Unpowered rural domestic sewage treatment oxygenation and aeration structure

Abstract

The utility model discloses an unpowered rural domestic sewage treatment oxygenation and aeration structure, and aims to overcome the defects of high cost, high energy consumption and inconvenience in maintenance when an aeration device is mounted at the bottom of a biological treatment tank for aeration operation. The two ends of the mixing pipe are respectively connected with a water inlet pipe and a water outlet pipe; the water outlet pipe is inserted into a biological treatment tank; the water inlet pipe is connected to a high-position regulating tank; a height difference exists between the high-position regulating tank and the biological treatment tank; a plurality of air inlet holes are axially formed in the air inlet section at intervals, the air inlet section is sleeved with a movable adjusting sleeve, and the adjusting sleeve can cover the air inlet holes. The unpowered rural domestic sewage treatment oxygenation and aeration structure does not need to be driven by power equipment, and is simple in structure, low in cost and convenient to maintain.

Description

Technical Field

[0001] The utility model relates to sewage treatment technology, and more specifically, to an oxygenation and aeration structure for treating rural domestic sewage without power. Background Art

[0002] At present, there are various rural sewage treatment technologies at home and abroad. By treating rural sewage, the rural living environment is improved, and prominent environmental problems such as "villages surrounded by garbage" and rural black and smelly water bodies are steadily solved. Taking the town government seats and central villages as the key points, rural domestic sewage treatment is promoted in a hierarchical manner, and the comprehensive renovation of rural water systems is promoted. In actual sewage treatment, the contact oxidation process is usually adopted. The common method is to install an aeration device at the bottom of the biological treatment tank, which requires a blower, connecting pipelines, and an aeration disk (pipe), etc. This method has a high cost, and it is not convenient to maintain once the underwater aeration device fails. Content of the Utility Model

[0003] In order to overcome the above deficiencies, the utility model provides an oxygenation and aeration structure for treating rural domestic sewage without power, which does not require a power device to drive, has a simple structure, low cost, and is convenient for maintenance.

[0004] To solve the above technical problems, the utility model adopts the following technical scheme: an oxygenation and aeration structure for treating rural domestic sewage without power, including a mixing pipe. The two ends of the mixing pipe are respectively connected to a water inlet pipe and a water outlet pipe. The water outlet pipe is inserted into the biological treatment tank, and the water inlet pipe is connected to a high-level regulating tank. There is a height difference between the high-level regulating tank and the biological treatment tank. A jet pipe is installed in the mixing pipe, and the jet pipe is communicated with the water inlet pipe. An air inlet section is arranged on the mixing pipe, and a number of air inlet holes are axially spaced on the air inlet section. The air inlet section is sleeved with an adjustable sleeve that can move, and the adjustable sleeve can cover the air inlet holes.

[0005] During use, the mixing pipe is installed and fixed on the biological treatment tank, the water inlet pipe is connected to the high-level regulating tank, and the water outlet pipe is inserted into the biological treatment tank. During operation, the water flow in the high-level regulating tank flows downward from the water inlet pipe and is ejected into the mixing pipe from the jet pipe. The ejected water flow flows out from the water outlet pipe into the biological treatment tank. The flow of the water makes a negative pressure generated in the air inlet section of the mixing pipe, and air flows into the mixing pipe from the air inlet holes and mixes with the water flow in the mixing pipe to form a water-air mixture. The water-air mixture flows out from the water outlet pipe into the biological treatment tank, increasing the oxygen content and achieving an aeration effect.

[0006] There is a height difference between the high-level regulating tank and the biological treatment tank, which provides water pressure for the water flow in the water inlet pipe without the need for an additional power device to provide power. The adjustable sleeve moves up and down to adjust the number of exposed water inlet holes and the number of covered water inlet holes, thereby adjusting the air intake volume and realizing the adjustment of the aeration oxygen content. This oxygenation and aeration structure for treating rural domestic sewage without power does not require a power device to drive, has a simple structure, low cost, and is convenient for maintenance.

[0007] Preferably, the air inlet holes are inclined downward from top to bottom in the axial direction of the mixing tube.

[0008] The inclined arrangement of the air inlet holes is beneficial to air intake.

