A device for dredging sewage pipes using pulsed air flow

Abstract

This utility model relates to the field of sludge removal devices, specifically a sludge removal device utilizing pulsed airflow in sewage pipelines. It includes a manhole in a gentle slope section, a manhole upstream of a steep slope, a manhole downstream of a steep slope, an airflow collection device, an air collection pipe, and an aeration ring. The manholes in the gentle slope section, upstream of the steep slope, and downstream of the steep slope are connected sequentially via sewage pipelines. The downstream manhole includes a chamber and a shaft. A sludge hopper is installed inside the chamber, and the airflow collection device is installed in the shaft. The airflow collection device is connected to one end of the air collection pipe, which has multiple branch air collection pipes. The ends of the branch air collection pipes are connected to the aeration ring fixed inside the sewage pipeline. This utility model collects pulsed airflow generated at points of significant slope change in the pipeline and transports it to the upstream sewage pipeline. This generates a large number of fine air bubbles evenly within the pipeline, which adhere to the sludge surface, forming bubble clusters. Under buoyancy, these bubble clusters rise and flow with the water into the sludge hopper, preventing sludge accumulation and pipe blockage.

Description

Technical Field

[0001] This utility model relates to the field of dredging devices, specifically a dredging device that utilizes pulsed airflow in sewage pipes. Background Technology

[0002] The smooth flow of sewage pipes directly affects public sanitation, flood control safety, and residents' daily lives. Over time, the inner walls of sewage pipes become clogged due to the continuous accumulation of grease, suspended solids, silt, and household waste, leading to reduced flow capacity and even serious consequences such as sewage overflows and road collapses. Therefore, regular dredging and maintenance of sewage pipes is a crucial and demanding task in municipal infrastructure management.

[0003] The most common method for dredging is to use high-pressure water to flush the sewage pipes regularly. This method is time-consuming and labor-intensive, especially in remote areas where pipe management and maintenance are not timely, resulting in poor dredging effectiveness.

[0004] Therefore, there is an urgent need for a sludge removal device that utilizes pulsed airflow in sewage pipes to solve the above problems. Utility Model Content

[0005] To overcome the problems existing in the prior art, the purpose of this utility model is to provide a sludge removal device that utilizes pulsed airflow in sewage pipelines. This device can collect pulsed airflow generated at locations with significant changes in pipeline slope and transport it to the upstream sewage pipeline to clean the sludge deposited at the bottom of the pipeline, preventing pipeline blockage and siltation. It also protects manhole covers and facilitates the daily management and maintenance of sewage pipelines.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a sludge removal device utilizing pulsed airflow in a sewage pipeline, comprising a gentle slope inspection well, an upstream steep slope inspection well, a downstream steep slope inspection well, an airflow collection device, an air collection pipe, and an aeration ring; the gentle slope inspection well, the upstream steep slope inspection well, and the downstream steep slope inspection well are sequentially connected via a sewage pipeline; The downstream inspection well of the steep slope includes a well chamber and a well shaft. A sludge hopper is installed in the well chamber, and an airflow collection device is installed in the well shaft. The airflow collection device is connected to one end of an air collection pipe, which is laid along the sewage pipeline. Multiple air collection branch pipes are installed on the air collection pipe, and an aeration ring is installed at the end of each air collection branch pipe. The aeration ring is fixed inside the sewage pipeline. The pulse airflow is transported back to the upstream sewage pipeline for sludge removal through the airflow collection device via the air collection pipe.

[0007] This invention collects pulsed airflow generated at locations with significant changes in pipe slope and transports it to the upstream sewage pipe through an air collection pipe. Aeration rings uniformly generate a large number of tiny bubbles in the pipe, which adhere to the sludge surface, forming bubble clusters. Under the action of buoyancy, the bubble clusters rise and enter the sludge hopper of the inspection well with the water flow, preventing sludge accumulation and blockage of the pipe.

[0008] The present invention is further configured such that: the airflow collection device includes an air collection hood, a bracket, and a sealing plate; the bracket is provided at the bottom of the air collection hood, the air collection hood is fixed inside the well shaft by the bracket, the sealing plate is provided at the top of the air collection hood, and a well cover is also provided at the top of the well shaft.

[0009] By setting up a gas collection hood to collect the pulsating airflow generated at locations with significant changes in pipeline slope, and by installing a sealing plate on the gas collection hood to prevent the airflow from rising and impacting the manhole cover, the manhole cover is protected.

