CN110655216B - Sewage treatment device for urban river - Google Patents

Abstract

The invention relates to the field of sewage treatment, and discloses a sewage treatment device for an urban river, which comprises a sedimentation tank provided with a sludge discharge pipe, wherein a sludge discharge mechanism is arranged in the sedimentation tank, the sludge discharge mechanism comprises a sludge storage pipe and two sludge guide plates which are transversely arranged, the upper side wall of the sludge storage pipe is provided with a sludge inlet which extends along the length direction of the sludge storage pipe and has an upward opening, the lower ends of the two sludge guide plates are respectively fixed on two sides of the sludge inlet, a sludge blocking pipe which is coaxial with the sludge storage pipe and can rotate is inserted in the side wall of the sludge storage pipe, and the side wall of the sludge blocking pipe is provided with a sludge passing opening which can be matched with the sludge inlet; the mud discharging mechanism further comprises a mud scraping plate which is arranged in the mud storage pipe and can move along the length direction of the mud storage pipe, and a pull rod which can stretch out the mud discharging pipe is arranged on the mud scraping plate. The lower part of the sedimentation tank is designed into a sludge sedimentation and sludge discharge structure with a special structure, so that the sludge at the lower part of the sedimentation tank can be discharged more comprehensively, and a more ideal sludge discharge effect is achieved.

Description

Sewage treatment device for urban river

Technical Field

The invention relates to the field of sewage treatment, in particular to a sewage treatment device.

Background

The sewage treatment process is an effective process method for various economic, reasonable, scientific and industrial waste water of urban domestic sewage. Sewage treatment is widely applied to various fields such as buildings, agriculture, traffic, energy, petrifaction, environmental protection, urban landscape, medical treatment, catering and the like. The urban sewage treatment process is preferably determined after comprehensive technological and economic comparison according to the treatment scale, the water quality characteristics, the environmental function of the receiving water body and the local actual conditions and requirements.

The general sewage treatment process comprises the steps of water inlet, aeration, sedimentation, water drainage and the like, wherein the sedimentation step is generally carried out by adopting a sedimentation tank, the sludge-water separation is mainly realized, and the separated water and sludge are recycled. Present sedimentation tank generally all utilizes the bottom to collect mud to the mud pipe that the utilization set up in the sedimentation tank bottom discharges, and the mud-water is difficult to the separation in the actual mud discharging process, and mud easily gathers at the mud discharging opening but is difficult to discharge the mud discharging opening in time, thereby leads to the mud discharging effect unsatisfactory, is difficult to comparatively comprehensive discharge.

Disclosure of Invention

The invention provides a sewage treatment device for an urban river, aiming at the problems in the sewage treatment process in the prior art.

In order to solve the technical problems, the invention is solved by the following technical scheme:

a sewage treatment device for an urban river comprises a sedimentation tank provided with a sludge discharge pipe, wherein a water inlet pipe is arranged at the upper part of the sedimentation tank, a sludge discharge mechanism connected with the sludge discharge pipe is arranged in the sedimentation tank, the sludge discharge mechanism comprises a sludge storage pipe arranged transversely and two sludge guide plates arranged obliquely downwards, one end of the sludge storage pipe is fixed on the inner side wall of the sedimentation tank, the other end of the sludge storage pipe is connected with the sludge discharge pipe, a sludge inlet extending along the length direction of the sludge storage pipe and having an upward opening is formed in the upper side wall of the sludge storage pipe, the lower ends of the two sludge guide plates are respectively fixed on two sides of the sludge inlet, a sludge blocking pipe which is coaxial with the sludge storage pipe and can rotate is inserted in the side wall of the sludge storage pipe, and a sludge passing port matched with the sludge inlet is formed in the side wall of the sludge blocking pipe; the mud discharging mechanism further comprises a mud scraping plate which is arranged in the mud storage pipe and can move along the length direction of the mud storage pipe, and a pull rod which can stretch out the mud discharging pipe is arranged on the mud scraping plate.

Realize the sediment of mud through storing up the mud pipe, mud after the sediment is saved earlier in storing up the mud pipe, then pulls out it through the mud scraping plate, avoids mud to pile up and the jam that leads to in the exit of mud pipe, can discharge mud comparatively comprehensively, reaches better mud discharging effect.