[0009] Preferably, a gas mixing mesh plate is arranged below the jet pipe in the mixing tube, and fine mesh holes are densely distributed on the gas mixing mesh plate.

[0010] The water-air mixture passes through the gas mixing mesh plate, which helps to break up the bubbles. The tiny bubbles are further evenly mixed with the water, improving the sewage treatment effect.

[0011] Preferably, a bracket is installed in the mixing tube, a rotating shaft is installed on the bracket, an impeller is installed on the upper part of the rotating shaft, and the gas mixing mesh plate is connected to the lower part of the rotating shaft.

[0012] The water flow in the mixing tube can drive the impeller to rotate, so that the gas mixing mesh plate and the rotating shaft rotate together. The rotation of the impeller can break up the bubbles and make the bubbles and water evenly mixed. The rotating gas mixing mesh plate has a good effect on breaking up the bubbles and makes the mixing of bubbles and water more uniform.

[0013] Preferably, the gas mixing mesh plate is inclined, and the rotating shaft and the gas mixing mesh plate are eccentrically arranged.

[0014] The eccentric and inclined arrangement of the gas mixing mesh plate not only reduces the resistance to the water flow, but also improves the effect of breaking up the bubbles.

[0015] Preferably, a throat section is arranged below the air intake section in the mixing tube. The inner diameter of the throat section is smaller than that of the air intake section. The section between the air intake section and the throat section in the mixing tube is a contraction section, and the section between the throat section and the water outlet pipe in the mixing tube is a diffusion section.

[0016] The arrangement of the contraction section, the throat section and the diffusion section in the mixing tube is beneficial to the generation of negative pressure in the air intake section and the discharge of the water-air mixture.

[0017] Preferably, the upper end of the mixing tube is tightly connected to a water inlet joint. The water inlet pipe is connected to the water inlet joint, and the jet pipe is arranged on the water inlet joint.

[0018] The arrangement of the water inlet joint facilitates the layout of the jet pipe and the connection of the water inlet pipe.

[0019] Preferably, a conical mesh plate with a smaller upper part and a larger lower part is arranged in the mixing tube, and fine mesh holes are densely distributed on the conical mesh plate.

[0020] The contact area between the conical mesh plate and the water flow is large, and the effect of breaking up the bubbles is good, making the mixing of the bubbles and the water flow more uniform.

[0021] Preferably, the water outlet pipe is a single pipe and is directly connected to the lower end of the mixing tube.

[0022] Adopt a single outlet pipe, with a large impact force of the discharged water flow and not easy to be blocked.

[0023] In another solution, the lower end of the mixing pipe is fixedly connected to the water outlet joint, and a plurality of water outlet nozzles are arranged on the water outlet joint. A plurality of outlet pipes are respectively connected to the corresponding plurality of water outlet nozzles.

[0024] Adopt a plurality of outlet pipes, extend the outlet pipes to different positions in the biological treatment tank, with a large aeration range and more uniform aeration, which is beneficial to improving the aeration effect.

[0025] Compared with the prior art, the beneficial effects of the present utility model are as follows: (1) The oxygenation aeration structure for rural domestic sewage treatment without power does not require a power device to drive, has a simple structure, low cost, and is convenient for maintenance; (2) The intake air volume of the air in the mixing pipe can be adjusted to realize the adjustment of the oxygen content in the aeration and ensure the sewage treatment effect; (3) The water-air mixture passes through the air mixing grid plate, which helps to break up the bubbles, and the tiny bubbles are further uniformly mixed with the water to improve the sewage treatment effect; (4) The air mixing grid plate is inclined and rotates eccentrically, improving the bubble breaking effect and making the bubbles and water flow mix more evenly. Description of the Drawings

[0026] Figure 1 It is a cross-sectional view of Embodiment 1 of the present utility model.

[0027] Figure 2 It is a cross-sectional view of Embodiment 2 of the present utility model.

[0028] Figure 3 It is a cross-sectional view of Embodiment 3 of the present utility model.

[0029] Figure 4 It is a cross-sectional view of Embodiment 4 of the present utility model.

