A leakproof flange with good air tightness

Abstract

This utility model discloses a leak-proof flange with good airtightness, relating to the field of flange technology. It includes a first flange, with a second flange located on one side of the first flange. A hexagonal bolt connects the second flange and the first flange, and a nut is provided on the surface of the hexagonal bolt. This utility model allows pressing a horizontal plate to move a trapezoidal block against a pressing block. When the pressing block moves, it moves a vertical rod and a limiting ring upwards, allowing the vertical rod to press against a first spring, thus separating the limiting ring from the hexagonal bolt. Conversely, pulling the horizontal plate moves a connecting rod and a trapezoidal block, which in turn moves the pressing block. The reset effect of the first spring allows the limiting ring to engage with the hexagonal bolt, improving the nut's secure installation and preventing loosening. This provides a good anti-loosening effect, thus preventing gas leakage during the use of the leak-proof flange.

Description

Technical Field

[0001] This utility model relates to the field of flange technology, specifically a leak-proof flange with good airtightness. Background Technology

[0002] Leak-proof flanges are flanges with special design and structure to enhance sealing performance and prevent leakage at pipe connections. The flange connection is detachable, which facilitates the inspection, cleaning or replacement of parts of the pipeline system, reduces maintenance costs, and ensures the safe operation of the pipeline system under extreme conditions such as high pressure and corrosion.

[0003] When existing leak-proof flanges are in use, the vibration caused by gas flow within the pipeline can lead to the bolts at the flange connection loosening due to long-term vibration. This loosening of the bolts creates gaps in the flange connection, allowing gas to leak along these gaps and reducing the airtightness of the flange during use. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a leak-proof flange with good airtightness.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a leak-proof flange with good airtightness, comprising a first flange, a second flange provided on one side of the first flange, a hexagonal bolt connecting the second flange and the first flange, a nut provided on the surface of the hexagonal bolt, a sealing gasket extending into the interior of the second flange provided on one side of the first flange, a reserved groove provided at one end of the second flange near the sealing gasket, a limiting mechanism extending outward provided inside the nut, the limiting mechanism including a horizontal plate provided at the top of the nut, and a connecting rod extending into the interior of the nut provided at one end of the horizontal plate.

[0006] As described above, a trapezoidal block is provided on one side of the connecting rod, a vertical rod is provided inside the nut, and a limit ring is provided at one end of the vertical rod.

[0007] As described above, a pressing block extending into the interior of the vertical rod is provided on one side of the trapezoidal block, and a first spring is welded between the top of the vertical rod and the nut.

[0008] As described above, an anti-loosening mechanism is provided inside the nut on the side near the connecting rod, and the anti-loosening mechanism includes a limiting plate disposed inside the nut.

[0009] As described above, the top of the limiting plate is provided with a fixing rod extending to the outside of the nut.

[0010] As described above, a pull rod is provided at one end of the fixing rod, and a C-shaped block is provided on one side of the pull rod, with the C-shaped block fitted onto the surface of the connecting rod.

[0011] As described above, one end of the pull rod is provided with an insert rod extending into the nut, and a second spring is welded between the limiting plate and the nut.

[0012] Compared with existing technologies, this leak-proof flange with good airtightness has the following advantages:

[0013] I. This utility model allows the horizontal plate to be pressed, which in turn drives the trapezoidal block to push the extrusion block. When the extrusion block moves, it drives the vertical rod and the limiting ring to move upward, allowing the vertical rod to compress the first spring and the limiting ring to separate from the hexagonal bolt. Conversely, pulling the horizontal plate moves the connecting rod and the trapezoidal block, which in turn moves the extrusion block. Through the reset effect of the first spring, the limiting ring can be engaged with the hexagonal bolt, improving the firmness and anti-loosening properties of the nut during installation and providing a better anti-fall-off effect. This also prevents gas leakage during the use of the leak-proof flange.

[0014] II. This utility model can separate the C-shaped block from the connecting rod by pulling the insertion rod, and the moving rod can also move the fixing rod and the limiting plate, so that the limiting plate can compress the second spring. After the limiting ring and the hexagonal bolt are limited, the pulling rod is loosened. Through the reset effect of the second spring, the C-shaped block can be engaged with the connecting rod, thereby preventing the horizontal plate from moving and having a good limiting effect.

