High-pressure sealing device of ultrahigh-pressure container

Abstract

The invention discloses a high-pressure sealing device for an ultrahigh-pressure container. The high-pressure sealing device comprises a set screw, a blanking cap, a cylinder barrel, a backing ring, a Y-shaped elastic ring, an upper triangular ring, an upper supporting ring, a locking nut, a lower triangular ring, a special-shaped supporting ring and an O-shaped ring. A triangular expansion and self-compensation principle is adopted, an O-shaped ring is used for sealing when the pressure in a cavity is low, a sealing structure is formed when the pressure in the cavity is increased, meanwhile, the whole sealing structure forms different sealing modes in a low-pressure area and a high-pressure area, the action time is shortened, the service life is prolonged, dynamic sealing can be formed, and the sealing effect is good. And a self-adaptive function is realized.

Description

Technical Field

[0001] The present invention relates to a sealing device, in particular to a high-pressure sealing device for an ultra-high-pressure container, involving a pressure range of 100 MPa to 1600 MPa, and belongs to the technical field of mechanical tools. Background Art

[0002] The commonly used sealing structure of ultra-high pressure containers at present is a spherical surface and a conical surface for sealing, and the pressure applied between the conical surface and the spherical surface is used to squeeze the spherical surface, causing it to deform slightly to achieve sealing; the above technical scheme realizes the sealing function to a certain extent, but for the liquid pressure of more than 100MPa borne by the ultra-high pressure container, the pressure variation range is 0MPa~1000MPa, and the pressure variation range is large. It is easy to cause metal fatigue during long-term use, causing the metal elasticity to disappear. Since the above sealing structure is a single seal, leakage will directly occur after metal fatigue, affecting the reliable service life of the ultra-high pressure container; therefore, there is an urgent need for a sealing device that can extend the service life and has a good sealing effect under the ultra-high pressure state borne by the ultra-high pressure container. Summary of the invention

[0003] The object of the present invention is to provide a novel high-pressure sealing device for an ultra-high pressure container, so as to achieve the purpose of extending the service life of the sealing device under ultra-high pressure conditions.

[0004] The technical solution to achieve the purpose of the present invention is:

[0005] A high-pressure sealing device for an ultra-high-pressure container comprises a set screw (1), a plug cover (2), a cylinder (3), a gasket (4), a Y-shaped elastic ring (5), an upper triangular ring (6), an upper support ring (7), a locking nut (8), a lower triangular ring (9), a heterogeneous support ring (10) and an O-ring (11); the plug cover (2) is a step shaft structure, a through hole is provided at the step of the step shaft structure for installing the set screw (1), the outer diameter of the end with a smaller step diameter is consistent with the inner diameter of the lower triangular ring (9) and the heterogeneous support ring (10), and the outer diameter of the end with a larger step diameter is consistent with the outer diameter of the cylinder (3), and the plug cover is made of high-strength hard alloy steel material.

[0006] Furthermore, the set screw (1) is a standard screw.

[0007] Furthermore, the plug cover (2) is a stepped shaft structure, and a through hole for installing a set screw (1) is provided at the step of the stepped shaft structure. The outer diameter of the smaller end of the step diameter is consistent with the inner diameter of the lower triangular ring (9) and the anisotropic support ring (10), and the outer diameter of the larger end of the step diameter is consistent with the outer diameter of the cylinder (3). The plug cover (2) is made of high-strength hard alloy steel. The cylinder (3) is a hollow cylindrical structure, and screw holes matching the number and size of the through holes of the plug cover (2) are provided at both ends thereof. The set screw (1) is connected to the plug cover (2) through the above screw holes. The inner diameter of the cylinder (3) is consistent with the outer diameter of the upper triangular ring (6) and the upper support ring (7), and the outer diameter of the cylinder (3) is consistent with the outer diameter of the plug cover (2).

