A circular hollow sealing ring for nuclear power valves

Abstract

The present invention provides a circular hollow sealing ring for nuclear power valves, belonging to the technical field of sealing rings; comprising a sealing ring body, the sealing ring body comprising an outer ring and an inner ring, the inner ring of the sealing ring body being provided with an inner sealing ring, the inner sealing ring being solidly provided, the inner sealing ring being made of flexible graphite packing, the outer ring of the sealing ring body being provided with an installation groove, the interior of the installation groove being provided with a middle sealing ring, the upper part of the middle sealing ring being provided with a top sealing ring, and the lower part of the middle sealing ring being provided with a bottom sealing ring. The present invention can automatically repair the sealing ring through a high temperature or high pressure environment when the sealing ring is micro-cracked or damaged, thereby improving the life and reliability of the sealing ring, extending the service life of the sealing ring, and improving its performance under extreme temperatures, while adding a radiation absorbent to improve the radiation aging resistance of the sealing ring, thereby enhancing the radiation tolerance of the sealing ring.

Description

Technical Field

[0001] The invention relates to the technical field of sealing rings, and in particular to a circular hollow sealing ring for a nuclear power valve. Background Art

[0002] The circular hollow sealing ring used in nuclear power valves is usually one of the key safety components, which plays a role in preventing fluid leakage, improving sealing performance and ensuring the normal operation of the valve;

[0003] However, the existing circular hollow sealing rings have insufficient sealing performance during specific use, are prone to aging, have a short service life, need to be replaced frequently, increase costs, and have poor ability to cope with harsh environments. Therefore, the present application provides a circular hollow sealing ring for nuclear power valves to meet the needs. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a circular hollow sealing ring for nuclear power valves to solve the problems that the existing circular hollow sealing rings have insufficient sealing performance during specific use, are prone to aging, have a short service life, need to be replaced frequently, increase costs, and have poor ability to cope with harsh environments.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A circular hollow sealing ring for a nuclear power valve comprises: a sealing ring body, the sealing ring body comprises an outer ring and an inner ring, the inner ring of the sealing ring body is provided with an inner sealing ring, the inner sealing ring is solid, the inner sealing ring is made of flexible graphite packing, the outer ring of the sealing ring body is provided with an installation groove, a middle sealing ring is provided inside the installation groove, a top sealing ring is provided above the middle sealing ring, a bottom sealing ring is provided below the middle sealing ring, the top sealing ring and the bottom sealing ring are both hollow, a first hollow buffer cavity and a second hollow buffer cavity are respectively provided inside the top sealing ring and the bottom sealing ring, a hollow cavity is provided inside the middle sealing ring, a plurality of sealing components are provided inside the hollow cavity, the sealing ring body is hollow, and a plurality of honeycomb hollow buffer bins are provided inside the sealing ring body, and each of the hollow buffer bins is filled with thermoplastic resin.

[0007] In a possible implementation, the top sealing ring and the bottom sealing ring are both made of shape memory alloy to ensure that they can be adaptively adjusted according to changes in pressure, temperature and radiation environment, thereby ensuring a long-term stable sealing effect.

[0008] In a possible implementation, the first hollow buffer cavity and the second hollow buffer cavity are filled with radiation absorbent to enhance the sealing ring's tolerance to radiation. The sealing ring body is made of fluororubber, and radiation absorbent and anti-aging additives are added to the fluororubber.

[0009] In one possible implementation, the sealing assembly includes a solid sealing block, which is made of fluororubber and is located in a hollow cavity. A positioning block is provided at one end of the solid sealing block located in the hollow cavity, and the positioning block is integrally connected to the hollow cavity. A placement surface is provided at the top and bottom of one end of the solid sealing block located outside the middle sealing ring, and the two placement surfaces are respectively provided with a first fitting edge and a second fitting edge, and the first fitting edge and the second fitting edge are both integrally connected to the solid sealing block.

[0010] In a possible implementation manner, a third hollow buffer cavity is disposed inside the solid sealing block, and the interior of the third hollow buffer cavity is filled with thermoplastic resin.