[0015] Other advantages, objectives and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be taught from the practice of this invention. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the first flange of this utility model;

[0017] Figure 2 This is a three-dimensional structural diagram of the sealing gasket of this utility model;

[0018] Figure 3 This is a three-dimensional structural diagram of the second flange of this utility model;

[0019] Figure 4 This is a three-dimensional structural diagram of the nut of this utility model;

[0020] Figure 5 This is a three-dimensional cross-sectional view of the nut of this utility model;

[0021] Figure 6 This utility model Figure 5 A magnified schematic diagram of the structure at point A in the middle.

[0022] In the diagram: 1. First flange; 2. Second flange; 3. Hexagonal bolt; 4. Nut; 5. Sealing gasket; 6. Reserved groove; 7. Limiting mechanism; 701. Horizontal plate; 702. Connecting rod; 703. Trapezoidal block; 704. Vertical rod; 705. Limiting ring; 706. Extrusion block; 707. First spring; 8. Anti-loosening mechanism; 801. Limiting plate; 802. Fixing rod; 803. Pull rod; 804. C-block; 805. Insert rod; 806. Second spring. Detailed Implementation

[0023] 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.

[0024] like Figures 1-5 As shown, this utility model provides a technical solution: a leak-proof flange with good airtightness, including a first flange 1, a second flange 2 provided on one side of the first flange 1, a hexagonal bolt 3 connecting the second flange 2 and the first flange 1, a nut 4 provided on the surface of the hexagonal bolt 3, a sealing gasket 5 extending into the interior of the second flange 2 provided on one side of the first flange 1, a reserved groove 6 provided at one end of the second flange 2 near the sealing gasket 5, a limiting mechanism 7 extending outwards provided inside the nut 4, the limiting mechanism 7 including a horizontal plate 701 provided at the top of the nut 4, and a connecting rod 702 extending into the interior of the nut 4 provided at one end of the horizontal plate 701.

[0025] like Figure 4 As shown, a trapezoidal block 703 is provided on one side of the connecting rod 702, and a vertical rod 704 is provided inside the nut 4. A limit ring 705 is provided at one end of the vertical rod 704.

[0026] The limiting ring 705 is used to limit the hexagonal bolt 3.

[0027] like Figure 5 As shown, a pressing block 706 extending into the interior of the vertical rod 704 is provided on one side of the trapezoidal block 703, and a first spring 707 is welded between the top of the vertical rod 704 and the nut 4.

[0028] The vertical rod 704 is moved so that it can compress the first spring 707.

[0029] like Figures 1-5As shown, by pressing the horizontal plate 701, the horizontal plate 701 moves, causing the connecting rod 702 to move. Simultaneously, the connecting rod 702 moves, causing the trapezoidal block 703 to move. The trapezoidal block 703 pushes the pressing block 706, causing the pressing block 706 to move, causing the vertical rod 704 to move upward. The vertical rod 704 moves, causing the limiting ring 705 to move upward. When the vertical rod 704 moves upward, it presses the first spring 707, allowing the limiting ring 705 to separate from the hexagonal bolt 3. Conversely, through the reset effect of the first spring 707, the limiting ring 705 can be engaged with the hexagonal bolt 3, improving the firmness and anti-loosening properties of the nut 4 during installation, providing a better anti-fall-off effect, and thus preventing gas leakage during the use of the leak-proof flange.

[0030] like Figure 6 As shown, an anti-loosening mechanism 8 is provided inside the nut 4 on the side near the connecting rod 702. The anti-loosening mechanism 8 includes a limiting plate 801 provided inside the nut 4, and a fixing rod 802 extending to the outside of the nut 4 is provided at the top of the limiting plate 801.

[0031] The movement of the limiting plate 801 enables the fixed rod 802 to move.

[0032] like Figure 6 As shown, a pull rod 803 is provided at one end of the fixed rod 802, and a C-shaped block 804 is provided on one side of the pull rod 803. The C-shaped block 804 is sleeved on the surface of the connecting rod 702. An insert rod 805 extending into the nut 4 is provided at one end of the pull rod 803. A second spring 806 is welded between the limiting plate 801 and the nut 4.

