Round hollow sealing ring for nuclear power valve

Abstract

The invention provides a circular hollow sealing ring for a nuclear power valve, and belongs to the technical field of sealing rings. Comprising a sealing ring main body, the sealing ring main body comprises an outer ring and an inner ring, an inner sealing ring is arranged on the inner ring of the sealing ring main body, the inner sealing ring is solid, the inner sealing ring is made of flexible graphite packing, an installation groove is formed in the outer ring of the sealing ring main body, a middle sealing ring is arranged in the installation groove, and the middle sealing ring is arranged in the middle sealing ring. A top sealing ring is arranged above the middle sealing ring, and a bottom sealing ring is arranged below the middle sealing ring. The sealing ring can be automatically repaired through a high-temperature or high-pressure environment when the sealing ring is micro-cracked or damaged, the service life and reliability of the sealing ring are improved, the service life of the sealing ring is prolonged, the performance of the sealing ring at the extreme temperature is improved, meanwhile, the radiation absorption agent is added, the radiation aging resistance of the sealing ring is improved, and the service life of the sealing ring is prolonged. And the radiation tolerance of the sealing ring is enhanced.

Description

Technical Field

[0001] This invention relates to the field of sealing ring technology, and in particular to a circular hollow sealing ring for nuclear power valves. Background Technology

[0002] The circular hollow sealing ring used in nuclear power plant valves is usually one of the key safety components, playing a role in preventing fluid leakage, improving sealing performance, and ensuring the normal operation of the valve. However, existing circular hollow sealing rings have insufficient sealing performance in actual use, are prone to aging, have a short service life, require frequent replacement, increase costs, and have poor ability to cope with harsh environments. Therefore, this application provides a circular hollow sealing ring for nuclear power valves to meet the requirements. Summary of the Invention

[0003] 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 of insufficient sealing performance, easy aging, short service life, need for frequent replacement, increased cost, and poor ability to cope with harsh environments of existing circular hollow sealing rings in specific use.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A circular hollow sealing ring for nuclear power valves includes: a sealing ring body, the sealing ring body comprising an outer ring and an inner ring, the inner ring of the sealing ring body having an inner sealing ring, the inner sealing ring being solid and made of flexible graphite packing, the outer ring of the sealing ring body having an installation groove, the installation groove having a middle sealing ring inside, the middle sealing ring having a top sealing ring above it, and the middle sealing ring having a bottom sealing ring below it, both the top and bottom sealing rings being hollow, the top and bottom sealing rings having a first hollow buffer cavity and a second hollow buffer cavity respectively inside, the middle sealing ring having a hollow cavity inside, the hollow cavity having a plurality of sealing components inside, the sealing ring body being hollow, and the sealing ring body having a plurality of honeycomb-shaped hollow buffer chambers inside, each of the hollow buffer chambers being filled with thermoplastic resin.

[0005] In one possible implementation, both the top and bottom sealing rings are made of shape memory alloy, ensuring that they can adaptively adjust to changes in pressure, temperature, and radiation environment, thereby ensuring a long-term stable sealing effect.

[0006] In one possible implementation, both the first and second hollow buffer cavities are filled with radiation absorbers to enhance the sealing ring's resistance to radiation. The sealing ring body is made of fluororubber, and radiation absorbers and anti-aging additives are added to the fluororubber.

[0007] In one possible implementation, the sealing assembly includes a solid sealing block made of fluororubber and located inside a hollow cavity. A positioning block is provided at one end of the solid sealing block inside the hollow cavity, and the positioning block is integrally connected to the hollow cavity. Placement surfaces are provided at the top and bottom of one end of the solid sealing block outside the central sealing ring. The two placement surfaces are respectively provided with a first contact edge and a second contact edge, and both the first contact edge and the second contact edge are integrally connected to the solid sealing block.

[0008] In one possible implementation, the solid sealing block has a third hollow buffer cavity inside, and the third hollow buffer cavity is filled with thermoplastic resin.

[0009] In one possible implementation, the top sealing ring, bottom sealing ring, middle sealing ring, sealing ring body, and solid sealing block are all covered with a self-lubricating coating or subjected to plasma surface treatment.

[0010] In one possible implementation, the top sealing ring, bottom sealing ring, middle sealing ring, sealing ring body, and solid sealing block are all covered with an anti-corrosion coating.

