Insulation joint

Abstract

The utility model relates to the technical field of oil and gas transportation pipelines, in particular to an insulating joint, which comprises a flange, two ends of which are respectively connected with a transportation pipeline; the flange sleeves the outer wall of the flange; the insulating sleeve is arranged between the flange inner wall and the flange outer wall; by means of the structural design, attenuation of the electrical performance of the insulating joint caused by electric sparks generated by a pipeline can be prevented, a cavity structure is arranged between the flange and the flange, the sealing ring between the flange and the flange is prevented from being excessively extruded to be damaged, the sealing performance of the insulating joint is improved, the service life of the insulating joint is prolonged, and the service life of the insulating joint is prolonged. Point discharge at the corner of the flange can be avoided, and damage caused by high-voltage discharge of the insulating joint is reduced.

Description

Technical Field

[0001] The present application generally relates to the technical field of oil and gas pipelines, and in particular to an insulating joint. Background Art

[0002] In modern oil and gas transportation systems, pipeline corrosion has always been a significant factor affecting their safety and service life. Traditional metal pipelines are susceptible to electrochemical corrosion in buried and underwater environments due to electrochemical reactions in the soil or water. This corrosion not only leads to oil or gas leaks but can also cause serious environmental pollution and economic losses. Therefore, it is crucial to employ effective methods to improve pipeline corrosion resistance.

[0003] As an early pipe connection component, insulating flanges provide electrical insulation at the joint, reducing the flow of current between pipes and thus preventing electrochemical corrosion to a certain extent. However, insulating flanges still have some limitations in practical applications. To overcome these shortcomings, the design concept of insulating joints has emerged.

[0004] Due to the relatively simple structure of the insulating joint, there are deficiencies in the processing of the insulating joint and the operation of the pipeline. In the actual production and processing process, the internal insulating parts and steel parts of the insulating joint cannot be guaranteed to be completely insulated, and a current conduction loop will appear, resulting in the loss of the product's electrical insulation performance. When a strong electric field is applied, arc excitation occurs internally, causing electric sparks. Utility Model Content

[0005] In order to solve the problem that in the use of existing insulating joints, a current loop is easily formed when current passes through the insulating parts and steel parts, resulting in the loss of electrical insulation performance of the product, the present application provides an insulating joint to improve the insulation performance between the insulating parts and steel parts in the insulating joint and improve the isolation between metal parts and non-metallic parts.

[0006] According to one aspect of the present application, an insulating joint is provided, which includes a flange, with both ends respectively connected to a conveying pipeline; and a flange, which is sleeved on the outer wall of the flange; an insulating sleeve, which is arranged between the inner wall of the flange and the outer wall of the flange; and an insulating plate, which is arranged in the flange, and the circumferential outer wall of the insulating plate passes through the inner wall of the flange and is connected to one end of the insulating sleeve.

[0007] In some embodiments, the insulating plate is an annular plate, and the inner diameters of the annular plate and the flange are the same; an annular groove is provided on the inner wall of the flange, and the annular groove is concentrically arranged with the flange; wherein the annular groove is centered along the axial direction of the inner wall of the flange; the insulating plate is arranged in the annular groove.

[0008] In some embodiments, the outer wall of the flange is provided with an annular mounting groove, which is concentrically arranged with the flange; wherein the annular mounting groove is used to install the flange; wherein the annular mounting groove is open near one end of the insulating sleeve; and the insulating sleeve is arranged between the annular mounting groove and the flange.

[0009] In some embodiments, an inner wall of the annular mounting groove is provided with an insulating coating.

[0010] In some embodiments, a threaded hole is provided on the surface of the flange; wherein the threaded hole passes through the flange body, and one end of the threaded hole is connected to the gap between the flange and the flange; a threaded tube is provided in the threaded hole, and the threaded tube is threadedly connected to the threaded hole, and a one-way valve is provided at the end of the threaded tube away from the flange; wherein a dustproof gasket is provided at the end of the one-way valve away from the threaded tube; and a blocking cover is provided at the end of the dustproof gasket away from the one-way valve.

[0011] In some embodiments, an annular groove is further provided with an annular rubber ring mounting groove at one end close to the annular mounting groove; the annular rubber ring mounting groove is concentrically arranged with the flange; the annular rubber ring mounting groove is connected with the annular mounting groove; a rubber sealing ring is provided in the annular rubber ring mounting groove; the inner wall of the rubber sealing ring is connected to the insulating plate, and one side of the outer wall is connected to one end of the insulating sleeve.

[0012] The embodiments of the present application have the following advantages.

