Inspection hole structure for large-diameter water conveying pipeline

Abstract

The utility model belongs to the technical field of water delivery pipeline engineering, and discloses an inspection hole structure for a large-diameter water delivery pipeline, which comprises a valve well, a water delivery pipeline, a tee joint, a reducing pipe, an electric butterfly valve, a manual gate valve, an exhaust valve and a pressure sensor, the water inlet end of the electric butterfly valve is connected with the water conveying pipeline through the flange force transmission telescopic connector, the tee joint is connected with the water outlet end of the electric butterfly valve, the reducing pipe is connected with a top port of the tee joint, the manual gate valve is connected with the reducing pipe, the exhaust valve is connected with the manual gate valve, and the pressure sensor is installed on the water conveying pipeline. The utility model can improve the maintenance efficiency and reduce the maintenance cost.

Description

Technical Field

[0001] This utility model belongs to the technical field of water pipeline engineering, specifically relating to a structure for inspection holes in large-diameter water pipelines. Background Technology

[0002] Maintenance of long-distance water transmission pipelines is a crucial aspect of water conservancy project construction and operation. It frequently involves inspecting the pipeline's operational status, clearing silt and sediment, maintaining safety monitoring equipment, and repairing internal lining cracks, among other tasks. Management personnel primarily rely on regular pipeline patrols, supplemented by traditional methods of inspection such as listening, looking, touching, and smelling. When leaks are detected, and the internal condition of the pipeline needs to be examined, trenches are typically excavated to locate the damage, the pipeline is cut, workers repair or replace it, the pipeline is reconnected, and the trench is backfilled to restore the terrain. Most urban water transmission pipelines are buried under highways, and this road excavation often affects traffic safety. Furthermore, cutting and reconnecting the pipeline increases the number of connection points, creating potential hazards, and also increases maintenance time and operational costs. Utility Model Content

[0003] The purpose of this utility model is to provide a structure for inspection holes in large-diameter water transmission pipelines. A reducer is added at the branch connection of the water transmission pipeline. One end of the reducer is connected to the water transmission pipeline to form an inspection hole, and the other end is connected to a gate valve after diameter reduction to form an air release valve assembly. Both are flanged connections. It is used in conjunction with maintenance butterfly valves and pressure sensors, etc. This not only ensures the normal air intake and exhaust function of the air release valve in the water transmission pipeline, but also forms a working inspection hole, which facilitates workers to enter and exit the pipeline for inspection, positioning, and repair work. This can improve maintenance efficiency and reduce maintenance costs.

[0004] The technical solution adopted by this utility model is a structure for an inspection hole in a large-diameter water transmission pipeline, including a valve well, a water transmission pipeline, a tee, a reducer, an electric butterfly valve, a manual gate valve, an air release valve, and a pressure sensor. The water transmission pipeline is inserted into the valve well. The inlet end of the electric butterfly valve is connected to the water transmission pipeline through a flange force transmission expansion joint. The tee is connected to the outlet end of the electric butterfly valve. The reducer is connected to the top port of the tee. The manual gate valve is connected to the reducer. The air release valve is connected to the manual gate valve. The pressure sensor is installed on the water transmission pipeline.

[0005] Furthermore, the valve well includes a bottom plate, a well wall, and a cover plate. The bottom plate is fixedly connected to the bottom end of the well wall, and the cover plate is fixedly connected to the top end of the well wall. A concrete pad layer is provided around the bottom plate and the well wall.

[0006] Furthermore, the base plate is provided with supports for the electric butterfly valve and the tee.

[0007] Furthermore, the water supply pipe and the tee that penetrate the well wall are all fitted with waterproof sleeves.

[0008] Furthermore, a water collection pit is provided below the base plate.

[0009] Furthermore, a prefabricated well ring is provided on the cover plate, an inspection hole is opened at the top of the prefabricated well ring, and a step is installed on the well wall facing the inspection hole.

[0010] The beneficial effects of this utility model are as follows:

[0011] This utility model proposes a structure for inspection holes in large-diameter water pipelines. A reducer is added at the branch connection of the water pipeline. One end of the reducer connects to the water pipeline to form an inspection hole, while the other end, after diameter reduction, connects to a gate valve to form an air release valve assembly. Both ends are flanged and used in conjunction with a maintenance butterfly valve and pressure sensor. This design ensures the normal air intake and exhaust functions of the water pipeline's air release valves while also creating a working inspection hole. This facilitates workers' access to the pipeline for inspection, positioning, and repair work, improving maintenance efficiency and reducing maintenance costs. Attached Figure Description

[0012] Figure 1 This is a schematic plan view of the overall structure of this utility model;

[0013] Figure 2 This is a schematic cross-sectional view of the overall structure of this utility model;

[0014] Explanation of reference numerals in the attached drawings: 1. Water supply pipeline; 2. Waterproof sleeve; 3. Flange force transmission expansion joint; 4. Electric butterfly valve; 5. Tee; 6. Reducer; 7. Manual butterfly valve; 8. Air vent valve; 9. Pressure sensor; 10. Flange; 11. Support; 12. Base plate; 13. Step; 14. Well wall; 15. Sump; 16. Inspection hole; 17. Precast well ring; 18. Cover plate; 20. Concrete bedding layer. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer and more understandable, the technical solutions of this utility model will be further described in detail below with reference to the accompanying drawings.

