Elastic metal sealing element and valve with same

Abstract

The utility model discloses an elastic metal sealing piece and a valve with the elastic metal sealing piece, and relates to the technical field of valves, the elastic metal sealing piece comprises a sealing piece body, the sealing piece body is of an annular structure, and the sealing piece body is sequentially divided into an upper ring part, a middle ring part and a lower ring part in the axial direction, the middle ring part is an annular convex rib sunken towards the central axis direction of the sealing element body, the structural strength of the sealing element can be improved through the structural arrangement of the annular convex rib of the middle ring part, and the sealing element is not prone to deformation or damage when bearing large pressure, so that durability and reliability are improved, the sealing effect is improved, and the service life of the sealing element is prolonged. The elastic metal sealing element is used for replacing a soft sealing element, the advantages of high strength, high toughness and excellent temperature resistance of metal materials are combined, good elasticity and sealing performance are kept, and the reliability of the valve in long-term operation is guaranteed. Comprising a valve body, a valve plate and an elastic metal sealing piece connected between the valve body and the valve plate in a sealed mode.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and more specifically to an elastic metal seal and a valve having the same. Background Technology

[0002] A triple offset butterfly valve is a device that controls fluid flow by rotating a valve plate. The valve is opened or closed by rotating the valve plate. Compared to traditional butterfly valves, the triple offset butterfly valve achieves stronger sealing performance and better pressure resistance through its unique geometry. To meet surging market demand, the design and technology of triple offset butterfly valves are continuously optimized and upgraded, with improvements to the sealing components being particularly important. High-quality sealing components not only affect the valve's sealing performance but also directly relate to its service life and maintenance costs.

[0003] Currently, traditional triple offset butterfly valves mostly use soft seals. In high-temperature and high-pressure working environments, these seals may undergo thermal deformation, affecting the valve's sealing performance and service life. Soft seals, when subjected to thermal expansion and compression, are prone to losing elasticity and flexibility, leading to fluid leakage. This not only increases the risk of equipment wear but may also pose safety hazards and economic losses to production.

[0004] Therefore, how to provide a sealing element and valve that improves sealing performance and ensures sealing effect is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the present invention provides an elastic metal seal, aiming to solve the above-mentioned technical problems.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An elastic metal seal includes a seal body, the seal body having an annular structure and being divided into an upper ring portion, a middle ring portion and a lower ring portion in sequence along the axial direction, wherein the middle ring portion is an annular rib recessed toward the central axis of the seal body.

[0008] Through the above technical solution, this utility model provides an elastic metal seal that achieves an axially layered seal through a ring structure design. The annular rib structure in the middle ring improves the structural strength of the seal, making it less prone to deformation or damage under high pressure, thereby improving the durability and reliability of the seal and enhancing the sealing effect. By using an elastic metal seal instead of a soft seal, it combines the advantages of high strength, high toughness, and excellent temperature resistance of metal materials. In high-temperature and high-pressure working environments, it is not easy to lose its elasticity and flexibility, maintaining good elasticity and sealing performance, and ensuring the reliability of the valve during long-term operation.

[0009] Preferably, in the aforementioned resilient metal seal, there are rounded chamfers between the upper ring portion and the middle ring portion, and between the lower ring portion and the middle ring portion. The rounded chamfers help reduce stress concentration and improve the seal's durability.

[0010] Preferably, in the above-mentioned elastic metal seal, the outer wall of the upper ring is fitted with an upper support portion, and the outer wall of the lower ring is fitted with a lower support portion. The bottom edge of the upper support portion and the top edge of the lower support portion are connected by a spring. The seal body is tightly fitted to the valve body through the upper and lower support portions, resulting in balanced force distribution and a large force-bearing area, which greatly increases the service life of the seal body. The spring provides additional elasticity, reduces the stress on the annular ribs, maintains the shape of the annular ribs, and allows for easy removal and replacement of easily worn annular ribs.

[0011] Preferably, in the above-mentioned elastic metal seal, the central ring portion includes a first rib and a second rib, and a sealing groove is formed between the first rib and the second rib. A first sealing ring is installed in the sealing groove. This provides a dual sealing effect: when the pressure is low, the first sealing ring achieves a seal; when the pressure is high, the first rib, the second rib, and the first sealing ring work together to achieve a seal. When the first rib and the second rib are moved under pressure, the sealing groove undergoes slight deformation and moves slightly towards the side where the valve plate is located, ensuring that the first sealing ring is always in contact with the valve plate for sealing.

