Sealing ring with core rod and sealing structure

Abstract

The utility model is applicable to the technical field of sealing, and provides a sealing ring with a core rod and a sealing structure, the sealing ring with the core rod comprises a main body part and the core rod, and the sealing structure comprises a first sealing part, a second sealing part and the sealing ring with the core rod. Before the two sealing parts are pressed to be in the flat attaching state, firstly, the core rod can play a role in limiting the compression amount, the main body part can be prevented from being crushed when the two sealing parts are close to each other, and therefore a limiting structure does not need to be additionally designed to prevent the main body part from being crushed when the sealing structure is adopted. And in addition, the core rod firstly plays a supporting role, so that the outer wall of the main body part can be more tightly attached to the sealing surface on the sealing component while the main body part is prevented from being crushed, and the sealing performance and the sealing effect of the main body part are effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to sealing technical field especially relates to a sealing ring with core rod and sealing structure. BACKGROUND

[0002] Nuclear power generation is an important new energy generation technology, nuclear fission energy instead of chemical energy of fossil fuels, nuclear reactors and steam generators to replace the boiler of thermal power generation, steam turbine to generate electricity. The current nuclear power unit mainly includes nuclear reactor, steam generator, turbine, generator and power regulation control system and other equipment. Nuclear power plant nuclear reactor pressure vessel is placed in the nuclear reactor and bears the huge operating pressure of the sealed container, is the core of the pressurized water reactor nuclear power plant, which is mainly composed of top cover flange and container. The reactor is in a high temperature and high pressure alternating state during normal operation, and the top cover flange and the container must be completely sealed without any leakage. At present, the sealing ring is mostly used to seal the top cover flange and the container, but the existing sealing ring has the problem of poor pressure capacity and easy to be crushed. SUMMARY

[0003] The utility model discloses a sealing ring with core rod and sealing structure, which aims to solve the technical problem of poor pressure capacity and easy to be crushed of the sealing ring in the prior art.

[0004] The utility model discloses a sealing ring with core rod and sealing structure, which aims to solve the technical problem of poor pressure capacity and easy to be crushed of the sealing ring in the prior art.

[0005] The main body part is annular and is provided with an annular accommodating cavity, and the main body part and the accommodating cavity are coaxially arranged.

[0006] The core rod is annular, is adapted to be installed inside the accommodating cavity, and is coaxially arranged with the accommodating cavity.

[0007] In an optional embodiment, the main body part includes an outer sealing layer and an inner supporting layer, the inner supporting layer surrounds to form the accommodating cavity, the outer sealing layer is covered outside the inner supporting layer, the hardness of the outer sealing layer is less than that of the inner supporting layer, and the rigidity of the outer sealing layer is also less than that of the inner supporting layer.

[0008] In an optional embodiment, the outer sealing layer has a first opening part, and the first opening part is formed along the circumference of the main body part, and the inner supporting layer also has a second opening part, and the second opening part is formed along the circumference of the main body part.

[0009] In an optional embodiment, the first opening portion is located on a side of the outer sealing layer facing away from the pressure source, and the second opening portion is located on a side of the inner supporting layer facing away from the pressure source, and the first opening portion is located opposite to the second opening portion.

[0010] In an optional embodiment, the main body portion further comprises an elastic structure layer, which is located inside the inner supporting layer and surrounds the accommodating cavity, and the elastic structure layer is used to provide elastic support to the inner supporting layer when the inner supporting layer is deformed.

[0011] In an optional embodiment, the elastic structure layer comprises a spring, which abuts against the inner wall of the inner supporting layer.

[0012] In an optional embodiment, the cross section of the core rod is circular.

[0013] In an optional embodiment, the diameter of the cross section of the core rod is greater than the inner diameter of the spring when the spring is compressed to the maximum deformation amount, and the diameter of the cross section of the core rod is less than the inner diameter of the spring when the spring is not compressed.

[0014] In an optional embodiment, the core rod is made of stainless steel or nickel-based superalloy;

[0015] and / or, the spring is made of stainless steel or nickel-based superalloy;

[0016] and / or, the inner supporting layer is made of stainless steel or nickel-based superalloy.

[0017] In a second aspect, a sealing structure is provided, comprising a first sealing portion and a second sealing portion, and further comprising the sealing ring with a core rod as described in any one of the above embodiments, which is located between the first sealing portion and the second sealing portion to seal when the two are pressed against each other, and the first sealing portion and the second sealing portion are spaced apart under the support of the sealing ring with a core rod.