[0011] Compared with the prior art, the present invention has at least the following beneficial effects: By setting a honeycomb-shaped hollow buffer chamber inside the sealing ring body, the pressure distribution of the seal can be improved, the load-bearing capacity of the sealing ring can be increased, and the hollow buffer chamber can be filled with thermoplastic resin, which can automatically repair the sealing ring in the event of micro-cracks or damage through high temperature or high pressure environment, thereby improving the life and reliability of the sealing ring. By adding top and bottom sealing rings above and below the central sealing ring, the redundancy of the seal can be increased, improving safety and preventing a decrease in sealing performance due to the failure of one of the sealing rings. Furthermore, by treating the surfaces of the top, bottom, and central sealing rings and the sealing ring body, the sealing ring surfaces are made smooth, reducing the coefficient of friction. This reduces wear during valve opening and closing, and improves its durability and sealing effect. The addition of a self-lubricating coating effectively reduces friction, extends the service life of the sealing ring, and improves its performance under extreme temperatures. Additionally, the addition of a radiation absorber enhances the sealing ring's resistance to radiation aging, thereby increasing its tolerance to radiation.

[0012] The sealing components can improve the sealing performance of the central sealing ring. During use, the first and second contact edges of the solid sealing ring are firmly attached to the edge of the sealing element, thereby enabling the solid sealing block to seal the element to be sealed and improving the sealing performance of the sealing ring. Attached Figure Description

[0013] 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 one skilled in the relevant art to make and use the present disclosure.

[0014] Figure 1 A three-dimensional structural diagram of a circular hollow sealing ring for nuclear power plant valves; Figure 2 A cross-sectional schematic diagram of a circular hollow sealing ring used in nuclear power plant valves; Figure 3 A schematic cross-sectional view of the sealing assembly in a circular hollow sealing ring for nuclear power plant valves; Figure 4 This is a schematic diagram of the solid sealing block in a circular hollow sealing ring for nuclear power plant valves.

[0015] [Figure Labels] 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 mating edge; 705. Second mating edge; 706. Third hollow buffer cavity; 707. Hollow cavity; 8. Hollow buffer chamber; 9. Mounting groove.

[0016] 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 appended claims. Detailed Implementation

[0017] The circular hollow sealing ring for nuclear power valves provided by the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are listed as best and preferred embodiments, and other alternative methods may be used by those skilled in the art; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0018] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0019] In general, terms can be understood, at least in part, from their 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.

[0020] It is understood that the meanings of “on”, “above”, and “above” in this disclosure should be interpreted in the broadest sense, such that “on” means not only “directly on” something, but also includes something with an intermediary feature or layer, and that “above” or “above” means not only “on” something, but also includes something “above” or “above” without an intermediary feature or layer.

[0021] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0022] 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 including 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 having an installation groove 9, a middle sealing ring 6 being provided inside the installation groove 9, a top sealing ring 4 being provided above the middle sealing ring 6, and a bottom sealing ring 5 being provided below the middle sealing ring 6, both the top sealing ring 4 and the bottom sealing ring 5 being hollow, and a first hollow buffer being provided inside the top sealing ring 4 and the bottom sealing ring 5 respectively. The central sealing ring 6 has a hollow cavity 707 inside the punch cavity 401 and the second hollow buffer cavity 501. Several sealing components 7 are arranged inside the hollow cavity 707. The sealing ring body 1 is hollow and has several honeycomb-shaped hollow buffer chambers 8 inside. Each hollow buffer chamber 8 is filled with thermoplastic resin. By setting the honeycomb-shaped hollow buffer chambers 8 inside the sealing ring body 1, the pressure distribution of the seal can be improved, the load-bearing capacity of the sealing ring can be increased, and the thermoplastic resin filling the hollow buffer chambers 8 can automatically repair the sealing ring in the event of micro-cracks or damage through high temperature or high pressure environment, thereby improving the life and reliability of the sealing ring.

[0023] It should be further explained in this embodiment that both the top sealing ring 4 and the bottom sealing ring 5 are made of shape memory alloy, which ensures that they can adaptively adjust according to changes in pressure, temperature and radiation environment, thereby ensuring a long-term stable sealing effect.

[0024] It should be further explained in this embodiment that both the first hollow buffer cavity 401 and the second hollow buffer cavity 501 are filled with radiation absorbers to enhance the resistance of the sealing ring 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 nuclear power plants will accelerate the aging of materials, especially for elastomer materials such as rubber and plastics, in order to improve the radiation aging resistance of the sealing ring, radiation absorbers (such as carbon black and ceramic powder) can be added to enhance the resistance of the sealing ring to radiation.

