Automatic air-venting device for water supply pipeline based on linkage of buoyancy

Abstract

This utility model relates to the field of municipal water supply and drainage technology, and discloses an automatic air venting device for water supply pipelines based on buoyancy linkage. It includes a valve body and a main float. The upper part of the valve body is provided with a valve cover filter assembly for filtering impurities in the water in the pipeline. The upper part of the valve cover filter assembly is provided with an air venting chamber for temporarily storing and draining gas accumulated in the pipeline. The upper part of the air venting chamber has three pilot air vents for discharging trace amounts of gas. The lower part of the air venting chamber is fixedly connected to a main air venting pipe for quickly discharging large amounts of accumulated gas. The inner end of the air venting chamber away from the valve body is provided with a main floating mechanism for sensing water level changes and driving the main air venting pipe to open and close. The inner end of the air venting chamber near the valve body is provided with a pilot floating assembly for sensing trace amounts of gas and driving the pilot air vents to open and close. The pilot floating assembly and the main floating mechanism are connected by a linkage mechanism.

Description

Technical Field

[0001] This utility model relates to the field of municipal water supply and drainage technology, specifically to an automatic air venting device for water supply pipelines based on buoyancy linkage. Background Technology

[0002] The buoyancy-based automatic air venting device for water supply pipelines is a key piece of equipment in municipal water supply systems for automatically removing accumulated air from pipes. In municipal water supply pipelines, air may accumulate due to factors such as dissolved gas release, air intake after pipeline maintenance, and water temperature changes. If not removed promptly, this can lead to increased flow resistance, decreased water delivery efficiency, and even water hammer, damaging the pipeline. This device utilizes the linkage between buoyancy and a mechanical structure to automatically remove air from the pipeline without manual operation, ensuring stable operation of the water supply system. Due to its simple structure, high reliability, and lack of external power requirements, this device is widely used in municipal water supply pipelines and secondary water supply systems in residential communities, serving as an important piece of equipment for ensuring water delivery efficiency and pipeline safety.

[0003] Common buoyancy-based automatic air venting devices for water supply pipelines mostly use a single float, and the opening and closing process is mostly a binary mode of either opening or closing. This makes it impossible to accurately adjust the air venting flow based on the amount of gas accumulated. When a small amount of gas accumulates, the response is slow and the air venting is not timely. When a large amount of gas is released instantaneously, it is easy to generate a strong air hammer phenomenon due to the sudden change in airflow, which impacts the pipeline system and generates noise. Secondly, traditional float mechanisms are easily entangled or blocked by impurities (such as rust and silt) in the pipeline water, which leads to obstructed float movement, poor sealing, or even functional failure. The maintenance frequency is high and the reliability is insufficient. Moreover, most products do not integrate filtration functions, and impurities directly enter the valve cavity, accelerating the wear of seals and corrosion of valve ports, shortening the service life of the device. Therefore, those skilled in the art provide an automatic air venting device for water supply pipelines based on buoyancy linkage to solve the problems mentioned in the background art. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic air venting device for water supply pipelines based on buoyancy linkage, thereby solving the problems mentioned in the background section of the prior art.

[0005] This utility model provides the following technical solution: an automatic air venting device for water supply pipelines based on buoyancy linkage, comprising a valve body and a main float. The upper part of the valve body is provided with a valve cover filter assembly for filtering impurities in the water in the pipeline. The upper part of the valve cover filter assembly is provided with an air venting chamber for temporarily storing and draining gas accumulated in the pipeline. The upper part of the air venting chamber is provided with three pilot air vents for discharging trace amounts of gas. The lower part of the air venting chamber is fixedly connected to a main air venting pipe for quickly discharging large amounts of accumulated gas. The inner end of the air venting chamber away from the valve body is provided with a main floatation mechanism for sensing water level changes and driving the main air venting pipe to open and close. The inner end of the air venting chamber near the valve body is provided with a pilot floatation assembly for sensing trace amounts of gas and driving the pilot air vents to open and close. The pilot floatation assembly and the main floatation mechanism are connected by a linkage mechanism.

