Pipe flange leak-proof sealing device

Abstract

The application relates to the technical field of flange connection, and particularly discloses a pipeline flange anti-leakage sealing device, which comprises a first pipeline and a second pipeline, and a circular flange is connected between the first pipeline and the second pipeline; the outer surface of the first pipeline is fixedly connected with a first sealing shell; the outer surface of the second pipeline is fixedly connected with a sealing assembly, the sealing assembly comprises a base fixedly connected to the outer surface of the second pipeline, and the outer surface of the base is slidably connected with a second sealing shell. The sealing assembly is arranged, the second sealing shell drives a ring-shaped sealing ring to slide along the surface of the base, when the ring-shaped sealing ring slides to a circular groove position, the ring-shaped sealing ring can effectively block the gap between the second sealing shell and the second pipeline, the cooperation between the ring-shaped sealing ring and the circular groove can improve the sealing effect between the second sealing shell and the base, reduce the gap between the second sealing ring and the base, greatly improve the sealing reliability, and significantly reduce the pipeline leakage risk.

Description

Technical Field

[0001] This application relates to the field of flange connection technology, and in particular to a leak-proof sealing device for pipeline flanges. Background Technology

[0002] In pipeline laying, flanges are key components for connecting pipes, fittings or equipment. By combining flanges, gaskets and bolts to form a sealed and fixed structure, they can effectively block the leakage channels of the medium in the pipeline, ensure reliable sealing and structural stability of the connection, and thus ensure the safe and stable operation of the pipeline system under different pressure and temperature conditions.

[0003] A search revealed that application number 202420012823.5 relates to a pipe flange sealing device, which includes a first sealing shell, a second sealing shell, a fixing element, and a sealing element. The first sealing shell is fitted onto a first pipe; the second sealing shell is fitted onto a second pipe. The first and second sealing shells are interlocked and together form a flange receiving space to accommodate the flanges of both the first and second pipes. The first sealing shell is detachably connected to the second sealing shell via the fixing element. The sealing element is positioned between the first and second sealing shells, located outside the connection point between the flanges of the first and second pipes. When disassembly, maintenance, or replacement of the sealing element is required, only the first and second sealing shells need to be separated. The disassembly and replacement process is simple and convenient.

[0004] The above solution still has certain shortcomings in actual use. When the slider slides through the groove, there is still a large gap between the slider and the groove. The dynamic friction of the slider during sliding may further wear down the contact surface between the two, causing the gap size to gradually increase. The medium in the pipeline may leak from the groove, which greatly increases the risk of pipeline leakage. To address this issue, we propose a pipeline flange anti-leakage sealing device. Utility Model Content

[0005] This application provides a pipe flange anti-leakage sealing device that uses a second sealing shell to drive an annular sealing ring to slide along the surface of a second pipe. The annular sealing ring can effectively seal the gap between the second sealing shell and the second pipe. The circular groove on the base can provide stable support for the annular sealing ring when it slides to this position, so that the annular sealing ring can preferentially seal the gap, greatly improving the sealing reliability and significantly reducing the risk of pipe leakage.

[0006] This application provides a pipe flange anti-leakage sealing device, including a first pipe and a second pipe, wherein the first pipe and the second pipe are connected by a flange.

[0007] A first sealing shell is fixedly connected to the outer surface of the first pipe;

[0008] A sealing assembly is fixedly connected to the outer surface of the second pipe. The sealing assembly includes a base fixedly connected to the outer surface of the second pipe. A second sealing shell is slidably connected to the outer surface of the base. An annular sealing ring is fixedly connected to the inner wall of the second sealing shell. A set of circular grooves is formed on the upper surface of the base.

[0009] The sealing assembly also includes a connection structure disposed on the outer surfaces of the first sealing shell and the second sealing shell.

[0010] Furthermore, an annular positioning plate is fixedly connected to one side of the base, and the bottom surface of the annular positioning plate is fixedly connected to the outer surface of the second pipe.