[0011] In a possible implementation, the surfaces of the top sealing ring, the bottom sealing ring, the middle sealing ring, the sealing ring body and the solid sealing block are all covered with a self-lubricating coating or subjected to plasma surface treatment.

[0012] In a possible implementation, the top sealing ring, the bottom sealing ring, the middle sealing ring, the sealing ring body and the surface of the solid sealing block are all covered with an anti-corrosion coating.

[0013] Compared with the prior art, the present invention has at least the following beneficial effects:

[0014] By setting a honeycomb-shaped hollow buffer chamber inside the sealing ring body, the pressure distribution of the seal can be improved, the bearing capacity of the sealing ring can be increased, and the hollow buffer chamber is filled with thermoplastic resin. When the sealing ring is micro-cracked or damaged, it can be automatically repaired in a high temperature or high pressure environment, thereby improving the life and reliability of the sealing ring;

[0015] By adding top and bottom sealing rings above and below the middle sealing ring, the redundancy of the seal can be increased, the safety can be improved, and the degradation of sealing performance due to the failure of one of the sealing rings can be avoided. By processing the surfaces of the top sealing ring, the bottom sealing ring, the middle sealing ring and the sealing ring body, the surface of the sealing ring is made smooth and the friction coefficient is reduced, which can reduce wear during valve switching and improve its durability and sealing effect. By providing a self-lubricating coating, friction can be effectively reduced, the service life of the sealing ring can be extended, and its performance under extreme temperatures can be improved. At the same time, radiation absorbers are added to improve the sealing ring's anti-radiation aging performance, thereby enhancing the sealing ring's tolerance to radiation.

[0016] The sealing assembly provided can improve the sealing performance of the middle sealing ring. When in use, the first fitting edge and the second fitting edge of the solid sealing ring are firmly fitted to the edge of the seal, so that the solid sealing block seals the seal, thereby improving the sealing performance of the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable those skilled in the relevant art to make and use the present disclosure.

[0018] Figure 1 This is a three-dimensional structural diagram of a circular hollow sealing ring for nuclear power valves;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of a circular hollow sealing ring for a nuclear power valve;

[0020] Figure 3 It is a schematic diagram of the cross-sectional structure of a sealing component in a circular hollow sealing ring for a nuclear power valve;

[0021] Figure 4 This is a schematic diagram of the structure of a solid sealing block in a circular hollow sealing ring for nuclear power valves.

[0022] [Reference Signs]

[0023] 1. Sealing ring body; 2. Inner ring; 3. Inner sealing ring; 4. Top sealing ring; 401. First hollow buffer cavity; 5. Bottom sealing ring; 501. Second hollow buffer cavity; 6. Middle sealing ring; 7. Sealing assembly; 701. Solid sealing block; 702. Positioning block; 703. Placement surface; 704. First fitting edge; 705. Second fitting edge; 706. Third hollow buffer cavity; 707. Hollow cavity; 8. Hollow buffer bin; 9. Installation groove.

[0024] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the attached claims. DETAILED DESCRIPTION

[0025] The following is a detailed description of a circular hollow sealing ring for a nuclear power valve provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are listed as the best and preferred embodiments, and other alternatives can also be used by technicians in some known technical fields; and the accompanying drawings are only for more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0026] It should be noted that the references to "one embodiment", "embodiment", "exemplary embodiment", "some embodiments" and the like in the specification indicate that the described embodiments may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0027] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0028] It will be understood that the meaning of “on,” “over,” and “above” in this disclosure should be interpreted in the broadest manner, so that “on” not only means “directly on” something, but also includes the meaning of being “on” something with intervening features or layers therebetween, and “on” or “over” not only means “on” or “above” something, but also includes the meaning of being “on” or “above” something with no intervening features or layers therebetween.

[0029] Additionally, spatially relative terms such as "under," "beneath," "lower," "above," "upper," and the like may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as shown in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein may be similarly interpreted accordingly.

