Automatic vent valve with defoaming function

Abstract

The utility model discloses an automatic exhaust valve with defoaming function, including valve body and install in the float ball of valve body, the float ball can reciprocate up and down in the valve body, the valve body includes upper valve body and with the lower valve body of upper valve body lower end sealed connection, is equipped with the exhaust port in the upper valve body upper end, is equipped with the defoaming chamber of with upper valve body valve cavity intercommunication in the lower valve body middle part, is equipped with the water outlet of with defoaming chamber intercommunication in defoaming chamber one side radiality, and the outer end is used for with water quality monitor inlet water line intercommunication, is equipped with a vertical setting inlet water pipe in the defoaming chamber middle part, inlet water pipe upper end is higher than the water outlet, and the lower end extends downward, forms the interface of with external sampling pipeline intercommunication. The inlet water pipe and defoaming chamber are equipped in the lower valve body, when water sample passes through inlet water pipe and enters the defoaming chamber of lower valve body, due to the difference between the water outlet and inlet water pipe upper end, thereby make the bubble of water sample in defoaming chamber float up, reach defoaming effect.

Description

Technical Field

[0001] This utility model relates to an exhaust valve, specifically an automatic exhaust valve with defoaming function. Background Technology

[0002] Automatic air vents are typically installed vertically at high points or local high points in system pipelines to expel accumulated air and ensure unobstructed flow. Existing automatic air vents mainly consist of a valve body and a float. The valve body has an air vent and an inlet channel at its upper and lower ends, respectively. The float, a hollow metal or plastic sphere, is installed within the valve body. When air is present in the pipeline, it enters the valve chamber and accumulates at the top. As the gas increases, the pressure rises. When the gas pressure exceeds the system pressure, the water level in the valve chamber drops, causing the float to descend and open the vent. After the gas is expelled, the water level rises, and the float rises as well, its upper end fitting into the air vent channel, closing the vent. When air accumulates again in the pipeline, it gathers at the top of the valve chamber, causing the liquid level to drop, the float to fall back, and the vent to reopen, continuing to release air.

[0003] A water quality monitor is an instrument used to monitor parameters such as turbidity, pH value, and conductivity of water. When monitoring the turbidity or dissolved oxygen (DO) parameters of a water sample, the presence of air bubbles in the sample will affect the accuracy of the test results. Therefore, a degassing tank or venting valve is usually installed on the sampling pipeline at the front end of the water quality monitor to remove air from the water sample. However, due to the higher cost of degassing tanks, venting valves are more widely used. But existing venting valves have a simple structure and are installed at a high point in the sampling pipeline. While they can effectively prevent large air masses from entering the analyzer, they are only a pre-treatment measure and cannot eliminate tiny air bubbles in the water sample. Summary of the Invention

[0004] In view of the above-mentioned shortcomings of the existing technology, the purpose of this utility model is to provide an automatic air vent valve with defoaming function, which solves the problem that the existing air vent valve has a simple structure and cannot eliminate tiny air bubbles in the water sample in the sampling pipeline.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] An automatic air vent valve with defoaming function includes a valve body and a float installed in the valve body, the float being able to move back and forth up and down in the valve body; the valve body includes an upper valve body and a lower valve body sealed to the lower end of the upper valve body, an air vent is provided at the upper end of the upper valve body; a defoaming chamber is provided in the middle of the lower valve body and communicates with the valve cavity of the upper valve body, an outlet is provided radially on one side of the defoaming chamber with its inner end communicating with the defoaming chamber and its outer end being used to communicate with the water inlet pipe of a water quality monitor, a vertically arranged water inlet pipe is provided in the middle of the defoaming chamber, the upper end of the water inlet pipe is higher than the water outlet, and the lower end extends downward to form an interface communicating with an external sampling pipe. In this configuration, a lower valve body is installed, with an inlet pipe and an outlet. External water samples flow through the pipe to the higher inlet pipe, then enter the lower and upper valve bodies. As the water sample enters, the height difference between the inlet and outlet causes the liquid to settle into the defoaming chamber, while air bubbles rise due to buoyancy, thus defoaming the water sample exiting the outlet. Simultaneously, as water enters the valve body and a large amount of gas accumulates at the top, the pressure inside the valve body increases. When the gas pressure exceeds the system pressure, the gas causes the water level in the valve chamber to drop, causing the float to descend with the water level and open the vent to release gas. Once the gas is exhausted, the water level rises, and the float rises accordingly, blocking the vent and closing the outlet.

[0007] Furthermore, the water inlet pipe is integrally formed with the lower valve body, and the interface at the lower end of the water inlet pipe is provided with external threads. In this way, there is no connection gap between the water inlet pipe and the lower valve body, the water sample is in a sealed space, and the external threads provided with the interface at the lower end of the water inlet pipe facilitate connection with the water sample pipeline.

