A sealing flange

Abstract

This utility model relates to the field of flange technology, and provides a sealing flange, including a first flange, a second flange mounted on one end of the first flange, flange necks fixed at the ends of the first and second flanges that are far apart from each other, a retaining ring fixed at one end of the flange neck, a connecting structure provided inside the first and second flanges, and a reinforcing structure provided on the outside of the flange neck. This utility model, by providing a reinforcing structure, forms an annular sealing cavity through the engagement of a first slider and a second slider, which, together with a first sealing gasket and a second sealing gasket, forms a double seal, blocking the path of media leakage from the edges or bolt gaps. Furthermore, the snap-fit ​​and slot engagement, under the action of a torsion spring, ensures a tight fit of the sliders, enhancing vibration and deformation resistance and preventing the degradation of sealing performance during long-term use.

Description

Technical Field

[0001] This utility model relates to the field of flange technology, and in particular to a sealing flange. Background Technology

[0002] A flange is a mechanical part used for detachable connections between pipes, valves, equipment, or containers. It is typically disc-shaped or annular with bolt holes, and sealing and structural fixation are achieved by bolting. Flange connections allow for quick assembly and disassembly of systems during maintenance, repair, or replacement, while ensuring no leakage of the medium under pressure. A sealing flange is a flange structure specifically designed to ensure zero leakage of the medium at pipe, valve, or equipment connections. Its core feature is maintaining long-term reliable sealing performance under high pressure, high temperature, corrosive, or hazardous media conditions through special sealing surface design, high-performance gaskets, or self-tightening sealing mechanisms.

[0003] To address this, patent CN211398890U discloses a sealing flange, comprising a flange body and a fixing mechanism. A sealing gasket made of rubber is placed between a first flange and a second flange to prevent wear between the first and second flanges, thus improving sealing performance. A protective gasket and a sealing ring are placed on the inner side of the second flange to protect the components being installed and reduce wear on the second flange. A fixing mechanism is provided on the outside of the flange body to fix the flange body during installation and to protect it from damage caused by external impacts. The first connecting block and the second connecting block are fixedly connected by a snap-fit ​​connection between a fixing protrusion and a connecting groove. A wear-resistant layer is provided to protect the flange body. A perforation is provided on the surface of the second flange to provide lubricant to the second flange, ensuring its normal use.

[0004] The sealing flanges described above are sealed by a rubber gasket between the first and second flanges and a sealing ring inside the second flange during use. This makes it difficult to achieve multiple seals, which weakens the sealing effect. Furthermore, the connection between the fixed protrusion and the connecting groove does not enhance the vibration and deformation resistance, resulting in low overall structural strength. Utility Model Content

[0005] The purpose of this invention is to provide a sealing flange to solve the defect that existing sealing flanges are not convenient for strengthening structural strength.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a sealing flange, including a first flange;

[0007] A second flange is installed at one end of the first flange. Flange necks are fixed at the ends of the first flange and the second flange that are far apart from each other. A retaining ring is fixed at one end of the flange neck. A connection structure is provided inside the first flange and the second flange.

[0008] A reinforcing structure is provided on the outer side of the flange neck. A first slider is installed on the outer side of the flange neck at one end of the first flange. A first sealing cavity is provided inside the first slider. A first sealing gasket is provided at the bottom of the first sealing cavity. A second slider is installed on the outer side of the flange neck at one end of the second flange. A second sealing cavity is provided inside the second slider. A second sealing gasket is provided at the top of the second sealing cavity.

[0009] Preferably, the connection structure includes a groove at the top of the first flange, a sealing ring installed inside the groove, a protrusion fixed at the bottom of the second flange, and through holes at the inner edges of both the first and second flanges, with connecting bolts installed inside the through holes.

[0010] Preferably, the inside of the groove fits into the outside of the protrusion, the bottom end of the protrusion abuts against the top end of the sealing ring, the through holes are evenly distributed at the inner edges of the first flange and the second flange, and the first flange and the second flange are fixedly connected by connecting bolts.

