Leaking stoppage device

Abstract

The utility model belongs to the technical field of oil and gas pipelines, and discloses a leaking stoppage device. The leaking stoppage device comprises an isolation piece and a sealing piece, the opening end of the isolation piece can be fixed to the piece to be plugged, the sealing piece is movably arranged on the cavity wall of the isolation cavity, the opening end of the sealing piece can abut against the piece to be plugged so as to cover the notch of the piece to be plugged, a threaded rod is rotationally arranged at the closed end of the sealing piece, and a threaded hole is formed in the cavity bottom of the isolation cavity in a penetrating mode. The threaded rod is matched with the threaded hole, and the threaded rod rotates to enable the opening end of the sealing piece to move in the direction close to the to-be-plugged piece so as to press and abut against the to-be-plugged piece. When the threaded rod rotates, the opening end of the sealing piece can move towards the piece to be plugged, so that the opening end of the sealing piece forms a certain abutting moment to the piece to be plugged, the abutting force to the piece to be plugged is increased, the reliability of the plugging device is enhanced, and meanwhile the safety of the plugging device is improved.

Description

Technical Field

[0001] This utility model relates to the field of oil and gas pipeline technology, and in particular to a leak-sealing device. Background Technology

[0002] With the increasing development of oil and gas pipeline construction in my country, emergency pipeline repair work is becoming more and more important. If a pipeline leaks and is not repaired and sealed in time, it will cause national property losses and environmental pollution, and may also cause explosions or even fires.

[0003] Current technologies typically employ leak-sealing devices to plug leaks in pipelines, which are then welded to the pipes. However, existing leak-sealing devices cannot themselves release oil and gas, potentially leaving some oil and gas inside. During welding, the welding torch can easily ignite this internal oil and gas, leading to a safety accident. Furthermore, existing leak-sealing devices have relatively weak sealing strength, making them prone to secondary leaks of oil and gas. Therefore, there is an urgent need to develop a leak-sealing device to address these issues. Utility Model Content

[0004] The purpose of this invention is to provide a leak-sealing device to solve the problem of poor safety and reliability of existing leak-sealing devices, thereby improving the safety and reliability of the leak-sealing device.

[0005] Based on the above concept, the technical solution adopted by this utility model is as follows:

[0006] A leak-sealing device includes an isolating member having an isolation cavity with one open end and the other closed end. The open end of the isolating member can be fixed to a part to be sealed. The device further includes a sealing member movably disposed within the isolation cavity. The sealing member has a sealing cavity with one open end and the other closed end. The open end of the sealing member can abut against the part to be sealed to block any gaps in the part. The closed end of the sealing member is rotatably provided with a threaded rod. The closed end of the isolating member has a through threaded hole. The threaded rod engages with the threaded hole. Rotation of the threaded rod causes the open end of the sealing member to move closer to the part to be sealed, pressing against the part to be sealed.

[0007] Optionally, the cavity wall of the isolation chamber is provided with a slide rail along the extension direction of the threaded rod, and the sealing element is provided with a sliding element that cooperates with the slide rail.

[0008] Optionally, the sliding member is disposed at the closed end of the seal.

[0009] Optionally, the leak-sealing device further includes at least two openable or closable conductive components, at least one of which has an outlet connected to a sealing cavity and an inlet connected to an inert gas source outside the isolation element, and at least one of which has an inlet connected to the sealing cavity and an outlet connected to a leak recovery device outside the isolation element.

[0010] Optionally, each of the conductive components includes a conductive element and a flexible tube connected together, and the closed end of the isolation element is provided with a plurality of mounting holes, and the conductive element is installed in the mounting holes one by one;

[0011] At least one of the conductive elements has an inlet for communication with the inert gas source and an outlet for communication with the sealing cavity via the flexible tube;

[0012] At least one of the conductive elements has an inlet connected to the sealed cavity via the flexible tube, and an outlet connected to the leak recovery device.

[0013] Optionally, the closed end of the seal is provided with at least two through holes, each through hole corresponding to one of the flexible tubes. The through holes connected to the inert gas source and the through holes connected to the leakage recovery device are respectively located on opposite sides of the threaded rod.

[0014] Optionally, the conduction assembly further includes a switching valve, wherein a switching valve is provided between the inlet of the conduction component and the inert gas source, and a switching valve is also provided between the outlet of the conduction component and the leakage recovery device.

