, so that the first steel wire rope 641 and the second steel wire rope 651 lift the cleaning bucket 5 to be close to two sides of the partition plate 12, at the moment, the cleaning bucket 5 is changed from the original tilting state to the flat state, and large impurities in the sewage are blocked on the partition plate 12 and fall into the cleaning bucket 5 for collection;

step two: the first driving part 61 is driven reversely, under the matching action of the first wire rope 641 and the second wire rope 651, the cleaning bucket 5 in a flat state tilts, the second driving part 85 is started, the second driving part 85 drives the screw rod 134 to rotate, so that the T-shaped block 813 drives the sliding seat 81 to move towards the direction close to the second driving part 85 until the driven gear 84 and the driving gear 66 are meshed with each other, the second driving part 85 stops running, the first driving part 61 is driven to drive the first wire rope 641, the second wire rope 651 and the third wire rope 831 to simultaneously drive the cleaning bucket 5 to stably lift along the extending direction of the channel steel 31, in the process that the cleaning bucket 5 gradually rises, the scraper 74 swings along the direction that the inner arc side of the arc-shaped plate 51 is close to the mounting frame 7, so that larger sundries in the cleaning bucket 5 are scraped into the collection box 75 to be collected, and the return spring 731 is in a compressed state, after the cleaning bucket 5 finishes cleaning, under the reverse driving action of the first driving part 61, the cleaning bucket 5 descends, and the return spring 731 returns the swinging arm 73, so that the swinging arm 73 returns to the original state;

step three: the sewage containing small impurities flows into the first filter cylinder 42 in the second filter tank 2, the sewage is finally discharged from the water outlet 21 of the second filter tank 2 through the fine filter holes 441, the small impurities are collected in the first filter cylinder 42, the third driving part 41 is driven, the third driving part 41 drives the conveying shaft 45 to rotate, the rotating conveying shaft 45 simultaneously drives the screw blade 451 and the guide rod 461 to rotate, the guide rod 461 drives the bristles 463 on the material guide plate 462 to rotate along the inner side wall of the first filter cylinder 42, and the small impurities falling into the first filter cylinder 42 are pushed into the second filter cylinder 43 under the combined pushing action of the material guide plate 462 and the bristles 463;

step four: the rotating propeller blade 451 transfers the smaller impurities in the second filter cylinder 43 to the third filter cylinder 44 and finally discharged through the discharge hopper 442, meanwhile, in the process that the propeller blade 451 transfers the smaller impurities, the volume between the propeller blades 451 is gradually reduced due to the gradually increased diameter of the conveying shaft 45, the smaller impurities are also gradually compressed, the solid and the liquid in the smaller impurities are separated through the compression, and the filtrate is discharged to the second filter tank 2 through the fine filter holes 441 on the third filter cylinder 44 and finally discharged from the water outlet 21.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides an urban domestic sewage preliminary treatment equipment which characterized in that: the device comprises a first filtering tank (1) and a second filtering tank (2) which are sequentially arranged along the water flow direction, wherein an inclined partition plate (12) is arranged between the first filtering tank (1) and the second filtering tank (2), a plurality of coarse filtering holes (121) are formed in the partition plate (12), a sundry filtering device (3) used for clearing large sundries in the sewage out of the first filtering tank (1) is arranged in the first filtering tank (1), a fine grid filtering device (4) used for clearing small sundries in the sewage out of the second filtering tank (2) is arranged in the second filtering tank (2), and a water outlet (21) of the second filtering tank (2) is communicated with sewage treatment equipment through a pipeline;

a support frame (13) is arranged at the opening of the first filtering tank (1), the support frame (13) comprises two vertical plates (132) vertically arranged at the opening of the first filtering tank (1) and a bearing plate (131) vertically fixed with one ends of the two vertical plates (132) far away from the first filtering tank (1), the sundries filtering device (3) comprises a driving mechanism (6) arranged on one side of the bearing plate (131) far away from the vertical plate (132), two channel steel (31) fixedly connected to one side of the partition plate (12) back to the second filtering tank (2) and a cleaning hopper (5) arranged between the two channel steel (31) and capable of sliding along the extending direction of the channel steel (31), wherein the openings of the two channel steel (31) are arranged oppositely, the inclined direction of the channel steel (31) is consistent with the inclined direction of the partition plate (12), the driving mechanism (6) is used for driving the cleaning bucket (5) to slide along the extending direction of the channel steel (31);