[0012] Preferably, in the above-mentioned elastic metal seal, an oil port is provided on the central ring portion. When the seal body deforms, the liquid in the annular opening can be discharged.

[0013] This utility model also provides a valve, including a valve body, a valve plate, and an elastic metal seal connected between the valve body and the valve plate; the valve body is detachably connected to a secondary valve body by bolts, and a T-shaped mounting cavity and an annular opening are formed between the valve body and the secondary valve body, the upper ring portion and the lower ring portion are located in the mounting cavity, the middle ring portion is located in the annular opening, and is fitted and sealed with the valve plate.

[0014] Preferably, in the valve described above, a second sealing ring is installed between the top edge of the upper ring portion and the bottom edge of the lower ring portion and the mounting cavity. The second sealing ring further improves the sealing effect, and at the same time, provides elasticity when the sealing element body deforms smoothly, and its sealing effect becomes more stable as the pressure increases.

[0015] Preferably, in the valve described above, a pressure sensor is installed on the side of the valve body away from the annular opening, corresponding to the mounting cavity. This allows for real-time detection of the pressure on the sealing body, facilitating monitoring.

[0016] Preferably, in the valve body described above, a support washer is installed between the outer walls of the upper ring portion and the lower ring portion and the valve body. The support washer can provide a certain supporting force.

[0017] Preferably, in the valve described above, the support washer is made of rubber. The support washer can be made of a soft material, but is not limited to rubber. Since the sealing element body is a rigid, elastic metal material, it is prone to not fitting tightly with the valve body during long-term use, affecting the sealing stability of the sealing element body. Adding a support washer can support the sealing element body on the one hand, and on the other hand, ensure that the sealing element body and the valve body always fit tightly, guaranteeing the sealing effect.

[0018] As can be seen from the above technical solution, compared with the prior art, the present invention discloses an elastic metal seal and a valve having the same, which has the following beneficial effects:

[0019] 1. The sealing body of this utility model adopts a ring structure, which is divided into an upper ring, a middle ring and a lower ring. This design makes the sealing part have better stability and adaptability in the axial direction. The middle ring is designed with annular ribs, which increases the sealing contact area and improves the sealing effect.

[0020] 2. This utility model uses an elastic metal seal instead of a soft seal, combining the advantages of high strength, high toughness and excellent temperature resistance of metal materials. In high temperature and high pressure working environments, it is not easy to lose its elasticity and flexibility, maintains good elasticity and sealing performance, and ensures the reliability of the valve in long-term operation.

[0021] 3. The sealing connection between the sealing element and the valve body and valve plate of this utility model ensures the sealing performance of the valve during opening and closing, reducing the risk of leakage. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0023] Figure 1 The attached figure is a front view of the elastic metal seal provided by this utility model;

[0024] Figure 2 The attached figure is an isometric view of the elastic metal seal provided by this utility model;

[0025] Figure 3The attached figure is a front view of the elastic metal seal provided by this utility model, with an upper support and a lower support sleeved on the outside.

[0026] Figure 4 The attached figure is an isometric view of the elastic metal seal provided by this utility model, with an upper support and a lower support sleeved on the outside.

[0027] Figure 5 The attached figure is a schematic diagram of the structure of the elastic metal seal provided by this utility model, showing that the ring portion has a first rib and a second rib.

[0028] Figure 6 The attached figure is a schematic diagram of the structure of the elastic metal seal and valve sealing connection provided by this utility model;

[0029] Figure 7 The attached figure is a schematic diagram of the structure provided by this utility model, which has an installation cavity and an annular opening between the valve body and the sub-valve body.

[0030] Figure 8 The attached image is... Figure 6 Enlarged view of part A in the attached diagram;

[0031] Figure 9 The attached figure is a schematic diagram of the structure of the elastic metal seal provided by this utility model, which is provided with an upper support and a lower support on the outer side.

[0032] Figure 10 The attached figure is a structural schematic diagram of the sealing connection of the valve body with a first rib and a second rib in the middle ring section provided by this utility model.

