Seawater full-immersion type electric insulation screwed joint

Abstract

The utility model relates to the technical field of screwed joints, in particular to a seawater full-immersion type electrical insulation screwed joint, which utilizes double-layer protection, and the service life of a non-metal piece is shorter than that of a metal piece, so that the service life of the whole joint is prolonged; comprising a screwed joint; the device further comprises a square shoulder connector, a sealing gasket, a double-end jacket nut and the like, the sealing gasket is installed at the joint of the square shoulder connector and the threaded connector, the double-end jacket nut is installed on the threaded connector in a threaded fit mode, the square shoulder connector is sleeved with the double-end jacket nut for fixation, and the double-end jacket nut makes contact with the square shoulder connector through an insulating sleeve. The double-end outer sleeve nut is in contact connection with the square shoulder connector through the metal gasket and the insulation gasket, the sealing outer sleeve nut is connected with the double-end outer sleeve nut in a threaded fit mode, and the sealing outer sleeve nut is arranged on the square shoulder connector in a sleeving mode.

Description

Technical Field

[0001] The utility model relates to the technical field of threaded joints, in particular to a seawater fully immersed electrical insulation threaded joint. Background Art

[0002] A seawater fully immersed electrical insulation threaded joint is a specially designed joint used to achieve electrical insulation and connection functions in a seawater environment.

[0003] Among the existing threaded joints, for example, a threaded joint disclosed in the utility model patent with the application number 202321192946.3, the technical solution of this utility model can release the excessive stress generated by the inner seal and the interference fit of the shoulder, reduce the uneven pressure generated at the contact part between the internal threaded joint and the external threaded joint, so as to ensure stable external pressure sealing and compression performance.

[0004] However, during the use of the threaded joint, the direct contact between seawater and the metal joint will cause the rapid aging and corrosion of the material, reducing the service life of the material inlet end. Summary of the Utility Model

[0005] To solve the above technical problems, the utility model provides a seawater fully immersed electrical insulation threaded joint that utilizes double protection. Since the lifespan of the non-metal parts is less than that of the metal parts, the service life of the entire joint is extended.

[0006] The seawater fully immersed electrical insulation threaded joint of the utility model includes a threaded joint; it also includes a flat shoulder joint, a sealing gasket, a double-headed outer sleeve nut, O-ring 3, an insulating sleeve, a metal gasket, an insulating gasket, a sealing outer sleeve nut, O-ring 1, and O-ring 2. A sealing gasket is installed at the connection between the flat shoulder joint and the threaded joint. The double-headed outer sleeve nut is installed on the threaded joint through thread fit, and the double-headed outer sleeve nut is sleeved on the flat shoulder joint for fixation. The double-headed outer sleeve nut contacts the flat shoulder joint through the insulating sleeve, and the double-headed outer sleeve nut is in contact connection with the flat shoulder joint through the metal gasket and the insulating gasket. The sealing outer sleeve nut is connected to the double-headed outer sleeve nut through thread fit, and the sealing outer sleeve nut is sleeved on the flat shoulder joint. The sealing outer sleeve nut is connected to the flat shoulder joint through O-ring 2, the sealing outer sleeve nut is connected to the double-headed outer sleeve nut through O-ring 1, and the double-headed outer sleeve nut is connected to the threaded joint through O-ring 3; the first layer of protection is the non-metal sealing outer sleeve nut. When the sealing outer sleeve nut ages after about ten years, seawater can enter the insulating component. At this time, the lifespan of the insulating component can be reused for another ten years. If there is no first layer of protection, the lifespan of the insulating component needs to be replaced after about ten years. This structure can extend the service life of the original joint, reduce the maintenance rate, and utilize double protection. Since the lifespan of the non-metal parts is less than that of the metal parts, the service life of the entire joint is extended.

[0007] Preferably, the flat shoulder joint and the threaded joint are insulated; the insulation function is achieved through an insulation gasket, an insulation sleeve, and an insulation coating on the outside of the flat shoulder joint.

[0008] Preferably, the double-headed outer sleeve nut fixes the flat shoulder joint and the threaded joint; ensuring the sealing performance.

[0009] Preferably, a non-metallic seal outer sleeve nut sealing structure is added. O-ring 2 and O-ring 1 are respectively arranged axially and radially on the seal outer sleeve nut. At the same time, O-ring 3 is arranged inside the double-headed outer sleeve nut to prevent seawater from entering from both sides of the double-headed outer sleeve nut; in order to prevent seawater from entering the inside of the insulation component (insulation sleeve), causing the insulation component to age.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows: The first layer of protection is the non-metallic seal outer sleeve nut. When the seal outer sleeve nut ages after about ten years, seawater can enter the insulation component. At this time, the life of the insulation component can be reused for another ten years. If there is no first layer of protection, the life of the insulation component needs to be replaced after about ten years. This structure can extend the service life of the original joint and reduce the maintenance rate. Using double-layer protection, the life of the non-metallic part is less than that of the metal part, so the service life of the entire joint is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is an isometric structural schematic diagram of the present utility model;

[0012] Figure 2 is a right view structural schematic diagram of the present utility model;

[0013] Figure 3 is a rear view structural schematic diagram of the present utility model;

[0014] Figure 4 is a right view sectional structural schematic diagram of the present utility model;

[0015] Reference numerals in the drawings: 1. Threaded joint; 2. Flat shoulder joint; 3. Sealing gasket; 4. Double-headed outer sleeve nut; 5. O-ring 3; 6. Insulation sleeve; 7. Metal gasket; 8. Insulation gasket; 9. Seal outer sleeve nut; 10. O-ring 1; 11. O-ring 2. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] To facilitate the understanding of the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. The present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present utility model more thorough and comprehensive.