two one side that riser (132) are close to first filtering ponds (1) water inlet (11) is provided with mounting bracket (7), mounting bracket (7) are including respectively the level set up in two mounting panels (71) that two risers (132) are close to water inlet (11) one side of first filtering ponds (1) and set up between two mounting panels (71) and relative both ends respectively with two mounting panels (71) one side fixed connection's that are close to each other erection column (72), one side that erection column (72) are close to riser (132) is provided with two installation pieces (721), two one side that installation piece (721) are each other dorsad all articulates there is swing arm (73), two be provided with scraper blade (74) between swing arm (73), the relative both ends of scraper blade (74) keep away from its one end fixed connection of articulated department with two swing arm (73) respectively, scraper blade (74) and the interior bottom wall butt of clearance fill (5), a return spring (731) for adjusting the scraping radian of the scraper (74) is arranged between each swing arm (73) and the bearing plate (131), two opposite ends of the return spring (731) are fixedly connected with one sides, close to the vertical plate (132), of the swing arm (73) and the bearing plate (131) respectively, a collection box (75) with an upper opening is arranged on the second filtering tank (2), and the collection box (75) is located on one side, far away from the cleaning hopper (5), of the partition plate (12);

the cleaning bucket (5) comprises an arc-shaped plate (51) and sector plates (52) arranged on two opposite sides of the arc-shaped plate (51), wherein pulleys (521) are arranged on one sides, far away from the arc-shaped plate (51), of the two sector plates (52), the two pulleys (521) are connected with one sides, far away from the partition plate (12), of the two channel steels (31) in a sliding manner respectively, guide wheels (522) are further arranged on one sides, back to back, of the two sector plates (52), the same guide wheel (522) and the same pulley (521) on the sector plate (52) are respectively located at two opposite ends of the sector plate (52), the guide wheels (522) extend into the adjacent channel steels (31) and are connected with two inner side walls of the channel steels (31) in a sliding manner, two connecting arms (523) are hinged to one side, far away from the arc-shaped plate (51), of the two sector plates (52) are respectively hinged with the two connecting arms (523), and the same pulley (521) and the same connecting arm (523) on the same arc line, a guide block (5231) is arranged at one end, far away from the hinged position, of the connecting arm (523), the guide block (5231) is arranged on one side, back to the cleaning bucket (5), of the connecting arm (523), and the guide block (5231) extends into a channel steel (31) adjacent to the guide block (5231) and is connected with the channel steel (31) in a sliding mode;

the driving mechanism (6) comprises a first driving part (61) which is arranged on one side of the bearing plate (131) far away from the vertical plate (132), two supporting seats (62) which are fixedly connected to the bearing surface of the bearing plate (131) and are oppositely arranged, a first connecting shaft (63) which is arranged between the two supporting seats (62) and is fixedly connected with the output shaft of the first driving part (61) at the end part, a first rope winder (64) and a second rope winder (65) which are sleeved on the first connecting shaft (63) and are fixedly connected with the first connecting shaft (63), and a driving gear (66) which is fixedly connected to the first connecting shaft (63) and is positioned between the first rope winder (64) and the second rope winder (65), wherein the two opposite ends of the first connecting shaft (63) respectively penetrate through the two supporting seats (62) and are rotatably connected with the two supporting seats (62), one side of each fan-shaped plate (52) close to each other is provided with a connecting seat (524), a first steel wire rope (641) is wound on the first rope winder (64), a second steel wire rope (651) is wound on the second rope winder (65), one end, far away from the first rope winder (64), of the first steel wire rope (641) penetrates through the bearing plate (131) to extend to the connecting seat (524) corresponding to the position of the bearing plate and is buckled with the connecting seat (524) through the first lock catch (642), and one end, far away from the second rope winder (65), of the second steel wire rope (651) penetrates through the bearing plate (131) to extend to the connecting seat (524) corresponding to the position of the bearing plate and is buckled with the connecting seat (524) through the second lock catch (652);

