Air leakage plugging device and pipeline
By designing a leak-sealing device, and utilizing a combination of a telescopic cover and a limiting block, the leakage problem caused by thermal expansion of the flange sealing surface was solved, enabling timely detection and repair of the sealing effect of the pipeline under positive and negative pressure.
Patent Information
- Application Number
- CN202522380297.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-10
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-11-10
AI Technical Summary
In the prior art, the flange sealing surface may fail due to thermal expansion and fluctuating cyclic loads, leading to gas and material leakage, especially serious leakage problems in pipelines conveying powdery materials.
Design an air leakage sealing device, including a telescopic cover and a limiting block. The telescopic cover cooperates with the limiting block through an airbag to form a temporary closed space. The telescopic cover can expand and contract under positive and negative pressure to seal the flange gap. The limiting groove and baffle increase the positioning stability. The rangefinder and alarm are used to detect and indicate sealing failure in a timely manner.
It effectively reduces gas and material leakage, promptly detects and alerts to the location of seal failure, and ensures the sealing performance during pipeline transportation.
Smart Images
Figure CN224932405U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pipeline sealing technology, and in particular to a leak sealing device and pipeline. Background Technology
[0002] Pipelines are typically composed of multiple pipe sections, with adjacent sections connected by flanges. Tightening bolts causes the flanges at both ends of the pipe sections to press against each other, achieving a seal. A gasket is usually placed between the sealing surfaces of the flanges at both ends to improve sealing performance. However, in actual use, factors such as thermal expansion and fluctuating cyclic loads can cause relative movement between the flange sealing surfaces, affecting the flange's sealing function and leading to gas leakage. In pipelines used to transport powdery materials, this can even cause material leakage. Utility Model Content
[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a leak-sealing device and pipeline.
[0004] The solution to the technical problem of this utility model is: Firstly, a leak-sealing device is proposed, applied at the connection of two pipe sections connected by a flange, the leak-sealing device comprising: A telescopic cover, which is annular and has an inner ring wall and an outer ring wall, with an air bladder formed between the inner ring wall and the outer ring wall. The inner ring wall is provided with an installation port, which communicates with the air bladder and is used to allow the flange to extend into the air bladder. The limiting block is provided in two parts, which are respectively connected to the outer periphery of the two sections of the tube. The telescopic cover is located between the two limiting blocks. When the airbag is inflated, the two ends of the telescopic cover along the length direction abut against the two limiting blocks respectively.
[0005] This invention has at least the following beneficial effects: the telescopic cover can extend and retract along its length. When the flange seal of the pipeline fails, the pressure inside the pipe forms an airflow that rushes out or is drawn in through the gap between the flanges, causing the internal air pressure of the airbag to rise or fall, thereby causing the telescopic cover to extend and retract. During positive pressure transport, the airbag inflates, and the two ends of the telescopic cover abut against the limiting blocks on both sides, forming a temporary closed space together with the limiting blocks, reducing gas or material leakage. During negative pressure transport, the two ends of the telescopic cover contract along its length, and the inner wall of the airbag abuts against the flange under negative pressure, forming a temporary seal.
[0006] As a further improvement to the above technical solution, a limiting groove is provided on the side of the outer ring wall facing the airbag, and the limiting groove is used to engage the flange. The limiting groove can position the telescopic cover and prevent the telescopic cover from moving relative to the flange during the telescopic process.
[0007] As a further improvement to the above technical solution, the limiting block includes a limiting ring and a baffle. The baffle is connected to the outer periphery of the limiting ring and extends radially along the limiting ring. The limiting ring is connected to the outer periphery of the pipe body. Because of the baffle, the end face of the telescopic cover can be blocked, increasing the contact area between the telescopic cover and the limiting block, reducing the deformation of the end face of the telescopic cover, and ensuring a temporary sealing effect.
[0008] As a further improvement to the above technical solution, the limiting ring includes a first half-ring and a second half-ring, which are detachably connected. This arrangement facilitates the installation and position adjustment of the limiting block.
