Y-shaped stainless steel sealing gasket at flange

Abstract

The utility model discloses a 'Y'-shaped stainless steel sealing gasket at a flange, which comprises a sealing gasket body, the sealing gasket body is of a ring structure with a 'Y'-shaped cross section, one side of the sealing gasket body is of a closed structure, and the other side of the sealing gasket body is of an open structure. Due to the unique Y-shaped structure, the flange can extrude the sealing gasket, and therefore the sealing effect is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of exhaust system sealing, and in particular relates to a "Y"-shaped stainless steel sealing pad at a flange. Background Art

[0002] With the continuous improvement of environmental protection requirements, higher requirements are placed on the reaction efficiency of the catalytic muffler assembly. Exhaust temperature is the main factor restricting catalytic efficiency. At present, the commonly used exhaust pipe flange gaskets are mostly composed of stainless steel coated graphite structure. This type of gasket will fail to seal due to high temperature ablation during the application of National VI models. As a result, it is impossible to meet the temperature required for the reaction of the catalytic muffler assembly, resulting in the risk of substandard emissions. . Utility Model Content

[0003] In order to overcome the deficiencies of the prior art, the utility model aims to provide a stainless steel sealing gasket which has deformation capability and is resistant to high temperatures, so as to solve the above problems.

[0004] In order to solve the above problems existing in the prior art, the technical solution adopted by the utility model is:

[0005] A "Y"-shaped stainless steel sealing gasket at a flange comprises a sealing gasket body, wherein the sealing gasket body is a circular ring structure with a "Y"-shaped cross section, one side of the sealing gasket body is a closed structure, and the other side of the sealing gasket body is an open structure.

[0006] During actual connection, due to the unique "Y" structure, the flange can squeeze the gasket, thereby improving the sealing effect.

[0007] Furthermore, the sealing gasket body includes an upper sealing gasket and a lower sealing gasket, the inner side of the upper sealing gasket is connected to the inner side of the lower sealing gasket, the outer side of the upper sealing gasket and the outer side of the lower sealing gasket are separated from each other, and the sealing gasket body is welded by two stamping parts of the upper sealing gasket and the lower sealing gasket.

[0008] Furthermore, the upper sealing gasket includes an upper connecting section, an upper transition section and an upper adjusting section, and the upper connecting section and the upper adjusting section are respectively connected to two ends of the upper transition section;

[0009] The lower sealing gasket includes a lower connecting section, a lower transition section and a lower adjusting section. The lower connecting section and the lower adjusting section are respectively connected to two ends of the lower transition section. The lower connecting section is provided with a welding hole, and the lower connecting section is connected to the upper connecting section.

[0010] An adjustment angle α is formed between the upper transition section and the lower transition section, and the adjustment angle α is in the range of 20°-40°.

[0011] The connecting section is responsible for connecting the upper sealing plate and the lower sealing plate, the adjusting section is responsible for achieving the sealing effect through flange extrusion, and the transition section connects the connecting section and the adjusting section on the one hand, and controls the angle of the adjustment angle α on the other hand. If the angle α is adjusted too small, the sealing effect will be poor, and if the angle α is adjusted too large, the bending will be large and easy to break.

[0012] Furthermore, the distance between the upper adjustment section and the lower adjustment section is 2.5 mm. The upper connection section is arranged in parallel with the lower connection section, and the upper adjustment section is arranged in parallel with the lower adjustment section, and a transition bend is used to connect them, and the inner side of the sealing gasket is embossed. A welding hole is reserved at the embossed part of the lower sealing gasket for fixing the upper and lower sealing gaskets.

[0013] Furthermore, the upper gasket has the same outer contour as the lower gasket, and the inner side of the gasket is embossed at three locations, and the embossed locations are spot welded. The wall thickness of the upper gasket is 0.5 mm. The gasket body is made of stainless steel, and the surface is coated with AlCrN, with a thickness of 4 μm-6 μm.

[0014] Beneficial effects of the utility model:

[0015] 1. The utility model adopts a "Y"-shaped structure to ensure good elastic potential energy after compression. During the flange fitting process, when the gasket is subjected to force, the outer opening is squeezed first, and the gasket is deformed. When the torque of the flange outer clamp decays later, the tightly compressed gasket will rebound, the deformation will decrease, and the gasket will play a sealing role.

