Device for corrosion prevention and leakage detection of oil and gas pipeline flange

Abstract

The utility model provides a device for oil and gas pipeline flange corrosion prevention and leakage detection, which comprises a fixing ring corresponding to an oil and gas pipeline and a magnetic suction strip corresponding to the flange, the periphery of the flange is provided with a magnetic suction ring, the magnetic suction ring corresponds to the magnetic suction strip, the magnetic suction strip is fixedly provided with corrosion prevention cloth, and elastic cloth is arranged between the corrosion prevention cloth and the fixing ring. A detection plate is arranged in the anti-corrosion cloth, and the side, close to the flange, of the detection plate is coated with a natural gas tracer agent. According to the utility model, the magnetic suction ring is arranged on the peripheral side of the flange, and the anti-corrosion cloth is arranged on the magnetic suction strip, so that the anti-corrosion cloth can be mounted through the adsorption and fixation of the magnetic suction strip and the magnetic suction ring, and therefore, the anti-corrosion cloth can be conveniently mounted and dismounted, and a better anti-corrosion effect can be achieved; the side, close to the flange, of the detection plate is coated with a natural gas tracer, and whether natural gas leaks or not can be detected through the detection plate, so that anti-corrosion cloth does not need to be disassembled, and detection efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of flange anti-corrosion devices, in particular to a device for anti-corrosion and leakage detection of flanges of oil and gas pipelines. Background Art

[0002] Flange connection is a type of natural gas pipeline connection, but the two flanges are usually fixed by bolts. Since it is not a welding connection, if the bolts are not tightened, natural gas leakage is likely to occur under pressure. In addition, since the outdoor pipeline flange connection is exposed to a humid environment, the flange connection is prone to corrosion, resulting in a reduction in the pressure-bearing capacity of the pipeline flange, affecting pipeline safety.

[0003] In order to prevent flange corrosion, anti-corrosion tape is usually wrapped around the flange for sealing. Although this can solve the problem of outdoor corrosion protection, in order to prevent natural gas leakage, the flange gap needs to be inspected regularly. Therefore, the anti-corrosion tape needs to be removed, which makes leak detection more difficult. In addition, the anti-corrosion tape needs to be rewound after removal, which reduces the efficiency of detection.

[0004] To this end, the utility model provides a device for corrosion protection and leakage detection of oil and gas pipeline flanges. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a device for corrosion protection and leakage detection of oil and gas pipeline flanges to solve the problems raised in the above-mentioned background technology. The utility model is convenient for the installation and disassembly of the anti-corrosion cloth and can play a good anti-corrosion role; it can also detect whether natural gas is leaking through the detection plate, thereby eliminating the need to remove the anti-corrosion cloth and improving the detection efficiency.

[0006] In order to achieve the above-mentioned purpose, the utility model is realized through the following technical scheme: a device for anti-corrosion and leakage detection of oil and gas pipeline flanges, including a fixing ring corresponding to the oil and gas pipeline and a magnetic strip corresponding to the flange, a magnetic ring is installed on the peripheral side of the flange, the magnetic ring corresponds to the magnetic strip, an anti-corrosion cloth is fixed on the magnetic strip, an elastic cloth is installed between the anti-corrosion cloth and the fixing ring, a detection plate is installed in the anti-corrosion cloth, and a natural gas tracer is coated on the side of the detection plate close to the flange.

[0007] Furthermore, the magnetic strip includes a first magnetic portion and two second magnetic portions, the two second magnetic portions are respectively located at two ends of the first magnetic portion, the first magnetic portion corresponds to the magnetic ring, and the two second magnetic portions correspond to each other.

[0008] Furthermore, the elastic cloth is fixedly connected to the anti-corrosion cloth and the fixing ring, and a drawstring is installed in the fixing ring.

[0009] Furthermore, an air suction port is provided on one side of the elastic cloth, and a blocking block is installed in the air suction port.

[0010] Furthermore, a plurality of bolts are installed between the two flanges, and the elastic cloth is in contact with the bolts.

[0011] Furthermore, the anti-corrosion cloth and the magnetic strip are both provided with grooves in the middle, the two grooves are connected, the magnetic strip forms an annular structure, and the grooves are connected to the opposite inner side of the annular structure.