[0030] In the figure: 1. mixing pipe, 2. inlet pipe, 3. outlet pipe, 4. jet pipe, 5. inlet joint, 6. convex edge, 7. intake section, 8. intake hole, 9. adjusting sleeve, 10. limit block, 11. air mixing grid plate, 12. throat section, 13. contraction section, 14. diffusion section, 15. water outlet joint, 16. water outlet nozzle, 17. pressure accumulation tank, 18. conical grid plate, 19. bracket, 20. rotating shaft, 21. impeller. Detailed Embodiments

[0031] The following are specific embodiments, and in combination with the drawings, the technical solutions of the present utility model will be further specifically described:

[0032] Embodiment 1: An oxygenation aeration structure for rural domestic sewage treatment without power (see the attached Figure 1),(including a mixing pipe 1, with the two ends of the mixing pipe 1 respectively connected to a water inlet pipe 2 and a water outlet pipe 3. The water outlet pipe 3 is inserted into a biological treatment tank, and the water inlet pipe 2 is connected to a high-level regulating tank. There is a height difference between the high-level regulating tank and the biological treatment tank, and this height difference provides pressure for the water flow in the water inlet pipe 2, enabling the water flow to have a stable water pressure without the need for additional equipment to drive it. A jet pipe 4 is installed in the mixing pipe 1, and the jet pipe 4 is communicated with the water inlet pipe 2.)

[0033] The upper end of the mixing pipe 1 is fixedly connected to a water inlet joint 5, the water inlet pipe 2 is connected to the water inlet joint 5, and the jet pipe 4 is arranged on the water inlet joint 5. A flange 6 is arranged on the water inlet joint 5, the lower part of the water inlet joint 5 is closely inserted into the upper end opening of the mixing pipe 1, the flange 6 is supported on the upper end of the mixing pipe 1, and the flange 6 and the upper end of the mixing pipe 1 are fixedly connected by screws.)

[0034] An air inlet section 7 is arranged on the mixing pipe 1. The air inlet section 7 is arranged on the upper part of the mixing pipe 1. A number of air inlet holes 8 are axially spaced on the air inlet section 7. The air inlet holes 8 are axially spaced in several circles, and several are evenly distributed in each circle. The air inlet section 7 is sleeved with an adjustable sleeve 9 that can move, and the adjustable sleeve 9 can cover the air inlet holes 8. External threads are arranged on the outer wall of the air inlet section 7, internal threads are arranged on the inner wall of the adjustable sleeve 9, and the adjustable sleeve 9 and the air inlet section 7 are threadedly connected. Rotating the adjustable sleeve 9 realizes the movement adjustment of the adjustable sleeve 9. The air inlet holes 8 are inclined downward from top to bottom towards the axial direction of the mixing pipe 1. A limiting block 10 is connected to the upper outer wall of the air inlet section 7, and the upper end of the adjustable sleeve 9 abuts against the limiting block 10 for limiting. At this time, the openings of the air inlet holes 8 at the lower part of the air inlet section 7 are exposed, enabling air intake.)

[0035] A gas mixing mesh plate 11 is arranged below the jet pipe 4 in the mixing pipe 1. The gas mixing mesh plate 11 is densely covered with fine mesh holes, and the gas mixing mesh plate 11 is fixedly installed in the mixing pipe 1. A throat section 12 is arranged below the air inlet section 7 in the mixing pipe 1. The inner diameter of the throat section 12 is smaller than the inner diameter of the air inlet section 7. A contraction section 13 is between the air inlet section 7 and the throat section 12 in the mixing pipe 1, and a diffusion section 14 is between the throat section 12 and the water outlet pipe 3 in the mixing pipe 1. The throat section 12 is in the shape of a cylindrical hole. The inner diameter of the contraction section 13 gradually decreases from top to bottom, and the inner diameter of the diffusion section 14 gradually increases from top to bottom. The open end of the jet pipe 4 is placed in the contraction section 13, and the gas mixing mesh plate 11 is arranged in the diffusion section 14. The water outlet pipe 3 is a single pipe, and the upper end of the water outlet pipe 3 is directly threadedly connected to the lower end of the mixing pipe 1.)