[0010] The present invention is further configured such that: the gas collecting hood is a cylindrical structure, the outer diameter of the gas collecting hood is 50mm-100mm smaller than the inner diameter of the well shaft, and the gas collecting hood is made of carbon steel or stainless steel.

[0011] The present invention is further configured such that: the support is a ring structure, the inner ring diameter of the support is the same as the outer ring diameter of the gas collecting hood, and the outer ring diameter of the support is the same as the inner diameter of the well shaft; the top of the gas collecting hood is provided with a ring-shaped support platform, and the gas collecting hood is mounted on the support through the support platform.

[0012] The present invention is further configured such that: the sealing plate is a solid plate, and the sealing plate is detachably connected to the gas collection hood.

[0013] The present invention is further configured such that the elevation at the connection between the gas collecting pipe and the gas collecting hood is 100mm-200mm lower than the bottom of the sealing plate.

[0014] The present invention is further configured such that: the aeration ring is provided with aeration holes, which are symmetrically arranged along the center line of the aeration ring.

[0015] Specifically, it is preferable to open three aeration holes, with the middle hole located at the bottom of the aeration ring, and the two side holes at an angle of 45-60 degrees to the middle hole, symmetrically distributed on both sides of the middle hole.

[0016] The present invention is further configured such that the outer diameter of the aeration ring is 20mm-50mm smaller than the inner diameter of the sewage pipe.

[0017] The present invention is further configured such that the diameter of the aeration hole is 10mm-20mm.

[0018] The present invention is further configured such that: the slope between the manhole on the gentle slope and the manhole on the upstream side of the steep slope is no greater than 5‰, and the slope between the manhole on the upstream side of the steep slope and the manhole on the downstream side of the steep slope is greater than 5%.

[0019] In summary, the beneficial effects of the above-mentioned technical solution of this utility model are as follows: 1. This utility model collects the pulsed airflow generated at locations with significant changes in the slope of the pipeline and transports it to the upstream sewage pipeline. A large number of tiny air bubbles are generated evenly in the pipeline and adhere to the surface of the sludge to form bubble clusters. Under the action of buoyancy, the bubble clusters rise and enter the sludge hopper of the inspection well with the water flow, preventing sludge accumulation and blockage of the pipeline.

[0020] 2. By setting up a gas collection hood, the pulsed airflow generated at locations with significant changes in pipeline slope is collected, preventing the airflow from rising and impacting the manhole cover, thus protecting the manhole cover.

[0021] 3. The pulse airflow generated at points of significant change in pipeline slope is collected and utilized to dredge upstream sewage pipelines. No manual operation is required, saving time and effort and making management convenient.

[0022] 4. Utilizing the pulsed airflow generated at points of significant change in pipe slope, no other power source is required, resulting in energy-saving effects. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the sludge removal device that utilizes pulsed airflow in a sewage pipeline, as described in the embodiment.

[0025] Figure 2 This is a detailed diagram of the downstream inspection well of the sludge removal device utilizing pulsed airflow from a sewage pipeline, as described in the embodiment.

[0026] Figure 3 This is a cross-sectional view of the downstream inspection well of the sludge removal device utilizing pulsed airflow from a sewage pipeline as described in the embodiment.

[0027] Figure 4 This is a schematic diagram showing the connection between the air collection branch pipe and the aeration ring of the sludge removal device that utilizes pulsed airflow from sewage pipes, as described in the embodiment.

[0028] The attached diagram lists the components represented by each number as follows: 1. Manhole on gentle slope, 2. Manhole on upstream of steep slope, 3. Manhole on downstream of steep slope, 4. Sewage pipe on gentle slope, 5. Sewage pipe on steep slope, 6. Downstream sewage pipe, 7. Air collection pipe, 8. Aeration ring, 31. Manhole shaft, 32. Manhole chamber, 33. Manhole cover, 34. Air collection hood, 35. Support, 36. Sealing plate, 37. Maintenance steps, 38. Sludge hopper, 71. Air collection branch pipe, 81. Aeration hole. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solution of this utility model, the technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Based on the embodiments of this utility model, other similar embodiments obtained by those skilled in the art without creative effort should all fall within the protection scope of this utility model.

[0030] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0033] Example: like Figures 1-4 As shown, this is a preferred embodiment of the present invention, a sludge removal device utilizing pulsed airflow in a sewage pipeline, including a gentle slope inspection well 1, a steep slope upstream inspection well 2, a steep slope downstream inspection well 3, a gentle slope sewage pipeline 4, a steep slope sewage pipeline 5, a downstream sewage pipeline 6, an air collection pipe 7, and an aeration ring 8. The manhole 1 on the gentle slope and the manhole 2 on the upstream of the steep slope are connected by the sewage pipe 4 on the gentle slope. The manhole 2 on the upstream of the steep slope and the manhole 3 on the downstream of the steep slope are connected by the sewage pipe 5 on the steep slope. The outlet of the manhole 3 on the downstream of the steep slope is connected to the downstream sewage pipe 6.

