Sealing nut assembly

Abstract

The utility model discloses a sealing nut assembly which comprises a nut body, an inner threaded hole is formed in the middle of the nut body, a limiting boss is arranged at the bottom of the nut body, a bottom sealing gasket is arranged on the surface of the limiting boss in a sleeved mode, an inner conical surface is arranged on the top of the nut body, and a top sealing gasket is arranged on the surface of the inner conical surface. The top sealing gasket is matched with the inner conical surface in shape, and a limiting protruding plate is fixed to the top of the nut body. Through the inner conical surface adaptive structure of the bottom sealing gasket and the top sealing gasket, double sealing from the top and the bottom is achieved, the sealing performance is remarkably improved, and the problems that a traditional nut is poor in sealing performance, and liquid or gas leakage is prone to being caused are solved.

Description

Technical Field

[0001] This utility model relates to the field of nut technology, specifically a sealing nut assembly. Background Technology

[0002] A nut is a fastener that is screwed onto a bolt or threaded rod to secure a fastener. It is an essential component in all manufacturing machinery. Based on the material, nuts are classified into several types, including carbon steel, stainless steel, and non-ferrous metals.

[0003] However, existing nuts generally do not have sealing properties. For some components that require sealed connections, gas or liquid can easily leak from the connection between the nut and the bolt or thread, failing to meet the connection requirements of components that require sealed connections, resulting in poor performance. Utility Model Content

[0004] The purpose of this invention is to provide a sealing nut assembly that achieves double sealing from the top and bottom through the matching structure of the inner conical surfaces of the bottom and top sealing gaskets, significantly improving sealing performance and solving the problem of poor sealing performance of traditional nuts, which easily leads to liquid or gas leakage.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a sealing nut assembly, comprising a nut body, an internal threaded hole in the middle of the nut body, a limiting protrusion at the bottom of the nut body, a bottom sealing gasket fitted on the surface of the limiting protrusion, an inner conical surface at the top of the nut body, a top sealing gasket on the surface of the inner conical surface, the shape of the top sealing gasket being adapted to the inner conical surface, and a limiting protrusion fixed at the top of the nut body.

[0006] As a preferred example of a sealing nut assembly of this utility model, the surface roughness of the inner conical surface is Ra0.8, and the surface of the top sealing gasket is provided with a microporous structure, which is used to enhance the sealing performance.

[0007] As a preferred embodiment of the sealing nut assembly of this utility model, the nut body, the limiting platform protrusion, and the limiting convex plate are all made of stainless steel.

[0008] As a preferred embodiment of the sealing nut assembly of this utility model, the nut body, the limiting platform protrusion, and the limiting convex plate are integrally molded.

[0009] As a preferred embodiment of the sealing nut assembly of this utility model, the nut body, the limiting protrusion, the limiting platform protrusion and the surface of the internal threaded hole are all coated with a hard wear-resistant coating, which is a titanium nitride coating.

[0010] As a preferred embodiment of the sealing nut assembly of this utility model, the outer surface of the bottom sealing gasket is provided with a lip-shaped edge.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] This utility model achieves high-efficiency sealing and stable performance through optimized structural design, material selection, and process treatment. The lip edge of the bottom sealing gasket and the inner conical surface of the top sealing gasket are matched to form a double sealing mechanism, which effectively prevents liquid or gas leakage. Even when the sealing surface is uneven or the operating conditions change, it can still maintain a good sealing effect. This makes the nut assembly outstanding in terms of sealing performance, structural stability, adaptability, service life, and maintenance convenience. It is particularly suitable for complex working conditions with extremely high sealing requirements, such as hydraulic, pneumatic, and chemical industries. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0014] Figure 2 This is a three-dimensional structural schematic diagram of the present invention from another perspective;

[0015] Figure 3 This is a schematic diagram of the exploded structure of this utility model;

[0016] Figure 4 This is a cross-sectional structural diagram of the present invention.

[0017] In the diagram: 1. Nut body; 2. Internal threaded hole; 3. Limiting protrusion; 4. Bottom sealing gasket; 5. Inner conical surface; 6. Top sealing gasket; 7. Limiting protrusion. Detailed Implementation

[0018] Please see Figure 1-4 A sealing nut assembly includes a nut body 1, an internal threaded hole 2 in the middle of the nut body 1, a limiting protrusion 3 at the bottom of the nut body 1, a bottom sealing gasket 4 on the surface of the limiting protrusion 3, an inner conical surface 5 at the top of the nut body 1, a top sealing gasket 6 on the surface of the inner conical surface 5, the shape of the top sealing gasket 6 being adapted to the inner conical surface 5, and a limiting protrusion 7 fixed at the top of the nut body 1.

[0019] The top sealing gasket 6 is freely placed above the inner conical surface 5, flush with the top plane of the nut body 1. When tightened, the bolt squeezes the top sealing gasket 6, and the inner conical surface 5 guides the material of the top sealing gasket 6 to extend outward. At the same time, the top sealing gasket 6 undergoes axial deformation, tightly fitting the inner conical surface 5 and filling the thread gap, thereby effectively preventing liquid or gas leakage. The top annular limiting protrusion 7 restricts the excessive expansion of the top sealing gasket 6 and can guide the position of the top sealing gasket 6, ensuring that the top sealing gasket 6 is more accurately placed above the nut body 1. The setting of the limiting platform protrusion 3 provides a stable installation platform for the bottom sealing gasket 4, so that the bottom sealing gasket 4 can fit tightly between the nut body 1 and the connected parts, effectively preventing liquid or gas leakage from the bottom of the nut body 1, improving the overall sealing performance of the nut body 1 assembly, especially suitable for occasions requiring strict sealing, such as hydraulic systems, pneumatic systems or chemical equipment.