[0008] Furthermore, the gasket (4) is a disc-shaped part whose cross section is consistent with the cross section of the cylinder (3), and through holes whose number and size match those of the through holes of the plug cover (2) are provided at both ends thereof for connecting the plug cover (2) via a set screw 1. The inner diameter of the gasket (4) is larger than the inner diameter of the cylinder (3) and is used to place a locking nut 8; the outer diameter of the gasket (4) is consistent with the outer diameter of the plug cover (2).

[0009] Furthermore, the Y-shaped elastic ring (5) is an annular part with a Y-shaped cross section. A nut for use with a locking nut 8 is arranged on the outer diameter side of the non-open end of the Y-shaped elastic ring (5). A rectangular backing groove is arranged at the root of the open end and the root of the thread opened at the non-open end of the Y-shaped elastic ring (5). The Y-shaped elastic ring (5) is made of a high-strength elastic metal material. The maximum diameter of the Y-shaped elastic ring (5) should be smaller than the inner diameter of the cylinder (3), and the minimum diameter of the Y-shaped elastic ring (5) is larger than the outer diameter of the small section of the plug cover 2.

[0010] Furthermore, the upper triangular ring (6) is a triangular ring with the inclined surface facing the inner diameter direction, and a rectangular groove is opened on the straight side at the outer diameter to place the O-ring, and its taper is consistent with the taper of the Y-shaped elastic ring (5) so as to fit tightly with the Y-shaped elastic ring (5).

[0011] Furthermore, the upper support ring (7) is a circular ring-shaped part, whose inner diameter is larger than the outer diameter of the non-open end of the Y-shaped elastic ring (5), and the outer diameter is consistent with the inner diameter of the cylinder (3), and the upper support ring (7) is made of high-strength wear-resistant non-elastic material.

[0012] Furthermore, the locking nut (8) is a standard thin nut.

[0013] Furthermore, the lower triangular ring (9) is a triangular ring with the inclined surface facing the outer diameter direction, and a rectangular groove is opened on the straight side at the inner diameter to place the O-ring, and its taper is consistent with the taper of the Y-shaped elastic ring (5) so as to fit tightly with the Y-shaped elastic ring (5).

[0014] Furthermore, the anisotropic support ring (10) is a hollow stepped shaft structure, in which a rectangular groove is provided at the outer diameter of the hollow cavity to place an O-ring (11), wherein the outer diameter of the hollow cavity is consistent with the outer diameter of the smaller diameter section of the plug cover (2), the smaller step outer diameter is smaller than the minimum inner diameter of the lower triangular ring (9), and the larger step outer diameter is consistent with the inner diameter of the non-open end of the Y-shaped elastic ring (5).

[0015] Furthermore, the O-ring (11) is a standard O-ring.

[0016] Compared with the prior art, the present invention has the following significant advantages:

[0017] (1) The present invention adopts the principle of triangular expansion and self-compensation. When the pressure inside the cavity is low, the O-ring is used for sealing. The Y-shaped elastic ring (5), the upper triangular ring (6) and the lower triangular ring (9) do not deform, thereby protecting the Y-shaped elastic ring (5), the upper triangular ring (6) and the lower triangular ring (9) from wear. When the pressure inside the cavity increases, the Y-shaped elastic ring (5) expands to both sides, squeezing the upper triangular ring (6) and the lower triangular ring (9) closer to the inside of the cavity, thereby forming a sealing structure. At the same time, the O-ring is squeezed into the groove provided in advance, thereby protecting the O-ring. Thus, the overall sealing structure forms different sealing forms in the low-pressure area and the high-pressure area, thereby reducing its action time and increasing its service life.

[0018] (2) When the upper triangular ring (6) and the lower triangular ring (9) are worn, the upper triangular ring (6) and the lower triangular ring (9) can adapt their positions in the cavity according to the magnitude of the expansion force, thereby forming a dynamic seal, which has an adaptive function. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional schematic diagram of the present invention.

[0020] Figure 2 for Figure 1 A partial cross-sectional view of .

