Water conservancy pipe network sewage purification device and control method

Abstract

The application discloses a water conservancy pipe network sewage purification device and a control method, and relates to the technical field of sewage treatment. The application is characterized in that a sand scraping strip plate and a sand scraping cone are arranged on the upper surface of the sand in the sand hopper, a horizontal driving device is designed to drive a horizontal rod to move back and forth, and a rotating connecting rod is driven to rotate, so that the sand scraping strip plate and the sand scraping cone are driven to rotate, the sand that is combined together is scraped layer by layer, and the sand is discharged through a suction pipe and a suction hole. The turbidity of the mixed liquid is monitored to ensure that the concentration of the discharged sand is real-time, and the remaining thickness of the sand is detected in real time through a photoelectric distance detection module. The remaining liquid level is monitored and judged through a liquid level distance sensor. The downward pressure of the sand scraping strip plate is increased to accelerate the scraping of the sand at the position exceeding the standard height, so that the sand and the liquid level are lowered. When the liquid level cannot continue to be discharged, the scraping and discharge of the sand are basically completed.

Description

TECHNICAL FIELD

[0001] The present application relates to the sewage treatment technical field, and particularly relates to a water conservancy pipe network sewage purification device and a control method. BACKGROUND

[0002] The cyclone grit chamber is a kind of cyclone separator, which is often used for removing sand in sewage. It mainly utilizes mechanical force to control water flow state and flow rate, accelerates the sedimentation of sand particles and makes organic matter carried away by water flow.

[0003] The cyclone grit chamber is composed of a flow inlet, a flow outlet, a grit chamber, a sand hopper, a turbine driving device and a sand discharge system. The sewage flows into the grit chamber in a tangential direction from the flow inlet, and a drop weir is arranged in the inlet channel to make the sand deposited on the bottom of the channel slide downward into the grit chamber. A baffle is arranged in the channel to make the water flow and sand flow to the bottom of the grit chamber and strengthen the wall attachment effect. An adjustable paddle is arranged in the middle of the grit chamber to keep the water flow circulating in the chamber. The paddle, the baffle and the inlet water flow are combined together, and the rotating turbine blades make the sand particles flow in a spiral shape, promoting the separation of organic matter and sand particles. Due to different centrifugal forces, the sand particles with relatively high specific density are thrown to the wall of the chamber and sink into the sand hopper under the action of gravity. The lighter organic matter is separated from the sand in the middle part of the grit chamber, and the organic matter is carried out of the chamber with the outlet water flow. By adjusting the rotating speed, the best grit removal effect can be achieved. The sand in the sand hopper can be removed by air lifting, sand pump and other ways, and then the sand and water are separated to achieve the clean sand discharge standard.

[0004] However, the cyclone grit chamber needs to be discharged after accumulating a large amount of mud and sand. The sand in the sand hopper is difficult to be pumped out due to compaction, and the air lifting pump often cannot effectively pump out the sand particles, resulting in poor efficiency of the cyclone grit chamber during the sand discharge process. Therefore, how to improve the sand discharge efficiency of the sand hopper of the cyclone grit chamber becomes a problem to be solved. SUMMARY

[0005] The technical problem to be solved by the present application is to provide a water conservancy pipe network sewage purification device and a control method, which avoids the problem of difficult pumping out due to compaction of mud and sand, and improves the sand discharge efficiency of the sand hopper of the cyclone grit chamber.

[0006] To solve the above technical problems, the present application is realized by the following technical scheme:

[0007] The application provides a water conservancy pipe network sewage purification device, a spiral flow grit chamber is provided with a grit portion, a sand hopper located below the grit portion, a fixed pipe arranged in the sand hopper, a plurality of first support rods horizontally and fixedly connected around the fixed pipe, a plurality of second support rods horizontally and fixedly connected around the fixed pipe, and the first support rods are located above the second support rods. Each first support rod is fixedly provided with an air pressure pipe, the air pressure pipe comprises a piston disc and a shaft rod fixedly connected with the piston disc, and a photoelectric distance detection module for sensing and detecting the distance of the piston disc is arranged on the top of the air pressure pipe.

[0008] A rotating connecting rod is movably connected to the lower end of the shaft rod of the air pressure pipe, the rotating connecting rod is provided with a rod body segment with vertical racks uniformly distributed on the side of the ring, the rotating connecting rod is provided with a smooth rod located below the vertical racks, and the smooth rod slides through the second support rods. The sand hopper is provided with a driving assembly, the driving assembly comprises a transverse driving device, the output end of the transverse driving device is connected with a transverse rod, and one side of the transverse rod towards the rotating connecting rod is provided with a toothed area matched with the vertical racks.

