Sewage pretreatment equipment for municipal water supply and drainage

Abstract

The sewage pretreatment equipment for municipal water supply and drainage comprises a high-pressure flushing mechanism arranged in a vertical flow type sedimentation tank, and the high-pressure flushing mechanism comprises a lifting moving assembly, an annular pipe, a plurality of connecting rings, a plurality of nozzles, a water supply assembly and a rotary driving assembly; the lifting moving assembly is erected in the vertical flow type sedimentation tank; the annular pipe sleeves the outer side of the central pipe, and the top of the annular pipe is connected with the output end of the lifting moving assembly; the plurality of connecting rings are rotatably connected to the annular pipe in a surrounding manner; the multiple nozzles are correspondingly connected with the multiple connecting rings through the connecting pipes, arc-shaped notches are formed in the pipe wall of the annular pipe, and the annular pipe communicates with the connecting pipes through the arc-shaped notches. The water supply assembly communicates with the annular pipe. The rotary driving assembly is connected with the multiple connecting rings and used for driving the multiple connecting rings to rotate. Through the arrangement of the high-pressure flushing mechanism, the automatic cleaning process of dirt gathered on the surface of the reflecting plate and dirt gathered on the inner wall of the bottom of the settling pond can be achieved, and the cleaning range is enlarged.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, in particular to sewage pretreatment equipment for municipal water supply and drainage. Background Art

[0002] Sewage pretreatment is the first key link in the municipal water supply and drainage sewage treatment process. It is mainly used to remove large particles of impurities, sand, suspended matter and some grease in sewage to protect subsequent treatment equipment, reduce pipeline blockage and improve overall treatment efficiency.

[0003] The suspended solids in the sewage can be removed by sedimentation treatment in the sedimentation tank. The current sedimentation tanks are mainly divided into vertical flow sedimentation tanks, horizontal flow sedimentation tanks, radial flow sedimentation tanks, inclined plate sedimentation tanks, etc. Among them, the vertical flow sedimentation tank allows the wastewater to enter from the central pipe in the center of the sedimentation tank, and then evenly distributes it on the cross section of the sedimentation tank through the reflector plate hung and fixed at the outlet of the lower end of the central pipe. The water flows out from the bottom to the top, while the suspended solids and sludge will gradually settle at the bottom of the sedimentation tank and finally be discharged through the sludge discharge pipe. With long-term treatment, some suspended solids will become dirt attached to the inner wall of the sedimentation tank and the surface of the reflector. The accumulation of dirt attached to the inner wall of the sedimentation tank will reduce the effective volume of the sedimentation tank, resulting in a shortened hydraulic retention time and insufficient precipitation of suspended solids. Since the function of the reflector is to evenly disperse the water flow and slow down the impact of water inflow, if the surface is covered with dirt, its diversion and buffering effect will be significantly reduced. Therefore, it is necessary to regularly clean the dirt attached to the inner wall of the sedimentation tank and the surface of the reflector.

[0004] The current cleaning method mainly uses automated cleaning equipment for cleaning. The structure of the automated cleaning equipment is usually composed of a rotating drive unit and a scraper. The scraper is brought into contact with the surface of the structure to be cleaned, and then the rotating drive unit is used to drive the scraper to rotate to realize a rotary scraping and cleaning process. However, since the reflector is usually suspended and fixed to the lower end of the central tube by a connecting rod, the presence of the connecting rod will hinder the rotation of the scraper, making it difficult for the scraper to extend into the center of the reflector to realize the cleaning process of the reflector surface, thereby making some areas difficult to clean. As a result, the current cleaning device is difficult to simultaneously clean the inner wall of the sedimentation tank and the dirt attached to the surface of the reflector, and there is a problem of limited cleaning range. Summary of the invention

[0005] The purpose of the present invention is to provide a sewage pretreatment device for municipal water supply and drainage, so as to solve the problem that in the prior art, the cleaning process is difficult to be cleaned due to the obstruction at the connection of the reflector plate and the cleaning range is limited.