[0017] Embodiment 1

[0018] As Figures 1 to 4As shown in the figure, the seawater fully immersed electrical insulation threaded joint includes a threaded joint 1, and also includes a flat shoulder joint 2, a sealing gasket 3, a double-headed outer sleeve nut 4, an O-ring 35, an insulating sleeve 6, a metal gasket 7, an insulating gasket 8, a sealing outer sleeve nut 9, an O-ring 110, and an O-ring 211. A sealing gasket 3 is installed at the connection between the flat shoulder joint 2 and the threaded joint 1. The double-headed outer sleeve nut 4 is installed on the threaded joint 1 through thread fitting, and the double-headed outer sleeve nut 4 is sleeved on the flat shoulder joint 2 for fixation. The double-headed outer sleeve nut 4 contacts the flat shoulder joint 2 through the insulating sleeve 6, and the double-headed outer sleeve nut 4 is in contact connection with the flat shoulder joint 2 through the metal gasket 7 and the insulating gasket 8. The sealing outer sleeve nut 9 is connected to the double-headed outer sleeve nut 4 through thread fitting, and the sealing outer sleeve nut 9 is sleeved on the flat shoulder joint 2. The sealing outer sleeve nut 9 is connected to the flat shoulder joint 2 through the O-ring 211, and the sealing outer sleeve nut 9 is connected to the double-headed outer sleeve nut 4 through the O-ring 110. The double-headed outer sleeve nut 4 is connected to the threaded joint 1 through the O-ring 35;

[0019] The flat shoulder joint 2 and the threaded joint 1 are insulated;

[0020] The double-headed outer sleeve nut 4 fixes the flat shoulder joint 2 and the threaded joint 1;

[0021] A non-metallic sealing outer sleeve nut 9 sealing structure is added. O-rings 2 and 1 are respectively arranged axially and radially on the sealing outer sleeve nut 9. At the same time, an O-ring 3 is arranged inside the double-headed outer sleeve nut 4 to prevent seawater from entering from both sides of the double-headed outer sleeve nut 4;

[0022] This joint is mainly used for insulated connection between pipelines immersed in seawater and between pipelines and equipment. The first layer of protection is the non-metallic sealing outer sleeve nut. When the sealing outer sleeve nut ages after about ten years, seawater can enter the insulation component. At this time, the life of the insulation component can be reused for another ten years. If there is no first layer of protection, the life of the insulation component needs to be replaced after about ten years. This structure can extend the service life of the original joint and reduce the maintenance rate. This utility model uses double-layer protection. The life of the non-metallic parts is less than that of the metal parts, so the service life of the entire joint is extended.

[0023] Such as Figures 1 to 4 As shown in the figure, for the seawater fully immersed electrical insulation threaded joint of the present utility model, when it works, this joint is mainly used for insulated connection between pipelines immersed in seawater and between pipelines and equipment. The first layer of protection is the non-metallic sealing outer sleeve nut. When the sealing outer sleeve nut ages after about ten years, seawater can enter the insulation component. At this time, the life of the insulation component can be reused for another ten years. If there is no first layer of protection, the life of the insulation component needs to be replaced after about ten years. This structure can extend the service life of the original joint and reduce the maintenance rate.

[0024] The main functions achieved by the present utility model are as follows: during the working process of the threaded joint, the present utility model utilizes double protection. Since the service life of the non-metallic part is less than that of the metallic part, the service life of the entire joint is extended.

[0025] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art of this technology, without departing from the technical principle of the present utility model, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. Submerged-in-seawater electrical insulation threaded joint, comprising a threaded joint (1); characterized in that, It also includes a flat shoulder joint (2), a sealing gasket (3), a double-headed outer sleeve nut (4), an O-ring 3 (5), an insulating sleeve (6), a metal gasket (7), an insulating gasket (8), a sealing outer sleeve nut (9), an O-ring 1 (10) and an O-ring 2 (11). A sealing gasket (3) is installed at the connection between the flat shoulder joint (2) and the threaded joint (1). The double-headed outer sleeve nut (4) is installed on the threaded joint (1) through thread fit, and the double-headed outer sleeve nut (4) is sleeved on the flat shoulder joint (2) for fixation. The double-headed outer sleeve nut (4) contacts the flat shoulder joint (2) through the insulating sleeve (6), and the double-headed outer sleeve nut (4) is in contact connection with the flat shoulder joint (2) through the metal gasket (7) and the insulating gasket (8). The sealing outer sleeve nut (9) is connected with the double-headed outer sleeve nut (4) through thread fit, and the sealing outer sleeve nut (9) is sleeved on the flat shoulder joint (2). The sealing outer sleeve nut (9) is connected with the flat shoulder joint (2) through the O-ring 2 (11), the sealing outer sleeve nut (9) is connected with the double-headed outer sleeve nut (4) through the O-ring 1 (10), and the double-headed outer sleeve nut (4) is connected with the threaded joint (1) through the O-ring 3 (5).

2. The seawater fully-immersed electrical insulation threaded joint according to claim 1, characterized in that, The flat shoulder joint (2) and the threaded joint (1) are insulated.

3. The seawater fully-immersed electrical insulation threaded joint according to claim 2, wherein The double-headed outer sleeve nut (4) fixes the flat shoulder joint (2) and the threaded joint (1).

4. The seawater fully-immersed electrical insulation threaded joint according to claim 3, wherein A non-metallic sealing outer sleeve nut (9) sealing structure is added. The O-ring 2 and the O-ring 1 are respectively arranged axially and radially on the sealing outer sleeve nut (9), and at the same time, the O-ring 3 is arranged inside the double-headed outer sleeve nut (4) to prevent seawater from entering from both sides of the double-headed outer sleeve nut (4).

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