[0009] As a further improvement to the above technical solution, the leakage sealing device also includes at least two rangefinders, which are respectively located at both ends of the telescopic cover along its length. The detection ends of the rangefinders are respectively positioned facing the telescopic cover, and the rangefinders are used to detect the positions of both ends of the telescopic cover. By setting up the rangefinders, the telescopic movement of the cover can be detected in a timely manner, facilitating workers to inspect and repair the location of the sealing failure.
[0010] As a further improvement to the above technical solution, the leakage sealing device also includes an alarm, which is electrically connected to the rangefinder. The alarm is configured to issue an alarm signal when the rangefinder senses a positional movement at the end face of the telescopic cover. With this configuration, when the telescopic cover extends or retracts, the alarm can promptly alert the worker, allowing them to promptly inspect and repair the area where the seal has failed.
[0011] As a further improvement to the above technical solution, the two limiting blocks are positioned between the two rangefinders. This arrangement avoids interference from the rangefinders in creating a temporary enclosed space between the limiting blocks and the telescopic cover, and effectively enables position detection of the end face of the telescopic cover.
[0012] As a further improvement to the above technical solution, the leakage sealing device also includes two mounting rings. The rangefinders located at both ends of the telescopic cover are respectively connected to the two mounting rings, and the mounting rings are detachably connected to the outer periphery of the two sections of the pipe. This arrangement facilitates the installation and removal of the rangefinders, thereby simplifying subsequent maintenance and repair.
[0013] As a further improvement to the above technical solution, a connecting plate is provided on the outer periphery of the mounting ring. The connecting plate extends radially along the mounting ring and has a threaded hole. The outer periphery of the rangefinder has a threaded section, which is threadedly connected to the wall of the threaded hole. This arrangement allows for adjustment of the position of the detection end of a single rangefinder according to actual conditions, facilitating zeroing of a single rangefinder. Furthermore, it enables the installation and removal of a single rangefinder, facilitating its maintenance and replacement.
[0014] Secondly, a pipeline is proposed, including a leak-sealing device as described in any of the above technical solutions. Because of the leak-sealing device, when the flange seal in the pipeline fails, the leak-sealing device can establish a temporary seal at the connection between the first and second pipe bodies, reducing gas or material leakage during pipeline transportation. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly explained below. Obviously, the described drawings are only a part of the embodiments of this utility model, and not all of them. Those skilled in the art can obtain other design schemes and drawings based on these drawings without creative effort.
[0016] Figure 1 This is a schematic diagram of the overall structure of the leak sealing device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of the telescopic cover according to an embodiment of the present invention; Figure 3 This is a schematic diagram illustrating the use of the telescopic cover according to an embodiment of this utility model; Figure 4 This is a schematic diagram of the structure of the limiting block according to an embodiment of the present utility model; Figure 5 This is a schematic diagram showing the connection between the rangefinder and the mounting ring according to an embodiment of the present invention.
[0017] Reference numerals: 100, telescopic cover; 110, airbag; 120, inner ring wall; 121, mounting port; 130, outer ring wall; 131, limiting groove; 200, limiting block; 210, baffle; 220, limiting ring; 221, first half ring; 222, second half ring; 300, rangefinder; 310, threaded section; 400, mounting ring; 410, connecting plate; 420, third half ring; 430, fourth half ring; 500, first pipe body; 600, second pipe body; 700, flange. Detailed Implementation
[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0019] In the description of this utility model, the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, 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.
[0020] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.
[0021] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0022] Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. The various technical features of this utility model can be combined interactively without contradicting each other.
[0023] Firstly, this utility model provides a leak-sealing device that can temporarily seal pipes that have failed to seal, thus preventing powder leakage.
[0024] Reference Figure 1 , Figure 2 and Figure 3The air leakage sealing device includes a telescopic cover 100 and limiting blocks 200. The telescopic cover 100 is annular, having an inner annular wall 120 and an outer annular wall 130, forming an air bladder 110 between the inner annular wall 120 and the outer annular wall 130. An installation port 121 is provided on the inner annular wall 120, which is opened along the circumference of the inner annular wall 120 and communicates with the air bladder 110. Two limiting blocks 200 are provided, located on both sides of the telescopic cover 100 along its length. It can be understood that when the air bladder 110 of the telescopic cover 100 is inflated, both ends of the telescopic cover 100 abut against the two limiting blocks 200 respectively.
