CN211706002U

CN211706002U - Chain tensioning device and sedimentation system for secondary sedimentation tank

Info

Publication number: CN211706002U
Application number: CN201921136072.3U
Authority: CN
Inventors: 孙述
Original assignee: Shenzhen Zhengda Environment Engineering Industrial Co ltd
Current assignee: Shenzhen Zhengda Environment Engineering Industrial Co ltd
Priority date: 2019-07-18
Filing date: 2019-07-18
Publication date: 2020-10-20
Anticipated expiration: 2029-07-18

Abstract

The embodiment of the application belongs to the field of sewage treatment, and relates to a chain tensioning device for a secondary sedimentation tank, which comprises a mud scraping assembly and a tensioning assembly, wherein the mud scraping assembly comprises a chain and a rolling wheel, the tensioning assembly comprises a driving piece, a traction piece, a sliding groove and a driven shaft, the driving piece is arranged on the matched secondary sedimentation tank, the sliding groove is fixedly arranged on the matched secondary sedimentation tank, one end of the driven shaft is slidably arranged on the sliding groove, and the other end of the driven shaft is fixed with the rolling wheel; the driving piece drives the traction piece to drive the driven wheel and the winding wheel to slide on the sliding groove. The application also discloses a sedimentation system. The application provides a technical scheme can be through setting up the driven shaft on the winding up pulley to the one end of driven shaft slides and sets up on the spout, pulls the piece through the drive assembly drive, and the pulling driven shaft slides on the spout, thereby drives winding up pulley pulling chain motion and stretches the chain straight, makes the chain keep the tensioning so that the chain drives the slide and scrapes the mud operation.

Description

Chain tensioning device and sedimentation system for secondary sedimentation tank

Technical Field

The application relates to the field of sewage treatment, in particular to a chain tensioning device and a sedimentation system for a secondary sedimentation tank.

Background

The secondary sedimentation tank is an important component of an activated sludge system and mainly has the functions of separating sludge, clarifying mixed liquor, concentrating and refluxing activated sludge. The working effect can directly influence the effluent quality and the return sludge concentration of the activated sludge system. Need subside mud at the in-process that separates mud, later pass through the pipeline with the mud that subsides and absorb and take out from the water district, take out from the in-process of mud, need concentrate on near the entry of mud suction pipe with mud, an embodiment is near the entry of mud suction pipe is scraped with mud through the mud scraping plate, in the middle of the process of the mud of scraping, the chain that drives the mud scraping plate is pulled the deformation because of the weight of mud easily, the adjustment need often be taken out, thereby the work efficiency of the mud of influence row.

SUMMERY OF THE UTILITY MODEL

The technical problem that this application embodiment will solve provides the device that can assist the chain tensioning constantly of driving the mud scraper constantly.

In order to solve the above technical problem, an embodiment of the present application provides a rectangular high-load sedimentation system, which adopts the following technical scheme:

a chain tensioning device for a secondary sedimentation tank is used for adjusting the chain tension of a mud scraping assembly, the mud scraping assembly comprises a winding wheel and a tensioning assembly, the tensioning assembly comprises a pulling piece, a traction piece, a sliding groove and a driven shaft, the pulling piece is arranged on the matched secondary sedimentation tank, the sliding groove is fixedly arranged on the matched secondary sedimentation tank, one end of the driven shaft is arranged on the sliding groove in a sliding mode, and the other end of the driven shaft is fixed with the winding wheel; the pulling part drives the pulling part to drive the driven wheel and the winding wheel to slide on the sliding groove, and the winding wheel is in driving fit with the chain.

Furthermore, the pulling piece is a screw rod, and the screw rod is in threaded connection with a support arranged on the matched secondary sedimentation tank.

Further, the tensioning assembly further comprises at least one set of fixed pulleys, the traction piece is set to be a traction rope, and the fixed pulleys are arranged on the side wall of the matched secondary sedimentation tank and are in rolling fit with the traction rope.

Furthermore, one end of the sliding groove is provided with a limiting clamp so as to limit the moving range of the driven shaft.

Furthermore, the mud scraping assembly also comprises a driving part and a scraping plate, at least two chains are arranged, and the chains are sleeved on the plurality of winding wheels; the driving piece drives the plurality of winding wheels to drive the corresponding chains to move, and the moving direction of the chains is vertical to the flowing direction of the sewage and opposite to the mud suction pipe; the scraper is fixed with the at least two groups of chains and is driven by the at least two groups of chains to scrape sludge so as to be matched with the sludge suction pipe to suck the sludge.