[0016] 2. The feasibility of manufacturing is fully considered when designing the utility model. The whole is composed of two upper and lower sealing pads welded together. The inner side of the upper / lower sealing pads is embossed in three places, and a welding position is reserved for the lower sealing pad. The sheet metal structure is used to reduce mold investment in the production process and reduce production costs.

[0017] 3. The utility model adopts a "Y"-shaped structure to ensure a good rebound amount and get rid of the dependence on graphite materials in the early design.

[0018] 4. The outer surface of the utility model is coated with AlCrN with a thickness of 4μm-6μm, which meets the high temperature working environment above 650℃.

[0019] 5. The utility model has a small inner and large outer structure to ensure that the sealing surface is in close contact. After assembly, a good surface sealing structure is formed to meet the overall sealing requirements of the exhaust system pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model.

[0021] Figure 2It is a cross-sectional schematic diagram of the utility model.

[0022] Figure 3 This is a schematic diagram of the split welding of the utility model.

[0023] Figure 4 A schematic diagram of a novel implementation is provided for this purpose.

[0024] In the figure: 1-sealing gasket body; 2-upper sealing gasket; 21-upper transition section; 23-upper connecting section; 24-upper adjusting section; 3-lower sealing gasket; 31-lower transition section; 32-welding hole; 33-lower connecting section; 34-lower adjusting section; 4-flange. DETAILED DESCRIPTION

[0025] The utility model will be further described below in conjunction with the accompanying drawings and the accompanying drawings.

[0026] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0027] The terms “first”, “second”, “third”, etc. are merely used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0030] Embodiment 1:

[0031] like Figure 1 and 4 As shown, a "Y"-shaped stainless steel sealing gasket at a flange includes a sealing gasket body 1, wherein the sealing gasket body 1 is a circular ring structure with a "Y"-shaped cross-section, one side of the sealing gasket body 1 is a closed structure, and the other side of the sealing gasket body 1 is an open structure.

[0032] During actual connection, due to the unique "Y" structure, the flange 4 can squeeze the sealing gasket, thereby improving the sealing effect.

[0033] Embodiment 2:

[0034] On the basis of Example 1, Figure 2 As shown, the sealing gasket body 1 includes an upper sealing gasket 2 and a lower sealing gasket 3, the inner side of the upper sealing gasket 2 and the inner side of the lower sealing gasket 3 (the inner side here refers to the inside of the ring) are connected, and the outer side of the upper sealing gasket 2 and the outer side of the lower sealing gasket 3 (the outer side here refers to the outside of the ring) are separated from each other.

[0035] The sealing gasket body 1 is formed by welding two stamping parts, an upper sealing gasket 2 and a lower sealing gasket 3 .

[0036] The upper sealing gasket 2 includes an upper connecting section 23, an upper transition section 21 and an upper adjusting section 24, wherein the upper connecting section 23 and the upper adjusting section 24 are respectively connected to two ends of the upper transition section 21;

[0037] The lower sealing gasket 3 includes a lower connecting section 33, a lower transition section 31 and a lower adjusting section 34. The lower connecting section 33 and the lower adjusting section 34 are respectively connected to the two ends of the lower transition section 31. The lower connecting section 33 is provided with a welding hole 32. The lower connecting section 33 is connected to the upper connecting section 23.

[0038] An adjustment angle α is formed between the upper transition section 21 and the lower transition section 31 , and the adjustment angle α is in the range of 20° to 40°.

[0039] The connecting section is responsible for connecting the upper sealing plate and the lower sealing plate, the adjusting section is responsible for achieving the sealing effect through extrusion of the flange 4, and the transition section connects the connecting section and the adjusting section on the one hand, and controls the angle of the adjustment angle α on the other hand. If the angle α is adjusted too small, the sealing effect will be poor, and if the angle α is adjusted too large, the bending will be large and easy to break.