[0020] Furthermore, the surface roughness of the inner conical surface 5 is Ra0.8, and the surface of the top sealing gasket 6 is provided with a microporous structure, which is used to enhance the sealing performance;

[0021] The surface roughness of the inner conical surface 5 is Ra0.8. This roughness design ensures good contact and fit between the top sealing gasket 6 and the inner conical surface 5, thereby improving the sealing performance. At the same time, the microporous structure on the surface of the top sealing gasket 6 can store a small amount of lubricant or sealing medium, further enhancing the sealing effect and reducing friction, thus extending the service life of the top sealing gasket 6.

[0022] Furthermore, the nut body 1, the limiting platform protrusion 3, and the limiting convex plate 7 are all made of stainless steel;

[0023] The nut body 1, the limiting platform protrusion 3, and the limiting convex plate 7 are made of stainless steel, which has good corrosion resistance and high strength. This effectively prevents the nut body 1 assembly from rusting in humid or corrosive environments, thereby extending the service life of the nut body 1 assembly and ensuring its reliability and stability in various harsh environments.

[0024] Furthermore, the nut body 1, the limiting platform protrusion 3, and the limiting convex plate 7 are manufactured using an integrated molding process;

[0025] This design can improve the overall strength and structural stability of the nut body component 1, avoid structural weaknesses caused by welding or splicing, and the integrated molding process can also reduce assembly errors in the manufacturing process, improve production efficiency and product quality consistency.

[0026] Furthermore, the surfaces of the nut body 1, the limiting protrusion 7, the limiting platform protrusion 3, and the internal thread hole 2 are all coated with a hard wear-resistant coating, which is a titanium nitride coating.

[0027] The hard wear-resistant coating has high hardness and good wear resistance, which can effectively reduce the wear caused by friction during the use of the nut body 1 and extend the service life of the nut body 1. At the same time, the titanium nitride coating also has certain anti-corrosion properties, further improving the adaptability of the nut body 1 assembly in harsh environments.

[0028] Furthermore, the outer surface of the bottom sealing gasket 4 is provided with a lip-shaped edge;

[0029] The lip edge fits tightly to the contact surface through its elastic deformation capability and can be further compressed under pressure, thereby adapting to slight unevenness or deviation of the sealing surface. Even in the presence of minor deformation, it can still maintain a good sealing effect and effectively prevent liquid or gas leakage.

[0030] Working principle: The bottom sealing gasket 4 is fitted onto the limiting protrusion 3, ensuring that its bottom is in close contact with the surface of the connected component. The top sealing gasket 6 is placed above the inner conical surface 5, ensuring its compatibility with the inner conical surface 5. The nut body 1 is tightened onto the bolt. During the tightening process, the top sealing gasket 6 undergoes axial deformation under the compression of the bolt. The inner conical surface 5 guides the sealing gasket material to extend outward, closely fitting the inner conical surface 5 and filling the thread gap. The limiting protrusion 7 restricts the excessive expansion of the top sealing gasket 6, ensuring its stability during the sealing process. The lip edge of the bottom sealing gasket 4 fits tightly with the surface of the connected component through elastic deformation, adapting to minor unevenness of the sealing surface and effectively preventing liquid or gas leakage.

[0031] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sealing nut assembly comprising a nut body (1), characterized in that: The nut body (1) is provided with an inner threaded hole (2) in the middle, a limiting platform (3) is arranged at the bottom of the nut body (1), a bottom sealing gasket (4) is arranged on the surface of the limiting platform (3), an inner tapered surface (5) is arranged at the top of the nut body (1), a top sealing gasket (6) is arranged on the surface of the inner tapered surface (5), the top sealing gasket (6) is matched with the inner tapered surface (5) in shape, and a limiting convex plate (7) is fixed at the top of the nut body (1).

2. A sealing nut assembly according to claim 1, wherein: The surface roughness of the inner tapered surface (5) is Ra0.8, the surface of the top sealing gasket (6) is provided with a microporous structure, and the microporous structure is used for enhancing the sealing performance.

3. A sealing nut assembly according to claim 1, wherein: The nut body (1), the limiting platform (3) and the limiting convex plate (7) are all made of stainless steel.

4. A sealing nut assembly according to claim 1, wherein: The nut body (1), the limiting platform (3) and the limiting convex plate (7) are integrally formed.

5. A sealing nut assembly according to claim 1, wherein: The surfaces of the nut body (1), the limiting convex plate (7), the limiting platform (3) and the inner threaded hole (2) are coated with a hard wear-resistant coating, and the hard wear-resistant coating is a titanium nitride coating.

6. A sealing nut assembly according to claim 1, wherein: The outer surface of the bottom sealing gasket (4) is provided with a lip-shaped edge.

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