[0025] In use, two limiting blocks 200 are respectively connected to the outer periphery of the two pipe sections, while the telescopic cover 100 is fitted onto the outer periphery of the two pipe sections and located at the connection point of the two pipe sections. The two pipe sections are connected by a flange 700. The flange 700 extends into the airbag 110 through the mounting port 121, and the telescopic cover 100 can wrap around the outer periphery of the flange 700.
[0026] It is understood that the telescopic cover 100 can extend and retract along its length. The leak-sealing device of this embodiment can be applied to pipelines in the field of positive and negative pressure conveying. When the flange 700 seal fails, the pressure inside the pipe forms an airflow that rushes out or is drawn in through the gap between the flanges 700, causing the internal air pressure of the airbag 110 to rise or fall, thereby causing the telescopic cover 100 to extend and retract. When the airbag 110 is inflated, the two ends of the telescopic cover 100 along its length abut against the two limiting blocks 200 respectively, and the telescopic cover 100 and the limiting blocks 200 form a temporary closed space to reduce gas or material leakage. During negative pressure conveying, the two ends of the telescopic cover 100 along its length contract, and the inner wall of the airbag 110 can abut against the flange 700 under the action of negative pressure, forming a temporary seal on the gap between the flanges 700.
[0027] Understandably, the telescopic cover 100 is made of a flexible material, allowing it to be directly fitted onto the outer circumference of the pipe body. A sealing strip can also be installed around the mounting opening 121 of the telescopic cover 100, making the connection between the telescopic cover 100 and the flange 700 tighter. Understandably, since the opening of the flange 700 is located on its outer circumference, when gas rushes out, the gas flow direction is outward, and most of the gas preferentially fills the telescopic cover 100, causing it to quickly extend and abut against the limiting blocks 200 on both sides, forming a temporary closed space. Under negative pressure conditions, gas located near the outer side of the flange 700 is preferentially drawn in, causing part of the outer ring wall 130 of the telescopic cover 100 at the outer side of the flange 700 to be adsorbed onto the flange 700, achieving a temporary seal. Therefore, the gap between the telescopic cover 100 and the flange 700 does not affect the telescopic movement of the telescopic cover 100.
[0028] In some embodiments, a limiting groove 131 is provided on the side of the outer annular wall 130 of the telescopic cover 100 facing the airbag 110. In use, the flange 700 is engaged with the limiting groove 131. The limiting groove 131 can position the telescopic cover 100 and prevent the telescopic cover 100 from moving relative to the flange 700 during telescopic movement. Moreover, under negative pressure conditions, the groove wall of the limiting groove 131 can contract towards the flange 700 and form a seal on the flange 700.
[0029] In some embodiments, the limiting groove 131 is provided in the middle of the telescopic cover 100. When the flange 700 seal fails, gas rushes out from the gap between the flanges 700 into the airbag 110 and flows to both ends of the telescopic cover 100. Both ends of the telescopic cover 100 can quickly abut against the limiting block 200.
[0030] In some embodiments, refer to Figure 4 The limiting block 200 includes a limiting ring 220 and a baffle 210. The baffle 210 is connected to the outer periphery of the limiting ring 220 and extends radially along the limiting ring 220. The limiting ring 220 is connected to the outer periphery of the tube body. It can be understood that the limiting ring 220 is fitted onto the outside of the tube body. When the telescopic cover 100 extends, the end face of the telescopic cover 100 can abut against the limiting ring 220, thereby forming a closed space. Because of the baffle 210, the baffle 210 can block the end face of the telescopic cover 100, increasing the contact area between the telescopic cover 100 and the limiting block 200, reducing the deformation of the end face of the telescopic cover 100, and preventing the deformation of the end face from breaking the sealing effect of the closed space during the continued inflation process inside the telescopic cover 100.
[0031] In some embodiments, the limiting ring 220 includes a first half-ring 221 and a second half-ring 222, which are detachably connected. During installation, the first half-ring 221 and the second half-ring 222 are respectively snapped onto the outside of the pipe body and then connected and fixed by bolts or other connecting parts, which is more conducive to the installation and position adjustment of the limiting block 200.