[0018] The technical effect of the first aspect relative to the prior art is that: by arranging the accommodating cavity in the form of a ring and coaxially with the main body part in the interior of the main body part, and by fitting and mounting the core rod in the form of a whole ring in the accommodating cavity, and by arranging the core rod coaxially with the accommodating cavity, compared with the sealing ring in the prior art, the sealing ring is arranged between two sealing components in use, and before the two sealing components are pressed to be flat, the core rod can first play a role of limiting the compression amount, so that the main body part can be prevented from being crushed when the two sealing components approach, and therefore, when the sealing structure is sealed, there is no need to additionally design a limiting structure to prevent the main body part from being crushed, and the structure of the sealing structure can be effectively simplified, thereby saving the processing cost. In addition, the core rod can first play a supporting role, which prevents the main body part from being crushed, and at the same time, enables the outer wall of the main body part to be more closely attached to the sealing surface on the sealing component, thereby effectively improving the sealing performance and sealing effect of the main body part.

[0019] It can be understood that the beneficial effects of the second aspect described above can be referred to the related description in the first aspect described above, and will not be described here again. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments of the present application or the prior art description. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0021] Figure 1 is a structural schematic view of the sealing ring with a core rod provided by the embodiments of the present application;

[0022] Figure 2 is Figure 1 is a sectional view structure schematic view along the line A-A in the figure;

[0023] Figure 3 is Figure 2 is an enlarged structure schematic view of the position B in the figure;

[0024] Figure 4 Figure 3 is a sectional view structure schematic view along the line C-C in the figure;

[0025] Figure 5 is a schematic view of the sealing structure provided by the embodiments of the present application.

[0026] BRIEF DESCRIPTION OF DRAWINGS

[0027] 100, sealing ring; 200, first sealing part; 300, second sealing part;

[0028] 1, main body; 11, outer sealing layer; 12, inner support layer; 13, elastic structure layer; 131, spring; 14, containing cavity; 2, core rod; 3, first opening part; 4, second opening part. DETAILED DESCRIPTION

[0029] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0030] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0031] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0032] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] In order to make the purpose, technical scheme and advantages of the present application more clear and obvious, the present application will be further described in detail below with reference to the drawings and examples.

[0034] Please refer to Figures 1 to 4As shown in the utility model embodiment, in the first aspect, provide a kind of sealing ring with mandrel, including main part 1 and mandrel 2, main part 1 is annular, and is equipped with annular accommodating cavity 14, main part 1 and accommodating cavity 14 coaxially arranged.Mandrel 2 is annular, and mandrel 2 is adapted to be installed in the accommodating cavity 14 inside mandrel and accommodating cavity 14 coaxially arranged, mandrel 2 is used to support main part 1 when main part 1 is extruded, to avoid main part 1 being crushed.

[0035] Specifically, main part 1 refers to the main part of the sealing ring, and the main part 1 is generally annular, which can provide better sealing effect for the sealing ring. The main part 1 can be composed of a single component, such as a single metal component. The main part 1 can also be composed of multiple components, such as multiple layers of metal with different hardness and elastic structure. The accommodating cavity 14 refers to a cavity structure with a certain accommodating space. The accommodating cavity 14 is also annular, and the accommodating cavity 14 is coaxially arranged with the main part 1. The mandrel 2 refers to a rigid component with a certain length and hardness, and the mandrel 2 is arranged in the accommodating cavity 14 and along the circumference of the main part 1, so that the mandrel 2 forms a complete annular structure inside the accommodating cavity 14.

[0036] The sealing ring with mandrel provided by the utility model embodiment has the accommodating cavity 14 arranged inside the main part 1 in an annular shape and coaxially arranged with the main part 1, and the mandrel 2 in an overall annular shape is adapted to be installed in the accommodating cavity 14, and the mandrel 2 is coaxially arranged with the accommodating cavity 14. Compared with the sealing ring in the prior art, the sealing ring is arranged between two sealing components during use. Before the two sealing components are pressed to a flat state, the mandrel 2 can first limit the compression amount, which can prevent the main part 1 from being crushed when the two sealing components approach. Therefore, there is no need to design a limiting structure to prevent the main part 1 from being crushed during sealing, which can effectively simplify the structure of the sealing structure and save processing cost. In addition, the mandrel 2 can first play a supporting role, which can prevent the main part 1 from being crushed, and make the outer wall of the main part 1 more tightly fit with the sealing surface of the sealing component, effectively improving the sealing performance and sealing effect of the main part 1.