[0009] A sand scraping strip plate is fixedly connected to the lower end of the smooth rod, and a plurality of sand scraping cones are arranged on the bottom side of the sand scraping strip plate. The spiral flow grit chamber is provided with a suction pipe, the pipe body of the suction pipe is provided with vertically distributed suction holes on the side of the ring, the suction pipe is provided with a flow pump and a turbidity detection module, the suction pipe is connected with a backflow pipe and a drainage pipe located downstream of the turbidity detection module, the backflow pipe is communicated with the sand hopper, the backflow pipe is provided with a backflow valve, and the drainage pipe is provided with a drainage valve. In addition, the first support rod is fixedly provided with a liquid level distance sensor for monitoring the liquid level downwards.

[0010] As a preferred technical scheme of the device, the second support rod is provided with a sliding sleeve, and the smooth rod of the rotating connecting rod movably passes through the sliding sleeve.

[0011] As a preferred technical scheme of the device, the lower end of the shaft rod is provided with a movable end with a downward opening, the upper end of the rotating connecting rod is provided with a rotating connecting end arranged at the opening structure position of the movable end, and in addition, the movable end is provided with a roller structure in rolling cooperation with the rotating connecting end.

[0012] As a preferred technical scheme of the device, a plurality of fixed guide frames are fixedly arranged on the side of the fixed pipe, the fixed guide frames are provided with guide notches, the transverse rod is movably arranged in the guide notches, and in addition, the guide notches are provided with guide rollers matched with the transverse rod.

[0013] As a preferred technical scheme of the device, the length of the sand scraping strip plate is L a , the horizontal width of the sand hopper is D, and D / 3 a <2D / 5, and in addition, the sand scraping strip plate is further embedded with a counterweight.

[0014] The application provides a water conservancy pipe network sewage purification device control method, which comprises the following steps:

[0015] S1. When the flow inlet and flow outlet of the cyclone grit chamber normally conduct liquid flow, the air pressure pipe is in a negative pressure state, and the piston disc is at the highest position inside the air pressure pipe.

[0016] S2. After the flow inlet and flow outlet of the cyclone grit chamber stop conducting liquid flow, the cyclone grit chamber enters a "sand discharge" mode.

[0017] S3. The air pressure pipe releases the internal air pressure, the piston disc freely moves inside the air pressure pipe, the sand scraping strip plate is lowered to the top of the sand surface of the sand hopper under the weight, the photoelectric distance detection module detects the distance of the piston disc at this time, and the control system analyzes the total thickness of the sand surface of the sand hopper at this time.

[0018] S4. The transverse driving device drives the transverse rod to make reciprocating motion, the toothed edge area of the transverse rod drives the rotary connecting rod to make forward and reverse motion, the sand scraping cone on the bottom side of the sand scraping strip plate scrapes the upper surface area of the mud sand, at the same time, the flow pump is started, the discharge valve is opened, the backflow valve is closed, and the mud sand mixed liquid scraped by the sand scraping strip plate enters the suction pipe through the suction hole of the suction pipe.

[0019] S5. The turbidity detection module detects the real-time turbidity of the mud sand mixed liquid: if the real-time turbidity φ X of the mud sand mixed liquid is not lower than the lowest turbidity reference value φ min preset by the system, the mud sand mixed liquid is directly discharged through the discharge pipe. If the real-time turbidity φ X of the mud sand mixed liquid is lower than the lowest turbidity reference value φ min preset by the system, the backflow valve is opened and the discharge valve is closed, and the mud sand mixed liquid is backflowed to the sand hopper through the backflow pipe.

[0020] S6. When the liquid level distance sensor senses that the liquid level is lower than the position of the liquid level distance sensor, the liquid level distance sensor senses the real-time liquid level information, which is recorded as W m . The control system obtains the distance information detected by all photoelectric distance detection modules in real time, judges the thickness information of the mud sand surface in the sand hopper, and records the thickness information as {h1, h2, h3,..., h n}.

[0021] S7. The control system presets the parameter corresponding relationship between the liquid level W and the thickness h of the mud sand surface: F(W)~F(h), that is, each thickness parameter of the mud sand surface corresponds to a liquid level parameter. According to the real-time liquid level information W m , the corresponding thickness h s of the mud sand surface is output.

