Sealing ring for large pressure vessel

Abstract

The utility model relates to the field of sealing, in particular to a sealing ring for a large pressure vessel, which comprises a main ring, grooves formed in two sides of the main ring, V-shaped springs clamped in the grooves, and a supporting piece arranged on one side, far away from the main ring, of each V-shaped spring, and the supporting piece is provided with two supporting surfaces attached to the V-shaped springs. Due to the fact that a sealing ring in a large pressure container can be subjected to pressure for a long time, after a large-size V-shaped spring is used in a high-pressure environment for a long time, the V-shaped spring deforms and lacks elastic force due to metal fatigue, and the sealing performance of the sealing ring is affected. Through the arrangement of the supporting piece, the two supporting faces of the supporting piece are attached to the V-shaped spring, the two supporting faces play a role in supporting the V-shaped spring, the V-shaped spring cannot deform due to the fact that the V-shaped spring is used in a high-pressure environment for a long time, and the effect of prolonging the service life of the V-shaped spring is achieved.

Description

Technical Field

[0001] This application relates to the field of sealing, and more particularly to a sealing ring for large pressure vessels. Background Technology

[0002] A sealing ring is a device used to prevent the leakage of liquids or gases. It is typically made of an elastic material and serves a sealing function. It consists of one or more ring-shaped components, fixed to a bearing race or washer, and contacting or forming a narrow labyrinth gap with another race or washer to prevent lubricating oil leakage and the intrusion of foreign objects. Sealing rings are classified according to their material, including silicone rubber sealing rings, fluororubber sealing rings, and polytetrafluoroethylene (PTFE) sealing rings.

[0003] The PTFE (polytetrafluoroethylene) sealing ring, also known as a PVC seal, is a high-performance sealing ring consisting of a special spring embedded within it. The PTFE seal utilizes the appropriate spring force combined with system fluid pressure to push the sealing surface forward and gently press it against the metal surface being sealed, thus producing an excellent sealing effect. The spring's actuation effect overcomes slight eccentricity of the metal surface and wear of the sealing lip, maintaining the expected sealing performance over time. PTFE seal springs come in various types, such as V-shaped springs, H-shaped springs, and helical springs, each with its unique characteristics and applications. When selecting a PTFE seal spring, factors such as specific working conditions, sealing requirements, and material compatibility must be comprehensively considered. V-shaped springs have a V-shaped cross-section, concentrating the load on the leading edge of the sealing lip, providing reliable wiping action for the seal. V-shaped springs are used in sealing applications with a large deformation range and high tolerance, such as pressure vessel sealing.

[0004] In related technologies, the V-shaped spring is positioned within a groove on the sealing ring, with the middle portion of the included angle of the V-shaped spring being hollowed out. The seal body relies on the V-shaped spring itself for support. When this type of V-shaped spring seal is used to seal large pressure vessels, the sealing area of ​​the pressure vessel is relatively large, requiring a larger seal size. Because the seal in the pressure vessel is subjected to pressure over a long period, for larger V-shaped spring seals, metal fatigue after prolonged use can cause the V-shaped spring to deform and lose its elasticity, affecting the seal's sealing performance. Utility Model Content

[0005] To address the problem that prolonged use of sealing rings in large pressure vessels can cause V-springs to deform and lose elasticity, reducing the lifespan of the V-springs and thus affecting the sealing performance of the sealing rings, this application provides a sealing ring for large pressure vessels.

[0006] This application provides a sealing ring for large pressure vessels, which adopts the following technical solution:

[0007] A sealing ring for a large pressure vessel includes a main ring, grooves formed on both sides of the main ring, a V-shaped spring fitted in the grooves, and a support member disposed on the side of the V-shaped spring away from the main ring, the support member having two support surfaces that fit against the V-shaped spring.

