Leak-proof containment air isolation valve

Abstract

The utility model discloses a leakproof containment air isolation valve which comprises an electric actuator, the top end of the electric actuator is in threaded connection with an indicator lamp base, the top end of the indicator lamp base is provided with an indicator lamp, the outer surface of the indicator lamp base is provided with a plurality of first screw holes, and the top end of the electric actuator is provided with a threaded hole. The outer surface of the bottom of the electric actuator is in threaded connection with a fixing plate, a plurality of threaded holes are formed in the outer surface of the fixing plate, and threaded holes corresponding to the threaded holes in the outer surface of the fixing plate are formed in the bottom of the electric actuator; an oil tank is fixedly connected to the bottom of the fixing plate, an oil injection opening is formed in the outer surface of the oil tank, a valve body is fixedly connected to the bottom of the oil tank, and a valve rod is installed at the output end of the electric actuator. By means of the structure, the opening and closing state of the valve can be rapidly and visually recognized, and the potential leakage risk is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, and particularly relates to a containment air isolation valve with anti-leakage function. Background Art

[0002] The containment air isolation valve is a key device specially designed for nuclear power plants or other facilities that require strict control of air quality and environmental safety. This valve is installed at the air inlet and outlet of the containment. Its main function is to control the inflow and outflow of air during normal operation to maintain the internal pressure and atmospheric conditions, and to quickly close in case of accidents or harmful events to isolate the internal environment and prevent radioactive or toxic gases from leaking into the external environment. The design of the containment air isolation valve usually has high sealing performance and reliability to ensure effective protection of public and environmental safety under extreme conditions.

[0003] When applying for the present invention, the applicant, through retrieval, found that a Chinese patent disclosed a "containment air isolation valve" with the application number "CN200720155227.9". This patent mainly includes a valve body, a valve rod provided in the valve body, and a disc plate connected to the valve rod through a pin shaft. The valve body is connected to an electric device through a bracket and studs. The electric device is provided with a valve rod nut connected to the valve rod. The valve rod and the valve body are sealed through packing. The bottom end of the valve body is connected to a bottom cover, and the bottom end of the valve rod is connected to a cushion block. A sealing ring is pressed on the disc plate through a pressure ring and pressure ring bolts. One to four circumferential grooves are provided in the circumferential direction of the sealing ring.

[0004] However, this device is not equipped with an indicator light and an anti-leakage device, and has obvious safety and operation disadvantages. First of all, the lack of an indicator light makes it difficult for operators to quickly understand the current state (open or closed) of the valve, which may lead to a response delay in case of an emergency and increase the risk of operation errors. In addition, the absence of an anti-leakage device means that the valve may have minor leaks due to wear or other mechanical failures during long-term use. This may cause unsafe leakage of radioactive or toxic substances in key facilities such as nuclear power plants, and may even affect public health and environmental safety in severe cases. Therefore, the design of this valve has significant deficiencies in ensuring the reliability and safety of facility operation.

[0005] Therefore, we propose a containment air isolation valve with anti-leakage function. Content of the Utility Model

[0006] The utility model provides a containment air isolation valve with anti-leakage function, which can quickly understand the current open / closed state of the valve and has an anti-leakage device.

[0007] To achieve the above object, a leak-proof containment air isolation valve is provided. A leak-proof containment air isolation valve includes an electric actuator. The top of the electric actuator is threadedly connected to an indicator base. An indicator light is installed on the top of the indicator base. A plurality of first screw holes are provided on the outer surface of the indicator base. Threaded holes are provided at the top of the electric actuator. The threaded holes correspond to the first screw holes on the outer surface of the indicator base. The outer surface of the bottom of the electric actuator is threadedly connected to a fixing plate. A plurality of threaded holes are provided on the outer surface of the fixing plate. Threaded holes corresponding to the threaded holes on the outer surface of the fixing plate are provided at the bottom of the electric actuator. A fuel tank is fixedly connected to the bottom of the fixing plate. An oil filling port is provided on the outer surface of the fuel tank. A valve body is fixedly connected to the bottom of the fuel tank. The output end of the electric actuator is equipped with a valve stem. The valve stem extends from the output end of the electric actuator to the bottom of the valve body.

