Airtight valve

Abstract

The utility model provides an airtight valve. The device comprises an annular ring and a supporting column arranged in the annular ring, two symmetrical circulation openings are formed between the supporting column and the annular ring, blades for sealing the circulation openings are arranged on the two sides of the supporting column, and the blades are rotationally connected to the supporting column through hinges. Each hinge is provided with a driving part for driving the corresponding blade to rotate, the rotation directions of the two blades are opposite, limiting parts for limiting rotation of the blades are arranged on the inner wall of the annular ring, and sealing strips are arranged between the blades and the inner wall of the annular ring. The applicability of the airtight valve in the water tank overflow opening is improved.

Description

Technical Field

[0001] The present application relates to the technical field of airtight valves, and in particular, to an airtight valve. Background Art

[0002] In modern power production facilities, especially in environments with extremely high requirements for safety and reliability such as nuclear power plants, airtight valves, as one of the key control components, must be designed not only to take into account basic fluid control functions, but also to have the ability to work under complex working conditions. The design of traditional airtight valves often focuses on specific application scenarios. For example, they may only be optimized for single-direction fluid control or specific types of working environments. However, with the development of technology and the improvement of system safety requirements, single-function airtight valves can no longer meet increasingly complex operational needs.

[0003] In water tank overflow ports in nuclear power plants or other similar facilities, airtight valves face even more stringent working conditions. These conditions include not only extreme temperature and pressure changes, but also the requirement to respond quickly in an emergency to protect system integrity. Therefore, the design of the airtight valve must be able to adapt to a variety of working conditions. For example, it can discharge excess liquid in time when the water tank overflows, and when water needs to be pumped from the water tank, the other side of the sealing valve opens to inhale air to balance the air pressure, and at the same time quickly close when use is completed to prevent unnecessary loss or inflow.

[0004] Provide an airtight valve solution that can operate reliably in complex environments and is easy to install and maintain.

[0005] From the above, it can be seen that how to improve the applicability of the airtight valve in the water tank overflow port still needs to be solved. Utility Model Content

[0006] The present application provides an airtight valve that can solve the problem of low applicability of airtight valves in water tank overflow ports in related technologies. The technical solution is as follows:

[0007] According to one aspect of the present application, an airtight valve includes: an annular ring and a support column arranged in the annular ring, and two symmetrical flow openings are formed between the support column and the annular ring, blades are provided on both sides of the support column to close the flow openings, the blades are rotatably connected to the support column through hinges, the hinges are provided with a driving member for driving the blades to rotate, and the rotation directions of the two blades are opposite, a limiting member for limiting the rotation of the blades is provided on the inner wall of the annular ring, and a sealing strip is provided between the blades and the inner wall of the annular ring.

[0008] Through the above scheme, the airtight valve can adapt to different working modes through the two-way flow port. It can operate effectively whether it is necessary to discharge excess liquid or to introduce gas, which increases the functional diversity of the airtight valve and improves its applicability to different situations. A limiter is provided on the inner wall of the annular ring to limit the rotation range of the blade. The limiter ensures that the airtight valve can accurately position the blade under various working conditions, avoids leakage caused by improper position, and ensures that unexpected fluid can be effectively prevented from passing under any circumstances.

[0009] In an exemplary embodiment, the airtight valve further comprises: the driving member comprises a torsion spring sleeved on the hinge rotation axis.

[0010] With this solution, a torsion spring is mounted on the hinge's axis. When an external force (such as water pressure) pushes the blades away from their initial closed position, the torsion spring is twisted and stores energy. Once the external force disappears or decreases to a level insufficient to maintain the blades' current position, the torsion spring releases its stored energy, forcing the blades to automatically return to their initial closed position.

[0011] In an exemplary embodiment, the airtight valve further includes: the limiting member includes a plurality of limiting bolts arranged on the inner wall of the annular ring, and the limiting bolts are located on one side of the hinge rotation direction.

[0012] Through the above solution, the limit bolt plays an important role in the design of the airtight valve in limiting the rotation angle of the blade, ensuring the correct position of the blade, simplifying commissioning and maintenance, enhancing system safety and adapting to different working conditions, significantly improving the reliability and applicability of the airtight valve in practical applications.

[0013] In an exemplary embodiment, the airtight valve further comprises: the hinge is fixed to the support column by a fixing bolt, and the hinge is fixed to the blade by a fixing bolt.

[0014] Through the above solution, the role of fixing bolts in the design of airtight valves mainly includes ensuring structural stability, facilitating installation and disassembly, adjusting blade position, and simplifying production and assembly, which together improves the applicability and reliability of airtight valves in application scenarios such as power plant water tank overflow ports.

[0015] In an exemplary embodiment, the airtight valve further comprises: a fixing groove is provided on a side of the sealing strip close to the blade for the blade to be embedded in a side away from the support column.