Furthermore, the plurality of winding wheels are arranged as driving wheels, the plurality of winding wheels are arranged as driven wheels, the driving wheels are in driving connection with the chains, and the chains are driven to rotate by the driving piece; the driven wheel is matched with the driving wheel to support the chain.

Further, scrape mud subassembly still includes the fixed plate, the scraper blade passes through fixed plate and chain fixed connection, the both ends of fixed plate are fixed on the adjacent connection position of chain.

In order to solve the technical problem, the application also discloses a sedimentation system, which comprises the tensioning device for the chain of the secondary sedimentation tank. Still include two heavy ponds, subassembly, play ditch, row's mud subassembly of intaking, the subassembly of intaking is including setting up the intake canal at two heavy pond side tops, the bottom of intake canal is provided with a plurality of water inlets, it sets up to go out the ditch the intake canal side, row's mud subassembly is including the suction pipe, the mud pipe and the mud groove that connect gradually, the suction pipe sets up the bottom in two heavy ponds, the mud groove sets up the offside at the intake canal.

Furthermore, the water inlet assembly further comprises a water inlet apron board, the water inlet apron board is arranged at the bottom of the water inlet channel, and the water inlet apron board is arranged on the inner sides of the water inlets so as to guide water flow to vertically move downwards through the water inlets.

Further, the water inlet assembly further comprises a water inlet baffle plate, the water inlet baffle plate is arranged at the bottom of the water inlet channel, and the water inlet baffle plate is arranged between the water inlet apron plate and the side wall of the secondary sedimentation tank and is opposite to the water inlet.

Compared with the prior art, the embodiment of the application mainly has the following beneficial effects: through setting up the driven shaft on the winding up pulley to the one end of driven shaft slides and sets up on the spout, pulls the piece through the drive assembly drive, and the pulling driven shaft slides on the spout, thereby drives the winding up pulley pulling chain motion and stretches the chain straight, makes the chain keep the tensioning so that the chain drives the slide and scrapes the mud operation.

Drawings

In order to illustrate the solution of the present application more clearly, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and that other drawings can be obtained by those skilled in the art without inventive effort.

Fig. 1 is the structure schematic diagram of the chain tensioning mechanism of the present invention.

Fig. 2 is a schematic structural diagram of the mud scraping assembly.

Fig. 3 is a schematic view of the structure of the tension assembly.

Fig. 4 is a side view of fig. 3.

Fig. 5 is a schematic view of the structure of the squeegee.

Fig. 6 is a schematic structural diagram of a settling system.

Fig. 7 is a top view of fig. 6.

Fig. 8 is a schematic view of the water flow direction.

Fig. 9 is a schematic view of the exhaust valve structure.

Reference numerals:

1-secondary sedimentation tank, 2-mud scraping component, 21-driving component, 22-scraper, 23-chain, 24-rolling wheel, 25-fixing plate, 3-tensioning component, 31-pulling component, 32-pulling component, 33-sliding groove, 34-driven shaft, 35-limiting clamp, 4-mud discharging component, 41-mud sucking pipe, 42-mud discharging pipe, 43-mud discharging groove, 44-sleeve valve, 5-exhaust valve, 51-outer shell, 52-inner shell, 53-sealing rubber sleeve, 54-exhaust pipe, 6-water inlet component, 61-water inlet channel, 62-water inlet, 63-water inlet apron board, 64-water inlet baffle, 7-water outlet channel, 8-skimmer.

Detailed Description

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions. The terms "first," "second," and the like in the description and claims of this application or in the above-described drawings are used for distinguishing between different objects and not for describing a particular order.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

Embodiment I of chain tensioning device for secondary sedimentation tank 1

Referring to fig. 1 to 5, the chain tensioning device for the secondary sedimentation tank 1 of the present application comprises a tensioning assembly 3 and a mud scraping assembly 2, wherein the mud scraping assembly 2 comprises a chain 23 and a winding wheel 24, the tensioning assembly 3 comprises a pulling member 31, a traction member 32, a sliding chute 33 and a driven shaft 34

The pulling piece 31 is arranged on the secondary sedimentation tank 1, the sliding chute 33 is fixedly arranged on the secondary sedimentation tank 1, one end of the driven shaft 34 is arranged on the sliding chute 33 in a sliding manner, and the other end of the driven shaft is fixed with the winding wheel 24; the pulling member 31 drives the pulling member 32 to drive the driven wheel and the winding wheel 24 to slide on the sliding groove 33. This scheme is convenient for adjust the tensioning degree of chain 23, prevents regularly taking out chain 23 and adjusts.