[0011] Furthermore, the connection structure includes a set of snap-fit ​​plates fixedly connected to the outer surface of the second sealing shell and a set of snap-fit ​​seats fixedly connected to the outer surface of the first sealing shell.

[0012] Furthermore, one of the snap-fit ​​plates has a snap-fit ​​groove on its outer surface, a guide rod is slidably connected to the inner wall of the snap-fit ​​groove, a spring is sleeved on the outer surface of the guide rod, a slider is fixedly connected to one end of the guide rod, and a limit block is fixedly connected to one side of one of the snap-fit ​​seats.

[0013] Furthermore, a pull ring is fixedly connected to the other end of the guide rod.

[0014] Furthermore, a limiting plate is fixedly connected to the outer surface of one of the card holders.

[0015] Furthermore, an annular sealing gasket is fixedly connected to one side of the first sealing shell near the second sealing shell.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] The technical solution provided in this application has at least the following technical effects or advantages:

[0018] 1. Through the set sealing components, the second sealing shell drives the annular sealing ring to slide along the base surface. When the annular sealing ring slides to the position of the circular groove, the annular sealing ring can effectively seal the gap between the second sealing shell and the second pipe. The cooperation between the annular sealing ring and the circular groove can improve the sealing effect between the second sealing shell and the base, reduce the gap between the second sealing ring and the base, greatly improve the sealing reliability, and significantly reduce the risk of pipeline leakage.

[0019] 2. Through the designed connection structure, the direct cooperation between the snap-fit ​​plate and the snap-fit ​​seat can make the first sealing shell and the second sealing shell seal more tightly. Through the designed slider and limit block, the positions of the first sealing shell and the second sealing shell can be fixed after sealing, avoiding the impact of vibration on the seal. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the entire utility model;

[0021] Figure 2 This is a three-dimensional structural diagram of the sealing assembly of this utility model;

[0022] Figure 3 This is a three-dimensional structural schematic diagram of the overall side sectional view of this utility model;

[0023] Figure 4 This utility model Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0024] Figure 5 This utility model Figure 2 Enlarged schematic diagram of the structure at point B;

[0025] In the diagram: 1. First pipe; 2. Second pipe; 3. Circular flange; 4. First sealing shell; 5. Second sealing shell; 6. Sealing assembly; 601. Base; 602. Annular sealing ring; 603. Circular groove; 604. Snap-fit ​​plate; 605. Snap-fit ​​groove; 606. Guide rod; 607. Spring; 608. Slider; 609. Pull ring; 610. Snap-fit ​​seat; 611. Limiting block; 612. Limiting plate; 7. Annular sealing gasket; 8. Annular positioning plate. Detailed Implementation

[0026] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0027] Example 1:

[0028] Please see Figure 1-5In this utility model, a pipe flange anti-leakage sealing device includes a first pipe 1 and a second pipe 2, with a circular flange 3 connecting the first pipe 1 and the second pipe 2. A first sealing shell 4 is fixedly connected to the outer surface of the first pipe 1. A sealing assembly 6 is fixedly connected to the outer surface of the second pipe 2. The sealing assembly 6 includes a base 601 fixedly connected to the outer surface of the second pipe 2, a second sealing shell 5 slidably connected to the outer surface of the base 601, an annular sealing ring 602 fixedly connected to the inner wall of the second sealing shell 5, and a set of circular grooves 603 formed on the upper surface of the base 601. The size of the annular sealing ring 602 is... Each circular groove 603 is sized to fit the flange. When sealing the flange, the second sealing shell 5 drives the annular sealing ring 602 to slide on the base 601. The annular sealing ring 602 continuously seals the gap between the second sealing shell 5 and the base 601. When the annular sealing ring 602 moves onto the circular groove 603, the cooperation between the annular sealing ring 602 and the circular groove 603 can improve the sealing effect between the second sealing shell 5 and the base 601, ensuring that the annular sealing ring 602 can stably seal the gap between the second sealing shell 5 and the base 601, greatly improving the sealing reliability and significantly reducing the risk of pipeline leakage.