Preferably, the mud scraper comprises a sliding plate and a rotating plate which are composed of two fan-shaped plates, the sliding plate and the rotating plate can be jointly constructed into a circular plate with the outer side wall in clearance fit with the inner wall of the mud storage pipe, the rotating plate is fixed at the end part of the pull rod, the sliding plate is sleeved on the pull rod and is located between the rotating plate and the end part of the pull rod, which extends out of the mud discharge pipe, a limiting sliding groove is formed in the inner wall of the mud storage pipe and is arranged along the length direction of the mud storage pipe, limiting convex blocks capable of sliding in the limiting sliding grooves are arranged on two arc-shaped surfaces of the sliding plate, a clamping pin capable of retracting into the rotating plate completely is arranged on one arc-shaped surface of the rotating plate, and two clamping grooves matched with the clamping pin are formed in the inner wall of the mud storage pipe.

Preferably, the arc-shaped surface of the rotating plate is provided with a containing groove for completely containing the bayonet lock, the bayonet lock is arranged in the containing groove and is connected to the bottom surface of the containing groove through a spring, the bayonet lock can extend out of the containing groove under the action of the spring, the outer side wall of the extending end of the bayonet lock is provided with a first inclined guide surface, and the side wall of the opening of the clamping groove is provided with a second inclined guide surface matched with the first inclined guide surface to allow the bayonet lock to be clamped into or separated from the clamping groove.

Preferably, the pull rod is further provided with a connecting rod connected with the mud blocking pipe, the inner side wall of the mud storage pipe is provided with an arc-shaped sliding groove for the connecting rod to slide, one end of the connecting rod is fixed on the outer side wall of the pull rod, and the other end of the connecting rod penetrates through the arc-shaped sliding groove and is fixed on the outer side wall of the mud blocking pipe. The pull rod controls the mud blocking pipe and the mud scraping plate simultaneously, the final mud discharging efficiency is effectively improved, and the pull rod controls the mud blocking pipe and the mud scraping plate simultaneously, so that the mud discharging device is simple and convenient.

Preferably, the two clamping grooves are respectively arranged at the lower top point and the left top point of the mud storage pipe, when the clamping pin is clamped into the clamping groove at the lower top point of the mud storage pipe, the rotating plate and the sliding plate are vertically and jointly formed into a circular plate along the length direction, and the mud inlet is in a state of being closed by the mud blocking pipe; when the bayonet lock is clamped into the bayonet lock at the left vertex of the mud storage pipe, the rotating plate is parallel to the sliding plate in the length direction, and the mud inlet and the mud passing port are relatively in an open state.

Preferably, a mud blocking cover is arranged on the end face of the mud discharging pipe, the end part of the pull rod, extending out of the mud discharging pipe, penetrates through the mud blocking cover and is fixedly provided with a handle, a rotating indication arrow is arranged on the handle, and the mud blocking cover is provided with an opening indication arrow and a closing indication arrow which are matched with the indicating arrow on the handle and are used for indicating the opening and closing state of the mud passing opening.

Preferably, the end face of the sludge discharge pipe is provided with a slot, the sludge blocking cover is provided with an inserting column which can be inserted into the slot, and the sludge blocking cover is inserted into the slot through the inserting column and is connected with the sludge discharge pipe. The mounting mode of the mud guard makes the mud guard convenient to mount and dismount, and the mud guard is circumferentially limited, so that the mud guard can accurately indicate the opening and closing state of the mud passing opening.

As the preferred, be equipped with many levels in the sedimentation tank and arrange and set up the drain pipe that is parallel to each other in same horizontal plane, the drain pipe sets up in mud guide plate upper portion, evenly is equipped with a plurality of wash ports on the pipe wall of drain pipe, on drain pipe one end all was fixed in the sedimentation tank inside wall, the other end all stretched out the sedimentation tank lateral wall and stretched out the tip and connect through a water main, and the water main is connected with the outlet pipe. The drain pipe adopts the mode of entering the drain pipe through the drain hole water and draining water, the whole drainage process is mild, the sludge deposited at the lower part of the sedimentation tank cannot be stirred, and the sludge-water separation in the true sense is realized.