Further, the pulling member 31 is a screw rod, and the screw rod is in threaded connection with a support arranged on the matched secondary sedimentation tank 1. This scheme can be stable drive pull 32 and pull driven shaft 34 for the tensioning of zip fastener is more smooth and easy.

Furthermore, the tensioning assembly 3 further comprises at least one set of fixed pulleys, the traction member 32 is provided as a traction rope, and the fixed pulleys are provided on the side wall of the matched secondary sedimentation tank 1 and are in rolling fit with the traction rope. This scheme is favorable to drawing 32 and the setting of pulling 31, can be according to the actual structure of secondary sedimentation tank 1, and reasonable setting draws 32 and pulls 31.

Further, one end of the sliding groove 33 is provided with a limit clip 35 to limit the moving range of the driven shaft 34. This solution is advantageous in preventing the driven shaft 34 from being pulled out of the chute 33.

The driven shaft 34 is arranged in the sliding groove 33 and is in sliding fit with the sliding groove 33, the traction piece 32 drives the driven shaft 34 to slide in the sliding groove 33, in one embodiment, the traction piece 32 is a steel wire rope capable of being wound and released, one end of the steel wire rope is fixed with the screw, the other end of the steel wire rope is fixedly connected with the driven shaft 34, the driven shaft 34 is fixedly connected with the winding wheel 24, and the screw in threaded connection with the secondary sedimentation tank 1 drives the steel wire rope to drive the driven shaft 34 to move in the sliding groove 33 so as to drive the winding wheel 24 to move.

Drive the mud scraper mud at chain 23, after having worked a period, the wearing and tearing dislocation and become the pine appear in chain 23, just can use after needing to adjust, generally shut down the device to fishing out chain 23 and adjusting, the efficiency of sewage treatment is greatly influenced in too frequent adjustment. This scheme is through setting up tensioning assembly 3, through the motion of steel wire pulling driven shaft 34 drive reel 24, with chain 23 tensioning to receive the not hard up influence of chain 23 in the middle of avoiding scraper blade 22 working process, and need not frequent shutdown equipment, with the holistic work efficiency of guarantee.

Further, the rectangular high-load settling system further comprises a mud scraping assembly 2, and the mud scraping assembly 2 comprises a driving part, a scraper 22, a chain 23 and a winding wheel 24.

In the present embodiment, the mud scraping assembly 2 comprises at least one set of scraper 22, two sets of chains 23 are provided, and eight sets of winding wheels 24 are provided, wherein each four sets of winding wheels 24 correspond to one chain 23.

Two chains 23 are respectively arranged on a plane vertical to sewage water flow, four groups of winding wheels 24 support one chain 23 on four end points, and one part of the chain 23 is arranged at the bottom of the secondary sedimentation tank 1. The two ends of the scraper 22 are respectively arranged on the chains 23, and under the driving of the winding wheel 24, the chains 23 drive the scraper 22 to move in the vertical direction of the sewage flow, and scrape the sludge settled at the bottom of the secondary sedimentation tank 1, so that the sludge is gathered near the sludge suction pipe 41 and is sucked into the sludge suction pipe 41 through the sludge suction port. Two sets of chains 23 drive a plurality of scrapers 22 to rotate in a circulating manner, the density of the scrapers 22 is preset according to the deposition amount of sludge so as to adapt to the requirement of sludge recovery, and the driving piece is arranged to comprise a motor and a transmission belt.