[0015] Optionally, the side wall of the isolation cavity is provided with a detection hole for a testing instrument to be inserted into the isolation cavity. The leak-sealing device also includes a sealing cover that can be placed over the detection hole.

[0016] Optionally, the detection hole is located on the side wall of the isolation cavity away from the closed end of the isolation element.

[0017] Optionally, the sealing device includes a rolling bearing, the outer ring of which is mounted on the closed end of the seal, and the inner ring of which is coaxially connected to the threaded rod.

[0018] Alternatively, the inner ring of the rolling bearing is installed at the closed end of the seal, the threaded rod is a hollow structure, and the outer ring of the rolling bearing is coaxially connected to the outer peripheral wall of the threaded rod.

[0019] The beneficial effects of this utility model are:

[0020] This invention proposes a leak-sealing device that initially seals the gap in the part to be sealed by abutting the open end of a sealing element against it. Furthermore, a threaded rod is rotatably mounted on the closed end of the sealing element, and a threaded hole is formed on the closed end of an isolator. The threaded rod and the threaded hole cooperate, allowing the sealing element to move closer to the part to be sealed when the threaded rod rotates, thus preventing leakage into the isolation cavity. Welding the isolator to the part to be sealed also minimizes the risk of fire or explosion, ensuring high safety. Moreover, because the open end of the isolator is fixed to the part to be sealed, the rotation of the threaded rod creates a certain contact torque between the open end of the sealing element and the part to be sealed, increasing the contact force and sealing the gap more tightly, further preventing leakage and enhancing the reliability of the leak-sealing device. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of a leak-sealing device provided in an embodiment of this utility model;

[0023] Figure 2 This is a partial structural schematic diagram from another perspective of a leak-sealing device provided in an embodiment of this utility model;

[0024] Figure 3 This is a structural cross-sectional view of the isolation component provided in this embodiment of the utility model;

[0025] Figure 4 This is a structural schematic diagram of the isolation component provided in another embodiment of the present utility model;

[0026] Figure 5 This is a structural cross-sectional view of the sealing element provided in this embodiment of the utility model;

[0027] Figure 6 This is a top view of the sealing element provided in this embodiment of the utility model;

[0028] Figure 7 This is a schematic diagram of the structure of the threaded rod, the isolation component, and the sealing component provided in this embodiment of the utility model;

[0029] Figure 8 This is a schematic diagram of the structure of the top cover provided in an embodiment of this utility model.

[0030] In the picture:

[0031] 100. Component to be sealed; 200. Fixing rope; 300. Rope tensioner;

[0032] 1. Isolation component; 11. Isolation cavity; 12. Threaded hole; 13. Slide rail; 14. Mounting hole; 15. Inspection hole; 16. Fixing lug;

[0033] 2. Sealing element; 21. Sealing cavity; 22. Sliding element; 23. Connecting hole; 24. Mounting groove;

[0034] 3. Threaded rod;

[0035] 4. Conducting assembly; 41. Conducting element; 42. Flexible tube; 43. Switch valve;

[0036] 5. Pressure testing components;

[0037] 6. Rolling bearings;

[0038] 7. Bearing cover;

[0039] 8. Bearing housing;

[0040] 9. Top cover;

[0041] 10. Sealing cap. Detailed Implementation

[0042] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.

[0043] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0044] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0045] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. In the description of this embodiment, unless otherwise specified, "multiple" specifically refers to two or more.

[0046] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0047] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or it can be located in between the component.

[0048] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0049] This embodiment proposes a leak-sealing device to address the problem of poor safety and reliability in existing leak-sealing devices, thereby improving their safety and reliability. In this embodiment, the leak-sealing device targets an oil and gas pipeline.

[0050] like Figures 1 to 2 As shown, the leak-sealing device includes an isolating element 1, which has an isolation cavity 11 and is open at one end and closed at the other end. The open end of the isolating element 1 can be fixed to the part 100 to be sealed. The leak-sealing device also includes a sealing element 2, which is movably disposed in the isolation cavity 11. The sealing element 2 has a sealing cavity 21 and is open at one end and closed at the other end. The open end of the sealing element 2 can abut against the part 100 to seal the gap of the part 100 to be sealed. The closed end of the sealing element 2 is rotatably provided with a threaded rod 3. The closed end of the isolating element 1 is provided with a threaded hole 12. The threaded rod 3 cooperates with the threaded hole 12. The rotation of the threaded rod 3 can cause the open end of the sealing element 2 to move towards the part 100 to be sealed so as to press against the part 100 to be sealed.