Preferably, the water outlet pipe is provided with a water outlet valve, and the end part far away from the main water pipe is connected with a back flush water pump. The arrangement of the back flush water pump can flush a drain pipe, a mud guide plate, a mud storage pipe and the like in the sedimentation tank so as to facilitate the next use of the sedimentation tank.

Preferably, the mud guide plate comprises a screen plate with screen holes and filter cloth fixedly laid on the screen plate, and a water storage chamber is formed between the mud guide plate and the lower bottom surface of the sedimentation tank. Through leading the mud plate with mud-water mixture earlier through preliminary mud-water separation for lead the mud on mud plate upper portion more quick deposit to storing up the mud intraductal, accelerate sludge sedimentation, improve sedimentation tank treatment effeciency.

Due to the adoption of the technical scheme, the invention has the remarkable technical effects that:

the lower part of the sedimentation tank is designed into a sludge sedimentation and sludge discharge structure with a special structure, so that the sludge at the lower part of the sedimentation tank can be discharged more comprehensively, and a more ideal sludge discharge effect is achieved.

Drawings

Fig. 1 is a schematic structural view of embodiment 1 of the present invention.

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

Fig. 3 is a schematic structural view of the sludge storage pipe in fig. 2.

Fig. 4 is a schematic structural view of the mud guard pipe in fig. 2.

Fig. 5 is a schematic view of the structure of the scraper bar of fig. 2.

Fig. 6 is a sectional view of the rotating plate in fig. 5.

Fig. 7 is a schematic structural view of the oil discharge mechanism in fig. 2.

Fig. 8 is a schematic view of the oil scraping plate of fig. 2.

The names of the parts indicated by the numerical references in the drawings are as follows: 1-sedimentation tank, 2-oil discharge mechanism, 3-mud discharge mechanism, 4-mud blocking cover, 5-handle, 6-water discharge pipe, 101-mud discharge pipe, 102-water inlet pipe, 201-oil scraping plate, 202-oil receiving box, 203-conveyor belt, 204-oil discharge pipe, 205-through groove, 301-mud storage pipe, 302-mud guide plate, 303-mud inlet, 304-mud blocking pipe, 305-mud through port, 306-mud scraping plate, 307-pull rod, 308-sliding plate, 309-rotating plate, 310-limiting chute, 311-limiting lug, 312-bayonet lock, 313-bayonet lock, 314-containing groove, 315-first inclined guide surface, 316-second inclined guide surface, 317-connecting rod, 318-back flush-arc chute, 319-screen plate, 320-filter cloth, 321-water storage chamber, 401-slot, 601-water discharge hole, 602-water main, 603-water outlet pipe, 604-water pump.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Example 1

A sewage treatment device for urban riverways is shown in figures 1-8 and comprises a sedimentation tank 1 provided with a sludge discharge pipe 101, a water inlet pipe 102 is arranged at the upper part of the sedimentation tank 1, a sludge discharge mechanism 3 connected with the sludge discharge pipe 101 is arranged in the sedimentation tank 1, the sludge discharge mechanism 3 comprises a sludge storage pipe 301 arranged transversely and two sludge guide plates 302 arranged obliquely downwards, the two sludge guide plates 302 are symmetrically arranged, the sludge storage device and the front and rear side walls of the sedimentation tank 1 form a conical sludge storage chamber together, one end of a sludge storage pipe 301 is fixed on the inner side wall of the sedimentation tank 1, the other end of the sludge storage pipe is connected with a sludge discharge pipe 101, the upper side wall of the sludge storage pipe 301 is provided with a sludge inlet 303 which extends along the length direction of the sludge storage pipe 301 and has an upward opening, the lower ends of two sludge guide plates 302 are respectively fixed on two sides of the sludge inlet 303, a sludge blocking pipe 304 which is coaxial with the sludge storage pipe 301 and can rotate is inserted in the side wall of the sludge storage pipe 301, and the side wall of the sludge blocking pipe 304 is provided with a sludge passing opening 305 which can be matched with the sludge inlet 303; when the mud blocking pipe 304 rotates to the mud passing port 305 to correspond to the mud inlet 303, the mud inlet 303 is in an open state, and after the mud-water mixture is slowly precipitated, the mud sinks and enters the mud storage pipe 301 through the mud guide plate 302 to be precipitated.

