CN214118937U - Metal winding type gasket - Google Patents

Abstract

The utility model relates to a metal wound gasket, including outer loop, gasket body and the inner ring that connects gradually from the extroversion to the inside. The outer ring and the inner ring are both formed by rolling metal strips, and the outer ring and the inner ring are respectively provided with a plurality of welding points; the gasket body comprises a metal belt and a non-metal flexible belt wound on the metal belt; the thickness of the inner and outer ring metal bands is less than that of the gasket body. Because the outer ring and the inner ring are both formed by rolling metal strips, the inner ring, the outer ring and the gasket body can share the same processing equipment, the traditional manufacturing process formed by pressing steel plates is replaced, the operation is simple and convenient, and the sealing performance is excellent; secondly, the tight fit of the inner ring and the outer ring with the gasket body is improved, the maximum compression degree of the gasket is controlled, the stress size and the stress direction of the inner ring and the outer ring of the gasket are consistent with theoretical analysis in the actual application process, the sealing equipment can run for a long time, and the possibility of leakage accidents is reduced.

Description

Metal winding type gasket

Technical Field

The utility model belongs to the technical field of the metal sealing gasket, concretely relates to metal wound gasket.

Background

The metal gasket has excellent performance, can be used in application occasions with complex environment, such as periodic temperature and pressure change, impact and vibration occasions, and has good sealing effect. In the manufacturing process, the metal winding gasket is mostly formed by winding a V-shaped or W-shaped steel belt and a nonmetal soft material according to an industry standard, and the metal belt is fixed at the beginning and the tail end in a spot welding mode to ensure that the metal winding gasket has certain locking force.

For the gasket with small rigidity, after the gasket is subjected to radial tension, relative dislocation can occur between the metal belt and the nonmetal filling belt, so that a weak interface is formed, and at the moment, if the gasket is subjected to circumferential torque, stress concentration is easy to occur to cause damage, and measures must be taken to improve the rigidity of the gasket.

In order to solve the above problem, an inner ring and an outer ring are further provided in the gasket. The inner ring is used for enhancing the compression degree of the gasket, preventing the winding part from generating convex bending of the steel strip towards the inner side, and simultaneously maintaining torque balance and preventing over-compression; the outer ring mainly plays a positioning role, the outer diameter of the outer ring is abutted to the bolt, and the metal wound gasket can be accurately centered to achieve a good sealing effect.

In the manufacturing process of the gasket, the inner ring and the outer ring are machined mainly by a lathe, and a process route of plate shearing → drilling → turning is adopted, namely, firstly, the plate is pretreated, then, the next procedure of drilling is carried out, then, the lathe is turned for turning, and after the steel ring is turned off, the inner groove or chamfer angle of the steel ring is machined by using a die. Low material utilization rate, various processing devices and high economic cost.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a go on for solving above-mentioned technical problem, provide a metal wound gasket with novel structure to simplify the processing technology of gasket. In order to achieve the above object, the technical solution adopted by the present invention is summarized as follows:

the utility model provides a metal wound gasket, including outer loop, gasket body and the inner ring that connects gradually from the extroversion to the inside. The outer ring and the inner ring are both formed by rolling metal strips, and the outer ring and the inner ring are respectively provided with a plurality of welding points; the gasket body comprises a metal belt and a non-metal flexible belt wound on the metal belt; the thickness of the inner and outer ring metal bands is less than that of the gasket body.

Preferably, the utility model provides an among the metal wound gasket, inner ring and outer loop all adopt V type or W shaped steel coil of strip system to form, and the welding spot is along circumference evenly distributed, and the compressive strength of the inner ring of guaranteeing to twine to make and outer loop is even.

Preferably, in the utility model provides an among the metal winding formula gasket, the thickness ratio of inner ring and outer loop and gasket body is confirmed according to operating condition.

Preferably, in the metal winding type gasket provided by the present invention, the radial cross-sectional shape of the gasket body is in a form of ">", and the gasket body is observed from the outside to be outwardly protruded along the horizontal plane, and the gasket body is observed from the inside to be outwardly depressed along the horizontal plane. The structure can effectively improve the fitting degree of the inner side of the outer ring and the outer side of the inner ring to the gasket body, and improve the actual sealing effect of the metal wound gasket.