[0022] When any one parameter h n in {h1, h2, h3,..., h x} is greater than the thickness h of the mud sand surface, the control system controls the transverse driving device to drive the transverse rod to make reciprocating motion, the toothed edge area of the transverse rod drives the rotary connecting rod to make forward and reverse motion, the sand scraping cone on the bottom side of the sand scraping strip plate scrapes the upper surface area of the mud sand, at the same time, the flow pump is started, the discharge valve is opened, the backflow valve is closed, and the mud sand mixed liquid scraped by the sand scraping strip plate enters the suction pipe through the suction hole of the suction pipe.s Then the thickness parameter of the sludge is greater than h s The air pressure pipe inside the sludge position directly above starts to increase the pressure, and the pressure increasing strength is △P, then F(△P)∝F(△h). Wherein, F(△P) is the parameter quantity of the increased air pressure of the air pressure pipe, F(△h) is the parameter quantity of the sludge overheight, △h=h x -h s .

[0023] In addition, the transverse driving device completes one reciprocating action of advancing and retreating the transverse rod, stops for a certain time △T, and then the transverse driving device starts to advance and retreat the transverse rod again. Wherein, △T is the stop reference time preset by the control system.

[0024] Compared with the prior art, the beneficial effects of the present application are:

[0025] The present application is configured with a sand scraping strip plate and a sand scraping cone on the upper surface of the sand in the sand bucket, a transverse driving device is designed to drive the transverse rod to move back and forth, drive the rotating connecting rod to rotate, thereby driving the sand scraping strip plate and the sand scraping cone to rotate, and the sludge combined together is scraped layer by layer, and the sludge is discharged through the suction pipe and the suction hole, and the turbidity of the discharged mixed liquid is monitored to ensure the concentration of the real-time discharged sludge (avoiding less sludge in the discharged mixed liquid), and the remaining thickness of the sludge is detected in real time by the photoelectric distance detection module, the remaining liquid level is monitored and judged by the liquid level distance sensor, the scraping force of the sand scraping strip plate is increased, the scraping of the sludge at the overheight position is accelerated, the sludge and the liquid level are lowered, and when the liquid level cannot continue to discharge, the scraping and discharge of the sludge are basically completed, avoiding the problem of difficult pumping and discharge due to the compaction of the sludge, and improving the sand discharge efficiency of the cyclone grit chamber. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is the overall schematic diagram of the device and equipment of the present application.

[0027] Figure 2 It is the schematic diagram of the partial enlargement of A in the present application. Figure 1

[0028] Figure 3 It is the schematic diagram of the partial enlargement of B in the present application. Figure 1

[0029] Figure 4 It is the distribution schematic diagram of the sand scraping cone at the bottom of the sand scraping strip plate in the present application.

[0030] ​​Wherein: 1-fixed tube; 2-first support rod; 3-second support rod, 301-sliding sleeve; 4-air pressure pipe, 401-piston disc, 402-shaft, 403-moving end, 404-roller structure, 405-photoelectric distance detection module; 5-rotary connecting rod, 501-smooth rod, 502-rotary connecting end, 503-vertical rack; 6-driving assembly, 601-transverse driving device, 602-transverse rod, 603-toothed area, 604-fixed guide frame, 6041-guide notch, 6042-guide roller; 7-sand scraping strip, 701-sand scraping cone, 702-counterweight; 8-suction pipe, 801-suction hole; 9-backflow pipe; 10-drainage pipe; 11-flow pump; 12-turbidity detection module; 13-backflow valve; 14-drainage valve; 15-liquid level distance sensor; 16-sand setting part; 17-sand hopper; 18-motor with gearbox; 19-transmission gear box; 20-outlet; 21-inlet; 22-hollow rotating shaft; 23-impeller; 24-liquid level surface; 25-mud and sand surface. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0032] Example one, the present application relates to water pipe network sewage purification device, mainly for the mud and sand in the sand hopper of the cyclone sand trap is not easy to be directly pumped out of the innovative design, its main structure as follows:

[0033] Please refer to Figure 1 , the cyclone sand trap is provided with a sand setting part 16 and a sand hopper 17 located below the sand setting part 16. The sand setting part 16 is provided with an inlet 21 and an outlet 20. The bottom of the sand setting part 16 is provided with an impeller 23. The sand setting part 16 is provided with a motor with gearbox 18 on the upper side. A transmission gear box 19 is also provided. The sand setting part 16 is provided with a hollow rotating shaft 22 connected with the transmission gear box 19. The lower end of the hollow rotating shaft 22 is also provided with the impeller 23. The sand hopper is provided with a fixed tube 1, a plurality of first support rods 2 distributed in a horizontal ring shape, and a plurality of second support rods 3 distributed in a horizontal ring shape. The plurality of first support rods 2 are fixedly connected around the fixed tube 1. The plurality of second support rods 3 are fixedly connected around the fixed tube 1. The first support rods 2 are located above the second support rods 3. The first support rods 2 are fixedly provided with a liquid level distance sensor 15 for monitoring the liquid level downward. Each first support rod 2 is fixedly provided with an air pressure pipe 4. The air pressure pipe 4 is suspendedly connected with a rotary connecting rod 5 below. The rotary connecting rod 5 is connected with a sand scraping strip 7 below.

[0034] The vortex grit chamber is also provided with a driving assembly 6 and a flow suction pipe 8. The flow suction pipe 8 is inserted into the sand pot and is provided with vertically distributed flow suction holes 801 on the pipe body ring side. The flow suction pipe 8 is provided with a flow pump 11 and a turbidity detection module 12. The flow suction pipe 8 is connected with a backflow pipe 9 and a flow discharge pipe 10 located downstream of the turbidity detection module 12. The backflow pipe 9 is communicated with the sand pot and is provided with a backflow valve 13. The flow discharge pipe 10 is provided with a flow discharge valve 14.

[0035] Please refer to Figure 2 , the air pressure pipe 4: piston disc 401, shaft rod 402, photoelectric distance detection module 405, the shaft rod 402 is fixedly connected with the piston disc 401, and the photoelectric distance detection module 405 is embedded at the top of the air pressure pipe 4. The photoelectric distance detection module 405 senses and detects the distance on the top side of the piston disc 401.

[0036] Please refer to Figure 1 、 Figure 2 , the shaft rod 402 is provided with a movable end 403 at the lower side end. The movable end 403 is downwardly open. The upper side end of the rotary connecting rod 5 is provided with a rotating connection end 502 installed at the opening structure position of the movable end 403. In addition, the movable end 403 is provided with a roller structure 404. Through the roller structure 404, the rotating connection end 502 can freely rotate in the movable end 403.

[0037] Please refer to Figure 1 、 Figure 3 , the rotary connecting rod 5 is provided with a rod body section uniformly distributed with vertical splines 503 on the ring side. The rotary connecting rod 5 is provided with a smooth rod 501 located at the lower side of the vertical splines 503. The second support rod 3 is provided with a sliding sleeve 301. The smooth rod 501 of the rotary connecting rod 5 is movably inserted through the sliding sleeve 301. A rotating structure such as a bearing is further arranged between the periphery of the sliding sleeve 301 and the second support rod 3.

[0038] Please refer to Figure 3 , the driving assembly 6 includes a transverse driving device 601. The transverse driving device 601 can adopt a cylinder device. The output end of the transverse driving device 601 is connected with a transverse rod 602. The transverse rod 602 is provided with a section of toothed area 603 on the side surface facing the rotary connecting rod 5. The toothed area 603 is matched with the vertical splines 503. The toothed area 603 moves transversely, and the vertical splines 503 rotate.

[0039] A plurality of fixed guide frames 604 are fixedly installed on the ring side of the fixed pipe 1. The fixed guide frames 604 are provided with guide notches 6041. The transverse rod 602 is movably inserted at the position of the guide notches 6041. In addition, a guide roller 6042 is arranged in the guide notches 6041. The guide roller 6042 is used for guiding and supporting the transverse rod 602.

[0040] The lower end of the smooth rod 501 is fixedly connected with a sand scraping strip plate 7. The length of the sand scraping strip plate 7 should not be too small, but is limited by the position of the suction pipe 8 in the sand tank, and also cannot be too large, otherwise it is difficult to start. In the possible range, the rotation coverage of the sand scraping strip plate 7 is increased. The length L of the sand scraping strip plate 7 a , the horizontal width of the sand tank is D, then D / 3<L a <2D / 5.

[0041] The sand scraping strip plate 7 is also embedded with a counterweight 702, which is combined with Figure 3 、 Figure 4 The bottom side of the sand scraping strip plate 7 is provided with a plurality of staggered sand scraping cones 701.