[0012] Furthermore, the detection plate is located in the groove, and a sealing ring is fixed on the peripheral side of the detection plate.

[0013] Furthermore, a pull block is fixed on the detection plate, and the detection plate is made of acrylic material.

[0014] Beneficial effects of the utility model: The utility model is a device for anti-corrosion and leakage detection of oil and gas pipeline flanges, comprising a flange; a magnetic attraction ring; an anti-corrosion cloth; a detection plate; and a natural gas tracer.

[0015] A magnetic ring is installed on the peripheral side of the flange, and an anti-corrosion cloth is installed on the magnetic strip. The anti-corrosion cloth can be installed by adsorbing and fixing the magnetic strip and the magnetic ring, which facilitates the installation and removal of the anti-corrosion cloth and has a good anti-corrosion effect. A detection plate is installed in the anti-corrosion cloth, and a natural gas tracer is applied on the side of the detection plate close to the flange. The detection plate can be used to detect whether natural gas is leaking, thereby eliminating the need to remove the anti-corrosion cloth and improving detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall assembly three-dimensional structure of a device for anti-corrosion and leakage detection of oil and gas pipeline flanges according to the utility model;

[0017] Figure 2 This is a schematic diagram of the assembled three-dimensional structure of the flange and the anti-corrosion cloth in a device for anti-corrosion and leakage detection of oil and gas pipeline flanges according to the utility model;

[0018] Figure 3 This is a schematic diagram of the assembly structure of a flange, an anti-corrosion cloth, and a magnetic strip in a device for anti-corrosion and leakage detection of an oil and gas pipeline flange according to the utility model;

[0019] Figure 4 This is an exploded view of a device for anti-corrosion and leakage detection of oil and gas pipeline flanges according to the utility model;

[0020] Figure 5 This is a schematic diagram of the assembly cross-sectional structure of the anti-corrosion cloth and the magnetic strip in a device for anti-corrosion and leakage detection of oil and gas pipeline flanges according to the utility model;

[0021] In the figure: 1. oil and gas pipeline; 2. flange; 3. bolt; 4. magnetic ring; 5. magnetic strip; 501. first magnetic part; 502. second magnetic part; 6. anti-corrosion cloth; 7. groove; 8. sealing ring; 9. detection plate; 10. pull block; 11. elastic cloth; 12. fixing ring; 13. drawstring; 14. air exhaust port. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] See also Figures 1 to 5 The utility model provides a technical solution: a device for anti-corrosion and leakage detection of oil and gas pipeline flanges, comprising a fixing ring 12 corresponding to the oil and gas pipeline 1 and a magnetic strip 5 corresponding to the flange 2, a magnetic ring 4 is installed on the peripheral side of the flange 2, the magnetic ring 4 corresponds to the magnetic strip 5, an anti-corrosion cloth 6 is fixed on the magnetic strip 5, an elastic cloth 11 is installed between the anti-corrosion cloth 6 and the fixing ring 12, a detection plate 9 is installed in the anti-corrosion cloth 6, and a natural gas tracer is applied on the side of the detection plate 9 close to the flange 2.

[0024] In this embodiment, the magnetic strip 5 includes a first magnetic portion 501 and two second magnetic portions 502 . The two second magnetic portions 502 are respectively located at two ends of the first magnetic portion 501 . The first magnetic portion 501 corresponds to the magnetic ring 4 , and the two second magnetic portions 502 correspond to each other.

[0025] Specifically, when installing the anti-corrosion cloth 6, the magnetic strip 5 is wrapped around the circumference of the flange 2, so that the first magnetic portion 501 on the magnetic strip 5 is adsorbed with the magnetic ring 4 on the flange 2, so that the magnetic strip 5 can be fixed on the flange 2, and then the two second magnetic portions 502 are adsorbed and fixed, so that the magnetic strip 5 forms a ring structure, and is installed together with the flange 2 to prevent humid air from directly contacting the flange 2.

[0026] The elastic cloth 11 is fixedly connected to the anti-corrosion cloth 6 and the fixing ring 12. A drawstring 13 is installed in the fixing ring 12. An air suction port 14 is opened on one side of the elastic cloth 11. A blocking block is installed in the air suction port 14. Multiple bolts 3 are installed between the two flanges 2, and the elastic cloth 11 is in contact with the bolts 3.