The mud discharging mechanism 3 further comprises a mud scraping plate 306 which is arranged in the mud storage pipe 301 and can move along the length direction of the mud storage pipe 301, and a pull rod 307 which can extend out of the mud discharging pipe 101 is arranged on the mud scraping plate 306. The mud scraping plate 306 comprises a sliding plate 308 and a rotating plate 309 which are both composed of two fan-shaped plates, the sliding plate 308 and the rotating plate 309 can jointly form a circular plate with the outer side wall in clearance fit with the inner wall of the mud storage pipe 301, the rotating plate 309 is fixed at the end part of the pull rod 307, the sliding plate 308 is sleeved on the pull rod 307 and is positioned between the rotating plate 309 and the end part of the pull rod 307, which extends out of the mud discharge pipe 101, a limiting sliding groove 310 which is arranged along the length direction of the mud storage pipe 301 is arranged on the inner wall of the mud storage pipe 301, limiting convex blocks 311 which can slide in the limiting sliding grooves 310 are respectively arranged on two arc-shaped surfaces of the sliding plate 308, a bayonet 312 which can completely retract into the rotating plate 309 is arranged on one arc-shaped surface of the rotating plate 309, and two clamping grooves 313 which are matched with the bayonet 312 are arranged on the inner wall of the mud storage pipe 301.

Sediment in-process transfer plate 309 and sliding plate 308 are in the parallel state, and the arcwall face of two boards all arranges about facing this moment, and the opening side of two boards all arranges up down, and this kind of state can be convenient for mud gets into and stores up mud pipe 301, and can descend mud scraper 306 propelling movement to storing up mud pipe 301's the innermost side at this state, avoids the propelling movement in-process to push back mud and stores up mud pipe 301, improves final mud discharging efficiency.

After the muddy water in the sedimentation tank 1 is settled for a period of time, the sludge is settled in the sludge storage pipe 301, at the moment, the sludge can be discharged through the sludge scraping plate 306, the rotating plate is rotated to the position vertical to the sliding plate 308, so that the rotating plate 309 and the sliding plate 308 jointly form a circular plate attached to the inner wall of the sludge storage pipe 301, at the moment, the clamping pin 312 is clamped in the clamping groove 313 at the lower vertex of the sludge storage pipe 301, the rotating plate 309 is limited, and then the pull rod 307 is pulled, so that the sludge in the sludge storage pipe 301 is pulled to the position of the sludge discharge pipe 101 by the circular plate to be discharged.

In addition, the sludge discharge plate is designed into a structure of two plates arranged in front and back, the rotating plate 309 is fixed on the pull rod 307, and the sliding plate 308 is movably connected on the pull rod 307, so that the sliding plate 308 has a tendency of moving backwards under the reaction force of sludge in the process of pulling out the sludge, the sliding plate 308 and the rotating plate 309 can be tightly attached, the sludge is reduced from flowing out from a gap between the sliding plate 308 and the rotating plate 309, the sludge is pulled out to a greater extent, and the sludge discharge efficiency is improved; in the process of pushing the mud scraping plate 306 to the inner side of the mud storage pipe 301, the sliding plate 308 tends to move forwards under the action of the mud-water mixture, the pull rod 307 is provided with a limiting block for axially limiting the sliding plate 308, the sliding plate 308 is prevented from moving too much on the pull rod 307, a gap is formed between the sliding plate 308 and the rotating plate 309 after the sliding plate 308 moves, the mud-water mixture moves forwards in the process of pushing the mud scraping plate 306, on one hand, the mud-water mixture can move forwards from the notches on the sliding plate 308 and the rotating plate 309, on the other hand, the mud-water mixture can flow to the front of the mud scraping plate 306 from the gap between the sliding plate 308 and the rotating plate 309, preparation is made for pulling out the mud at the next time, and the mud is discharged more efficiently.