[0011] With the above structure, the groove and the protrusion interlock during use, which can achieve precise positioning when the first flange and the second flange are connected, avoiding misalignment during the connection process. This lays the foundation for subsequent sealing and fixing, ensuring the accuracy of the flange connection. When the two flanges are fixed by connecting bolts, the protrusion will squeeze the sealing ring, causing the sealing ring to deform and fill the gap between the groove and the protrusion, forming an effective seal and preventing the medium from leaking from the connection of the two flanges.

[0012] Preferably, a hinge seat is fixed to the outer side of the top of the first slider, a fixing rod is installed inside the hinge seat, a torsion spring is installed on the outer side of the fixing rod, a connecting block is fixed to both ends of the torsion spring, a connecting rod is fixed to one side of the connecting block, a buckle is fixed to one end of the connecting rod, and a slot is provided at the top of the second slider.

[0013] Preferably, both the first slider and the second slider are arranged in a ring shape, and the first slider and the second slider are slidably connected to the flange neck, with the outer side of the second slider engaging with the inner side of the first slider.

[0014] With the above structure, during use, the outer side of the second slider and the inner side of the first slider can be fitted together to form a ring-shaped enclosure around the areas where the first and second flanges are located, avoiding gaps. At the same time, the pressure of the gasket can be evenly transmitted, improving the sealing effect of the double gasket and effectively blocking the leakage path of the medium. Furthermore, the first and second sliders are slidably connected to the flange neck, which facilitates the adjustment of their positions during installation or maintenance, allowing them to be precisely close to each other and fit together, adapting to the sealing requirements under different working conditions.

[0015] Preferably, the bottom end of the second slider abuts against the top end of the first sealing gasket, the top end of the connecting bolt abuts against the bottom end of the second sealing gasket, and the bottom end of the connecting bolt abuts against the top end of the first sealing gasket.

[0016] With the above structure, the first and second sealing gaskets deform under pressure during use, which not only fills the gap between the sliders, but also seals the gap between the connecting bolts and the flange, forming a multi-dimensional sealing barrier and further preventing the medium from leaking from different paths.

[0017] Preferably, the hinge seats are evenly spaced on the outer side of the top of the first slider, the connecting block and the hinge seats are hinged together by a fixing rod, the slots are evenly spaced at the top of the second slider, the slots correspond one-to-one with the buckles, and the buckles and the second slider are engaged by the slots.

[0018] With the above structure, the buckle can rotate around the fixed rod during use, making it easy to snap the buckle into the slot during installation or to disengage it during maintenance, making operation flexible and convenient. The snap-fit ​​structure formed by the buckle and the slot can firmly connect the first slider and the second slider, preventing relative displacement between them due to vibration or pressure changes during operation, ensuring the stability of the sealing structure. At the same time, in conjunction with the elastic force of the torsion spring, it can continuously apply a clamping force to the slider, ensuring that the first and second sealing gaskets are always under pressure, maintaining long-term effective sealing performance, and avoiding leakage due to insufficient pressure of the sealing gasket caused by the slider loosening.

[0019] The sealing flange provided by this utility model has the following advantages:

[0020] By setting up a connection structure, the first flange and the second flange are precisely connected through the interlocking of the groove and the protrusion, avoiding misalignment that would affect the seal. Then, the two flanges are firmly fixed by connecting bolts. The pre-tightening force of the bolts compresses the sealing ring, causing the sealing ring to deform under pressure and fill the gap to form the first sealing barrier, preventing media leakage and enhancing the sealing effect.

[0021] By incorporating a reinforced structure, the first and second sliders are fitted together to form an annular sealing cavity, which, together with the first and second sealing gaskets, forms a double seal, blocking the path of leakage of the medium from the edge or bolt gap. Furthermore, the sliders are tightly fitted by snap-fitting with the slot under the action of the torsion spring, enhancing the resistance to vibration and deformation, and preventing the sealing performance from deteriorating over long-term use. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0023] Figure 2 This is a three-dimensional exploded structural diagram of the present invention;

[0024] Figure 3 This is a three-dimensional cross-sectional structural diagram of the present invention;

[0025] Figure 4 This is a three-dimensional exploded view of the reinforcing structure of this utility model;

[0026] Figure 5 This is a three-dimensional exploded view of the connection structure of this utility model.