[0021] Figure 3 This is the front view of the plug cover 2.

[0022] Figure 4 It is the left view of the plug cover 2.

[0023] Figure 5 It is the front view of cylinder 3.

[0024] Figure 6 It is the left view of cylinder 3.

[0025] Figure 7 It is a cross-sectional view of the Y-shaped elastic ring 5.

[0026] Figure 8 It is a cross-sectional view of the upper triangular ring 6.

[0027] Fig. 9 It is a cross-sectional view of the lower triangular ring 9.

[0028] Fig.10 It is a cross-sectional view of the anisotropic support ring 10. DETAILED DESCRIPTION

[0029] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0030] A high-pressure sealing device for an ultra-high-pressure container, comprising a set screw (1), a plug cover (2), a cylinder (3), a gasket (4), a Y-shaped elastic ring (5), an upper triangular ring (6), an upper support ring (7), a locking nut (8), a lower triangular ring (9), a heterogeneous support ring (10) and an O-ring (11); the plug cover (2) is a stepped shaft structure, a through hole is provided at the step of the stepped shaft structure for installing the set screw (1), the outer diameter of the smaller end of the step diameter is consistent with the inner diameter of the lower triangular ring (9) and the heterogeneous support ring (10) , the outer diameter of the larger end of the step diameter is consistent with the outer diameter of the cylinder (3), and the plug cover is made of high-strength hard alloy steel material; the set screw (1) is a standard screw; the plug cover (2) is a step shaft structure, and a through hole for installing the set screw (1) is opened at the step of the step shaft structure, the outer diameter of the smaller end of the step diameter is consistent with the inner diameter of the lower triangular ring (9) and the anisotropic support ring (10), and the outer diameter of the larger end of the step diameter is consistent with the outer diameter of the cylinder (3), and the plug cover (2) is made of high-strength hard alloy steel material. The cylinder (3) is a hollow cylindrical structure, and screw holes matching the number and size of the through holes of the plug cover (2) are opened at both ends of the cylinder (3), and the set screw (1) is connected to the plug cover (2) through the above screw holes, the inner diameter of the cylinder (3) is consistent with the outer diameter of the upper triangular ring (6) and the upper support ring (7), and the outer diameter of the cylinder (3) is consistent with the outer diameter of the plug cover (2).

[0031] The gasket (4) is a disc-shaped part with a cross section consistent with that of the cylinder barrel (3). Through holes matching the number and size of the through holes of the plug cover (2) are provided at both ends thereof for connecting the plug cover (2) via a set screw 1. The inner diameter of the gasket (4) is larger than the inner diameter of the cylinder barrel (3) and is used to place a locking nut 8. The outer diameter of the gasket (4) is consistent with that of the plug cover (2).

[0032] The Y-shaped elastic ring (5) is an annular part with a Y-shaped cross section. A nut for use with a locking nut 8 is arranged on the outer diameter side of the non-open end of the Y-shaped elastic ring (5). A rectangular backing groove is arranged at the root of the open end and the root of the thread opened at the non-open end of the Y-shaped elastic ring (5). The Y-shaped elastic ring (5) is made of a high-strength elastic metal material. The maximum diameter of the Y-shaped elastic ring (5) should be smaller than the inner diameter of the cylinder (3), and the minimum diameter of the Y-shaped elastic ring (5) is larger than the outer diameter of the small section of the plug cover 2.

[0033] The upper triangular ring (6) is a triangular ring with the inclined surface facing the inner diameter direction. A rectangular groove is provided on the straight side at the outer diameter to accommodate an O-ring. The taper of the upper triangular ring (6) is consistent with the taper of the Y-shaped elastic ring (5) so as to fit tightly with the Y-shaped elastic ring (5).

[0034] The upper support ring (7) is a circular ring-shaped part, whose inner diameter is larger than the outer diameter of the non-open end of the Y-shaped elastic ring (5) and whose outer diameter is consistent with the inner diameter of the cylinder (3). The upper support ring (7) is made of high-strength wear-resistant non-elastic material.