[0034] The slope of the gentle section of the sewage pipe 4 and the downstream sewage pipe 6 is no greater than 5‰, while the slope of the steep section of the sewage pipe 5 is greater than 5%.

[0035] Combination Figures 2-3 As shown, the downstream inspection well 3 of the steep slope includes a top well casing 31 and a bottom well chamber 32. A well cover 33 is installed on the top of the well casing 31, and a sludge hopper 38 is installed at the bottom of the well chamber 32. The height of the sludge hopper 38 is 0.5m-0.7m.

[0036] An airflow collection device is installed inside the well shaft 31. The airflow collection device includes an air collection hood 34, a support 35, and a sealing plate 36. The support 35 is installed at the bottom of the air collection hood 34 and is fixed to the bottom of the well shaft 31. Its bottom is flush with the bottom of the well shaft 31. The sealing plate 36 is connected to the top of the air collection hood 34. The height of the sealing plate 36 is lower than that of the well cover 33. An opening is made on one side of the air collection hood 34 to connect the air collection pipe 7. After the air collection pipe 7 passes through the well shaft 31, it is laid upstream parallel to the sewage pipe 5 on the steep slope section and the sewage pipe 4 on the gentle slope section.

[0037] It should be noted that a maintenance step 37 can be installed at a certain distance from the bottom of the sealing plate 36 to the bottom of the well chamber 32. The maintenance step 37 between the bottom of the sealing plate 36 and the support 35 is located inside the gas collection hood 34, which facilitates the entry of maintenance personnel into the well chamber 32.

[0038] The gas collection hood 34 is a cylindrical structure with an outer diameter 50mm-100mm smaller than the inner diameter of the well shaft 31, and its material is carbon steel or stainless steel. The support 35 is a circular ring structure, with its inner ring diameter being the same as the outer ring diameter of the gas collection hood 34, and its outer ring diameter being the same as the inner diameter of the well barrel 31. The sealing plate 36 is a solid circular plate structure, and the sealing plate is detachably connected to the gas collecting hood. The elevation of the connection between the gas collecting pipe 7 and the gas collecting hood 34 is 100mm-200mm lower than the bottom of the sealing plate 36.

[0039] Combination Figure 4 As shown, the air collecting pipe 7 is vertically connected to the air collecting branch pipe 71 at certain intervals. The end of the air collecting branch pipe 71 is connected to the aeration ring 8. The aeration ring 8 is fixed inside the sewage pipe 5 in the steep slope section and the sewage pipe 4 in the gentle slope section. Three aeration holes 81 are opened on the aeration ring 8. The middle hole is located at the bottom of the aeration ring 8, and the two side holes are symmetrically distributed on both sides of the middle hole at an angle of 45 degrees to 60 degrees.

[0040] The outer diameter of the aeration ring 8 is 20mm-50mm smaller than the inner diameter of the sewage pipe 4 in the gentler section. The diameter of the aeration hole 81 is 10mm-20mm.

[0041] To facilitate understanding of the present invention, the implementation process of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0042] This utility model utilizes a sludge-clearing device that uses pulsed airflow in sewage pipes. When sewage flows in the gentle section of the sewage pipe 4, it carries gas along with it, forming a two-phase flow of gas and water. Because the slope of the gentle section of the sewage pipe 4 is small, the water flow velocity is low. When the water flows from the upstream inspection well 2 into the steep section of the sewage pipe 5, the slope of the pipe suddenly increases, and the water flow velocity also changes abruptly. The rapid gas and water phases collide with the well wall, and the gas and water quickly separate, forming a pulsed airflow. The pulsed airflow rises from the bottom of the well chamber 32 of the downstream inspection well 3. Due to the sealing effect of the support 35, the pulsed airflow enters the gas collection hood 34, preventing the airflow from rising and impacting the well cover 33, thus protecting the well cover 33. After the pulsed airflow enters the gas collection hood 34, it continues to flow upward. Due to the sealing effect of the sealing plate 36, the pulsed airflow turns into the gas collection pipe 7 and flows upstream along the gas collection pipe 7. Then it enters the aeration ring 8 through the gas collection branch pipe 71, and then enters the gentle section sewage pipe 4 and the steep slope section sewage pipe 5 evenly through the aeration holes 81 on the aeration ring 8.