Further, a set of winding wheels 24 corresponding to each chain 23 lock is set as a driving wheel, the other winding wheels 24 are set as driven wheels, the driving wheel is in driving connection with the chains 23, and the chains 23 are driven to rotate by the driving piece; the driven wheel cooperates with the driving wheel to support the chain 23. The scheme simplifies the structural complexity of the mud scraping component 2 and is convenient to maintain

Further, the mud scraping assembly 2 further comprises a fixing plate 25, the scraper 22 is fixedly connected with the chain 23 through the fixing plate 25, and two ends of the fixing plate 25 are fixed on adjacent connecting positions of the chain 23. This arrangement is advantageous in that the scraper 22 can smoothly run at the turning of the chain 23 by keeping the fixed plate 25 and the chain 23 in the same motion.

Embodiment one of a sedimentation system of the present application

Referring to fig. 1 to 6, the present application relates to a rectangular high-load settling system, including the chain tensioner, further including: the secondary sedimentation tank 1, the water inlet assembly 6, the water outlet channel 7 and the sludge discharge assembly 4. The water inlet assembly 6 comprises a water inlet channel 61, a water inlet 62, a water inlet apron 63 and a water inlet baffle plate 64.

The horizontal cross section of the secondary sedimentation tank 1 is set to be rectangular, the water inlet channel 61 is arranged at the top of the side of the secondary sedimentation tank 1, the water outlet channel 7 is arranged at the side of the water inlet channel 61, and the mud discharging component 4 is arranged at the bottom of the secondary sedimentation tank 1 and the opposite side of the water inlet channel 61. The bottom of inlet channel 61 is provided with a plurality of water inlets 62, arranges mud subassembly 4 including suction pipe 41, mud pipe 42 and the mud groove 43 that connects gradually, and suction pipe 41 sets up in the bottom of two heavy ponds 1, and mud groove 43 sets up the offside at inlet channel 61, and mud pipe 42 sets up intercommunication suction pipe 41 and mud groove 43 on the lateral wall of two heavy ponds 1.

Wherein, pending sewage is carried in the middle of the intake pond through external water supply pipeline to water inlet 62 through setting up in the bottom of intake channel 61 flows into two heavy ponds 1 in the middle of, because intake channel 61 sets up at two heavy pond 1's top, so the initial velocity of rivers has been guaranteed to the drop between intake channel 61 and two heavy pond 1 bottoms, under inertial effect, sewage is in the bottom of two heavy ponds 1, to the side relative with intake channel 61 flow, in the middle of the flow process, silt that exists in the water is in two heavy pond 1 bottom sedimentation separation. When the water flows to the side wall on the opposite side of the water inlet channel 61, the water flows upwards along the side wall and turns back in the opposite direction. The unit density of the filtered water body is small, the filtered water body is layered with the water body with silt, and the filtered water body can flow back to one side where the water inlet channel 61 is located and flows into the water outlet channel 7 through the weir plate. The water in the secondary sedimentation tank 1 is divided into an upper layer and a lower layer, the lower layer of water is turbid and flows to the first direction, silt is settled simultaneously, the upper layer of water is clear, and flows to the second direction opposite to the first direction so as to flow into the water outlet channel 7 through the weir plate and flow out to finish the sedimentation process. The hydraulic conditions in the whole secondary sedimentation tank 1 are driven by the kinetic energy generated by the drop between the water inlet channel 61 and the bottom of the secondary sedimentation tank 1. Sewage flows to the other side through one side of the bottom of the rectangular secondary sedimentation tank 1, effectively subsides in the middle of the rapid horizontal movement process of water flow, and the length of the subsided interval can be guaranteed so as to guarantee enough long sedimentation time. Then under the guide of the side wall, the sewage flows out of the water outlet channel 7 through layered water flows, and compared with the existing sedimentation mode, a large amount of sewage can be treated at the same time. The sludge obtained by sedimentation is quickly pumped out to the sludge discharge groove 43 under the pushing of the water pressure through the siphon action generated between the sludge discharge pipe 42 and the sludge suction pipe 41, the separation efficiency is high, the sludge in the sewage can be efficiently treated, and the rapid treatment of the sewage is promoted.