[0025] In addition, the radiation resistance and oxidation resistance of materials can be further improved by using ultraviolet (UV) stabilizers or other anti-aging additives, reducing the cracking or aging problems of the sealing ring caused by radiation during long-term use.

[0026] like Figure 4As shown in the illustration, this embodiment requires further explanation. The sealing assembly 7 includes a solid sealing block 701 made of fluororubber, located within a hollow cavity 707. A positioning block 702 is provided at one end of the solid sealing block 701 within the hollow cavity 707, and the positioning block 702 is integrally connected to the hollow cavity 707. Placement surfaces 703 are provided at the top and bottom of the end of the solid sealing block 701 located outside the central sealing ring 6. The two placement surfaces 703 are respectively provided with a first contact edge 704 and a second contact edge 705. Through the configured sealing assembly... Component 7 can improve the sealing performance of the central sealing ring 6. During use, the first contact edge 704 and the second contact edge 705 of the solid sealing ring are firmly attached to the edge of the sealing element, thereby enabling the solid sealing block 701 to seal the element to be sealed and improving the sealing performance of the sealing ring. The first contact edge 704 and the second contact edge 705 are integrated with the solid sealing block 701. By adding a top sealing ring 4 and a bottom sealing ring 5 above and below the central sealing ring 6, the redundancy of the seal can be increased, the safety can be improved, and the decrease in sealing performance due to the failure of one of the sealing rings can be avoided.

[0027] In this embodiment, it should be further explained that a third hollow buffer cavity 706 is provided inside the solid sealing block 701. The third hollow buffer cavity 706 is filled with thermoplastic resin. The top sealing ring 4, bottom sealing ring 5, middle sealing ring 6, sealing ring body 1, and the surface of the solid sealing block 701 are all covered with a self-lubricating coating or undergo plasma surface treatment. The surfaces of the top sealing ring 4, bottom sealing ring 5, middle sealing ring 6, sealing ring body 1, and solid sealing block 701 are all covered with an anti-corrosion coating. By treating the surfaces of the top sealing ring 4, bottom sealing ring 5, middle sealing ring 6, and sealing ring body 1, the sealing ring surface is made smooth, reducing the coefficient of friction. This can reduce wear during valve opening and closing, 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 under extreme temperatures. At the same time, a radiation absorber is added to improve the anti-radiation aging performance of the sealing ring, thereby enhancing the sealing ring's resistance to radiation.

[0028] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0029] Those skilled in the art will understand that all or part of the steps in the above-mentioned embodiment method can be completed by instructing the relevant 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.

[0030] 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 principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A circular hollow sealing ring for nuclear power valves, It is 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, the inner sealing ring (3) being made of flexible graphite packing, the outer ring of the sealing ring body (1) being provided with a mounting groove (9), the interior of the mounting groove (9) being provided with a middle sealing ring (6), the upper part of the middle sealing ring (6) being provided with a top sealing ring (4), the lower part of the middle sealing ring (6) being provided with a bottom sealing ring (5), the top sealing ring (5) being provided with a bottom sealing ring (6), and the bottom sealing ring (5) being provided with a bottom sealing ring (6). The sealing ring (4) and the bottom sealing ring (5) are both hollow, the top sealing ring (4) and the bottom sealing ring (5) are respectively provided with a first hollow buffer cavity (401) and a second hollow buffer cavity (501), the middle sealing ring (6) is provided with a hollow cavity (707), a plurality of sealing components (7) are provided inside the hollow cavity (707), the sealing ring body (1) is hollow, and a plurality of honeycomb hollow buffer bins (8) are provided inside the sealing ring body (1), and each of the hollow buffer bins (8) is filled with thermoplastic resin.

2. The circular hollow sealing ring for nuclear power valve according to claim 1, It 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, It 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, It is characterized in that The sealing assembly (7) comprises a solid sealing block (701), the solid sealing block (701) being made of fluororubber and being located in a 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 to 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); the first fitting edge (704) and the second fitting edge (705) are both integrally connected to the solid sealing block (701).

5. The circular hollow sealing ring for nuclear power valve according to claim 4, It 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.

6. The circular hollow sealing ring for nuclear power valve according to claim 1, It 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.

7. The circular hollow sealing ring for nuclear power valve according to claim 1, It 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 an anti-corrosion coating.

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