CN-224229489-U - Anti-loosening flange

Abstract

The utility model discloses an anti-loosening flange, which relates to the technical field of pipeline connection and comprises two flange plates, wherein the flange plates are divided into a sealing surface and a threaded cylinder, the two flange plates are connected through threaded fit between the threaded cylinder, two convex rings are arranged on the sealing surfaces of the two flange plates, the two convex rings are positioned on the same center, a sealing ring is arranged between the two convex rings, a gradient arc-shaped groove is formed on the sealing surface of one flange plate, a through hole is formed on the sealing surface of the other flange plate, a sealing plate is arranged in the through hole, a push rod is connected with the through hole in a sliding manner, and a pressure spring is fixedly connected between the push rod and the sealing plate.

Inventors

• Ju Zhaojin

Assignees

• 常州索鑫莱机械有限公司

Dates

Publication Date

20260512

Application Date

20250630

Claims (5)

1. 1. The anti-loosening flange comprises two flange plates (1), wherein the flange plates (1) are divided into sealing surfaces and threaded barrels, the two flange plates (1) are connected through threaded cooperation between the threaded barrels, two convex rings (2) are arranged on the sealing surfaces of the two flange plates (1), the two convex rings (2) are located on the same circle, a sealing ring (6) is arranged between the two convex rings (2), and the anti-loosening flange is characterized in that a gradient arc-shaped groove (3) is formed in the sealing surface of one flange plate (1), a through hole (4) is formed in the sealing surface of the other flange plate (1), a sealing plate (8) is arranged in the through hole (4), a push rod (5) is connected to the sliding connection of the through hole (4), and a pressure spring (7) is fixedly connected between the push rod (5) and the sealing plate (8).
2. 2. The anti-loosening flange according to claim 1 is characterized in that threaded holes are formed in the sealing surface of the flange plate (1) at equal intervals, and the two flange plates (1) are installed and positioned through the threaded holes.
3. 3. The anti-loosening flange according to claim 1, wherein the outer periphery of the sealing plate (8) is provided with a lug (9), the end part of the through hole (4) is provided with an L-shaped groove (13), and the lug (9) is in clamping fit with the L-shaped groove (13).
4. 4. The anti-loosening flange according to claim 1, wherein a limiting table (11) is arranged at the end part of the ejector rod (5), a baffle ring (12) is fixedly connected to the other end part of the through hole (4), and the ejector rod (5) is prevented from falling off through the cooperation of the limiting table (11) and the baffle ring (12).
5. 5. A locking flange according to claim 1, characterized in that the outer surface of the sealing plate (8) is provided with a handle (10), and the handle (10) controls the sealing plate (8) to be clamped and matched in the through hole (4).

Description

Anti-loosening flange Technical Field The utility model relates to the technical field of pipeline connection, in particular to an anti-loosening flange. Background Flanges are commonly used disk-shaped parts for connecting pipelines, equipment and the like, are commonly used in pairs, and are fixed by bolts to realize connection and sealing between the pipelines, and the equipment and the like. The material is various, carbon steel, stainless steel, copper and the like are available, different types of the material are suitable for different pressure, temperature and medium environments, the material is widely applied in the fields of industrial pipelines, chemical industry, petroleum, buildings and the like, and the material is an important component for pipeline system connection. The existing flange connection structure lacks of anti-loosening design, when the liquid flow in the pipeline is unstable, noise is easily generated due to turbulence, and meanwhile vibration of the pipeline is caused. The vibration can gradually loosen the flange connection part, so that the connection stability is affected, the sealing performance is more likely to be damaged, and potential safety hazards such as medium leakage and the like are caused. The problem is particularly prominent in the working condition that the fluid fluctuation is frequent, and the reliability and the tightness of flange connection are required to be improved through structural optimization. Disclosure of utility model The utility model aims to solve the problem that the existing flange lack-loosening structure in the prior art is easy to loosen due to vibration of a pipeline caused by unstable fluid, and provides a loosening-preventing flange. In order to achieve the purpose, the anti-loosening flange comprises two flange plates, wherein the flange plates are divided into sealing surfaces and threaded cylinders, the two flange plates are connected through threaded matching between the threaded cylinders, two convex rings are arranged on the sealing surfaces of the two flange plates, the two convex rings are positioned on the same circle center, a sealing ring is arranged between the two convex rings, a gradient arc-shaped groove is formed in the sealing surface of one flange plate, a through hole is formed in the sealing surface of the other flange plate, a sealing plate is arranged in the through hole, a push rod is connected to the through hole in a sliding mode, and a compression spring is fixedly connected between the push rod and the sealing plate. Preferably, the sealing surfaces of the flanges are provided with threaded holes at equal intervals, and the two flanges are installed and positioned through the threaded holes. Preferably, the outer periphery of the sealing plate is provided with a lug, the end part of the through hole is provided with an L-shaped groove, and the lug is matched with the L-shaped groove in a clamping way. Preferably, the end part of the ejector rod is provided with a limiting table, the other end part of the through hole is fixedly connected with a baffle ring, and the ejector rod is prevented from falling through the cooperation of the limiting table and the baffle ring. Preferably, the outer surface of the sealing plate is provided with a handle, and the sealing plate is controlled to be clamped and matched in the through hole through the handle. Compared with the prior art, the utility model has the advantages and positive effects that: 1. According to the utility model, the gradient arc-shaped groove is utilized to be matched with the one-way clamping of the ejector rod, when the flange is unscrewed, the ejector rod is automatically clamped into the deep-end step of the groove under the action of the pressure spring, so that mechanical locking is formed, the looseness prevention can be realized without additional tools, the working conditions of self-adaptive vibration, load fluctuation and the like can be realized, and the problem of loosening of the traditional bolt is avoided. 2. According to the utility model, the ejector rod is prevented from falling off through the limiting table and the baffle ring, the sealing plate can be rapidly detached to replace internal parts such as the pressure spring by means of the clamping design of the convex blocks and the L-shaped grooves, the flange is not required to be integrally disassembled, and the maintenance cost and the time cost are reduced. Drawings Fig. 1 is a schematic diagram of a three-dimensional structure of a locking flange according to the present utility model; fig. 2 is a schematic diagram showing a three-dimensional structure of a locking flange according to the present utility model; FIG. 3 is a schematic view showing the internal structure of a through groove in a locking flange according to the present utility model; Fig. 4 is a schematic structural view of a flange plate in an anti-loosening flange according to the present utility model; Fig. 5