Wherein the cross sections of the inlet channel 61 and the outlet channel 7 are set according to the water flow at the cross section. Specifically, the cross-sectional area of the front end of the water inlet channel 61 is large so as to adapt to high water inlet flow; the cross-sectional area that the inlet channel 61 rear end set up is little to be adapted to lower sewage flow. The water yield is big at the inlet channel 61 front end department, and the flow is great, and in the middle of the in-process that flows in the inlet channel 61, continuously go out water through a plurality of water inlets 62, the flow reduces correspondingly, and the cross sectional area who sets up at the inlet channel 61 rear end is little to the flow that adapts to reduces. The water pressure of the water inlet 62 at the front end and the rear end of the water inlet channel 61 is kept consistent, and the water inlet 62 distributed on the whole water inlet channel 61 can uniformly discharge water on the premise that the specifications of the water inlet 62 are the same. Similarly, the rear end of the water outlet channel 7 is large in cross-sectional area, and the rear end is small in cross-sectional area, so that the water outlet channel 7 can be guaranteed to be uniform in water drawing efficiency through the weir plate, and the phenomenon that the water quantity at the rear end of the water outlet channel 7 is too large and the water drawing speed is slow to cause siltation is prevented. Wherein the flow direction of the water flow is from the front end to the rear end. Alternatively, by reasonably setting the distribution of the water inlets 62 or the specification of the water inlets 62, the water inlets 62 with lower density or smaller caliber are arranged at the front end of the water inlet channel 61, and the water inlets 62 with higher density and larger caliber are arranged at the rear end of the water inlet channel 61 to ensure that the water inlet channel 61 can uniformly feed water.

Further, a water inlet skirt board 63 and a water inlet baffle board 64 are arranged in the secondary sedimentation tank 1, the water inlet skirt board 63 is arranged at the bottom of the water inlet tank and is arranged at the inner side of the water inlet 62, and the water inlet baffle board 64 is arranged between the water inlet skirt board 63 and the side wall of the secondary sedimentation tank 1 and is opposite to the water inlet 62.

The skirtboard 63 of intaking sets up between water inlet 62 and the basin of giving out water, and the vertical downward motion of guide sewage blocks the sewage that gets into secondary sedimentation tank 1 through the board of intaking and handles back clarified water and mix, and the while is through the guide downflow to sewage, can guarantee the velocity of flow of sewage, guarantees to export sufficient energy downwards, and the sewage of the secondary sedimentation tank 1 of drive flows according to setting for the route.

The inlet baffle 64 is opposite to the water inlet 62, and the fall between the inlet baffle 64 and the water inlet tank causes sewage to have a certain initial velocity at the inlet baffle 64, if the sewage continuously impacts the bottom of the secondary sedimentation tank 1 with higher speed, the hydrological environment in the secondary sedimentation tank 1 is influenced, and sediment settled and collected at the bottom of the tank flies up to seriously influence the sedimentation effect of the secondary sedimentation tank 1. The arrangement of the water inlet baffle plate 64 can effectively prevent the sewage from flowing too fast, the resulting sedimentation efficiency is reduced, and the arrangement of the angle and the height of the water inlet baffle plate 64 is also favorable for guiding the sewage to flow towards the preset direction.

Further, at least one group of inclined planes opposite to the water inlet groove or the sludge discharge groove 43 are arranged on the bottom edge of the secondary sedimentation tank 1.

In the middle of this embodiment, the inclined plane is provided with two sets ofly, and a set of inclined plane setting is relative with the intake chamber in the below of intake chamber, and the inclined plane suits with whole intake chamber, and among the middle of the water inlet process, sewage moves downwards, strikes the inclined plane after, moves to the below that inclines under the guide on inclined plane, later under the guide of two heavy pond 1 bottoms surfaces, moves to the lateral wall direction of intake chamber offside. Another a set of inclined plane sets up in a mud groove below, and the water after the guide subsides moves to oblique top, and this scheme can prevent effectively that the vortex from appearing in the middle of the flow process of sewage in the base angle department of two heavy ponds 1, influences the hydrology environment in two heavy ponds 1, influences and subsides efficiency.

Further, the mud suction pipe 41 comprises a pipe body and a mud suction hole arranged on the pipe body, a sleeve valve 44 is arranged at the top end of the mud discharge pipe 42, the bottom end of the mud discharge pipe 42 is communicated with the pipe body of the mud suction pipe 41, and the top end of the mud discharge pipe 42 is arranged above the mud discharge groove 43.