[0033] in:

[0034] 1-Upper ring;

[0035] 11-Upper support section;

[0036] 2-Central Ring Road;

[0037] 21-First raised rib; 22-Second raised rib; 23-Sealing groove; 24-First sealing ring; 25-Oil port;

[0038] 3-Lower ring;

[0039] 31-Lower support section;

[0040] 4- Rounded chamfer;

[0041] 5-Spring;

[0042] 6-Valve body;

[0043] 61- Bolt; 62- Secondary valve body; 63- Mounting cavity; 64- Annular opening; 65- Second sealing ring; 66- Pressure sensor; 661- Mounting part;

[0044] 7-Valve plate;

[0045] 8-Support washer. Detailed Implementation

[0046] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0047] Example 1:

[0048] See appendix Figure 1 , 2 According to embodiment 6, this utility model discloses a triple eccentric butterfly valve, including a valve body 6, a valve plate 7, and an elastic metal seal connected between the valve body 6 and the valve plate 7. The valve body 6 is detachably connected to a secondary valve body 62 by bolts 61. A T-shaped mounting cavity 63 and an annular opening 64 are formed between the valve body 6 and the secondary valve body 62. The elastic metal seal includes a seal body, which is an annular structure and is divided into an upper ring portion 1, a middle ring portion 2, and a lower ring portion 3 along the axial direction. The middle ring portion 2 is an annular rib recessed towards the central axis of the seal body. The upper and lower ring portions are installed in the mounting cavity 63 and fit against the side wall of the valve body 1. The middle ring portion is located in the annular opening 64 and is fitted and sealed against the valve plate.

[0049] During operation, the valve plate 7 rotates to open and close the triple eccentric butterfly valve. The valve plate 7 contacts the middle ring of the sealing element body to form a seal, thus closing the valve. The sealing element body is tightly fitted to the valve body 6 through the upper ring 1 and the lower ring 3. A cylindrical mounting cavity 63 is formed between the valve body 6 and the sub-valve body 62, which increases the contact area between the sealing element body and the valve body 6, transferring the large amount of pressure from the valve plate 7 to the valve body 6 more evenly and reducing the deformation of the sealing element body. When the pressure on the middle ring 2 is too high, the sealing element body slides inside the mounting cavity 63 through the upper ring 1 and the lower ring 3, causing the sealing element body to deform and preventing damage to the sealing element body due to excessive pressure. To ensure smooth deformation of the sealing element body, there is an installation gap between the top edge of the upper ring and the bottom edge of the lower ring and the mounting cavity 63. A second sealing ring 65 is installed in this installation gap. Figure 8 As shown, a second sealing ring 65 is installed in the installation gap. On the one hand, it forms a seal to prevent liquid leakage, and on the other hand, it provides elasticity when the sealing body deforms smoothly. Moreover, its sealing effect becomes more stable as the pressure increases.

[0050] By replacing soft seals with elastic metal seals, the advantages of high strength, high toughness and excellent temperature resistance of metal materials are combined. In high temperature and high pressure working environments, it is not easy to lose elasticity and flexibility, maintain good elasticity and sealing performance, and ensure the reliability of valves in long-term operation.

[0051] To further optimize the above technical solution, the valve body 6 is provided on the side away from the annular opening 64, and a mounting part 661 is provided at the corresponding mounting cavity 63, and the pressure sensor 66 is installed in the mounting part 661.

[0052] To further optimize the above technical solution, a support washer 8 is installed between the upper ring 1, the lower ring 3 and the valve body 1. The support washer 8 is a soft material that can provide a certain support force. Since the sealing body is an elastic metal hard material, it is easy to not fit tightly with the valve body 6 during long-term use, which affects the sealing stability of the sealing body. Adding the support washer 8 can support the sealing body on the one hand, and make the sealing body and the valve body 6 always fit tightly on the other hand.

[0053] To further optimize the above technical solutions, such as Figure 2 As shown, the sealing body is also provided with an oil port 25, which can discharge the liquid in the annular opening 64 when the sealing body deforms.

[0054] Example 2: See Appendix Figure 1-4 9. An upper support part 11 is detachably connected to the outer side wall of the upper ring part 1, and a lower support part 31 is detachably connected to the outer side wall of the lower ring part 3. The bottom edge of the upper support part 11 and the top edge of the lower support part 31 are connected by a spring 5.