[0027] Specifically, the fixing ring 12 is wrapped around the oil and gas pipeline 1, and the drawstring 13 is pulled to shrink the fixing ring 12, so that the device can be fixed to the oil and gas pipeline 1. At this time, the anti-corrosion cloth 6, the elastic cloth 11 and the fixing ring 12 can completely seal the connection between the flange 2, and then the internal air is extracted through the exhaust port 14, so that the elastic cloth 11 fits the flange 2 and the bolt 3, which can achieve a better anti-corrosion effect.

[0028] A groove 7 is provided in the middle of the anti-corrosion cloth 6 and the magnetic strip 5. The two grooves 7 are connected. The magnetic strip 5 forms an annular structure. The groove 7 is connected to the inner side of the annular structure. The detection plate 9 is located in the groove 7. A sealing ring 8 is fixed on the peripheral side of the detection plate 9. A pull block 10 is fixed on the detection plate 9. The detection plate 9 is made of acrylic material.

[0029] Specifically, when a gas leak occurs, the natural gas tracer on the detection plate 9 contacts the natural gas, causing the natural gas tracer to change color. The transparent detection plate 9 can better display the color change, thereby intuitively detecting whether there is a gas leak.

[0030] The detection plate 9 is fixed in the groove 7 by the sealing ring 8, and the detection plate 9 can be pulled out by directly pulling the pull block 10, so that the detection plate 9 can be replaced conveniently and the natural gas tracer can be replenished conveniently.

[0031] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A device for corrosion protection and leakage detection of oil and gas pipeline flanges, comprising a fixing ring (12) corresponding to the oil and gas pipeline (1) and a magnetic strip (5) corresponding to the flange (2), characterized in that: A magnetic ring (4) is installed on the peripheral side of the flange (2), the magnetic ring (4) corresponds to the magnetic strip (5), an anti-corrosion cloth (6) is fixed on the magnetic strip (5), an elastic cloth (11) is installed between the anti-corrosion cloth (6) and the fixing ring (12), a detection plate (9) is installed in the anti-corrosion cloth (6), and a natural gas tracer is applied on the side of the detection plate (9) close to the flange (2).

2. The device for anti-corrosion and leakage detection of oil and gas pipeline flanges according to claim 1 is characterized in that: The magnetic strip (5) comprises a first magnetic portion (501) and two second magnetic portions (502), wherein the two second magnetic portions (502) are respectively located at two ends of the first magnetic portion (501), the first magnetic portion (501) corresponds to the magnetic ring (4), and the two second magnetic portions (502) correspond to each other.

3. The device for anti-corrosion and leakage detection of oil and gas pipeline flanges according to claim 1 is characterized in that: The elastic cloth (11) is fixedly connected to the anti-corrosion cloth (6) and the fixing ring (12), and a drawstring (13) is arranged inside the fixing ring (12).

4. The device for anti-corrosion and leakage detection of oil and gas pipeline flanges according to claim 1 is characterized in that: An air suction port (14) is provided on one side of the elastic cloth (11), and a blocking block is installed in the air suction port (14).

5. The device for anti-corrosion and leakage detection of oil and gas pipeline flanges according to claim 1 is characterized in that: A plurality of bolts (3) are installed between the two flanges (2), and the elastic cloth (11) is in contact with the bolts (3).

6. The device for anti-corrosion and leakage detection of oil and gas pipeline flanges according to claim 1 is characterized in that: The anti-corrosion cloth (6) and the magnetic strip (5) are both provided with a groove (7) in the middle, the two grooves (7) are connected, the magnetic strip (5) forms an annular structure, and the groove (7) is connected to the inner side of the annular structure.

7. The device for anti-corrosion and leakage detection of oil and gas pipeline flanges according to claim 6 is characterized in that: The detection plate (9) is located in the groove (7), and a sealing ring (8) is fixed on the peripheral side of the detection plate (9).

8. The device for anti-corrosion and leakage detection of oil and gas pipeline flanges according to claim 1 is characterized in that: A pull block (10) is fixed on the detection plate (9), and the detection plate (9) is made of acrylic material.

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