Preferably, in the metal winding type gasket provided by the utility model, the inner side of the outer ring is provided with a V-shaped matching groove, and the outer side wall of the gasket body is provided with a bulge matched with the V-shaped matching groove; the inner side wall of the gasket body is provided with a sunken part, the middle part of the inner ring is provided with an insertion part which protrudes outwards along the radial direction, and the insertion part is embedded into the sunken part to realize the connection among the outer ring, the gasket body and the inner ring.

Preferably, in the metal wound gasket provided by the present invention, the depth of the V-shaped fitting groove is half of the thickness of the outer ring.

Preferably, in the utility model provides an among the metal wound gasket, in the gasket body, the strap surface is provided with the ripple, and non-metallic flexible area is made by flexible graphite material.

The utility model has the advantages of

According to the utility model provides a metal wound gasket, outer loop and inner ring all adopt the strap system of rolling up to form for the inner and outer loop can directly be rolled up by the coiler and form, replaces the tradition preparation technology that forms by the steel sheet suppression, and the same processing equipment of inner and outer loop and winding gasket sharing directly takes the place of by the coiler of production winding gasket to process, and is easy and simple to handle, and sealing performance is excellent, increases material utilization, reduces the business operation cost of enterprise, improves economic benefits.

Secondly, a plurality of welding spots are respectively arranged on the outer ring and the inner ring of the outer ring and the inner ring, so that the inner ring and the outer ring which are manufactured by winding have certain compressive strength, the gasket body is favorably and effectively connected, on one hand, certain compensation can be provided for the gasket body, and the phenomena of scattering and crushing of a metal winding belt are avoided; on the other hand, the inner ring and the outer ring are tightly attached to the metal wound gasket, the maximum compression degree of the gasket is controlled, the stress size and the stress direction of the inner ring and the outer ring of the gasket are consistent with those of theoretical analysis in the actual application process, the sealing equipment can run for a long time, and the possibility of leakage accidents is reduced.

Drawings

Fig. 1 is a schematic perspective view of a metal wound gasket according to an embodiment of the present invention;

fig. 2 is a schematic top view of a metal-wound gasket according to an embodiment of the present invention;

fig. 3 is a schematic cross-sectional view of a metal-wound gasket according to an embodiment of the present invention;

fig. 4 is a schematic view of a fitting structure of the metal-wound gasket and the flange according to an embodiment of the present invention.

Detailed Description

The following detailed description will be made in conjunction with the drawings and examples of the present invention, and the following examples are implemented on the premise of the technical solution of the present invention, and the detailed embodiments and specific operation processes are given, but the scope of the present invention is not limited to the following examples.

As shown in fig. 1 and 2, the metal-wound gasket is annular and includes an outer ring 1, a gasket body 2, and an inner ring 3, which are sequentially connected from outside to inside.

The outer ring 1 and the inner ring 3 have the same structural form and are both formed by coiling V-shaped or W-shaped steel strips. During winding, a certain tangential tension and radial pressing force of the metal strip are ensured, which directly influences the density and uniformity of winding. In order to ensure that the metal belt is tightly attached and not loosened, the metal belt is fixed by adopting a multi-spot welding mode after being wound, welding spots 4 are uniformly distributed along the circumferential direction, and the compression strength of the inner ring and the outer ring which are manufactured by winding is ensured to be uniform.

The gasket body 2 is formed by alternately winding a metal belt 21 and a non-metal flexible belt 22, is annular, and has a thickness larger than that of the outer ring 1 and the inner ring 3. In the overall structure, the radial cross-sectional shape of the body is similar to ">", that is, the body is convex outward along the horizontal plane when viewed from the outside, and the body is concave outward along the horizontal plane when viewed from the inside. In order to realize the effective winding of the gasket body, the non-metal flexible belt is made of flexible graphite material, the surface of the metal belt is provided with corrugations, so that the relative dislocation between the metal belt and the non-metal flexible belt is avoided during the winding to form a weak interface,

referring to fig. 3 for the installation of the outer ring 1, the gasket body 2 and the inner ring 3, a V-shaped matching groove 11 is arranged on the inner side of the outer ring 1, the matching groove 11 is located in the middle position of the thickness of the outer ring, and the matching groove 11 is matched with the protruding part of the gasket body 2, so that the protruding part of the gasket 2 is clamped in the groove 11 and is allowed to be loosened properly.