[0016] Through the above solution, the fixed groove design on the sealing strip plays an important role in the airtight valve in enhancing the sealing performance, ensuring the accuracy of the blade position, reducing wear and increasing the service life, simplifying assembly and maintenance, and adapting to different working conditions.

[0017] In an exemplary embodiment, the airtight valve further includes: the sealing strip is an EPDM foam strip.

[0018] Through the above solution, the application of EPDM foam strips as sealing strips in airtight valves has the advantages of excellent sealing performance, chemical corrosion resistance and weather resistance, and good temperature adaptability.

[0019] The beneficial effects of the technical solution provided by this application are:

[0020] Through the two-way flow port, the airtight valve can adapt to different working modes. It can operate effectively whether it needs to discharge excess liquid or introduce gas, which increases the functional diversity of the airtight valve.

[0021] The linkage between the blades and the hinges enables the airtight valve to automatically adjust the position of the blades under different working conditions. For example, opening downward is suitable for overflow, while opening upward is suitable for pumping. The automatic adjustment of the blades reduces the need for manual intervention and improves the automation level and response speed of the system.

[0022] The limiter ensures that the airtight valve can accurately position the blades under various working conditions, avoiding leakage caused by improper positioning; the choice of sealing strips further enhances the sealing performance of the airtight valve, ensuring that unexpected fluid can be effectively prevented from passing under any circumstances. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without inventive efforts.

[0024] Figure 1 is a schematic structural diagram of an airtight valve according to an exemplary embodiment;

[0025] Figure 2 is a schematic structural diagram of a sealing strip in an airtight valve according to an exemplary embodiment;

[0026] Figure 3 It is a structural schematic diagram of an airtight valve in application according to an exemplary embodiment.

[0027] Figure numerals: 1, annular ring; 2, support column; 3, blade; 4, fixing bolt; 5, torsion spring; 6, limit bolt; 7, sealing strip; 8, fixing groove; 9, hinge. DETAILED DESCRIPTION

[0028] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and are not to be construed as limiting the present application.

[0029] It will be understood by those skilled in the art that, unless expressly stated otherwise, the singular forms "a", "an", "said" and "the" used herein may also include the plural forms. It should be further understood that the term "comprising" used in the specification of the present disclosure refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when we refer to an element as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may be intermediate elements. In addition, "connected" or "coupled" as used herein may include wireless connections or wireless couplings. The term "and / or" used herein includes all or any units and all combinations of one or more associated listed items.

[0030] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0031] See also Figure 1 , an embodiment of the present application provides an airtight valve, comprising: an annular ring 1 and a support column 2 fixed in the annular ring 1. It should be pointed out here that the annular ring 1 and the support column 2 are integrally processed and produced, and two symmetrical flow ports are formed between the support column 2 and the annular ring 1 (the position corresponding to the blade 3 in the figure). It should be pointed out here that when used for the overflow port of a power plant water tank, one flow port can be used for overflow, and the other flow port can be used for pumping or other working conditions. There is no limitation on which flow port is used here, and it depends on the actual installation situation of the airtight valve. Through the two-way flow port, the airtight valve can adapt to different working modes. Whether it is necessary to discharge excess liquid or to introduce gas, it can operate effectively, thereby increasing the functional diversity of the airtight valve.

[0032] Blades 3 that close the flow port are installed on both sides of the support column 2, and the blades 3 are rotatably connected to the support column 2 through hinges 9. It should be pointed out here that the hinges 9 are fixed to the support column 2 by fixing bolts 4, and the hinges 9 are also fixed to the blades 3 by fixing bolts 4. The fixing effect of the fixing bolts 4 can ensure that the blades 3 will not loosen or fall off during the opening and closing process, thereby improving the reliability of the airtight valve under various working conditions; at the same time, the standardized design of the fixing bolts 4 makes the production process simpler, and also facilitates assembly workers to quickly assemble on site.

[0033] A driving member for driving the blade 3 to rotate is installed on the hinge 9. In the embodiment of the present application, the driving member is a torsion spring 5 mounted on the rotating shaft of the hinge 9. The blade 3 is connected to the support column 2 through the hinge 9, and the torsion spring 5 in the hinge 9 allows the blade 3 to rotate in a set direction. The opposite rotation direction of the blade 3 means that one blade 3 opens downward and the other opens upward; this enables the airtight valve to automatically adjust the position of the blade 3 under different working conditions. For example, opening downward is suitable for overflow, while opening upward is suitable for pumping. The automatic adjustment of the blade 3 reduces the need for manual intervention and improves the automation level and response speed of the system.

[0034] In addition, the torsion spring 5 can adjust its elastic force according to actual needs, so that the airtight valve can better adapt to different working conditions, enhancing the adaptability of the airtight valve in different application scenarios; since the torsion spring 5 can automatically reset, no additional mechanical device or human intervention is required to close the airtight valve during the operation of the airtight valve, which simplifies the operation process. This design makes the airtight valve easier to use and maintain, reduces the workload of operators, and reduces the possibility of misoperation due to human factors.