[0008] According to the leak-proof containment air isolation valve described above, a cavity is provided inside the fuel tank. Through holes are provided at the centers of both ends of the valve body. The diameter of the through holes matches the outer diameter of the valve stem.

[0009] According to the leak-proof containment air isolation valve described above, lubricating oil is filled inside the cavity. Sealing rings are installed around the through holes.

[0010] According to the leak-proof containment air isolation valve described above, a plurality of second screw holes are provided on both sides of the valve body. The second screw holes are evenly distributed along the outer surfaces of both sides of the valve body.

[0011] According to the leak-proof containment air isolation valve described above, a valve seat is provided inside the valve body. A butterfly plate is fixedly connected to the outer surface of the valve stem.

[0012] According to the leak-proof containment air isolation valve described above, a lower shaft sleeve and an upper shaft sleeve are movably connected to the outer surface of the valve stem. The lower shaft sleeve and the upper shaft sleeve are arranged inside the valve body.

[0013] According to the leak-proof containment air isolation valve described above, an annular groove is provided on the outer surfaces of the lower shaft sleeve and the upper shaft sleeve. An O-ring is assembled inside the groove.

[0014] Advantages of the present utility model: By threadedly connecting an indicator base to the top of the electric actuator and installing an indicator on the top of the base, the operator can quickly and intuitively identify the open / closed state of the valve. This design effectively improves operation safety and convenience, especially in environments with insufficient light or limited visibility; By filling lubricating oil inside the fuel tank and using a sealing ring, not only can continuous lubrication be provided for the valve stem to reduce wear, but also because of the relatively high density of the lubricating oil, a dense protective layer can be formed between mechanical components, effectively blocking the penetration of gas. In a high-pressure or variable-pressure environment, the lubricating oil can prevent air and other gases from leaking through tiny gaps, thereby maintaining the system's enclosure and pressure stability, enhancing the sealing performance of the entire valve system, reducing potential leakage risks, and extending the service life of the equipment; Through the threaded connection design between the electric actuator and the fixing plate, assembly and disassembly become simpler. This design facilitates daily maintenance and necessary component replacement, reducing maintenance costs and downtime; By providing annular grooves on the outer surfaces of the lower bushing and the upper bushing and fitting O-rings, the sealing performance inside the valve is further enhanced, effectively preventing any possible tiny leakage and ensuring the efficient and safe operation of the system.

[0015] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. Brief Description of the Drawings

[0016] The present utility model will be further described below in conjunction with the drawings and embodiments;

[0017] Figure 1 Is a perspective view of an anti-leakage containment air isolation valve of the present utility model;

[0018] Figure 2 Is a side view of an anti-leakage containment air isolation valve of the present utility model;

[0019] Figure 3 Is a cross-sectional view of an anti-leakage containment air isolation valve of the present utility model;

[0020] Figure 4 Is a top view of an anti-leakage containment air isolation valve of the present utility model.

[0021] Legend Explanation:

[0022] 1. Electric actuator; 2. Valve body; 3. Indicator; 4. Fuel tank; 5. Fixing plate; 6. Oil filling port; 7. First screw hole; 8. Valve stem; 9. Butterfly plate; 10. Indicator base; 11. Second screw hole; 12. Valve seat; 13. Lower bushing; 14. Upper bushing. Detailed Description of the Preferred Embodiment

[0023] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The function of the accompanying drawings is to supplement the description of the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present utility model. However, it should not be construed as a limitation on the protection scope of the present utility model. Embodiment