The inner side wall of the gasket body 2 is provided with a sunken part, the middle part of the inner ring is provided with an inserting part 31 protruding outwards along the radial direction, and the inserting part is embedded into the sunken part to realize the connection among the outer ring, the gasket body and the inner ring. When these two parts are assembled, grafting portion 31 and the 2 depressed parts of gasket body are closely laminated, guarantee that inner ring 3 can provide certain compensation for gasket body 2, avoid taking place the phenomenon that the metal winding area looses the frame and conquassation.

Fig. 4 is a schematic view of a usage state of the metal wound gasket in this embodiment. In the actual installation, earlier with the surperficial 51 clean up of gasket and flange, with the one side of gasket body 2 and flange face 51 suddenly contact, again with another flange 5 sticiss on the gasket, guarantee that the face 51 suddenly of two plane flanges closely laminates with gasket body 2 and does not leave the space, avoid leak passage's formation. Meanwhile, the position of the gasket is adjusted, the outer ring 1 is abutted to the flange bolt, the centering reliability is guaranteed, and the leakage condition caused by the position deviation of the gasket in the sealing process is prevented.

The outer ring of the outer ring 1 abuts against the bolt of the flange, so that the position of the gasket is ensured to be aligned with the required sealing part, the gasket is positioned in an auxiliary manner, and the possibility of sealing failure caused by incorrect position of the gasket is reduced; the inner ring 3 can provide certain compensation for the gasket body 2, and the phenomenon that the metal winding belt is scattered and crushed is avoided.

In this embodiment, because outer loop and inner ring all adopt the metal band to roll up the system and form for the inner and outer loop can directly be rolled up by the coiler and form, replaces the tradition and is formed by the steel sheet suppression manufacturing process, and inner and outer loop and winding gasket can share same processing equipment, directly take the place of processing by the coiler that produces the winding gasket, and is easy and simple to handle, and sealing performance is excellent, increases material utilization, reduces enterprise's operating cost, improves economic benefits.

In addition, the outer ring and the inner ring of the outer ring and the inner ring are respectively provided with a plurality of welding spots, so that the inner ring and the outer ring which are manufactured by winding have certain compressive strength, the gasket body is favorably and effectively connected, on one hand, certain compensation can be provided for the gasket body, and the phenomena of scattering and crushing of a metal winding belt are avoided; on the other hand, the inner ring and the outer ring are tightly attached to the metal wound gasket, the maximum compression degree of the gasket is controlled, the stress size and the stress direction of the inner ring and the outer ring of the gasket are consistent with those of theoretical analysis in the actual application process, the sealing equipment can run for a long time, and the possibility of leakage accidents is reduced.

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited thereto, and that various changes and modifications may be made without departing from the spirit of the invention.

Claims (6)

1. A metal winding type gasket is characterized by comprising an outer ring, a gasket body and an inner ring which are sequentially connected from outside to inside,

wherein the outer ring and the inner ring are both formed by rolling metal strips, the outer ring and the inner ring are respectively provided with a plurality of welding points,

the gasket body comprises a metal band and a non-metal flexible band wound on the metal band,

the thicknesses of the inner ring and the outer ring are smaller than that of the gasket body.

2. The metal wrap gasket of claim 1 wherein:

the inner ring and the outer ring are both made of V-shaped or W-shaped steel coils, and welding spots are uniformly distributed along the circumferential direction.

3. The metal wrap gasket of claim 1 wherein:

the radial cross section of the gasket body is in a '>' shape, the gasket body is outwards protruded along a horizontal plane when viewed from the outer side, and the gasket body is outwards sunken along the horizontal plane when viewed from the inner side.

4. The metal wrap gasket of claim 1 wherein:

wherein, the inner side of the outer ring is provided with a V-shaped matching groove, the outer side wall of the gasket body is provided with a bulge matched with the V-shaped matching groove,

the gasket body is characterized in that a concave part is arranged on the inner side wall of the gasket body, an insertion part which protrudes outwards is arranged in the middle of the inner ring along the radial direction, and the insertion part is embedded into the concave part.

5. The metal wound gasket of claim 4, wherein:

wherein the depth of the V-shaped matching groove is half of the thickness of the outer ring.

6. The metal wrap gasket of claim 1 wherein:

wherein, in the gasket body, the surface of the metal strip is provided with corrugations,

the non-metal flexible belt is made of flexible graphite material.

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