[0042] Embodiment two, the present application relates to a kind of water conservancy pipe network sewage purification device control method, comprising the following steps:

[0043] First, when the flow inlet and the flow outlet of the cyclone grit chamber normally carry out liquid flow, the air pressure pipe 4 is in a negative pressure state, the piston disc 401 is in the highest position inside the air pressure pipe 4, so that the sand scraping strip plate is also in the highest position of its vertical stroke.

[0044] Then, after the flow inlet and the flow outlet of the cyclone grit chamber stop carrying out liquid flow, the cyclone grit chamber enters the "sand discharge" mode, and the following is the control process of the "sand discharge" mode:

[0045] First, the air pressure pipe 4 releases the internal air pressure, the piston disc 401 freely moves in the air pressure pipe, the sand scraping strip plate 7 is lowered to the top of the sand tank mud surface under the weight, the photoelectric distance detection module 405 detects the distance of the piston disc 401 at this time, and the control system analyzes the total thickness of the sand tank mud at this time. For example, the distance between the photoelectric distance detection module 405 and the sand tank bottom plate is L1, the distance between the top side of the piston disc 401 and the bottom side of the sand scraping strip plate 7 is L2, and the photoelectric distance detection module 405 detects the distance of the top side of the piston disc 401 is L x , then the total thickness of the mud at this time is L1-L2-L x .

[0046] In the second step, the lateral drive device 601 drives the lateral rod 602 to move back and forth. The toothed area 603 of the lateral rod 602 drives the rotating connecting rod 5 to move in both directions. The lateral drive device 601 pushes the lateral rod 602 forward, and the toothed area 603 of the lateral rod 602 drives the rotating connecting rod 5 to rotate counterclockwise (from a top-down perspective). The lateral drive device 601 pushes the lateral rod 602 backward, and the toothed area 603 of the lateral rod 602 drives the rotating connecting rod 5 to rotate clockwise. The scraping cone 701 on the bottom side of the scraping blade 7 scrapes the upper surface area of ​​the mud and sand. At the same time, the flow pump 11 is started, the drain valve 14 is opened, and the return valve 13 is closed. The mud and sand mixture scraped by the scraping blade 7 enters the suction pipe 8 through the suction hole 801 of the suction pipe 8.

[0047] The third step involves the turbidity detection module 12 detecting the turbidity of the mud-sand mixture in real time. For example, the turbidity detection module 12 uses photoelectric detection to detect the mud and sand content of the mud-sand mixture.

[0048] Scenario 1: If the real-time turbidity φ of the mud-sand mixture is... X Not lower than the system's preset minimum turbidity reference value φ min Then it is discharged directly through the drain pipe 10.

[0049] Scenario 2: If the real-time turbidity φ of the mud-sand mixture... X Lower than the system's preset minimum turbidity reference value φ min Then, the drain valve 14 closes and the return valve 13 opens, and the sand flows back into the sand hopper through the return pipe 9.

[0050] Fourth step: When the liquid level distance sensor 15 detects that the liquid level is lower than the position of the liquid level distance sensor 15 (when the liquid level is higher than the liquid level distance sensor 15, the liquid level distance sensor 15 cannot detect the liquid level downwards; when the liquid level is lower than the liquid level distance sensor 15, the liquid level distance sensor 15 can detect the liquid level downwards), the liquid level distance sensor 15 detects the real-time liquid level information, denoted as W. m The control system acquires the distance information detected in real time by all photoelectric distance detection modules 405, and determines the thickness information of the mud and sand surface in the sand hopper: denoted as {h1, h2, h3, ..., h...} n}

[0051] Step 5: Establish the parameter correspondence between the preset liquid level W and the mud / sand surface thickness h in the control system.

[0052] F(W)~F(h), that is, each mud and sand surface thickness parameter corresponds to a liquid level parameter.

[0053] According to real-time liquid level information W m Output the corresponding mud and sand surface thickness h s When {h1, h2, h3, ..., hn} any one of the parameters h x greater than the thickness h of the silt surface s then the silt surface thickness parameter is greater than h s The air pressure pipe 4 above the silt position starts to increase in pressure, and the increase in pressure is △P, so F(△P)∝F(△h).

