Gas pipeline flange connection leakage detection device

Abstract

The present invention relates to a gas pipeline flange connection gas leakage detection device, comprising a detection module and a plugging module; the detection module comprises a sensor for detecting whether the flange interface is leaking; the plugging module comprises a quick-drying solution placed in a liquid storage box for plugging, a liquid extraction device for extracting the quick-drying solution, and a spraying member for spraying the quick-drying solution onto the flange interface; when the flange interface is detected to be leaking, a controller starts the plugging module to spray the quick-drying solution onto the flange interface. After detecting that a gas leak occurs at the flange interface of the gas pipeline, the detection device can take a temporary remedial measure of spraying the quick-drying solution to prevent the leakage from further deteriorating, reduce the risk of fire and explosion, and provide a safe working environment for maintenance personnel.

Description

Technical Field

[0001] The invention relates to the technical field of gas pipeline maintenance, and in particular to a gas pipeline flange connection gas leakage detection device. Background Art

[0002] At present, flange connection is a common connection method for gas pipeline projects. In actual use, flange connection often causes gas leakage due to objective and subjective factors such as aging of seals, loose bolts, thermal expansion and contraction. When the combustible gas in the air reaches a certain concentration, there will be a risk of fire and explosion. Therefore, it is necessary to perform daily inspections on flange connections during the operation of gas pipelines. At present, the most common detection method is manual inspection. Taking the natural gas pipeline inspection of a gas turbine power plant as an example, maintenance personnel need to carry the "Combustible Gas Detector 3110" many times a day and insert the probe of the detector into the seal around each flange connection for inspection. Not only is the efficiency low, but it cannot detect in real time, and cannot effectively reduce the risk of fire and explosion.

[0003] In order to solve the above problems, relevant technical personnel have developed relevant gas pipeline leakage detection devices. For example, the invention patent with authorization announcement number CN211146111U discloses a natural gas pipeline leakage detection device, including a first transmission pipeline, a second transmission pipeline and a connecting pipeline, the two ends of the connecting pipeline are sealed and connected to the first and second transmission pipelines through flanges, a valve is installed in the connecting pipeline, a rainproof sealing cover is provided on the outside of the connecting pipeline, a sealing semi-ring body is fixed on the inside of the rainproof sealing cover, and a sealing ring is installed on the inside of the sealing semi-ring body; the rainproof sealing cover is provided with a detection chamber protruding outward, and the sliding limit of the detection chamber is limited by a top plate, a coil spring is placed above the top plate, and a pressure sensor is provided inside the coil spring, and the pressure sensor is connected to a wireless alarm through a microprocessor, and the wireless alarm communicates wirelessly with the background terminal through a built-in wireless transceiver module. Although the detection device has the characteristics of low cost and easy maintenance, the detection device cannot take temporary remedial measures to prevent the leakage from further deteriorating when detecting a gas pipeline or flange leak, and cannot reduce the risk of fire and explosion, and cannot provide a safe environment for maintenance personnel to solve the problem. Summary of the invention

[0004] To this end, the technical problem to be solved by the present invention is to overcome the problem in the prior art that after a gas pipeline flange leak is detected, temporary remedial measures cannot be taken to provide a safe working space for maintenance personnel, thereby providing a gas pipeline flange connection leakage detection device, which can take temporary remedial measures after a gas pipeline flange interface leak is detected to prevent the leakage from further deteriorating, reduce the risk of fire and explosion, and provide a safe working environment for maintenance personnel.

[0005] In order to solve the above technical problems, the present invention provides a gas pipeline flange connection leakage detection device, including a detection module and a plugging module; the detection module includes a sensor for detecting whether the flange interface is leaking; the plugging module includes a quick-drying solution for plugging placed in a liquid storage box, a liquid extraction device for extracting the quick-drying solution, and a spraying member for spraying the quick-drying solution onto the flange interface; when a leak at the flange interface is detected, a controller starts the plugging module to spray the quick-drying solution onto the flange interface.

[0006] In one embodiment of the present invention, a sealing module is further included. The sealing module includes a first sealing member disposed between the first flange and the second flange for sealing the flange interface.

[0007] In one embodiment of the present invention, the first sealing member includes two air bags; after being inflated, the air bags come into contact with the inner wall of the first flange and the inner wall of the second flange.

[0008] In one embodiment of the present invention, the liquid pumping device includes a liquid outlet pipe, and the liquid outlet pipe extends to the outside of the flange interface through the gap between the two air bags.