[0051] Understandably, a threaded rod 3 is rotatably provided at the closed end of the seal 2, and a threaded hole 12 that mates with the threaded rod 3 is opened at the closed end of the isolation member 1. When the threaded rod 3 rotates, the seal 2 can move closer to or away from the bottom of the isolation chamber 11, that is, it can move away from or closer to the gap in the oil and gas pipeline. In use, screwing the threaded rod 3 causes the open end of the seal 2 to extend out of the isolation chamber 11, bringing the open end of the seal 2 against the oil and gas pipeline to cover the gap in the pipeline, thus initially sealing the gap. Then, screwing the threaded rod 3 in reverse moves the open end of the isolation element 1 towards the oil and gas pipeline until it abuts against the pipeline, fixing the open end of the isolation element 1 to the pipeline. Rotating the threaded rod 3 again moves the open end of the seal 2 away from the closed end of the isolation element 1, i.e., towards the oil and gas pipeline, until it abuts against the pipeline. At this point, leaking oil and gas from the gap in the pipeline cannot leak into the isolation chamber 11. Welding the isolation element 1 to the oil and gas pipeline reduces the risk of fire or explosion, ensuring high safety. Furthermore, since the isolation element 1 is now fixed to the oil and gas pipeline, continuing to rotate the threaded rod 3 creates a certain contact torque between the open end of the seal 2 and the pipeline, increasing the contact force and sealing the gap more tightly, further preventing oil and gas leakage and enhancing the reliability of the sealing device.

[0052] Optionally, the leak-sealing device further includes at least two openable or closable conductive components 4. The outlet of at least one conductive component 4 is connected to the sealing cavity 21, and the inlet is used to connect to an inert gas source outside the isolation element 1. The inlet of at least one conductive component 4 is connected to the sealing cavity 21, and the outlet is used to connect to a leak recovery device outside the isolation element 1. In this embodiment, the leak recovery device is an oil tank.

[0053] Understandably, the inert gas source can introduce inert gas into the sealing cavity 21 through the inlet of the connecting component 4, forcing the oil and gas in the sealing cavity 21 to be discharged into the oil tank through the outlet of the connecting component 4, thereby gradually emptying the oil and gas in the sealing cavity 21. Then, the connecting component 4 connected to the oil tank is closed while the inert gas source is continuously opened to maintain a certain pressure of the inert gas in the sealing cavity 21, preventing oil and gas from entering the sealing cavity 21. At this time, the isolating component 1 can be welded to the oil and gas pipeline. After welding, the connecting component 4 connected to the inert gas source is closed, and the inert gas source is removed to complete the sealing. Since the oil and gas in the sealing cavity 21 are basically emptied during welding, and the welding flame source and the sealing cavity 21 are separated by the isolating cavity 11, it is difficult to ignite the oil and gas, resulting in a high safety factor and greatly improving the safety of the leak sealing device.

[0054] Optionally, the isolation element 1 has two fixing ears 16 arranged opposite each other on its outer periphery. The leak-sealing device also includes a fixing rope 200 and a rope tightener 300 connected to each other. One end of the rope tightener 300 is connected to one fixing ear 16 via the fixing rope 200, and the other end of the rope tightener 300 is connected to the other fixing ear 16 via the fixing rope 200. By pulling the rope tightener 300, the fixing rope 200 can be continuously tightened, fixing the isolation element 1 to the oil and gas pipeline. The fixing method is simple and reliable, thereby improving the reliability of the leak-sealing device.

[0055] For example, the rope tensioner 300 is a hand-operated chain hoist. The hand-operated chain hoist is simple to operate and easy to carry, improving the efficiency of securing the isolator 1 to the oil and gas pipeline. Of course, other existing components can also be used for the rope tensioner 300, such as an electric hoist or a turnbuckle tightener, etc., without further restrictions.

[0056] In another embodiment, two fixing plates are provided on the outer periphery of the isolation member 1. The fixing plates have first threaded fastening holes. The leak-sealing device also includes a connector adapted to the shape of the oil and gas pipeline. Two second threaded fastening holes are provided at both ends of the connector. The first and second threaded fastening holes correspond one-to-one and are connected by bolts. This arrangement fixes the isolation member 1 to the oil and gas pipeline via the connector, greatly improving the strength of the isolation member 1 in fixing to the oil and gas pipeline, thereby enhancing the reliability of the leak-sealing device.