[0006] The technical solution of the present invention is:

[0007] A sewage pretreatment device for municipal water supply and drainage comprises a high-pressure flushing mechanism arranged in a vertical flow sedimentation tank, the high-pressure flushing mechanism comprises a lifting and moving assembly, an annular pipe, a plurality of connecting rings, a plurality of nozzles, a water supply assembly and a rotating drive assembly; the lifting and moving assembly is erected in the vertical flow sedimentation tank; the annular pipe is used to be sleeved on the outside of a central pipe, the top of the annular pipe is connected to the output end of the lifting and moving assembly, and moves vertically under the drive of the lifting and moving assembly; a plurality of connecting rings are sleeved around the annular pipe and are rotatably connected to the annular pipe; a plurality of nozzles are respectively connected to a plurality of the connecting rings through connecting pipes, and an arc-shaped notch is provided on the pipe wall of the annular pipe located on the inner side of the connecting ring, and the annular pipe is connected to the connecting pipe through the arc-shaped notch; the water supply assembly is connected to the annular pipe, and is used to inject high-pressure water flow into the annular pipe and spray it out through the nozzle; the rotating drive assembly is connected to the plurality of connecting rings, and is used to drive the plurality of connecting rings to rotate to adjust the spraying angle of the nozzle.

[0008] Preferably, as a further improvement of the present invention, each of the connecting pipes is provided with a one-way valve.

[0009] Preferably, as a further improvement of the present invention, the lifting and moving assembly includes at least two multi-stage hydraulic cylinders, which are arranged above the annular pipe, and the cylinder body of each of the multi-stage hydraulic cylinders is fixed to a bracket erected on the vertical flow sedimentation tank, and the piston rod end of each of the multi-stage hydraulic cylinders is fixed to the top of the annular pipe.

[0010] Preferably, as a further improvement of the present invention, the water supply assembly includes a flexible water supply pipe, one end of which is connected to the annular pipe, and the other end of which extends to the outside of the vertical flow sedimentation tank and is connected to a high-pressure water pump.

[0011] Preferably, as a further improvement of the present invention, the rotary drive assembly includes a mounting ring, a plurality of spur racks, a plurality of arcuate racks and a spacing adjustment structure; the mounting ring is arranged in parallel above the annular tube, the diameter of the mounting ring is larger than the diameter of the annular tube, and the mounting ring and the annular tube are arranged coaxially; the number of the plurality of spur racks is the same as that of the connecting rings, the plurality of spur racks are vertically and evenly distributed and fixed on the bottom of the mounting ring, and the teeth of each spur rack are arranged opposite to the connecting ring; the plurality of arcuate racks are fixed one by one on the circumferential outer wall of each connecting ring, and each arcuate rack is meshed with each spur rack; the spacing adjustment structure is connected between the mounting ring and the annular tube, and is used to adjust the vertical spacing between the mounting ring and the annular tube.

[0012] Preferably, as a further improvement of the present invention, the spacing adjustment structure includes a first fixed seat, a second fixed seat and a telescopic rod; the first fixed seat is fixed on the annular tube; the second fixed seat is fixed on the inner wall of the mounting ring; the telescopic rod is connected between the first fixed seat and the second fixed seat.

[0013] Preferably, as a further improvement of the present invention, the spacing adjustment structure has two groups, which are symmetrically arranged on both sides of the annular tube.

[0014] Preferably, as a further improvement of the present invention, the connecting ring and the annular tube are sealed and rotatably connected.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. By setting up a high-pressure flushing mechanism composed of a lifting and moving component, a ring pipe, multiple connecting rings, multiple nozzles, a water supply component and a rotating drive component, the rotating drive component is used to drive the multiple connecting rings to rotate to adjust the spraying angle of the nozzle, thereby realizing the automatic removal process of the dirt accumulated on the surface of the reflector and the dirt accumulated on the inner wall of the bottom of the vertical flow sedimentation tank. Since high-pressure flushing is used for cleaning, it will not be hindered by the connecting rod, thereby avoiding the problem of limiting the cleaning area and affecting the cleaning range.

