Pipe connecting flange with good sealing effect

Abstract

This utility model discloses a pipe connection flange with good sealing effect, relating to the field of connection flange technology. It includes a left-side pipe fitting, a right-side pipe fitting, and a sealing gasket. The sealing gasket is fitted onto the outer wall of the left-side pipe fitting, with both sides of its outer wall tightly against the outer walls of the left and right-side pipe fittings, respectively. The end of the left-side pipe fitting is inserted into the center of the inner cavity of the right-side pipe fitting. The bolts of the left-side pipe fitting are aligned with the circular through-holes of the right-side pipe fitting and inserted. Multiple threaded knobs are simultaneously rotated to tighten multiple bolts at the same time, ensuring uniform distribution of preload on the flange surface. During rotation, the warped components on the outer wall of the threaded knobs rotate with the knobs, sequentially embedding into different one-way slots in a counter-clockwise direction, forming a physical lock. When the pipe is subjected to vibration, the one-way slots prevent the threaded knobs from rotating in the opposite direction, effectively offsetting the preload attenuation caused by environmental vibration and reducing the risk of leakage.

Description

Technical Field

[0001] This utility model relates to the field of connecting flange technology, specifically a pipe connecting flange with good sealing effect. Background Technology

[0002] Pipeline flanges are detachable components used in piping systems to connect two sections of pipe or pipes to equipment. The flanges are welded or threaded to the ends of the pipes to be connected, with a sealing gasket sandwiched in between, and then bolts are tightened evenly. The gasket is squeezed to achieve a seal, thus forming a stable fluid channel. Flange connections have the advantages of easy disassembly, good sealing performance, and strong adaptability, and are widely used in industrial fields such as petroleum, chemical, and water treatment.

[0003] According to the search results, Chinese patent document, publication number CN223019697U, discloses a sealing structure for a pipe connection flange, including a flange assembly, a connecting component movably connected to the flange assembly, and a transport component fixedly connected to one end of the flange assembly. The flange assembly includes a flange plate, a pipe connection end fixedly connected to one side of the flange plate, and an installation groove A on the other side of the flange plate. A sealing ring A is movably connected to the inner surface of the installation groove A. An annular groove is provided inside the installation groove A, and an installation groove B is provided inside the annular groove. An installation seat is provided in the installation groove B, and a sealing ring B is movably connected to one side of the installation seat. The connecting component includes bolts, which pass through a pair of flange plates and are threadedly connected to nuts. The transport component includes a pipe, one end of which is fixedly connected to the pipe connection end. By setting up the flange assembly and designing two sets of sealing rings to increase the overall sealing performance, a spring provides a thrust to the installation seat to completely compress the sealing ring B, thereby increasing the sealing performance between the flanges.

[0004] The aforementioned flange sealing structure, by adding a gasket between the flange and the nut, can prevent the bolts and nuts from loosening to some extent by increasing the friction between the nut and the flange. However, due to the lack of physical locking constraints, under long-term vibration, the mating surfaces of the bolts and nuts cannot maintain a long-term tightness solely through the friction of the gasket. The preload will gradually decrease with the vibration in the environment. Once an individual nut loosens, it may lead to uneven distribution of sealing pressure across the entire flange surface, thereby causing a sudden leakage risk. In view of this, we provide a pipe connection flange with better sealing performance. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a pipe connection flange with good sealing effect.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a pipe connection flange with good sealing effect, including a left pipe fitting, a right pipe fitting, and a sealing gasket. The sealing gasket is sleeved on the outer wall of the left pipe fitting, and both sides of the outer wall of the sealing gasket are respectively close to the outer walls of the left and right pipe fittings. The end of the left pipe fitting is inserted into the center of the inner cavity of the right pipe fitting. Multiple bolts are added to the outer wall of the left pipe fitting near the right pipe fitting. Multiple circular through holes are opened on the outer wall of the right pipe fitting, and multiple threaded knobs are rotatably connected to the outer wall of the right pipe fitting. A limiting ring is added to one side of the outer wall of the right pipe fitting, and a one-way groove is opened on the inner wall of the limiting ring.

[0007] As mentioned above, the outer wall thread of the bolt is recessed, and the bolt passes through the inner cavity of the circular through hole.

[0008] As described above, the circular through hole is interconnected with the inner center of the threaded knob, and the inner center of the threaded knob is threadedly connected to the outer wall of the bolt.

[0009] As described above, the outer wall of the threaded knob is provided with multiple protrusions, and a warping member is provided on one side of the outer wall of the multiple protrusions.

[0010] As described above, one side of the outer wall of the warped member is embedded into the one-way slot, and the warped member is cut from elastic metal, with one side of the outer wall of the warped member engaging with the inside of the one-way slot.

[0011] As described above, the outer wall of the protrusion is slidably connected to an arc-shaped baffle via a slide rail, and the inner wall of the arc-shaped baffle is provided with multiple arc-shaped grooves, the curvature of the inner wall of the arc-shaped grooves corresponding to the top of the outer wall of the warped component.