[0036] During use, the mixing pipe 1 is installed and fixed on the biological treatment tank. The water inlet pipe 2 is connected to the high-level regulating tank, and the water outlet pipe 3 is inserted into the biological treatment tank. During operation, the water flow in the high-level regulating tank flows downward from the water inlet pipe 2 and is ejected into the mixing pipe 1 from the jet pipe 4. The ejected water flow flows out from the water outlet pipe 3 into the biological treatment tank. The flow of the water creates a negative pressure in the air intake section 7 of the mixing pipe 1, and air flows into the mixing pipe 1 through the air intake holes 8 and mixes with the water flow in the mixing pipe 1 to form a water-air mixture. The water-air mixture flows out from the water outlet pipe 3 into the biological treatment tank, increasing the oxygen content and achieving the effect of aeration.

[0037] There is a height difference between the high-level regulating tank and the biological treatment tank, providing water pressure for the water flow in the water inlet pipe 2 without the need for additional power equipment. The adjusting sleeve 9 moves up and down to adjust the number of exposed water inlet holes and the number of covered water inlet holes, thereby adjusting the air intake volume and realizing the adjustment of the aeration oxygen content. This non-powered oxygenation and aeration structure for rural domestic sewage treatment has no need for power equipment drive, is simple in structure, low in cost, and convenient for maintenance.

[0038] Embodiment 2: A non-powered oxygenation and aeration structure for rural domestic sewage treatment (see the appendix Figure 2 ), including a mixing pipe 1. The two ends of the mixing pipe 1 are respectively connected to a water inlet pipe 2 and a water outlet pipe 3. The water outlet pipe 3 is inserted into the biological treatment tank, and the water inlet pipe 2 is connected to the high-level regulating tank. There is a height difference between the high-level regulating tank and the biological treatment tank, and this height difference provides pressure for the water flow in the water inlet pipe 2, enabling the water flow to have a stable water pressure without the need for additional equipment drive. A jet pipe 4 is installed in the mixing pipe 1, and the jet pipe 4 is communicated with the water inlet pipe 2.

[0039] The upper end of the mixing pipe 1 is tightly connected to a water inlet joint 5. The water inlet pipe 2 is connected to the water inlet joint 5, and the jet pipe 4 is arranged on the water inlet joint 5. A flange 6 is arranged on the water inlet joint 5. The lower part of the water inlet joint 5 is tightly inserted into the upper end opening of the mixing pipe 1, and the flange 6 is supported on the upper end of the mixing pipe 1. The flange 6 and the upper end of the mixing pipe 1 are tightly connected by screws.

[0040] An air intake section 7 is arranged on the mixing pipe 1. The air intake section 7 is arranged in the upper part of the mixing pipe 1. A number of air intake holes 8 are axially spaced on the air intake section 7. The air intake holes 8 are axially spaced in several circles, and several are evenly distributed in each circle. The air intake section 7 is sleeved with a movable adjusting sleeve 9, and the adjusting sleeve 9 can cover the air intake holes 8. External threads are arranged on the outer wall of the air intake section 7, and internal threads are arranged on the inner wall of the adjusting sleeve 9. The adjusting sleeve 9 and the air intake section 7 are threadedly connected, and the movement adjustment of the adjusting sleeve 9 is realized by rotating the adjusting sleeve 9. The air intake holes 8 are inclined downward and towards the axial direction of the mixing pipe 1. A limiting block 10 is connected to the upper outer wall of the air intake section 7. The upper end of the adjusting sleeve 9 abuts against the limiting block 10 for limiting. At this time, the openings of the air intake holes 8 at the lower part of the air intake section 7 are exposed, enabling air intake.