[0035] The locking nut (8) is a standard thin nut.

[0036] The lower triangular ring (9) is a triangular ring with the inclined surface facing the outer diameter direction. A rectangular groove is provided on the straight side at the inner diameter to accommodate an O-ring. The taper of the lower triangular ring (9) is consistent with the taper of the Y-shaped elastic ring (5) so as to fit tightly with the Y-shaped elastic ring (5).

[0037] The anisotropic support ring (10) is a hollow stepped shaft structure, in which a rectangular groove is provided at the outer diameter of the hollow cavity to place an O-ring (11), wherein the outer diameter of the hollow cavity is consistent with the outer diameter of the smaller diameter section of the plug cover (2), the smaller step outer diameter is smaller than the minimum inner diameter of the lower triangular ring (9), and the larger step outer diameter is consistent with the inner diameter of the non-open end of the Y-shaped elastic ring (5).

[0038] The O-ring (11) is a standard O-ring

[0039] As shown in the accompanying drawings, an installation method of a high-pressure sealing device for an ultra-high-pressure container is as follows: an O-ring (11) is placed in a rectangular groove formed by a heterosexual support ring (10), and then the combination of the O-ring (11) and the heterosexual support ring (10) is installed on the smaller diameter step of the plug cover (2), and a locking nut (8) is inserted into the outer side of the combination of the O-ring (11) and the heterosexual support ring (10); an upper triangular ring (6) and an upper support ring (7) are inserted into the outer side of a Y-shaped elastic ring (5), and then the O-ring (11) is placed in the rectangular groove formed by the upper triangular ring (6), and the combination formed by the upper triangular ring (6), the upper support ring (7), the Y-shaped elastic ring (5) and the O-ring (11) is placed on the outer diameter of the heterosexual support ring (10), and the screw on the Y-shaped elastic ring (5) is used to tighten the O-ring (11). The thread of the Y-shaped elastic ring (5) is slightly connected with the locking nut (8) to ensure that the upper triangular ring (6) and the lower triangular ring (9) are still in an active state. The assembly formed by the Y-shaped elastic ring (5), the upper triangular ring (6), the upper support ring (7), the locking nut (8), the lower triangular ring (9), the anisotropic support ring (10), the O-ring (11) and the plug cover (2) is inserted into the inner side of the cylinder barrel (3). The thread fit between the locking nut (8) and the Y-shaped elastic ring (5) is finely adjusted. A transition fit is formed between the assembly and the cylinder barrel (3). The assembly is then removed from the cylinder barrel (3). Gaskets (4) are placed on both sides of the cylinder barrel (3). The assembly is installed in the inner holes of the cylinder barrel (3) and the gasket (4). Then, the plug cover (2), the cylinder barrel (3) and the gasket (4) are connected by means of set screws (1).

[0040] The above-mentioned embodiments only express certain implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be based on the attached claims.

Claims

1. A high-pressure sealing device for an ultra-high-pressure container, characterized in that: A set screw (1), a plug cover (2), a cylinder (3), a gasket (4), a Y-shaped elastic ring (5), an upper triangular ring (6), an upper support ring (7), a locking nut (8), a lower triangular ring (9), a heterogeneous support ring (10) and an O-ring (11); the plug cover (2) is a step shaft structure, and a through hole is provided at the step of the step shaft structure for installing the set screw (1); the outer diameter of the end with a smaller step diameter is consistent with the inner diameter of the lower triangular ring (9) and the heterogeneous support ring (10), and the outer diameter of the end with a larger step diameter is consistent with the outer diameter of the cylinder (3); the plug cover is made of high-strength hard alloy steel material.