[0024] Referring to Figures 1 to 4 , an air isolation valve for a leak-proof containment of the present utility model embodiment includes an electric actuator 1. A lamp holder 10 is threadedly connected to the top of the electric actuator 1. A lamp 3 is installed on the top of the lamp holder 10. A plurality of first screw holes 7 are formed on the outer surface of the lamp holder 10. Threaded holes are formed at the top of the electric actuator 1, and the threaded holes correspond to the first screw holes 7 on the outer surface of the lamp holder 10. A fixing plate 5 is threadedly connected to the outer surface of the bottom of the electric actuator 1. A plurality of threaded holes are formed on the outer surface of the fixing plate 5, and threaded holes corresponding to the threaded holes on the outer surface of the fixing plate 5 are formed at the bottom of the electric actuator 1. An oil tank 4 is fixedly connected to the bottom of the fixing plate 5. An oil filling port 6 is provided on the outer surface of the oil tank 4. A valve body 2 is fixedly connected to the bottom of the oil tank 4. A valve stem 8 is installed at the output end of the electric actuator 1, and the valve stem 8 extends from the output end of the electric actuator 1 to the bottom of the valve body 2. The lamp 3 is of the LED type to provide a visual status indication with low energy consumption and long life, ensuring clear visibility even in long-distance and low-light environments.

[0025] A cavity is provided inside the oil tank 4. Through holes are formed at the centers of both ends of the valve body 2, and the diameter of the through holes matches the outer diameter of the valve stem 8. The valve body 2 is made of high-strength carbon steel, having excellent mechanical strength and compressive resistance to adapt to high-pressure environments.

[0026] Lubricating oil is filled inside the cavity. A sealing ring is installed around the through holes. The sealing ring is made of silicone material, which not only provides excellent sealing performance but also can resist extreme temperature changes and is suitable for variable-temperature environments.

[0027] A plurality of second screw holes 11 are formed on both sides of the valve body 2. The second screw holes 11 are evenly distributed along the outer surfaces of both sides of the valve body 2. The second screw holes 11 are treated with rust prevention to ensure that the screw holes are not easily damaged in humid or corrosive environments, extending the service life of the valve.

[0028] A valve seat 12 is provided inside the valve body 2. A butterfly plate 9 is fixedly connected to the outer surface of the valve stem 8. The butterfly plate 9 is designed to be streamlined to reduce the resistance and eddy current when fluid passes through, improving the fluid dynamic performance of the valve.

[0029] The outer surface of the valve stem 8 is movably connected with a lower shaft sleeve 13 and an upper shaft sleeve 14. The lower shaft sleeve 13 and the upper shaft sleeve 14 are arranged inside the valve body 2. Both the lower shaft sleeve 13 and the upper shaft sleeve 14 are made of wear-resistant materials, such as hardened alloy, to reduce friction and wear and improve the operation smoothness.

[0030] An annular groove is provided on the outer surfaces of the lower shaft sleeve 13 and the upper shaft sleeve 14. An O-ring is assembled in the groove. The O-ring assembled in the annular groove is designed as a self-lubricating material, such as a composite material containing polytetrafluoroethylene PTFE. This material not only provides excellent sealing effect, but also reduces the maintenance requirements because it reduces the dependence on lubricating oil.