[0041] Below the jet pipe 4 in the mixing pipe 1, an air mixing grid plate 11 is arranged. The air mixing grid plate 11 is densely covered with fine mesh holes and is fixedly installed in the mixing pipe 1. Below the air inlet section 7 in the mixing pipe 1, a throat section 12 is arranged. The inner diameter of the throat section 12 is smaller than that of the air inlet section 7. Between the air inlet section 7 and the throat section 12 in the mixing pipe 1 is a contraction section 13. Between the throat section 12 and the water outlet pipe 3 in the mixing pipe 1 is a diffusion section 14. The throat section 12 is in the shape of a cylindrical hole. The inner diameter of the contraction section 13 gradually decreases from top to bottom, and the inner diameter of the diffusion section 14 gradually increases from top to bottom. The open end of the jet pipe 4 is placed in the contraction section 13, and the air mixing grid plate 11 is arranged in the diffusion section 14. The lower end of the mixing pipe 1 is tightly connected to a water outlet joint 15. The water outlet joint 15 is threadedly and tightly connected to the mixing pipe 1. A plurality of water outlet nozzles 16 are arranged on the water outlet joint 15, and a plurality of water outlet pipes 3 are respectively connected corresponding to the plurality of water outlet nozzles 16. A pressure accumulation groove 17 is arranged on the water outlet joint 15. The pressure accumulation groove 17 is communicated with the mixing pipe 1, and the water outlet nozzles 16 are arranged at the bottom of the pressure accumulation groove 17.

[0042] During use, the mixing pipe 1 is installed and fixed on the biological treatment tank. The water inlet pipe 2 is connected to the high-level regulating tank. A plurality of water outlet pipes 3 are inserted into different positions in the biological treatment tank to increase the aeration range. During operation, the water flow in the high-level regulating tank flows downward from the water inlet pipe 2 and is ejected into the mixing pipe 1 from the jet pipe 4. The ejected water flow flows out from the water outlet pipe 3 into the biological treatment tank. The flow of the water makes a negative pressure generated in the air inlet section 7 of the mixing pipe 1. Air flows from the air inlet holes 8 into the mixing pipe 1 and mixes with the water flow in the mixing pipe 1 to form a water-air mixture. The water-air mixture flows out from the water outlet pipe 3 into the biological treatment tank, increasing the oxygen content and achieving the effect of aeration.

[0043] There is a height difference between the high-level regulating tank and the biological treatment tank, providing water pressure for the water flow in the water inlet pipe 2 without the need for additional power equipment to provide power. The adjusting sleeve 9 moves up and down to adjust the number of exposed water inlet holes and the number of covered water inlet holes, thereby adjusting the air intake volume and realizing the adjustment of the aeration oxygen content. This unpowered oxygenation and aeration structure for rural domestic sewage treatment does not require a power equipment to drive, has a simple structure, low cost, and is convenient for maintenance.

[0044] Embodiment 3: An unpowered oxygenation and aeration structure for rural domestic sewage treatment (see the appendix Figure 3 ), which includes a mixing pipe 1. The two ends of the mixing pipe 1 are respectively connected to a water inlet pipe 2 and a water outlet pipe 3. The water outlet pipe 3 is inserted into the biological treatment tank, and the water inlet pipe 2 is connected to the high-level regulating tank. There is a height difference between the high-level regulating tank and the biological treatment tank, and this height difference provides pressure for the water flow in the water inlet pipe 2, enabling the water flow to have a stable water pressure without the need for additional equipment to drive. A jet pipe 4 is installed in the mixing pipe 1, and the jet pipe 4 is communicated with the water inlet pipe 2.

[0045] The upper end of the mixing tube 1 is fixedly connected to the water inlet joint 5. The water inlet pipe 2 is connected to the water inlet joint 5, and the jet pipe 4 is arranged on the water inlet joint 5. A flange 6 is arranged on the water inlet joint 5. The lower part of the water inlet joint 5 is closely inserted into the upper end opening of the mixing tube 1. The flange 6 is supported on the upper end of the mixing tube 1, and the flange 6 and the upper end of the mixing tube 1 are fixedly connected by screws.

[0046] An air inlet section 7 is arranged on the mixing tube 1. The air inlet section 7 is arranged on the upper part of the mixing tube 1. A number of air inlet holes 8 are axially spaced on the air inlet section 7. The air inlet holes 8 are axially spaced in several circles, and several are evenly distributed in each circle. The air inlet section 7 is sleeved with an adjustable sleeve 9 that can move. The adjustable sleeve 9 can cover the air inlet holes 8. External threads are arranged on the outer wall of the air inlet section 7, and internal threads are arranged on the inner wall of the adjustable sleeve 9. The adjustable sleeve 9 and the air inlet section 7 are threadedly connected, and the movement adjustment of the adjustable sleeve 9 is realized by rotating the adjustable sleeve 9. The air inlet holes 8 are inclined downward from top to bottom in the direction close to the axial direction of the mixing tube 1. A limit block 10 is connected to the upper outer wall of the air inlet section 7. The upper end of the adjustable sleeve 9 abuts against the limit block 10 for limiting. At this time, the openings of the air inlet holes 8 at the lower part of the air inlet section 7 are exposed, and air intake can be realized.