[0030] like Figure 1 - Figure 4As shown, an embodiment of the present invention provides a circular hollow sealing ring for a nuclear power valve, comprising: a sealing ring body 1, the sealing ring body 1 comprising an outer ring and an inner ring 2, the inner ring 2 of the sealing ring body 1 is provided with an inner sealing ring 3, the inner sealing ring 3 is solid, the inner sealing ring 3 is made of flexible graphite packing, the outer ring of the sealing ring body 1 is provided with a mounting groove 9, a middle sealing ring 6 is provided inside the mounting groove 9, a top sealing ring 4 is provided above the middle sealing ring 6, a bottom sealing ring 5 is provided below the middle sealing ring 6, the top sealing ring 4 and the bottom sealing ring 5 are both hollow, and the top sealing ring 4 and the bottom sealing ring 5 are respectively provided with a first hollow buffer The punching cavity 401 and the second hollow buffer cavity 501, a hollow cavity 707 is arranged inside the middle sealing ring 6, and a plurality of sealing components 7 are arranged inside the hollow cavity 707. The sealing ring body 1 is hollow, and a plurality of honeycomb hollow buffer chambers 8 are arranged inside the sealing ring body 1. Each hollow buffer chamber 8 is filled with thermoplastic resin. By arranging the honeycomb hollow buffer chamber 8 inside the sealing ring body 1, the pressure distribution of the seal can be improved, and the bearing capacity of the sealing ring can be increased. By filling the hollow buffer chamber 8 with thermoplastic resin, the sealing ring can be automatically repaired through high temperature or high pressure environment when it is micro-cracked or damaged, thereby improving the life and reliability of the sealing ring.

[0031] It should be further explained in this embodiment that the top sealing ring 4 and the bottom sealing ring 5 are both made of shape memory alloy, ensuring that they can adaptively adjust according to changes in pressure, temperature and radiation environment, thereby ensuring a long-term stable sealing effect, so that they can adaptively adjust according to changes in pressure, temperature and radiation environment, thereby ensuring a long-term stable sealing effect.

[0032] What needs to be further explained in this embodiment is that the first hollow buffer cavity 401 and the second hollow buffer cavity 501 are filled with radiation absorbers to enhance the sealing ring's tolerance to radiation. The sealing ring body 1 is made of fluororubber, and radiation absorbers and anti-aging additives are added to the fluororubber. Since the radiation environment of a nuclear power plant will accelerate the aging of materials, especially for elastomeric materials such as rubber and plastic, in order to improve the sealing ring's anti-radiation aging performance, radiation absorbers (such as carbon black, ceramic powder) can be added to enhance the sealing ring's tolerance to radiation.

[0033] In addition, ultraviolet (UV) stabilizers or other anti-aging additives can be used to further enhance the material's radiation and oxidation resistance, thereby reducing the risk of cracks or aging of the seal ring caused by radiation during long-term use.

[0034] like Figure 4As shown, it is necessary to further explain that the sealing assembly 7 includes a solid sealing block 701, which is made of fluororubber and is located in the hollow cavity 707. A positioning block 702 is provided at one end of the solid sealing block 701 located in the hollow cavity 707. The positioning block 702 is integrally connected with the hollow cavity 707. A placement surface 703 is provided at the top and bottom of one end of the solid sealing block 701 located outside the middle sealing ring 6. The two placement surfaces 703 are respectively provided with a first fitting edge 704 and a second fitting edge 705. By setting the sealing assembly Component 7 can make the sealing performance of the middle sealing ring 6 better. When in use, the first fitting edge 704 and the second fitting edge 705 of the solid sealing ring are firmly fitted to the edge of the seal, so that the solid sealing block 701 seals the seal, thereby improving the sealing performance of the sealing ring. The first fitting edge 704 and the second fitting edge 705 are both integrally connected to the solid sealing block 701. By adding a top sealing ring 4 and a bottom sealing ring 5 above and below the middle sealing ring 6, the redundancy of the seal can be increased, the safety can be improved, and the decline in sealing performance due to the failure of one of the sealing rings can be avoided.