[0016] like Figure 1 , Figure 2As shown, the inspection hole structure for a large-diameter water pipeline provided in this embodiment includes a valve well, a water pipeline 1, a tee 5, a reducer 6, an electric butterfly valve 4, a manual gate valve 7, an air vent valve 8, and a pressure sensor 9. The water pipeline 1 is inserted into the valve well. The inlet end of the electric butterfly valve 4 is connected to the water pipeline 1 through a flanged force-transmitting expansion joint 3. The tee 5 is connected to the outlet end of the electric butterfly valve 4. The reducer 6 is connected to the top port of the tee 5. The manual gate valve 7 is connected to the reducer 6. The air vent valve 8 is connected to the manual gate valve 7. The pressure sensor 9 is installed on the water pipeline 1.

[0017] The tee 5 is installed perpendicularly to the water supply pipeline 1, and its upper end is connected to the reducer 6 with a diameter of Ф800mm via flange 10. The diameter of the other end of the reducer 6 is determined based on the pipeline's inlet and outlet air volume. It is also installed in combination with the manual gate valve 7 and the air vent valve 8. When water begins to be injected into the water supply pipeline 1, the manual gate valve 7 opens normally, and the float in the air vent valve 8 remains in the open position to release a large amount of air. When the air is completely released, water accumulates in the valve, the float is lifted, and the float moves to the closed position, stopping the large-scale air release. When water is being transported normally in the water supply pipeline 1, if a small amount of air accumulates in the air vent valve 8 to a certain extent, the water level in the air vent valve 8 drops, and the float drops accordingly. At this time, a small amount of air is discharged through the micro-vent hole. When the water supply is interrupted and stops, when the water in the water supply pipeline 1 is empty, or when negative pressure is generated in the pipe, the piston quickly starts to draw in air, ensuring the smooth operation of the water supply pipeline 1.

[0018] The electric butterfly valve 4 serves to regulate and cut off water flow. When the water supply system is operating normally, the electric butterfly valve 4 is open, with the butterfly plate parallel to the pipe section, allowing water to flow through the butterfly plate channel. When water is cut off for maintenance, the electric butterfly valve 4 closes, with the butterfly plate perpendicular to the pipe section, cutting off the water flow. One end of the electric butterfly valve 4 is connected to the tee 5 via flange 10, and the other end is connected to the flange-driven expansion joint 3. The pipeline equipment and the joint are connected in series using fully threaded bolts and secured with nuts, forming a single unit.

[0019] Pressure sensor 9 is equipped with a remote control terminal, which is powered by 220V / 380V and communicates with the management platform via 4G IoT to monitor pipeline pressure in real time. It will immediately alarm if the pressure exceeds the limit. During installation, a suitable mounting hole can be machined on the water supply pipeline 1, and a good seal can be formed by rotating the thread.

[0020] The valve well includes a base plate 12, a well wall 14, and a cover plate 18. The base plate 12 is fixedly connected to the bottom end of the well wall 14, and the cover plate 18 is fixedly connected to the top end of the well wall 14. A concrete pad 20 is provided around the base plate 12 and the well wall 14. A support 11 is provided on the base plate 12 to support the electric butterfly valve 4 and the tee 5. Waterproof sleeves 2 are fitted on the pipes of the water supply pipe 1 and the tee 5 that pass through the well wall 14 to prevent damage or leakage of the pipes. A sump 15 is provided below the base plate 12. A prefabricated well ring 17 is provided on the cover plate 18. An inspection hole 16 is opened at the top of the prefabricated well ring 17. Steps 13 are installed on the well wall 14 facing the inspection hole 16, allowing maintenance personnel to enter the valve well through the inspection hole 16 and the steps 13 to perform maintenance and repair on the facilities inside the well.

[0021] Any content not described in detail in this specification is prior art known to those skilled in the art.

Claims

1. A structure for an inspection hole in a large-diameter water pipeline, characterized in that, The system includes a valve well, a water supply pipeline, a tee, a reducer, an electric butterfly valve, a manual gate valve, an air release valve, and a pressure sensor. The water supply pipeline is inserted into the valve well. The inlet end of the electric butterfly valve is connected to the water supply pipeline via a flanged expansion joint. The tee is connected to the outlet end of the electric butterfly valve. The reducer is connected to the top port of the tee. The manual gate valve is connected to the reducer. The air release valve is connected to the manual gate valve. The pressure sensor is installed on the water supply pipeline.

2. The inspection hole structure for large-diameter water pipelines according to claim 1, characterized in that, The valve well includes a bottom plate, a well wall, and a cover plate. The bottom plate is fixedly connected to the bottom end of the well wall, and the cover plate is fixedly connected to the top end of the well wall. A concrete pad layer is provided around the bottom plate and the well wall.

3. The inspection hole structure for large-diameter water pipelines according to claim 2, characterized in that, The base plate is equipped with supports for the electric butterfly valve and the tee.

4. The inspection hole structure for large-diameter water pipelines according to claim 2, characterized in that, The water supply pipes and tees that penetrate the well wall are all fitted with waterproof sleeves.

5. The inspection hole structure for large-diameter water pipelines according to claim 2, characterized in that, A water collection pit is provided below the base plate.

6. The inspection hole structure for large-diameter water pipelines according to claim 2, characterized in that, The cover plate is provided with a prefabricated well ring, the top of the prefabricated well ring is provided with an inspection hole, and the well wall is provided with a step facing the inspection hole.

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