[0012] Compared with existing technologies, this type of pipe connection flange with good sealing performance has the following advantages:

[0013] I. This utility model aligns and inserts the bolts of the left-side pipe fitting with the circular through-holes of the right-side pipe fitting, and simultaneously rotates multiple threaded knobs to tighten multiple bolts at the same time, so that the preload on the flange surface is evenly distributed. During the rotation, the warped component on the outer wall of the threaded knob rotates with the threaded knob and is sequentially embedded into different one-way slots in a counterclockwise order to form a physical lock. When the pipeline is vibrated, the one-way slots can prevent the threaded knobs from rotating in the opposite direction, effectively offsetting the problem of preload attenuation caused by environmental vibration and shock, and reducing the risk of leakage.

[0014] II. When it is necessary to separate the left and right pipe fittings, this utility model only requires pushing the arc-shaped baffle to bend the warped component downwards, so that the warped component separates from the inner wall of the one-way slot and engages with the arc-shaped slot. Then the threaded knob can be rotated in the opposite direction to further improve the stability of the device during use. While achieving physical locking, it also facilitates the disassembly of the device.

[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 present invention;

[0017] Figure 2 This is a side sectional view of the present invention;

[0018] Figure 3 This is a partial three-dimensional structural diagram of the left-side pipe fitting of this utility model;

[0019] Figure 4 This is a partially cross-sectional three-dimensional structural diagram of the present invention;

[0020] Figure 5 This is a partial structural schematic diagram of the warped component of this utility model;

[0021] Figure 6 This is a partial three-dimensional structural diagram of the threaded knob of this utility model;

[0022] Figure 7 This is a partial three-dimensional structural diagram of the arc-shaped baffle of this utility model.

[0023] In the diagram: 1. Left-side pipe fitting; 101. Bolt;

[0024] 2. Right-side fitting; 201. Circular through hole; 202. Threaded knob; 2021. Protrusion; 2022. Warped component; 2023. Arc-shaped baffle; 2024. Arc-shaped groove; 203. Limiting ring; 2031. One-way slot;

[0025] 3. Sealing gasket. Detailed Implementation

[0026] 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.

[0027] like Figure 1-7As shown, this utility model provides a technical solution: a pipe connection flange with good sealing effect, including a left pipe fitting 1, a right pipe fitting 2 and a sealing gasket 3. The sealing gasket 3 is sleeved on the outer wall of the left pipe fitting 1, and the two sides of the outer wall of the sealing gasket 3 are respectively close to the outer walls of the left pipe fitting 1 and the right pipe fitting 2. The end of the left pipe fitting 1 is inserted into the center of the inner cavity of the right pipe fitting 2. Multiple bolts 101 are added to the outer wall of the left pipe fitting 1 near the right pipe fitting 2. Multiple circular through holes 201 are opened on the outer wall of the right pipe fitting 2. Multiple threaded knobs 202 are rotatably connected to the outer wall of the right pipe fitting 2. A limiting ring 203 is added to one side of the outer wall of the right pipe fitting 2, and a one-way groove 2031 is opened on the inner wall of the limiting ring 203.

[0028] Align and insert the bolt 101 of the left pipe fitting 1 with the circular through hole 201 of the right pipe fitting 2, and simultaneously rotate multiple threaded knobs 202 to tighten multiple bolts 101 at the same time, so that the preload on the flange surface is evenly distributed. During the rotation, the warped member 2022 on the outer wall of the threaded knob 202 rotates with the threaded knob 202 and is sequentially inserted into different one-way slots 2031 in a counterclockwise order to form a physical lock. When it is necessary to separate the left pipe fitting 1 from the right pipe fitting 2, simply push the arc-shaped baffle 2023 along the upward bending end of the warped member 2022 to separate the warped member 2022 from the inner wall of the one-way slot 2031 and enter the arc-shaped baffle 2023 to engage with its internal arc-shaped groove 2024, and then rotate the threaded knob 202 in the opposite direction.

[0029] like Figure 2 As shown, the outer wall thread of bolt 101 is recessed, and bolt 101 passes through the inner cavity of circular through hole 201.

[0030] The concave thread on the outer wall of bolt 101 allows it to be smoothly inserted into the circular through hole 201 for positioning.

[0031] like Figure 2 As shown, the circular through hole 201 is connected to the inner center of the threaded knob 202, and the inner center of the threaded knob 202 is threadedly connected to the outer wall of the bolt 101.

[0032] The design of the circular through hole 201 and the threaded knob 202 allows the threaded knob 202 to directly tighten the bolt 101 that passes through the circular through hole 201.

[0033] like Figure 4 As shown, the outer wall of the threaded knob 202 is provided with multiple protrusions 2021, and a warping member 2022 is provided on one side of the outer wall of the multiple protrusions 2021.

