Automatic exhaust valve

Abstract

The utility model relates to an exhaust valve, in particular to an automatic exhaust valve. An automatic exhaust valve comprises a shell, an inner cavity is formed in the shell, and a buoy capable of floating up and down is arranged in the cavity. And the buoy is formed by connecting two parts with different densities. The buoys comprise the first buoy and the second buoy which is arranged on the lower side of the first buoy and is smaller than the first buoy in density. According to the utility model, the floating cylinder floats up and down to drive the exhaust valve to be automatically opened and closed so as to realize gas exhaust, meanwhile, the adopted floating cylinder material has good high temperature resistance and density advantages, and the sealing structure adopts the combination of the sealing gasket and the O-shaped ring, so that the exhaust valve is ensured to be effective in exhaust when being automatically opened and reliable in sealing when being closed. Compared with the prior art, the exhaust valve is simple in structure, convenient to use, high in reliability and suitable for large-scale popularization and application.

Description

Technical Field

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

[0002] In various industrial equipment, liquid systems often require insulating or cooling media to ensure stable operation. During prolonged operation, these liquid systems may experience gas accumulation due to temperature changes, chemical reactions, or external environmental factors, affecting normal system function. This gas accumulation problem is particularly prominent in low-density media. Gas accumulation can cause the liquid level to drop, potentially triggering false alarms or system shutdowns, leading to equipment malfunctions or production interruptions.

[0003] Existing venting devices mostly rely on manual operation or periodic maintenance to remove accumulated gas. However, this method is not only inefficient but also prone to failure to vent in a timely manner due to human negligence. Traditional venting valves often lack automated venting and have poor sealing performance in high-temperature environments, making them prone to leakage or ineffective venting. Therefore, there is a lack of venting valve devices in the current technology that can automatically vent and have high reliability. To ensure the efficient and stable operation of liquid systems, there is an urgent need for a device that can automatically vent gas when it accumulates to a certain level. This device should have the following characteristics: Automation: It can automatically vent gas when it accumulates without manual intervention. High reliability: It can ensure stable operation in different working environments, especially in high-temperature and low-density media. Simplified maintenance: Through the automatic venting function, the frequency of manual maintenance is reduced, and the equipment maintenance cost is lowered. Wide applicability: It can be applied to various low-density liquid systems and has a simple design and is easy to install.

[0004] Therefore, developing a new type of automatic exhaust valve device to solve the problem of gas accumulation and achieve automated exhaust has become an urgent technical challenge. Utility Model Content

[0005] To solve the above problems, this utility model provides an automatic exhaust valve. To achieve the above technical objectives and effects, this utility model is implemented through the following technical solution:

[0006] An automatic venting valve includes a housing with an inner cavity inside, and a float that can float up and down inside the cavity; the float includes a first float and a second float with a density less than the first float, disposed below the first float.

[0007] Furthermore, the first float is a polypropylene float, and the second float is a foamed polypropylene float. This ensures that the floats can both float on the liquid surface and withstand high temperatures. The use of foamed polypropylene reduces the density of the floats. Polypropylene ensures that it does not deform at high temperatures, thus extending its service life.

[0008] Furthermore, the first pontoon and the second pontoon are welded together using ultrasonic welding.

[0009] Furthermore, the first buoy and the second buoy are engaged. Specifically, the outer periphery of the first buoy is provided with a protrusion, and the second buoy is provided with a receiving cavity that can accommodate the lower end of the first buoy. The inner periphery of the receiving cavity is provided with a groove that cooperates with the protrusion. More specifically, the protrusion is an annular protrusion with a cross-section of oblique triangle, which facilitates pressing and engaging with the annular groove provided in the receiving cavity.

[0010] The upper end of the float is assembled to the lower end of the stainless steel connecting rod, and the upper end of the stainless steel connecting rod is assembled to the vent cover. An O-ring is provided in the inner groove of the vent cover. The vent cover is pressed onto the vent valve housing by a nut. An O-ring is provided between the vent cover and the vent valve housing to prevent gas leakage.

[0011] Furthermore, the upper part of the float is equipped with a hook that connects to a stainless steel connecting rod. When the gas accumulates to a certain amount, the liquid level drops, and the stainless steel connecting rod moves downward with the float, thereby opening the vent to release excess gas. After the gas in the system is released, the float drives the stainless steel connecting rod to close the vent, shutting off the exhaust channel and preventing liquid from flowing out of the inner cavity.

[0012] Furthermore, a sealing gasket is installed on the stainless steel connecting rod for sealing, and the gasket is opened and closed by the movement of the stainless steel connecting rod.

[0013] Furthermore, the upper end of the stainless steel connecting rod is provided with a circular buckle hole that matches the connecting post at the lower end of the exhaust cover. The circular buckle hole at the upper end of the stainless steel connecting rod allows rotation via the connecting post at the lower end of the exhaust cover.

[0014] Furthermore, the upper end of the buoy is equipped with a barb, which is hooked to the lower end of the stainless steel connecting rod.