An accommodating groove 314 for completely accommodating the bayonet 312 is formed in the arc-shaped surface of the rotating plate 309, the bayonet 312 is arranged in the accommodating groove 314 and is connected to the bottom surface of the accommodating groove 314 through a spring, the bayonet 312 can extend out of the accommodating groove 314 under the action of the spring, a first inclined guide surface 315 is arranged on the outer side wall of the extending end of the bayonet 312, and a second inclined guide surface 316 which is matched with the first inclined guide surface 315 and is used for the bayonet 312 to be clamped into or separated from the bayonet 313 is arranged on the side wall of the opening of the bayonet 313. The cooperation of the first inclined guiding surface 315 and the second inclined guiding surface 316 can facilitate the locking pin 312 to be locked into and released from the locking slot 313, thereby providing a precondition for the rotation and the limit of the rotating plate 309. In the limiting process, the rotating plate 309 rotates to the position of the clamping groove 313, and the second inclined guide surface 316 on the clamping groove 313 acts on the first inclined guide surface 315 on the clamping pin 312, so that the clamping pin 312 retracts into the accommodating groove 314 against the elastic force of the spring, and is clamped into the clamping groove 313 under the elastic force of the spring when reaching the position of the clamping groove 313, and the limiting of the rotating plate 309 is realized; when the rotating plate 309 needs to be rotated, the second inclined guide surface 316 on the clamping groove 313 also acts on the first inclined guide surface 315 on the clamping pin 312, so that the clamping pin 312 retracts into the accommodating groove 314 against the elastic force of the spring, and meanwhile, the clamping pin 312 deviates from the position of the clamping groove 313, and the limit on the rotating plate 309 is released.

The pull rod 307 is further provided with a connecting rod 317 connected with the mud blocking pipe 304, an arc-shaped sliding groove 318 for the connecting rod 317 to slide is formed in the inner side wall of the mud storage pipe 301, one end of the connecting rod 317 is fixed to the outer side wall of the pull rod 307, and the other end of the connecting rod 317 penetrates through the arc-shaped sliding groove 318 to be fixed to the outer side wall of the mud blocking pipe 304. The two clamping grooves 313 are respectively arranged at the lower top point and the left top point of the mud storage pipe 301, when the clamping pins 312 are clamped into the clamping grooves 313 at the lower top point of the mud storage pipe 301, the length directions of the rotating plate 309 and the sliding plate 308 are vertical to each other to form a circular plate, and the mud inlet 303 is in a state of being closed by the mud blocking pipe 304; when the bayonet 312 is clamped into the bayonet 313 at the left top of the mud storage pipe 301, the rotating plate 309 is parallel to the length direction of the sliding plate 308, and the mud inlet 303 and the mud outlet 305 are relatively in an open state.

The rotation simultaneous control that fender mud pipe 304 and mud scraper 306 pass through pull rod 307 reaches row's mud in-process and stores up mud pipe 301 and be in the closed condition, stores up mud in-process and stores up mud pipe 301 and be in the open mode, effectively improves final mud discharging efficiency, controls simultaneously through a pull rod 307, and is simple and convenient.

In this embodiment, the number of the limiting sliding grooves 310 and the number of the locking grooves 313 are three, and the limiting sliding grooves 310 and the locking grooves 313 are respectively arranged at the left vertex, the right vertex and the lower vertex of the mud storage pipe 301, wherein the limiting sliding groove 310 located at the left vertex is the locking groove 313 at the same time, so that the limiting protrusion 311 on the sliding plate 308 can slide, and the locking groove 313 can also be used for limiting the locking pin 312.

Be equipped with fender mud lid 4 on the terminal surface of mud pipe 101, the tip that stretches out mud pipe 101 of pull rod 307 passes fender mud lid 4 and is fixed with handle 5, is equipped with on the handle 5 and rotates and indicates the arrow point, fender mud lid 4 be equipped with indicate on the handle 5 arrow point cooperation and be used for instructing opening of crossing mud mouth 305 open and shut state and indicate the arrow point with closing.