[0032] In some embodiments, the leak sealing device further includes at least two rangefinders 300, which are respectively disposed at both ends of the telescopic cover 100 along its length. The detection ends of the rangefinders 300 are respectively positioned facing the telescopic cover 100, and the rangefinders 300 are used to detect the positions of the two ends of the telescopic cover 100. When the end face of the telescopic cover 100 moves, it can be determined that the telescopic cover 100 has performed a telescopic action. At this time, the rangefinders 300 provide the worker with the position information of the end face of the telescopic cover 100 to prompt the worker to handle the leak location.
[0033] In some embodiments, the rangefinder 300 is electrically connected to the controller via a signal transmission line. After acquiring position information, the rangefinder 300 transmits the position information to the controller, which then controls the display screen to show the relevant information for the worker's convenience. The controller can be a microcontroller, PLC controller, etc.
[0034] In some embodiments, the leak sealing device also includes an alarm, which is electrically connected to the rangefinder 300 via a signal transmission line. When the rangefinder 300 senses the positional movement of the end face of the telescopic cover 100, the alarm can issue an alarm signal, thereby prompting workers to handle the leak location and making the leak repair of the pipeline more timely.
[0035] Understandably, alarms can be buzzers, indicator lights, etc., and can send alarm signals to workers through sound, light, and other prompts.
[0036] In some embodiments, the limiting block 200 is disposed between two rangefinders 300, which can prevent the rangefinders 300 from interfering with the temporary enclosed space formed between the limiting block 200 and the telescopic cover 100, and can effectively detect the position of the end face of the telescopic cover 100. It is understood that in embodiments with a baffle 210, the rangefinders 300 should be staggered from the baffle 210 to avoid the baffle 210 obstructing the rangefinders 300. Of course, the baffle 210 can also be transparent, and the rangefinders 300 can detect the position of the end face of the telescopic cover 100 by means of infrared ranging or other methods.
[0037] In some embodiments, the leak sealing device may include two mounting rings 400, with rangefinders 300 located at both ends of the telescopic cover 100 respectively connected to the two mounting rings 400. The mounting rings 400 are detachably connected to the outer periphery of the two pipe sections. This arrangement facilitates the installation and removal of the rangefinders 300, thereby enabling subsequent maintenance and repair of the rangefinders 300.
[0038] In some embodiments, refer to Figure 5 The mounting ring 400 has the same structure as the limiting ring 220. The mounting ring 400 includes a third half-ring 420 and a fourth half-ring 430. The third half-ring 420 and the fourth half-ring 430 are respectively snapped onto the outside of the pipe body and then connected and fixed by bolts and other connecting parts, which makes it easier to install and adjust the position of the mounting ring 400. A connecting plate 410 is also provided on the outer periphery of the mounting ring 400. The connecting plate 410 extends radially along the mounting ring 400 and is provided with screw holes. The screw holes penetrate both ends of the connecting plate 410 along the length of the pipe body. A threaded section 310 is provided on the outer periphery of the rangefinder 300. The threaded section 310 is connected to the wall of the screw hole by threads.
[0039] The rangefinder 300 is connected to the connecting plate 410 by a thread, which allows the position of the detection end of the rangefinder 300 to be adjusted according to the actual situation. This is beneficial for zeroing the rangefinder 300. In addition, it allows for the installation and removal of a single rangefinder 300, which is beneficial for the maintenance and replacement of a single rangefinder 300.
[0040] In some embodiments, each mounting ring 400 is connected to two connecting plates 410, which can mount two rangefinders 300. Specifically, the two connecting plates 410 are respectively connected to the middle of the third half-ring 420 and the fourth half-ring 430. Setting up multiple rangefinders 300 for detection can improve the accuracy of detection, thereby enabling timely detection of sealing issues.
[0041] In some embodiments, the mounting structure formed by the mounting ring 400 and the connecting plate 410 is the same as the structure of the limiting block 200. That is, the limiting block 200 can be used as the mounting structure formed by the mounting ring 400 and the connecting plate 410, and the mounting structure can also be used as the limiting block 200. This arrangement can reduce the number of molds to be made for the parts of the air leakage sealing device and reduce production costs.