[0031] Working principle: First, the electric actuator 1 serves as the main power source to control the opening and closing of the entire valve. When it is necessary to open or close the valve, the electric actuator 1 rotates the valve stem 8 through its output end. The valve stem 8 then drives the butterfly plate 9 to rotate through its fixed connection with the butterfly plate 9. The valve stem 8 is supported by the lower shaft sleeve 13 and the upper shaft sleeve 14 during the operation. Both of these shaft sleeves are located inside the valve body 2. The surfaces of the shaft sleeves are provided with annular grooves, and self-lubricating O-rings are installed inside. The O-ring made of this composite material containing polytetrafluoroethylene PTFE not only provides excellent sealing effect, but also reduces the additional lubrication requirements due to its self-lubricating characteristics. The lubricating oil in the oil tank 4 forms a continuous oil film between the moving parts of the valve, such as the valve stem 8 and the oil tank 4. This oil film acts as a physical barrier to prevent gas from escaping through the tiny gaps. Due to the viscosity and surface tension of the lubricating oil, it can fill and cover the fine cracks or irregular surfaces, thereby reducing the chance of gas passing through these spaces. The lubricating oil can be filled through the 6 on the outer surface of the oil tank 4. When the electric actuator 1 receives the opening or closing command, the indicator light 3 is connected to the electric actuator 1 through the internal circuit and will first display a green light, indicating that the system is starting up and ready to execute the command. During the process of the valve moving to the open position, the indicator light 3 will display a yellow light, indicating that the valve is in operation. This color change reminds the operator that the valve is in a dynamic state and has not reached the final position. Once the valve is fully opened or closed, the indicator light 3 will turn red or blue. Red can indicate that the valve is fully closed, while blue indicates that the valve is fully opened. Such color differentiation helps the operator quickly identify the current state of the valve without further inspection. If the system detects an error or fault at any operation stage, the indicator light 3 will flash red or display other warning colors, such as orange, warning the operator to check the system and take corresponding maintenance measures.

[0032] The above has described the embodiments of the present invention in detail with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the knowledge scope of those of ordinary skill in the art in the said technical field, various changes can be made without departing from the purpose of the present invention.

Claims

1. A leakproof containment air isolation valve, comprising an electric actuator (1), characterized in that: The top of the electric actuator (1) is threadedly connected to an indicator light base (10), and an indicator light (3) is installed on the top of the indicator light base (10). The outer surface of the indicator light base (10) is provided with a plurality of first screw holes (7). The top of the electric actuator (1) is provided with a threaded hole, and the threaded hole corresponds to the first screw hole (7) on the outer surface of the indicator light base (10). The outer surface of the bottom of the electric actuator (1) is threadedly connected to a fixing plate (5), and the outer surface of the fixing plate (5) is provided with a plurality of threaded holes. The bottom of the electric actuator (1) is provided with threaded holes corresponding to the threaded holes on the outer surface of the fixing plate (5). The bottom of the fixing plate (5) is fixedly connected to an oil tank (4), and an oil filling port (6) is provided on the outer surface of the oil tank (4). The bottom of the oil tank (4) is fixedly connected to a valve body (2). A valve stem (8) is installed on the output end of the electric actuator (1), and the valve stem (8) extends from the output end of the electric actuator (1) to the bottom of the valve body (2).

2. A leakproof containment air isolation valve according to claim 1, characterized in that: The oil tank (4) is provided with a cavity inside, and the centers of both ends of the valve body (2) are provided with through holes, the diameter of the through holes matching the outer diameter of the valve stem (8).

3. The leakproof containment air isolation valve according to claim 2, characterized in that: The cavity is filled with lubricating oil, and a sealing ring is installed around the perforation.

4. The leakproof containment air isolation valve according to claim 1, characterized in that: A plurality of second screw holes (11) are provided on both sides of the valve body (2), and the second screw holes (11) are evenly distributed along the outer surfaces of both sides of the valve body (2).

5. The leakproof containment air isolation valve according to claim 1, characterized in that: A valve seat (12) is arranged inside the valve body (2), and a butterfly plate (9) is fixedly connected to the outer surface of the valve stem (8).

6. The leakproof containment air isolation valve according to claim 1, characterized in that: The outer surface of the valve stem (8) is movably connected with a lower shaft sleeve (13) and an upper shaft sleeve (14), and the lower shaft sleeve (13) and the upper shaft sleeve (14) are arranged inside the valve body (2).

7. The leakproof containment air isolation valve according to claim 6, characterized in that: The outer surfaces of the lower shaft sleeve (13) and the upper shaft sleeve (14) are provided with an annular groove, and an O-ring is installed in the groove.

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