[0006] As a preferred embodiment of the above technical solution, the valve cover filter assembly includes a filter screen frame, which is threadedly connected to the upper part of the valve body. A filter screen is fixedly sleeved on the inner side of the filter screen frame, and an operating handle is fixedly connected to the lower edge of the filter screen frame. A sealing ring is tightly connected between the upper end of the filter screen frame and the inner wall of the valve body.

[0007] As a preferred embodiment of the above technical solution, the pilot floating assembly includes a sliding plug, which is slidably fitted inside the exhaust chamber. A rotating rod is rotatably hinged to the lower end of the sliding plug. A connecting column is fixedly connected to the lower end of the rotating rod. Fixed protrusions are hinged to both sides of the connecting column, and the two fixed protrusions are symmetrically arranged at the lower end of the outer wall of the exhaust chamber.

[0008] As a preferred embodiment of the above technical solution, a pilot float is fixedly connected to the lower end of the connecting column, and a lightweight float is fixedly connected to the end of the pilot float away from the connecting column.

[0009] As a preferred embodiment of the above technical solution, the linkage mechanism includes a fixed clamping column, which is fixedly connected to the upper end of the pilot float near the lightweight float. A connecting rod is hinged to the inner side of the fixed clamping column. A fixed shaft is rotatably sleeved at the end of the connecting rod away from the fixed clamping column. Fixed protrusions are rotatably sleeved at both ends of the fixed shaft. Sliding sleeves are fixedly connected to the upper ends of the two fixed protrusions.

[0010] As a preferred embodiment of the above technical solution, both of the sliding sleeves are fitted with fixed posts inside, and both fixed posts are fixedly connected to the two side walls of the main float rod near the valve body.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: When the device is operating normally, the valve body and the lower part of the exhaust chamber are filled with water from the municipal water supply pipeline. Under the buoyancy of the main float and the lightweight float, the main floating mechanism pushes the main exhaust pipe to the closed state. At the same time, the pilot floating assembly drives the sliding plug to close the pilot exhaust hole. When the gas in the municipal water supply pipeline gradually accumulates at the top of the exhaust chamber, the water level in the chamber drops accordingly. The lightweight float, due to its small size and light weight, is extremely sensitive to changes in water level and takes the lead in driving the pilot floating rod to sink. Through the transmission of the connecting column and the rotating rod, the sliding plug is driven to move horizontally away from the valve body in the exhaust chamber, thereby opening the pilot exhaust hole and allowing the trace amount of gas generated in the municipal water supply system to be discharged smoothly.

[0012] Based on the aforementioned beneficial effects, if a large amount of gas continues to accumulate in a municipal water supply pipeline, causing a significant drop in water level, the lightweight float drives the linkage mechanism. Once the sliding sleeve completes its independent sliding stroke on the fixed column, it is forcibly pulled downwards by the linkage mechanism, thereby opening the main exhaust pipe for rapid, high-flow-rate exhaust, effectively addressing the large amounts of gas that may be generated in the municipal water supply system. After the gas is exhausted and the water level rises, the main float and the lightweight float rise synchronously under buoyancy, the pilot exhaust port closes first, and then the main exhaust pipe closes under the action of the mechanism, restoring the device to its initial sealed state, completing one automatic exhaust cycle. The entire process achieves early monitoring and slow release of trace amounts of gas in the municipal water supply pipeline and rapid response and discharge of large amounts of gas, effectively avoiding air hammer and water hammer phenomena and ensuring the stable operation of the municipal water supply pipeline system. Attached Figure Description

[0013] Figure 1 A three-dimensional structural diagram of an automatic air venting device for water supply pipelines based on buoyancy linkage;

[0014] Figure 2 This is a cross-sectional schematic diagram of an automatic air venting device for water supply pipelines based on buoyancy linkage.

[0015] Figure 3 A three-dimensional anatomical diagram of the valve cover filter assembly of an automatic air venting device for water supply pipelines based on buoyancy linkage;

[0016] Figure 4 This is a schematic diagram of the linkage mechanism of an automatic air venting device for water supply pipelines based on buoyancy linkage.

[0017] Figure 5 This is a partial three-dimensional disassembled schematic diagram of an automatic air venting device for water supply pipelines based on buoyancy linkage.