one side of the bearing plate (131) far away from the vertical plate (132) is further provided with an adjusting device (8), the adjusting device (8) comprises a sliding seat (81) arranged on the bearing surface of the bearing plate (131), a second connecting shaft (82) arranged on the sliding seat (81), a third rope winder (83) fixedly connected onto the second connecting shaft (82), a driven gear (84) fixedly connected onto the second connecting shaft (82) and corresponding to the position of the driving gear (66), and a second driving piece (85) arranged on one side of the bearing plate (131) far away from the mounting rack (7) and used for driving the driven gear (84) to move towards the direction close to the driving gear (66), a third steel wire rope (831) is wound on the third rope winder (83), a strip hole (1311) for the third steel wire rope (831) to pass through is formed in the bearing plate (131), one end of the third rope winder (83) far away from the third rope winder (83) and the arc-shaped plate (51) far away from the partition plate (12) One side fixed connection of (2), the one side that the seat (81) that slides is close to loading board (131) is provided with T-shaped piece (813), set up on the bearing surface of loading board (131) with T-shaped piece (813) assorted T-slot (133), T-shaped piece (813) slide with T-slot (133) and be connected, be provided with lead screw (134) in the T-slot (133), the output shaft of second driving piece (85) extends to in the T-slot (133) with the tip fixed connection of lead screw (134), the one end that second driving piece (85) were kept away from in lead screw (134) passes T-shaped piece (813) and with T-shaped piece (813) threaded connection, the one end that second driving piece (85) were kept away from in lead screw (134) rotates with the inner end wall in T-slot (133) and is connected.

2. The municipal domestic sewage primary treatment apparatus according to claim 1, wherein: the rope winding device is characterized in that a locking assembly (86) is further arranged on the bearing plate (131), the locking assembly (86) comprises two lifting cylinders (861) which are oppositely arranged and vertically mounted on the bearing surface of the bearing plate (131), a lifting plate (862) fixedly connected with the telescopic ends of the two lifting cylinders (861), a brake block (863) which is arranged on one side, close to the bearing plate (131), of the lifting plate (862) and located between the two lifting cylinders (861), and a brake gear (864) which is arranged on the end portion of the second connecting shaft (82) and located between the two lifting cylinders (861), the brake gear (864) is located on one side, far away from the third rope winder (83), of the driven gear (84), and sharp teeth (865) matched with gear teeth of the brake gear (864) are arranged at one end, far away from the lifting plate (862), of the brake block (863).

3. The municipal domestic sewage primary treatment apparatus according to claim 1, wherein: the fine grid filtering device (4) is arranged on one side, far away from the first filtering tank (1), of the partition plate (12), the fine grid filtering device (4) comprises a third driving piece (41), a first filtering cylinder (42), a second filtering cylinder (43), a third filtering cylinder (44) and a conveying shaft (45) arranged in the second filtering cylinder (43) and the third filtering cylinder (44), a first notch (421) with an opening facing the partition plate (12) is formed in the outer peripheral surface of the first filtering cylinder (42), the second filtering cylinder (43) and the first filtering cylinder (42) are arranged in a coaxial mode, the second filtering cylinder (43) is inserted into the first filtering cylinder (42), a second notch (431) which is in the same direction as the first notch (421) is formed in the outer peripheral surface, extending to the first filtering cylinder (42), of the second filtering cylinder (43), and the third filtering cylinder (44) and the second filtering cylinder (43) are arranged in a coaxial mode, the radius of the third filter cylinder (44) is equal to that of the second filter cylinder (43), one end of the third filter cylinder (44) extends into the first filter cylinder (42) and is communicated with the second filter cylinder (43), the third driving member (41) is mounted on the end surface of the third filter cylinder (44) far away from the first filter cylinder (42), the conveying shaft (45) is coaxially arranged with the second filter cylinder (43) and the third filter cylinder (44), the output shaft of the third driving member (41) passes through the end surface of the third filter cylinder (44) far away from the first filter cylinder (42) and is fixedly connected with the end part of the conveying shaft (45), the outer peripheral surface of the conveying shaft (45) is provided with a spiral blade (451), one end of the conveying shaft (45) far away from the third driving member (41) is provided with a guide assembly (46), and the diameter of the conveying shaft (45) is gradually increased from the second filter cylinder (43) to the third filter cylinder (44), the outer peripheral surfaces of the third filter cylinder (44) and the first filter cylinder (42) are respectively provided with a fine filter hole (441), the aperture of the fine filter hole (441) is smaller than that of the coarse filter hole (121), and the outer peripheral surface of the third filter cylinder (44) is provided with a discharge hopper (442).