[0054] Wherein, F(△P) is the parameter amount of the increased air pressure of the air pressure pipe 4, F(△h) is the parameter amount of the silt overheight, △h=h x -h s For example, when the real-time liquid level is 2.7m, the corresponding silt surface thickness is 0.6m, and at this time there is a silt surface thickness of 0.7m, then the air pressure pipe 4 above this silt position increases the air pressure (originally there is no additional pressure, and the piston disc 401 and the silt scraping strip plate 7 can freely ascend and descend), and the silt overheight is 0.1m, and the air pressure pipe 4 needs to increase 0.05MPa, that is, 0.5atmospheric pressure value, and the greater the silt overheight, the greater the air pressure that the air pressure pipe 4 needs to increase downward to the piston disc 401, so that the current position can be quickly “scraped” to remove the silt, so that the current position silt can be quickly removed with the mixed liquid. In this way, when the liquid descends to the uppermost position of the flow inlet hole 801, the silt surface has also reached the bottom, although there is still some mixed liquid with silt, but after the silt settles, the amount of silt is not much, and the cyclone grit chamber can be put into use again, and the flow inlet and the flow outlet are opened to continue normal operation.

[0055] When the transverse driving device 601 drives and outputs, the transverse driving device 601 completes one round trip of forward and backward movement of the transverse rod 602, stops for a certain time △T, and then the transverse driving device 601 starts again to move the transverse rod 602 forward and backward in a round trip;

[0056] Wherein, △T is a stop reference time preset by the control system, after the transverse driving device 601 completes one round trip of forward and backward movement of the transverse rod 602, the silt scraping strip plate 7 has been reversed many times, and the silt surface has been scraped with a lot of silt, so that these silt can “escape” and be “absorbed” by the mixed liquid flow, which all need a certain time, and during this time, the silt scraping strip plate 7 can also complete further “sinking” to continue to “scrape” the silt layer.

[0057] The above only describes the preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A water conservancy pipe network sewage purification device, comprising a spiral flow grit chamber, the spiral flow grit chamber is provided with a grit portion and a sand bucket below the grit portion, and characterized in that: a fixed pipe (1) is arranged in the sand bucket, a plurality of first support rods (2) are horizontally and fixedly connected around the fixed pipe (1), and a plurality of second support rods (3) are horizontally and fixedly connected around the fixed pipe (1), and the first support rods (2) are located above the second support rods (3); a gas pressure pipe (4) is fixedly installed on each first support rod (2), the gas pressure pipe (4) comprises a piston disc (401) and a shaft rod (402) fixedly connected with the piston disc (401), and an optical distance detection module (405) for sensing and detecting the distance of the piston disc (401) is arranged on the top of the gas pressure pipe (4); a rotating connecting rod (5) is movably connected to the lower end of the shaft rod (402) of the gas pressure pipe (4), the rotating connecting rod (5) is provided with a rod body section with vertical racks (503) uniformly distributed on the ring side, the rotating connecting rod (5) is provided with a smooth rod (501) located below the vertical racks (503), and the smooth rod (501) slides through the second support rods (3); the sand bucket is provided with a driving assembly (6), the driving assembly (6) comprises a transverse driving device (601), the transverse driving device (601) is connected with a transverse rod (602) at the output end, and one side of the transverse rod (602) towards the rotating connecting rod (5) is provided with a toothed area (603) matched with the vertical racks (503); a sand scraping strip plate (7) is fixedly connected to the lower end of the smooth rod (501), and a plurality of staggered sand scraping cones (701) are arranged on the bottom side of the sand scraping strip plate (7); the spiral flow grit chamber is provided with a suction pipe (8), the suction pipe (8) is provided with vertically distributed suction holes (801) on the pipe body ring side of the sand bucket, the suction pipe (8) is provided with a flow pump (11) and a turbidity detection module (12), the suction pipe (8) is connected with a backflow pipe (9) located downstream of the turbidity detection module (12) and a drainage pipe (10), the backflow pipe (9) communicates with the sand bucket, the backflow pipe (9) is provided with a backflow valve (13), and the drainage pipe (10) is provided with a drainage valve (14); in addition, the first support rods (2) are fixedly installed with liquid level distance sensors (15) for monitoring the liquid level downwards.

2. The water conservancy pipe network sewage purification device according to claim 1, characterized in that: the second support rods (3) are provided with sliding sleeves (301), and the smooth rod (501) of the rotating connecting rod (5) movably passes through the sliding sleeves (301).