[0037] It should be noted that, since the mandrel 2 is in an annular structure, the mandrel 2 can support the main part 1 in the radial direction in addition to the direction of extrusion along the sealing component.

[0038] In one embodiment, please refer to Figure 3 And Figure 4The main body 1 comprises an outer sealing layer 11 and an inner supporting layer 12. The inner supporting layer 12 is arranged to form a containing cavity 14. The outer sealing layer 11 is arranged outside the inner supporting layer 12. The hardness of the outer sealing layer 11 is less than that of the inner supporting layer 12. The rigidity of the outer sealing layer 11 is also less than that of the inner supporting layer 12. Specifically, the outer sealing layer 11 refers to a layered structure with a certain thickness. The outer sealing layer 11 is usually made of soft metal materials with good fluidity, such as aluminum, silver, nickel, gold, etc. The inner supporting layer 12 also refers to a layered structure with a certain thickness. The inner supporting layer 12 is usually made of materials with good rigidity, such as stainless steel or nickel-based high-temperature alloy. The outer sealing layer 11 and the inner supporting layer 12 are both annular structures. The cross-sectional shape of the outer sealing layer 11 and the inner supporting layer 12 can be a complete ring or a "C" shape. By arranging the outer sealing layer 11 with small hardness and rigidity outside the inner supporting layer 12 with large hardness and rigidity, when the main body 1 is extruded, the outer sealing layer 11 can plastically deform to fill the small unevenness and defects on the surface of the two sealing components. At the same time, the inner supporting layer 12 can support the outer sealing layer 11 to a certain extent, so that the main body 1 can maintain its original shape without much change. After plastic deformation, the outer sealing layer 11 can still tightly adhere to the surface of the sealing component. By combining the outer sealing layer 11 and the inner supporting layer 12, the main body 1 can have good compression and rebound performance while maintaining good sealing performance.

[0039] In one embodiment, referring to Figure 3 The outer sealing layer 11 has a first opening part 3 extending along the circumference of the main body 1. The inner supporting layer 12 also has a second opening part 4 extending along the circumference of the main body 1. Specifically, the first opening part 3 refers to an opening structure with a certain width arranged on the outer sealing layer 11. The length direction of the first opening part 3 extends along the circumference of the main body 1. The second opening part 4 refers to an opening structure with a certain width arranged on the inner supporting layer 12. The length direction of the second opening part 4 extends along the circumference of the main body 1. By arranging the first opening part 3 on the outer sealing layer 11, a deformation space can be provided for the plastic deformation of the outer sealing layer 11, preventing the outer sealing layer 11 from wrinkling and affecting its mechanical properties when deformed. In addition, by arranging the second opening part 4 on the inner supporting layer 12, a space can be provided for the deformation of the inner supporting layer 12, so that the inner supporting layer 12 can have a certain amount of elastic compression. When the inner supporting layer 12 is extruded, it can elastically deform to offset the external pressure, while still supporting the outer sealing layer 11, thereby improving the sealing performance of the main body 1.

[0040] In one embodiment, referring to Figure 3The first opening part 3 is located on the side of the outer sealing layer 11 away from the pressure source, and the second opening part 4 is located on the side of the inner supporting layer 12 away from the pressure source. The first opening part 3 is located opposite to the second opening part 4. Specifically, the pressure source refers to the position with relatively large pressure when the two sealing parts contact each other, or the position of the fastening screw connecting the two sealing parts. The pressure source can be located inside or outside the ring of the sealing ring. When the pressure source is located inside the ring of the sealing ring, i.e., the fastening screw connecting the sealing parts is located inside the ring of the main body 1, the first opening part 3 is located on the outer side of the outer sealing layer 11. When the pressure source is located outside the ring of the sealing ring, i.e., the fastening screw connecting the sealing parts is located outside the main body 1, the first opening part 3 is located on the inner side of the outer sealing layer 11.