4. The municipal domestic sewage primary treatment apparatus according to claim 3, wherein: the guide assembly (46) comprises a guide rod (461) arranged on the peripheral side of one end, far away from the third driving part (41), of the conveying shaft (45), a material guide plate (462) vertically fixed to one end, far away from the conveying shaft (45), of the guide rod (461), and bristles (463) uniformly and densely distributed on one side, back to the second filter cartridge (43), of the material guide plate (462), wherein one end, far away from the material guide plate (462), of each bristle (463) is abutted to the inner side wall of the first filter cartridge (42).

5. A treatment process using the primary treatment equipment for municipal domestic sewage according to any one of claims 1 to 4, characterized in that: the method comprises the following steps:

the method comprises the following steps: domestic sewage is discharged into a first filtering tank (1) from a water inlet (11), a first connecting shaft (63) is driven to rotate through a first driving piece (61), so that a first steel wire rope (641) and a second steel wire rope (651) lift a cleaning bucket (5) to be close to two sides of a partition plate (12), at the moment, the cleaning bucket (5) is changed from an original tilted state into a flat state, and large impurities in the sewage are blocked on the partition plate (12) and fall into the cleaning bucket (5) for collection;

step two: the first driving part (61) is driven reversely, under the matching action of the first steel wire rope (641) and the second steel wire rope (651), the cleaning bucket (5) in a flat state is tilted, the second driving part (85) is started, the second driving part (85) drives the screw rod (134) to rotate, so that the T-shaped block (813) drives the sliding seat (81) to move towards the direction close to the second driving part (85) until the driven gear (84) and the driving gear (66) are meshed with each other, the second driving part (85) stops running, the first driving part (61) is driven to drive the first steel wire rope (641), the second steel wire rope (651) and the third steel wire rope (831) to simultaneously drive the cleaning bucket (5) to stably lift along the extending direction of the channel steel (31), and in the process that the cleaning bucket (5) gradually rises, the scraper (74) swings towards the direction close to the mounting rack (7) along the inner arc side of the arc-shaped plate (51), therefore, larger sundries in the cleaning bucket (5) are scraped into the collecting box (75) to be collected, the return spring (731) is in a compressed state, after the cleaning bucket (5) is cleaned, the cleaning bucket (5) descends under the reverse driving action of the first driving piece (61), and the return spring (731) resets the swing arm (73), so that the swing arm (73) is restored to the initial state;

step three: sewage containing small impurities flows into a first filter cylinder (42) in a second filter tank (2), the sewage is finally discharged from a water outlet (21) of the second filter tank (2) through a fine filter hole (441), the small impurities are collected in the first filter cylinder (42) to drive a third driving piece (41), the third driving piece (41) drives a conveying shaft (45) to rotate, the rotating conveying shaft (45) simultaneously drives a screw blade (451) and a guide rod (461) to rotate, the guide rod (461) drives bristles (463) on a material guide plate (462) to rotate along the inner side wall of the first filter cylinder (42), and the small impurities falling into the first filter cylinder (42) are pushed into a second filter cylinder (43) under the pushing action of the material guide plate (462) and the bristles (463);

step four: the rotating propeller blade (451) conveys the smaller impurities in the second filter cylinder (43) to the third filter cylinder (44) and finally discharges the smaller impurities through the discharge hopper (442), meanwhile, in the process that the propeller blade (451) conveys the smaller impurities, the volume between the propeller blades (451) is gradually reduced due to the fact that the diameter of the conveying shaft (45) is gradually increased, the smaller impurities are also gradually compressed, solid and liquid in the smaller impurities are separated through compression, and filtrate is discharged to the second filter tank (2) through the fine filter holes (441) in the third filter cylinder (44) and finally discharged from the water outlet (21).