[0009] In one embodiment of the present invention, the sensor extends through the gap between the two airbags to the outside of the flange interface.

[0010] In one embodiment of the present invention, the first sealing member is connected to an annular covering member, and the covering member includes a first assembled part and a second assembled part.

[0011] In one embodiment of the present invention, the first sealing member comprises two groups, the inner wall of the first assembled body is connected to one group of the first sealing members, and the inner wall of the second assembled body is connected to the other group of the first sealing members; an inflation device is provided on the first assembled body and / or the second assembled body, and the inflation device is used to inflate the airbag.

[0012] In one embodiment of the present invention, a shell is further included, and the shell is used to accommodate and fix the liquid storage box.

[0013] In one embodiment of the present invention, the plugging module further comprises a connecting piece connecting the liquid outlet pipe and the spraying piece, the connecting piece is arc-shaped, and the spraying pieces are arranged in a circular array on the connecting piece and aligned with the flange interface.

[0014] In one embodiment of the present invention, the detection module further includes a positioning member and a signal transmitting device, wherein the positioning member is used to locate the position of the flange interface; the signal transmitting device is electrically connected to the sensor and is used to output an alarm signal when air leakage is detected at the flange interface.

[0015] The above technical solution of the present invention has the following advantages compared with the prior art:

[0016] The gas pipeline flange connection gas leakage detection device described in the present invention comprises a detection module and a plugging module; the detection module comprises a sensor arranged around the flange interface for detecting whether there is a combustible gas leak; the plugging module comprises a quick-drying solution placed in a liquid storage box for plugging, a liquid extraction device for extracting the quick-drying solution, and a spraying member for spraying the quick-drying solution onto the flange interface; when a gas leak is detected at the flange interface, a controller activates the plugging module to spray the quick-drying solution onto the flange interface. After detecting a gas leak at the flange interface of the gas pipeline, the detection device can take a temporary remedial measure of spraying the quick-drying solution to prevent the gas leak from further deteriorating, reduce the risk of fire and explosion, and provide a safe working environment for maintenance personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments of the present invention in conjunction with the accompanying drawings, wherein

[0018] Figure 1 A cross-sectional view of a gas pipeline flange connection leakage detection device according to an embodiment of the present invention;

[0019] Figure 2 for Figure 1 A schematic diagram of a partial structure of the sealing module shown;

[0020] Figure 3 for Figure 1 The structural schematic diagram of the leak plugging module shown;

[0021] Figure 4 for Figure 1 Schematic diagram of the working status of the detection device shown.

[0022] Description of the reference numerals in the specification: 11, liquid storage box; 12, quick-drying solution; 13, liquid extraction device; 131, liquid outlet pipe; 14, connecting piece; 15, spraying piece; 16, closing cover;

[0023] 2. Sealing module; 21. Covering member; 211. First assembly part; 212. Second assembly part; 22. First sealing member; 23. Inflating device; 24. Second sealing member; 25. Position limiting member;

[0024] 3. Detection module; 31. Sensor; 32. Display; 33. Signal transmitting device; 34. Positioning member;

[0025] 4. Controller; 5. First flange; 6. Flange interface; 7. Housing. DETAILED DESCRIPTION

[0026] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0027] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which the invention belongs.

[0028] In the description of the present application, it should be understood that the terms "longitudinal", "lateral", "center", "length", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0029] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, or it can be directly connected to be integrated or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Reference Figures 1 to 4 As shown, an embodiment of the present invention provides a gas pipeline flange connection leakage detection device, including a detection module 3 and a plugging module; the detection module 3 includes a sensor 31 for detecting whether the flange interface 6 is leaking; the plugging module includes a quick-drying solution 12 for plugging placed in a liquid storage box 11, a liquid extraction device 13 for extracting the quick-drying solution 12, and a spraying member 15 for spraying the quick-drying solution 12 onto the flange interface 6; when a leak is detected at the flange interface 6, the controller 4 starts the plugging module to spray the quick-drying solution 12 onto the flange interface 6.