[0035] It should be further explained in this embodiment that a third hollow buffer cavity 706 is arranged inside the solid sealing block 701, and the interior of the third hollow buffer cavity 706 is filled with a filled thermoplastic resin. The surfaces of the top sealing ring 4, the bottom sealing ring 5, the middle sealing ring 6, the sealing ring body 1 and the solid sealing block 701 are all covered with a self-lubricating coating or are undergoing plasma surface treatment. The surfaces of the top sealing ring 4, the bottom sealing ring 5, the middle sealing ring 6, the sealing ring body 1 and the solid sealing block 701 are all covered with an anti-corrosion coating. By treating the surfaces of the top sealing ring 4, the bottom sealing ring 5, the middle sealing ring 6 and the sealing ring body 1, the surfaces of the sealing rings are made smooth and the friction coefficient is reduced, which can reduce wear during valve switching and improve its durability and sealing effect. The self-lubricating coating can effectively reduce friction, extend the service life of the sealing ring, and improve its performance at extreme temperatures. At the same time, a radiation absorber is added to improve the radiation aging resistance of the sealing ring to enhance the radiation tolerance of the sealing ring.

[0036] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0037] A person skilled in the art will appreciate that all or part of the steps in the above-mentioned embodiment method can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc.

[0038] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A circular hollow sealing ring for nuclear power valves, characterized in that: include: A sealing ring body (1), the sealing ring body (1) comprising an outer ring and an inner ring (2), the inner ring (2) of the sealing ring body (1) being provided with an inner sealing ring (3), the inner sealing ring (3) being solid and made of flexible graphite packing, the outer ring of the sealing ring body (1) being provided with a mounting groove (9), a middle sealing ring (6) being provided inside the mounting groove (9), a top sealing ring (4) being provided above the middle sealing ring (6), a bottom sealing ring (5) being provided below the middle sealing ring (6), the top sealing ring (4) and the bottom sealing ring (5) being both hollow, a first hollow buffer cavity (401) and a second hollow buffer cavity (501) being provided inside the top sealing ring (4) and the bottom sealing ring (5), respectively, a hollow cavity (707) being provided inside the middle sealing ring (6), a plurality of sealing components (7) being provided inside the hollow cavity (707), the sealing ring body The body (1) is hollow, and a plurality of honeycomb-shaped hollow buffer chambers (8) are arranged inside the sealing ring body (1), and each of the hollow buffer chambers (8) is filled with thermoplastic resin. The sealing assembly (7) comprises a solid sealing block (701), and the solid sealing block (701) is made of fluororubber, and the solid sealing block (701) is located in the hollow cavity (707). One end of the solid sealing block (701) located in the hollow cavity (707) is provided with A positioning block (702), the positioning block (702) being integrally connected to the hollow cavity (707), the solid sealing block (701) being provided with a placement surface (703) at the top and bottom of one end located outside the middle sealing ring (6), the two placement surfaces (703) being provided with a first fitting edge (704) and a second fitting edge (705), respectively, the first fitting edge (704) and the second fitting edge (705) being integrally connected to the solid sealing block (701).

2. The circular hollow sealing ring for nuclear power valves according to claim 1 is characterized in that: The top sealing ring (4) and the bottom sealing ring (5) are both made of shape memory alloy, ensuring that they can be adaptively adjusted according to changes in pressure, temperature and radiation environment, thereby ensuring a long-term stable sealing effect.

3. The circular hollow sealing ring for nuclear power valve according to claim 1 is characterized in that: The first hollow buffer cavity (401) and the second hollow buffer cavity (501) are both filled with radiation absorbent to enhance the sealing ring's tolerance to radiation. The sealing ring body (1) is made of fluororubber, and the radiation absorbent and anti-aging additive are added to the fluororubber.

4. The circular hollow sealing ring for nuclear power valve according to claim 1 is characterized in that: A third hollow buffer cavity (706) is provided inside the solid sealing block (701), and the interior of the third hollow buffer cavity (706) is filled with thermoplastic resin.

5. The circular hollow sealing ring for nuclear power valve according to claim 1 is characterized in that: The surfaces of the top sealing ring (4), the bottom sealing ring (5), the middle sealing ring (6), the sealing ring body (1), and the solid sealing block (701) are all covered with a self-lubricating coating or are subjected to plasma surface treatment.

6. The circular hollow sealing ring for nuclear power valve according to claim 1, characterized in that: The surfaces of the top sealing ring (4), the bottom sealing ring (5), the middle sealing ring (6), the sealing ring body (1) and the solid sealing block (701) are all covered with an anti-corrosion coating.

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