[0017] 2. The different height flushing positions of the high-pressure flushing mechanism can be adjusted by setting the lifting and moving components, and the spraying angle of the nozzle can be adjusted by cooperating with the rotating drive components. It can not only flush the dirt accumulated on the surface of the reflector plate and the dirt accumulated on the inner wall of the bottom of the vertical flow sedimentation tank, but also flush and clean the dirt adhering to the outer wall of the central tube, thereby further increasing the effective volume.

[0018] 3. The rotating drive assembly can repeatedly drive the nozzle to flush in a swinging manner when cleaning the dirt accumulated on the inner wall of the bottom of the vertical flow sedimentation tank. While expanding the cleaning area, the flushing angle can be continuously changed to achieve complete cleaning of the inner wall of the bottom of the vertical flow sedimentation tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of a sewage pretreatment device for municipal water supply and drainage according to the present invention.

[0020] Figure 2 The schematic diagram of the top view of the structure of a sewage pretreatment device for municipal water supply and drainage according to the present invention.

[0021] Figure 3 It is a schematic diagram of the main cross-sectional structure of a sewage pretreatment device for municipal water supply and drainage of the present invention when it is assembled in a vertical flow sedimentation tank for use.

[0022] Figure 4 For the present invention Figure 3 A local enlarged schematic diagram of point A in the figure.

[0023] Figure 5 This is a schematic diagram of the main structure of a municipal water supply and drainage sewage pretreatment device placed inside a vertical flow sedimentation tank according to the present invention. DETAILED DESCRIPTION

[0024] The following is combined with Figure 1 To the attached Figure 5 , the specific implementation methods of the present invention are described in detail. In the description of the invention, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0025] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features; in the description of the invention, unless otherwise specified, "plurality" means two or more.

[0026] Example

[0027] like Figures 1 to 5 As shown, an embodiment of the present invention provides a sewage pretreatment device for municipal water supply and drainage, including a vertical flow sedimentation tank 1, the vertical flow sedimentation tank 1 is a barrel structure with a conical bottom, a water collecting tank 11 is provided on the upper outer wall of the vertical flow sedimentation tank 1, a drainage pipe 12 is provided on the side wall of the water collecting tank 11, a circle of overflow baffles 13 is provided at the upper port of the vertical flow sedimentation tank 1, the height of the water collecting tank 11 is higher than the height of the overflow baffle 13, a vertically arranged central pipe 14 is provided at the inner center of the vertical flow sedimentation tank 1, the side wall of the central pipe 14 is erected at the notch of the water collecting tank 11 through a mounting plate 15, a reflecting plate 16 is connected below the outlet of the central pipe 14, a sewage inlet pipe 17 is connected to one side wall of the vertical flow sedimentation tank 1, and one end of the sewage inlet pipe 17 extends to the inside of the central pipe 14, and a mud discharge pipe 18 is connected to the other side wall of the vertical flow sedimentation tank 1, and one end of the mud discharge pipe 18 extends to the bottom conical sedimentation area of ​​the sedimentation tank 1;

[0028] During sewage pretreatment, the sewage is sent into the central pipe 14 through the sewage inlet pipe 17, moves vertically, and is evenly distributed in the pool through the reflector 16, and then slowly rises along the entire water flow section. The suspended matter in the sewage gradually settles to the bottom of the vertical flow sedimentation tank 1 under the action of gravity, and the clean water flows into the sump 13 through the overflow baffle 15 and is discharged through the drain pipe 14 for subsequent sewage treatment process, and the precipitated suspended matter particles are discharged through the sludge discharge pipe 12.