[0042] By using the leak-sealing device of this embodiment, after the pipeline seal fails, the pressure inside the pipe forms an airflow that rushes out or is drawn in through the gap between the flanges 700, causing the internal air pressure of the airbag 110 to rise or fall, thereby pushing the telescopic cover 100 to extend or retract. After the rangefinder 300 detects the movement of the end face of the telescopic cover 100, it transmits the position signal to the back-end controller through the signal transmission line, and the controller controls the alarm to sound. When the airbag 110 is inflated, the end face of the telescopic cover 100 abuts against the limiting block 200, forming a temporary seal to reduce powder leakage.
[0043] Secondly, this utility model embodiment provides a pipeline including a leak-sealing device as described in any embodiment of the first aspect. It is understood that the pipeline also includes a first pipe body 500 and a second pipe body 600, which are connected by a flange 700. The telescopic cover 100 of the leak-sealing device is fitted onto the flange 700, and two limiting blocks 200 are respectively installed on the outer periphery of the first pipe body 500 and the second pipe body 600.
[0044] Understandably, due to the presence of a leak-sealing device, when the flange 700 seal in the pipeline fails, the leak-sealing device can establish a temporary seal at the connection between the first pipe body 500 and the second pipe body 600, reducing gas or material leakage during pipeline transportation.
[0045] Because the pipeline uses the aforementioned leak-sealing device, it also possesses all the beneficial effects of the aforementioned leak-sealing device, which will not be elaborated upon here.
[0046] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.
Claims
1. A leak-sealing device, characterized in that, Applied at the connection of two pipe sections connected by a flange (700), the leak-sealing device includes: A telescopic cover (100) is annular and has an inner ring wall (120) and an outer ring wall (130). An airbag (110) is formed between the inner ring wall (120) and the outer ring wall (130). The inner ring wall (120) is provided with an installation port (121), which communicates with the airbag (110) and is used to allow the flange (700) to extend into the airbag (110). The limiting block (200) is provided in two parts, and the two limiting blocks (200) are respectively connected to the outer periphery of the two sections of the tube. The telescopic cover (100) is located between the two limiting blocks (200). When the airbag (110) is inflated, the two ends of the telescopic cover (100) along the length direction abut against the two limiting blocks (200) respectively.
2. The leak sealing device according to claim 1, characterized in that, The outer ring wall (130) has a limiting groove (131) on one side facing the airbag (110), and the limiting groove (131) is used to engage the flange (700).
3. The leak sealing device according to claim 1, characterized in that, The limiting block (200) includes a limiting ring (220) and a baffle (210). The baffle (210) is connected to the outer periphery of the limiting ring (220) and extends radially along the limiting ring (220). The limiting ring (220) is connected to the outer periphery of the tube body.
4. The leak sealing device according to claim 3, characterized in that, The limiting ring (220) includes a first half-ring (221) and a second half-ring (222), which are detachably connected.
5. The leak sealing device according to claim 1, characterized in that, The air leakage sealing device also includes at least two rangefinders (300), which are respectively located at both ends of the telescopic cover (100) along the length direction. The detection ends of the rangefinders (300) are respectively set towards the telescopic cover (100), and the rangefinders (300) are used to detect the positions of both ends of the telescopic cover (100).
6. The leak sealing device according to claim 5, characterized in that, The leak sealing device also includes an alarm, which is electrically connected to the rangefinder (300). The alarm is configured to issue an alarm signal when the rangefinder (300) senses a positional movement of the end face of the telescopic cover (100).
7. The leak sealing device according to claim 5, characterized in that, The two limiting blocks (200) are located between the two rangefinders (300).
8. The leak sealing device according to claim 5, characterized in that, The air leakage sealing device also includes two mounting rings (400). The rangefinders (300) located at both ends of the telescopic cover (100) are respectively connected to the two mounting rings (400). The mounting rings (400) are detachably connected to the outer periphery of the two sections of the pipe body.
9. The leak sealing device according to claim 8, characterized in that, The mounting ring (400) is provided with a connecting plate (410) on its outer periphery. The connecting plate (410) extends radially along the mounting ring (400). The connecting plate (410) is provided with a screw hole. The rangefinder (300) is provided with a threaded section (310) on its outer periphery. The threaded section (310) is connected to the wall of the screw hole by a thread.
10. A pipe, characterized in that, Includes the leak sealing device as described in any one of claims 1 to 9.