Suction pipe 41 is in the bottom that two sink ponds 1, bear the water pressure that has the capacity, sludge discharge pipe 42 discharge end sets up the intake chamber that highly is less than two sink ponds 1, take out through the mud of siphon principle with two sink ponds 1 bottoms, carry in the sludge discharge groove 43, at the in-process of mud discharging, suction pipe 41 is in the bottom of supporting two sink ponds 1, bear a certain amount of water pressure, be favorable to mud to push into in the middle of the sludge discharge pipe 42 through water pressure, and pump out to the top through sludge discharge pipe 42, until mud flows into in the middle of the sludge discharge groove 43, this scheme can be stable continuous takes out the mud of bottom of the pool, sludge discharging is efficient. Wherein the cross section of the sludge discharge groove 43 is arranged to be gradually enlarged from the rear end to the front end, and the sludge moves from the front end to the rear end to be discharged out of the sludge discharge groove 43. The sludge discharge pipes 42 are provided with a plurality of groups, sludge is gathered at the front end of the sludge discharge groove 43, and the cross section of the sludge discharge groove 43 is gradually enlarged, so that the sludge can smoothly pass through the sludge, and the sludge deposition is prevented.

Further, the mud discharging device for the secondary sedimentation tank 1 further comprises a sleeve valve 44, and the sleeve valve 44 is arranged at the upper part of the mud discharging pipe 42.

The sludge is moved upward through the sludge discharge pipe 42 to reach the sludge discharge groove 43 and is discharged through the sludge discharge groove 43. The sleeve valve 44 adjusts the opening size of the sludge discharge pipe 42, the sleeve valve 44 moves upwards, the opening of the sludge discharge pipe 42 is enlarged, and the sludge suction effect is enhanced; the sleeve valve 44 moves downward and the mud pipe 42 decreases in opening, reducing the effect of sucking mud outward. The mud output through the sleeve valve 44 adjustment mud to the mud volume that subsides in the adaptation sewage, when sewage is comparatively clean, then adjustment sleeve valve 44 reduces the mud output of mud pipe 42, and when sewage is comparatively muddy, then adjustment sleeve valve 44 increases the mud output of mud pipe 42, so can prevent that mud pipe 42 opening is too big, causes to admit air, perhaps mud pipe 42 opening is too little goes out the mud speed splash, influences mud discharging efficiency.

Further, the mud discharging device for the secondary sedimentation tank 1 further comprises an exhaust valve 5, wherein the exhaust valve 5 comprises an outer shell 51, an inner shell 52, a sealing rubber sleeve 53 and an exhaust pipe 54.

The inner shell 52 is connected with the sludge suction pipe 41 through a filter screen, when the sludge suction pipe 41 sucks sludge, gas and sewage in the sludge flow into the inner shell 52, the outer shell 51 is sleeved outside the inner shell 52 and is in clearance fit with the inner shell 52, the inner shell 52 is communicated with the outer shell 51 through an opening, the gas permeating into the inner shell 52 is transmitted into the outer shell 51 through the opening, and liquid circulates in the inner shell 52 and the sludge suction pipe 41 due to the factors of gravity and external pressure; the exhaust pipe 54 is arranged at one end of the outer shell 51, the sealing rubber sleeve 53 is arranged between the exhaust pipe 54 and the inner shell 52, the inner shell 52 is pushed by the pressure in the sludge suction pipe 41 to extrude the sealing rubber sleeve 53 under the condition that the sludge suction pipe 41 sucks sludge, so that the sealing rubber sleeve 53 blocks the opening, the outer shell 51 is communicated with the outside through the one-way valve arranged on the sealing rubber sleeve 53, and the gas in the outer shell 51 is exhausted to the outside through the one-way valve. This solution can ensure that the mud pipe 42 is always in a vacuum state.

Further, still include skimmer 8, skimmer 8 sets up at the top of secondary sedimentation tank 1 to both ends and the lateral wall sliding connection of secondary sedimentation tank 1, in order to slide skimming the froth that floats at the sewage top.

The skimming tool 8 is arranged on the chain 23 in a staggered way with the scraping plates 22 or is provided with a chute 33 adapting to the height of the sewage water surface to drive the skimming tool 8 to move, and the scheme can remove the floating foam and the floating slag floating on the top of the treated water, so that the treated water collected from the water outlet groove is clearer. It is to be understood that the above-described embodiments are merely illustrative of some, but not restrictive, of the broad invention, and that the appended drawings illustrate preferred embodiments of the invention and do not limit the scope of the invention. This application is capable of embodiments in many different forms and is provided for the purpose of enabling a thorough understanding of the disclosure of the application. Although the present application has been described in detail with reference to the foregoing embodiments, it will be apparent to one skilled in the art that the present application may be practiced without modification or with equivalents of some of the features described in the foregoing embodiments. All equivalent structures made by using the contents of the specification and the drawings of the present application are directly or indirectly applied to other related technical fields and are within the protection scope of the present application.