[0029] In order to clean the dirt accumulated on the surface of the reflector 16 and the inner wall at the bottom of the vertical flow sedimentation tank 1, a high-pressure flushing mechanism is provided in the vertical flow sedimentation tank 1. The high-pressure flushing mechanism includes a lifting and moving component 2, an annular pipe 3, a plurality of connecting rings 4, a plurality of nozzles 5, a water supply component and a rotating drive component; the lifting and moving component 2 is set in the vertical flow sedimentation tank 1; the annular pipe 3 is used to be sleeved on the outside of the central pipe 14, and the top of the annular pipe 3 is connected to the output end of the lifting and moving component 2. Straight movement; multiple connecting rings 4 are arranged around the annular tube 3 and are rotatably connected to the annular tube 3; multiple nozzles 5 are respectively connected to the multiple connecting rings 4 through connecting pipes 51, and the annular tube 3 is provided with an arc-shaped notch on the tube wall on the inner side of the connecting ring 4, and the annular tube 3 is connected to the connecting pipe 51 through the arc-shaped notch; the water supply component is connected to the annular tube 3, and is used to inject high-pressure water into the annular tube 3 and spray it out through the nozzle 5; the rotation drive component is connected to the multiple connecting rings 4, and is used to drive the multiple connecting rings 4 to rotate to adjust the spraying angle of the nozzle 5.

[0030] In this embodiment, when cleaning the dirt accumulated on the surface of the reflective plate 16 and the inner wall at the bottom of the vertical flow sedimentation tank 1, the annular tube 5 is driven downward by controlling the lifting and moving component 4, and stops moving when it moves to the reflective plate 3. The rotation driving component is controlled to drive the multiple connecting rings 4 to rotate to adjust the spraying angle of the nozzle 5, so that the multiple nozzles 5 face the top of the reflective plate 16, and the water supply component is turned on to inject high-pressure water into the annular tube 3 and spray it out through the nozzle 5. The dirt accumulated on the top of the reflective plate 16 is washed with high-pressure water, which can effectively avoid the problem of limited cleaning area due to the existence of the connecting rod. After the cleaning is completed, the lifting and moving component 4 is controlled to rotate. The annular tube 5 is driven to continue to descend until it stops at the bottom inner wall of the vertical flow sedimentation tank 1. The multiple connecting rings 4 are driven to rotate by controlling the rotating drive component to adjust the spraying angles of the multiple nozzles 5, and the multiple nozzles 5 are used to swing and flush the bottom inner wall of the vertical flow sedimentation tank 1 in a reciprocating manner, thereby expanding the flushing area and making the bottom inner wall of the vertical flow sedimentation tank 1 clean more thoroughly. After the overall cleaning is completed, the annular tube 5 is driven to rise to the bottom of the sewage inlet pipe 17 by the lifting and moving component 4 and then remain stationary, so as not to affect the subsequent sedimentation process. Only when cleaning is needed, the high-pressure flushing mechanism is controlled to move as a whole to the corresponding position for flushing operations.

[0031] Further, such as Figure 4 As shown, in order to prevent the sewage in the vertical flow sedimentation tank 1 from flowing back to the annular pipe 3 through the nozzle 15, so that impurities exist inside the annular pipe 3, a one-way valve 52 is provided on each connecting pipe 51. The one-way valve 52 can enable the cleaning water in the annular pipe 3 to be sprayed out through the nozzle 15, while the sewage cannot flow in reverse.

[0032] Specifically, Figure 1 As shown, the lifting and moving assembly 2 includes at least two multi-stage hydraulic cylinders, which are arranged above the annular pipe 3. The cylinder body of each multi-stage hydraulic cylinder is fixed to the bracket erected on the vertical flow sedimentation tank 1, and the piston rod end of each multi-stage hydraulic cylinder is fixed to the top of the annular pipe 3. The multi-stage hydraulic cylinders can provide more lifting and moving space on the basis of reducing the space occupied, so that the nozzle 5 can be controlled to move to the bottom of the vertical flow sedimentation tank 1.

[0033] Specifically, the water supply assembly includes a flexible water supply pipe 6, one end of which is connected to the annular pipe 3, and the other end of the flexible water supply pipe 6 extends to the outside of the vertical flow sedimentation tank 1 and is connected to a high-pressure water pump, and the high-pressure water pump provides high-pressure flushing water flow to realize the flushing process.