[0018] In the diagram: 1. Valve body; 2. Valve cover filter assembly; 21. Filter screen frame; 22. Filter screen mesh; 23. Operating handle; 24. Sealing ring; 3. Exhaust chamber; 4. Pilot exhaust port; 5. Main exhaust pipe; 6. Main floating mechanism; 61. Main floating rod; 7. Pilot floating assembly; 71. Sliding plug; 72. Rotating rod; 73. Connecting column; 74. Fixed protrusion one; 75. Pilot floating rod; 76. Lightweight float; 8. Linkage mechanism; 81. Fixed clamping column; 82. Connecting rod; 83. Fixed shaft; 84. Fixed protrusion two; 85. Sliding sleeve; 86. Fixed column. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0020] Please see Figures 1-2 As shown, this utility model provides a technical solution: an automatic air venting device for water supply pipelines based on buoyancy linkage, including a valve body 1 and a main float 61. The upper part of the valve body 1 is provided with a valve cover filter assembly 2 for filtering impurities in the water in the pipeline. The upper part of the valve cover filter assembly 2 is provided with an exhaust chamber 3 for temporarily storing and clearing the gas accumulated in the pipeline. The upper part of the exhaust chamber 3 is provided with three pilot exhaust holes 4 for discharging trace amounts of gas. The lower part of the exhaust chamber 3 is fixedly connected to a main exhaust pipe 5 for quickly discharging a large amount of accumulated gas. The end of the exhaust chamber 3 away from the valve body 1 is provided with a main float mechanism 6 for sensing water level changes and driving the main exhaust pipe 5 to open and close. The end of the exhaust chamber 3 near the valve body 1 is provided with a pilot float assembly 7 for sensing trace amounts of gas and driving the pilot exhaust holes 4 to open and close. The pilot float assembly 7 and the main float mechanism 6 are connected by a linkage mechanism 8.

[0021] When a small amount of gas accumulates, the lightweight float 76 can independently trigger the pilot vent 4 to release gas, while the main floating mechanism 6 remains stationary during this stage. When a large amount of gas accumulates, after the lightweight float 76 completes its independent stroke, the force is rigidly transmitted to the main floating rod 61 through the linkage mechanism 8, forcing the main floating mechanism 6 to open, thereby realizing a gradual venting process from a small flow rate to a large flow rate.

[0022] As one implementation method in this embodiment, please refer to Figures 2-3 As shown, the valve cover filter assembly 2 includes a filter screen frame 21, which is threadedly connected to the upper part of the valve body 1. A filter screen 22 is fixedly sleeved on the inner side of the filter screen frame 21. An operating handle 23 is fixedly connected to the lower edge of the filter screen frame 21. A sealing ring 24 is tightly connected to the upper end of the filter screen frame 21 and the inner wall of the valve body 1.

[0023] The filter frame 21 is connected by threads for easy disassembly, cleaning, or replacement of the filter screen 22. The operating handle 23 provides a screwing point. The sealing ring 24 ensures the sealing of the connection between the filter frame 21 and the valve body 1, preventing unfiltered water from entering the exhaust chamber 3. The filter screen 22 effectively intercepts impurities such as rust and silt in the water in the pipeline, preventing impurities from clogging or wearing the valve port, and ensuring the long-term reliable operation of the exhaust device.

[0024] As one implementation method in this embodiment, please refer to Figure 5 As shown, the pilot floating assembly 7 includes a sliding plug 71, which is slidably fitted inside the exhaust chamber 3. A rotating rod 72 is rotatably hinged to the lower end of the sliding plug 71. A connecting post 73 is fixedly connected to the lower end of the rotating rod 72. Fixed protrusions 74 are hinged to both sides of the connecting post 73. The two fixed protrusions 74 are symmetrically arranged at the lower end of the outer wall of the exhaust chamber 3.