[0029] like Figure 4 , Figure 5 As shown: The sealing assembly 6 also includes a connection structure disposed on the outer surfaces of the first sealing shell 4 and the second sealing shell 5. The connection structure includes a set of snap-fit ​​plates 604 fixedly connected to the outer surface of the second sealing shell 5 and a set of snap-fit ​​seats 610 fixedly connected to the outer surface of the first sealing shell 4. The snap-fit ​​plates 604 rotate on the snap-fit ​​seats 610 with the pipe as the center. The snap-fit ​​plates 604 can be displaced upward by utilizing the tilt angle on the snap-fit ​​seats 610, so that the first sealing shell 4 and the second sealing shell 5 form a tension state, which greatly improves the tightness between the first sealing shell 4 and the second sealing shell 5 and significantly reduces the risk of pipe leakage.

[0030] like Figure 2 As shown: An annular sealing gasket 7 is fixedly connected to one side of the first sealing shell 4 near the second sealing shell 5. When the second sealing shell 5 contacts the first sealing shell 4, the annular sealing gasket 7 is made of rubber. Rubber has a certain deformation ability under pressure. Squeezing the annular sealing gasket 7 can fill the small gaps and unevenness between the contact surfaces, and effectively seal the gap between the first sealing shell 4 and the second sealing shell.

[0031] like Figure 4As shown: One of the snap-fit ​​plates 604 has a snap-fit ​​groove 605 on its outer surface. A guide rod 606 is slidably connected to the inner wall of the snap-fit ​​groove 605. A spring 607 is sleeved on the outer surface of the guide rod 606. A slider 608 is fixedly connected to one end of the guide rod 606. A limit block 611 is fixedly connected to one side of one of the snap-fit ​​seats 610. When the snap-fit ​​plate 604 contacts the snap-fit ​​seat 610, the limit block 611 on the snap-fit ​​seat 610 will exert pressure on the slider 608 in the snap-fit ​​plate 604. The slider 608 can be displaced by the spring 607. The limit block 611 then enters the snap-fit ​​groove 605. The slider 608 will lock the limit block 611 that has entered the snap-fit ​​groove 605, thereby fixing the position of the snap-fit ​​plate 604 and the snap-fit ​​seat 610.

[0032] like Figure 5 As shown: a limiting plate 612 is fixedly connected to the outer surface of one of the snap-fit ​​seats 610. The limiting plate 612 can prevent the snap-fit ​​plate 604 from sliding out of the effective position of the snap-fit ​​seat 610 when it slides on the snap-fit ​​seat 610, thus ensuring the snap-fit ​​effect between the snap-fit ​​plate 604 and the snap-fit ​​seat 610.

[0033] like Figure 4 As shown: The other end of the guide rod 606 is fixedly connected to a pull ring 609, which provides convenience for the staff to pull out the pull ring 609 and facilitates the separation between the snap plate 604 and the snap seat 610.

[0034] like Figure 3 As shown: An annular positioning plate 8 is fixedly connected to one side of the base 601. The bottom surface of the annular positioning plate 8 is fixedly connected to the outer surface of the second pipe 2. When the staff checks the connection of the circular flange 3, the annular positioning plate 8 can prevent the second sealing shell 5 from displacing too much. The annular sealing ring 602 inside the second sealing shell 5 will deform due to the release of pressure, which can maintain the sealing performance of the annular sealing ring 602.