[0047] A gas mixing mesh plate 11 is arranged below the jet pipe 4 in the mixing tube 1. Fine mesh holes are densely distributed on the gas mixing mesh plate 11, and the gas mixing mesh plate 11 is fixedly installed in the mixing tube 1. A conical mesh plate 18 with a smaller upper part and a larger lower part is arranged in the mixing tube 1. Fine mesh holes are densely distributed on the conical mesh plate 18, and the conical mesh plate 18 is placed below the gas mixing mesh plate 11. The conical mesh plate 18 realizes the secondary breaking of the bubbles, further improving the breaking effect and enabling the bubbles to be fully and evenly mixed with the water flow. A throat section 12 is arranged below the air inlet section 7 in the mixing tube 1. The inner diameter of the throat section 12 is smaller than that of the air inlet section 7. A contraction section 13 is between the air inlet section 7 and the throat section 12 in the mixing tube 1, and a diffusion section 14 is between the throat section 12 and the water outlet pipe 3 in the mixing tube 1. The throat section 12 is in the shape of a cylindrical hole. The inner diameter of the contraction section 13 gradually decreases from top to bottom, and the inner diameter of the diffusion section 14 gradually increases from top to bottom. The open end of the jet pipe 4 is placed in the contraction section 13, and the gas mixing mesh plate 11 and the conical mesh plate 18 are both arranged in the diffusion section 14. The water outlet pipe 3 is a single pipe, and the upper end of the water outlet pipe 3 is directly threadedly connected to the lower end of the mixing tube 1.

[0048] During use, the mixing tube 1 is installed and fixed on the biological treatment tank. The water inlet pipe 2 is connected to the high-level regulating tank, and the water outlet pipe 3 is inserted into the biological treatment tank. During operation, the water flow in the high-level regulating tank flows downward from the water inlet pipe 2 and is ejected into the mixing tube 1 from the jet pipe 4. The ejected water flow flows out from the water outlet pipe 3 into the biological treatment tank. The flow of the water flow generates negative pressure in the air inlet section 7 of the mixing tube 1, and air flows into the mixing tube 1 from the air inlet holes 8 and is mixed with the water flow in the mixing tube 1 to form a water-air mixture. The water-air mixture flows out from the water outlet pipe 3 into the biological treatment tank, increasing the oxygen content and achieving the effect of aeration.

[0049] There is a height difference between the high-level regulating tank and the biological treatment tank, which provides water pressure for the water flow in the water inlet pipe 2 without the need for additional power equipment. The adjusting sleeve 9 moves up and down to adjust the number of exposed water inlet holes and the number of covered water inlet holes, thereby adjusting the air intake volume and realizing the adjustment of the aeration oxygen content. This non-powered oxygenation and aeration structure for rural domestic sewage treatment has no need for power equipment drive, has a simple structure, low cost, and is convenient for maintenance.

[0050] Embodiment 4: A non-powered oxygenation and aeration structure for rural domestic sewage treatment (see the appendix Figure 4 ), which includes a mixing pipe 1. The two ends of the mixing pipe 1 are respectively connected to a water inlet pipe 2 and a water outlet pipe 3. The water outlet pipe 3 is inserted into the biological treatment tank, and the water inlet pipe 2 is connected to the high-level regulating tank. There is a height difference between the high-level regulating tank and the biological treatment tank, and this height difference provides pressure for the water flow in the water inlet pipe 2, enabling the water flow to have a stable water pressure without the need for additional equipment drive. A jet pipe 4 is installed in the mixing pipe 1, and the jet pipe 4 is communicated with the water inlet pipe 2.