[0040] Embodiment 3:

[0041] On the basis of Example 2, Figure 3 As shown, the maximum distance between the upper adjustment section 24 and the lower adjustment section 34 is 2.5 mm.

[0042] The upper connecting section 23 is arranged in parallel with the lower connecting section 33, and the upper adjusting section 24 is arranged in parallel with the lower adjusting section 34, and they are connected by transition bending, and the inner side of the sealing gasket is embossed. The lower sealing gasket 3 has a welding hole 32 reserved at the embossed part for fixing the upper and lower sealing gaskets 3.

[0043] The upper sealing gasket 2 and the lower sealing gasket 3 have the same outer contour, and the inner side of the sealing gasket is embossed at three locations, and the embossed locations are spot-welded.

[0044] The overall wall thickness of the upper sealing gasket 2 is 0.5 mm.

[0045] The sealing gasket body 1 is made of stainless steel, and the surface is coated with AlCrN with a thickness of 4 μm-6 μm.

[0046] Specific working principle: This new type of gasket is installed between two flanges 4. The "Y"-shaped opening end is first fitted to the flange 4 plane. Under the action of external force during assembly, it is first compressed and then rebounded to form an annular surface sealing structure. The maximum compression rate of the gasket can reach 60%, and it can still form a good sealing effect after rebounding in the normal sealing state. By utilizing the characteristics of metal rebound, the dependence on graphite materials in the early design is eliminated. The sealing failure caused by gasket ablation is solved, the sealing of the exhaust pipe is improved, and the emission target is effectively promoted.

[0047] The present utility model is not limited to the above-mentioned optional implementation modes. Anyone can derive other various forms of products under the inspiration of the present utility model. However, no matter what changes are made in the shape or structure, all technical solutions that fall within the scope defined by the claims of the present utility model fall within the protection scope of the present utility model.

Claims

1. A "Y"-shaped stainless steel sealing gasket at a flange, characterized in that: It comprises a sealing gasket body (1), wherein the sealing gasket body (1) is a circular ring structure with a "Y"-shaped cross section, one side of the sealing gasket body (1) is a closed structure, and the other side of the sealing gasket body (1) is an open structure.

2. The "Y"-shaped stainless steel sealing gasket at the flange according to claim 1, characterized in that: The sealing gasket body (1) comprises an upper sealing gasket (2) and a lower sealing gasket (3), wherein the inner side of the upper sealing gasket (2) is connected to the inner side of the lower sealing gasket (3), and the outer side of the upper sealing gasket (2) and the outer side of the lower sealing gasket (3) are separated from each other.

3. The "Y"-shaped stainless steel sealing gasket at the flange according to claim 1, characterized in that: The sealing gasket body (1) is formed by welding two stamping parts, an upper sealing gasket (2) and a lower sealing gasket (3).

4. The "Y"-shaped stainless steel sealing gasket at the flange according to claim 2, characterized in that: The upper sealing gasket (2) comprises an upper connecting section (23), an upper transition section (21) and an upper adjusting section (24), wherein the upper connecting section (23) and the upper adjusting section (24) are respectively connected to two ends of the upper transition section (21); The lower sealing gasket (3) comprises a lower connecting section (33), a lower transition section (31) and a lower adjusting section (34); the lower connecting section (33) and the lower adjusting section (34) are respectively connected to two ends of the lower transition section (31); the lower connecting section (33) is provided with a welding hole (32); and the lower connecting section (33) is connected to the upper connecting section (23).

5. The "Y"-shaped stainless steel sealing gasket at the flange according to claim 4 is characterized in that: An adjustment angle α is formed between the upper transition section (21) and the lower transition section (31), and the adjustment angle α is in the range of 20° to 40°.

6. The "Y"-shaped stainless steel sealing gasket at the flange according to claim 4, characterized in that: The distance between the upper adjustment section (24) and the lower adjustment section (34) is 2.5 mm.

7. The "Y"-shaped stainless steel sealing gasket at the flange according to claim 2, characterized in that: The wall thickness of the upper sealing gasket (2) is 0.5 mm.

8. The "Y"-shaped stainless steel sealing gasket at the flange according to claim 1, characterized in that: The sealing gasket body (1) is made of stainless steel.

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