[0008] By adopting the above technical solution, a support member is provided on the side of the V-shaped spring away from the main ring. The two support surfaces of the support member are in contact with the V-shaped spring. When the sealing ring is used in a large pressure vessel, the V-shaped spring is deformed by pressure. The support member is located in the middle of the included angle of the V-shaped spring, and its two support surfaces support the V-shaped spring. When the V-shaped spring deforms, the support member also deforms accordingly. At this time, the two support surfaces are in contact with the V-shaped spring. The setting of the support member prevents the V-shaped spring from being damaged by excessive pressure, extends the service life of the V-shaped spring, and improves the pressure resistance of the sealing ring to a certain extent.

[0009] Optionally, the included angle formed by the two supporting surfaces is greater than the included angle formed by the V-shaped spring.

[0010] By adopting the above technical solution, the included angle formed by the two supporting surfaces that are in contact with the V-shaped spring is greater than the included angle formed by the V-shaped spring. When the sealing ring of the large pressure vessel is in an unpressurized state, the area of ​​contact between the two supporting surfaces and the V-shaped spring is small. When the sealing ring of the large pressure vessel is under pressure, the area of ​​contact between the two supporting surfaces and the V-shaped spring gradually increases with the increase of pressure. As the area of ​​contact between the two supporting surfaces and the V-shaped spring increases, the included angle between the two supporting surfaces gradually decreases, and the supporting component itself will also deform. By setting the included angle formed by the two supporting surfaces to be greater than the included angle formed by the V-shaped spring, the force of deformation of the supporting component itself and the force of the V-shaped spring on the supporting component cancel each other out, ensuring that the supporting component better performs its supporting function for the V-shaped spring.

[0011] Optionally, the support member is provided with a first cavity.

[0012] By adopting the above technical solution, the first cavity is set inside the support member. When the support member is in a high-pressure environment inside a large pressure vessel, the pressure will compress and deform the support member. By setting the first cavity inside the support member, the first cavity will also be deformed under pressure while the support member is deformed. Under the same pressure, the deformation of the solid support member is less than that of the first cavity. When the first cavity is deformed under pressure, the two support surfaces of the support member that are in contact with the V-shaped spring will fit more tightly with the V-shaped spring. By setting the first cavity, it is ensured that when the support member undergoes elastic deformation under high pressure, the two support surfaces of the support member fit more tightly with the V-shaped spring, further improving the support effect of the two support surfaces on the V-shaped spring.

[0013] Optionally, the shape of the first cavity is the same as the shape of the support member.

[0014] By adopting the above technical solution, the shape of the first cavity and the shape of the support are set to be the same, so that the distance from the inner wall of the first cavity to the two support surfaces of the support is the same. When the first cavity is deformed under pressure, because the distance from the inner wall of the first cavity to the two support surfaces of the support is the same, the deformation of the first cavity under pressure is uniform. This allows the two support surfaces of the support that are in contact with the V-shaped spring to apply a uniform force to the V-shaped spring, ensuring that the force is uniform at the contact point between the V-shaped spring and the two support surfaces, and reducing the deformation of the V-shaped spring caused by uneven force to a certain extent.

[0015] Optionally, the support member includes a support portion that supports the V-shaped spring and a blocking portion that blocks the groove, the blocking portion being tightly fitted to the side wall of the main ring.

[0016] By adopting the above technical solution, the V-shaped springs in the related technologies are all in direct contact with the pressure medium in large pressure vessels. Therefore, the V-shaped springs used in high-pressure environments are not only subjected to great pressure, but may also be corroded by the pressure medium, ultimately leading to a reduction in the service life of the V-shaped springs. The support component in the above technical solution includes a support part that supports the V-shaped spring and a shielding part that shields the groove. One side of the shielding part is in contact with the pressure medium, and the side of the shielding part away from the pressure medium is tightly fitted to the side wall of the main ring. The shielding part, to a certain extent, shields the pressure medium from the groove where the V-shaped spring is placed, reducing the corrosion of the V-shaped spring by the pressure medium and extending the service life of the V-shaped spring.

[0017] Optionally, an elastic ring is provided on the outer peripheral surface of the main ring that contacts the container.