[0051] The upper end of the mixing pipe 1 is fixedly connected to a water inlet joint 5, the water inlet pipe 2 is connected to the water inlet joint 5, and the jet pipe 4 is arranged on the water inlet joint 5. A flange 6 is arranged on the water inlet joint 5. The lower part of the water inlet joint 5 is closely inserted into the upper end opening of the mixing pipe 1, and the flange 6 supports on the upper end of the mixing pipe 1. The flange 6 and the upper end of the mixing pipe 1 are fixedly connected by screws.

[0052] An air intake section 7 is arranged on the mixing pipe 1. The air intake section 7 is arranged in the upper part of the mixing pipe 1. A number of air intake holes 8 are axially spaced on the air intake section 7. The air intake holes 8 are axially spaced in several circles, and several are evenly distributed in each circle. The air intake section 7 is sleeved with a movable adjusting sleeve 9, and the adjusting sleeve 9 can cover the air intake holes 8. External threads are arranged on the outer wall of the air intake section 7, and internal threads are arranged on the inner wall of the adjusting sleeve 9. The adjusting sleeve 9 and the air intake section 7 are threadedly connected, and the movement adjustment of the adjusting sleeve 9 is realized by rotating the adjusting sleeve 9. The air intake holes 8 are inclined downward from top to bottom towards the axial direction of the mixing pipe 1. A limiting block 10 is connected to the upper outer wall of the air intake section 7, and the upper end of the adjusting sleeve 9 abuts against the limiting block 10 for limiting. At this time, the openings of the air intake holes 8 at the lower part of the air intake section 7 are exposed, enabling air intake.

[0053] A gas mixing grid plate 11 is arranged below the jet pipe 4 in the mixing pipe 1. The gas mixing grid plate 11 is densely covered with fine mesh holes and is fixedly installed in the mixing pipe 1. A support 19 is installed in the mixing pipe 1, a rotating shaft 20 is installed on the support 19, the rotating shaft 20 is rotatably arranged, an impeller 21 is installed on the upper part of the rotating shaft 20, and the gas mixing grid plate 11 is connected to the lower part of the rotating shaft 20. The gas mixing grid plate 11 is inclined, and the rotating shaft 20 and the gas mixing grid plate 11 are eccentrically arranged. The water flow in the mixing pipe 1 can drive the impeller 21 to rotate, so that the gas mixing grid plate 11 and the rotating shaft 20 rotate together. The rotation of the impeller 21 can break up the bubbles and make the bubbles and water mix evenly. The gas mixing grid plate 11 is inclined and eccentrically rotates, improving the effect of breaking up the bubbles and making the bubbles and water flow mix more evenly.

[0054] A throat section 12 is arranged below the air inlet section 7 in the mixing pipe 1. The inner diameter of the throat section 12 is smaller than that of the air inlet section 7. A contraction section 13 is between the air inlet section 7 and the throat section 12 in the mixing pipe 1, and a diffusion section 14 is between the throat section 12 and the water outlet pipe 3 in the mixing pipe 1. The throat section 12 is in the shape of a cylindrical hole. The inner diameter of the contraction section 13 gradually decreases from top to bottom, and the inner diameter of the diffusion section 14 gradually increases from top to bottom. The open end of the jet pipe 4 is placed in the contraction section 13, and the gas mixing grid plate 11 is arranged in the diffusion section 14. The lower end of the mixing pipe 1 is tightly connected to a water outlet joint 15. The water outlet joint 15 is threadedly and tightly connected to the mixing pipe 1. A plurality of water outlet nozzles 16 are arranged on the water outlet joint 15, and multiple water outlet pipes 3 are respectively connected to the corresponding water outlet nozzles 16. A pressure accumulation groove 17 is arranged on the water outlet joint 15. The pressure accumulation groove 17 is communicated with the mixing pipe 1, and the water outlet nozzles 16 are arranged at the bottom of the pressure accumulation groove 17.

[0055] During use, the mixing pipe 1 is installed and fixed on the biological treatment tank. The water inlet pipe 2 is connected to the high-level regulating tank. Multiple water outlet pipes 3 are inserted into different positions in the biological treatment tank to increase the aeration range. During operation, the water flow in the high-level regulating tank flows downward from the water inlet pipe 2 and is ejected into the mixing pipe 1 from the jet pipe 4. The ejected water flow flows out from the water outlet pipe 3 into the biological treatment tank. The flow of the water makes a negative pressure generated in the air inlet section 7 of the mixing pipe 1. Air flows into the mixing pipe 1 from the air inlet holes 8 and mixes with the water flow in the mixing pipe 1 to form a water-gas mixture. The water-gas mixture flows out from the water outlet pipe 3 into the biological treatment tank, increasing the oxygen content and achieving the effect of aeration.