[0008] Furthermore, the lower valve body and the upper valve body are connected by threads, and a sealing ring is embedded in the lower valve body, located at the end where the upper and lower valve bodies connect. In this way, the threaded connection between the lower and upper valve bodies provides a stable connection structure, facilitates easy assembly and disassembly, and the sealing ring at the connection point provides a sealing effect, preventing water sample leakage.

[0009] Furthermore, outwardly protruding guide blocks are provided on both sides of the float, and guide rails that cooperate with the guide blocks are provided on the inner wall of the upper valve body; a flexible sealing gasket is provided at the upper end of the float. Thus, with the guide rails installed in the upper valve body, the guide blocks are placed within the guide rails, and the guide rails guide the float as it moves up and down, ensuring stable floating. The flexible sealing gasket on the float ensures that when the upper end of the float blocks the vent, the flexible sealing gasket fits tightly against the lower end of the vent, achieving a sealing effect.

[0010] Furthermore, the distance between the upper end of the inlet pipe and the outlet is between 18-28mm. This arrangement effectively ensures an appropriate distance between the upper end of the inlet pipe and the outlet, allowing sufficient space and time for tiny air bubbles in the water sample to rise quickly, thus achieving a better defoaming effect. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural diagram of the automatic exhaust valve in the embodiment;

[0012] Figure 2 This is a top view of the automatic exhaust valve in the embodiment;

[0013] Figure 3 for Figure 2 Sectional view of AA;

[0014] Figure 4 This is a schematic diagram of the installation structure of the automatic exhaust valve in the embodiment. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0016] It should be noted that similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures, or the orientation or positional relationship commonly used when the product is in use. They 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. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In addition, the terms "horizontal," "vertical," etc., do not indicate that the component is required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted. In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of 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.

[0017] Existing air vents are typically installed high up in the pipeline, only opening to release gas when there is a large amount of gas in the pipeline, ensuring unobstructed water flow. Their function and structure are relatively simple. However, in water sample monitoring, in addition to air vents, defoaming of the water sample is necessary when monitoring parameters such as turbidity to avoid inaccurate monitoring results. Therefore, this embodiment adds a defoaming function to the existing air vent, and directly exports the defoamed water sample, connecting it to the inlet of the water quality monitor, thus meeting the defoaming requirements of water quality monitoring.

[0018] like Figures 1-3As shown, this embodiment provides an automatic air vent valve with defoaming function, including a valve body and a float 3 installed in the valve body. The float 3 can move back and forth up and down in the valve body. The valve body includes an upper valve body 1 and a lower valve body 2 sealed to the lower end of the upper valve body 1. An air vent 11 is provided at the upper end of the upper valve body 1. A defoaming chamber 21 communicating with the valve cavity of the upper valve body 1 is provided in the middle of the lower valve body 2. An outlet 23 is radially provided on one side of the defoaming chamber 21, with its inner end communicating with the defoaming chamber 21 and its outer end being used to communicate with the water inlet pipe 22 of the water quality monitor (a quick-connect connector is provided at the outlet 23 for connecting the pipe). A vertically arranged inlet pipe 22 is provided in the middle of the defoaming chamber 21. The upper end of the inlet pipe 22 is higher than the outlet 23, and the lower end extends downward to form an interface communicating with an external sampling pipe. Thus, a lower valve body 2 is configured, with an inlet pipe 22 and an outlet 23. External water samples flow through the pipe to the higher-level inlet pipe 22, entering the lower valve body 2 and the upper valve body 1. When the water sample enters, because the upper end of the inlet pipe 22 is higher than the outlet 23, a height difference exists between them. Therefore, when the water flows in, the liquid settles into the defoaming chamber 21, and the air bubbles rise under buoyancy, achieving a defoaming effect. This ensures that the water sample flowing out of the outlet 23 is defoamed. Simultaneously, as water flows into the valve body and a large amount of gas accumulates at the upper end, the pressure inside the valve body rises. When the gas pressure exceeds the system pressure, the gas causes the water level in the valve chamber to drop, and the float 3 descends with the water level, opening the vent 11 to release the gas. After the gas is completely released, the water level rises, and the float 3 rises accordingly, blocking the vent passage at the upper end of the float 3 and closing the vent 11.