[0041] Similarly, the second opening part 4 is located on the side of the inner supporting layer 12 away from the pressure source. When the pressure source is located inside the ring of the sealing ring, i.e., the fastening screw connecting the sealing parts is located inside the ring of the main body 1, the second opening part 4 is located on the outer side of the inner supporting layer 12. When the pressure source is located outside the ring of the sealing ring, i.e., the fastening screw connecting the sealing parts is located outside the main body 1, the second opening part 4 is located on the inner side of the inner supporting layer 12. By locating the first opening part 3 on the side of the outer sealing layer 11 away from the pressure source and locating the second opening part 4 on the side of the inner supporting layer 12 away from the pressure source, when the main body 1 bears radial pressure, the influence of the first opening part 3 or the second opening part 4 on the main body 1 is reduced, so that the main body 1 still has good radial pressure resistance on the basis of the first opening part 3 or the second opening part 4, and the sealing performance of the sealing ring is improved.

[0042] In addition, the opposite arrangement of the first opening part 3 and the second opening part 4 allows the first opening part 3 and the second opening part 4 to form a channel for connecting the containing cavity 14 with the outside, so that the pressure medium can enter the containing cavity 1414 through the first opening part 3 and the second opening part 4, and the main body 1 can be supported to a certain extent by the pressure medium, thereby increasing the pressure resistance of the main body 1 to a certain extent.

[0043] In one embodiment, please refer to Figure 3 and Figure 4The main body 1 further comprises an elastic structure layer 13, which is arranged inside the inner support layer 12 and forms a containing cavity 14, and is used to provide elastic support for the inner support layer 12 when the inner support layer 12 is deformed. Specifically, the elastic structure layer 13 refers to a component with elastic deformation capability, and can be a spring piece, a spring 131 or a high polymer elastic material. By arranging the elastic structure layer 13 inside the inner support layer 12, elastic support is provided for the inner support layer 12 when the inner support layer 12 is deformed, which can further increase the compression resilience of the main body 1 as a whole and improve the sealing performance of the main body 1 during operation.

[0044] In one embodiment, referring to Figure 4 The elastic structure layer 13 comprises a spring 131, which abuts against the inner side of the inner support layer 12. Specifically, the spring 131 refers to an elastic structure formed by spirally winding a metal rod or a metal wire, and can be elastically deformed in the axial direction and the radial direction. By abutting the spring 131 against the inner side of the inner support layer 12, the spring 131 can be squeezed in the radial direction when the inner support layer 12 is deformed under pressure, so that the spring 131 is deformed in the radial direction, thereby providing elastic support for the inner support layer 12. Through the interaction between the inner support layer 12 and the spring 131, the compression resilience of the main body 1 is better.

[0045] In one embodiment, referring to Figure 3 The cross section of the core rod 2 is circular. Specifically, the cross section of the core rod 2 refers to a cross section taken by a reference plane perpendicular to the plane in which the core rod 2 is arranged and in the radial direction of the core rod 2. By setting the cross section of the core rod 2 to be circular, the core rod 2 can disperse the pressure received by its shape, so that the core rod 2 can withstand greater pressure. At the same time, the core rod 2 has a ring structure as a whole, so that the core rod 2 can withstand greater radial pressure while withstanding greater pressure from the sealing component.

[0046] In one embodiment, referring to Figure 3 The diameter of the cross section of the core rod 2 is greater than the inner diameter of the spring 131 when the spring 131 is compressed to the maximum deformation amount, and is less than the inner diameter of the spring 131 when the spring 131 is not compressed. Specifically, by setting the diameter of the cross section of the core rod 2 to be less than the inner diameter of the spring 131 when the spring 131 is not compressed, the core rod 2 is more convenient to install into the spring 131. In addition, the diameter of the cross section of the core rod 2 is greater than the inner diameter of the spring 131 when the spring 131 is compressed to the maximum deformation amount, so that the support effect of the main body 1 can be achieved before the spring 131 is crushed again, effectively improving the anti-crushing performance of the sealing ring and making the sealing effect of the sealing ring better.

[0047] In one embodiment, referring to Figure 3, the mandrel 2 is made of stainless steel or nickel-based superalloy material, and / or the spring 131 is made of stainless steel or nickel-based superalloy material, and / or the inner support layer 12 is made of stainless steel or nickel-based superalloy material. Specifically, both stainless steel and nickel-based superalloy refer to materials with good strength and good corrosion resistance. By using stainless steel or nickel-based superalloy material for the mandrel 2, the spring 131, and the inner support layer 12, the service life of the sealing ring is longer.