[0056] There is a height difference between the high-level regulating tank and the biological treatment tank, providing water pressure for the water flow in the water inlet pipe 2 without the need for additional power equipment to provide power. The adjusting sleeve 9 moves up and down to adjust the number of exposed water inlet holes and the number of covered water inlet holes, thereby adjusting the air intake volume and realizing the adjustment of the aeration oxygen content. This non-powered oxygenation aeration structure for rural domestic sewage treatment has no need for power equipment to drive, has a simple structure, low cost, and is convenient for maintenance.

[0057] The above-described embodiments are only preferred solutions of the present utility model and do not impose any formal restrictions on the present utility model. There are other variations and modifications without exceeding the technical solutions described in the claims.

Claims

1. An oxygenation and aeration structure for treating rural domestic sewage without power, comprising a mixing pipe, wherein two ends of the mixing pipe are respectively connected to a water inlet pipe and a water outlet pipe, and the water outlet pipe is inserted into a biological treatment tank, characterized in that The water inlet pipe is connected to the high-level regulating tank. There is a height difference between the high-level regulating tank and the biological treatment tank. A jet pipe is installed in the mixing pipe, and the jet pipe is communicated with the water inlet pipe. An air intake section is arranged on the mixing pipe. A number of air intake holes are axially spaced on the air intake section. The air intake section is sleeved with a movable adjusting sleeve, and the adjusting sleeve can cover the air intake holes.

2. The oxygenation and aeration structure for treating rural domestic sewage without power according to claim 1, characterized in that, The air intake holes are inclined downward from top to bottom in the direction close to the axial direction of the mixing pipe.

3. The oxygenation aeration structure for treating rural domestic sewage without power according to claim 1 is characterized in that, A gas mixing mesh plate is arranged below the jet pipe in the mixing pipe, and fine mesh holes are densely distributed on the gas mixing mesh plate.

4. The oxygenation aeration structure for treating rural domestic sewage without power according to claim 3, characterized in that, A bracket is installed in the mixing pipe, a rotating shaft is installed on the bracket, an impeller is installed on the upper part of the rotating shaft, and the gas mixing mesh plate is connected to the lower part of the rotating shaft.

5. The oxygenation and aeration structure for treating rural domestic sewage without power according to claim 4, characterized in that, The gas mixing mesh plate is inclined, and the rotating shaft and the gas mixing mesh plate are eccentrically arranged.

6. The oxygenation and aeration structure for treating rural domestic sewage without power according to claim 1 is characterized in that the mixture A throat section is arranged below the air intake section in the pipe. The inner diameter of the throat section is smaller than that of the air intake section. The section between the air intake section and the throat section in the mixing pipe is a contraction section, and the section between the throat section and the water outlet pipe in the mixing pipe is a diffusion section.

7. The oxygenation and aeration structure for treating rural domestic sewage without power according to claim 1, characterized in that, The upper end of the mixing pipe is fixedly connected with a water inlet joint. The water inlet pipe is connected to the water inlet joint, and the jet pipe is arranged on the water inlet joint.

8. The oxygenation and aeration structure for treating rural domestic sewage without power according to claim 1, characterized in that, A conical mesh plate with a smaller upper part and a larger lower part is arranged in the mixing pipe, and fine mesh holes are densely distributed on the conical mesh plate.

9. A power-free oxygenation and aeration structure for rural domestic sewage treatment according to any one of claims 1 to 8, characterized in that, The water outlet pipe is a single pipe and is directly connected to the lower end of the mixing pipe.

10. A non-powered oxygenation and aeration structure for rural domestic sewage treatment according to any one of claims 1 to 8, characterized in that, The lower end of the mixing pipe is fixedly connected with a water outlet joint. A plurality of water outlet nozzles are arranged on the water outlet joint, and a plurality of water outlet pipes are respectively connected to the corresponding water outlet nozzles.

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