[0057] For example, nitrogen is used as the inert gas. Nitrogen does not react with oil or gas and is relatively inexpensive, thus improving the reliability and economy of the sealing process. Of course, other types of inert gases can be used in other embodiments, as long as they do not react with oil or gas; no further restrictions are imposed here.

[0058] like Figure 1 and Figure 3 As shown, optionally, each conductive assembly 4 includes a conductive element 41 and a flexible tube 42 connected to each other. The closed end of the isolation element 1 is provided with a plurality of mounting holes 14, and the conductive elements 41 are installed in the mounting holes 14 one by one. The inlet of at least one conductive element 41 is used to communicate with an inert gas source, and the outlet is used to communicate with the sealing cavity 21 through the flexible tube 42. The inlet of at least one conductive element 41 is used to communicate with the sealing cavity 21 through the flexible tube 42, and the outlet is used to communicate with the oil tank.

[0059] Understandably, the mounting hole 14 is located at the closed end of the isolator 1, away from the open end of the isolator 1, which facilitates connecting the conductor 41 to an inert gas source or to an oil tank, thus improving the ease of use of the leak-sealing device. Furthermore, since the seal 2 moves within the isolation chamber 11, the flexible tube 42 ensures smooth movement of the seal 2 without obstruction, and its resistance to breakage enhances the reliability of the leak-sealing device.

[0060] For example, the flexible tube 42 is a high-pressure rubber hose. High-pressure rubber hoses are less expensive and more reliable, improving the reliability and economy of the leak-sealing device. In other embodiments, the flexible tube 42 can also be made of materials such as polytetrafluoroethylene, as long as it can meet the requirements of good flexibility and high pressure resistance; no further restrictions are imposed here.

[0061] In this embodiment, two connecting components 4 are provided, namely, two connecting elements 41 and two flexible tubes 42. The inlet of one connecting element 41 is used to connect with the inert gas source, and the outlet is connected to the sealing cavity 21 through the flexible tube 42; the inlet of the other connecting element 41 is connected to the sealing cavity 21 through the flexible tube 42, and the outlet is used to connect with the oil tank. Of course, in other embodiments, the number of connecting components 4 can be increased as needed, as long as it is ensured that the inlet of one or some of the connecting elements 41 is connected to the inert gas source, and the outlet of another or some of the connecting elements 41 is connected to the oil tank. No further restrictions are imposed here.

[0062] like Figure 5 and Figure 6 As shown, to improve the replacement effect of inert gas on oil and gas, optionally, the closed end of the seal 2 is provided with at least two through holes 23. Each through hole 23 is connected to a corresponding flexible tube 42. The through hole 23 connected to the inert gas source and the through hole 23 connected to the leakage recovery device are respectively located on opposite sides of the threaded rod 3. This arrangement utilizes the through holes 23 to connect the flexible tube 42 and the sealing cavity 21, improving the structural rationality of the leak-sealing device. Furthermore, this arrangement avoids the two through holes 23 being adjacent, thus preventing the inert gas from being discharged immediately after being injected into the sealing cavity 21, thereby improving the replacement efficiency and intensity of the inert gas on the oil and gas in the sealing cavity 21.

[0063] It is conceivable that the connection between the connecting hole 23 and the flexible tube 42 is a sealed connection. Existing sealing joints can be installed on the hole wall of the connecting hole 23, and the flexible tube 42 can be connected to the sealing joint. No further restrictions are imposed here.

[0064] Continue to refer to Figure 1 Optionally, the connecting component 4 also includes a switching valve 43. A switching valve 43 is installed between the inlet of the connecting element 41 and the inert gas source, and another switching valve 43 is installed between the outlet of the connecting element 41 and the oil tank. By installing the switching valve 43, the connection of the connecting element 41 can be cut off at any time, thereby maintaining the gas pressure in the sealed cavity 21 and avoiding waste of inert gas while ensuring no oil or gas leakage. That is, after the oil and gas replacement is completed, the switching valve 43 between the outlet of the connecting element 41 and the oil tank can be closed, while the switching valve 43 between the inlet of the connecting element 41 and the inert gas source remains open to maintain the gas pressure in the sealed cavity 21 until welding is completed, at which point the switching valve 43 between the inlet of the connecting element 41 and the inert gas source is closed.