[0035] The working principle of this application is as follows: When sealing the circular flange 3, the second sealing shell 5 causes the annular sealing ring 602 to slide on the base 601. When the annular sealing ring 602 slides to the position of the circular groove 603, the cooperation between the annular sealing ring 602 and the circular groove 603 can improve the sealing effect between the second sealing shell 5 and the base 601, enabling the annular sealing ring 602 to stably seal the gap between the second sealing shell 5 and the base 601. When the first sealing shell 4 contacts the second sealing shell 5, the second sealing shell 5 is rotated, and the snap-fit ​​plate 604 on the second sealing shell 5 will contact the snap-fit ​​seat 610 on the first sealing shell 4. The snap-fit ​​plate 604 can be driven by the rotational force to move upward through the tilt angle on the snap-fit ​​seat 610, thereby forming a tension state between the first sealing shell 4 and the second sealing shell 5, and the annular sealing ring on the first sealing shell 4... During the compression process, the gasket 7 deforms to fill the gap between the first sealing shell 4 and the second sealing shell 5. The limiting block 611 on the snap-fit ​​seat 610 exerts pressure on the slider 608 in the snap-fit ​​plate 604. The slider 608 can be displaced by the spring 607, and the limiting block 611 enters the slot 605. The slider 608 will lock the limiting block 611 in the slot 605, thereby fixing the position of the second sealing shell 5, which greatly improves the sealing reliability and significantly reduces the risk of pipeline leakage. When it is necessary to inspect the circular flange 3, the operator can pull the pull ring 609 to make the limiting block 611 leave the slot 605, and then rotate the second sealing shell 5 to complete the separation of the second sealing shell 5 from the first sealing shell 4. This facilitates the operator to check the sealing performance of the pipeline flange, avoids leakage caused by workpiece aging, and reduces the risk of pipeline leakage.

[0036] The above description is merely a preferred embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present application, based on the technical solution and concept of the present application, should be covered within the scope of protection of the present application.

Claims

1. A pipe flange anti-leakage sealing device, characterized in that: It includes a first pipe (1) and a second pipe (2), and a circular flange (3) is connected between the first pipe (1) and the second pipe (2); The outer surface of the first pipe (1) is fixedly connected to a first sealing shell (4); A sealing assembly (6) is fixedly connected to the outer surface of the second pipe (2). The sealing assembly (6) includes a base (601) fixedly connected to the outer surface of the second pipe (2). A second sealing shell (5) is slidably connected to the outer surface of the base (601). An annular sealing ring (602) is fixedly connected to the inner wall of the second sealing shell (5). A set of circular grooves (603) are opened on the upper surface of the base (601). The size of the annular sealing ring (602) is adapted to the size of each of the circular grooves (603). The sealing assembly (6) also includes a connection structure disposed on the outer surfaces of the first sealing shell (4) and the second sealing shell (5).

2. The pipe flange anti-leakage sealing device according to claim 1, characterized in that: An annular positioning plate (8) is fixedly connected to one side of the base (601), and the bottom surface of the annular positioning plate (8) is fixedly connected to the outer surface of the second pipe (2).

3. The pipe flange anti-leakage sealing device according to claim 1, characterized in that: The connection structure includes a set of snap-fit ​​plates (604) fixedly connected to the outer surface of the second sealing shell (5) and a set of snap-fit ​​seats (610) fixedly connected to the outer surface of the first sealing shell (4).

4. The pipe flange anti-leakage sealing device according to claim 3, characterized in that: One of the snap-fit ​​plates (604) has a snap-fit ​​groove (605) on its outer surface. A guide rod (606) is slidably connected to the inner wall of the snap-fit ​​groove (605). A spring (607) is sleeved on the outer surface of the guide rod (606). A slider (608) is fixedly connected to one end of the guide rod (606). A limiting block (611) is fixedly connected to one side of one of the snap-fit ​​seats (610).

5. The pipe flange anti-leakage sealing device according to claim 4, characterized in that: The other end of the guide rod (606) is fixedly connected to a pull ring (609).

6. The pipe flange anti-leakage sealing device according to claim 3, characterized in that: A limiting plate (612) is fixedly connected to the outer surface of one of the card holders (610).

7. The pipe flange anti-leakage sealing device according to claim 1, characterized in that: An annular sealing gasket (7) is fixedly connected to one side of the first sealing shell (4) near the second sealing shell (5).

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