2. The high-pressure sealing device for an ultra-high-pressure container according to claim 1, characterized in that: The cylinder (3) is a hollow cylindrical structure, with screw holes at both ends thereof matching the number and size of the through holes of the plug cover (2), and the set screws (1) are connected to the plug cover (2) through the screw holes. The inner diameter of the cylinder (3) is consistent with the outer diameters of the upper triangular ring (6) and the upper support ring (7), and the outer diameter of the cylinder (3) is consistent with the outer diameter of the plug cover (2).

3. The high-pressure sealing device for an ultra-high-pressure container according to claim 1, characterized in that: The gasket (4) is a disc-shaped part with a cross section consistent with that of the cylinder barrel (3). Through holes matching the number and size of the through holes of the plug cover (2) are provided at both ends thereof for connecting the plug cover (2) via a set screw 1. The inner diameter of the gasket (4) is larger than the inner diameter of the cylinder barrel (3) and is used to place a locking nut 8. The outer diameter of the gasket (4) is consistent with that of the plug cover (2).

4. The high-pressure sealing device for an ultra-high-pressure container according to claim 1, characterized in that: The Y-shaped elastic ring (5) is an annular part with a Y-shaped cross section. A nut for use with a locking nut 8 is arranged on the outer diameter side of the non-open end of the Y-shaped elastic ring (5). A rectangular backing groove is arranged at the root of the open end and the root of the thread opened at the non-open end of the Y-shaped elastic ring (5). The Y-shaped elastic ring (5) is made of a high-strength elastic metal material. The maximum diameter of the Y-shaped elastic ring (5) should be smaller than the inner diameter of the cylinder (3), and the minimum diameter of the Y-shaped elastic ring (5) is larger than the outer diameter of the small section of the plug cover 2.

5. The high-pressure sealing device for an ultra-high-pressure container according to claim 1, characterized in that: The upper triangular ring (6) is a triangular ring with the inclined surface facing the inner diameter direction. A rectangular groove is provided on the straight side at the outer diameter to place the O-ring. The taper of the upper triangular ring (6) is consistent with the taper of the Y-shaped elastic ring (5) so as to fit tightly with the Y-shaped elastic ring (5).

6. The high-pressure sealing device for an ultra-high-pressure container according to claim 1, characterized in that: The upper support ring (7) is a circular ring-shaped part, whose inner diameter is larger than the outer diameter of the non-open end of the Y-shaped elastic ring (5) and whose outer diameter is consistent with the inner diameter of the cylinder (3). The upper support ring (7) is made of high-strength wear-resistant non-elastic material.

7. The high-pressure sealing device for an ultra-high-pressure container according to claim 1, characterized in that: The lower triangular ring (9) is a triangular ring with the inclined surface facing the outer diameter direction. A rectangular groove is provided on the straight side at the inner diameter to place the O-ring. The taper of the lower triangular ring (9) is consistent with the taper of the Y-shaped elastic ring (5) so as to fit tightly with the Y-shaped elastic ring (5).

8. The high-pressure sealing device for an ultra-high-pressure container according to claim 1, characterized in that: The anisotropic support ring (10) is a hollow stepped shaft structure, in which a rectangular groove is provided at the outer diameter of the hollow cavity to accommodate an O-ring (11), wherein the outer diameter of the hollow cavity is consistent with the outer diameter of the smaller diameter section of the plug cover (2), the smaller step outer diameter is smaller than the minimum inner diameter of the lower triangular ring (9), and the larger step outer diameter is consistent with the inner diameter of the non-open end of the Y-shaped elastic ring (5).

9. The high-pressure sealing device for an ultra-high-pressure container according to claim 1, characterized in that: The plugging cover (2) is a stepped shaft structure, and a through hole for installing a set screw (1) is provided at the step of the stepped shaft structure. The outer diameter of the smaller end of the step is consistent with the inner diameter of the lower triangular ring (9) and the anisotropic support ring (10), and the outer diameter of the larger end of the step is consistent with the outer diameter of the cylinder (3). The plugging cover (2) is made of high-strength hard alloy steel material.

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