[0013] First, use a flange with an insulating plate to connect the two conveying pipelines, then place the insulating sleeve in the flange of the annular structure, and finally weld the flange to the outer wall of the flange. When electric sparks are generated on the outer wall of the conveying pipeline, the current passing through the flange is blocked by the insulating plate. At the same time, when the current passes through the outer wall of the flange, it is blocked by the insulating sleeve. Therefore, when electric sparks are generated in the conveying pipeline on one side of the flange, the current passing through the insulating plate and the insulating sleeve is blocked and cannot continue to be transmitted to the other conveying pipeline. There is a cavity structure between the flange and the flange, and an insulating sleeve is arranged in the cavity, so as to avoid tip discharge between the two metal parts of the flange and the flange, thereby ensuring the performance and service life of the insulating joint.

[0014] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be achieved and obtained by the structures particularly pointed out in the written description and the accompanying drawings.

[0015] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 A schematic diagram of installing an insulating joint according to an embodiment of the present application is shown.

[0018] Figure 2 A schematic diagram of flange installation according to an embodiment of the present application is shown.

[0019] Figure 3 A schematic diagram of the insulating coating application position according to one embodiment of the present application is shown.

[0020] Figure 4 Show Figure 3 Schematic diagram of the enlarged area A in the middle.

[0021] Figure 5 A schematic diagram of installing an insulation board according to an embodiment of the present application is shown.

[0022] Figure 6 A schematic diagram of a flange structure according to an embodiment of the present application is shown.

[0023] Reference numerals

[0024] 1- flange;

[0025] 11- annular groove;

[0026] 2- flange;

[0027] 21-annular mounting groove; 22-insulating coating; 23-threaded hole; 24-threaded pipe; 25-check valve; 26-dustproof gasket; 27-blocking cover;

[0028] 3-Insulation sleeve; 4-Insulation board;

[0029] 41-annular rubber ring installation groove; 42-rubber sealing ring. DETAILED DESCRIPTION

[0030] In order to make the purpose, scheme and advantages of the technical solution of this application clearer, the following will be combined with the drawings of the specific embodiments of this application to clearly and completely describe the technical solution of the embodiment of this application. Unless otherwise specified, the terms used in this article have the common meanings in the art. The same reference numerals in the drawings represent the same components.

[0031] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0032] As described above, in the use of traditional insulating joints, since the internal insulating parts and steel parts of the insulating joints cannot be completely insulated during the actual production and processing process, a current conduction loop will appear, resulting in the loss of the product's electrical insulation performance. Moreover, when a strong electric field is applied, arc excitation will occur internally, causing electric sparks.

[0033] To at least partially address one or more of the aforementioned and other potential issues, an exemplary embodiment of the present application provides an insulating joint comprising a flange, each end of which is connected to a transmission pipeline; a flange sleeve mounted on the outer wall of the flange; an insulating sleeve disposed between the inner wall of the flange and the outer wall of the flange; and an insulating plate disposed within the flange, the circumferential outer wall of the insulating plate passing through the inner wall of the flange and connected to one end of the insulating sleeve. This prevents sparks from the pipeline and the resulting degradation of the electrical performance of the insulating joint. A cavity structure exists between the flange and the flange, preventing damage to the sealing ring between the two due to excessive extrusion. Discharge at sharp corners of the flange is also avoided, reducing damage to the insulating joint caused by high-voltage discharge.

[0034] The insulating joint according to the embodiment of the present application is exemplarily described below with reference to the accompanying drawings. Figure 1 A schematic diagram of installing an insulating joint according to an embodiment of the present application is shown.

[0035] An insulating joint includes: a flange 1, with both ends connected to a conveying pipeline; a flange 2, which is sleeved on the outer wall of the flange 1; an insulating sleeve 3, which is arranged between the inner wall of the flange 2 and the outer wall of the flange 1; and an insulating plate 4, which is arranged in the flange 1, with the circumferential outer wall of the insulating plate 4 passing through the inner wall of the flange 1 and connected to one end of the insulating sleeve 3.

[0036] During use, the two conveying pipelines are first connected using the flange 1 with the insulating plate 4, and then the insulating sleeve 3 is placed in the flange 2 of the annular structure, and finally the flange 2 is welded to the outer wall of the flange 1. When electric sparks are generated on the outer wall of the conveying pipeline, the current passing through the flange 1 is blocked by the insulating plate 4. At the same time, when the current passes through the outer wall of the flange 1, it is blocked by the insulating sleeve 3. Therefore, when electric sparks are generated in the conveying pipeline on one side of the flange 1, the current passing through the insulating plate 4 and the insulating sleeve 3 is blocked and cannot continue to be transmitted to the other conveying pipeline. There is a cavity structure between the flange 1 and the flange 2, and the insulating sleeve 3 is arranged in the cavity, so as to avoid tip discharge between the two metal parts of the flange 1 and the flange 2, thereby ensuring the performance and service life of the insulating joint.