[0019] In this embodiment, the inlet pipe 22 and the lower valve body 2 are integrally formed, and the interface at the lower end of the inlet pipe 22 is provided with external threads. In a specific implementation, the inlet pipe 22 and the lower valve body 2 can be formed separately and connected by a sealing connection. Also, in this embodiment, the diameters of the upper and lower protruding portions of the inlet pipe 22 are equal; in a specific implementation, the diameters may differ. After the inlet pipe 22 and the lower valve body 2 are integrally formed, there are no connecting gaps, resulting in good overall sealing performance. The external threads at the lower end interface of the inlet pipe 22 facilitate connection to a water sample pipeline.

[0020] like Figure 3 As shown, the lower end of the upper valve body 1 has an internal thread, and the upper end of the lower valve body 2 has an external thread that mates with the internal thread. The lower end of the upper valve body 1 is fitted onto the upper end of the lower valve body 2 via a threaded connection. A sealing ring 4 is embedded in the lower valve body 2, located at the connection point between the upper valve body 1 and the lower valve body 2. Thus, the lower valve body 2 and the upper valve body 1 are connected by a thread, resulting in a stable connection structure that is easy to assemble and disassemble. The sealing ring 4 at the connection point provides a seal, preventing water sample leakage.

[0021] In this embodiment, the float 3 has a plug at its upper end for sealing the lower end of the exhaust port 11. To ensure that the float 3, after rising, corresponds to the exhaust port 11 and blocks it, it is necessary to ensure that the plug always aligns with the exhaust port 11 after the float 3 moves up and down. Therefore, outwardly protruding guide blocks are provided on the left and right sides of the float 3, and a guide rail 12 that cooperates with the guide blocks is provided on the inner wall of the upper valve body 1. At the same time, to further ensure the sealing effect after sealing, a flexible sealing gasket is provided at the upper end of the float 3 (below the plug). In this way, after the guide rail 12 is set in the upper valve body 1, the guide block is placed in the guide rail 12. When the float 3 moves up and down, the guide rail 12 can guide it, making it float smoothly. The flexible sealing gasket provided on the float 3 can ensure that when the upper end of the float 3 blocks the exhaust port 11, the flexible sealing gasket is tightly attached to the lower end of the exhaust port 11, achieving a sealing effect.

[0022] In this embodiment, the distance between the upper end of the inlet pipe 22 and the outlet 23 is 23mm. This set distance can effectively ensure that there is an appropriate distance between the upper end of the inlet pipe 22 and the outlet 23. At this distance, the tiny bubbles in the water sample have enough space and time to float, so that the bubbles float quickly and achieve a better defoaming effect.

[0023] like Figure 4 As shown, the automatic air vent valve in this embodiment is vertically positioned, with its inlet pipe 22 connected at its lower end to a vertical branch pipe, which in turn is connected to a horizontal main pipe. The distance between the lower end of the automatic air vent valve and the horizontal main pipe is 0.5m. This installation height prevents unstable water pressure caused by insufficient installation height. In other words, this distance reduces the impact of fluctuations in water flow pressure on the air vent valve.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and not to limit the technical solutions. Those skilled in the art should understand that any modifications or equivalent substitutions to the technical solutions of this utility model that do not depart from the spirit and scope of this technical solution should be covered within the scope of the claims of this utility model.

Claims

1. An automatic air venting valve with defoaming function, comprising a valve body and a float installed within the valve body, the float being capable of reciprocating up and down within the valve body; characterized in that, The valve body includes an upper valve body and a lower valve body that is sealed to the lower end of the upper valve body. An exhaust port is provided at the upper end of the upper valve body. A defoaming chamber is provided in the middle of the lower valve body and is connected to the valve cavity of the upper valve body. An outlet is provided radially on one side of the defoaming chamber, with its inner end connected to the defoaming chamber and its outer end used to connect to the water inlet pipe of the water quality monitor. A vertically arranged water inlet pipe is provided in the middle of the defoaming chamber. The upper end of the water inlet pipe is higher than the water outlet, and the lower end extends downward to form an interface connected to an external sampling pipe.

2. The automatic exhaust valve with defoaming function according to claim 1, characterized in that, The water inlet pipe is integrally formed with the lower valve body, and the interface at the lower end of the water inlet pipe is provided with external threads.

3. The automatic exhaust valve with defoaming function according to claim 1 or 2, characterized in that, The lower valve body is connected to the upper valve body by a thread, and a sealing ring is embedded in the lower valve body. The sealing ring is located at the end of the connection between the upper valve body and the lower valve body.

4. The automatic exhaust valve with defoaming function according to claim 3, characterized in that, The float has outwardly protruding guide blocks on both sides, and a guide rail that mates with the guide blocks is provided on the inner wall of the upper valve body; a flexible sealing gasket is provided at the upper end of the float.

5. The automatic exhaust valve with defoaming function according to claim 1, 2, or 4, characterized in that, The distance between the upper end of the inlet pipe and the outlet is between 18-28mm.

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