[0035] A limiting member for limiting the rotation of the blade 3 is installed on the inner wall of the annular ring 1. In the embodiment of the present application, the limiting member includes a plurality of limiting bolts 6 arranged on the inner wall of the annular ring 1, and the limiting bolts 6 are located on one side of the rotation direction of the hinge 9.

[0036] First, the opening and closing angles of the blade 3 can be precisely controlled by the limiting bolt 6 to ensure that the blade 3 stops at a predetermined position, thereby avoiding mechanical damage or functional failure caused by excessive rotation of the blade 3 and enhancing the stability and reliability of the airtight valve; secondly, whether it is overflow or pumping, the blade 3 can work at a suitable position, thereby improving the efficiency and safety of the airtight valve; a sealing strip 7 is provided between the blade 3 and the inner wall of the annular ring 1.

[0037] At the same time, the position of the limit bolt 6 is adjustable. By adjusting the position of the limit bolt 6, the airtight valve can be easily debugged and maintained, so that the airtight valve can better adapt to different working environments and requirements, reducing maintenance time and cost.

[0038] To sum up, as a part of the limiting component, the limit bolt 6 plays an important role in the design of the airtight valve in limiting the rotation angle of the blade 3, ensuring that the blade 3 is correctly positioned, simplifying debugging and maintenance, enhancing system safety and adapting to different working conditions, which significantly improves the reliability and applicability of the airtight valve in practical applications.

[0039] See also Figure 2 A sealing strip 7 is installed between the blade 3 and the inner wall of the annular ring 1, and a fixing groove 8 is provided on the side of the sealing strip 7 close to the blade 3 for the blade 3 to be embedded on the side away from the support column 2. In addition, in the embodiment of the present application, the sealing strip 7 is made of EPDM foam strip.

[0040] Through the embedded design, the contact between the blade 3 and the sealing strip 7 is closer, which reduces the possibility of fluid leakage and ensures that the airtight valve has good sealing performance in the closed state; simplifies the assembly process of the airtight valve, and also facilitates the rapid inspection and replacement of the sealing strip 7 or the blade 3 during maintenance, thereby improving maintenance efficiency; and compared with other high-performance sealing materials, the EPDM foam strip has a better cost-effectiveness, which can not only meet the high performance requirements, but also control costs to a certain extent.

[0041] During the production of the airtight valve, the main body material and the blade 3 are made of aluminum alloy, and anodized to be suitable for the high-salt environment at the seaside. The hinge 9 and other accessories are made of 304 stainless steel. While ensuring the lightweight of the airtight valve, it can significantly improve its corrosion resistance and mechanical properties in the high-salt environment at the seaside, thereby ensuring the reliability and durability of the airtight valve in long-term use.

[0042] Reference Figure 3 When the airtight valve is installed for use, the annular ring 1 can be directly fixed on the pipeline by bolts and then it can be put into use.

[0043] Compared with related technologies, the airtight valve design in this application scheme can not only adapt to various complex working conditions such as the overflow port of the water tank in the power plant, but also improve the reliability, safety and maintenance convenience of the airtight valve, significantly enhancing its applicability in practical applications.

[0044] The above are only some of the implementation methods of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. An airtight valve, characterized in that: include: An annular ring (1) and a support column (2) arranged in the annular ring (1), and two symmetrical flow openings are formed between the support column (2) and the annular ring (1), and blades (3) for closing the flow openings are arranged on both sides of the support column (2), and the blades (3) are rotatably connected to the support column (2) through hinges (9), and the hinges (9) are provided with a driving member for driving the blades (3) to rotate, and the rotation directions of the two blades (3) are opposite, and a limiting member for limiting the rotation of the blades (3) is provided on the inner wall of the annular ring (1), and a sealing strip (7) is provided between the blades (3) and the inner wall of the annular ring (1).

2. The airtight valve according to claim 1, wherein: The airtight valve further comprises: the driving member comprises a torsion spring (5) sleeved on the rotating shaft of the hinge (9).

3. The airtight valve according to claim 1, wherein: The airtight valve further comprises: the limiting member comprises a plurality of limiting bolts (6) arranged on the inner wall of the annular ring (1), and the limiting bolts (6) are located on one side of the rotation direction of the hinge (9).

4. The airtight valve according to claim 1, wherein: The airtight valve further comprises: the hinge (9) is fixed to the support column (2) via a fixing bolt (4), and the hinge (9) is fixed to the blade (3) via a fixing bolt (4).

5. The airtight valve according to claim 1, wherein: The airtight valve further comprises: a fixing groove (8) is provided on the side of the sealing strip (7) close to the blade (3) for the blade (3) to be embedded on the side away from the support column (2).

6. The airtight valve according to claim 5, wherein: The airtight valve further comprises: the sealing strip (7) is an EPDM foam strip.

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