[0015] This utility model offers the following advantages: The exhaust valve provided by this utility model has an automatic exhaust function, automatically opening the exhaust port when gas accumulates without manual intervention, thereby improving work efficiency and reducing manual maintenance. The use of polypropylene and foamed polypropylene materials ensures the float has good high-temperature resistance and buoyancy, extending its service life. The O-rings and sealing gaskets in the design effectively prevent gas leakage, ensuring sealing during the exhaust process. This exhaust valve is suitable for liquid systems with low-density media, featuring high reliability, simplified maintenance, and wide applicability, making it highly valuable for widespread application. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of a specific embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of the external structure of a specific embodiment of the present utility model.

[0018] Figure Labels

[0019] 1. Exhaust cover, 2. O-ring, 3. Sealing gasket, 4. Stainless steel connecting rod, 5. Turning cap, 6. Nut, 7. Exhaust valve housing, 8. Float, 9. Float body. Detailed Implementation

[0020] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0021] An automatic venting valve includes an automatic venting valve housing body (7). When liquid is injected into the system, the gas in the system needs to be vented. The venting valve needs to be opened manually, that is, the cap (5) needs to be loosened. When a certain amount of gas accumulates in the inner cavity of the automatic venting valve, the weight of the float (8) is greater than the buoyancy of the float. The float (8) descends, causing the stainless steel connecting rod to rotate (4) and open the vent port in the vent cover (1) for automatic venting. When the gas in the system is vented, the weight of the float (8) is less than the buoyancy. The float (8) rises, causing the stainless steel connecting rod to rotate (4) and close the vent port in the vent cover (1), and the automatic venting ends.

[0022] The float includes a first float and a second float with a lower density, located below the first float. To ensure the float (8) can both float on the liquid surface and withstand high temperatures, in this embodiment, the first float is designed as a polypropylene float, and a second float, made of foamed polypropylene, is located at the lower end of the polypropylene float. The first and second floats are ultrasonically welded together. The use of foamed polypropylene reduces the density of the float. Polypropylene ensures that it does not deform at high temperatures, thus improving its service life.

[0023] The upper end of the float (8) is mounted on the lower end of the stainless steel connecting rod (4). The upper end of the stainless steel connecting rod (4) is mounted on the exhaust cover (1). An O-ring (2) is provided in the groove inside the exhaust cover (1). The exhaust cover (1) is pressed onto the exhaust valve housing (7) by a nut. An O-ring (2) is provided between the exhaust cover (1) and the exhaust valve housing (7) to prevent gas leakage.

[0024] The upper end of the stainless steel connecting rod (4) is provided with a circular buckle hole that matches the connecting post at the lower end of the exhaust cover (1). The circular buckle hole at the upper end of the stainless steel connecting rod (4) is rotated through the connecting post at the lower end of the exhaust cover (1).

[0025] The stainless steel connecting rod (4) and the exhaust cover (1) are sealed by a sealing gasket (3). The stainless steel connecting rod (4) rotates to drive the sealing gasket. The sealing gasket achieves the function of automatically venting and closing by pressing and releasing the exhaust port.

[0026] The upper end of the pontoon (8) is provided with a barb, which is hung on the lower end of the stainless steel connecting rod (4).

[0027] In summary, this invention utilizes the up-and-down movement of the float to automatically open and close the exhaust valve, thus achieving gas discharge. Furthermore, the float material possesses excellent high-temperature resistance and density advantages, and the sealing structure employs a combination of sealing gaskets and O-rings to ensure effective gas discharge when the valve automatically opens and reliable sealing when closed. Compared to existing technologies, the exhaust valve of this invention features a simple structure, ease of use, and high reliability, making it suitable for large-scale application.

[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model based on the technical solution and its improved concept should be covered within the protection scope of the present utility model.

Claims

1. An automatic vent valve characterized by: The utility model provides a shell is provided with inner chamber in the shell, and the chamber has the buoy that can float up and down, the buoy is connected by two parts of different density, the buoy includes first buoy, the second buoy of density less than first buoy is arranged in the lower side of first buoy, the first buoy is polypropylene buoy, the second buoy is foamed polypropylene buoy, the first buoy and the second buoy are welded together through ultrasonic.

2. An automatic vent valve as defined in claim 1, wherein: The first buoy and the second buoy are clamped.

3. An automatic vent valve as defined in claim 1, wherein: The upper end of the buoy is assembled at the lower end of the stainless steel connecting rod, the upper end of the stainless steel connecting rod is assembled with the exhaust cover, the O-ring is arranged in the recess on the inner side of the exhaust cover, the exhaust cover is pressed on the exhaust valve shell through the nut, the O-ring is arranged between the exhaust cover and the exhaust valve shell to prevent gas leakage.

4. An automatic vent valve as defined in claim 1, wherein: The upper part of the buoy is provided with a hook connected with the stainless steel connecting rod.

5. An automatic vent valve as defined in claim 4, wherein: The stainless steel connecting rod is provided with a sealing gasket for sealing, and the sealing gasket is opened and closed by the action of the stainless steel connecting rod.

6. An automatic vent valve as defined in claim 5, wherein: The upper end of the stainless steel connecting rod is provided with a circular buckle hole matched with the connecting column arranged at the lower end of the exhaust cover, and the circular buckle hole arranged at the upper end of the stainless steel connecting rod is rotated through the connecting column arranged at the lower end of the exhaust cover.

7. An automatic vent valve as defined in claim 1, wherein: The upper end of the buoy is provided with a barb, and the barb arranged at the upper end of the buoy is hung at the lower end of the stainless steel connecting rod.

Images