[0025] The sliding plug 71 slides left and right on the inner wall of the venting chamber 3. The rotating rod 72 at its lower end is hinged to the connecting column 73 to form a floating connection. The fixed protrusion 74 provides the swing fulcrum for the connecting column 73. When the lightweight float 76 rises and falls with the water level, the rotating rod 72 is driven by the pilot float rod 75 and the connecting column 73, which in turn drives the sliding plug 71 to move left and right, thereby realizing the opening and closing control of the pilot venting hole 4.

[0026] As one implementation method in this embodiment, please refer to Figure 5 As shown, a pilot float rod 75 is fixedly connected to the lower end of the connecting column 73, and a lightweight float 76 is fixedly connected to the end of the pilot float rod 75 away from the connecting column 73.

[0027] The lightweight float 76 has a density much less than water and a weight much less than the overall weight of the main floating mechanism 6. It is extremely sensitive to changes in water level. When a small amount of gas accumulates and causes a slight drop in water level, the lightweight float 76 can drive the pilot float rod 75 to sink. The sliding plug 71 is triggered by the connecting column 73 and the rotating rod 72 mechanism to open the pilot vent 4, thereby achieving early and stable discharge of the small amount of gas.

[0028] As one implementation method in this embodiment, please refer to Figures 4-5 As shown, the linkage mechanism 8 includes a fixed clamping column 81, which is fixedly connected to the upper end of the pilot float 75 near the lightweight float 76. A connecting rod 82 is hinged to the inner side of the fixed clamping column 81. A fixed shaft 83 is rotatably sleeved at the end of the connecting rod 82 away from the fixed clamping column 81. Fixed protrusions 84 are rotatably sleeved at both ends of the fixed shaft 83. Sliding sleeves 85 are fixedly connected to the upper ends of the two fixed protrusions 84.

[0029] The fixed clamping column 81 is rigidly connected to the pilot float 75 and moves with it. When the pilot float 75 moves downward, due to the distance between the groove openings, the pilot float 75 and the lightweight float 76 can move independently. When the water level changes significantly, when the main floating mechanism 6 moves downward, the pilot float assembly 7 can simultaneously pull the main floating mechanism 6 to move downward, thus realizing the decoupling of motion and force transmission between the pilot float assembly 7 and the main floating mechanism 6.

[0030] As one implementation method in this embodiment, please refer to Figures 4-5 As shown, both sliding sleeves 85 are fitted with fixed posts 86 inside, and both fixed posts 86 are fixedly connected to the two side walls of the main float rod 61 near the valve body 1.

[0031] The fixed column 86 is fixedly connected to the main float rod 61. The sliding sleeve 85 can slide up and down along the fixed column 86. When the pilot float assembly 7 moves, the sliding sleeve 85 is pushed by the connecting rod 82. The sliding sleeve 85 slides on the fixed column 86. In the initial stage, it provides an independent stroke for the main float rod 61. When the sliding sleeve 85 moves to the limit position, it starts to pull the fixed column 86 and the main float rod 61 to move together, thereby opening the main exhaust port. This mechanical structure ensures the timing and linkage reliability of the pilot action and the main valve action.

[0032] Working principle: When the device is operating normally, the valve body 1 and the lower part of the exhaust chamber 3 are filled with water from the municipal water supply pipeline. Under the buoyancy of the main float and the lightweight float 76, the main floating mechanism 6 pushes the main exhaust pipe 5 to the closed state. At the same time, the pilot floating assembly 7 drives the sliding plug 71 to close the pilot exhaust port 4. When the gas in the municipal water supply pipeline gradually accumulates at the top of the exhaust chamber 3, the water level in the chamber drops accordingly. The lightweight float 76, due to its small size and light weight, is extremely sensitive to changes in water level and takes the lead in driving the pilot floating rod 75 to sink. Through the transmission of the connecting column 73 and the rotating rod 72, it drives the sliding plug 71 to move horizontally away from the valve body 1 in the exhaust chamber 3, thereby opening the pilot exhaust port 4 and allowing the trace amount of gas generated in the municipal water supply system to be discharged smoothly.