[0065] For example, the conductor 41 is a one-way valve. One-way valves offer high reliability and versatility, facilitating easy replacement and maintenance, thus improving user satisfaction with the leak-sealing device. In other embodiments, the conductor 41 can also be a two-way valve or other similar component, as long as it meets the requirements of airtightness and high reliability; no further restrictions are imposed here.

[0066] Optionally, a pressure detection element 5 is provided between the inlet of a conductive component 4 and the inert gas source to detect the gas pressure in the sealing cavity 21. This setting facilitates timely detection of the gas pressure inside the sealing cavity 21, thereby adjusting the inert gas inlet pressure as needed. This avoids excessive oil and gas discharge and prevents waste of inert gas, thus improving the reliability and economy of the leak-sealing device.

[0067] like Figures 1 to 4 As shown, to improve the smoothness of movement of the seal 2, optionally, a slide rail 13 is provided on the cavity wall of the isolation chamber 11 along the extension direction of the threaded rod 3, and a sliding member 22 is provided on the seal 2, which cooperates with the slide rail 13. This arrangement, through the sliding cooperation between the sliding member 22 and the slide rail 13, makes it less likely for the seal 2 to jam when moving, thereby improving the smoothness of movement of the seal 2.

[0068] For example, two sliding members 22 are provided and are positioned opposite each other on both sides of the seal 2, and two slide rails 13 are also provided, corresponding one-to-one with the sliding members 22. This arrangement can further improve the smoothness of movement of the seal 2 and ensure that both sides of the seal 2 remain balanced, further eliminating jamming and improving user satisfaction with the leak-sealing device.

[0069] Of course, the number of sliding parts 22 and slide rails 13 can be set as needed, as long as it can improve the movement stability and smoothness of the seal 2, without too many restrictions.

[0070] Optionally, the sliding member 22 is disposed at the closed end of the seal 2. The sliding member 22 being located at the closed end of the seal 2 allows the length of the slide rail 13 to be set shorter so that the open end of the seal 2 can abut against the oil and gas pipeline, saving the material used to manufacture the slide rail 13 and reducing the weight of the leak-sealing device, further improving the portability of the leak-sealing device.

[0071] For example, the slider 22 is rod-shaped, and the slide rail 13 is formed by two plate-shaped members. The rod-shaped slider 22 is slidably disposed in the groove between the two plate-shaped members. This arrangement can save on the manufacturing cost of the slider 22 and the slide rail 13, and can reduce the overall weight of the leak-sealing device, thereby improving the economy and portability of the leak-sealing device.

[0072] like Figure 3 , Figure 4 and Figure 7As shown, in order to improve the smoothness of rotation of the threaded rod 3 and reduce rotational resistance, the sealing device may optionally include a rolling bearing 6, the outer ring of the rolling bearing 6 being installed on the closed end of the seal 2, and the inner ring of the rolling bearing 6 being coaxially connected to the threaded rod 3; or, the inner ring of the rolling bearing 6 being installed on the closed end of the seal 2, the threaded rod 3 having a hollow structure, and the outer ring of the rolling bearing 6 being coaxially connected to the outer peripheral wall of the threaded rod 3.

[0073] For example, the sealing element 2 has a mounting groove 24 at its closed end, the outer ring of the rolling bearing 6 is mounted on the groove wall of the mounting groove 24, and the inner ring of the rolling bearing 6 is connected to the threaded rod 3. This arrangement can ensure the flatness of the closed end of the sealing element 2, save space in the isolation cavity 11, and thus improve the structural rationality of the leak-sealing device.

[0074] For example, the sealing device also includes a bearing housing 8, which covers the rolling bearing 6. The bearing housing 8 has a first through hole through which the threaded rod 3 can pass. This arrangement can ensure the rotational stability of the threaded rod 3 and prevent the threaded rod 3 from disconnecting from the rolling bearing 6 due to uneven force.

[0075] For example, the leak-sealing device also includes a bearing cover 7, which covers the bearing seat 8. The bearing cover 7 has a second through hole through which the threaded rod 3 can pass. This arrangement can prevent dust from falling into the rolling bearing 6 and causing the rolling bearing 6 to seize, thereby improving the reliability of the leak-sealing device.