[0031] The gas pipeline flange connection leakage detection device described in this embodiment includes a detection module 3 and a plugging module; the detection module 3 includes a sensor 31 for detecting whether the flange interface 6 is leaking, and the sensor 31 is set as a combustible gas sensor. The combustible gas sensor is not only small in size, but also has excellent responsiveness, has a high sensitivity to hydrocarbon combustible gases, and can accurately detect the leakage of combustible gases; the plugging module includes a quick-drying solution 12 placed in a liquid storage box 11 for plugging, a pumping device 13 for extracting the quick-drying solution 12, and a spraying member 15 for spraying the quick-drying solution 12 to the flange interface 6. In this embodiment, the quick-drying solution 12 is preferably quick-drying glue, which has the advantages of fast bonding speed, good strength, and easy operation, and is suitable for temporary plugging of the flange interface 6; the pumping device 13 is set as a gear pump or a high-viscosity pump that can extract the quick-drying glue. When the flange interface 6 is detected to be leaking, the controller 4 starts the plugging module to spray the quick-drying solution 12 to the flange interface 6. After detecting a gas leak at the flange interface 6 of the gas pipeline, the detection device can take a temporary remedial measure of spraying the quick-drying solution 12 to prevent the gas leak from further deteriorating, reduce the risk of fire and explosion, and provide a safe working environment for maintenance personnel.

[0032] In addition, the detection device also includes a sealing module 2, which is used to seal the space between the first flange 5 and the second flange (not shown in the figure) to achieve sealing of the flange interface 6, so that the flange interface 6 is not in contact with the outside world, thereby providing a closed space and improving the accuracy of detection; the sealing module 2 includes a first sealing member 22 arranged between the first flange 5 and the second flange for sealing the flange interface 6.

[0033] Further, refer to Figure 1 As shown, since the space between the first flange 5 and the second flange is not enough to place the plugging module, the liquid storage box 11 and the quick-drying solution 12 are arranged outside the flange, and the liquid outlet pipe 131 of the liquid pumping device 13 is extended to between the first flange 5 and the second flange; therefore, the first sealing member 22 includes two air bags; the liquid pumping device 13 includes a liquid outlet pipe 131, and the liquid outlet pipe 131 extends to the outside of the flange interface 6 through the gap between the two air bags; after the air bags are inflated, they contact the inner wall of the first flange 5 and the inner wall of the second flange to seal the flange interface 6. In addition, the sensor 31 extends to the outside of the flange interface 6 through the gap between the two air bags and the gap between the first sealing member 22.

[0034] In addition, refer to Figure 1 , Figure 2 and Figure 4As shown, in order to achieve sealing between the two airbags, the first sealing member 22 is connected to the annular covering member 21. In order to better prevent the risks caused by static electricity, the material of the covering member 21 can be set to anti-static plexiglass, anti-static PVC, anti-static nylon, anti-static rubber and other materials; it can be imagined that in order to facilitate the installation of the covering member 21 and the first sealing member 22, the covering member 21 includes a semi-annular first assembling body 211 and a second assembling body 212, and a second sealing member 24 is provided between the first assembling body 211 and the second assembling body 212 to achieve sealing between the two assembling bodies, and the second sealing member 24 is preferably set to anti-static rubber.

[0035] Therefore, refer to Figure 1 , Figure 2 and Figure 4 As shown, the first seal 22 also includes two groups, the inner wall of the first assembling body 211 is connected to one group of the first seals 22, and the inner wall of the second assembling body 212 is connected to the other group of the first seals 22; in order to avoid the airbags included in the upper and lower groups of the first seals 22 from rubbing against each other during the inflation process and causing damage to the airbags, a limiter 25 is provided between the two groups of the first seals 22; in order to inflate the airbags included in the first seal 22, an inflation device 23 is provided on the first assembling body 211 and / or the second assembling body 212, and the inflation device 23 is used to inflate the airbags.

[0036] Furthermore, refer to Figure 1 and Figure 4 As shown, the first assembled body 211 is connected to a shell 7, and the shell 7 is used to accommodate and fix the liquid storage box 11. The liquid storage box 11 is connected to the liquid pumping device 13. The first assembled body 211 is provided with a through hole for passing the liquid outlet pipe 131. After passing through the through hole, the liquid outlet pipe 131 extends to the outside of the flange interface 6 through the gap between the two air bags on the first sealing member 22 connected to the first assembled body 211. In addition, the shell 7 is also provided with a closing cover 16 for sealing the liquid storage box 11 to prevent the quick-drying solution 12 from solidifying after contacting the air.