[0027] The reference numerals in the figure are as follows: 1. First flange; 2. Second flange; 3. Flange neck; 4. Retaining ring; 5. Connecting structure; 501. Groove; 502. Sealing ring; 503. Protrusion; 504. Through hole; 505. Connecting bolt; 6. Reinforcing structure; 601. First slider; 602. First sealing cavity; 603. First sealing gasket; 604. Second slider; 605. Second sealing cavity; 606. Second sealing gasket; 607. Hinge seat; 608. Fixing rod; 609. Torsion spring; 610. Connecting block; 611. Connecting rod; 612. Snap fastener; 613. Slot. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figure 1-5 The present invention provides a sealing flange, comprising a first flange 1.

[0030] Reference Figure 2 , Figure 3 and Figure 5As shown, a second flange 2 is installed at one end of the first flange 1. Flange necks 3 are fixed at the ends of the first flange 1 and the second flange 2 that are far apart from each other. A retaining ring 4 is fixed at one end of the flange neck 3. A connecting structure 5 is provided inside the first flange 1 and the second flange 2. The connecting structure 5 includes a groove 501 provided at the top of the first flange 1. A sealing ring 502 is installed inside the groove 501. A protrusion 503 is fixed at the bottom of the second flange 2. Through holes 504 are provided at the inner edge positions of the first flange 1 and the second flange 2. Connecting bolts 505 are installed inside the through holes 504. The inside of the groove 501 fits into the outside of the protrusion 503. The bottom end of the protrusion 503 abuts against the top end of the sealing ring 502. The through holes 504 are evenly distributed at the inner edge positions of the first flange 1 and the second flange 2. The first flange 1 and the second flange 2 are fixedly connected by connecting bolts 505.

[0031] The groove 501 at the top of the first flange 1 and the protrusion 503 at the bottom of the second flange 2 interlock to form a preliminary positioning structure, ensuring accurate docking of the two flanges and avoiding sealing failure caused by misalignment. When the two flanges are docked, the sealing ring 502 is compressed and deformed, filling the gap between the groove 501 and the protrusion 503 to form the first sealing barrier and prevent media leakage. Then, the connecting bolt 505 is passed through the through hole 504 and tightened to firmly fix the two flanges. The preload of the bolts further compresses the sealing ring 502, enhancing the sealing effect and ensuring the stability of the overall structure.

[0032] Reference Figures 1-4As shown, a reinforcing structure 6 is provided on the outer side of the flange neck 3. A first slider 601 is installed on the outer side of the flange neck 3 at one end of the first flange 1. A first sealing cavity 602 is provided inside the first slider 601, and a first sealing gasket 603 is provided at the bottom of the first sealing cavity 602. A second slider 604 is installed on the outer side of the flange neck 3 at one end of the second flange 2. A second sealing cavity 605 is provided inside the second slider 604, and a second sealing gasket 606 is provided at the top of the second sealing cavity 605. A hinge seat 607 is fixed on the outer side of the top of the first slider 601. A fixing rod 608 is installed inside the hinge seat 607. A torsion spring 609 is installed on the outer side of the fixing rod 608. Connecting blocks 610 are fixed at both ends of the torsion spring 609. A connecting rod 611 is fixed on one side of the connecting block 610. A buckle 612 is fixed at one end of the connecting rod 611. The second slider 604... The top of the first slider 601 and the second slider 604 are both circularly arranged. The first slider 601 and the second slider 604 are slidably connected to the flange neck 3. The outer side of the second slider 604 is fitted into the inner side of the first slider 601. The bottom end of the second slider 604 abuts against the top end of the first sealing gasket 603. The top end of the connecting bolt 505 abuts against the bottom end of the second sealing gasket 606. The bottom end of the connecting bolt 505 abuts against the top end of the first sealing gasket 603. The hinge seats 607 are evenly distributed on the outer side of the top of the first slider 601. The connecting block 610 and the hinge seats 607 are hinged together by the fixing rod 608. The slots 613 are evenly distributed on the top of the second slider 604. The slots 613 and the buckles 612 correspond one-to-one. The buckles 612 and the second slider 604 are engaged by the slots 613.