[0033] The insertion rod 805 is used to limit the movement of the pull rod 803.

[0034] like Figures 1-4 and Figure 6 As shown, by pulling the insertion rod 805, the insertion rod 805 can be separated from the nut 4. Then, by pulling the pull rod 803, the pull rod 803 can move the C-shaped block 804, allowing the C-shaped block 804 to separate from the connecting rod 702. The pull rod 803 can also move the fixing rod 802, and the fixing rod 802 can move the limiting plate 801, allowing the limiting plate 801 to compress the second spring 806. After the limiting ring 705 is limited by the hexagonal bolt 3, the pull rod 803 is loosened. Through the reset effect of the second spring 806, the C-shaped block 804 can be engaged with the connecting rod 702, thereby preventing the horizontal plate 701 from moving and providing a good limiting effect.

[0035] It should be noted that: by connecting the first flange 1 and the second flange 2, the sealing gasket 5 can be connected with the reserved groove 6, which can improve the sealing performance of the flange and prevent leakage. Then, the hexagonal bolt 3 can be turned to lock the first flange 1 and the second flange 2.

[0036] Working principle: Pressing the horizontal plate 701 moves the connecting rod 702 and the trapezoidal block 703, causing the trapezoidal block 703 to push the pressing block 706. The pressing block 706 then moves the vertical rod 704 and the limiting ring 705 upwards. The upward movement of the vertical rod 704 compresses the first spring 707, causing the limiting ring 705 to separate from the hexagonal bolt 3. Conversely, pulling the horizontal plate 701 moves the connecting rod 702 and the trapezoidal block 703, causing the pressing block 706 to move. The reset effect of the first spring 707 allows the limiting ring 705 to engage with the hexagonal bolt 3, improving the stability and anti-loosening properties of the nut 4 during installation and providing a good anti-fall-off effect, thus preventing gas leakage during the use of the leak-proof flange.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A leak-proof flange with good airtightness, comprising a first flange (1), characterized in that: A second flange (2) is provided on one side of the first flange (1). A hexagonal bolt (3) is connected between the second flange (2) and the first flange (1). A nut (4) is provided on the surface of the hexagonal bolt (3). A sealing gasket (5) extending into the interior of the second flange (2) is provided on one side of the first flange (1). A reserved groove (6) is provided at one end of the second flange (2) near the sealing gasket (5). A limiting mechanism (7) extending outward is provided inside the nut (4). The limiting mechanism (7) includes a horizontal plate (701) provided at the top of the nut (4). A connecting rod (702) extending into the interior of the nut (4) is provided at one end of the horizontal plate (701).

2. The leak-proof flange with good airtightness according to claim 1, characterized in that: A trapezoidal block (703) is provided on one side of the connecting rod (702), a vertical rod (704) is provided inside the nut (4), and a limit ring (705) is provided at one end of the vertical rod (704).

3. The leak-proof flange with good airtightness according to claim 2, characterized in that: A compression block (706) extending into the interior of the vertical rod (704) is provided on one side of the trapezoidal block (703), and a first spring (707) is welded between the top of the vertical rod (704) and the nut (4).

4. A leak-proof flange with good airtightness according to claim 3, characterized in that: An anti-loosening mechanism (8) is provided inside the nut (4) on the side near the connecting rod (702). The anti-loosening mechanism (8) includes a limiting plate (801) provided inside the nut (4).

5. A leak-proof flange with good airtightness according to claim 4, characterized in that: The top of the limiting plate (801) is provided with a fixing rod (802) extending to the outside of the nut (4).

6. A leak-proof flange with good airtightness according to claim 5, characterized in that: One end of the fixed rod (802) is provided with a pull rod (803), and a C-shaped block (804) is provided on one side of the pull rod (803). The C-shaped block (804) is sleeved on the surface of the connecting rod (702).

7. A leak-proof flange with good airtightness according to claim 6, characterized in that: One end of the pull rod (803) is provided with an insert rod (805) extending into the nut (4), and a second spring (806) is welded between the limiting plate (801) and the nut (4).

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