[0076] Optionally, a gripping element is coaxially provided at the end of the threaded rod 3 away from the seal 2. The radial dimension of the gripping element is larger than the radial dimension of the threaded rod 3. This arrangement makes it easier for workers to tighten the threaded rod 3, thereby improving the usability of the seal 2 and increasing user satisfaction with the leak-sealing device.

[0077] For example, the grip is disc-shaped. This design further enhances the effort required to grip the device, thereby increasing user satisfaction with the leak-sealing device.

[0078] like Figure 1 , Figure 2 and Figure 6As shown, to further enhance welding safety, optionally, a detection hole 15 is provided through the side wall of the isolation chamber 11. The detection hole 15 is used for an oil and gas detection instrument to probe into the isolation chamber 11. The leak-sealing device also includes a sealing cover 10, which can be placed over the detection hole 15. This setup allows the oil and gas content in the isolation chamber 11 to be detected by the oil and gas detection instrument to determine the tightness of the connection between the seal 2 and the oil and gas pipeline. This ensures that the oil and gas content in the isolation chamber 11 is within a safe value before welding operations are carried out, thereby further enhancing the safety of the leak-sealing device. After the detection is completed, the sealing cover 10 can also seal the detection hole 15 to prevent oil and gas leakage during welding from causing a fire, relieving users of any worries and significantly improving the reliability of the leak-sealing device.

[0079] For example, the wall of the detection hole 15 extends a predetermined distance outward from the isolation cavity 11, and the inner circumference of the hole wall is provided with internal threads. The outer circumferential wall of the sealing cover 10 is provided with external threads, and the sealing cover 10 and the detection hole 15 are screwed together. This arrangement can further improve the sealing effect of the sealing cover 10 and enhance the safety of the leak-stopping device.

[0080] Optionally, the detection hole 15 is located on the side wall of the isolation chamber 11 away from the closed end of the isolation element 1. This arrangement allows the detection hole 15 to be closer to the contact point between the open end of the seal 2 and the oil and gas pipeline, thereby improving detection sensitivity, enabling faster detection of oil and gas leaks and the implementation of effective measures, thus enhancing the reliability of the leak sealing device.

[0081] Optionally, a sealing ring is provided on the open end of the seal 2, which is used to abut against the oil and gas pipeline. This feature can further improve the sealing performance between the seal 2 and the oil and gas pipeline, thereby enhancing the safety of the leak-sealing device.

[0082] like Figure 1 and Figure 8 As shown, optionally, the leak-sealing device also includes an upper cover 9, which can be placed over the closed end of the isolation member 1. This arrangement can prevent oil and gas from leaking directly outside the leak-sealing device when the conductive member 41 is damaged, thereby further improving the reliability of the leak-sealing device.

[0083] For example, the cross-section of the top cover 9 is arc-shaped. This arrangement can reduce the wind resistance of the sealing device and reduce the impact of sharp edges.

[0084] The process of using this leak-sealing device is as follows:

[0085] First, trim the opening ends of the seal 2 and the isolation member 1 according to the curvature of the oil and gas pipeline, so that the opening ends of the seal 2 and the isolation member 1 fit the shape of the oil and gas pipeline. Twist the grip to make the opening end of the seal 2 extend out of the isolation cavity 11, and put the opening end of the seal 2 against the oil and gas pipeline so that the seal 2 covers the gap of the oil and gas pipeline. Then, twist the grip in the opposite direction so that the opening end of the isolation member 1 against the oil and gas pipeline.

[0086] Then, the fixing rope 200 is looped around the oil and gas pipeline and connected to the two fixing ears 16. The rope tensioner 300 is pulled continuously to tighten the fixing rope 200 and fix the isolation piece 1 to the oil and gas pipeline.

[0087] Finally, tighten the grip again to move the seal 2 closer to the oil and gas pipeline, gradually pressing it against the pipeline. Open the inert gas source, and the inert gas source will introduce inert gas into the sealing cavity 21 through the inlet of the connecting component 4, forcing the oil and gas in the sealing cavity 21 to be discharged into the oil tank through the outlet of the connecting component 4, thereby gradually emptying the oil and gas in the sealing cavity 21. Then, close the connecting component 4 connected to the oil tank and continue to open the inert gas source to maintain a certain pressure of inert gas in the sealing cavity 21. At this time, use an oil and gas detection instrument to detect the oil and gas content of the isolation cavity 11 through the detection hole 15. If the oil and gas content of the isolation cavity 11 meets the standard, screw the sealing cover 10 onto the hole wall of the detection hole 15, and weld the open end of the isolation component 1 to the oil and gas pipeline. Close all connecting components 4, and then weld the upper cover 9 to the closed end of the isolation component 1. Remove the inert gas source and the oil tank to complete the entire sealing operation.