[0033] If a large amount of gas continues to accumulate in the municipal water supply pipeline, causing a significant drop in water level, the lightweight float 76 drives the linkage mechanism 8. After the sliding sleeve 85 completes its independent sliding stroke on the fixed column 86, it is forced to move the main float rod 61 downward through the connecting rod 82 mechanism. This opens the main exhaust pipe 5 for rapid, high-flow-rate exhaust, effectively addressing the large amount of gas that may be generated in the municipal water supply system. Once the gas is exhausted and the water level rises, the main float and lightweight float 76 rise synchronously under buoyancy. The pilot exhaust port 4 closes first, followed by the main exhaust pipe 5 closing under the action of the mechanism. The device returns to its initial sealed state, completing one automatic exhaust cycle. The entire process achieves early monitoring and slow release of trace amounts of gas in the municipal water supply pipeline and rapid response and discharge of large amounts of gas, effectively avoiding air hammer and water hammer phenomena and ensuring the stable operation of the municipal water supply pipeline system.

[0034] Of course, the above description is not intended to limit the present utility model, nor is the present utility model limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should be protected by the present utility model.

Claims

1. A water supply pipe automatic air venting device based on linkage of buoyancy, characterized in that: The device includes a valve body (1) and a main float (61). The upper part of the valve body (1) is provided with a valve cover filter assembly (2) for filtering impurities in the water in the pipeline. The upper part of the valve cover filter assembly (2) is provided with an exhaust chamber (3) for temporarily storing and draining the gas accumulated in the pipeline. The upper part of the exhaust chamber (3) is provided with three pilot exhaust holes (4) for discharging trace amounts of gas. The lower part of the exhaust chamber (3) is fixedly connected to a main exhaust pipe (5) for quickly discharging a large amount of accumulated gas. The end of the exhaust chamber (3) away from the valve body (1) is provided with a main float mechanism (6) for sensing water level changes and driving the main exhaust pipe (5) to open and close. The end of the exhaust chamber (3) near the valve body (1) is provided with a pilot float assembly (7) for sensing trace amounts of gas and driving the pilot exhaust holes (4) to open and close. The pilot float assembly (7) and the main float mechanism (6) are connected by a linkage mechanism (8).

2. The automatic air venting device for water supply pipelines based on buoyancy linkage according to claim 1, characterized in that: The valve cover filter assembly (2) includes a filter screen frame (21), which is threaded to the upper part of the valve body (1). A filter screen (22) is fixedly sleeved on the inner side of the filter screen frame (21). An operating handle (23) is fixedly connected to the lower edge of the filter screen frame (21). A sealing ring (24) is tightly connected to the upper end of the filter screen frame (21) and the inner wall of the valve body (1).

3. The automatic air venting device for water supply pipelines based on buoyancy linkage according to claim 1, characterized in that: The pilot floating assembly (7) includes a sliding plug (71), which is slidably fitted inside the exhaust chamber (3). A rotating rod (72) is rotatably hinged to the lower end of the sliding plug (71). A connecting column (73) is fixedly connected to the lower end of the rotating rod (72). Fixed protrusions (74) are hinged to both sides of the connecting column (73). The two fixed protrusions (74) are symmetrically arranged at the lower end of the outer wall of the exhaust chamber (3).

4. The float linkage based automatic air venting device for water supply line according to claim 3, wherein: The lower end of the connecting column (73) is fixedly connected to a pilot float rod (75), and a lightweight float (76) is fixedly connected to the end of the pilot float rod (75) away from the connecting column (73).

5. The float linkage based automatic air venting device for water supply line according to claim 4, wherein: The linkage mechanism (8) includes a fixed clamping column (81), which is fixedly connected to the upper end of the pilot float (75) near the lightweight float (76). A connecting rod (82) is hinged to the inner side of the fixed clamping column (81). A fixed shaft (83) is rotatably sleeved at one end of the connecting rod (82) away from the fixed clamping column (81). Fixed protrusions (84) are rotatably sleeved at both ends of the fixed shaft (83). Sliding sleeves (85) are fixedly connected to the upper ends of the two fixed protrusions (84).

6. The float linkage based automatic air venting device for water supply line according to claim 5, wherein: Both of the sliding sleeves (85) are fitted with fixed posts (86) inside, and both fixed posts (86) are fixedly connected to the two side walls of the main float rod (61) near the valve body (1).

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