[0018] By adopting the above technical solution, the elastic ring is set on the outer circumferential surface of the main ring in contact with the container. With the setting of the elastic ring, when the main ring and the V-shaped spring are deformed under pressure, it is ensured that the V-shaped spring can undergo elastic deformation within the elastic deformation limit, while the outer circumferential surface of the main ring fits more tightly with the container, further improving the sealing effect.

[0019] Optionally, a second cavity is provided inside the main ring, and the position of the second cavity corresponds to that of the elastic ring.

[0020] By adopting the above technical solution, the second cavity is set inside the main ring, and its position corresponds to that of the elastic ring. When the main ring is in the high-pressure environment inside a large pressure vessel, it deforms under pressure. Under the same pressure, the deformation of the solid main ring is less than that of the second cavity. By setting the second cavity inside the main ring, the second cavity deforms under pressure, resulting in a tighter fit between the outer circumference of the main ring and the container. Furthermore, because the position of the second cavity corresponds to that of the elastic ring, the deformation at the second cavity location is greater, further enhancing the tightness of the fit between the elastic ring and the container, thus improving the sealing performance.

[0021] Optionally, the surface of the shielding part that contacts the V-shaped spring is provided with a baffle to prevent the V-shaped spring from piercing the shielding part.

[0022] By adopting the above technical solution, the V-shaped spring has an acute angle at its end. When the V-shaped spring and the support are in the high-pressure environment of a large pressure vessel, the acute angle of the V-shaped spring will exert a strong force on the shielding part of the support. When the pressure inside the vessel is too high, the acute angle of the V-shaped spring may pierce the shielding part. By setting a baffle, the occurrence of the shielding part being pierced by the acute angle of the V-shaped spring is reduced to a certain extent.

[0023] Optionally, the surface of the support member that contacts the main ring is provided with a locking block, and the surface of the main ring that contacts the support member is provided with a locking groove for the locking block to engage.

[0024] By adopting the above technical solution, the setting of the locking block on the support member and the setting of the locking groove on the main ring that cooperates with the locking block ensure the stability of the connection between the support member and the main ring. When the two supporting surfaces of the support member are in contact with the V-shaped spring, the locking block is embedded in the locking groove, preventing the support member from coming out of the groove of the main ring and affecting the supporting effect of the support member on the V-shaped spring.

[0025] Optionally, the width of the card block gradually increases from the direction close to the support member to the direction far away from the support member.

[0026] By adopting the above technical solution, the width of the card block gradually increases from the direction close to the support to the direction far away from the support, ensuring that the card block will not come out of the card slot when it is embedded in the card slot, and further improving the stability of the connection between the support and the main ring.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. By installing a support member on the side of the V-spring away from the main ring, the support member has two support surfaces that fit against the V-spring. When the V-spring is under pressure, the two support surfaces of the support member ensure the support of the V-spring, preventing the deformation of the V-spring from exceeding the limit of elastic deformation due to the high pressure inside the large pressure vessel. The installation of the support member extends the service life of the spring to a certain extent, enabling the V-spring to be used for a long time in large pressure vessels and ensuring the sealing performance of the sealing ring.

[0029] 2. By setting a first cavity inside the support member, the shape of the first cavity is the same as that of the support member. When the support member and the V-shaped spring are deformed by pressure, the first cavity will also deform uniformly. The first cavity makes the two support surfaces of the support member fit tightly with the V-shaped spring, further improving the support effect of the two support surfaces on the V-shaped spring. Attached Figure Description

[0030] Figure 1 This is a cross-sectional view of a sealing ring used in a large pressure vessel;

[0031] Figure 2 yes Figure 1 Enlarged view of section A;

[0032] Figure 3 yes Figure 1 Enlarged view of section B;

[0033] Figure 4 yes Figure 1 Enlarged view of section C.