In addition, in this embodiment, the end surface of the mud pipe 101 is provided with a slot 401, the mud guard 4 is provided with an insertion column capable of being inserted into the slot 401, and the mud guard 4 is inserted into the slot 401 through the insertion column and is connected with the mud pipe 101. The mud blocking cover 4 has the function of blocking mud in the mud storage process, so that the mud can be effectively stored; on the other hand can also play the effect of keeping off mud in the mud process, mud spatters to handle 5 department when reducing the mud of arranging. The connected mode between fender mud cover 4 and the mud pipe 101 can realize on the one hand that the quick lid of fender mud cover 4 closes and opens, and on the other hand can also avoid fender mud cover 4 to rotate, makes the instruction arrow above that play clear and definite indicating action, and operating personnel can fully know according to the instruction arrow that mud pipe 301 is in the open or closed condition.

In this embodiment, it arranges and sets up in the drain pipe 6 that is parallel to each other in same horizontal plane to be equipped with many levels in sedimentation tank 1, and drain pipe 6 sets up in mud guide 302 upper portion, evenly is equipped with a plurality of wash ports 601 on drain pipe 6's the pipe wall, and on drain pipe 6 one end was all fixed in sedimentation tank 1 inside wall, the other end all stretched out sedimentation tank 1 lateral wall and stretched out the tip and connect through a water main 602, and water main 602 is connected with outlet pipe 603. The water outlet pipe 603 is provided with a water outlet valve, and the end far away from the water main 602 is connected with a back flush water pump 604.

In addition, the mud guide plate 302 comprises a screen plate 319 with screen holes and a filter cloth 320 fixedly laid on the screen plate 319, and a water storage chamber 321 is formed between the mud guide plate 302 and the lower bottom surface of the sedimentation tank 1.

After the sedimentation tank 1 is settled for a period of time, sludge sinks, water at the upper part of the sludge storage chamber can be discharged through the drain pipe 6, the water in the sedimentation tank 1 reversely enters the drain pipe 6 through the drain hole 601 in the drainage process, the drainage mode is slow and mild, sludge in the sedimentation tank 1 cannot be stirred, and the mud-water separation degree of the discharged water is ensured. The mud guide plate 302 is designed into the screen plate 319 with the filter cloth 320, so that a mud-water mixture entering the sedimentation tank 1 in the sedimentation process is firstly subjected to primary mud-water separation through the mud guide plate 302, mud on the upper part of the mud guide plate 302 is more quickly precipitated into the mud storage pipe 301, the mud sedimentation is accelerated, after the mud is precipitated for a period of time, water in the water storage chamber 321 slowly rises, the mud is basically precipitated in the rising process, then the mud and the water cannot be mixed again, and then the mud and the water are slowly discharged through the water discharge pipe 6.

The outlet pipe 603 is provided with an outlet valve in a closed state in the sedimentation process, and is in an open state in the drainage process. When the interior of the sedimentation tank 1 needs to be cleaned after sludge discharge, water can enter the water discharge pipe 6 through the back flush water pump 604, the water discharge pipe 6, the sludge guide plate 302 and the sludge storage pipe 301 are flushed, and finally the flushed sewage is discharged through the sludge discharge pipe 101, so that the back flush of the interior of the sedimentation tank 1 is realized.

In the embodiment, an oil discharge mechanism 2 is arranged in the sedimentation tank 1 and above the water inlet pipe 102, the oil discharge mechanism 2 comprises an oil scraping plate 201, an oil receiving box 202 and a conveying belt 203 which is horizontally arranged, two sides of the conveying belt 203 in the width direction are in clearance fit with the front side wall and the rear side wall of the sedimentation tank 1, an oil discharge pipe 204 is arranged on the side wall of the sedimentation tank 1, and the oil receiving box 202 is arranged below one end of the conveying belt 203 and is communicated with the oil discharge pipe 204; the oil scraping plate 201 is arranged above the oil receiving box 202, one end of the oil scraping plate is fixed on the inner wall of the sedimentation tank 1, and the other end of the oil scraping plate is attached to the end part of the conveyor belt 203.