[0043] The airflow through the aeration ring 8 will evenly generate a large number of tiny bubbles at the bottom of the gentle section of the sewage pipe 4 and the steep section of the sewage pipe 5. When these bubbles come into contact with the sludge, they will adhere to its surface and form bubble clusters. Under the action of buoyancy, the bubble clusters will rise and enter the sludge hopper of the downstream inspection well 3 of the steep slope with the water flow, preventing the sludge from continuing to settle at the bottom of the sewage pipe and causing pipe blockage.

[0044] When it is necessary to repair the downstream inspection well 5 of the steep slope or to go down into the well to pump out the sludge from the sludge bucket, the well cover 33 can be opened and the sealing plate 36 can be removed. The inside of the downstream inspection well 5 of the steep slope can be entered through the inside of the gas collection hood 34 and the maintenance steps 37 of the well chamber 32 for convenient maintenance and management.

[0045] Finally, it should be noted that the above content is only used to illustrate the technical solution of this utility model, and is not intended to limit the scope of protection of this utility model. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model do not depart from the essence and scope of the technical solution of this utility model.

Claims

1. A sludge removal device utilizing pulsed airflow in sewage pipes, characterized in that, It includes a manhole for a gentle slope section, a manhole for the upstream of a steep slope, a manhole for the downstream of a steep slope, an airflow collection device, an air collection pipe, and an aeration ring; the manholes for the gentle slope section, the upstream of the steep slope, and the downstream of the steep slope are connected in sequence via a sewage pipe. The downstream inspection well of the steep slope includes a well chamber and a well shaft. A sludge hopper is installed in the well chamber, and an airflow collection device is installed in the well shaft. The airflow collection device is connected to one end of an air collection pipe, which is laid along the sewage pipeline. Multiple air collection branch pipes are installed on the air collection pipe, and an aeration ring is installed at the end of each air collection branch pipe. The aeration ring is fixed inside the sewage pipeline. The pulse airflow is transported back to the upstream sewage pipeline for sludge removal through the airflow collection device via the air collection pipe.

2. The sludge removal device utilizing pulsed airflow in sewage pipes according to claim 1, characterized in that, The airflow collection device includes an air collection hood, a support, and a sealing plate; the support is installed at the bottom of the air collection hood, and the air collection hood is fixed inside the well shaft by the support; the sealing plate is installed at the top of the air collection hood, and a well cover is also installed at the top of the well shaft.

3. A sludge removal device utilizing pulsed airflow in sewage pipes according to claim 2, characterized in that, The gas collection hood has a cylindrical structure, with its outer diameter being 50mm-100mm smaller than the inner diameter of the well shaft. The gas collection hood is made of carbon steel or stainless steel.

4. A sludge removal device utilizing pulsed airflow in a sewage pipeline according to claim 2, characterized in that, The support is a circular ring structure. The inner ring diameter of the support is the same as the outer ring diameter of the gas collection hood, and the outer ring diameter of the support is the same as the inner diameter of the well shaft. A circular support platform is provided at the top of the gas collection hood, and the gas collection hood is mounted on the support through the support platform.

5. A sludge removal device utilizing pulsed airflow in a sewage pipeline according to claim 2, characterized in that, The sealing plate is a solid plate, and the sealing plate is detachably connected to the gas collection hood.

6. A sludge removal device utilizing pulsed airflow in sewage pipes according to claim 3, characterized in that, The elevation at the connection between the gas collecting pipe and the gas collecting hood is 100mm-200mm lower than the bottom of the sealing plate.

7. A sludge removal device utilizing pulsed airflow in sewage pipes according to claim 1, characterized in that, The aeration ring has aeration holes, which are symmetrically arranged along the center line of the aeration ring.

8. A sludge removal device utilizing pulsed airflow in a sewage pipeline according to claim 1, characterized in that, The outer diameter of the aeration ring is 20mm-50mm smaller than the inner diameter of the sewage pipe.

9. A sludge removal device utilizing pulsed airflow in a sewage pipeline according to claim 7, characterized in that, The diameter of the aeration holes is 10mm-20mm.

10. A sludge removal device utilizing pulsed airflow in a sewage pipeline according to any one of claims 1-9, characterized in that, The slope between the manhole on the gentle slope and the upstream manhole on the steep slope shall not exceed 5‰, and the slope between the upstream manhole on the steep slope and the downstream manhole on the steep slope shall exceed 5‰.

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