[0055] To further optimize the above technical solution, the upper support part 11 is located between the upper ring part and the valve body 6, and is tightly fitted to the valve body; the lower support part 31 is located between the lower ring part and the valve body 6, and is tightly fitted to the valve body 6.

[0056] The sealing element body is tightly attached to the valve body 6 by the upper support part 11 and the lower support part 31, which provides balanced force and a large force-bearing area, greatly increasing the service life of the sealing element body. The upper support part 11 and the lower support part 31, which are connected by springs and are detachable, can provide additional elastic force from the upper support part 11, reduce the pressure on the middle ring part 2 and maintain the shape of the annular rib, reduce the manufacturing requirements of the elastic element, reduce impact and increase service life. On the other hand, the easily worn sealing element body can be disassembled and replaced at any time.

[0057] Example 3:

[0058] like Figure 5 , 10As shown, the annular rib of the middle ring 2 has a first rib 21 and a second rib 22. A sealing groove 23 is formed between the first rib 21 and the second rib 22. A first sealing ring 24 is installed at the sealing groove 23. The valve body 6 and the valve plate 7 are sealed by the first sealing ring 24.

[0059] To further optimize the above technical solution, a support washer 8 is installed between the upper ring 1 and the lower ring 3 and the valve body 6.

[0060] During operation: when the pressure is low, the seal is achieved through the first sealing ring 24; when the pressure is high, the seal is achieved simultaneously through the sealing ring 24, the first rib 21, and the second rib 22.

[0061] This structure provides a double seal, enhancing sealing stability and preventing impact. Under high pressure, the first rib 21 or the second rib 22 can protect the first sealing ring 24, preventing it from being damaged by excessive pressure. It also allows for easy replacement of the easily worn first sealing ring 24.

[0062] When the first rib 21 and the second rib 22 are pressed and moved, the sealing groove 23 undergoes slight deformation and moves slightly to the side where the valve plate 7 is located, so that the first sealing ring 24 and the valve plate 7 are always in contact and sealed.

[0063] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0064] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A resilient metal seal, characterized in that, The sealing body is a ring structure, and it is divided into an upper ring (1), a middle ring (2) and a lower ring (3) in sequence along the axial direction. The middle ring (2) is a ring-shaped rib that is recessed towards the central axis of the sealing body.

2. The elastic metal seal according to claim 1, characterized in that, The upper ring portion (1) and the middle ring portion (2) have rounded chamfers (4), and the lower ring portion (3) and the middle ring portion (2) have rounded chamfers (4).

3. The elastic metal seal according to claim 1, characterized in that, The outer side wall of the upper ring (1) is fitted with an upper support (11), and the outer side wall of the lower ring (3) is fitted with a lower support (31). The bottom edge of the upper support (11) and the top edge of the lower support (31) are connected by a spring (5).

4. The elastic metal seal according to claim 1, characterized in that, The middle ring (2) includes a first rib (21) and a second rib (22), and a sealing groove (23) is formed between the first rib (21) and the second rib (22), and a first sealing ring (24) is installed at the sealing groove (23).

5. A resilient metal seal according to any one of claims 1-4, characterized in that, An oil port (25) is provided on the middle ring part (2).

6. A valve, characterized in that, The device includes a valve body (6), a valve plate (7), and an elastic metal seal as described in any one of claims 1-5, which is sealed between the valve body (6) and the valve plate (7); the valve body (6) is detachably connected to a secondary valve body (62) by bolts (61), and a T-shaped mounting cavity (63) and an annular opening (64) are formed between the valve body (6) and the secondary valve body (62), the upper ring portion (1) and the lower ring portion (3) are located in the mounting cavity (63), and the middle ring portion (2) is located in the annular opening (64) and is fitted and sealed with the valve plate (7).

7. A valve according to claim 6, characterized in that, A second sealing ring (65) is installed between the top edge of the upper ring (1) and the bottom edge of the lower ring (3) and the mounting cavity (63).

8. A valve according to claim 6, characterized in that, A pressure sensor (66) is installed on the side of the valve body (6) away from the annular opening (64).

9. A valve according to claim 6, characterized in that, Support washers (8) are installed between the outer walls of the upper ring (1) and the lower ring (3) and the valve body (6).

10. A valve according to claim 9, characterized in that, The support washer (8) is made of rubber.

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