The oil receiving box 202 is a rectangular shell comprising a bottom plate, a rear side plate, a left side plate and a right side plate, a groove with an opening at the upper end for the conveyor belt 203 to be clamped is formed in the rear side plate, the end part of the conveyor belt 203 penetrates through the groove and extends into the oil receiving box 202, the side wall of the groove is attached to the side wall of the conveyor belt 203, and the movement of the conveyor belt 203 is not influenced while oil scraping is performed; the end of the oil receiving box 202 opposite to the rear side plate is fixed on the side wall of the sedimentation tank 1. The thickness of the middle part of the oil scraping plate 201 to the end part, attached to the conveying belt 203, of the oil scraping plate 201 is gradually reduced, and the end part, attached to the conveying belt 203, of the oil scraping plate 201 is provided with a plurality of through grooves 205 which are uniformly distributed in the width direction of the oil scraping plate 201 and through which oil is supplied.

After the sedimentation tank 1 is sedimentated for a period of time, the sludge in the sedimentation tank sinks, the oil-water mixture rises, and due to different oil-water densities, so that the oil floats on the water surface, the oil can be drained firstly and then drained, in the oil draining process, the motor drives the conveyor belt 203 to rotate, the material of the conveyor belt 203 is a material which can adhere the oil on the surface but does not absorb the oil, in the rotating process of the conveyor belt 203, the floating oil is adhered on the surface of the conveyor belt 203 until the oil is conveyed to the oil scraping plate 201, the oil on the surface of the conveyor belt 203 is scraped under the action of the oil scraping plate 201, one part of the scraped oil falls into the oil receiving box 202 through the through groove 205 on the oil scraping plate 201, the other part of the scraped oil is pushed to the two sides of the conveyor belt 203 and then falls into the oil receiving box 202 along the side surface of the conveyor belt 203, then the oil is collected in the oil receiving box 202 and finally discharged through the oil discharge pipe 204, so that the aim of removing the oil in the sewage is fulfilled.

In summary, the above-mentioned embodiments are only preferred embodiments of the present invention, and all equivalent changes and modifications made in the claims of the present invention should be covered by the claims of the present invention.

Claims (9)

1. A sewage treatment plant for city river course, including sedimentation tank (1) that is equipped with sludge discharge pipe (101), the upper portion of sedimentation tank (1) is equipped with inlet tube (102), its characterized in that: a sludge discharging mechanism (3) connected with a sludge discharging pipe (101) is arranged in the sedimentation tank (1), the sludge discharging mechanism (3) comprises a sludge storage pipe (301) which is transversely arranged and two sludge guide plates (302) which are obliquely arranged downwards, one end of the sludge storage pipe (301) is fixed on the inner side wall of the sedimentation tank (1), the other end of the sludge storage pipe is connected with the sludge discharging pipe (101), a sludge inlet (303) which extends along the length direction of the sludge storage pipe (301) and has an upward opening is formed in the upper side wall of the sludge storage pipe (301), the lower ends of the two sludge guide plates (302) are respectively fixed on two sides of the sludge inlet (303), a sludge blocking pipe (304) which is coaxial with the sludge storage pipe (301) and can rotate is inserted in the side wall of the sludge storage pipe (301), and a sludge passing port (305) which can be matched with the sludge inlet (303) is formed in the side wall of the sludge blocking pipe (304); the mud discharging mechanism (3) also comprises a mud scraping plate (306) which is arranged in the mud storage pipe (301) and can move along the length direction of the mud storage pipe (301), and a pull rod (307) which can extend out of the mud discharging pipe (101) is arranged on the mud scraping plate (306);

the mud scraping plate (306) comprises a sliding plate (308) and a rotating plate (309) which are composed of two fan-shaped plates, the sliding plate (308) and the rotating plate (309) can jointly form a circular plate with the outer side wall in clearance fit with the inner wall of the mud storage pipe (301), the rotating plate (309) is fixed at the end part of a pull rod (307), the sliding plate (308) is sleeved on the pull rod (307) and located between the rotating plate (309) and the end part, extending out of the mud discharge pipe (101), of the pull rod (307), a limiting sliding groove (310) arranged along the length direction of the mud storage pipe (301) is formed in the inner wall of the mud storage pipe (301), limiting convex blocks (311) capable of sliding in the limiting sliding groove (310) are arranged on two arc-shaped surfaces of the sliding plate (308), a clamping pin (312) capable of completely retracting into the rotating plate (309) is arranged on one arc-shaped surface of the rotating plate (309), and two clamping grooves (313) matched with the clamping pin (312) are formed in the inner wall of the mud storage pipe (301).