[0033] By sliding the first slider 601 and the second slider 604 close to each other on the flange necks of the two flanges, the outer side of the second slider 604 engages with the inner side of the first slider 601, forming an annular sealing cavity structure. This causes the first sealing gasket 603 in the first sealing cavity 602 to abut against the bottom of the second slider 604 and the connecting bolt 505, while the second sealing gasket 606 in the second sealing cavity 605 abuts against the top of the connecting bolt 505. This further deforms the double sealing gaskets under the pressure of the slider engagement. The path of leakage of medium from the flange edge or bolt gap is blocked; and the hinge seat 607 on the first slider 601 is connected to the torsion spring 609 through the fixing rod 608. The connecting blocks 610 at both ends of the torsion spring 609 drive the connecting rod 611 and the buckle 612 to rotate, so that the buckle 612 is engaged in the slot 613 of the second slider 604. The elastic force of the torsion spring 609 continuously applies tension to ensure that the first slider 601 and the second slider 604 are tightly fitted, which enhances the vibration resistance and deformation resistance of the overall structure and avoids the degradation of sealing performance during long-term use.

[0034] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sealing flange, comprising a first flange (1); Its features are: A second flange (2) is installed at one end of the first flange (1). Both the first flange (1) and the second flange (2) are fixed with flange necks (3) at their ends that are far apart from each other. A retaining ring (4) is fixed at one end of the flange neck (3). A connecting structure (5) is provided inside the first flange (1) and the second flange (2). A reinforcing structure (6) is provided on the outer side of the flange neck (3). A first slider (601) is installed on the outer side of the flange neck (3) at one end of the first flange (1). A first sealing cavity (602) is provided inside the first slider (601). A first sealing gasket (603) is provided at the bottom of the first sealing cavity (602). A second slider (604) is installed on the outer side of the flange neck (3) at one end of the second flange (2). A second sealing cavity (605) is provided inside the second slider (604). A second sealing gasket (606) is provided at the top of the second sealing cavity (605).

2. A sealing flange according to claim 1, characterized in that: The connection structure (5) includes a groove (501) provided at the top of the first flange (1), a sealing ring (502) installed inside the groove (501), a protrusion (503) fixed at the bottom of the second flange (2), and through holes (504) provided at the edge positions inside the first flange (1) and the second flange (2), and connecting bolts (505) installed inside the through holes (504).

3. A sealing flange according to claim 2, characterized in that: The inside of the groove (501) fits into the outside of the protrusion (503), the bottom end of the protrusion (503) abuts against the top end of the sealing ring (502), and the through holes (504) are equally spaced at the inner edge positions of the first flange (1) and the second flange (2). The first flange (1) and the second flange (2) are fixedly connected by connecting bolts (505).

4. A sealing flange according to claim 1, characterized in that: A hinge seat (607) is fixed on the outer side of the top of the first slider (601). A fixing rod (608) is installed inside the hinge seat (607). A torsion spring (609) is installed on the outer side of the fixing rod (608). A connecting block (610) is fixed at both ends of the torsion spring (609). A connecting rod (611) is fixed on one side of the connecting block (610). A buckle (612) is fixed at one end of the connecting rod (611). A slot (613) is provided at the top of the second slider (604).

5. A sealing flange according to claim 1, characterized in that: The first slider (601) and the second slider (604) are both arranged in a circular shape. The first slider (601) and the second slider (604) are slidably connected to the flange neck (3). The outer side of the second slider (604) is fitted with the inner side of the first slider (601).

6. A sealing flange according to claim 2, characterized in that: The bottom end of the second slider (604) abuts against the top end of the first sealing gasket (603), the top end of the connecting bolt (505) abuts against the bottom end of the second sealing gasket (606), and the bottom end of the connecting bolt (505) abuts against the top end of the first sealing gasket (603).

7. A sealing flange according to claim 4, characterized in that: The hinge seats (607) are evenly distributed on the outer side of the top of the first slider (601). The connecting block (610) and the hinge seats (607) are hinged together by the fixing rod (608). The slots (613) are evenly distributed on the top of the second slider (604). The slots (613) correspond one-to-one with the buckles (612). The buckles (612) and the second slider (604) are engaged by the slots (613).

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