[0034] Further, as a specific implementation of the rotary drive assembly, the rotary drive assembly in this embodiment includes a mounting ring 71, a plurality of spur racks 72, a plurality of arcuate racks 73 and a spacing adjustment structure 74; the mounting ring 71 is arranged in parallel above the annular tube 3, the diameter of the mounting ring 71 is larger than the diameter of the annular tube 3, and the mounting ring 71 is coaxially arranged with the annular tube 3; the number of the plurality of spur racks 72 is the same as that of the connecting ring 4, the plurality of spur racks 72 are vertically and evenly distributed and fixed on the bottom of the mounting ring 71, and the teeth of each spur rack 72 are arranged directly opposite to the connecting ring 4; the plurality of arcuate racks 73 are fixed one by one on the circumferential outer wall of each connecting ring 4, and each arcuate rack 73 is meshed with each spur rack 72; the spacing adjustment structure 74 is connected between the mounting ring 71 and the annular tube 3, and is used to adjust the vertical spacing between the mounting ring 71 and the annular tube 3.

[0035] In this embodiment, when the multiple connecting rings 4 are driven to rotate by the rotating drive assembly to adjust the spraying angle of the nozzle 5, the vertical spacing between the mounting ring 71 and the annular tube 3 is adjusted by controlling the spacing adjustment structure 74. During the adjustment process, the multiple spur racks 72 are driven to move vertically. During the movement of the spur racks 72, the arc-shaped racks 73 are driven to rotate, thereby driving the connecting rings 4 and the nozzle 5 to rotate, thereby adjusting the spraying angle.

[0036] Specifically, the spacing adjustment structure 74 includes a first fixed seat 741, a second fixed seat 742 and a telescopic rod 743; the first fixed seat 741 is fixed on the annular tube 3; the second fixed seat 742 is fixed on the inner wall of the mounting ring 71; the telescopic rod 743 is connected between the first fixed seat 741 and the second fixed seat 742.

[0037] When the vertical distance between the mounting ring 71 and the annular tube 3 is adjusted by the distance adjustment structure 74, the telescopic rod 743 can be controlled to be extended or retracted. By controlling the extension or contraction of the telescopic rod 743, the spraying rotation angle direction can be adjusted.

[0038] The telescopic rod 743 may be a waterproof electric telescopic rod or a hydraulic cylinder.

[0039] Furthermore, in order to maintain the balance of the overall movement, there are two groups of spacing adjustment structures 74 symmetrically arranged on both sides of the annular tube 3 .

[0040] Furthermore, in order to prevent the sewage in the vertical flow sedimentation tank 1 from leaking into the annular pipe 3 during the rotation of the connecting ring 4, the connecting ring 4 and the annular pipe 3 are sealed and rotatably connected, and specifically an O-ring is used for sealing.

[0041] In summary, the present invention provides a high-pressure flushing mechanism composed of a lifting and moving component, an annular tube, multiple connecting rings, multiple nozzles, a water supply component and a rotating drive component. The rotating drive component is used to drive the multiple connecting rings to rotate to adjust the spraying angle of the nozzle, thereby realizing an automatic cleaning process of the dirt accumulated on the surface of the reflector plate and the dirt accumulated on the inner wall of the bottom of the vertical flow sedimentation tank. The lifting and moving component can adjust the different height flushing positions of the high-pressure flushing mechanism, and the spraying angle of the nozzle can be adjusted by cooperating with the rotating drive component. Not only can the dirt accumulated on the surface of the reflector plate and the dirt accumulated on the inner wall of the bottom of the vertical flow sedimentation tank be flushed, but also the dirt adhered to the outer wall of the central tube can be flushed and cleaned, thereby further increasing the effective volume. The rotating drive component can repeatedly drive the nozzle to flush in a swinging form when cleaning the dirt accumulated on the inner wall of the bottom of the vertical flow sedimentation tank. While expanding the cleaning area, the flushing angle can be continuously changed to achieve thorough cleaning of the inner wall of the bottom of the vertical flow sedimentation tank.