[0034] Explanation of reference numerals in the attached drawings: 1. Main ring; 11. Second cavity; 12. Slot; 2. Groove; 3. V-shaped spring; 4. Support member; 41. Support surface; 42. First cavity; 43. Support part; 44. Blocking part; 441. Baffle; 45. Locking block; 5. Elastic ring. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0036] Reference Figure 1 and Figure 2 This application discloses a sealing ring for a large pressure vessel, comprising a main ring 1, grooves 2 formed on both sides of the main ring 1, a V-shaped spring 3 fitted within the grooves 2, and a support member 4 disposed on the side of the V-shaped spring 3 away from the main ring 1. Grooves 2 are formed on both sides of the main ring 1, and the shape of the grooves 2 is the same as that of the V-shaped spring 3. The two sides of the V-shaped spring 3 closest to the grooves 2 are in contact with the inner wall of the grooves 2. When the sealing ring is in a high-pressure environment, the two sides of the V-shaped spring 3 closest to the grooves 2 provide a certain degree of support to the inner wall of the grooves 2.

[0037] The support member 4 includes a support portion 43 that supports the V-shaped spring 3 and a shielding portion 44 that shields the groove 2. The V-shaped spring 3 is fitted into the groove 2 on both sides of the main ring 1. The shielding portion 44 of the support member 4 fits tightly against the side wall of the main ring 1, shielding the groove 2 located on the side wall of the main ring 1. Since the pressure medium in a large pressure vessel may enter the groove 2 and come into contact with the V-shaped spring 3, long-term corrosion of the V-shaped spring 3 by the pressure medium will reduce its service life, thus affecting the sealing performance. The shielding portion 44 of the support member 4 reduces the amount of pressure medium entering the groove 2 from the large pressure vessel, thereby reducing the contact between the V-shaped spring 3 and the pressure medium and extending the service life of the V-shaped spring.

[0038] Because the end of the V-shaped spring 3 has an acute angle, the acute angle of the V-shaped spring 3 contacts the blocking portion 44 of the support member 4. By providing a baffle 441 on the surface of the blocking portion 44 that contacts the V-shaped spring 3, the baffle 441 is used to prevent the V-shaped spring 3 from piercing the blocking portion 44. When the V-shaped spring and the support member 4 are in a high-pressure environment, the acute angle of the V-shaped spring is subjected to pressure and contacts the baffle 441. By providing the baffle 441, the occurrence of the blocking portion 44 being pierced by the acute angle of the V-shaped spring 3 is reduced to a certain extent.

[0039] The blocking portion 44 of the support member 4 is tightly fitted to the side wall of the main ring 1. A locking block 45 is fixedly installed on the blocking portion 44. The locking block 45 is integrally formed with the blocking portion 44, and the width of the locking block 45 gradually increases from the direction close to the blocking portion 44 to the direction far away from the blocking portion 44. A slot 12 for the locking block 45 to engage is provided on the surface of the main ring 1 that contacts the blocking portion 44 of the support member 4. The size and shape of the slot 12 match the size and shape of the locking block 45. The locking block 45 is made of rubber. It should be noted that the locking block 45 can also be made of other elastic materials, not limited to rubber. The material of the locking block 45 is sufficient to ensure that it engages in the slot 12 after elastic deformation.

[0040] Reference Figure 1 and Figure 3 The support part 43 has two support surfaces 41 that fit with the V-shaped spring 3. The two surfaces of the V-shaped spring away from the groove 2 fit with the two support surfaces 41 of the support part 43 respectively. The included angle formed by the two support surfaces 41 of the support part 43 is greater than the included angle formed by the V-shaped spring 3. The two support surfaces 41 provide a certain support for the V-shaped spring 3.

[0041] A first cavity 42 is formed inside the support portion 43 of the support member 4. The shape of the first cavity 42 is the same as that of the support portion 43. That is, the distance from the inner wall of the first cavity 42 to the two support surfaces 41 of the support portion 43 is the same. When the support portion 43 is deformed by pressure, the first cavity 42 will also be deformed by pressure. Since the distance from the inner wall of the first cavity 42 to the two support surfaces 41 of the support portion 43 is the same, the deformation of the first cavity 42 under pressure is uniform. The deformation of the two support surfaces 41 that are in contact with the V-shaped spring 3 is also uniform, and the force applied by the two support surfaces 41 to the V-shaped spring 3 is also uniform. The setting of the first cavity 42 ensures a tighter fit between the V-shaped spring 3 and the two support surfaces 41 of the support portion 43.