[0037] Figure 1 A schematic diagram of installing an insulating joint according to an embodiment of the present application is shown. Figure 2 A schematic diagram of flange installation according to an embodiment of the present application is shown.

[0038] In some embodiments, the insulating plate 4 is an annular plate, and the inner diameter of the annular plate and the flange 1 are the same; the inner wall of the flange 1 is provided with an annular groove 11, and the annular groove 11 is concentrically arranged with the flange 1; wherein the annular groove 11 is arranged in the center along the axial direction of the inner wall of the flange 1; the insulating plate 4 is arranged in the annular groove 11.

[0039] During use, the insulating plate 4 is an annular plate, and the inner diameter of the annular plate is the same as the inner diameter of the flange 1, so that when the conveying pipeline passes through the flange 1, the insulating plate 4 will not cause obstruction to the conveying medium in the conveying pipeline. The annular groove 11 is used to install the insulating plate 4. Since the annular groove 11 is centered in the flange 1, the insulating plate 4 in the annular groove 11 is connected to one end of the insulating sleeve 3, and the insulating sleeve 3 and the insulating plate 4 form a cup-shaped structure. The cup-shaped structure cover is provided at one end of the energized conveying pipeline, so that the conveying pipelines at both ends of the flange 1 cannot form a return circuit.

[0040] Figure 1 A schematic diagram of installing an insulating joint according to an embodiment of the present application is shown. Figure 2 A schematic diagram of flange installation according to an embodiment of the present application is shown. Figure 5 A schematic diagram of installing an insulation board according to an embodiment of the present application is shown. Figure 6 A schematic diagram of a flange structure according to an embodiment of the present application is shown.

[0041] In some embodiments, an annular mounting groove 21 is provided on the outer wall of the flange 1, and the annular mounting groove 21 is concentrically arranged with the flange 1; wherein the annular mounting groove 21 is used to install the flange 2; wherein the annular mounting groove 21 is open at one end close to the insulating sleeve 3; the insulating sleeve 3 is arranged between the annular mounting groove 21 and the flange 2.

[0042] During use, one end of the annular mounting groove 21 close to the insulating sleeve 3 is open. When installing the flange 2, the annular flange 2 can be inserted into the outer wall of the flange 1 from one side of the flange 1 and then welded.

[0043] Figure 1 A schematic diagram of installing an insulating joint according to an embodiment of the present application is shown. Figure 2 A schematic diagram of flange installation according to an embodiment of the present application is shown. Figure 3 A schematic diagram of the insulating coating application position according to one embodiment of the present application is shown. Figure 4 Show Figure 3 Schematic diagram of the enlarged area A in the middle. Figure 5 A schematic diagram of installing an insulation board according to an embodiment of the present application is shown. Figure 6 A schematic diagram of a flange structure according to an embodiment of the present application is shown.

[0044] In some embodiments, an insulating coating 22 is provided on the inner wall of the annular mounting groove 21 .

[0045] In use, the insulating coating 22 is applied to the outer wall of the flange 1 and to the side of the outer wall of the flange 1 away from the insulating sleeve 3 , so that the flange 1 away from the insulating sleeve 3 and the convex ring are insulated by the insulating coating 22 .

[0046] Figure 1 A schematic diagram of installing an insulating joint according to an embodiment of the present application is shown. Figure 2 A schematic diagram of flange installation according to an embodiment of the present application is shown. Figure 3 A schematic diagram of the insulating coating application position according to one embodiment of the present application is shown. Figure 4 Show Figure 3 Schematic diagram of the enlarged area A in the middle. Figure 5 A schematic diagram of installing an insulation board according to an embodiment of the present application is shown. Figure 6 A schematic diagram of a flange structure according to an embodiment of the present application is shown.

[0047] In some embodiments, a threaded hole 23 is provided on the surface of the flange 2; wherein the threaded hole 23 passes through the body of the flange 2, and one end of the threaded hole 23 is connected to the gap between the flange 2 and the flange 1; a threaded tube 24 is provided in the threaded hole 23, and the threaded tube 24 is threadedly connected to the threaded hole 23, and a one-way valve 25 is provided at the end of the threaded tube 24 away from the flange 1; wherein a dustproof gasket 26 is provided at the end of the one-way valve 25 away from the threaded tube 24; and a blocking cover 27 is provided at the end of the dustproof gasket 26 away from the one-way valve 25.