[0042] The above disclosures are only several preferred specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A sewage pretreatment equipment for municipal water supply and drainage, characterized in that: The invention comprises a high-pressure flushing mechanism arranged in a vertical flow sedimentation tank (1), wherein the high-pressure flushing mechanism comprises: A lifting and moving assembly (2) is installed in the vertical flow sedimentation tank (1); The annular tube (3) is used to be sleeved on the outside of the central tube (14), the top of the annular tube (3) is connected to the output end of the lifting and moving component (2), and moves vertically under the drive of the lifting and moving component (2); A plurality of connecting rings (4) are arranged around the annular tube (3) and are rotatably connected to the annular tube (3); A plurality of nozzles (5) are respectively connected to the plurality of connecting rings (4) via connecting pipes (51); an arc-shaped notch is provided on the pipe wall of the annular pipe (3) located inside the connecting ring (4); the annular pipe (3) is connected to the connecting pipe (51) via the arc-shaped notch; A water supply assembly, connected to the annular tube (3), used to inject high-pressure water into the annular tube (3) and spray it out through the nozzle (5); The rotary drive assembly is connected to the plurality of connecting rings (4) and is used to drive the plurality of connecting rings (4) to rotate so as to adjust the spraying angle of the spray head (5).

2. The municipal sewage pretreatment equipment according to claim 1, characterized in that: Each of the connecting pipes (51) is provided with a one-way valve (52).

3. The municipal sewage pretreatment equipment according to claim 1, characterized in that: The lifting and moving assembly (2) comprises at least two multi-stage hydraulic cylinders, which are arranged above the annular pipe (3); the cylinder body of each multi-stage hydraulic cylinder is fixed to a bracket mounted on the vertical flow sedimentation tank (1); and the piston rod end of each multi-stage hydraulic cylinder is fixed to the top of the annular pipe (3).

4. The municipal sewage pretreatment equipment according to claim 1, characterized in that: The water supply assembly comprises a flexible water supply pipe (6), one end of which is connected to the annular pipe (3), and the other end of which extends to the outside of the vertical flow sedimentation tank (1) and is connected to a high-pressure water pump.

5. The municipal sewage pretreatment equipment for water supply and drainage according to any one of claims 2 to 4, characterized in that: The rotary drive assembly comprises: A mounting ring (71) is arranged in parallel above the annular tube (3); the diameter of the mounting ring (71) is larger than the diameter of the annular tube (3); and the mounting ring (71) and the annular tube (3) are arranged coaxially; a plurality of spur racks (72), the number of which is the same as the number of the connecting ring (4), the plurality of spur racks (72) being evenly distributed vertically and fixed around the bottom of the mounting ring (71), and the teeth of each spur rack (72) being arranged facing the connecting ring (4); A plurality of arc-shaped racks (73) are fixed one by one on the circumferential outer wall of each of the connecting rings (4), and each of the arc-shaped racks (73) is meshed with each of the straight racks (72); The spacing adjustment structure (74) is connected between the mounting ring (71) and the annular tube (3) and is used to adjust the vertical spacing between the mounting ring (71) and the annular tube (3).

6. The municipal sewage pretreatment equipment according to claim 5, characterized in that: The spacing adjustment structure (74) comprises: A first fixing seat (741) fixed on the annular tube (3); A second fixing seat (742) fixed on the inner side wall of the mounting ring (71); The telescopic rod (743) is connected between the first fixing seat (741) and the second fixing seat (742).

7. The municipal sewage pretreatment equipment according to claim 6, characterized in that: There are two groups of the spacing adjustment structures (74), which are symmetrically arranged on both sides of the annular tube (3).

8. The municipal sewage pretreatment equipment according to claim 1, characterized in that: The connecting ring (4) is connected to the annular tube (3) in a sealed and rotatable manner.

Images