[0034] The warped component 2022 is in an upward-curving posture, which provides conditions for subsequent elastic engagement.

[0035] like Figure 4As shown, one side of the outer wall of the warping member 2022 is embedded into the one-way slot 2031, and the warping member 2022 is cut from elastic metal, with one side of the outer wall of the warping member 2022 engaging with the inside of the one-way slot 2031.

[0036] The warping member 2022 on the outer wall of the threaded knob 202 elastically engages with the one-way groove 2031 of the limiting ring 203, which can achieve physical locking after the threaded knob 202 is tightened. When the threaded knob 202 is vibrated and has a tendency to rotate in reverse, the warping member 2022 is embedded in the one-way groove 2031 to effectively prevent reverse rotation.

[0037] like Figure 7 As shown, the outer wall of the protrusion 2021 is slidably connected to the arc-shaped baffle 2023 via a slide rail, and the inner wall of the arc-shaped baffle 2023 is provided with multiple arc-shaped grooves 2024, the curvature of the inner wall of the arc-shaped grooves 2024 corresponding to the top of the outer wall of the warped member 2022.

[0038] The arc-shaped baffle 2023 is slidably connected to the protrusion 2021 via a slide rail. Its arc-shaped groove 2024 has the same curvature as the top of the warped member 2022, which can closely fit and limit the top of the warped member 2022, swing the warped member 2022 downward, and separate it from the inner wall of the one-way slot 2031.

[0039] like Figure 6 As shown, a handle is provided on one side of the outer wall of the arc-shaped baffle 2023, which makes it convenient for users to move the arc-shaped baffle 2023 during use.

[0040] It should be noted that the warping member 2022 is made of elastic metal and will rotate as the threaded knob 202 rotates.

[0041] Working principle: In a petrochemical pipeline system, the left fitting 1 is inserted into the inner cavity of the right fitting 2, so that the sealing gasket 3 fitted on the outer wall of the left fitting 1 is tightly fitted to the outer walls of both fittings. Then, the bolt 101 of the left fitting 1 is passed through the circular through hole 201 of the right fitting 2, and the threaded knob 202 is turned to tighten the bolt 101. At this time, the warping member 2022 on the outer wall of the threaded knob 202 is inserted into different one-way slots 2031 in sequence during the tightening process. With the cooperation of the one-way slots 2031 and the warping member 2022, the threaded knob 202 can be prevented from rotating in the opposite direction. When it is necessary to separate the fittings, push the arc-shaped baffle 2023 to press the warping member 2022 into the arc-shaped groove 2024. After releasing the engagement with the one-way slot 2031, the threaded knob 202 can be rotated in the opposite direction to disassemble.

[0042] 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 pipe connecting flange with good sealing effect, comprising a left pipe fitting (1), a right pipe fitting (2) and a sealing gasket (3), characterized in that: The sealing gasket (3) is fitted on the outer wall of the left pipe fitting (1), and the two sides of the outer wall of the sealing gasket (3) are respectively close to the outer walls of the left pipe fitting (1) and the right pipe fitting (2). The end of the left pipe fitting (1) is inserted into the center of the inner cavity of the right pipe fitting (2), and multiple bolts (101) are added to the outer wall of the left pipe fitting (1) near the right pipe fitting (2). Multiple circular through holes (201) are opened on the outer wall of the right pipe fitting (2), and multiple threaded knobs (202) are rotatably connected to the outer wall of the right pipe fitting (2). A limiting ring (203) is added to one side of the outer wall of the right pipe fitting (2), and a one-way groove (2031) is opened on the inner wall of the limiting ring (203).

2. A pipe connecting flange with a sealing effect according to claim 1, characterized in that: The bolt (101) has a concave thread on its outer wall and passes through the inner cavity of the circular through hole (201).

3. A pipe connecting flange with a sealing effect according to claim 2, characterized in that: The circular through hole (201) is connected to the center of the threaded knob (202), and the center of the threaded knob (202) is threaded to the outer wall of the bolt (101).

4. A pipe connecting flange with a sealing effect according to claim 3, characterized in that: The outer wall of the threaded knob (202) is provided with multiple protrusions (2021), and a warping member (2022) is provided on one side of the outer wall of the multiple protrusions (2021).

5. A pipe connection flange with good sealing effect according to claim 4, characterized in that: The outer wall of the warped member (2022) is embedded into the one-way slot (2031) on one side, and the warped member (2022) is cut from elastic metal. The outer wall of the warped member (2022) engages with the inside of the one-way slot (2031).

6. A pipe connection flange with good sealing effect according to claim 5, characterized in that: The outer wall of the protrusion (2021) is slidably connected to an arc-shaped baffle (2023) via a slide rail, and the inner wall of the arc-shaped baffle (2023) is provided with multiple arc-shaped grooves (2024), the curvature of the inner wall of the arc-shaped grooves (2024) corresponds to the top of the outer wall of the warped member (2022).

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