[0048] During use, the threaded hole 23 provided on the surface of the flange 2 is used to install the grease injection structure, which is used to inject insulating grease into the gap between the flange 1 and the flange 2. When the one-way valve 25 is used to inject grease into the grease injection structure, the insulating grease can only enter the gap and cannot flow out from the threaded tube 24.

[0049] Figure 1 A schematic diagram of installing an insulating joint according to an embodiment of the present application is shown. Figure 2 A schematic diagram of flange installation according to an embodiment of the present application is shown. Figure 3 A schematic diagram of the insulating coating application position according to one embodiment of the present application is shown. Figure 4 Show Figure 3 Schematic diagram of the enlarged area A in the middle. Figure 5 A schematic diagram of installing an insulation board according to an embodiment of the present application is shown. Figure 6 A schematic diagram of a flange structure according to an embodiment of the present application is shown.

[0050] In some embodiments, an annular groove 11 is further provided with an annular rubber ring mounting groove 41 at one end close to the annular mounting groove 21; wherein the annular rubber ring mounting groove 41 is concentrically arranged with the flange 1; the annular rubber ring mounting groove 41 is connected with the annular mounting groove 21; a rubber sealing ring 42 is provided in the annular rubber ring mounting groove 41; wherein the inner wall of the rubber ring sealing ring is connected to the insulating plate 4, and one side of the outer wall is connected to one end of the insulating sleeve 3.

[0051] During use, the end of the annular rubber ring installation groove 41 close to the flange 2 is open, and the rubber sealing ring 42 can be installed from the outside of the flange 1.

[0052] While various embodiments of the present application have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

[0053] The terms used in this document are selected to best explain the principles of the embodiments, practical applications or technical improvements in the market, or to enable other ordinary technicians in this technical field to understand the embodiments disclosed in this document.

[0054] The above are merely optional embodiments of the present application and are not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. An insulating joint, characterized in that: include: Flange (1), with both ends connected to the delivery pipeline; as well as The flange (2) is sleeved on the outer wall of the flange (1); An insulating sleeve (3) is arranged between the inner wall of the flange (2) and the outer wall of the flange (1); An insulating plate (4) is arranged in the flange (1), and a circumferential outer wall of the insulating plate (4) passes through the inner wall of the flange (1) and is connected to one end of the insulating sleeve (3).

2. The insulating joint according to claim 1, characterized in that: The insulating plate (4) is an annular plate, and the inner diameters of the annular plate and the flange (1) are the same; The inner wall of the flange (1) is provided with an annular groove (11), and the annular groove (11) is arranged concentrically with the flange (1); wherein The annular groove (11) is centrally arranged along the axial direction of the inner wall of the flange (1); The insulating plate (4) is arranged in the annular groove (11).

3. The insulating joint according to claim 2, characterized in that: The outer wall of the flange (1) is provided with an annular mounting groove (21), and the annular mounting groove (21) is arranged concentrically with the flange (1); wherein The annular mounting groove (21) is used to mount the flange (2); wherein The annular mounting groove (21) is open near one end of the insulating sleeve (3); The insulating sleeve (3) is arranged between the annular mounting groove (21) and the flange (2).

4. The insulating joint according to claim 3, characterized in that: The inner wall of the annular mounting groove (21) is provided with an insulating coating (22).

5. The insulating joint according to claim 4, characterized in that: The surface of the flange (2) is provided with a threaded hole (23); wherein The threaded hole (23) passes through the flange (2) body, and one end of the threaded hole (23) is connected to the gap between the flange (2) and the flange (1); A threaded pipe (24) is provided in the threaded hole (23), the threaded pipe (24) is threadedly connected to the threaded hole (23), and a one-way valve (25) is provided at one end of the threaded pipe (24) away from the flange (1); wherein A dustproof gasket (26) is provided at one end of the one-way valve (25) away from the threaded pipe (24); One end of the dustproof gasket (26) away from the one-way valve (25) is provided with a blocking cover (27).

6. The insulating joint according to claim 5, characterized in that: An annular rubber ring installation groove (41) is further provided at one end of the annular groove (11) close to the annular installation groove (21); wherein The annular rubber ring mounting groove (41) is concentrically arranged with the flange (1); The annular rubber ring installation groove (41) is communicated with the annular installation groove (21); A rubber sealing ring (42) is provided in the annular rubber ring installation groove (41); wherein The inner wall of the rubber sealing ring (42) is connected to the insulating plate (4), and one side of the outer wall is connected to one end of the insulating sleeve (3).

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