[0048] In an optional embodiment, referring to Figure 3 The outer sealing layer 11 and the inner support layer 12 are both formed by bending a component with a certain length and welding the two ends. The outer sealing layer 11 has only one welding point, and the inner support layer 12 also has only one welding point. Reducing the welding points can reduce the risk of the outer sealing layer 11 and the inner support layer 12 breaking, and improve the overall compression resistance of the main body 1.

[0049] In another optional embodiment, referring to Figure 3 The two ends of the spring 131 are welded together to form a ring, so that the entire spring 131 has only one welding point. Reducing the welding points on the spring 131 can reduce the risk of the spring 131 breaking under stress, thereby increasing the compression resistance of the spring 131.

[0050] In a second aspect, referring to Figure 5 A sealing structure is provided, which includes a first sealing part 200 and a second sealing part 300, and further includes the sealing ring 100 with a mandrel according to any one of the above embodiments. The sealing ring 100 with a mandrel is located between the first sealing part 200 and the second sealing part 300 to seal when they are pressed against each other, and the first sealing part 200 and the second sealing part 300 are spaced apart under the support of the sealing ring 100 with a mandrel. Since the sealing ring 100 with a mandrel has good compression resistance and will not be crushed even under a large pressure, no additional limiting structure is needed between the first sealing part 200 and the second sealing part 300 to prevent the sealing ring from being crushed, making the overall structure of the sealing structure simpler, the assembly of the sealing structure more convenient, and the production cost lower.

[0051] The above is only a preferred embodiment of the present application, and only the technical principle of the present application is specifically described. These descriptions are only to explain the principle of the present application, and cannot be interpreted as a limitation on the protection scope of the present application in any way. Based on the above explanation, any modification, equivalent replacement, and improvement made within the spirit and principles of the present application, and other specific embodiments of the present application that can be conceived by those skilled in the art without creative labor, should be included in the protection scope of the present application.

Claims

1. A seal ring with a mandrel, characterized in that, The application relates to a sealing ring with a core rod, comprising: a main body part in a ring shape and provided with a ring-shaped accommodating cavity coaxially arranged with the main body part; a core rod in a ring shape and adapted to be mounted inside the accommodating cavity, the core rod being coaxially arranged with the accommodating cavity and used for supporting the main body part to avoid the main body part from being crushed when the main body part is extruded.

2. The core-barred seal ring of claim 1, wherein The main body part comprises an outer sealing layer and an inner supporting layer, the inner supporting layer is arranged around the accommodating cavity, and the outer sealing layer is arranged outside the inner supporting layer, the hardness of the outer sealing layer is smaller than that of the inner supporting layer, and the rigidity of the outer sealing layer is also smaller than that of the inner supporting layer.

3. The core-barred seal ring of claim 2, wherein, The outer sealing layer is provided with a first opening part extending along the circumference of the main body part, and the inner supporting layer is also provided with a second opening part extending along the circumference of the main body part.

4. The core bar mounted seal ring of claim 3 wherein, The first opening part is located on the side of the outer sealing layer away from the pressure source, the second opening part is located on the side of the inner supporting layer away from the pressure source, and the first opening part is oppositely arranged with the second opening part.

5. A core-barred seal ring as claimed in any one of claims 2 to 4, characterised in that, The main body part further comprises an elastic structure layer arranged inside the inner supporting layer and around the accommodating cavity, and the elastic structure layer is used for providing elastic support for the inner supporting layer when the inner supporting layer is deformed.

6. The core bar mounted seal ring of claim 5 wherein, The elastic structure layer comprises a spring abutting against the inner wall of the inner supporting layer.

7. The core-barred seal ring of claim 6, wherein The cross section of the core rod is circular.

8. The sealing ring with a core rod according to claim 7, wherein the diameter of the cross section of the core rod is greater than the inner diameter of the spring when the spring is compressed to the maximum deformation, and the diameter of the cross section of the core rod is smaller than the inner diameter of the spring when the spring is not compressed.

9. The sealing ring with a core rod according to claim 8, wherein: the core rod is made of stainless steel or nickel-based superalloy; and / or the spring is made of stainless steel or nickel-based superalloy; and / or the inner supporting layer is made of stainless steel or nickel-based superalloy.

10. A seal structure, characterized by, The application further relates to a sealing device comprising a first sealing part and a second sealing part, and the sealing ring with a core rod according to any one of claims 1 to 9 is arranged between the first sealing part and the second sealing part to seal when the two sealing parts are extruded, and the first sealing part and the second sealing part are spaced apart under the support of the sealing ring with a core rod.

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