3. The water conservancy pipe network sewage purification device according to claim 1, characterized in that: the lower end of the shaft rod (402) is provided with a movable end (403) with an opening downwards, the upper end of the rotating connecting rod (5) is provided with a rotating connection end (502) installed at the opening structure position of the movable end (403), and in addition, the movable end (403) is provided with a roller structure (404) in rolling connection with the rotating connection end (502).

4. The water conservancy pipe network sewage purification device according to claim 1, characterized in that: The fixed pipe (1) ring side is fixedly provided with a plurality of fixed guide frames (604), the fixed guide frame (604) is provided with a guide gap (6041), the transverse rod (602) is movably inserted at the position of the guide gap (6041), in addition, the guide gap (6041) is provided with a guide roller (6042) matched with the transverse rod (602).

5. The water conservancy pipe network sewage purification device according to claim 1, characterized in that: Suppose the length of the sand scraping strip plate (7) is L a , and the horizontal width of the sand bucket is D, then D / 3 < L a <2D / 5; in addition, the sand scraping strip plate (7) is also embedded with a counterweight (702).

6. A control method of a waterworks pipe network sewage purification device, characterized by, The water conservancy pipe network sewage purification device of any one of claims 1 to 5 comprises the following steps: S1. When the flow inlet and the flow outlet of the cyclone grit chamber normally carry out liquid flow, the air pressure pipe (4) is in a negative pressure state, and the piston disc (401) is at the highest position inside the air pressure pipe (4); S2. After the flow inlet and the flow outlet of the cyclone grit chamber stop carrying out liquid flow, the cyclone grit chamber enters a "sand discharge" mode; S3. The air pressure pipe (4) releases the internal air pressure, the piston disc (401) freely moves inside the air pressure pipe, the sand scraping strip plate (7) is lowered to the top of the sand pit mud surface under the weight, the photoelectric distance detection module (405) detects the distance of the piston disc (401) at this time, and the control system analyzes the total thickness of the mud sand in the sand pit at this time; S4. The transverse driving device (601) drives the transverse rod (602) to make reciprocating motion, the toothed portion (603) of the transverse rod (602) drives the rotary connecting rod (5) to make forward and reverse rotation, the sand scraping cone (701) on the bottom side of the sand scraping strip plate (7) scrapes the surface area of the mud sand, at the same time, the flow pump (11) is started, the discharge valve (14) is opened, the backflow valve (13) is closed, and the mud sand mixed liquid scraped by the sand scraping strip plate (7) enters the suction pipe (8) through the suction hole (801) of the suction pipe (8); S5. The turbidity detection module (12) detects the turbidity of the mud sand mixed liquid in real time; If the real-time turbidity φ of the sludge and sand mixture X is not lower than the lowest turbidity reference value φ preset by the system min , it is directly discharged through the drainage pipe (10); If the real-time turbidity φ of the slurry mixture is greater than the preset maximum turbidity reference value φ X and less than the preset minimum turbidity reference value φ min , the drain valve (14) is closed and the return valve (13) is opened, and the slurry is returned to the sand tank through the return pipe (9); S6. When the liquid level distance sensor (15) senses that the liquid level is lower than the position where the liquid level distance sensor (15) is located, the liquid level distance sensor (15) senses the real-time liquid level information, denoted as W m ; The control system acquires distance information detected by all photoelectric distance detection modules (405) in real time, judges thickness information of the sand surface in the sand hopper: denoted as {h1, h2, h3,..., hn}. n} S7. The control system predefines the parameter corresponding relationship between the liquid level W and the mud sand surface thickness h: F(W)~F(h), that is, each mud sand surface thickness parameter corresponds to a liquid level parameter; According to the real-time liquid level information W m , the corresponding mud face thickness h s is output. When {h1, h2, h3,..., h n} exists any one parameter h x greater than the thickness of the silt surface h s , then the silt surface thickness parameter is greater than h s The air pressure pipe (4) directly above the silt position starts to increase in pressure, and the increase in pressure is △P, so F(△P)∝F(△h); Wherein, F(△P) is the parameter quantity of the increased air pressure of the air pressure pipe (4), F(△h) is the parameter quantity of the mud sand super height, △h=h x -h s .

7. The control method of a water conservancy pipe network sewage purification device according to claim 6, characterized in that: After the transverse driving device (601) completes the forward and backward reciprocating motion of the transverse rod (602), it is stalled for a certain time ΔT, and then the transverse driving device (601) starts the forward and backward reciprocating motion of the transverse rod (602) again. Wherein, ΔT is the stall reference time preset by the control system.

Images