2. The sewage treatment apparatus for the urban river according to claim 1, wherein: be equipped with storage tank (314) that the complete holding bayonet lock (312) on the arcwall face of rotor plate (309), bayonet lock (312) set up in storage tank (314) and through a spring coupling on storage tank (314) bottom surface, bayonet lock (312) can stretch out storage tank (314) under the spring action, be equipped with first slope spigot surface (315) on the lateral wall of the end that stretches out of bayonet lock (312), be equipped with on the lateral wall at draw-in groove (313) opening part with first slope spigot surface (315) cooperation supply bayonet lock (312) to block in or deviate from second slope spigot surface (316) of draw-in groove (313).

3. The sewage treatment apparatus for the urban river according to claim 2, wherein: still be equipped with a connecting rod (317) of being connected with fender mud pipe (304) on pull rod (307), be equipped with on the inside wall of storing up mud pipe (301) and supply gliding arc spout (318) of connecting rod (317), connecting rod (317) one end is fixed on pull rod (307) lateral wall, and the other end passes arc spout (318) and fixes on fender mud pipe (304) lateral wall.

4. The sewage treatment apparatus for the urban river according to claim 3, wherein: the two clamping grooves (313) are respectively arranged at the lower top point and the left top point of the mud storage pipe (301), when the clamping pin (312) is clamped in the clamping groove (313) at the lower top point of the mud storage pipe (301), the length directions of the rotating plate (309) and the sliding plate (308) are vertical to form a circular plate together, and the mud inlet (303) is in a state of being closed by the mud blocking pipe (304); when the clamping pin (312) is clamped into the clamping groove (313) at the left top point of the mud storage pipe (301), the rotating plate (309) is parallel to the length direction of the sliding plate (308), and the mud inlet (303) and the mud outlet (305) are relatively in an open state.

5. The sewage treatment apparatus for the urban river according to claim 1, wherein: be equipped with fender mud cover (4) on the terminal surface of mud pipe (101), the tip that stretches out mud pipe (101) of pull rod (307) passes fender mud cover (4) and is fixed with handle (5), is equipped with on handle (5) and rotates and indicates the arrow head, fender mud cover (4) be equipped with indicate on handle (5) arrow head cooperation and be used for instructing opening of mud mouth (305) state of opening and shutting and indicate the arrow head with close.

6. The sewage treatment apparatus for the urban river according to claim 5, wherein: be equipped with slot (401) on the terminal surface of mud pipe (101), be equipped with the post of inserting that can insert in slot (401) on fender mud lid (4), fender mud lid (4) are connected with mud pipe (101) in inserting slot (401) through inserting the post.

7. The sewage treatment apparatus for the urban river according to claim 1, wherein: be equipped with many levels in sedimentation tank (1) and arrange and set up drain pipe (6) that are parallel to each other in same horizontal plane, drain pipe (6) set up in mud guide plate (302) upper portion, evenly be equipped with a plurality of wash ports (601) on the pipe wall of drain pipe (6), on drain pipe (6) one end all was fixed in sedimentation tank (1) inside wall, the other end all stretched out sedimentation tank (1) lateral wall and stretched out the tip and connect through a water main (602), water main (602) are connected with outlet pipe (603).

8. The sewage treatment apparatus for the urban river according to claim 7, wherein: the water outlet pipe (603) is provided with a water outlet valve, and the end part far away from the water main (602) is connected with a back flush water pump (604).

9. The sewage treatment apparatus for the urban river according to claim 1, wherein: the mud guide plate (302) comprises a screen plate (319) with screen holes and filter cloth (320) fixedly laid on the screen plate (319), and a water storage chamber (321) is formed between the mud guide plate (302) and the lower bottom surface of the sedimentation tank (1).

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