[0037] Furthermore, refer to Figure 1 and Figure 3 As shown, in order to achieve full coverage of the quick-drying solution 12 at the flange interface 6 after a leak is detected, the leak-proof module also includes a connector 14 connecting the liquid outlet pipe 131 and the spray piece 15, the connector 14 is arc-shaped, and a channel connecting the liquid outlet pipe 131 and the spray piece 15 is provided in the connector 14, and the spray piece 15 is arranged in a circular array on the connector 14 and aligned with the flange interface 6.

[0038] In addition, refer to Figure 1 and Figure 4 As shown, since the liquid outlet pipe 131 passes through the first assembly sub-body 211 and is connected to the arc-shaped connecting piece 14, in order to avoid interference between the sensor 31 included in the detection module 3 and the connecting piece 14, the sensor 31 is fixed on the second assembly sub-body 212, and points to the flange interface 6 through the gap between the two airbags included in the first sealing member 22 on the second assembly sub-body 212. In order to improve the detection accuracy, the sensor 31 can be set to be multiple and arranged in a circular array on the second assembly sub-body 212; the detection module 3 also includes a positioning member 34 and a signal transmitting device 33, the positioning member 34 is set to be a GPS locator, and the GPS locator is used to locate the position of the flange interface 6 so that the maintenance personnel can determine the leaking flange connection position in time; the signal transmitting device 33 is electrically connected to the sensor, and is used to output an alarm signal to alert the maintenance personnel when a leak in the flange interface 6 is detected; the detection module 3 also includes a display 32 that displays the concentration of the leaking gas so that the maintenance personnel can judge the degree of leakage.

[0039] It is conceivable that the detection device can be backward compatible with flange connections of different sizes. For example, a leakage detection device for a DN350 caliber flange connection is made. On the premise of ensuring that the first seal can seal the flange interface 6, the detection device can also be used for flanges with a nominal diameter less than 350 mm.

[0040] Obviously, the above embodiments are merely examples for clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the protection scope of the invention.

Claims

1. A gas pipeline flange connection leakage detection device, characterized in that: The invention comprises a detection module (3) and a leak-proof module (1); the detection module (3) comprises a sensor (31) for detecting whether a flange interface (6) is leaking; the leak-proof module (1) comprises a quick-drying solution (12) for leak-proofing placed in a liquid storage box (11), a liquid extraction device (13) for extracting the quick-drying solution (12), and a spraying member (15) for spraying the quick-drying solution (12) onto the flange interface (6); when a leak is detected at the flange interface (6), the controller (4) activates the leak-proof module (1) to spray the quick-drying solution (12) onto the flange interface (6); It also includes a sealing module (2), the sealing module (2) including a first sealing member (22) provided between the first flange (5) and the second flange for sealing the flange interface (6); The first sealing member (22) comprises two air bags; after the air bags are inflated, the air bags contact the inner wall of the first flange (5) and the inner wall of the second flange; The first sealing member (22) is connected to the annular covering member (21), and the covering member (21) comprises a first assembled part (211) and a second assembled part (212); The first sealing member (22) comprises two groups, the inner wall of the first assembling sub-body (211) is connected to one group of the first sealing members (22), and the inner wall of the second assembling sub-body (212) is connected to the other group of the first sealing members (22); an inflation device (23) is provided on the first assembling sub-body (211) or / and the second assembling sub-body (212), and the inflation device (23) is used to inflate the airbag; The plugging module (1) further comprises a connecting piece (14) connecting the liquid outlet pipe (131) and the spraying piece (15); the connecting piece (14) is arc-shaped; the spraying pieces (15) are arranged in a circular array on the connecting piece (14) and aligned with the flange interface (6).

2. A gas pipeline flange connection leakage detection device according to claim 1, characterized in that: The liquid extraction device (13) comprises a liquid outlet pipe (131), and the liquid outlet pipe (131) extends through the gap between the two air bags to the outside of the flange interface (6).

3. A gas pipeline flange connection leakage detection device according to claim 1, characterized in that: The sensor (31) extends through the gap between the two airbags to the outside of the flange interface (6).

4. A gas pipeline flange connection leakage detection device according to claim 1, characterized in that: It also comprises a shell (7), wherein the shell (7) is used to accommodate and fix the liquid storage box (11).

5. A gas pipeline flange connection leakage detection device according to claim 1, characterized in that: The detection module (3) further comprises a positioning member (34) and a signal transmitting device (33), wherein the positioning member (34) is used to locate the position of the flange interface (6); and the signal transmitting device (33) is electrically connected to the sensor (31) and is used to output an alarm signal when air leakage of the flange interface (6) is detected.

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