Claims

1. The utility model provides a two sink chain overspeed device tensioner for pond for adjust the chain tension of scraping mud subassembly, it includes the reel to scrape mud subassembly, its characterized in that: the tensioning device comprises a tensioning assembly, wherein the tensioning assembly comprises a pulling piece, a traction piece, a sliding chute and a driven shaft, the pulling piece is arranged on a matched secondary sedimentation tank, the sliding chute is fixedly arranged on the matched secondary sedimentation tank, one end of the driven shaft is slidably arranged on the sliding chute, and the other end of the driven shaft is fixed with a winding wheel; the pulling part drives the pulling part to drive the driven wheel and the winding wheel to slide on the sliding groove, and the winding wheel is in driving fit with the chain.

2. The chain tensioner for a secondary sedimentation tank according to claim 1, wherein: the pulling piece is a screw rod, and the screw rod is in threaded connection with a support arranged on the matched secondary sedimentation tank.

3. The chain tensioner for a secondary sedimentation tank according to claim 2, wherein: the tensioning assembly further comprises at least one group of fixed pulleys, the traction piece is set to be a traction rope, and the fixed pulleys are arranged on the side wall of the matched secondary sedimentation tank and are in rolling fit with the traction rope.

4. The chain tensioner for a secondary sedimentation tank according to claim 3, wherein: one end of the sliding groove is provided with a limiting clamp to limit the moving range of the driven shaft.

5. The chain tensioner for a secondary sedimentation tank according to any one of claims 1 to 4, wherein: the mud scraping assembly further comprises a driving piece and a scraping plate, at least two chains are arranged, and the chains are sleeved on the plurality of winding wheels; the driving piece drives the plurality of winding wheels to drive the corresponding chains to move, and the moving direction of the chains is vertical to the flowing direction of the sewage and opposite to the mud suction pipe; the scraper is fixed with the at least two groups of chains and is driven by the at least two groups of chains to scrape sludge so as to be matched with the sludge suction pipe to suck the sludge.

6. The chain tensioner for a secondary sedimentation tank according to claim 5, wherein: the plurality of winding wheels are arranged as driving wheels, the plurality of winding wheels are arranged as driven wheels, the driving wheels are in driving connection with the chains, and the chains are driven to rotate by the driving pieces; the driven wheel is matched with the driving wheel to support the chain.

7. The chain tensioner for a secondary sedimentation tank according to claim 6, wherein: the mud scraping assembly further comprises a fixing plate, the scraping plate is fixedly connected with the chain through the fixing plate, and two ends of the fixing plate are fixed to adjacent connecting positions of the chain.

8. A sedimentation system, characterized by: the chain tensioner for the secondary sedimentation tank comprises the secondary sedimentation tank as claimed in any one of claims 1 to 7, and further comprises a secondary sedimentation tank, a water inlet assembly, a water outlet channel and a mud discharging assembly, wherein the water inlet assembly comprises a water inlet channel arranged at the top of the side edge of the secondary sedimentation tank, a plurality of water inlets are formed in the bottom of the water inlet channel, the water outlet channel is arranged beside the water inlet channel, the mud discharging assembly comprises a mud suction pipe, a mud discharging pipe and a mud discharging groove which are sequentially connected, the mud suction pipe is arranged at the bottom of the secondary sedimentation tank, and the mud discharging groove is arranged at the opposite side of the water inlet channel.

9. A sedimentation system according to claim 8, wherein: the water inlet assembly further comprises a water inlet apron board, the water inlet apron board is arranged at the bottom of the water inlet channel, and the water inlet apron board is arranged on the inner sides of the water inlets so as to guide water flow to vertically move downwards through the water inlets.

10. A sedimentation system according to claim 8, wherein: the water inlet assembly further comprises a water inlet baffle plate, the water inlet baffle plate is arranged at the bottom of the water inlet channel, and the water inlet baffle plate is arranged between the water inlet apron plate and the side wall of the secondary sedimentation tank and is opposite to the water inlet.