[0088] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A plugging device comprising a spacer (1) having a spacer cavity (11) and being open at one end and closed at the other end, the open end of the spacer (1) being fixable to a piece (100) to be plugged, characterized in that The leaking stoppage device further comprises a sealing member (2) movably arranged in the isolation cavity (11), the sealing member (2) has a sealing cavity (21) and is open at one end and closed at the other end, the open end of the sealing member (2) can abut the to-be-sealed member (100) to seal the gap of the to-be-sealed member (100), and the closed end of the sealing member (2) is rotatably provided with a threaded rod (3), the closed end of the isolation member (1) is provided with a threaded hole (12) penetratingly formed, the threaded rod (3) is matched with the threaded hole (12), and rotation of the threaded rod (3) can move the open end of the sealing member (2) to the direction close to the to-be-sealed member (100) to press against the to-be-sealed member (100).

2. The plug device of claim 1, wherein, The cavity wall of the isolation cavity (11) is provided with a sliding rail (13) along the extension direction of the threaded rod (3), and the sealing member (2) is provided with a sliding member (22) matched with the sliding rail (13).

3. The plug device of claim 2, wherein, The sliding member (22) is arranged at the closed end of the sealing member (2).

4. The plug according to any one of claims 1 to 3, characterized in that The leaking stoppage device further comprises at least two openable and closable through components (4), the outlet of at least one of the through components (4) is communicated with the sealing cavity (21), the inlet is communicated with an inert gas source outside the isolation member (1), the inlet of at least one of the through components (4) is communicated with the sealing cavity (21), and the outlet is communicated with a leakage recovery device outside the isolation member (1).

5. The plug device of claim 4, wherein, Each of the through components (4) comprises a through member (41) and a flexible pipe (42) connected with each other, the closed end of the isolation member (1) is provided with a plurality of mounting holes (14) penetratingly formed, and the through member (41) is installed in the mounting hole (14) one by one. The inlet of at least one of the through members (41) is used for being communicated with the inert gas source, and the outlet is communicated with the sealing cavity (21) through the flexible pipe (42). The inlet of at least one of the through members (41) is communicated with the sealing cavity (21) through the flexible pipe (42), and the outlet is used for being communicated with the leakage recovery device.

6. The plug device of claim 5, wherein, The closed end of the sealing member (2) is provided with at least two communication holes (23) penetratingly formed, the communication holes (23) are communicated with the flexible pipes (42) one by one, the communication holes (23) communicated with the inert gas source and the communication holes (23) communicated with the leakage recovery device are arranged on opposite sides of the threaded rod (3).

7. The plug device of claim 5, wherein, The through component (4) further comprises a switch valve (43), the switch valve (43) is arranged between the inlet of the through member (41) and the inert gas source, and the switch valve (43) is also arranged between the outlet of the through member (41) and the leakage recovery device.

8. The plug according to any one of claims 1 to 3, wherein The side wall of the isolation cavity (11) is provided with a detection hole (15) penetratingly formed, the detection hole (15) is used for allowing a detection instrument to probe into the isolation cavity (11), and the leaking stoppage device further comprises a sealing cover (10) capable of being arranged on the detection hole (15).

9. The plug device of claim 8, wherein, The detection hole (15) is arranged on the side wall of the isolation cavity (11) away from the closed end of the isolation part (1).

10. The plug according to any one of claims 1-3, wherein, The plugging device comprises a rolling bearing (6), the outer ring of the rolling bearing (6) is installed on the closed end of the sealing part (2), and the inner ring of the rolling bearing (6) is coaxially connected with the threaded rod (3). Or, the inner ring of the rolling bearing (6) is installed on the closed end of the sealing part (2), the threaded rod (3) is a hollow structure, and the outer ring of the rolling bearing (6) is coaxially connected with the outer peripheral wall of the threaded rod (3).

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