[0042] Reference Figure 1 and Figure 4 An elastic ring 5 is fitted onto the outer circumferential surface of the main ring 1 that contacts the container. The elastic ring 5 is made of rubber; however, it should be noted that the elastic ring 5 can also be made of other elastic materials, not limited to rubber. A second cavity 11 is formed inside the main ring 1, and the position of the second cavity 11 corresponds to that of the elastic ring 5. The position of the second cavity 11 is aligned with the position of the elastic ring 5 in the horizontal direction. There can be multiple elastic rings 5; in this embodiment, there are two elastic rings 5, and correspondingly, there are also two second cavities 11. When the main ring 1 is in a high-pressure environment, the main ring 1 deforms under pressure, and the second cavity 11 inside the main ring 1 also deforms under pressure. When the second cavity 11 is deformed under pressure, the elastic ring 5 fits more tightly against the container, which improves the sealing performance to a certain extent.

[0043] The implementation principle of a sealing ring for a large pressure vessel according to this application embodiment is as follows: When the sealing ring for a large pressure vessel is used in a high-pressure environment, the V-shaped spring 3 undergoes elastic deformation. Due to the setting of the support member 4, the two support surfaces 41 of the support part 43 of the support member 4, which are in contact with the V-shaped spring 3, provide support for the V-shaped spring 3, preventing the deformation of the V-shaped spring 3 from exceeding its elastic deformation limit due to excessive pressure, thus extending the service life of the V-shaped spring 3 to a certain extent. At the same time, the shielding part 44 of the support member 4 is tightly fitted with the side wall of the main ring 1, which to a certain extent prevents the pressure medium in the large pressure vessel from entering the groove 2 of the main ring 1 and contacting the V-shaped spring 3, reducing the corrosion caused by the pressure medium to the V-shaped spring 3, extending the service life of the V-shaped spring 3, and ensuring the sealing performance of the sealing ring for the large pressure vessel.

[0044] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A sealing ring for a large pressure vessel, comprising a main ring (1), grooves (2) formed on both sides of the main ring (1), and a V-shaped spring (3) fitted into the grooves (2), characterized in that: It also includes a support member (4) disposed on the side of the V-shaped spring (3) away from the main ring (1), the support member (4) having two support surfaces (41) that fit against the V-shaped spring (3).

2. The sealing ring for a large pressure vessel according to claim 1, characterized in that: The included angle formed by the two support surfaces (41) is greater than the included angle formed by the V-shaped spring (3).

3. The sealing ring for a large pressure vessel according to claim 1, characterized in that: The support member (4) has a first cavity (42).

4. A sealing ring for a large pressure vessel according to claim 3, characterized in that: The shape of the first cavity (42) is the same as that of the support (4).

5. A sealing ring for a large pressure vessel according to claim 1, characterized in that: The support member (4) includes a support part (43) that supports the V-shaped spring (3) and a shielding part (44) that shields the groove (2). The shielding part (44) is in close contact with the side wall of the main ring (1).

6. A sealing ring for a large pressure vessel according to claim 1, characterized in that: An elastic ring (5) is provided on the outer peripheral surface of the main ring (1) that contacts the container.

7. A sealing ring for a large pressure vessel according to claim 6, characterized in that: The main ring (1) is provided with a second cavity (11), and the second cavity (11) is positioned corresponding to the elastic ring (5).

8. A sealing ring for a large pressure vessel according to claim 5, characterized in that: The surface of the shield (44) that contacts the V-shaped spring (3) is provided with a baffle (441) to prevent the V-shaped spring (3) from piercing the shield (44).

9. A sealing ring for a large pressure vessel according to claim 1, characterized in that: The surface of the support member (4) that contacts the main ring (1) is provided with a locking block (45), and the surface of the main ring (1) that contacts the support member (4) is provided with a slot (12) for the locking block (45) to engage.

10. A sealing ring for a large pressure vessel according to claim 9, characterized in that: The width of the card block (45) gradually increases from the direction close to the support (4) to the direction away from the support (4).

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